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| author | Theodore Ts'o <tytso@mit.edu> | 2019-11-21 19:09:43 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2019-12-26 17:28:31 +0100 |
| commit | 46f870d690fecc792a66730dcbbf0aa109f5f9ab (patch) | |
| tree | 0e517f47ca1c5073481e0d8bfc8631f24388dbca /fs/ext4/namei.c | |
| parent | ext4: save the error code which triggered an ext4_error() in the superblock (diff) | |
| download | linux-46f870d690fecc792a66730dcbbf0aa109f5f9ab.tar.xz linux-46f870d690fecc792a66730dcbbf0aa109f5f9ab.zip | |
ext4: simulate various I/O and checksum errors when reading metadata
This allows us to test various error handling code paths
Link: https://lore.kernel.org/r/20191209012317.59398-1-tytso@mit.edu
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/namei.c')
| -rw-r--r-- | fs/ext4/namei.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 1bb6099397af..d4c0d7a18d64 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -109,7 +109,10 @@ static struct buffer_head *__ext4_read_dirblock(struct inode *inode, struct ext4_dir_entry *dirent; int is_dx_block = 0; - bh = ext4_bread(NULL, inode, block, 0); + if (ext4_simulate_fail(inode->i_sb, EXT4_SIM_DIRBLOCK_EIO)) + bh = ERR_PTR(-EIO); + else + bh = ext4_bread(NULL, inode, block, 0); if (IS_ERR(bh)) { __ext4_warning(inode->i_sb, func, line, "inode #%lu: lblock %lu: comm %s: " @@ -153,7 +156,8 @@ static struct buffer_head *__ext4_read_dirblock(struct inode *inode, * caller is sure it should be an index block. */ if (is_dx_block && type == INDEX) { - if (ext4_dx_csum_verify(inode, dirent)) + if (ext4_dx_csum_verify(inode, dirent) && + !ext4_simulate_fail(inode->i_sb, EXT4_SIM_DIRBLOCK_CRC)) set_buffer_verified(bh); else { ext4_set_errno(inode->i_sb, EFSBADCRC); @@ -164,7 +168,8 @@ static struct buffer_head *__ext4_read_dirblock(struct inode *inode, } } if (!is_dx_block) { - if (ext4_dirblock_csum_verify(inode, bh)) + if (ext4_dirblock_csum_verify(inode, bh) && + !ext4_simulate_fail(inode->i_sb, EXT4_SIM_DIRBLOCK_CRC)) set_buffer_verified(bh); else { ext4_set_errno(inode->i_sb, EFSBADCRC); |