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Support for mmap() writable mappings. #175

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Merged
zabbo merged 14 commits into from
Feb 20, 2025
Merged

Support for mmap() writable mappings. #175

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b7a3d03
Add support for read only mmap()
bcrl Jul 27, 2020
3788d67
Add support for writable shared mmap()ings
bcrl Jul 27, 2020
311bf75
Add mmap tests.
aversecat Jun 10, 2024
92f704d
Enable all xfstests mmap() tests.
aversecat Jul 22, 2024
519b47a
mmap() trace events.
aversecat Aug 5, 2024
b944f60
remap_pages ops becomes obsolete.
aversecat May 31, 2024
1bcd1d4
Drop readdir pre-.iterate() compat (el7.5ish).
aversecat Jul 12, 2024
e59a5f8
Readdir w/offset validation.
aversecat Jan 21, 2025
cad12d5
Avoid deadlock in _readdir() due to copy_to_user().
aversecat Jul 16, 2024
8cb0850
Do not copy to user while holding locks in scoutfs_data_fiemap()
aversecat Aug 2, 2024
e76a171
Avoid faulting while cluster locked in _walk_inodes.
aversecat Aug 20, 2024
8b76a53
Avoid cluster locking while put_user() in _allocated_inos.
aversecat Aug 21, 2024
6c85879
Assert unlock doesn't underflow lock user count.
aversecat Sep 9, 2024
e9d1472
Fix ctx->pos updating to properly handle dent gaps
aversecat Jan 27, 2025
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43 changes: 23 additions & 20 deletions kmod/src/Makefile.kernelcompat
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Original file line number Diff line number Diff line change
Expand Up @@ -6,26 +6,6 @@

ccflags-y += -include $(src)/kernelcompat.h

#
# v3.10-rc6-21-gbb6f619b3a49
#
# _readdir changes from fop->readdir() to fop->iterate() and from
# filldir(dirent) to dir_emit(ctx).
#
ifneq (,$(shell grep 'iterate.*dir_context' include/linux/fs.h))
ccflags-y += -DKC_ITERATE_DIR_CONTEXT
endif

#
# v3.10-rc6-23-g5f99f4e79abc
#
# Helpers including dir_emit_dots() are added in the process of
# switching dcache_readdir() from fop->readdir() to fop->iterate()
#
ifneq (,$(shell grep 'dir_emit_dots' include/linux/fs.h))
ccflags-y += -DKC_DIR_EMIT_DOTS
endif

#
# v3.18-rc2-19-gb5ae6b15bd73
#
Expand Down Expand Up @@ -431,3 +411,26 @@ endif
ifneq (,$(shell grep 'struct file.*bdev_file_open_by_path.const char.*path' include/linux/blkdev.h))
ccflags-y += -DKC_BDEV_FILE_OPEN_BY_PATH
endif

# v4.0-rc7-1796-gfe0f07d08ee3
#
# direct-io changes modify inode_dio_done to now be called inode_dio_end
ifneq (,$(shell grep 'void inode_dio_end.struct inode' include/linux/fs.h))
ccflags-y += -DKC_INODE_DIO_END
endif

#
# v5.0-6476-g3d3539018d2c
#
# page fault handlers return a bitmask vm_fault_t instead
# Note: el8's header has a slightly modified prefix here
ifneq (,$(shell grep 'typedef.*__bitwise unsigned.*int vm_fault_t' include/linux/mm_types.h))
ccflags-y += -DKC_MM_VM_FAULT_T
endif

# v3.19-499-gd83a08db5ba6
#
# .remap pages becomes obsolete
ifneq (,$(shell grep 'int ..remap_pages..struct vm_area_struct' include/linux/mm.h))
ccflags-y += -DKC_MM_REMAP_PAGES
endif
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