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authorGeorge Wilson <[email protected]>2013-07-02 13:26:24 -0700
committerBrian Behlendorf <[email protected]>2013-07-02 13:34:31 -0700
commit294f68063b49c06d3118d51016811063e69cf97a (patch)
tree2450bfc2356c54752214fb11fad14766c6c1ddb1 /module/zfs/dmu_traverse.c
parent96b89346c074516a9bb130907646814208035ca8 (diff)
Illumos #3498 panic in arc_read()
3498 panic in arc_read(): !refcount_is_zero(&pbuf->b_hdr->b_refcnt) Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Approved by: Richard Lowe <[email protected]> References: illumos/illumos-gate@1b912ec7100c10e7243bf0879af0fe580e08c73d https://www.illumos.org/issues/3498 Ported-by: Brian Behlendorf <[email protected]> Closes #1249
Diffstat (limited to 'module/zfs/dmu_traverse.c')
-rw-r--r--module/zfs/dmu_traverse.c79
1 files changed, 35 insertions, 44 deletions
diff --git a/module/zfs/dmu_traverse.c b/module/zfs/dmu_traverse.c
index 370a28aeb..1c3972371 100644
--- a/module/zfs/dmu_traverse.c
+++ b/module/zfs/dmu_traverse.c
@@ -62,9 +62,9 @@ typedef struct traverse_data {
} traverse_data_t;
static int traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp,
- arc_buf_t *buf, uint64_t objset, uint64_t object);
+ uint64_t objset, uint64_t object);
static void prefetch_dnode_metadata(traverse_data_t *td, const dnode_phys_t *,
- arc_buf_t *buf, uint64_t objset, uint64_t object);
+ uint64_t objset, uint64_t object);
static int
traverse_zil_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg)
@@ -81,7 +81,7 @@ traverse_zil_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg)
SET_BOOKMARK(&zb, td->td_objset, ZB_ZIL_OBJECT, ZB_ZIL_LEVEL,
bp->blk_cksum.zc_word[ZIL_ZC_SEQ]);
- (void) td->td_func(td->td_spa, zilog, bp, NULL, &zb, NULL, td->td_arg);
+ (void) td->td_func(td->td_spa, zilog, bp, &zb, NULL, td->td_arg);
return (0);
}
@@ -105,7 +105,7 @@ traverse_zil_record(zilog_t *zilog, lr_t *lrc, void *arg, uint64_t claim_txg)
SET_BOOKMARK(&zb, td->td_objset, lr->lr_foid,
ZB_ZIL_LEVEL, lr->lr_offset / BP_GET_LSIZE(bp));
- (void) td->td_func(td->td_spa, zilog, bp, NULL, &zb, NULL,
+ (void) td->td_func(td->td_spa, zilog, bp, &zb, NULL,
td->td_arg);
}
return (0);
@@ -182,7 +182,7 @@ traverse_pause(traverse_data_t *td, const zbookmark_t *zb)
static void
traverse_prefetch_metadata(traverse_data_t *td,
- arc_buf_t *pbuf, const blkptr_t *bp, const zbookmark_t *zb)
+ const blkptr_t *bp, const zbookmark_t *zb)
{
uint32_t flags = ARC_NOWAIT | ARC_PREFETCH;
@@ -200,14 +200,13 @@ traverse_prefetch_metadata(traverse_data_t *td,
if (BP_GET_LEVEL(bp) == 0 && BP_GET_TYPE(bp) != DMU_OT_DNODE)
return;
- (void) arc_read(NULL, td->td_spa, bp,
- pbuf, NULL, NULL, ZIO_PRIORITY_ASYNC_READ,
- ZIO_FLAG_CANFAIL, &flags, zb);
+ (void) arc_read(NULL, td->td_spa, bp, NULL, NULL,
+ ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
}
static int
traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
- arc_buf_t *pbuf, const blkptr_t *bp, const zbookmark_t *zb)
+ const blkptr_t *bp, const zbookmark_t *zb)
{
zbookmark_t czb;
int err = 0, lasterr = 0;
@@ -228,8 +227,7 @@ traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
}
if (BP_IS_HOLE(bp)) {
- err = td->td_func(td->td_spa, NULL, NULL, pbuf, zb, dnp,
- td->td_arg);
+ err = td->td_func(td->td_spa, NULL, NULL, zb, dnp, td->td_arg);
return (err);
}
@@ -249,7 +247,7 @@ traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
}
if (td->td_flags & TRAVERSE_PRE) {
- err = td->td_func(td->td_spa, NULL, bp, pbuf, zb, dnp,
+ err = td->td_func(td->td_spa, NULL, bp, zb, dnp,
td->td_arg);
if (err == TRAVERSE_VISIT_NO_CHILDREN)
return (0);
@@ -265,8 +263,7 @@ traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
blkptr_t *cbp;
int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
- err = dsl_read(NULL, td->td_spa, bp, pbuf,
- arc_getbuf_func, &buf,
+ err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf,
ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
if (err)
return (err);
@@ -276,7 +273,7 @@ traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
zb->zb_level - 1,
zb->zb_blkid * epb + i);
- traverse_prefetch_metadata(td, buf, &cbp[i], &czb);
+ traverse_prefetch_metadata(td, &cbp[i], &czb);
}
/* recursively visitbp() blocks below this */
@@ -284,7 +281,7 @@ traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
zb->zb_level - 1,
zb->zb_blkid * epb + i);
- err = traverse_visitbp(td, dnp, buf, &cbp[i], &czb);
+ err = traverse_visitbp(td, dnp, &cbp[i], &czb);
if (err) {
if (!hard)
break;
@@ -296,21 +293,20 @@ traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
int i;
int epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT;
- err = dsl_read(NULL, td->td_spa, bp, pbuf,
- arc_getbuf_func, &buf,
+ err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf,
ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
if (err)
return (err);
dnp = buf->b_data;
for (i = 0; i < epb; i++) {
- prefetch_dnode_metadata(td, &dnp[i], buf, zb->zb_objset,
+ prefetch_dnode_metadata(td, &dnp[i], zb->zb_objset,
zb->zb_blkid * epb + i);
}
/* recursively visitbp() blocks below this */
for (i = 0; i < epb; i++) {
- err = traverse_dnode(td, &dnp[i], buf, zb->zb_objset,
+ err = traverse_dnode(td, &dnp[i], zb->zb_objset,
zb->zb_blkid * epb + i);
if (err) {
if (!hard)
@@ -323,24 +319,23 @@ traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
objset_phys_t *osp;
dnode_phys_t *dnp;
- err = dsl_read_nolock(NULL, td->td_spa, bp,
- arc_getbuf_func, &buf,
+ err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf,
ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
if (err)
return (err);
osp = buf->b_data;
dnp = &osp->os_meta_dnode;
- prefetch_dnode_metadata(td, dnp, buf, zb->zb_objset,
+ prefetch_dnode_metadata(td, dnp, zb->zb_objset,
DMU_META_DNODE_OBJECT);
if (arc_buf_size(buf) >= sizeof (objset_phys_t)) {
prefetch_dnode_metadata(td, &osp->os_userused_dnode,
- buf, zb->zb_objset, DMU_USERUSED_OBJECT);
+ zb->zb_objset, DMU_USERUSED_OBJECT);
prefetch_dnode_metadata(td, &osp->os_groupused_dnode,
- buf, zb->zb_objset, DMU_USERUSED_OBJECT);
+ zb->zb_objset, DMU_USERUSED_OBJECT);
}
- err = traverse_dnode(td, dnp, buf, zb->zb_objset,
+ err = traverse_dnode(td, dnp, zb->zb_objset,
DMU_META_DNODE_OBJECT);
if (err && hard) {
lasterr = err;
@@ -348,7 +343,7 @@ traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
}
if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) {
dnp = &osp->os_userused_dnode;
- err = traverse_dnode(td, dnp, buf, zb->zb_objset,
+ err = traverse_dnode(td, dnp, zb->zb_objset,
DMU_USERUSED_OBJECT);
}
if (err && hard) {
@@ -357,7 +352,7 @@ traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
}
if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) {
dnp = &osp->os_groupused_dnode;
- err = traverse_dnode(td, dnp, buf, zb->zb_objset,
+ err = traverse_dnode(td, dnp, zb->zb_objset,
DMU_GROUPUSED_OBJECT);
}
}
@@ -367,8 +362,7 @@ traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
post:
if (err == 0 && lasterr == 0 && (td->td_flags & TRAVERSE_POST)) {
- err = td->td_func(td->td_spa, NULL, bp, pbuf, zb, dnp,
- td->td_arg);
+ err = td->td_func(td->td_spa, NULL, bp, zb, dnp, td->td_arg);
if (err == ERESTART)
pause = B_TRUE;
}
@@ -384,25 +378,25 @@ post:
static void
prefetch_dnode_metadata(traverse_data_t *td, const dnode_phys_t *dnp,
- arc_buf_t *buf, uint64_t objset, uint64_t object)
+ uint64_t objset, uint64_t object)
{
int j;
zbookmark_t czb;
for (j = 0; j < dnp->dn_nblkptr; j++) {
SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j);
- traverse_prefetch_metadata(td, buf, &dnp->dn_blkptr[j], &czb);
+ traverse_prefetch_metadata(td, &dnp->dn_blkptr[j], &czb);
}
if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) {
SET_BOOKMARK(&czb, objset, object, 0, DMU_SPILL_BLKID);
- traverse_prefetch_metadata(td, buf, &dnp->dn_spill, &czb);
+ traverse_prefetch_metadata(td, &dnp->dn_spill, &czb);
}
}
static int
traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp,
- arc_buf_t *buf, uint64_t objset, uint64_t object)
+ uint64_t objset, uint64_t object)
{
int j, err = 0, lasterr = 0;
zbookmark_t czb;
@@ -410,7 +404,7 @@ traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp,
for (j = 0; j < dnp->dn_nblkptr; j++) {
SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j);
- err = traverse_visitbp(td, dnp, buf, &dnp->dn_blkptr[j], &czb);
+ err = traverse_visitbp(td, dnp, &dnp->dn_blkptr[j], &czb);
if (err) {
if (!hard)
break;
@@ -420,7 +414,7 @@ traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp,
if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) {
SET_BOOKMARK(&czb, objset, object, 0, DMU_SPILL_BLKID);
- err = traverse_visitbp(td, dnp, buf, &dnp->dn_spill, &czb);
+ err = traverse_visitbp(td, dnp, &dnp->dn_spill, &czb);
if (err) {
if (!hard)
return (err);
@@ -433,8 +427,7 @@ traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp,
/* ARGSUSED */
static int
traverse_prefetcher(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
- arc_buf_t *pbuf, const zbookmark_t *zb, const dnode_phys_t *dnp,
- void *arg)
+ const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
{
prefetch_data_t *pfd = arg;
uint32_t aflags = ARC_NOWAIT | ARC_PREFETCH;
@@ -455,10 +448,8 @@ traverse_prefetcher(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
cv_broadcast(&pfd->pd_cv);
mutex_exit(&pfd->pd_mtx);
- (void) dsl_read(NULL, spa, bp, pbuf, NULL, NULL,
- ZIO_PRIORITY_ASYNC_READ,
- ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE,
- &aflags, zb);
+ (void) arc_read(NULL, spa, bp, NULL, NULL, ZIO_PRIORITY_ASYNC_READ,
+ ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE, &aflags, zb);
return (0);
}
@@ -476,7 +467,7 @@ traverse_prefetch_thread(void *arg)
SET_BOOKMARK(&czb, td.td_objset,
ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
- (void) traverse_visitbp(&td, NULL, NULL, td.td_rootbp, &czb);
+ (void) traverse_visitbp(&td, NULL, td.td_rootbp, &czb);
mutex_enter(&td_main->td_pfd->pd_mtx);
td_main->td_pfd->pd_exited = B_TRUE;
@@ -544,7 +535,7 @@ traverse_impl(spa_t *spa, dsl_dataset_t *ds, uint64_t objset, blkptr_t *rootbp,
SET_BOOKMARK(czb, td->td_objset,
ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
- err = traverse_visitbp(td, NULL, NULL, rootbp, czb);
+ err = traverse_visitbp(td, NULL, rootbp, czb);
mutex_enter(&pd->pd_mtx);
pd->pd_cancel = B_TRUE;