*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012 by Delphix. All rights reserved.
+ * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
+ * Copyright (c) 2014, Nexenta Systems, Inc. All rights reserved.
+ * Copyright (c) 2015 by Chunwei Chen. All rights reserved.
*/
#include <sys/dmu.h>
#include <sys/zfs_ioctl.h>
#include <sys/zap.h>
#include <sys/zio_checksum.h>
+#include <sys/zio_compress.h>
#include <sys/sa.h>
+#include <sys/zfeature.h>
#ifdef _KERNEL
#include <sys/vmsystm.h>
#include <sys/zfs_znode.h>
#endif
+/*
+ * Enable/disable nopwrite feature.
+ */
+int zfs_nopwrite_enabled = 1;
+
const dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES] = {
{ DMU_BSWAP_UINT8, TRUE, "unallocated" },
{ DMU_BSWAP_ZAP, TRUE, "object directory" },
};
int
-dmu_buf_hold(objset_t *os, uint64_t object, uint64_t offset,
- void *tag, dmu_buf_t **dbp, int flags)
+dmu_buf_hold_noread(objset_t *os, uint64_t object, uint64_t offset,
+ void *tag, dmu_buf_t **dbp)
{
dnode_t *dn;
uint64_t blkid;
dmu_buf_impl_t *db;
int err;
- int db_flags = DB_RF_CANFAIL;
-
- if (flags & DMU_READ_NO_PREFETCH)
- db_flags |= DB_RF_NOPREFETCH;
err = dnode_hold(os, object, FTAG, &dn);
if (err)
rw_enter(&dn->dn_struct_rwlock, RW_READER);
db = dbuf_hold(dn, blkid, tag);
rw_exit(&dn->dn_struct_rwlock);
+ dnode_rele(dn, FTAG);
+
if (db == NULL) {
- err = EIO;
- } else {
+ *dbp = NULL;
+ return (SET_ERROR(EIO));
+ }
+
+ *dbp = &db->db;
+ return (err);
+}
+
+int
+dmu_buf_hold(objset_t *os, uint64_t object, uint64_t offset,
+ void *tag, dmu_buf_t **dbp, int flags)
+{
+ int err;
+ int db_flags = DB_RF_CANFAIL;
+
+ if (flags & DMU_READ_NO_PREFETCH)
+ db_flags |= DB_RF_NOPREFETCH;
+
+ err = dmu_buf_hold_noread(os, object, offset, tag, dbp);
+ if (err == 0) {
+ dmu_buf_impl_t *db = (dmu_buf_impl_t *)(*dbp);
err = dbuf_read(db, NULL, db_flags);
- if (err) {
+ if (err != 0) {
dbuf_rele(db, tag);
- db = NULL;
+ *dbp = NULL;
}
}
- dnode_rele(dn, FTAG);
- *dbp = &db->db; /* NULL db plus first field offset is NULL */
return (err);
}
dn = DB_DNODE(db);
if (dn->dn_bonus != db) {
- error = EINVAL;
+ error = SET_ERROR(EINVAL);
} else if (newsize < 0 || newsize > db_fake->db_size) {
- error = EINVAL;
+ error = SET_ERROR(EINVAL);
} else {
dnode_setbonuslen(dn, newsize, tx);
error = 0;
dn = DB_DNODE(db);
if (!DMU_OT_IS_VALID(type)) {
- error = EINVAL;
+ error = SET_ERROR(EINVAL);
} else if (dn->dn_bonus != db) {
- error = EINVAL;
+ error = SET_ERROR(EINVAL);
} else {
dnode_setbonus_type(dn, type, tx);
error = 0;
/* as long as the bonus buf is held, the dnode will be held */
if (refcount_add(&db->db_holds, tag) == 1) {
VERIFY(dnode_add_ref(dn, db));
- (void) atomic_inc_32_nv(&dn->dn_dbufs_count);
+ atomic_inc_32(&dn->dn_dbufs_count);
}
/*
dn = DB_DNODE(db);
if (spa_version(dn->dn_objset->os_spa) < SPA_VERSION_SA) {
- err = EINVAL;
+ err = SET_ERROR(EINVAL);
} else {
rw_enter(&dn->dn_struct_rwlock, RW_READER);
if (!dn->dn_have_spill) {
- err = ENOENT;
+ err = SET_ERROR(ENOENT);
} else {
err = dmu_spill_hold_by_dnode(dn,
DB_RF_HAVESTRUCT | DB_RF_CANFAIL, tag, dbp);
dmu_buf_hold_array_by_dnode(dnode_t *dn, uint64_t offset, uint64_t length,
int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp, uint32_t flags)
{
- dsl_pool_t *dp = NULL;
dmu_buf_t **dbp;
uint64_t blkid, nblks, i;
uint32_t dbuf_flags;
int err;
zio_t *zio;
- hrtime_t start = 0;
ASSERT(length <= DMU_MAX_ACCESS);
(longlong_t)dn->dn_object, dn->dn_datablksz,
(longlong_t)offset, (longlong_t)length);
rw_exit(&dn->dn_struct_rwlock);
- return (EIO);
+ return (SET_ERROR(EIO));
}
nblks = 1;
}
- dbp = kmem_zalloc(sizeof (dmu_buf_t *) * nblks, KM_PUSHPAGE | KM_NODEBUG);
+ dbp = kmem_zalloc(sizeof (dmu_buf_t *) * nblks, KM_SLEEP);
- if (dn->dn_objset->os_dsl_dataset)
- dp = dn->dn_objset->os_dsl_dataset->ds_dir->dd_pool;
- if (dp && dsl_pool_sync_context(dp))
- start = gethrtime();
zio = zio_root(dn->dn_objset->os_spa, NULL, NULL, ZIO_FLAG_CANFAIL);
blkid = dbuf_whichblock(dn, offset);
for (i = 0; i < nblks; i++) {
rw_exit(&dn->dn_struct_rwlock);
dmu_buf_rele_array(dbp, nblks, tag);
zio_nowait(zio);
- return (EIO);
+ return (SET_ERROR(EIO));
}
/* initiate async i/o */
if (read) {
/* wait for async i/o */
err = zio_wait(zio);
- /* track read overhead when we are in sync context */
- if (dp && dsl_pool_sync_context(dp))
- dp->dp_read_overhead += gethrtime() - start;
if (err) {
dmu_buf_rele_array(dbp, nblks, tag);
return (err);
db->db_state == DB_FILL)
cv_wait(&db->db_changed, &db->db_mtx);
if (db->db_state == DB_UNCACHED)
- err = EIO;
+ err = SET_ERROR(EIO);
mutex_exit(&db->db_mtx);
if (err) {
dmu_buf_rele_array(dbp, nblks, tag);
kmem_free(dbp, sizeof (dmu_buf_t *) * numbufs);
}
+/*
+ * Issue prefetch i/os for the given blocks.
+ *
+ * Note: The assumption is that we *know* these blocks will be needed
+ * almost immediately. Therefore, the prefetch i/os will be issued at
+ * ZIO_PRIORITY_SYNC_READ
+ *
+ * Note: indirect blocks and other metadata will be read synchronously,
+ * causing this function to block if they are not already cached.
+ */
void
dmu_prefetch(objset_t *os, uint64_t object, uint64_t offset, uint64_t len)
{
dnode_t *dn;
uint64_t blkid;
- int nblks, i, err;
+ int nblks, err;
if (zfs_prefetch_disable)
return;
rw_enter(&dn->dn_struct_rwlock, RW_READER);
blkid = dbuf_whichblock(dn, object * sizeof (dnode_phys_t));
- dbuf_prefetch(dn, blkid);
+ dbuf_prefetch(dn, blkid, ZIO_PRIORITY_SYNC_READ);
rw_exit(&dn->dn_struct_rwlock);
return;
}
rw_enter(&dn->dn_struct_rwlock, RW_READER);
if (dn->dn_datablkshift) {
int blkshift = dn->dn_datablkshift;
- nblks = (P2ROUNDUP(offset+len, 1<<blkshift) -
- P2ALIGN(offset, 1<<blkshift)) >> blkshift;
+ nblks = (P2ROUNDUP(offset + len, 1 << blkshift) -
+ P2ALIGN(offset, 1 << blkshift)) >> blkshift;
} else {
nblks = (offset < dn->dn_datablksz);
}
if (nblks != 0) {
+ int i;
+
blkid = dbuf_whichblock(dn, offset);
for (i = 0; i < nblks; i++)
- dbuf_prefetch(dn, blkid+i);
+ dbuf_prefetch(dn, blkid + i, ZIO_PRIORITY_SYNC_READ);
}
rw_exit(&dn->dn_struct_rwlock);
* the end so that the file gets shorter over time (if we crashes in the
* middle, this will leave us in a better state). We find allocated file
* data by simply searching the allocated level 1 indirects.
+ *
+ * On input, *start should be the first offset that does not need to be
+ * freed (e.g. "offset + length"). On return, *start will be the first
+ * offset that should be freed.
*/
static int
-get_next_chunk(dnode_t *dn, uint64_t *start, uint64_t limit)
+get_next_chunk(dnode_t *dn, uint64_t *start, uint64_t minimum)
{
- uint64_t len = *start - limit;
- uint64_t blkcnt = 0;
- uint64_t maxblks = DMU_MAX_ACCESS / (1ULL << (dn->dn_indblkshift + 1));
+ uint64_t maxblks = DMU_MAX_ACCESS >> (dn->dn_indblkshift + 1);
+ /* bytes of data covered by a level-1 indirect block */
uint64_t iblkrange =
dn->dn_datablksz * EPB(dn->dn_indblkshift, SPA_BLKPTRSHIFT);
+ uint64_t blks;
- ASSERT(limit <= *start);
+ ASSERT3U(minimum, <=, *start);
- if (len <= iblkrange * maxblks) {
- *start = limit;
+ if (*start - minimum <= iblkrange * maxblks) {
+ *start = minimum;
return (0);
}
ASSERT(ISP2(iblkrange));
- while (*start > limit && blkcnt < maxblks) {
+ for (blks = 0; *start > minimum && blks < maxblks; blks++) {
int err;
- /* find next allocated L1 indirect */
+ /*
+ * dnode_next_offset(BACKWARDS) will find an allocated L1
+ * indirect block at or before the input offset. We must
+ * decrement *start so that it is at the end of the region
+ * to search.
+ */
+ (*start)--;
err = dnode_next_offset(dn,
DNODE_FIND_BACKWARDS, start, 2, 1, 0);
- /* if there are no more, then we are done */
+ /* if there are no indirect blocks before start, we are done */
if (err == ESRCH) {
- *start = limit;
- return (0);
- } else if (err) {
+ *start = minimum;
+ break;
+ } else if (err != 0) {
return (err);
}
- blkcnt += 1;
- /* reset offset to end of "next" block back */
+ /* set start to the beginning of this L1 indirect */
*start = P2ALIGN(*start, iblkrange);
- if (*start <= limit)
- *start = limit;
- else
- *start -= 1;
}
+ if (*start < minimum)
+ *start = minimum;
return (0);
}
static int
dmu_free_long_range_impl(objset_t *os, dnode_t *dn, uint64_t offset,
- uint64_t length, boolean_t free_dnode)
+ uint64_t length)
{
- dmu_tx_t *tx;
- uint64_t object_size, start, end, len;
- boolean_t trunc = (length == DMU_OBJECT_END);
- int align, err;
-
- align = 1 << dn->dn_datablkshift;
- ASSERT(align > 0);
- object_size = align == 1 ? dn->dn_datablksz :
- (dn->dn_maxblkid + 1) << dn->dn_datablkshift;
-
- end = offset + length;
- if (trunc || end > object_size)
- end = object_size;
- if (end <= offset)
+ uint64_t object_size;
+ int err;
+
+ if (dn == NULL)
+ return (SET_ERROR(EINVAL));
+
+ object_size = (dn->dn_maxblkid + 1) * dn->dn_datablksz;
+ if (offset >= object_size)
return (0);
- length = end - offset;
- while (length) {
- start = end;
- /* assert(offset <= start) */
- err = get_next_chunk(dn, &start, offset);
+ if (length == DMU_OBJECT_END || offset + length > object_size)
+ length = object_size - offset;
+
+ while (length != 0) {
+ uint64_t chunk_end, chunk_begin;
+ dmu_tx_t *tx;
+
+ chunk_end = chunk_begin = offset + length;
+
+ /* move chunk_begin backwards to the beginning of this chunk */
+ err = get_next_chunk(dn, &chunk_begin, offset);
if (err)
return (err);
- len = trunc ? DMU_OBJECT_END : end - start;
+ ASSERT3U(chunk_begin, >=, offset);
+ ASSERT3U(chunk_begin, <=, chunk_end);
tx = dmu_tx_create(os);
- dmu_tx_hold_free(tx, dn->dn_object, start, len);
+ dmu_tx_hold_free(tx, dn->dn_object,
+ chunk_begin, chunk_end - chunk_begin);
err = dmu_tx_assign(tx, TXG_WAIT);
if (err) {
dmu_tx_abort(tx);
return (err);
}
-
- dnode_free_range(dn, start, trunc ? -1 : len, tx);
-
- if (start == 0 && free_dnode) {
- ASSERT(trunc);
- dnode_free(dn, tx);
- }
-
- length -= end - start;
-
+ dnode_free_range(dn, chunk_begin, chunk_end - chunk_begin, tx);
dmu_tx_commit(tx);
- end = start;
+
+ length -= chunk_end - chunk_begin;
}
return (0);
}
err = dnode_hold(os, object, FTAG, &dn);
if (err != 0)
return (err);
- err = dmu_free_long_range_impl(os, dn, offset, length, FALSE);
+ err = dmu_free_long_range_impl(os, dn, offset, length);
+
+ /*
+ * It is important to zero out the maxblkid when freeing the entire
+ * file, so that (a) subsequent calls to dmu_free_long_range_impl()
+ * will take the fast path, and (b) dnode_reallocate() can verify
+ * that the entire file has been freed.
+ */
+ if (err == 0 && offset == 0 && length == DMU_OBJECT_END)
+ dn->dn_maxblkid = 0;
+
dnode_rele(dn, FTAG);
return (err);
}
int
-dmu_free_object(objset_t *os, uint64_t object)
+dmu_free_long_object(objset_t *os, uint64_t object)
{
- dnode_t *dn;
dmu_tx_t *tx;
int err;
- err = dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED,
- FTAG, &dn);
+ err = dmu_free_long_range(os, object, 0, DMU_OBJECT_END);
if (err != 0)
return (err);
- if (dn->dn_nlevels == 1) {
- tx = dmu_tx_create(os);
- dmu_tx_hold_bonus(tx, object);
- dmu_tx_hold_free(tx, dn->dn_object, 0, DMU_OBJECT_END);
- err = dmu_tx_assign(tx, TXG_WAIT);
- if (err == 0) {
- dnode_free_range(dn, 0, DMU_OBJECT_END, tx);
- dnode_free(dn, tx);
- dmu_tx_commit(tx);
- } else {
- dmu_tx_abort(tx);
- }
+
+ tx = dmu_tx_create(os);
+ dmu_tx_hold_bonus(tx, object);
+ dmu_tx_hold_free(tx, object, 0, DMU_OBJECT_END);
+ err = dmu_tx_assign(tx, TXG_WAIT);
+ if (err == 0) {
+ err = dmu_object_free(os, object, tx);
+ dmu_tx_commit(tx);
} else {
- err = dmu_free_long_range_impl(os, dn, 0, DMU_OBJECT_END, TRUE);
+ dmu_tx_abort(tx);
}
- dnode_rele(dn, FTAG);
+
return (err);
}
* handle that here as well.
*/
if (dn->dn_maxblkid == 0) {
- int newsz = offset > dn->dn_datablksz ? 0 :
+ uint64_t newsz = offset > dn->dn_datablksz ? 0 :
MIN(size, dn->dn_datablksz - offset);
bzero((char *)buf + newsz, size - newsz);
size = newsz;
break;
for (i = 0; i < numbufs; i++) {
- int tocpy;
- int bufoff;
+ uint64_t tocpy;
+ int64_t bufoff;
dmu_buf_t *db = dbp[i];
ASSERT(size > 0);
bufoff = offset - db->db_offset;
- tocpy = (int)MIN(db->db_size - bufoff, size);
+ tocpy = MIN(db->db_size - bufoff, size);
- bcopy((char *)db->db_data + bufoff, buf, tocpy);
+ (void) memcpy(buf, (char *)db->db_data + bufoff, tocpy);
offset += tocpy;
size -= tocpy;
if (size == 0)
return;
- VERIFY(0 == dmu_buf_hold_array(os, object, offset, size,
+ VERIFY0(dmu_buf_hold_array(os, object, offset, size,
FALSE, FTAG, &numbufs, &dbp));
for (i = 0; i < numbufs; i++) {
- int tocpy;
- int bufoff;
+ uint64_t tocpy;
+ int64_t bufoff;
dmu_buf_t *db = dbp[i];
ASSERT(size > 0);
bufoff = offset - db->db_offset;
- tocpy = (int)MIN(db->db_size - bufoff, size);
+ tocpy = MIN(db->db_size - bufoff, size);
ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size);
dmu_buf_rele_array(dbp, numbufs, FTAG);
}
+void
+dmu_write_embedded(objset_t *os, uint64_t object, uint64_t offset,
+ void *data, uint8_t etype, uint8_t comp, int uncompressed_size,
+ int compressed_size, int byteorder, dmu_tx_t *tx)
+{
+ dmu_buf_t *db;
+
+ ASSERT3U(etype, <, NUM_BP_EMBEDDED_TYPES);
+ ASSERT3U(comp, <, ZIO_COMPRESS_FUNCTIONS);
+ VERIFY0(dmu_buf_hold_noread(os, object, offset,
+ FTAG, &db));
+
+ dmu_buf_write_embedded(db,
+ data, (bp_embedded_type_t)etype, (enum zio_compress)comp,
+ uncompressed_size, compressed_size, byteorder, tx);
+
+ dmu_buf_rele(db, FTAG);
+}
+
/*
* DMU support for xuio
*/
{ "write_buf_nocopy", KSTAT_DATA_UINT64 }
};
-#define XUIOSTAT_INCR(stat, val) \
- atomic_add_64(&xuio_stats.stat.value.ui64, (val))
-#define XUIOSTAT_BUMP(stat) XUIOSTAT_INCR(stat, 1)
+#define XUIOSTAT_INCR(stat, val) \
+ atomic_add_64(&xuio_stats.stat.value.ui64, (val))
+#define XUIOSTAT_BUMP(stat) XUIOSTAT_INCR(stat, 1)
int
dmu_xuio_init(xuio_t *xuio, int nblk)
uio_t *uio = &xuio->xu_uio;
uio->uio_iovcnt = nblk;
- uio->uio_iov = kmem_zalloc(nblk * sizeof (iovec_t), KM_PUSHPAGE);
+ uio->uio_iov = kmem_zalloc(nblk * sizeof (iovec_t), KM_SLEEP);
- priv = kmem_zalloc(sizeof (dmu_xuio_t), KM_PUSHPAGE);
+ priv = kmem_zalloc(sizeof (dmu_xuio_t), KM_SLEEP);
priv->cnt = nblk;
- priv->bufs = kmem_zalloc(nblk * sizeof (arc_buf_t *), KM_PUSHPAGE);
- priv->iovp = uio->uio_iov;
+ priv->bufs = kmem_zalloc(nblk * sizeof (arc_buf_t *), KM_SLEEP);
+ priv->iovp = (iovec_t *)uio->uio_iov;
XUIO_XUZC_PRIV(xuio) = priv;
if (XUIO_XUZC_RW(xuio) == UIO_READ)
ASSERT(i < priv->cnt);
ASSERT(off + n <= arc_buf_size(abuf));
- iov = uio->uio_iov + i;
+ iov = (iovec_t *)uio->uio_iov + i;
iov->iov_base = (char *)abuf->b_data + off;
iov->iov_len = n;
priv->bufs[i] = abuf;
/*
* Copy up to size bytes between arg_buf and req based on the data direction
- * described by the req. If an entire req's data cannot be transfered the
- * req's is updated such that it's current index and bv offsets correctly
- * reference any residual data which could not be copied. The return value
- * is the number of bytes successfully copied to arg_buf.
+ * described by the req. If an entire req's data cannot be transfered in one
+ * pass, you should pass in @req_offset to indicate where to continue. The
+ * return value is the number of bytes successfully copied to arg_buf.
*/
static int
-dmu_req_copy(void *arg_buf, int size, int *offset, struct request *req)
+dmu_bio_copy(void *arg_buf, int size, struct bio *bio, size_t bio_offset)
{
- struct bio_vec *bv;
- struct req_iterator iter;
+ struct bio_vec bv, *bvp = &bv;
+ bvec_iterator_t iter;
char *bv_buf;
- int tocpy;
+ int tocpy, bv_len, bv_offset;
+ int offset = 0;
- *offset = 0;
- rq_for_each_segment(bv, req, iter) {
+ bio_for_each_segment4(bv, bvp, bio, iter) {
- /* Fully consumed the passed arg_buf */
- ASSERT3S(*offset, <=, size);
- if (size == *offset)
- break;
+ /*
+ * Fully consumed the passed arg_buf. We use goto here because
+ * rq_for_each_segment is a double loop
+ */
+ ASSERT3S(offset, <=, size);
+ if (size == offset)
+ goto out;
- /* Skip fully consumed bv's */
- if (bv->bv_len == 0)
+ /* Skip already copied bvp */
+ if (bio_offset >= bvp->bv_len) {
+ bio_offset -= bvp->bv_len;
continue;
+ }
+
+ bv_len = bvp->bv_len - bio_offset;
+ bv_offset = bvp->bv_offset + bio_offset;
+ bio_offset = 0;
- tocpy = MIN(bv->bv_len, size - *offset);
+ tocpy = MIN(bv_len, size - offset);
ASSERT3S(tocpy, >=, 0);
- bv_buf = page_address(bv->bv_page) + bv->bv_offset;
+ bv_buf = page_address(bvp->bv_page) + bv_offset;
ASSERT3P(bv_buf, !=, NULL);
- if (rq_data_dir(req) == WRITE)
- memcpy(arg_buf + *offset, bv_buf, tocpy);
+ if (bio_data_dir(bio) == WRITE)
+ memcpy(arg_buf + offset, bv_buf, tocpy);
else
- memcpy(bv_buf, arg_buf + *offset, tocpy);
-
- *offset += tocpy;
- bv->bv_offset += tocpy;
- bv->bv_len -= tocpy;
- }
-
- return 0;
-}
-
-static void
-dmu_bio_put(struct bio *bio)
-{
- struct bio *bio_next;
+ memcpy(bv_buf, arg_buf + offset, tocpy);
- while (bio) {
- bio_next = bio->bi_next;
- bio_put(bio);
- bio = bio_next;
- }
-}
-
-static int
-dmu_bio_clone(struct bio *bio, struct bio **bio_copy)
-{
- struct bio *bio_root = NULL;
- struct bio *bio_last = NULL;
- struct bio *bio_new;
-
- if (bio == NULL)
- return EINVAL;
-
- while (bio) {
- bio_new = bio_clone(bio, GFP_NOIO);
- if (bio_new == NULL) {
- dmu_bio_put(bio_root);
- return ENOMEM;
- }
-
- if (bio_last) {
- bio_last->bi_next = bio_new;
- bio_last = bio_new;
- } else {
- bio_root = bio_new;
- bio_last = bio_new;
- }
-
- bio = bio->bi_next;
+ offset += tocpy;
}
-
- *bio_copy = bio_root;
-
- return 0;
+out:
+ return (offset);
}
int
-dmu_read_req(objset_t *os, uint64_t object, struct request *req)
+dmu_read_bio(objset_t *os, uint64_t object, struct bio *bio)
{
- uint64_t size = blk_rq_bytes(req);
- uint64_t offset = blk_rq_pos(req) << 9;
- struct bio *bio_saved = req->bio;
+ uint64_t offset = BIO_BI_SECTOR(bio) << 9;
+ uint64_t size = BIO_BI_SIZE(bio);
dmu_buf_t **dbp;
int numbufs, i, err;
+ size_t bio_offset;
/*
* NB: we could do this block-at-a-time, but it's nice
* to be reading in parallel.
*/
err = dmu_buf_hold_array(os, object, offset, size, TRUE, FTAG,
- &numbufs, &dbp);
+ &numbufs, &dbp);
if (err)
return (err);
- /*
- * Clone the bio list so the bv->bv_offset and bv->bv_len members
- * can be safely modified. The original bio list is relinked in to
- * the request when the function exits. This is required because
- * some file systems blindly assume that these values will remain
- * constant between bio_submit() and the IO completion callback.
- */
- err = dmu_bio_clone(bio_saved, &req->bio);
- if (err)
- goto error;
-
+ bio_offset = 0;
for (i = 0; i < numbufs; i++) {
- int tocpy, didcpy, bufoff;
+ uint64_t tocpy;
+ int64_t bufoff;
+ int didcpy;
dmu_buf_t *db = dbp[i];
bufoff = offset - db->db_offset;
ASSERT3S(bufoff, >=, 0);
- tocpy = (int)MIN(db->db_size - bufoff, size);
+ tocpy = MIN(db->db_size - bufoff, size);
if (tocpy == 0)
break;
- err = dmu_req_copy(db->db_data + bufoff, tocpy, &didcpy, req);
+ didcpy = dmu_bio_copy(db->db_data + bufoff, tocpy, bio,
+ bio_offset);
if (didcpy < tocpy)
err = EIO;
size -= tocpy;
offset += didcpy;
+ bio_offset += didcpy;
err = 0;
}
-
- dmu_bio_put(req->bio);
- req->bio = bio_saved;
-error:
dmu_buf_rele_array(dbp, numbufs, FTAG);
return (err);
}
int
-dmu_write_req(objset_t *os, uint64_t object, struct request *req, dmu_tx_t *tx)
+dmu_write_bio(objset_t *os, uint64_t object, struct bio *bio, dmu_tx_t *tx)
{
- uint64_t size = blk_rq_bytes(req);
- uint64_t offset = blk_rq_pos(req) << 9;
- struct bio *bio_saved = req->bio;
+ uint64_t offset = BIO_BI_SECTOR(bio) << 9;
+ uint64_t size = BIO_BI_SIZE(bio);
dmu_buf_t **dbp;
- int numbufs;
- int err = 0;
- int i;
+ int numbufs, i, err;
+ size_t bio_offset;
if (size == 0)
return (0);
err = dmu_buf_hold_array(os, object, offset, size, FALSE, FTAG,
- &numbufs, &dbp);
+ &numbufs, &dbp);
if (err)
return (err);
- /*
- * Clone the bio list so the bv->bv_offset and bv->bv_len members
- * can be safely modified. The original bio list is relinked in to
- * the request when the function exits. This is required because
- * some file systems blindly assume that these values will remain
- * constant between bio_submit() and the IO completion callback.
- */
- err = dmu_bio_clone(bio_saved, &req->bio);
- if (err)
- goto error;
-
+ bio_offset = 0;
for (i = 0; i < numbufs; i++) {
- int tocpy, didcpy, bufoff;
+ uint64_t tocpy;
+ int64_t bufoff;
+ int didcpy;
dmu_buf_t *db = dbp[i];
bufoff = offset - db->db_offset;
ASSERT3S(bufoff, >=, 0);
- tocpy = (int)MIN(db->db_size - bufoff, size);
+ tocpy = MIN(db->db_size - bufoff, size);
if (tocpy == 0)
break;
else
dmu_buf_will_dirty(db, tx);
- err = dmu_req_copy(db->db_data + bufoff, tocpy, &didcpy, req);
+ didcpy = dmu_bio_copy(db->db_data + bufoff, tocpy, bio,
+ bio_offset);
if (tocpy == db->db_size)
dmu_buf_fill_done(db, tx);
size -= tocpy;
offset += didcpy;
+ bio_offset += didcpy;
err = 0;
}
- dmu_bio_put(req->bio);
- req->bio = bio_saved;
-error:
dmu_buf_rele_array(dbp, numbufs, FTAG);
-
return (err);
}
-int
-dmu_read_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size)
+static int
+dmu_read_uio_dnode(dnode_t *dn, uio_t *uio, uint64_t size)
{
dmu_buf_t **dbp;
int numbufs, i, err;
* NB: we could do this block-at-a-time, but it's nice
* to be reading in parallel.
*/
- err = dmu_buf_hold_array(os, object, uio->uio_loffset, size, TRUE, FTAG,
- &numbufs, &dbp);
+ err = dmu_buf_hold_array_by_dnode(dn, uio->uio_loffset, size,
+ TRUE, FTAG, &numbufs, &dbp, 0);
if (err)
return (err);
for (i = 0; i < numbufs; i++) {
- int tocpy;
- int bufoff;
+ uint64_t tocpy;
+ int64_t bufoff;
dmu_buf_t *db = dbp[i];
ASSERT(size > 0);
bufoff = uio->uio_loffset - db->db_offset;
- tocpy = (int)MIN(db->db_size - bufoff, size);
+ tocpy = MIN(db->db_size - bufoff, size);
if (xuio) {
dmu_buf_impl_t *dbi = (dmu_buf_impl_t *)db;
return (err);
}
+/*
+ * Read 'size' bytes into the uio buffer.
+ * From object zdb->db_object.
+ * Starting at offset uio->uio_loffset.
+ *
+ * If the caller already has a dbuf in the target object
+ * (e.g. its bonus buffer), this routine is faster than dmu_read_uio(),
+ * because we don't have to find the dnode_t for the object.
+ */
+int
+dmu_read_uio_dbuf(dmu_buf_t *zdb, uio_t *uio, uint64_t size)
+{
+ dmu_buf_impl_t *db = (dmu_buf_impl_t *)zdb;
+ dnode_t *dn;
+ int err;
+
+ if (size == 0)
+ return (0);
+
+ DB_DNODE_ENTER(db);
+ dn = DB_DNODE(db);
+ err = dmu_read_uio_dnode(dn, uio, size);
+ DB_DNODE_EXIT(db);
+
+ return (err);
+}
+
+/*
+ * Read 'size' bytes into the uio buffer.
+ * From the specified object
+ * Starting at offset uio->uio_loffset.
+ */
+int
+dmu_read_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size)
+{
+ dnode_t *dn;
+ int err;
+
+ if (size == 0)
+ return (0);
+
+ err = dnode_hold(os, object, FTAG, &dn);
+ if (err)
+ return (err);
+
+ err = dmu_read_uio_dnode(dn, uio, size);
+
+ dnode_rele(dn, FTAG);
+
+ return (err);
+}
+
static int
dmu_write_uio_dnode(dnode_t *dn, uio_t *uio, uint64_t size, dmu_tx_t *tx)
{
return (err);
for (i = 0; i < numbufs; i++) {
- int tocpy;
- int bufoff;
+ uint64_t tocpy;
+ int64_t bufoff;
dmu_buf_t *db = dbp[i];
ASSERT(size > 0);
bufoff = uio->uio_loffset - db->db_offset;
- tocpy = (int)MIN(db->db_size - bufoff, size);
+ tocpy = MIN(db->db_size - bufoff, size);
ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size);
return (err);
}
+/*
+ * Write 'size' bytes from the uio buffer.
+ * To object zdb->db_object.
+ * Starting at offset uio->uio_loffset.
+ *
+ * If the caller already has a dbuf in the target object
+ * (e.g. its bonus buffer), this routine is faster than dmu_write_uio(),
+ * because we don't have to find the dnode_t for the object.
+ */
int
dmu_write_uio_dbuf(dmu_buf_t *zdb, uio_t *uio, uint64_t size,
dmu_tx_t *tx)
return (err);
}
+/*
+ * Write 'size' bytes from the uio buffer.
+ * To the specified object.
+ * Starting at offset uio->uio_loffset.
+ */
int
dmu_write_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size,
dmu_tx_t *tx)
dmu_request_arcbuf(dmu_buf_t *handle, int size)
{
dmu_buf_impl_t *db = (dmu_buf_impl_t *)handle;
- spa_t *spa;
- DB_GET_SPA(&spa, db);
- return (arc_loan_buf(spa, size));
+ return (arc_loan_buf(db->db_objset->os_spa, size));
}
/*
dmu_return_arcbuf(arc_buf_t *buf)
{
arc_return_buf(buf, FTAG);
- VERIFY(arc_buf_remove_ref(buf, FTAG) == 1);
+ VERIFY(arc_buf_remove_ref(buf, FTAG));
}
/*
rw_exit(&dn->dn_struct_rwlock);
DB_DNODE_EXIT(dbuf);
- if (offset == db->db.db_offset && blksz == db->db.db_size) {
+ /*
+ * We can only assign if the offset is aligned, the arc buf is the
+ * same size as the dbuf, and the dbuf is not metadata. It
+ * can't be metadata because the loaned arc buf comes from the
+ * user-data kmem area.
+ */
+ if (offset == db->db.db_offset && blksz == db->db.db_size &&
+ DBUF_GET_BUFC_TYPE(db) == ARC_BUFC_DATA) {
dbuf_assign_arcbuf(db, buf, tx);
dbuf_rele(db, FTAG);
} else {
* block size still needs to be known for replay.
*/
BP_SET_LSIZE(bp, db->db_size);
- } else {
+ } else if (!BP_IS_EMBEDDED(bp)) {
ASSERT(BP_GET_LEVEL(bp) == 0);
bp->blk_fill = 1;
}
mutex_enter(&db->db_mtx);
ASSERT(dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC);
if (zio->io_error == 0) {
+ dr->dt.dl.dr_nopwrite = !!(zio->io_flags & ZIO_FLAG_NOPWRITE);
+ if (dr->dt.dl.dr_nopwrite) {
+ ASSERTV(blkptr_t *bp = zio->io_bp);
+ ASSERTV(blkptr_t *bp_orig = &zio->io_bp_orig);
+ ASSERTV(uint8_t chksum = BP_GET_CHECKSUM(bp_orig));
+
+ ASSERT(BP_EQUAL(bp, bp_orig));
+ ASSERT(zio->io_prop.zp_compress != ZIO_COMPRESS_OFF);
+ ASSERT(zio_checksum_table[chksum].ci_dedup);
+ }
dr->dt.dl.dr_overridden_by = *zio->io_bp;
dr->dt.dl.dr_override_state = DR_OVERRIDDEN;
dr->dt.dl.dr_copies = zio->io_prop.zp_copies;
- if (BP_IS_HOLE(&dr->dt.dl.dr_overridden_by))
+
+ /*
+ * Old style holes are filled with all zeros, whereas
+ * new-style holes maintain their lsize, type, level,
+ * and birth time (see zio_write_compress). While we
+ * need to reset the BP_SET_LSIZE() call that happened
+ * in dmu_sync_ready for old style holes, we do *not*
+ * want to wipe out the information contained in new
+ * style holes. Thus, only zero out the block pointer if
+ * it's an old style hole.
+ */
+ if (BP_IS_HOLE(&dr->dt.dl.dr_overridden_by) &&
+ dr->dt.dl.dr_overridden_by.blk_birth == 0)
BP_ZERO(&dr->dt.dl.dr_overridden_by);
} else {
dr->dt.dl.dr_override_state = DR_NOT_OVERRIDDEN;
{
blkptr_t *bp = zio->io_bp;
dmu_sync_arg_t *dsa = zio->io_private;
+ ASSERTV(blkptr_t *bp_orig = &zio->io_bp_orig);
if (zio->io_error == 0 && !BP_IS_HOLE(bp)) {
- ASSERT(zio->io_bp->blk_birth == zio->io_txg);
- ASSERT(zio->io_txg > spa_syncing_txg(zio->io_spa));
- zio_free(zio->io_spa, zio->io_txg, zio->io_bp);
+ /*
+ * If we didn't allocate a new block (i.e. ZIO_FLAG_NOPWRITE)
+ * then there is nothing to do here. Otherwise, free the
+ * newly allocated block in this txg.
+ */
+ if (zio->io_flags & ZIO_FLAG_NOPWRITE) {
+ ASSERT(BP_EQUAL(bp, bp_orig));
+ } else {
+ ASSERT(BP_IS_HOLE(bp_orig) || !BP_EQUAL(bp, bp_orig));
+ ASSERT(zio->io_bp->blk_birth == zio->io_txg);
+ ASSERT(zio->io_txg > spa_syncing_txg(zio->io_spa));
+ zio_free(zio->io_spa, zio->io_txg, zio->io_bp);
+ }
}
dmu_tx_commit(dsa->dsa_tx);
static int
dmu_sync_late_arrival(zio_t *pio, objset_t *os, dmu_sync_cb_t *done, zgd_t *zgd,
- zio_prop_t *zp, zbookmark_t *zb)
+ zio_prop_t *zp, zbookmark_phys_t *zb)
{
dmu_sync_arg_t *dsa;
dmu_tx_t *tx;
dmu_tx_hold_space(tx, zgd->zgd_db->db_size);
if (dmu_tx_assign(tx, TXG_WAIT) != 0) {
dmu_tx_abort(tx);
- return (EIO); /* Make zl_get_data do txg_waited_synced() */
+ /* Make zl_get_data do txg_waited_synced() */
+ return (SET_ERROR(EIO));
}
- dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_PUSHPAGE);
+ dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP);
dsa->dsa_dr = NULL;
dsa->dsa_done = done;
dsa->dsa_zgd = zgd;
zio_nowait(zio_write(pio, os->os_spa, dmu_tx_get_txg(tx), zgd->zgd_bp,
zgd->zgd_db->db_data, zgd->zgd_db->db_size, zp,
- dmu_sync_late_arrival_ready, dmu_sync_late_arrival_done, dsa,
- ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL | ZIO_FLAG_FASTWRITE, zb));
+ dmu_sync_late_arrival_ready, NULL, dmu_sync_late_arrival_done, dsa,
+ ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL|ZIO_FLAG_FASTWRITE, zb));
return (0);
}
*
* Return values:
*
- * EEXIST: this txg has already been synced, so there's nothing to to.
+ * EEXIST: this txg has already been synced, so there's nothing to do.
* The caller should not log the write.
*
* ENOENT: the block was dbuf_free_range()'d, so there's nothing to do.
dsl_dataset_t *ds = os->os_dsl_dataset;
dbuf_dirty_record_t *dr;
dmu_sync_arg_t *dsa;
- zbookmark_t zb;
+ zbookmark_phys_t zb;
zio_prop_t zp;
dnode_t *dn;
ASSERT(pio != NULL);
- ASSERT(BP_IS_HOLE(bp));
ASSERT(txg != 0);
SET_BOOKMARK(&zb, ds->ds_object,
* This txg has already synced. There's nothing to do.
*/
mutex_exit(&db->db_mtx);
- return (EEXIST);
+ return (SET_ERROR(EEXIST));
}
if (txg <= spa_syncing_txg(os->os_spa)) {
* There's no need to log writes to freed blocks, so we're done.
*/
mutex_exit(&db->db_mtx);
- return (ENOENT);
+ return (SET_ERROR(ENOENT));
}
+ ASSERT(dr->dr_next == NULL || dr->dr_next->dr_txg < txg);
+
+ /*
+ * Assume the on-disk data is X, the current syncing data (in
+ * txg - 1) is Y, and the current in-memory data is Z (currently
+ * in dmu_sync).
+ *
+ * We usually want to perform a nopwrite if X and Z are the
+ * same. However, if Y is different (i.e. the BP is going to
+ * change before this write takes effect), then a nopwrite will
+ * be incorrect - we would override with X, which could have
+ * been freed when Y was written.
+ *
+ * (Note that this is not a concern when we are nop-writing from
+ * syncing context, because X and Y must be identical, because
+ * all previous txgs have been synced.)
+ *
+ * Therefore, we disable nopwrite if the current BP could change
+ * before this TXG. There are two ways it could change: by
+ * being dirty (dr_next is non-NULL), or by being freed
+ * (dnode_block_freed()). This behavior is verified by
+ * zio_done(), which VERIFYs that the override BP is identical
+ * to the on-disk BP.
+ */
+ DB_DNODE_ENTER(db);
+ dn = DB_DNODE(db);
+ if (dr->dr_next != NULL || dnode_block_freed(dn, db->db_blkid))
+ zp.zp_nopwrite = B_FALSE;
+ DB_DNODE_EXIT(db);
+
ASSERT(dr->dr_txg == txg);
if (dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC ||
dr->dt.dl.dr_override_state == DR_OVERRIDDEN) {
* have been dirtied since, or we would have cleared the state.
*/
mutex_exit(&db->db_mtx);
- return (EALREADY);
+ return (SET_ERROR(EALREADY));
}
ASSERT(dr->dt.dl.dr_override_state == DR_NOT_OVERRIDDEN);
dr->dt.dl.dr_override_state = DR_IN_DMU_SYNC;
mutex_exit(&db->db_mtx);
- dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_PUSHPAGE);
+ dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP);
dsa->dsa_dr = dr;
dsa->dsa_done = done;
dsa->dsa_zgd = zgd;
zio_nowait(arc_write(pio, os->os_spa, txg,
bp, dr->dt.dl.dr_data, DBUF_IS_L2CACHEABLE(db),
- DBUF_IS_L2COMPRESSIBLE(db), &zp, dmu_sync_ready, dmu_sync_done,
- dsa, ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL | ZIO_FLAG_FASTWRITE, &zb));
+ DBUF_IS_L2COMPRESSIBLE(db), &zp, dmu_sync_ready,
+ NULL, dmu_sync_done, dsa, ZIO_PRIORITY_SYNC_WRITE,
+ ZIO_FLAG_CANFAIL, &zb));
return (0);
}
{
dnode_t *dn;
- /* XXX assumes dnode_hold will not get an i/o error */
- (void) dnode_hold(os, object, FTAG, &dn);
- ASSERT(checksum < ZIO_CHECKSUM_FUNCTIONS);
+ /*
+ * Send streams include each object's checksum function. This
+ * check ensures that the receiving system can understand the
+ * checksum function transmitted.
+ */
+ ASSERT3U(checksum, <, ZIO_CHECKSUM_LEGACY_FUNCTIONS);
+
+ VERIFY0(dnode_hold(os, object, FTAG, &dn));
+ ASSERT3U(checksum, <, ZIO_CHECKSUM_FUNCTIONS);
dn->dn_checksum = checksum;
dnode_setdirty(dn, tx);
dnode_rele(dn, FTAG);
{
dnode_t *dn;
- /* XXX assumes dnode_hold will not get an i/o error */
- (void) dnode_hold(os, object, FTAG, &dn);
- ASSERT(compress < ZIO_COMPRESS_FUNCTIONS);
+ /*
+ * Send streams include each object's compression function. This
+ * check ensures that the receiving system can understand the
+ * compression function transmitted.
+ */
+ ASSERT3U(compress, <, ZIO_COMPRESS_LEGACY_FUNCTIONS);
+
+ VERIFY0(dnode_hold(os, object, FTAG, &dn));
dn->dn_compress = compress;
dnode_setdirty(dn, tx);
dnode_rele(dn, FTAG);
int zfs_mdcomp_disable = 0;
+/*
+ * When the "redundant_metadata" property is set to "most", only indirect
+ * blocks of this level and higher will have an additional ditto block.
+ */
+int zfs_redundant_metadata_most_ditto_level = 2;
+
void
dmu_write_policy(objset_t *os, dnode_t *dn, int level, int wp, zio_prop_t *zp)
{
enum zio_checksum checksum = os->os_checksum;
enum zio_compress compress = os->os_compress;
enum zio_checksum dedup_checksum = os->os_dedup_checksum;
- boolean_t dedup;
+ boolean_t dedup = B_FALSE;
+ boolean_t nopwrite = B_FALSE;
boolean_t dedup_verify = os->os_dedup_verify;
int copies = os->os_copies;
/*
- * Determine checksum setting.
+ * We maintain different write policies for each of the following
+ * types of data:
+ * 1. metadata
+ * 2. preallocated blocks (i.e. level-0 blocks of a dump device)
+ * 3. all other level 0 blocks
*/
if (ismd) {
+ if (zfs_mdcomp_disable) {
+ compress = ZIO_COMPRESS_EMPTY;
+ } else {
+ /*
+ * XXX -- we should design a compression algorithm
+ * that specializes in arrays of bps.
+ */
+ compress = zio_compress_select(os->os_spa,
+ ZIO_COMPRESS_ON, ZIO_COMPRESS_ON);
+ }
+
/*
* Metadata always gets checksummed. If the data
* checksum is multi-bit correctable, and it's not a
if (zio_checksum_table[checksum].ci_correctable < 1 ||
zio_checksum_table[checksum].ci_eck)
checksum = ZIO_CHECKSUM_FLETCHER_4;
- } else {
- checksum = zio_checksum_select(dn->dn_checksum, checksum);
- }
- /*
- * Determine compression setting.
- */
- if (ismd) {
+ if (os->os_redundant_metadata == ZFS_REDUNDANT_METADATA_ALL ||
+ (os->os_redundant_metadata ==
+ ZFS_REDUNDANT_METADATA_MOST &&
+ (level >= zfs_redundant_metadata_most_ditto_level ||
+ DMU_OT_IS_METADATA(type) || (wp & WP_SPILL))))
+ copies++;
+ } else if (wp & WP_NOFILL) {
+ ASSERT(level == 0);
+
/*
- * XXX -- we should design a compression algorithm
- * that specializes in arrays of bps.
+ * If we're writing preallocated blocks, we aren't actually
+ * writing them so don't set any policy properties. These
+ * blocks are currently only used by an external subsystem
+ * outside of zfs (i.e. dump) and not written by the zio
+ * pipeline.
*/
- compress = zfs_mdcomp_disable ? ZIO_COMPRESS_EMPTY :
- ZIO_COMPRESS_LZJB;
+ compress = ZIO_COMPRESS_OFF;
+ checksum = ZIO_CHECKSUM_OFF;
} else {
- compress = zio_compress_select(dn->dn_compress, compress);
- }
+ compress = zio_compress_select(os->os_spa, dn->dn_compress,
+ compress);
- /*
- * Determine dedup setting. If we are in dmu_sync(), we won't
- * actually dedup now because that's all done in syncing context;
- * but we do want to use the dedup checkum. If the checksum is not
- * strong enough to ensure unique signatures, force dedup_verify.
- */
- dedup = (!ismd && dedup_checksum != ZIO_CHECKSUM_OFF);
- if (dedup) {
- checksum = dedup_checksum;
- if (!zio_checksum_table[checksum].ci_dedup)
- dedup_verify = 1;
- }
+ checksum = (dedup_checksum == ZIO_CHECKSUM_OFF) ?
+ zio_checksum_select(dn->dn_checksum, checksum) :
+ dedup_checksum;
- if (wp & WP_DMU_SYNC)
- dedup = 0;
+ /*
+ * Determine dedup setting. If we are in dmu_sync(),
+ * we won't actually dedup now because that's all
+ * done in syncing context; but we do want to use the
+ * dedup checkum. If the checksum is not strong
+ * enough to ensure unique signatures, force
+ * dedup_verify.
+ */
+ if (dedup_checksum != ZIO_CHECKSUM_OFF) {
+ dedup = (wp & WP_DMU_SYNC) ? B_FALSE : B_TRUE;
+ if (!zio_checksum_table[checksum].ci_dedup)
+ dedup_verify = B_TRUE;
+ }
- if (wp & WP_NOFILL) {
- ASSERT(!ismd && level == 0);
- checksum = ZIO_CHECKSUM_OFF;
- compress = ZIO_COMPRESS_OFF;
- dedup = B_FALSE;
+ /*
+ * Enable nopwrite if we have a cryptographically secure
+ * checksum that has no known collisions (i.e. SHA-256)
+ * and compression is enabled. We don't enable nopwrite if
+ * dedup is enabled as the two features are mutually exclusive.
+ */
+ nopwrite = (!dedup && zio_checksum_table[checksum].ci_dedup &&
+ compress != ZIO_COMPRESS_OFF && zfs_nopwrite_enabled);
}
zp->zp_checksum = checksum;
zp->zp_compress = compress;
zp->zp_type = (wp & WP_SPILL) ? dn->dn_bonustype : type;
zp->zp_level = level;
- zp->zp_copies = MIN(copies + ismd, spa_max_replication(os->os_spa));
+ zp->zp_copies = MIN(copies, spa_max_replication(os->os_spa));
zp->zp_dedup = dedup;
zp->zp_dedup_verify = dedup && dedup_verify;
+ zp->zp_nopwrite = nopwrite;
}
int
}
void
-dmu_object_info_from_dnode(dnode_t *dn, dmu_object_info_t *doi)
+__dmu_object_info_from_dnode(dnode_t *dn, dmu_object_info_t *doi)
{
- dnode_phys_t *dnp;
+ dnode_phys_t *dnp = dn->dn_phys;
int i;
- rw_enter(&dn->dn_struct_rwlock, RW_READER);
- mutex_enter(&dn->dn_mtx);
-
- dnp = dn->dn_phys;
-
doi->doi_data_block_size = dn->dn_datablksz;
doi->doi_metadata_block_size = dn->dn_indblkshift ?
1ULL << dn->dn_indblkshift : 0;
doi->doi_indirection = dn->dn_nlevels;
doi->doi_checksum = dn->dn_checksum;
doi->doi_compress = dn->dn_compress;
+ doi->doi_nblkptr = dn->dn_nblkptr;
doi->doi_physical_blocks_512 = (DN_USED_BYTES(dnp) + 256) >> 9;
- doi->doi_max_offset = (dnp->dn_maxblkid + 1) * dn->dn_datablksz;
+ doi->doi_max_offset = (dn->dn_maxblkid + 1) * dn->dn_datablksz;
doi->doi_fill_count = 0;
for (i = 0; i < dnp->dn_nblkptr; i++)
- doi->doi_fill_count += dnp->dn_blkptr[i].blk_fill;
+ doi->doi_fill_count += BP_GET_FILL(&dnp->dn_blkptr[i]);
+}
+
+void
+dmu_object_info_from_dnode(dnode_t *dn, dmu_object_info_t *doi)
+{
+ rw_enter(&dn->dn_struct_rwlock, RW_READER);
+ mutex_enter(&dn->dn_mtx);
+
+ __dmu_object_info_from_dnode(dn, doi);
mutex_exit(&dn->dn_mtx);
rw_exit(&dn->dn_struct_rwlock);
void
dmu_fini(void)
{
- arc_fini();
+ arc_fini(); /* arc depends on l2arc, so arc must go first */
l2arc_fini();
dmu_tx_fini();
zfetch_fini();
EXPORT_SYMBOL(dmu_prefetch);
EXPORT_SYMBOL(dmu_free_range);
EXPORT_SYMBOL(dmu_free_long_range);
-EXPORT_SYMBOL(dmu_free_object);
+EXPORT_SYMBOL(dmu_free_long_object);
EXPORT_SYMBOL(dmu_read);
EXPORT_SYMBOL(dmu_write);
EXPORT_SYMBOL(dmu_prealloc);
module_param(zfs_mdcomp_disable, int, 0644);
MODULE_PARM_DESC(zfs_mdcomp_disable, "Disable meta data compression");
+
+module_param(zfs_nopwrite_enabled, int, 0644);
+MODULE_PARM_DESC(zfs_nopwrite_enabled, "Enable NOP writes");
+
#endif
projects / mirror_zfs-debian.git / blobdiff