* Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, 2014, Intel Corporation.
+ * Copyright (c) 2012, 2015, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
return 0;
}
-/* Return number of blocks that aren't mapped in the [start, start + size]
- * region */
-static int osd_count_not_mapped(struct osd_object *obj, uint64_t start,
- uint32_t size)
+static inline uint32_t osd_get_blocksz(struct osd_object *obj)
{
- dmu_buf_impl_t *dbi = (dmu_buf_impl_t *)obj->oo_db;
- dmu_buf_impl_t *db;
- dnode_t *dn;
- uint32_t blkshift;
- uint64_t end, blkid;
- int rc;
- ENTRY;
+ uint32_t blksz;
+ u_longlong_t unused;
- DB_DNODE_ENTER(dbi);
- dn = DB_DNODE(dbi);
-
- if (dn->dn_maxblkid == 0) {
- if (start + size <= dn->dn_datablksz)
- GOTO(out, size = 0);
- if (start < dn->dn_datablksz)
- start = dn->dn_datablksz;
- /* assume largest block size */
- blkshift = osd_spa_maxblockshift(
- dmu_objset_spa(osd_obj2dev(obj)->od_os));
- } else {
- /* blocksize can't change */
- blkshift = dn->dn_datablkshift;
- }
-
- /* compute address of last block */
- end = (start + size - 1) >> blkshift;
- /* align start on block boundaries */
- start >>= blkshift;
+ LASSERT(obj->oo_db);
- /* size is null, can't be mapped */
- if (obj->oo_attr.la_size == 0 || dn->dn_maxblkid == 0)
- GOTO(out, size = (end - start + 1) << blkshift);
+ dmu_object_size_from_db(obj->oo_db, &blksz, &unused);
+ return blksz;
+}
- /* beyond EOF, can't be mapped */
- if (start > dn->dn_maxblkid)
- GOTO(out, size = (end - start + 1) << blkshift);
+static inline uint64_t osd_roundup2blocksz(uint64_t size,
+ uint64_t offset,
+ uint32_t blksz)
+{
+ LASSERT(blksz > 0);
- size = 0;
- for (blkid = start; blkid <= end; blkid++) {
- if (blkid == dn->dn_maxblkid)
- /* this one is mapped for sure */
- continue;
- if (blkid > dn->dn_maxblkid) {
- size += (end - blkid + 1) << blkshift;
- GOTO(out, size);
- }
+ size += offset % blksz;
- rc = dbuf_hold_impl(dn, 0, blkid, TRUE, FTAG, &db);
- if (rc) {
- /* for ENOENT (block not mapped) and any other errors,
- * assume the block isn't mapped */
- size += 1 << blkshift;
- continue;
- }
- dbuf_rele(db, FTAG);
- }
+ if (likely(IS_PO2(blksz)))
+ return PO2_ROUNDUP_TYPED(size, blksz, uint64_t);
- GOTO(out, size);
-out:
- DB_DNODE_EXIT(dbi);
- return size;
+ size += blksz - 1;
+ do_div(size, blksz);
+ return size * blksz;
}
static int osd_declare_write_commit(const struct lu_env *env,
- struct dt_object *dt,
- struct niobuf_local *lnb, int npages,
- struct thandle *th)
+ struct dt_object *dt,
+ struct niobuf_local *lnb, int npages,
+ struct thandle *th)
{
struct osd_object *obj = osd_dt_obj(dt);
struct osd_device *osd = osd_obj2dev(obj);
struct osd_thandle *oh;
uint64_t offset = 0;
uint32_t size = 0;
+ uint32_t blksz = osd_get_blocksz(obj);
int i, rc, flags = 0;
bool ignore_quota = false, synced = false;
long long space = 0;
dmu_tx_hold_write(oh->ot_tx, obj->oo_db->db_object,
offset, size);
- /* estimating space that will be consumed by a write is rather
+ /* Estimating space to be consumed by a write is rather
* complicated with ZFS. As a consequence, we don't account for
- * indirect blocks and quota overrun will be adjusted once the
- * operation is committed, if required. */
- space += osd_count_not_mapped(obj, offset, size);
+ * indirect blocks and just use as a rough estimate the worse
+ * case where the old space is being held by a snapshot. Quota
+ * overrun will be adjusted once the operation is committed, if
+ * required. */
+ space += osd_roundup2blocksz(size, offset, blksz);
offset = lnb[i].lnb_file_offset;
size = lnb[i].lnb_len;
if (size) {
dmu_tx_hold_write(oh->ot_tx, obj->oo_db->db_object,
offset, size);
- space += osd_count_not_mapped(obj, offset, size);
+ space += osd_roundup2blocksz(size, offset, blksz);
}
dmu_tx_hold_sa(oh->ot_tx, obj->oo_sa_hdl, 0);
* copies */
space *= osd->od_os->os_copies;
space = toqb(space);
- CDEBUG(D_QUOTA, "writting %d pages, reserving "LPD64"K of quota "
- "space\n", npages, space);
+ CDEBUG(D_QUOTA, "writing %d pages, reserving "LPD64"K of quota space\n",
+ npages, space);
record_start_io(osd, WRITE, discont_pages);
retry:
RETURN(rc);
}
-/**
- * Policy to grow ZFS block size by write pattern.
- * For sequential write, it grows block size gradually until it reaches the
- * maximum blocksize the dataset can support. Otherwise, it will just use
- * the maximum block size.
- */
-static int osd_grow_blocksize(struct osd_object *obj, struct osd_thandle *oh,
- uint64_t start, uint64_t end)
-{
- struct osd_device *osd = osd_obj2dev(obj);
- dmu_buf_impl_t *db = (dmu_buf_impl_t *)obj->oo_db;
- dnode_t *dn;
- uint32_t blksz;
- int rc = 0;
- ENTRY;
-
- DB_DNODE_ENTER(db);
- dn = DB_DNODE(db);
-
- if (dn->dn_maxblkid > 0) /* can't change block size */
- GOTO(out, rc);
-
- blksz = dn->dn_datablksz;
- if (blksz >= osd->od_max_blksz)
- GOTO(out, rc);
-
- /* now ZFS can support up to 16MB block size, and if the write
- * is sequential, it just increases the block size gradually */
- if (start <= blksz) { /* sequential */
- blksz = (uint32_t)min_t(uint64_t, osd->od_max_blksz, end);
- if (!is_power_of_2(blksz))
- blksz = size_roundup_power2(blksz);
- } else { /* otherwise, use maximum block size */
- blksz = osd->od_max_blksz;
- }
-
- if (blksz > dn->dn_datablksz)
- rc = -dmu_object_set_blocksize(osd->od_os, dn->dn_object,
- blksz, 0, oh->ot_tx);
- EXIT;
-out:
- DB_DNODE_EXIT(db);
- return rc;
-}
-
static int osd_write_commit(const struct lu_env *env, struct dt_object *dt,
struct niobuf_local *lnb, int npages,
struct thandle *th)
LASSERT(th != NULL);
oh = container_of0(th, struct osd_thandle, ot_super);
- /* adjust block size. Assume the buffers are sorted. */
- rc = osd_grow_blocksize(obj, oh, lnb[0].lnb_file_offset,
- lnb[npages - 1].lnb_file_offset +
- lnb[npages - 1].lnb_len);
- if (rc < 0) /* ignore the error */
- CDEBUG(D_INODE, "obj "DFID": change block size error rc=%d\n",
- PFID(lu_object_fid(&dt->do_lu)), rc);
-
for (i = 0; i < npages; i++) {
CDEBUG(D_INODE, "write %u bytes at %u\n",
(unsigned) lnb[i].lnb_len,
false));
}
+static int osd_ladvise(const struct lu_env *env, struct dt_object *dt,
+ __u64 start, __u64 end, enum lu_ladvise_type advice)
+{
+ int rc;
+ ENTRY;
+
+ switch (advice) {
+ default:
+ rc = -ENOTSUPP;
+ break;
+ }
+
+ RETURN(rc);
+}
struct dt_body_operations osd_body_ops = {
.dbo_read = osd_read,
.dbo_read_prep = osd_read_prep,
.dbo_declare_punch = osd_declare_punch,
.dbo_punch = osd_punch,
+ .dbo_ladvise = osd_ladvise,
};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff