diff options
Diffstat (limited to 'sys/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c')
| -rw-r--r-- | sys/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/sys/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c b/sys/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c index a9707a0..af06c31 100644 --- a/sys/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c +++ b/sys/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c @@ -491,6 +491,32 @@ dsl_dataset_name(dsl_dataset_t *ds, char *name) } } +static int +dsl_dataset_namelen(dsl_dataset_t *ds) +{ + int result; + + if (ds == NULL) { + result = 3; /* "mos" */ + } else { + result = dsl_dir_namelen(ds->ds_dir); + VERIFY(0 == dsl_dataset_get_snapname(ds)); + if (ds->ds_snapname[0]) { + ++result; /* adding one for the @-sign */ + if (!MUTEX_HELD(&ds->ds_lock)) { + /* see dsl_datset_name */ + mutex_enter(&ds->ds_lock); + result += strlen(ds->ds_snapname); + mutex_exit(&ds->ds_lock); + } else { + result += strlen(ds->ds_snapname); + } + } + } + + return (result); +} + void dsl_dataset_close(dsl_dataset_t *ds, int mode, void *tag) { @@ -1328,6 +1354,13 @@ dsl_dataset_snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx) if (err != ENOENT) return (err); + /* + * Check that the dataset's name is not too long. Name consists + * of the dataset's length + 1 for the @-sign + snapshot name's length + */ + if (dsl_dataset_namelen(ds) + 1 + strlen(snapname) >= MAXNAMELEN) + return (ENAMETOOLONG); + ds->ds_trysnap_txg = tx->tx_txg; return (0); } |
