*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
+ * Copyright (c) 2012, 2015 by Delphix. All rights reserved.
*/
/* Portions Copyright 2010 Robert Milkowski */
return (zfs_fuid_overquota(zfsvfs, isgroup, fuid));
}
-int
-zfsvfs_create(const char *osname, zfsvfs_t **zfvp)
+/*
+ * Associate this zfsvfs with the given objset, which must be owned.
+ * This will cache a bunch of on-disk state from the objset in the
+ * zfsvfs.
+ */
+static int
+zfsvfs_init(zfsvfs_t *zfsvfs, objset_t *os)
{
- objset_t *os;
- zfsvfs_t *zfsvfs;
- uint64_t zval;
- int i, size, error;
- uint64_t sa_obj;
-
- zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP);
-
- /*
- * We claim to always be readonly so we can open snapshots;
- * other ZPL code will prevent us from writing to snapshots.
- */
- error = dmu_objset_own(osname, DMU_OST_ZFS, B_TRUE, zfsvfs, &os);
- if (error) {
- kmem_free(zfsvfs, sizeof (zfsvfs_t));
- return (error);
- }
+ int error;
+ uint64_t val;
- /*
- * Initialize the zfs-specific filesystem structure.
- * Should probably make this a kmem cache, shuffle fields.
- */
- zfsvfs->z_vfs = NULL;
- zfsvfs->z_sb = NULL;
- zfsvfs->z_parent = zfsvfs;
zfsvfs->z_max_blksz = SPA_OLD_MAXBLOCKSIZE;
zfsvfs->z_show_ctldir = ZFS_SNAPDIR_VISIBLE;
zfsvfs->z_os = os;
error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zfsvfs->z_version);
- if (error) {
- goto out;
- } else if (zfsvfs->z_version > ZPL_VERSION) {
- error = SET_ERROR(ENOTSUP);
- goto out;
+ if (error != 0)
+ return (error);
+ if (zfsvfs->z_version >
+ zfs_zpl_version_map(spa_version(dmu_objset_spa(os)))) {
+ (void) printk("Can't mount a version %lld file system "
+ "on a version %lld pool\n. Pool must be upgraded to mount "
+ "this file system.", (u_longlong_t)zfsvfs->z_version,
+ (u_longlong_t)spa_version(dmu_objset_spa(os)));
+ return (SET_ERROR(ENOTSUP));
}
- if ((error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &zval)) != 0)
- goto out;
- zfsvfs->z_norm = (int)zval;
+ error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &val);
+ if (error != 0)
+ return (error);
+ zfsvfs->z_norm = (int)val;
- if ((error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &zval)) != 0)
- goto out;
- zfsvfs->z_utf8 = (zval != 0);
+ error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &val);
+ if (error != 0)
+ return (error);
+ zfsvfs->z_utf8 = (val != 0);
- if ((error = zfs_get_zplprop(os, ZFS_PROP_CASE, &zval)) != 0)
- goto out;
- zfsvfs->z_case = (uint_t)zval;
+ error = zfs_get_zplprop(os, ZFS_PROP_CASE, &val);
+ if (error != 0)
+ return (error);
+ zfsvfs->z_case = (uint_t)val;
- if ((error = zfs_get_zplprop(os, ZFS_PROP_ACLTYPE, &zval)) != 0)
- goto out;
- zfsvfs->z_acl_type = (uint_t)zval;
+ if ((error = zfs_get_zplprop(os, ZFS_PROP_ACLTYPE, &val)) != 0)
+ return (error);
+ zfsvfs->z_acl_type = (uint_t)val;
/*
* Fold case on file systems that are always or sometimes case
zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os);
zfsvfs->z_use_sa = USE_SA(zfsvfs->z_version, zfsvfs->z_os);
+ uint64_t sa_obj = 0;
if (zfsvfs->z_use_sa) {
/* should either have both of these objects or none */
error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1,
&sa_obj);
- if (error)
- goto out;
+ if (error != 0)
+ return (error);
- error = zfs_get_zplprop(os, ZFS_PROP_XATTR, &zval);
- if ((error == 0) && (zval == ZFS_XATTR_SA))
+ error = zfs_get_zplprop(os, ZFS_PROP_XATTR, &val);
+ if ((error == 0) && (val == ZFS_XATTR_SA))
zfsvfs->z_xattr_sa = B_TRUE;
- } else {
- /*
- * Pre SA versions file systems should never touch
- * either the attribute registration or layout objects.
- */
- sa_obj = 0;
}
error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END,
&zfsvfs->z_attr_table);
- if (error)
- goto out;
+ if (error != 0)
+ return (error);
if (zfsvfs->z_version >= ZPL_VERSION_SA)
sa_register_update_callback(os, zfs_sa_upgrade);
error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1,
&zfsvfs->z_root);
- if (error)
- goto out;
+ if (error != 0)
+ return (error);
ASSERT(zfsvfs->z_root != 0);
error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1,
&zfsvfs->z_unlinkedobj);
- if (error)
- goto out;
+ if (error != 0)
+ return (error);
error = zap_lookup(os, MASTER_NODE_OBJ,
zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA],
8, 1, &zfsvfs->z_userquota_obj);
- if (error && error != ENOENT)
- goto out;
+ if (error == ENOENT)
+ zfsvfs->z_userquota_obj = 0;
+ else if (error != 0)
+ return (error);
error = zap_lookup(os, MASTER_NODE_OBJ,
zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA],
8, 1, &zfsvfs->z_groupquota_obj);
- if (error && error != ENOENT)
- goto out;
+ if (error == ENOENT)
+ zfsvfs->z_groupquota_obj = 0;
+ else if (error != 0)
+ return (error);
error = zap_lookup(os, MASTER_NODE_OBJ,
zfs_userquota_prop_prefixes[ZFS_PROP_USEROBJQUOTA],
8, 1, &zfsvfs->z_userobjquota_obj);
- if (error && error != ENOENT)
- goto out;
+ if (error == ENOENT)
+ zfsvfs->z_userobjquota_obj = 0;
+ else if (error != 0)
+ return (error);
error = zap_lookup(os, MASTER_NODE_OBJ,
zfs_userquota_prop_prefixes[ZFS_PROP_GROUPOBJQUOTA],
8, 1, &zfsvfs->z_groupobjquota_obj);
- if (error && error != ENOENT)
- goto out;
+ if (error == ENOENT)
+ zfsvfs->z_groupobjquota_obj = 0;
+ else if (error != 0)
+ return (error);
error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1,
&zfsvfs->z_fuid_obj);
- if (error && error != ENOENT)
- goto out;
+ if (error == ENOENT)
+ zfsvfs->z_fuid_obj = 0;
+ else if (error != 0)
+ return (error);
error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SHARES_DIR, 8, 1,
&zfsvfs->z_shares_dir);
- if (error && error != ENOENT)
- goto out;
+ if (error == ENOENT)
+ zfsvfs->z_shares_dir = 0;
+ else if (error != 0)
+ return (error);
+
+ return (0);
+}
+
+int
+zfsvfs_create(const char *osname, zfsvfs_t **zfvp)
+{
+ objset_t *os;
+ zfsvfs_t *zfsvfs;
+ int error;
+
+ zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP);
+
+ /*
+ * We claim to always be readonly so we can open snapshots;
+ * other ZPL code will prevent us from writing to snapshots.
+ */
+ error = dmu_objset_own(osname, DMU_OST_ZFS, B_TRUE, zfsvfs, &os);
+ if (error) {
+ kmem_free(zfsvfs, sizeof (zfsvfs_t));
+ return (error);
+ }
+
+ zfsvfs->z_vfs = NULL;
+ zfsvfs->z_sb = NULL;
+ zfsvfs->z_parent = zfsvfs;
mutex_init(&zfsvfs->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL);
mutex_init(&zfsvfs->z_lock, NULL, MUTEX_DEFAULT, NULL);
rw_init(&zfsvfs->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL);
rw_init(&zfsvfs->z_fuid_lock, NULL, RW_DEFAULT, NULL);
- size = MIN(1 << (highbit64(zfs_object_mutex_size)-1), ZFS_OBJ_MTX_MAX);
+ int size = MIN(1 << (highbit64(zfs_object_mutex_size) - 1),
+ ZFS_OBJ_MTX_MAX);
zfsvfs->z_hold_size = size;
zfsvfs->z_hold_trees = vmem_zalloc(sizeof (avl_tree_t) * size,
KM_SLEEP);
zfsvfs->z_hold_locks = vmem_zalloc(sizeof (kmutex_t) * size, KM_SLEEP);
- for (i = 0; i != size; i++) {
+ for (int i = 0; i != size; i++) {
avl_create(&zfsvfs->z_hold_trees[i], zfs_znode_hold_compare,
sizeof (znode_hold_t), offsetof(znode_hold_t, zh_node));
mutex_init(&zfsvfs->z_hold_locks[i], NULL, MUTEX_DEFAULT, NULL);
}
+ error = zfsvfs_init(zfsvfs, os);
+ if (error != 0) {
+ dmu_objset_disown(os, zfsvfs);
+ *zfvp = NULL;
+ kmem_free(zfsvfs, sizeof (zfsvfs_t));
+ return (error);
+ }
+
*zfvp = zfsvfs;
return (0);
-
-out:
- dmu_objset_disown(os, zfsvfs);
- *zfvp = NULL;
- kmem_free(zfsvfs, sizeof (zfsvfs_t));
- return (error);
}
-int
+static int
zfsvfs_setup(zfsvfs_t *zfsvfs, boolean_t mounting)
{
int error;
}
/*
- * Reopen zfsvfs_t and release VFS ops.
+ * Rebuild SA and release VOPs. Note that ownership of the underlying dataset
+ * is an invariant across any of the operations that can be performed while the
+ * filesystem was suspended. Whether it succeeded or failed, the preconditions
+ * are the same: the relevant objset and associated dataset are owned by
+ * zfsvfs, held, and long held on entry.
*/
int
zfs_resume_fs(zfsvfs_t *zfsvfs, dsl_dataset_t *ds)
{
int err, err2;
znode_t *zp;
- uint64_t sa_obj = 0;
ASSERT(RRM_WRITE_HELD(&zfsvfs->z_teardown_lock));
ASSERT(RW_WRITE_HELD(&zfsvfs->z_teardown_inactive_lock));
* We already own this, so just update the objset_t, as the one we
* had before may have been evicted.
*/
+ objset_t *os;
VERIFY3P(ds->ds_owner, ==, zfsvfs);
VERIFY(dsl_dataset_long_held(ds));
- VERIFY0(dmu_objset_from_ds(ds, &zfsvfs->z_os));
-
- /*
- * Make sure version hasn't changed
- */
-
- err = zfs_get_zplprop(zfsvfs->z_os, ZFS_PROP_VERSION,
- &zfsvfs->z_version);
+ VERIFY0(dmu_objset_from_ds(ds, &os));
- if (err)
- goto bail;
-
- err = zap_lookup(zfsvfs->z_os, MASTER_NODE_OBJ,
- ZFS_SA_ATTRS, 8, 1, &sa_obj);
-
- if (err && zfsvfs->z_version >= ZPL_VERSION_SA)
- goto bail;
-
- if ((err = sa_setup(zfsvfs->z_os, sa_obj,
- zfs_attr_table, ZPL_END, &zfsvfs->z_attr_table)) != 0)
+ err = zfsvfs_init(zfsvfs, os);
+ if (err != 0)
goto bail;
- if (zfsvfs->z_version >= ZPL_VERSION_SA)
- sa_register_update_callback(zfsvfs->z_os,
- zfs_sa_upgrade);
-
VERIFY(zfsvfs_setup(zfsvfs, B_FALSE) == 0);
zfs_set_fuid_feature(zfsvfs);
projects / mirror_zfs.git / commitdiff