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nilfs2: treat missing cpfile header block as metadata corruption

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The cpfile, a metadata file that holds metadata for checkpoint management,
also has statistical information in its first block, and if reading this
block fails, it receives the internal code -ENOENT and returns that code
to the callers.

As with sufile, to prevent this -ENOENT from being propagated to system
calls, return -EIO instead when reading the header block fails.

Link: https://lkml.kernel.org/r/20240821154627.11848-3-konishi.ryusuke@gmail.com
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Ryusuke Konishi 2024-08-22 00:46:24 +09:00 committed by Andrew Morton
parent 62e6e78417
commit d07d8ba4ce
1 changed files with 12 additions and 10 deletions
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22
fs/nilfs2/cpfile.c
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@ -125,10 +125,17 @@ static void nilfs_cpfile_block_init(struct inode *cpfile,
}
}
static inline int nilfs_cpfile_get_header_block(struct inode *cpfile,
struct buffer_head **bhp)
static int nilfs_cpfile_get_header_block(struct inode *cpfile,
struct buffer_head **bhp)
{
return nilfs_mdt_get_block(cpfile, 0, 0, NULL, bhp);
int err = nilfs_mdt_get_block(cpfile, 0, 0, NULL, bhp);
if (unlikely(err == -ENOENT)) {
nilfs_error(cpfile->i_sb,
"missing header block in checkpoint metadata");
err = -EIO;
}
return err;
}
static inline int nilfs_cpfile_get_checkpoint_block(struct inode *cpfile,
@ -283,14 +290,9 @@ int nilfs_cpfile_create_checkpoint(struct inode *cpfile, __u64 cno)
down_write(&NILFS_MDT(cpfile)->mi_sem);
ret = nilfs_cpfile_get_header_block(cpfile, &header_bh);
if (unlikely(ret < 0)) {
if (ret == -ENOENT) {
nilfs_error(cpfile->i_sb,
"checkpoint creation failed due to metadata corruption.");
ret = -EIO;
}
if (unlikely(ret < 0))
goto out_sem;
}
ret = nilfs_cpfile_get_checkpoint_block(cpfile, cno, 1, &cp_bh);
if (unlikely(ret < 0))
goto out_header;