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| author |   Jaegeuk Kim <jaegeuk@kernel.org> | 2019-09-03 10:06:26 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2019-09-06 16:18:27 -0700 |
| commit | cfb9a34d147b8d002d4330ddb53a3eb79565d17c (patch) | |
| tree | 0fbaf1e2ee15430ea126ab6bd8db3f13629f2267 /fs/f2fs | |
| parent | f2fs: fix error path of f2fs_convert_inline_page() (diff) | |
| download | wireguard-linux-cfb9a34d147b8d002d4330ddb53a3eb79565d17c.tar.xz wireguard-linux-cfb9a34d147b8d002d4330ddb53a3eb79565d17c.zip | |
f2fs: convert inline_data in prior to i_size_write
In below call path, we change i_size before inline conversion, however,
if we failed to convert inline inode, the inode may have wrong i_size
which is larger than max inline size, result inline inode corruption.
- f2fs_setattr
- truncate_setsize
- f2fs_convert_inline_inode
This patch reorders truncate_setsize() and f2fs_convert_inline_inode()
to guarantee inline_data has valid i_size.
Fixes: 0cab80ee0c9e ("f2fs: fix to convert inline inode in ->setattr")
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/file.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 6528216ab832..10927a0b8df3 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -814,14 +814,24 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr) } if (attr->ia_valid & ATTR_SIZE) { - bool to_smaller = (attr->ia_size <= i_size_read(inode)); + loff_t old_size = i_size_read(inode); + + if (attr->ia_size > MAX_INLINE_DATA(inode)) { + /* + * should convert inline inode before i_size_write to + * keep smaller than inline_data size with inline flag. + */ + err = f2fs_convert_inline_inode(inode); + if (err) + return err; + } down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); down_write(&F2FS_I(inode)->i_mmap_sem); truncate_setsize(inode, attr->ia_size); - if (to_smaller) + if (attr->ia_size <= old_size) err = f2fs_truncate(inode); /* * do not trim all blocks after i_size if target size is @@ -829,21 +839,11 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr) */ up_write(&F2FS_I(inode)->i_mmap_sem); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); - if (err) return err; - if (!to_smaller) { - /* should convert inline inode here */ - if (!f2fs_may_inline_data(inode)) { - err = f2fs_convert_inline_inode(inode); - if (err) - return err; - } - inode->i_mtime = inode->i_ctime = current_time(inode); - } - down_write(&F2FS_I(inode)->i_sem); + inode->i_mtime = inode->i_ctime = current_time(inode); F2FS_I(inode)->last_disk_size = i_size_read(inode); up_write(&F2FS_I(inode)->i_sem); } |