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ext4: save the error code which triggered an ext4_error() in the superblock

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This allows the cause of an ext4_error() report to be categorized
based on whether it was triggered due to an I/O error, or an memory
allocation error, or other possible causes.  Most errors are caused by
a detected file system inconsistency, so the default code stored in
the superblock will be EXT4_ERR_EFSCORRUPTED.

Link: https://lore.kernel.org/r/20191204032335.7683-1-tytso@mit.edu
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o
2019-11-19 21:54:15 -05:00
parent a562c687d1
commit 878520ac45
12 changed files with 128 additions and 5 deletions
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3
fs/ext4/ext4_jbd2.c
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@@ -58,6 +58,7 @@ static int ext4_journal_check_start(struct super_block *sb)
* take the FS itself readonly cleanly.
*/
if (journal && is_journal_aborted(journal)) {
ext4_set_errno(sb, -journal->j_errno);
ext4_abort(sb, "Detected aborted journal");
return -EROFS;
}
@@ -249,6 +250,7 @@ int __ext4_forget(const char *where, unsigned int line, handle_t *handle,
if (err) {
ext4_journal_abort_handle(where, line, __func__,
bh, handle, err);
ext4_set_errno(inode->i_sb, -err);
__ext4_abort(inode->i_sb, where, line,
"error %d when attempting revoke", err);
}
@@ -320,6 +322,7 @@ int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
es = EXT4_SB(inode->i_sb)->s_es;
es->s_last_error_block =
cpu_to_le64(bh->b_blocknr);
ext4_set_errno(inode->i_sb, EIO);
ext4_error_inode(inode, where, line,
bh->b_blocknr,
"IO error syncing itable block");