f2fs: introduce F2FS_IOC_START_ATOMIC_REPLACE

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introduce a new ioctl to replace the whole content of a file atomically,
which means it induces truncate and content update at the same time.
We can start it with F2FS_IOC_START_ATOMIC_REPLACE and complete it with
F2FS_IOC_COMMIT_ATOMIC_WRITE. Or abort it with
F2FS_IOC_ABORT_ATOMIC_WRITE.

Signed-off-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

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Daeho Jeong 2022-11-11 09:04:06 -08:00 • committed by Jaegeuk Kim

parent 967eaad1fe

commit 41e8f85a75

5 changed files with 32 additions and 7 deletions

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3

fs/f2fs/data.c

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1

fs/f2fs/f2fs.h

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21

fs/f2fs/file.c

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13

fs/f2fs/segment.c

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1

include/uapi/linux/f2fs.h

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