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| author | Daeho Jeong <daehojeong@google.com> | 2022-11-11 09:04:06 -0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2022-11-28 12:46:23 -0800 |
| commit | 41e8f85a75fc60e1543e4903428a1b481b672a17 (patch) | |
| tree | 73ce84c5a51dc782dafce31c222c0eed27cba7be /fs/f2fs/data.c | |
| parent | 967eaad1fed5f6335ea97a47d45214744dc57925 (diff) | |
| download | linux-41e8f85a75fc60e1543e4903428a1b481b672a17.tar.bz2 | |
f2fs: introduce F2FS_IOC_START_ATOMIC_REPLACE
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>
Diffstat (limited to 'fs/f2fs/data.c')
| -rw-r--r-- | fs/f2fs/data.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 9b47ded653d1..560fa80590e9 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -3466,6 +3466,9 @@ static int prepare_atomic_write_begin(struct f2fs_sb_info *sbi, else if (*blk_addr != NULL_ADDR) return 0; + if (is_inode_flag_set(inode, FI_ATOMIC_REPLACE)) + goto reserve_block; + /* Look for the block in the original inode */ err = __find_data_block(inode, index, &ori_blk_addr); if (err) |