* CDDL HEADER END
*/
/*
- * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <sys/zfs_context.h>
#include <sys/zio_impl.h>
#include <sys/zio_compress.h>
#include <sys/zio_checksum.h>
+#include <sys/dmu_objset.h>
+#include <sys/arc.h>
+#include <sys/ddt.h>
/*
* ==========================================================================
0, /* ZIO_PRIORITY_NOW */
0, /* ZIO_PRIORITY_SYNC_READ */
0, /* ZIO_PRIORITY_SYNC_WRITE */
- 6, /* ZIO_PRIORITY_ASYNC_READ */
- 4, /* ZIO_PRIORITY_ASYNC_WRITE */
- 4, /* ZIO_PRIORITY_FREE */
- 0, /* ZIO_PRIORITY_CACHE_FILL */
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 */
};
/*
* ==========================================================================
*/
char *zio_type_name[ZIO_TYPES] = {
- "null", "read", "write", "free", "claim", "ioctl" };
-
-#define SYNC_PASS_DEFERRED_FREE 1 /* defer frees after this pass */
-#define SYNC_PASS_DONT_COMPRESS 4 /* don't compress after this pass */
-#define SYNC_PASS_REWRITE 1 /* rewrite new bps after this pass */
+ "zio_null", "zio_read", "zio_write", "zio_free", "zio_claim",
+ "zio_ioctl"
+};
/*
* ==========================================================================
* An allocating zio is one that either currently has the DVA allocate
* stage set or will have it later in its lifetime.
*/
-#define IO_IS_ALLOCATING(zio) \
- ((zio)->io_orig_pipeline & (1U << ZIO_STAGE_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;
+
+#ifdef ZFS_DEBUG
+int zio_buf_debug_limit = 16384;
+#else
+int zio_buf_debug_limit = 0;
+#endif
void
zio_init(void)
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, KMC_NODEBUG);
+ align, NULL, NULL, NULL, NULL, NULL,
+ size > zio_buf_debug_limit ? KMC_NODEBUG : 0);
(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,
- KMC_NODEBUG);
+ size > zio_buf_debug_limit ? KMC_NODEBUG : 0);
}
}
zt->zt_transform(zio,
zt->zt_orig_data, zt->zt_orig_size);
- zio_buf_free(zio->io_data, zt->zt_bufsize);
+ if (zt->zt_bufsize != 0)
+ zio_buf_free(zio->io_data, zt->zt_bufsize);
zio->io_data = zt->zt_orig_data;
zio->io_size = zt->zt_orig_size;
{
if (zio->io_error == 0 &&
zio_decompress_data(BP_GET_COMPRESS(zio->io_bp),
- zio->io_data, zio->io_size, data, size) != 0)
+ zio->io_data, data, zio->io_size, size) != 0)
zio->io_error = EIO;
}
list_insert_head(&pio->io_child_list, zl);
list_insert_head(&cio->io_parent_list, zl);
+ pio->io_child_count++;
+ cio->io_parent_count++;
+
mutex_exit(&pio->io_lock);
mutex_exit(&cio->io_lock);
}
list_remove(&pio->io_child_list, zl);
list_remove(&cio->io_parent_list, zl);
+ pio->io_child_count--;
+ cio->io_parent_count--;
+
mutex_exit(&pio->io_lock);
mutex_exit(&cio->io_lock);
mutex_enter(&zio->io_lock);
ASSERT(zio->io_stall == NULL);
if (*countp != 0) {
- zio->io_stage--;
+ zio->io_stage >>= 1;
zio->io_stall = countp;
waiting = B_TRUE;
}
* ==========================================================================
*/
static zio_t *
-zio_create(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
+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, int flags, vdev_t *vd, uint64_t offset,
- const zbookmark_t *zb, uint8_t stage, uint32_t pipeline)
+ zio_type_t type, int priority, enum zio_flag flags,
+ vdev_t *vd, uint64_t offset, const zbookmark_t *zb,
+ enum zio_stage stage, enum zio_stage pipeline)
{
zio_t *zio;
zio->io_child_type = ZIO_CHILD_VDEV;
else if (flags & ZIO_FLAG_GANG_CHILD)
zio->io_child_type = ZIO_CHILD_GANG;
+ else if (flags & ZIO_FLAG_DDT_CHILD)
+ zio->io_child_type = ZIO_CHILD_DDT;
else
zio->io_child_type = ZIO_CHILD_LOGICAL;
if (bp != NULL) {
- zio->io_bp = bp;
+ zio->io_bp = (blkptr_t *)bp;
zio->io_bp_copy = *bp;
zio->io_bp_orig = *bp;
- if (type != ZIO_TYPE_WRITE)
+ if (type != ZIO_TYPE_WRITE ||
+ zio->io_child_type == ZIO_CHILD_DDT)
zio->io_bp = &zio->io_bp_copy; /* so caller can free */
if (zio->io_child_type == ZIO_CHILD_LOGICAL)
zio->io_logical = zio;
zio->io_spa = spa;
zio->io_txg = txg;
- zio->io_data = data;
- zio->io_size = size;
zio->io_done = done;
zio->io_private = private;
zio->io_type = type;
zio->io_priority = priority;
zio->io_vd = vd;
zio->io_offset = offset;
+ zio->io_orig_data = zio->io_data = data;
+ zio->io_orig_size = zio->io_size = size;
zio->io_orig_flags = zio->io_flags = flags;
zio->io_orig_stage = zio->io_stage = stage;
zio->io_orig_pipeline = zio->io_pipeline = pipeline;
zio_t *
zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, zio_done_func_t *done,
- void *private, int flags)
+ void *private, enum zio_flag flags)
{
zio_t *zio;
}
zio_t *
-zio_root(spa_t *spa, zio_done_func_t *done, void *private, int flags)
+zio_root(spa_t *spa, zio_done_func_t *done, void *private, enum zio_flag flags)
{
return (zio_null(NULL, spa, NULL, done, private, flags));
}
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, int flags, const zbookmark_t *zb)
+ int priority, enum zio_flag flags, const zbookmark_t *zb)
{
zio_t *zio;
- zio = zio_create(pio, spa, bp->blk_birth, (blkptr_t *)bp,
+ zio = zio_create(pio, spa, BP_PHYSICAL_BIRTH(bp), bp,
data, size, done, private,
ZIO_TYPE_READ, priority, flags, NULL, 0, zb,
- ZIO_STAGE_OPEN, ZIO_READ_PIPELINE);
+ ZIO_STAGE_OPEN, (flags & ZIO_FLAG_DDT_CHILD) ?
+ ZIO_DDT_CHILD_READ_PIPELINE : ZIO_READ_PIPELINE);
return (zio);
}
-void
-zio_skip_write(zio_t *zio)
-{
- ASSERT(zio->io_type == ZIO_TYPE_WRITE);
- ASSERT(zio->io_stage == ZIO_STAGE_READY);
- ASSERT(!BP_IS_GANG(zio->io_bp));
-
- zio->io_pipeline &= ~ZIO_VDEV_IO_STAGES;
-}
-
zio_t *
zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
- void *data, uint64_t size, zio_prop_t *zp,
+ void *data, uint64_t size, const zio_prop_t *zp,
zio_done_func_t *ready, zio_done_func_t *done, void *private,
- int priority, int flags, const zbookmark_t *zb)
+ int priority, enum zio_flag flags, const zbookmark_t *zb)
{
zio_t *zio;
zp->zp_compress < ZIO_COMPRESS_FUNCTIONS &&
zp->zp_type < DMU_OT_NUMTYPES &&
zp->zp_level < 32 &&
- zp->zp_ndvas > 0 &&
- zp->zp_ndvas <= spa_max_replication(spa));
- ASSERT(ready != NULL);
+ zp->zp_copies > 0 &&
+ zp->zp_copies <= spa_max_replication(spa) &&
+ zp->zp_dedup <= 1 &&
+ zp->zp_dedup_verify <= 1);
zio = zio_create(pio, spa, txg, bp, data, size, done, private,
ZIO_TYPE_WRITE, priority, flags, NULL, 0, zb,
- ZIO_STAGE_OPEN, ZIO_WRITE_PIPELINE);
+ ZIO_STAGE_OPEN, (flags & ZIO_FLAG_DDT_CHILD) ?
+ ZIO_DDT_CHILD_WRITE_PIPELINE : ZIO_WRITE_PIPELINE);
zio->io_ready = ready;
zio->io_prop = *zp;
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,
- int flags, zbookmark_t *zb)
+ enum zio_flag flags, zbookmark_t *zb)
{
zio_t *zio;
return (zio);
}
+void
+zio_write_override(zio_t *zio, blkptr_t *bp, int copies)
+{
+ 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));
+
+ 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);
+}
+
zio_t *
-zio_free(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
- zio_done_func_t *done, void *private, int flags)
+zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp,
+ enum zio_flag flags)
{
zio_t *zio;
- ASSERT(!BP_IS_HOLE(bp));
+ dprintf_bp(bp, "freeing in txg %llu, pass %u",
+ (longlong_t)txg, spa->spa_sync_pass);
- if (bp->blk_fill == BLK_FILL_ALREADY_FREED)
- return (zio_null(pio, spa, NULL, NULL, NULL, flags));
-
- if (txg == spa->spa_syncing_txg &&
- spa_sync_pass(spa) > SYNC_PASS_DEFERRED_FREE) {
- bplist_enqueue_deferred(&spa->spa_sync_bplist, bp);
- return (zio_null(pio, spa, NULL, NULL, NULL, flags));
- }
+ ASSERT(!BP_IS_HOLE(bp));
+ ASSERT(spa_syncing_txg(spa) == txg);
+ ASSERT(spa_sync_pass(spa) <= SYNC_PASS_DEFERRED_FREE);
zio = zio_create(pio, spa, txg, bp, NULL, BP_GET_PSIZE(bp),
- done, private, ZIO_TYPE_FREE, ZIO_PRIORITY_FREE, flags,
+ NULL, NULL, ZIO_TYPE_FREE, ZIO_PRIORITY_FREE, flags,
NULL, 0, NULL, ZIO_STAGE_OPEN, ZIO_FREE_PIPELINE);
return (zio);
}
zio_t *
-zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
- zio_done_func_t *done, void *private, int flags)
+zio_claim(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp,
+ zio_done_func_t *done, void *private, enum zio_flag flags)
{
zio_t *zio;
*
* All claims *must* be resolved in the first txg -- before the SPA
* starts allocating blocks -- so that nothing is allocated twice.
+ * If txg == 0 we just verify that the block is claimable.
*/
ASSERT3U(spa->spa_uberblock.ub_rootbp.blk_birth, <, spa_first_txg(spa));
- ASSERT3U(spa_first_txg(spa), <=, txg);
+ ASSERT(txg == spa_first_txg(spa) || txg == 0);
+ ASSERT(!BP_GET_DEDUP(bp) || !spa_writeable(spa)); /* zdb(1M) */
zio = zio_create(pio, spa, txg, bp, NULL, BP_GET_PSIZE(bp),
done, private, ZIO_TYPE_CLAIM, ZIO_PRIORITY_NOW, flags,
zio_t *
zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd,
- zio_done_func_t *done, void *private, int priority, int flags)
+ zio_done_func_t *done, void *private, int priority, enum zio_flag flags)
{
zio_t *zio;
int c;
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, int flags, boolean_t labels)
+ int priority, enum zio_flag flags, boolean_t labels)
{
zio_t *zio;
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, int flags, boolean_t labels)
+ int priority, enum zio_flag flags, boolean_t labels)
{
zio_t *zio;
zio->io_prop.zp_checksum = checksum;
- if (zio_checksum_table[checksum].ci_zbt) {
+ if (zio_checksum_table[checksum].ci_eck) {
/*
- * zbt checksums are necessarily destructive -- they modify
+ * zec checksums are necessarily destructive -- they modify
* the end of the write buffer to hold the verifier/checksum.
* Therefore, we must make a local copy in case the data is
* being written to multiple places in parallel.
*/
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, int flags,
+ void *data, uint64_t size, int type, int priority, enum zio_flag flags,
zio_done_func_t *done, void *private)
{
- uint32_t pipeline = ZIO_VDEV_CHILD_PIPELINE;
+ enum zio_stage pipeline = ZIO_VDEV_CHILD_PIPELINE;
zio_t *zio;
ASSERT(vd->vdev_parent ==
* detection as close to the leaves as possible and
* eliminates redundant checksums in the interior nodes.
*/
- pipeline |= 1U << ZIO_STAGE_CHECKSUM_VERIFY;
- pio->io_pipeline &= ~(1U << ZIO_STAGE_CHECKSUM_VERIFY);
+ pipeline |= ZIO_STAGE_CHECKSUM_VERIFY;
+ pio->io_pipeline &= ~ZIO_STAGE_CHECKSUM_VERIFY;
}
if (vd->vdev_children == 0)
offset += VDEV_LABEL_START_SIZE;
+ flags |= ZIO_VDEV_CHILD_FLAGS(pio) | ZIO_FLAG_DONT_PROPAGATE;
+
+ /*
+ * If we've decided to do a repair, the write is not speculative --
+ * even if the original read was.
+ */
+ if (flags & ZIO_FLAG_IO_REPAIR)
+ flags &= ~ZIO_FLAG_SPECULATIVE;
+
zio = zio_create(pio, pio->io_spa, pio->io_txg, bp, data, size,
- done, private, type, priority,
- (pio->io_flags & ZIO_FLAG_VDEV_INHERIT) |
- ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_PROPAGATE | flags,
- vd, offset, &pio->io_bookmark,
- ZIO_STAGE_VDEV_IO_START - 1, pipeline);
+ done, private, type, priority, flags, vd, offset, &pio->io_bookmark,
+ ZIO_STAGE_VDEV_IO_START >> 1, pipeline);
return (zio);
}
zio_t *
zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, void *data, uint64_t size,
- int type, int priority, int flags, zio_done_func_t *done, void *private)
+ int type, int priority, enum zio_flag flags,
+ zio_done_func_t *done, void *private)
{
zio_t *zio;
data, size, done, private, type, priority,
flags | ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_RETRY,
vd, offset, NULL,
- ZIO_STAGE_VDEV_IO_START - 1, ZIO_VDEV_CHILD_PIPELINE);
+ ZIO_STAGE_VDEV_IO_START >> 1, ZIO_VDEV_CHILD_PIPELINE);
return (zio);
}
ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY));
}
+void
+zio_shrink(zio_t *zio, uint64_t size)
+{
+ ASSERT(zio->io_executor == NULL);
+ ASSERT(zio->io_orig_size == zio->io_size);
+ ASSERT(size <= zio->io_size);
+
+ /*
+ * We don't shrink for raidz because of problems with the
+ * reconstruction when reading back less than the block size.
+ * Note, BP_IS_RAIDZ() assumes no compression.
+ */
+ ASSERT(BP_GET_COMPRESS(zio->io_bp) == ZIO_COMPRESS_OFF);
+ if (!BP_IS_RAIDZ(zio->io_bp))
+ zio->io_orig_size = zio->io_size = size;
+}
+
/*
* ==========================================================================
* Prepare to read and write logical blocks
if (BP_GET_COMPRESS(bp) != ZIO_COMPRESS_OFF &&
zio->io_child_type == ZIO_CHILD_LOGICAL &&
!(zio->io_flags & ZIO_FLAG_RAW)) {
- uint64_t csize = BP_GET_PSIZE(bp);
- void *cbuf = zio_buf_alloc(csize);
+ uint64_t psize = BP_GET_PSIZE(bp);
+ void *cbuf = zio_buf_alloc(psize);
- zio_push_transform(zio, cbuf, csize, csize, zio_decompress);
+ zio_push_transform(zio, cbuf, psize, psize, zio_decompress);
}
if (!dmu_ot[BP_GET_TYPE(bp)].ot_metadata && BP_GET_LEVEL(bp) == 0)
zio->io_flags |= ZIO_FLAG_DONT_CACHE;
+ if (BP_GET_TYPE(bp) == DMU_OT_DDT_ZAP)
+ zio->io_flags |= ZIO_FLAG_DONT_CACHE;
+
+ if (BP_GET_DEDUP(bp) && zio->io_child_type == ZIO_CHILD_LOGICAL)
+ zio->io_pipeline = ZIO_DDT_READ_PIPELINE;
+
return (ZIO_PIPELINE_CONTINUE);
}
static int
zio_write_bp_init(zio_t *zio)
{
+ spa_t *spa = zio->io_spa;
zio_prop_t *zp = &zio->io_prop;
- int compress = zp->zp_compress;
+ enum zio_compress compress = zp->zp_compress;
blkptr_t *bp = zio->io_bp;
- void *cbuf;
uint64_t lsize = zio->io_size;
- uint64_t csize = lsize;
- uint64_t cbufsize = 0;
+ uint64_t psize = lsize;
int pass = 1;
/*
if (!IO_IS_ALLOCATING(zio))
return (ZIO_PIPELINE_CONTINUE);
- ASSERT(compress != ZIO_COMPRESS_INHERIT);
+ ASSERT(zio->io_child_type != ZIO_CHILD_DDT);
+
+ if (zio->io_bp_override) {
+ ASSERT(bp->blk_birth != zio->io_txg);
+ ASSERT(BP_GET_DEDUP(zio->io_bp_override) == 0);
+
+ *bp = *zio->io_bp_override;
+ zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
+
+ if (BP_IS_HOLE(bp) || !zp->zp_dedup)
+ return (ZIO_PIPELINE_CONTINUE);
+
+ ASSERT(zio_checksum_table[zp->zp_checksum].ci_dedup ||
+ zp->zp_dedup_verify);
+
+ if (BP_GET_CHECKSUM(bp) == zp->zp_checksum) {
+ BP_SET_DEDUP(bp, 1);
+ 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) {
/*
* convergence take longer. Therefore, after the first
* few passes, stop compressing to ensure convergence.
*/
- pass = spa_sync_pass(zio->io_spa);
+ pass = spa_sync_pass(spa);
+
+ ASSERT(zio->io_txg == spa_syncing_txg(spa));
+ ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
+ ASSERT(!BP_GET_DEDUP(bp));
if (pass > SYNC_PASS_DONT_COMPRESS)
compress = ZIO_COMPRESS_OFF;
/* Make sure someone doesn't change their mind on overwrites */
- ASSERT(MIN(zp->zp_ndvas + BP_IS_GANG(bp),
- spa_max_replication(zio->io_spa)) == BP_GET_NDVAS(bp));
+ ASSERT(MIN(zp->zp_copies + BP_IS_GANG(bp),
+ spa_max_replication(spa)) == BP_GET_NDVAS(bp));
}
if (compress != ZIO_COMPRESS_OFF) {
- if (!zio_compress_data(compress, zio->io_data, zio->io_size,
- &cbuf, &csize, &cbufsize)) {
+ void *cbuf = zio_buf_alloc(lsize);
+ psize = zio_compress_data(compress, zio->io_data, cbuf, lsize);
+ if (psize == 0 || psize == lsize) {
compress = ZIO_COMPRESS_OFF;
- } else if (csize != 0) {
- zio_push_transform(zio, cbuf, csize, cbufsize, NULL);
+ zio_buf_free(cbuf, lsize);
+ } else {
+ ASSERT(psize < lsize);
+ 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) == csize &&
+ if (bp->blk_birth == zio->io_txg && BP_GET_PSIZE(bp) == psize &&
pass > SYNC_PASS_REWRITE) {
- ASSERT(csize != 0);
- uint32_t gang_stages = zio->io_pipeline & ZIO_GANG_STAGES;
+ ASSERT(psize != 0);
+ enum zio_stage gang_stages = zio->io_pipeline & ZIO_GANG_STAGES;
zio->io_pipeline = ZIO_REWRITE_PIPELINE | gang_stages;
zio->io_flags |= ZIO_FLAG_IO_REWRITE;
} else {
zio->io_pipeline = ZIO_WRITE_PIPELINE;
}
- if (csize == 0) {
+ if (psize == 0) {
zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
} else {
ASSERT(zp->zp_checksum != ZIO_CHECKSUM_GANG_HEADER);
BP_SET_LSIZE(bp, lsize);
- BP_SET_PSIZE(bp, csize);
+ 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_child_type == ZIO_CHILD_LOGICAL);
+ ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE));
+ zio->io_pipeline = ZIO_DDT_WRITE_PIPELINE;
+ }
+ }
+
+ return (ZIO_PIPELINE_CONTINUE);
+}
+
+static int
+zio_free_bp_init(zio_t *zio)
+{
+ blkptr_t *bp = zio->io_bp;
+
+ if (zio->io_child_type == ZIO_CHILD_LOGICAL) {
+ if (BP_GET_DEDUP(bp))
+ zio->io_pipeline = ZIO_DDT_FREE_PIPELINE;
}
return (ZIO_PIPELINE_CONTINUE);
*/
static void
-zio_taskq_dispatch(zio_t *zio, enum zio_taskq_type q)
+zio_taskq_dispatch(zio_t *zio, enum zio_taskq_type 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);
/*
* If we're a config writer or a probe, the normal issue and
if (t == ZIO_TYPE_WRITE && zio->io_vd && zio->io_vd->vdev_aux)
t = ZIO_TYPE_NULL;
- (void) taskq_dispatch(zio->io_spa->spa_zio_taskq[t][q],
- (task_func_t *)zio_execute, zio, TQ_SLEEP);
+ /*
+ * If this is a high priority I/O, then use the high priority taskq.
+ */
+ if (zio->io_priority == ZIO_PRIORITY_NOW &&
+ spa->spa_zio_taskq[t][q + 1] != NULL)
+ q++;
+
+ ASSERT3U(q, <, ZIO_TASKQ_TYPES);
+ (void) taskq_dispatch(spa->spa_zio_taskq[t][q],
+ (task_func_t *)zio_execute, zio, flags);
}
static boolean_t
static int
zio_issue_async(zio_t *zio)
{
- zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE);
+ zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_FALSE);
return (ZIO_PIPELINE_STOP);
}
void
zio_interrupt(zio_t *zio)
{
- zio_taskq_dispatch(zio, ZIO_TASKQ_INTERRUPT);
+ zio_taskq_dispatch(zio, ZIO_TASKQ_INTERRUPT, B_FALSE);
}
/*
* 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_STAGES];
+static zio_pipe_stage_t *zio_pipeline[];
void
zio_execute(zio_t *zio)
zio->io_executor = curthread;
while (zio->io_stage < ZIO_STAGE_DONE) {
- uint32_t pipeline = zio->io_pipeline;
- zio_stage_t stage = zio->io_stage;
+ enum zio_stage pipeline = zio->io_pipeline;
+ enum zio_stage stage = zio->io_stage;
int rv;
ASSERT(!MUTEX_HELD(&zio->io_lock));
+ ASSERT(ISP2(stage));
+ ASSERT(zio->io_stall == NULL);
- while (((1U << ++stage) & pipeline) == 0)
- continue;
+ do {
+ stage <<= 1;
+ } while ((stage & pipeline) == 0);
ASSERT(stage <= ZIO_STAGE_DONE);
- ASSERT(zio->io_stall == NULL);
/*
* If we are in interrupt context and this pipeline stage
* will grab a config lock that is held across I/O,
- * issue async to avoid deadlock.
+ * or may wait for an I/O that needs an interrupt thread
+ * to complete, issue async to avoid deadlock.
+ *
+ * For VDEV_IO_START, we cut in line so that the io will
+ * be sent to disk promptly.
*/
- if (((1U << stage) & ZIO_CONFIG_LOCK_BLOCKING_STAGES) &&
- zio->io_vd == NULL &&
+ if ((stage & ZIO_BLOCKING_STAGES) && zio->io_vd == NULL &&
zio_taskq_member(zio, ZIO_TASKQ_INTERRUPT)) {
- zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE);
+ 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;
}
zio->io_stage = stage;
- rv = zio_pipeline[stage](zio);
+ rv = zio_pipeline[highbit(stage) - 1](zio);
if (rv == ZIO_PIPELINE_STOP)
return;
for (int c = 0; c < ZIO_CHILD_TYPES; c++)
pio->io_child_error[c] = 0;
- if (IO_IS_ALLOCATING(pio)) {
- /*
- * Remember the failed bp so that the io_ready() callback
- * can update its accounting upon reexecution. The block
- * was already freed in zio_done(); we indicate this with
- * a fill count of -1 so that zio_free() knows to skip it.
- */
- blkptr_t *bp = pio->io_bp;
- ASSERT(bp->blk_birth == 0 || bp->blk_birth == pio->io_txg);
- bp->blk_fill = BLK_FILL_ALREADY_FREED;
- pio->io_bp_orig = *bp;
- BP_ZERO(bp);
- }
+ if (IO_IS_ALLOCATING(pio))
+ BP_ZERO(pio->io_bp);
/*
* As we reexecute pio's children, new children could be created.
zio_checksum_compute(zio, BP_GET_CHECKSUM(bp),
data, BP_GET_PSIZE(bp));
}
+ /*
+ * If we are here to damage data for testing purposes,
+ * leave the GBH alone so that we can detect the damage.
+ */
+ if (pio->io_gang_leader->io_flags & ZIO_FLAG_INDUCE_DAMAGE)
+ zio->io_pipeline &= ~ZIO_VDEV_IO_STAGES;
} else {
zio = zio_rewrite(pio, pio->io_spa, pio->io_txg, bp,
data, BP_GET_PSIZE(bp), NULL, NULL, pio->io_priority,
zio_t *
zio_free_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, void *data)
{
- return (zio_free(pio, pio->io_spa, pio->io_txg, bp,
- NULL, NULL, ZIO_GANG_CHILD_FLAGS(pio)));
+ return (zio_free_sync(pio, pio->io_spa, pio->io_txg, bp,
+ ZIO_GANG_CHILD_FLAGS(pio)));
}
/* ARGSUSED */
blkptr_t *bp = zio->io_bp;
ASSERT(gio == zio_unique_parent(zio));
- ASSERT(zio_walk_children(zio) == NULL);
+ ASSERT(zio->io_child_count == 0);
if (zio->io_error)
return;
ASSERT(zio->io_data == gn->gn_gbh);
ASSERT(zio->io_size == SPA_GANGBLOCKSIZE);
- ASSERT(gn->gn_gbh->zg_tail.zbt_magic == ZBT_MAGIC);
+ ASSERT(gn->gn_gbh->zg_tail.zec_magic == ZEC_MAGIC);
for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) {
blkptr_t *gbp = &gn->gn_gbh->zg_blkptr[g];
zio = zio_gang_issue_func[gio->io_type](pio, bp, gn, data);
if (gn != NULL) {
- ASSERT(gn->gn_gbh->zg_tail.zbt_magic == ZBT_MAGIC);
+ ASSERT(gn->gn_gbh->zg_tail.zec_magic == ZEC_MAGIC);
for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) {
blkptr_t *gbp = &gn->gn_gbh->zg_blkptr[g];
ASSERT(BP_IS_HOLE(&zio->io_bp_orig));
ASSERT(zio->io_child_type == ZIO_CHILD_GANG);
- ASSERT3U(zio->io_prop.zp_ndvas, ==, gio->io_prop.zp_ndvas);
- ASSERT3U(zio->io_prop.zp_ndvas, <=, BP_GET_NDVAS(zio->io_bp));
- ASSERT3U(pio->io_prop.zp_ndvas, <=, BP_GET_NDVAS(pio->io_bp));
+ ASSERT3U(zio->io_prop.zp_copies, ==, gio->io_prop.zp_copies);
+ ASSERT3U(zio->io_prop.zp_copies, <=, BP_GET_NDVAS(zio->io_bp));
+ ASSERT3U(pio->io_prop.zp_copies, <=, BP_GET_NDVAS(pio->io_bp));
ASSERT3U(BP_GET_NDVAS(zio->io_bp), <=, BP_GET_NDVAS(pio->io_bp));
mutex_enter(&pio->io_lock);
uint64_t txg = pio->io_txg;
uint64_t resid = pio->io_size;
uint64_t lsize;
- int ndvas = gio->io_prop.zp_ndvas;
- int gbh_ndvas = MIN(ndvas + 1, spa_max_replication(spa));
+ int copies = gio->io_prop.zp_copies;
+ int gbh_copies = MIN(copies + 1, spa_max_replication(spa));
zio_prop_t zp;
int error;
- error = metaslab_alloc(spa, spa->spa_normal_class, SPA_GANGBLOCKSIZE,
- bp, gbh_ndvas, txg, pio == gio ? NULL : gio->io_bp,
+ error = metaslab_alloc(spa, spa_normal_class(spa), SPA_GANGBLOCKSIZE,
+ bp, gbh_copies, txg, pio == gio ? NULL : gio->io_bp,
METASLAB_HINTBP_FAVOR | METASLAB_GANG_HEADER);
if (error) {
pio->io_error = error;
zp.zp_compress = ZIO_COMPRESS_OFF;
zp.zp_type = DMU_OT_NONE;
zp.zp_level = 0;
- zp.zp_ndvas = gio->io_prop.zp_ndvas;
+ zp.zp_copies = gio->io_prop.zp_copies;
+ zp.zp_dedup = 0;
+ zp.zp_dedup_verify = 0;
zio_nowait(zio_write(zio, spa, txg, &gbh->zg_blkptr[g],
(char *)pio->io_data + (pio->io_size - resid), lsize, &zp,
/*
* ==========================================================================
- * Allocate and free blocks
+ * Dedup
* ==========================================================================
*/
+static void
+zio_ddt_child_read_done(zio_t *zio)
+{
+ blkptr_t *bp = zio->io_bp;
+ ddt_entry_t *dde = zio->io_private;
+ ddt_phys_t *ddp;
+ zio_t *pio = zio_unique_parent(zio);
+
+ mutex_enter(&pio->io_lock);
+ ddp = ddt_phys_select(dde, bp);
+ if (zio->io_error == 0)
+ ddt_phys_clear(ddp); /* this ddp doesn't need repair */
+ if (zio->io_error == 0 && dde->dde_repair_data == NULL)
+ dde->dde_repair_data = zio->io_data;
+ else
+ zio_buf_free(zio->io_data, zio->io_size);
+ mutex_exit(&pio->io_lock);
+}
+
+static int
+zio_ddt_read_start(zio_t *zio)
+{
+ blkptr_t *bp = zio->io_bp;
+
+ ASSERT(BP_GET_DEDUP(bp));
+ ASSERT(BP_GET_PSIZE(bp) == zio->io_size);
+ ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
+
+ if (zio->io_child_error[ZIO_CHILD_DDT]) {
+ ddt_t *ddt = ddt_select(zio->io_spa, bp);
+ ddt_entry_t *dde = ddt_repair_start(ddt, bp);
+ ddt_phys_t *ddp = dde->dde_phys;
+ ddt_phys_t *ddp_self = ddt_phys_select(dde, bp);
+ blkptr_t blk;
+
+ ASSERT(zio->io_vsd == NULL);
+ zio->io_vsd = dde;
+
+ if (ddp_self == NULL)
+ return (ZIO_PIPELINE_CONTINUE);
+
+ for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
+ if (ddp->ddp_phys_birth == 0 || ddp == ddp_self)
+ continue;
+ ddt_bp_create(ddt->ddt_checksum, &dde->dde_key, ddp,
+ &blk);
+ zio_nowait(zio_read(zio, zio->io_spa, &blk,
+ zio_buf_alloc(zio->io_size), zio->io_size,
+ zio_ddt_child_read_done, dde, zio->io_priority,
+ ZIO_DDT_CHILD_FLAGS(zio) | ZIO_FLAG_DONT_PROPAGATE,
+ &zio->io_bookmark));
+ }
+ return (ZIO_PIPELINE_CONTINUE);
+ }
+
+ zio_nowait(zio_read(zio, zio->io_spa, bp,
+ zio->io_data, zio->io_size, NULL, NULL, zio->io_priority,
+ ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark));
+
+ return (ZIO_PIPELINE_CONTINUE);
+}
+
+static int
+zio_ddt_read_done(zio_t *zio)
+{
+ blkptr_t *bp = zio->io_bp;
+
+ if (zio_wait_for_children(zio, ZIO_CHILD_DDT, ZIO_WAIT_DONE))
+ return (ZIO_PIPELINE_STOP);
+
+ ASSERT(BP_GET_DEDUP(bp));
+ ASSERT(BP_GET_PSIZE(bp) == zio->io_size);
+ ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
+
+ if (zio->io_child_error[ZIO_CHILD_DDT]) {
+ ddt_t *ddt = ddt_select(zio->io_spa, bp);
+ ddt_entry_t *dde = zio->io_vsd;
+ if (ddt == NULL) {
+ ASSERT(spa_load_state(zio->io_spa) != SPA_LOAD_NONE);
+ return (ZIO_PIPELINE_CONTINUE);
+ }
+ if (dde == NULL) {
+ zio->io_stage = ZIO_STAGE_DDT_READ_START >> 1;
+ zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_FALSE);
+ return (ZIO_PIPELINE_STOP);
+ }
+ if (dde->dde_repair_data != NULL) {
+ bcopy(dde->dde_repair_data, zio->io_data, zio->io_size);
+ zio->io_child_error[ZIO_CHILD_DDT] = 0;
+ }
+ ddt_repair_done(ddt, dde);
+ zio->io_vsd = NULL;
+ }
+
+ ASSERT(zio->io_vsd == NULL);
+
+ return (ZIO_PIPELINE_CONTINUE);
+}
+
+static boolean_t
+zio_ddt_collision(zio_t *zio, ddt_t *ddt, ddt_entry_t *dde)
+{
+ spa_t *spa = zio->io_spa;
+
+ /*
+ * Note: we compare the original data, not the transformed data,
+ * because when zio->io_bp is an override bp, we will not have
+ * pushed the I/O transforms. That's an important optimization
+ * because otherwise we'd compress/encrypt all dmu_sync() data twice.
+ */
+ for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) {
+ zio_t *lio = dde->dde_lead_zio[p];
+
+ if (lio != NULL) {
+ return (lio->io_orig_size != zio->io_orig_size ||
+ bcmp(zio->io_orig_data, lio->io_orig_data,
+ zio->io_orig_size) != 0);
+ }
+ }
+
+ for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) {
+ ddt_phys_t *ddp = &dde->dde_phys[p];
+
+ if (ddp->ddp_phys_birth != 0) {
+ arc_buf_t *abuf = NULL;
+ uint32_t aflags = ARC_WAIT;
+ blkptr_t blk = *zio->io_bp;
+ int error;
+
+ ddt_bp_fill(ddp, &blk, ddp->ddp_phys_birth);
+
+ ddt_exit(ddt);
+
+ error = arc_read_nolock(NULL, spa, &blk,
+ arc_getbuf_func, &abuf, ZIO_PRIORITY_SYNC_READ,
+ ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE,
+ &aflags, &zio->io_bookmark);
+
+ if (error == 0) {
+ 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);
+ }
+
+ ddt_enter(ddt);
+ return (error != 0);
+ }
+ }
+
+ return (B_FALSE);
+}
+
+static void
+zio_ddt_child_write_ready(zio_t *zio)
+{
+ int p = zio->io_prop.zp_copies;
+ ddt_t *ddt = ddt_select(zio->io_spa, zio->io_bp);
+ ddt_entry_t *dde = zio->io_private;
+ ddt_phys_t *ddp = &dde->dde_phys[p];
+ zio_t *pio;
+
+ if (zio->io_error)
+ return;
+
+ ddt_enter(ddt);
+
+ ASSERT(dde->dde_lead_zio[p] == zio);
+
+ ddt_phys_fill(ddp, zio->io_bp);
+
+ while ((pio = zio_walk_parents(zio)) != NULL)
+ ddt_bp_fill(ddp, pio->io_bp, zio->io_txg);
+
+ ddt_exit(ddt);
+}
+
+static void
+zio_ddt_child_write_done(zio_t *zio)
+{
+ int p = zio->io_prop.zp_copies;
+ ddt_t *ddt = ddt_select(zio->io_spa, zio->io_bp);
+ ddt_entry_t *dde = zio->io_private;
+ ddt_phys_t *ddp = &dde->dde_phys[p];
+
+ ddt_enter(ddt);
+
+ ASSERT(ddp->ddp_refcnt == 0);
+ ASSERT(dde->dde_lead_zio[p] == zio);
+ dde->dde_lead_zio[p] = NULL;
+
+ if (zio->io_error == 0) {
+ while (zio_walk_parents(zio) != NULL)
+ ddt_phys_addref(ddp);
+ } else {
+ ddt_phys_clear(ddp);
+ }
+
+ ddt_exit(ddt);
+}
+
+static void
+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;
+
+ ddt_enter(ddt);
+
+ ASSERT(ddp->ddp_refcnt == 0);
+ ASSERT(dde->dde_lead_zio[p] == zio);
+ dde->dde_lead_zio[p] = NULL;
+
+ if (zio->io_error == 0) {
+ ASSERT(ZIO_CHECKSUM_EQUAL(bp->blk_cksum, ddk->ddk_cksum));
+ ASSERT(zp->zp_copies < SPA_DVAS_PER_BP);
+ ASSERT(zp->zp_copies == BP_GET_NDVAS(bp) - BP_IS_GANG(bp));
+ if (ddp->ddp_phys_birth != 0)
+ ddt_phys_free(ddt, ddk, ddp, zio->io_txg);
+ ddt_phys_fill(ddp, bp);
+ }
+
+ ddt_exit(ddt);
+}
+
+static int
+zio_ddt_write(zio_t *zio)
+{
+ spa_t *spa = zio->io_spa;
+ blkptr_t *bp = zio->io_bp;
+ uint64_t txg = zio->io_txg;
+ zio_prop_t *zp = &zio->io_prop;
+ int p = zp->zp_copies;
+ int ditto_copies;
+ zio_t *cio = NULL;
+ zio_t *dio = NULL;
+ ddt_t *ddt = ddt_select(spa, bp);
+ ddt_entry_t *dde;
+ ddt_phys_t *ddp;
+
+ ASSERT(BP_GET_DEDUP(bp));
+ ASSERT(BP_GET_CHECKSUM(bp) == zp->zp_checksum);
+ ASSERT(BP_IS_HOLE(bp) || zio->io_bp_override);
+
+ ddt_enter(ddt);
+ dde = ddt_lookup(ddt, bp, B_TRUE);
+ ddp = &dde->dde_phys[p];
+
+ if (zp->zp_dedup_verify && zio_ddt_collision(zio, ddt, dde)) {
+ /*
+ * If we're using a weak checksum, upgrade to a strong checksum
+ * and try again. If we're already using a strong checksum,
+ * we can't resolve it, so just convert to an ordinary write.
+ * (And automatically e-mail a paper to Nature?)
+ */
+ if (!zio_checksum_table[zp->zp_checksum].ci_dedup) {
+ zp->zp_checksum = spa_dedup_checksum(spa);
+ zio_pop_transforms(zio);
+ zio->io_stage = ZIO_STAGE_OPEN;
+ BP_ZERO(bp);
+ } else {
+ zp->zp_dedup = 0;
+ }
+ zio->io_pipeline = ZIO_WRITE_PIPELINE;
+ ddt_exit(ddt);
+ return (ZIO_PIPELINE_CONTINUE);
+ }
+
+ ditto_copies = ddt_ditto_copies_needed(ddt, dde, ddp);
+ ASSERT(ditto_copies < SPA_DVAS_PER_BP);
+
+ if (ditto_copies > ddt_ditto_copies_present(dde) &&
+ dde->dde_lead_zio[DDT_PHYS_DITTO] == NULL) {
+ zio_prop_t czp = *zp;
+
+ czp.zp_copies = ditto_copies;
+
+ /*
+ * If we arrived here with an override bp, we won't have run
+ * the transform stack, so we won't have the data we need to
+ * generate a child i/o. So, toss the override bp and restart.
+ * This is safe, because using the override bp is just an
+ * optimization; and it's rare, so the cost doesn't matter.
+ */
+ if (zio->io_bp_override) {
+ zio_pop_transforms(zio);
+ zio->io_stage = ZIO_STAGE_OPEN;
+ zio->io_pipeline = ZIO_WRITE_PIPELINE;
+ zio->io_bp_override = NULL;
+ BP_ZERO(bp);
+ ddt_exit(ddt);
+ return (ZIO_PIPELINE_CONTINUE);
+ }
+
+ dio = zio_write(zio, spa, txg, bp, zio->io_orig_data,
+ zio->io_orig_size, &czp, NULL,
+ zio_ddt_ditto_write_done, dde, zio->io_priority,
+ ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark);
+
+ zio_push_transform(dio, zio->io_data, zio->io_size, 0, NULL);
+ dde->dde_lead_zio[DDT_PHYS_DITTO] = dio;
+ }
+
+ if (ddp->ddp_phys_birth != 0 || dde->dde_lead_zio[p] != NULL) {
+ if (ddp->ddp_phys_birth != 0)
+ ddt_bp_fill(ddp, bp, txg);
+ if (dde->dde_lead_zio[p] != NULL)
+ zio_add_child(zio, dde->dde_lead_zio[p]);
+ else
+ ddt_phys_addref(ddp);
+ } else if (zio->io_bp_override) {
+ ASSERT(bp->blk_birth == txg);
+ ASSERT(BP_EQUAL(bp, zio->io_bp_override));
+ ddt_phys_fill(ddp, bp);
+ 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_ddt_child_write_done, dde, zio->io_priority,
+ ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark);
+
+ zio_push_transform(cio, zio->io_data, zio->io_size, 0, NULL);
+ dde->dde_lead_zio[p] = cio;
+ }
+
+ ddt_exit(ddt);
+
+ if (cio)
+ zio_nowait(cio);
+ if (dio)
+ zio_nowait(dio);
+
+ return (ZIO_PIPELINE_CONTINUE);
+}
+
+ddt_entry_t *freedde; /* for debugging */
static int
+zio_ddt_free(zio_t *zio)
+{
+ spa_t *spa = zio->io_spa;
+ blkptr_t *bp = zio->io_bp;
+ ddt_t *ddt = ddt_select(spa, bp);
+ ddt_entry_t *dde;
+ ddt_phys_t *ddp;
+
+ ASSERT(BP_GET_DEDUP(bp));
+ ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
+
+ ddt_enter(ddt);
+ freedde = dde = ddt_lookup(ddt, bp, B_TRUE);
+ ddp = ddt_phys_select(dde, bp);
+ ddt_phys_decref(ddp);
+ ddt_exit(ddt);
+
+ return (ZIO_PIPELINE_CONTINUE);
+}
+
+/*
+ * ==========================================================================
+ * Allocate and free blocks
+ * ==========================================================================
+ */
+static int
zio_dva_allocate(zio_t *zio)
{
spa_t *spa = zio->io_spa;
- metaslab_class_t *mc = spa->spa_normal_class;
+ metaslab_class_t *mc = spa_normal_class(spa);
blkptr_t *bp = zio->io_bp;
int error;
ASSERT(BP_IS_HOLE(bp));
ASSERT3U(BP_GET_NDVAS(bp), ==, 0);
- ASSERT3U(zio->io_prop.zp_ndvas, >, 0);
- ASSERT3U(zio->io_prop.zp_ndvas, <=, spa_max_replication(spa));
+ 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));
error = metaslab_alloc(spa, mc, zio->io_size, bp,
- zio->io_prop.zp_ndvas, zio->io_txg, NULL, 0);
+ zio->io_prop.zp_copies, zio->io_txg, NULL, 0);
if (error) {
if (error == ENOSPC && zio->io_size > SPA_MINBLOCKSIZE)
static void
zio_dva_unallocate(zio_t *zio, zio_gang_node_t *gn, blkptr_t *bp)
{
- spa_t *spa = zio->io_spa;
- boolean_t now = !(zio->io_flags & ZIO_FLAG_IO_REWRITE);
-
ASSERT(bp->blk_birth == zio->io_txg || BP_IS_HOLE(bp));
-
- if (zio->io_bp == bp && !now) {
- /*
- * This is a rewrite for sync-to-convergence.
- * We can't do a metaslab_free(NOW) because bp wasn't allocated
- * during this sync pass, which means that metaslab_sync()
- * already committed the allocation.
- */
- ASSERT(DVA_EQUAL(BP_IDENTITY(bp),
- BP_IDENTITY(&zio->io_bp_orig)));
- ASSERT(spa_sync_pass(spa) > 1);
-
- if (BP_IS_GANG(bp) && gn == NULL) {
- /*
- * This is a gang leader whose gang header(s) we
- * couldn't read now, so defer the free until later.
- * The block should still be intact because without
- * the headers, we'd never even start the rewrite.
- */
- bplist_enqueue_deferred(&spa->spa_sync_bplist, bp);
- return;
- }
- }
+ ASSERT(zio->io_bp_override == NULL);
if (!BP_IS_HOLE(bp))
- metaslab_free(spa, bp, bp->blk_birth, now);
+ metaslab_free(zio->io_spa, bp, bp->blk_birth, B_TRUE);
if (gn != NULL) {
for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) {
* Try to allocate an intent log block. Return 0 on success, errno on failure.
*/
int
-zio_alloc_blk(spa_t *spa, uint64_t size, blkptr_t *new_bp, blkptr_t *old_bp,
- uint64_t txg)
+zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, blkptr_t *old_bp,
+ uint64_t size, boolean_t use_slog)
{
- int error;
+ int error = 1;
- error = metaslab_alloc(spa, spa->spa_log_class, size,
- new_bp, 1, txg, old_bp, METASLAB_HINTBP_AVOID);
+ ASSERT(txg > spa_syncing_txg(spa));
+
+ if (use_slog)
+ error = metaslab_alloc(spa, spa_log_class(spa), size,
+ new_bp, 1, txg, old_bp, METASLAB_HINTBP_AVOID);
if (error)
- error = metaslab_alloc(spa, spa->spa_normal_class, size,
+ error = metaslab_alloc(spa, spa_normal_class(spa), size,
new_bp, 1, txg, old_bp, METASLAB_HINTBP_AVOID);
if (error == 0) {
BP_SET_LSIZE(new_bp, size);
BP_SET_PSIZE(new_bp, size);
BP_SET_COMPRESS(new_bp, ZIO_COMPRESS_OFF);
- BP_SET_CHECKSUM(new_bp, ZIO_CHECKSUM_ZILOG);
+ BP_SET_CHECKSUM(new_bp,
+ spa_version(spa) >= SPA_VERSION_SLIM_ZIL
+ ? ZIO_CHECKSUM_ZILOG2 : ZIO_CHECKSUM_ZILOG);
BP_SET_TYPE(new_bp, DMU_OT_INTENT_LOG);
BP_SET_LEVEL(new_bp, 0);
+ BP_SET_DEDUP(new_bp, 0);
BP_SET_BYTEORDER(new_bp, ZFS_HOST_BYTEORDER);
}
}
/*
- * Free an intent log block. We know it can't be a gang block, so there's
- * nothing to do except metaslab_free() it.
+ * Free an intent log block.
*/
void
-zio_free_blk(spa_t *spa, blkptr_t *bp, uint64_t txg)
+zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp)
{
+ ASSERT(BP_GET_TYPE(bp) == DMU_OT_INTENT_LOG);
ASSERT(!BP_IS_GANG(bp));
- metaslab_free(spa, bp, txg, B_FALSE);
+ zio_free(spa, txg, bp);
}
/*
return (ZIO_PIPELINE_CONTINUE);
}
+/*
+ * For non-raidz ZIOs, we can just copy aside the bad data read from the
+ * disk, and use that to finish the checksum ereport later.
+ */
+static void
+zio_vsd_default_cksum_finish(zio_cksum_report_t *zcr,
+ const void *good_buf)
+{
+ /* no processing needed */
+ zfs_ereport_finish_checksum(zcr, good_buf, zcr->zcr_cbdata, B_FALSE);
+}
+
+/*ARGSUSED*/
+void
+zio_vsd_default_cksum_report(zio_t *zio, zio_cksum_report_t *zcr, void *ignored)
+{
+ void *buf = zio_buf_alloc(zio->io_size);
+
+ bcopy(zio->io_data, buf, zio->io_size);
+
+ zcr->zcr_cbinfo = zio->io_size;
+ zcr->zcr_cbdata = buf;
+ zcr->zcr_finish = zio_vsd_default_cksum_finish;
+ zcr->zcr_free = zio_buf_free;
+}
+
static int
zio_vdev_io_assess(zio_t *zio)
{
spa_config_exit(zio->io_spa, SCL_ZIO, zio);
if (zio->io_vsd != NULL) {
- zio->io_vsd_free(zio);
+ zio->io_vsd_ops->vsd_free(zio);
zio->io_vsd = NULL;
}
/*
* If the I/O failed, determine whether we should attempt to retry it.
+ *
+ * On retry, we cut in line in the issue queue, since we don't want
+ * compression/checksumming/etc. work to prevent our (cheap) IO reissue.
*/
if (zio->io_error && vd == NULL &&
!(zio->io_flags & (ZIO_FLAG_DONT_RETRY | ZIO_FLAG_IO_RETRY))) {
zio->io_error = 0;
zio->io_flags |= ZIO_FLAG_IO_RETRY |
ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE;
- zio->io_stage = ZIO_STAGE_VDEV_IO_START - 1;
- zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE);
+ zio->io_stage = ZIO_STAGE_VDEV_IO_START >> 1;
+ zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE,
+ zio_requeue_io_start_cut_in_line);
return (ZIO_PIPELINE_STOP);
}
ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_START);
ASSERT(zio->io_error == 0);
- zio->io_stage--;
+ zio->io_stage >>= 1;
}
void
{
ASSERT(zio->io_stage == ZIO_STAGE_VDEV_IO_DONE);
- zio->io_stage--;
+ zio->io_stage >>= 1;
}
void
ASSERT(zio->io_error == 0);
zio->io_flags |= ZIO_FLAG_IO_BYPASS;
- zio->io_stage = ZIO_STAGE_VDEV_IO_ASSESS - 1;
+ zio->io_stage = ZIO_STAGE_VDEV_IO_ASSESS >> 1;
}
/*
static int
zio_checksum_verify(zio_t *zio)
{
+ zio_bad_cksum_t info;
blkptr_t *bp = zio->io_bp;
int error;
+ ASSERT(zio->io_vd != NULL);
+
if (bp == NULL) {
/*
* This is zio_read_phys().
ASSERT(zio->io_prop.zp_checksum == ZIO_CHECKSUM_LABEL);
}
- if ((error = zio_checksum_error(zio)) != 0) {
+ if ((error = zio_checksum_error(zio, &info)) != 0) {
zio->io_error = error;
if (!(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
- zfs_ereport_post(FM_EREPORT_ZFS_CHECKSUM,
- zio->io_spa, zio->io_vd, zio, 0, 0);
+ zfs_ereport_start_checksum(zio->io_spa,
+ zio->io_vd, zio, zio->io_offset,
+ zio->io_size, NULL, &info);
}
}
void
zio_checksum_verified(zio_t *zio)
{
- zio->io_pipeline &= ~(1U << ZIO_STAGE_CHECKSUM_VERIFY);
+ zio->io_pipeline &= ~ZIO_STAGE_CHECKSUM_VERIFY;
}
/*
blkptr_t *bp = zio->io_bp;
zio_t *pio, *pio_next;
- if (zio_wait_for_children(zio, ZIO_CHILD_GANG, ZIO_WAIT_READY))
+ if (zio_wait_for_children(zio, ZIO_CHILD_GANG, ZIO_WAIT_READY) ||
+ zio_wait_for_children(zio, ZIO_CHILD_DDT, ZIO_WAIT_READY))
return (ZIO_PIPELINE_STOP);
if (zio->io_ready) {
zio_notify_parent(pio, zio, ZIO_WAIT_READY);
}
+ if (zio->io_flags & ZIO_FLAG_NODATA) {
+ if (BP_IS_GANG(bp)) {
+ zio->io_flags &= ~ZIO_FLAG_NODATA;
+ } else {
+ ASSERT((uintptr_t)zio->io_data < SPA_MAXBLOCKSIZE);
+ zio->io_pipeline &= ~ZIO_VDEV_IO_STAGES;
+ }
+ }
+
+ if (zio_injection_enabled &&
+ zio->io_spa->spa_syncing_txg == zio->io_txg)
+ zio_handle_ignored_writes(zio);
+
return (ZIO_PIPELINE_CONTINUE);
}
*/
if (zio_wait_for_children(zio, ZIO_CHILD_VDEV, ZIO_WAIT_DONE) ||
zio_wait_for_children(zio, ZIO_CHILD_GANG, ZIO_WAIT_DONE) ||
+ zio_wait_for_children(zio, ZIO_CHILD_DDT, ZIO_WAIT_DONE) ||
zio_wait_for_children(zio, ZIO_CHILD_LOGICAL, ZIO_WAIT_DONE))
return (ZIO_PIPELINE_STOP);
if (bp != NULL) {
ASSERT(bp->blk_pad[0] == 0);
ASSERT(bp->blk_pad[1] == 0);
- ASSERT(bp->blk_pad[2] == 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) &&
+ zio->io_bp_override == NULL &&
!(zio->io_flags & ZIO_FLAG_IO_REPAIR)) {
ASSERT(!BP_SHOULD_BYTESWAP(bp));
- ASSERT3U(zio->io_prop.zp_ndvas, <=, BP_GET_NDVAS(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)));
}
}
/*
- * If there were child vdev or gang errors, they apply to us now.
+ * If there were child vdev/gang/ddt errors, they apply to us now.
*/
zio_inherit_child_errors(zio, ZIO_CHILD_VDEV);
zio_inherit_child_errors(zio, ZIO_CHILD_GANG);
+ zio_inherit_child_errors(zio, ZIO_CHILD_DDT);
+
+ /*
+ * If the I/O on the transformed data was successful, generate any
+ * checksum reports now while we still have the transformed data.
+ */
+ if (zio->io_error == 0) {
+ 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);
+ char *abuf = zio->io_data;
+
+ if (asize != psize) {
+ abuf = zio_buf_alloc(asize);
+ bcopy(zio->io_data, abuf, psize);
+ bzero(abuf + psize, asize - psize);
+ }
+
+ zio->io_cksum_report = zcr->zcr_next;
+ zcr->zcr_next = NULL;
+ zcr->zcr_finish(zcr, abuf);
+ zfs_ereport_free_checksum(zcr);
+
+ if (asize != psize)
+ zio_buf_free(abuf, asize);
+ }
+ }
zio_pop_transforms(zio); /* note: may set zio->io_error */
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 == EIO ||
- !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) && zio == lio) {
+ if ((zio->io_error == EIO || !(zio->io_flags &
+ (ZIO_FLAG_SPECULATIVE | ZIO_FLAG_DONT_PROPAGATE))) &&
+ zio == lio) {
/*
* For logical I/O requests, tell the SPA to log the
* error and generate a logical data ereport.
* propagate all the way to the root via zio_notify_parent().
*/
ASSERT(vd == NULL && bp != NULL);
+ ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
- if (IO_IS_ALLOCATING(zio))
+ if (IO_IS_ALLOCATING(zio) &&
+ !(zio->io_flags & ZIO_FLAG_CANFAIL)) {
if (zio->io_error != ENOSPC)
zio->io_reexecute |= ZIO_REEXECUTE_NOW;
else
zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND;
+ }
if ((zio->io_type == ZIO_TYPE_READ ||
zio->io_type == ZIO_TYPE_FREE) &&
zio->io_error == ENXIO &&
- spa->spa_load_state == SPA_LOAD_NONE &&
+ spa_load_state(spa) == SPA_LOAD_NONE &&
spa_get_failmode(spa) != ZIO_FAILURE_MODE_CONTINUE)
zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND;
if (!(zio->io_flags & ZIO_FLAG_CANFAIL) && !zio->io_reexecute)
zio->io_reexecute |= ZIO_REEXECUTE_SUSPEND;
+
+ /*
+ * Here is a possibly good place to attempt to do
+ * either combinatorial reconstruction or error correction
+ * based on checksums. It also might be a good place
+ * to send out preliminary ereports before we suspend
+ * processing.
+ */
}
/*
*/
zio_inherit_child_errors(zio, ZIO_CHILD_LOGICAL);
- if ((zio->io_error || zio->io_reexecute) && IO_IS_ALLOCATING(zio) &&
- zio->io_child_type == ZIO_CHILD_LOGICAL) {
- ASSERT(zio->io_child_type != ZIO_CHILD_GANG);
+ 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_gang_tree_free(&zio->io_gang_tree);
return (ZIO_PIPELINE_STOP);
}
- ASSERT(zio_walk_children(zio) == NULL);
+ ASSERT(zio->io_child_count == 0);
ASSERT(zio->io_reexecute == 0);
ASSERT(zio->io_error == 0 || (zio->io_flags & ZIO_FLAG_CANFAIL));
/*
+ * Report any checksum errors, since the I/O is complete.
+ */
+ while (zio->io_cksum_report != NULL) {
+ zio_cksum_report_t *zcr = zio->io_cksum_report;
+ zio->io_cksum_report = zcr->zcr_next;
+ zcr->zcr_next = NULL;
+ zcr->zcr_finish(zcr, NULL);
+ zfs_ereport_free_checksum(zcr);
+ }
+
+ /*
* It is the responsibility of the done callback to ensure that this
* particular zio is no longer discoverable for adoption, and as
* such, cannot acquire any new parents.
* I/O pipeline definition
* ==========================================================================
*/
-static zio_pipe_stage_t *zio_pipeline[ZIO_STAGES] = {
+static zio_pipe_stage_t *zio_pipeline[] = {
NULL,
- zio_issue_async,
zio_read_bp_init,
+ zio_free_bp_init,
+ zio_issue_async,
zio_write_bp_init,
zio_checksum_generate,
+ zio_ddt_read_start,
+ zio_ddt_read_done,
+ zio_ddt_write,
+ zio_ddt_free,
zio_gang_assemble,
zio_gang_issue,
zio_dva_allocate,
git://git.camperquake.de / zfs.git / blobdiff