-http://dlc.sun.com/osol/on/downloads/b105/on-src.tar.bz2
+http://dlc.sun.com/osol/on/downloads/b108/on-src.tar.bz2
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
boolean_t scripted = B_FALSE;
static char default_fields[] =
"name,used,available,referenced,mountpoint";
- int types = ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
+ int types = ZFS_TYPE_DATASET;
boolean_t types_specified = B_FALSE;
char *fields = NULL;
list_cbdata_t cb = { 0 };
bzero(&flags, sizeof (recvflags_t));
/* check options */
- while ((c = getopt(argc, argv, ":dnvF")) != -1) {
+ while ((c = getopt(argc, argv, ":dnuvF")) != -1) {
switch (c) {
case 'd':
flags.isprefix = B_TRUE;
case 'n':
flags.dryrun = B_TRUE;
break;
+ case 'u':
+ flags.nomount = B_TRUE;
+ break;
case 'v':
flags.verbose = B_TRUE;
break;
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
verify((zhp = zpool_open_canfail(g_zfs, name)) != NULL);
- if (zpool_enable_datasets(zhp, mntopts, 0) != 0) {
+ if (zpool_get_state(zhp) != POOL_STATE_UNAVAIL &&
+ zpool_enable_datasets(zhp, mntopts, 0) != 0) {
zpool_close(zhp);
return (1);
}
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
ZPOOL_STATUS_HOSTID_MISMATCH, /* last accessed by another system */
ZPOOL_STATUS_IO_FAILURE_WAIT, /* failed I/O, failmode 'wait' */
ZPOOL_STATUS_IO_FAILURE_CONTINUE, /* failed I/O, failmode 'continue' */
+ ZPOOL_STATUS_BAD_LOG, /* cannot read log chain(s) */
+
+ /*
+ * These faults have no corresponding message ID. At the time we are
+ * checking the status, the original reason for the FMA fault (I/O or
+ * checksum errors) has been lost.
+ */
ZPOOL_STATUS_FAULTED_DEV_R, /* faulted device with replicas */
ZPOOL_STATUS_FAULTED_DEV_NR, /* faulted device with no replicas */
- ZPOOL_STATUS_BAD_LOG, /* cannot read log chain(s) */
/*
* The following are not faults per se, but still an error possibly
/* byteswap flag is used internally; callers need not specify */
int byteswap : 1;
+
+ /* do not mount file systems as they are extracted (private) */
+ int nomount : 1;
} recvflags_t;
extern int zfs_receive(libzfs_handle_t *, const char *, recvflags_t,
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* And mount all the datasets, keeping track of which ones
- * succeeded or failed. By using zfs_alloc(), the good pointer
- * will always be non-NULL.
+ * succeeded or failed.
*/
- good = zfs_alloc(zhp->zpool_hdl, cb.cb_used * sizeof (int));
+ if ((good = zfs_alloc(zhp->zpool_hdl,
+ cb.cb_used * sizeof (int))) == NULL)
+ goto out;
+
ret = 0;
for (i = 0; i < cb.cb_used; i++) {
if (zfs_mount(cb.cb_datasets[i], mntopts, flags) != 0)
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
uint_t vsc;
if (zpool_get_state(zhp) == POOL_STATE_UNAVAIL) {
- if (prop == ZPOOL_PROP_NAME)
+ switch (prop) {
+ case ZPOOL_PROP_NAME:
(void) strlcpy(buf, zpool_get_name(zhp), len);
- else if (prop == ZPOOL_PROP_HEALTH)
+ break;
+
+ case ZPOOL_PROP_HEALTH:
(void) strlcpy(buf, "FAULTED", len);
- else
+ break;
+
+ case ZPOOL_PROP_GUID:
+ intval = zpool_get_prop_int(zhp, prop, &src);
+ (void) snprintf(buf, len, "%llu", intval);
+ break;
+
+ case ZPOOL_PROP_ALTROOT:
+ case ZPOOL_PROP_CACHEFILE:
+ if (zhp->zpool_props != NULL ||
+ zpool_get_all_props(zhp) == 0) {
+ (void) strlcpy(buf,
+ zpool_get_prop_string(zhp, prop, &src),
+ len);
+ if (srctype != NULL)
+ *srctype = src;
+ return (0);
+ }
+ /* FALLTHROUGH */
+ default:
(void) strlcpy(buf, "-", len);
+ break;
+ }
+
+ if (srctype != NULL)
+ *srctype = src;
return (0);
}
dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
zhp->zpool_name);
- if (zhp->zpool_props == NULL && zpool_get_all_props(zhp))
- return (zfs_error(zhp->zpool_hdl, EZFS_POOLPROPS, errbuf));
-
if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
return (no_memory(zhp->zpool_hdl));
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
err = zfs_receive_impl(hdl, tosnap, flags, infd, stream_avl, &top_zfs);
- if (err == 0 && top_zfs) {
+ if (err == 0 && !flags.nomount && top_zfs) {
zfs_handle_t *zhp;
prop_changelist_t *clp;
if ((ret = realloc(ptr, newsize)) == NULL) {
(void) no_memory(hdl);
- free(ptr);
return (NULL);
}
return (-1);
}
- /* Rely on stroll() to process the numeric portion. */
+ /* Rely on stroull() to process the numeric portion. */
errno = 0;
- *num = strtoll(value, &end, 10);
+ *num = strtoull(value, &end, 10);
/*
* Check for ERANGE, which indicates that the value is too large to fit
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Hostname information
*/
-extern char hw_serial[];
+extern char hw_serial[]; /* for userland-emulated hostid access */
extern int ddi_strtoul(const char *str, char **nptr, int base,
unsigned long *result);
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/zfs_context.h>
#include <sys/zmod.h>
#include <sys/utsname.h>
+#include <sys/systeminfo.h>
/*
* Emulation of kernel services in userland.
uint64_t physmem;
vnode_t *rootdir = (vnode_t *)0xabcd1234;
-char hw_serial[11];
+char hw_serial[HW_HOSTID_LEN];
struct utsname utsname = {
"userland", "libzpool", "1", "1", "na"
dprintf("physmem = %llu pages (%.2f GB)\n", physmem,
(double)physmem * sysconf(_SC_PAGE_SIZE) / (1ULL << 30));
- snprintf(hw_serial, sizeof (hw_serial), "%ld", gethostid());
+ (void) snprintf(hw_serial, sizeof (hw_serial), "%ld", gethostid());
VERIFY((random_fd = open("/dev/random", O_RDONLY)) != -1);
VERIFY((urandom_fd = open("/dev/urandom", O_RDONLY)) != -1);
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* number of seconds before growing cache again */
static int arc_grow_retry = 60;
+/* shift of arc_c for calculating both min and max arc_p */
+static int arc_p_min_shift = 4;
+
+/* log2(fraction of arc to reclaim) */
+static int arc_shrink_shift = 5;
+
/*
* minimum lifespan of a prefetch block in clock ticks
* (initialized in arc_init())
uint64_t zfs_arc_min;
uint64_t zfs_arc_meta_limit = 0;
int zfs_mdcomp_disable = 0;
+int zfs_arc_grow_retry = 0;
+int zfs_arc_shrink_shift = 0;
+int zfs_arc_p_min_shift = 0;
/*
* Note that buffers can be in one of 6 states:
kstat_named_t arcstat_c_max;
kstat_named_t arcstat_size;
kstat_named_t arcstat_hdr_size;
+ kstat_named_t arcstat_data_size;
+ kstat_named_t arcstat_other_size;
kstat_named_t arcstat_l2_hits;
kstat_named_t arcstat_l2_misses;
kstat_named_t arcstat_l2_feeds;
kstat_named_t arcstat_l2_rw_clash;
+ kstat_named_t arcstat_l2_read_bytes;
+ kstat_named_t arcstat_l2_write_bytes;
kstat_named_t arcstat_l2_writes_sent;
kstat_named_t arcstat_l2_writes_done;
kstat_named_t arcstat_l2_writes_error;
{ "c_max", KSTAT_DATA_UINT64 },
{ "size", KSTAT_DATA_UINT64 },
{ "hdr_size", KSTAT_DATA_UINT64 },
+ { "data_size", KSTAT_DATA_UINT64 },
+ { "other_size", KSTAT_DATA_UINT64 },
{ "l2_hits", KSTAT_DATA_UINT64 },
{ "l2_misses", KSTAT_DATA_UINT64 },
{ "l2_feeds", KSTAT_DATA_UINT64 },
{ "l2_rw_clash", KSTAT_DATA_UINT64 },
+ { "l2_read_bytes", KSTAT_DATA_UINT64 },
+ { "l2_write_bytes", KSTAT_DATA_UINT64 },
{ "l2_writes_sent", KSTAT_DATA_UINT64 },
{ "l2_writes_done", KSTAT_DATA_UINT64 },
{ "l2_writes_error", KSTAT_DATA_UINT64 },
/* immutable */
arc_buf_contents_t b_type;
uint64_t b_size;
- spa_t *b_spa;
+ uint64_t b_spa;
/* protected by arc state mutex */
arc_state_t *b_state;
static void arc_get_data_buf(arc_buf_t *buf);
static void arc_access(arc_buf_hdr_t *buf, kmutex_t *hash_lock);
static int arc_evict_needed(arc_buf_contents_t type);
-static void arc_evict_ghost(arc_state_t *state, spa_t *spa, int64_t bytes);
+static void arc_evict_ghost(arc_state_t *state, uint64_t spa, int64_t bytes);
#define GHOST_STATE(state) \
((state) == arc_mru_ghost || (state) == arc_mfu_ghost || \
#define HDR_IN_HASH_TABLE(hdr) ((hdr)->b_flags & ARC_IN_HASH_TABLE)
#define HDR_IO_IN_PROGRESS(hdr) ((hdr)->b_flags & ARC_IO_IN_PROGRESS)
#define HDR_IO_ERROR(hdr) ((hdr)->b_flags & ARC_IO_ERROR)
+#define HDR_PREFETCH(hdr) ((hdr)->b_flags & ARC_PREFETCH)
#define HDR_FREED_IN_READ(hdr) ((hdr)->b_flags & ARC_FREED_IN_READ)
#define HDR_BUF_AVAILABLE(hdr) ((hdr)->b_flags & ARC_BUF_AVAILABLE)
#define HDR_FREE_IN_PROGRESS(hdr) ((hdr)->b_flags & ARC_FREE_IN_PROGRESS)
*/
#define L2ARC_WRITE_SIZE (8 * 1024 * 1024) /* initial write max */
-#define L2ARC_HEADROOM 4 /* num of writes */
-#define L2ARC_FEED_SECS 1 /* caching interval */
+#define L2ARC_HEADROOM 2 /* num of writes */
+#define L2ARC_FEED_SECS 1 /* caching interval secs */
+#define L2ARC_FEED_MIN_MS 200 /* min caching interval ms */
#define l2arc_writes_sent ARCSTAT(arcstat_l2_writes_sent)
#define l2arc_writes_done ARCSTAT(arcstat_l2_writes_done)
uint64_t l2arc_write_boost = L2ARC_WRITE_SIZE; /* extra write during warmup */
uint64_t l2arc_headroom = L2ARC_HEADROOM; /* number of dev writes */
uint64_t l2arc_feed_secs = L2ARC_FEED_SECS; /* interval seconds */
+uint64_t l2arc_feed_min_ms = L2ARC_FEED_MIN_MS; /* min interval milliseconds */
boolean_t l2arc_noprefetch = B_TRUE; /* don't cache prefetch bufs */
+boolean_t l2arc_feed_again = B_TRUE; /* turbo warmup */
+boolean_t l2arc_norw = B_TRUE; /* no reads during writes */
/*
* L2ARC Internals
uint64_t l2ad_end; /* last addr on device */
uint64_t l2ad_evict; /* last addr eviction reached */
boolean_t l2ad_first; /* first sweep through */
+ boolean_t l2ad_writing; /* currently writing */
list_t *l2ad_buflist; /* buffer list */
list_node_t l2ad_node; /* device list node */
} l2arc_dev_t;
static void l2arc_hdr_stat_remove(void);
static uint64_t
-buf_hash(spa_t *spa, const dva_t *dva, uint64_t birth)
+buf_hash(uint64_t spa, const dva_t *dva, uint64_t birth)
{
- uintptr_t spav = (uintptr_t)spa;
uint8_t *vdva = (uint8_t *)dva;
uint64_t crc = -1ULL;
int i;
for (i = 0; i < sizeof (dva_t); i++)
crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ vdva[i]) & 0xFF];
- crc ^= (spav>>8) ^ birth;
+ crc ^= (spa>>8) ^ birth;
return (crc);
}
((buf)->b_birth == birth) && ((buf)->b_spa == spa)
static arc_buf_hdr_t *
-buf_hash_find(spa_t *spa, const dva_t *dva, uint64_t birth, kmutex_t **lockp)
+buf_hash_find(uint64_t spa, const dva_t *dva, uint64_t birth, kmutex_t **lockp)
{
uint64_t idx = BUF_HASH_INDEX(spa, dva, birth);
kmutex_t *hash_lock = BUF_HASH_LOCK(idx);
refcount_create(&buf->b_refcnt);
cv_init(&buf->b_cv, NULL, CV_DEFAULT, NULL);
mutex_init(&buf->b_freeze_lock, NULL, MUTEX_DEFAULT, NULL);
+ arc_space_consume(sizeof (arc_buf_hdr_t), ARC_SPACE_HDRS);
- ARCSTAT_INCR(arcstat_hdr_size, HDR_SIZE);
return (0);
}
bzero(buf, sizeof (arc_buf_t));
rw_init(&buf->b_lock, NULL, RW_DEFAULT, NULL);
+ arc_space_consume(sizeof (arc_buf_t), ARC_SPACE_HDRS);
+
return (0);
}
refcount_destroy(&buf->b_refcnt);
cv_destroy(&buf->b_cv);
mutex_destroy(&buf->b_freeze_lock);
-
- ARCSTAT_INCR(arcstat_hdr_size, -HDR_SIZE);
+ arc_space_return(sizeof (arc_buf_hdr_t), ARC_SPACE_HDRS);
}
/* ARGSUSED */
arc_buf_t *buf = vbuf;
rw_destroy(&buf->b_lock);
+ arc_space_return(sizeof (arc_buf_t), ARC_SPACE_HDRS);
}
/*
}
void
-arc_space_consume(uint64_t space)
+arc_space_consume(uint64_t space, arc_space_type_t type)
{
+ ASSERT(type >= 0 && type < ARC_SPACE_NUMTYPES);
+
+ switch (type) {
+ case ARC_SPACE_DATA:
+ ARCSTAT_INCR(arcstat_data_size, space);
+ break;
+ case ARC_SPACE_OTHER:
+ ARCSTAT_INCR(arcstat_other_size, space);
+ break;
+ case ARC_SPACE_HDRS:
+ ARCSTAT_INCR(arcstat_hdr_size, space);
+ break;
+ case ARC_SPACE_L2HDRS:
+ ARCSTAT_INCR(arcstat_l2_hdr_size, space);
+ break;
+ }
+
atomic_add_64(&arc_meta_used, space);
atomic_add_64(&arc_size, space);
}
void
-arc_space_return(uint64_t space)
+arc_space_return(uint64_t space, arc_space_type_t type)
{
+ ASSERT(type >= 0 && type < ARC_SPACE_NUMTYPES);
+
+ switch (type) {
+ case ARC_SPACE_DATA:
+ ARCSTAT_INCR(arcstat_data_size, -space);
+ break;
+ case ARC_SPACE_OTHER:
+ ARCSTAT_INCR(arcstat_other_size, -space);
+ break;
+ case ARC_SPACE_HDRS:
+ ARCSTAT_INCR(arcstat_hdr_size, -space);
+ break;
+ case ARC_SPACE_L2HDRS:
+ ARCSTAT_INCR(arcstat_l2_hdr_size, -space);
+ break;
+ }
+
ASSERT(arc_meta_used >= space);
if (arc_meta_max < arc_meta_used)
arc_meta_max = arc_meta_used;
ASSERT(BUF_EMPTY(hdr));
hdr->b_size = size;
hdr->b_type = type;
- hdr->b_spa = spa;
+ hdr->b_spa = spa_guid(spa);
hdr->b_state = arc_anon;
hdr->b_arc_access = 0;
buf = kmem_cache_alloc(buf_cache, KM_PUSHPAGE);
ASSERT(hdr->b_state == arc_mru || hdr->b_state == arc_mfu);
add_reference(hdr, hash_lock, tag);
+ DTRACE_PROBE1(arc__hit, arc_buf_hdr_t *, hdr);
arc_access(hdr, hash_lock);
mutex_exit(hash_lock);
ARCSTAT_BUMP(arcstat_hits);
if (type == ARC_BUFC_METADATA) {
arc_buf_data_free(buf->b_hdr, zio_buf_free,
buf->b_data, size);
- arc_space_return(size);
+ arc_space_return(size, ARC_SPACE_DATA);
} else {
ASSERT(type == ARC_BUFC_DATA);
arc_buf_data_free(buf->b_hdr,
zio_data_buf_free, buf->b_data, size);
+ ARCSTAT_INCR(arcstat_data_size, -size);
atomic_add_64(&arc_size, -size);
}
}
* It may also return without evicting as much space as requested.
*/
static void *
-arc_evict(arc_state_t *state, spa_t *spa, int64_t bytes, boolean_t recycle,
+arc_evict(arc_state_t *state, uint64_t spa, int64_t bytes, boolean_t recycle,
arc_buf_contents_t type)
{
arc_state_t *evicted_state;
* bytes. Destroy the buffers that are removed.
*/
static void
-arc_evict_ghost(arc_state_t *state, spa_t *spa, int64_t bytes)
+arc_evict_ghost(arc_state_t *state, uint64_t spa, int64_t bytes)
{
arc_buf_hdr_t *ab, *ab_prev;
list_t *list = &state->arcs_list[ARC_BUFC_DATA];
static void
arc_adjust(void)
{
- int64_t top_sz, mru_over, arc_over, todelete;
+ int64_t adjustment, delta;
+
+ /*
+ * Adjust MRU size
+ */
- top_sz = arc_anon->arcs_size + arc_mru->arcs_size + arc_meta_used;
+ adjustment = MIN(arc_size - arc_c,
+ arc_anon->arcs_size + arc_mru->arcs_size + arc_meta_used - arc_p);
- if (top_sz > arc_p && arc_mru->arcs_lsize[ARC_BUFC_DATA] > 0) {
- int64_t toevict =
- MIN(arc_mru->arcs_lsize[ARC_BUFC_DATA], top_sz - arc_p);
- (void) arc_evict(arc_mru, NULL, toevict, FALSE, ARC_BUFC_DATA);
- top_sz = arc_anon->arcs_size + arc_mru->arcs_size;
+ if (adjustment > 0 && arc_mru->arcs_lsize[ARC_BUFC_DATA] > 0) {
+ delta = MIN(arc_mru->arcs_lsize[ARC_BUFC_DATA], adjustment);
+ (void) arc_evict(arc_mru, NULL, delta, FALSE, ARC_BUFC_DATA);
+ adjustment -= delta;
}
- if (top_sz > arc_p && arc_mru->arcs_lsize[ARC_BUFC_METADATA] > 0) {
- int64_t toevict =
- MIN(arc_mru->arcs_lsize[ARC_BUFC_METADATA], top_sz - arc_p);
- (void) arc_evict(arc_mru, NULL, toevict, FALSE,
+ if (adjustment > 0 && arc_mru->arcs_lsize[ARC_BUFC_METADATA] > 0) {
+ delta = MIN(arc_mru->arcs_lsize[ARC_BUFC_METADATA], adjustment);
+ (void) arc_evict(arc_mru, NULL, delta, FALSE,
ARC_BUFC_METADATA);
- top_sz = arc_anon->arcs_size + arc_mru->arcs_size;
}
- mru_over = top_sz + arc_mru_ghost->arcs_size - arc_c;
+ /*
+ * Adjust MFU size
+ */
- if (mru_over > 0) {
- if (arc_mru_ghost->arcs_size > 0) {
- todelete = MIN(arc_mru_ghost->arcs_size, mru_over);
- arc_evict_ghost(arc_mru_ghost, NULL, todelete);
- }
+ adjustment = arc_size - arc_c;
+
+ if (adjustment > 0 && arc_mfu->arcs_lsize[ARC_BUFC_DATA] > 0) {
+ delta = MIN(adjustment, arc_mfu->arcs_lsize[ARC_BUFC_DATA]);
+ (void) arc_evict(arc_mfu, NULL, delta, FALSE, ARC_BUFC_DATA);
+ adjustment -= delta;
}
- if ((arc_over = arc_size - arc_c) > 0) {
- int64_t tbl_over;
+ if (adjustment > 0 && arc_mfu->arcs_lsize[ARC_BUFC_METADATA] > 0) {
+ int64_t delta = MIN(adjustment,
+ arc_mfu->arcs_lsize[ARC_BUFC_METADATA]);
+ (void) arc_evict(arc_mfu, NULL, delta, FALSE,
+ ARC_BUFC_METADATA);
+ }
- if (arc_mfu->arcs_lsize[ARC_BUFC_DATA] > 0) {
- int64_t toevict =
- MIN(arc_mfu->arcs_lsize[ARC_BUFC_DATA], arc_over);
- (void) arc_evict(arc_mfu, NULL, toevict, FALSE,
- ARC_BUFC_DATA);
- arc_over = arc_size - arc_c;
- }
+ /*
+ * Adjust ghost lists
+ */
- if (arc_over > 0 &&
- arc_mfu->arcs_lsize[ARC_BUFC_METADATA] > 0) {
- int64_t toevict =
- MIN(arc_mfu->arcs_lsize[ARC_BUFC_METADATA],
- arc_over);
- (void) arc_evict(arc_mfu, NULL, toevict, FALSE,
- ARC_BUFC_METADATA);
- }
+ adjustment = arc_mru->arcs_size + arc_mru_ghost->arcs_size - arc_c;
+
+ if (adjustment > 0 && arc_mru_ghost->arcs_size > 0) {
+ delta = MIN(arc_mru_ghost->arcs_size, adjustment);
+ arc_evict_ghost(arc_mru_ghost, NULL, delta);
+ }
- tbl_over = arc_size + arc_mru_ghost->arcs_size +
- arc_mfu_ghost->arcs_size - arc_c * 2;
+ adjustment =
+ arc_mru_ghost->arcs_size + arc_mfu_ghost->arcs_size - arc_c;
- if (tbl_over > 0 && arc_mfu_ghost->arcs_size > 0) {
- todelete = MIN(arc_mfu_ghost->arcs_size, tbl_over);
- arc_evict_ghost(arc_mfu_ghost, NULL, todelete);
- }
+ if (adjustment > 0 && arc_mfu_ghost->arcs_size > 0) {
+ delta = MIN(arc_mfu_ghost->arcs_size, adjustment);
+ arc_evict_ghost(arc_mfu_ghost, NULL, delta);
}
}
void
arc_flush(spa_t *spa)
{
+ uint64_t guid = 0;
+
+ if (spa)
+ guid = spa_guid(spa);
+
while (list_head(&arc_mru->arcs_list[ARC_BUFC_DATA])) {
- (void) arc_evict(arc_mru, spa, -1, FALSE, ARC_BUFC_DATA);
+ (void) arc_evict(arc_mru, guid, -1, FALSE, ARC_BUFC_DATA);
if (spa)
break;
}
while (list_head(&arc_mru->arcs_list[ARC_BUFC_METADATA])) {
- (void) arc_evict(arc_mru, spa, -1, FALSE, ARC_BUFC_METADATA);
+ (void) arc_evict(arc_mru, guid, -1, FALSE, ARC_BUFC_METADATA);
if (spa)
break;
}
while (list_head(&arc_mfu->arcs_list[ARC_BUFC_DATA])) {
- (void) arc_evict(arc_mfu, spa, -1, FALSE, ARC_BUFC_DATA);
+ (void) arc_evict(arc_mfu, guid, -1, FALSE, ARC_BUFC_DATA);
if (spa)
break;
}
while (list_head(&arc_mfu->arcs_list[ARC_BUFC_METADATA])) {
- (void) arc_evict(arc_mfu, spa, -1, FALSE, ARC_BUFC_METADATA);
+ (void) arc_evict(arc_mfu, guid, -1, FALSE, ARC_BUFC_METADATA);
if (spa)
break;
}
- arc_evict_ghost(arc_mru_ghost, spa, -1);
- arc_evict_ghost(arc_mfu_ghost, spa, -1);
+ arc_evict_ghost(arc_mru_ghost, guid, -1);
+ arc_evict_ghost(arc_mfu_ghost, guid, -1);
mutex_enter(&arc_reclaim_thr_lock);
arc_do_user_evicts();
ASSERT(spa || arc_eviction_list == NULL);
}
-int arc_shrink_shift = 5; /* log2(fraction of arc to reclaim) */
-
void
arc_shrink(void)
{
arc_adapt(int bytes, arc_state_t *state)
{
int mult;
+ uint64_t arc_p_min = (arc_c >> arc_p_min_shift);
if (state == arc_l2c_only)
return;
mult = ((arc_mru_ghost->arcs_size >= arc_mfu_ghost->arcs_size) ?
1 : (arc_mfu_ghost->arcs_size/arc_mru_ghost->arcs_size));
- arc_p = MIN(arc_c, arc_p + bytes * mult);
+ arc_p = MIN(arc_c - arc_p_min, arc_p + bytes * mult);
} else if (state == arc_mfu_ghost) {
+ uint64_t delta;
+
mult = ((arc_mfu_ghost->arcs_size >= arc_mru_ghost->arcs_size) ?
1 : (arc_mru_ghost->arcs_size/arc_mfu_ghost->arcs_size));
- arc_p = MAX(0, (int64_t)arc_p - bytes * mult);
+ delta = MIN(bytes * mult, arc_p);
+ arc_p = MAX(arc_p_min, arc_p - delta);
}
ASSERT((int64_t)arc_p >= 0);
if (!arc_evict_needed(type)) {
if (type == ARC_BUFC_METADATA) {
buf->b_data = zio_buf_alloc(size);
- arc_space_consume(size);
+ arc_space_consume(size, ARC_SPACE_DATA);
} else {
ASSERT(type == ARC_BUFC_DATA);
buf->b_data = zio_data_buf_alloc(size);
+ ARCSTAT_INCR(arcstat_data_size, size);
atomic_add_64(&arc_size, size);
}
goto out;
if (state == arc_mru || state == arc_anon) {
uint64_t mru_used = arc_anon->arcs_size + arc_mru->arcs_size;
- state = (arc_mfu->arcs_lsize[type] > 0 &&
+ state = (arc_mfu->arcs_lsize[type] >= size &&
arc_p > mru_used) ? arc_mfu : arc_mru;
} else {
/* MFU cases */
uint64_t mfu_space = arc_c - arc_p;
- state = (arc_mru->arcs_lsize[type] > 0 &&
+ state = (arc_mru->arcs_lsize[type] >= size &&
mfu_space > arc_mfu->arcs_size) ? arc_mru : arc_mfu;
}
if ((buf->b_data = arc_evict(state, NULL, size, TRUE, type)) == NULL) {
if (type == ARC_BUFC_METADATA) {
buf->b_data = zio_buf_alloc(size);
- arc_space_consume(size);
+ arc_space_consume(size, ARC_SPACE_DATA);
} else {
ASSERT(type == ARC_BUFC_DATA);
buf->b_data = zio_data_buf_alloc(size);
+ ARCSTAT_INCR(arcstat_data_size, size);
atomic_add_64(&arc_size, size);
}
ARCSTAT_BUMP(arcstat_recycle_miss);
* reason for it not to be found is if we were freed during the
* read.
*/
- found = buf_hash_find(zio->io_spa, &hdr->b_dva, hdr->b_birth,
+ found = buf_hash_find(hdr->b_spa, &hdr->b_dva, hdr->b_birth,
&hash_lock);
ASSERT((found == NULL && HDR_FREED_IN_READ(hdr) && hash_lock == NULL) ||
arc_buf_t *buf;
kmutex_t *hash_lock;
zio_t *rzio;
+ uint64_t guid = spa_guid(spa);
top:
- hdr = buf_hash_find(spa, BP_IDENTITY(bp), bp->blk_birth, &hash_lock);
+ hdr = buf_hash_find(guid, BP_IDENTITY(bp), bp->blk_birth, &hash_lock);
if (hdr && hdr->b_datacnt > 0) {
*arc_flags |= ARC_CACHED;
acb->acb_private = private;
if (pio != NULL)
acb->acb_zio_dummy = zio_null(pio,
- spa, NULL, NULL, zio_flags);
+ spa, NULL, NULL, NULL, zio_flags);
ASSERT(acb->acb_done != NULL);
acb->acb_next = hdr->b_acb;
arc_callback_t *acb;
vdev_t *vd = NULL;
daddr_t addr;
+ boolean_t devw = B_FALSE;
if (hdr == NULL) {
/* this block is not in the cache */
if (HDR_L2CACHE(hdr) && hdr->b_l2hdr != NULL &&
(vd = hdr->b_l2hdr->b_dev->l2ad_vdev) != NULL) {
+ devw = hdr->b_l2hdr->b_dev->l2ad_writing;
addr = hdr->b_l2hdr->b_daddr;
/*
* Lock out device removal.
demand, prefetch, hdr->b_type != ARC_BUFC_METADATA,
data, metadata, misses);
- if (vd != NULL) {
+ if (vd != NULL && l2arc_ndev != 0 && !(l2arc_norw && devw)) {
/*
* Read from the L2ARC if the following are true:
* 1. The L2ARC vdev was previously cached.
* 3. This buffer isn't currently writing to the L2ARC.
* 4. The L2ARC entry wasn't evicted, which may
* also have invalidated the vdev.
+ * 5. This isn't prefetch and l2arc_noprefetch is set.
*/
if (hdr->b_l2hdr != NULL &&
- !HDR_L2_WRITING(hdr) && !HDR_L2_EVICTED(hdr)) {
+ !HDR_L2_WRITING(hdr) && !HDR_L2_EVICTED(hdr) &&
+ !(l2arc_noprefetch && HDR_PREFETCH(hdr))) {
l2arc_read_callback_t *cb;
DTRACE_PROBE1(l2arc__hit, arc_buf_hdr_t *, hdr);
ZIO_FLAG_DONT_RETRY, B_FALSE);
DTRACE_PROBE2(l2arc__read, vdev_t *, vd,
zio_t *, rzio);
+ ARCSTAT_INCR(arcstat_l2_read_bytes, size);
if (*arc_flags & ARC_NOWAIT) {
zio_nowait(rzio);
ARCSTAT_BUMP(arcstat_l2_rw_clash);
spa_config_exit(spa, SCL_L2ARC, vd);
}
+ } else {
+ if (vd != NULL)
+ spa_config_exit(spa, SCL_L2ARC, vd);
+ if (l2arc_ndev != 0) {
+ DTRACE_PROBE1(l2arc__miss,
+ arc_buf_hdr_t *, hdr);
+ ARCSTAT_BUMP(arcstat_l2_misses);
+ }
}
rzio = zio_read(pio, spa, bp, buf->b_data, size,
{
arc_buf_hdr_t *hdr;
kmutex_t *hash_mtx;
+ uint64_t guid = spa_guid(spa);
int rc = 0;
- hdr = buf_hash_find(spa, BP_IDENTITY(bp), bp->blk_birth, &hash_mtx);
+ hdr = buf_hash_find(guid, BP_IDENTITY(bp), bp->blk_birth, &hash_mtx);
if (hdr && hdr->b_datacnt > 0 && !HDR_IO_IN_PROGRESS(hdr)) {
arc_buf_t *buf = hdr->b_buf;
arc_buf_hdr_t *nhdr;
arc_buf_t **bufp;
uint64_t blksz = hdr->b_size;
- spa_t *spa = hdr->b_spa;
+ uint64_t spa = hdr->b_spa;
arc_buf_contents_t type = hdr->b_type;
uint32_t flags = hdr->b_flags;
arc_buf_hdr_t *ab;
kmutex_t *hash_lock;
zio_t *zio;
+ uint64_t guid = spa_guid(spa);
/*
* If this buffer is in the cache, release it, so it
* can be re-used.
*/
- ab = buf_hash_find(spa, BP_IDENTITY(bp), bp->blk_birth, &hash_lock);
+ ab = buf_hash_find(guid, BP_IDENTITY(bp), bp->blk_birth, &hash_lock);
if (ab != NULL) {
/*
* The checksum of blocks to free is not always
if (arc_c_min < arc_meta_limit / 2 && zfs_arc_min == 0)
arc_c_min = arc_meta_limit / 2;
+ if (zfs_arc_grow_retry > 0)
+ arc_grow_retry = zfs_arc_grow_retry;
+
+ if (zfs_arc_shrink_shift > 0)
+ arc_shrink_shift = zfs_arc_shrink_shift;
+
+ if (zfs_arc_p_min_shift > 0)
+ arc_p_min_shift = zfs_arc_p_min_shift;
+
/* if kmem_flags are set, lets try to use less memory */
if (kmem_debugging())
arc_c = arc_c / 2;
*
* Tunables may be removed or added as future performance improvements are
* integrated, and also may become zpool properties.
+ *
+ * There are three key functions that control how the L2ARC warms up:
+ *
+ * l2arc_write_eligible() check if a buffer is eligible to cache
+ * l2arc_write_size() calculate how much to write
+ * l2arc_write_interval() calculate sleep delay between writes
+ *
+ * These three functions determine what to write, how much, and how quickly
+ * to send writes.
*/
+static boolean_t
+l2arc_write_eligible(uint64_t spa_guid, arc_buf_hdr_t *ab)
+{
+ /*
+ * A buffer is *not* eligible for the L2ARC if it:
+ * 1. belongs to a different spa.
+ * 2. has no attached buffer.
+ * 3. is already cached on the L2ARC.
+ * 4. has an I/O in progress (it may be an incomplete read).
+ * 5. is flagged not eligible (zfs property).
+ */
+ if (ab->b_spa != spa_guid || ab->b_buf == NULL || ab->b_l2hdr != NULL ||
+ HDR_IO_IN_PROGRESS(ab) || !HDR_L2CACHE(ab))
+ return (B_FALSE);
+
+ return (B_TRUE);
+}
+
+static uint64_t
+l2arc_write_size(l2arc_dev_t *dev)
+{
+ uint64_t size;
+
+ size = dev->l2ad_write;
+
+ if (arc_warm == B_FALSE)
+ size += dev->l2ad_boost;
+
+ return (size);
+
+}
+
+static clock_t
+l2arc_write_interval(clock_t began, uint64_t wanted, uint64_t wrote)
+{
+ clock_t interval, next;
+
+ /*
+ * If the ARC lists are busy, increase our write rate; if the
+ * lists are stale, idle back. This is achieved by checking
+ * how much we previously wrote - if it was more than half of
+ * what we wanted, schedule the next write much sooner.
+ */
+ if (l2arc_feed_again && wrote > (wanted / 2))
+ interval = (hz * l2arc_feed_min_ms) / 1000;
+ else
+ interval = hz * l2arc_feed_secs;
+
+ next = MAX(lbolt, MIN(lbolt + interval, began + interval));
+
+ return (next);
+}
+
static void
l2arc_hdr_stat_add(void)
{
* storage now. If there *is* a waiter, the caller must
* issue the i/o in a context where it's OK to block.
*/
- if (zio->io_waiter == NULL)
- zio_nowait(zio_read(zio->io_parent,
- cb->l2rcb_spa, &cb->l2rcb_bp,
+ if (zio->io_waiter == NULL) {
+ zio_t *pio = zio_unique_parent(zio);
+
+ ASSERT(!pio || pio->io_child_type == ZIO_CHILD_LOGICAL);
+
+ zio_nowait(zio_read(pio, cb->l2rcb_spa, &cb->l2rcb_bp,
buf->b_data, zio->io_size, arc_read_done, buf,
zio->io_priority, cb->l2rcb_flags, &cb->l2rcb_zb));
+ }
}
kmem_free(cb, sizeof (l2arc_read_callback_t));
* An ARC_L2_WRITING flag is set so that the L2ARC buffers are not valid
* for reading until they have completed writing.
*/
-static void
+static uint64_t
l2arc_write_buffers(spa_t *spa, l2arc_dev_t *dev, uint64_t target_sz)
{
arc_buf_hdr_t *ab, *ab_prev, *head;
boolean_t have_lock, full;
l2arc_write_callback_t *cb;
zio_t *pio, *wzio;
+ uint64_t guid = spa_guid(spa);
ASSERT(dev->l2ad_vdev != NULL);
break;
}
- if (ab->b_spa != spa) {
- mutex_exit(hash_lock);
- continue;
- }
-
- if (ab->b_l2hdr != NULL) {
- /*
- * Already in L2ARC.
- */
- mutex_exit(hash_lock);
- continue;
- }
-
- if (HDR_IO_IN_PROGRESS(ab) || !HDR_L2CACHE(ab)) {
+ if (!l2arc_write_eligible(guid, ab)) {
mutex_exit(hash_lock);
continue;
}
break;
}
- if (ab->b_buf == NULL) {
- DTRACE_PROBE1(l2arc__buf__null, void *, ab);
- mutex_exit(hash_lock);
- continue;
- }
-
if (pio == NULL) {
/*
* Insert a dummy header on the buflist so
if (pio == NULL) {
ASSERT3U(write_sz, ==, 0);
kmem_cache_free(hdr_cache, head);
- return;
+ return (0);
}
ASSERT3U(write_sz, <=, target_sz);
ARCSTAT_BUMP(arcstat_l2_writes_sent);
+ ARCSTAT_INCR(arcstat_l2_write_bytes, write_sz);
ARCSTAT_INCR(arcstat_l2_size, write_sz);
spa_l2cache_space_update(dev->l2ad_vdev, 0, write_sz);
dev->l2ad_first = B_FALSE;
}
+ dev->l2ad_writing = B_TRUE;
(void) zio_wait(pio);
+ dev->l2ad_writing = B_FALSE;
+
+ return (write_sz);
}
/*
callb_cpr_t cpr;
l2arc_dev_t *dev;
spa_t *spa;
- uint64_t size;
+ uint64_t size, wrote;
+ clock_t begin, next = lbolt;
CALLB_CPR_INIT(&cpr, &l2arc_feed_thr_lock, callb_generic_cpr, FTAG);
mutex_enter(&l2arc_feed_thr_lock);
while (l2arc_thread_exit == 0) {
- /*
- * Pause for l2arc_feed_secs seconds between writes.
- */
CALLB_CPR_SAFE_BEGIN(&cpr);
(void) cv_timedwait(&l2arc_feed_thr_cv, &l2arc_feed_thr_lock,
- lbolt + (hz * l2arc_feed_secs));
+ next);
CALLB_CPR_SAFE_END(&cpr, &l2arc_feed_thr_lock);
+ next = lbolt + hz;
/*
* Quick check for L2ARC devices.
continue;
}
mutex_exit(&l2arc_dev_mtx);
+ begin = lbolt;
/*
* This selects the next l2arc device to write to, and in
ARCSTAT_BUMP(arcstat_l2_feeds);
- size = dev->l2ad_write;
- if (arc_warm == B_FALSE)
- size += dev->l2ad_boost;
+ size = l2arc_write_size(dev);
/*
* Evict L2ARC buffers that will be overwritten.
/*
* Write ARC buffers.
*/
- l2arc_write_buffers(spa, dev, size);
+ wrote = l2arc_write_buffers(spa, dev, size);
+
+ /*
+ * Calculate interval between writes.
+ */
+ next = l2arc_write_interval(begin, size, wrote);
spa_config_exit(spa, SCL_L2ARC, dev);
}
adddev->l2ad_hand = adddev->l2ad_start;
adddev->l2ad_evict = adddev->l2ad_start;
adddev->l2ad_first = B_TRUE;
+ adddev->l2ad_writing = B_FALSE;
ASSERT3U(adddev->l2ad_write, >, 0);
/*
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
ASSERT3U(bonuslen, <=, db->db.db_size);
db->db.db_data = zio_buf_alloc(DN_MAX_BONUSLEN);
- arc_space_consume(DN_MAX_BONUSLEN);
+ arc_space_consume(DN_MAX_BONUSLEN, ARC_SPACE_OTHER);
if (bonuslen < DN_MAX_BONUSLEN)
bzero(db->db.db_data, DN_MAX_BONUSLEN);
bcopy(DN_BONUS(dn->dn_phys), db->db.db_data,
if (db->db_blkid == DB_BONUS_BLKID) {
/* Note that the data bufs here are zio_bufs */
dr->dt.dl.dr_data = zio_buf_alloc(DN_MAX_BONUSLEN);
- arc_space_consume(DN_MAX_BONUSLEN);
+ arc_space_consume(DN_MAX_BONUSLEN, ARC_SPACE_OTHER);
bcopy(db->db.db_data, dr->dt.dl.dr_data, DN_MAX_BONUSLEN);
} else if (refcount_count(&db->db_holds) > db->db_dirtycnt) {
int size = db->db.db_size;
ASSERT(db->db.db_data != NULL);
if (db->db_blkid == DB_BONUS_BLKID) {
zio_buf_free(db->db.db_data, DN_MAX_BONUSLEN);
- arc_space_return(DN_MAX_BONUSLEN);
+ arc_space_return(DN_MAX_BONUSLEN, ARC_SPACE_OTHER);
}
db->db.db_data = NULL;
db->db_state = DB_UNCACHED;
db->db.db_offset = DB_BONUS_BLKID;
db->db_state = DB_UNCACHED;
/* the bonus dbuf is not placed in the hash table */
- arc_space_consume(sizeof (dmu_buf_impl_t));
+ arc_space_consume(sizeof (dmu_buf_impl_t), ARC_SPACE_OTHER);
return (db);
} else {
int blocksize =
list_insert_head(&dn->dn_dbufs, db);
db->db_state = DB_UNCACHED;
mutex_exit(&dn->dn_dbufs_mtx);
- arc_space_consume(sizeof (dmu_buf_impl_t));
+ arc_space_consume(sizeof (dmu_buf_impl_t), ARC_SPACE_OTHER);
if (parent && parent != dn->dn_dbuf)
dbuf_add_ref(parent, db);
ASSERT(db->db_data_pending == NULL);
kmem_cache_free(dbuf_cache, db);
- arc_space_return(sizeof (dmu_buf_impl_t));
+ arc_space_return(sizeof (dmu_buf_impl_t), ARC_SPACE_OTHER);
}
void
bcopy(*datap, DN_BONUS(dn->dn_phys), dn->dn_phys->dn_bonuslen);
if (*datap != db->db.db_data) {
zio_buf_free(*datap, DN_MAX_BONUSLEN);
- arc_space_return(DN_MAX_BONUSLEN);
+ arc_space_return(DN_MAX_BONUSLEN, ARC_SPACE_OTHER);
}
db->db_data_pending = NULL;
drp = &db->db_last_dirty;
return (err);
}
+/* ARGSUSED */
+int
+dmu_objset_prefetch(char *name, void *arg)
+{
+ dsl_dataset_t *ds;
+
+ if (dsl_dataset_hold(name, FTAG, &ds))
+ return (0);
+
+ if (!BP_IS_HOLE(&ds->ds_phys->ds_bp)) {
+ mutex_enter(&ds->ds_opening_lock);
+ if (!dsl_dataset_get_user_ptr(ds)) {
+ uint32_t aflags = ARC_NOWAIT | ARC_PREFETCH;
+ zbookmark_t zb;
+
+ zb.zb_objset = ds->ds_object;
+ zb.zb_object = 0;
+ zb.zb_level = -1;
+ zb.zb_blkid = 0;
+
+ (void) arc_read_nolock(NULL, dsl_dataset_get_spa(ds),
+ &ds->ds_phys->ds_bp, NULL, NULL,
+ ZIO_PRIORITY_ASYNC_READ,
+ ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE,
+ &aflags, &zb);
+ }
+ mutex_exit(&ds->ds_opening_lock);
+ }
+
+ dsl_dataset_rele(ds, FTAG);
+ return (0);
+}
+
void
dmu_objset_set_user(objset_t *os, void *user_ptr)
{
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* currently allocated, want to be allocated */
dmu_tx_hold_bonus(tx, drro->drr_object);
/*
- * We may change blocksize, so need to
- * hold_write
+ * We may change blocksize and delete old content,
+ * so need to hold_write and hold_free.
*/
dmu_tx_hold_write(tx, drro->drr_object, 0, 1);
+ dmu_tx_hold_free(tx, drro->drr_object, 0, DMU_OBJECT_END);
err = dmu_tx_assign(tx, TXG_WAIT);
if (err) {
dmu_tx_abort(tx);
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
list_insert_head(&os->os_dnodes, dn);
mutex_exit(&os->os_lock);
- arc_space_consume(sizeof (dnode_t));
+ arc_space_consume(sizeof (dnode_t), ARC_SPACE_OTHER);
return (dn);
}
dn->dn_bonus = NULL;
}
kmem_cache_free(dnode_cache, dn);
- arc_space_return(sizeof (dnode_t));
+ arc_space_return(sizeof (dnode_t), ARC_SPACE_OTHER);
}
void
dnode_reallocate(dnode_t *dn, dmu_object_type_t ot, int blocksize,
dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
{
- int i, old_nblkptr;
+ int i, nblkptr;
dmu_buf_impl_t *db = NULL;
ASSERT3U(blocksize, >=, SPA_MINBLOCKSIZE);
dnode_free_range(dn, 0, -1ULL, tx);
}
+ nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT);
+
/* change blocksize */
rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
if (blocksize != dn->dn_datablksz &&
dnode_setdirty(dn, tx);
dn->dn_next_bonuslen[tx->tx_txg&TXG_MASK] = bonuslen;
dn->dn_next_blksz[tx->tx_txg&TXG_MASK] = blocksize;
+ if (dn->dn_nblkptr != nblkptr)
+ dn->dn_next_nblkptr[tx->tx_txg&TXG_MASK] = nblkptr;
rw_exit(&dn->dn_struct_rwlock);
if (db)
dbuf_rele(db, FTAG);
/* change bonus size and type */
mutex_enter(&dn->dn_mtx);
- old_nblkptr = dn->dn_nblkptr;
dn->dn_bonustype = bonustype;
dn->dn_bonuslen = bonuslen;
- dn->dn_nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT);
+ dn->dn_nblkptr = nblkptr;
dn->dn_checksum = ZIO_CHECKSUM_INHERIT;
dn->dn_compress = ZIO_COMPRESS_INHERIT;
ASSERT3U(dn->dn_nblkptr, <=, DN_MAX_NBLKPTR);
- /* XXX - for now, we can't make nblkptr smaller */
- ASSERT3U(dn->dn_nblkptr, >=, old_nblkptr);
-
- /* fix up the bonus db_size if dn_nblkptr has changed */
- if (dn->dn_bonus && dn->dn_bonuslen != old_nblkptr) {
+ /* fix up the bonus db_size */
+ if (dn->dn_bonus) {
dn->dn_bonus->db.db_size =
DN_MAX_BONUSLEN - (dn->dn_nblkptr-1) * sizeof (blkptr_t);
ASSERT(dn->dn_bonuslen <= dn->dn_bonus->db.db_size);
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
-#pragma ident "%Z%%M% %I% %E% SMI"
-
#include <sys/zfs_context.h>
#include <sys/dbuf.h>
#include <sys/dnode.h>
/* XXX shouldn't the phys already be zeroed? */
bzero(dnp, DNODE_CORE_SIZE);
dnp->dn_nlevels = 1;
+ dnp->dn_nblkptr = dn->dn_nblkptr;
}
- if (dn->dn_nblkptr > dnp->dn_nblkptr) {
- /* zero the new blkptrs we are gaining */
- bzero(dnp->dn_blkptr + dnp->dn_nblkptr,
- sizeof (blkptr_t) *
- (dn->dn_nblkptr - dnp->dn_nblkptr));
- }
dnp->dn_type = dn->dn_type;
dnp->dn_bonustype = dn->dn_bonustype;
dnp->dn_bonuslen = dn->dn_bonuslen;
- dnp->dn_nblkptr = dn->dn_nblkptr;
}
ASSERT(dnp->dn_nlevels > 1 ||
return;
}
+ if (dn->dn_next_nblkptr[txgoff]) {
+ /* this should only happen on a realloc */
+ ASSERT(dn->dn_allocated_txg == tx->tx_txg);
+ if (dn->dn_next_nblkptr[txgoff] > dnp->dn_nblkptr) {
+ /* zero the new blkptrs we are gaining */
+ bzero(dnp->dn_blkptr + dnp->dn_nblkptr,
+ sizeof (blkptr_t) *
+ (dn->dn_next_nblkptr[txgoff] - dnp->dn_nblkptr));
+#ifdef ZFS_DEBUG
+ } else {
+ int i;
+ ASSERT(dn->dn_next_nblkptr[txgoff] < dnp->dn_nblkptr);
+ /* the blkptrs we are losing better be unallocated */
+ for (i = dn->dn_next_nblkptr[txgoff];
+ i < dnp->dn_nblkptr; i++)
+ ASSERT(BP_IS_HOLE(&dnp->dn_blkptr[i]));
+#endif
+ }
+ mutex_enter(&dn->dn_mtx);
+ dnp->dn_nblkptr = dn->dn_next_nblkptr[txgoff];
+ dn->dn_next_nblkptr[txgoff] = 0;
+ mutex_exit(&dn->dn_mtx);
+ }
+
if (dn->dn_next_nlevels[txgoff]) {
dnode_increase_indirection(dn, tx);
dn->dn_next_nlevels[txgoff] = 0;
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
err = dsl_dir_open(oldname, FTAG, &dd, &tail);
if (err)
return (err);
+ /*
+ * If there are more than 2 references there may be holds
+ * hanging around that haven't been cleared out yet.
+ */
+ if (dmu_buf_refcount(dd->dd_dbuf) > 2)
+ txg_wait_synced(dd->dd_pool, 0);
if (tail == NULL) {
int delta = strlen(newname) - strlen(oldname);
dsl_dataset_t *ds = arg1;
uint64_t *reservationp = arg2;
uint64_t new_reservation = *reservationp;
- int64_t delta;
uint64_t unique;
- if (new_reservation > INT64_MAX)
- return (EOVERFLOW);
-
if (spa_version(ds->ds_dir->dd_pool->dp_spa) <
SPA_VERSION_REFRESERVATION)
return (ENOTSUP);
mutex_enter(&ds->ds_lock);
unique = dsl_dataset_unique(ds);
- delta = MAX(unique, new_reservation) - MAX(unique, ds->ds_reserved);
mutex_exit(&ds->ds_lock);
- if (delta > 0 &&
- delta > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE))
- return (ENOSPC);
- if (delta > 0 && ds->ds_quota > 0 &&
- new_reservation > ds->ds_quota)
- return (ENOSPC);
+ if (MAX(unique, new_reservation) > MAX(unique, ds->ds_reserved)) {
+ uint64_t delta = MAX(unique, new_reservation) -
+ MAX(unique, ds->ds_reserved);
+
+ if (delta > dsl_dir_space_available(ds->ds_dir, NULL, 0, TRUE))
+ return (ENOSPC);
+ if (ds->ds_quota > 0 &&
+ new_reservation > ds->ds_quota)
+ return (ENOSPC);
+ }
return (0);
}
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
uint64_t *reservationp = arg2;
uint64_t new_reservation = *reservationp;
uint64_t used, avail;
- int64_t delta;
-
- if (new_reservation > INT64_MAX)
- return (EOVERFLOW);
/*
* If we are doing the preliminary check in open context, the
mutex_enter(&dd->dd_lock);
used = dd->dd_phys->dd_used_bytes;
- delta = MAX(used, new_reservation) -
- MAX(used, dd->dd_phys->dd_reserved);
mutex_exit(&dd->dd_lock);
if (dd->dd_parent) {
avail = dsl_pool_adjustedsize(dd->dd_pool, B_FALSE) - used;
}
- if (delta > 0 && delta > avail)
- return (ENOSPC);
- if (delta > 0 && dd->dd_phys->dd_quota > 0 &&
- new_reservation > dd->dd_phys->dd_quota)
- return (ENOSPC);
+ if (MAX(used, new_reservation) > MAX(used, dd->dd_phys->dd_reserved)) {
+ uint64_t delta = MAX(used, new_reservation) -
+ MAX(used, dd->dd_phys->dd_reserved);
+
+ if (delta > avail)
+ return (ENOSPC);
+ if (dd->dd_phys->dd_quota > 0 &&
+ new_reservation > dd->dd_phys->dd_quota)
+ return (ENOSPC);
+ }
+
return (0);
}
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
ESC_ZFS_RESILVER_START);
dp->dp_scrub_max_txg = MIN(dp->dp_scrub_max_txg,
tx->tx_txg);
+ } else {
+ spa_event_notify(dp->dp_spa, NULL,
+ ESC_ZFS_SCRUB_START);
}
/* zero out the scrub stats in all vdev_stat_t's */
*/
vdev_dtl_reassess(dp->dp_spa->spa_root_vdev, tx->tx_txg,
*completep ? dp->dp_scrub_max_txg : 0, B_TRUE);
- if (dp->dp_scrub_min_txg && *completep)
- spa_event_notify(dp->dp_spa, NULL, ESC_ZFS_RESILVER_FINISH);
+ if (*completep)
+ spa_event_notify(dp->dp_spa, NULL, dp->dp_scrub_min_txg ?
+ ESC_ZFS_RESILVER_FINISH : ESC_ZFS_SCRUB_FINISH);
spa_errlog_rotate(dp->dp_spa);
/*
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#define ARC_CACHED (1 << 4) /* I/O was already in cache */
#define ARC_L2CACHE (1 << 5) /* cache in L2ARC */
-void arc_space_consume(uint64_t space);
-void arc_space_return(uint64_t space);
+/*
+ * The following breakdows of arc_size exist for kstat only.
+ */
+typedef enum arc_space_type {
+ ARC_SPACE_DATA,
+ ARC_SPACE_HDRS,
+ ARC_SPACE_L2HDRS,
+ ARC_SPACE_OTHER,
+ ARC_SPACE_NUMTYPES
+} arc_space_type_t;
+
+void arc_space_consume(uint64_t space, arc_space_type_t type);
+void arc_space_return(uint64_t space, arc_space_type_t type);
void *arc_data_buf_alloc(uint64_t space);
void arc_data_buf_free(void *buf, uint64_t space);
arc_buf_t *arc_buf_alloc(spa_t *spa, int size, void *tag,
#ifndef _SYS_DMU_OBJSET_H
#define _SYS_DMU_OBJSET_H
-#pragma ident "%Z%%M% %I% %E% SMI"
-
#include <sys/spa.h>
#include <sys/arc.h>
#include <sys/txg.h>
int flags);
int dmu_objset_find_spa(spa_t *spa, const char *name,
int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags);
+int dmu_objset_prefetch(char *name, void *arg);
void dmu_objset_byteswap(void *buf, size_t size);
int dmu_objset_evict_dbufs(objset_t *os);
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
uint16_t dn_datablkszsec; /* in 512b sectors */
uint32_t dn_datablksz; /* in bytes */
uint64_t dn_maxblkid;
+ uint8_t dn_next_nblkptr[TXG_SIZE];
uint8_t dn_next_nlevels[TXG_SIZE];
uint8_t dn_next_indblkshift[TXG_SIZE];
uint16_t dn_next_bonuslen[TXG_SIZE];
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
+extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t);
/* asynchronous event notification */
extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
vnode_t *z_vnode;
uint64_t z_id; /* object ID for this znode */
kmutex_t z_lock; /* znode modification lock */
- krwlock_t z_map_lock; /* page map lock */
krwlock_t z_parent_lock; /* parent lock for directories */
krwlock_t z_name_lock; /* "master" lock for dirent locks */
zfs_dirlock_t *z_dirlocks; /* directory entry lock list */
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#define ZIO_REEXECUTE_NOW 0x01
#define ZIO_REEXECUTE_SUSPEND 0x02
+typedef struct zio_link {
+ zio_t *zl_parent;
+ zio_t *zl_child;
+ list_node_t zl_parent_node;
+ list_node_t zl_child_node;
+} zio_link_t;
+
struct zio {
/* Core information about this I/O */
zbookmark_t io_bookmark;
uint8_t io_priority;
uint8_t io_reexecute;
uint8_t io_async_root;
+ uint8_t io_state[ZIO_WAIT_TYPES];
uint64_t io_txg;
spa_t *io_spa;
blkptr_t *io_bp;
blkptr_t io_bp_copy;
- zio_t *io_parent;
- zio_t *io_child;
- zio_t *io_sibling_prev;
- zio_t *io_sibling_next;
+ list_t io_parent_list;
+ list_t io_child_list;
+ zio_link_t *io_walk_link;
zio_t *io_logical;
zio_transform_t *io_transform_stack;
avl_node_t io_offset_node;
avl_node_t io_deadline_node;
avl_tree_t *io_vdev_tree;
- zio_t *io_delegate_list;
- zio_t *io_delegate_next;
/* Internal pipeline state */
int io_flags;
uint64_t io_ena;
};
-extern zio_t *zio_null(zio_t *pio, spa_t *spa,
+extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd,
zio_done_func_t *done, void *private, int flags);
extern zio_t *zio_root(spa_t *spa,
extern void zio_execute(zio_t *zio);
extern void zio_interrupt(zio_t *zio);
+extern zio_t *zio_walk_parents(zio_t *cio);
+extern zio_t *zio_walk_children(zio_t *pio);
+extern zio_t *zio_unique_parent(zio_t *cio);
+extern void zio_add_child(zio_t *pio, zio_t *cio);
+
extern void *zio_buf_alloc(size_t size);
extern void zio_buf_free(void *buf, size_t size);
extern void *zio_data_buf_alloc(size_t size);
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/sunddi.h>
#include <sys/spa_boot.h>
+#ifdef _KERNEL
+#include <sys/zone.h>
+#endif /* _KERNEL */
+
#include "zfs_prop.h"
#include "zfs_comutil.h"
static void
spa_prop_get_config(spa_t *spa, nvlist_t **nvp)
{
- uint64_t size = spa_get_space(spa);
- uint64_t used = spa_get_alloc(spa);
+ uint64_t size;
+ uint64_t used;
uint64_t cap, version;
zprop_source_t src = ZPROP_SRC_NONE;
spa_config_dirent_t *dp;
ASSERT(MUTEX_HELD(&spa->spa_props_lock));
- /*
- * readonly properties
- */
- spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src);
- spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src);
- spa_prop_add_list(*nvp, ZPOOL_PROP_USED, NULL, used, src);
- spa_prop_add_list(*nvp, ZPOOL_PROP_AVAILABLE, NULL, size - used, src);
-
- cap = (size == 0) ? 0 : (used * 100 / size);
- spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src);
+ if (spa->spa_root_vdev != NULL) {
+ size = spa_get_space(spa);
+ used = spa_get_alloc(spa);
+ spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src);
+ spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src);
+ spa_prop_add_list(*nvp, ZPOOL_PROP_USED, NULL, used, src);
+ spa_prop_add_list(*nvp, ZPOOL_PROP_AVAILABLE, NULL,
+ size - used, src);
+
+ cap = (size == 0) ? 0 : (used * 100 / size);
+ spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src);
+
+ spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL,
+ spa->spa_root_vdev->vdev_state, src);
+
+ version = spa_version(spa);
+ if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION))
+ src = ZPROP_SRC_DEFAULT;
+ else
+ src = ZPROP_SRC_LOCAL;
+ spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src);
+ }
spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src);
- spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL,
- spa->spa_root_vdev->vdev_state, src);
-
- /*
- * settable properties that are not stored in the pool property object.
- */
- version = spa_version(spa);
- if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION))
- src = ZPROP_SRC_DEFAULT;
- else
- src = ZPROP_SRC_LOCAL;
- spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src);
if (spa->spa_root != NULL)
spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root,
return (error);
}
+void
+spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync)
+{
+ char *cachefile;
+ spa_config_dirent_t *dp;
+
+ if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE),
+ &cachefile) != 0)
+ return;
+
+ dp = kmem_alloc(sizeof (spa_config_dirent_t),
+ KM_SLEEP);
+
+ if (cachefile[0] == '\0')
+ dp->scd_path = spa_strdup(spa_config_path);
+ else if (strcmp(cachefile, "none") == 0)
+ dp->scd_path = NULL;
+ else
+ dp->scd_path = spa_strdup(cachefile);
+
+ list_insert_head(&spa->spa_config_list, dp);
+ if (need_sync)
+ spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
+}
+
int
spa_prop_set(spa_t *spa, nvlist_t *nvp)
{
int error;
+ nvpair_t *elem;
+ boolean_t need_sync = B_FALSE;
+ zpool_prop_t prop;
if ((error = spa_prop_validate(spa, nvp)) != 0)
return (error);
- return (dsl_sync_task_do(spa_get_dsl(spa), NULL, spa_sync_props,
- spa, nvp, 3));
+ elem = NULL;
+ while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) {
+ if ((prop = zpool_name_to_prop(
+ nvpair_name(elem))) == ZPROP_INVAL)
+ return (EINVAL);
+
+ if (prop == ZPOOL_PROP_CACHEFILE || prop == ZPOOL_PROP_ALTROOT)
+ continue;
+
+ need_sync = B_TRUE;
+ break;
+ }
+
+ if (need_sync)
+ return (dsl_sync_task_do(spa_get_dsl(spa), NULL, spa_sync_props,
+ spa, nvp, 3));
+ else
+ return (0);
}
/*
VERIFY(nvlist_lookup_string(newconfig,
ZPOOL_CONFIG_HOSTNAME, &hostname) == 0);
+#ifdef _KERNEL
+ myhostid = zone_get_hostid(NULL);
+#else /* _KERNEL */
+ /*
+ * We're emulating the system's hostid in userland, so
+ * we can't use zone_get_hostid().
+ */
(void) ddi_strtoul(hw_serial, NULL, 10, &myhostid);
+#endif /* _KERNEL */
if (hostid != 0 && myhostid != 0 &&
- (unsigned long)hostid != myhostid) {
+ hostid != myhostid) {
cmn_err(CE_WARN, "pool '%s' could not be "
"loaded as it was last accessed by "
"another system (host: %s hostid: 0x%lx). "
spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS);
spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION);
spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE);
- if (props)
+ if (props != NULL) {
+ spa_configfile_set(spa, props, B_FALSE);
spa_sync_props(spa, props, CRED(), tx);
+ }
dmu_tx_commit(tx);
if (version >= SPA_VERSION_ZPOOL_HISTORY && history_str != NULL)
(void) spa_history_log(spa, history_str, LOG_CMD_POOL_CREATE);
- mutex_exit(&spa_namespace_lock);
-
spa->spa_minref = refcount_count(&spa->spa_refcount);
+ mutex_exit(&spa_namespace_lock);
+
return (0);
}
VDEV_ALLOC_L2CACHE);
spa_config_exit(spa, SCL_ALL, FTAG);
+ if (props != NULL)
+ spa_configfile_set(spa, props, B_FALSE);
+
if (error != 0 || (props && spa_writeable(spa) &&
(error = spa_prop_set(spa, props)))) {
if (loaderr != 0 && loaderr != EINVAL && allowfaulted) {
char *poolname;
spa_t *spa;
uint64_t state;
+ int error;
if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname))
return (NULL);
* Pass TRUE for mosconfig because the user-supplied config
* is actually the one to trust when doing an import.
*/
- (void) spa_load(spa, tryconfig, SPA_LOAD_TRYIMPORT, B_TRUE);
+ error = spa_load(spa, tryconfig, SPA_LOAD_TRYIMPORT, B_TRUE);
/*
* If 'tryconfig' was at least parsable, return the current config.
* copy it out so that external consumers can tell which
* pools are bootable.
*/
- if (spa->spa_bootfs) {
+ if ((!error || error == EEXIST) && spa->spa_bootfs) {
char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP);
/*
zpool_prop_t prop;
const char *propname;
zprop_type_t proptype;
- spa_config_dirent_t *dp;
mutex_enter(&spa->spa_props_lock);
case ZPOOL_PROP_CACHEFILE:
/*
- * 'cachefile' is a non-persistent property, but note
- * an async request that the config cache needs to be
- * udpated.
+ * 'cachefile' is also a non-persisitent property.
*/
- VERIFY(nvpair_value_string(elem, &strval) == 0);
-
- dp = kmem_alloc(sizeof (spa_config_dirent_t), KM_SLEEP);
-
- if (strval[0] == '\0')
- dp->scd_path = spa_strdup(spa_config_path);
- else if (strcmp(strval, "none") == 0)
- dp->scd_path = NULL;
- else
- dp->scd_path = spa_strdup(strval);
-
- list_insert_head(&spa->spa_config_list, dp);
- spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
break;
default:
/*
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/sunddi.h>
#ifdef _KERNEL
#include <sys/kobj.h>
+#include <sys/zone.h>
#endif
/*
txg) == 0);
VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID,
spa_guid(spa)) == 0);
+#ifdef _KERNEL
+ hostid = zone_get_hostid(NULL);
+#else /* _KERNEL */
+ /*
+ * We're emulating the system's hostid in userland, so we can't use
+ * zone_get_hostid().
+ */
(void) ddi_strtoul(hw_serial, NULL, 10, &hostid);
+#endif /* _KERNEL */
if (hostid != 0) {
VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_HOSTID,
hostid) == 0);
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
boolean_t vps_readable;
boolean_t vps_writeable;
int vps_flags;
- zio_t *vps_root;
- vdev_t *vps_vd;
} vdev_probe_stats_t;
static void
vdev_probe_done(zio_t *zio)
{
spa_t *spa = zio->io_spa;
+ vdev_t *vd = zio->io_vd;
vdev_probe_stats_t *vps = zio->io_private;
- vdev_t *vd = vps->vps_vd;
+
+ ASSERT(vd->vdev_probe_zio != NULL);
if (zio->io_type == ZIO_TYPE_READ) {
- ASSERT(zio->io_vd == vd);
if (zio->io_error == 0)
vps->vps_readable = 1;
if (zio->io_error == 0 && spa_writeable(spa)) {
- zio_nowait(zio_write_phys(vps->vps_root, vd,
+ zio_nowait(zio_write_phys(vd->vdev_probe_zio, vd,
zio->io_offset, zio->io_size, zio->io_data,
ZIO_CHECKSUM_OFF, vdev_probe_done, vps,
ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE));
zio_buf_free(zio->io_data, zio->io_size);
}
} else if (zio->io_type == ZIO_TYPE_WRITE) {
- ASSERT(zio->io_vd == vd);
if (zio->io_error == 0)
vps->vps_writeable = 1;
zio_buf_free(zio->io_data, zio->io_size);
} else if (zio->io_type == ZIO_TYPE_NULL) {
- ASSERT(zio->io_vd == NULL);
- ASSERT(zio == vps->vps_root);
+ zio_t *pio;
vd->vdev_cant_read |= !vps->vps_readable;
vd->vdev_cant_write |= !vps->vps_writeable;
spa, vd, NULL, 0, 0);
zio->io_error = ENXIO;
}
+
+ mutex_enter(&vd->vdev_probe_lock);
+ ASSERT(vd->vdev_probe_zio == zio);
+ vd->vdev_probe_zio = NULL;
+ mutex_exit(&vd->vdev_probe_lock);
+
+ while ((pio = zio_walk_parents(zio)) != NULL)
+ if (!vdev_accessible(vd, pio))
+ pio->io_error = ENXIO;
+
kmem_free(vps, sizeof (*vps));
}
}
* but the first (which we leave alone in case it contains a VTOC).
*/
zio_t *
-vdev_probe(vdev_t *vd, zio_t *pio)
+vdev_probe(vdev_t *vd, zio_t *zio)
{
spa_t *spa = vd->vdev_spa;
- vdev_probe_stats_t *vps;
- zio_t *zio;
+ vdev_probe_stats_t *vps = NULL;
+ zio_t *pio;
- vps = kmem_zalloc(sizeof (*vps), KM_SLEEP);
+ ASSERT(vd->vdev_ops->vdev_op_leaf);
- vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE |
- ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE | ZIO_FLAG_DONT_RETRY;
+ /*
+ * Don't probe the probe.
+ */
+ if (zio && (zio->io_flags & ZIO_FLAG_PROBE))
+ return (NULL);
- if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) {
- /*
- * vdev_cant_read and vdev_cant_write can only transition
- * from TRUE to FALSE when we have the SCL_ZIO lock as writer;
- * otherwise they can only transition from FALSE to TRUE.
- * This ensures that any zio looking at these values can
- * assume that failures persist for the life of the I/O.
- * That's important because when a device has intermittent
- * connectivity problems, we want to ensure that they're
- * ascribed to the device (ENXIO) and not the zio (EIO).
- *
- * Since we hold SCL_ZIO as writer here, clear both values
- * so the probe can reevaluate from first principles.
- */
- vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER;
- vd->vdev_cant_read = B_FALSE;
- vd->vdev_cant_write = B_FALSE;
+ /*
+ * To prevent 'probe storms' when a device fails, we create
+ * just one probe i/o at a time. All zios that want to probe
+ * this vdev will become parents of the probe io.
+ */
+ mutex_enter(&vd->vdev_probe_lock);
+
+ if ((pio = vd->vdev_probe_zio) == NULL) {
+ vps = kmem_zalloc(sizeof (*vps), KM_SLEEP);
+
+ vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE |
+ ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE |
+ ZIO_FLAG_DONT_RETRY;
+
+ if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) {
+ /*
+ * vdev_cant_read and vdev_cant_write can only
+ * transition from TRUE to FALSE when we have the
+ * SCL_ZIO lock as writer; otherwise they can only
+ * transition from FALSE to TRUE. This ensures that
+ * any zio looking at these values can assume that
+ * failures persist for the life of the I/O. That's
+ * important because when a device has intermittent
+ * connectivity problems, we want to ensure that
+ * they're ascribed to the device (ENXIO) and not
+ * the zio (EIO).
+ *
+ * Since we hold SCL_ZIO as writer here, clear both
+ * values so the probe can reevaluate from first
+ * principles.
+ */
+ vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER;
+ vd->vdev_cant_read = B_FALSE;
+ vd->vdev_cant_write = B_FALSE;
+ }
+
+ vd->vdev_probe_zio = pio = zio_null(NULL, spa, vd,
+ vdev_probe_done, vps,
+ vps->vps_flags | ZIO_FLAG_DONT_PROPAGATE);
+
+ if (zio != NULL) {
+ vd->vdev_probe_wanted = B_TRUE;
+ spa_async_request(spa, SPA_ASYNC_PROBE);
+ }
}
- ASSERT(vd->vdev_ops->vdev_op_leaf);
+ if (zio != NULL)
+ zio_add_child(zio, pio);
- zio = zio_null(pio, spa, vdev_probe_done, vps, vps->vps_flags);
+ mutex_exit(&vd->vdev_probe_lock);
- vps->vps_root = zio;
- vps->vps_vd = vd;
+ if (vps == NULL) {
+ ASSERT(zio != NULL);
+ return (NULL);
+ }
for (int l = 1; l < VDEV_LABELS; l++) {
- zio_nowait(zio_read_phys(zio, vd,
+ zio_nowait(zio_read_phys(pio, vd,
vdev_label_offset(vd->vdev_psize, l,
offsetof(vdev_label_t, vl_pad)),
VDEV_SKIP_SIZE, zio_buf_alloc(VDEV_SKIP_SIZE),
ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE));
}
- return (zio);
+ if (zio == NULL)
+ return (pio);
+
+ zio_nowait(pio);
+ return (NULL);
}
/*
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
* Fill a previously allocated cache entry with data.
*/
static void
-vdev_cache_fill(zio_t *zio)
+vdev_cache_fill(zio_t *fio)
{
- vdev_t *vd = zio->io_vd;
+ vdev_t *vd = fio->io_vd;
vdev_cache_t *vc = &vd->vdev_cache;
- vdev_cache_entry_t *ve = zio->io_private;
- zio_t *dio;
+ vdev_cache_entry_t *ve = fio->io_private;
+ zio_t *pio;
- ASSERT(zio->io_size == VCBS);
+ ASSERT(fio->io_size == VCBS);
/*
* Add data to the cache.
*/
mutex_enter(&vc->vc_lock);
- ASSERT(ve->ve_fill_io == zio);
- ASSERT(ve->ve_offset == zio->io_offset);
- ASSERT(ve->ve_data == zio->io_data);
+ ASSERT(ve->ve_fill_io == fio);
+ ASSERT(ve->ve_offset == fio->io_offset);
+ ASSERT(ve->ve_data == fio->io_data);
ve->ve_fill_io = NULL;
* any reads that were queued up before the missed update are still
* valid, so we can satisfy them from this line before we evict it.
*/
- for (dio = zio->io_delegate_list; dio; dio = dio->io_delegate_next)
- vdev_cache_hit(vc, ve, dio);
+ while ((pio = zio_walk_parents(fio)) != NULL)
+ vdev_cache_hit(vc, ve, pio);
- if (zio->io_error || ve->ve_missed_update)
+ if (fio->io_error || ve->ve_missed_update)
vdev_cache_evict(vc, ve);
mutex_exit(&vc->vc_lock);
-
- while ((dio = zio->io_delegate_list) != NULL) {
- zio->io_delegate_list = dio->io_delegate_next;
- dio->io_delegate_next = NULL;
- dio->io_error = zio->io_error;
- zio_execute(dio);
- }
}
/*
}
if ((fio = ve->ve_fill_io) != NULL) {
- zio->io_delegate_next = fio->io_delegate_list;
- fio->io_delegate_list = zio;
zio_vdev_io_bypass(zio);
+ zio_add_child(zio, fio);
mutex_exit(&vc->vc_lock);
VDCSTAT_BUMP(vdc_stat_delegations);
return (0);
zio_vdev_io_bypass(zio);
mutex_exit(&vc->vc_lock);
- zio_execute(zio);
VDCSTAT_BUMP(vdc_stat_hits);
return (0);
}
ZIO_FLAG_DONT_CACHE, vdev_cache_fill, ve);
ve->ve_fill_io = fio;
- fio->io_delegate_list = zio;
zio_vdev_io_bypass(zio);
+ zio_add_child(zio, fio);
mutex_exit(&vc->vc_lock);
zio_nowait(fio);
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
for (vd = list_head(dl); vd != NULL; vd = list_next(dl, vd)) {
uint64_t *good_writes = kmem_zalloc(sizeof (uint64_t),
KM_SLEEP);
- zio_t *vio = zio_null(zio, spa,
+ zio_t *vio = zio_null(zio, spa, NULL,
(vd->vdev_islog || vd->vdev_aux != NULL) ?
vdev_label_sync_ignore_done : vdev_label_sync_top_done,
good_writes, flags);
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
mirror_child_t *mc = zio->io_private;
if (zio->io_error == 0) {
- zio_t *pio = zio->io_parent;
- mutex_enter(&pio->io_lock);
- ASSERT3U(zio->io_size, >=, pio->io_size);
- bcopy(zio->io_data, pio->io_data, pio->io_size);
- mutex_exit(&pio->io_lock);
+ zio_t *pio;
+
+ mutex_enter(&zio->io_lock);
+ while ((pio = zio_walk_parents(zio)) != NULL) {
+ mutex_enter(&pio->io_lock);
+ ASSERT3U(zio->io_size, >=, pio->io_size);
+ bcopy(zio->io_data, pio->io_data, pio->io_size);
+ mutex_exit(&pio->io_lock);
+ }
+ mutex_exit(&zio->io_lock);
}
zio_buf_free(zio->io_data, zio->io_size);
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
static void
vdev_queue_agg_io_done(zio_t *aio)
{
- zio_t *dio;
- uint64_t offset = 0;
+ zio_t *pio;
- while ((dio = aio->io_delegate_list) != NULL) {
+ while ((pio = zio_walk_parents(aio)) != NULL)
if (aio->io_type == ZIO_TYPE_READ)
- bcopy((char *)aio->io_data + offset, dio->io_data,
- dio->io_size);
- offset += dio->io_size;
- aio->io_delegate_list = dio->io_delegate_next;
- dio->io_delegate_next = NULL;
- dio->io_error = aio->io_error;
- zio_execute(dio);
- }
- ASSERT3U(offset, ==, aio->io_size);
+ bcopy((char *)aio->io_data + (pio->io_offset -
+ aio->io_offset), pio->io_data, pio->io_size);
zio_buf_free(aio->io_data, aio->io_size);
}
static zio_t *
vdev_queue_io_to_issue(vdev_queue_t *vq, uint64_t pending_limit)
{
- zio_t *fio, *lio, *aio, *dio;
- avl_tree_t *tree;
+ zio_t *fio, *lio, *aio, *dio, *nio;
+ avl_tree_t *t;
uint64_t size;
int flags;
fio = lio = avl_first(&vq->vq_deadline_tree);
- tree = fio->io_vdev_tree;
+ t = fio->io_vdev_tree;
size = fio->io_size;
flags = fio->io_flags & ZIO_FLAG_AGG_INHERIT;
* of the I/O, such as whether it's a normal I/O or a
* scrub/resilver, can be preserved in the aggregate.
*/
- while ((dio = AVL_PREV(tree, fio)) != NULL &&
+ while ((dio = AVL_PREV(t, fio)) != NULL &&
IS_ADJACENT(dio, fio) &&
(dio->io_flags & ZIO_FLAG_AGG_INHERIT) == flags &&
size + dio->io_size <= zfs_vdev_aggregation_limit) {
- dio->io_delegate_next = fio;
fio = dio;
size += dio->io_size;
}
- while ((dio = AVL_NEXT(tree, lio)) != NULL &&
+ while ((dio = AVL_NEXT(t, lio)) != NULL &&
IS_ADJACENT(lio, dio) &&
(dio->io_flags & ZIO_FLAG_AGG_INHERIT) == flags &&
size + dio->io_size <= zfs_vdev_aggregation_limit) {
- lio->io_delegate_next = dio;
lio = dio;
size += dio->io_size;
}
}
if (fio != lio) {
- char *buf = zio_buf_alloc(size);
- uint64_t offset = 0;
-
ASSERT(size <= zfs_vdev_aggregation_limit);
aio = zio_vdev_delegated_io(fio->io_vd, fio->io_offset,
- buf, size, fio->io_type, ZIO_PRIORITY_NOW,
+ zio_buf_alloc(size), size, fio->io_type, ZIO_PRIORITY_NOW,
flags | ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE,
vdev_queue_agg_io_done, NULL);
- aio->io_delegate_list = fio;
-
- for (dio = fio; dio != NULL; dio = dio->io_delegate_next) {
+ /* We want to process lio, then stop */
+ lio = AVL_NEXT(t, lio);
+ for (dio = fio; dio != lio; dio = nio) {
ASSERT(dio->io_type == aio->io_type);
- ASSERT(dio->io_vdev_tree == tree);
+ ASSERT(dio->io_vdev_tree == t);
+
if (dio->io_type == ZIO_TYPE_WRITE)
- bcopy(dio->io_data, buf + offset, dio->io_size);
- offset += dio->io_size;
+ bcopy(dio->io_data, (char *)aio->io_data +
+ (dio->io_offset - aio->io_offset),
+ dio->io_size);
+ nio = AVL_NEXT(t, dio);
+
+ zio_add_child(dio, aio);
vdev_queue_io_remove(vq, dio);
zio_vdev_io_bypass(dio);
+ zio_execute(dio);
}
- ASSERT(offset == size);
-
avl_add(&vq->vq_pending_tree, aio);
return (aio);
}
- ASSERT(fio->io_vdev_tree == tree);
+ ASSERT(fio->io_vdev_tree == t);
vdev_queue_io_remove(vq, fio);
avl_add(&vq->vq_pending_tree, fio);
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
-#pragma ident "%Z%%M% %I% %E% SMI"
-
/*
* ZFS control directory (a.k.a. ".zfs")
*
zfsctl_common_access(vnode_t *vp, int mode, int flags, cred_t *cr,
caller_context_t *ct)
{
- if (mode & VWRITE)
- return (EACCES);
+ if (flags & V_ACE_MASK) {
+ if (mode & ACE_ALL_WRITE_PERMS)
+ return (EACCES);
+ } else {
+ if (mode & VWRITE)
+ return (EACCES);
+ }
return (0);
}
return (err);
}
+static int
+zfsctl_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr,
+ caller_context_t *ct)
+{
+ /*
+ * We only care about ACL_ENABLED so that libsec can
+ * display ACL correctly and not default to POSIX draft.
+ */
+ if (cmd == _PC_ACL_ENABLED) {
+ *valp = _ACL_ACE_ENABLED;
+ return (0);
+ }
+
+ return (fs_pathconf(vp, cmd, valp, cr, ct));
+}
+
static const fs_operation_def_t zfsctl_tops_root[] = {
{ VOPNAME_OPEN, { .vop_open = zfsctl_common_open } },
{ VOPNAME_CLOSE, { .vop_close = zfsctl_common_close } },
{ VOPNAME_LOOKUP, { .vop_lookup = zfsctl_root_lookup } },
{ VOPNAME_SEEK, { .vop_seek = fs_seek } },
{ VOPNAME_INACTIVE, { .vop_inactive = gfs_vop_inactive } },
+ { VOPNAME_PATHCONF, { .vop_pathconf = zfsctl_pathconf } },
{ VOPNAME_FID, { .vop_fid = zfsctl_common_fid } },
{ NULL }
};
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
boolean_t zvec_his_log;
} zfs_ioc_vec_t;
-static void clear_props(char *dataset, nvlist_t *props);
+static void clear_props(char *dataset, nvlist_t *props, nvlist_t *newprops);
static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
boolean_t *);
int zfs_set_prop_nvlist(const char *, nvlist_t *);
(void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
p = zc->zc_name + strlen(zc->zc_name);
+ if (zc->zc_cookie == 0) {
+ uint64_t cookie = 0;
+ int len = sizeof (zc->zc_name) - (p - zc->zc_name);
+
+ while (dmu_dir_list_next(os, len, p, NULL, &cookie) == 0)
+ dmu_objset_prefetch(p, NULL);
+ }
+
do {
error = dmu_dir_list_next(os,
sizeof (zc->zc_name) - (p - zc->zc_name), p,
if (error)
return (error == ENOENT ? ESRCH : error);
+ if (zc->zc_cookie == 0)
+ dmu_objset_find(zc->zc_name, dmu_objset_prefetch,
+ NULL, DS_FIND_SNAPSHOTS);
/*
* A dataset name of maximum length cannot have any snapshots,
* so exit immediately.
if (dmu_objset_open(zc->zc_name, DMU_OST_ANY,
DS_MODE_USER | DS_MODE_READONLY, &os) == 0) {
if (dsl_prop_get_all(os, &origprops, TRUE) == 0) {
- clear_props(zc->zc_name, origprops);
+ clear_props(zc->zc_name, origprops, nvl);
nvlist_free(origprops);
}
dmu_objset_close(os);
nvlist_t *props;
spa_t *spa;
int error;
+ nvpair_t *elem;
if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
&props)))
return (error);
+ /*
+ * If the only property is the configfile, then just do a spa_lookup()
+ * to handle the faulted case.
+ */
+ elem = nvlist_next_nvpair(props, NULL);
+ if (elem != NULL && strcmp(nvpair_name(elem),
+ zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
+ nvlist_next_nvpair(props, elem) == NULL) {
+ mutex_enter(&spa_namespace_lock);
+ if ((spa = spa_lookup(zc->zc_name)) != NULL) {
+ spa_configfile_set(spa, props, B_FALSE);
+ spa_config_sync(spa, B_FALSE, B_TRUE);
+ }
+ mutex_exit(&spa_namespace_lock);
+ if (spa != NULL)
+ return (0);
+ }
+
if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
nvlist_free(props);
return (error);
int error;
nvlist_t *nvp = NULL;
- if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
- return (error);
-
- error = spa_prop_get(spa, &nvp);
+ if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
+ /*
+ * If the pool is faulted, there may be properties we can still
+ * get (such as altroot and cachefile), so attempt to get them
+ * anyway.
+ */
+ mutex_enter(&spa_namespace_lock);
+ if ((spa = spa_lookup(zc->zc_name)) != NULL)
+ error = spa_prop_get(spa, &nvp);
+ mutex_exit(&spa_namespace_lock);
+ } else {
+ error = spa_prop_get(spa, &nvp);
+ spa_close(spa, FTAG);
+ }
if (error == 0 && zc->zc_nvlist_dst != NULL)
error = put_nvlist(zc, nvp);
else
error = EFAULT;
- spa_close(spa, FTAG);
-
- if (nvp)
- nvlist_free(nvp);
+ nvlist_free(nvp);
return (error);
}
}
static void
-clear_props(char *dataset, nvlist_t *props)
+clear_props(char *dataset, nvlist_t *props, nvlist_t *newprops)
{
zfs_cmd_t *zc;
nvpair_t *prop;
(void) strcpy(zc->zc_name, dataset);
for (prop = nvlist_next_nvpair(props, NULL); prop;
prop = nvlist_next_nvpair(props, prop)) {
+ if (newprops != NULL &&
+ nvlist_exists(newprops, nvpair_name(prop)))
+ continue;
(void) strcpy(zc->zc_value, nvpair_name(prop));
if (zfs_secpolicy_inherit(zc, CRED()) == 0)
(void) zfs_ioc_inherit_prop(zc);
* so that the properties are applied to the new data.
*/
if (props) {
- clear_props(tofs, origprops);
+ clear_props(tofs, origprops, props);
/*
* XXX - Note, this is all-or-nothing; should be best-effort.
*/
* On error, restore the original props.
*/
if (error && props) {
- clear_props(tofs, props);
+ clear_props(tofs, props, NULL);
(void) zfs_set_prop_nvlist(tofs, origprops);
}
out:
* CDDL HEADER END
*/
/*
- * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
-#pragma ident "%Z%%M% %I% %E% SMI"
-
/*
* This file contains the code to implement file range locking in
* ZFS, although there isn't much specific to ZFS (all that comes to mind
new = kmem_alloc(sizeof (rl_t), KM_SLEEP);
new->r_zp = zp;
new->r_off = off;
+ if (len + off < off) /* overflow */
+ len = UINT64_MAX - off;
new->r_len = len;
new->r_cnt = 1; /* assume it's going to be in the tree */
new->r_type = type;
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
*
* On Write: If we find a memory mapped page, we write to *both*
* the page and the dmu buffer.
- *
- * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when
- * the file is memory mapped.
*/
-static int
-mappedwrite(vnode_t *vp, int nbytes, uio_t *uio, dmu_tx_t *tx)
+static void
+update_pages(vnode_t *vp, int64_t start, int len, objset_t *os, uint64_t oid)
{
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- int64_t start, off;
- int len = nbytes;
- int error = 0;
+ int64_t off;
- start = uio->uio_loffset;
off = start & PAGEOFFSET;
for (start &= PAGEMASK; len > 0; start += PAGESIZE) {
page_t *pp;
- uint64_t bytes = MIN(PAGESIZE - off, len);
- uint64_t woff = uio->uio_loffset;
+ uint64_t nbytes = MIN(PAGESIZE - off, len);
- /*
- * We don't want a new page to "appear" in the middle of
- * the file update (because it may not get the write
- * update data), so we grab a lock to block
- * zfs_getpage().
- */
- rw_enter(&zp->z_map_lock, RW_WRITER);
if (pp = page_lookup(vp, start, SE_SHARED)) {
caddr_t va;
- rw_exit(&zp->z_map_lock);
va = zfs_map_page(pp, S_WRITE);
- error = uiomove(va+off, bytes, UIO_WRITE, uio);
- if (error == 0) {
- dmu_write(zfsvfs->z_os, zp->z_id,
- woff, bytes, va+off, tx);
- }
+ (void) dmu_read(os, oid, start+off, nbytes, va+off);
zfs_unmap_page(pp, va);
page_unlock(pp);
- } else {
- error = dmu_write_uio(zfsvfs->z_os, zp->z_id,
- uio, bytes, tx);
- rw_exit(&zp->z_map_lock);
}
- len -= bytes;
+ len -= nbytes;
off = 0;
- if (error)
- break;
}
- return (error);
}
/*
* Perhaps we should use SPA_MAXBLOCKSIZE chunks?
*/
nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz));
- rw_enter(&zp->z_map_lock, RW_READER);
tx_bytes = uio->uio_resid;
- if (vn_has_cached_data(vp)) {
- rw_exit(&zp->z_map_lock);
- error = mappedwrite(vp, nbytes, uio, tx);
- } else {
- error = dmu_write_uio(zfsvfs->z_os, zp->z_id,
- uio, nbytes, tx);
- rw_exit(&zp->z_map_lock);
- }
+ error = dmu_write_uio(zfsvfs->z_os, zp->z_id, uio, nbytes, tx);
tx_bytes -= uio->uio_resid;
+ if (tx_bytes && vn_has_cached_data(vp))
+ update_pages(vp, woff,
+ tx_bytes, zfsvfs->z_os, zp->z_id);
/*
* If we made no progress, we're done. If we made even
{
znode_t *zp = VTOZ(vp);
zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- zilog_t *zilog = zfsvfs->z_log;
dmu_tx_t *tx;
- rl_t *rl;
u_offset_t off, koff;
size_t len, klen;
uint64_t filesz;
* a read-modify-write).
*/
if (off < filesz && zp->z_blksz > PAGESIZE) {
- if (!ISP2(zp->z_blksz)) {
- /* Only one block in the file. */
- klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE);
- koff = 0;
- } else {
- klen = zp->z_blksz;
- koff = P2ALIGN(off, (u_offset_t)klen);
- }
+ klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE);
+ koff = ISP2(klen) ? P2ALIGN(off, (u_offset_t)klen) : 0;
ASSERT(koff <= filesz);
if (koff + klen > filesz)
klen = P2ROUNDUP(filesz - koff, (uint64_t)PAGESIZE);
pp = pvn_write_kluster(vp, pp, &off, &len, koff, klen, flags);
}
ASSERT3U(btop(len), ==, btopr(len));
-top:
- rl = zfs_range_lock(zp, off, len, RL_WRITER);
+
/*
* Can't push pages past end-of-file.
*/
- filesz = zp->z_phys->zp_size;
if (off >= filesz) {
/* ignore all pages */
err = 0;
pvn_write_done(trunc, flags);
len = filesz - off;
}
-
+top:
tx = dmu_tx_create(zfsvfs->z_os);
dmu_tx_hold_write(tx, zp->z_id, off, len);
dmu_tx_hold_bonus(tx, zp->z_id);
err = dmu_tx_assign(tx, TXG_NOWAIT);
if (err != 0) {
if (err == ERESTART) {
- zfs_range_unlock(rl);
dmu_tx_wait(tx);
dmu_tx_abort(tx);
- err = 0;
goto top;
}
dmu_tx_abort(tx);
if (err == 0) {
zfs_time_stamper(zp, CONTENT_MODIFIED, tx);
- zfs_log_write(zilog, tx, TX_WRITE, zp, off, len, 0);
+ zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, off, len, 0);
dmu_tx_commit(tx);
}
out:
- zfs_range_unlock(rl);
pvn_write_done(pp, (err ? B_ERROR : 0) | flags);
if (offp)
*offp = off;
page_t *pp;
size_t io_len;
u_offset_t io_off;
- uint64_t filesz;
+ uint_t blksz;
+ rl_t *rl;
int error = 0;
ZFS_ENTER(zfsvfs);
ZFS_VERIFY_ZP(zp);
- if (len == 0) {
+ /*
+ * Align this request to the file block size in case we kluster.
+ * XXX - this can result in pretty aggresive locking, which can
+ * impact simultanious read/write access. One option might be
+ * to break up long requests (len == 0) into block-by-block
+ * operations to get narrower locking.
+ */
+ blksz = zp->z_blksz;
+ if (ISP2(blksz))
+ io_off = P2ALIGN_TYPED(off, blksz, u_offset_t);
+ else
+ io_off = 0;
+ if (len > 0 && ISP2(blksz))
+ io_len = P2ROUNDUP_TYPED(len + (io_off - off), blksz, size_t);
+ else
+ io_len = 0;
+
+ if (io_len == 0) {
/*
- * Search the entire vp list for pages >= off.
+ * Search the entire vp list for pages >= io_off.
*/
- error = pvn_vplist_dirty(vp, (u_offset_t)off, zfs_putapage,
- flags, cr);
+ rl = zfs_range_lock(zp, io_off, UINT64_MAX, RL_WRITER);
+ error = pvn_vplist_dirty(vp, io_off, zfs_putapage, flags, cr);
goto out;
}
+ rl = zfs_range_lock(zp, io_off, io_len, RL_WRITER);
- filesz = zp->z_phys->zp_size; /* get consistent copy of zp_size */
- if (off > filesz) {
+ if (off > zp->z_phys->zp_size) {
/* past end of file */
+ zfs_range_unlock(rl);
ZFS_EXIT(zfsvfs);
return (0);
}
- len = MIN(len, filesz - off);
+ len = MIN(io_len, P2ROUNDUP(zp->z_phys->zp_size, PAGESIZE) - io_off);
- for (io_off = off; io_off < off + len; io_off += io_len) {
+ for (off = io_off; io_off < off + len; io_off += io_len) {
if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) {
pp = page_lookup(vp, io_off,
(flags & (B_INVAL | B_FREE)) ? SE_EXCL : SE_SHARED);
}
}
out:
+ zfs_range_unlock(rl);
if ((flags & B_ASYNC) == 0)
zil_commit(zfsvfs->z_log, UINT64_MAX, zp->z_id);
ZFS_EXIT(zfsvfs);
/*
* If we can't find a page in the cache, we will create a new page
* and fill it with file data. For efficiency, we may try to fill
- * multiple pages at once (klustering).
+ * multiple pages at once (klustering) to fill up the supplied page
+ * list.
*/
static int
zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg,
znode_t *zp = VTOZ(vp);
page_t *pp, *cur_pp;
objset_t *os = zp->z_zfsvfs->z_os;
- caddr_t va;
u_offset_t io_off, total;
- uint64_t oid = zp->z_id;
size_t io_len;
- uint64_t filesz;
int err;
- /*
- * If we are only asking for a single page don't bother klustering.
- */
- filesz = zp->z_phys->zp_size; /* get consistent copy of zp_size */
- if (off >= filesz)
- return (EFAULT);
if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE) {
+ /*
+ * We only have a single page, don't bother klustering
+ */
io_off = off;
io_len = PAGESIZE;
pp = page_create_va(vp, io_off, io_len, PG_WAIT, seg, addr);
} else {
/*
- * Try to fill a kluster of pages (a blocks worth).
+ * Try to find enough pages to fill the page list
*/
- size_t klen;
- u_offset_t koff;
-
- if (!ISP2(zp->z_blksz)) {
- /* Only one block in the file. */
- klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE);
- koff = 0;
- } else {
- /*
- * It would be ideal to align our offset to the
- * blocksize but doing so has resulted in some
- * strange application crashes. For now, we
- * leave the offset as is and only adjust the
- * length if we are off the end of the file.
- */
- koff = off;
- klen = plsz;
- }
- ASSERT(koff <= filesz);
- if (koff + klen > filesz)
- klen = P2ROUNDUP(filesz, (uint64_t)PAGESIZE) - koff;
- ASSERT3U(off, >=, koff);
- ASSERT3U(off, <, koff + klen);
pp = pvn_read_kluster(vp, off, seg, addr, &io_off,
- &io_len, koff, klen, 0);
+ &io_len, off, plsz, 0);
}
if (pp == NULL) {
/*
- * Some other thread entered the page before us.
- * Return to zfs_getpage to retry the lookup.
+ * The page already exists, nothing to do here.
*/
*pl = NULL;
return (0);
*/
cur_pp = pp;
for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) {
+ caddr_t va;
+
ASSERT3U(io_off, ==, cur_pp->p_offset);
va = zfs_map_page(cur_pp, S_WRITE);
- err = dmu_read(os, oid, io_off, PAGESIZE, va);
+ err = dmu_read(os, zp->z_id, io_off, PAGESIZE, va);
zfs_unmap_page(cur_pp, va);
if (err) {
/* On error, toss the entire kluster */
}
cur_pp = cur_pp->p_next;
}
-out:
+
/*
- * Fill in the page list array from the kluster. If
- * there are too many pages in the kluster, return
- * as many pages as possible starting from the desired
- * offset `off'.
+ * Fill in the page list array from the kluster starting
+ * from the desired offset `off'.
* NOTE: the page list will always be null terminated.
*/
pvn_plist_init(pp, pl, plsz, off, io_len, rw);
+ ASSERT(pl == NULL || (*pl)->p_offset == off);
return (0);
}
/*
* Return pointers to the pages for the file region [off, off + len]
* in the pl array. If plsz is greater than len, this function may
- * also return page pointers from before or after the specified
- * region (i.e. some region [off', off' + plsz]). These additional
- * pages are only returned if they are already in the cache, or were
- * created as part of a klustered read.
+ * also return page pointers from after the specified region
+ * (i.e. the region [off, off + plsz]). These additional pages are
+ * only returned if they are already in the cache, or were created as
+ * part of a klustered read.
*
* IN: vp - vnode of file to get data from.
* off - position in file to get data from.
{
znode_t *zp = VTOZ(vp);
zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- page_t *pp, **pl0 = pl;
- int need_unlock = 0, err = 0;
- offset_t orig_off;
+ page_t **pl0 = pl;
+ int err = 0;
+
+ /* we do our own caching, faultahead is unnecessary */
+ if (pl == NULL)
+ return (0);
+ else if (len > plsz)
+ len = plsz;
+ else
+ len = P2ROUNDUP(len, PAGESIZE);
+ ASSERT(plsz >= len);
ZFS_ENTER(zfsvfs);
ZFS_VERIFY_ZP(zp);
if (protp)
*protp = PROT_ALL;
- /* no faultahead (for now) */
- if (pl == NULL) {
- ZFS_EXIT(zfsvfs);
- return (0);
- }
-
- /* can't fault past EOF */
- if (off >= zp->z_phys->zp_size) {
- ZFS_EXIT(zfsvfs);
- return (EFAULT);
- }
- orig_off = off;
-
- /*
- * If we already own the lock, then we must be page faulting
- * in the middle of a write to this file (i.e., we are writing
- * to this file using data from a mapped region of the file).
- */
- if (rw_owner(&zp->z_map_lock) != curthread) {
- rw_enter(&zp->z_map_lock, RW_WRITER);
- need_unlock = TRUE;
- }
-
/*
* Loop through the requested range [off, off + len] looking
* for pages. If we don't find a page, we will need to create
* a new page and fill it with data from the file.
*/
while (len > 0) {
- if (plsz < PAGESIZE)
- break;
- if (pp = page_lookup(vp, off, SE_SHARED)) {
- *pl++ = pp;
+ if (*pl = page_lookup(vp, off, SE_SHARED))
+ *(pl+1) = NULL;
+ else if (err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw))
+ goto out;
+ while (*pl) {
+ ASSERT3U((*pl)->p_offset, ==, off);
off += PAGESIZE;
addr += PAGESIZE;
- len -= PAGESIZE;
- plsz -= PAGESIZE;
- } else {
- err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw);
- if (err)
- goto out;
- /*
- * klustering may have changed our region
- * to be block aligned.
- */
- if (((pp = *pl) != 0) && (off != pp->p_offset)) {
- int delta = off - pp->p_offset;
- len += delta;
- off -= delta;
- addr -= delta;
- }
- while (*pl) {
- pl++;
- off += PAGESIZE;
- addr += PAGESIZE;
- plsz -= PAGESIZE;
- if (len > PAGESIZE)
- len -= PAGESIZE;
- else
- len = 0;
+ if (len > 0) {
+ ASSERT3U(len, >=, PAGESIZE);
+ len -= PAGESIZE;
}
+ ASSERT3U(plsz, >=, PAGESIZE);
+ plsz -= PAGESIZE;
+ pl++;
}
}
/*
* Fill out the page array with any pages already in the cache.
*/
- while (plsz > 0) {
- pp = page_lookup_nowait(vp, off, SE_SHARED);
- if (pp == NULL)
- break;
- *pl++ = pp;
- off += PAGESIZE;
- plsz -= PAGESIZE;
+ while (plsz > 0 &&
+ (*pl++ = page_lookup_nowait(vp, off, SE_SHARED))) {
+ off += PAGESIZE;
+ plsz -= PAGESIZE;
}
-
- ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
out:
- /*
- * We can't grab the range lock for the page as reader which would
- * stop truncation as this leads to deadlock. So we need to recheck
- * the file size.
- */
- if (orig_off >= zp->z_phys->zp_size)
- err = EFAULT;
if (err) {
/*
* Release any pages we have previously locked.
*/
while (pl > pl0)
page_unlock(*--pl);
+ } else {
+ ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
}
*pl = NULL;
- if (need_unlock)
- rw_exit(&zp->z_map_lock);
-
ZFS_EXIT(zfsvfs);
return (err);
}
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
list_link_init(&zp->z_link_node);
mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL);
- rw_init(&zp->z_map_lock, NULL, RW_DEFAULT, NULL);
rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL);
rw_init(&zp->z_name_lock, NULL, RW_DEFAULT, NULL);
mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL);
vn_free(ZTOV(zp));
ASSERT(!list_link_active(&zp->z_link_node));
mutex_destroy(&zp->z_lock);
- rw_destroy(&zp->z_map_lock);
rw_destroy(&zp->z_parent_lock);
rw_destroy(&zp->z_name_lock);
mutex_destroy(&zp->z_acl_lock);
dmu_tx_commit(tx);
- zfs_range_unlock(rl);
-
/*
* Clear any mapped pages in the truncated region. This has to
* happen outside of the transaction to avoid the possibility of
* a deadlock with someone trying to push a page that we are
* about to invalidate.
*/
- rw_enter(&zp->z_map_lock, RW_WRITER);
if (vn_has_cached_data(vp)) {
page_t *pp;
uint64_t start = end & PAGEMASK;
B_INVAL | B_TRUNC, NULL);
ASSERT(error == 0);
}
- rw_exit(&zp->z_map_lock);
+
+ zfs_range_unlock(rl);
return (0);
}
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
* ==========================================================================
*/
kmem_cache_t *zio_cache;
+kmem_cache_t *zio_link_cache;
kmem_cache_t *zio_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT];
kmem_cache_t *zio_data_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT];
#ifdef _KERNEL
data_alloc_arena = zio_alloc_arena;
#endif
- zio_cache = kmem_cache_create("zio_cache", sizeof (zio_t), 0,
- NULL, NULL, NULL, NULL, NULL, 0);
+ zio_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);
/*
* For small buffers, we want a cache for each multiple of
zio_data_buf_cache[c] = NULL;
}
+ kmem_cache_destroy(zio_link_cache);
kmem_cache_destroy(zio_cache);
zio_inject_fini();
* 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_link_t *zl = cio->io_walk_link;
+ list_t *pl = &cio->io_parent_list;
-static void
-zio_add_child(zio_t *pio, zio_t *zio)
+ zl = (zl == NULL) ? list_head(pl) : list_next(pl, zl);
+ cio->io_walk_link = zl;
+
+ if (zl == NULL)
+ return (NULL);
+
+ ASSERT(zl->zl_child == cio);
+ return (zl->zl_parent);
+}
+
+zio_t *
+zio_walk_children(zio_t *pio)
+{
+ 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;
+
+ if (zl == NULL)
+ return (NULL);
+
+ ASSERT(zl->zl_parent == pio);
+ return (zl->zl_child);
+}
+
+zio_t *
+zio_unique_parent(zio_t *cio)
+{
+ zio_t *pio = zio_walk_parents(cio);
+
+ VERIFY(zio_walk_parents(cio) == NULL);
+ return (pio);
+}
+
+void
+zio_add_child(zio_t *pio, zio_t *cio)
{
+ zio_link_t *zl = kmem_cache_alloc(zio_link_cache, KM_SLEEP);
+
+ /*
+ * Logical I/Os can have logical, gang, or vdev children.
+ * Gang I/Os can have 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);
+
+ zl->zl_parent = pio;
+ zl->zl_child = cio;
+
+ mutex_enter(&cio->io_lock);
mutex_enter(&pio->io_lock);
- if (zio->io_stage < ZIO_STAGE_READY)
- pio->io_children[zio->io_child_type][ZIO_WAIT_READY]++;
- if (zio->io_stage < ZIO_STAGE_DONE)
- pio->io_children[zio->io_child_type][ZIO_WAIT_DONE]++;
- zio->io_sibling_prev = NULL;
- zio->io_sibling_next = pio->io_child;
- if (pio->io_child != NULL)
- pio->io_child->io_sibling_prev = zio;
- pio->io_child = zio;
- zio->io_parent = pio;
+
+ ASSERT(pio->io_state[ZIO_WAIT_DONE] == 0);
+
+ 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);
+ list_insert_head(&cio->io_parent_list, zl);
+
mutex_exit(&pio->io_lock);
+ mutex_exit(&cio->io_lock);
}
static void
-zio_remove_child(zio_t *pio, zio_t *zio)
+zio_remove_child(zio_t *pio, zio_t *cio, zio_link_t *zl)
{
- zio_t *next, *prev;
-
- ASSERT(zio->io_parent == pio);
+ ASSERT(zl->zl_parent == pio);
+ ASSERT(zl->zl_child == cio);
+ mutex_enter(&cio->io_lock);
mutex_enter(&pio->io_lock);
- next = zio->io_sibling_next;
- prev = zio->io_sibling_prev;
- if (next != NULL)
- next->io_sibling_prev = prev;
- if (prev != NULL)
- prev->io_sibling_next = next;
- if (pio->io_child == zio)
- pio->io_child = next;
+
+ list_remove(&pio->io_child_list, zl);
+ list_remove(&cio->io_parent_list, zl);
+
mutex_exit(&pio->io_lock);
+ mutex_exit(&cio->io_lock);
+
+ kmem_cache_free(zio_link_cache, zl);
}
static boolean_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));
+
if (vd != NULL)
zio->io_child_type = ZIO_CHILD_VDEV;
else if (flags & ZIO_FLAG_GANG_CHILD)
zio->io_orig_stage = zio->io_stage = stage;
zio->io_orig_pipeline = zio->io_pipeline = pipeline;
+ zio->io_state[ZIO_WAIT_READY] = (stage >= ZIO_STAGE_READY);
+ zio->io_state[ZIO_WAIT_DONE] = (stage >= ZIO_STAGE_DONE);
+
if (zb != NULL)
zio->io_bookmark = *zb;
if (pio != NULL) {
- /*
- * Logical I/Os can have logical, gang, or vdev children.
- * Gang I/Os can have gang or vdev children.
- * Vdev I/Os can only have vdev children.
- * The following ASSERT captures all of these constraints.
- */
- ASSERT(zio->io_child_type <= pio->io_child_type);
if (zio->io_logical == NULL)
zio->io_logical = pio->io_logical;
zio_add_child(pio, zio);
spa_t *spa = zio->io_spa;
uint8_t async_root = zio->io_async_root;
+ 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_null(zio_t *pio, spa_t *spa, zio_done_func_t *done, void *private,
- int flags)
+zio_null(zio_t *pio, spa_t *spa, vdev_t *vd, zio_done_func_t *done,
+ void *private, int flags)
{
zio_t *zio;
zio = zio_create(pio, spa, 0, NULL, NULL, 0, done, private,
- ZIO_TYPE_NULL, ZIO_PRIORITY_NOW, flags, NULL, 0, NULL,
+ ZIO_TYPE_NULL, ZIO_PRIORITY_NOW, flags, vd, 0, NULL,
ZIO_STAGE_OPEN, ZIO_INTERLOCK_PIPELINE);
return (zio);
zio_t *
zio_root(spa_t *spa, zio_done_func_t *done, void *private, int flags)
{
- return (zio_null(NULL, spa, done, private, flags));
+ return (zio_null(NULL, spa, NULL, done, private, flags));
}
zio_t *
ASSERT(!BP_IS_HOLE(bp));
if (bp->blk_fill == BLK_FILL_ALREADY_FREED)
- return (zio_null(pio, spa, NULL, NULL, flags));
+ return (zio_null(pio, spa, NULL, NULL, NULL, flags));
if (txg == spa->spa_syncing_txg &&
spa_sync_pass(spa) > SYNC_PASS_DEFERRED_FREE) {
bplist_enqueue_deferred(&spa->spa_sync_bplist, bp);
- return (zio_null(pio, spa, NULL, NULL, flags));
+ return (zio_null(pio, spa, NULL, NULL, NULL, flags));
}
zio = zio_create(pio, spa, txg, bp, NULL, BP_GET_PSIZE(bp),
zio->io_cmd = cmd;
} else {
- zio = zio_null(pio, spa, NULL, NULL, flags);
+ zio = zio_null(pio, spa, NULL, NULL, NULL, flags);
for (c = 0; c < vd->vdev_children; c++)
zio_nowait(zio_ioctl(zio, spa, vd->vdev_child[c], cmd,
{
ASSERT(zio->io_executor == NULL);
- if (zio->io_parent == NULL && zio->io_child_type == ZIO_CHILD_LOGICAL) {
+ if (zio->io_child_type == ZIO_CHILD_LOGICAL &&
+ zio_unique_parent(zio) == NULL) {
/*
* This is a logical async I/O with no parent to wait for it.
- * Attach it to the pool's global async root zio so that
- * spa_unload() has a way of waiting for async I/O to finish.
+ * Track how many outstanding I/Os of this type exist so
+ * that spa_unload() knows when they are all done.
*/
spa_t *spa = zio->io_spa;
zio->io_async_root = B_TRUE;
static void
zio_reexecute(zio_t *pio)
{
- zio_t *zio, *zio_next;
+ zio_t *cio, *cio_next;
+
+ ASSERT(pio->io_child_type == ZIO_CHILD_LOGICAL);
+ ASSERT(pio->io_orig_stage == ZIO_STAGE_OPEN);
pio->io_flags = pio->io_orig_flags;
pio->io_stage = pio->io_orig_stage;
pio->io_pipeline = pio->io_orig_pipeline;
pio->io_reexecute = 0;
pio->io_error = 0;
+ for (int w = 0; w < ZIO_WAIT_TYPES; w++)
+ pio->io_state[w] = 0;
for (int c = 0; c < ZIO_CHILD_TYPES; c++)
pio->io_child_error[c] = 0;
/*
* As we reexecute pio's children, new children could be created.
- * New children go to the head of the io_child list, however,
+ * New children go to the head of pio's io_child_list, however,
* so we will (correctly) not reexecute them. The key is that
- * the remainder of the io_child list, from 'zio_next' onward,
- * cannot be affected by any side effects of reexecuting 'zio'.
+ * the remainder of pio's io_child_list, from 'cio_next' onward,
+ * cannot be affected by any side effects of reexecuting 'cio'.
*/
- for (zio = pio->io_child; zio != NULL; zio = zio_next) {
- zio_next = zio->io_sibling_next;
+ for (cio = zio_walk_children(pio); cio != NULL; cio = cio_next) {
+ cio_next = zio_walk_children(pio);
mutex_enter(&pio->io_lock);
- pio->io_children[zio->io_child_type][ZIO_WAIT_READY]++;
- pio->io_children[zio->io_child_type][ZIO_WAIT_DONE]++;
+ for (int w = 0; w < ZIO_WAIT_TYPES; w++)
+ pio->io_children[cio->io_child_type][w]++;
mutex_exit(&pio->io_lock);
- zio_reexecute(zio);
+ zio_reexecute(cio);
}
/*
if (zio != NULL) {
ASSERT(zio != spa->spa_suspend_zio_root);
ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL);
- ASSERT(zio->io_parent == NULL);
+ ASSERT(zio_unique_parent(zio) == NULL);
ASSERT(zio->io_stage == ZIO_STAGE_DONE);
zio_add_child(spa->spa_suspend_zio_root, zio);
}
void
zio_resume(spa_t *spa)
{
- zio_t *pio, *zio;
+ zio_t *pio, *cio, *cio_next;
/*
* Reexecute all previously suspended i/o.
if (pio == NULL)
return;
- while ((zio = pio->io_child) != NULL) {
- zio_remove_child(pio, zio);
- zio->io_parent = NULL;
- zio_reexecute(zio);
+ for (cio = zio_walk_children(pio); cio != NULL; cio = cio_next) {
+ zio_link_t *zl = pio->io_walk_link;
+ cio_next = zio_walk_children(pio);
+ zio_remove_child(pio, cio, zl);
+ zio_reexecute(cio);
}
ASSERT(pio->io_children[ZIO_CHILD_LOGICAL][ZIO_WAIT_DONE] == 0);
zio_t *lio = zio->io_logical;
zio_gang_node_t *gn = zio->io_private;
blkptr_t *bp = zio->io_bp;
+ zio_t *pio = zio_unique_parent(zio);
- ASSERT(zio->io_parent == lio);
- ASSERT(zio->io_child == NULL);
+ ASSERT(pio == lio);
+ ASSERT(zio_walk_children(zio) == NULL);
if (zio->io_error)
return;
static void
zio_write_gang_member_ready(zio_t *zio)
{
- zio_t *pio = zio->io_parent;
+ zio_t *pio = zio_unique_parent(zio);
zio_t *lio = zio->io_logical;
dva_t *cdva = zio->io_bp->blk_dva;
dva_t *pdva = pio->io_bp->blk_dva;
* Read and write to physical devices
* ==========================================================================
*/
-
-static void
-zio_vdev_io_probe_done(zio_t *zio)
-{
- zio_t *dio;
- vdev_t *vd = zio->io_private;
-
- mutex_enter(&vd->vdev_probe_lock);
- ASSERT(vd->vdev_probe_zio == zio);
- vd->vdev_probe_zio = NULL;
- mutex_exit(&vd->vdev_probe_lock);
-
- while ((dio = zio->io_delegate_list) != NULL) {
- zio->io_delegate_list = dio->io_delegate_next;
- dio->io_delegate_next = NULL;
- if (!vdev_accessible(vd, dio))
- dio->io_error = ENXIO;
- zio_execute(dio);
- }
-}
-
-/*
- * Probe the device to determine whether I/O failure is specific to this
- * zio (e.g. a bad sector) or affects the entire vdev (e.g. unplugged).
- */
-static int
-zio_vdev_io_probe(zio_t *zio)
-{
- vdev_t *vd = zio->io_vd;
- zio_t *pio = NULL;
- boolean_t created_pio = B_FALSE;
-
- /*
- * Don't probe the probe.
- */
- if (zio->io_flags & ZIO_FLAG_PROBE)
- return (ZIO_PIPELINE_CONTINUE);
-
- /*
- * To prevent 'probe storms' when a device fails, we create
- * just one probe i/o at a time. All zios that want to probe
- * this vdev will join the probe zio's io_delegate_list.
- */
- mutex_enter(&vd->vdev_probe_lock);
-
- if ((pio = vd->vdev_probe_zio) == NULL) {
- vd->vdev_probe_zio = pio = zio_root(zio->io_spa,
- zio_vdev_io_probe_done, vd, ZIO_FLAG_CANFAIL);
- created_pio = B_TRUE;
- vd->vdev_probe_wanted = B_TRUE;
- spa_async_request(zio->io_spa, SPA_ASYNC_PROBE);
- }
-
- zio->io_delegate_next = pio->io_delegate_list;
- pio->io_delegate_list = zio;
-
- mutex_exit(&vd->vdev_probe_lock);
-
- if (created_pio) {
- zio_nowait(vdev_probe(vd, pio));
- zio_nowait(pio);
- }
-
- return (ZIO_PIPELINE_STOP);
-}
-
static int
zio_vdev_io_start(zio_t *zio)
{
zio->io_txg != 0 && /* not a delegated i/o */
!vdev_dtl_contains(vd, DTL_PARTIAL, zio->io_txg, 1)) {
ASSERT(zio->io_type == ZIO_TYPE_WRITE);
- ASSERT(zio->io_delegate_list == NULL);
zio_vdev_io_bypass(zio);
return (ZIO_PIPELINE_CONTINUE);
}
(zio->io_type == ZIO_TYPE_READ || zio->io_type == ZIO_TYPE_WRITE)) {
if (zio->io_type == ZIO_TYPE_READ && vdev_cache_read(zio) == 0)
- return (ZIO_PIPELINE_STOP);
+ return (ZIO_PIPELINE_CONTINUE);
if ((zio = vdev_queue_io(zio)) == NULL)
return (ZIO_PIPELINE_STOP);
ops->vdev_op_io_done(zio);
if (unexpected_error)
- return (zio_vdev_io_probe(zio));
+ VERIFY(vdev_probe(vd, zio) == NULL);
return (ZIO_PIPELINE_CONTINUE);
}
zio_ready(zio_t *zio)
{
blkptr_t *bp = zio->io_bp;
- zio_t *pio = zio->io_parent;
+ zio_t *pio, *pio_next;
if (zio->io_ready) {
if (BP_IS_GANG(bp) &&
if (zio->io_error)
zio->io_pipeline = ZIO_INTERLOCK_PIPELINE;
- if (pio != NULL)
+ mutex_enter(&zio->io_lock);
+ zio->io_state[ZIO_WAIT_READY] = 1;
+ pio = zio_walk_parents(zio);
+ mutex_exit(&zio->io_lock);
+
+ /*
+ * As we notify zio's parents, new parents could be added.
+ * New parents go to the head of zio's io_parent_list, however,
+ * so we will (correctly) not notify them. The remainder of zio's
+ * io_parent_list, from 'pio_next' onward, cannot change because
+ * 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);
+ }
return (ZIO_PIPELINE_CONTINUE);
}
zio_done(zio_t *zio)
{
spa_t *spa = zio->io_spa;
- zio_t *pio = zio->io_parent;
zio_t *lio = zio->io_logical;
blkptr_t *bp = zio->io_bp;
vdev_t *vd = zio->io_vd;
uint64_t psize = zio->io_size;
+ zio_t *pio, *pio_next;
/*
* If our of children haven't all completed,
ASSERT(bp->blk_pad[1] == 0);
ASSERT(bp->blk_pad[2] == 0);
ASSERT(bcmp(bp, &zio->io_bp_copy, sizeof (blkptr_t)) == 0 ||
- (pio != NULL && bp == pio->io_bp));
+ (bp == zio_unique_parent(zio)->io_bp));
if (zio->io_type == ZIO_TYPE_WRITE && !BP_IS_HOLE(bp) &&
!(zio->io_flags & ZIO_FLAG_IO_REPAIR)) {
ASSERT(!BP_SHOULD_BYTESWAP(bp));
zio_gang_tree_free(&zio->io_gang_tree);
- if (pio != NULL) {
+ mutex_enter(&zio->io_lock);
+ zio->io_state[ZIO_WAIT_DONE] = 1;
+ mutex_exit(&zio->io_lock);
+
+ if ((pio = zio_unique_parent(zio)) != NULL) {
/*
* We're not a root i/o, so there's nothing to do
* but notify our parent. Don't propagate errors
return (ZIO_PIPELINE_STOP);
}
- ASSERT(zio->io_child == NULL);
+ ASSERT(zio_walk_children(zio) == NULL);
ASSERT(zio->io_reexecute == 0);
ASSERT(zio->io_error == 0 || (zio->io_flags & ZIO_FLAG_CANFAIL));
+ /*
+ * It is the responsibility of the done callback to ensure that this
+ * particular zio is no longer discoverable for adoption, and as
+ * such, cannot acquire any new parents.
+ */
if (zio->io_done)
zio->io_done(zio);
zio_gang_tree_free(&zio->io_gang_tree);
- ASSERT(zio->io_delegate_list == NULL);
- ASSERT(zio->io_delegate_next == NULL);
+ mutex_enter(&zio->io_lock);
+ zio->io_state[ZIO_WAIT_DONE] = 1;
+ mutex_exit(&zio->io_lock);
- if (pio != NULL) {
- zio_remove_child(pio, zio);
+ 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);
}
* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
break;
}
zfs_range_unlock(rl);
+ if (!zil_disable)
+ zil_commit(zv->zv_zilog, UINT64_MAX, ZVOL_OBJ);
return (error);
}
git://git.camperquake.de / zfs.git / commitdiff