diff options
| 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/segment.c | |
| parent | 967eaad1fed5f6335ea97a47d45214744dc57925 (diff) | |
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/segment.c')
| -rw-r--r-- | fs/f2fs/segment.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 8aa81238c770..5ac026a57228 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -197,6 +197,7 @@ void f2fs_abort_atomic_write(struct inode *inode, bool clean) fi->cow_inode = NULL; release_atomic_write_cnt(inode); clear_inode_flag(inode, FI_ATOMIC_COMMITTED); + clear_inode_flag(inode, FI_ATOMIC_REPLACE); clear_inode_flag(inode, FI_ATOMIC_FILE); stat_dec_atomic_inode(inode); @@ -261,14 +262,24 @@ static void __complete_revoke_list(struct inode *inode, struct list_head *head, bool revoke) { struct revoke_entry *cur, *tmp; + pgoff_t start_index = 0; + bool truncate = is_inode_flag_set(inode, FI_ATOMIC_REPLACE); list_for_each_entry_safe(cur, tmp, head, list) { - if (revoke) + if (revoke) { __replace_atomic_write_block(inode, cur->index, cur->old_addr, NULL, true); + } else if (truncate) { + f2fs_truncate_hole(inode, start_index, cur->index); + start_index = cur->index + 1; + } + list_del(&cur->list); kmem_cache_free(revoke_entry_slab, cur); } + + if (!revoke && truncate) + f2fs_do_truncate_blocks(inode, start_index * PAGE_SIZE, false); } static int __f2fs_commit_atomic_write(struct inode *inode) |