diff options
Diffstat (limited to 'usr/src/lib/libzfs/common/libzfs_dataset.c')
| -rw-r--r-- | usr/src/lib/libzfs/common/libzfs_dataset.c | 90 |
1 files changed, 84 insertions, 6 deletions
diff --git a/usr/src/lib/libzfs/common/libzfs_dataset.c b/usr/src/lib/libzfs/common/libzfs_dataset.c index d5af0574b8..32195d58e6 100644 --- a/usr/src/lib/libzfs/common/libzfs_dataset.c +++ b/usr/src/lib/libzfs/common/libzfs_dataset.c @@ -21,7 +21,7 @@ /* * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. - * Copyright (c) 2018, Joyent, Inc. All rights reserved. + * Copyright 2019 Joyent, Inc. * Copyright (c) 2011, 2016 by Delphix. All rights reserved. * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved. * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved. @@ -1518,6 +1518,7 @@ zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl) uint64_t new_reservation; zfs_prop_t resv_prop; nvlist_t *props; + zpool_handle_t *zph = zpool_handle(zhp); /* * If this is an existing volume, and someone is setting the volsize, @@ -1532,7 +1533,7 @@ zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl) fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE)); - if ((zvol_volsize_to_reservation(old_volsize, props) != + if ((zvol_volsize_to_reservation(zph, old_volsize, props) != old_reservation) || nvlist_exists(nvl, zfs_prop_to_name(resv_prop))) { fnvlist_free(props); @@ -1543,7 +1544,7 @@ zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl) fnvlist_free(props); return (-1); } - new_reservation = zvol_volsize_to_reservation(new_volsize, props); + new_reservation = zvol_volsize_to_reservation(zph, new_volsize, props); fnvlist_free(props); if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop), @@ -1598,7 +1599,8 @@ zfs_fix_auto_resv(zfs_handle_t *zhp, nvlist_t *nvl) volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); } - resvsize = zvol_volsize_to_reservation(volsize, props); + resvsize = zvol_volsize_to_reservation(zpool_handle(zhp), volsize, + props); fnvlist_free(props); (void) nvlist_remove_all(nvl, zfs_prop_to_name(prop)); @@ -5131,12 +5133,85 @@ zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) } /* + * Derived from function of same name in uts/common/fs/zfs/vdev_raidz.c + */ +static uint64_t +vdev_raidz_asize(uint64_t ndisks, uint64_t nparity, uint64_t ashift, + uint64_t blksize) +{ + uint64_t asize, ndata; + + ASSERT3U(ndisks, >, nparity); + ndata = ndisks - nparity; + asize = ((blksize - 1) >> ashift) + 1; + asize += nparity * ((asize + ndata - 1) / ndata); + asize = roundup(asize, nparity + 1) << ashift; + + return (asize); +} + +/* + * Determine how much space will be allocated if it lands on the most space- + * inefficient top-level vdev. Returns the size in bytes required to store one + * copy of the volume data. + */ +static uint64_t +volsize_from_vdevs(zpool_handle_t *zhp, uint64_t nblocks, uint64_t blksize) +{ + nvlist_t *config, *tree, **vdevs; + uint_t nvdevs, v; + uint64_t ret = 0; + + config = zpool_get_config(zhp, NULL); + if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &tree) != 0 || + nvlist_lookup_nvlist_array(tree, ZPOOL_CONFIG_CHILDREN, + &vdevs, &nvdevs) != 0) { + return (nblocks * blksize); + } + + for (v = 0; v < nvdevs; v++) { + char *type; + uint64_t nparity, ashift, asize, tsize; + nvlist_t **disks; + uint_t ndisks; + uint64_t volsize; + + if (nvlist_lookup_string(vdevs[v], ZPOOL_CONFIG_TYPE, + &type) != 0 || strcmp(type, VDEV_TYPE_RAIDZ) != 0 || + nvlist_lookup_uint64(vdevs[v], ZPOOL_CONFIG_NPARITY, + &nparity) != 0 || + nvlist_lookup_uint64(vdevs[v], ZPOOL_CONFIG_ASHIFT, + &ashift) != 0 || + nvlist_lookup_nvlist_array(vdevs[v], ZPOOL_CONFIG_CHILDREN, + &disks, &ndisks) != 0) { + continue; + } + + tsize = vdev_raidz_asize(ndisks, nparity, ashift, + SPA_OLD_MAXBLOCKSIZE); + asize = vdev_raidz_asize(ndisks, nparity, ashift, blksize); + + volsize = nblocks * asize * SPA_OLD_MAXBLOCKSIZE / tsize; + if (volsize > ret) { + ret = volsize; + } + } + + if (ret == 0) { + ret = nblocks * blksize; + } + + return (ret); +} + +/* * Convert the zvol's volume size to an appropriate reservation. * Note: If this routine is updated, it is necessary to update the ZFS test * suite's shell version in reservation.kshlib. */ uint64_t -zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) +zvol_volsize_to_reservation(zpool_handle_t *zph, uint64_t volsize, + nvlist_t *props) { uint64_t numdb; uint64_t nblocks, volblocksize; @@ -5152,7 +5227,10 @@ zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), &volblocksize) != 0) volblocksize = ZVOL_DEFAULT_BLOCKSIZE; - nblocks = volsize/volblocksize; + + nblocks = volsize / volblocksize; + volsize = volsize_from_vdevs(zph, nblocks, volblocksize); + /* start with metadnode L0-L6 */ numdb = 7; /* calculate number of indirects */ |