static kmem_cache_t *znode_cache = NULL;
/*ARGSUSED*/
-static void
-znode_evict_error(dmu_buf_t *dbuf, void *user_ptr)
-{
- /*
- * We should never drop all dbuf refs without first clearing
- * the eviction callback.
- */
- panic("evicting znode %p\n", user_ptr);
-}
-
-/*ARGSUSED*/
static int
zfs_znode_cache_constructor(void *buf, void *arg, int kmflags)
{
ASSERT(zp->z_acl_cached == NULL);
}
-#ifdef ZNODE_STATS
-static struct {
- uint64_t zms_zfsvfs_invalid;
- uint64_t zms_zfsvfs_recheck1;
- uint64_t zms_zfsvfs_unmounted;
- uint64_t zms_zfsvfs_recheck2;
- uint64_t zms_obj_held;
- uint64_t zms_vnode_locked;
- uint64_t zms_not_only_dnlc;
-} znode_move_stats;
-#endif /* ZNODE_STATS */
-
-static void
-zfs_znode_move_impl(znode_t *ozp, znode_t *nzp)
-{
- vnode_t *vp;
-
- /* Copy fields. */
- nzp->z_zfsvfs = ozp->z_zfsvfs;
-
- /* Swap vnodes. */
- vp = nzp->z_vnode;
- nzp->z_vnode = ozp->z_vnode;
- ozp->z_vnode = vp; /* let destructor free the overwritten vnode */
- ZTOV(ozp)->v_data = ozp;
- ZTOV(nzp)->v_data = nzp;
-
- nzp->z_id = ozp->z_id;
- ASSERT(ozp->z_dirlocks == NULL); /* znode not in use */
- ASSERT(avl_numnodes(&ozp->z_range_avl) == 0);
- nzp->z_unlinked = ozp->z_unlinked;
- nzp->z_atime_dirty = ozp->z_atime_dirty;
- nzp->z_zn_prefetch = ozp->z_zn_prefetch;
- nzp->z_blksz = ozp->z_blksz;
- nzp->z_seq = ozp->z_seq;
- nzp->z_mapcnt = ozp->z_mapcnt;
- nzp->z_gen = ozp->z_gen;
- nzp->z_sync_cnt = ozp->z_sync_cnt;
- nzp->z_is_sa = ozp->z_is_sa;
- nzp->z_sa_hdl = ozp->z_sa_hdl;
- bcopy(ozp->z_atime, nzp->z_atime, sizeof (uint64_t) * 2);
- nzp->z_links = ozp->z_links;
- nzp->z_size = ozp->z_size;
- nzp->z_pflags = ozp->z_pflags;
- nzp->z_uid = ozp->z_uid;
- nzp->z_gid = ozp->z_gid;
- nzp->z_mode = ozp->z_mode;
-
- /*
- * Since this is just an idle znode and kmem is already dealing with
- * memory pressure, release any cached ACL.
- */
- if (ozp->z_acl_cached) {
- zfs_acl_free(ozp->z_acl_cached);
- ozp->z_acl_cached = NULL;
- }
-
- sa_set_userp(nzp->z_sa_hdl, nzp);
-
- /*
- * Invalidate the original znode by clearing fields that provide a
- * pointer back to the znode. Set the low bit of the vfs pointer to
- * ensure that zfs_znode_move() recognizes the znode as invalid in any
- * subsequent callback.
- */
- ozp->z_sa_hdl = NULL;
- POINTER_INVALIDATE(&ozp->z_zfsvfs);
-
- /*
- * Mark the znode.
- */
- nzp->z_moved = 1;
- ozp->z_moved = (uint8_t)-1;
-}
-
-/*ARGSUSED*/
-static kmem_cbrc_t
-zfs_znode_move(void *buf, void *newbuf, size_t size, void *arg)
-{
- znode_t *ozp = buf, *nzp = newbuf;
- zfsvfs_t *zfsvfs;
- vnode_t *vp;
-
- /*
- * The znode is on the file system's list of known znodes if the vfs
- * pointer is valid. We set the low bit of the vfs pointer when freeing
- * the znode to invalidate it, and the memory patterns written by kmem
- * (baddcafe and deadbeef) set at least one of the two low bits. A newly
- * created znode sets the vfs pointer last of all to indicate that the
- * znode is known and in a valid state to be moved by this function.
- */
- zfsvfs = ozp->z_zfsvfs;
- if (!POINTER_IS_VALID(zfsvfs)) {
- ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_invalid);
- return (KMEM_CBRC_DONT_KNOW);
- }
-
- /*
- * Close a small window in which it's possible that the filesystem could
- * be unmounted and freed, and zfsvfs, though valid in the previous
- * statement, could point to unrelated memory by the time we try to
- * prevent the filesystem from being unmounted.
- */
- rw_enter(&zfsvfs_lock, RW_WRITER);
- if (zfsvfs != ozp->z_zfsvfs) {
- rw_exit(&zfsvfs_lock);
- ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_recheck1);
- return (KMEM_CBRC_DONT_KNOW);
- }
-
- /*
- * If the znode is still valid, then so is the file system. We know that
- * no valid file system can be freed while we hold zfsvfs_lock, so we
- * can safely ensure that the filesystem is not and will not be
- * unmounted. The next statement is equivalent to ZFS_ENTER().
- */
- rrw_enter(&zfsvfs->z_teardown_lock, RW_READER, FTAG);
- if (zfsvfs->z_unmounted) {
- ZFS_EXIT(zfsvfs);
- rw_exit(&zfsvfs_lock);
- ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_unmounted);
- return (KMEM_CBRC_DONT_KNOW);
- }
- rw_exit(&zfsvfs_lock);
-
- mutex_enter(&zfsvfs->z_znodes_lock);
- /*
- * Recheck the vfs pointer in case the znode was removed just before
- * acquiring the lock.
- */
- if (zfsvfs != ozp->z_zfsvfs) {
- mutex_exit(&zfsvfs->z_znodes_lock);
- ZFS_EXIT(zfsvfs);
- ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_recheck2);
- return (KMEM_CBRC_DONT_KNOW);
- }
-
- /*
- * At this point we know that as long as we hold z_znodes_lock, the
- * znode cannot be freed and fields within the znode can be safely
- * accessed. Now, prevent a race with zfs_zget().
- */
- if (ZFS_OBJ_HOLD_TRYENTER(zfsvfs, ozp->z_id) == 0) {
- mutex_exit(&zfsvfs->z_znodes_lock);
- ZFS_EXIT(zfsvfs);
- ZNODE_STAT_ADD(znode_move_stats.zms_obj_held);
- return (KMEM_CBRC_LATER);
- }
-
- vp = ZTOV(ozp);
- if (mutex_tryenter(&vp->v_lock) == 0) {
- ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
- mutex_exit(&zfsvfs->z_znodes_lock);
- ZFS_EXIT(zfsvfs);
- ZNODE_STAT_ADD(znode_move_stats.zms_vnode_locked);
- return (KMEM_CBRC_LATER);
- }
-
- /* Only move znodes that are referenced _only_ by the DNLC. */
- if (vp->v_count != 1 || !vn_in_dnlc(vp)) {
- mutex_exit(&vp->v_lock);
- ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
- mutex_exit(&zfsvfs->z_znodes_lock);
- ZFS_EXIT(zfsvfs);
- ZNODE_STAT_ADD(znode_move_stats.zms_not_only_dnlc);
- return (KMEM_CBRC_LATER);
- }
-
- /*
- * The znode is known and in a valid state to move. We're holding the
- * locks needed to execute the critical section.
- */
- zfs_znode_move_impl(ozp, nzp);
- mutex_exit(&vp->v_lock);
- ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id);
-
- list_link_replace(&ozp->z_link_node, &nzp->z_link_node);
- mutex_exit(&zfsvfs->z_znodes_lock);
- ZFS_EXIT(zfsvfs);
-
- return (KMEM_CBRC_YES);
-}
-
void
zfs_znode_init(void)
{
znode_cache = kmem_cache_create("zfs_znode_cache",
sizeof (znode_t), 0, zfs_znode_cache_constructor,
zfs_znode_cache_destructor, NULL, NULL, NULL, 0);
- kmem_cache_set_move(znode_cache, zfs_znode_move);
}
void
/*
* Cleanup vfs & vnode ops
*/
+#ifdef HAVE_ZPL
zfs_remove_op_tables();
+#endif /* HAVE_ZPL */
/*
* Cleanup zcache
rw_destroy(&zfsvfs_lock);
}
+#ifdef HAVE_ZPL
struct vnodeops *zfs_dvnodeops;
struct vnodeops *zfs_fvnodeops;
struct vnodeops *zfs_symvnodeops;
int
zfs_create_share_dir(zfsvfs_t *zfsvfs, dmu_tx_t *tx)
{
+#ifdef HAVE_SHARE
zfs_acl_ids_t acl_ids;
vattr_t vattr;
znode_t *sharezp;
kmem_cache_free(znode_cache, sharezp);
return (error);
+#else
+ return (0);
+#endif /* HAVE_SHARE */
}
/*
#define MAXMIN64 0xffffffffUL
#endif
+#endif /* HAVE_ZPL */
+
/*
* Create special expldev for ZFS private use.
* Can't use standard expldev since it doesn't do
dmu_object_type_t obj_type, sa_handle_t *hdl)
{
znode_t *zp;
+#ifdef HAVE_ZPL
vnode_t *vp;
uint64_t mode;
uint64_t parent;
sa_bulk_attr_t bulk[9];
int count = 0;
+#endif /* HAVE_ZPL */
zp = kmem_cache_alloc(znode_cache, KM_SLEEP);
zp->z_seq = 0x7A4653;
zp->z_sync_cnt = 0;
+#ifdef HAVE_ZPL
vp = ZTOV(zp);
vn_reinit(vp);
vn_setops(vp, zfs_evnodeops);
break;
}
-
+#endif /* HAVE_ZPL */
mutex_enter(&zfsvfs->z_znodes_lock);
list_insert_tail(&zfsvfs->z_all_znodes, zp);
membar_producer();
int bonuslen;
sa_handle_t *sa_hdl;
dmu_object_type_t obj_type;
- sa_bulk_attr_t sa_attrs[ZPL_END];
+ sa_bulk_attr_t *sa_attrs;
int cnt = 0;
zfs_acl_locator_cb_t locate = { 0 };
* order for DMU_OT_ZNODE is critical since it needs to be constructed
* in the old znode_phys_t format. Don't change this ordering
*/
+ sa_attrs = kmem_alloc(sizeof(sa_bulk_attr_t) * ZPL_END, KM_SLEEP);
if (obj_type == DMU_OT_ZNODE) {
SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zfsvfs),
if (obj_type == DMU_OT_ZNODE ||
acl_ids->z_aclp->z_version < ZFS_ACL_VERSION_FUID) {
err = zfs_aclset_common(*zpp, acl_ids->z_aclp, cr, tx);
- ASSERT3P(err, ==, 0);
+ ASSERT3S(err, ==, 0);
}
+ kmem_free(sa_attrs, sizeof(sa_bulk_attr_t) * ZPL_END);
ZFS_OBJ_HOLD_EXIT(zfsvfs, obj);
}
void
zfs_xvattr_set(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx)
{
+#ifdef HAVE_XVATTR
xoptattr_t *xoap;
xoap = xva_getxoptattr(xvap);
zp->z_pflags, tx);
XVA_SET_RTN(xvap, XAT_SPARSE);
}
+#endif /* HAVE_XVATTR */
}
int
dmu_object_size_from_db(sa_get_db(zp->z_sa_hdl), &zp->z_blksz, &dummy);
}
+#ifdef HAVE_ZPL
/*
* This is a dummy interface used when pvn_vplist_dirty() should *not*
* be calling back into the fs for a putpage(). E.g.: when truncating
ASSERT(0);
return (0);
}
+#endif /* HAVE_ZPL */
/*
* Increase the file length
zfs_trunc(znode_t *zp, uint64_t end)
{
zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+#ifdef HAVE_ZPL
vnode_t *vp = ZTOV(zp);
+#endif /* HAVE_ZPL */
dmu_tx_t *tx;
rl_t *rl;
int error;
dmu_tx_commit(tx);
+#ifdef HAVE_ZPL
/*
* Clear any mapped pages in the truncated region. This has to
* happen outside of the transaction to avoid the possibility of
B_INVAL | B_TRUNC, NULL);
ASSERT(error == 0);
}
+#endif /* HAVE_ZPL */
zfs_range_unlock(rl);
int
zfs_freesp(znode_t *zp, uint64_t off, uint64_t len, int flag, boolean_t log)
{
+#ifdef HAVE_ZPL
vnode_t *vp = ZTOV(zp);
+#endif /* HAVE_ZPL */
dmu_tx_t *tx;
zfsvfs_t *zfsvfs = zp->z_zfsvfs;
zilog_t *zilog = zfsvfs->z_log;
return (error);
}
+#ifdef HAVE_ZPL
/*
* Check for any locks in the region to be freed.
*/
if (error = chklock(vp, FWRITE, off, length, flag, NULL))
return (error);
}
+#endif /* HAVE_ZPL */
if (len == 0) {
error = zfs_trunc(zp, off);
void
zfs_create_fs(objset_t *os, cred_t *cr, nvlist_t *zplprops, dmu_tx_t *tx)
{
- zfsvfs_t zfsvfs;
uint64_t moid, obj, sa_obj, version;
uint64_t sense = ZFS_CASE_SENSITIVE;
uint64_t norm = 0;
nvpair_t *elem;
int error;
+#ifdef HAVE_ZPL
+ zfsvfs_t zfsvfs;
int i;
znode_t *rootzp = NULL;
vnode_t *vp;
vattr_t vattr;
znode_t *zp;
zfs_acl_ids_t acl_ids;
+#else
+ timestruc_t now;
+ dmu_buf_t *db;
+ znode_phys_t *pzp;
+#endif /* HAVE_ZPL */
/*
* First attempt to create master node.
error = zap_add(os, moid, ZFS_UNLINKED_SET, 8, 1, &obj, tx);
ASSERT(error == 0);
+#ifdef HAVE_ZPL
/*
* Create root znode. Create minimal znode/vnode/zfsvfs
* to allow zfs_mknode to work.
if (sense == ZFS_CASE_INSENSITIVE || sense == ZFS_CASE_MIXED)
zfsvfs.z_norm |= U8_TEXTPREP_TOUPPER;
+ /* XXX - This must be destroyed but I'm not quite sure yet so
+ * I'm just annotating that fact when it's an issue. -Brian */
mutex_init(&zfsvfs.z_znodes_lock, NULL, MUTEX_DEFAULT, NULL);
list_create(&zfsvfs.z_all_znodes, sizeof (znode_t),
offsetof(znode_t, z_link_node));
ZTOV(rootzp)->v_count = 0;
sa_handle_destroy(rootzp->z_sa_hdl);
kmem_cache_free(znode_cache, rootzp);
+ error = zfs_create_share_dir(&zfsvfs, tx);
+ for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
+ mutex_destroy(&zfsvfs.z_hold_mtx[i]);
+#else
/*
- * Create shares directory
+ * Create root znode with code free of VFS dependencies
*/
+ obj = zap_create_norm(os, norm, DMU_OT_DIRECTORY_CONTENTS,
+ DMU_OT_ZNODE, sizeof (znode_phys_t), tx);
- error = zfs_create_share_dir(&zfsvfs, tx);
+ VERIFY(0 == dmu_bonus_hold(os, obj, FTAG, &db));
+ dmu_buf_will_dirty(db, tx);
+ /*
+ * Initialize the znode physical data to zero.
+ */
+ ASSERT(db->db_size >= sizeof (znode_phys_t));
+ bzero(db->db_data, db->db_size);
+ pzp = db->db_data;
+
+ if (USE_FUIDS(version, os))
+ pzp->zp_flags = ZFS_ARCHIVE | ZFS_AV_MODIFIED;
+
+ pzp->zp_size = 2; /* "." and ".." */
+ pzp->zp_links = 2;
+ pzp->zp_parent = obj;
+ pzp->zp_gen = dmu_tx_get_txg(tx);
+ pzp->zp_mode = S_IFDIR | 0755;
+ pzp->zp_flags = ZFS_ACL_TRIVIAL;
+
+ gethrestime(&now);
+
+ ZFS_TIME_ENCODE(&now, pzp->zp_crtime);
+ ZFS_TIME_ENCODE(&now, pzp->zp_ctime);
+ ZFS_TIME_ENCODE(&now, pzp->zp_atime);
+ ZFS_TIME_ENCODE(&now, pzp->zp_mtime);
+
+ error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &obj, tx);
ASSERT(error == 0);
- for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
- mutex_destroy(&zfsvfs.z_hold_mtx[i]);
+ dmu_buf_rele(db, FTAG);
+#endif /* HAVE_ZPL */
}
#endif /* _KERNEL */
dmu_object_info_from_db(*db, &doi);
if ((doi.doi_bonus_type != DMU_OT_SA &&
doi.doi_bonus_type != DMU_OT_ZNODE) ||
- doi.doi_bonus_type == DMU_OT_ZNODE &&
- doi.doi_bonus_size < sizeof (znode_phys_t)) {
+ (doi.doi_bonus_type == DMU_OT_ZNODE &&
+ doi.doi_bonus_size < sizeof (znode_phys_t))) {
sa_buf_rele(*db, FTAG);
return (ENOTSUP);
}
zfs_release_sa_handle(hdl, db);
return (error);
}
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(zfs_create_fs);
+EXPORT_SYMBOL(zfs_obj_to_path);
+#endif
git://git.camperquake.de / zfs.git / blobdiff