From: Dave Chinner <dchinner@xxxxxxxxxx>
Currently the attribute code will not detect and correct errors in
the attribute tree. It also fails to validate the CRCs and headers
on remote attribute blocks. Ensure that all the attribute blocks are
CRC checked and that the processing functions understand the correct
block formats for decoding.
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
---
repair/attr_repair.c | 35 ++++++++++++++++++++++++++++-------
1 file changed, 28 insertions(+), 7 deletions(-)
diff --git a/repair/attr_repair.c b/repair/attr_repair.c
index ba85ac2..13ec90e 100644
--- a/repair/attr_repair.c
+++ b/repair/attr_repair.c
@@ -611,6 +611,8 @@ verify_da_path(xfs_mount_t *mp,
ASSERT(cursor->level[this_level].dirty == 0 ||
(cursor->level[this_level].dirty && !no_modify));
+ if (bp->b_error == EFSBADCRC)
+ cursor->level[this_level].dirty++;
if (cursor->level[this_level].dirty && !no_modify)
libxfs_writebuf(cursor->level[this_level].bp, 0);
else
@@ -974,6 +976,10 @@ rmtval_get(xfs_mount_t *mp, xfs_ino_t ino, blkmap_t
*blkmap,
xfs_dfsbno_t bno;
xfs_buf_t *bp;
int clearit = 0, i = 0, length = 0, amountdone = 0;
+ int hdrsize = 0;
+
+ if (xfs_sb_version_hascrc(&mp->m_sb))
+ hdrsize = sizeof(struct xfs_attr3_rmt_hdr);
/* ASSUMPTION: valuelen is a valid number, so use it for looping */
/* Note that valuelen is not a multiple of blocksize */
@@ -986,16 +992,26 @@ rmtval_get(xfs_mount_t *mp, xfs_ino_t ino, blkmap_t
*blkmap,
break;
}
bp = libxfs_readbuf(mp->m_dev, XFS_FSB_TO_DADDR(mp, bno),
- XFS_FSB_TO_BB(mp, 1), 0, NULL);
+ XFS_FSB_TO_BB(mp, 1), 0,
+ &xfs_attr3_rmt_buf_ops);
if (!bp) {
do_warn(
_("can't read remote block for attributes of inode %" PRIu64 "\n"),
ino);
clearit = 1;
break;
}
+
+ if (bp->b_error == EFSBADCRC || bp->b_error == EFSCORRUPTED) {
+ do_warn(
+ _("Corrupt remote block for attributes of inode %" PRIu64 "\n"), ino);
+ clearit = 1;
+ break;
+ }
+
ASSERT(mp->m_sb.sb_blocksize == XFS_BUF_COUNT(bp));
- length = MIN(XFS_BUF_COUNT(bp), valuelen - amountdone);
- memmove(value, XFS_BUF_PTR(bp), length);
+
+ length = MIN(XFS_BUF_COUNT(bp) - hdrsize, valuelen -
amountdone);
+ memmove(value, XFS_BUF_PTR(bp) + hdrsize, length);
amountdone += length;
value += length;
i++;
@@ -1320,13 +1336,16 @@ process_leaf_attr_level(xfs_mount_t *mp,
}
bp = libxfs_readbuf(mp->m_dev, XFS_FSB_TO_DADDR(mp, dev_bno),
- XFS_FSB_TO_BB(mp, 1), 0, NULL);
+ XFS_FSB_TO_BB(mp, 1), 0,
+ &xfs_attr3_leaf_buf_ops);
if (!bp) {
do_warn(
_("can't read file block %u (fsbno %" PRIu64 ") for attribute fork of
inode %" PRIu64 "\n"),
da_bno, dev_bno, ino);
goto error_out;
}
+ if (bp->b_error == EFSBADCRC)
+ repair++;
leaf = bp->b_addr;
xfs_attr3_leaf_hdr_from_disk(&leafhdr, leaf);
@@ -1382,9 +1401,9 @@ process_leaf_attr_level(xfs_mount_t *mp,
current_hashval = greatest_hashval;
- if (repair && !no_modify)
+ if (repair && !no_modify)
libxfs_writebuf(bp, 0);
- else
+ else
libxfs_putbuf(bp);
} while (da_bno != 0);
@@ -1512,6 +1531,8 @@ process_longform_attr(
ino);
return(1);
}
+ if (bp->b_error == EFSBADCRC)
+ (*repair)++;
/* verify leaf block */
leaf = (xfs_attr_leafblock_t *)XFS_BUF_PTR(bp);
@@ -1555,7 +1576,7 @@ process_longform_attr(
case XFS_DA_NODE_MAGIC: /* btree-form attribute */
case XFS_DA3_NODE_MAGIC:
/* must do this now, to release block 0 before the traversal */
- if (repairlinks) {
+ if (*repair || repairlinks) {
*repair = 1;
libxfs_writebuf(bp, 0);
} else
--
1.9.0
|