diff options
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_objset.c')
| -rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_objset.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_objset.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_objset.c index 82c5854..fe0c0db 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_objset.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_objset.c @@ -621,7 +621,7 @@ dmu_objset_refresh_ownership(objset_t *os, void *tag) { dsl_pool_t *dp; dsl_dataset_t *ds, *newds; - char name[MAXNAMELEN]; + char name[ZFS_MAX_DATASET_NAME_LEN]; ds = os->os_dsl_dataset; VERIFY3P(ds, !=, NULL); @@ -791,11 +791,17 @@ dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, /* * Determine the number of levels necessary for the meta-dnode - * to contain DN_MAX_OBJECT dnodes. + * to contain DN_MAX_OBJECT dnodes. Note that in order to + * ensure that we do not overflow 64 bits, there has to be + * a nlevels that gives us a number of blocks > DN_MAX_OBJECT + * but < 2^64. Therefore, + * (mdn->dn_indblkshift - SPA_BLKPTRSHIFT) (10) must be + * less than (64 - log2(DN_MAX_OBJECT)) (16). */ - while ((uint64_t)mdn->dn_nblkptr << (mdn->dn_datablkshift + + while ((uint64_t)mdn->dn_nblkptr << + (mdn->dn_datablkshift - DNODE_SHIFT + (levels - 1) * (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) < - DN_MAX_OBJECT * sizeof (dnode_phys_t)) + DN_MAX_OBJECT) levels++; mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] = @@ -839,6 +845,9 @@ dmu_objset_create_check(void *arg, dmu_tx_t *tx) if (strchr(doca->doca_name, '@') != NULL) return (SET_ERROR(EINVAL)); + if (strlen(doca->doca_name) >= ZFS_MAX_DATASET_NAME_LEN) + return (SET_ERROR(ENAMETOOLONG)); + error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail); if (error != 0) return (error); @@ -923,6 +932,9 @@ dmu_objset_clone_check(void *arg, dmu_tx_t *tx) if (strchr(doca->doca_clone, '@') != NULL) return (SET_ERROR(EINVAL)); + if (strlen(doca->doca_clone) >= ZFS_MAX_DATASET_NAME_LEN) + return (SET_ERROR(ENAMETOOLONG)); + error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail); if (error != 0) return (error); @@ -962,7 +974,7 @@ dmu_objset_clone_sync(void *arg, dmu_tx_t *tx) const char *tail; dsl_dataset_t *origin, *ds; uint64_t obj; - char namebuf[MAXNAMELEN]; + char namebuf[ZFS_MAX_DATASET_NAME_LEN]; VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail)); VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin)); @@ -1973,7 +1985,7 @@ dmu_objset_get_user(objset_t *os) /* * Determine name of filesystem, given name of snapshot. - * buf must be at least MAXNAMELEN bytes + * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes */ int dmu_fsname(const char *snapname, char *buf) @@ -1981,7 +1993,7 @@ dmu_fsname(const char *snapname, char *buf) char *atp = strchr(snapname, '@'); if (atp == NULL) return (SET_ERROR(EINVAL)); - if (atp - snapname >= MAXNAMELEN) + if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN) return (SET_ERROR(ENAMETOOLONG)); (void) strlcpy(buf, snapname, atp - snapname + 1); return (0); |
