*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
+ * Copyright (c) 2011, 2018 by Delphix. All rights reserved.
* Copyright (c) 2011 Nexenta Systems, Inc. All rights reserved.
+ * Copyright (c) 2017, Intel Corporation.
*/
+#include <sys/sysmacros.h>
#include <sys/zfs_context.h>
#include <sys/fm/fs/zfs.h>
#include <sys/spa.h>
#include <sys/txg.h>
#include <sys/spa_impl.h>
#include <sys/vdev_impl.h>
+#include <sys/vdev_trim.h>
#include <sys/zio_impl.h>
#include <sys/zio_compress.h>
#include <sys/zio_checksum.h>
#include <sys/ddt.h>
#include <sys/blkptr.h>
#include <sys/zfeature.h>
+#include <sys/dsl_scan.h>
+#include <sys/metaslab_impl.h>
+#include <sys/time.h>
+#include <sys/trace_zio.h>
+#include <sys/abd.h>
+#include <sys/dsl_crypt.h>
+#include <sys/cityhash.h>
/*
* ==========================================================================
* ==========================================================================
*/
const char *zio_type_name[ZIO_TYPES] = {
- "z_null", "z_rd", "z_wr", "z_fr", "z_cl", "z_ioctl"
+ /*
+ * Note: Linux kernel thread name length is limited
+ * so these names will differ from upstream open zfs.
+ */
+ "z_null", "z_rd", "z_wr", "z_fr", "z_cl", "z_ioctl", "z_trim"
};
+int zio_dva_throttle_enabled = B_TRUE;
+int zio_deadman_log_all = B_FALSE;
+
/*
* ==========================================================================
* I/O kmem caches
*/
kmem_cache_t *zio_cache;
kmem_cache_t *zio_link_cache;
-kmem_cache_t *zio_vdev_cache;
kmem_cache_t *zio_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT];
kmem_cache_t *zio_data_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT];
-int zio_bulk_flags = 0;
-int zio_delay_max = ZIO_DELAY_MAX;
+#if defined(ZFS_DEBUG) && !defined(_KERNEL)
+uint64_t zio_buf_cache_allocs[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT];
+uint64_t zio_buf_cache_frees[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT];
+#endif
+/* Mark IOs as "slow" if they take longer than 30 seconds */
+int zio_slow_io_ms = (30 * MILLISEC);
+
+#define BP_SPANB(indblkshift, level) \
+ (((uint64_t)1) << ((level) * ((indblkshift) - SPA_BLKPTRSHIFT)))
+#define COMPARE_META_LEVEL 0x80000000ul
/*
* 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.
static inline void __zio_execute(zio_t *zio);
-static int
-zio_cons(void *arg, void *unused, int kmflag)
-{
- zio_t *zio = arg;
-
- bzero(zio, sizeof (zio_t));
-
- mutex_init(&zio->io_lock, NULL, MUTEX_DEFAULT, NULL);
- cv_init(&zio->io_cv, NULL, CV_DEFAULT, NULL);
-
- list_create(&zio->io_parent_list, sizeof (zio_link_t),
- offsetof(zio_link_t, zl_parent_node));
- list_create(&zio->io_child_list, sizeof (zio_link_t),
- offsetof(zio_link_t, zl_child_node));
-
- return (0);
-}
-
-static void
-zio_dest(void *arg, void *unused)
-{
- zio_t *zio = arg;
-
- mutex_destroy(&zio->io_lock);
- cv_destroy(&zio->io_cv);
- list_destroy(&zio->io_parent_list);
- list_destroy(&zio->io_child_list);
-}
+static void zio_taskq_dispatch(zio_t *, zio_taskq_type_t, boolean_t);
void
zio_init(void)
size_t c;
vmem_t *data_alloc_arena = NULL;
- zio_cache = kmem_cache_create("zio_cache", sizeof (zio_t), 0,
- zio_cons, zio_dest, NULL, NULL, NULL, 0);
+ 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",
sizeof (zio_link_t), 0, NULL, NULL, NULL, NULL, NULL, 0);
- zio_vdev_cache = kmem_cache_create("zio_vdev_cache", sizeof (vdev_io_t),
- PAGESIZE, NULL, NULL, NULL, NULL, NULL, 0);
/*
* For small buffers, we want a cache for each multiple of
- * SPA_MINBLOCKSIZE. For medium-size buffers, we want a cache
- * for each quarter-power of 2. For large buffers, we want
- * a cache for each multiple of PAGESIZE.
+ * SPA_MINBLOCKSIZE. For larger buffers, we want a cache
+ * for each quarter-power of 2.
*/
for (c = 0; c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; c++) {
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;
+
+#if defined(_ILP32) && defined(_KERNEL)
+ /*
+ * Cache size limited to 1M on 32-bit platforms until ARC
+ * buffers no longer require virtual address space.
+ */
+ if (size > zfs_max_recordsize)
+ break;
+#endif
- while (p2 & (p2 - 1))
+ while (!ISP2(p2))
p2 &= p2 - 1;
#ifndef _KERNEL
*/
if (arc_watch && !IS_P2ALIGNED(size, PAGESIZE))
continue;
-#endif
- if (size <= 4 * SPA_MINBLOCKSIZE) {
+ /*
+ * Here's the problem - on 4K native devices in userland on
+ * Linux using O_DIRECT, buffers must be 4K aligned or I/O
+ * will fail with EINVAL, causing zdb (and others) to coredump.
+ * Since userland probably doesn't need optimized buffer caches,
+ * we just force 4K alignment on everything.
+ */
+ align = 8 * SPA_MINBLOCKSIZE;
+#else
+ if (size < PAGESIZE) {
align = SPA_MINBLOCKSIZE;
- } else if (IS_P2ALIGNED(size, PAGESIZE)) {
- align = PAGESIZE;
} else if (IS_P2ALIGNED(size, p2 >> 2)) {
- align = p2 >> 2;
+ align = PAGESIZE;
}
+#endif
if (align != 0) {
char name[36];
- int flags = zio_bulk_flags;
-
(void) sprintf(name, "zio_buf_%lu", (ulong_t)size);
zio_buf_cache[c] = kmem_cache_create(name, size,
- align, NULL, NULL, NULL, NULL, NULL, flags);
+ 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, flags);
+ data_alloc_arena, cflags);
}
}
kmem_cache_t *last_data_cache = NULL;
for (c = 0; c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; c++) {
+#ifdef _ILP32
+ /*
+ * Cache size limited to 1M on 32-bit platforms until ARC
+ * buffers no longer require virtual address space.
+ */
+ if (((c + 1) << SPA_MINBLOCKSHIFT) > zfs_max_recordsize)
+ break;
+#endif
+#if defined(ZFS_DEBUG) && !defined(_KERNEL)
+ if (zio_buf_cache_allocs[c] != zio_buf_cache_frees[c])
+ (void) printf("zio_fini: [%d] %llu != %llu\n",
+ (int)((c + 1) << SPA_MINBLOCKSHIFT),
+ (long long unsigned)zio_buf_cache_allocs[c],
+ (long long unsigned)zio_buf_cache_frees[c]);
+#endif
if (zio_buf_cache[c] != last_cache) {
last_cache = zio_buf_cache[c];
kmem_cache_destroy(zio_buf_cache[c]);
zio_data_buf_cache[c] = NULL;
}
- kmem_cache_destroy(zio_vdev_cache);
kmem_cache_destroy(zio_link_cache);
kmem_cache_destroy(zio_cache);
{
size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
- ASSERT3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
+ VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
+#if defined(ZFS_DEBUG) && !defined(_KERNEL)
+ atomic_add_64(&zio_buf_cache_allocs[c], 1);
+#endif
- return (kmem_cache_alloc(zio_buf_cache[c], KM_PUSHPAGE | KM_NODEBUG));
+ return (kmem_cache_alloc(zio_buf_cache[c], KM_PUSHPAGE));
}
/*
{
size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
- ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
+ VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
- return (kmem_cache_alloc(zio_data_buf_cache[c],
- KM_PUSHPAGE | KM_NODEBUG));
+ return (kmem_cache_alloc(zio_data_buf_cache[c], KM_PUSHPAGE));
}
void
{
size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
- ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
+ VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
+#if defined(ZFS_DEBUG) && !defined(_KERNEL)
+ atomic_add_64(&zio_buf_cache_frees[c], 1);
+#endif
kmem_cache_free(zio_buf_cache[c], buf);
}
{
size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
- ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
+ VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
kmem_cache_free(zio_data_buf_cache[c], buf);
}
-/*
- * Dedicated I/O buffers to ensure that memory fragmentation never prevents
- * or significantly delays the issuing of a zio. These buffers are used
- * to aggregate I/O and could be used for raidz stripes.
- */
-void *
-zio_vdev_alloc(void)
-{
- return (kmem_cache_alloc(zio_vdev_cache, KM_PUSHPAGE));
-}
-
-void
-zio_vdev_free(void *buf)
+static void
+zio_abd_free(void *abd, size_t size)
{
- kmem_cache_free(zio_vdev_cache, buf);
-
+ abd_free((abd_t *)abd);
}
/*
* Push and pop I/O transform buffers
* ==========================================================================
*/
-static void
-zio_push_transform(zio_t *zio, void *data, uint64_t size, uint64_t bufsize,
- zio_transform_func_t *transform)
+void
+zio_push_transform(zio_t *zio, abd_t *data, uint64_t size, uint64_t bufsize,
+ zio_transform_func_t *transform)
{
- zio_transform_t *zt = kmem_alloc(sizeof (zio_transform_t), KM_PUSHPAGE);
+ zio_transform_t *zt = kmem_alloc(sizeof (zio_transform_t), KM_SLEEP);
+
+ /*
+ * Ensure that anyone expecting this zio to contain a linear ABD isn't
+ * going to get a nasty surprise when they try to access the data.
+ */
+ IMPLY(abd_is_linear(zio->io_abd), abd_is_linear(data));
- zt->zt_orig_data = zio->io_data;
+ zt->zt_orig_abd = zio->io_abd;
zt->zt_orig_size = zio->io_size;
zt->zt_bufsize = bufsize;
zt->zt_transform = transform;
zt->zt_next = zio->io_transform_stack;
zio->io_transform_stack = zt;
- zio->io_data = data;
+ zio->io_abd = data;
zio->io_size = size;
}
-static void
+void
zio_pop_transforms(zio_t *zio)
{
zio_transform_t *zt;
while ((zt = zio->io_transform_stack) != NULL) {
if (zt->zt_transform != NULL)
zt->zt_transform(zio,
- zt->zt_orig_data, zt->zt_orig_size);
+ zt->zt_orig_abd, zt->zt_orig_size);
if (zt->zt_bufsize != 0)
- zio_buf_free(zio->io_data, zt->zt_bufsize);
+ abd_free(zio->io_abd);
- zio->io_data = zt->zt_orig_data;
+ zio->io_abd = zt->zt_orig_abd;
zio->io_size = zt->zt_orig_size;
zio->io_transform_stack = zt->zt_next;
/*
* ==========================================================================
- * I/O transform callbacks for subblocks and decompression
+ * I/O transform callbacks for subblocks, decompression, and decryption
* ==========================================================================
*/
static void
-zio_subblock(zio_t *zio, void *data, uint64_t size)
+zio_subblock(zio_t *zio, abd_t *data, uint64_t size)
{
ASSERT(zio->io_size > size);
if (zio->io_type == ZIO_TYPE_READ)
- bcopy(zio->io_data, data, size);
+ abd_copy(data, zio->io_abd, size);
+}
+
+static void
+zio_decompress(zio_t *zio, abd_t *data, uint64_t size)
+{
+ if (zio->io_error == 0) {
+ void *tmp = abd_borrow_buf(data, size);
+ int ret = zio_decompress_data(BP_GET_COMPRESS(zio->io_bp),
+ zio->io_abd, tmp, zio->io_size, size);
+ abd_return_buf_copy(data, tmp, size);
+
+ if (zio_injection_enabled && ret == 0)
+ ret = zio_handle_fault_injection(zio, EINVAL);
+
+ if (ret != 0)
+ zio->io_error = SET_ERROR(EIO);
+ }
}
static void
-zio_decompress(zio_t *zio, void *data, uint64_t size)
+zio_decrypt(zio_t *zio, abd_t *data, uint64_t size)
{
- if (zio->io_error == 0 &&
- zio_decompress_data(BP_GET_COMPRESS(zio->io_bp),
- zio->io_data, data, zio->io_size, size) != 0)
+ int ret;
+ void *tmp;
+ blkptr_t *bp = zio->io_bp;
+ spa_t *spa = zio->io_spa;
+ uint64_t dsobj = zio->io_bookmark.zb_objset;
+ uint64_t lsize = BP_GET_LSIZE(bp);
+ dmu_object_type_t ot = BP_GET_TYPE(bp);
+ uint8_t salt[ZIO_DATA_SALT_LEN];
+ uint8_t iv[ZIO_DATA_IV_LEN];
+ uint8_t mac[ZIO_DATA_MAC_LEN];
+ boolean_t no_crypt = B_FALSE;
+
+ ASSERT(BP_USES_CRYPT(bp));
+ ASSERT3U(size, !=, 0);
+
+ if (zio->io_error != 0)
+ return;
+
+ /*
+ * Verify the cksum of MACs stored in an indirect bp. It will always
+ * be possible to verify this since it does not require an encryption
+ * key.
+ */
+ if (BP_HAS_INDIRECT_MAC_CKSUM(bp)) {
+ zio_crypt_decode_mac_bp(bp, mac);
+
+ if (BP_GET_COMPRESS(bp) != ZIO_COMPRESS_OFF) {
+ /*
+ * We haven't decompressed the data yet, but
+ * zio_crypt_do_indirect_mac_checksum() requires
+ * decompressed data to be able to parse out the MACs
+ * from the indirect block. We decompress it now and
+ * throw away the result after we are finished.
+ */
+ tmp = zio_buf_alloc(lsize);
+ ret = zio_decompress_data(BP_GET_COMPRESS(bp),
+ zio->io_abd, tmp, zio->io_size, lsize);
+ if (ret != 0) {
+ ret = SET_ERROR(EIO);
+ goto error;
+ }
+ ret = zio_crypt_do_indirect_mac_checksum(B_FALSE,
+ tmp, lsize, BP_SHOULD_BYTESWAP(bp), mac);
+ zio_buf_free(tmp, lsize);
+ } else {
+ ret = zio_crypt_do_indirect_mac_checksum_abd(B_FALSE,
+ zio->io_abd, size, BP_SHOULD_BYTESWAP(bp), mac);
+ }
+ abd_copy(data, zio->io_abd, size);
+
+ if (zio_injection_enabled && ot != DMU_OT_DNODE && ret == 0) {
+ ret = zio_handle_decrypt_injection(spa,
+ &zio->io_bookmark, ot, ECKSUM);
+ }
+ if (ret != 0)
+ goto error;
+
+ return;
+ }
+
+ /*
+ * If this is an authenticated block, just check the MAC. It would be
+ * nice to separate this out into its own flag, but for the moment
+ * enum zio_flag is out of bits.
+ */
+ if (BP_IS_AUTHENTICATED(bp)) {
+ if (ot == DMU_OT_OBJSET) {
+ ret = spa_do_crypt_objset_mac_abd(B_FALSE, spa,
+ dsobj, zio->io_abd, size, BP_SHOULD_BYTESWAP(bp));
+ } else {
+ zio_crypt_decode_mac_bp(bp, mac);
+ ret = spa_do_crypt_mac_abd(B_FALSE, spa, dsobj,
+ zio->io_abd, size, mac);
+ if (zio_injection_enabled && ret == 0) {
+ ret = zio_handle_decrypt_injection(spa,
+ &zio->io_bookmark, ot, ECKSUM);
+ }
+ }
+ abd_copy(data, zio->io_abd, size);
+
+ if (ret != 0)
+ goto error;
+
+ return;
+ }
+
+ zio_crypt_decode_params_bp(bp, salt, iv);
+
+ if (ot == DMU_OT_INTENT_LOG) {
+ tmp = abd_borrow_buf_copy(zio->io_abd, sizeof (zil_chain_t));
+ zio_crypt_decode_mac_zil(tmp, mac);
+ abd_return_buf(zio->io_abd, tmp, sizeof (zil_chain_t));
+ } else {
+ zio_crypt_decode_mac_bp(bp, mac);
+ }
+
+ ret = spa_do_crypt_abd(B_FALSE, spa, &zio->io_bookmark, BP_GET_TYPE(bp),
+ BP_GET_DEDUP(bp), BP_SHOULD_BYTESWAP(bp), salt, iv, mac, size, data,
+ zio->io_abd, &no_crypt);
+ if (no_crypt)
+ abd_copy(data, zio->io_abd, size);
+
+ if (ret != 0)
+ goto error;
+
+ return;
+
+error:
+ /* assert that the key was found unless this was speculative */
+ ASSERT(ret != EACCES || (zio->io_flags & ZIO_FLAG_SPECULATIVE));
+
+ /*
+ * If there was a decryption / authentication error return EIO as
+ * the io_error. If this was not a speculative zio, create an ereport.
+ */
+ if (ret == ECKSUM) {
zio->io_error = SET_ERROR(EIO);
+ if ((zio->io_flags & ZIO_FLAG_SPECULATIVE) == 0) {
+ spa_log_error(spa, &zio->io_bookmark);
+ zfs_ereport_post(FM_EREPORT_ZFS_AUTHENTICATION,
+ spa, NULL, &zio->io_bookmark, zio, 0, 0);
+ }
+ } else {
+ zio->io_error = ret;
+ }
}
/*
* I/O parent/child relationships and pipeline interlocks
* ==========================================================================
*/
-/*
- * NOTE - Callers to zio_walk_parents() and zio_walk_children must
- * continue calling these functions until they return NULL.
- * Otherwise, the next caller will pick up the list walk in
- * some indeterminate state. (Otherwise every caller would
- * have to pass in a cookie to keep the state represented by
- * io_walk_link, which gets annoying.)
- */
zio_t *
-zio_walk_parents(zio_t *cio)
+zio_walk_parents(zio_t *cio, zio_link_t **zl)
{
- zio_link_t *zl = cio->io_walk_link;
list_t *pl = &cio->io_parent_list;
- zl = (zl == NULL) ? list_head(pl) : list_next(pl, zl);
- cio->io_walk_link = zl;
-
- if (zl == NULL)
+ *zl = (*zl == NULL) ? list_head(pl) : list_next(pl, *zl);
+ if (*zl == NULL)
return (NULL);
- ASSERT(zl->zl_child == cio);
- return (zl->zl_parent);
+ ASSERT((*zl)->zl_child == cio);
+ return ((*zl)->zl_parent);
}
zio_t *
-zio_walk_children(zio_t *pio)
+zio_walk_children(zio_t *pio, zio_link_t **zl)
{
- zio_link_t *zl = pio->io_walk_link;
list_t *cl = &pio->io_child_list;
- zl = (zl == NULL) ? list_head(cl) : list_next(cl, zl);
- pio->io_walk_link = zl;
+ ASSERT(MUTEX_HELD(&pio->io_lock));
- if (zl == NULL)
+ *zl = (*zl == NULL) ? list_head(cl) : list_next(cl, *zl);
+ if (*zl == NULL)
return (NULL);
- ASSERT(zl->zl_parent == pio);
- return (zl->zl_child);
+ ASSERT((*zl)->zl_parent == pio);
+ return ((*zl)->zl_child);
}
zio_t *
zio_unique_parent(zio_t *cio)
{
- zio_t *pio = zio_walk_parents(cio);
+ zio_link_t *zl = NULL;
+ zio_t *pio = zio_walk_parents(cio, &zl);
- VERIFY(zio_walk_parents(cio) == NULL);
+ VERIFY3P(zio_walk_parents(cio, &zl), ==, NULL);
return (pio);
}
void
zio_add_child(zio_t *pio, zio_t *cio)
{
- zio_link_t *zl = kmem_cache_alloc(zio_link_cache, KM_PUSHPAGE);
- int w;
+ zio_link_t *zl = kmem_cache_alloc(zio_link_cache, KM_SLEEP);
/*
* Logical I/Os can have logical, gang, or vdev children.
* Vdev I/Os can only have vdev children.
* The following ASSERT captures all of these constraints.
*/
- ASSERT(cio->io_child_type <= pio->io_child_type);
+ ASSERT3S(cio->io_child_type, <=, pio->io_child_type);
zl->zl_parent = pio;
zl->zl_child = cio;
- mutex_enter(&cio->io_lock);
mutex_enter(&pio->io_lock);
+ mutex_enter(&cio->io_lock);
ASSERT(pio->io_state[ZIO_WAIT_DONE] == 0);
- for (w = 0; w < ZIO_WAIT_TYPES; w++)
+ for (int w = 0; w < ZIO_WAIT_TYPES; w++)
pio->io_children[cio->io_child_type][w] += !cio->io_state[w];
list_insert_head(&pio->io_child_list, zl);
pio->io_child_count++;
cio->io_parent_count++;
- mutex_exit(&pio->io_lock);
mutex_exit(&cio->io_lock);
+ mutex_exit(&pio->io_lock);
}
static void
ASSERT(zl->zl_parent == pio);
ASSERT(zl->zl_child == cio);
- mutex_enter(&cio->io_lock);
mutex_enter(&pio->io_lock);
+ mutex_enter(&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_exit(&pio->io_lock);
kmem_cache_free(zio_link_cache, zl);
}
static boolean_t
-zio_wait_for_children(zio_t *zio, enum zio_child child, enum zio_wait_type wait)
+zio_wait_for_children(zio_t *zio, uint8_t childbits, enum zio_wait_type wait)
{
- uint64_t *countp = &zio->io_children[child][wait];
boolean_t waiting = B_FALSE;
mutex_enter(&zio->io_lock);
ASSERT(zio->io_stall == NULL);
- if (*countp != 0) {
- zio->io_stage >>= 1;
- zio->io_stall = countp;
- waiting = B_TRUE;
+ for (int c = 0; c < ZIO_CHILD_TYPES; c++) {
+ if (!(ZIO_CHILD_BIT_IS_SET(childbits, c)))
+ continue;
+
+ uint64_t *countp = &zio->io_children[c][wait];
+ if (*countp != 0) {
+ zio->io_stage >>= 1;
+ ASSERT3U(zio->io_stage, !=, ZIO_STAGE_OPEN);
+ zio->io_stall = countp;
+ waiting = B_TRUE;
+ break;
+ }
}
mutex_exit(&zio->io_lock);
-
return (waiting);
}
__attribute__((always_inline))
static inline void
-zio_notify_parent(zio_t *pio, zio_t *zio, enum zio_wait_type wait)
+zio_notify_parent(zio_t *pio, zio_t *zio, enum zio_wait_type wait,
+ zio_t **next_to_executep)
{
uint64_t *countp = &pio->io_children[zio->io_child_type][wait];
int *errorp = &pio->io_child_error[zio->io_child_type];
(*countp)--;
if (*countp == 0 && pio->io_stall == countp) {
+ zio_taskq_type_t type =
+ pio->io_stage < ZIO_STAGE_VDEV_IO_START ? ZIO_TASKQ_ISSUE :
+ ZIO_TASKQ_INTERRUPT;
pio->io_stall = NULL;
mutex_exit(&pio->io_lock);
- __zio_execute(pio);
+
+ /*
+ * If we can tell the caller to execute this parent next, do
+ * so. Otherwise dispatch the parent zio as its own task.
+ *
+ * Having the caller execute the parent when possible reduces
+ * locking on the zio taskq's, reduces context switch
+ * overhead, and has no recursion penalty. Note that one
+ * read from disk typically causes at least 3 zio's: a
+ * zio_null(), the logical zio_read(), and then a physical
+ * zio. When the physical ZIO completes, we are able to call
+ * zio_done() on all 3 of these zio's from one invocation of
+ * zio_execute() by returning the parent back to
+ * zio_execute(). Since the parent isn't executed until this
+ * thread returns back to zio_execute(), the caller should do
+ * so promptly.
+ *
+ * In other cases, dispatching the parent prevents
+ * overflowing the stack when we have deeply nested
+ * parent-child relationships, as we do with the "mega zio"
+ * of writes for spa_sync(), and the chain of ZIL blocks.
+ */
+ if (next_to_executep != NULL && *next_to_executep == NULL) {
+ *next_to_executep = pio;
+ } else {
+ zio_taskq_dispatch(pio, type, B_FALSE);
+ }
} else {
mutex_exit(&pio->io_lock);
}
zio->io_error = zio->io_child_error[c];
}
+int
+zio_bookmark_compare(const void *x1, const void *x2)
+{
+ const zio_t *z1 = x1;
+ const zio_t *z2 = x2;
+
+ if (z1->io_bookmark.zb_objset < z2->io_bookmark.zb_objset)
+ return (-1);
+ if (z1->io_bookmark.zb_objset > z2->io_bookmark.zb_objset)
+ return (1);
+
+ if (z1->io_bookmark.zb_object < z2->io_bookmark.zb_object)
+ return (-1);
+ if (z1->io_bookmark.zb_object > z2->io_bookmark.zb_object)
+ return (1);
+
+ if (z1->io_bookmark.zb_level < z2->io_bookmark.zb_level)
+ return (-1);
+ if (z1->io_bookmark.zb_level > z2->io_bookmark.zb_level)
+ return (1);
+
+ if (z1->io_bookmark.zb_blkid < z2->io_bookmark.zb_blkid)
+ return (-1);
+ if (z1->io_bookmark.zb_blkid > z2->io_bookmark.zb_blkid)
+ return (1);
+
+ if (z1 < z2)
+ return (-1);
+ if (z1 > z2)
+ return (1);
+
+ return (0);
+}
+
/*
* ==========================================================================
* Create the various types of I/O (read, write, free, etc)
*/
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, 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)
+ abd_t *data, uint64_t lsize, uint64_t psize, zio_done_func_t *done,
+ void *private, 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;
- ASSERT3U(size, <=, SPA_MAXBLOCKSIZE);
- ASSERT(P2PHASE(size, SPA_MINBLOCKSIZE) == 0);
+ IMPLY(type != ZIO_TYPE_TRIM, psize <= SPA_MAXBLOCKSIZE);
+ ASSERT(P2PHASE(psize, SPA_MINBLOCKSIZE) == 0);
ASSERT(P2PHASE(offset, SPA_MINBLOCKSIZE) == 0);
ASSERT(!vd || spa_config_held(spa, SCL_STATE_ALL, RW_READER));
ASSERT(!bp || !(flags & ZIO_FLAG_CONFIG_WRITER));
ASSERT(vd || stage == ZIO_STAGE_OPEN);
- zio = kmem_cache_alloc(zio_cache, KM_PUSHPAGE);
+ IMPLY(lsize != psize, (flags & ZIO_FLAG_RAW_COMPRESS) != 0);
+
+ zio = kmem_cache_alloc(zio_cache, KM_SLEEP);
+ bzero(zio, sizeof (zio_t));
+
+ mutex_init(&zio->io_lock, NULL, MUTEX_NOLOCKDEP, NULL);
+ cv_init(&zio->io_cv, NULL, CV_DEFAULT, NULL);
+
+ list_create(&zio->io_parent_list, sizeof (zio_link_t),
+ offsetof(zio_link_t, zl_parent_node));
+ list_create(&zio->io_child_list, sizeof (zio_link_t),
+ offsetof(zio_link_t, zl_child_node));
+ metaslab_trace_init(&zio->io_alloc_list);
if (vd != NULL)
zio->io_child_type = ZIO_CHILD_VDEV;
zio->io_child_type = ZIO_CHILD_LOGICAL;
if (bp != NULL) {
- zio->io_logical = NULL;
zio->io_bp = (blkptr_t *)bp;
zio->io_bp_copy = *bp;
zio->io_bp_orig = *bp;
zio->io_logical = zio;
if (zio->io_child_type > ZIO_CHILD_GANG && BP_IS_GANG(bp))
pipeline |= ZIO_GANG_STAGES;
- } else {
- zio->io_logical = NULL;
- zio->io_bp = NULL;
- bzero(&zio->io_bp_copy, sizeof (blkptr_t));
- bzero(&zio->io_bp_orig, sizeof (blkptr_t));
}
zio->io_spa = spa;
zio->io_txg = txg;
- zio->io_ready = NULL;
- zio->io_physdone = NULL;
zio->io_done = done;
zio->io_private = private;
- zio->io_prev_space_delta = 0;
zio->io_type = type;
zio->io_priority = priority;
zio->io_vd = vd;
- zio->io_vsd = NULL;
- zio->io_vsd_ops = NULL;
zio->io_offset = offset;
- zio->io_timestamp = 0;
- zio->io_delta = 0;
- zio->io_delay = 0;
- zio->io_orig_data = zio->io_data = data;
- zio->io_orig_size = zio->io_size = size;
+ zio->io_orig_abd = zio->io_abd = data;
+ zio->io_orig_size = zio->io_size = psize;
+ zio->io_lsize = lsize;
zio->io_orig_flags = zio->io_flags = flags;
zio->io_orig_stage = zio->io_stage = stage;
zio->io_orig_pipeline = zio->io_pipeline = pipeline;
- bzero(&zio->io_prop, sizeof (zio_prop_t));
- zio->io_cmd = 0;
- zio->io_reexecute = 0;
- zio->io_bp_override = NULL;
- zio->io_walk_link = NULL;
- zio->io_transform_stack = NULL;
- zio->io_error = 0;
- zio->io_child_count = 0;
- zio->io_phys_children = 0;
- zio->io_parent_count = 0;
- zio->io_stall = NULL;
- zio->io_gang_leader = NULL;
- zio->io_gang_tree = NULL;
- zio->io_executor = NULL;
- zio->io_waiter = NULL;
- zio->io_cksum_report = NULL;
- zio->io_ena = 0;
- bzero(zio->io_child_error, sizeof (int) * ZIO_CHILD_TYPES);
- bzero(zio->io_children,
- sizeof (uint64_t) * ZIO_CHILD_TYPES * ZIO_WAIT_TYPES);
- bzero(&zio->io_bookmark, sizeof (zbookmark_phys_t));
+ zio->io_pipeline_trace = ZIO_STAGE_OPEN;
zio->io_state[ZIO_WAIT_READY] = (stage >= ZIO_STAGE_READY);
zio->io_state[ZIO_WAIT_DONE] = (stage >= ZIO_STAGE_DONE);
zio->io_bookmark = *zb;
if (pio != NULL) {
+ if (zio->io_metaslab_class == NULL)
+ zio->io_metaslab_class = pio->io_metaslab_class;
if (zio->io_logical == NULL)
zio->io_logical = pio->io_logical;
if (zio->io_child_type == ZIO_CHILD_GANG)
static void
zio_destroy(zio_t *zio)
{
+ metaslab_trace_fini(&zio->io_alloc_list);
+ list_destroy(&zio->io_parent_list);
+ list_destroy(&zio->io_child_list);
+ mutex_destroy(&zio->io_lock);
+ cv_destroy(&zio->io_cv);
kmem_cache_free(zio_cache, zio);
}
{
zio_t *zio;
- zio = zio_create(pio, spa, 0, NULL, NULL, 0, done, private,
+ zio = zio_create(pio, spa, 0, NULL, NULL, 0, 0, done, private,
ZIO_TYPE_NULL, ZIO_PRIORITY_NOW, flags, vd, 0, NULL,
ZIO_STAGE_OPEN, ZIO_INTERLOCK_PIPELINE);
return (zio_null(NULL, spa, NULL, done, private, flags));
}
+void
+zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp)
+{
+ if (!DMU_OT_IS_VALID(BP_GET_TYPE(bp))) {
+ zfs_panic_recover("blkptr at %p has invalid TYPE %llu",
+ bp, (longlong_t)BP_GET_TYPE(bp));
+ }
+ if (BP_GET_CHECKSUM(bp) >= ZIO_CHECKSUM_FUNCTIONS ||
+ BP_GET_CHECKSUM(bp) <= ZIO_CHECKSUM_ON) {
+ zfs_panic_recover("blkptr at %p has invalid CHECKSUM %llu",
+ bp, (longlong_t)BP_GET_CHECKSUM(bp));
+ }
+ if (BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_FUNCTIONS ||
+ BP_GET_COMPRESS(bp) <= ZIO_COMPRESS_ON) {
+ zfs_panic_recover("blkptr at %p has invalid COMPRESS %llu",
+ bp, (longlong_t)BP_GET_COMPRESS(bp));
+ }
+ if (BP_GET_LSIZE(bp) > SPA_MAXBLOCKSIZE) {
+ zfs_panic_recover("blkptr at %p has invalid LSIZE %llu",
+ bp, (longlong_t)BP_GET_LSIZE(bp));
+ }
+ if (BP_GET_PSIZE(bp) > SPA_MAXBLOCKSIZE) {
+ zfs_panic_recover("blkptr at %p has invalid PSIZE %llu",
+ bp, (longlong_t)BP_GET_PSIZE(bp));
+ }
+
+ if (BP_IS_EMBEDDED(bp)) {
+ if (BPE_GET_ETYPE(bp) > NUM_BP_EMBEDDED_TYPES) {
+ zfs_panic_recover("blkptr at %p has invalid ETYPE %llu",
+ bp, (longlong_t)BPE_GET_ETYPE(bp));
+ }
+ }
+
+ /*
+ * Do not verify individual DVAs if the config is not trusted. This
+ * will be done once the zio is executed in vdev_mirror_map_alloc.
+ */
+ if (!spa->spa_trust_config)
+ return;
+
+ /*
+ * Pool-specific checks.
+ *
+ * Note: it would be nice to verify that the blk_birth and
+ * BP_PHYSICAL_BIRTH() are not too large. However, spa_freeze()
+ * allows the birth time of log blocks (and dmu_sync()-ed blocks
+ * that are in the log) to be arbitrarily large.
+ */
+ for (int i = 0; i < BP_GET_NDVAS(bp); i++) {
+ uint64_t vdevid = DVA_GET_VDEV(&bp->blk_dva[i]);
+
+ if (vdevid >= spa->spa_root_vdev->vdev_children) {
+ zfs_panic_recover("blkptr at %p DVA %u has invalid "
+ "VDEV %llu",
+ bp, i, (longlong_t)vdevid);
+ continue;
+ }
+ vdev_t *vd = spa->spa_root_vdev->vdev_child[vdevid];
+ if (vd == NULL) {
+ zfs_panic_recover("blkptr at %p DVA %u has invalid "
+ "VDEV %llu",
+ bp, i, (longlong_t)vdevid);
+ continue;
+ }
+ if (vd->vdev_ops == &vdev_hole_ops) {
+ zfs_panic_recover("blkptr at %p DVA %u has hole "
+ "VDEV %llu",
+ bp, i, (longlong_t)vdevid);
+ continue;
+ }
+ if (vd->vdev_ops == &vdev_missing_ops) {
+ /*
+ * "missing" vdevs are valid during import, but we
+ * don't have their detailed info (e.g. asize), so
+ * we can't perform any more checks on them.
+ */
+ continue;
+ }
+ uint64_t offset = DVA_GET_OFFSET(&bp->blk_dva[i]);
+ uint64_t asize = DVA_GET_ASIZE(&bp->blk_dva[i]);
+ if (BP_IS_GANG(bp))
+ asize = vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE);
+ if (offset + asize > vd->vdev_asize) {
+ zfs_panic_recover("blkptr at %p DVA %u has invalid "
+ "OFFSET %llu",
+ bp, i, (longlong_t)offset);
+ }
+ }
+}
+
+boolean_t
+zfs_dva_valid(spa_t *spa, const dva_t *dva, const blkptr_t *bp)
+{
+ uint64_t vdevid = DVA_GET_VDEV(dva);
+
+ if (vdevid >= spa->spa_root_vdev->vdev_children)
+ return (B_FALSE);
+
+ vdev_t *vd = spa->spa_root_vdev->vdev_child[vdevid];
+ if (vd == NULL)
+ return (B_FALSE);
+
+ if (vd->vdev_ops == &vdev_hole_ops)
+ return (B_FALSE);
+
+ if (vd->vdev_ops == &vdev_missing_ops) {
+ return (B_FALSE);
+ }
+
+ uint64_t offset = DVA_GET_OFFSET(dva);
+ uint64_t asize = DVA_GET_ASIZE(dva);
+
+ if (BP_IS_GANG(bp))
+ asize = vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE);
+ if (offset + asize > vd->vdev_asize)
+ return (B_FALSE);
+
+ return (B_TRUE);
+}
+
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,
+ abd_t *data, uint64_t size, zio_done_func_t *done, void *private,
zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb)
{
zio_t *zio;
+ zfs_blkptr_verify(spa, bp);
+
zio = zio_create(pio, spa, BP_PHYSICAL_BIRTH(bp), bp,
- data, size, done, private,
+ data, size, size, done, private,
ZIO_TYPE_READ, priority, flags, NULL, 0, zb,
ZIO_STAGE_OPEN, (flags & ZIO_FLAG_DDT_CHILD) ?
ZIO_DDT_CHILD_READ_PIPELINE : ZIO_READ_PIPELINE);
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 *physdone, zio_done_func_t *done,
- void *private,
- zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb)
+ abd_t *data, uint64_t lsize, uint64_t psize, const zio_prop_t *zp,
+ zio_done_func_t *ready, zio_done_func_t *children_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_copies > 0 &&
zp->zp_copies <= spa_max_replication(spa));
- zio = zio_create(pio, spa, txg, bp, data, size, done, private,
+ zio = zio_create(pio, spa, txg, bp, data, lsize, psize, done, private,
ZIO_TYPE_WRITE, priority, flags, NULL, 0, zb,
ZIO_STAGE_OPEN, (flags & ZIO_FLAG_DDT_CHILD) ?
ZIO_DDT_CHILD_WRITE_PIPELINE : ZIO_WRITE_PIPELINE);
zio->io_ready = ready;
+ zio->io_children_ready = children_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).
+ * dedup (just take the already-allocated BP verbatim). Encrypted
+ * dedup blocks need data as well so we also disable dedup in this
+ * case.
*/
- if (data == NULL && zio->io_prop.zp_dedup_verify) {
+ if (data == NULL &&
+ (zio->io_prop.zp_dedup_verify || zio->io_prop.zp_encrypt)) {
zio->io_prop.zp_dedup = zio->io_prop.zp_dedup_verify = B_FALSE;
}
}
zio_t *
-zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, void *data,
+zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, abd_t *data,
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;
- zio = zio_create(pio, spa, txg, bp, data, size, done, private,
- ZIO_TYPE_WRITE, priority, flags, NULL, 0, zb,
+ zio = zio_create(pio, spa, txg, bp, data, size, size, done, private,
+ ZIO_TYPE_WRITE, priority, flags | ZIO_FLAG_IO_REWRITE, NULL, 0, zb,
ZIO_STAGE_OPEN, ZIO_REWRITE_PIPELINE);
return (zio);
zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp)
{
+ zfs_blkptr_verify(spa, bp);
+
/*
* The check for EMBEDDED is a performance optimization. We
* process the free here (by ignoring it) rather than
metaslab_check_free(spa, bp);
arc_freed(spa, bp);
+ dsl_scan_freed(spa, bp);
/*
* GANG and DEDUP blocks can induce a read (for the gang block header,
stage |= ZIO_STAGE_ISSUE_ASYNC;
zio = zio_create(pio, spa, txg, bp, NULL, BP_GET_PSIZE(bp),
- NULL, NULL, ZIO_TYPE_FREE, ZIO_PRIORITY_NOW, flags,
- NULL, 0, NULL, ZIO_STAGE_OPEN, stage);
+ BP_GET_PSIZE(bp), 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);
+ zfs_blkptr_verify(spa, bp);
if (BP_IS_EMBEDDED(bp))
return (zio_null(pio, spa, NULL, NULL, NULL, 0));
* 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));
- ASSERT(txg == spa_first_txg(spa) || txg == 0);
+ ASSERT3U(spa->spa_uberblock.ub_rootbp.blk_birth, <,
+ spa_min_claim_txg(spa));
+ ASSERT(txg == spa_min_claim_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,
- NULL, 0, NULL, ZIO_STAGE_OPEN, ZIO_CLAIM_PIPELINE);
+ BP_GET_PSIZE(bp), done, private, ZIO_TYPE_CLAIM, ZIO_PRIORITY_NOW,
+ flags, NULL, 0, NULL, ZIO_STAGE_OPEN, ZIO_CLAIM_PIPELINE);
+ ASSERT0(zio->io_queued_timestamp);
return (zio);
}
int c;
if (vd->vdev_children == 0) {
- zio = zio_create(pio, spa, 0, NULL, NULL, 0, done, private,
+ zio = zio_create(pio, spa, 0, NULL, NULL, 0, 0, done, private,
ZIO_TYPE_IOCTL, ZIO_PRIORITY_NOW, flags, vd, 0, NULL,
ZIO_STAGE_OPEN, ZIO_IOCTL_PIPELINE);
return (zio);
}
+zio_t *
+zio_trim(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size,
+ zio_done_func_t *done, void *private, zio_priority_t priority,
+ enum zio_flag flags, enum trim_flag trim_flags)
+{
+ zio_t *zio;
+
+ ASSERT0(vd->vdev_children);
+ ASSERT0(P2PHASE(offset, 1ULL << vd->vdev_ashift));
+ ASSERT0(P2PHASE(size, 1ULL << vd->vdev_ashift));
+ ASSERT3U(size, !=, 0);
+
+ zio = zio_create(pio, vd->vdev_spa, 0, NULL, NULL, size, size, done,
+ private, ZIO_TYPE_TRIM, priority, flags | ZIO_FLAG_PHYSICAL,
+ vd, offset, NULL, ZIO_STAGE_OPEN, ZIO_TRIM_PIPELINE);
+ zio->io_trim_flags = trim_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,
+ abd_t *data, int checksum, zio_done_func_t *done, void *private,
zio_priority_t priority, enum zio_flag flags, boolean_t labels)
{
zio_t *zio;
offset >= vd->vdev_psize - VDEV_LABEL_END_SIZE);
ASSERT3U(offset + size, <=, vd->vdev_psize);
- zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, done, private,
- ZIO_TYPE_READ, priority, flags | ZIO_FLAG_PHYSICAL, vd, offset,
- NULL, ZIO_STAGE_OPEN, ZIO_READ_PHYS_PIPELINE);
+ zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, size, done,
+ private, 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,
+ abd_t *data, int checksum, zio_done_func_t *done, void *private,
zio_priority_t priority, enum zio_flag flags, boolean_t labels)
{
zio_t *zio;
offset >= vd->vdev_psize - VDEV_LABEL_END_SIZE);
ASSERT3U(offset + size, <=, vd->vdev_psize);
- zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, done, private,
- ZIO_TYPE_WRITE, priority, flags | ZIO_FLAG_PHYSICAL, vd, offset,
- NULL, ZIO_STAGE_OPEN, ZIO_WRITE_PHYS_PIPELINE);
+ zio = zio_create(pio, vd->vdev_spa, 0, NULL, data, size, size, done,
+ private, ZIO_TYPE_WRITE, priority, flags | ZIO_FLAG_PHYSICAL, vd,
+ offset, NULL, ZIO_STAGE_OPEN, ZIO_WRITE_PHYS_PIPELINE);
zio->io_prop.zp_checksum = checksum;
- if (zio_checksum_table[checksum].ci_eck) {
+ if (zio_checksum_table[checksum].ci_flags & ZCHECKSUM_FLAG_EMBEDDED) {
/*
* 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.
*/
- void *wbuf = zio_buf_alloc(size);
- bcopy(data, wbuf, size);
+ abd_t *wbuf = abd_alloc_sametype(data, size);
+ abd_copy(wbuf, data, size);
+
zio_push_transform(zio, wbuf, size, size, NULL);
}
*/
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, zio_priority_t priority,
- enum zio_flag flags, zio_done_func_t *done, void *private)
+ abd_t *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;
- ASSERT(vd->vdev_parent ==
- (pio->io_vd ? pio->io_vd : pio->io_spa->spa_root_vdev));
+ /*
+ * vdev child I/Os do not propagate their error to the parent.
+ * Therefore, for correct operation the caller *must* check for
+ * and handle the error in the child i/o's done callback.
+ * The only exceptions are i/os that we don't care about
+ * (OPTIONAL or REPAIR).
+ */
+ ASSERT((flags & ZIO_FLAG_OPTIONAL) || (flags & ZIO_FLAG_IO_REPAIR) ||
+ done != NULL);
if (type == ZIO_TYPE_READ && bp != NULL) {
/*
pio->io_pipeline &= ~ZIO_STAGE_CHECKSUM_VERIFY;
}
- if (vd->vdev_children == 0)
+ if (vd->vdev_ops->vdev_op_leaf) {
+ ASSERT0(vd->vdev_children);
offset += VDEV_LABEL_START_SIZE;
+ }
- flags |= ZIO_VDEV_CHILD_FLAGS(pio) | ZIO_FLAG_DONT_PROPAGATE;
+ flags |= ZIO_VDEV_CHILD_FLAGS(pio);
/*
* If we've decided to do a repair, the write is not speculative --
if (flags & ZIO_FLAG_IO_REPAIR)
flags &= ~ZIO_FLAG_SPECULATIVE;
- zio = zio_create(pio, pio->io_spa, pio->io_txg, bp, data, size,
+ /*
+ * If we're creating a child I/O that is not associated with a
+ * top-level vdev, then the child zio is not an allocating I/O.
+ * If this is a retried I/O then we ignore it since we will
+ * have already processed the original allocating I/O.
+ */
+ if (flags & ZIO_FLAG_IO_ALLOCATING &&
+ (vd != vd->vdev_top || (flags & ZIO_FLAG_IO_RETRY))) {
+ ASSERT(pio->io_metaslab_class != NULL);
+ ASSERT(pio->io_metaslab_class->mc_alloc_throttle_enabled);
+ ASSERT(type == ZIO_TYPE_WRITE);
+ ASSERT(priority == ZIO_PRIORITY_ASYNC_WRITE);
+ ASSERT(!(flags & ZIO_FLAG_IO_REPAIR));
+ ASSERT(!(pio->io_flags & ZIO_FLAG_IO_REWRITE) ||
+ pio->io_child_type == ZIO_CHILD_GANG);
+
+ flags &= ~ZIO_FLAG_IO_ALLOCATING;
+ }
+
+
+ zio = zio_create(pio, pio->io_spa, pio->io_txg, bp, data, size, size,
done, private, type, priority, flags, vd, offset, &pio->io_bookmark,
ZIO_STAGE_VDEV_IO_START >> 1, pipeline);
+ ASSERT3U(zio->io_child_type, ==, ZIO_CHILD_VDEV);
zio->io_physdone = pio->io_physdone;
if (vd->vdev_ops->vdev_op_leaf && zio->io_logical != NULL)
}
zio_t *
-zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, void *data, uint64_t size,
- int type, zio_priority_t priority, enum zio_flag flags,
- zio_done_func_t *done, void *private)
+zio_vdev_delegated_io(vdev_t *vd, uint64_t offset, abd_t *data, uint64_t size,
+ zio_type_t type, zio_priority_t priority, enum zio_flag flags,
+ zio_done_func_t *done, void *private)
{
zio_t *zio;
ASSERT(vd->vdev_ops->vdev_op_leaf);
zio = zio_create(NULL, vd->vdev_spa, 0, NULL,
- data, size, done, private, type, priority,
+ data, size, size, done, private, type, priority,
flags | ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_RETRY | ZIO_FLAG_DELEGATED,
vd, offset, NULL,
ZIO_STAGE_VDEV_IO_START >> 1, ZIO_VDEV_CHILD_PIPELINE);
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);
+ ASSERT3P(zio->io_executor, ==, NULL);
+ ASSERT3U(zio->io_orig_size, ==, zio->io_size);
+ ASSERT3U(size, <=, zio->io_size);
/*
* We don't shrink for raidz because of problems with the
* 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;
+ if (!BP_IS_RAIDZ(zio->io_bp)) {
+ /* we are not doing a raw write */
+ ASSERT3U(zio->io_size, ==, zio->io_lsize);
+ zio->io_orig_size = zio->io_size = zio->io_lsize = size;
+ }
}
/*
* ==========================================================================
*/
-static int
+static zio_t *
zio_read_bp_init(zio_t *zio)
{
blkptr_t *bp = zio->io_bp;
+ uint64_t psize =
+ BP_IS_EMBEDDED(bp) ? BPE_GET_PSIZE(bp) : BP_GET_PSIZE(bp);
+
+ ASSERT3P(zio->io_bp, ==, &zio->io_bp_copy);
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_IS_EMBEDDED(bp) ? BPE_GET_PSIZE(bp) : BP_GET_PSIZE(bp);
- void *cbuf = zio_buf_alloc(psize);
+ !(zio->io_flags & ZIO_FLAG_RAW_COMPRESS)) {
+ zio_push_transform(zio, abd_alloc_sametype(zio->io_abd, psize),
+ psize, psize, zio_decompress);
+ }
- zio_push_transform(zio, cbuf, psize, psize, zio_decompress);
+ if (((BP_IS_PROTECTED(bp) && !(zio->io_flags & ZIO_FLAG_RAW_ENCRYPT)) ||
+ BP_HAS_INDIRECT_MAC_CKSUM(bp)) &&
+ zio->io_child_type == ZIO_CHILD_LOGICAL) {
+ zio_push_transform(zio, abd_alloc_sametype(zio->io_abd, psize),
+ psize, psize, zio_decrypt);
}
if (BP_IS_EMBEDDED(bp) && BPE_GET_ETYPE(bp) == BP_EMBEDDED_TYPE_DATA) {
+ int psize = BPE_GET_PSIZE(bp);
+ void *data = abd_borrow_buf(zio->io_abd, psize);
+
zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
- decode_embedded_bp_compressed(bp, zio->io_data);
+ decode_embedded_bp_compressed(bp, data);
+ abd_return_buf_copy(zio->io_abd, data, psize);
} else {
ASSERT(!BP_IS_EMBEDDED(bp));
+ ASSERT3P(zio->io_bp, ==, &zio->io_bp_copy);
}
if (!DMU_OT_IS_METADATA(BP_GET_TYPE(bp)) && BP_GET_LEVEL(bp) == 0)
if (BP_GET_DEDUP(bp) && zio->io_child_type == ZIO_CHILD_LOGICAL)
zio->io_pipeline = ZIO_DDT_READ_PIPELINE;
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
-static int
+static zio_t *
zio_write_bp_init(zio_t *zio)
{
- spa_t *spa = zio->io_spa;
- zio_prop_t *zp = &zio->io_prop;
- enum zio_compress compress = zp->zp_compress;
- blkptr_t *bp = zio->io_bp;
- uint64_t lsize = zio->io_size;
- uint64_t psize = lsize;
- int pass = 1;
-
- /*
- * If our children haven't all reached the ready stage,
- * wait for them and then repeat this pipeline stage.
- */
- if (zio_wait_for_children(zio, ZIO_CHILD_GANG, ZIO_WAIT_READY) ||
- zio_wait_for_children(zio, ZIO_CHILD_LOGICAL, ZIO_WAIT_READY))
- return (ZIO_PIPELINE_STOP);
-
if (!IO_IS_ALLOCATING(zio))
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
ASSERT(zio->io_child_type != ZIO_CHILD_DDT);
if (zio->io_bp_override) {
+ blkptr_t *bp = zio->io_bp;
+ zio_prop_t *zp = &zio->io_prop;
+
ASSERT(bp->blk_birth != zio->io_txg);
ASSERT(BP_GET_DEDUP(zio->io_bp_override) == 0);
zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
if (BP_IS_EMBEDDED(bp))
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
/*
* If we've been overridden and nopwrite is set then
*/
if (!BP_IS_HOLE(bp) && zp->zp_nopwrite) {
ASSERT(!zp->zp_dedup);
+ ASSERT3U(BP_GET_CHECKSUM(bp), ==, zp->zp_checksum);
zio->io_flags |= ZIO_FLAG_NOPWRITE;
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
ASSERT(!zp->zp_nopwrite);
if (BP_IS_HOLE(bp) || !zp->zp_dedup)
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
- ASSERT(zio_checksum_table[zp->zp_checksum].ci_dedup ||
- zp->zp_dedup_verify);
+ ASSERT((zio_checksum_table[zp->zp_checksum].ci_flags &
+ ZCHECKSUM_FLAG_DEDUP) || zp->zp_dedup_verify);
- if (BP_GET_CHECKSUM(bp) == zp->zp_checksum) {
+ if (BP_GET_CHECKSUM(bp) == zp->zp_checksum &&
+ !zp->zp_encrypt) {
BP_SET_DEDUP(bp, 1);
zio->io_pipeline |= ZIO_STAGE_DDT_WRITE;
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
- zio->io_bp_override = NULL;
- BP_ZERO(bp);
- }
+
+ /*
+ * We were unable to handle this as an override bp, treat
+ * it as a regular write I/O.
+ */
+ zio->io_bp_override = NULL;
+ *bp = zio->io_bp_orig;
+ zio->io_pipeline = zio->io_orig_pipeline;
+ }
+
+ return (zio);
+}
+
+static zio_t *
+zio_write_compress(zio_t *zio)
+{
+ spa_t *spa = zio->io_spa;
+ zio_prop_t *zp = &zio->io_prop;
+ enum zio_compress compress = zp->zp_compress;
+ blkptr_t *bp = zio->io_bp;
+ uint64_t lsize = zio->io_lsize;
+ uint64_t psize = zio->io_size;
+ int pass = 1;
+
+ /*
+ * If our children haven't all reached the ready stage,
+ * wait for them and then repeat this pipeline stage.
+ */
+ if (zio_wait_for_children(zio, ZIO_CHILD_LOGICAL_BIT |
+ ZIO_CHILD_GANG_BIT, ZIO_WAIT_READY)) {
+ return (NULL);
+ }
+
+ if (!IO_IS_ALLOCATING(zio))
+ return (zio);
+
+ if (zio->io_children_ready != NULL) {
+ /*
+ * Now that all our children are ready, run the callback
+ * associated with this zio in case it wants to modify the
+ * data to be written.
+ */
+ ASSERT3U(zp->zp_level, >, 0);
+ zio->io_children_ready(zio);
+ }
+
+ ASSERT(zio->io_child_type != ZIO_CHILD_DDT);
+ ASSERT(zio->io_bp_override == NULL);
if (!BP_IS_HOLE(bp) && bp->blk_birth == zio->io_txg) {
/*
spa_max_replication(spa)) == BP_GET_NDVAS(bp));
}
- if (compress != ZIO_COMPRESS_OFF) {
+ /* If it's a compressed write that is not raw, compress the buffer. */
+ if (compress != ZIO_COMPRESS_OFF &&
+ !(zio->io_flags & ZIO_FLAG_RAW_COMPRESS)) {
void *cbuf = zio_buf_alloc(lsize);
- psize = zio_compress_data(compress, zio->io_data, cbuf, lsize);
+ psize = zio_compress_data(compress, zio->io_abd, cbuf, lsize);
if (psize == 0 || psize == lsize) {
compress = ZIO_COMPRESS_OFF;
zio_buf_free(cbuf, lsize);
- } else if (!zp->zp_dedup && psize <= BPE_PAYLOAD_SIZE &&
+ } else if (!zp->zp_dedup && !zp->zp_encrypt &&
+ 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,
zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
ASSERT(spa_feature_is_active(spa,
SPA_FEATURE_EMBEDDED_DATA));
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
} else {
/*
- * Round up compressed size to MINBLOCKSIZE and
- * zero the tail.
+ * Round up compressed size up to the ashift
+ * of the smallest-ashift device, and zero the tail.
+ * This ensures that the compressed size of the BP
+ * (and thus compressratio property) are correct,
+ * in that we charge for the padding used to fill out
+ * the last sector.
*/
- size_t rounded =
- P2ROUNDUP(psize, (size_t)SPA_MINBLOCKSIZE);
- if (rounded > psize) {
- bzero((char *)cbuf + psize, rounded - psize);
- psize = rounded;
- }
- if (psize == lsize) {
+ ASSERT3U(spa->spa_min_ashift, >=, SPA_MINBLOCKSHIFT);
+ size_t rounded = (size_t)P2ROUNDUP(psize,
+ 1ULL << spa->spa_min_ashift);
+ if (rounded >= lsize) {
compress = ZIO_COMPRESS_OFF;
zio_buf_free(cbuf, lsize);
+ psize = lsize;
} else {
- zio_push_transform(zio, cbuf,
+ abd_t *cdata = abd_get_from_buf(cbuf, lsize);
+ abd_take_ownership_of_buf(cdata, B_TRUE);
+ abd_zero_off(cdata, psize, rounded - psize);
+ psize = rounded;
+ zio_push_transform(zio, cdata,
psize, lsize, NULL);
}
}
+
+ /*
+ * We were unable to handle this as an override bp, treat
+ * it as a regular write I/O.
+ */
+ zio->io_bp_override = NULL;
+ *bp = zio->io_bp_orig;
+ zio->io_pipeline = zio->io_orig_pipeline;
+
+ } else if ((zio->io_flags & ZIO_FLAG_RAW_ENCRYPT) != 0 &&
+ zp->zp_type == DMU_OT_DNODE) {
+ /*
+ * The DMU actually relies on the zio layer's compression
+ * to free metadnode blocks that have had all contained
+ * dnodes freed. As a result, even when doing a raw
+ * receive, we must check whether the block can be compressed
+ * to a hole.
+ */
+ psize = zio_compress_data(ZIO_COMPRESS_EMPTY,
+ zio->io_abd, NULL, lsize);
+ if (psize == 0)
+ compress = ZIO_COMPRESS_OFF;
+ } else {
+ ASSERT3U(psize, !=, 0);
}
/*
if (!BP_IS_HOLE(bp) && bp->blk_birth == zio->io_txg &&
BP_GET_PSIZE(bp) == psize &&
pass >= zfs_sync_pass_rewrite) {
+ VERIFY3U(psize, !=, 0);
enum zio_stage gang_stages = zio->io_pipeline & ZIO_GANG_STAGES;
- ASSERT(psize != 0);
+
zio->io_pipeline = ZIO_REWRITE_PIPELINE | gang_stages;
zio->io_flags |= ZIO_FLAG_IO_REWRITE;
} else {
if (zp->zp_dedup) {
ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REWRITE));
+ ASSERT(!zp->zp_encrypt ||
+ DMU_OT_IS_ENCRYPTED(zp->zp_type));
zio->io_pipeline = ZIO_DDT_WRITE_PIPELINE;
}
if (zp->zp_nopwrite) {
zio->io_pipeline |= ZIO_STAGE_NOP_WRITE;
}
}
-
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
-static int
+static zio_t *
zio_free_bp_init(zio_t *zio)
{
blkptr_t *bp = zio->io_bp;
zio->io_pipeline = ZIO_DDT_FREE_PIPELINE;
}
- return (ZIO_PIPELINE_CONTINUE);
+ ASSERT3P(zio->io_bp, ==, &zio->io_bp_copy);
+
+ return (zio);
}
/*
* If this is a high priority I/O, then use the high priority taskq if
* available.
*/
- if (zio->io_priority == ZIO_PRIORITY_NOW &&
+ if ((zio->io_priority == ZIO_PRIORITY_NOW ||
+ zio->io_priority == ZIO_PRIORITY_SYNC_WRITE) &&
spa->spa_zio_taskq[t][q + 1].stqs_count != 0)
q++;
{
kthread_t *executor = zio->io_executor;
spa_t *spa = zio->io_spa;
- zio_type_t t;
- for (t = 0; t < ZIO_TYPES; t++) {
+ for (zio_type_t 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++) {
return (B_FALSE);
}
-static int
+static zio_t *
zio_issue_async(zio_t *zio)
{
zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_FALSE);
- return (ZIO_PIPELINE_STOP);
+ return (NULL);
}
void
zio_taskq_dispatch(zio, ZIO_TASKQ_INTERRUPT, B_FALSE);
}
+void
+zio_delay_interrupt(zio_t *zio)
+{
+ /*
+ * The timeout_generic() function isn't defined in userspace, so
+ * rather than trying to implement the function, the zio delay
+ * functionality has been disabled for userspace builds.
+ */
+
+#ifdef _KERNEL
+ /*
+ * If io_target_timestamp is zero, then no delay has been registered
+ * for this IO, thus jump to the end of this function and "skip" the
+ * delay; issuing it directly to the zio layer.
+ */
+ if (zio->io_target_timestamp != 0) {
+ hrtime_t now = gethrtime();
+
+ if (now >= zio->io_target_timestamp) {
+ /*
+ * This IO has already taken longer than the target
+ * delay to complete, so we don't want to delay it
+ * any longer; we "miss" the delay and issue it
+ * directly to the zio layer. This is likely due to
+ * the target latency being set to a value less than
+ * the underlying hardware can satisfy (e.g. delay
+ * set to 1ms, but the disks take 10ms to complete an
+ * IO request).
+ */
+
+ DTRACE_PROBE2(zio__delay__miss, zio_t *, zio,
+ hrtime_t, now);
+
+ zio_interrupt(zio);
+ } else {
+ taskqid_t tid;
+ hrtime_t diff = zio->io_target_timestamp - now;
+ clock_t expire_at_tick = ddi_get_lbolt() +
+ NSEC_TO_TICK(diff);
+
+ DTRACE_PROBE3(zio__delay__hit, zio_t *, zio,
+ hrtime_t, now, hrtime_t, diff);
+
+ if (NSEC_TO_TICK(diff) == 0) {
+ /* Our delay is less than a jiffy - just spin */
+ zfs_sleep_until(zio->io_target_timestamp);
+ zio_interrupt(zio);
+ } else {
+ /*
+ * Use taskq_dispatch_delay() in the place of
+ * OpenZFS's timeout_generic().
+ */
+ tid = taskq_dispatch_delay(system_taskq,
+ (task_func_t *)zio_interrupt,
+ zio, TQ_NOSLEEP, expire_at_tick);
+ if (tid == TASKQID_INVALID) {
+ /*
+ * Couldn't allocate a task. Just
+ * finish the zio without a delay.
+ */
+ zio_interrupt(zio);
+ }
+ }
+ }
+ return;
+ }
+#endif
+ DTRACE_PROBE1(zio__delay__skip, zio_t *, zio);
+ zio_interrupt(zio);
+}
+
+static void
+zio_deadman_impl(zio_t *pio, int ziodepth)
+{
+ zio_t *cio, *cio_next;
+ zio_link_t *zl = NULL;
+ vdev_t *vd = pio->io_vd;
+
+ if (zio_deadman_log_all || (vd != NULL && vd->vdev_ops->vdev_op_leaf)) {
+ vdev_queue_t *vq = vd ? &vd->vdev_queue : NULL;
+ zbookmark_phys_t *zb = &pio->io_bookmark;
+ uint64_t delta = gethrtime() - pio->io_timestamp;
+ uint64_t failmode = spa_get_deadman_failmode(pio->io_spa);
+
+ zfs_dbgmsg("slow zio[%d]: zio=%px timestamp=%llu "
+ "delta=%llu queued=%llu io=%llu "
+ "path=%s last=%llu "
+ "type=%d priority=%d flags=0x%x "
+ "stage=0x%x pipeline=0x%x pipeline-trace=0x%x "
+ "objset=%llu object=%llu level=%llu blkid=%llu "
+ "offset=%llu size=%llu error=%d",
+ ziodepth, pio, pio->io_timestamp,
+ delta, pio->io_delta, pio->io_delay,
+ vd ? vd->vdev_path : "NULL", vq ? vq->vq_io_complete_ts : 0,
+ pio->io_type, pio->io_priority, pio->io_flags,
+ pio->io_stage, pio->io_pipeline, pio->io_pipeline_trace,
+ zb->zb_objset, zb->zb_object, zb->zb_level, zb->zb_blkid,
+ pio->io_offset, pio->io_size, pio->io_error);
+ zfs_ereport_post(FM_EREPORT_ZFS_DEADMAN,
+ pio->io_spa, vd, zb, pio, 0, 0);
+
+ if (failmode == ZIO_FAILURE_MODE_CONTINUE &&
+ taskq_empty_ent(&pio->io_tqent)) {
+ zio_interrupt(pio);
+ }
+ }
+
+ mutex_enter(&pio->io_lock);
+ for (cio = zio_walk_children(pio, &zl); cio != NULL; cio = cio_next) {
+ cio_next = zio_walk_children(pio, &zl);
+ zio_deadman_impl(cio, ziodepth + 1);
+ }
+ mutex_exit(&pio->io_lock);
+}
+
+/*
+ * Log the critical information describing this zio and all of its children
+ * using the zfs_dbgmsg() interface then post deadman event for the ZED.
+ */
+void
+zio_deadman(zio_t *pio, char *tag)
+{
+ spa_t *spa = pio->io_spa;
+ char *name = spa_name(spa);
+
+ if (!zfs_deadman_enabled || spa_suspended(spa))
+ return;
+
+ zio_deadman_impl(pio, 0);
+
+ switch (spa_get_deadman_failmode(spa)) {
+ case ZIO_FAILURE_MODE_WAIT:
+ zfs_dbgmsg("%s waiting for hung I/O to pool '%s'", tag, name);
+ break;
+
+ case ZIO_FAILURE_MODE_CONTINUE:
+ zfs_dbgmsg("%s restarting hung I/O for pool '%s'", tag, name);
+ break;
+
+ case ZIO_FAILURE_MODE_PANIC:
+ fm_panic("%s determined I/O to pool '%s' is hung.", tag, name);
+ break;
+ }
+}
+
/*
* Execute the I/O pipeline until one of the following occurs:
* (1) the I/O completes; (2) the pipeline stalls waiting for
spl_fstrans_unmark(cookie);
}
+/*
+ * Used to determine if in the current context the stack is sized large
+ * enough to allow zio_execute() to be called recursively. A minimum
+ * stack size of 16K is required to avoid needing to re-dispatch the zio.
+ */
+boolean_t
+zio_execute_stack_check(zio_t *zio)
+{
+#if !defined(HAVE_LARGE_STACKS)
+ dsl_pool_t *dp = spa_get_dsl(zio->io_spa);
+
+ /* Executing in txg_sync_thread() context. */
+ if (dp && curthread == dp->dp_tx.tx_sync_thread)
+ return (B_TRUE);
+
+ /* Pool initialization outside of zio_taskq context. */
+ if (dp && spa_is_initializing(dp->dp_spa) &&
+ !zio_taskq_member(zio, ZIO_TASKQ_ISSUE) &&
+ !zio_taskq_member(zio, ZIO_TASKQ_ISSUE_HIGH))
+ return (B_TRUE);
+#endif /* HAVE_LARGE_STACKS */
+
+ return (B_FALSE);
+}
+
__attribute__((always_inline))
static inline void
__zio_execute(zio_t *zio)
{
- zio->io_executor = curthread;
+ ASSERT3U(zio->io_queued_timestamp, >, 0);
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;
+
+ zio->io_executor = curthread;
ASSERT(!MUTEX_HELD(&zio->io_lock));
ASSERT(ISP2(stage));
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 the current context doesn't have large enough stacks
+ * the zio must be issued asynchronously to prevent overflow.
*/
- 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))) {
+ if (zio_execute_stack_check(zio)) {
+ 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[highbit64(stage) - 1](zio);
+ zio->io_pipeline_trace |= zio->io_stage;
- if (rv == ZIO_PIPELINE_STOP)
- return;
+ /*
+ * The zio pipeline stage returns the next zio to execute
+ * (typically the same as this one), or NULL if we should
+ * stop.
+ */
+ zio = zio_pipeline[highbit64(stage) - 1](zio);
- ASSERT(rv == ZIO_PIPELINE_CONTINUE);
+ if (zio == NULL)
+ return;
}
}
int
zio_wait(zio_t *zio)
{
+ long timeout = MSEC_TO_TICK(zfs_deadman_ziotime_ms);
int error;
- ASSERT(zio->io_stage == ZIO_STAGE_OPEN);
- ASSERT(zio->io_executor == NULL);
+ ASSERT3S(zio->io_stage, ==, ZIO_STAGE_OPEN);
+ ASSERT3P(zio->io_executor, ==, NULL);
zio->io_waiter = curthread;
+ ASSERT0(zio->io_queued_timestamp);
+ zio->io_queued_timestamp = gethrtime();
__zio_execute(zio);
mutex_enter(&zio->io_lock);
- while (zio->io_executor != NULL)
- cv_wait_io(&zio->io_cv, &zio->io_lock);
+ while (zio->io_executor != NULL) {
+ error = cv_timedwait_io(&zio->io_cv, &zio->io_lock,
+ ddi_get_lbolt() + timeout);
+
+ if (zfs_deadman_enabled && error == -1 &&
+ gethrtime() - zio->io_queued_timestamp >
+ spa_deadman_ziotime(zio->io_spa)) {
+ mutex_exit(&zio->io_lock);
+ timeout = MSEC_TO_TICK(zfs_deadman_checktime_ms);
+ zio_deadman(zio, FTAG);
+ mutex_enter(&zio->io_lock);
+ }
+ }
mutex_exit(&zio->io_lock);
error = zio->io_error;
void
zio_nowait(zio_t *zio)
{
- ASSERT(zio->io_executor == NULL);
+ ASSERT3P(zio->io_executor, ==, NULL);
if (zio->io_child_type == ZIO_CHILD_LOGICAL &&
zio_unique_parent(zio) == NULL) {
zio_add_child(pio, zio);
}
+ ASSERT0(zio->io_queued_timestamp);
+ zio->io_queued_timestamp = gethrtime();
__zio_execute(zio);
}
/*
* ==========================================================================
- * Reexecute or suspend/resume failed I/O
+ * Reexecute, cancel, or suspend/resume failed I/O
* ==========================================================================
*/
zio_reexecute(zio_t *pio)
{
zio_t *cio, *cio_next;
- int c, w;
ASSERT(pio->io_child_type == ZIO_CHILD_LOGICAL);
ASSERT(pio->io_orig_stage == ZIO_STAGE_OPEN);
pio->io_pipeline = pio->io_orig_pipeline;
pio->io_reexecute = 0;
pio->io_flags |= ZIO_FLAG_REEXECUTED;
+ pio->io_pipeline_trace = 0;
pio->io_error = 0;
- for (w = 0; w < ZIO_WAIT_TYPES; w++)
+ for (int w = 0; w < ZIO_WAIT_TYPES; w++)
pio->io_state[w] = 0;
- for (c = 0; c < ZIO_CHILD_TYPES; c++)
+ for (int c = 0; c < ZIO_CHILD_TYPES; c++)
pio->io_child_error[c] = 0;
if (IO_IS_ALLOCATING(pio))
* the remainder of pio's io_child_list, from 'cio_next' onward,
* cannot be affected by any side effects of reexecuting 'cio'.
*/
- for (cio = zio_walk_children(pio); cio != NULL; cio = cio_next) {
- cio_next = zio_walk_children(pio);
- mutex_enter(&pio->io_lock);
- for (w = 0; w < ZIO_WAIT_TYPES; w++)
+ zio_link_t *zl = NULL;
+ mutex_enter(&pio->io_lock);
+ for (cio = zio_walk_children(pio, &zl); cio != NULL; cio = cio_next) {
+ cio_next = zio_walk_children(pio, &zl);
+ for (int w = 0; w < ZIO_WAIT_TYPES; w++)
pio->io_children[cio->io_child_type][w]++;
mutex_exit(&pio->io_lock);
zio_reexecute(cio);
+ mutex_enter(&pio->io_lock);
}
+ mutex_exit(&pio->io_lock);
/*
* Now that all children have been reexecuted, execute the parent.
* We don't reexecute "The Godfather" I/O here as it's the
- * responsibility of the caller to wait on him.
+ * responsibility of the caller to wait on it.
*/
- if (!(pio->io_flags & ZIO_FLAG_GODFATHER))
+ if (!(pio->io_flags & ZIO_FLAG_GODFATHER)) {
+ pio->io_queued_timestamp = gethrtime();
__zio_execute(pio);
+ }
}
void
-zio_suspend(spa_t *spa, zio_t *zio)
+zio_suspend(spa_t *spa, zio_t *zio, zio_suspend_reason_t reason)
{
if (spa_get_failmode(spa) == ZIO_FAILURE_MODE_PANIC)
fm_panic("Pool '%s' has encountered an uncorrectable I/O "
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);
+ zfs_ereport_post(FM_EREPORT_ZFS_IO_FAILURE, spa, NULL,
+ NULL, NULL, 0, 0);
mutex_enter(&spa->spa_suspend_lock);
ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
ZIO_FLAG_GODFATHER);
- spa->spa_suspended = B_TRUE;
+ spa->spa_suspended = reason;
if (zio != NULL) {
ASSERT(!(zio->io_flags & ZIO_FLAG_GODFATHER));
* Reexecute all previously suspended i/o.
*/
mutex_enter(&spa->spa_suspend_lock);
- spa->spa_suspended = B_FALSE;
+ spa->spa_suspended = ZIO_SUSPEND_NONE;
cv_broadcast(&spa->spa_suspend_cv);
pio = spa->spa_suspend_zio_root;
spa->spa_suspend_zio_root = NULL;
* ==========================================================================
*/
+static void
+zio_gang_issue_func_done(zio_t *zio)
+{
+ abd_put(zio->io_abd);
+}
+
static zio_t *
-zio_read_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, void *data)
+zio_read_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data,
+ uint64_t offset)
{
if (gn != NULL)
return (pio);
- return (zio_read(pio, pio->io_spa, bp, data, BP_GET_PSIZE(bp),
- NULL, NULL, pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio),
+ return (zio_read(pio, pio->io_spa, bp, abd_get_offset(data, offset),
+ BP_GET_PSIZE(bp), zio_gang_issue_func_done,
+ NULL, pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio),
&pio->io_bookmark));
}
-zio_t *
-zio_rewrite_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, void *data)
+static zio_t *
+zio_rewrite_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data,
+ uint64_t offset)
{
zio_t *zio;
if (gn != NULL) {
+ abd_t *gbh_abd =
+ abd_get_from_buf(gn->gn_gbh, SPA_GANGBLOCKSIZE);
zio = zio_rewrite(pio, pio->io_spa, pio->io_txg, bp,
- gn->gn_gbh, SPA_GANGBLOCKSIZE, NULL, NULL, pio->io_priority,
- ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark);
+ gbh_abd, SPA_GANGBLOCKSIZE, zio_gang_issue_func_done, NULL,
+ pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio),
+ &pio->io_bookmark);
/*
* As we rewrite each gang header, the pipeline will compute
* a new gang block header checksum for it; but no one will
* this is just good hygiene.)
*/
if (gn != pio->io_gang_leader->io_gang_tree) {
+ abd_t *buf = abd_get_offset(data, offset);
+
zio_checksum_compute(zio, BP_GET_CHECKSUM(bp),
- data, BP_GET_PSIZE(bp));
+ buf, BP_GET_PSIZE(bp));
+
+ abd_put(buf);
}
/*
* If we are here to damage data for testing purposes,
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,
+ abd_get_offset(data, offset), BP_GET_PSIZE(bp),
+ zio_gang_issue_func_done, NULL, pio->io_priority,
ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark);
}
}
/* ARGSUSED */
-zio_t *
-zio_free_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, void *data)
+static zio_t *
+zio_free_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data,
+ uint64_t offset)
{
return (zio_free_sync(pio, pio->io_spa, pio->io_txg, bp,
ZIO_GANG_CHILD_FLAGS(pio)));
}
/* ARGSUSED */
-zio_t *
-zio_claim_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, void *data)
+static zio_t *
+zio_claim_gang(zio_t *pio, blkptr_t *bp, zio_gang_node_t *gn, abd_t *data,
+ uint64_t offset)
{
return (zio_claim(pio, pio->io_spa, pio->io_txg, bp,
NULL, NULL, ZIO_GANG_CHILD_FLAGS(pio)));
ASSERT(*gnpp == NULL);
- gn = kmem_zalloc(sizeof (*gn), KM_PUSHPAGE);
+ gn = kmem_zalloc(sizeof (*gn), KM_SLEEP);
gn->gn_gbh = zio_buf_alloc(SPA_GANGBLOCKSIZE);
*gnpp = gn;
zio_gang_node_free(zio_gang_node_t **gnpp)
{
zio_gang_node_t *gn = *gnpp;
- int g;
- for (g = 0; g < SPA_GBH_NBLKPTRS; g++)
+ for (int g = 0; g < SPA_GBH_NBLKPTRS; g++)
ASSERT(gn->gn_child[g] == NULL);
zio_buf_free(gn->gn_gbh, SPA_GANGBLOCKSIZE);
zio_gang_tree_free(zio_gang_node_t **gnpp)
{
zio_gang_node_t *gn = *gnpp;
- int g;
if (gn == NULL)
return;
- for (g = 0; g < SPA_GBH_NBLKPTRS; g++)
+ for (int g = 0; g < SPA_GBH_NBLKPTRS; g++)
zio_gang_tree_free(&gn->gn_child[g]);
zio_gang_node_free(gnpp);
zio_gang_tree_assemble(zio_t *gio, blkptr_t *bp, zio_gang_node_t **gnpp)
{
zio_gang_node_t *gn = zio_gang_node_alloc(gnpp);
+ abd_t *gbh_abd = abd_get_from_buf(gn->gn_gbh, SPA_GANGBLOCKSIZE);
ASSERT(gio->io_gang_leader == gio);
ASSERT(BP_IS_GANG(bp));
- zio_nowait(zio_read(gio, gio->io_spa, bp, gn->gn_gbh,
- SPA_GANGBLOCKSIZE, zio_gang_tree_assemble_done, gn,
- gio->io_priority, ZIO_GANG_CHILD_FLAGS(gio), &gio->io_bookmark));
+ zio_nowait(zio_read(gio, gio->io_spa, bp, gbh_abd, SPA_GANGBLOCKSIZE,
+ zio_gang_tree_assemble_done, gn, gio->io_priority,
+ ZIO_GANG_CHILD_FLAGS(gio), &gio->io_bookmark));
}
static void
zio_t *gio = zio->io_gang_leader;
zio_gang_node_t *gn = zio->io_private;
blkptr_t *bp = zio->io_bp;
- int g;
ASSERT(gio == zio_unique_parent(zio));
ASSERT(zio->io_child_count == 0);
if (zio->io_error)
return;
+ /* this ABD was created from a linear buf in zio_gang_tree_assemble */
if (BP_SHOULD_BYTESWAP(bp))
- byteswap_uint64_array(zio->io_data, zio->io_size);
+ byteswap_uint64_array(abd_to_buf(zio->io_abd), zio->io_size);
- ASSERT(zio->io_data == gn->gn_gbh);
+ ASSERT3P(abd_to_buf(zio->io_abd), ==, gn->gn_gbh);
ASSERT(zio->io_size == SPA_GANGBLOCKSIZE);
ASSERT(gn->gn_gbh->zg_tail.zec_magic == ZEC_MAGIC);
- for (g = 0; g < SPA_GBH_NBLKPTRS; g++) {
+ abd_put(zio->io_abd);
+
+ for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) {
blkptr_t *gbp = &gn->gn_gbh->zg_blkptr[g];
if (!BP_IS_GANG(gbp))
continue;
}
static void
-zio_gang_tree_issue(zio_t *pio, zio_gang_node_t *gn, blkptr_t *bp, void *data)
+zio_gang_tree_issue(zio_t *pio, zio_gang_node_t *gn, blkptr_t *bp, abd_t *data,
+ uint64_t offset)
{
zio_t *gio = pio->io_gang_leader;
zio_t *zio;
- int g;
ASSERT(BP_IS_GANG(bp) == !!gn);
ASSERT(BP_GET_CHECKSUM(bp) == BP_GET_CHECKSUM(gio->io_bp));
* If you're a gang header, your data is in gn->gn_gbh.
* If you're a gang member, your data is in 'data' and gn == NULL.
*/
- zio = zio_gang_issue_func[gio->io_type](pio, bp, gn, data);
+ zio = zio_gang_issue_func[gio->io_type](pio, bp, gn, data, offset);
if (gn != NULL) {
ASSERT(gn->gn_gbh->zg_tail.zec_magic == ZEC_MAGIC);
- for (g = 0; g < SPA_GBH_NBLKPTRS; g++) {
+ for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) {
blkptr_t *gbp = &gn->gn_gbh->zg_blkptr[g];
if (BP_IS_HOLE(gbp))
continue;
- zio_gang_tree_issue(zio, gn->gn_child[g], gbp, data);
- data = (char *)data + BP_GET_PSIZE(gbp);
+ zio_gang_tree_issue(zio, gn->gn_child[g], gbp, data,
+ offset);
+ offset += BP_GET_PSIZE(gbp);
}
}
if (gn == gio->io_gang_tree)
- ASSERT3P((char *)gio->io_data + gio->io_size, ==, data);
+ ASSERT3U(gio->io_size, ==, offset);
if (zio != pio)
zio_nowait(zio);
}
-static int
+static zio_t *
zio_gang_assemble(zio_t *zio)
{
blkptr_t *bp = zio->io_bp;
zio_gang_tree_assemble(zio, bp, &zio->io_gang_tree);
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
-static int
+static zio_t *
zio_gang_issue(zio_t *zio)
{
blkptr_t *bp = zio->io_bp;
- if (zio_wait_for_children(zio, ZIO_CHILD_GANG, ZIO_WAIT_DONE))
- return (ZIO_PIPELINE_STOP);
+ if (zio_wait_for_children(zio, ZIO_CHILD_GANG_BIT, ZIO_WAIT_DONE)) {
+ return (NULL);
+ }
ASSERT(BP_IS_GANG(bp) && zio->io_gang_leader == zio);
ASSERT(zio->io_child_type > ZIO_CHILD_GANG);
if (zio->io_child_error[ZIO_CHILD_GANG] == 0)
- zio_gang_tree_issue(zio, zio->io_gang_tree, bp, zio->io_data);
+ zio_gang_tree_issue(zio, zio->io_gang_tree, bp, zio->io_abd,
+ 0);
else
zio_gang_tree_free(&zio->io_gang_tree);
zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
static void
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))
ASSERT3U(BP_GET_NDVAS(zio->io_bp), <=, BP_GET_NDVAS(pio->io_bp));
mutex_enter(&pio->io_lock);
- for (d = 0; d < BP_GET_NDVAS(zio->io_bp); d++) {
+ for (int d = 0; d < BP_GET_NDVAS(zio->io_bp); d++) {
ASSERT(DVA_GET_GANG(&pdva[d]));
asize = DVA_GET_ASIZE(&pdva[d]);
asize += DVA_GET_ASIZE(&cdva[d]);
mutex_exit(&pio->io_lock);
}
-static int
+static void
+zio_write_gang_done(zio_t *zio)
+{
+ /*
+ * The io_abd field will be NULL for a zio with no data. The io_flags
+ * will initially have the ZIO_FLAG_NODATA bit flag set, but we can't
+ * check for it here as it is cleared in zio_ready.
+ */
+ if (zio->io_abd != NULL)
+ abd_put(zio->io_abd);
+}
+
+static zio_t *
zio_write_gang_block(zio_t *pio)
{
spa_t *spa = pio->io_spa;
+ metaslab_class_t *mc = spa_normal_class(spa);
blkptr_t *bp = pio->io_bp;
zio_t *gio = pio->io_gang_leader;
zio_t *zio;
zio_gang_node_t *gn, **gnpp;
zio_gbh_phys_t *gbh;
+ abd_t *gbh_abd;
uint64_t txg = pio->io_txg;
uint64_t resid = pio->io_size;
uint64_t lsize;
int copies = gio->io_prop.zp_copies;
- int gbh_copies = MIN(copies + 1, spa_max_replication(spa));
+ int gbh_copies;
zio_prop_t zp;
- int g, error;
+ int error;
+ boolean_t has_data = !(pio->io_flags & ZIO_FLAG_NODATA);
+
+ /*
+ * encrypted blocks need DVA[2] free so encrypted gang headers can't
+ * have a third copy.
+ */
+ gbh_copies = MIN(copies + 1, spa_max_replication(spa));
+ if (gio->io_prop.zp_encrypt && gbh_copies >= SPA_DVAS_PER_BP)
+ gbh_copies = SPA_DVAS_PER_BP - 1;
+
+ int flags = METASLAB_HINTBP_FAVOR | METASLAB_GANG_HEADER;
+ if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) {
+ ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE);
+ ASSERT(has_data);
- 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);
+ flags |= METASLAB_ASYNC_ALLOC;
+ VERIFY(zfs_refcount_held(&mc->mc_alloc_slots[pio->io_allocator],
+ pio));
+
+ /*
+ * The logical zio has already placed a reservation for
+ * 'copies' allocation slots but gang blocks may require
+ * additional copies. These additional copies
+ * (i.e. gbh_copies - copies) are guaranteed to succeed
+ * since metaslab_class_throttle_reserve() always allows
+ * additional reservations for gang blocks.
+ */
+ VERIFY(metaslab_class_throttle_reserve(mc, gbh_copies - copies,
+ pio->io_allocator, pio, flags));
+ }
+
+ error = metaslab_alloc(spa, mc, SPA_GANGBLOCKSIZE,
+ bp, gbh_copies, txg, pio == gio ? NULL : gio->io_bp, flags,
+ &pio->io_alloc_list, pio, pio->io_allocator);
if (error) {
+ if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) {
+ ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE);
+ ASSERT(has_data);
+
+ /*
+ * If we failed to allocate the gang block header then
+ * we remove any additional allocation reservations that
+ * we placed here. The original reservation will
+ * be removed when the logical I/O goes to the ready
+ * stage.
+ */
+ metaslab_class_throttle_unreserve(mc,
+ gbh_copies - copies, pio->io_allocator, pio);
+ }
+
pio->io_error = error;
- return (ZIO_PIPELINE_CONTINUE);
+ return (pio);
}
if (pio == gio) {
gn = zio_gang_node_alloc(gnpp);
gbh = gn->gn_gbh;
bzero(gbh, SPA_GANGBLOCKSIZE);
+ gbh_abd = abd_get_from_buf(gbh, SPA_GANGBLOCKSIZE);
/*
* Create the gang header.
*/
- zio = zio_rewrite(pio, spa, txg, bp, gbh, SPA_GANGBLOCKSIZE, NULL, NULL,
- pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark);
+ zio = zio_rewrite(pio, spa, txg, bp, gbh_abd, SPA_GANGBLOCKSIZE,
+ zio_write_gang_done, NULL, pio->io_priority,
+ ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark);
/*
* Create and nowait the gang children.
*/
- for (g = 0; resid != 0; resid -= lsize, g++) {
+ for (int g = 0; resid != 0; resid -= lsize, g++) {
lsize = P2ROUNDUP(resid / (SPA_GBH_NBLKPTRS - g),
SPA_MINBLOCKSIZE);
ASSERT(lsize >= SPA_MINBLOCKSIZE && lsize <= resid);
zp.zp_dedup = B_FALSE;
zp.zp_dedup_verify = B_FALSE;
zp.zp_nopwrite = B_FALSE;
+ zp.zp_encrypt = gio->io_prop.zp_encrypt;
+ zp.zp_byteorder = gio->io_prop.zp_byteorder;
+ bzero(zp.zp_salt, ZIO_DATA_SALT_LEN);
+ bzero(zp.zp_iv, ZIO_DATA_IV_LEN);
+ bzero(zp.zp_mac, ZIO_DATA_MAC_LEN);
+
+ zio_t *cio = zio_write(zio, spa, txg, &gbh->zg_blkptr[g],
+ has_data ? abd_get_offset(pio->io_abd, pio->io_size -
+ resid) : NULL, lsize, lsize, &zp,
+ zio_write_gang_member_ready, NULL, NULL,
+ zio_write_gang_done, &gn->gn_child[g], pio->io_priority,
+ ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark);
- 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, NULL, &gn->gn_child[g],
- pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio),
- &pio->io_bookmark));
+ if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) {
+ ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE);
+ ASSERT(has_data);
+
+ /*
+ * Gang children won't throttle but we should
+ * account for their work, so reserve an allocation
+ * slot for them here.
+ */
+ VERIFY(metaslab_class_throttle_reserve(mc,
+ zp.zp_copies, cio->io_allocator, cio, flags));
+ }
+ zio_nowait(cio);
}
/*
zio_nowait(zio);
- return (ZIO_PIPELINE_CONTINUE);
+ return (pio);
}
/*
- * 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.
+ * The zio_nop_write stage in the pipeline determines if allocating a
+ * new bp is necessary. 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.
+ *
+ * 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. Note that our requirements for
+ * cryptographic strength are fairly weak: there can't be any accidental
+ * hash collisions, but we don't need to be secure against intentional
+ * (malicious) collisions. To trigger a nopwrite, you have to be able
+ * to write the file to begin with, and triggering an incorrect (hash
+ * collision) nopwrite is no worse than simply writing to the file.
+ * That said, there are no known attacks against the checksum algorithms
+ * used for nopwrite, assuming that the salt and the checksums
+ * themselves remain secret.
*/
-static int
+static zio_t *
zio_nop_write(zio_t *zio)
{
blkptr_t *bp = zio->io_bp;
* allocate a new bp.
*/
if (BP_IS_HOLE(bp_orig) ||
- !zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_dedup ||
+ !(zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_flags &
+ ZCHECKSUM_FLAG_NOPWRITE) ||
+ BP_IS_ENCRYPTED(bp) || BP_IS_ENCRYPTED(bp_orig) ||
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);
+ return (zio);
/*
* 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);
+ ASSERT(zio_checksum_table[zp->zp_checksum].ci_flags &
+ ZCHECKSUM_FLAG_NOPWRITE);
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);
zio->io_flags |= ZIO_FLAG_NOPWRITE;
}
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
/*
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;
+
+ if (zio->io_error == 0 && dde->dde_repair_abd == NULL)
+ dde->dde_repair_abd = zio->io_abd;
else
- zio_buf_free(zio->io_data, zio->io_size);
+ abd_free(zio->io_abd);
mutex_exit(&pio->io_lock);
}
-static int
+static zio_t *
zio_ddt_read_start(zio_t *zio)
{
blkptr_t *bp = zio->io_bp;
- int p;
ASSERT(BP_GET_DEDUP(bp));
ASSERT(BP_GET_PSIZE(bp) == zio->io_size);
zio->io_vsd = dde;
if (ddp_self == NULL)
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
- for (p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
+ 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));
+ abd_alloc_for_io(zio->io_size, B_TRUE),
+ 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);
+ return (zio);
}
zio_nowait(zio_read(zio, zio->io_spa, bp,
- zio->io_data, zio->io_size, NULL, NULL, zio->io_priority,
+ zio->io_abd, zio->io_size, NULL, NULL, zio->io_priority,
ZIO_DDT_CHILD_FLAGS(zio), &zio->io_bookmark));
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
-static int
+static zio_t *
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);
+ if (zio_wait_for_children(zio, ZIO_CHILD_DDT_BIT, ZIO_WAIT_DONE)) {
+ return (NULL);
+ }
ASSERT(BP_GET_DEDUP(bp));
ASSERT(BP_GET_PSIZE(bp) == zio->io_size);
ddt_entry_t *dde = zio->io_vsd;
if (ddt == NULL) {
ASSERT(spa_load_state(zio->io_spa) != SPA_LOAD_NONE);
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
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);
+ return (NULL);
}
- if (dde->dde_repair_data != NULL) {
- bcopy(dde->dde_repair_data, zio->io_data, zio->io_size);
+ if (dde->dde_repair_abd != NULL) {
+ abd_copy(zio->io_abd, dde->dde_repair_abd,
+ zio->io_size);
zio->io_child_error[ZIO_CHILD_DDT] = 0;
}
ddt_repair_done(ddt, dde);
ASSERT(zio->io_vsd == NULL);
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
static boolean_t
zio_ddt_collision(zio_t *zio, ddt_t *ddt, ddt_entry_t *dde)
{
spa_t *spa = zio->io_spa;
- int p;
+ boolean_t do_raw = !!(zio->io_flags & ZIO_FLAG_RAW);
+
+ ASSERT(!(zio->io_bp_override && do_raw));
/*
* 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.
+ * However, we should never get a raw, override zio so in these
+ * cases we can compare the io_abd directly. This is useful because
+ * it allows us to do dedup verification even if we don't have access
+ * to the original data (for instance, if the encryption keys aren't
+ * loaded).
*/
- for (p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) {
+
+ for (int p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) {
zio_t *lio = dde->dde_lead_zio[p];
- if (lio != NULL) {
+ if (lio != NULL && do_raw) {
+ return (lio->io_size != zio->io_size ||
+ abd_cmp(zio->io_abd, lio->io_abd) != 0);
+ } else 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);
+ abd_cmp(zio->io_orig_abd, lio->io_orig_abd) != 0);
}
}
- for (p = DDT_PHYS_SINGLE; p <= DDT_PHYS_TRIPLE; p++) {
+ 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) {
+ if (ddp->ddp_phys_birth != 0 && do_raw) {
+ blkptr_t blk = *zio->io_bp;
+ uint64_t psize;
+ abd_t *tmpabd;
+ int error;
+
+ ddt_bp_fill(ddp, &blk, ddp->ddp_phys_birth);
+ psize = BP_GET_PSIZE(&blk);
+
+ if (psize != zio->io_size)
+ return (B_TRUE);
+
+ ddt_exit(ddt);
+
+ tmpabd = abd_alloc_for_io(psize, B_TRUE);
+
+ error = zio_wait(zio_read(NULL, spa, &blk, tmpabd,
+ psize, NULL, NULL, ZIO_PRIORITY_SYNC_READ,
+ ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
+ ZIO_FLAG_RAW, &zio->io_bookmark));
+
+ if (error == 0) {
+ if (abd_cmp(tmpabd, zio->io_abd) != 0)
+ error = SET_ERROR(ENOENT);
+ }
+
+ abd_free(tmpabd);
+ ddt_enter(ddt);
+ return (error != 0);
+ } else if (ddp->ddp_phys_birth != 0) {
arc_buf_t *abuf = NULL;
- uint32_t aflags = ARC_WAIT;
+ arc_flags_t aflags = ARC_FLAG_WAIT;
blkptr_t blk = *zio->io_bp;
int error;
ddt_bp_fill(ddp, &blk, ddp->ddp_phys_birth);
+ if (BP_GET_LSIZE(&blk) != zio->io_orig_size)
+ return (B_TRUE);
+
ddt_exit(ddt);
error = arc_read(NULL, spa, &blk,
&aflags, &zio->io_bookmark);
if (error == 0) {
- if (arc_buf_size(abuf) != zio->io_orig_size ||
- bcmp(abuf->b_data, zio->io_orig_data,
+ if (abd_cmp_buf(zio->io_orig_abd, abuf->b_data,
zio->io_orig_size) != 0)
- error = SET_ERROR(EEXIST);
- VERIFY(arc_buf_remove_ref(abuf, &abuf));
+ error = SET_ERROR(ENOENT);
+ arc_buf_destroy(abuf, &abuf);
}
ddt_enter(ddt);
ddt_phys_fill(ddp, zio->io_bp);
- while ((pio = zio_walk_parents(zio)) != NULL)
+ zio_link_t *zl = NULL;
+ while ((pio = zio_walk_parents(zio, &zl)) != NULL)
ddt_bp_fill(ddp, pio->io_bp, zio->io_txg);
ddt_exit(ddt);
dde->dde_lead_zio[p] = NULL;
if (zio->io_error == 0) {
- while (zio_walk_parents(zio) != NULL)
+ zio_link_t *zl = NULL;
+ while (zio_walk_parents(zio, &zl) != NULL)
ddt_phys_addref(ddp);
} else {
ddt_phys_clear(ddp);
zio_ddt_ditto_write_done(zio_t *zio)
{
int p = DDT_PHYS_DITTO;
+ ASSERTV(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);
ddt_exit(ddt);
}
-static int
+static zio_t *
zio_ddt_write(zio_t *zio)
{
spa_t *spa = zio->io_spa;
ASSERT(BP_GET_DEDUP(bp));
ASSERT(BP_GET_CHECKSUM(bp) == zp->zp_checksum);
ASSERT(BP_IS_HOLE(bp) || zio->io_bp_override);
+ ASSERT(!(zio->io_bp_override && (zio->io_flags & ZIO_FLAG_RAW)));
ddt_enter(ddt);
dde = ddt_lookup(ddt, bp, B_TRUE);
* 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) {
+ if (!(zio_checksum_table[zp->zp_checksum].ci_flags &
+ ZCHECKSUM_FLAG_DEDUP)) {
zp->zp_checksum = spa_dedup_checksum(spa);
zio_pop_transforms(zio);
zio->io_stage = ZIO_STAGE_OPEN;
}
zio->io_pipeline = ZIO_WRITE_PIPELINE;
ddt_exit(ddt);
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
ditto_copies = ddt_ditto_copies_needed(ddt, dde, ddp);
zio->io_bp_override = NULL;
BP_ZERO(bp);
ddt_exit(ddt);
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
- dio = zio_write(zio, spa, txg, bp, zio->io_orig_data,
- zio->io_orig_size, &czp, NULL, NULL,
- zio_ddt_ditto_write_done, dde, zio->io_priority,
+ dio = zio_write(zio, spa, txg, bp, zio->io_orig_abd,
+ zio->io_orig_size, zio->io_orig_size, &czp, NULL, NULL,
+ 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);
+ zio_push_transform(dio, zio->io_abd, zio->io_size, 0, NULL);
dde->dde_lead_zio[DDT_PHYS_DITTO] = dio;
}
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, NULL,
+ cio = zio_write(zio, spa, txg, bp, zio->io_orig_abd,
+ zio->io_orig_size, zio->io_orig_size, zp,
+ zio_ddt_child_write_ready, NULL, NULL,
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);
+ zio_push_transform(cio, zio->io_abd, zio->io_size, 0, NULL);
dde->dde_lead_zio[p] = cio;
}
if (dio)
zio_nowait(dio);
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
ddt_entry_t *freedde; /* for debugging */
-static int
+static zio_t *
zio_ddt_free(zio_t *zio)
{
spa_t *spa = zio->io_spa;
}
ddt_exit(ddt);
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
/*
* Allocate and free blocks
* ==========================================================================
*/
-static int
+
+static zio_t *
+zio_io_to_allocate(spa_t *spa, int allocator)
+{
+ zio_t *zio;
+
+ ASSERT(MUTEX_HELD(&spa->spa_alloc_locks[allocator]));
+
+ zio = avl_first(&spa->spa_alloc_trees[allocator]);
+ if (zio == NULL)
+ return (NULL);
+
+ ASSERT(IO_IS_ALLOCATING(zio));
+
+ /*
+ * Try to place a reservation for this zio. If we're unable to
+ * reserve then we throttle.
+ */
+ ASSERT3U(zio->io_allocator, ==, allocator);
+ if (!metaslab_class_throttle_reserve(zio->io_metaslab_class,
+ zio->io_prop.zp_copies, zio->io_allocator, zio, 0)) {
+ return (NULL);
+ }
+
+ avl_remove(&spa->spa_alloc_trees[allocator], zio);
+ ASSERT3U(zio->io_stage, <, ZIO_STAGE_DVA_ALLOCATE);
+
+ return (zio);
+}
+
+static zio_t *
+zio_dva_throttle(zio_t *zio)
+{
+ spa_t *spa = zio->io_spa;
+ zio_t *nio;
+ metaslab_class_t *mc;
+
+ /* locate an appropriate allocation class */
+ mc = spa_preferred_class(spa, zio->io_size, zio->io_prop.zp_type,
+ zio->io_prop.zp_level, zio->io_prop.zp_zpl_smallblk);
+
+ if (zio->io_priority == ZIO_PRIORITY_SYNC_WRITE ||
+ !mc->mc_alloc_throttle_enabled ||
+ zio->io_child_type == ZIO_CHILD_GANG ||
+ zio->io_flags & ZIO_FLAG_NODATA) {
+ return (zio);
+ }
+
+ ASSERT(zio->io_child_type > ZIO_CHILD_GANG);
+
+ ASSERT3U(zio->io_queued_timestamp, >, 0);
+ ASSERT(zio->io_stage == ZIO_STAGE_DVA_THROTTLE);
+
+ zbookmark_phys_t *bm = &zio->io_bookmark;
+ /*
+ * We want to try to use as many allocators as possible to help improve
+ * performance, but we also want logically adjacent IOs to be physically
+ * adjacent to improve sequential read performance. We chunk each object
+ * into 2^20 block regions, and then hash based on the objset, object,
+ * level, and region to accomplish both of these goals.
+ */
+ zio->io_allocator = cityhash4(bm->zb_objset, bm->zb_object,
+ bm->zb_level, bm->zb_blkid >> 20) % spa->spa_alloc_count;
+ mutex_enter(&spa->spa_alloc_locks[zio->io_allocator]);
+ ASSERT(zio->io_type == ZIO_TYPE_WRITE);
+ zio->io_metaslab_class = mc;
+ avl_add(&spa->spa_alloc_trees[zio->io_allocator], zio);
+ nio = zio_io_to_allocate(spa, zio->io_allocator);
+ mutex_exit(&spa->spa_alloc_locks[zio->io_allocator]);
+ return (nio);
+}
+
+static void
+zio_allocate_dispatch(spa_t *spa, int allocator)
+{
+ zio_t *zio;
+
+ mutex_enter(&spa->spa_alloc_locks[allocator]);
+ zio = zio_io_to_allocate(spa, allocator);
+ mutex_exit(&spa->spa_alloc_locks[allocator]);
+ if (zio == NULL)
+ return;
+
+ ASSERT3U(zio->io_stage, ==, ZIO_STAGE_DVA_THROTTLE);
+ ASSERT0(zio->io_error);
+ zio_taskq_dispatch(zio, ZIO_TASKQ_ISSUE, B_TRUE);
+}
+
+static zio_t *
zio_dva_allocate(zio_t *zio)
{
spa_t *spa = zio->io_spa;
- metaslab_class_t *mc = spa_normal_class(spa);
+ metaslab_class_t *mc;
blkptr_t *bp = zio->io_bp;
int error;
int flags = 0;
ASSERT3U(zio->io_prop.zp_copies, <=, spa_max_replication(spa));
ASSERT3U(zio->io_size, ==, BP_GET_PSIZE(bp));
+ flags |= (zio->io_flags & ZIO_FLAG_FASTWRITE) ? METASLAB_FASTWRITE : 0;
+ if (zio->io_flags & ZIO_FLAG_NODATA)
+ flags |= METASLAB_DONT_THROTTLE;
+ if (zio->io_flags & ZIO_FLAG_GANG_CHILD)
+ flags |= METASLAB_GANG_CHILD;
+ if (zio->io_priority == ZIO_PRIORITY_ASYNC_WRITE)
+ flags |= METASLAB_ASYNC_ALLOC;
+
/*
- * 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.
+ * if not already chosen, locate an appropriate allocation class
*/
- 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;
+ mc = zio->io_metaslab_class;
+ if (mc == NULL) {
+ mc = spa_preferred_class(spa, zio->io_size,
+ zio->io_prop.zp_type, zio->io_prop.zp_level,
+ zio->io_prop.zp_zpl_smallblk);
+ zio->io_metaslab_class = mc;
+ }
+
error = metaslab_alloc(spa, mc, zio->io_size, bp,
- zio->io_prop.zp_copies, zio->io_txg, NULL, flags);
+ zio->io_prop.zp_copies, zio->io_txg, NULL, flags,
+ &zio->io_alloc_list, zio, zio->io_allocator);
- if (error) {
- spa_dbgmsg(spa, "%s: metaslab allocation failure: zio %p, "
+ /*
+ * Fallback to normal class when an alloc class is full
+ */
+ if (error == ENOSPC && mc != spa_normal_class(spa)) {
+ /*
+ * If throttling, transfer reservation over to normal class.
+ * The io_allocator slot can remain the same even though we
+ * are switching classes.
+ */
+ if (mc->mc_alloc_throttle_enabled &&
+ (zio->io_flags & ZIO_FLAG_IO_ALLOCATING)) {
+ metaslab_class_throttle_unreserve(mc,
+ zio->io_prop.zp_copies, zio->io_allocator, zio);
+ zio->io_flags &= ~ZIO_FLAG_IO_ALLOCATING;
+
+ mc = spa_normal_class(spa);
+ VERIFY(metaslab_class_throttle_reserve(mc,
+ zio->io_prop.zp_copies, zio->io_allocator, zio,
+ flags | METASLAB_MUST_RESERVE));
+ } else {
+ mc = spa_normal_class(spa);
+ }
+ zio->io_metaslab_class = mc;
+
+ error = metaslab_alloc(spa, mc, zio->io_size, bp,
+ zio->io_prop.zp_copies, zio->io_txg, NULL, flags,
+ &zio->io_alloc_list, zio, zio->io_allocator);
+ }
+
+ if (error != 0) {
+ zfs_dbgmsg("%s: metaslab allocation failure: zio %px, "
"size %llu, error %d", spa_name(spa), zio, zio->io_size,
error);
if (error == ENOSPC && zio->io_size > SPA_MINBLOCKSIZE)
zio->io_error = error;
}
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
-static int
+static zio_t *
zio_dva_free(zio_t *zio)
{
metaslab_free(zio->io_spa, zio->io_bp, zio->io_txg, B_FALSE);
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
-static int
+static zio_t *
zio_dva_claim(zio_t *zio)
{
int error;
if (error)
zio->io_error = error;
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
/*
static void
zio_dva_unallocate(zio_t *zio, zio_gang_node_t *gn, blkptr_t *bp)
{
- int g;
-
ASSERT(bp->blk_birth == zio->io_txg || BP_IS_HOLE(bp));
ASSERT(zio->io_bp_override == NULL);
metaslab_free(zio->io_spa, bp, bp->blk_birth, B_TRUE);
if (gn != NULL) {
- for (g = 0; g < SPA_GBH_NBLKPTRS; g++) {
+ for (int g = 0; g < SPA_GBH_NBLKPTRS; g++) {
zio_dva_unallocate(zio, gn->gn_child[g],
&gn->gn_gbh->zg_blkptr[g]);
}
* 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, uint64_t size,
- boolean_t use_slog)
+zio_alloc_zil(spa_t *spa, objset_t *os, uint64_t txg, blkptr_t *new_bp,
+ uint64_t size, boolean_t *slog)
{
int error = 1;
+ zio_alloc_list_t io_alloc_list;
ASSERT(txg > spa_syncing_txg(spa));
+ metaslab_trace_init(&io_alloc_list);
+
/*
- * 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.
+ * Block pointer fields are useful to metaslabs for stats and debugging.
+ * Fill in the obvious ones before calling into metaslab_alloc().
*/
- if (use_slog) {
- error = metaslab_alloc(spa, spa_log_class(spa), size,
- new_bp, 1, txg, NULL,
- METASLAB_FASTWRITE | METASLAB_GANG_AVOID);
- }
+ BP_SET_TYPE(new_bp, DMU_OT_INTENT_LOG);
+ BP_SET_PSIZE(new_bp, size);
+ BP_SET_LEVEL(new_bp, 0);
- if (error) {
+ /*
+ * When allocating a zil block, we don't have information about
+ * the final destination of the block except the objset it's part
+ * of, so we just hash the objset ID to pick the allocator to get
+ * some parallelism.
+ */
+ error = metaslab_alloc(spa, spa_log_class(spa), size, new_bp, 1,
+ txg, NULL, METASLAB_FASTWRITE, &io_alloc_list, NULL,
+ cityhash4(0, 0, 0, os->os_dsl_dataset->ds_object) %
+ spa->spa_alloc_count);
+ if (error == 0) {
+ *slog = TRUE;
+ } else {
error = metaslab_alloc(spa, spa_normal_class(spa), size,
- new_bp, 1, txg, NULL,
- METASLAB_FASTWRITE);
+ new_bp, 1, txg, NULL, METASLAB_FASTWRITE,
+ &io_alloc_list, NULL, cityhash4(0, 0, 0,
+ os->os_dsl_dataset->ds_object) % spa->spa_alloc_count);
+ if (error == 0)
+ *slog = FALSE;
}
+ metaslab_trace_fini(&io_alloc_list);
if (error == 0) {
BP_SET_LSIZE(new_bp, size);
BP_SET_LEVEL(new_bp, 0);
BP_SET_DEDUP(new_bp, 0);
BP_SET_BYTEORDER(new_bp, ZFS_HOST_BYTEORDER);
- }
- return (error);
-}
+ /*
+ * encrypted blocks will require an IV and salt. We generate
+ * these now since we will not be rewriting the bp at
+ * rewrite time.
+ */
+ if (os->os_encrypted) {
+ uint8_t iv[ZIO_DATA_IV_LEN];
+ uint8_t salt[ZIO_DATA_SALT_LEN];
-/*
- * Free an intent log block.
- */
-void
-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));
+ BP_SET_CRYPT(new_bp, B_TRUE);
+ VERIFY0(spa_crypt_get_salt(spa,
+ dmu_objset_id(os), salt));
+ VERIFY0(zio_crypt_generate_iv(iv));
- zio_free(spa, txg, bp);
+ zio_crypt_encode_params_bp(new_bp, salt, iv);
+ }
+ } else {
+ zfs_dbgmsg("%s: zil block allocation failure: "
+ "size %llu, error %d", spa_name(spa), size, error);
+ }
+
+ return (error);
}
/*
* Read and write to physical devices
* ==========================================================================
*/
-static int
+
+/*
+ * Issue an I/O to the underlying vdev. Typically the issue pipeline
+ * stops after this stage and will resume upon I/O completion.
+ * However, there are instances where the vdev layer may need to
+ * continue the pipeline when an I/O was not issued. Since the I/O
+ * that was sent to the vdev layer might be different than the one
+ * currently active in the pipeline (see vdev_queue_io()), we explicitly
+ * force the underlying vdev layers to call either zio_execute() or
+ * zio_interrupt() to ensure that the pipeline continues with the correct I/O.
+ */
+static zio_t *
zio_vdev_io_start(zio_t *zio)
{
vdev_t *vd = zio->io_vd;
uint64_t align;
spa_t *spa = zio->io_spa;
+ zio->io_delay = 0;
+
ASSERT(zio->io_error == 0);
ASSERT(zio->io_child_error[ZIO_CHILD_VDEV] == 0);
/*
* The mirror_ops handle multiple DVAs in a single BP.
*/
- return (vdev_mirror_ops.vdev_op_io_start(zio));
+ vdev_mirror_ops.vdev_op_io_start(zio);
+ return (NULL);
}
- /*
- * We keep track of time-sensitive I/Os so that the scan thread
- * can quickly react to certain workloads. In particular, we care
- * about non-scrubbing, top-level reads and writes with the following
- * characteristics:
- * - synchronous writes of user data to non-slog devices
- * - any reads of user data
- * When these conditions are met, adjust the timestamp of spa_last_io
- * which allows the scan thread to adjust its workload accordingly.
- */
- if (!(zio->io_flags & ZIO_FLAG_SCAN_THREAD) && zio->io_bp != NULL &&
- vd == vd->vdev_top && !vd->vdev_islog &&
- zio->io_bookmark.zb_objset != DMU_META_OBJSET &&
- zio->io_txg != spa_syncing_txg(spa)) {
- uint64_t old = spa->spa_last_io;
- uint64_t new = ddi_get_lbolt64();
- if (old != new)
- (void) atomic_cas_64(&spa->spa_last_io, old, new);
+ ASSERT3P(zio->io_logical, !=, zio);
+ if (zio->io_type == ZIO_TYPE_WRITE) {
+ ASSERT(spa->spa_trust_config);
+
+ /*
+ * Note: the code can handle other kinds of writes,
+ * but we don't expect them.
+ */
+ if (zio->io_vd->vdev_removing) {
+ ASSERT(zio->io_flags &
+ (ZIO_FLAG_PHYSICAL | ZIO_FLAG_SELF_HEAL |
+ ZIO_FLAG_RESILVER | ZIO_FLAG_INDUCE_DAMAGE));
+ }
}
align = 1ULL << vd->vdev_top->vdev_ashift;
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);
+ abd_t *abuf = abd_alloc_sametype(zio->io_abd, asize);
ASSERT(vd == vd->vdev_top);
if (zio->io_type == ZIO_TYPE_WRITE) {
- bcopy(zio->io_data, abuf, zio->io_size);
- bzero(abuf + zio->io_size, asize - zio->io_size);
+ abd_copy(abuf, zio->io_abd, zio->io_size);
+ abd_zero_off(abuf, zio->io_size, asize - zio->io_size);
}
zio_push_transform(zio, abuf, asize, asize, zio_subblock);
}
* If this is a repair I/O, and there's no self-healing involved --
* that is, we're just resilvering what we expect to resilver --
* then don't do the I/O unless zio's txg is actually in vd's DTL.
- * This prevents spurious resilvering with nested replication.
- * For example, given a mirror of mirrors, (A+B)+(C+D), if only
- * A is out of date, we'll read from C+D, then use the data to
- * resilver A+B -- but we don't actually want to resilver B, just A.
- * The top-level mirror has no way to know this, so instead we just
- * discard unnecessary repairs as we work our way down the vdev tree.
- * The same logic applies to any form of nested replication:
- * ditto + mirror, RAID-Z + replacing, etc. This covers them all.
+ * This prevents spurious resilvering.
+ *
+ * There are a few ways that we can end up creating these spurious
+ * resilver i/os:
+ *
+ * 1. A resilver i/o will be issued if any DVA in the BP has a
+ * dirty DTL. The mirror code will issue resilver writes to
+ * each DVA, including the one(s) that are not on vdevs with dirty
+ * DTLs.
+ *
+ * 2. With nested replication, which happens when we have a
+ * "replacing" or "spare" vdev that's a child of a mirror or raidz.
+ * For example, given mirror(replacing(A+B), C), it's likely that
+ * only A is out of date (it's the new device). In this case, we'll
+ * read from C, then use the data to resilver A+B -- but we don't
+ * actually want to resilver B, just A. The top-level mirror has no
+ * way to know this, so instead we just discard unnecessary repairs
+ * as we work our way down the vdev tree.
+ *
+ * 3. ZTEST also creates mirrors of mirrors, mirrors of raidz, etc.
+ * The same logic applies to any form of nested replication: ditto
+ * + mirror, RAID-Z + replacing, etc.
+ *
+ * However, indirect vdevs point off to other vdevs which may have
+ * DTL's, so we never bypass them. The child i/os on concrete vdevs
+ * will be properly bypassed instead.
*/
if ((zio->io_flags & ZIO_FLAG_IO_REPAIR) &&
!(zio->io_flags & ZIO_FLAG_SELF_HEAL) &&
zio->io_txg != 0 && /* not a delegated i/o */
+ vd->vdev_ops != &vdev_indirect_ops &&
!vdev_dtl_contains(vd, DTL_PARTIAL, zio->io_txg, 1)) {
ASSERT(zio->io_type == ZIO_TYPE_WRITE);
zio_vdev_io_bypass(zio);
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
- if (vd->vdev_ops->vdev_op_leaf &&
- (zio->io_type == ZIO_TYPE_READ || zio->io_type == ZIO_TYPE_WRITE)) {
+ if (vd->vdev_ops->vdev_op_leaf && (zio->io_type == ZIO_TYPE_READ ||
+ zio->io_type == ZIO_TYPE_WRITE || zio->io_type == ZIO_TYPE_TRIM)) {
if (zio->io_type == ZIO_TYPE_READ && vdev_cache_read(zio))
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
if ((zio = vdev_queue_io(zio)) == NULL)
- return (ZIO_PIPELINE_STOP);
+ return (NULL);
if (!vdev_accessible(vd, zio)) {
zio->io_error = SET_ERROR(ENXIO);
zio_interrupt(zio);
- return (ZIO_PIPELINE_STOP);
+ return (NULL);
}
+ zio->io_delay = gethrtime();
}
- return (vd->vdev_ops->vdev_op_io_start(zio));
+ vd->vdev_ops->vdev_op_io_start(zio);
+ return (NULL);
}
-static int
+static zio_t *
zio_vdev_io_done(zio_t *zio)
{
vdev_t *vd = zio->io_vd;
vdev_ops_t *ops = vd ? vd->vdev_ops : &vdev_mirror_ops;
boolean_t unexpected_error = B_FALSE;
- if (zio_wait_for_children(zio, ZIO_CHILD_VDEV, ZIO_WAIT_DONE))
- return (ZIO_PIPELINE_STOP);
+ if (zio_wait_for_children(zio, ZIO_CHILD_VDEV_BIT, ZIO_WAIT_DONE)) {
+ return (NULL);
+ }
+
+ ASSERT(zio->io_type == ZIO_TYPE_READ ||
+ zio->io_type == ZIO_TYPE_WRITE || zio->io_type == ZIO_TYPE_TRIM);
- ASSERT(zio->io_type == ZIO_TYPE_READ || zio->io_type == ZIO_TYPE_WRITE);
+ if (zio->io_delay)
+ zio->io_delay = gethrtime() - zio->io_delay;
if (vd != NULL && vd->vdev_ops->vdev_op_leaf) {
vdev_cache_write(zio);
if (zio_injection_enabled && zio->io_error == 0)
- zio->io_error = zio_handle_device_injection(vd,
- zio, EIO);
+ zio->io_error = zio_handle_device_injections(vd, zio,
+ EIO, EILSEQ);
if (zio_injection_enabled && zio->io_error == 0)
zio->io_error = zio_handle_label_injection(zio, EIO);
- if (zio->io_error) {
+ if (zio->io_error && zio->io_type != ZIO_TYPE_TRIM) {
if (!vdev_accessible(vd, zio)) {
zio->io_error = SET_ERROR(ENXIO);
} else {
if (unexpected_error)
VERIFY(vdev_probe(vd, zio) == NULL);
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
+}
+
+/*
+ * This function is used to change the priority of an existing zio that is
+ * currently in-flight. This is used by the arc to upgrade priority in the
+ * event that a demand read is made for a block that is currently queued
+ * as a scrub or async read IO. Otherwise, the high priority read request
+ * would end up having to wait for the lower priority IO.
+ */
+void
+zio_change_priority(zio_t *pio, zio_priority_t priority)
+{
+ zio_t *cio, *cio_next;
+ zio_link_t *zl = NULL;
+
+ ASSERT3U(priority, <, ZIO_PRIORITY_NUM_QUEUEABLE);
+
+ if (pio->io_vd != NULL && pio->io_vd->vdev_ops->vdev_op_leaf) {
+ vdev_queue_change_io_priority(pio, priority);
+ } else {
+ pio->io_priority = priority;
+ }
+
+ mutex_enter(&pio->io_lock);
+ for (cio = zio_walk_children(pio, &zl); cio != NULL; cio = cio_next) {
+ cio_next = zio_walk_children(pio, &zl);
+ zio_change_priority(cio, priority);
+ }
+ mutex_exit(&pio->io_lock);
}
/*
*/
static void
zio_vsd_default_cksum_finish(zio_cksum_report_t *zcr,
- const void *good_buf)
+ const abd_t *good_buf)
{
/* no processing needed */
zfs_ereport_finish_checksum(zcr, good_buf, zcr->zcr_cbdata, B_FALSE);
void
zio_vsd_default_cksum_report(zio_t *zio, zio_cksum_report_t *zcr, void *ignored)
{
- void *buf = zio_buf_alloc(zio->io_size);
+ void *abd = abd_alloc_sametype(zio->io_abd, zio->io_size);
- bcopy(zio->io_data, buf, zio->io_size);
+ abd_copy(abd, zio->io_abd, zio->io_size);
zcr->zcr_cbinfo = zio->io_size;
- zcr->zcr_cbdata = buf;
+ zcr->zcr_cbdata = abd;
zcr->zcr_finish = zio_vsd_default_cksum_finish;
- zcr->zcr_free = zio_buf_free;
+ zcr->zcr_free = zio_abd_free;
}
-static int
+static zio_t *
zio_vdev_io_assess(zio_t *zio)
{
vdev_t *vd = zio->io_vd;
- if (zio_wait_for_children(zio, ZIO_CHILD_VDEV, ZIO_WAIT_DONE))
- return (ZIO_PIPELINE_STOP);
+ if (zio_wait_for_children(zio, ZIO_CHILD_VDEV_BIT, ZIO_WAIT_DONE)) {
+ return (NULL);
+ }
if (vd == NULL && !(zio->io_flags & ZIO_FLAG_CONFIG_WRITER))
spa_config_exit(zio->io_spa, SCL_ZIO, zio);
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);
+ return (NULL);
}
/*
vd->vdev_cant_write = B_TRUE;
}
+ /*
+ * If a cache flush returns ENOTSUP or ENOTTY, we know that no future
+ * attempts will ever succeed. In this case we set a persistent
+ * boolean flag so that we don't bother with it in the future.
+ */
+ if ((zio->io_error == ENOTSUP || zio->io_error == ENOTTY) &&
+ zio->io_type == ZIO_TYPE_IOCTL &&
+ zio->io_cmd == DKIOCFLUSHWRITECACHE && vd != NULL)
+ vd->vdev_nowritecache = B_TRUE;
+
if (zio->io_error)
zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
zio->io_physdone(zio->io_logical);
}
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
void
zio->io_stage = ZIO_STAGE_VDEV_IO_ASSESS >> 1;
}
+/*
+ * ==========================================================================
+ * Encrypt and store encryption parameters
+ * ==========================================================================
+ */
+
+
+/*
+ * This function is used for ZIO_STAGE_ENCRYPT. It is responsible for
+ * managing the storage of encryption parameters and passing them to the
+ * lower-level encryption functions.
+ */
+static zio_t *
+zio_encrypt(zio_t *zio)
+{
+ zio_prop_t *zp = &zio->io_prop;
+ spa_t *spa = zio->io_spa;
+ blkptr_t *bp = zio->io_bp;
+ uint64_t psize = BP_GET_PSIZE(bp);
+ uint64_t dsobj = zio->io_bookmark.zb_objset;
+ dmu_object_type_t ot = BP_GET_TYPE(bp);
+ void *enc_buf = NULL;
+ abd_t *eabd = NULL;
+ uint8_t salt[ZIO_DATA_SALT_LEN];
+ uint8_t iv[ZIO_DATA_IV_LEN];
+ uint8_t mac[ZIO_DATA_MAC_LEN];
+ boolean_t no_crypt = B_FALSE;
+
+ /* the root zio already encrypted the data */
+ if (zio->io_child_type == ZIO_CHILD_GANG)
+ return (zio);
+
+ /* only ZIL blocks are re-encrypted on rewrite */
+ if (!IO_IS_ALLOCATING(zio) && ot != DMU_OT_INTENT_LOG)
+ return (zio);
+
+ if (!(zp->zp_encrypt || BP_IS_ENCRYPTED(bp))) {
+ BP_SET_CRYPT(bp, B_FALSE);
+ return (zio);
+ }
+
+ /* if we are doing raw encryption set the provided encryption params */
+ if (zio->io_flags & ZIO_FLAG_RAW_ENCRYPT) {
+ ASSERT0(BP_GET_LEVEL(bp));
+ BP_SET_CRYPT(bp, B_TRUE);
+ BP_SET_BYTEORDER(bp, zp->zp_byteorder);
+ if (ot != DMU_OT_OBJSET)
+ zio_crypt_encode_mac_bp(bp, zp->zp_mac);
+
+ /* dnode blocks must be written out in the provided byteorder */
+ if (zp->zp_byteorder != ZFS_HOST_BYTEORDER &&
+ ot == DMU_OT_DNODE) {
+ void *bswap_buf = zio_buf_alloc(psize);
+ abd_t *babd = abd_get_from_buf(bswap_buf, psize);
+
+ ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF);
+ abd_copy_to_buf(bswap_buf, zio->io_abd, psize);
+ dmu_ot_byteswap[DMU_OT_BYTESWAP(ot)].ob_func(bswap_buf,
+ psize);
+
+ abd_take_ownership_of_buf(babd, B_TRUE);
+ zio_push_transform(zio, babd, psize, psize, NULL);
+ }
+
+ if (DMU_OT_IS_ENCRYPTED(ot))
+ zio_crypt_encode_params_bp(bp, zp->zp_salt, zp->zp_iv);
+ return (zio);
+ }
+
+ /* indirect blocks only maintain a cksum of the lower level MACs */
+ if (BP_GET_LEVEL(bp) > 0) {
+ BP_SET_CRYPT(bp, B_TRUE);
+ VERIFY0(zio_crypt_do_indirect_mac_checksum_abd(B_TRUE,
+ zio->io_orig_abd, BP_GET_LSIZE(bp), BP_SHOULD_BYTESWAP(bp),
+ mac));
+ zio_crypt_encode_mac_bp(bp, mac);
+ return (zio);
+ }
+
+ /*
+ * Objset blocks are a special case since they have 2 256-bit MACs
+ * embedded within them.
+ */
+ if (ot == DMU_OT_OBJSET) {
+ ASSERT0(DMU_OT_IS_ENCRYPTED(ot));
+ ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF);
+ BP_SET_CRYPT(bp, B_TRUE);
+ VERIFY0(spa_do_crypt_objset_mac_abd(B_TRUE, spa, dsobj,
+ zio->io_abd, psize, BP_SHOULD_BYTESWAP(bp)));
+ return (zio);
+ }
+
+ /* unencrypted object types are only authenticated with a MAC */
+ if (!DMU_OT_IS_ENCRYPTED(ot)) {
+ BP_SET_CRYPT(bp, B_TRUE);
+ VERIFY0(spa_do_crypt_mac_abd(B_TRUE, spa, dsobj,
+ zio->io_abd, psize, mac));
+ zio_crypt_encode_mac_bp(bp, mac);
+ return (zio);
+ }
+
+ /*
+ * Later passes of sync-to-convergence may decide to rewrite data
+ * in place to avoid more disk reallocations. This presents a problem
+ * for encryption because this constitutes rewriting the new data with
+ * the same encryption key and IV. However, this only applies to blocks
+ * in the MOS (particularly the spacemaps) and we do not encrypt the
+ * MOS. We assert that the zio is allocating or an intent log write
+ * to enforce this.
+ */
+ ASSERT(IO_IS_ALLOCATING(zio) || ot == DMU_OT_INTENT_LOG);
+ ASSERT(BP_GET_LEVEL(bp) == 0 || ot == DMU_OT_INTENT_LOG);
+ ASSERT(spa_feature_is_active(spa, SPA_FEATURE_ENCRYPTION));
+ ASSERT3U(psize, !=, 0);
+
+ enc_buf = zio_buf_alloc(psize);
+ eabd = abd_get_from_buf(enc_buf, psize);
+ abd_take_ownership_of_buf(eabd, B_TRUE);
+
+ /*
+ * For an explanation of what encryption parameters are stored
+ * where, see the block comment in zio_crypt.c.
+ */
+ if (ot == DMU_OT_INTENT_LOG) {
+ zio_crypt_decode_params_bp(bp, salt, iv);
+ } else {
+ BP_SET_CRYPT(bp, B_TRUE);
+ }
+
+ /* Perform the encryption. This should not fail */
+ VERIFY0(spa_do_crypt_abd(B_TRUE, spa, &zio->io_bookmark,
+ BP_GET_TYPE(bp), BP_GET_DEDUP(bp), BP_SHOULD_BYTESWAP(bp),
+ salt, iv, mac, psize, zio->io_abd, eabd, &no_crypt));
+
+ /* encode encryption metadata into the bp */
+ if (ot == DMU_OT_INTENT_LOG) {
+ /*
+ * ZIL blocks store the MAC in the embedded checksum, so the
+ * transform must always be applied.
+ */
+ zio_crypt_encode_mac_zil(enc_buf, mac);
+ zio_push_transform(zio, eabd, psize, psize, NULL);
+ } else {
+ BP_SET_CRYPT(bp, B_TRUE);
+ zio_crypt_encode_params_bp(bp, salt, iv);
+ zio_crypt_encode_mac_bp(bp, mac);
+
+ if (no_crypt) {
+ ASSERT3U(ot, ==, DMU_OT_DNODE);
+ abd_free(eabd);
+ } else {
+ zio_push_transform(zio, eabd, psize, psize, NULL);
+ }
+ }
+
+ return (zio);
+}
+
/*
* ==========================================================================
* Generate and verify checksums
* ==========================================================================
*/
-static int
+static zio_t *
zio_checksum_generate(zio_t *zio)
{
blkptr_t *bp = zio->io_bp;
checksum = zio->io_prop.zp_checksum;
if (checksum == ZIO_CHECKSUM_OFF)
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
ASSERT(checksum == ZIO_CHECKSUM_LABEL);
} else {
}
}
- zio_checksum_compute(zio, checksum, zio->io_data, zio->io_size);
+ zio_checksum_compute(zio, checksum, zio->io_abd, zio->io_size);
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
-static int
+static zio_t *
zio_checksum_verify(zio_t *zio)
{
zio_bad_cksum_t info;
* We're either verifying a label checksum, or nothing at all.
*/
if (zio->io_prop.zp_checksum == ZIO_CHECKSUM_OFF)
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
ASSERT(zio->io_prop.zp_checksum == ZIO_CHECKSUM_LABEL);
}
if ((error = zio_checksum_error(zio, &info)) != 0) {
zio->io_error = error;
- if (!(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
+ if (error == ECKSUM &&
+ !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
+ mutex_enter(&zio->io_vd->vdev_stat_lock);
+ zio->io_vd->vdev_stat.vs_checksum_errors++;
+ mutex_exit(&zio->io_vd->vdev_stat_lock);
+
zfs_ereport_start_checksum(zio->io_spa,
- zio->io_vd, zio, zio->io_offset,
- zio->io_size, NULL, &info);
+ zio->io_vd, &zio->io_bookmark, zio,
+ zio->io_offset, zio->io_size, NULL, &info);
}
}
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
/*
* ==========================================================================
* Error rank. Error are ranked in the order 0, ENXIO, ECKSUM, EIO, other.
* An error of 0 indicates success. ENXIO indicates whole-device failure,
- * which may be transient (e.g. unplugged) or permament. ECKSUM and EIO
+ * which may be transient (e.g. unplugged) or permanent. 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.
* ==========================================================================
* I/O completion
* ==========================================================================
*/
-static int
+static zio_t *
zio_ready(zio_t *zio)
{
blkptr_t *bp = zio->io_bp;
zio_t *pio, *pio_next;
+ zio_link_t *zl = NULL;
- 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_wait_for_children(zio, ZIO_CHILD_GANG_BIT | ZIO_CHILD_DDT_BIT,
+ ZIO_WAIT_READY)) {
+ return (NULL);
+ }
if (zio->io_ready) {
ASSERT(IO_IS_ALLOCATING(zio));
if (bp != NULL && bp != &zio->io_bp_copy)
zio->io_bp_copy = *bp;
- if (zio->io_error)
+ if (zio->io_error != 0) {
zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
+ if (zio->io_flags & ZIO_FLAG_IO_ALLOCATING) {
+ ASSERT(IO_IS_ALLOCATING(zio));
+ ASSERT(zio->io_priority == ZIO_PRIORITY_ASYNC_WRITE);
+ ASSERT(zio->io_metaslab_class != NULL);
+
+ /*
+ * We were unable to allocate anything, unreserve and
+ * issue the next I/O to allocate.
+ */
+ metaslab_class_throttle_unreserve(
+ zio->io_metaslab_class, zio->io_prop.zp_copies,
+ zio->io_allocator, zio);
+ zio_allocate_dispatch(zio->io_spa, zio->io_allocator);
+ }
+ }
+
mutex_enter(&zio->io_lock);
zio->io_state[ZIO_WAIT_READY] = 1;
- pio = zio_walk_parents(zio);
+ pio = zio_walk_parents(zio, &zl);
mutex_exit(&zio->io_lock);
/*
* all parents must wait for us to be done before they can be done.
*/
for (; pio != NULL; pio = pio_next) {
- pio_next = zio_walk_parents(zio);
- zio_notify_parent(pio, zio, ZIO_WAIT_READY);
+ pio_next = zio_walk_parents(zio, &zl);
+ zio_notify_parent(pio, zio, ZIO_WAIT_READY, NULL);
}
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);
+ ASSERT((uintptr_t)zio->io_abd < SPA_MAXBLOCKSIZE);
zio->io_pipeline &= ~ZIO_VDEV_IO_STAGES;
}
}
zio->io_spa->spa_syncing_txg == zio->io_txg)
zio_handle_ignored_writes(zio);
- return (ZIO_PIPELINE_CONTINUE);
+ return (zio);
}
-static int
+/*
+ * Update the allocation throttle accounting.
+ */
+static void
+zio_dva_throttle_done(zio_t *zio)
+{
+ ASSERTV(zio_t *lio = zio->io_logical);
+ zio_t *pio = zio_unique_parent(zio);
+ vdev_t *vd = zio->io_vd;
+ int flags = METASLAB_ASYNC_ALLOC;
+
+ ASSERT3P(zio->io_bp, !=, NULL);
+ ASSERT3U(zio->io_type, ==, ZIO_TYPE_WRITE);
+ ASSERT3U(zio->io_priority, ==, ZIO_PRIORITY_ASYNC_WRITE);
+ ASSERT3U(zio->io_child_type, ==, ZIO_CHILD_VDEV);
+ ASSERT(vd != NULL);
+ ASSERT3P(vd, ==, vd->vdev_top);
+ ASSERT(zio_injection_enabled || !(zio->io_flags & ZIO_FLAG_IO_RETRY));
+ ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REPAIR));
+ ASSERT(zio->io_flags & ZIO_FLAG_IO_ALLOCATING);
+ ASSERT(!(lio->io_flags & ZIO_FLAG_IO_REWRITE));
+ ASSERT(!(lio->io_orig_flags & ZIO_FLAG_NODATA));
+
+ /*
+ * Parents of gang children can have two flavors -- ones that
+ * allocated the gang header (will have ZIO_FLAG_IO_REWRITE set)
+ * and ones that allocated the constituent blocks. The allocation
+ * throttle needs to know the allocating parent zio so we must find
+ * it here.
+ */
+ if (pio->io_child_type == ZIO_CHILD_GANG) {
+ /*
+ * If our parent is a rewrite gang child then our grandparent
+ * would have been the one that performed the allocation.
+ */
+ if (pio->io_flags & ZIO_FLAG_IO_REWRITE)
+ pio = zio_unique_parent(pio);
+ flags |= METASLAB_GANG_CHILD;
+ }
+
+ ASSERT(IO_IS_ALLOCATING(pio));
+ ASSERT3P(zio, !=, zio->io_logical);
+ ASSERT(zio->io_logical != NULL);
+ ASSERT(!(zio->io_flags & ZIO_FLAG_IO_REPAIR));
+ ASSERT0(zio->io_flags & ZIO_FLAG_NOPWRITE);
+ ASSERT(zio->io_metaslab_class != NULL);
+
+ mutex_enter(&pio->io_lock);
+ metaslab_group_alloc_decrement(zio->io_spa, vd->vdev_id, pio, flags,
+ pio->io_allocator, B_TRUE);
+ mutex_exit(&pio->io_lock);
+
+ metaslab_class_throttle_unreserve(zio->io_metaslab_class, 1,
+ pio->io_allocator, pio);
+
+ /*
+ * Call into the pipeline to see if there is more work that
+ * needs to be done. If there is work to be done it will be
+ * dispatched to another taskq thread.
+ */
+ zio_allocate_dispatch(zio->io_spa, pio->io_allocator);
+}
+
+static zio_t *
zio_done(zio_t *zio)
{
+ /*
+ * Always attempt to keep stack usage minimal here since
+ * we can be called recursively up to 19 levels deep.
+ */
+ const uint64_t psize = zio->io_size;
zio_t *pio, *pio_next;
- int c, w;
+ zio_link_t *zl = NULL;
/*
* If our children haven't all completed,
* wait for them and then repeat this pipeline stage.
*/
- 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 (zio_wait_for_children(zio, ZIO_CHILD_ALL_BITS, ZIO_WAIT_DONE)) {
+ return (NULL);
+ }
- for (c = 0; c < ZIO_CHILD_TYPES; c++)
- for (w = 0; w < ZIO_WAIT_TYPES; w++)
+ /*
+ * If the allocation throttle is enabled, then update the accounting.
+ * We only track child I/Os that are part of an allocating async
+ * write. We must do this since the allocation is performed
+ * by the logical I/O but the actual write is done by child I/Os.
+ */
+ if (zio->io_flags & ZIO_FLAG_IO_ALLOCATING &&
+ zio->io_child_type == ZIO_CHILD_VDEV) {
+ ASSERT(zio->io_metaslab_class != NULL);
+ ASSERT(zio->io_metaslab_class->mc_alloc_throttle_enabled);
+ zio_dva_throttle_done(zio);
+ }
+
+ /*
+ * If the allocation throttle is enabled, verify that
+ * we have decremented the refcounts for every I/O that was throttled.
+ */
+ if (zio->io_flags & ZIO_FLAG_IO_ALLOCATING) {
+ ASSERT(zio->io_type == ZIO_TYPE_WRITE);
+ ASSERT(zio->io_priority == ZIO_PRIORITY_ASYNC_WRITE);
+ ASSERT(zio->io_bp != NULL);
+
+ metaslab_group_alloc_verify(zio->io_spa, zio->io_bp, zio,
+ zio->io_allocator);
+ VERIFY(zfs_refcount_not_held(
+ &zio->io_metaslab_class->mc_alloc_slots[zio->io_allocator],
+ zio));
+ }
+
+
+ for (int c = 0; c < ZIO_CHILD_TYPES; c++)
+ for (int w = 0; w < ZIO_WAIT_TYPES; w++)
ASSERT(zio->io_children[c][w] == 0);
if (zio->io_bp != NULL && !BP_IS_EMBEDDED(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(zio->io_bp));
ASSERT3U(zio->io_prop.zp_copies, <=,
BP_GET_NDVAS(zio->io_bp));
ASSERT(BP_COUNT_GANG(zio->io_bp) == 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(zio->io_size, align);
- char *abuf = zio->io_data;
+ uint64_t asize = P2ROUNDUP(psize, align);
+ abd_t *adata = zio->io_abd;
- if (asize != zio->io_size) {
- abuf = zio_buf_alloc(asize);
- bcopy(zio->io_data, abuf, zio->io_size);
- bzero(abuf+zio->io_size, asize-zio->io_size);
+ if (asize != psize) {
+ adata = abd_alloc(asize, B_TRUE);
+ abd_copy(adata, zio->io_abd, psize);
+ abd_zero_off(adata, psize, asize - psize);
}
zio->io_cksum_report = zcr->zcr_next;
zcr->zcr_next = NULL;
- zcr->zcr_finish(zcr, abuf);
+ zcr->zcr_finish(zcr, adata);
zfs_ereport_free_checksum(zcr);
- if (asize != zio->io_size)
- zio_buf_free(abuf, asize);
+ if (asize != psize)
+ abd_free(adata);
}
}
zio_pop_transforms(zio); /* note: may set zio->io_error */
- vdev_stat_update(zio, zio->io_size);
+ vdev_stat_update(zio, psize);
/*
* 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_delay >= MSEC2NSEC(zio_slow_io_ms)) {
+ if (zio->io_vd != NULL && !vdev_is_dead(zio->io_vd)) {
+ /*
+ * We want to only increment our slow IO counters if
+ * the IO is valid (i.e. not if the drive is removed).
+ *
+ * zfs_ereport_post() will also do these checks, but
+ * it can also ratelimit and have other failures, so we
+ * need to increment the slow_io counters independent
+ * of it.
+ */
+ if (zfs_ereport_is_valid(FM_EREPORT_ZFS_DELAY,
+ zio->io_spa, zio->io_vd, zio)) {
+ mutex_enter(&zio->io_vd->vdev_stat_lock);
+ zio->io_vd->vdev_stat.vs_slow_ios++;
+ mutex_exit(&zio->io_vd->vdev_stat_lock);
+
+ zfs_ereport_post(FM_EREPORT_ZFS_DELAY,
+ zio->io_spa, zio->io_vd, &zio->io_bookmark,
+ zio, 0, 0);
+ }
+ }
}
if (zio->io_error) {
* device is currently unavailable.
*/
if (zio->io_error != ECKSUM && zio->io_vd != NULL &&
- !vdev_is_dead(zio->io_vd))
+ !vdev_is_dead(zio->io_vd)) {
+ mutex_enter(&zio->io_vd->vdev_stat_lock);
+ if (zio->io_type == ZIO_TYPE_READ) {
+ zio->io_vd->vdev_stat.vs_read_errors++;
+ } else if (zio->io_type == ZIO_TYPE_WRITE) {
+ zio->io_vd->vdev_stat.vs_write_errors++;
+ }
+ mutex_exit(&zio->io_vd->vdev_stat_lock);
+
zfs_ereport_post(FM_EREPORT_ZFS_IO, zio->io_spa,
- zio->io_vd, zio, 0, 0);
+ zio->io_vd, &zio->io_bookmark, zio, 0, 0);
+ }
if ((zio->io_error == EIO || !(zio->io_flags &
(ZIO_FLAG_SPECULATIVE | ZIO_FLAG_DONT_PROPAGATE))) &&
* For logical I/O requests, tell the SPA to log the
* error and generate a logical data ereport.
*/
- spa_log_error(zio->io_spa, zio);
+ spa_log_error(zio->io_spa, &zio->io_bookmark);
zfs_ereport_post(FM_EREPORT_ZFS_DATA, zio->io_spa,
- NULL, zio, 0, 0);
+ NULL, &zio->io_bookmark, zio, 0, 0);
}
}
*/
if ((zio->io_flags & ZIO_FLAG_GODFATHER) &&
(zio->io_reexecute & ZIO_REEXECUTE_SUSPEND))
- zio->io_reexecute = 0;
+ zio->io_reexecute &= ~ZIO_REEXECUTE_SUSPEND;
if (zio->io_reexecute) {
/*
* trouble (e.g. suspended). This allows "The Godfather"
* I/O to return status without blocking.
*/
- for (pio = zio_walk_parents(zio); pio != NULL; pio = pio_next) {
- zio_link_t *zl = zio->io_walk_link;
- pio_next = zio_walk_parents(zio);
+ zl = NULL;
+ for (pio = zio_walk_parents(zio, &zl); pio != NULL;
+ pio = pio_next) {
+ zio_link_t *remove_zl = zl;
+ pio_next = zio_walk_parents(zio, &zl);
if ((pio->io_flags & ZIO_FLAG_GODFATHER) &&
(zio->io_reexecute & ZIO_REEXECUTE_SUSPEND)) {
- zio_remove_child(pio, zio, zl);
- zio_notify_parent(pio, zio, ZIO_WAIT_DONE);
+ zio_remove_child(pio, zio, remove_zl);
+ /*
+ * This is a rare code path, so we don't
+ * bother with "next_to_execute".
+ */
+ zio_notify_parent(pio, zio, ZIO_WAIT_DONE,
+ NULL);
}
}
*/
ASSERT(!(zio->io_flags & ZIO_FLAG_GODFATHER));
zio->io_flags |= ZIO_FLAG_DONT_PROPAGATE;
- zio_notify_parent(pio, zio, ZIO_WAIT_DONE);
+ /*
+ * This is a rare code path, so we don't bother with
+ * "next_to_execute".
+ */
+ zio_notify_parent(pio, zio, ZIO_WAIT_DONE, NULL);
} else if (zio->io_reexecute & ZIO_REEXECUTE_SUSPEND) {
/*
* We'd fail again if we reexecuted now, so suspend
* until conditions improve (e.g. device comes online).
*/
- zio_suspend(zio->io_spa, zio);
+ zio_suspend(zio->io_spa, zio, ZIO_SUSPEND_IOERR);
} else {
/*
* Reexecution is potentially a huge amount of work.
(task_func_t *)zio_reexecute, zio, 0,
&zio->io_tqent);
}
- return (ZIO_PIPELINE_STOP);
+ return (NULL);
}
ASSERT(zio->io_child_count == 0);
zio->io_state[ZIO_WAIT_DONE] = 1;
mutex_exit(&zio->io_lock);
- for (pio = zio_walk_parents(zio); pio != NULL; pio = pio_next) {
- zio_link_t *zl = zio->io_walk_link;
- pio_next = zio_walk_parents(zio);
- zio_remove_child(pio, zio, zl);
- zio_notify_parent(pio, zio, ZIO_WAIT_DONE);
+ /*
+ * We are done executing this zio. We may want to execute a parent
+ * next. See the comment in zio_notify_parent().
+ */
+ zio_t *next_to_execute = NULL;
+ zl = NULL;
+ for (pio = zio_walk_parents(zio, &zl); pio != NULL; pio = pio_next) {
+ zio_link_t *remove_zl = zl;
+ pio_next = zio_walk_parents(zio, &zl);
+ zio_remove_child(pio, zio, remove_zl);
+ zio_notify_parent(pio, zio, ZIO_WAIT_DONE, &next_to_execute);
}
if (zio->io_waiter != NULL) {
zio_destroy(zio);
}
- return (ZIO_PIPELINE_STOP);
+ return (next_to_execute);
}
/*
static zio_pipe_stage_t *zio_pipeline[] = {
NULL,
zio_read_bp_init,
+ zio_write_bp_init,
zio_free_bp_init,
zio_issue_async,
- zio_write_bp_init,
+ zio_write_compress,
+ zio_encrypt,
zio_checksum_generate,
zio_nop_write,
zio_ddt_read_start,
zio_ddt_free,
zio_gang_assemble,
zio_gang_issue,
+ zio_dva_throttle,
zio_dva_allocate,
zio_dva_free,
zio_dva_claim,
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));
+/*
+ * Compare two zbookmark_phys_t's to see which we would reach first in a
+ * pre-order traversal of the object tree.
+ *
+ * This is simple in every case aside from the meta-dnode object. For all other
+ * objects, we traverse them in order (object 1 before object 2, and so on).
+ * However, all of these objects are traversed while traversing object 0, since
+ * the data it points to is the list of objects. Thus, we need to convert to a
+ * canonical representation so we can compare meta-dnode bookmarks to
+ * non-meta-dnode bookmarks.
+ *
+ * We do this by calculating "equivalents" for each field of the zbookmark.
+ * zbookmarks outside of the meta-dnode use their own object and level, and
+ * calculate the level 0 equivalent (the first L0 blkid that is contained in the
+ * blocks this bookmark refers to) by multiplying their blkid by their span
+ * (the number of L0 blocks contained within one block at their level).
+ * zbookmarks inside the meta-dnode calculate their object equivalent
+ * (which is L0equiv * dnodes per data block), use 0 for their L0equiv, and use
+ * level + 1<<31 (any value larger than a level could ever be) for their level.
+ * This causes them to always compare before a bookmark in their object
+ * equivalent, compare appropriately to bookmarks in other objects, and to
+ * compare appropriately to other bookmarks in the meta-dnode.
+ */
+int
+zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2, uint8_t ibs2,
+ const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2)
+{
+ /*
+ * These variables represent the "equivalent" values for the zbookmark,
+ * after converting zbookmarks inside the meta dnode to their
+ * normal-object equivalents.
+ */
+ uint64_t zb1obj, zb2obj;
+ uint64_t zb1L0, zb2L0;
+ uint64_t zb1level, zb2level;
+
+ if (zb1->zb_object == zb2->zb_object &&
+ zb1->zb_level == zb2->zb_level &&
+ zb1->zb_blkid == zb2->zb_blkid)
+ return (0);
- zb2thisobj = zb2->zb_object ? zb2->zb_object :
- zb2->zb_blkid << (DNODE_BLOCK_SHIFT - DNODE_SHIFT);
+ /*
+ * BP_SPANB calculates the span in blocks.
+ */
+ zb1L0 = (zb1->zb_blkid) * BP_SPANB(ibs1, zb1->zb_level);
+ zb2L0 = (zb2->zb_blkid) * BP_SPANB(ibs2, zb2->zb_level);
if (zb1->zb_object == DMU_META_DNODE_OBJECT) {
- uint64_t nextobj = zb1nextL0 *
- (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT) >> DNODE_SHIFT;
- return (nextobj <= zb2thisobj);
+ zb1obj = zb1L0 * (dbss1 << (SPA_MINBLOCKSHIFT - DNODE_SHIFT));
+ zb1L0 = 0;
+ zb1level = zb1->zb_level + COMPARE_META_LEVEL;
+ } else {
+ zb1obj = zb1->zb_object;
+ zb1level = zb1->zb_level;
}
- if (zb1->zb_object < zb2thisobj)
- return (B_TRUE);
- if (zb1->zb_object > zb2thisobj)
- return (B_FALSE);
- if (zb2->zb_object == DMU_META_DNODE_OBJECT)
+ if (zb2->zb_object == DMU_META_DNODE_OBJECT) {
+ zb2obj = zb2L0 * (dbss2 << (SPA_MINBLOCKSHIFT - DNODE_SHIFT));
+ zb2L0 = 0;
+ zb2level = zb2->zb_level + COMPARE_META_LEVEL;
+ } else {
+ zb2obj = zb2->zb_object;
+ zb2level = zb2->zb_level;
+ }
+
+ /* Now that we have a canonical representation, do the comparison. */
+ if (zb1obj != zb2obj)
+ return (zb1obj < zb2obj ? -1 : 1);
+ else if (zb1L0 != zb2L0)
+ return (zb1L0 < zb2L0 ? -1 : 1);
+ else if (zb1level != zb2level)
+ return (zb1level > zb2level ? -1 : 1);
+ /*
+ * This can (theoretically) happen if the bookmarks have the same object
+ * and level, but different blkids, if the block sizes are not the same.
+ * There is presently no way to change the indirect block sizes
+ */
+ return (0);
+}
+
+/*
+ * This function checks the following: given that last_block is the place that
+ * our traversal stopped last time, does that guarantee that we've visited
+ * every node under subtree_root? Therefore, we can't just use the raw output
+ * of zbookmark_compare. We have to pass in a modified version of
+ * subtree_root; by incrementing the block id, and then checking whether
+ * last_block is before or equal to that, we can tell whether or not having
+ * visited last_block implies that all of subtree_root's children have been
+ * visited.
+ */
+boolean_t
+zbookmark_subtree_completed(const dnode_phys_t *dnp,
+ const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block)
+{
+ zbookmark_phys_t mod_zb = *subtree_root;
+ mod_zb.zb_blkid++;
+ ASSERT(last_block->zb_level == 0);
+
+ /* The objset_phys_t isn't before anything. */
+ if (dnp == NULL)
return (B_FALSE);
- return (zb1nextL0 <= zb2->zb_blkid);
-}
-
-#if defined(_KERNEL) && defined(HAVE_SPL)
-/* Fault injection */
-EXPORT_SYMBOL(zio_injection_enabled);
-EXPORT_SYMBOL(zio_inject_fault);
-EXPORT_SYMBOL(zio_inject_list_next);
-EXPORT_SYMBOL(zio_clear_fault);
-EXPORT_SYMBOL(zio_handle_fault_injection);
-EXPORT_SYMBOL(zio_handle_device_injection);
-EXPORT_SYMBOL(zio_handle_label_injection);
-EXPORT_SYMBOL(zio_type_name);
-module_param(zio_bulk_flags, int, 0644);
-MODULE_PARM_DESC(zio_bulk_flags, "Additional flags to pass to bulk buffers");
+ /*
+ * We pass in 1ULL << (DNODE_BLOCK_SHIFT - SPA_MINBLOCKSHIFT) for the
+ * data block size in sectors, because that variable is only used if
+ * the bookmark refers to a block in the meta-dnode. Since we don't
+ * know without examining it what object it refers to, and there's no
+ * harm in passing in this value in other cases, we always pass it in.
+ *
+ * We pass in 0 for the indirect block size shift because zb2 must be
+ * level 0. The indirect block size is only used to calculate the span
+ * of the bookmark, but since the bookmark must be level 0, the span is
+ * always 1, so the math works out.
+ *
+ * If you make changes to how the zbookmark_compare code works, be sure
+ * to make sure that this code still works afterwards.
+ */
+ return (zbookmark_compare(dnp->dn_datablkszsec, dnp->dn_indblkshift,
+ 1ULL << (DNODE_BLOCK_SHIFT - SPA_MINBLOCKSHIFT), 0, &mod_zb,
+ last_block) <= 0);
+}
-module_param(zio_delay_max, int, 0644);
-MODULE_PARM_DESC(zio_delay_max, "Max zio millisec delay before posting event");
+#if defined(_KERNEL)
+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_slow_io_ms, int, 0644);
+MODULE_PARM_DESC(zio_slow_io_ms,
+ "Max I/O completion time (milliseconds) before marking it as slow");
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_rewrite, int, 0644);
MODULE_PARM_DESC(zfs_sync_pass_rewrite,
"Rewrite new bps starting in this pass");
+
+module_param(zio_dva_throttle_enabled, int, 0644);
+MODULE_PARM_DESC(zio_dva_throttle_enabled,
+ "Throttle block allocations in the ZIO pipeline");
+
+module_param(zio_deadman_log_all, int, 0644);
+MODULE_PARM_DESC(zio_deadman_log_all,
+ "Log all slow ZIOs, not just those with vdevs");
#endif
projects / mirror_zfs.git / blobdiff