From: Daeho Jeong daehojeong@google.com
[ Upstream commit 4d8d45df2252980f800c1b2fde941a103a18a70e ]
We need to make sure i_size doesn't change until atomic write commit is successful and restore it when commit is failed.
Signed-off-by: Daeho Jeong daehojeong@google.com Reviewed-by: Chao Yu chao@kernel.org Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Stable-dep-of: 0e8d040bfa4c ("f2fs: clear atomic_write_task in f2fs_abort_atomic_write()") Signed-off-by: Sasha Levin sashal@kernel.org --- fs/f2fs/f2fs.h | 8 ++++++++ fs/f2fs/file.c | 18 +++++++++++------- fs/f2fs/inode.c | 5 ++++- fs/f2fs/segment.c | 14 ++++++++++---- 4 files changed, 33 insertions(+), 12 deletions(-)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 8b9f0b3c77232..87664c309b3c8 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -764,6 +764,7 @@ enum { FI_COMPRESS_RELEASED, /* compressed blocks were released */ FI_ALIGNED_WRITE, /* enable aligned write */ FI_COW_FILE, /* indicate COW file */ + FI_ATOMIC_COMMITTED, /* indicate atomic commit completed except disk sync */ FI_MAX, /* max flag, never be used */ };
@@ -822,6 +823,7 @@ struct f2fs_inode_info { unsigned int i_cluster_size; /* cluster size */
unsigned int atomic_write_cnt; + loff_t original_i_size; /* original i_size before atomic write */ };
static inline void get_extent_info(struct extent_info *ext, @@ -3072,6 +3074,8 @@ static inline void f2fs_i_blocks_write(struct inode *inode, set_inode_flag(inode, FI_AUTO_RECOVER); }
+static inline bool f2fs_is_atomic_file(struct inode *inode); + static inline void f2fs_i_size_write(struct inode *inode, loff_t i_size) { bool clean = !is_inode_flag_set(inode, FI_DIRTY_INODE); @@ -3081,6 +3085,10 @@ static inline void f2fs_i_size_write(struct inode *inode, loff_t i_size) return;
i_size_write(inode, i_size); + + if (f2fs_is_atomic_file(inode)) + return; + f2fs_mark_inode_dirty_sync(inode, true); if (clean || recover) set_inode_flag(inode, FI_AUTO_RECOVER); diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index a03c61bd70165..7bb0c05e943cf 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -2041,6 +2041,7 @@ static int f2fs_ioc_start_atomic_write(struct file *filp) struct f2fs_inode_info *fi = F2FS_I(inode); struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct inode *pinode; + loff_t isize; int ret;
if (!inode_owner_or_capable(mnt_userns, inode)) @@ -2099,7 +2100,12 @@ static int f2fs_ioc_start_atomic_write(struct file *filp) f2fs_up_write(&fi->i_gc_rwsem[WRITE]); goto out; } - f2fs_i_size_write(fi->cow_inode, i_size_read(inode)); + + f2fs_write_inode(inode, NULL); + + isize = i_size_read(inode); + fi->original_i_size = isize; + f2fs_i_size_write(fi->cow_inode, isize);
stat_inc_atomic_inode(inode);
@@ -2137,16 +2143,14 @@ static int f2fs_ioc_commit_atomic_write(struct file *filp)
if (f2fs_is_atomic_file(inode)) { ret = f2fs_commit_atomic_write(inode); - if (ret) - goto unlock_out; - - ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true); if (!ret) - f2fs_abort_atomic_write(inode, false); + ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true); + + f2fs_abort_atomic_write(inode, ret); } else { ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 1, false); } -unlock_out: + inode_unlock(inode); mnt_drop_write_file(filp); return ret; diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index 5d6fd824f74f2..e8413b080e0a7 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -621,9 +621,12 @@ void f2fs_update_inode(struct inode *inode, struct page *node_page) ri->i_uid = cpu_to_le32(i_uid_read(inode)); ri->i_gid = cpu_to_le32(i_gid_read(inode)); ri->i_links = cpu_to_le32(inode->i_nlink); - ri->i_size = cpu_to_le64(i_size_read(inode)); ri->i_blocks = cpu_to_le64(SECTOR_TO_BLOCK(inode->i_blocks) + 1);
+ if (!f2fs_is_atomic_file(inode) || + is_inode_flag_set(inode, FI_ATOMIC_COMMITTED)) + ri->i_size = cpu_to_le64(i_size_read(inode)); + if (et) { read_lock(&et->lock); set_raw_extent(&et->largest, &ri->i_ext); diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index af9a3b7996b4d..60d79e427f988 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -192,14 +192,18 @@ void f2fs_abort_atomic_write(struct inode *inode, bool clean) if (!f2fs_is_atomic_file(inode)) return;
- if (clean) - truncate_inode_pages_final(inode->i_mapping); clear_inode_flag(fi->cow_inode, FI_COW_FILE); iput(fi->cow_inode); fi->cow_inode = NULL; release_atomic_write_cnt(inode); + clear_inode_flag(inode, FI_ATOMIC_COMMITTED); clear_inode_flag(inode, FI_ATOMIC_FILE); stat_dec_atomic_inode(inode); + + if (clean) { + truncate_inode_pages_final(inode->i_mapping); + f2fs_i_size_write(inode, fi->original_i_size); + } }
static int __replace_atomic_write_block(struct inode *inode, pgoff_t index, @@ -338,10 +342,12 @@ static int __f2fs_commit_atomic_write(struct inode *inode) }
out: - if (ret) + if (ret) { sbi->revoked_atomic_block += fi->atomic_write_cnt; - else + } else { sbi->committed_atomic_block += fi->atomic_write_cnt; + set_inode_flag(inode, FI_ATOMIC_COMMITTED); + }
__complete_revoke_list(inode, &revoke_list, ret ? true : false);