diff --git a/.github/workflows/codespell.yml b/.github/workflows/codespell.yml
index f9a29030e0..09ab63d879 100644
--- a/.github/workflows/codespell.yml
+++ b/.github/workflows/codespell.yml
@@ -1,4 +1,7 @@
-# Check for typos on devel and pull rquests
+# Check for typos on release and on-demand branches
+#
+# NOTE: this is not run on devel or pull requests
+#
 # - codespell configuration is within .codespellrc
 # - the workflow can be run separately from other workflows that trigger on
 #   ci/* branches, use codespell/* as the prefix
@@ -9,13 +12,8 @@ run-name: Codespell
 on:
   push:
     branches:
-      - devel
-      - 'ci/**'
+      - release-test
       - 'codespell/**'
-  pull_request:
-    branches:
-      - devel
-      - 'ci/**'
 
 permissions:
   contents: read
diff --git a/.github/workflows/devel.yml b/.github/workflows/devel.yml
index ece98db252..1cb9846f2e 100644
--- a/.github/workflows/devel.yml
+++ b/.github/workflows/devel.yml
@@ -9,7 +9,6 @@ on:
     branches:
       - devel
       - 'ci/**'
-      - 'CI/**'
 jobs:
   build-simple:
     name: Simple build tests, manual page build test
diff --git a/.github/workflows/ci-build-test.yml b/.github/workflows/image-build-test.yml
similarity index 100%
rename from .github/workflows/ci-build-test.yml
rename to .github/workflows/image-build-test.yml
diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
new file mode 100644
index 0000000000..a4c44b838d
--- /dev/null
+++ b/.github/workflows/python.yml
@@ -0,0 +1,41 @@
+# Run python tests on various version
+#
+# NOTE: The minimum compatible version is 3.6 but the CI base image does not provide it.
+# NOTE: The recent python versions (3.12 and up) fail to set up due to old python3-setuptools in the image
+# NOTE: The workflow could still pass even if the individual tests fail (FIXME)
+
+name: Python bindings tests
+run-name: Python bindings tests
+on:
+  push:
+    branches:
+      - "ci/**"
+      - devel
+      - release-test
+      - master
+jobs:
+  python-test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        # 3.6 not available since 22.04
+        # 3.12 broken on 24.04 (no setuptools found during build despite being installed, FIXME)
+        # 3.13 not available on 24.04
+        python-version: ["3.9", "3.10", "3.11"]
+    steps:
+      - uses: actions/checkout@v4
+      - run: sudo apt-get update -qqq
+      - run: sudo apt-get install -y pkg-config gcc liblzo2-dev libzstd-dev libblkid-dev uuid-dev zlib1g-dev libext2fs-dev e2fsprogs libudev-dev python3-sphinx libaio-dev liburing-dev python3-setuptools
+      - name: Set up python
+        uses: actions/setup-python@v6
+        with:
+          python-version: ${{ matrix.python-version }}
+      - run: python -c "import sys; print(sys.version)"
+      - name: Configure
+        run: ./autogen.sh && ./configure --disable-documentation --disable-programs --disable-static
+      - name: Make
+        # With --disable-programs most of the tools are not built, but the tests still need mkfs
+        run: make V=1 -j 4 all mkfs.btrfs
+      - name: Test python
+        run: sudo make test-libbtrfsutil
diff --git a/.gitignore b/.gitignore
index 76f73a1c32..5fa3a73a6d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -75,6 +75,7 @@
 !.github
 !.readthedocs.yaml
 !.codespellrc
+!.pylintrc
 
 /ci/images/*/devel.tar.gz
 
diff --git a/CHANGES b/CHANGES
index 5edde25ba7..c589ddbbdc 100644
--- a/CHANGES
+++ b/CHANGES
@@ -612,8 +612,11 @@ btrfs-progs-6.0.2 (2022-11-24)
       * receive: fix silent data loss after fall back from encoded write
    * fi mkswapfile: new command to create a formatted swapfile in one go
 
+btrfs-progs-5.x (2022-09-12)
+----------------------------
+
 btrfs-progs-5.19 (2022-08-16)
------------------------------
+"""""""""""""""""""""""""""""
    * send: support protocol version 2
    * fi show: print all missing devices
    * device stats: add tabular output
@@ -633,7 +636,6 @@ btrfs-progs-5.19 (2022-08-16)
       * new tests
 
 btrfs-progs-5.19.1 (2022-09-12)
-"""""""""""""""""""""""""""""""
    * fix memory leaks (extent buffer, path)
    * check: verify block device size vs item
    * rescue fix-device-size: allow to shrink device item
@@ -644,7 +646,7 @@ btrfs-progs-5.19.1 (2022-09-12)
       * new tests
 
 btrfs-progs-5.18 (2022-05-25)
------------------------------
+"""""""""""""""""""""""""""""
    * fixes:
       * dump-tree: don't print trailing zeros in checksums
       * recognize paused balance as exclusive operation state, allow to start
@@ -661,7 +663,6 @@ btrfs-progs-5.18 (2022-05-25)
       * new tests
 
 btrfs-progs-5.18.1 (2022-06-06)
-"""""""""""""""""""""""""""""""
    * fixes:
       * convert: fix self reference of toplevel directory
       * build: make kernel lib headers compatible with C++
@@ -671,7 +672,7 @@ btrfs-progs-5.18.1 (2022-06-06)
    * other: documentation updates
 
 btrfs-progs-5.17 (2022-04-26)
------------------------------
+"""""""""""""""""""""""""""""
    * check:
       * repair wrong num_devices in superblock
       * recognize overly long xattr names
@@ -697,7 +698,7 @@ btrfs-progs-5.17 (2022-04-26)
        * add fsstress
 
 btrfs-progs-5.16 (2022-01-12)
------------------------------
+"""""""""""""""""""""""""""""
    * rescue: new subcommand clear-uuid-tree to fix failed mount due to bad uuid
      subvolume keys, caught by tree-checker
    * fi du: skip inaccessible files
@@ -713,7 +714,6 @@ btrfs-progs-5.16 (2022-01-12)
         https://btrfs.readthedocs.io
 
 btrfs-progs-5.16.1 (2022-02-04)
-"""""""""""""""""""""""""""""""
    * mkfs: support DUP on metadata on zoned devices
    * subvol delete: drop warning for root when search ioctl fails
    * check:
@@ -728,7 +728,6 @@ btrfs-progs-5.16.1 (2022-02-04)
       * CI targets updated
 
 btrfs-progs-5.16.2 (2022-02-16)
-"""""""""""""""""""""""""""""""
    * mkfs: fix detection of profile type for zoned mode when creating DUP
    * build:
       * add missing stub for zoned mode helper when zoned mode not enabled
@@ -740,7 +739,7 @@ btrfs-progs-5.16.2 (2022-02-16)
       * test updates
 
 btrfs-progs-5.15 (2021-11-05)
------------------------------
+"""""""""""""""""""""""""""""
    * mkfs: new defaults!
       * no-holes
       * free-space-tree
@@ -762,7 +761,6 @@ btrfs-progs-5.15 (2021-11-05)
       * new and updated tests
 
 btrfs-progs-5.15.1 (2021-11-22)
-"""""""""""""""""""""""""""""""
    * fixes:
       * fi usage: fix wrongly reported space of used or unallocated space
       * fix detection of block device discard capability
@@ -770,7 +768,7 @@ btrfs-progs-5.15.1 (2021-11-22)
    * build: make sphinx optional backend for documentation
 
 btrfs-progs-5.14 (2021-09-10)
------------------------------
+"""""""""""""""""""""""""""""
    * convert:
       * new option --uuid to copy, generate or set a given uuid
       * improve output
@@ -800,7 +798,6 @@ btrfs-progs-5.14 (2021-09-10)
       * new image dump format, with data
 
 btrfs-progs-5.14.1 (2021-09-20)
-"""""""""""""""""""""""""""""""
    * fixes:
       * defrag: fix parsing of compression (option -c)
       * add workaround for old kernels when reading zone sizes
@@ -809,7 +806,6 @@ btrfs-progs-5.14.1 (2021-09-20)
       * convert: --uuid copy does not fail on duplicate uuids
 
 btrfs-progs-5.14.2 (2021-10-08)
-"""""""""""""""""""""""""""""""
    * fixes
       * zoned mode
           * properly detect non-zoned devices in emulation mode
@@ -838,7 +834,7 @@ btrfs-progs-5.14.2 (2021-10-08)
       * new and updated tests
 
 btrfs-progs-5.13 (2021-07-13)
------------------------------
+"""""""""""""""""""""""""""""
    * restore: remove loop checks for extent count and directory scan
    * inspect dump-tree: new options to print node (--csum-headers) and data
      checksums (--csum-items)
@@ -863,7 +859,6 @@ btrfs-progs-5.13 (2021-07-13)
       * hash speedtest measure time, cycles using perf and print throughput
 
 btrfs-progs-5.13.1 (2021-07-30)
-"""""""""""""""""""""""""""""""
    * build: fix build on musl libc due to missing definition of NAME_MAX
    * check:
       * batch more work into one transaction when clearing v1 free space inodes
@@ -874,7 +869,7 @@ btrfs-progs-5.13.1 (2021-07-30)
       * documentation updates
 
 btrfs-progs-5.12 (2021-05-10)
------------------------------
+"""""""""""""""""""""""""""""
    * libbtrfsutil: relicensed to LGPL v2.1+
    * mkfs: zoned mode support (kernel 5.12+)
    * fi df: show zone_unusable per profile type in zoned mode
@@ -899,14 +894,13 @@ btrfs-progs-5.12 (2021-05-10)
       * update status of mount options since 5.9
 
 btrfs-progs-5.12.1 (2021-05-13)
-"""""""""""""""""""""""""""""""
    * build: fix missing symbols in libbtrfs
    * mkfs: check for minimal number of zones
    * check: fix warning about cache generation when free space tree is enabled
    * fix superblock write in zoned mode on 16K pages
 
 btrfs-progs-5.11 (2021-03-05)
------------------------------
+"""""""""""""""""""""""""""""
    * fix device path canonicalization for device mapper devices
    * receive: remove workaround for setting capabilities, all stable kernels
      have been patched
@@ -926,7 +920,6 @@ btrfs-progs-5.11 (2021-03-05)
          * docker images for various distros
 
 btrfs-progs-5.11.1 (2021-03-24)
-"""""""""""""""""""""""""""""""
    * properly format checksums when a mismatch is reported
    * check: fix false alert on tree block crossing 64K page boundary
    * convert:
@@ -940,7 +933,7 @@ btrfs-progs-5.11.1 (2021-03-24)
       * updated tests
 
 btrfs-progs-5.10 (2021-01-18)
------------------------------
+"""""""""""""""""""""""""""""
    * scrub status:
       * print percentage of progress
       * add size unit options
@@ -964,7 +957,6 @@ btrfs-progs-5.10 (2021-01-18)
       * debugging output enhancements
 
 btrfs-progs-5.10.1 (2021-02-05)
-"""""""""""""""""""""""""""""""
    * static build works again
    * other:
       * add a way to test static binaries with the testsuite
@@ -973,7 +965,7 @@ btrfs-progs-5.10.1 (2021-02-05)
         change in the future
 
 btrfs-progs-5.9 (2020-10-23)
-----------------------------
+""""""""""""""""""""""""""""
    * mkfs:
       * switch default to single profile for multi-device filesystem, up to
         now it was raid0 that may not be simple to convert to some other profile
@@ -1011,10 +1003,10 @@ btrfs-progs-5.9 (2020-10-23)
          * print .so versions of libraries in configure summary
 
 btrfs-progs-5.8 (skipped)
--------------------------
+"""""""""""""""""""""""""
 
 btrfs-progs-5.7 (2020-07-02)
-----------------------------
+""""""""""""""""""""""""""""
    * mkfs:
       * new option to enable features otherwise enabled at runtime, now
         implemented for quotas, 'mkfs.btrfs -R quota'
@@ -1038,7 +1030,7 @@ btrfs-progs-5.7 (2020-07-02)
       * new tests
 
 btrfs-progs-5.6 (2020-04-05)
-----------------------------
+""""""""""""""""""""""""""""
    * inspect logical-resolve: support LOGICAL_INO_V2 as new option '-o',
      helps advanced dedupe tools
    * inspect: user larger buffer (64K) for results
@@ -1067,7 +1059,6 @@ btrfs-progs-5.6 (2020-04-05)
       * many typos fixed
 
 btrfs-progs-5.6.1 (2020-05-07)
-""""""""""""""""""""""""""""""
    * print warning when multiple block group profiles exist, update 'fi usage'
      summary, add docs to manual page explaining the situation
    * build: optional support for libgcrypt or libsodium, providing hash
@@ -1078,10 +1069,10 @@ btrfs-progs-5.6.1 (2020-05-07)
       * updated docs
 
 btrfs-progs-5.5 (skipped)
--------------------------
+"""""""""""""""""""""""""
 
 btrfs-progs-5.4 (2019-12-03)
-----------------------------
+""""""""""""""""""""""""""""
    * support new hash algorithms (kernel 5.5):
       * mkfs.btrfs and btrfs-convert with --csum, crc32c, xxhash, sha256, blake2
    * mkfs: support new raid1c3 and raid1c4 block group profiles (kernel 5.5)
@@ -1103,14 +1094,13 @@ btrfs-progs-5.4 (2019-12-03)
       * cleanups and refactoring
 
 btrfs-progs-5.4.1 (2020-01-09)
-""""""""""""""""""""""""""""""
    * build: fix docbook5 build
    * check: do extra verification of extent items, inode items and chunks
    * qgroup: return ENOTCONN if quotas not running (needs updated kernel)
    * other: various test fixups
 
 btrfs-progs-5.3 (2019-10-21)
-----------------------------
+""""""""""""""""""""""""""""
    * mkfs:
       * new option to specify checksum algorithm (only crc32c)
       * fix xattr enumeration
@@ -1125,11 +1115,10 @@ btrfs-progs-5.3 (2019-10-21)
       * lots of printf format fixups
 
 btrfs-progs-5.3.1 (2019-10-25)
-""""""""""""""""""""""""""""""
    * libbtrfs: fix link breakage due to missing symbols
 
 btrfs-progs-5.2 (2019-07-05)
-----------------------------
+""""""""""""""""""""""""""""
    * subvol show: print qgroup information when available
    * scrub:
       * status: show ETA, revamp the whole output
@@ -1157,7 +1146,6 @@ btrfs-progs-5.2 (2019-07-05)
       * sb-mod can modify more superblock items
 
 btrfs-progs-5.2.1 (2019-07-26)
-""""""""""""""""""""""""""""""
    * scrub status: fix ETA calculation after resume
    * check: fix crash when using -Q
    * restore: fix symlink owner restoration
@@ -1168,7 +1156,6 @@ btrfs-progs-5.2.1 (2019-07-26)
       * test updates
 
 btrfs-progs-5.2.2 (2019-09-05)
-""""""""""""""""""""""""""""""
    * check:
       * fix false report of wrong byte count for orphan inodes
       * option -E was not handled correctly
@@ -1181,7 +1168,7 @@ btrfs-progs-5.2.2 (2019-09-05)
       * doc fixups and updates
 
 btrfs-progs-5.1 (2019-05-17)
-----------------------------
+""""""""""""""""""""""""""""
    * (version 5.0 skipped)
    * check:
       * repair: flush/FUA support to avoid breaking metadata COW
@@ -1212,7 +1199,6 @@ btrfs-progs-5.1 (2019-05-17)
       * new tests
 
 btrfs-progs-5.1.1 (2019-06-11)
-""""""""""""""""""""""""""""""
    * convert and mkfs will try to use optimized crc32c
    * fi show: accept a file-backed image
    * fi show: fix possible crash when device is deleted in parallel
diff --git a/Documentation/Contributors.rst b/Documentation/Contributors.rst
index e727d7bec2..45c3d35a14 100644
--- a/Documentation/Contributors.rst
+++ b/Documentation/Contributors.rst
@@ -61,6 +61,7 @@ Statistics for 6.x series
     "6.14", "20", "114592", "167178", "147", "+3847 -1391"
     "6.15", "25", "114616", "167485", "190", "+2346 -2039"
     "6.16", "16", "114997", "168152", "222", "+4143 -3464"
+    "6.17", "27", "115015", "168409", "255", "+3082 -2823"
 
 
 Legend:
diff --git a/Documentation/Feature-by-version.rst b/Documentation/Feature-by-version.rst
index d8f402b05e..52c72b1a60 100644
--- a/Documentation/Feature-by-version.rst
+++ b/Documentation/Feature-by-version.rst
@@ -35,6 +35,9 @@ features see :doc:`Status<Status>` page.
         is logged. The information is also accessible in
         :file:`/sys/fs/btrfs/FSID/checksum`.
 
+6.1 (stable)
+------------
+
 6.1 - sysfs support to temporarily skip exact qgroup accounting
         Allow user override of qgroup accounting and make it temporarily out
         of date e.g. in case when there are several subvolumes deleted and the
@@ -93,6 +96,9 @@ features see :doc:`Status<Status>` page.
         finalizing the directory, the cache also gains significant speedups (up
         to 10x).
 
+6.6 (stable)
+------------
+
 6.7 - raid-stripe-tree
         New tree for logical mapping, allows some RAID modes for zoned mode.
 
@@ -168,7 +174,10 @@ features see :doc:`Status<Status>` page.
         reads. The direct io is still locked but this should not be mixed with
         buffered writes.
 
-6.12 - cancellable discard/TRIM
+6.12 (stable)
+-------------
+
+-6.12 - cancellable discard/TRIM
         Add more points where the discard can be interrupted by signals before
         it finishes the whole operation.
 
@@ -228,6 +237,9 @@ features see :doc:`Status<Status>` page.
         The defrag ioctl also accepts the negative zstd levels that can be set as
         mount option.
 
+6.17 (latest)
+-------------
+
 6.17 - track current commit duration in commit_stats
         Add entry to :file:`commit_stats` to detect commit stalls, for
         debugging or monitoring purposes.
@@ -276,6 +288,9 @@ features see :doc:`Status<Status>` page.
         Verify metadata blocks before submitting them to the devices. This can
         catch consistency problems or bitflips.
 
+5.4 (stable)
+------------
+
 5.5 - more checksums
         New checksum algorithms: xxhash (64b), SHA256 (256b), BLAKE2b (256b).
 
@@ -312,6 +327,9 @@ features see :doc:`Status<Status>` page.
 5.9 - FS_INFO ioctl
         Export more information: checksum type, checksum size, generation, metadata_uuid
 
+5.10 (stable)
+-------------
+
 5.10 - exclusive ops in sysfs
         Export which filesystem exclusive operation is running (balance,
         resize, device add/delete/replace, ...)
@@ -349,6 +367,9 @@ features see :doc:`Status<Status>` page.
         value *no* sets NOCOMPRESS bit while empty value resets all compression
         settings (either compression or NOCOMPRESS bit).
 
+5.15 (stable)
+-------------
+
 5.15 - fsverity
         The fs-verity is a support layer that filesystems can hook into to
         support transparent integrity and authenticity protection of read-only
diff --git a/Documentation/Kernel-by-version.rst b/Documentation/Kernel-by-version.rst
index 73e61d6590..208020be92 100644
--- a/Documentation/Kernel-by-version.rst
+++ b/Documentation/Kernel-by-version.rst
@@ -3,11 +3,8 @@ Changes (kernel/version)
 
 Summary of kernel changes for each version.
 
-6.x
----
-
 6.0 (Oct 2022)
-^^^^^^^^^^^^^^
+--------------
 
 Pull requests:
 `v6.0-rc1 <https://git.kernel.org/linus/353767e4aaeb7bc818273dfacbb01dd36a9db47a>`__,
@@ -101,7 +98,7 @@ Notable fixes:
   repair happen
 
 6.1 (Dec 2022)
-^^^^^^^^^^^^^^
+--------------
 
 Pull requests:
 `v6.1-rc1 <https://git.kernel.org/linus/76e45035348c247a70ed50eb29a9906657e4444f>`__,
@@ -186,7 +183,7 @@ Core:
   flushing, buffered write
 
 6.2 (Feb 2023)
-^^^^^^^^^^^^^^
+--------------
 
 Pull requests:
 `v6.2-rc1 <https://git.kernel.org/linus/149c51f876322d9bfbd5e2d6ffae7aff3d794384>`__,
@@ -248,7 +245,7 @@ Fixes:
 - limit number of send clones by maximum memory allocated
 
 6.3 (Apr 2023)
-^^^^^^^^^^^^^^
+--------------
 
 Pull requests:
 `v6.3-rc1 <https://git.kernel.org/linus/885ce48739189fac6645ff42d736ee0de0b5917d>`__,
@@ -312,7 +309,7 @@ Fixes:
   work queues (since 6.0)
 
 6.4 (Jun 2023)
-^^^^^^^^^^^^^^
+--------------
 
 Pull requests:
 `v6.4-rc1 <https://git.kernel.org/linus/85d7ab2463822a4ab096c0b7b59feec962552572>`__,
@@ -369,7 +366,7 @@ Core changes:
    truncating items
 
 6.5 (Aug 2023)
-^^^^^^^^^^^^^^
+--------------
 
 Pull requests:
 `v6.5-rc1 <https://git.kernel.org/linus/cc423f6337d0a5ff1906f3b3d465d28c0d1705f6>`__,
@@ -398,7 +395,7 @@ User visible changes:
    the zones are reset as needed
 
 6.6 (Oct 2023)
-^^^^^^^^^^^^^^
+--------------
 
 Pull requests:
 `v6.6-rc1 <https://git.kernel.org/linus/547635c6ac47c7556d6954935b189defe90422f7>`__,
@@ -429,7 +426,7 @@ Core:
 - v0 extent handling completely removed, deprecated long time ago
 
 6.7 (Jan 2024)
-^^^^^^^^^^^^^^
+--------------
 
 Pull requests:
 `v6.7-rc1 <https://git.kernel.org/linus/d5acbc60fafbe0fc94c552ce916dd592cd4c6371>`__,
@@ -504,7 +501,7 @@ Core changes:
   devices), this allows temp_fsid to work
 
 6.8 (Mar 2024)
-^^^^^^^^^^^^^^
+--------------
 
 Pull requests:
 `v6.8-rc1 <https://git.kernel.org/linus/affc5af36bbb62073b6aaa4f4459b38937ff5331>`__,
@@ -563,7 +560,7 @@ Fixes:
   create chunks that would not be allowed on sequential zones
 
 6.9 (May 2024)
-^^^^^^^^^^^^^^
+--------------
 
 Pull requests:
 `v6.9-rc1 (1) <https://git.kernel.org/linus/43a7548e28a6df12a6170421d9d016c576010baa>`__,
@@ -603,7 +600,7 @@ Other notable changes:
 - additional validation of devices by major:minor numbers
 
 6.10 (Jul 2024)
-^^^^^^^^^^^^^^^
+---------------
 
 Pull requests:
 `v6.10-rc1 (1) <https://git.kernel.org/linus/a3d1f54d7aa4c3be2c6a10768d4ffa1dcb620da9>`__,
@@ -638,7 +635,7 @@ Notable fixes or changes:
 - extent map shrinker, allow memory consumption reduction for direct io loads
 
 6.11 (Sep 2024)
-^^^^^^^^^^^^^^^
+---------------
 
 Pull requests:
 `v6.11-rc1 (1) <https://git.kernel.org/linus/a1b547f0f217cfb06af7eb4ce8488b02d83a0370>`__,
@@ -701,7 +698,7 @@ Other notable changes or fixes:
 - in zoned mode, detect unexpected zone write pointer change
 
 6.12 (Nov 2024)
-^^^^^^^^^^^^^^^
+---------------
 
 Pull requests:
 `v6.12-rc1 <https://git.kernel.org/linus/7a40974fd0efa3698de4c6d1d0ee0436bcc4445d>`__,
@@ -742,7 +739,7 @@ Cleanups and refactoring:
 - introduce auto free for btrfs_path structure, use for the simple cases
 
 6.13 (Jan 2025)
-^^^^^^^^^^^^^^^
+---------------
 
 Pull requests:
 `v6.13-rc1 <https://git.kernel.org/linus/c14a8a4c04c5859322eb5801db662b56b2294f67>`__,
@@ -811,7 +808,7 @@ Core changes:
   - lockdep assertions
 
 6.14 (Mar 2025)
-^^^^^^^^^^^^^^^
+---------------
 
 Pull requests:
 `v6.14-rc1 <https://git.kernel.org/linus/0eb4aaa230d725fa9b1cd758c0f17abca5597af6>`__,
@@ -881,7 +878,7 @@ Core:
   - code moved to new files
 
 6.15 (May 2025)
-^^^^^^^^^^^^^^^
+---------------
 
 Pull requests:
 `v6.15-rc1 <https://git.kernel.org/linus/fd71def6d9abc5ae362fb9995d46049b7b0ed391>`__,
@@ -947,7 +944,7 @@ Core:
 - more preparations for large folio support
 
 6.16 (Jul 2025)
-^^^^^^^^^^^^^^^
+---------------
 
 `v6.16-rc1 <https://git.kernel.org/linus/5e82ed5ca4b510e0ff53af1e12e94e6aa1fe5a93>`__,
 `v6.16-rc1 <https://git.kernel.org/linus/a56baa225308e697163e74bae0cc623a294073d4>`__,
diff --git a/Documentation/Status.rst b/Documentation/Status.rst
index b4c9e3aaff..63e13643d2 100644
--- a/Documentation/Status.rst
+++ b/Documentation/Status.rst
@@ -481,8 +481,8 @@ Until kernel 6.12 the *CONFIG_OPTION_DEBUG* was used to hide features that
 still need some work and should not be exposed to users in general. With
 the increasing number of such features or functionality this started to conflict
 with regular debugging features. Currently the following is behind
-the experimental option. Use with caution and if you find problems or have
-feedback please report that to the mailing list.
+the experimental option *CONFIG_BTRFS_EXPERIMENTAL*. Use with caution and if
+you find problems or have feedback please report that to the mailing list.
 
 .. list-table::
    :header-rows: 1
@@ -511,3 +511,6 @@ feedback please report that to the mailing list.
    * - Extent tree v2
      - ...
      - Incomplete implementation.
+   * - Large folio support
+     - ...
+     -
diff --git a/Documentation/btrfs-device.rst b/Documentation/btrfs-device.rst
index 1a42b96339..8ade55c6dc 100644
--- a/Documentation/btrfs-device.rst
+++ b/Documentation/btrfs-device.rst
@@ -124,22 +124,36 @@ scan [options] [<device> [<device>...]]
                 Unregister a given device or all stale devices if no path is given, the device
                 must be unmounted otherwise it's an error.
 
-stats [options] <path>|<device>
+stats [options] <path>|<device>|<file>
         Read and print the device IO error statistics for all devices of the given
-        filesystem identified by *path* or for a single *device*. The filesystem must
-        be mounted.  See section :ref:`DEVICE STATS<man-device-device-stats>`
-        for more information about the reported statistics and the meaning.
+        filesystem identified by *path* or for a single *device* or *file* (the
+        offline mode, unmounted filesystem).
+
+        When the filesystem is mounted the *path* is expected to be a directory
+        and the stats are read using an ioctl and can be reset or checked. Same
+        for a block *device* of a mounted filesystem.
+
+        For an offline mode the path must be a file image or a block device,
+        the option *--offline* is mandatory. As it's read-only access the
+        option *--reset* does not work.
+
+        See section :ref:`DEVICE STATS<man-device-device-stats>` for more
+        information about the reported statistics and the meaning.
 
         ``Options``
 
         -z|--reset
-                Print the stats and reset the values to zero afterwards.
+                Print the stats and reset the values to zero afterwards. Does
+                not work in offline mode.
 
         -c|--check
                 Check if the stats are all zeros and return 0 if it is so. Set bit 6 of the
                 return code if any of the statistics is no-zero. The error values is 65 if
                 reading stats from at least one device failed, otherwise it's 64.
 
+        --offline
+                Read the stats from the file image or directly from block device.
+
         -T
                 Print stats in a tabular form, devices as rows and stats as columns
 
@@ -230,7 +244,7 @@ filesystem lifetime or from a scrub run.
 write_io_errs
         Failed writes to the block devices, means that the layers beneath the
         filesystem were not able to satisfy the write request.
-read_io_errors
+read_io_errs
         Read request analogy to write_io_errs.
 flush_io_errs
         Number of failed writes with the *FLUSH* flag set. The flushing is a method of
diff --git a/Documentation/btrfs-filesystem.rst b/Documentation/btrfs-filesystem.rst
index 146d88b65b..5a964146f1 100644
--- a/Documentation/btrfs-filesystem.rst
+++ b/Documentation/btrfs-filesystem.rst
@@ -240,10 +240,8 @@ resize [options] [<devid>:][+/-]<size>[kKmMgGtTpPeE]|[<devid>:]max <path>
         Resize a mounted filesystem identified by *path*. A particular device
         can be resized by specifying a *devid*.
 
-        .. warning::
-                If *path* is a file containing a BTRFS image then resize does not work
-                as expected and does not resize the image. This would resize the underlying
-                filesystem instead.
+        .. note::
+                To resize a file containing a BTRFS image, please use the --offline flag.
 
         The *devid* can be found in the output of :command:`btrfs filesystem show` and
         defaults to 1 if not specified.
@@ -290,6 +288,18 @@ resize [options] [<devid>:][+/-]<size>[kKmMgGtTpPeE]|[<devid>:]max <path>
 
         --enqueue
                 wait if there's another exclusive operation running, otherwise continue
+        --offline
+                resize an unmounted (offline) filesystem
+
+                .. warning:: The offline resize functionality currently
+                        supports **only increasing** the size of **single-device**
+                        filesystems.  IOW, shrinking and multi-device filesystems are
+                        **not supported** with this option.
+
+                For filesystems stored in regular files, the file will be
+                truncated to the new size as part of the resize operation.
+                This flag is cannot be used together with with --enqueue since
+                offline resizing is synchronous.
 
 show [options] [<path>|<uuid>|<device>|<label>]
         Show the btrfs filesystem with some additional info about devices and space
@@ -324,6 +334,26 @@ show [options] [<path>|<uuid>|<device>|<label>]
         --tbytes
                 show sizes in TiB, or TB with --si
 
+commit-stats
+        Print number of commits and time stats since mount. This is also available
+        in :file:`/sys/fs/btrfs/FSID/commit_stats`. The stats are not persistent
+        and are collected since mount of the filesystem, one of them can be reset
+        to zero (*Max commit duration*).
+
+        .. code-block:: none
+
+		UUID: bd18ebe1-7e1d-414f-a3d5-2644388b51cc
+		Commit stats since mount:
+		  Total commits:                  1133
+		  Last commit duration:              0ms
+		  Max commit duration:              10ms
+		  Total time spent in commit:     4543ms
+
+        ``Options``
+
+        -z|--reset
+                print stats and reset 'max_commit_ms' (needs root)
+
 sync <path>
         Force a sync of the filesystem at *path*, similar to the :manref:`sync(1)` command. In
         addition, it starts cleaning of deleted subvolumes. To wait for the subvolume
diff --git a/Documentation/btrfs-ioctl.rst b/Documentation/btrfs-ioctl.rst
index a3d1353e9d..77d20e6eb9 100644
--- a/Documentation/btrfs-ioctl.rst
+++ b/Documentation/btrfs-ioctl.rst
@@ -17,6 +17,241 @@ over time and in some cases get promoted to a VFS-level ioctl once other
 filesystems adopt the functionality. Backward compatibility is maintained
 and a formerly private ioctl number could become available on the VFS level.
 
+OVERVIEW
+--------
+
+The ioctls are defined by a number and associated with a data structure that
+contains further information. All ioctls use file descriptor (*fd*) as a reference
+point, it could be the filesystem or a directory inside the filesystem.
+
+An ioctl can be used in the following schematic way:
+
+.. code-block:: c
+
+   struct btrfs_ioctl_args args;
+
+   memset(&args, 0, sizeof(args));
+   args.key = value;
+   ret = ioctl(fd, BTRFS_IOC_NUMBER, &args);
+
+The *fd* is the entry point to the filesystem and for most ioctls it does not
+matter which directory is that. A distinction between files and directories sometimes
+matter, when it matters it's explicitly mentioned. The *args* is the
+associated data structure for the request. It's strongly recommended to
+initialize the whole structure to zeros as this is future-proof when the ioctl
+gets further extensions. Not doing that could lead to mismatch of old userspace
+and new kernel versions, or vice versa.  The *BTRFS_IOC_NUMBER* is says which
+operation should be done on the given arguments. Some ioctls take a specific
+data structure, some of them share a common one, no argument structure ioctls
+exist too.  The data passed to an ioctl can be input, output or both.
+
+The library *libbtrfsutil* wraps a few ioctls for convenience. Using raw ioctls
+is not discouraged but may be cumbersome though it does not need additional
+library dependency. Backward compatibility is guaranteed and incompatible
+changes usually lead to a new version of the ioctl. Enhancements of existing
+ioctls can happen and depend on additional flags to be set. Zeroed unused
+space is commonly understood as a mechanism to communicate the compatibility
+between kernel and userspace and thus *zeroing is really important*. In exceptional
+cases this is not enough and further flags need to be passed to distinguish
+between zero as implicit unused initialization and a valid zero value. Such
+cases are documented.
+
+File descriptors of regular files are obtained by ``int fd = open()``, directories
+opened as ``DIR *dir = opendir()`` can be converted to the corresponding
+file descriptor by ``fd = dirfd(dir)``.
+
+LIST OF IOCTLS
+--------------
+
+.. list-table::
+   :header-rows: 1
+
+   * - Name
+     - Description
+     - Data
+   * - :ref:`BTRFS_IOC_SNAP_CREATE<BTRFS_IOC_SNAP_CREATE>`
+     - (obsolete) create a snapshot of a subvolume
+     - :ref:`struct btrfs_ioctl_vol_args<struct_btrfs_ioctl_vol_args>`
+   * - BTRFS_IOC_DEFRAG
+     -
+     -
+   * - BTRFS_IOC_RESIZE
+     -
+     -
+   * - :ref:`BTRFS_IOC_SCAN_DEV<BTRFS_IOC_SCAN_DEV>`
+     - scan and register a given device path with filesystem module
+     - :ref:`struct btrfs_ioctl_vol_args<struct_btrfs_ioctl_vol_args>`
+   * - :ref:`BTRFS_IOC_SYNC<BTRFS_IOC_SYNC>`
+     - Sync the filesystem, possibly process queued up work
+     - NULL
+   * - BTRFS_IOC_CLONE
+     -
+     -
+   * - :ref:`BTRFS_IOC_ADD_DEV<BTRFS_IOC_ADD_DEV>`
+     - add a device to the filesystem by path
+     - :ref:`struct btrfs_ioctl_vol_args<struct_btrfs_ioctl_vol_args>`
+   * - :ref:`BTRFS_IOC_RM_DEV<BTRFS_IOC_RM_DEV>`
+     - delete a device from the filesystem by path
+     - :ref:`struct btrfs_ioctl_vol_args<struct_btrfs_ioctl_vol_args>`
+   * - BTRFS_IOC_BALANCE
+     -
+     -
+   * - BTRFS_IOC_CLONE_RANGE
+     -
+     -
+   * - :ref:`BTRFS_IOC_SUBVOL_CREATE<BTRFS_IOC_SUBVOL_CREATE>`
+     - (obsolete) create a subvolume
+     - :ref:`struct btrfs_ioctl_vol_args<struct_btrfs_ioctl_vol_args>`
+   * - :ref:`BTRFS_IOC_SNAP_DESTROY<BTRFS_IOC_SNAP_DESTROY>`
+     - (obsolete) delete a subvolume
+     - :ref:`struct btrfs_ioctl_vol_args<struct_btrfs_ioctl_vol_args>`
+   * - BTRFS_IOC_DEFRAG_RANGE
+     -
+     -
+   * - BTRFS_IOC_TREE_SEARCH
+     -
+     -
+   * - BTRFS_IOC_TREE_SEARCH_V2
+     -
+     -
+   * - :ref:`BTRFS_IOC_INO_LOOKUP<BTRFS_IOC_INO_LOOKUP>`
+     - resolve inode number to path, or lookup containing subvolume id
+     - :ref:`struct btrfs_ioctl_ino_lookup_args<struct_btrfs_ioctl_ino_lookup_args>`
+   * - :ref:`BTRFS_IOC_DEFAULT_SUBVOL<BTRFS_IOC_DEFAULT_SUBVOL>`
+     - set the default subvolume id
+     - uint64_t
+   * - BTRFS_IOC_SPACE_INFO
+     -
+     -
+   * - BTRFS_IOC_START_SYNC
+     -
+     -
+   * - BTRFS_IOC_WAIT_SYNC
+     -
+     -
+   * - :ref:`BTRFS_IOC_SNAP_CREATE_V2<BTRFS_IOC_SNAP_CREATE_V2>`
+     - create a snapshot of a subvolume
+     - :ref:`struct btrfs_ioctl_vol_args_v2<struct_btrfs_ioctl_vol_args_v2>`
+   * - :ref:`BTRFS_IOC_SUBVOL_CREATE_V2<BTRFS_IOC_SUBVOL_CREATE_V2>`
+     - create a subvolume
+     - :ref:`struct btrfs_ioctl_vol_args_v2<struct_btrfs_ioctl_vol_args_v2>`
+   * - :ref:`BTRFS_IOC_SUBVOL_GETFLAGS<BTRFS_IOC_SUBVOL_GETFLAGS>`
+     - get flags of a subvolume
+     - uint64_t
+   * - :ref:`BTRFS_IOC_SUBVOL_SETFLAGS<BTRFS_IOC_SUBVOL_SETFLAGS>`
+     - set flags of a subvolume
+     - uint64_t
+   * - BTRFS_IOC_SCRUB
+     -
+     -
+   * - BTRFS_IOC_SCRUB_CANCEL
+     -
+     -
+   * - BTRFS_IOC_SCRUB_PROGRESS
+     -
+     -
+   * - :ref:`BTRFS_IOC_DEV_INFO<BTRFS_IOC_DEV_INFO>`
+     - get information about a device (UUIDs, used size, total size)
+     - :ref:`struct btrfs_ioctl_dev_info_args<struct_btrfs_ioctl_dev_info_args>`
+   * - :ref:`BTRFS_IOC_FS_INFO<BTRFS_IOC_FS_INFO>`
+     - get information about filesystem (device count, fsid, ...)
+     - :ref:`struct btrfs_ioctl_fs_info_args<struct_btrfs_ioctl_fs_info_args>`
+   * - BTRFS_IOC_BALANCE_V2
+     -
+     -
+   * - BTRFS_IOC_BALANCE_CTL
+     -
+     -
+   * - BTRFS_IOC_BALANCE_PROGRESS
+     -
+     -
+   * - BTRFS_IOC_INO_PATHS
+     -
+     -
+   * - BTRFS_IOC_LOGICAL_INO
+     -
+     -
+   * - BTRFS_IOC_SET_RECEIVED_SUBVOL
+     -
+     -
+   * - BTRFS_IOC_SEND
+     -
+     -
+   * - BTRFS_IOC_DEVICES_READY
+     -
+     -
+   * - BTRFS_IOC_QUOTA_CTL
+     -
+     -
+   * - BTRFS_IOC_QGROUP_ASSIGN
+     -
+     -
+   * - BTRFS_IOC_QGROUP_CREATE
+     -
+     -
+   * - BTRFS_IOC_QGROUP_LIMIT
+     -
+     -
+   * - BTRFS_IOC_QUOTA_RESCAN
+     -
+     -
+   * - BTRFS_IOC_QUOTA_RESCAN_STATUS
+     -
+     -
+   * - BTRFS_IOC_QUOTA_RESCAN_WAIT
+     -
+     -
+   * - :ref:`BTRFS_IOC_GET_FSLABEL<BTRFS_IOC_GET_FSLABEL>`
+     - read filesystem label
+     - char buffer[:ref:`BTRFS_LABEL_SIZE<constants-table>`]
+   * - :ref:`BTRFS_IOC_SET_FSLABEL<BTRFS_IOC_SET_FSLABEL>`
+     - set the filesystem label
+     - char buffer[:ref:`BTRFS_LABEL_SIZE<constants-table>`]
+   * - BTRFS_IOC_GET_DEV_STATS
+     -
+     -
+   * - BTRFS_IOC_DEV_REPLACE
+     -
+     -
+   * - BTRFS_IOC_FILE_EXTENT_SAME
+     -
+     -
+   * - :ref:`BTRFS_IOC_GET_FEATURES<BTRFS_IOC_GET_FEATURES>`
+     - get features set on the filesystem
+     - :ref:`struct btrfs_ioctl_feature_flags<struct_btrfs_ioctl_feature_flags>`
+   * - :ref:`BTRFS_IOC_SET_FEATURES<BTRFS_IOC_SET_FEATURES>`
+     - set features on the filesystem
+     - :ref:`struct btrfs_ioctl_feature_flags<struct_btrfs_ioctl_feature_flags>`
+   * - :ref:`BTRFS_IOC_GET_SUPPORTED_FEATURES<BTRFS_IOC_GET_SUPPORTED_FEATURES>`
+     - get available filesystem feature sets
+     - :ref:`struct btrfs_ioctl_feature_flags[3]<struct_btrfs_ioctl_feature_flags>`
+   * - BTRFS_IOC_RM_DEV_V2
+     -
+     -
+   * - BTRFS_IOC_LOGICAL_INO_V2
+     -
+     -
+   * - :ref:`BTRFS_IOC_GET_SUBVOL_INFO<BTRFS_IOC_GET_SUBVOL_INFO>`
+     - get information about a subvolume
+     - :ref:`struct btrfs_ioctl_get_subvol_info_args<struct_btrfs_ioctl_get_subvol_info_args>`
+   * - BTRFS_IOC_GET_SUBVOL_ROOTREF
+     -
+     -
+   * - BTRFS_IOC_INO_LOOKUP_USER
+     -
+     -
+   * - :ref:`BTRFS_IOC_SNAP_DESTROY_V2<BTRFS_IOC_SNAP_DESTROY_V2>`
+     - destroy a (snapshot or regular) subvolume
+     - :ref:`struct btrfs_ioctl_vol_args_v2<struct_btrfs_ioctl_vol_args_v2>`
+   * - BTRFS_IOC_ENCODED_READ
+     -
+     -
+   * - BTRFS_IOC_ENCODED_WRITE
+     -
+     -
+   * - :ref:`BTRFS_IOC_SUBVOL_SYNC_WAIT<BTRFS_IOC_SUBVOL_SYNC_WAIT>`
+     - Wait until a deleted subvolume is cleaned or query the state.
+     - :ref:`struct btrfs_ioctl_subvol_wait<struct_btrfs_ioctl_subvol_wait>`
 
 DATA STRUCTURES AND DEFINITIONS
 -------------------------------
@@ -57,6 +292,48 @@ DATA STRUCTURES AND DEFINITIONS
                 };
         };
 
+
+.. _struct_btrfs_ioctl_feature_flags:
+
+.. code-block:: c
+
+	#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE         (1ULL << 0)
+	/*
+	 * Older kernels (< 4.9) on big-endian systems produced broken free space tree
+	 * bitmaps, and btrfs-progs also used to corrupt the free space tree (versions
+	 * < 4.7.3).  If this bit is clear, then the free space tree cannot be trusted.
+	 * btrfs-progs can also intentionally clear this bit to ask the kernel to
+	 * rebuild the free space tree, however this might not work on older kernels
+	 * that do not know about this bit. If not sure, clear the cache manually on
+	 * first mount when booting older kernel versions.
+	 */
+	#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID   (1ULL << 1)
+	#define BTRFS_FEATURE_COMPAT_RO_VERITY                  (1ULL << 2)
+	#define BTRFS_FEATURE_COMPAT_RO_BLOCK_GROUP_TREE        (1ULL << 3)
+
+	#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF            (1ULL << 0)
+	#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL           (1ULL << 1)
+	#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS             (1ULL << 2)
+	#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO             (1ULL << 3)
+	#define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD            (1ULL << 4)
+	#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA             (1ULL << 5)
+	#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF            (1ULL << 6)
+	#define BTRFS_FEATURE_INCOMPAT_RAID56                   (1ULL << 7)
+	#define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA          (1ULL << 8)
+	#define BTRFS_FEATURE_INCOMPAT_NO_HOLES                 (1ULL << 9)
+	#define BTRFS_FEATURE_INCOMPAT_METADATA_UUID            (1ULL << 10)
+	#define BTRFS_FEATURE_INCOMPAT_RAID1C34                 (1ULL << 11)
+	#define BTRFS_FEATURE_INCOMPAT_ZONED                    (1ULL << 12)
+	#define BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2           (1ULL << 13)
+	#define BTRFS_FEATURE_INCOMPAT_RAID_STRIPE_TREE         (1ULL << 14)
+	#define BTRFS_FEATURE_INCOMPAT_SIMPLE_QUOTA             (1ULL << 16)
+
+        struct btrfs_ioctl_feature_flags {
+                __u64 compat_flags;
+                __u64 compat_ro_flags;
+                __u64 incompat_flags;
+        };
+
 .. _struct_btrfs_ioctl_get_subvol_info_args:
 
 .. code-block:: c
@@ -150,6 +427,29 @@ DATA STRUCTURES AND DEFINITIONS
 		__u64 rsv_excl;
 	};
 
+.. _struct_btrfs_ioctl_dev_info_args:
+
+.. code-block:: c
+
+        struct btrfs_ioctl_dev_info_args {
+             __u64 devid;                            /* in/out */
+             __u8 uuid[BTRFS_UUID_SIZE];             /* in/out */
+             __u64 bytes_used;                       /* out */
+             __u64 total_bytes;                      /* out */
+             /*
+              * Optional, out.
+              *
+              * Showing the fsid of the device, allowing user space to check if this
+              * device is a seeding one.
+              *
+              * Introduced in v6.3, thus user space still needs to check if kernel
+              * changed this value.  Older kernel will not touch the values here.
+              */
+             __u8 fsid[BTRFS_UUID_SIZE];
+             __u64 unused[377];                      /* pad to 4k */
+             __u8 path[BTRFS_DEVICE_PATH_NAME_MAX];  /* out */
+        };
+
 .. _struct_btrfs_ioctl_fs_info_args:
 
 .. code-block:: c
@@ -235,241 +535,6 @@ DATA STRUCTURES AND DEFINITIONS
    * - BTRFS_FIRST_FREE_OBJECTID
      - 256
 
-OVERVIEW
---------
-
-The ioctls are defined by a number and associated with a data structure that
-contains further information. All ioctls use file descriptor (fd) as a reference
-point, it could be the filesystem or a directory inside the filesystem.
-
-An ioctl can be used in the following schematic way:
-
-.. code-block:: c
-
-   struct btrfs_ioctl_args args;
-
-   memset(&args, 0, sizeof(args));
-   args.key = value;
-   ret = ioctl(fd, BTRFS_IOC_NUMBER, &args);
-
-The 'fd' is the entry point to the filesystem and for most ioctls it does not
-matter which file or directory is that. Where it matters it's explicitly
-mentioned. The 'args' is the associated data structure for the request. It's
-strongly recommended to initialize the whole structure to zeros as this is
-future-proof when the ioctl gets further extensions. Not doing that could lead
-to mismatch of old userspace and new kernel versions, or vice versa.
-The 'BTRFS_IOC_NUMBER' is says which operation should be done on the given
-arguments. Some ioctls take a specific data structure, some of them share a
-common one, no argument structure ioctls exist too.
-
-The library *libbtrfsutil* wraps a few ioctls for convenience. Using raw ioctls
-is not discouraged but may be cumbersome though it does not need additional
-library dependency. Backward compatibility is guaranteed and incompatible
-changes usually lead to a new version of the ioctl. Enhancements of existing
-ioctls can happen and depend on additional flags to be set. Zeroed unused
-space is commonly understood as a mechanism to communicate the compatibility
-between kernel and userspace and thus *zeroing is really important*. In exceptional
-cases this is not enough and further flags need to be passed to distinguish
-between zero as implicit unused initialization and a valid zero value. Such
-cases are documented.
-
-File descriptors of regular files are obtained by ``int fd = open()``, directories
-opened as ``DIR *dir = opendir()`` can be converted to the corresponding
-file descriptor by ``fd = dirfd(dir)``.
-
-LIST OF IOCTLS
---------------
-
-.. list-table::
-   :header-rows: 1
-
-   * - Name
-     - Description
-     - Data
-   * - :ref:`BTRFS_IOC_SNAP_CREATE<BTRFS_IOC_SNAP_CREATE>`
-     - (obsolete) create a snapshot of a subvolume
-     - :ref:`struct btrfs_ioctl_vol_args<struct_btrfs_ioctl_vol_args>`
-   * - BTRFS_IOC_DEFRAG
-     -
-     -
-   * - BTRFS_IOC_RESIZE
-     -
-     -
-   * - :ref:`BTRFS_IOC_SCAN_DEV<BTRFS_IOC_SCAN_DEV>`
-     - scan and register a given device path with filesystem module
-     - :ref:`struct btrfs_ioctl_vol_args<struct_btrfs_ioctl_vol_args>`
-   * - :ref:`BTRFS_IOC_SYNC<BTRFS_IOC_SYNC>`
-     - Sync the filesystem, possibly process queued up work
-     - NULL
-   * - BTRFS_IOC_CLONE
-     -
-     -
-   * - :ref:`BTRFS_IOC_ADD_DEV<BTRFS_IOC_ADD_DEV>`
-     - add a device to the filesystem by path
-     - :ref:`struct btrfs_ioctl_vol_args<struct_btrfs_ioctl_vol_args>`
-   * - :ref:`BTRFS_IOC_RM_DEV<BTRFS_IOC_RM_DEV>`
-     - delete a device from the filesystem by path
-     - :ref:`struct btrfs_ioctl_vol_args<struct_btrfs_ioctl_vol_args>`
-   * - BTRFS_IOC_BALANCE
-     -
-     -
-   * - BTRFS_IOC_CLONE_RANGE
-     -
-     -
-   * - :ref:`BTRFS_IOC_SUBVOL_CREATE<BTRFS_IOC_SUBVOL_CREATE>`
-     - (obsolete) create a subvolume
-     - :ref:`struct btrfs_ioctl_vol_args<struct_btrfs_ioctl_vol_args>`
-   * - :ref:`BTRFS_IOC_SNAP_DESTROY<BTRFS_IOC_SNAP_DESTROY>`
-     - (obsolete) delete a subvolume
-     - :ref:`struct btrfs_ioctl_vol_args<struct_btrfs_ioctl_vol_args>`
-   * - BTRFS_IOC_DEFRAG_RANGE
-     -
-     -
-   * - BTRFS_IOC_TREE_SEARCH
-     -
-     -
-   * - BTRFS_IOC_TREE_SEARCH_V2
-     -
-     -
-   * - :ref:`BTRFS_IOC_INO_LOOKUP<BTRFS_IOC_INO_LOOKUP>`
-     - resolve inode number to path, or lookup containing subvolume id
-     - :ref:`struct btrfs_ioctl_ino_lookup_args<struct_btrfs_ioctl_ino_lookup_args>`
-   * - :ref:`BTRFS_IOC_DEFAULT_SUBVOL<BTRFS_IOC_DEFAULT_SUBVOL>`
-     - set the default subvolume id
-     - uint64_t
-   * - BTRFS_IOC_SPACE_INFO
-     -
-     -
-   * - BTRFS_IOC_START_SYNC
-     -
-     -
-   * - BTRFS_IOC_WAIT_SYNC
-     -
-     -
-   * - :ref:`BTRFS_IOC_SNAP_CREATE_V2<BTRFS_IOC_SNAP_CREATE_V2>`
-     - create a snapshot of a subvolume
-     - :ref:`struct btrfs_ioctl_vol_args_v2<struct_btrfs_ioctl_vol_args_v2>`
-   * - :ref:`BTRFS_IOC_SUBVOL_CREATE_V2<BTRFS_IOC_SUBVOL_CREATE_V2>`
-     - create a subvolume
-     - :ref:`struct btrfs_ioctl_vol_args_v2<struct_btrfs_ioctl_vol_args_v2>`
-   * - :ref:`BTRFS_IOC_SUBVOL_GETFLAGS<BTRFS_IOC_SUBVOL_GETFLAGS>`
-     - get flags of a subvolume
-     - uint64_t
-   * - :ref:`BTRFS_IOC_SUBVOL_SETFLAGS<BTRFS_IOC_SUBVOL_SETFLAGS>`
-     - set flags of a subvolume
-     - uint64_t
-   * - BTRFS_IOC_SCRUB
-     -
-     -
-   * - BTRFS_IOC_SCRUB_CANCEL
-     -
-     -
-   * - BTRFS_IOC_SCRUB_PROGRESS
-     -
-     -
-   * - BTRFS_IOC_DEV_INFO
-     -
-     -
-   * - :ref:`BTRFS_IOC_FS_INFO<BTRFS_IOC_FS_INFO>`
-     - get information about filesystem (device count, fsid, ...)
-     - :ref:`struct btrfs_ioctl_fs_info_args<struct_btrfs_ioctl_fs_info_args>`
-   * - BTRFS_IOC_BALANCE_V2
-     -
-     -
-   * - BTRFS_IOC_BALANCE_CTL
-     -
-     -
-   * - BTRFS_IOC_BALANCE_PROGRESS
-     -
-     -
-   * - BTRFS_IOC_INO_PATHS
-     -
-     -
-   * - BTRFS_IOC_LOGICAL_INO
-     -
-     -
-   * - BTRFS_IOC_SET_RECEIVED_SUBVOL
-     -
-     -
-   * - BTRFS_IOC_SEND
-     -
-     -
-   * - BTRFS_IOC_DEVICES_READY
-     -
-     -
-   * - BTRFS_IOC_QUOTA_CTL
-     -
-     -
-   * - BTRFS_IOC_QGROUP_ASSIGN
-     -
-     -
-   * - BTRFS_IOC_QGROUP_CREATE
-     -
-     -
-   * - BTRFS_IOC_QGROUP_LIMIT
-     -
-     -
-   * - BTRFS_IOC_QUOTA_RESCAN
-     -
-     -
-   * - BTRFS_IOC_QUOTA_RESCAN_STATUS
-     -
-     -
-   * - BTRFS_IOC_QUOTA_RESCAN_WAIT
-     -
-     -
-   * - :ref:`BTRFS_IOC_GET_FSLABEL<BTRFS_IOC_GET_FSLABEL>`
-     - read filesystem label
-     - char buffer[:ref:`BTRFS_LABEL_SIZE<constants-table>`]
-   * - :ref:`BTRFS_IOC_SET_FSLABEL<BTRFS_IOC_SET_FSLABEL>`
-     - set the filesystem label
-     - char buffer[:ref:`BTRFS_LABEL_SIZE<constants-table>`]
-   * - BTRFS_IOC_GET_DEV_STATS
-     -
-     -
-   * - BTRFS_IOC_DEV_REPLACE
-     -
-     -
-   * - BTRFS_IOC_FILE_EXTENT_SAME
-     -
-     -
-   * - BTRFS_IOC_GET_FEATURES
-     -
-     -
-   * - BTRFS_IOC_SET_FEATURES
-     -
-     -
-   * - BTRFS_IOC_GET_SUPPORTED_FEATURES
-     -
-     -
-   * - BTRFS_IOC_RM_DEV_V2
-     -
-     -
-   * - BTRFS_IOC_LOGICAL_INO_V2
-     -
-     -
-   * - :ref:`BTRFS_IOC_GET_SUBVOL_INFO<BTRFS_IOC_GET_SUBVOL_INFO>`
-     - get information about a subvolume
-     - :ref:`struct btrfs_ioctl_get_subvol_info_args<struct_btrfs_ioctl_get_subvol_info_args>`
-   * - BTRFS_IOC_GET_SUBVOL_ROOTREF
-     -
-     -
-   * - BTRFS_IOC_INO_LOOKUP_USER
-     -
-     -
-   * - :ref:`BTRFS_IOC_SNAP_DESTROY_V2<BTRFS_IOC_SNAP_DESTROY_V2>`
-     - destroy a (snapshot or regular) subvolume
-     - :ref:`struct btrfs_ioctl_vol_args_v2<struct_btrfs_ioctl_vol_args_v2>`
-   * - BTRFS_IOC_ENCODED_READ
-     -
-     -
-   * - BTRFS_IOC_ENCODED_WRITE
-     -
-     -
-   * - :ref:`BTRFS_IOC_SUBVOL_SYNC_WAIT<BTRFS_IOC_SUBVOL_SYNC_WAIT>`
-     - Wait until a deleted subvolume is cleaned or query the state.
-     - :ref:`struct btrfs_ioctl_subvol_wait<struct_btrfs_ioctl_subvol_wait>`
-
 DETAILED DESCRIPTION
 --------------------
 
@@ -850,6 +915,23 @@ Required permissions: CAP_SYS_ADMIN
    * - ioctl args
      - char buffer[:ref:`BTRFS_LABEL_SIZE<constants-table>`]
 
+.. _BTRFS_IOC_DEV_INFO:
+
+BTRFS_IOC_DEV_INFO
+~~~~~~~~~~~~~~~~~~
+
+Read some basic information about a device, requested by the *devid* or *device UUID*.
+
+.. list-table::
+   :header-rows: 1
+
+   * - Field
+     - Description
+   * - ioctl fd
+     - file descriptor of any file/directory in the filesystem
+   * - ioctl args
+     - :ref:`struct btrfs_ioctl_dev_info_args<struct_btrfs_ioctl_dev_info_args>`
+
 .. _BTRFS_IOC_FS_INFO:
 
 BTRFS_IOC_FS_INFO
@@ -870,6 +952,78 @@ depending on the flags set.
    * - ioctl args
      - :ref:`struct btrfs_ioctl_fs_info_args<struct_btrfs_ioctl_fs_info_args>`
 
+.. _BTRFS_IOC_GET_FEATURES:
+
+BTRFS_IOC_GET_FEATURES
+~~~~~~~~~~~~~~~~~~~~~~
+
+Get the actually set feature bits on the filesystem (the bits are stored in the
+super block).  There are three sets related to backward compatibility:
+
+- incompat: not backward compatible, mount on older kernel will fail.
+- compat_ro: backward compatible for read-only mount.
+- compat: backward compatible with read-write support, only marked as as individual feature.
+
+.. list-table::
+   :header-rows: 1
+
+   * - Field
+     - Description
+   * - ioctl fd
+     - file descriptor of the subvolume to examine
+   * - ioctl args
+     - :ref:`struct btrfs_ioctl_feature_flags<struct_btrfs_ioctl_feature_flags>`
+
+If a bit is set then there may be some data structures on the filesystem of the
+related feature, but not necessarily.
+
+Some of the features are turned on automatically when used,
+e.g. compression or when a balance filter converts to yet unused block group
+profile. In some cases the feature can be turned on or off by :doc:`btrfstune`.
+
+.. _BTRFS_IOC_SET_FEATURES:
+
+BTRFS_IOC_SET_FEATURES
+~~~~~~~~~~~~~~~~~~~~~~
+
+Set a feature bit on the filesystem if possible. Some features may require
+extensive changes, new data structures or conversion (like free-space-tree).
+Bits representing possible existence of data structures related to the feature
+can be set without actually creating anything, e.g. ZSTD compressed extents.
+
+.. list-table::
+   :header-rows: 1
+
+   * - Field
+     - Description
+   * - ioctl fd
+     - file descriptor of the subvolume to examine
+   * - ioctl args
+     - :ref:`struct btrfs_ioctl_feature_flags<struct_btrfs_ioctl_feature_flags>`
+
+.. _BTRFS_IOC_GET_SUPPORTED_FEATURES:
+
+BTRFS_IOC_GET_SUPPORTED_FEATURES
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Get feature sets supported by the kernel module, in three groups:
+
+- supported: (index 0) all supported compat/compat_ro/incompat features
+- safe to set: (index 1) features that can be enabled on a mounted filesystem
+- safe to clear: (index 2) features that can be disabled on a mounted filesystem
+
+The features are also listed in :file:`/sys/fs/btrfs/features`.
+
+.. list-table::
+   :header-rows: 1
+
+   * - Field
+     - Description
+   * - ioctl fd
+     - file descriptor of the subvolume to examine
+   * - ioctl args
+     - :ref:`struct btrfs_ioctl_feature_flags[3]<struct_btrfs_ioctl_feature_flags>`
+
 .. _BTRFS_IOC_GET_SUBVOL_INFO:
 
 BTRFS_IOC_GET_SUBVOL_INFO
diff --git a/Documentation/btrfs-quota.rst b/Documentation/btrfs-quota.rst
index 9091878a66..131f9506d2 100644
--- a/Documentation/btrfs-quota.rst
+++ b/Documentation/btrfs-quota.rst
@@ -65,6 +65,29 @@ rescan [options] <path>
         -W|--wait-norescan
                 wait for rescan to finish without starting it
 
+status [options] <path>
+        Print status information about quotas if enabled on *path*. The information
+        is read from :file:`/sys/fs/btrfs/FSID/qgroups` and root privileges are
+        not needed.
+
+        Example output for quotas enabled by :command:`btrfs quota enable /mnt`:
+
+        .. code-block:: none
+
+		Quotas on /mnt:
+		  Enabled:                 yes
+		  Mode:                    qgroup (full accounting)
+		  Inconsistent:            no
+		  Override limits:         no
+		  Drop subtree threshold:  3
+		  Total count:             1
+		  Level 0:                 1
+
+        ``Options``
+
+        --is-enabled
+                only check if quotas are enabled, not not print anything
+
 EXIT STATUS
 -----------
 
diff --git a/Documentation/conf.py b/Documentation/conf.py
index cc5c4eac59..6f3c84e63a 100644
--- a/Documentation/conf.py
+++ b/Documentation/conf.py
@@ -17,7 +17,7 @@
 import pathlib
 from docutils import nodes
 from docutils.utils import unescape
-from docutils.parsers.rst import Directive, directives
+from docutils.parsers.rst import Directive
 from sphinx.util.nodes import split_explicit_title, set_source_info
 
 # -- Project information -----------------------------------------------------
diff --git a/Documentation/dev/Development-notes.rst b/Documentation/dev/Development-notes.rst
index 65b7af4e47..b2542c9da5 100644
--- a/Documentation/dev/Development-notes.rst
+++ b/Documentation/dev/Development-notes.rst
@@ -224,6 +224,9 @@ attention to detail. Once written the code could stay unchanged for years but
 will be read many times. `Read more
 <https://simpleprogrammer.com/maintaining-code/>`__.
 
+General advice: *Try to keep the same style and formatting of the code that's
+already there.*
+
 Patches
 ^^^^^^^
 
@@ -277,6 +280,8 @@ Headers
 ^^^^^^^
 
 -  leave one newline before #endif in headers
+-  include headers that add usage of a data structure or API, also remove such
+   header with last use of the API
 
 Comments
 ^^^^^^^^
@@ -330,6 +335,9 @@ Misc
 -  fix spelling, grammar and formatting of comments that get moved or changed
 -  fix coding style in code that's only moved
 -  one newline between functions
+-  80 chars per line are recommended but longer lines are OK (up to 90) if the
+   code "looks better" without the line break, e.g. if half of the word is beyond 80 chars
+   but it's clear what it is, or function prototypes do not need to wrap arguments
 
 Locking
 ^^^^^^^
@@ -346,8 +354,20 @@ Code
 -  default function return value is *int ret*, temporary return values should
    be named like *ret2* etc
 -  structure initializers should use *{ 0 }*
--  do not use *short* type if possible, if it fits to char/u8 use it instead,
-   or plain int
+-  do not use *short int* type if possible, if it fits to char/u8 use it instead,
+   or plain int/u32
+-  memory barriers need to be always documented
+-  add *const* to parameters that are not modified
+-  use bool for indicators and bool status variables (not int)
+-  use matching int types (size, signedness), with exceptions
+-  use ENUM_BIT for enumerated bit values (that don't have assigned fixed numbers)
+-  add function annotations __cold, __init, __attribute_const__ if applicable
+-  use automatic variable cleanup for:
+   -  *struct btrfs_path* with BTRFS_PATH_AUTO_FREE
+-  use of ``unlikely()`` annotation is OK and recommended for the following cases:
+
+   -  control flow of the function is changed due to error handling and it
+      leads to *never-happens* errors like EUCLEAN, EIO
 
 Output
 ^^^^^^
@@ -368,7 +388,8 @@ Expressions, operators
    -  *a \* b + c*, *(a << b) + c*, *(a % b) + c*
 
 -  64bit division is not allowed, either avoid it completely, or use bit
-   shifts or use div_u64 helpers
+   shifts or use div_u64 helpers; do not use *do_div* for division as it's a
+   macro and has side effects
 -  do not use chained assignments: no *a = b = c;*
 
 Variable declarations, parameters
@@ -380,6 +401,8 @@ Variable declarations, parameters
 -  use *const* extensively
 -  add temporary variable to store a value if it's used multiple times in the
    function, or if reading the value needs to chase a long pointer chain
+-  do not mix declarations and statements (although kernel uses C standard that
+   allows that)
 
 Kernel config options
 ---------------------
@@ -449,9 +472,9 @@ Please refer to the option documentation for further details.
 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Not a bug. The lockdep structures can get in some cases full and cannot
-properly track locks anymore. There's only a workaround to increase the kernel
-config value of CONFIG_LOCKDEP_CHAINS_BITS, default is
+Not a bug and please don't report it. The lockdep structures can get in some
+cases full and cannot properly track locks anymore. There's only a workaround
+to increase the kernel config value of CONFIG_LOCKDEP_CHAINS_BITS, default is
 16, 18 tends to work, increase if needed.
 
 fstests setup
@@ -520,10 +543,11 @@ Note: This list may be incomplete.
 Storage environment
 ^^^^^^^^^^^^^^^^^^^
 
--  At least 4 identically sized partitions/disks/virtual disks, specified using
-   ``$SCRATCH_DEV_POOL``, some tests may require 8 such partitions
+-  at least 4 identically sized partitions/disks/virtual disks, specified using
+   ``$SCRATCH_DEV_POOL``
+-  some tests may require 8 equally sized``SCRATCH_DEV_POOL`` partitions
 -  some tests need at least 10G of free space, as determined by ``df``, i.e.
-   the size of the device may need to be larger
+   the size of the device may need to be larger, 12G should work
 -  some tests require ``$LOGWRITES_DEV``, yet another separate block device,
    for power fail testing
 -  for testing trim and discard, the devices must be capable of that (physical
diff --git a/Documentation/plot-contribs.svg b/Documentation/plot-contribs.svg
index 4fa5798924..2f9c535d6e 100644
--- a/Documentation/plot-contribs.svg
+++ b/Documentation/plot-contribs.svg
@@ -163,11 +163,11 @@
 <g fill="none" color="black" stroke="black" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
 </g>
 <g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M111.51,244.00 L111.51,45.01 M111.51,27.01 L111.51,18.01  '/></g>
+	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M110.76,244.00 L110.76,45.01 M110.76,27.01 L110.76,18.01  '/></g>
 <g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
 </g>
 <g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M111.51,244.00 L111.51,235.00 M111.51,18.01 L111.51,27.01  '/>	<g transform="translate(111.51,265.90)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
+	<path stroke='black'  d='M110.76,244.00 L110.76,235.00 M110.76,18.01 L110.76,27.01  '/>	<g transform="translate(110.76,265.90)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
 		<text><tspan font-family="Arial" >3.0</tspan></text>
 	</g>
 </g>
@@ -176,11 +176,11 @@
 <g fill="none" color="black" stroke="black" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
 </g>
 <g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M242.24,244.00 L242.24,18.01  '/></g>
+	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M240.01,244.00 L240.01,18.01  '/></g>
 <g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
 </g>
 <g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M242.24,244.00 L242.24,235.00 M242.24,18.01 L242.24,27.01  '/>	<g transform="translate(242.24,265.90)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
+	<path stroke='black'  d='M240.01,244.00 L240.01,235.00 M240.01,18.01 L240.01,27.01  '/>	<g transform="translate(240.01,265.90)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
 		<text><tspan font-family="Arial" >4.0</tspan></text>
 	</g>
 </g>
@@ -189,11 +189,11 @@
 <g fill="none" color="black" stroke="black" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
 </g>
 <g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M379.50,244.00 L379.50,18.01  '/></g>
+	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M375.72,244.00 L375.72,18.01  '/></g>
 <g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
 </g>
 <g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M379.50,244.00 L379.50,235.00 M379.50,18.01 L379.50,27.01  '/>	<g transform="translate(379.50,265.90)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
+	<path stroke='black'  d='M375.72,244.00 L375.72,235.00 M375.72,18.01 L375.72,27.01  '/>	<g transform="translate(375.72,265.90)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
 		<text><tspan font-family="Arial" >5.0</tspan></text>
 	</g>
 </g>
@@ -202,11 +202,11 @@
 <g fill="none" color="black" stroke="black" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
 </g>
 <g fill="none" color="gray" stroke="currentColor" stroke-width="0.50" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M510.24,244.00 L510.24,18.01  '/></g>
+	<path stroke='gray' stroke-dasharray='2,4' class="gridline"  d='M504.96,244.00 L504.96,18.01  '/></g>
 <g fill="none" color="gray" stroke="gray" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
 </g>
 <g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='black'  d='M510.24,244.00 L510.24,235.00 M510.24,18.01 L510.24,27.01  '/>	<g transform="translate(510.24,265.90)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
+	<path stroke='black'  d='M504.96,244.00 L504.96,235.00 M504.96,18.01 L504.96,27.01  '/>	<g transform="translate(504.96,265.90)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
 		<text><tspan font-family="Arial" >6.0</tspan></text>
 	</g>
 </g>
@@ -220,7 +220,7 @@
 </g>
 <g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
 	<path stroke='black'  d='M614.82,244.00 L614.82,235.00 M614.82,18.01 L614.82,27.01  '/>	<g transform="translate(614.82,265.90)" stroke="none" fill="black" font-family="Arial" font-size="12.00"  text-anchor="middle">
-		<text><tspan font-family="Arial" >6.16</tspan></text>
+		<text><tspan font-family="Arial" >6.17</tspan></text>
 	</g>
 </g>
 <g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
@@ -244,143 +244,143 @@
 	</g>
 </g>
 <g fill="none" color="black" stroke="currentColor" stroke-width="1.00" stroke-linecap="butt" stroke-linejoin="miter">
-	<path stroke='rgb(148,   0, 211)'  d='M130.04,36.01 L172.60,36.01 M46.14,101.95 L46.71,103.62 L47.28,105.25 L47.85,106.87 L48.42,108.48 L48.99,110.09
-		L49.56,111.71 L50.12,113.36 L50.69,115.04 L51.26,116.76 L51.83,118.55 L52.40,120.40 L52.68,121.32 L52.97,122.38
-		L53.54,124.76 L54.11,127.46 L54.68,130.37 L55.25,133.37 L55.82,136.35 L56.39,139.18 L56.96,141.76 L57.52,143.96
-		L58.09,145.67 L58.66,146.77 L59.21,147.15 L59.23,147.15 L59.80,146.92 L60.37,146.30 L60.94,145.36 L61.51,144.17
-		L62.08,142.81 L62.65,141.32 L63.22,139.80 L63.79,138.29 L64.36,136.88 L64.93,135.63 L65.49,134.60 L65.75,134.23
-		L66.06,133.82 L66.63,133.04 L67.20,132.26 L67.77,131.49 L68.34,130.75 L68.91,130.05 L69.48,129.42 L70.05,128.87
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-		L74.60,132.22 L75.17,134.42 L75.74,136.93 L76.31,139.71 L76.88,142.70 L77.45,145.82 L78.02,149.03 L78.59,152.27
-		L78.82,153.60 L79.16,155.79 L79.73,160.75 L80.29,166.94 L80.86,174.01 L81.43,181.59 L82.00,189.31 L82.57,196.81
-		L83.14,203.72 L83.71,209.68 L84.28,214.31 L84.85,217.26 L85.36,218.17 L85.42,218.16 L85.99,216.44 L86.56,212.21
-		L87.13,205.92 L87.70,198.03 L88.26,188.99 L88.83,179.25 L89.40,169.29 L89.97,159.53 L90.54,150.46 L91.11,142.51
-		L91.68,136.14 L91.90,134.23 L92.25,131.44 L92.82,127.22 L93.39,123.31 L93.96,119.67 L94.53,116.25 L95.10,113.02
-		L95.66,109.92 L96.23,106.93 L96.80,103.99 L97.37,101.06 L97.94,98.10 L98.43,95.49 L98.51,95.07 L99.08,91.77
-		L99.65,88.21 L100.22,84.49 L100.79,80.74 L101.36,77.07 L101.93,73.60 L102.50,70.44 L103.06,67.71 L103.63,65.53
-		L104.20,64.01 L104.77,63.26 L104.97,63.21 L105.34,63.36 L105.91,64.13 L106.48,65.44 L107.05,67.18 L107.62,69.23
-		L108.19,71.48 L108.76,73.82 L109.33,76.12 L109.90,78.28 L110.47,80.17 L111.03,81.69 L111.51,82.58 L111.60,82.72
-		L112.17,83.56 L112.74,84.39 L113.31,85.19 L113.88,85.94 L114.45,86.65 L115.02,87.28 L115.59,87.84 L116.16,88.31
-		L116.73,88.67 L117.30,88.91 L117.87,89.03 L118.04,89.04 L118.43,88.63 L119.00,86.77 L119.57,83.65 L120.14,79.61
-		L120.71,74.93 L121.28,69.93 L121.85,64.91 L122.42,60.18 L122.99,56.06 L123.56,52.83 L124.13,50.82 L124.58,50.29
-		L124.70,50.31 L125.27,50.74 L125.83,51.70 L126.40,53.11 L126.97,54.87 L127.54,56.89 L128.11,59.07 L128.68,61.33
-		L129.25,63.58 L129.82,65.71 L130.39,67.64 L130.96,69.28 L131.12,69.66 L131.53,70.61 L132.10,71.80 L132.67,72.90
-		L133.24,73.93 L133.80,74.92 L134.37,75.89 L134.94,76.87 L135.51,77.90 L136.08,78.99 L136.65,80.18 L137.22,81.49
-		L137.65,82.58 L137.79,82.96 L138.36,84.90 L138.93,87.32 L139.50,90.09 L140.07,93.08 L140.64,96.13 L141.20,99.12
-		L141.77,101.92 L142.34,104.38 L142.91,106.37 L143.48,107.75 L144.05,108.38 L144.19,108.41 L144.62,108.20 L145.19,107.34
-		L145.76,105.91 L146.33,103.98 L146.90,101.66 L147.47,99.03 L148.04,96.19 L148.60,93.22 L149.17,90.21 L149.74,87.26
-		L150.31,84.46 L150.72,82.58 L150.88,81.87 L151.45,78.95 L152.02,75.62 L152.59,72.01 L153.16,68.27 L153.73,64.54
-		L154.30,60.96 L154.87,57.68 L155.44,54.83 L156.01,52.56 L156.57,51.01 L157.14,50.32 L157.26,50.29 L157.71,50.74
-		L158.28,52.41 L158.85,55.10 L159.42,58.54 L159.99,62.47 L160.56,66.65 L161.13,70.82 L161.70,74.72 L162.27,78.09
-		L162.84,80.69 L163.41,82.24 L163.80,82.58 L163.97,82.52 L164.54,81.65 L165.11,79.86 L165.68,77.38 L166.25,74.39
-		L166.82,71.12 L167.39,67.75 L167.96,64.50 L168.53,61.58 L169.10,59.17 L169.67,57.50 L170.24,56.77 L170.33,56.75
-		L170.81,57.11 L171.37,58.43 L171.94,60.55 L172.51,63.33 L173.08,66.59 L173.65,70.19 L174.22,73.95 L174.79,77.72
-		L175.36,81.35 L175.93,84.66 L176.50,87.50 L176.87,89.04 L177.07,89.77 L177.64,91.98 L178.21,94.26 L178.78,96.55
-		L179.34,98.80 L179.91,100.94 L180.48,102.92 L181.05,104.68 L181.62,106.17 L182.19,107.32 L182.76,108.09 L183.33,108.40
-		L183.41,108.41 L183.90,107.27 L184.47,103.41 L185.04,97.37 L185.61,89.71 L186.18,80.99 L186.74,71.77 L187.31,62.63
-		L187.88,54.11 L188.45,46.79 L189.02,41.23 L189.59,37.98 L189.94,37.38 L190.16,37.55 L190.73,39.44 L191.30,43.11
-		L191.87,48.17 L192.44,54.19 L193.01,60.77 L193.58,67.49 L194.14,73.96 L194.71,79.76 L195.28,84.47 L195.85,87.70
-		L196.42,89.02 L196.48,89.04 L196.99,88.59 L197.56,87.15 L198.13,84.93 L198.70,82.13 L199.27,78.95 L199.84,75.60
-		L200.41,72.28 L200.98,69.19 L201.55,66.55 L202.11,64.55 L202.68,63.40 L203.02,63.21 L203.25,63.23 L203.82,63.48
-		L204.39,63.94 L204.96,64.58 L205.53,65.34 L206.10,66.16 L206.67,67.00 L207.24,67.81 L207.81,68.53 L208.38,69.11
-		L208.95,69.51 L209.51,69.66 L209.55,69.66 L210.08,69.42 L210.65,68.69 L211.22,67.57 L211.79,66.16 L212.36,64.57
-		L212.93,62.89 L213.50,61.23 L214.07,59.69 L214.64,58.38 L215.21,57.39 L215.78,56.84 L216.09,56.75 L216.35,57.04
-		L216.91,59.57 L217.48,64.31 L218.05,70.72 L218.62,78.31 L219.19,86.57 L219.76,94.97 L220.33,103.01 L220.90,110.18
-		L221.47,115.96 L222.04,119.84 L222.61,121.32 L222.63,121.32 L223.18,120.54 L223.75,118.30 L224.32,114.90 L224.88,110.65
-		L225.45,105.85 L226.02,100.82 L226.59,95.85 L227.16,91.26 L227.73,87.35 L228.30,84.43 L228.87,82.81 L229.16,82.58
-		L229.44,82.81 L230.01,84.64 L230.58,88.00 L231.15,92.53 L231.72,97.87 L232.28,103.65 L232.85,109.53 L233.42,115.14
-		L233.99,120.13 L234.56,124.14 L235.13,126.81 L235.42,127.53 L235.70,127.78 L236.27,127.38 L236.84,126.25 L237.41,124.53
-		L237.98,122.31 L238.55,119.72 L239.12,116.88 L239.68,113.90 L240.25,110.89 L240.82,107.99 L241.39,105.30 L241.96,102.94
-		L242.24,101.95 L242.53,100.93 L243.10,98.82 L243.67,96.61 L244.24,94.35 L244.81,92.11 L245.38,89.96 L245.95,87.96
-		L246.52,86.19 L247.08,84.69 L247.65,83.55 L248.22,82.82 L248.77,82.58 L248.79,82.58 L249.36,83.47 L249.93,85.80
-		L250.50,89.27 L251.07,93.57 L251.64,98.39 L252.21,103.43 L252.78,108.38 L253.35,112.94 L253.92,116.79 L254.49,119.63
-		L255.05,121.15 L255.31,121.32 L255.62,121.20 L256.19,120.38 L256.76,118.91 L257.33,116.90 L257.90,114.46 L258.47,111.72
-		L259.04,108.79 L259.61,105.78 L260.18,102.82 L260.75,100.01 L261.32,97.49 L261.85,95.49 L261.89,95.36 L262.45,93.32
-		L263.02,91.15 L263.59,88.90 L264.16,86.65 L264.73,84.45 L265.30,82.38 L265.87,80.49 L266.44,78.87 L267.01,77.56
-		L267.58,76.64 L268.15,76.17 L268.38,76.12 L268.72,76.12 L269.29,76.12 L269.85,76.12 L270.42,76.12 L270.99,76.12
-		L271.56,76.12 L272.13,76.12 L272.70,76.12 L273.27,76.12 L273.84,76.12 L274.41,76.12 L274.92,76.12 L274.98,76.12
-		L275.55,75.80 L276.12,75.02 L276.69,73.82 L277.26,72.29 L277.82,70.47 L278.39,68.45 L278.96,66.29 L279.53,64.04
-		L280.10,61.78 L280.67,59.58 L281.24,57.50 L281.46,56.75 L281.81,55.46 L282.38,53.05 L282.95,50.32 L283.52,47.39
-		L284.09,44.39 L284.66,41.42 L285.22,38.61 L285.79,36.06 L286.36,33.90 L286.93,32.25 L287.50,31.22 L287.99,30.92
-		L288.07,30.95 L288.64,32.88 L289.21,37.39 L289.78,43.94 L290.35,51.95 L290.92,60.86 L291.49,70.11 L292.06,79.14
-		L292.62,87.38 L293.19,94.27 L293.76,99.25 L294.33,101.76 L294.53,101.95 L294.90,101.77 L295.47,100.86 L296.04,99.32
-		L296.61,97.31 L297.18,94.98 L297.75,92.48 L298.32,89.97 L298.89,87.60 L299.46,85.52 L300.03,83.89 L300.59,82.87
-		L301.07,82.58 L301.16,82.58 L301.73,82.77 L302.30,83.18 L302.87,83.78 L303.44,84.52 L304.01,85.33 L304.58,86.17
-		L305.15,86.99 L305.72,87.73 L306.29,88.36 L306.86,88.80 L307.43,89.02 L307.60,89.04 L307.99,89.04 L308.56,89.04
-		L309.13,89.04 L309.70,89.04 L310.27,89.04 L310.84,89.04 L311.41,89.04 L311.98,89.04 L312.55,89.04 L313.12,89.04
-		L313.69,89.04 L314.14,89.04 L314.26,89.05 L314.83,89.63 L315.39,90.91 L315.96,92.72 L316.53,94.93 L317.10,97.37
-		L317.67,99.90 L318.24,102.35 L318.81,104.58 L319.38,106.42 L319.95,107.74 L320.52,108.37 L320.68,108.41 L321.09,107.82
-		L321.66,105.26 L322.23,101.06 L322.80,95.63 L323.36,89.37 L323.93,82.69 L324.50,76.01 L325.07,69.73 L325.64,64.26
-		L326.21,60.01 L326.78,57.40 L327.21,56.75 L327.35,56.76 L327.92,56.96 L328.49,57.39 L329.06,58.00 L329.63,58.74
-		L330.20,59.56 L330.76,60.40 L331.33,61.22 L331.90,61.95 L332.47,62.57 L333.04,63.00 L333.61,63.20 L333.75,63.21
-		L334.18,63.05 L334.75,62.39 L335.32,61.33 L335.89,59.96 L336.46,58.39 L337.03,56.72 L337.60,55.05 L338.16,53.49
-		L338.73,52.13 L339.30,51.08 L339.87,50.44 L340.28,50.29 L340.44,50.33 L341.01,51.09 L341.58,52.69 L342.15,55.01
-		L342.72,57.89 L343.29,61.20 L343.86,64.80 L344.43,68.53 L345.00,72.27 L345.57,75.86 L346.13,79.17 L346.70,82.05
-		L346.82,82.58 L347.27,84.65 L347.84,87.46 L348.41,90.42 L348.98,93.42 L349.55,96.39 L350.12,99.22 L350.69,101.83
-		L351.26,104.13 L351.83,106.02 L352.40,107.42 L352.97,108.23 L353.36,108.41 L353.53,108.34 L354.10,107.24 L354.67,105.01
-		L355.24,101.90 L355.81,98.17 L356.38,94.08 L356.95,89.87 L357.52,85.81 L358.09,82.15 L358.66,79.15 L359.23,77.06
-		L359.80,76.14 L359.89,76.12 L360.37,76.17 L360.93,76.35 L361.50,76.66 L362.07,77.08 L362.64,77.59 L363.21,78.19
-		L363.78,78.87 L364.35,79.60 L364.92,80.38 L365.49,81.19 L366.06,82.03 L366.43,82.58 L366.63,82.88 L367.20,83.87
-		L367.77,85.02 L368.34,86.34 L368.90,87.80 L369.47,89.41 L370.04,91.15 L370.61,93.02 L371.18,95.01 L371.75,97.11
-		L372.32,99.32 L372.89,101.62 L372.97,101.95 L373.46,104.42 L374.03,108.22 L374.60,112.78 L375.17,117.87 L375.74,123.21
-		L376.30,128.58 L376.87,133.71 L377.44,138.35 L378.01,142.25 L378.58,145.16 L379.15,146.84 L379.50,147.15 L379.72,147.11
-		L380.29,146.66 L380.86,145.75 L381.43,144.45 L382.00,142.84 L382.57,140.96 L383.14,138.89 L383.70,136.70 L384.27,134.44
-		L384.84,132.19 L385.41,130.02 L385.98,127.98 L386.04,127.78 L386.55,125.86 L387.12,123.35 L387.69,120.55 L388.26,117.59
-		L388.83,114.59 L389.40,111.65 L389.97,108.90 L390.54,106.45 L391.11,104.42 L391.67,102.93 L392.24,102.09 L392.58,101.95
-		L392.81,101.98 L393.38,102.32 L393.95,102.97 L394.52,103.89 L395.09,105.03 L395.66,106.34 L396.23,107.76 L396.80,109.24
-		L397.37,110.74 L397.94,112.19 L398.51,113.56 L399.07,114.78 L399.11,114.86 L399.64,115.94 L400.21,117.14 L400.78,118.37
-		L401.35,119.62 L401.92,120.86 L402.49,122.09 L403.06,123.28 L403.63,124.42 L404.20,125.49 L404.77,126.47 L405.34,127.34
-		L405.65,127.78 L405.91,128.12 L406.47,128.89 L407.04,129.67 L407.61,130.44 L408.18,131.18 L408.75,131.89 L409.32,132.53
-		L409.89,133.09 L410.46,133.56 L411.03,133.92 L411.60,134.15 L412.17,134.23 L412.19,134.23 L412.74,134.17 L413.31,133.98
-		L413.88,133.67 L414.44,133.26 L415.01,132.75 L415.58,132.16 L416.15,131.48 L416.72,130.75 L417.29,129.95 L417.86,129.11
-		L418.43,128.24 L418.72,127.78 L419.00,127.24 L419.57,125.58 L420.14,123.30 L420.71,120.57 L421.28,117.54 L421.84,114.39
-		L422.41,111.27 L422.98,108.35 L423.55,105.80 L424.12,103.77 L424.69,102.43 L424.98,102.07 L425.26,101.95 L425.83,102.02
-		L426.40,102.23 L426.97,102.55 L427.54,102.99 L428.11,103.52 L428.68,104.13 L429.24,104.82 L429.81,105.56 L430.38,106.34
-		L430.95,107.16 L431.52,108.00 L431.80,108.41 L432.09,108.92 L432.66,110.30 L433.23,112.08 L433.80,114.17 L434.37,116.44
-		L434.94,118.78 L435.51,121.07 L436.08,123.20 L436.64,125.05 L437.21,126.50 L437.78,127.45 L438.33,127.78 L438.35,127.78
-		L438.92,127.19 L439.49,125.63 L440.06,123.32 L440.63,120.45 L441.20,117.24 L441.77,113.87 L442.34,110.57 L442.91,107.54
-		L443.48,104.97 L444.05,103.08 L444.61,102.06 L444.87,101.95 L445.18,102.25 L445.75,104.20 L446.32,107.65 L446.89,112.25
-		L447.46,117.62 L448.03,123.43 L448.60,129.30 L449.17,134.88 L449.74,139.82 L450.31,143.74 L450.88,146.30 L451.41,147.15
-		L451.45,147.14 L452.01,146.36 L452.58,144.38 L453.15,141.46 L453.72,137.86 L454.29,133.83 L454.86,129.62 L455.43,125.51
-		L456.00,121.73 L456.57,118.54 L457.14,116.21 L457.71,114.99 L457.94,114.86 L458.28,114.91 L458.85,115.20 L459.41,115.70
-		L459.98,116.36 L460.55,117.13 L461.12,117.96 L461.69,118.80 L462.26,119.59 L462.83,120.29 L463.40,120.85 L463.97,121.21
-		L464.48,121.32 L464.54,121.32 L465.11,121.32 L465.68,121.32 L466.25,121.32 L466.82,121.32 L467.38,121.32 L467.95,121.32
-		L468.52,121.32 L469.09,121.32 L469.66,121.32 L470.23,121.32 L470.80,121.32 L471.02,121.32 L471.37,121.43 L471.94,122.02
-		L472.51,123.03 L473.08,124.36 L473.65,125.91 L474.22,127.57 L474.78,129.25 L475.35,130.83 L475.92,132.23 L476.49,133.32
-		L477.06,134.03 L477.55,134.23 L477.63,134.21 L478.20,132.99 L478.77,130.12 L479.34,125.95 L479.91,120.86 L480.48,115.18
-		L481.05,109.30 L481.62,103.55 L482.18,98.31 L482.75,93.92 L483.32,90.75 L483.89,89.16 L484.09,89.04 L484.46,89.46
-		L485.03,91.58 L485.60,95.17 L486.17,99.86 L486.74,105.30 L487.31,111.13 L487.88,116.98 L488.45,122.52 L489.02,127.36
-		L489.59,131.16 L490.15,133.56 L490.63,134.23 L490.72,134.18 L491.29,131.79 L491.86,126.36 L492.43,118.55 L493.00,109.04
-		L493.57,98.48 L494.14,87.55 L494.71,76.90 L495.28,67.20 L495.85,59.12 L496.42,53.32 L496.99,50.47 L497.16,50.29
-		L497.55,50.90 L498.12,53.70 L498.69,58.37 L499.26,64.44 L499.83,71.46 L500.40,78.96 L500.97,86.48 L501.54,93.57
-		L502.11,99.76 L502.68,104.60 L503.25,107.61 L503.70,108.41 L503.82,108.39 L504.39,108.03 L504.95,107.20 L505.52,105.96
-		L506.09,104.39 L506.66,102.56 L507.23,100.52 L507.80,98.34 L508.37,96.09 L508.94,93.84 L509.51,91.64 L510.08,89.58
-		L510.24,89.04 L510.65,87.51 L511.22,85.06 L511.79,82.31 L512.36,79.37 L512.92,76.36 L513.49,73.40 L514.06,70.61
-		L514.63,68.10 L515.20,65.99 L515.77,64.40 L516.34,63.44 L516.77,63.21 L516.91,63.24 L517.48,63.96 L518.05,65.54
-		L518.62,67.83 L519.19,70.70 L519.76,74.00 L520.32,77.58 L520.89,81.32 L521.46,85.05 L522.03,88.65 L522.60,91.97
-		L523.17,94.87 L523.31,95.49 L523.74,97.43 L524.31,100.07 L524.88,102.77 L525.45,105.49 L526.02,108.16 L526.59,110.75
-		L527.16,113.19 L527.72,115.44 L528.29,117.45 L528.86,119.18 L529.43,120.56 L529.84,121.32 L530.00,121.57 L530.57,122.45
-		L531.14,123.30 L531.71,124.10 L532.28,124.85 L532.85,125.54 L533.42,126.16 L533.99,126.69 L534.56,127.13 L535.13,127.46
-		L535.69,127.68 L536.26,127.77 L536.38,127.78 L536.83,127.73 L537.40,127.53 L537.97,127.20 L538.54,126.76 L539.11,126.21
-		L539.68,125.59 L540.25,124.90 L540.82,124.17 L541.39,123.40 L541.96,122.62 L542.53,121.84 L542.92,121.32 L543.09,121.07
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diff --git a/Documentation/plot-patches.svg b/Documentation/plot-patches.svg
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-		L394.13,82.58 L394.67,82.45 L395.20,82.31 L395.74,82.17 L396.27,82.03 L396.81,81.89 L397.34,81.74 L397.88,81.59
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-		L430.02,74.95 L430.30,74.87 L430.55,74.80 L431.09,74.66 L431.63,74.51 L432.16,74.37 L432.70,74.23 L433.23,74.09
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-		L477.16,61.60 L477.69,61.48 L478.23,61.35 L478.76,61.22 L479.30,61.07 L479.50,61.02 L479.83,60.92 L480.37,60.77
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-		L485.19,59.13 L485.65,58.96 L485.73,58.93 L486.26,58.73 L486.80,58.50 L487.33,58.26 L487.87,58.01 L488.41,57.76
-		L488.94,57.51 L489.48,57.28 L490.01,57.05 L490.55,56.85 L491.08,56.67 L491.62,56.53 L491.80,56.48 L492.15,56.41
-		L492.69,56.32 L493.23,56.23 L493.76,56.16 L494.30,56.10 L494.83,56.04 L495.37,55.98 L495.90,55.91 L496.44,55.84
-		L496.98,55.76 L497.51,55.66 L497.95,55.57 L498.05,55.55 L498.58,55.39 L499.12,55.17 L499.65,54.91 L500.19,54.63
-		L500.73,54.32 L501.26,54.01 L501.80,53.71 L502.33,53.43 L502.87,53.18 L503.40,52.98 L503.94,52.83 L504.11,52.80
-		L504.47,52.73 L505.01,52.66 L505.55,52.59 L506.08,52.54 L506.62,52.49 L507.15,52.44 L507.69,52.40 L508.22,52.36
-		L508.76,52.31 L509.30,52.25 L509.83,52.18 L510.26,52.12 L510.37,52.11 L510.90,52.01 L511.44,51.91 L511.97,51.80
-		L512.51,51.68 L513.05,51.54 L513.58,51.40 L514.12,51.25 L514.65,51.09 L515.19,50.92 L515.72,50.75 L516.26,50.56
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-		L540.36,47.39 L540.90,47.46 L541.01,47.46 L541.44,47.46 L541.97,47.45 L542.51,47.43 L543.04,47.40 L543.58,47.37
-		L544.11,47.34 L544.65,47.30 L545.18,47.26 L545.72,47.21 L546.26,47.17 L546.79,47.12 L547.16,47.09 L547.33,47.07
-		L547.86,47.00 L548.40,46.90 L548.93,46.79 L549.47,46.67 L550.01,46.55 L550.54,46.43 L551.08,46.31 L551.61,46.21
-		L552.15,46.13 L552.68,46.07 L553.22,46.04 L553.31,46.04 L553.76,46.07 L554.29,46.15 L554.83,46.28 L555.36,46.44
-		L555.90,46.63 L556.43,46.82 L556.97,47.02 L557.50,47.20 L558.04,47.36 L558.58,47.48 L559.11,47.55 L559.46,47.57
-		L559.65,47.56 L560.18,47.53 L560.72,47.46 L561.25,47.37 L561.79,47.25 L562.33,47.11 L562.86,46.95 L563.40,46.79
-		L563.93,46.63 L564.47,46.46 L565.00,46.31 L565.54,46.17 L565.61,46.15 L566.08,46.03 L566.61,45.88 L567.15,45.73
-		L567.68,45.57 L568.22,45.41 L568.75,45.25 L569.29,45.10 L569.82,44.95 L570.36,44.81 L570.90,44.69 L571.43,44.58
-		L571.76,44.52 L571.97,44.49 L572.50,44.41 L573.04,44.35 L573.57,44.29 L574.11,44.23 L574.65,44.19 L575.18,44.14
-		L575.72,44.08 L576.25,44.03 L576.79,43.96 L577.32,43.88 L577.86,43.80 L577.92,43.79 L578.40,43.67 L578.93,43.48
-		L579.47,43.25 L580.00,42.98 L580.54,42.69 L581.07,42.40 L581.61,42.11 L582.15,41.85 L582.68,41.63 L583.22,41.46
-		L583.75,41.36 L584.07,41.34 L584.29,41.33 L584.82,41.32 L585.36,41.31 L585.89,41.30 L586.43,41.30 L586.97,41.29
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+		L516.26,47.94 L516.80,47.65 L517.33,47.37 L517.53,47.27 L517.87,47.10 L518.40,46.81 L518.94,46.50 L519.47,46.18
+		L520.01,45.86 L520.54,45.56 L521.08,45.28 L521.62,45.03 L522.15,44.83 L522.69,44.68 L523.22,44.59 L523.61,44.57
+		L523.76,44.57 L524.29,44.57 L524.83,44.59 L525.37,44.61 L525.90,44.64 L526.44,44.67 L526.97,44.71 L527.51,44.75
+		L528.04,44.80 L528.58,44.85 L529.12,44.91 L529.65,44.97 L529.69,44.97 L530.19,45.07 L530.72,45.24 L531.26,45.48
+		L531.79,45.76 L532.33,46.07 L532.86,46.38 L533.40,46.69 L533.94,46.96 L534.47,47.19 L535.01,47.36 L535.54,47.45
+		L535.77,47.46 L536.08,47.46 L536.61,47.45 L537.15,47.43 L537.69,47.41 L538.22,47.38 L538.76,47.34 L539.29,47.31
+		L539.83,47.26 L540.36,47.22 L540.90,47.17 L541.44,47.12 L541.85,47.09 L541.97,47.07 L542.51,47.00 L543.04,46.91
+		L543.58,46.80 L544.11,46.68 L544.65,46.55 L545.18,46.43 L545.72,46.31 L546.26,46.21 L546.79,46.12 L547.33,46.07
+		L547.86,46.04 L547.93,46.04 L548.40,46.07 L548.93,46.15 L549.47,46.29 L550.01,46.46 L550.54,46.65 L551.08,46.85
+		L551.61,47.04 L552.15,47.23 L552.68,47.38 L553.22,47.50 L553.76,47.56 L554.01,47.57 L554.29,47.56 L554.83,47.52
+		L555.36,47.45 L555.90,47.34 L556.43,47.22 L556.97,47.07 L557.50,46.91 L558.04,46.75 L558.58,46.58 L559.11,46.42
+		L559.65,46.27 L560.09,46.15 L560.18,46.13 L560.72,45.98 L561.25,45.83 L561.79,45.68 L562.33,45.51 L562.86,45.35
+		L563.40,45.19 L563.93,45.04 L564.47,44.89 L565.00,44.76 L565.54,44.64 L566.08,44.54 L566.17,44.52 L566.61,44.45
+		L567.15,44.38 L567.68,44.32 L568.22,44.26 L568.75,44.21 L569.29,44.16 L569.82,44.11 L570.36,44.05 L570.90,43.99
+		L571.43,43.92 L571.97,43.84 L572.25,43.79 L572.50,43.73 L573.04,43.57 L573.57,43.35 L574.11,43.09 L574.65,42.80
+		L575.18,42.50 L575.72,42.21 L576.25,41.94 L576.79,41.70 L577.32,41.51 L577.86,41.39 L578.33,41.34 L578.40,41.34
+		L578.93,41.32 L579.47,41.31 L580.00,41.31 L580.54,41.30 L581.07,41.29 L581.61,41.29 L582.15,41.29 L582.68,41.28
+		L583.22,41.27 L583.75,41.26 L584.29,41.25 L584.42,41.25 L584.82,41.23 L585.36,41.17 L585.89,41.08 L586.43,40.96
+		L586.97,40.82 L587.50,40.66 L588.04,40.49 L588.57,40.30 L589.11,40.11 L589.64,39.91 L590.18,39.71 L590.50,39.59
+		L590.72,39.50 L591.25,39.24 L591.79,38.92 L592.32,38.56 L592.86,38.17 L593.39,37.78 L593.93,37.39 L594.47,37.02
+		L595.00,36.70 L595.54,36.43 L596.07,36.23 L596.58,36.12 L596.61,36.12 L597.14,36.06 L597.68,36.01 L598.21,35.96
+		L598.75,35.93 L599.29,35.90 L599.82,35.87 L600.36,35.84 L600.89,35.82 L601.43,35.78 L601.96,35.75 L602.50,35.70
+		L602.66,35.69 L603.04,35.65 L603.57,35.57 L604.11,35.49 L604.64,35.40 L605.18,35.30 L605.71,35.20 L606.25,35.11
+		L606.79,35.01 L607.32,34.92 L607.86,34.84 L608.39,34.78 L608.74,34.74 L608.93,34.73 L609.46,34.69 L610.00,34.65
+		L610.53,34.61 L611.07,34.58 L611.61,34.55 L612.14,34.52 L612.68,34.50 L613.21,34.47 L613.75,34.44 L614.28,34.41
+		L614.55,34.40 L614.82,34.38  '/></g>
 	</g>
 <g fill="none" color="white" stroke="rgb(  0, 158, 115)" stroke-width="2.00" stroke-linecap="butt" stroke-linejoin="miter">
 </g>
diff --git a/Makefile b/Makefile
index 7bc22466bc..96c11830e3 100644
--- a/Makefile
+++ b/Makefile
@@ -556,7 +556,7 @@ test-mkfs: btrfs mkfs.btrfs
 	@echo "  TEST     mkfs-tests.sh"
 	$(Q)bash tests/mkfs-tests.sh
 
-test-fuzz: btrfs btrfs-image
+test-fuzz: btrfs btrfs-image btrfs-sb-mod
 	@echo "  TEST     fuzz-tests.sh"
 	$(Q)bash tests/fuzz-tests.sh
 
diff --git a/btrfs-completion b/btrfs-completion
index 3ec68e1bfd..142916e785 100644
--- a/btrfs-completion
+++ b/btrfs-completion
@@ -24,14 +24,14 @@ _btrfs()
 
 	commands='subvolume filesystem balance device scrub check rescue restore inspect-internal property send receive quota qgroup replace help version'
 	commands_subvolume='create delete list snapshot find-new get-default set-default show sync'
-	commands_filesystem='defragment sync resize show df du label usage mkswapfile'
+	commands_filesystem='defragment sync resize show df du label usage mkswapfile commit-stats'
 	commands_balance='start pause cancel resume status'
 	commands_device='scan add delete remove ready stats usage'
 	commands_scrub='start cancel resume status'
 	commands_rescue='chunk-recover super-recover zero-log fix-device-size create-control-device clear-uuid-tree clear-ino-cache clear-space-cache'
 	commands_inspect_internal='inode-resolve logical-resolve subvolid-resolve rootid min-dev-size dump-tree dump-super tree-stats map-swapfile'
 	commands_property='get set list'
-	commands_quota='enable disable rescan'
+	commands_quota='enable disable rescan status'
 	commands_qgroup='assign remove create destroy show limit clear-stale'
 	commands_replace='start status cancel'
 
diff --git a/btrfs-corrupt-block.c b/btrfs-corrupt-block.c
index fc71eb2cbf..3d349f8cf4 100644
--- a/btrfs-corrupt-block.c
+++ b/btrfs-corrupt-block.c
@@ -54,8 +54,7 @@ static int debug_corrupt_sector(struct btrfs_root *root, u64 logical, int mirror
 
 	buf = malloc(root->fs_info->sectorsize);
 	if (!buf) {
-		error_msg(ERROR_MSG_MEMORY, "allocating memory for bytenr %llu",
-			  logical);
+		error_mem("allocating memory for bytenr %llu", logical);
 		return -ENOMEM;
 	}
 
@@ -374,43 +373,43 @@ enum btrfs_block_group_field {
 
 static enum btrfs_block_group_field convert_block_group_field(char *field)
 {
-	if (!strncmp(field, "used", FIELD_BUF_LEN))
+	if (strncmp(field, "used", FIELD_BUF_LEN) == 0)
 		return BTRFS_BLOCK_GROUP_ITEM_USED;
-	if (!strncmp(field, "flags", FIELD_BUF_LEN))
+	if (strncmp(field, "flags", FIELD_BUF_LEN) == 0)
 		return BTRFS_BLOCK_GROUP_ITEM_FLAGS;
-	if (!strncmp(field, "chunk_objectid", FIELD_BUF_LEN))
+	if (strncmp(field, "chunk_objectid", FIELD_BUF_LEN) == 0)
 		return BTRFS_BLOCK_GROUP_ITEM_CHUNK_OBJECTID;
 	return BTRFS_BLOCK_GROUP_ITEM_BAD;
 }
 
 static enum btrfs_inode_field convert_inode_field(char *field)
 {
-	if (!strncmp(field, "isize", FIELD_BUF_LEN))
+	if (strncmp(field, "isize", FIELD_BUF_LEN) == 0)
 		return BTRFS_INODE_FIELD_ISIZE;
-	if (!strncmp(field, "nbytes", FIELD_BUF_LEN))
+	if (strncmp(field, "nbytes", FIELD_BUF_LEN) == 0)
 		return BTRFS_INODE_FIELD_NBYTES;
-	if (!strncmp(field, "nlink", FIELD_BUF_LEN))
+	if (strncmp(field, "nlink", FIELD_BUF_LEN) == 0)
 		return BTRFS_INODE_FIELD_NLINK;
-	if (!strncmp(field, "generation", FIELD_BUF_LEN))
+	if (strncmp(field, "generation", FIELD_BUF_LEN) == 0)
 		return BTRFS_INODE_FIELD_GENERATION;
-	if (!strncmp(field, "transid", FIELD_BUF_LEN))
+	if (strncmp(field, "transid", FIELD_BUF_LEN) == 0)
 		return BTRFS_INODE_FIELD_TRANSID;
-	if (!strncmp(field, "block_group", FIELD_BUF_LEN))
+	if (strncmp(field, "block_group", FIELD_BUF_LEN) == 0)
 		return BTRFS_INODE_FIELD_BLOCK_GROUP;
-	if (!strncmp(field, "mode", FIELD_BUF_LEN))
+	if (strncmp(field, "mode", FIELD_BUF_LEN) == 0)
 		return BTRFS_INODE_FIELD_MODE;
-	if (!strncmp(field, "uid", FIELD_BUF_LEN))
+	if (strncmp(field, "uid", FIELD_BUF_LEN) == 0)
 		return BTRFS_INODE_FIELD_UID;
-	if (!strncmp(field, "gid", FIELD_BUF_LEN))
+	if (strncmp(field, "gid", FIELD_BUF_LEN) == 0)
 		return BTRFS_INODE_FIELD_GID;
 	return BTRFS_INODE_FIELD_BAD;
 }
 
 static enum btrfs_file_extent_field convert_file_extent_field(char *field)
 {
-	if (!strncmp(field, "disk_bytenr", FIELD_BUF_LEN))
+	if (strncmp(field, "disk_bytenr", FIELD_BUF_LEN) == 0)
 		return BTRFS_FILE_EXTENT_DISK_BYTENR;
-	if (!strncmp(field, "type", FIELD_BUF_LEN))
+	if (strncmp(field, "type", FIELD_BUF_LEN) == 0)
 		return BTRFS_FILE_EXTENT_TYPE;
 	return BTRFS_FILE_EXTENT_BAD;
 }
@@ -418,36 +417,36 @@ static enum btrfs_file_extent_field convert_file_extent_field(char *field)
 static enum btrfs_metadata_block_field
 convert_metadata_block_field(char *field)
 {
-	if (!strncmp(field, "generation", FIELD_BUF_LEN))
+	if (strncmp(field, "generation", FIELD_BUF_LEN) == 0)
 		return BTRFS_METADATA_BLOCK_GENERATION;
-	if (!strncmp(field, "shift_items", FIELD_BUF_LEN))
+	if (strncmp(field, "shift_items", FIELD_BUF_LEN) == 0)
 		return BTRFS_METADATA_BLOCK_SHIFT_ITEMS;
 	return BTRFS_METADATA_BLOCK_BAD;
 }
 
 static enum btrfs_key_field convert_key_field(char *field)
 {
-	if (!strncmp(field, "objectid", FIELD_BUF_LEN))
+	if (strncmp(field, "objectid", FIELD_BUF_LEN) == 0)
 		return BTRFS_KEY_OBJECTID;
-	if (!strncmp(field, "type", FIELD_BUF_LEN))
+	if (strncmp(field, "type", FIELD_BUF_LEN) == 0)
 		return BTRFS_KEY_TYPE;
-	if (!strncmp(field, "offset", FIELD_BUF_LEN))
+	if (strncmp(field, "offset", FIELD_BUF_LEN) == 0)
 		return BTRFS_KEY_OFFSET;
 	return BTRFS_KEY_BAD;
 }
 
 static enum btrfs_item_field convert_item_field(char *field)
 {
-	if (!strncmp(field, "offset", FIELD_BUF_LEN))
+	if (strncmp(field, "offset", FIELD_BUF_LEN) == 0)
 		return BTRFS_ITEM_OFFSET;
 	return BTRFS_ITEM_BAD;
 }
 
 static enum btrfs_dir_item_field convert_dir_item_field(char *field)
 {
-	if (!strncmp(field, "name", FIELD_BUF_LEN))
+	if (strncmp(field, "name", FIELD_BUF_LEN) == 0)
 		return BTRFS_DIR_ITEM_NAME;
-	if (!strncmp(field, "location_objectid", FIELD_BUF_LEN))
+	if (strncmp(field, "location_objectid", FIELD_BUF_LEN) == 0)
 		return BTRFS_DIR_ITEM_LOCATION_OBJECTID;
 	return BTRFS_DIR_ITEM_BAD;
 }
@@ -1491,7 +1490,7 @@ int main(int argc, char **argv)
 		del = rand_range(3);
 		path = btrfs_alloc_path();
 		if (!path) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			goto out_close;
 		}
 
@@ -1617,9 +1616,7 @@ int main(int argc, char **argv)
 			eb = btrfs_find_create_tree_block(root->fs_info,
 					logical);
 			if (!eb) {
-				error_msg(ERROR_MSG_MEMORY,
-					"allocating extent buffer for bytenr %llu",
-					logical);
+				error_mem("allocating extent buffer for bytenr %llu", logical);
 				ret = 1;
 				goto out_close;
 			}
diff --git a/btrfs-sb-mod.c b/btrfs-sb-mod.c
index 1f3cbb4c97..5b6e61f8f1 100644
--- a/btrfs-sb-mod.c
+++ b/btrfs-sb-mod.c
@@ -36,10 +36,10 @@ static int check_csum_superblock(void *sb)
 	u8 result[BTRFS_CSUM_SIZE];
 	u16 csum_type = btrfs_super_csum_type(sb);
 
-	btrfs_csum_data(NULL, csum_type, (unsigned char *)sb + BTRFS_CSUM_SIZE,
+	btrfs_csum_data(csum_type, (unsigned char *)sb + BTRFS_CSUM_SIZE,
 			result, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
 
-	return !memcmp(sb, result, csum_size);
+	return (memcmp(sb, result, csum_size) == 0);
 }
 
 static void update_block_csum(void *block)
@@ -48,7 +48,7 @@ static void update_block_csum(void *block)
 	struct btrfs_header *hdr;
 	u16 csum_type = btrfs_super_csum_type(block);
 
-	btrfs_csum_data(NULL, csum_type, (unsigned char *)block + BTRFS_CSUM_SIZE,
+	btrfs_csum_data(csum_type, (unsigned char *)block + BTRFS_CSUM_SIZE,
 			result, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
 
 	memset(block, 0, BTRFS_CSUM_SIZE);
@@ -95,7 +95,7 @@ enum field_op {
 };
 
 struct fspec {
-	const char *name;
+	char *name;
 	enum field_op fop;
 	u64 value;
 };
@@ -427,6 +427,7 @@ int main(int argc, char **argv)
 		sb_edit(sb, &spec[i]);
 		if (op_is_write(spec[i].fop))
 			changed = 1;
+		free(spec[i].name);
 	}
 
 	if (changed) {
diff --git a/btrfs.c b/btrfs.c
index 82651f52e6..a864a79d34 100644
--- a/btrfs.c
+++ b/btrfs.c
@@ -150,7 +150,7 @@ static void handle_help_options_next_level(const struct cmd_struct *cmd,
 	if (argc < 2)
 		return;
 
-	if (!strcmp(argv[1], "--help")) {
+	if (strcmp(argv[1], "--help") == 0) {
 		if (cmd->next) {
 			argc--;
 			argv++;
@@ -430,18 +430,18 @@ int main(int argc, char **argv)
 	else
 		bname = argv[0];
 
-	if (!strcmp(bname, "btrfsck")) {
+	if (strcmp(bname, "btrfsck") == 0) {
 		argv[0] = "check";
 #ifdef ENABLE_BOX
-	} else if (!strcmp(bname, "mkfs.btrfs")) {
+	} else if (strcmp(bname, "mkfs.btrfs") == 0) {
 		return mkfs_main(argc, argv);
-	} else if (!strcmp(bname, "btrfs-image")) {
+	} else if (strcmp(bname, "btrfs-image") == 0) {
 		return image_main(argc, argv);
-	} else if (!strcmp(bname, "btrfs-convert")) {
+	} else if (strcmp(bname, "btrfs-convert") == 0) {
 		return convert_main(argc, argv);
-	} else if (!strcmp(bname, "btrfstune")) {
+	} else if (strcmp(bname, "btrfstune") == 0) {
 		return btrfstune_main(argc, argv);
-	} else if (!strcmp(bname, "btrfs-find-root")) {
+	} else if (strcmp(bname, "btrfs-find-root") == 0) {
 		return find_root_main(argc, argv);
 #endif
 	} else {
diff --git a/check/main.c b/check/main.c
index 258c97b2e8..91ce6d7401 100644
--- a/check/main.c
+++ b/check/main.c
@@ -1169,7 +1169,7 @@ static int splice_shared_node(struct shared_node *src_node,
 		} else {
 			ins = malloc(sizeof(*ins));
 			if (!ins) {
-				error_msg(ERROR_MSG_MEMORY, NULL);
+				error_mem(NULL);
 				return -ENOMEM;
 			}
 			ins->cache.start = node->cache.start;
@@ -1425,7 +1425,7 @@ static int add_mismatch_dir_hash(struct inode_record *dir_rec,
 
 	hash_record = malloc(sizeof(*hash_record) + namelen);
 	if (!hash_record) {
-		error_msg(ERROR_MSG_MEMORY, "mismatch dir hash record");
+		error_mem("mismatch dir hash record");
 		return -ENOMEM;
 	}
 	memcpy(&hash_record->key, key, sizeof(*key));
@@ -5369,7 +5369,7 @@ struct chunk_record *btrfs_new_chunk_record(struct extent_buffer *leaf,
 
 	rec = calloc(1, btrfs_chunk_record_size(num_stripes));
 	if (!rec) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		exit(-1);
 	}
 
@@ -5458,7 +5458,7 @@ static int process_device_item(struct rb_root *dev_cache,
 
 	rec = malloc(sizeof(*rec));
 	if (!rec) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return -ENOMEM;
 	}
 
@@ -5519,7 +5519,7 @@ btrfs_new_block_group_record(struct extent_buffer *leaf, struct btrfs_key *key,
 
 	rec = calloc(1, sizeof(*rec));
 	if (!rec) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		exit(-1);
 	}
 
@@ -5584,7 +5584,7 @@ btrfs_new_device_extent_record(struct extent_buffer *leaf,
 
 	rec = calloc(1, sizeof(*rec));
 	if (!rec) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		exit(-1);
 	}
 
@@ -8645,6 +8645,7 @@ static int check_device_used(struct device_record *dev_rec,
 		if (opt_check_repair) {
 			ret = repair_dev_item_bytes_used(gfs_info,
 					dev_rec->devid, total_byte);
+			dev_rec->byte_used = total_byte;
 		}
 		return ret;
 	} else {
@@ -8702,6 +8703,28 @@ static bool is_super_size_valid(void)
 	return true;
 }
 
+static int check_super_dev_item(struct device_record *dev_rec)
+{
+	struct btrfs_dev_item *super_di = &gfs_info->super_copy->dev_item;
+	int ret = 0;
+
+	if (btrfs_stack_device_total_bytes(super_di) != dev_rec->total_byte) {
+		warning("device %llu's total_bytes was %llu in tree but %llu in superblock",
+			dev_rec->devid, dev_rec->total_byte,
+			btrfs_stack_device_total_bytes(super_di));
+		ret = 1;
+	}
+
+	if (btrfs_stack_device_bytes_used(super_di) != dev_rec->byte_used) {
+		warning("device %llu's bytes_used was %llu in tree but %llu in superblock",
+			dev_rec->devid, dev_rec->byte_used,
+			btrfs_stack_device_bytes_used(super_di));
+		ret = 1;
+	}
+
+	return ret;
+}
+
 /* check btrfs_dev_item -> btrfs_dev_extent */
 static int check_devices(struct rb_root *dev_cache,
 			 struct device_extent_tree *dev_extent_cache)
@@ -8723,6 +8746,18 @@ static int check_devices(struct rb_root *dev_cache,
 					 gfs_info->sectorsize);
 		if (dev_rec->bad_block_dev_size && !ret)
 			ret = 1;
+
+		if (dev_rec->devid == gfs_info->super_copy->dev_item.devid) {
+			/*
+			 * This dev item mismatch between super and chunk tree
+			 * is not a criticl problem, and CI kernels do not receive
+			 * needed backport so they will cause mismatch during RW mounts.
+			 *
+			 * SO here we didn't record the mismatch as an error.
+			 */
+			check_super_dev_item(dev_rec);
+		}
+
 		dev_node = rb_next(dev_node);
 	}
 	list_for_each_entry(dext_rec, &dev_extent_cache->no_device_orphans,
@@ -9125,7 +9160,7 @@ static int check_chunks_and_extents(void)
 	bits_nr = 1024;
 	bits = malloc(bits_nr * sizeof(struct block_info));
 	if (!bits) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		exit(1);
 	}
 
diff --git a/check/qgroup-verify.c b/check/qgroup-verify.c
index ff068c0688..0deac0b3fb 100644
--- a/check/qgroup-verify.c
+++ b/check/qgroup-verify.c
@@ -581,7 +581,7 @@ static int account_all_refs(int do_qgroups, u64 search_subvol)
 	ulist_free(roots);
 	return 0;
 enomem:
-	error_msg(ERROR_MSG_MEMORY, "accounting for refs for qgroups");
+	error_mem("accounting for refs for qgroups");
 	return -ENOMEM;
 }
 
@@ -1011,7 +1011,7 @@ static int load_quota_info(struct btrfs_fs_info *info)
 			count = alloc_count(&disk_key, leaf, item);
 			if (!count) {
 				ret = ENOMEM;
-				error_msg(ERROR_MSG_MEMORY, NULL);
+				error_mem(NULL);
 				goto out;
 			}
 
@@ -1592,7 +1592,7 @@ int print_extent_state(struct btrfs_fs_info *info, u64 subvol)
 
 	tree_blocks = ulist_alloc(0);
 	if (!tree_blocks) {
-		error_msg(ERROR_MSG_MEMORY, "allocate ulist");
+		error_mem("allocate ulist");
 		return ENOMEM;
 	}
 
diff --git a/cmds/balance.c b/cmds/balance.c
index 4c73273dfd..25c5ed9931 100644
--- a/cmds/balance.c
+++ b/cmds/balance.c
@@ -104,7 +104,7 @@ static int parse_filters(char *filters, struct btrfs_balance_args *args)
 	     this_char = strtok_r(NULL, ",", &save_ptr)) {
 		if ((value = strchr(this_char, '=')) != NULL)
 			*value++ = 0;
-		if (!strcmp(this_char, "profiles")) {
+		if (strcmp(this_char, "profiles") == 0) {
 			if (!value || !*value) {
 				error("the profiles filter requires an argument");
 				return 1;
@@ -114,7 +114,7 @@ static int parse_filters(char *filters, struct btrfs_balance_args *args)
 				return 1;
 			}
 			args->flags |= BTRFS_BALANCE_ARGS_PROFILES;
-		} else if (!strcmp(this_char, "usage")) {
+		} else if (strcmp(this_char, "usage") == 0) {
 			if (!value || !*value) {
 				error("the usage filter requires an argument");
 				return 1;
@@ -142,7 +142,7 @@ static int parse_filters(char *filters, struct btrfs_balance_args *args)
 				args->flags |= BTRFS_BALANCE_ARGS_USAGE;
 			}
 			args->flags |= BTRFS_BALANCE_ARGS_USAGE;
-		} else if (!strcmp(this_char, "devid")) {
+		} else if (strcmp(this_char, "devid") == 0) {
 			if (!value || !*value) {
 				error("the devid filter requires an argument");
 				return 1;
@@ -152,7 +152,7 @@ static int parse_filters(char *filters, struct btrfs_balance_args *args)
 				return 1;
 			}
 			args->flags |= BTRFS_BALANCE_ARGS_DEVID;
-		} else if (!strcmp(this_char, "drange")) {
+		} else if (strcmp(this_char, "drange") == 0) {
 			if (!value || !*value) {
 				error("the drange filter requires an argument");
 				return 1;
@@ -162,7 +162,7 @@ static int parse_filters(char *filters, struct btrfs_balance_args *args)
 				return 1;
 			}
 			args->flags |= BTRFS_BALANCE_ARGS_DRANGE;
-		} else if (!strcmp(this_char, "vrange")) {
+		} else if (strcmp(this_char, "vrange") == 0) {
 			if (!value || !*value) {
 				error("the vrange filter requires an argument");
 				return 1;
@@ -172,7 +172,7 @@ static int parse_filters(char *filters, struct btrfs_balance_args *args)
 				return 1;
 			}
 			args->flags |= BTRFS_BALANCE_ARGS_VRANGE;
-		} else if (!strcmp(this_char, "convert")) {
+		} else if (strcmp(this_char, "convert") == 0) {
 			if (!value || !*value) {
 				error("the convert option requires an argument");
 				return 1;
@@ -182,9 +182,9 @@ static int parse_filters(char *filters, struct btrfs_balance_args *args)
 				return 1;
 			}
 			args->flags |= BTRFS_BALANCE_ARGS_CONVERT;
-		} else if (!strcmp(this_char, "soft")) {
+		} else if (strcmp(this_char, "soft") == 0) {
 			args->flags |= BTRFS_BALANCE_ARGS_SOFT;
-		} else if (!strcmp(this_char, "limit")) {
+		} else if (strcmp(this_char, "limit") == 0) {
 			if (!value || !*value) {
 				error("the limit filter requires an argument");
 				return 1;
@@ -202,7 +202,7 @@ static int parse_filters(char *filters, struct btrfs_balance_args *args)
 				args->flags &= ~BTRFS_BALANCE_ARGS_LIMIT_RANGE;
 				args->flags |= BTRFS_BALANCE_ARGS_LIMIT;
 			}
-		} else if (!strcmp(this_char, "stripes")) {
+		} else if (strcmp(this_char, "stripes") == 0) {
 			if (!value || !*value) {
 				error("the stripes filter requires an argument");
 				return 1;
@@ -376,6 +376,45 @@ static const char * const cmd_balance_start_usage[] = {
 	NULL
 };
 
+/*
+ * Return 0 if no missing device found for the fs at @mnt.
+ * Return >0 if there is any missing device for the fs at @mnt.
+ * Return <0 if we hit other errors during the check.
+ */
+static int check_missing_devices(const char *mnt)
+{
+	struct btrfs_ioctl_fs_info_args fs_info_arg = { 0 };
+	struct btrfs_ioctl_dev_info_args *dev_info_args = NULL;
+	bool found_missing = false;
+	int ret;
+
+	ret = get_fs_info(mnt, &fs_info_arg, &dev_info_args);
+	if (ret < 0)
+		return ret;
+
+	for (int i = 0; i < fs_info_arg.num_devices; i++) {
+		struct btrfs_ioctl_dev_info_args *cur_dev_info;
+		int fd;
+
+		cur_dev_info = (struct btrfs_ioctl_dev_info_args *)&dev_info_args[i];
+
+		/*
+		 * Kernel will report the device path even if we can no
+		 * longer access it anymore. So we have to manually check it.
+		 */
+		fd = open((char *)cur_dev_info->path, O_RDONLY);
+		if (fd < 0) {
+			found_missing = true;
+			break;
+		}
+		close(fd);
+	}
+	free(dev_info_args);
+	if (found_missing)
+		return 1;
+	return 0;
+}
+
 static int cmd_balance_start(const struct cmd_struct *cmd,
 			     int argc, char **argv)
 {
@@ -387,6 +426,7 @@ static int cmd_balance_start(const struct cmd_struct *cmd,
 	bool enqueue = false;
 	unsigned start_flags = 0;
 	bool raid56_warned = false;
+	bool convert_warned  = false;
 	int i;
 
 	memset(&args, 0, sizeof(args));
@@ -481,6 +521,53 @@ static int cmd_balance_start(const struct cmd_struct *cmd,
 		args.flags |= BTRFS_BALANCE_TYPE_MASK;
 	}
 
+	/*
+	 * If we are using convert, and there is a missing/failed device at
+	 * runtime (e.g. mounted then remove a device using sysfs interface),
+	 * btrfs has no way to avoid using that failing/removed device.
+	 *
+	 * In that case converting the profile is very dangerous, e.g.
+	 * converting RAID1 to SINGLE/DUP, and new SINGLE/DUP chunks can
+	 * be allocated to that failing/removed device, and cause the
+	 * fs to flip RO due to failed metadata writes.
+	 *
+	 * Meanwhile the fs may work completely fine due to the extra
+	 * duplication (e.g. all RAID1 profiles).
+	 *
+	 * So here warn if one is trying to convert with missing devices.
+	 */
+	for (i = 0; ptrs[i]; i++) {
+		int delay = 10;
+		int ret;
+
+		if (!(ptrs[i]->flags & BTRFS_BALANCE_ARGS_CONVERT) || convert_warned)
+			continue;
+
+		ret = check_missing_devices(argv[optind]);
+		if (ret < 0) {
+			errno = -ret;
+			warning("skipping missing devices check due to failure: %m");
+			break;
+		}
+		if (ret == 0)
+			continue;
+		convert_warned = true;
+		printf("WARNING:\n\n");
+		printf("\tConversion with missing device(s) can be dangerous.\n");
+		printf("\tPlease use 'btrfs replace' or 'btrfs device remove' instead.\n");
+		if (force) {
+			printf("\tSafety timeout skipped due to --force\n\n");
+			continue;
+		}
+		printf("\tThe operation will continue in %d seconds.\n", delay);
+		printf("\tUse Ctrl-C to stop.\n");
+		while (delay) {
+			printf("%2d", delay--);
+			fflush(stdout);
+			sleep(1);
+		}
+	}
+
 	/* drange makes sense only when devid is set */
 	for (i = 0; ptrs[i]; i++) {
 		if ((ptrs[i]->flags & BTRFS_BALANCE_ARGS_DRANGE) &&
diff --git a/cmds/device.c b/cmds/device.c
index 3e45a72094..58081c69d0 100644
--- a/cmds/device.c
+++ b/cmds/device.c
@@ -25,6 +25,7 @@
 #include <getopt.h>
 #include <dirent.h>
 #include <stdbool.h>
+#include "kernel-lib/list_sort.h"
 #include "kernel-shared/zoned.h"
 #include "common/string-table.h"
 #include "common/utils.h"
@@ -231,8 +232,7 @@ static int _cmd_device_remove(const struct cmd_struct *cmd,
 	/* Scan device arguments for 'cancel', that must be the only "device" */
 	for (i = optind; i < argc - 1; i++) {
 		if (cancel) {
-			error("cancel requested but another device specified: %s\n",
-				argv[i]);
+			error("cancel requested but another device specified: %s", argv[i]);
 			close(fdmnt);
 			return 1;
 		}
@@ -586,10 +586,13 @@ static const char * const cmd_device_stats_usage[] = {
 	"btrfs device stats [options] <path>|<device>",
 	"Show device IO error statistics",
 	"Show device IO error statistics for all devices of the given filesystem",
-	"identified by PATH or DEVICE. The filesystem must be mounted.",
+	"identified by PATH or DEVICE. On a mounted filesystem the stats are read",
+	"using ioctls, for direct read from file images or block devices use the",
+	"option --offline.",
 	"",
 	OPTLINE("-c|--check", "return non-zero if any stat counter is not zero"),
 	OPTLINE("-z|--reset", "show current stats and reset values to zero"),
+	OPTLINE("--offline", "read stats from file or device directly (not from mounted filesystem)"),
 	OPTLINE("-T", "show current stats in tabular format"),
 	HELPINFO_INSERT_GLOBALS,
 	HELPINFO_INSERT_FORMAT,
@@ -624,7 +627,7 @@ static int print_device_stat_string(struct format_ctx *fctx,
 		canonical_path = malloc(32);
 
 		if (!canonical_path) {
-			error_msg(ERROR_MSG_MEMORY, "device path buffer");
+			error_mem("device path buffer");
 			return -ENOMEM;
 		}
 
@@ -678,7 +681,7 @@ static int print_device_stat_tabular(struct string_table *table, int row,
 		canonical_path = malloc(32);
 
 		if (!canonical_path) {
-			error_msg(ERROR_MSG_MEMORY, "device path buffer");
+			error_mem("device path buffer");
 			return -ENOMEM;
 		}
 
@@ -702,28 +705,132 @@ static int print_device_stat_tabular(struct string_table *table, int row,
 	return err;
 }
 
+/*
+ * Offline version of GET_DEV_STATS ioctl.
+ */
+static int get_device_stats_offline(struct btrfs_fs_info *fs_info, u64 devid,
+				    struct btrfs_ioctl_get_dev_stats *stats_args)
+{
+	int ret = 0;
+	struct btrfs_path path = { 0 };
+	struct btrfs_key key;
+	struct btrfs_dev_stats_item *stats_item;
+
+	key.objectid = BTRFS_DEV_STATS_OBJECTID;
+	key.type = BTRFS_PERSISTENT_ITEM_KEY;
+	key.offset = devid;
+	ret = btrfs_search_slot(NULL, fs_info->dev_root, &key, &path, 0, 0);
+	if (ret < 0)
+		goto out;
+	if (ret > 0) {
+		pr_verbose(LOG_DEBUG, "no device stats found for devid %llu\n", devid);
+		ret = 0;
+		goto out;
+	}
+
+	memset(stats_args->values, 0, stats_args->nr_items * sizeof(u64));
+	stats_item = btrfs_item_ptr(path.nodes[0], path.slots[0], struct btrfs_dev_stats_item);
+
+	stats_args->values[BTRFS_DEV_STAT_WRITE_ERRS] =
+		btrfs_dev_stats_value(path.nodes[0], stats_item, BTRFS_DEV_STAT_WRITE_ERRS);
+	stats_args->values[BTRFS_DEV_STAT_READ_ERRS] =
+		btrfs_dev_stats_value(path.nodes[0], stats_item, BTRFS_DEV_STAT_READ_ERRS);
+	stats_args->values[BTRFS_DEV_STAT_FLUSH_ERRS] =
+		btrfs_dev_stats_value(path.nodes[0], stats_item, BTRFS_DEV_STAT_FLUSH_ERRS);
+	stats_args->values[BTRFS_DEV_STAT_CORRUPTION_ERRS] =
+		btrfs_dev_stats_value(path.nodes[0], stats_item, BTRFS_DEV_STAT_CORRUPTION_ERRS);
+	stats_args->values[BTRFS_DEV_STAT_GENERATION_ERRS] =
+		btrfs_dev_stats_value(path.nodes[0], stats_item, BTRFS_DEV_STAT_GENERATION_ERRS);
+
+out:
+	btrfs_release_path(&path);
+	return ret;
+}
+
+/*
+ * Offline version of get_fs_info() with limitations:
+ *
+ * - no seeding device support
+ * - fi_args filled only partially (num_devices)
+ */
+static int get_fs_info_offline(struct btrfs_fs_info *fs_info,
+			       struct btrfs_ioctl_fs_info_args *fi_args,
+			       struct btrfs_ioctl_dev_info_args **di_ret)
+{
+	int i;
+	struct btrfs_ioctl_dev_info_args *di_args;
+	struct btrfs_fs_devices *cur_fs;
+	struct btrfs_device *device;
+	struct list_head *fs_uuids;
+
+	fs_uuids = btrfs_scanned_uuids();
+	/* Count devices from fs_devices in case some of them are missing */
+	fi_args->num_devices = 0;
+	list_for_each_entry(cur_fs, fs_uuids, fs_list) {
+		if (memcmp(fs_info->fs_devices->fsid, cur_fs->fsid, BTRFS_FSID_SIZE) != 0)
+			continue;
+		list_for_each_entry(device, &cur_fs->devices, dev_list) {
+			fi_args->num_devices++;
+		}
+	}
+
+	di_args = malloc(fi_args->num_devices * sizeof(*di_args));
+	if (!di_args)
+		return -ENOMEM;
+
+	i = 0;
+	list_sort(NULL, &fs_info->fs_devices->devices, cmp_device_id);
+	list_for_each_entry(cur_fs, fs_uuids, fs_list) {
+		if (memcmp(fs_info->fs_devices->fsid, cur_fs->fsid, BTRFS_FSID_SIZE) != 0)
+			continue;
+
+		list_for_each_entry(device, &cur_fs->devices, dev_list) {
+			di_args[i].devid = device->devid;
+			memcpy(di_args[i].uuid, device->uuid, BTRFS_FSID_SIZE);
+			di_args[i].bytes_used = device->bytes_used;
+			di_args[i].total_bytes = device->total_bytes;
+			memcpy(di_args[i].fsid, cur_fs->fsid, BTRFS_FSID_SIZE);
+			/*
+			 * File devices without loop device or a missing device
+			 * don't have a path.
+			 */
+			if (device->name)
+				strncpy_null((char *)di_args[i].path, device->name,
+					     BTRFS_DEVICE_PATH_NAME_MAX + 1);
+			i++;
+		}
+	}
+
+	*di_ret = di_args;
+	return 0;
+}
+
 static int cmd_device_stats(const struct cmd_struct *cmd, int argc, char **argv)
 {
 	char *dev_path;
 	struct btrfs_ioctl_fs_info_args fi_args;
 	struct btrfs_ioctl_dev_info_args *di_args = NULL;
+	struct btrfs_fs_info *fs_info = NULL;
 	struct string_table *table = NULL;
 	int ret;
-	int fdmnt;
+	int fdmnt = -1;
 	int i;
 	int err = 0;
 	bool check = false;
 	bool free_table = false;
 	bool tabular = false;
+	bool opt_offline = false;
 	__u64 flags = 0;
 	struct format_ctx fctx;
 
 	optind = 0;
 	while (1) {
 		int c;
+		enum { GETOPT_VAL_OFFLINE = GETOPT_VAL_FIRST };
 		static const struct option long_options[] = {
 			{"check", no_argument, NULL, 'c'},
 			{"reset", no_argument, NULL, 'z'},
+			{"offline", no_argument, NULL, GETOPT_VAL_OFFLINE},
 			{NULL, 0, NULL, 0}
 		};
 
@@ -741,6 +848,9 @@ static int cmd_device_stats(const struct cmd_struct *cmd, int argc, char **argv)
 		case 'T':
 			tabular = true;
 			break;
+		case GETOPT_VAL_OFFLINE:
+			opt_offline = true;
+			break;
 		default:
 			usage_unknown_option(cmd, argv);
 		}
@@ -749,19 +859,48 @@ static int cmd_device_stats(const struct cmd_struct *cmd, int argc, char **argv)
 	if (check_argc_exact(argc - optind, 1))
 		return 1;
 
+	if (opt_offline && (flags & BTRFS_DEV_STATS_RESET)) {
+		error("--offline and --reset cannot be used together");
+		return 1;
+	}
+
 	dev_path = argv[optind];
 
-	fdmnt = btrfs_open_mnt(dev_path);
-	if (fdmnt < 0)
-		return 1;
+	if (!opt_offline) {
+		fdmnt = btrfs_open_mnt(dev_path);
+		if (fdmnt < 0) {
+			if (fdmnt == -ENOTDIR && !opt_offline)
+				error("to read device stats from a file image use --offline option");
+			return 1;
+		}
 
-	ret = get_fs_info(dev_path, &fi_args, &di_args);
-	if (ret) {
-		errno = -ret;
-		error("getting device info for %s failed: %m", dev_path);
-		err = 1;
-		goto out;
+		ret = get_fs_info(dev_path, &fi_args, &di_args);
+		if (ret) {
+			errno = -ret;
+			error("getting device info for %s failed: %m", dev_path);
+			err = 1;
+			goto out;
+		}
+	} else {
+		struct open_ctree_args oca = { 0 };
+
+		oca.filename = dev_path;
+		fs_info = open_ctree_fs_info(&oca);
+		if (!fs_info) {
+			error("cannot open filesystem on %s", dev_path);
+			err = 1;
+			goto out;
+		}
+
+		ret = get_fs_info_offline(fs_info, &fi_args, &di_args);
+		if (ret < 0) {
+			errno = -ret;
+			error("getting device info for %s failed: %m", dev_path);
+			err = 1;
+			goto out;
+		}
 	}
+
 	if (!fi_args.num_devices) {
 		error("no devices found");
 		err = 1;
@@ -775,7 +914,7 @@ static int cmd_device_stats(const struct cmd_struct *cmd, int argc, char **argv)
 		 */
 		table = table_create(7, fi_args.num_devices + 2);
 		if (!table) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			goto out;
 		}
 		free_table = true;
@@ -803,13 +942,28 @@ static int cmd_device_stats(const struct cmd_struct *cmd, int argc, char **argv)
 
 		args.devid = di_args[i].devid;
 		args.nr_items = BTRFS_DEV_STAT_VALUES_MAX;
-		args.flags = flags;
+		if (!opt_offline) {
+			args.flags = flags;
 
-		if (ioctl(fdmnt, BTRFS_IOC_GET_DEV_STATS, &args) < 0) {
-			error("device stats ioctl failed on %s: %m",
-			      path);
-			err |= 1;
-			goto out;
+			if (ioctl(fdmnt, BTRFS_IOC_GET_DEV_STATS, &args) < 0) {
+				error("device stats ioctl failed on %s: %m",
+				      path);
+				err |= 1;
+				goto out;
+			}
+		} else {
+			if (args.flags != 0) {
+				error("no flags supported");
+				err = -EINVAL;
+				goto out;
+			}
+			ret = get_device_stats_offline(fs_info, di_args[i].devid, &args);
+			if (ret < 0) {
+				error("cannot read offline stats for devid %llu",
+				      di_args[i].devid);
+				err = ret;
+				goto out;
+			}
 		}
 
 		if (tabular)
@@ -837,6 +991,8 @@ static int cmd_device_stats(const struct cmd_struct *cmd, int argc, char **argv)
 out:
 	free(di_args);
 	close(fdmnt);
+	if (fs_info)
+		close_ctree_fs_info(fs_info);
 	if (free_table)
 		table_free(table);
 
diff --git a/cmds/filesystem-usage.c b/cmds/filesystem-usage.c
index ed45f6e490..88da6b5dd1 100644
--- a/cmds/filesystem-usage.c
+++ b/cmds/filesystem-usage.c
@@ -84,7 +84,7 @@ static int add_info_to_list(struct array *chunkinfos, struct btrfs_chunk *chunk)
 
 			p = calloc(1, sizeof(struct chunk_info));
 			if (!p) {
-				error_msg(ERROR_MSG_MEMORY, NULL);
+				error_mem(NULL);
 				return -ENOMEM;
 			}
 			p->devid = devid;
@@ -94,7 +94,7 @@ static int add_info_to_list(struct array *chunkinfos, struct btrfs_chunk *chunk)
 
 			ret = array_append(chunkinfos, p);
 			if (ret < 0) {
-				error_msg(ERROR_MSG_MEMORY, NULL);
+				error_mem(NULL);
 				return -ENOMEM;
 			}
 		}
@@ -243,7 +243,7 @@ static struct btrfs_ioctl_space_args *load_space_info(int fd, const char *path)
 
 	sargs_orig = sargs = calloc(1, sizeof(struct btrfs_ioctl_space_args));
 	if (!sargs) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return NULL;
 	}
 
@@ -268,7 +268,7 @@ static struct btrfs_ioctl_space_args *load_space_info(int fd, const char *path)
 			(count * sizeof(struct btrfs_ioctl_space_info)));
 	if (!sargs) {
 		free(sargs_orig);
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return NULL;
 	}
 
@@ -417,6 +417,8 @@ static u64 get_first_device_zone_size(int fd)
 	}
 	while (1) {
 		de = readdir(dir);
+		if (!de)
+			break;
 		if (strcmp(".", de->d_name) == 0 || strcmp("..", de->d_name) == 0)
 			continue;
 		strcpy(name, de->d_name);
@@ -673,8 +675,7 @@ static int print_filesystem_usage_overall(int fd, const struct array *chunkinfos
 
 exit:
 
-	if (sargs)
-		free(sargs);
+	free(sargs);
 
 	return ret;
 }
@@ -806,7 +807,7 @@ static int load_device_info(int fd, struct array *devinfos)
 
 		info = calloc(1, sizeof(struct device_info));
 		if (!info) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			return 1;
 		}
 		ret = array_append(devinfos, info);
@@ -928,7 +929,7 @@ static void _cmd_filesystem_usage_tabular(unsigned unit_mode,
 
 	matrix = table_create(ncols, nrows);
 	if (!matrix) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return;
 	}
 
diff --git a/cmds/filesystem.c b/cmds/filesystem.c
index 40c4ee9d92..e28167a6ae 100644
--- a/cmds/filesystem.c
+++ b/cmds/filesystem.c
@@ -42,6 +42,7 @@
 #include "kernel-shared/compression.h"
 #include "kernel-shared/volumes.h"
 #include "kernel-shared/disk-io.h"
+#include "kernel-shared/transaction.h"
 #include "common/defs.h"
 #include "common/internal.h"
 #include "common/messages.h"
@@ -227,7 +228,7 @@ static int match_search_item_kernel(u8 *fsid, char *mnt, char *label,
 
 	search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
 	uuid_unparse(fsid, uuidbuf);
-	if (!strncmp(uuidbuf, search, search_len))
+	if (strncmp(uuidbuf, search, search_len) == 0)
 		return 1;
 
 	if (*label && strcmp(label, search) == 0)
@@ -248,7 +249,7 @@ static int uuid_search(struct btrfs_fs_devices *fs_devices, const char *search)
 
 	search_len = min(search_len, BTRFS_UUID_UNPARSED_SIZE);
 	uuid_unparse(fs_devices->fsid, uuidbuf);
-	if (!strncmp(uuidbuf, search, search_len))
+	if (strncmp(uuidbuf, search, search_len) == 0)
 		return 1;
 
 	list_for_each_entry(device, &fs_devices->devices, dev_list) {
@@ -580,7 +581,7 @@ static int find_and_copy_seed(struct btrfs_fs_devices *seed,
 	struct btrfs_fs_devices *cur_fs;
 
 	list_for_each_entry(cur_fs, fs_uuids, fs_list)
-		if (!memcmp(seed->fsid, cur_fs->fsid, BTRFS_FSID_SIZE))
+		if (memcmp(seed->fsid, cur_fs->fsid, BTRFS_FSID_SIZE) == 0)
 			return copy_fs_devices(copy, cur_fs);
 
 	return 1;
@@ -1287,22 +1288,236 @@ static const char * const cmd_filesystem_resize_usage[] = {
 	"[kK] means KiB, which denotes 1KiB = 1024B, 1MiB = 1024KiB, etc.",
 	"",
 	OPTLINE("--enqueue", "wait if there's another exclusive operation running, otherwise continue"),
+	OPTLINE("--offline", "resize an offline/unmounted filesystem (limitations: shrinking and multi-device not supported)"),
 	NULL
 };
 
+struct resize_args {
+	bool is_cancel;
+	bool specified_dev_id;
+	bool is_max;
+	u64 devid;
+	int mod;
+	u64 size;
+};
+
+static bool parse_resize_args(const char *amount, struct resize_args *ret)
+{
+	char amount_dup[BTRFS_VOL_NAME_MAX];
+	char *devstr;
+	char *sizestr;
+
+	ret->is_cancel = false;
+	if (strcmp("cancel", amount) == 0) {
+		ret->is_cancel = true;
+		return true;
+	}
+
+	if (strlen(amount) >= BTRFS_VOL_NAME_MAX) {
+		error("newsize argument is too long %zu >= %d", strlen(amount),
+		      BTRFS_VOL_NAME_MAX);
+		return false;
+	}
+	strncpy(amount_dup, amount, BTRFS_VOL_NAME_MAX);
+
+	sizestr = amount_dup;
+	devstr = strchr(sizestr, ':');
+	ret->specified_dev_id = false;
+	if (devstr) {
+		sizestr = devstr + 1;
+		*devstr = 0;
+		devstr = amount_dup;
+
+		errno = 0;
+		ret->specified_dev_id = true;
+		ret->devid = strtoull(devstr, NULL, 10);
+
+		if (errno) {
+			error("failed to parse devid %s: %m", devstr);
+			return false;
+		}
+	}
+
+	if (strcmp(sizestr, "max") == 0) {
+		ret->is_max = true;
+	} else {
+		ret->is_max = false;
+
+		ret->mod = 0;
+		if (sizestr[0] == '-') {
+			ret->mod = -1;
+			sizestr++;
+		} else if (sizestr[0] == '+') {
+			ret->mod = 1;
+			sizestr++;
+		}
+		if (parse_u64_with_suffix(sizestr, &ret->size) < 0) {
+			error("failed to parse size %s", sizestr);
+			return false;
+		}
+	}
+
+	return true;
+}
+
+static bool check_offline_resize_args(const char *path, const char *amount,
+				      const struct btrfs_fs_info *fs_info,
+				      struct btrfs_device **device_ret,
+				      u64 *new_size_ret)
+{
+	struct btrfs_device *device = NULL;
+	struct resize_args args;
+	struct stat stat_buf;
+	u64 new_size = 0, old_size = 0, device_size = 0;
+
+	if (check_mounted(path)) {
+		error("%s must not be mounted to use --offline", path);
+		return false;
+	}
+
+	if (fs_info->fs_devices->num_devices > 1) {
+		error("multi-device not supported with --offline");
+		return false;
+	}
+	device = list_first_entry_or_null(&fs_info->fs_devices->devices,
+					  struct btrfs_device, dev_list);
+	if (!device) {
+		error("no device found");
+		return false;
+	}
+	*device_ret = device;
+	old_size = device->total_bytes;
+
+	fstat(device->fd, &stat_buf);
+	if (device_get_partition_size_fd_stat(device->fd, &stat_buf, &device_size))
+		device_size = 0;
+	if (!device_size) {
+		error("unable to get size at path %s", device->name);
+		return false;
+	}
+
+	if (!parse_resize_args(amount, &args))
+		return false;
+
+	if (args.is_cancel) {
+		error("can not cancel --offline resize");
+		return false;
+	}
+	if (args.specified_dev_id && args.devid != device->devid) {
+		error("invalid device id %llu", args.devid);
+		return false;
+	}
+	if (args.is_max) {
+		new_size = device_size;
+	} else {
+		if (args.mod == 0) {
+			new_size = args.size;
+		} else if (args.mod < 0) {
+			error("offline resize does not support shrinking");
+			return false;
+		} else {
+			if (args.size > ULLONG_MAX - old_size) {
+				error("increasing (%llu) %s is out of range",
+				      args.size, pretty_size_mode(args.size, UNITS_DEFAULT));
+				return false;
+			}
+			new_size = old_size + args.size;
+		}
+	}
+	new_size = round_down(new_size, fs_info->sectorsize);
+	if (new_size < old_size) {
+		error("offline resize does not support shrinking");
+		return false;
+	}
+	*new_size_ret = new_size;
+
+	if (path_is_block_device(device->name) && new_size > device_size) {
+		error("unable to resize '%s': not enough free space", device->name);
+		return false;
+	}
+
+	if (new_size < 256 * SZ_1M)
+		warning("the new size %lld (%s) is < 256MiB, this may be rejected by kernel",
+			new_size, pretty_size_mode(new_size, UNITS_DEFAULT));
+
+	pr_verbose(LOG_DEFAULT, "Resize from %s to %s\n",
+		   pretty_size_mode(old_size, UNITS_DEFAULT),
+		   pretty_size_mode(new_size, UNITS_DEFAULT));
+	return true;
+}
+
+static bool offline_resize(const char *path, const char *amount)
+{
+	int ret = false;
+	struct btrfs_root *root;
+	struct btrfs_fs_info *fs_info;
+	struct btrfs_device *device;
+	struct btrfs_super_block *super;
+	struct btrfs_trans_handle *trans;
+	u64 new_size;
+	u64 old_total;
+	u64 diff;
+
+	root = open_ctree(path, 0, OPEN_CTREE_WRITES | OPEN_CTREE_CHUNK_ROOT_ONLY);
+	if (!root)
+		return false;
+	fs_info = root->fs_info;
+	super = fs_info->super_copy;
+
+	if (!check_offline_resize_args(path, amount, fs_info, &device, &new_size)) {
+		ret = false;
+		goto close;
+	}
+
+	trans = btrfs_start_transaction(root, 1);
+	if (IS_ERR(trans)) {
+		errno = -PTR_ERR(trans);
+		error_msg(ERROR_MSG_START_TRANS, "%m");
+		ret = false;
+		goto close;
+	}
+
+	old_total = btrfs_super_total_bytes(super);
+	diff = round_down(new_size - device->total_bytes, fs_info->sectorsize);
+	btrfs_set_super_total_bytes(super, round_down(old_total + diff, fs_info->sectorsize));
+	device->total_bytes = new_size;
+	ret = btrfs_update_device(trans, device);
+	if (ret) {
+		btrfs_abort_transaction(trans, ret);
+		ret = false;
+		goto close;
+	}
+
+	if (path_is_reg_file(device->name)) {
+		if (truncate(device->name, new_size)) {
+			error("unable to truncate %s to new size %llu", device->name, new_size);
+			btrfs_abort_transaction(trans, ret);
+			ret = false;
+			goto close;
+		}
+	}
+
+	if (btrfs_commit_transaction(trans, root)) {
+		ret = false;
+		goto close;
+	}
+
+	ret = true;
+close:
+	close_ctree(root);
+	return ret;
+}
+
 static int check_resize_args(const char *amount, const char *path, u64 *devid_ret)
 {
 	struct btrfs_ioctl_fs_info_args fi_args;
 	struct btrfs_ioctl_dev_info_args *di_args = NULL;
+	struct resize_args args;
 	int ret, i, dev_idx = -1;
-	u64 devid = 1;
 	u64 mindev = (u64)-1;
 	int mindev_idx = 0;
 	const char *res_str = NULL;
-	char *devstr = NULL, *sizestr = NULL;
-	u64 new_size = 0, old_size = 0, diff = 0;
-	int mod = 0;
-	char amount_dup[BTRFS_VOL_NAME_MAX];
+	u64 new_size = 0, old_size = 0;
 
 	*devid_ret = (u64)-1;
 	ret = get_fs_info(path, &fi_args, &di_args);
@@ -1317,37 +1532,20 @@ static int check_resize_args(const char *amount, const char *path, u64 *devid_re
 		goto out;
 	}
 
-	ret = snprintf(amount_dup, BTRFS_VOL_NAME_MAX, "%s", amount);
-	if (strlen(amount) != ret) {
-		error("newsize argument is too long");
+	if (!parse_resize_args(amount, &args)) {
 		ret = 1;
 		goto out;
 	}
-	ret = 0;
 
 	/* Cancel does not need to determine the device number. */
-	if (strcmp(amount, "cancel") == 0) {
+	if (args.is_cancel) {
 		/* Different format, print and exit */
 		pr_verbose(LOG_DEFAULT, "Request to cancel resize\n");
 		goto out;
 	}
 
-	sizestr = amount_dup;
-	devstr = strchr(sizestr, ':');
-	if (devstr) {
-		sizestr = devstr + 1;
-		*devstr = 0;
-		devstr = amount_dup;
-
-		errno = 0;
-		devid = strtoull(devstr, NULL, 10);
-
-		if (errno) {
-			error("failed to parse devid %s: %m", devstr);
-			ret = 1;
-			goto out;
-		}
-	}
+	if (!args.specified_dev_id)
+		args.devid = 1;
 
 	dev_idx = -1;
 	for(i = 0; i < fi_args.num_devices; i++) {
@@ -1355,18 +1553,18 @@ static int check_resize_args(const char *amount, const char *path, u64 *devid_re
 			mindev = di_args[i].devid;
 			mindev_idx = i;
 		}
-		if (di_args[i].devid == devid) {
+		if (di_args[i].devid == args.devid) {
 			dev_idx = i;
 			break;
 		}
 	}
 
-	if (devstr && dev_idx < 0) {
+	if (args.specified_dev_id && dev_idx < 0) {
 		/* Devid specified but not found. */
-		error("cannot find devid: %lld", devid);
+		error("cannot find devid: %llu", args.devid);
 		ret = 1;
 		goto out;
-	} else if (!devstr && devid == 1 && dev_idx < 0) {
+	} else if (!args.specified_dev_id && dev_idx < 0) {
 		/*
 		 * No device specified, assuming implicit 1 but it does not
 		 * exist. Use minimum device as fallback.
@@ -1374,7 +1572,7 @@ static int check_resize_args(const char *amount, const char *path, u64 *devid_re
 		warning("no devid specified means devid 1 which does not exist, using\n"
 			"\t lowest devid %llu as a fallback", mindev);
 		*devid_ret = mindev;
-		devid = mindev;
+		args.devid = mindev;
 		dev_idx = mindev_idx;
 	} else {
 		/*
@@ -1383,44 +1581,31 @@ static int check_resize_args(const char *amount, const char *path, u64 *devid_re
 		 */
 	}
 
-	if (strcmp(sizestr, "max") == 0) {
+	if (args.is_max) {
 		res_str = "max";
 	} else {
-		if (sizestr[0] == '-') {
-			mod = -1;
-			sizestr++;
-		} else if (sizestr[0] == '+') {
-			mod = 1;
-			sizestr++;
-		}
-		ret = parse_u64_with_suffix(sizestr, &diff);
-		if (ret < 0) {
-			error("failed to parse size %s", sizestr);
-			ret = 1;
-			goto out;
-		}
 		old_size = di_args[dev_idx].total_bytes;
 
 		/* For target sizes without +/- sign prefix (e.g. 1:150g) */
-		if (mod == 0) {
-			new_size = diff;
-		} else if (mod < 0) {
-			if (diff > old_size) {
+		if (args.mod == 0) {
+			new_size = args.size;
+		} else if (args.mod < 0) {
+			if (args.size > old_size) {
 				error("current size is %s which is smaller than %s",
 				      pretty_size_mode(old_size, UNITS_DEFAULT),
-				      pretty_size_mode(diff, UNITS_DEFAULT));
+				      pretty_size_mode(args.size, UNITS_DEFAULT));
 				ret = 1;
 				goto out;
 			}
-			new_size = old_size - diff;
-		} else if (mod > 0) {
-			if (diff > ULLONG_MAX - old_size) {
+			new_size = old_size - args.size;
+		} else if (args.mod > 0) {
+			if (args.size > ULLONG_MAX - old_size) {
 				error("increasing %s is out of range",
-				      pretty_size_mode(diff, UNITS_DEFAULT));
+				      pretty_size_mode(args.size, UNITS_DEFAULT));
 				ret = 1;
 				goto out;
 			}
-			new_size = old_size + diff;
+			new_size = old_size + args.size;
 		}
 		new_size = round_down(new_size, fi_args.sectorsize);
 		res_str = pretty_size_mode(new_size, UNITS_DEFAULT);
@@ -1430,7 +1615,7 @@ static int check_resize_args(const char *amount, const char *path, u64 *devid_re
 			new_size, pretty_size_mode(new_size, UNITS_DEFAULT));
 	}
 
-	pr_verbose(LOG_DEFAULT, "Resize device id %lld (%s) from %s to %s\n", devid,
+	pr_verbose(LOG_DEFAULT, "Resize device id %llu (%s) from %s to %s\n", args.devid,
 		di_args[dev_idx].path,
 		pretty_size_mode(di_args[dev_idx].total_bytes, UNITS_DEFAULT),
 		res_str);
@@ -1449,6 +1634,7 @@ static int cmd_filesystem_resize(const struct cmd_struct *cmd,
 	u64 devid;
 	int ret;
 	bool enqueue = false;
+	bool offline = false;
 	bool cancel = false;
 
 	/*
@@ -1458,6 +1644,8 @@ static int cmd_filesystem_resize(const struct cmd_struct *cmd,
 	for (optind = 1; optind < argc; optind++) {
 		if (strcmp(argv[optind], "--enqueue") == 0) {
 			enqueue = true;
+		} else if (strcmp(argv[optind], "--offline") == 0) {
+			offline = true;
 		} else if (strcmp(argv[optind], "--") == 0) {
 			/* Separator: options -- non-options */
 		} else if (strncmp(argv[optind], "--", 2) == 0) {
@@ -1472,6 +1660,11 @@ static int cmd_filesystem_resize(const struct cmd_struct *cmd,
 	if (check_argc_exact(argc - optind, 2))
 		return 1;
 
+	if (offline && enqueue) {
+		error("--enqueue is not compatible with --offline");
+		return 1;
+	}
+
 	amount = argv[optind];
 	path = argv[optind + 1];
 
@@ -1481,17 +1674,16 @@ static int cmd_filesystem_resize(const struct cmd_struct *cmd,
 		return 1;
 	}
 
+	if (offline)
+		return !offline_resize(path, amount);
+
 	cancel = (strcmp("cancel", amount) == 0);
 
 	fd = btrfs_open_dir(path);
 	if (fd < 0) {
-		/* The path is a directory */
-		if (fd == -ENOTDIR) {
-			error(
-		"resize works on mounted filesystems and accepts only\n"
-		"directories as argument. Passing file containing a btrfs image\n"
-		"would resize the underlying filesystem instead of the image.\n");
-		}
+		/* The path is not a directory. */
+		if (fd == -ENOTDIR)
+			error("to resize a file containing a BTRFS image use the --offline flag");
 		return 1;
 	}
 
@@ -1778,6 +1970,125 @@ static int cmd_filesystem_mkswapfile(const struct cmd_struct *cmd, int argc, cha
 }
 static DEFINE_SIMPLE_COMMAND(filesystem_mkswapfile, "mkswapfile");
 
+static const char * const cmd_filesystem_commit_stats_usage[] = {
+	"btrfs filesystem commit-stats <file>",
+	"Print number of commits and time stats since mount",
+	"",
+	OPTLINE("-z|--reset", "print stats and reset 'max_commit_ms' (needs root)"),
+	NULL
+};
+
+static int cmd_filesystem_commit_stats(const struct cmd_struct *cmd, int argc, char **argv)
+{
+	int ret;
+	int fd = -1;
+	int sysfs_fd = -1;
+	char buf[64 * 1024];
+	char *tmp, *ptr, *savepos = NULL;
+	uuid_t fsid;
+	bool opt_reset = false;
+	static const struct {
+		const char *key;
+		const char *desc;
+		const char *units;
+	} str2str[] = {
+		{ "commits", "Total commits:", NULL },
+		{ "last_commit_ms", "Last commit duration:", "ms" },
+		{ "max_commit_ms", "Max commit duration:", "ms" },
+		{ "total_commit_ms", "Total time spent in commit:", "ms" },
+	};
+
+	optind = 0;
+	while (1) {
+		int c;
+		static const struct option long_options[] = {
+			{ "reset", no_argument, NULL, 'z' },
+			{ NULL, 0, NULL, 0 }
+		};
+
+		c = getopt_long(argc, argv, "c", long_options, NULL);
+		if (c < 0)
+			break;
+		switch (c) {
+		case 'z':
+			opt_reset = true;
+			break;
+		default:
+			usage_unknown_option(cmd, argv);
+		}
+	}
+
+	if (check_argc_min(argc - optind, 1))
+		return 1;
+
+	fd = btrfs_open_dir(argv[optind]);
+	if (fd < 0)
+		return 1;
+
+	sysfs_fd = sysfs_open_fsid_file(fd, "commit_stats");
+	if (sysfs_fd < 0) {
+		error("no commit_stats file in sysfs");
+		goto out;
+	}
+
+	ret = sysfs_read_file(sysfs_fd, buf, sizeof(buf));
+	if (ret < 0) {
+		error("cannot read commit_stats: %m");
+		goto out;
+	}
+
+	ret = get_fsid_fd(fd, fsid);
+	/* Don't fail, sysfs_open_fsid_file() calls that as well. */
+	if (ret == 0) {
+		char fsid_str[BTRFS_UUID_UNPARSED_SIZE];
+
+		uuid_unparse(fsid, fsid_str);
+		pr_verbose(LOG_DEFAULT, "UUID: %s\n", fsid_str);
+	}
+	ptr = buf;
+	pr_verbose(LOG_DEFAULT, "Commit stats since mount:\n");
+	while (1) {
+		const char *units = NULL;
+
+		tmp = strtok_r(ptr, " \n", &savepos);
+		ptr = NULL;
+		if (!tmp)
+			break;
+
+		for (int i = 0; i < ARRAY_SIZE(str2str); i++) {
+			if (strcmp(tmp, str2str[i].key) == 0) {
+				tmp = (char *)str2str[i].desc;
+				units = str2str[i].units;
+				break;
+			}
+		}
+		/* Print unknown as-is */
+		pr_verbose(LOG_DEFAULT, "  %-28s", tmp);
+
+		tmp = strtok_r(ptr, " \n", &savepos);
+		if (!tmp)
+			break;
+		pr_verbose(LOG_DEFAULT, "%8s%s", tmp, (units ?: ""));
+		putchar('\n');
+	}
+
+	if (opt_reset) {
+		close(sysfs_fd);
+		ret = sysfs_write_fsid_file_u64(fd, "commit_stats", 0);
+		if (ret < 0)
+			warning("cannot reset stats: %m");
+		else
+			pr_verbose(LOG_DEFAULT, "NOTE: Max commit duration has been reset\n");
+	}
+
+out:
+	close(sysfs_fd);
+	close(fd);
+
+	return 0;
+}
+static DEFINE_SIMPLE_COMMAND(filesystem_commit_stats, "commit-stats");
+
 static const char filesystem_cmd_group_info[] =
 "overall filesystem tasks and information";
 
@@ -1786,6 +2097,7 @@ static const struct cmd_group filesystem_cmd_group = {
 		&cmd_struct_filesystem_df,
 		&cmd_struct_filesystem_du,
 		&cmd_struct_filesystem_show,
+		&cmd_struct_filesystem_commit_stats,
 		&cmd_struct_filesystem_sync,
 		&cmd_struct_filesystem_defrag,
 		&cmd_struct_filesystem_balance,
diff --git a/cmds/inspect.c b/cmds/inspect.c
index ce8b700ea0..14a2d7f417 100644
--- a/cmds/inspect.c
+++ b/cmds/inspect.c
@@ -944,7 +944,7 @@ static int print_list_chunks(struct list_chunks_ctx *ctx, const char *sortmode,
 	/* Two rows for header and separator. */
 	table = table_create(col_count, 2 + ctx->length);
 	if (!table) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return 1;
 	}
 	/* Print header */
@@ -1077,7 +1077,7 @@ static int cmd_inspect_list_chunks(const struct cmd_struct *cmd,
 	ctx.stats = calloc(ctx.size, sizeof(ctx.stats[0]));
 	if (!ctx.stats) {
 		ret = 1;
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		goto out;
 	}
 
@@ -1101,7 +1101,7 @@ static int cmd_inspect_list_chunks(const struct cmd_struct *cmd,
 	lnumber = calloc(lnumber_size, sizeof(u64));
 	if (!lnumber) {
 		ret = 1;
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		goto out;
 	}
 
@@ -1149,7 +1149,7 @@ static int cmd_inspect_list_chunks(const struct cmd_struct *cmd,
 					tmp = calloc(lnumber_size, sizeof(u64));
 					if (!tmp) {
 						ret = 1;
-						error_msg(ERROR_MSG_MEMORY, NULL);
+						error_mem(NULL);
 						goto out;
 					}
 					memcpy(tmp, lnumber, sizeof(u64) * old_size);
@@ -1168,7 +1168,7 @@ static int cmd_inspect_list_chunks(const struct cmd_struct *cmd,
 						* sizeof(ctx.stats[0]));
 					if (!ctx.stats) {
 						ret = 1;
-						error_msg(ERROR_MSG_MEMORY, NULL);
+						error_mem(NULL);
 						goto out;
 					}
 				}
diff --git a/cmds/property.c b/cmds/property.c
index d22e46c575..f67910c0f0 100644
--- a/cmds/property.c
+++ b/cmds/property.c
@@ -82,9 +82,9 @@ static int prop_read_only(enum prop_object_type type,
 		bool is_ro = false;
 		bool do_clear_received_uuid = false;
 
-		if (!strcmp(value, "true")) {
+		if (strcmp(value, "true") == 0) {
 			read_only = true;
-		} else if (!strcmp(value, "false")) {
+		} else if (strcmp(value, "false") == 0) {
 			read_only = false;
 		} else {
 			error("invalid value for property: %s", value);
@@ -273,7 +273,7 @@ static int parse_prop(const char *arg, const struct prop_handler *props,
 	const struct prop_handler *prop = props;
 
 	for (; prop->name; prop++) {
-		if (!strcmp(prop->name, arg)) {
+		if (strcmp(prop->name, arg) == 0) {
 			*prop_ret = prop;
 			return 0;
 		}
@@ -321,7 +321,7 @@ static int check_is_root(const char *object)
 		ret = -errno;
 		goto out;
 	}
-	if (!strcmp(rp, "/")) {
+	if (strcmp(rp, "/") == 0) {
 		ret = 0;
 		goto out;
 	}
@@ -541,16 +541,16 @@ static int parse_args(const struct cmd_struct *cmd, int argc, char **argv,
 
 	*types = 0;
 	if (type_str) {
-		if (!strcmp(type_str, "s") || !strcmp(type_str, "subvol")) {
+		if (strcmp(type_str, "s") == 0 || strcmp(type_str, "subvol") == 0) {
 			*types = prop_object_subvol;
-		} else if (!strcmp(type_str, "f") ||
-			   !strcmp(type_str, "filesystem")) {
+		} else if (strcmp(type_str, "f") == 0 ||
+			   strcmp(type_str, "filesystem") == 0) {
 			*types = prop_object_root;
-		} else if (!strcmp(type_str, "i") ||
-			   !strcmp(type_str, "inode")) {
+		} else if (strcmp(type_str, "i") == 0 ||
+			   strcmp(type_str, "inode") == 0) {
 			*types = prop_object_inode;
-		} else if (!strcmp(type_str, "d") ||
-			   !strcmp(type_str, "device")) {
+		} else if (strcmp(type_str, "d") == 0 ||
+			   strcmp(type_str, "device") == 0) {
 			*types = prop_object_dev;
 		} else {
 			error("invalid object type: %s", type_str);
diff --git a/cmds/qgroup.c b/cmds/qgroup.c
index 95acc93bd5..5e2b603410 100644
--- a/cmds/qgroup.c
+++ b/cmds/qgroup.c
@@ -456,8 +456,8 @@ static void print_table_head(void)
 		max_len = btrfs_qgroup_columns[i].max_len;
 		if (!btrfs_qgroup_columns[i].need_print)
 			continue;
-		if ((i == BTRFS_QGROUP_QGROUPID) | (i == BTRFS_QGROUP_PARENT) |
-			(i == BTRFS_QGROUP_CHILD))
+		if ((i == BTRFS_QGROUP_QGROUPID) || (i == BTRFS_QGROUP_PARENT) ||
+		    (i == BTRFS_QGROUP_CHILD))
 			printf("%-*s", max_len, btrfs_qgroup_columns[i].column_name);
 		else
 			printf("%*s", max_len, btrfs_qgroup_columns[i].column_name);
@@ -468,8 +468,8 @@ static void print_table_head(void)
 		max_len = btrfs_qgroup_columns[i].max_len;
 		if (!btrfs_qgroup_columns[i].need_print)
 			continue;
-		if ((i == BTRFS_QGROUP_QGROUPID) | (i == BTRFS_QGROUP_PARENT) |
-			(i == BTRFS_QGROUP_CHILD)) {
+		if ((i == BTRFS_QGROUP_QGROUPID) || (i == BTRFS_QGROUP_PARENT) ||
+		    (i == BTRFS_QGROUP_CHILD)) {
 			len = strlen(btrfs_qgroup_columns[i].column_name);
 			while (len--)
 				printf("-");
@@ -662,7 +662,7 @@ static struct btrfs_qgroup_comparer_set *qgroup_alloc_comparer_set(void)
 	       sizeof(struct btrfs_qgroup_comparer);
 	set = calloc(1, size);
 	if (!set) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		exit(1);
 	}
 
@@ -822,7 +822,7 @@ static struct btrfs_qgroup *get_or_add_qgroup(int fd,
 
 	bq = calloc(1, sizeof(*bq));
 	if (!bq) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return ERR_PTR(-ENOMEM);
 	}
 
@@ -939,7 +939,7 @@ static int update_qgroup_relation(struct qgroup_lookup *qgroup_lookup,
 
 	list = malloc(sizeof(*list));
 	if (!list) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return -ENOMEM;
 	}
 
@@ -970,8 +970,7 @@ static void __free_btrfs_qgroup(struct btrfs_qgroup *bq)
 		list_del(&list->next_member);
 		free(list);
 	}
-	if (bq->path)
-		free((void *)bq->path);
+	free((void *)bq->path);
 	free(bq);
 }
 
@@ -1075,7 +1074,7 @@ static struct btrfs_qgroup_filter_set *qgroup_alloc_filter_set(void)
 	       sizeof(struct btrfs_qgroup_filter);
 	set = calloc(1, size);
 	if (!set) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		exit(1);
 	}
 	set->total = BTRFS_QGROUP_NFILTERS_INCREASE;
@@ -1102,7 +1101,7 @@ static int qgroup_setup_filter(struct btrfs_qgroup_filter_set **filter_set,
 		tmp = set;
 		set = realloc(set, size);
 		if (!set) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			free(tmp);
 			exit(1);
 		}
diff --git a/cmds/quota.c b/cmds/quota.c
index 8023e9b21a..c01ba14d2c 100644
--- a/cmds/quota.c
+++ b/cmds/quota.c
@@ -20,15 +20,20 @@
 #include <sys/ioctl.h>
 #include <dirent.h>
 #include <errno.h>
+#include <ctype.h>
 #include <getopt.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdbool.h>
 #include <unistd.h>
 #include "kernel-shared/uapi/btrfs.h"
+#include "kernel-shared/uapi/btrfs_tree.h"
 #include "common/help.h"
 #include "common/open-utils.h"
 #include "common/messages.h"
+#include "common/sysfs-utils.h"
+#include "common/parse-utils.h"
+#include "common/string-utils.h"
 #include "cmds/commands.h"
 
 static const char * const quota_cmd_group_usage[] = {
@@ -238,6 +243,173 @@ static int cmd_quota_rescan(const struct cmd_struct *cmd, int argc, char **argv)
 }
 static DEFINE_SIMPLE_COMMAND(quota_rescan, "rescan");
 
+static const char * const cmd_quota_status_usage[] = {
+	"btrfs quota status <path>",
+	"Show status information about quota if enabled on the <path>.",
+	"",
+	OPTLINE("--is-enabled", "only check if quotas are enabled, not not print anything"),
+	NULL
+};
+
+static bool quota_is_enabled(const char *path)
+{
+	int fsfd = -1;
+	int dirfd = -1;
+	bool ret = true;
+
+	fsfd = btrfs_open_dir(path);
+	if (fsfd < 0)
+		return false;
+
+	dirfd = sysfs_open_fsid_dir(fsfd, "qgroups");
+	if (dirfd < 0) {
+		ret = false;
+		goto out;
+	}
+
+out:
+	close(fsfd);
+	close(dirfd);
+	return ret;
+}
+
+static const char *describe_mode(const char *mode)
+{
+	if (strcmp("qgroup", mode) == 0)
+		return "full accounting";
+	if (strcmp("squota", mode) == 0)
+		return "simplified accounting";
+	return "unknown mode";
+}
+
+static int cmd_quota_status(const struct cmd_struct *cmd, int argc, char **argv)
+{
+	int ret;
+	int fsfd = -1;
+	int dirfd = -1;
+	int fd = -1;
+	char buf[4096] = { 0 };
+	u64 num, num2;
+	DIR *dir = NULL;
+
+	optind = 0;
+	while (1) {
+		int c;
+		enum { GETOPT_VAL_IS_ENABLED = GETOPT_VAL_FIRST };
+		static const struct option long_options[] = {
+			{ "is-enabled", no_argument, NULL, GETOPT_VAL_IS_ENABLED },
+			{ NULL, 0, NULL, 0}
+		};
+
+		c = getopt_long(argc, argv, "", long_options, NULL);
+		if (c < 0)
+			break;
+		switch (c) {
+		case GETOPT_VAL_IS_ENABLED:
+			return quota_is_enabled(argv[optind]) ? 0 : 1;
+		default:
+			usage_unknown_option(cmd, argv);
+		}
+	}
+
+	if (check_argc_exact(argc - optind, 1))
+		return 1;
+
+	fsfd = btrfs_open_dir(argv[1]);
+	if (fsfd < 0)
+		return 1;
+
+	dirfd = sysfs_open_fsid_dir(fsfd, "qgroups");
+	pr_verbose(LOG_DEFAULT, "Quotas on %s:\n", argv[1]);
+	if (dirfd < 0) {
+		pr_verbose(LOG_DEFAULT, "  Enabled: no\n");
+		goto out;
+	}
+	pr_verbose(LOG_DEFAULT, "  Enabled:                 %s\n", "yes");
+
+	fd = sysfs_open_fsid_file(fsfd, "qgroups/mode");
+	if (fd < 0) {
+		error("cannot open file qgroups/mode: %m");
+		goto out;
+	}
+	ret = sysfs_read_file(fd, buf, sizeof(buf));
+	if (fd < 0) {
+		error("cannot read file qgroups/mode: %m");
+		goto out;
+	}
+	while (isspace(buf[strlen(buf) - 1]))
+		buf[strlen(buf) - 1] = 0;
+	pr_verbose(LOG_DEFAULT, "  Mode:                    %s (%s)\n", buf, describe_mode(buf));
+	close(fd);
+
+	ret = sysfs_read_fsid_file_u64(fsfd, "qgroups/inconsistent", &num);
+	if (ret < 0) {
+		error("cannot read file qgroups/inconsistent: %m");
+		goto out;
+	}
+	pr_verbose(LOG_DEFAULT, "  Inconsistent:            %s%s\n",
+		   (num ? "yes" : "no"), (num ? " (rescan needed)" : ""));
+
+	ret = sysfs_read_fsid_file_u64(fsfd, "quota_override", &num);
+	if (ret < 0) {
+		error("cannot read file qgroups/quota_override: %m");
+		goto out;
+	}
+	pr_verbose(LOG_DEFAULT, "  Override limits:         %s\n", (num ? "yes" : "no"));
+
+	ret = sysfs_read_fsid_file_u64(fsfd, "qgroups/drop_subtree_threshold", &num);
+	if (ret < 0) {
+		error("cannot read file qgroups/drop_subtree_threshold");
+		goto out;
+	}
+	pr_verbose(LOG_DEFAULT, "  Drop subtree threshold:  %llu\n", num);
+
+	/* Count */
+	dir = fdopendir(dirfd);
+	if (!dir) {
+		error("cannot open qgroups/ directory: %m");
+		goto out;
+	}
+	num = 0;
+	num2 = 0;
+	while (1) {
+		struct dirent *de;
+		u64 qgroupid;
+		char *str;
+
+		de = readdir(dir);
+		if (!de)
+			break;
+
+		str = de->d_name;
+		while (*str) {
+			if (*str == '_') {
+				*str = '/';
+				break;
+			}
+			str++;
+		}
+
+		ret = parse_qgroupid(de->d_name, &qgroupid);
+		if (ret < 0)
+			continue;
+
+		num++;
+		if (btrfs_qgroup_level(qgroupid) == 0)
+			num2++;
+	}
+	pr_verbose(LOG_DEFAULT, "  Total count:             %llu\n", num);
+	pr_verbose(LOG_DEFAULT, "  Level 0:                 %llu\n", num2);
+
+out:
+	if (dir)
+		closedir(dir);
+	close(dirfd);
+	close(fsfd);
+	return 0;
+}
+static DEFINE_SIMPLE_COMMAND(quota_status, "status");
+
 static const char quota_cmd_group_info[] =
 "manage filesystem quota settings";
 
@@ -246,6 +418,7 @@ static const struct cmd_group quota_cmd_group = {
 		&cmd_struct_quota_enable,
 		&cmd_struct_quota_disable,
 		&cmd_struct_quota_rescan,
+		&cmd_struct_quota_status,
 		NULL
 	}
 };
diff --git a/cmds/receive-dump.c b/cmds/receive-dump.c
index d62eaad996..89a4d5678a 100644
--- a/cmds/receive-dump.c
+++ b/cmds/receive-dump.c
@@ -35,7 +35,7 @@
 ({									\
 	ret = path_cat_out(outpath, path1, path2);			\
 	if (ret < 0) {							\
-		error("%s: path invalid: %s\n", function_name, path2);	\
+		error("%s: path invalid: %s", function_name, path2);	\
 		return ret;						\
 	}								\
 })
diff --git a/cmds/receive.c b/cmds/receive.c
index 4d6aef85bb..1a4a043b38 100644
--- a/cmds/receive.c
+++ b/cmds/receive.c
@@ -1023,7 +1023,7 @@ static int decompress_zlib(struct btrfs_receive *rctx, const char *encoded_data,
 		init = true;
 		rctx->zlib_stream = malloc(sizeof(z_stream));
 		if (!rctx->zlib_stream) {
-			error_msg(ERROR_MSG_MEMORY, "zlib stream: %m");
+			error_mem("zlib stream: %m");
 			return -ENOMEM;
 		}
 	}
@@ -1185,7 +1185,7 @@ static int decompress_and_write(struct btrfs_receive *rctx,
 
 	unencoded_data = calloc(unencoded_len, 1);
 	if (!unencoded_data) {
-		error_msg(ERROR_MSG_MEMORY, "unencoded data: %m");
+		error_mem("unencoded data: %m");
 		return -errno;
 	}
 
diff --git a/cmds/replace.c b/cmds/replace.c
index d5b0b0e02c..8dc7d6af25 100644
--- a/cmds/replace.c
+++ b/cmds/replace.c
@@ -359,8 +359,7 @@ static int cmd_replace_start(const struct cmd_struct *cmd,
 	return 0;
 
 leave_with_error:
-	if (dstdev)
-		free(dstdev);
+	free(dstdev);
 	if (fdmnt != -1)
 		close(fdmnt);
 	if (fddstdev != -1)
diff --git a/cmds/rescue-chunk-recover.c b/cmds/rescue-chunk-recover.c
index fc2493364a..9846c145f2 100644
--- a/cmds/rescue-chunk-recover.c
+++ b/cmds/rescue-chunk-recover.c
@@ -98,7 +98,7 @@ static struct extent_record *btrfs_new_extent_record(struct extent_buffer *eb)
 
 	rec = calloc(1, sizeof(*rec));
 	if (!rec) {
-		error_msg(ERROR_MSG_MEMORY, "extent record");
+		error_mem("extent record");
 		exit(1);
 	}
 
@@ -1476,7 +1476,7 @@ open_ctree_with_broken_chunk(struct recover_control *rc)
 
 	fs_info = btrfs_new_fs_info(1, BTRFS_SUPER_INFO_OFFSET);
 	if (!fs_info) {
-		error_msg(ERROR_MSG_MEMORY, "fs_info");
+		error_mem("fs_info");
 		return ERR_PTR(-ENOMEM);
 	}
 	fs_info->is_chunk_recover = 1;
@@ -1495,7 +1495,7 @@ open_ctree_with_broken_chunk(struct recover_control *rc)
 		goto out_devices;
 	}
 
-	UASSERT(!memcmp(disk_super->fsid, rc->fs_devices->fsid, BTRFS_FSID_SIZE));
+	UASSERT(memcmp(disk_super->fsid, rc->fs_devices->fsid, BTRFS_FSID_SIZE) == 0);
 	fs_info->sectorsize = btrfs_super_sectorsize(disk_super);
 	fs_info->nodesize = btrfs_super_nodesize(disk_super);
 	fs_info->stripesize = btrfs_super_stripesize(disk_super);
@@ -1507,9 +1507,9 @@ open_ctree_with_broken_chunk(struct recover_control *rc)
 	features = btrfs_super_incompat_flags(disk_super);
 
 	if (features & BTRFS_FEATURE_INCOMPAT_METADATA_UUID)
-		UASSERT(!memcmp(disk_super->metadata_uuid,
+		UASSERT(memcmp(disk_super->metadata_uuid,
 			       fs_info->fs_devices->metadata_uuid,
-			       BTRFS_FSID_SIZE));
+			       BTRFS_FSID_SIZE) == 0);
 
 	btrfs_setup_root(fs_info->chunk_root, fs_info,
 			 BTRFS_CHUNK_TREE_OBJECTID);
diff --git a/cmds/restore.c b/cmds/restore.c
index 464a70798a..87a98f7a50 100644
--- a/cmds/restore.c
+++ b/cmds/restore.c
@@ -198,7 +198,7 @@ static int decompress_zstd(const char *inbuf, char *outbuf, u64 compress_len,
 
 	zret = ZSTD_decompressStream(strm, &out, &in);
 	if (ZSTD_isError(zret)) {
-		error("zstd decompress failed %s\n", ZSTD_getErrorName(zret));
+		error("zstd decompress failed %s", ZSTD_getErrorName(zret));
 		ret = -1;
 		goto out;
 	}
@@ -325,7 +325,7 @@ static int copy_one_inline(struct btrfs_root *root, int fd,
 	ram_size = btrfs_file_extent_ram_bytes(leaf, fi);
 	outbuf = calloc(1, ram_size);
 	if (!outbuf) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return -ENOMEM;
 	}
 
@@ -393,14 +393,14 @@ static int copy_one_extent(struct btrfs_root *root, int fd,
 
 	inbuf = malloc(size_left);
 	if (!inbuf) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return -ENOMEM;
 	}
 
 	if (compress != BTRFS_COMPRESS_NONE) {
 		outbuf = calloc(1, ram_size);
 		if (!outbuf) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			free(inbuf);
 			return -ENOMEM;
 		}
@@ -1026,7 +1026,7 @@ static int search_dir(struct btrfs_root *root, struct btrfs_key *key,
 			char *dir = strdup(fs_name);
 
 			if (!dir) {
-				error_msg(ERROR_MSG_MEMORY, NULL);
+				error_mem(NULL);
 				ret = -ENOMEM;
 				goto out;
 			}
diff --git a/cmds/scrub.c b/cmds/scrub.c
index 30238c6813..3c94a197dd 100644
--- a/cmds/scrub.c
+++ b/cmds/scrub.c
@@ -663,7 +663,7 @@ static struct scrub_file_record **scrub_read_file(int fd, int report_errors)
 			++state;
 			fallthrough;
 		case 2: /* start of line, skip space */
-			while (isspace(l[i]) && i < avail) {
+			while (i < avail && isspace(l[i])) {
 				if (l[i] == '\n')
 					++lineno;
 				++i;
@@ -2168,7 +2168,7 @@ static int cmd_scrub_limit(const struct cmd_struct *cmd, int argc, char **argv)
 	cols = 3;
 	table = table_create(cols, 2 + fi_args.num_devices);
 	if (!table) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		ret = 1;
 		goto out;
 	}
diff --git a/cmds/subvolume-list.c b/cmds/subvolume-list.c
index 24e5c6856f..f8cae73d5d 100644
--- a/cmds/subvolume-list.c
+++ b/cmds/subvolume-list.c
@@ -394,7 +394,7 @@ static int btrfs_list_setup_comparer(struct btrfs_list_comparer_set **comp_set,
 		tmp = set;
 		set = realloc(set, size);
 		if (!set) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			free(tmp);
 			exit(1);
 		}
@@ -544,7 +544,7 @@ static int update_root(struct rb_root *root_lookup,
 
 		ri->name = malloc(name_len + 1);
 		if (!ri->name) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			exit(1);
 		}
 		strncpy_null(ri->name, name, name_len + 1);
@@ -607,7 +607,7 @@ static int add_root(struct rb_root *root_lookup,
 
 	ri = calloc(1, sizeof(*ri));
 	if (!ri) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		exit(1);
 	}
 	ri->root_id = root_id;
@@ -615,7 +615,7 @@ static int add_root(struct rb_root *root_lookup,
 	if (name && name_len > 0) {
 		ri->name = malloc(name_len + 1);
 		if (!ri->name) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			exit(1);
 		}
 		strncpy_null(ri->name, name, name_len + 1);
@@ -716,7 +716,7 @@ static int resolve_root(struct rb_root *rl, struct root_info *ri,
 			/* room for / and for null */
 			tmp = malloc(add_len + 2 + len);
 			if (!tmp) {
-				error_msg(ERROR_MSG_MEMORY, NULL);
+				error_mem(NULL);
 				exit(1);
 			}
 			memcpy(tmp + add_len + 1, full_path, len);
@@ -797,7 +797,7 @@ static int lookup_ino_path(int fd, struct root_info *ri)
 		 */
 		ri->path = malloc(strlen(ri->name) + strlen(args.name) + 1);
 		if (!ri->path) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			exit(1);
 		}
 		strcpy(ri->path, args.name);
@@ -993,7 +993,7 @@ static int filter_full_path(struct root_info *ri, u64 data)
 
 		tmp = malloc(len + add_len + 2);
 		if (!tmp) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			exit(1);
 		}
 		memcpy(tmp + add_len + 1, ri->full_path, len);
@@ -1054,7 +1054,7 @@ static void btrfs_list_setup_filter(struct btrfs_list_filter_set **filter_set,
 		tmp = set;
 		set = realloc(set, size);
 		if (!set) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			free(tmp);
 			exit(1);
 		}
@@ -1550,7 +1550,7 @@ static struct btrfs_list_filter_set *btrfs_list_alloc_filter_set(void)
 	       BTRFS_LIST_NFILTERS_INCREASE * sizeof(struct btrfs_list_filter);
 	set = calloc(1, size);
 	if (!set) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		exit(1);
 	}
 
@@ -1568,7 +1568,7 @@ static struct btrfs_list_comparer_set *btrfs_list_alloc_comparer_set(void)
 	       BTRFS_LIST_NCOMPS_INCREASE * sizeof(struct btrfs_list_comparer);
 	set = calloc(1, size);
 	if (!set) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		exit(1);
 	}
 
@@ -1579,8 +1579,8 @@ static struct btrfs_list_comparer_set *btrfs_list_alloc_comparer_set(void)
 
 static int cmd_subvolume_list(const struct cmd_struct *cmd, int argc, char **argv)
 {
-	struct btrfs_list_filter_set *filter_set;
-	struct btrfs_list_comparer_set *comparer_set;
+	struct btrfs_list_filter_set *filter_set = NULL;
+	struct btrfs_list_comparer_set *comparer_set = NULL;
 	u64 flags = 0;
 	int fd = -1;
 	u64 top_id;
@@ -1591,7 +1591,15 @@ static int cmd_subvolume_list(const struct cmd_struct *cmd, int argc, char **arg
 	enum btrfs_list_layout layout = BTRFS_LIST_LAYOUT_DEFAULT;
 
 	filter_set = btrfs_list_alloc_filter_set();
+	if (!filter_set) {
+		error_mem("allocating filter set");
+		return 1;
+	}
 	comparer_set = btrfs_list_alloc_comparer_set();
+	if (!comparer_set) {
+		error_mem("allocating comparator set");
+		return 1;
+	}
 
 	optind = 0;
 	while(1) {
@@ -1730,10 +1738,8 @@ static int cmd_subvolume_list(const struct cmd_struct *cmd, int argc, char **arg
 
 out:
 	close(fd);
-	if (filter_set)
-		free(filter_set);
-	if (comparer_set)
-		free(comparer_set);
+	free(filter_set);
+	free(comparer_set);
 	if (uerr)
 		usage(cmd, 1);
 	return !!ret;
diff --git a/cmds/subvolume.c b/cmds/subvolume.c
index 76175be644..f88c97e7da 100644
--- a/cmds/subvolume.c
+++ b/cmds/subvolume.c
@@ -145,26 +145,15 @@ static int create_one_subvolume(const char *dst, struct btrfs_util_qgroup_inheri
 				bool create_parents)
 {
 	int ret;
-	char	*dupname = NULL;
-	char	*dupdir = NULL;
+	char dupname[PATH_MAX];
+	char dupdir[PATH_MAX];
 	const char *newname;
-	char	*dstdir;
+	char *dstdir;
 	enum btrfs_util_error err;
 
-	dupname = strdup(dst);
-	if (!dupname) {
-		error_msg(ERROR_MSG_MEMORY, "duplicating %s", dst);
-		ret = -ENOMEM;
-		goto out;
-	}
+	strncpy_null(dupname, dst, PATH_MAX);
 	newname = path_basename(dupname);
-
-	dupdir = strdup(dst);
-	if (!dupdir) {
-		error_msg(ERROR_MSG_MEMORY, "duplicating %s", dst);
-		ret = -ENOMEM;
-		goto out;
-	}
+	strncpy_null(dupdir, dst, PATH_MAX);
 	dstdir = path_dirname(dupdir);
 
 	if (create_parents) {
@@ -210,8 +199,6 @@ static int create_one_subvolume(const char *dst, struct btrfs_util_qgroup_inheri
 	ret = 0;
 
 out:
-	free(dupname);
-	free(dupdir);
 
 	return ret;
 }
@@ -726,7 +713,7 @@ static int cmd_subvolume_snapshot(const struct cmd_struct *cmd, int argc, char *
 
 		dstdir = malloc(strlen(dst) + 1 + strlen(newname) + 1);
 		if (!dstdir) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			free(dupname);
 			goto out;
 		}
@@ -1023,7 +1010,7 @@ static char *__ino_resolve(int fd, u64 dirid)
 		 */
 		full = strdup(args.name);
 		if (!full) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			return ERR_PTR(-ENOMEM);
 		}
 	} else {
@@ -1108,7 +1095,7 @@ static char *ino_resolve(int fd, u64 ino, u64 *cache_dirid, char **cache_name)
 		name = (char *)(ref + 1);
 		name = strndup(name, namelen);
 		if (!name) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			return NULL;
 		}
 
@@ -1787,7 +1774,7 @@ static int cmd_subvolume_sync(const struct cmd_struct *cmd, int argc, char **arg
 	} else {
 		ids = malloc(id_count * sizeof(uint64_t));
 		if (!ids) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			ret = 1;
 			goto out;
 		}
diff --git a/common/device-scan.c b/common/device-scan.c
index 7d7d67fb5b..cf6c4a154c 100644
--- a/common/device-scan.c
+++ b/common/device-scan.c
@@ -294,8 +294,7 @@ int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
 			btrfs_super_magic(&disk_super) != BTRFS_MAGIC_TEMPORARY)
 		goto out;
 
-	if (!memcmp(disk_super.fsid, root->fs_info->super_copy->fsid,
-		    BTRFS_FSID_SIZE))
+	if (memcmp(disk_super.fsid, root->fs_info->super_copy->fsid, BTRFS_FSID_SIZE) == 0)
 		ret = 1;
 out:
 	return ret;
diff --git a/common/device-utils.c b/common/device-utils.c
index 51da85e978..9dfc502119 100644
--- a/common/device-utils.c
+++ b/common/device-utils.c
@@ -560,7 +560,7 @@ ssize_t btrfs_direct_pread(int fd, void *buf, size_t count, off_t offset)
 
 	ret = posix_memalign(&bounce_buf, alignment, iosize);
 	if (ret) {
-		error_msg(ERROR_MSG_MEMORY, "bounce buffer");
+		error_mem("bounce buffer");
 		errno = ret;
 		return -ret;
 	}
@@ -611,7 +611,7 @@ ssize_t btrfs_direct_pwrite(int fd, const void *buf, size_t count, off_t offset)
 
 	ret = posix_memalign(&bounce_buf, alignment, iosize);
 	if (ret) {
-		error_msg(ERROR_MSG_MEMORY, "bounce buffer");
+		error_mem("bounce buffer");
 		errno = ret;
 		return -ret;
 	}
diff --git a/common/filesystem-utils.c b/common/filesystem-utils.c
index 05451093a9..e323e37dac 100644
--- a/common/filesystem-utils.c
+++ b/common/filesystem-utils.c
@@ -172,7 +172,7 @@ int get_label_mounted(const char *mount_path, char *labelp)
 	int fd;
 	int ret;
 
-	fd = open(mount_path, O_RDONLY | O_NOATIME);
+	fd = open(mount_path, O_RDONLY);
 	if (fd < 0) {
 		error("unable to access %s: %m", mount_path);
 		return -1;
diff --git a/common/fsfeatures.c b/common/fsfeatures.c
index 776bb8a3f8..de79b112e3 100644
--- a/common/fsfeatures.c
+++ b/common/fsfeatures.c
@@ -361,12 +361,12 @@ static int parse_one_fs_feature(const char *name,
 	for (i = 0; i < array_size; i++) {
 		const struct btrfs_feature *feat = get_feature(i, source);
 
-		if (name[0] == '^' && !strcmp(feat->name, name + 1)) {
+		if (name[0] == '^' && strcmp(feat->name, name + 1) == 0) {
 			features->compat_ro_flags &= ~feat->compat_ro_flag;
 			features->incompat_flags &= ~feat->incompat_flag;
 			features->runtime_flags &= ~feat->runtime_flag;
 			found = 1;
-		} else if (!strcmp(feat->name, name)) {
+		} else if (strcmp(feat->name, name) == 0) {
 			features->compat_ro_flags |= feat->compat_ro_flag;
 			features->incompat_flags |= feat->incompat_flag;
 			features->runtime_flags |= feat->runtime_flag;
@@ -613,7 +613,7 @@ static bool check_supported_sectorsize(u32 sectorsize)
 		 * Also check the terminal '\0' to handle cases like
 		 * "4096" and "40960".
 		 */
-		if (!strncmp(this_char, sectorsize_buf, strlen(sectorsize_buf) + 1))
+		if (strncmp(this_char, sectorsize_buf, strlen(sectorsize_buf) + 1) == 0)
 			return true;
 	}
 	return false;
diff --git a/common/help.c b/common/help.c
index 4966022bc6..75162f02dc 100644
--- a/common/help.c
+++ b/common/help.c
@@ -532,7 +532,7 @@ void help_command_group(const struct cmd_group *grp, int argc, char **argv)
 	bool full = false;
 
 	if (argc > 1) {
-		if (!strcmp(argv[1], "--full"))
+		if (strcmp(argv[1], "--full") == 0)
 			full = 1;
 		/* The option --box is handled in the caller */
 	}
diff --git a/common/messages.h b/common/messages.h
index aced7c9bfa..e53ca32c2b 100644
--- a/common/messages.h
+++ b/common/messages.h
@@ -200,4 +200,7 @@ enum common_error {
 __attribute__ ((format (printf, 2, 3)))
 void error_msg(enum common_error error, const char *msg, ...);
 
+/* Shortcuts for most common errors. */
+#define error_mem(...)	error_msg(ERROR_MSG_MEMORY, ##__VA_ARGS__)
+
 #endif
diff --git a/common/send-stream.c b/common/send-stream.c
index c2ba495850..dacf0562f0 100644
--- a/common/send-stream.c
+++ b/common/send-stream.c
@@ -142,7 +142,7 @@ static int read_cmd(struct btrfs_send_stream *sctx)
 		if (!new_read_buf) {
 			ret = -ENOMEM;
 			errno = -ret;
-			error_msg(ERROR_MSG_MEMORY, "read buffer for command");
+			error_mem("read buffer for command");
 			goto out;
 		}
 		sctx->read_buf = new_read_buf;
@@ -633,7 +633,7 @@ int btrfs_read_and_process_send_stream(int fd,
 	sctx.read_buf = malloc(BTRFS_SEND_BUF_SIZE_V1);
 	if (!sctx.read_buf) {
 		ret = -ENOMEM;
-		error_msg(ERROR_MSG_MEMORY, "send stream read buffer");
+		error_mem("send stream read buffer");
 		goto out;
 	}
 	sctx.read_buf_size = BTRFS_SEND_BUF_SIZE_V1;
diff --git a/common/units.c b/common/units.c
index 27eac0987e..a9d8b5cb6b 100644
--- a/common/units.c
+++ b/common/units.c
@@ -169,47 +169,47 @@ unsigned int get_unit_mode_from_arg(int *argc, char *argv[], int df_mode)
 	int arg_end;
 
 	for (arg_i = 0; arg_i < *argc; arg_i++) {
-		if (!strcmp(argv[arg_i], "--"))
+		if (strcmp(argv[arg_i], "--") == 0)
 			break;
 
-		if (!strcmp(argv[arg_i], "--raw")) {
+		if (strcmp(argv[arg_i], "--raw") == 0) {
 			unit_mode = UNITS_RAW;
 			argv[arg_i] = NULL;
 			continue;
 		}
-		if (!strcmp(argv[arg_i], "--human-readable")) {
+		if (strcmp(argv[arg_i], "--human-readable") == 0) {
 			unit_mode = UNITS_HUMAN_BINARY;
 			argv[arg_i] = NULL;
 			continue;
 		}
 
-		if (!strcmp(argv[arg_i], "--iec")) {
+		if (strcmp(argv[arg_i], "--iec") == 0) {
 			units_set_mode(&unit_mode, UNITS_BINARY);
 			argv[arg_i] = NULL;
 			continue;
 		}
-		if (!strcmp(argv[arg_i], "--si")) {
+		if (strcmp(argv[arg_i], "--si") == 0) {
 			units_set_mode(&unit_mode, UNITS_DECIMAL);
 			argv[arg_i] = NULL;
 			continue;
 		}
 
-		if (!strcmp(argv[arg_i], "--kbytes")) {
+		if (strcmp(argv[arg_i], "--kbytes") == 0) {
 			units_set_base(&unit_mode, UNITS_KBYTES);
 			argv[arg_i] = NULL;
 			continue;
 		}
-		if (!strcmp(argv[arg_i], "--mbytes")) {
+		if (strcmp(argv[arg_i], "--mbytes") == 0) {
 			units_set_base(&unit_mode, UNITS_MBYTES);
 			argv[arg_i] = NULL;
 			continue;
 		}
-		if (!strcmp(argv[arg_i], "--gbytes")) {
+		if (strcmp(argv[arg_i], "--gbytes") == 0) {
 			units_set_base(&unit_mode, UNITS_GBYTES);
 			argv[arg_i] = NULL;
 			continue;
 		}
-		if (!strcmp(argv[arg_i], "--tbytes")) {
+		if (strcmp(argv[arg_i], "--tbytes") == 0) {
 			units_set_base(&unit_mode, UNITS_TBYTES);
 			argv[arg_i] = NULL;
 			continue;
@@ -218,37 +218,37 @@ unsigned int get_unit_mode_from_arg(int *argc, char *argv[], int df_mode)
 		if (!df_mode)
 			continue;
 
-		if (!strcmp(argv[arg_i], "-b")) {
+		if (strcmp(argv[arg_i], "-b") == 0) {
 			unit_mode = UNITS_RAW;
 			argv[arg_i] = NULL;
 			continue;
 		}
-		if (!strcmp(argv[arg_i], "-h")) {
+		if (strcmp(argv[arg_i], "-h") == 0) {
 			unit_mode = UNITS_HUMAN_BINARY;
 			argv[arg_i] = NULL;
 			continue;
 		}
-		if (!strcmp(argv[arg_i], "-H")) {
+		if (strcmp(argv[arg_i], "-H") == 0) {
 			unit_mode = UNITS_HUMAN_DECIMAL;
 			argv[arg_i] = NULL;
 			continue;
 		}
-		if (!strcmp(argv[arg_i], "-k")) {
+		if (strcmp(argv[arg_i], "-k") == 0) {
 			units_set_base(&unit_mode, UNITS_KBYTES);
 			argv[arg_i] = NULL;
 			continue;
 		}
-		if (!strcmp(argv[arg_i], "-m")) {
+		if (strcmp(argv[arg_i], "-m") == 0) {
 			units_set_base(&unit_mode, UNITS_MBYTES);
 			argv[arg_i] = NULL;
 			continue;
 		}
-		if (!strcmp(argv[arg_i], "-g")) {
+		if (strcmp(argv[arg_i], "-g") == 0) {
 			units_set_base(&unit_mode, UNITS_GBYTES);
 			argv[arg_i] = NULL;
 			continue;
 		}
-		if (!strcmp(argv[arg_i], "-t")) {
+		if (strcmp(argv[arg_i], "-t") == 0) {
 			units_set_base(&unit_mode, UNITS_TBYTES);
 			argv[arg_i] = NULL;
 			continue;
diff --git a/common/utils.c b/common/utils.c
index 9515abd47a..3f7bcc0d07 100644
--- a/common/utils.c
+++ b/common/utils.c
@@ -120,75 +120,6 @@ int get_df(int fd, struct btrfs_ioctl_space_args **sargs_ret)
 	return 0;
 }
 
-
-static u64 find_max_device_id(struct btrfs_tree_search_args *args, int nr_items)
-{
-	struct btrfs_dev_item *dev_item;
-	char *buf = btrfs_tree_search_data(args, 0);
-
-	buf += (nr_items - 1) * (sizeof(struct btrfs_ioctl_search_header)
-				       + sizeof(struct btrfs_dev_item));
-	buf += sizeof(struct btrfs_ioctl_search_header);
-
-	dev_item = (struct btrfs_dev_item *)buf;
-
-	return btrfs_stack_device_id(dev_item);
-}
-
-static int search_chunk_tree_for_fs_info(int fd,
-				struct btrfs_ioctl_fs_info_args *fi_args)
-{
-	int ret;
-	int max_items;
-	u64 start_devid = 1;
-	struct btrfs_tree_search_args args;
-	struct btrfs_ioctl_search_key *sk;
-
-	fi_args->num_devices = 0;
-
-	max_items = BTRFS_SEARCH_ARGS_BUFSIZE
-	       / (sizeof(struct btrfs_ioctl_search_header)
-			       + sizeof(struct btrfs_dev_item));
-
-	memset(&args, 0, sizeof(args));
-	sk = btrfs_tree_search_sk(&args);
-	sk->tree_id = BTRFS_CHUNK_TREE_OBJECTID;
-	sk->min_objectid = BTRFS_DEV_ITEMS_OBJECTID;
-	sk->min_type = BTRFS_DEV_ITEM_KEY;
-	sk->max_objectid = BTRFS_DEV_ITEMS_OBJECTID;
-	sk->max_type = BTRFS_DEV_ITEM_KEY;
-	sk->min_transid = 0;
-	sk->max_transid = (u64)-1;
-	sk->nr_items = max_items;
-	sk->max_offset = (u64)-1;
-
-again:
-	sk->min_offset = start_devid;
-
-	ret = btrfs_tree_search_ioctl(fd, &args);
-	if (ret < 0)
-		return -errno;
-
-	fi_args->num_devices += (u64)sk->nr_items;
-
-	if (sk->nr_items == max_items) {
-		start_devid = find_max_device_id(&args, sk->nr_items) + 1;
-		goto again;
-	}
-
-	/* Get the latest max_id to stay consistent with the num_devices */
-	if (sk->nr_items == 0)
-		/*
-		 * last tree_search returns an empty buf, use the devid of
-		 * the last dev_item of the previous tree_search
-		 */
-		fi_args->max_id = start_devid - 1;
-	else
-		fi_args->max_id = find_max_device_id(&args, sk->nr_items);
-
-	return 0;
-}
-
 /*
  * For a given path, fill in the ioctl fs_ and info_ args.
  * If the path is a btrfs mountpoint, fill info for all devices.
@@ -258,6 +189,8 @@ int get_fs_info(const char *path, struct btrfs_ioctl_fs_info_args *fi_args,
 
 	/* fill in fi_args if not just a single device */
 	if (fi_args->num_devices != 1) {
+		u64 count = 0;
+
 		ret = ioctl(fd, BTRFS_IOC_FS_INFO, fi_args);
 		if (ret < 0) {
 			ret = -errno;
@@ -265,16 +198,22 @@ int get_fs_info(const char *path, struct btrfs_ioctl_fs_info_args *fi_args,
 		}
 
 		/*
-		 * The fs_args->num_devices does not include seed devices
+		 * The fs_args->num_devices does not include seed devices,
+		 * so we count them manually.
 		 */
-		ret = search_chunk_tree_for_fs_info(fd, fi_args);
-		if (ret)
-			goto out;
+		for (u64 devid = 1; devid <= fi_args->max_id; devid++) {
+			struct btrfs_ioctl_dev_info_args args = { .devid = devid };
 
-		/*
-		 * search_chunk_tree_for_fs_info() will lacks the devid 0
-		 * so manual probe for it here.
-		 */
+			ret = ioctl(fd, BTRFS_IOC_DEV_INFO, &args);
+			if (ret == 0)
+				count++;
+		}
+		if (count > fi_args->num_devices) {
+			printf("found more devices than fs_info\n");
+			fi_args->num_devices = count;
+		}
+
+		/* We did not count devid 0, do another probe. */
 		ret = device_get_info(fd, 0, &tmp);
 		if (!ret) {
 			fi_args->num_devices++;
diff --git a/convert/main.c b/convert/main.c
index 0db32ca424..e279e3d40c 100644
--- a/convert/main.c
+++ b/convert/main.c
@@ -1224,8 +1224,8 @@ static int do_convert(const char *devname, u32 convert_flags, u32 nodesize,
 		goto fail;
 	}
 	btrfs_parse_fs_features_to_string(features_buf, features);
-	if (!memcmp(features, &btrfs_mkfs_default_features,
-		   sizeof(struct btrfs_mkfs_features)))
+	if (memcmp(features, &btrfs_mkfs_default_features,
+		   sizeof(struct btrfs_mkfs_features)) == 0)
 		strcat(features_buf, " (default)");
 
 	if (convert_flags & CONVERT_FLAG_COPY_FSID) {
diff --git a/convert/source-ext2.c b/convert/source-ext2.c
index fde3fff044..c6a27d48b5 100644
--- a/convert/source-ext2.c
+++ b/convert/source-ext2.c
@@ -224,7 +224,7 @@ static int ext2_dir_iterate_proc(ext2_ino_t dir, int entry,
 	name_len = dirent->name_len & 0xFF;
 
 	objectid = dirent->inode + INO_OFFSET;
-	if (!strncmp(dirent->name, dotdot, name_len)) {
+	if (strncmp(dirent->name, dotdot, name_len) == 0) {
 		if (name_len == 2) {
 			if (idata->parent != 0) {
 				error("dotdot entry parent not zero: %llu",
diff --git a/convert/source-reiserfs.c b/convert/source-reiserfs.c
index 82fc6afbf0..b4fe885136 100644
--- a/convert/source-reiserfs.c
+++ b/convert/source-reiserfs.c
@@ -833,8 +833,8 @@ static int reiserfs_copy_one_xattr(reiserfs_filsys_t fs,
 	body = xa_data->body + sizeof(struct reiserfs_xattr_header);
 	len = xa_data->len - sizeof(struct reiserfs_xattr_header);
 
-	if (!strncmp("system.posix_acl_default", name, namelen) ||
-	    !strncmp("system.posix_acl_access", name, namelen)) {
+	if (strncmp("system.posix_acl_default", name, namelen) == 0 ||
+	    strncmp("system.posix_acl_access", name, namelen) == 0) {
 		size_t bufsize = acl_ea_size(ext2_acl_count(len));
 		char *databuf = malloc(bufsize);
 
diff --git a/image/image-create.c b/image/image-create.c
index bfe6c93f6f..d172fcd389 100644
--- a/image/image-create.c
+++ b/image/image-create.c
@@ -68,7 +68,7 @@ static void *dump_worker(void *data)
 			async->bufsize = compressBound(async->size);
 			async->buffer = malloc(async->bufsize);
 			if (!async->buffer) {
-				error_msg(ERROR_MSG_MEMORY, "async buffer");
+				error_mem("async buffer");
 				pthread_mutex_lock(&md->mutex);
 				if (!md->error)
 					md->error = -ENOMEM;
diff --git a/image/image-restore.c b/image/image-restore.c
index 667b981123..e633b368f3 100644
--- a/image/image-restore.c
+++ b/image/image-restore.c
@@ -564,7 +564,7 @@ static void *restore_worker(void *data)
 
 	buffer = malloc(buffer_size);
 	if (!buffer) {
-		error_msg(ERROR_MSG_MEMORY, "restore worker buffer");
+		error_mem("restore worker buffer");
 		pthread_mutex_lock(&mdres->mutex);
 		if (!mdres->error)
 			mdres->error = -ENOMEM;
@@ -795,7 +795,7 @@ static int read_chunk_tree_block(struct mdrestore_struct *mdres,
 
 		fs_chunk = malloc(sizeof(struct fs_chunk));
 		if (!fs_chunk) {
-			error_msg(ERROR_MSG_MEMORY, "allocate chunk");
+			error_mem("allocate chunk");
 			return -ENOMEM;
 		}
 		memset(fs_chunk, 0, sizeof(*fs_chunk));
@@ -957,13 +957,13 @@ static int search_for_chunk_blocks(struct mdrestore_struct *mdres)
 
 	cluster = malloc(IMAGE_BLOCK_SIZE);
 	if (!cluster) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return -ENOMEM;
 	}
 
 	buffer = malloc(max_size);
 	if (!buffer) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		free(cluster);
 		return -ENOMEM;
 	}
@@ -971,7 +971,7 @@ static int search_for_chunk_blocks(struct mdrestore_struct *mdres)
 	if (mdres->compress_method == COMPRESS_ZLIB) {
 		tmp = malloc(max_size);
 		if (!tmp) {
-			error_msg(ERROR_MSG_MEMORY, NULL);
+			error_mem(NULL);
 			free(cluster);
 			free(buffer);
 			return -ENOMEM;
@@ -1143,7 +1143,7 @@ static int build_chunk_tree(struct mdrestore_struct *mdres,
 
 	buffer = malloc(get_unaligned_le32(&item->size));
 	if (!buffer) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return -ENOMEM;
 	}
 
@@ -1306,14 +1306,14 @@ static int add_cluster(struct meta_cluster *cluster,
 		item = &cluster->items[i];
 		async = calloc(1, sizeof(*async));
 		if (!async) {
-			error_msg(ERROR_MSG_MEMORY, "async data");
+			error_mem("async data");
 			return -ENOMEM;
 		}
 		async->start = get_unaligned_le64(&item->bytenr);
 		async->bufsize = get_unaligned_le32(&item->size);
 		async->buffer = malloc(async->bufsize);
 		if (!async->buffer) {
-			error_msg(ERROR_MSG_MEMORY, "async buffer");
+			error_mem("async buffer");
 			free(async);
 			return -ENOMEM;
 		}
@@ -1774,7 +1774,7 @@ int restore_metadump(const char *input, FILE *out, int old_restore,
 	FILE *in = NULL;
 	int ret = 0;
 
-	if (!strcmp(input, "-")) {
+	if (strcmp(input, "-") == 0) {
 		in = stdin;
 	} else {
 		in = fopen(input, "r");
@@ -1802,7 +1802,7 @@ int restore_metadump(const char *input, FILE *out, int old_restore,
 
 	cluster = malloc(IMAGE_BLOCK_SIZE);
 	if (!cluster) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		ret = -ENOMEM;
 		goto failed_info;
 	}
diff --git a/image/sanitize.c b/image/sanitize.c
index ef4f6e5156..f2f49c14f0 100644
--- a/image/sanitize.c
+++ b/image/sanitize.c
@@ -263,7 +263,7 @@ static char *find_collision(struct rb_root *name_tree, char *name,
 
 	val = malloc(sizeof(struct name));
 	if (!val) {
-		error_msg(ERROR_MSG_MEMORY, "sanitize name");
+		error_mem("sanitize name");
 		free(name);
 		return NULL;
 	}
@@ -274,7 +274,7 @@ static char *find_collision(struct rb_root *name_tree, char *name,
 	val->len = name_len;
 	val->sub = malloc(name_len);
 	if (!val->sub) {
-		error_msg(ERROR_MSG_MEMORY, "sanitize name");
+		error_mem("sanitize name");
 		free(val);
 		free(name);
 		return NULL;
@@ -343,7 +343,7 @@ static void sanitize_dir_item(enum sanitize_mode sanitize,
 		if (sanitize == SANITIZE_COLLISIONS) {
 			buf = malloc(name_len);
 			if (!buf) {
-				error_msg(ERROR_MSG_MEMORY, "sanitize name");
+				error_mem("sanitize name");
 				return;
 			}
 			read_extent_buffer(eb, buf, name_ptr, name_len);
@@ -352,7 +352,7 @@ static void sanitize_dir_item(enum sanitize_mode sanitize,
 			garbage = generate_garbage(name_len);
 		}
 		if (!garbage) {
-			error_msg(ERROR_MSG_MEMORY, "sanitize name");
+			error_mem("sanitize name");
 			return;
 		}
 		write_extent_buffer(eb, garbage, name_ptr, name_len);
@@ -398,7 +398,7 @@ static void sanitize_inode_ref(enum sanitize_mode sanitize,
 		if (sanitize == SANITIZE_COLLISIONS) {
 			buf = malloc(len);
 			if (!buf) {
-				error_msg(ERROR_MSG_MEMORY, "sanitize name");
+				error_mem("sanitize name");
 				return;
 			}
 			read_extent_buffer(eb, buf, name_ptr, len);
@@ -408,7 +408,7 @@ static void sanitize_inode_ref(enum sanitize_mode sanitize,
 		}
 
 		if (!garbage) {
-			error_msg(ERROR_MSG_MEMORY, "sanitize name");
+			error_mem("sanitize name");
 			return;
 		}
 		write_extent_buffer(eb, garbage, name_ptr, len);
@@ -454,7 +454,7 @@ void sanitize_name(enum sanitize_mode sanitize, struct rb_root *name_tree,
 
 	eb = alloc_dummy_eb(src->start, src->len);
 	if (!eb) {
-		error_msg(ERROR_MSG_MEMORY, "sanitize name");
+		error_mem("sanitize name");
 		return;
 	}
 
diff --git a/kernel-shared/ctree.c b/kernel-shared/ctree.c
index a08c9c2ff5..467db003c7 100644
--- a/kernel-shared/ctree.c
+++ b/kernel-shared/ctree.c
@@ -670,13 +670,7 @@ int btrfs_cow_block(struct btrfs_trans_handle *trans,
 {
 	u64 search_start;
 	int ret;
-	/*
-	if (trans->transaction != root->fs_info->running_transaction) {
-		printk(KERN_CRIT "trans %llu running %llu\n", trans->transid,
-		       root->fs_info->running_transaction->transid);
-		WARN_ON(1);
-	}
-	*/
+
 	if (trans->transid != root->fs_info->generation) {
 		printk(KERN_CRIT "trans %llu running %llu\n",
 			(unsigned long long)trans->transid,
diff --git a/kernel-shared/ctree.h b/kernel-shared/ctree.h
index b08e078b5a..07334208ab 100644
--- a/kernel-shared/ctree.h
+++ b/kernel-shared/ctree.h
@@ -69,8 +69,6 @@ static inline u32 __BTRFS_LEAF_DATA_SIZE(u32 nodesize)
 #define BTRFS_MIN_BLOCKSIZE	(SZ_4K)
 #endif
 
-#define BTRFS_LEAF_DATA_SIZE(fs_info) (fs_info->leaf_data_size)
-
 #define BTRFS_SUPER_INFO_OFFSET			(65536)
 #define BTRFS_SUPER_INFO_SIZE			(4096)
 
@@ -401,7 +399,6 @@ struct btrfs_fs_info {
 	u32 nodesize;
 	u32 sectorsize;
 	u32 stripesize;
-	u32 leaf_data_size;
 
 	/*
 	 * For open_ctree_fs_info() to hold the initial fd until close.
@@ -426,6 +423,11 @@ struct btrfs_fs_info {
 	struct super_block *sb;
 };
 
+static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *fs_info)
+{
+	return __BTRFS_LEAF_DATA_SIZE(fs_info->nodesize);
+}
+
 static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info)
 {
 	return fs_info->zoned != 0;
diff --git a/kernel-shared/disk-io.c b/kernel-shared/disk-io.c
index 3bf1ff7a89..dff800f55a 100644
--- a/kernel-shared/disk-io.c
+++ b/kernel-shared/disk-io.c
@@ -194,7 +194,7 @@ static int __csum_tree_block_size(struct extent_buffer *buf, u16 csum_size,
 
 	if (verify) {
 		if (buf->fs_info && buf->fs_info->skip_csum_check) {
-			/* printf("skip csum check for block %llu\n", buf->start); */
+			/* Skip csum check for block buf->start. */
 		} else if (memcmp_extent_buffer(buf, result, 0, csum_size)) {
 			if (!silent) {
 				char found[BTRFS_CSUM_STRING_LEN];
@@ -1439,6 +1439,7 @@ int btrfs_setup_chunk_tree_and_device_map(struct btrfs_fs_info *fs_info,
 {
 	struct btrfs_super_block *sb = fs_info->super_copy;
 	u64 generation;
+	u8 level;
 	int ret;
 
 	btrfs_setup_root(fs_info->chunk_root, fs_info,
@@ -1448,8 +1449,6 @@ int btrfs_setup_chunk_tree_and_device_map(struct btrfs_fs_info *fs_info,
 	if (ret)
 		return ret;
 
-	generation = btrfs_super_chunk_root_generation(sb);
-
 	if (chunk_root_bytenr && !IS_ALIGNED(chunk_root_bytenr,
 					    fs_info->sectorsize)) {
 		warning("chunk_root_bytenr %llu is unaligned to %u, ignore it",
@@ -1457,13 +1456,28 @@ int btrfs_setup_chunk_tree_and_device_map(struct btrfs_fs_info *fs_info,
 		chunk_root_bytenr = 0;
 	}
 
-	if (!chunk_root_bytenr)
-		chunk_root_bytenr = btrfs_super_chunk_root(sb);
-	else
+	if (chunk_root_bytenr) {
+		struct extent_buffer *eb;
+		struct btrfs_tree_parent_check check = { 0 };
+
 		generation = 0;
+		eb = read_tree_block(fs_info, chunk_root_bytenr, &check);
+		if (IS_ERR(eb)) {
+			ret = PTR_ERR(eb);
+			errno = -ret;
+			error("unable to read tree block at %llu: %m", chunk_root_bytenr);
+			return ret;
+		}
+		level = btrfs_header_level(eb);
+		free_extent_buffer(eb);
+	} else {
+		chunk_root_bytenr = btrfs_super_chunk_root(sb);
+		generation = btrfs_super_chunk_root_generation(sb);
+		level = btrfs_super_chunk_root_level(sb);
+	}
 
 	ret = read_root_node(fs_info, fs_info->chunk_root, chunk_root_bytenr,
-			     generation, btrfs_super_chunk_root_level(sb));
+			     generation, level);
 	if (ret) {
 		if (fs_info->ignore_chunk_tree_error) {
 			warning("cannot read chunk root, continue anyway");
@@ -1506,7 +1520,7 @@ static struct btrfs_fs_info *__open_ctree_fd(int fp, struct open_ctree_args *oca
 
 	fs_info = btrfs_new_fs_info(flags & OPEN_CTREE_WRITES, sb_bytenr);
 	if (!fs_info) {
-		error_msg(ERROR_MSG_MEMORY, "fs_info");
+		error_mem("fs_info");
 		return NULL;
 	}
 	if (flags & OPEN_CTREE_RESTORE)
@@ -1580,17 +1594,16 @@ static struct btrfs_fs_info *__open_ctree_fd(int fp, struct open_ctree_args *oca
 
 	/* CHECK: ignore_csum_mismatch */
 
-	ASSERT(!memcmp(disk_super->fsid, fs_devices->fsid, BTRFS_FSID_SIZE));
+	ASSERT(memcmp(disk_super->fsid, fs_devices->fsid, BTRFS_FSID_SIZE) == 0);
 	if (btrfs_fs_incompat(fs_info, METADATA_UUID))
-		ASSERT(!memcmp(disk_super->metadata_uuid,
-			       fs_devices->metadata_uuid, BTRFS_FSID_SIZE));
+		ASSERT(memcmp(disk_super->metadata_uuid, fs_devices->metadata_uuid,
+			      BTRFS_FSID_SIZE) == 0);
 
 	fs_info->sectorsize = btrfs_super_sectorsize(disk_super);
 	fs_info->nodesize = btrfs_super_nodesize(disk_super);
 	fs_info->stripesize = btrfs_super_stripesize(disk_super);
 	fs_info->csum_type = btrfs_super_csum_type(disk_super);
 	fs_info->csum_size = btrfs_super_csum_size(disk_super);
-	fs_info->leaf_data_size = __BTRFS_LEAF_DATA_SIZE(fs_info->nodesize);
 
 	ret = btrfs_check_fs_compatibility(fs_info->super_copy, flags);
 	if (ret)
diff --git a/kernel-shared/extent_io.c b/kernel-shared/extent_io.c
index cb3f2a201e..cb48699c2e 100644
--- a/kernel-shared/extent_io.c
+++ b/kernel-shared/extent_io.c
@@ -513,7 +513,7 @@ int write_data_to_disk(struct btrfs_fs_info *info, const void *buf, u64 offset,
 
 			eb = kmalloc(sizeof(struct extent_buffer) + this_len, GFP_KERNEL);
 			if (!eb) {
-				error_msg(ERROR_MSG_MEMORY, "extent buffer");
+				error_mem("extent buffer");
 				ret = -ENOMEM;
 				goto out;
 			}
diff --git a/kernel-shared/file-item.c b/kernel-shared/file-item.c
index 6b7c47ce64..c6cd3ce511 100644
--- a/kernel-shared/file-item.c
+++ b/kernel-shared/file-item.c
@@ -203,7 +203,6 @@ int btrfs_csum_file_block(struct btrfs_trans_handle *trans, u64 logical,
 	if (ret == -EFBIG) {
 		u32 item_size;
 
-		/* printf("item not big enough for bytenr %llu\n", bytenr); */
 		/* we found one, but it isn't big enough yet */
 		leaf = path->nodes[0];
 		item_size = btrfs_item_size(leaf, path->slots[0]);
diff --git a/kernel-shared/print-tree.c b/kernel-shared/print-tree.c
index f3ec0c5cfc..2a624a1cc3 100644
--- a/kernel-shared/print-tree.c
+++ b/kernel-shared/print-tree.c
@@ -1906,7 +1906,7 @@ static int check_csum_sblock(void *sb, int csum_size, u16 csum_type)
 	btrfs_csum_data(csum_type, (u8 *)sb + BTRFS_CSUM_SIZE,
 			result, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
 
-	return !memcmp(sb, result, csum_size);
+	return (memcmp(sb, result, csum_size) == 0);
 }
 
 #define DEF_COMPAT_RO_FLAG_ENTRY(bit_name)		\
@@ -2030,7 +2030,7 @@ static void print_sys_chunk_array(struct btrfs_super_block *sb)
 
 	buf = alloc_dummy_extent_buffer(NULL, 0, BTRFS_SUPER_INFO_SIZE);
 	if (!buf) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return;
 	}
 	write_extent_buffer(buf, sb, 0, sizeof(*sb));
@@ -2290,10 +2290,10 @@ void btrfs_print_superblock(struct btrfs_super_block *sb, int full)
 
 	uuid_unparse(sb->dev_item.fsid, buf);
 	if (metadata_uuid_present) {
-		cmp_res = !memcmp(sb->dev_item.fsid, sb->metadata_uuid,
-				 BTRFS_FSID_SIZE);
+		cmp_res = (memcmp(sb->dev_item.fsid, sb->metadata_uuid,
+				 BTRFS_FSID_SIZE) == 0);
 	} else {
-		cmp_res = !memcmp(sb->dev_item.fsid, sb->fsid, BTRFS_FSID_SIZE);
+		cmp_res = (memcmp(sb->dev_item.fsid, sb->fsid, BTRFS_FSID_SIZE) == 0);
 	}
 	printf("dev_item.fsid\t\t%s %s\n", buf,
 	       cmp_res ? "[match]" : "[DON'T MATCH]");
diff --git a/kernel-shared/volumes.c b/kernel-shared/volumes.c
index 0608933ebc..0a73012814 100644
--- a/kernel-shared/volumes.c
+++ b/kernel-shared/volumes.c
@@ -314,7 +314,7 @@ static struct btrfs_device *find_device(struct btrfs_fs_devices *fs_devices,
 
 	list_for_each_entry(dev, head, dev_list) {
 		if (dev->devid == devid &&
-		    (!uuid || !memcmp(dev->uuid, uuid, BTRFS_UUID_SIZE))) {
+		    (!uuid || memcmp(dev->uuid, uuid, BTRFS_UUID_SIZE) == 0)) {
 			return dev;
 		}
 	}
@@ -2321,7 +2321,7 @@ struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
 	cur_devices = fs_info->fs_devices;
 	while (cur_devices) {
 		if (!fsid ||
-		    (!memcmp(cur_devices->metadata_uuid, fsid, BTRFS_FSID_SIZE) ||
+		    (memcmp(cur_devices->metadata_uuid, fsid, BTRFS_FSID_SIZE) == 0 ||
 		     fs_info->ignore_fsid_mismatch)) {
 			device = find_device(cur_devices, devid, uuid);
 			if (device)
@@ -2502,7 +2502,7 @@ static int open_seed_devices(struct btrfs_fs_info *fs_info, u8 *fsid)
 
 	fs_devices = fs_info->fs_devices->seed;
 	while (fs_devices) {
-		if (!memcmp(fs_devices->fsid, fsid, BTRFS_UUID_SIZE)) {
+		if (memcmp(fs_devices->fsid, fsid, BTRFS_UUID_SIZE) == 0) {
 			ret = 0;
 			goto out;
 		}
diff --git a/kernel-shared/zoned.c b/kernel-shared/zoned.c
index f88f4fbd34..b2e14f1d59 100644
--- a/kernel-shared/zoned.c
+++ b/kernel-shared/zoned.c
@@ -364,13 +364,13 @@ static int report_zones(int fd, const char *file,
 
 	zinfo->zones = calloc(zinfo->nr_zones, sizeof(struct blk_zone));
 	if (!zinfo->zones) {
-		error_msg(ERROR_MSG_MEMORY, "zone information");
+		error_mem("zone information");
 		exit(1);
 	}
 
 	zinfo->active_zones = bitmap_zalloc(zinfo->nr_zones);
 	if (!zinfo->active_zones) {
-		error_msg(ERROR_MSG_MEMORY, "active zone bitmap");
+		error_mem("active zone bitmap");
 		exit(1);
 	}
 
@@ -387,7 +387,7 @@ static int report_zones(int fd, const char *file,
 		   sizeof(struct blk_zone) * BTRFS_REPORT_NR_ZONES;
 	rep = kmalloc(rep_size, GFP_KERNEL);
 	if (!rep) {
-		error_msg(ERROR_MSG_MEMORY, "zone report");
+		error_mem("zone report");
 		exit(1);
 	}
 
@@ -651,7 +651,7 @@ size_t btrfs_sb_io(int fd, void *buf, off_t offset, int rw)
 	rep_size = sizeof(struct blk_zone_report) + sizeof(struct blk_zone) * 2;
 	rep = calloc(1, rep_size);
 	if (!rep) {
-		error_msg(ERROR_MSG_MEMORY, "zone report");
+		error_mem("zone report");
 		exit(1);
 	}
 
@@ -1211,14 +1211,14 @@ int btrfs_load_block_group_zone_info(struct btrfs_fs_info *fs_info,
 
 	zone_info = calloc(map->num_stripes, sizeof(*zone_info));
 	if (!zone_info) {
-		error_msg(ERROR_MSG_MEMORY, "zone info");
+		error_mem("zone info");
 		return -ENOMEM;
 	}
 
 	active = bitmap_zalloc(map->num_stripes);
 	if (!active) {
 		free(zone_info);
-		error_msg(ERROR_MSG_MEMORY, "active bitmap");
+		error_mem("active bitmap");
 		return -ENOMEM;
 	}
 
@@ -1446,7 +1446,7 @@ int btrfs_get_zone_info(int fd, const char *file,
 #ifdef BTRFS_ZONED
 	zinfo = calloc(1, sizeof(*zinfo));
 	if (!zinfo) {
-		error_msg(ERROR_MSG_MEMORY, "zone information");
+		error_mem("zone information");
 		exit(1);
 	}
 
diff --git a/libbtrfsutil/python/setup.cfg b/libbtrfsutil/python/setup.cfg
new file mode 100644
index 0000000000..6224f31452
--- /dev/null
+++ b/libbtrfsutil/python/setup.cfg
@@ -0,0 +1,2 @@
+[pycodestyle]
+max-line-length = 120
diff --git a/libbtrfsutil/python/setup.py b/libbtrfsutil/python/setup.py
index 25a42e95f8..8b2db17f5a 100755
--- a/libbtrfsutil/python/setup.py
+++ b/libbtrfsutil/python/setup.py
@@ -23,7 +23,6 @@
 import sys
 from setuptools import setup, Extension
 from setuptools.command.build_ext import build_ext
-import subprocess
 
 
 def get_version():
diff --git a/libbtrfsutil/python/tests/.pylintrc b/libbtrfsutil/python/tests/.pylintrc
new file mode 100644
index 0000000000..32b2e620f8
--- /dev/null
+++ b/libbtrfsutil/python/tests/.pylintrc
@@ -0,0 +1,5 @@
+[MASTER]
+extension-pkg-allow-list=btrfsutil
+
+[FORMAT]
+max-line-length=120
diff --git a/libbtrfsutil/python/tests/__init__.py b/libbtrfsutil/python/tests/__init__.py
index a1ea740e53..149f4be232 100644
--- a/libbtrfsutil/python/tests/__init__.py
+++ b/libbtrfsutil/python/tests/__init__.py
@@ -65,7 +65,8 @@ def mount_btrfs(self):
         mountpoint = tempfile.mkdtemp()
         try:
             with tempfile.NamedTemporaryFile(delete=False) as f:
-                os.truncate(f.fileno(), 1024 * 1024 * 1024)
+                os.truncate(f.fileno(), 0)
+                os.truncate(f.fileno(), 4 * 1024 * 1024 * 1024)
                 image = f.name
         except Exception as e:
             os.rmdir(mountpoint)
@@ -76,7 +77,8 @@ def mount_btrfs(self):
         else:
             mkfs = 'mkfs.btrfs'
         try:
-            subprocess.check_call([mkfs, '-q', image])
+            verbosity = '-q'
+            subprocess.check_call([mkfs, verbosity, image])
             subprocess.check_call(
                 [
                     'mount',
diff --git a/libbtrfsutil/python/tests/test_filesystem.py b/libbtrfsutil/python/tests/test_filesystem.py
index f084261ab7..04b30c7648 100644
--- a/libbtrfsutil/python/tests/test_filesystem.py
+++ b/libbtrfsutil/python/tests/test_filesystem.py
@@ -19,7 +19,7 @@
 import time
 
 import btrfsutil
-from tests import BtrfsTestCase, HAVE_PATH_LIKE
+from tests import BtrfsTestCase
 
 
 def touch(path):
diff --git a/libbtrfsutil/python/tests/test_subvolume.py b/libbtrfsutil/python/tests/test_subvolume.py
index a2328258e2..d67af83249 100644
--- a/libbtrfsutil/python/tests/test_subvolume.py
+++ b/libbtrfsutil/python/tests/test_subvolume.py
@@ -15,7 +15,6 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with libbtrfsutil.  If not, see <http://www.gnu.org/licenses/>.
 
-import fcntl
 import errno
 import multiprocessing
 import os
diff --git a/libbtrfsutil/stubs.h b/libbtrfsutil/stubs.h
index e0023f7da7..a3519fcea8 100644
--- a/libbtrfsutil/stubs.h
+++ b/libbtrfsutil/stubs.h
@@ -16,6 +16,7 @@
  */
 
 #ifndef _LIBBTRFSUTIL_STUBS_H_
+#define _LIBBTRFSUTIL_STUBS_H_
 
 #include <stddef.h>
 
diff --git a/mkfs/main.c b/mkfs/main.c
index f5634efb69..3d5d8806ec 100644
--- a/mkfs/main.c
+++ b/mkfs/main.c
@@ -1189,7 +1189,7 @@ static int parse_subvolume(const char *path, struct list_head *subvols,
 
 	subvol = calloc(1, sizeof(struct rootdir_subvol));
 	if (!subvol) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return 1;
 	}
 
@@ -1244,13 +1244,13 @@ static int parse_inode_flags(const char *option, struct list_head *inode_flags_l
 	option_dup = strdup(option);
 	if (!option_dup) {
 		ret = -ENOMEM;
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		goto cleanup;
 	}
 	entry = calloc(1, sizeof(*entry));
 	if (!entry) {
 		ret = -ENOMEM;
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		goto cleanup;
 	}
 	colon = strstr(option_dup, ":");
@@ -2028,7 +2028,7 @@ int BOX_MAIN(mkfs)(int argc, char **argv)
 	prepare_ctx = calloc(device_count, sizeof(*prepare_ctx));
 
 	if (!t_prepare || !prepare_ctx) {
-		error_msg(ERROR_MSG_MEMORY, "thread for preparing devices");
+		error_mem("thread for preparing devices");
 		ret = 1;
 		goto error;
 	}
@@ -2394,9 +2394,14 @@ int BOX_MAIN(mkfs)(int argc, char **argv)
 			pretty_size(allocation.system));
 		printf("SSD detected:       %s\n", ssd ? "yes" : "no");
 		printf("Zoned device:       %s\n", opt_zoned ? "yes" : "no");
-		if (opt_zoned)
+		if (opt_zoned) {
 			printf("  Zone size:        %s\n",
 			       pretty_size(fs_info->zone_size));
+			if (zoned_model(file) == ZONED_NONE)
+				printf("  Mode:             emulated\n");
+			else
+				printf("  Mode:             host managed\n");
+		}
 		btrfs_parse_fs_features_to_string(features_buf, &features);
 		printf("Features:           %s\n", features_buf);
 		printf("Checksum:           %s\n",
diff --git a/mkfs/rootdir.c b/mkfs/rootdir.c
index 151403df52..7bdd6245f0 100644
--- a/mkfs/rootdir.c
+++ b/mkfs/rootdir.c
@@ -615,7 +615,7 @@ static ssize_t zstd_compress_extent(bool first_sector, u32 sectorsize,
 
 	zstd_ctx = ZSTD_createCCtx();
 	if (!zstd_ctx) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return -ENOMEM;
 	}
 
@@ -992,7 +992,7 @@ static ssize_t zlib_compress_inline_extent(char *buf, u64 size, char **comp_buf)
 
 	out = malloc(size);
 	if (!out) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -1050,7 +1050,7 @@ static ssize_t lzo_compress_inline_extent(void *buf, u64 size, char **comp_buf,
 
 	out = malloc(out_size);
 	if (!out) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -1098,7 +1098,7 @@ static ssize_t zstd_compress_inline_extent(char *buf, u64 size, char **comp_buf)
 
 	zstd_ctx = ZSTD_createCCtx();
 	if (!zstd_ctx) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		return -ENOMEM;
 	}
 
@@ -1121,7 +1121,7 @@ static ssize_t zstd_compress_inline_extent(char *buf, u64 size, char **comp_buf)
 
 	out = malloc(size);
 	if (!out) {
-		error_msg(ERROR_MSG_MEMORY, NULL);
+		error_mem(NULL);
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -1677,7 +1677,7 @@ static int ftw_add_inode(const char *full_path, const struct stat *st,
 		ret = rootdir_path_push(&current_path, root, btrfs_root_dirid(&root->root_item));
 		if (ret < 0) {
 			errno = -ret;
-			error_msg(ERROR_MSG_MEMORY, "push path for rootdir: %m");
+			error_mem("push path for rootdir: %m");
 			return ret;
 		}
 		return ret;
diff --git a/show-blocks b/show-blocks
index 3876b2acfa..eac107d579 100755
--- a/show-blocks
+++ b/show-blocks
@@ -16,7 +16,7 @@
 # Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 # Boston, MA 021110-1307, USA.
 #
-import sys, os, signal, time, commands, tempfile, random
+import sys, os, random
 
 # numpy seems to override random() with something else.  Instantiate our
 # own here
@@ -25,7 +25,6 @@ randgen.seed(50)
 
 from optparse import OptionParser
 from matplotlib import rcParams
-from matplotlib.font_manager import fontManager, FontProperties
 import numpy
 
 rcParams['numerix'] = 'numpy'
diff --git a/tests/cli-tests/003-fi-resize-args/test.sh b/tests/cli-tests/003-fi-resize-args/test.sh
index 66e09fa7fd..2f9d75b430 100755
--- a/tests/cli-tests/003-fi-resize-args/test.sh
+++ b/tests/cli-tests/003-fi-resize-args/test.sh
@@ -58,7 +58,7 @@ done
 run_mustfail_stdout "should fail for image" \
 	"$TOP/btrfs" filesystem resize 1:-128M "$TEST_DEV" |
 	_log_stdout |
-	grep -q "ERROR: resize works on mounted filesystems and accepts only" ||
+	grep -q "ERROR: to resize a file containing a BTRFS image use the --offline flag" ||
 	_fail "no expected error message in the output 2"
 
 run_check_umount_test_dev
diff --git a/tests/common b/tests/common
index 2c90acb90c..48cb88870e 100644
--- a/tests/common
+++ b/tests/common
@@ -413,7 +413,7 @@ check_prereq()
 {
 	# Internal tools for testing, not shipped with the package
 	case "$1" in
-	btrfs-corrupt-block|btrfs-find-root|btrfs-select-super|fssum)
+	btrfs-corrupt-block|btrfs-find-root|btrfs-select-super|fssum|btrfs-sb-mod)
 		if ! [ -f "$INTERNAL_BIN/$1" ]; then
 			_fail "Failed prerequisites: $INTERNAL_BIN/$1";
 		fi
diff --git a/tests/fsck-tests/057-seed-false-alerts/test.sh b/tests/fsck-tests/057-seed-false-alerts/test.sh
index edf160fab3..2d491e1fba 100755
--- a/tests/fsck-tests/057-seed-false-alerts/test.sh
+++ b/tests/fsck-tests/057-seed-false-alerts/test.sh
@@ -35,13 +35,13 @@ sprouted_output=$(_mktemp btrfs-progs-sprouted-check-stdout.XXXXXX)
 run_check_stdout $SUDO_HELPER "$TOP/btrfs" check "$dev1" >> "$seed_output"
 run_check_stdout $SUDO_HELPER "$TOP/btrfs" check "$dev2" >> "$sprouted_output"
 
-# There should be no warning for both seed and sprouted fs
-if grep -q "WARNING" "$seed_output"; then
+# There should be no warning about the device size for both seed and sprouted fs
+if grep -q "fix-device-size" "$seed_output"; then
 	cleanup_loopdevs
 	rm -f -- "$seed_output" "$sprouted_output"
 	_fail "false alerts detected for seed fs"
 fi
-if grep -q "WARNING" "$sprouted_output"; then
+if grep -q "fix-device-size" "$sprouted_output"; then
 	cleanup_loopdevs
 	rm -f -- "$seed_output" "$sprouted_output"
 	_fail "false alerts detected for sprouted fs"
diff --git a/tests/fsstress.c b/tests/fsstress.c
index c25320bbd8..44ce924ff6 100644
--- a/tests/fsstress.c
+++ b/tests/fsstress.c
@@ -2069,8 +2069,8 @@ symlink_path(const char *name1, pathname_t *name)
 	char		buf[NAME_MAX + 1];
 	pathname_t	newname;
 	int		rval;
-        
-        if (!strcmp(name1, name->path)) {
+
+        if (strcmp(name1, name->path) == 0) {
             printf("yikes! %s %s\n", name1, name->path);
             return 0;
         }
diff --git a/tests/fssum.c b/tests/fssum.c
index d3d2870a49..40e54192b1 100644
--- a/tests/fssum.c
+++ b/tests/fssum.c
@@ -426,8 +426,8 @@ static void
 check_match(char *fn, char *local_m, char *remote_m,
 	    char *local_c, char *remote_c)
 {
-	int match_m = !strcmp(local_m, remote_m);
-	int match_c = !strcmp(local_c, remote_c);
+	int match_m = (strcmp(local_m, remote_m) == 0);
+	int match_c = (strcmp(local_c, remote_c) == 0);
 
 	if (match_m && !match_c) {
 		printf("data mismatch in %s\n", fn);
@@ -540,7 +540,7 @@ sum(int dirfd, int level, sum_t *dircs, char *path_prefix, char *path_in)
 		exit(-1);
 	}
 	while((de = readdir(d))) {
-		if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, ".."))
+		if (strcmp(de->d_name, ".") == 0 || strcmp(de->d_name, "..") == 0)
 			continue;
 		if (entries == alloclen) {
 			void *tmp;
diff --git a/tests/fuzz-tests/010-simple-sb/test.sh b/tests/fuzz-tests/010-simple-sb/test.sh
new file mode 100755
index 0000000000..148bef5f14
--- /dev/null
+++ b/tests/fuzz-tests/010-simple-sb/test.sh
@@ -0,0 +1,76 @@
+#!/bin/bash
+# Change fields in super block and do test run of 'btrfs check'
+
+source "$TEST_TOP/common" || exit
+source "$TEST_TOP/common.convert" || exit
+
+check_prereq btrfs-sb-mod
+
+setup_root_helper
+prepare_test_dev
+
+run_check_mkfs_test_dev
+run_check_mount_test_dev
+#populate_fs
+generate_dataset "small"
+generate_dataset "sparse"
+run_check_umount_test_dev
+
+# See btrfs-sb-mod --help
+fields=(
+bytenr
+flags
+magic
+generation
+root
+chunk_root
+log_root
+total_bytes
+bytes_used
+root_dir_objectid
+num_devices
+sectorsize
+nodesize
+stripesize
+sys_chunk_array_size
+chunk_root_generation
+compat_flags
+compat_ro_flags
+incompat_flags
+csum_type
+root_level
+chunk_root_level
+log_root_level
+cache_generation
+uuid_tree_generation
+dev_item.devid
+dev_item.total_bytes
+dev_item.bytes_used
+dev_item.io_align
+dev_item.io_width
+dev_item.sector_size
+dev_item.type
+dev_item.generation
+dev_item.start_offset
+dev_item.dev_group
+dev_item.seek_speed
+dev_item.bandwidth)
+
+# Attempted changes:
+#
+# - off by one
+# - LSB bit flips
+# - 32bit boundary bit flips
+# - off by sector
+# - off by node
+# - endianness swap
+for field in "${fields[@]}"; do
+	for op in -1 +1 ^2 ^4 ^256 ^2147483648 ^4294967296 ^8589934592 +4096 -4096 +16384 -16384 @; do
+		run_check $SUDO_HELPER truncate -s 0 image.test
+		run_check $SUDO_HELPER cp --reflink=auto --sparse=auto "$TEST_DEV" image.test
+		run_check $SUDO_HELPER "$TOP/btrfs-sb-mod" image.test "$field" "$op"
+		run_mayfail $SUDO_HELPER "$TOP/btrfs" check image.test
+	done
+done
+
+run_check $SUDO_HELPER rm -f -- image.test
diff --git a/tests/misc-tests/070-offline-resize/test.sh b/tests/misc-tests/070-offline-resize/test.sh
new file mode 100755
index 0000000000..7788c4d84d
--- /dev/null
+++ b/tests/misc-tests/070-offline-resize/test.sh
@@ -0,0 +1,168 @@
+#!/bin/bash
+#
+# Test filesystem resize --offline functionality
+#
+# Tests various resize operations on offline:
+#
+# - Incremental resize (+1G, 1:+1G)
+# - Absolute resize (2G)
+# - Invalid operations (multi-device, invalid syntax, shrinking)
+
+source "$TEST_TOP/common" || exit
+
+check_prereq mkfs.btrfs
+check_prereq btrfs
+
+setup_root_helper
+
+get_filesystem_size()
+{
+	local mount="$1"
+
+	size=$(run_check_stdout $SUDO_HELPER "$TOP/btrfs" filesystem usage -m "$mount" | \
+		grep "Device size:" | awk '{print $3}' | sed 's/\..*//')
+	echo "$size"
+}
+
+create_backing_file()
+{
+	local path="$1"
+	local size_mb="$2"
+
+	run_check truncate -s "${size_mb}M" "$path"
+}
+
+# Test offline resize with incremental size (+1G)
+_log "Testing offline resize +1G"
+backing="$(_mktemp backing)"
+create_backing_file "$backing" 1024
+
+run_check "$TOP/mkfs.btrfs" -f "$backing"
+run_check "$TOP/btrfs" filesystem resize --offline "+1G" "$backing"
+
+TEST_DEV="$backing"
+run_check_mount_test_dev
+actual_size=$(get_filesystem_size "$TEST_MNT")
+if [ "$actual_size" != "2048" ]; then
+	_fail "Size mismatch: expected 2048MiB, got ${actual_size}MiB"
+fi
+run_check_umount_test_dev
+rm -f "$backing"
+
+# Test offline resize with device-specific incremental size (1:+1G)
+_log "Testing offline resize 1:+1G"
+backing="$(_mktemp backing)"
+create_backing_file "$backing" 1024
+
+run_check "$TOP/mkfs.btrfs" -f "$backing"
+run_check "$TOP/btrfs" filesystem resize --offline "1:+1G" "$backing"
+
+TEST_DEV="$backing"
+run_check_mount_test_dev
+actual_size=$(get_filesystem_size "$TEST_MNT")
+if [ "$actual_size" != "2048" ]; then
+	_fail "Size mismatch: expected 2048MiB, got ${actual_size}MiB"
+fi
+run_check_umount_test_dev
+rm -f "$backing"
+
+# Test offline resize with absolute size (2G)
+_log "Testing offline resize 2G"
+backing="$(_mktemp backing)"
+create_backing_file "$backing" 1024
+
+run_check "$TOP/mkfs.btrfs" -f "$backing"
+run_check "$TOP/btrfs" filesystem resize --offline "2G" "$backing"
+
+TEST_DEV="$backing"
+run_check_mount_test_dev
+actual_size=$(get_filesystem_size "$TEST_MNT")
+if [ "$actual_size" != "2048" ]; then
+	_fail "Size mismatch: expected 2048MiB, got ${actual_size}MiB"
+fi
+run_check_umount_test_dev
+rm -f "$backing"
+
+# Test offline resize with invalid device id (2:+1G)
+_log "Testing offline resize with invalid device id 2:+1G"
+backing="$(_mktemp backing)"
+create_backing_file "$backing" 1024
+
+run_check "$TOP/mkfs.btrfs" -f "$backing"
+run_mustfail "offline resize should fail with invalid device id" \
+	"$TOP/btrfs" filesystem resize --offline "2:+1G" "$backing"
+rm -f "$backing"
+
+# Test offline resize with shrinking (not supported)
+_log "Testing offline resize with shrinking -10M"
+backing="$(_mktemp backing)"
+create_backing_file "$backing" 1024
+
+run_check "$TOP/mkfs.btrfs" -f "$backing"
+run_mustfail "offline resize should not support shrinking" \
+	"$TOP/btrfs" filesystem resize --offline "-10M" "$backing"
+rm -f "$backing"
+
+# Test offline resize with cancel (not supported)
+_log "Testing offline resize with cancel"
+backing="$(_mktemp backing)"
+create_backing_file "$backing" 1024
+
+run_check "$TOP/mkfs.btrfs" -f "$backing"
+run_mustfail "offline resize should not support cancel" \
+	"$TOP/btrfs" filesystem resize --offline "cancel" "$backing"
+rm -f "$backing"
+
+# Test offline resize with invalid size format
+_log "Testing offline resize with invalid size format 1:+1a"
+backing="$(_mktemp backing)"
+create_backing_file "$backing" 1024
+
+run_check "$TOP/mkfs.btrfs" -f "$backing"
+run_mustfail "offline resize should fail with invalid size format" \
+	"$TOP/btrfs" filesystem resize --offline "1:+1a" "$backing"
+rm -f "$backing"
+
+# Test offline resize on multi-device filesystem (should fail)
+_log "Testing offline resize on multi-device filesystem"
+backing1="$(_mktemp backing1)"
+backing2="$(_mktemp backing2)"
+
+create_backing_file "$backing1" 1024
+create_backing_file "$backing2" 1024
+
+run_check "$TOP/mkfs.btrfs" -f "$backing1" "$backing2"
+run_mustfail "offline resize should fail on multi-device filesystem" \
+	"$TOP/btrfs" filesystem resize --offline "+1G" "$backing1"
+
+rm -f "$backing1" "$backing2"
+
+# Test that --offline and --enqueue are incompatible
+_log "Testing that --offline and --enqueue are incompatible"
+backing="$(_mktemp backing)"
+create_backing_file "$backing" 1024
+
+run_check "$TOP/mkfs.btrfs" -f "$backing"
+run_mustfail "--offline and --enqueue should be incompatible" \
+	"$TOP/btrfs" filesystem resize --offline --enqueue "+1G" "$backing"
+
+rm -f "$backing"
+
+# Test offline resize on mounted filesystem (should fail)
+_log "Testing offline resize on mounted filesystem"
+setup_loopdevs 1
+prepare_loopdevs
+
+dev="${loopdevs[1]}"
+run_check "$TOP/mkfs.btrfs" -f "$dev"
+
+TEST_DEV="$dev"
+run_check_mount_test_dev
+
+# Get the backing file path from the loop device
+backing=$(losetup -l "$dev" | tail -n1 | awk '{print $6}')
+run_mustfail "offline resize should fail on mounted filesystem" \
+	"$TOP/btrfs" filesystem resize --offline "+1G" "$backing"
+
+run_check_umount_test_dev
+cleanup_loopdevs
diff --git a/tune/change-uuid.c b/tune/change-uuid.c
index 810e85e1af..f62ee7db74 100644
--- a/tune/change-uuid.c
+++ b/tune/change-uuid.c
@@ -300,9 +300,9 @@ int change_uuid(struct btrfs_fs_info *fs_info, const char *new_fsid_str)
 	/* Now fsid change is done */
 	pr_verbose(LOG_DEFAULT, "Clear superblock flag CHANGING_FSID\n");
 	ret = change_fsid_done(fs_info);
-	fs_info->new_chunk_tree_uuid = NULL;
 	pr_verbose(LOG_DEFAULT, "Fsid change finished\n");
 out:
+	fs_info->new_chunk_tree_uuid = NULL;
 	return ret;
 }