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ext3: avoid printk floods in the face of directory corruption 

A very large directory with many read failures (either due to storage
problems, or due to invalid size & blocks from corruption) will generate a
printk storm as the filesystem continues to try to read all the blocks.
This flood of messages can tie up the box until it is complete - which may
be a very long time, especially for very large corrupted values.

This is fixed by only reporting the corruption once each time we try to
read the directory.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Eugene Teo <eugeneteo@kernel.sg>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Eric Sandeen 2008-10-18 20:28:00 -07:00 committed by Linus Torvalds
parent 5ec8b75e3a
commit cdbf6dba28
1 changed files with 7 additions and 3 deletions
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10
fs/ext3/dir.c
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@ -102,6 +102,7 @@ static int ext3_readdir(struct file * filp,
int err;
struct inode *inode = filp->f_path.dentry->d_inode;
int ret = 0;
int dir_has_error = 0;
sb = inode->i_sb;
@ -148,9 +149,12 @@ static int ext3_readdir(struct file * filp,
* of recovering data when there's a bad sector
*/
if (!bh) {
ext3_error (sb, "ext3_readdir",
"directory #%lu contains a hole at offset %lu",
inode->i_ino, (unsigned long)filp->f_pos);
if (!dir_has_error) {
ext3_error(sb, __func__, "directory #%lu "
"contains a hole at offset %lld",
inode->i_ino, filp->f_pos);
dir_has_error = 1;
}
/* corrupt size? Maybe no more blocks to read */
if (filp->f_pos > inode->i_blocks << 9)
break;