*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
+ * Copyright (c) 2011 Nexenta Systems, Inc. All rights reserved.
*/
#include <sys/zfs_context.h>
#include <sys/dmu_objset.h>
#include <sys/arc.h>
#include <sys/ddt.h>
-
-/*
- * ==========================================================================
- * I/O priority table
- * ==========================================================================
- */
-uint8_t zio_priority_table[ZIO_PRIORITY_TABLE_SIZE] = {
- 0, /* ZIO_PRIORITY_NOW */
- 0, /* ZIO_PRIORITY_SYNC_READ */
- 0, /* ZIO_PRIORITY_SYNC_WRITE */
- 0, /* ZIO_PRIORITY_LOG_WRITE */
- 1, /* ZIO_PRIORITY_CACHE_FILL */
- 1, /* ZIO_PRIORITY_AGG */
- 4, /* ZIO_PRIORITY_FREE */
- 4, /* ZIO_PRIORITY_ASYNC_WRITE */
- 6, /* ZIO_PRIORITY_ASYNC_READ */
- 10, /* ZIO_PRIORITY_RESILVER */
- 20, /* ZIO_PRIORITY_SCRUB */
- 2, /* ZIO_PRIORITY_DDT_PREFETCH */
-};
+#include <sys/blkptr.h>
+#include <sys/zfeature.h>
/*
* ==========================================================================
* I/O type descriptions
* ==========================================================================
*/
-char *zio_type_name[ZIO_TYPES] = {
- "zio_null", "zio_read", "zio_write", "zio_free", "zio_claim",
- "zio_ioctl"
+const char *zio_type_name[ZIO_TYPES] = {
+ "z_null", "z_rd", "z_wr", "z_fr", "z_cl", "z_ioctl"
};
/*
kmem_cache_t *zio_link_cache;
kmem_cache_t *zio_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT];
kmem_cache_t *zio_data_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT];
+int zio_delay_max = ZIO_DELAY_MAX;
-#ifdef _KERNEL
-extern vmem_t *zio_alloc_arena;
-#endif
+/*
+ * The following actions directly effect the spa's sync-to-convergence logic.
+ * The values below define the sync pass when we start performing the action.
+ * Care should be taken when changing these values as they directly impact
+ * spa_sync() performance. Tuning these values may introduce subtle performance
+ * pathologies and should only be done in the context of performance analysis.
+ * These tunables will eventually be removed and replaced with #defines once
+ * enough analysis has been done to determine optimal values.
+ *
+ * The 'zfs_sync_pass_deferred_free' pass must be greater than 1 to ensure that
+ * regular blocks are not deferred.
+ */
+int zfs_sync_pass_deferred_free = 2; /* defer frees starting in this pass */
+int zfs_sync_pass_dont_compress = 5; /* don't compress starting in this pass */
+int zfs_sync_pass_rewrite = 2; /* rewrite new bps starting in this pass */
/*
* An allocating zio is one that either currently has the DVA allocate
*/
#define IO_IS_ALLOCATING(zio) ((zio)->io_orig_pipeline & ZIO_STAGE_DVA_ALLOCATE)
-boolean_t zio_requeue_io_start_cut_in_line = B_TRUE;
+int zio_requeue_io_start_cut_in_line = 1;
#ifdef ZFS_DEBUG
int zio_buf_debug_limit = 16384;
int zio_buf_debug_limit = 0;
#endif
+static inline void __zio_execute(zio_t *zio);
+
void
zio_init(void)
{
size_t c;
vmem_t *data_alloc_arena = NULL;
-#ifdef _KERNEL
- data_alloc_arena = zio_alloc_arena;
-#endif
zio_cache = kmem_cache_create("zio_cache",
sizeof (zio_t), 0, NULL, NULL, NULL, NULL, NULL, 0);
zio_link_cache = kmem_cache_create("zio_link_cache",
size_t size = (c + 1) << SPA_MINBLOCKSHIFT;
size_t p2 = size;
size_t align = 0;
+ size_t cflags = (size > zio_buf_debug_limit) ? KMC_NODEBUG : 0;
while (p2 & (p2 - 1))
p2 &= p2 - 1;
+#ifndef _KERNEL
+ /*
+ * If we are using watchpoints, put each buffer on its own page,
+ * to eliminate the performance overhead of trapping to the
+ * kernel when modifying a non-watched buffer that shares the
+ * page with a watched buffer.
+ */
+ if (arc_watch && !IS_P2ALIGNED(size, PAGESIZE))
+ continue;
+#endif
if (size <= 4 * SPA_MINBLOCKSIZE) {
align = SPA_MINBLOCKSIZE;
- } else if (P2PHASE(size, PAGESIZE) == 0) {
+ } else if (IS_P2ALIGNED(size, PAGESIZE)) {
align = PAGESIZE;
- } else if (P2PHASE(size, p2 >> 2) == 0) {
+ } else if (IS_P2ALIGNED(size, p2 >> 2)) {
align = p2 >> 2;
}
char name[36];
(void) sprintf(name, "zio_buf_%lu", (ulong_t)size);
zio_buf_cache[c] = kmem_cache_create(name, size,
- align, NULL, NULL, NULL, NULL, NULL,
- size > zio_buf_debug_limit ? KMC_NODEBUG : 0);
+ align, NULL, NULL, NULL, NULL, NULL, cflags);
(void) sprintf(name, "zio_data_buf_%lu", (ulong_t)size);
zio_data_buf_cache[c] = kmem_cache_create(name, size,
- align, NULL, NULL, NULL, NULL, data_alloc_arena,
- size > zio_buf_debug_limit ? KMC_NODEBUG : 0);
+ align, NULL, NULL, NULL, NULL,
+ data_alloc_arena, cflags);
}
}
}
zio_inject_init();
+
+ lz4_init();
}
void
kmem_cache_destroy(zio_cache);
zio_inject_fini();
+
+ lz4_fini();
}
/*
{
size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
- ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
+ ASSERT3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
return (kmem_cache_alloc(zio_buf_cache[c], KM_PUSHPAGE));
}
if (zio->io_error == 0 &&
zio_decompress_data(BP_GET_COMPRESS(zio->io_bp),
zio->io_data, data, zio->io_size, size) != 0)
- zio->io_error = EIO;
+ zio->io_error = SET_ERROR(EIO);
}
/*
return (waiting);
}
-static void
+__attribute__((always_inline))
+static inline void
zio_notify_parent(zio_t *pio, zio_t *zio, enum zio_wait_type wait)
{
uint64_t *countp = &pio->io_children[zio->io_child_type][wait];
*errorp = zio_worst_error(*errorp, zio->io_error);
pio->io_reexecute |= zio->io_reexecute;
ASSERT3U(*countp, >, 0);
- if (--*countp == 0 && pio->io_stall == countp) {
+
+ (*countp)--;
+
+ if (*countp == 0 && pio->io_stall == countp) {
pio->io_stall = NULL;
mutex_exit(&pio->io_lock);
- zio_execute(pio);
+ __zio_execute(pio);
} else {
mutex_exit(&pio->io_lock);
}
static zio_t *
zio_create(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp,
void *data, uint64_t size, zio_done_func_t *done, void *private,
- zio_type_t type, int priority, enum zio_flag flags,
- vdev_t *vd, uint64_t offset, const zbookmark_t *zb,
+ zio_type_t type, zio_priority_t priority, enum zio_flag flags,
+ vdev_t *vd, uint64_t offset, const zbookmark_phys_t *zb,
enum zio_stage stage, enum zio_stage pipeline)
{
zio_t *zio;
zio_add_child(pio, zio);
}
+ taskq_init_ent(&zio->io_tqent);
+
return (zio);
}
zio_t *
zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
void *data, uint64_t size, zio_done_func_t *done, void *private,
- int priority, enum zio_flag flags, const zbookmark_t *zb)
+ zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb)
{
zio_t *zio;
zio_t *
zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
void *data, uint64_t size, const zio_prop_t *zp,
- zio_done_func_t *ready, zio_done_func_t *done, void *private,
- int priority, enum zio_flag flags, const zbookmark_t *zb)
+ zio_done_func_t *ready, zio_done_func_t *physdone, zio_done_func_t *done,
+ void *private,
+ zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb)
{
zio_t *zio;
zp->zp_checksum < ZIO_CHECKSUM_FUNCTIONS &&
zp->zp_compress >= ZIO_COMPRESS_OFF &&
zp->zp_compress < ZIO_COMPRESS_FUNCTIONS &&
- zp->zp_type < DMU_OT_NUMTYPES &&
+ DMU_OT_IS_VALID(zp->zp_type) &&
zp->zp_level < 32 &&
zp->zp_copies > 0 &&
- zp->zp_copies <= spa_max_replication(spa) &&
- zp->zp_dedup <= 1 &&
- zp->zp_dedup_verify <= 1);
+ zp->zp_copies <= spa_max_replication(spa));
zio = zio_create(pio, spa, txg, bp, data, size, done, private,
ZIO_TYPE_WRITE, priority, flags, NULL, 0, zb,
ZIO_DDT_CHILD_WRITE_PIPELINE : ZIO_WRITE_PIPELINE);
zio->io_ready = ready;
+ zio->io_physdone = physdone;
zio->io_prop = *zp;
+ /*
+ * Data can be NULL if we are going to call zio_write_override() to
+ * provide the already-allocated BP. But we may need the data to
+ * verify a dedup hit (if requested). In this case, don't try to
+ * dedup (just take the already-allocated BP verbatim).
+ */
+ if (data == NULL && zio->io_prop.zp_dedup_verify) {
+ zio->io_prop.zp_dedup = zio->io_prop.zp_dedup_verify = B_FALSE;
+ }
+
return (zio);
}
zio_t *
zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, void *data,
- uint64_t size, zio_done_func_t *done, void *private, int priority,
- enum zio_flag flags, zbookmark_t *zb)
+ uint64_t size, zio_done_func_t *done, void *private,
+ zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb)
{
zio_t *zio;
}
void
-zio_write_override(zio_t *zio, blkptr_t *bp, int copies)
+zio_write_override(zio_t *zio, blkptr_t *bp, int copies, boolean_t nopwrite)
{
ASSERT(zio->io_type == ZIO_TYPE_WRITE);
ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
ASSERT(zio->io_stage == ZIO_STAGE_OPEN);
ASSERT(zio->io_txg == spa_syncing_txg(zio->io_spa));
+ /*
+ * We must reset the io_prop to match the values that existed
+ * when the bp was first written by dmu_sync() keeping in mind
+ * that nopwrite and dedup are mutually exclusive.
+ */
+ zio->io_prop.zp_dedup = nopwrite ? B_FALSE : zio->io_prop.zp_dedup;
+ zio->io_prop.zp_nopwrite = nopwrite;
zio->io_prop.zp_copies = copies;
zio->io_bp_override = bp;
}
void
zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp)
{
- bplist_append(&spa->spa_free_bplist[txg & TXG_MASK], bp);
+
+ /*
+ * The check for EMBEDDED is a performance optimization. We
+ * process the free here (by ignoring it) rather than
+ * putting it on the list and then processing it in zio_free_sync().
+ */
+ if (BP_IS_EMBEDDED(bp))
+ return;
+ metaslab_check_free(spa, bp);
+
+ /*
+ * Frees that are for the currently-syncing txg, are not going to be
+ * deferred, and which will not need to do a read (i.e. not GANG or
+ * DEDUP), can be processed immediately. Otherwise, put them on the
+ * in-memory list for later processing.
+ */
+ if (BP_IS_GANG(bp) || BP_GET_DEDUP(bp) ||
+ txg != spa->spa_syncing_txg ||
+ spa_sync_pass(spa) >= zfs_sync_pass_deferred_free) {
+ bplist_append(&spa->spa_free_bplist[txg & TXG_MASK], bp);
+ } else {
+ VERIFY0(zio_wait(zio_free_sync(NULL, spa, txg, bp, 0)));
+ }
}
zio_t *
enum zio_flag flags)
{
zio_t *zio;
-
- dprintf_bp(bp, "freeing in txg %llu, pass %u",
- (longlong_t)txg, spa->spa_sync_pass);
+ enum zio_stage stage = ZIO_FREE_PIPELINE;
ASSERT(!BP_IS_HOLE(bp));
ASSERT(spa_syncing_txg(spa) == txg);
- ASSERT(spa_sync_pass(spa) <= SYNC_PASS_DEFERRED_FREE);
+ ASSERT(spa_sync_pass(spa) < zfs_sync_pass_deferred_free);
+
+ if (BP_IS_EMBEDDED(bp))
+ return (zio_null(pio, spa, NULL, NULL, NULL, 0));
+
+ metaslab_check_free(spa, bp);
+ arc_freed(spa, bp);
+
+ /*
+ * GANG and DEDUP blocks can induce a read (for the gang block header,
+ * or the DDT), so issue them asynchronously so that this thread is
+ * not tied up.
+ */
+ if (BP_IS_GANG(bp) || BP_GET_DEDUP(bp))
+ stage |= ZIO_STAGE_ISSUE_ASYNC;
zio = zio_create(pio, spa, txg, bp, NULL, BP_GET_PSIZE(bp),
- NULL, NULL, ZIO_TYPE_FREE, ZIO_PRIORITY_FREE, flags,
- NULL, 0, NULL, ZIO_STAGE_OPEN, ZIO_FREE_PIPELINE);
+ NULL, NULL, ZIO_TYPE_FREE, ZIO_PRIORITY_NOW, flags,
+ NULL, 0, NULL, ZIO_STAGE_OPEN, stage);
return (zio);
}
{
zio_t *zio;
+ dprintf_bp(bp, "claiming in txg %llu", txg);
+
+ if (BP_IS_EMBEDDED(bp))
+ return (zio_null(pio, spa, NULL, NULL, NULL, 0));
+
/*
* A claim is an allocation of a specific block. Claims are needed
* to support immediate writes in the intent log. The issue is that
zio_t *
zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd,
- zio_done_func_t *done, void *private, int priority, enum zio_flag flags)
+ zio_done_func_t *done, void *private, enum zio_flag flags)
{
zio_t *zio;
int c;
if (vd->vdev_children == 0) {
zio = zio_create(pio, spa, 0, NULL, NULL, 0, done, private,
- ZIO_TYPE_IOCTL, priority, flags, vd, 0, NULL,
+ ZIO_TYPE_IOCTL, ZIO_PRIORITY_NOW, flags, vd, 0, NULL,
ZIO_STAGE_OPEN, ZIO_IOCTL_PIPELINE);
zio->io_cmd = cmd;
for (c = 0; c < vd->vdev_children; c++)
zio_nowait(zio_ioctl(zio, spa, vd->vdev_child[c], cmd,
- done, private, priority, flags));
+ done, private, flags));
}
return (zio);
zio_t *
zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size,
void *data, int checksum, zio_done_func_t *done, void *private,
- int priority, enum zio_flag flags, boolean_t labels)
+ zio_priority_t priority, enum zio_flag flags, boolean_t labels)
{
zio_t *zio;
ASSERT3U(offset + size, <=, vd->vdev_psize);
zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, done, private,
- ZIO_TYPE_READ, priority, flags, vd, offset, NULL,
- ZIO_STAGE_OPEN, ZIO_READ_PHYS_PIPELINE);
+ ZIO_TYPE_READ, priority, flags | ZIO_FLAG_PHYSICAL, vd, offset,
+ NULL, ZIO_STAGE_OPEN, ZIO_READ_PHYS_PIPELINE);
zio->io_prop.zp_checksum = checksum;
zio_t *
zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size,
void *data, int checksum, zio_done_func_t *done, void *private,
- int priority, enum zio_flag flags, boolean_t labels)
+ zio_priority_t priority, enum zio_flag flags, boolean_t labels)
{
zio_t *zio;
ASSERT3U(offset + size, <=, vd->vdev_psize);
zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, done, private,
- ZIO_TYPE_WRITE, priority, flags, vd, offset, NULL,
- ZIO_STAGE_OPEN, ZIO_WRITE_PHYS_PIPELINE);
+ ZIO_TYPE_WRITE, priority, flags | ZIO_FLAG_PHYSICAL, vd, offset,
+ NULL, ZIO_STAGE_OPEN, ZIO_WRITE_PHYS_PIPELINE);
zio->io_prop.zp_checksum = checksum;
*/
zio_t *
zio_vdev_child_io(zio_t *pio, blkptr_t *bp, vdev_t *vd, uint64_t offset,
- void *data, uint64_t size, int type, int priority, enum zio_flag flags,
- zio_done_func_t *done, void *private)
+ void *data, uint64_t size, int type, zio_priority_t priority,
+ enum zio_flag flags, zio_done_func_t *done, void *private)
{
enum zio_stage pipeline = ZIO_VDEV_CHILD_PIPELINE;
zio_t *zio;
done, private, type, priority, flags, vd, offset, &pio->io_bookmark,
ZIO_STAGE_VDEV_IO_START >> 1, pipeline);
+ zio->io_physdone = pio->io_physdone;
+ if (vd->vdev_ops->vdev_op_leaf && zio->io_logical != NULL)
+ zio->io_logical->io_phys_children++;
+
return (zio);
}
zio_t *
zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, void *data, uint64_t size,
- int type, int priority, enum zio_flag flags,
+ int type, zio_priority_t priority, enum zio_flag flags,
zio_done_func_t *done, void *private)
{
zio_t *zio;
zio = zio_create(NULL, vd->vdev_spa, 0, NULL,
data, size, done, private, type, priority,
- flags | ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_RETRY,
+ flags | ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_RETRY | ZIO_FLAG_DELEGATED,
vd, offset, NULL,
ZIO_STAGE_VDEV_IO_START >> 1, ZIO_VDEV_CHILD_PIPELINE);
zio_flush(zio_t *zio, vdev_t *vd)
{
zio_nowait(zio_ioctl(zio, zio->io_spa, vd, DKIOCFLUSHWRITECACHE,
- NULL, NULL, ZIO_PRIORITY_NOW,
+ NULL, NULL,
ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY));
}
if (BP_GET_COMPRESS(bp) != ZIO_COMPRESS_OFF &&
zio->io_child_type == ZIO_CHILD_LOGICAL &&
!(zio->io_flags & ZIO_FLAG_RAW)) {
- uint64_t psize = BP_GET_PSIZE(bp);
+ uint64_t psize =
+ BP_IS_EMBEDDED(bp) ? BPE_GET_PSIZE(bp) : BP_GET_PSIZE(bp);
void *cbuf = zio_buf_alloc(psize);
zio_push_transform(zio, cbuf, psize, psize, zio_decompress);
}
- if (!dmu_ot[BP_GET_TYPE(bp)].ot_metadata && BP_GET_LEVEL(bp) == 0)
+ if (BP_IS_EMBEDDED(bp) && BPE_GET_ETYPE(bp) == BP_EMBEDDED_TYPE_DATA) {
+ zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
+ decode_embedded_bp_compressed(bp, zio->io_data);
+ } else {
+ ASSERT(!BP_IS_EMBEDDED(bp));
+ }
+
+ if (!DMU_OT_IS_METADATA(BP_GET_TYPE(bp)) && BP_GET_LEVEL(bp) == 0)
zio->io_flags |= ZIO_FLAG_DONT_CACHE;
if (BP_GET_TYPE(bp) == DMU_OT_DDT_ZAP)
*bp = *zio->io_bp_override;
zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
+ if (BP_IS_EMBEDDED(bp))
+ return (ZIO_PIPELINE_CONTINUE);
+
+ /*
+ * If we've been overridden and nopwrite is set then
+ * set the flag accordingly to indicate that a nopwrite
+ * has already occurred.
+ */
+ if (!BP_IS_HOLE(bp) && zp->zp_nopwrite) {
+ ASSERT(!zp->zp_dedup);
+ zio->io_flags |= ZIO_FLAG_NOPWRITE;
+ return (ZIO_PIPELINE_CONTINUE);
+ }
+
+ ASSERT(!zp->zp_nopwrite);
+
if (BP_IS_HOLE(bp) || !zp->zp_dedup)
return (ZIO_PIPELINE_CONTINUE);
zio->io_pipeline |= ZIO_STAGE_DDT_WRITE;
return (ZIO_PIPELINE_CONTINUE);
}
- zio->io_bp_override = NULL;
- BP_ZERO(bp);
}
- if (bp->blk_birth == zio->io_txg) {
+ if (!BP_IS_HOLE(bp) && bp->blk_birth == zio->io_txg) {
/*
* We're rewriting an existing block, which means we're
* working on behalf of spa_sync(). For spa_sync() to
ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
ASSERT(!BP_GET_DEDUP(bp));
- if (pass > SYNC_PASS_DONT_COMPRESS)
+ if (pass >= zfs_sync_pass_dont_compress)
compress = ZIO_COMPRESS_OFF;
/* Make sure someone doesn't change their mind on overwrites */
- ASSERT(MIN(zp->zp_copies + BP_IS_GANG(bp),
+ ASSERT(BP_IS_EMBEDDED(bp) || MIN(zp->zp_copies + BP_IS_GANG(bp),
spa_max_replication(spa)) == BP_GET_NDVAS(bp));
}
if (psize == 0 || psize == lsize) {
compress = ZIO_COMPRESS_OFF;
zio_buf_free(cbuf, lsize);
+ } else if (!zp->zp_dedup && psize <= BPE_PAYLOAD_SIZE &&
+ zp->zp_level == 0 && !DMU_OT_HAS_FILL(zp->zp_type) &&
+ spa_feature_is_enabled(spa, SPA_FEATURE_EMBEDDED_DATA)) {
+ encode_embedded_bp_compressed(bp,
+ cbuf, compress, lsize, psize);
+ BPE_SET_ETYPE(bp, BP_EMBEDDED_TYPE_DATA);
+ BP_SET_TYPE(bp, zio->io_prop.zp_type);
+ BP_SET_LEVEL(bp, zio->io_prop.zp_level);
+ zio_buf_free(cbuf, lsize);
+ bp->blk_birth = zio->io_txg;
+ zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
+ ASSERT(spa_feature_is_active(spa,
+ SPA_FEATURE_EMBEDDED_DATA));
+ return (ZIO_PIPELINE_CONTINUE);
} else {
- ASSERT(psize < lsize);
- zio_push_transform(zio, cbuf, psize, lsize, NULL);
+ /*
+ * Round up compressed size to MINBLOCKSIZE and
+ * zero the tail.
+ */
+ size_t rounded =
+ P2ROUNDUP(psize, (size_t)SPA_MINBLOCKSIZE);
+ if (rounded > psize) {
+ bzero((char *)cbuf + psize, rounded - psize);
+ psize = rounded;
+ }
+ if (psize == lsize) {
+ compress = ZIO_COMPRESS_OFF;
+ zio_buf_free(cbuf, lsize);
+ } else {
+ zio_push_transform(zio, cbuf,
+ psize, lsize, NULL);
+ }
}
}
* spa_sync() to allocate new blocks, but force rewrites after that.
* There should only be a handful of blocks after pass 1 in any case.
*/
- if (bp->blk_birth == zio->io_txg && BP_GET_PSIZE(bp) == psize &&
- pass > SYNC_PASS_REWRITE) {
+ if (!BP_IS_HOLE(bp) && bp->blk_birth == zio->io_txg &&
+ BP_GET_PSIZE(bp) == psize &&
+ pass >= zfs_sync_pass_rewrite) {
enum zio_stage gang_stages = zio->io_pipeline & ZIO_GANG_STAGES;
ASSERT(psize != 0);
zio->io_pipeline = ZIO_REWRITE_PIPELINE | gang_stages;
}
if (psize == 0) {
+ if (zio->io_bp_orig.blk_birth != 0 &&
+ spa_feature_is_active(spa, SPA_FEATURE_HOLE_BIRTH)) {
+ BP_SET_LSIZE(bp, lsize);
+ BP_SET_TYPE(bp, zp->zp_type);
+ BP_SET_LEVEL(bp, zp->zp_level);
+ BP_SET_BIRTH(bp, zio->io_txg, 0);
+ }
zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
} else {
ASSERT(zp->zp_checksum != ZIO_CHECKSUM_GANG_HEADER);
BP_SET_LSIZE(bp, lsize);
+ BP_SET_TYPE(bp, zp->zp_type);
+ BP_SET_LEVEL(bp, zp->zp_level);
BP_SET_PSIZE(bp, psize);
BP_SET_COMPRESS(bp, compress);
BP_SET_CHECKSUM(bp, zp->zp_checksum);
- BP_SET_TYPE(bp, zp->zp_type);
- BP_SET_LEVEL(bp, zp->zp_level);
BP_SET_DEDUP(bp, zp->zp_dedup);
BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER);
if (zp->zp_dedup) {
ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE));
zio->io_pipeline = ZIO_DDT_WRITE_PIPELINE;
}
+ if (zp->zp_nopwrite) {
+ ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
+ ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE));
+ zio->io_pipeline |= ZIO_STAGE_NOP_WRITE;
+ }
}
return (ZIO_PIPELINE_CONTINUE);
*/
static void
-zio_taskq_dispatch(zio_t *zio, enum zio_taskq_type q, boolean_t cutinline)
+zio_taskq_dispatch(zio_t *zio, zio_taskq_type_t q, boolean_t cutinline)
{
spa_t *spa = zio->io_spa;
zio_type_t t = zio->io_type;
- int flags = TQ_SLEEP | (cutinline ? TQ_FRONT : 0);
+ int flags = (cutinline ? TQ_FRONT : 0);
/*
* If we're a config writer or a probe, the normal issue and
t = ZIO_TYPE_NULL;
/*
- * If this is a high priority I/O, then use the high priority taskq.
+ * If this is a high priority I/O, then use the high priority taskq if
+ * available.
*/
if (zio->io_priority == ZIO_PRIORITY_NOW &&
- spa->spa_zio_taskq[t][q + 1] != NULL)
+ spa->spa_zio_taskq[t][q + 1].stqs_count != 0)
q++;
ASSERT3U(q, <, ZIO_TASKQ_TYPES);
- (void) taskq_dispatch(spa->spa_zio_taskq[t][q],
- (task_func_t *)zio_execute, zio, flags);
+
+ /*
+ * NB: We are assuming that the zio can only be dispatched
+ * to a single taskq at a time. It would be a grievous error
+ * to dispatch the zio to another taskq at the same time.
+ */
+ ASSERT(taskq_empty_ent(&zio->io_tqent));
+ spa_taskq_dispatch_ent(spa, t, q, (task_func_t *)zio_execute, zio,
+ flags, &zio->io_tqent);
}
static boolean_t
-zio_taskq_member(zio_t *zio, enum zio_taskq_type q)
+zio_taskq_member(zio_t *zio, zio_taskq_type_t q)
{
kthread_t *executor = zio->io_executor;
spa_t *spa = zio->io_spa;
zio_type_t t;
- for (t = 0; t < ZIO_TYPES; t++)
- if (taskq_member(spa->spa_zio_taskq[t][q], executor))
- return (B_TRUE);
+ for (t = 0; t < ZIO_TYPES; t++) {
+ spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q];
+ uint_t i;
+ for (i = 0; i < tqs->stqs_count; i++) {
+ if (taskq_member(tqs->stqs_taskq[i], executor))
+ return (B_TRUE);
+ }
+ }
return (B_FALSE);
}
* vdev-level caching or aggregation; (5) the I/O is deferred
* due to vdev-level queueing; (6) the I/O is handed off to
* another thread. In all cases, the pipeline stops whenever
- * there's no CPU work; it never burns a thread in cv_wait().
+ * there's no CPU work; it never burns a thread in cv_wait_io().
*
* There's no locking on io_stage because there's no legitimate way
* for multiple threads to be attempting to process the same I/O.
*/
static zio_pipe_stage_t *zio_pipeline[];
+/*
+ * zio_execute() is a wrapper around the static function
+ * __zio_execute() so that we can force __zio_execute() to be
+ * inlined. This reduces stack overhead which is important
+ * because __zio_execute() is called recursively in several zio
+ * code paths. zio_execute() itself cannot be inlined because
+ * it is externally visible.
+ */
void
zio_execute(zio_t *zio)
+{
+ fstrans_cookie_t cookie;
+
+ cookie = spl_fstrans_mark();
+ __zio_execute(zio);
+ spl_fstrans_unmark(cookie);
+}
+
+__attribute__((always_inline))
+static inline void
+__zio_execute(zio_t *zio)
{
zio->io_executor = curthread;
while (zio->io_stage < ZIO_STAGE_DONE) {
enum zio_stage pipeline = zio->io_pipeline;
enum zio_stage stage = zio->io_stage;
+ dsl_pool_t *dp;
+ boolean_t cut;
int rv;
ASSERT(!MUTEX_HELD(&zio->io_lock));
ASSERT(stage <= ZIO_STAGE_DONE);
+ dp = spa_get_dsl(zio->io_spa);
+ cut = (stage == ZIO_STAGE_VDEV_IO_START) ?
+ zio_requeue_io_start_cut_in_line : B_FALSE;
+
/*
* If we are in interrupt context and this pipeline stage
* will grab a config lock that is held across I/O,
*/
if ((stage & ZIO_BLOCKING_STAGES) && zio->io_vd == NULL &&
zio_taskq_member(zio, ZIO_TASKQ_INTERRUPT)) {
- boolean_t cut = (stage == ZIO_STAGE_VDEV_IO_START) ?
- zio_requeue_io_start_cut_in_line : B_FALSE;
+ zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, cut);
+ return;
+ }
+
+ /*
+ * If we executing in the context of the tx_sync_thread,
+ * or we are performing pool initialization outside of a
+ * zio_taskq[ZIO_TASKQ_ISSUE|ZIO_TASKQ_ISSUE_HIGH] context.
+ * Then issue the zio asynchronously to minimize stack usage
+ * for these deep call paths.
+ */
+ if ((dp && curthread == dp->dp_tx.tx_sync_thread) ||
+ (dp && spa_is_initializing(dp->dp_spa) &&
+ !zio_taskq_member(zio, ZIO_TASKQ_ISSUE) &&
+ !zio_taskq_member(zio, ZIO_TASKQ_ISSUE_HIGH))) {
zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, cut);
return;
}
zio->io_stage = stage;
- rv = zio_pipeline[highbit(stage) - 1](zio);
+ rv = zio_pipeline[highbit64(stage) - 1](zio);
if (rv == ZIO_PIPELINE_STOP)
return;
}
}
+
/*
* ==========================================================================
* Initiate I/O, either sync or async
zio->io_waiter = curthread;
- zio_execute(zio);
+ __zio_execute(zio);
mutex_enter(&zio->io_lock);
while (zio->io_executor != NULL)
- cv_wait(&zio->io_cv, &zio->io_lock);
+ cv_wait_io(&zio->io_cv, &zio->io_lock);
mutex_exit(&zio->io_lock);
error = zio->io_error;
if (zio->io_child_type == ZIO_CHILD_LOGICAL &&
zio_unique_parent(zio) == NULL) {
+ zio_t *pio;
+
/*
* This is a logical async I/O with no parent to wait for it.
* We add it to the spa_async_root_zio "Godfather" I/O which
* will ensure they complete prior to unloading the pool.
*/
spa_t *spa = zio->io_spa;
+ kpreempt_disable();
+ pio = spa->spa_async_zio_root[CPU_SEQID];
+ kpreempt_enable();
- zio_add_child(spa->spa_async_zio_root, zio);
+ zio_add_child(pio, zio);
}
- zio_execute(zio);
+ __zio_execute(zio);
}
/*
pio->io_stage = pio->io_orig_stage;
pio->io_pipeline = pio->io_orig_pipeline;
pio->io_reexecute = 0;
+ pio->io_flags |= ZIO_FLAG_REEXECUTED;
pio->io_error = 0;
for (w = 0; w < ZIO_WAIT_TYPES; w++)
pio->io_state[w] = 0;
* responsibility of the caller to wait on him.
*/
if (!(pio->io_flags & ZIO_FLAG_GODFATHER))
- zio_execute(pio);
+ __zio_execute(pio);
}
void
"failure and the failure mode property for this pool "
"is set to panic.", spa_name(spa));
+ cmn_err(CE_WARN, "Pool '%s' has encountered an uncorrectable I/O "
+ "failure and has been suspended.\n", spa_name(spa));
+
zfs_ereport_post(FM_EREPORT_ZFS_IO_FAILURE, spa, NULL, NULL, 0, 0);
mutex_enter(&spa->spa_suspend_lock);
zio_write_gang_member_ready(zio_t *zio)
{
zio_t *pio = zio_unique_parent(zio);
- zio_t *gio = zio->io_gang_leader;
dva_t *cdva = zio->io_bp->blk_dva;
dva_t *pdva = pio->io_bp->blk_dva;
uint64_t asize;
int d;
+ ASSERTV(zio_t *gio = zio->io_gang_leader);
if (BP_IS_HOLE(zio->io_bp))
return;
zp.zp_type = DMU_OT_NONE;
zp.zp_level = 0;
zp.zp_copies = gio->io_prop.zp_copies;
- zp.zp_dedup = 0;
- zp.zp_dedup_verify = 0;
+ zp.zp_dedup = B_FALSE;
+ zp.zp_dedup_verify = B_FALSE;
+ zp.zp_nopwrite = B_FALSE;
zio_nowait(zio_write(zio, spa, txg, &gbh->zg_blkptr[g],
(char *)pio->io_data + (pio->io_size - resid), lsize, &zp,
- zio_write_gang_member_ready, NULL, &gn->gn_child[g],
+ zio_write_gang_member_ready, NULL, NULL, &gn->gn_child[g],
pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio),
&pio->io_bookmark));
}
*/
pio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
+ /*
+ * We didn't allocate this bp, so make sure it doesn't get unmarked.
+ */
+ pio->io_flags &= ~ZIO_FLAG_FASTWRITE;
+
zio_nowait(zio);
return (ZIO_PIPELINE_CONTINUE);
}
+/*
+ * The zio_nop_write stage in the pipeline determines if allocating
+ * a new bp is necessary. By leveraging a cryptographically secure checksum,
+ * such as SHA256, we can compare the checksums of the new data and the old
+ * to determine if allocating a new block is required. The nopwrite
+ * feature can handle writes in either syncing or open context (i.e. zil
+ * writes) and as a result is mutually exclusive with dedup.
+ */
+static int
+zio_nop_write(zio_t *zio)
+{
+ blkptr_t *bp = zio->io_bp;
+ blkptr_t *bp_orig = &zio->io_bp_orig;
+ zio_prop_t *zp = &zio->io_prop;
+
+ ASSERT(BP_GET_LEVEL(bp) == 0);
+ ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE));
+ ASSERT(zp->zp_nopwrite);
+ ASSERT(!zp->zp_dedup);
+ ASSERT(zio->io_bp_override == NULL);
+ ASSERT(IO_IS_ALLOCATING(zio));
+
+ /*
+ * Check to see if the original bp and the new bp have matching
+ * characteristics (i.e. same checksum, compression algorithms, etc).
+ * If they don't then just continue with the pipeline which will
+ * allocate a new bp.
+ */
+ if (BP_IS_HOLE(bp_orig) ||
+ !zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_dedup ||
+ BP_GET_CHECKSUM(bp) != BP_GET_CHECKSUM(bp_orig) ||
+ BP_GET_COMPRESS(bp) != BP_GET_COMPRESS(bp_orig) ||
+ BP_GET_DEDUP(bp) != BP_GET_DEDUP(bp_orig) ||
+ zp->zp_copies != BP_GET_NDVAS(bp_orig))
+ return (ZIO_PIPELINE_CONTINUE);
+
+ /*
+ * If the checksums match then reset the pipeline so that we
+ * avoid allocating a new bp and issuing any I/O.
+ */
+ if (ZIO_CHECKSUM_EQUAL(bp->blk_cksum, bp_orig->blk_cksum)) {
+ ASSERT(zio_checksum_table[zp->zp_checksum].ci_dedup);
+ ASSERT3U(BP_GET_PSIZE(bp), ==, BP_GET_PSIZE(bp_orig));
+ ASSERT3U(BP_GET_LSIZE(bp), ==, BP_GET_LSIZE(bp_orig));
+ ASSERT(zp->zp_compress != ZIO_COMPRESS_OFF);
+ ASSERT(bcmp(&bp->blk_prop, &bp_orig->blk_prop,
+ sizeof (uint64_t)) == 0);
+
+ *bp = *bp_orig;
+ zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
+ zio->io_flags |= ZIO_FLAG_NOPWRITE;
+ }
+
+ return (ZIO_PIPELINE_CONTINUE);
+}
+
/*
* ==========================================================================
* Dedup
ddt_exit(ddt);
- error = arc_read_nolock(NULL, spa, &blk,
+ error = arc_read(NULL, spa, &blk,
arc_getbuf_func, &abuf, ZIO_PRIORITY_SYNC_READ,
ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE,
&aflags, &zio->io_bookmark);
if (arc_buf_size(abuf) != zio->io_orig_size ||
bcmp(abuf->b_data, zio->io_orig_data,
zio->io_orig_size) != 0)
- error = EEXIST;
- VERIFY(arc_buf_remove_ref(abuf, &abuf) == 1);
+ error = SET_ERROR(EEXIST);
+ VERIFY(arc_buf_remove_ref(abuf, &abuf));
}
ddt_enter(ddt);
zio_ddt_ditto_write_done(zio_t *zio)
{
int p = DDT_PHYS_DITTO;
- zio_prop_t *zp = &zio->io_prop;
blkptr_t *bp = zio->io_bp;
ddt_t *ddt = ddt_select(zio->io_spa, bp);
ddt_entry_t *dde = zio->io_private;
ddt_phys_t *ddp = &dde->dde_phys[p];
ddt_key_t *ddk = &dde->dde_key;
+ ASSERTV(zio_prop_t *zp = &zio->io_prop);
ddt_enter(ddt);
zio->io_stage = ZIO_STAGE_OPEN;
BP_ZERO(bp);
} else {
- zp->zp_dedup = 0;
+ zp->zp_dedup = B_FALSE;
}
zio->io_pipeline = ZIO_WRITE_PIPELINE;
ddt_exit(ddt);
}
dio = zio_write(zio, spa, txg, bp, zio->io_orig_data,
- zio->io_orig_size, &czp, NULL,
+ zio->io_orig_size, &czp, NULL, NULL,
zio_ddt_ditto_write_done, dde, zio->io_priority,
ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark);
ddt_phys_addref(ddp);
} else {
cio = zio_write(zio, spa, txg, bp, zio->io_orig_data,
- zio->io_orig_size, zp, zio_ddt_child_write_ready,
+ zio->io_orig_size, zp, zio_ddt_child_write_ready, NULL,
zio_ddt_child_write_done, dde, zio->io_priority,
ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark);
ddt_enter(ddt);
freedde = dde = ddt_lookup(ddt, bp, B_TRUE);
- ddp = ddt_phys_select(dde, bp);
- ddt_phys_decref(ddp);
+ if (dde) {
+ ddp = ddt_phys_select(dde, bp);
+ if (ddp)
+ ddt_phys_decref(ddp);
+ }
ddt_exit(ddt);
return (ZIO_PIPELINE_CONTINUE);
metaslab_class_t *mc = spa_normal_class(spa);
blkptr_t *bp = zio->io_bp;
int error;
+ int flags = 0;
if (zio->io_gang_leader == NULL) {
ASSERT(zio->io_child_type > ZIO_CHILD_GANG);
}
ASSERT(BP_IS_HOLE(bp));
- ASSERT3U(BP_GET_NDVAS(bp), ==, 0);
+ ASSERT0(BP_GET_NDVAS(bp));
ASSERT3U(zio->io_prop.zp_copies, >, 0);
ASSERT3U(zio->io_prop.zp_copies, <=, spa_max_replication(spa));
ASSERT3U(zio->io_size, ==, BP_GET_PSIZE(bp));
+ /*
+ * The dump device does not support gang blocks so allocation on
+ * behalf of the dump device (i.e. ZIO_FLAG_NODATA) must avoid
+ * the "fast" gang feature.
+ */
+ flags |= (zio->io_flags & ZIO_FLAG_NODATA) ? METASLAB_GANG_AVOID : 0;
+ flags |= (zio->io_flags & ZIO_FLAG_GANG_CHILD) ?
+ METASLAB_GANG_CHILD : 0;
+ flags |= (zio->io_flags & ZIO_FLAG_FASTWRITE) ? METASLAB_FASTWRITE : 0;
error = metaslab_alloc(spa, mc, zio->io_size, bp,
- zio->io_prop.zp_copies, zio->io_txg, NULL, 0);
+ zio->io_prop.zp_copies, zio->io_txg, NULL, flags);
if (error) {
+ spa_dbgmsg(spa, "%s: metaslab allocation failure: zio %p, "
+ "size %llu, error %d", spa_name(spa), zio, zio->io_size,
+ error);
if (error == ENOSPC && zio->io_size > SPA_MINBLOCKSIZE)
return (zio_write_gang_block(zio));
zio->io_error = error;
* Try to allocate an intent log block. Return 0 on success, errno on failure.
*/
int
-zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, blkptr_t *old_bp,
- uint64_t size, boolean_t use_slog)
+zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, uint64_t size,
+ boolean_t use_slog)
{
int error = 1;
ASSERT(txg > spa_syncing_txg(spa));
- if (use_slog)
+ /*
+ * ZIL blocks are always contiguous (i.e. not gang blocks) so we
+ * set the METASLAB_GANG_AVOID flag so that they don't "fast gang"
+ * when allocating them.
+ */
+ if (use_slog) {
error = metaslab_alloc(spa, spa_log_class(spa), size,
- new_bp, 1, txg, old_bp, METASLAB_HINTBP_AVOID);
+ new_bp, 1, txg, NULL,
+ METASLAB_FASTWRITE | METASLAB_GANG_AVOID);
+ }
- if (error)
+ if (error) {
error = metaslab_alloc(spa, spa_normal_class(spa), size,
- new_bp, 1, txg, old_bp, METASLAB_HINTBP_AVOID);
+ new_bp, 1, txg, NULL,
+ METASLAB_FASTWRITE);
+ }
if (error == 0) {
BP_SET_LSIZE(new_bp, size);
align = 1ULL << vd->vdev_top->vdev_ashift;
- if (P2PHASE(zio->io_size, align) != 0) {
+ if (!(zio->io_flags & ZIO_FLAG_PHYSICAL) &&
+ P2PHASE(zio->io_size, align) != 0) {
+ /* Transform logical writes to be a full physical block size. */
uint64_t asize = P2ROUNDUP(zio->io_size, align);
char *abuf = zio_buf_alloc(asize);
ASSERT(vd == vd->vdev_top);
zio_push_transform(zio, abuf, asize, asize, zio_subblock);
}
- ASSERT(P2PHASE(zio->io_offset, align) == 0);
- ASSERT(P2PHASE(zio->io_size, align) == 0);
+ /*
+ * If this is not a physical io, make sure that it is properly aligned
+ * before proceeding.
+ */
+ if (!(zio->io_flags & ZIO_FLAG_PHYSICAL)) {
+ ASSERT0(P2PHASE(zio->io_offset, align));
+ ASSERT0(P2PHASE(zio->io_size, align));
+ } else {
+ /*
+ * For physical writes, we allow 512b aligned writes and assume
+ * the device will perform a read-modify-write as necessary.
+ */
+ ASSERT0(P2PHASE(zio->io_offset, SPA_MINBLOCKSIZE));
+ ASSERT0(P2PHASE(zio->io_size, SPA_MINBLOCKSIZE));
+ }
+
VERIFY(zio->io_type != ZIO_TYPE_WRITE || spa_writeable(spa));
/*
if (vd->vdev_ops->vdev_op_leaf &&
(zio->io_type == ZIO_TYPE_READ || zio->io_type == ZIO_TYPE_WRITE)) {
- if (zio->io_type == ZIO_TYPE_READ && vdev_cache_read(zio) == 0)
+ if (zio->io_type == ZIO_TYPE_READ && vdev_cache_read(zio))
return (ZIO_PIPELINE_CONTINUE);
if ((zio = vdev_queue_io(zio)) == NULL)
return (ZIO_PIPELINE_STOP);
if (!vdev_accessible(vd, zio)) {
- zio->io_error = ENXIO;
+ zio->io_error = SET_ERROR(ENXIO);
zio_interrupt(zio);
return (ZIO_PIPELINE_STOP);
}
if (zio->io_error) {
if (!vdev_accessible(vd, zio)) {
- zio->io_error = ENXIO;
+ zio->io_error = SET_ERROR(ENXIO);
} else {
unexpected_error = B_TRUE;
}
*/
if (zio->io_error && vd != NULL && vd->vdev_ops->vdev_op_leaf &&
!vdev_accessible(vd, zio))
- zio->io_error = ENXIO;
+ zio->io_error = SET_ERROR(ENXIO);
/*
* If we can't write to an interior vdev (mirror or RAID-Z),
* set vdev_cant_write so that we stop trying to allocate from it.
*/
if (zio->io_error == ENXIO && zio->io_type == ZIO_TYPE_WRITE &&
- vd != NULL && !vd->vdev_ops->vdev_op_leaf)
+ vd != NULL && !vd->vdev_ops->vdev_op_leaf) {
vd->vdev_cant_write = B_TRUE;
+ }
if (zio->io_error)
zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
+ if (vd != NULL && vd->vdev_ops->vdev_op_leaf &&
+ zio->io_physdone != NULL) {
+ ASSERT(!(zio->io_flags & ZIO_FLAG_DELEGATED));
+ ASSERT(zio->io_child_type == ZIO_CHILD_VDEV);
+ zio->io_physdone(zio->io_logical);
+ }
+
return (ZIO_PIPELINE_CONTINUE);
}
/*
* ==========================================================================
* Error rank. Error are ranked in the order 0, ENXIO, ECKSUM, EIO, other.
- * An error of 0 indictes success. ENXIO indicates whole-device failure,
+ * An error of 0 indicates success. ENXIO indicates whole-device failure,
* which may be transient (e.g. unplugged) or permament. ECKSUM and EIO
* indicate errors that are specific to one I/O, and most likely permanent.
* Any other error is presumed to be worse because we weren't expecting it.
if (zio->io_ready) {
ASSERT(IO_IS_ALLOCATING(zio));
- ASSERT(bp->blk_birth == zio->io_txg || BP_IS_HOLE(bp));
+ ASSERT(bp->blk_birth == zio->io_txg || BP_IS_HOLE(bp) ||
+ (zio->io_flags & ZIO_FLAG_NOPWRITE));
ASSERT(zio->io_children[ZIO_CHILD_GANG][ZIO_WAIT_READY] == 0);
zio->io_ready(zio);
static int
zio_done(zio_t *zio)
{
- spa_t *spa = zio->io_spa;
- zio_t *lio = zio->io_logical;
- blkptr_t *bp = zio->io_bp;
- vdev_t *vd = zio->io_vd;
- uint64_t psize = zio->io_size;
zio_t *pio, *pio_next;
int c, w;
for (w = 0; w < ZIO_WAIT_TYPES; w++)
ASSERT(zio->io_children[c][w] == 0);
- if (bp != NULL) {
- ASSERT(bp->blk_pad[0] == 0);
- ASSERT(bp->blk_pad[1] == 0);
- ASSERT(bcmp(bp, &zio->io_bp_copy, sizeof (blkptr_t)) == 0 ||
- (bp == zio_unique_parent(zio)->io_bp));
- if (zio->io_type == ZIO_TYPE_WRITE && !BP_IS_HOLE(bp) &&
+ if (zio->io_bp != NULL && !BP_IS_EMBEDDED(zio->io_bp)) {
+ ASSERT(zio->io_bp->blk_pad[0] == 0);
+ ASSERT(zio->io_bp->blk_pad[1] == 0);
+ ASSERT(bcmp(zio->io_bp, &zio->io_bp_copy,
+ sizeof (blkptr_t)) == 0 ||
+ (zio->io_bp == zio_unique_parent(zio)->io_bp));
+ if (zio->io_type == ZIO_TYPE_WRITE && !BP_IS_HOLE(zio->io_bp) &&
zio->io_bp_override == NULL &&
!(zio->io_flags & ZIO_FLAG_IO_REPAIR)) {
- ASSERT(!BP_SHOULD_BYTESWAP(bp));
- ASSERT3U(zio->io_prop.zp_copies, <=, BP_GET_NDVAS(bp));
- ASSERT(BP_COUNT_GANG(bp) == 0 ||
- (BP_COUNT_GANG(bp) == BP_GET_NDVAS(bp)));
+ ASSERT(!BP_SHOULD_BYTESWAP(zio->io_bp));
+ ASSERT3U(zio->io_prop.zp_copies, <=,
+ BP_GET_NDVAS(zio->io_bp));
+ ASSERT(BP_COUNT_GANG(zio->io_bp) == 0 ||
+ (BP_COUNT_GANG(zio->io_bp) ==
+ BP_GET_NDVAS(zio->io_bp)));
}
+ if (zio->io_flags & ZIO_FLAG_NOPWRITE)
+ VERIFY(BP_EQUAL(zio->io_bp, &zio->io_bp_orig));
}
/*
while (zio->io_cksum_report != NULL) {
zio_cksum_report_t *zcr = zio->io_cksum_report;
uint64_t align = zcr->zcr_align;
- uint64_t asize = P2ROUNDUP(psize, align);
+ uint64_t asize = P2ROUNDUP(zio->io_size, align);
char *abuf = zio->io_data;
- if (asize != psize) {
+ if (asize != zio->io_size) {
abuf = zio_buf_alloc(asize);
- bcopy(zio->io_data, abuf, psize);
- bzero(abuf + psize, asize - psize);
+ bcopy(zio->io_data, abuf, zio->io_size);
+ bzero(abuf+zio->io_size, asize-zio->io_size);
}
zio->io_cksum_report = zcr->zcr_next;
zcr->zcr_finish(zcr, abuf);
zfs_ereport_free_checksum(zcr);
- if (asize != psize)
+ if (asize != zio->io_size)
zio_buf_free(abuf, asize);
}
}
zio_pop_transforms(zio); /* note: may set zio->io_error */
- vdev_stat_update(zio, psize);
+ vdev_stat_update(zio, zio->io_size);
+
+ /*
+ * If this I/O is attached to a particular vdev is slow, exceeding
+ * 30 seconds to complete, post an error described the I/O delay.
+ * We ignore these errors if the device is currently unavailable.
+ */
+ if (zio->io_delay >= MSEC_TO_TICK(zio_delay_max)) {
+ if (zio->io_vd != NULL && !vdev_is_dead(zio->io_vd))
+ zfs_ereport_post(FM_EREPORT_ZFS_DELAY, zio->io_spa,
+ zio->io_vd, zio, 0, 0);
+ }
if (zio->io_error) {
/*
* at the block level. We ignore these errors if the
* device is currently unavailable.
*/
- if (zio->io_error != ECKSUM && vd != NULL && !vdev_is_dead(vd))
- zfs_ereport_post(FM_EREPORT_ZFS_IO, spa, vd, zio, 0, 0);
+ if (zio->io_error != ECKSUM && zio->io_vd != NULL &&
+ !vdev_is_dead(zio->io_vd))
+ zfs_ereport_post(FM_EREPORT_ZFS_IO, zio->io_spa,
+ zio->io_vd, zio, 0, 0);
if ((zio->io_error == EIO || !(zio->io_flags &
(ZIO_FLAG_SPECULATIVE | ZIO_FLAG_DONT_PROPAGATE))) &&
- zio == lio) {
+ zio == zio->io_logical) {
/*
* For logical I/O requests, tell the SPA to log the
* error and generate a logical data ereport.
*/
- spa_log_error(spa, zio);
- zfs_ereport_post(FM_EREPORT_ZFS_DATA, spa, NULL, zio,
- 0, 0);
+ spa_log_error(zio->io_spa, zio);
+ zfs_ereport_post(FM_EREPORT_ZFS_DATA, zio->io_spa,
+ NULL, zio, 0, 0);
}
}
- if (zio->io_error && zio == lio) {
+ if (zio->io_error && zio == zio->io_logical) {
/*
* Determine whether zio should be reexecuted. This will
* propagate all the way to the root via zio_notify_parent().
*/
- ASSERT(vd == NULL && bp != NULL);
+ ASSERT(zio->io_vd == NULL && zio->io_bp != NULL);
ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
if (IO_IS_ALLOCATING(zio) &&
zio->io_type == ZIO_TYPE_FREE) &&
!(zio->io_flags & ZIO_FLAG_SCAN_THREAD) &&
zio->io_error == ENXIO &&
- spa_load_state(spa) == SPA_LOAD_NONE &&
- spa_get_failmode(spa) != ZIO_FAILURE_MODE_CONTINUE)
+ spa_load_state(zio->io_spa) == SPA_LOAD_NONE &&
+ spa_get_failmode(zio->io_spa) != ZIO_FAILURE_MODE_CONTINUE)
zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND;
if (!(zio->io_flags & ZIO_FLAG_CANFAIL) && !zio->io_reexecute)
if ((zio->io_error || zio->io_reexecute) &&
IO_IS_ALLOCATING(zio) && zio->io_gang_leader == zio &&
- !(zio->io_flags & ZIO_FLAG_IO_REWRITE))
- zio_dva_unallocate(zio, zio->io_gang_tree, bp);
+ !(zio->io_flags & (ZIO_FLAG_IO_REWRITE | ZIO_FLAG_NOPWRITE)))
+ zio_dva_unallocate(zio, zio->io_gang_tree, zio->io_bp);
zio_gang_tree_free(&zio->io_gang_tree);
* We'd fail again if we reexecuted now, so suspend
* until conditions improve (e.g. device comes online).
*/
- zio_suspend(spa, zio);
+ zio_suspend(zio->io_spa, zio);
} else {
/*
* Reexecution is potentially a huge amount of work.
* Hand it off to the otherwise-unused claim taskq.
*/
- (void) taskq_dispatch(
- spa->spa_zio_taskq[ZIO_TYPE_CLAIM][ZIO_TASKQ_ISSUE],
- (task_func_t *)zio_reexecute, zio, TQ_SLEEP);
+ ASSERT(taskq_empty_ent(&zio->io_tqent));
+ spa_taskq_dispatch_ent(zio->io_spa,
+ ZIO_TYPE_CLAIM, ZIO_TASKQ_ISSUE,
+ (task_func_t *)zio_reexecute, zio, 0,
+ &zio->io_tqent);
}
return (ZIO_PIPELINE_STOP);
}
zfs_ereport_free_checksum(zcr);
}
+ if (zio->io_flags & ZIO_FLAG_FASTWRITE && zio->io_bp &&
+ !BP_IS_HOLE(zio->io_bp) && !BP_IS_EMBEDDED(zio->io_bp) &&
+ !(zio->io_flags & ZIO_FLAG_NOPWRITE)) {
+ metaslab_fastwrite_unmark(zio->io_spa, zio->io_bp);
+ }
+
/*
* It is the responsibility of the done callback to ensure that this
* particular zio is no longer discoverable for adoption, and as
zio_issue_async,
zio_write_bp_init,
zio_checksum_generate,
+ zio_nop_write,
zio_ddt_read_start,
zio_ddt_read_done,
zio_ddt_write,
zio_checksum_verify,
zio_done
};
+
+/* dnp is the dnode for zb1->zb_object */
+boolean_t
+zbookmark_is_before(const dnode_phys_t *dnp, const zbookmark_phys_t *zb1,
+ const zbookmark_phys_t *zb2)
+{
+ uint64_t zb1nextL0, zb2thisobj;
+
+ ASSERT(zb1->zb_objset == zb2->zb_objset);
+ ASSERT(zb2->zb_level == 0);
+
+ /* The objset_phys_t isn't before anything. */
+ if (dnp == NULL)
+ return (B_FALSE);
+
+ zb1nextL0 = (zb1->zb_blkid + 1) <<
+ ((zb1->zb_level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT));
+
+ zb2thisobj = zb2->zb_object ? zb2->zb_object :
+ zb2->zb_blkid << (DNODE_BLOCK_SHIFT - DNODE_SHIFT);
+
+ if (zb1->zb_object == DMU_META_DNODE_OBJECT) {
+ uint64_t nextobj = zb1nextL0 *
+ (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT) >> DNODE_SHIFT;
+ return (nextobj <= zb2thisobj);
+ }
+
+ if (zb1->zb_object < zb2thisobj)
+ return (B_TRUE);
+ if (zb1->zb_object > zb2thisobj)
+ return (B_FALSE);
+ if (zb2->zb_object == DMU_META_DNODE_OBJECT)
+ return (B_FALSE);
+ return (zb1nextL0 <= zb2->zb_blkid);
+}
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(zio_type_name);
+EXPORT_SYMBOL(zio_buf_alloc);
+EXPORT_SYMBOL(zio_data_buf_alloc);
+EXPORT_SYMBOL(zio_buf_free);
+EXPORT_SYMBOL(zio_data_buf_free);
+
+module_param(zio_delay_max, int, 0644);
+MODULE_PARM_DESC(zio_delay_max, "Max zio millisec delay before posting event");
+
+module_param(zio_requeue_io_start_cut_in_line, int, 0644);
+MODULE_PARM_DESC(zio_requeue_io_start_cut_in_line, "Prioritize requeued I/O");
+
+module_param(zfs_sync_pass_deferred_free, int, 0644);
+MODULE_PARM_DESC(zfs_sync_pass_deferred_free,
+ "Defer frees starting in this pass");
+
+module_param(zfs_sync_pass_dont_compress, int, 0644);
+MODULE_PARM_DESC(zfs_sync_pass_dont_compress,
+ "Don't compress starting in this pass");
+
+module_param(zfs_sync_pass_rewrite, int, 0644);
+MODULE_PARM_DESC(zfs_sync_pass_rewrite,
+ "Rewrite new bps starting in this pass");
+#endif
projects / mirror_zfs-debian.git / blobdiff