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path: root/fs/xfs/libxfs/xfs_alloc.c
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Diffstat (limited to 'fs/xfs/libxfs/xfs_alloc.c')
-rw-r--r--fs/xfs/libxfs/xfs_alloc.c124
1 files changed, 79 insertions, 45 deletions
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index 83ed7715f856..c02781a4c091 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -167,7 +167,7 @@ xfs_alloc_lookup_ge(
* Lookup the first record less than or equal to [bno, len]
* in the btree given by cur.
*/
-static int /* error */
+int /* error */
xfs_alloc_lookup_le(
struct xfs_btree_cur *cur, /* btree cursor */
xfs_agblock_t bno, /* starting block of extent */
@@ -520,7 +520,7 @@ xfs_alloc_fixup_trees(
return 0;
}
-static bool
+static xfs_failaddr_t
xfs_agfl_verify(
struct xfs_buf *bp)
{
@@ -528,10 +528,19 @@ xfs_agfl_verify(
struct xfs_agfl *agfl = XFS_BUF_TO_AGFL(bp);
int i;
+ /*
+ * There is no verification of non-crc AGFLs because mkfs does not
+ * initialise the AGFL to zero or NULL. Hence the only valid part of the
+ * AGFL is what the AGF says is active. We can't get to the AGF, so we
+ * can't verify just those entries are valid.
+ */
+ if (!xfs_sb_version_hascrc(&mp->m_sb))
+ return NULL;
+
if (!uuid_equal(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid))
- return false;
+ return __this_address;
if (be32_to_cpu(agfl->agfl_magicnum) != XFS_AGFL_MAGIC)
- return false;
+ return __this_address;
/*
* during growfs operations, the perag is not fully initialised,
* so we can't use it for any useful checking. growfs ensures we can't
@@ -539,16 +548,17 @@ xfs_agfl_verify(
* so we can detect and avoid this problem.
*/
if (bp->b_pag && be32_to_cpu(agfl->agfl_seqno) != bp->b_pag->pag_agno)
- return false;
+ return __this_address;
for (i = 0; i < XFS_AGFL_SIZE(mp); i++) {
if (be32_to_cpu(agfl->agfl_bno[i]) != NULLAGBLOCK &&
be32_to_cpu(agfl->agfl_bno[i]) >= mp->m_sb.sb_agblocks)
- return false;
+ return __this_address;
}
- return xfs_log_check_lsn(mp,
- be64_to_cpu(XFS_BUF_TO_AGFL(bp)->agfl_lsn));
+ if (!xfs_log_check_lsn(mp, be64_to_cpu(XFS_BUF_TO_AGFL(bp)->agfl_lsn)))
+ return __this_address;
+ return NULL;
}
static void
@@ -556,6 +566,7 @@ xfs_agfl_read_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_target->bt_mount;
+ xfs_failaddr_t fa;
/*
* There is no verification of non-crc AGFLs because mkfs does not
@@ -567,28 +578,29 @@ xfs_agfl_read_verify(
return;
if (!xfs_buf_verify_cksum(bp, XFS_AGFL_CRC_OFF))
- xfs_buf_ioerror(bp, -EFSBADCRC);
- else if (!xfs_agfl_verify(bp))
- xfs_buf_ioerror(bp, -EFSCORRUPTED);
-
- if (bp->b_error)
- xfs_verifier_error(bp);
+ xfs_verifier_error(bp, -EFSBADCRC, __this_address);
+ else {
+ fa = xfs_agfl_verify(bp);
+ if (fa)
+ xfs_verifier_error(bp, -EFSCORRUPTED, fa);
+ }
}
static void
xfs_agfl_write_verify(
struct xfs_buf *bp)
{
- struct xfs_mount *mp = bp->b_target->bt_mount;
- struct xfs_buf_log_item *bip = bp->b_fspriv;
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_buf_log_item *bip = bp->b_log_item;
+ xfs_failaddr_t fa;
/* no verification of non-crc AGFLs */
if (!xfs_sb_version_hascrc(&mp->m_sb))
return;
- if (!xfs_agfl_verify(bp)) {
- xfs_buf_ioerror(bp, -EFSCORRUPTED);
- xfs_verifier_error(bp);
+ fa = xfs_agfl_verify(bp);
+ if (fa) {
+ xfs_verifier_error(bp, -EFSCORRUPTED, fa);
return;
}
@@ -602,6 +614,7 @@ const struct xfs_buf_ops xfs_agfl_buf_ops = {
.name = "xfs_agfl",
.verify_read = xfs_agfl_read_verify,
.verify_write = xfs_agfl_write_verify,
+ .verify_struct = xfs_agfl_verify,
};
/*
@@ -2397,19 +2410,19 @@ xfs_alloc_put_freelist(
return 0;
}
-static bool
+static xfs_failaddr_t
xfs_agf_verify(
- struct xfs_mount *mp,
- struct xfs_buf *bp)
- {
- struct xfs_agf *agf = XFS_BUF_TO_AGF(bp);
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_agf *agf = XFS_BUF_TO_AGF(bp);
if (xfs_sb_version_hascrc(&mp->m_sb)) {
if (!uuid_equal(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid))
- return false;
+ return __this_address;
if (!xfs_log_check_lsn(mp,
be64_to_cpu(XFS_BUF_TO_AGF(bp)->agf_lsn)))
- return false;
+ return __this_address;
}
if (!(agf->agf_magicnum == cpu_to_be32(XFS_AGF_MAGIC) &&
@@ -2418,18 +2431,18 @@ xfs_agf_verify(
be32_to_cpu(agf->agf_flfirst) < XFS_AGFL_SIZE(mp) &&
be32_to_cpu(agf->agf_fllast) < XFS_AGFL_SIZE(mp) &&
be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp)))
- return false;
+ return __this_address;
if (be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) < 1 ||
be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]) < 1 ||
be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) > XFS_BTREE_MAXLEVELS ||
be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]) > XFS_BTREE_MAXLEVELS)
- return false;
+ return __this_address;
if (xfs_sb_version_hasrmapbt(&mp->m_sb) &&
(be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]) < 1 ||
be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]) > XFS_BTREE_MAXLEVELS))
- return false;
+ return __this_address;
/*
* during growfs operations, the perag is not fully initialised,
@@ -2438,18 +2451,18 @@ xfs_agf_verify(
* so we can detect and avoid this problem.
*/
if (bp->b_pag && be32_to_cpu(agf->agf_seqno) != bp->b_pag->pag_agno)
- return false;
+ return __this_address;
if (xfs_sb_version_haslazysbcount(&mp->m_sb) &&
be32_to_cpu(agf->agf_btreeblks) > be32_to_cpu(agf->agf_length))
- return false;
+ return __this_address;
if (xfs_sb_version_hasreflink(&mp->m_sb) &&
(be32_to_cpu(agf->agf_refcount_level) < 1 ||
be32_to_cpu(agf->agf_refcount_level) > XFS_BTREE_MAXLEVELS))
- return false;
+ return __this_address;
- return true;;
+ return NULL;
}
@@ -2458,28 +2471,29 @@ xfs_agf_read_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_target->bt_mount;
+ xfs_failaddr_t fa;
if (xfs_sb_version_hascrc(&mp->m_sb) &&
!xfs_buf_verify_cksum(bp, XFS_AGF_CRC_OFF))
- xfs_buf_ioerror(bp, -EFSBADCRC);
- else if (XFS_TEST_ERROR(!xfs_agf_verify(mp, bp), mp,
- XFS_ERRTAG_ALLOC_READ_AGF))
- xfs_buf_ioerror(bp, -EFSCORRUPTED);
-
- if (bp->b_error)
- xfs_verifier_error(bp);
+ xfs_verifier_error(bp, -EFSBADCRC, __this_address);
+ else {
+ fa = xfs_agf_verify(bp);
+ if (XFS_TEST_ERROR(fa, mp, XFS_ERRTAG_ALLOC_READ_AGF))
+ xfs_verifier_error(bp, -EFSCORRUPTED, fa);
+ }
}
static void
xfs_agf_write_verify(
struct xfs_buf *bp)
{
- struct xfs_mount *mp = bp->b_target->bt_mount;
- struct xfs_buf_log_item *bip = bp->b_fspriv;
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_buf_log_item *bip = bp->b_log_item;
+ xfs_failaddr_t fa;
- if (!xfs_agf_verify(mp, bp)) {
- xfs_buf_ioerror(bp, -EFSCORRUPTED);
- xfs_verifier_error(bp);
+ fa = xfs_agf_verify(bp);
+ if (fa) {
+ xfs_verifier_error(bp, -EFSCORRUPTED, fa);
return;
}
@@ -2496,6 +2510,7 @@ const struct xfs_buf_ops xfs_agf_buf_ops = {
.name = "xfs_agf",
.verify_read = xfs_agf_read_verify,
.verify_write = xfs_agf_write_verify,
+ .verify_struct = xfs_agf_verify,
};
/*
@@ -2981,3 +2996,22 @@ xfs_verify_fsbno(
return false;
return xfs_verify_agbno(mp, agno, XFS_FSB_TO_AGBNO(mp, fsbno));
}
+
+/* Is there a record covering a given extent? */
+int
+xfs_alloc_has_record(
+ struct xfs_btree_cur *cur,
+ xfs_agblock_t bno,
+ xfs_extlen_t len,
+ bool *exists)
+{
+ union xfs_btree_irec low;
+ union xfs_btree_irec high;
+
+ memset(&low, 0, sizeof(low));
+ low.a.ar_startblock = bno;
+ memset(&high, 0xFF, sizeof(high));
+ high.a.ar_startblock = bno + len - 1;
+
+ return xfs_btree_has_record(cur, &low, &high, exists);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 22:47:14 +0000