summaryrefslogtreecommitdiff
path: root/uts/common/fs/zfs/zfs_znode.c
diff options
context:
space:
mode:
Diffstat (limited to 'uts/common/fs/zfs/zfs_znode.c')
-rw-r--r--uts/common/fs/zfs/zfs_znode.c2121
1 files changed, 2121 insertions, 0 deletions
diff --git a/uts/common/fs/zfs/zfs_znode.c b/uts/common/fs/zfs/zfs_znode.c
new file mode 100644
index 000000000000..12639a44a9c4
--- /dev/null
+++ b/uts/common/fs/zfs/zfs_znode.c
@@ -0,0 +1,2121 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/* Portions Copyright 2007 Jeremy Teo */
+
+#ifdef _KERNEL
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/systm.h>
+#include <sys/sysmacros.h>
+#include <sys/resource.h>
+#include <sys/mntent.h>
+#include <sys/mkdev.h>
+#include <sys/u8_textprep.h>
+#include <sys/dsl_dataset.h>
+#include <sys/vfs.h>
+#include <sys/vfs_opreg.h>
+#include <sys/vnode.h>
+#include <sys/file.h>
+#include <sys/kmem.h>
+#include <sys/errno.h>
+#include <sys/unistd.h>
+#include <sys/mode.h>
+#include <sys/atomic.h>
+#include <vm/pvn.h>
+#include "fs/fs_subr.h"
+#include <sys/zfs_dir.h>
+#include <sys/zfs_acl.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/zfs_rlock.h>
+#include <sys/zfs_fuid.h>
+#include <sys/dnode.h>
+#include <sys/fs/zfs.h>
+#include <sys/kidmap.h>
+#endif /* _KERNEL */
+
+#include <sys/dmu.h>
+#include <sys/refcount.h>
+#include <sys/stat.h>
+#include <sys/zap.h>
+#include <sys/zfs_znode.h>
+#include <sys/sa.h>
+#include <sys/zfs_sa.h>
+#include <sys/zfs_stat.h>
+
+#include "zfs_prop.h"
+#include "zfs_comutil.h"
+
+/*
+ * Define ZNODE_STATS to turn on statistic gathering. By default, it is only
+ * turned on when DEBUG is also defined.
+ */
+#ifdef DEBUG
+#define ZNODE_STATS
+#endif /* DEBUG */
+
+#ifdef ZNODE_STATS
+#define ZNODE_STAT_ADD(stat) ((stat)++)
+#else
+#define ZNODE_STAT_ADD(stat) /* nothing */
+#endif /* ZNODE_STATS */
+
+/*
+ * Functions needed for userland (ie: libzpool) are not put under
+ * #ifdef_KERNEL; the rest of the functions have dependencies
+ * (such as VFS logic) that will not compile easily in userland.
+ */
+#ifdef _KERNEL
+/*
+ * Needed to close a small window in zfs_znode_move() that allows the zfsvfs to
+ * be freed before it can be safely accessed.
+ */
+krwlock_t zfsvfs_lock;
+
+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)
+{
+ znode_t *zp = buf;
+
+ ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
+
+ zp->z_vnode = vn_alloc(kmflags);
+ if (zp->z_vnode == NULL) {
+ return (-1);
+ }
+ ZTOV(zp)->v_data = zp;
+
+ list_link_init(&zp->z_link_node);
+
+ mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL);
+ rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL);
+ rw_init(&zp->z_name_lock, NULL, RW_DEFAULT, NULL);
+ mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL);
+
+ mutex_init(&zp->z_range_lock, NULL, MUTEX_DEFAULT, NULL);
+ avl_create(&zp->z_range_avl, zfs_range_compare,
+ sizeof (rl_t), offsetof(rl_t, r_node));
+
+ zp->z_dirlocks = NULL;
+ zp->z_acl_cached = NULL;
+ zp->z_moved = 0;
+ return (0);
+}
+
+/*ARGSUSED*/
+static void
+zfs_znode_cache_destructor(void *buf, void *arg)
+{
+ znode_t *zp = buf;
+
+ ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
+ ASSERT(ZTOV(zp)->v_data == zp);
+ vn_free(ZTOV(zp));
+ ASSERT(!list_link_active(&zp->z_link_node));
+ mutex_destroy(&zp->z_lock);
+ rw_destroy(&zp->z_parent_lock);
+ rw_destroy(&zp->z_name_lock);
+ mutex_destroy(&zp->z_acl_lock);
+ avl_destroy(&zp->z_range_avl);
+ mutex_destroy(&zp->z_range_lock);
+
+ ASSERT(zp->z_dirlocks == NULL);
+ 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)
+{
+ /*
+ * Initialize zcache
+ */
+ rw_init(&zfsvfs_lock, NULL, RW_DEFAULT, NULL);
+ ASSERT(znode_cache == NULL);
+ 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
+zfs_znode_fini(void)
+{
+ /*
+ * Cleanup vfs & vnode ops
+ */
+ zfs_remove_op_tables();
+
+ /*
+ * Cleanup zcache
+ */
+ if (znode_cache)
+ kmem_cache_destroy(znode_cache);
+ znode_cache = NULL;
+ rw_destroy(&zfsvfs_lock);
+}
+
+struct vnodeops *zfs_dvnodeops;
+struct vnodeops *zfs_fvnodeops;
+struct vnodeops *zfs_symvnodeops;
+struct vnodeops *zfs_xdvnodeops;
+struct vnodeops *zfs_evnodeops;
+struct vnodeops *zfs_sharevnodeops;
+
+void
+zfs_remove_op_tables()
+{
+ /*
+ * Remove vfs ops
+ */
+ ASSERT(zfsfstype);
+ (void) vfs_freevfsops_by_type(zfsfstype);
+ zfsfstype = 0;
+
+ /*
+ * Remove vnode ops
+ */
+ if (zfs_dvnodeops)
+ vn_freevnodeops(zfs_dvnodeops);
+ if (zfs_fvnodeops)
+ vn_freevnodeops(zfs_fvnodeops);
+ if (zfs_symvnodeops)
+ vn_freevnodeops(zfs_symvnodeops);
+ if (zfs_xdvnodeops)
+ vn_freevnodeops(zfs_xdvnodeops);
+ if (zfs_evnodeops)
+ vn_freevnodeops(zfs_evnodeops);
+ if (zfs_sharevnodeops)
+ vn_freevnodeops(zfs_sharevnodeops);
+
+ zfs_dvnodeops = NULL;
+ zfs_fvnodeops = NULL;
+ zfs_symvnodeops = NULL;
+ zfs_xdvnodeops = NULL;
+ zfs_evnodeops = NULL;
+ zfs_sharevnodeops = NULL;
+}
+
+extern const fs_operation_def_t zfs_dvnodeops_template[];
+extern const fs_operation_def_t zfs_fvnodeops_template[];
+extern const fs_operation_def_t zfs_xdvnodeops_template[];
+extern const fs_operation_def_t zfs_symvnodeops_template[];
+extern const fs_operation_def_t zfs_evnodeops_template[];
+extern const fs_operation_def_t zfs_sharevnodeops_template[];
+
+int
+zfs_create_op_tables()
+{
+ int error;
+
+ /*
+ * zfs_dvnodeops can be set if mod_remove() calls mod_installfs()
+ * due to a failure to remove the the 2nd modlinkage (zfs_modldrv).
+ * In this case we just return as the ops vectors are already set up.
+ */
+ if (zfs_dvnodeops)
+ return (0);
+
+ error = vn_make_ops(MNTTYPE_ZFS, zfs_dvnodeops_template,
+ &zfs_dvnodeops);
+ if (error)
+ return (error);
+
+ error = vn_make_ops(MNTTYPE_ZFS, zfs_fvnodeops_template,
+ &zfs_fvnodeops);
+ if (error)
+ return (error);
+
+ error = vn_make_ops(MNTTYPE_ZFS, zfs_symvnodeops_template,
+ &zfs_symvnodeops);
+ if (error)
+ return (error);
+
+ error = vn_make_ops(MNTTYPE_ZFS, zfs_xdvnodeops_template,
+ &zfs_xdvnodeops);
+ if (error)
+ return (error);
+
+ error = vn_make_ops(MNTTYPE_ZFS, zfs_evnodeops_template,
+ &zfs_evnodeops);
+ if (error)
+ return (error);
+
+ error = vn_make_ops(MNTTYPE_ZFS, zfs_sharevnodeops_template,
+ &zfs_sharevnodeops);
+
+ return (error);
+}
+
+int
+zfs_create_share_dir(zfsvfs_t *zfsvfs, dmu_tx_t *tx)
+{
+ zfs_acl_ids_t acl_ids;
+ vattr_t vattr;
+ znode_t *sharezp;
+ vnode_t *vp;
+ znode_t *zp;
+ int error;
+
+ vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
+ vattr.va_type = VDIR;
+ vattr.va_mode = S_IFDIR|0555;
+ vattr.va_uid = crgetuid(kcred);
+ vattr.va_gid = crgetgid(kcred);
+
+ sharezp = kmem_cache_alloc(znode_cache, KM_SLEEP);
+ ASSERT(!POINTER_IS_VALID(sharezp->z_zfsvfs));
+ sharezp->z_moved = 0;
+ sharezp->z_unlinked = 0;
+ sharezp->z_atime_dirty = 0;
+ sharezp->z_zfsvfs = zfsvfs;
+ sharezp->z_is_sa = zfsvfs->z_use_sa;
+
+ vp = ZTOV(sharezp);
+ vn_reinit(vp);
+ vp->v_type = VDIR;
+
+ VERIFY(0 == zfs_acl_ids_create(sharezp, IS_ROOT_NODE, &vattr,
+ kcred, NULL, &acl_ids));
+ zfs_mknode(sharezp, &vattr, tx, kcred, IS_ROOT_NODE, &zp, &acl_ids);
+ ASSERT3P(zp, ==, sharezp);
+ ASSERT(!vn_in_dnlc(ZTOV(sharezp))); /* not valid to move */
+ POINTER_INVALIDATE(&sharezp->z_zfsvfs);
+ error = zap_add(zfsvfs->z_os, MASTER_NODE_OBJ,
+ ZFS_SHARES_DIR, 8, 1, &sharezp->z_id, tx);
+ zfsvfs->z_shares_dir = sharezp->z_id;
+
+ zfs_acl_ids_free(&acl_ids);
+ ZTOV(sharezp)->v_count = 0;
+ sa_handle_destroy(sharezp->z_sa_hdl);
+ kmem_cache_free(znode_cache, sharezp);
+
+ return (error);
+}
+
+/*
+ * define a couple of values we need available
+ * for both 64 and 32 bit environments.
+ */
+#ifndef NBITSMINOR64
+#define NBITSMINOR64 32
+#endif
+#ifndef MAXMAJ64
+#define MAXMAJ64 0xffffffffUL
+#endif
+#ifndef MAXMIN64
+#define MAXMIN64 0xffffffffUL
+#endif
+
+/*
+ * Create special expldev for ZFS private use.
+ * Can't use standard expldev since it doesn't do
+ * what we want. The standard expldev() takes a
+ * dev32_t in LP64 and expands it to a long dev_t.
+ * We need an interface that takes a dev32_t in ILP32
+ * and expands it to a long dev_t.
+ */
+static uint64_t
+zfs_expldev(dev_t dev)
+{
+#ifndef _LP64
+ major_t major = (major_t)dev >> NBITSMINOR32 & MAXMAJ32;
+ return (((uint64_t)major << NBITSMINOR64) |
+ ((minor_t)dev & MAXMIN32));
+#else
+ return (dev);
+#endif
+}
+
+/*
+ * Special cmpldev for ZFS private use.
+ * Can't use standard cmpldev since it takes
+ * a long dev_t and compresses it to dev32_t in
+ * LP64. We need to do a compaction of a long dev_t
+ * to a dev32_t in ILP32.
+ */
+dev_t
+zfs_cmpldev(uint64_t dev)
+{
+#ifndef _LP64
+ minor_t minor = (minor_t)dev & MAXMIN64;
+ major_t major = (major_t)(dev >> NBITSMINOR64) & MAXMAJ64;
+
+ if (major > MAXMAJ32 || minor > MAXMIN32)
+ return (NODEV32);
+
+ return (((dev32_t)major << NBITSMINOR32) | minor);
+#else
+ return (dev);
+#endif
+}
+
+static void
+zfs_znode_sa_init(zfsvfs_t *zfsvfs, znode_t *zp,
+ dmu_buf_t *db, dmu_object_type_t obj_type, sa_handle_t *sa_hdl)
+{
+ ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs) || (zfsvfs == zp->z_zfsvfs));
+ ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zfsvfs, zp->z_id)));
+
+ mutex_enter(&zp->z_lock);
+
+ ASSERT(zp->z_sa_hdl == NULL);
+ ASSERT(zp->z_acl_cached == NULL);
+ if (sa_hdl == NULL) {
+ VERIFY(0 == sa_handle_get_from_db(zfsvfs->z_os, db, zp,
+ SA_HDL_SHARED, &zp->z_sa_hdl));
+ } else {
+ zp->z_sa_hdl = sa_hdl;
+ sa_set_userp(sa_hdl, zp);
+ }
+
+ zp->z_is_sa = (obj_type == DMU_OT_SA) ? B_TRUE : B_FALSE;
+
+ /*
+ * Slap on VROOT if we are the root znode
+ */
+ if (zp->z_id == zfsvfs->z_root)
+ ZTOV(zp)->v_flag |= VROOT;
+
+ mutex_exit(&zp->z_lock);
+ vn_exists(ZTOV(zp));
+}
+
+void
+zfs_znode_dmu_fini(znode_t *zp)
+{
+ ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zp->z_zfsvfs, zp->z_id)) ||
+ zp->z_unlinked ||
+ RW_WRITE_HELD(&zp->z_zfsvfs->z_teardown_inactive_lock));
+
+ sa_handle_destroy(zp->z_sa_hdl);
+ zp->z_sa_hdl = NULL;
+}
+
+/*
+ * Construct a new znode/vnode and intialize.
+ *
+ * This does not do a call to dmu_set_user() that is
+ * up to the caller to do, in case you don't want to
+ * return the znode
+ */
+static znode_t *
+zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz,
+ dmu_object_type_t obj_type, sa_handle_t *hdl)
+{
+ znode_t *zp;
+ vnode_t *vp;
+ uint64_t mode;
+ uint64_t parent;
+ sa_bulk_attr_t bulk[9];
+ int count = 0;
+
+ zp = kmem_cache_alloc(znode_cache, KM_SLEEP);
+
+ ASSERT(zp->z_dirlocks == NULL);
+ ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
+ zp->z_moved = 0;
+
+ /*
+ * Defer setting z_zfsvfs until the znode is ready to be a candidate for
+ * the zfs_znode_move() callback.
+ */
+ zp->z_sa_hdl = NULL;
+ zp->z_unlinked = 0;
+ zp->z_atime_dirty = 0;
+ zp->z_mapcnt = 0;
+ zp->z_id = db->db_object;
+ zp->z_blksz = blksz;
+ zp->z_seq = 0x7A4653;
+ zp->z_sync_cnt = 0;
+
+ vp = ZTOV(zp);
+ vn_reinit(vp);
+
+ zfs_znode_sa_init(zfsvfs, zp, db, obj_type, hdl);
+
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL, &zp->z_gen, 8);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL,
+ &zp->z_size, 8);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs), NULL,
+ &zp->z_links, 8);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+ &zp->z_pflags, 8);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
+ &zp->z_atime, 16);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
+ &zp->z_uid, 8);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL,
+ &zp->z_gid, 8);
+
+ if (sa_bulk_lookup(zp->z_sa_hdl, bulk, count) != 0 || zp->z_gen == 0) {
+ if (hdl == NULL)
+ sa_handle_destroy(zp->z_sa_hdl);
+ kmem_cache_free(znode_cache, zp);
+ return (NULL);
+ }
+
+ zp->z_mode = mode;
+ vp->v_vfsp = zfsvfs->z_parent->z_vfs;
+
+ vp->v_type = IFTOVT((mode_t)mode);
+
+ switch (vp->v_type) {
+ case VDIR:
+ if (zp->z_pflags & ZFS_XATTR) {
+ vn_setops(vp, zfs_xdvnodeops);
+ vp->v_flag |= V_XATTRDIR;
+ } else {
+ vn_setops(vp, zfs_dvnodeops);
+ }
+ zp->z_zn_prefetch = B_TRUE; /* z_prefetch default is enabled */
+ break;
+ case VBLK:
+ case VCHR:
+ {
+ uint64_t rdev;
+ VERIFY(sa_lookup(zp->z_sa_hdl, SA_ZPL_RDEV(zfsvfs),
+ &rdev, sizeof (rdev)) == 0);
+
+ vp->v_rdev = zfs_cmpldev(rdev);
+ }
+ /*FALLTHROUGH*/
+ case VFIFO:
+ case VSOCK:
+ case VDOOR:
+ vn_setops(vp, zfs_fvnodeops);
+ break;
+ case VREG:
+ vp->v_flag |= VMODSORT;
+ if (parent == zfsvfs->z_shares_dir) {
+ ASSERT(zp->z_uid == 0 && zp->z_gid == 0);
+ vn_setops(vp, zfs_sharevnodeops);
+ } else {
+ vn_setops(vp, zfs_fvnodeops);
+ }
+ break;
+ case VLNK:
+ vn_setops(vp, zfs_symvnodeops);
+ break;
+ default:
+ vn_setops(vp, zfs_evnodeops);
+ break;
+ }
+
+ mutex_enter(&zfsvfs->z_znodes_lock);
+ list_insert_tail(&zfsvfs->z_all_znodes, zp);
+ membar_producer();
+ /*
+ * Everything else must be valid before assigning z_zfsvfs makes the
+ * znode eligible for zfs_znode_move().
+ */
+ zp->z_zfsvfs = zfsvfs;
+ mutex_exit(&zfsvfs->z_znodes_lock);
+
+ VFS_HOLD(zfsvfs->z_vfs);
+ return (zp);
+}
+
+static uint64_t empty_xattr;
+static uint64_t pad[4];
+static zfs_acl_phys_t acl_phys;
+/*
+ * Create a new DMU object to hold a zfs znode.
+ *
+ * IN: dzp - parent directory for new znode
+ * vap - file attributes for new znode
+ * tx - dmu transaction id for zap operations
+ * cr - credentials of caller
+ * flag - flags:
+ * IS_ROOT_NODE - new object will be root
+ * IS_XATTR - new object is an attribute
+ * bonuslen - length of bonus buffer
+ * setaclp - File/Dir initial ACL
+ * fuidp - Tracks fuid allocation.
+ *
+ * OUT: zpp - allocated znode
+ *
+ */
+void
+zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr,
+ uint_t flag, znode_t **zpp, zfs_acl_ids_t *acl_ids)
+{
+ uint64_t crtime[2], atime[2], mtime[2], ctime[2];
+ uint64_t mode, size, links, parent, pflags;
+ uint64_t dzp_pflags = 0;
+ uint64_t rdev = 0;
+ zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
+ dmu_buf_t *db;
+ timestruc_t now;
+ uint64_t gen, obj;
+ int err;
+ int bonuslen;
+ sa_handle_t *sa_hdl;
+ dmu_object_type_t obj_type;
+ sa_bulk_attr_t sa_attrs[ZPL_END];
+ int cnt = 0;
+ zfs_acl_locator_cb_t locate = { 0 };
+
+ ASSERT(vap && (vap->va_mask & (AT_TYPE|AT_MODE)) == (AT_TYPE|AT_MODE));
+
+ if (zfsvfs->z_replay) {
+ obj = vap->va_nodeid;
+ now = vap->va_ctime; /* see zfs_replay_create() */
+ gen = vap->va_nblocks; /* ditto */
+ } else {
+ obj = 0;
+ gethrestime(&now);
+ gen = dmu_tx_get_txg(tx);
+ }
+
+ obj_type = zfsvfs->z_use_sa ? DMU_OT_SA : DMU_OT_ZNODE;
+ bonuslen = (obj_type == DMU_OT_SA) ?
+ DN_MAX_BONUSLEN : ZFS_OLD_ZNODE_PHYS_SIZE;
+
+ /*
+ * Create a new DMU object.
+ */
+ /*
+ * There's currently no mechanism for pre-reading the blocks that will
+ * be needed to allocate a new object, so we accept the small chance
+ * that there will be an i/o error and we will fail one of the
+ * assertions below.
+ */
+ if (vap->va_type == VDIR) {
+ if (zfsvfs->z_replay) {
+ err = zap_create_claim_norm(zfsvfs->z_os, obj,
+ zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS,
+ obj_type, bonuslen, tx);
+ ASSERT3U(err, ==, 0);
+ } else {
+ obj = zap_create_norm(zfsvfs->z_os,
+ zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS,
+ obj_type, bonuslen, tx);
+ }
+ } else {
+ if (zfsvfs->z_replay) {
+ err = dmu_object_claim(zfsvfs->z_os, obj,
+ DMU_OT_PLAIN_FILE_CONTENTS, 0,
+ obj_type, bonuslen, tx);
+ ASSERT3U(err, ==, 0);
+ } else {
+ obj = dmu_object_alloc(zfsvfs->z_os,
+ DMU_OT_PLAIN_FILE_CONTENTS, 0,
+ obj_type, bonuslen, tx);
+ }
+ }
+
+ ZFS_OBJ_HOLD_ENTER(zfsvfs, obj);
+ VERIFY(0 == sa_buf_hold(zfsvfs->z_os, obj, NULL, &db));
+
+ /*
+ * If this is the root, fix up the half-initialized parent pointer
+ * to reference the just-allocated physical data area.
+ */
+ if (flag & IS_ROOT_NODE) {
+ dzp->z_id = obj;
+ } else {
+ dzp_pflags = dzp->z_pflags;
+ }
+
+ /*
+ * If parent is an xattr, so am I.
+ */
+ if (dzp_pflags & ZFS_XATTR) {
+ flag |= IS_XATTR;
+ }
+
+ if (zfsvfs->z_use_fuids)
+ pflags = ZFS_ARCHIVE | ZFS_AV_MODIFIED;
+ else
+ pflags = 0;
+
+ if (vap->va_type == VDIR) {
+ size = 2; /* contents ("." and "..") */
+ links = (flag & (IS_ROOT_NODE | IS_XATTR)) ? 2 : 1;
+ } else {
+ size = links = 0;
+ }
+
+ if (vap->va_type == VBLK || vap->va_type == VCHR) {
+ rdev = zfs_expldev(vap->va_rdev);
+ }
+
+ parent = dzp->z_id;
+ mode = acl_ids->z_mode;
+ if (flag & IS_XATTR)
+ pflags |= ZFS_XATTR;
+
+ /*
+ * No execs denied will be deterimed when zfs_mode_compute() is called.
+ */
+ pflags |= acl_ids->z_aclp->z_hints &
+ (ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|ZFS_ACL_AUTO_INHERIT|
+ ZFS_ACL_DEFAULTED|ZFS_ACL_PROTECTED);
+
+ ZFS_TIME_ENCODE(&now, crtime);
+ ZFS_TIME_ENCODE(&now, ctime);
+
+ if (vap->va_mask & AT_ATIME) {
+ ZFS_TIME_ENCODE(&vap->va_atime, atime);
+ } else {
+ ZFS_TIME_ENCODE(&now, atime);
+ }
+
+ if (vap->va_mask & AT_MTIME) {
+ ZFS_TIME_ENCODE(&vap->va_mtime, mtime);
+ } else {
+ ZFS_TIME_ENCODE(&now, mtime);
+ }
+
+ /* Now add in all of the "SA" attributes */
+ VERIFY(0 == sa_handle_get_from_db(zfsvfs->z_os, db, NULL, SA_HDL_SHARED,
+ &sa_hdl));
+
+ /*
+ * Setup the array of attributes to be replaced/set on the new file
+ *
+ * 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
+ */
+
+ if (obj_type == DMU_OT_ZNODE) {
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zfsvfs),
+ NULL, &atime, 16);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MTIME(zfsvfs),
+ NULL, &mtime, 16);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CTIME(zfsvfs),
+ NULL, &ctime, 16);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CRTIME(zfsvfs),
+ NULL, &crtime, 16);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GEN(zfsvfs),
+ NULL, &gen, 8);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MODE(zfsvfs),
+ NULL, &mode, 8);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_SIZE(zfsvfs),
+ NULL, &size, 8);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PARENT(zfsvfs),
+ NULL, &parent, 8);
+ } else {
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MODE(zfsvfs),
+ NULL, &mode, 8);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_SIZE(zfsvfs),
+ NULL, &size, 8);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GEN(zfsvfs),
+ NULL, &gen, 8);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_UID(zfsvfs), NULL,
+ &acl_ids->z_fuid, 8);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GID(zfsvfs), NULL,
+ &acl_ids->z_fgid, 8);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PARENT(zfsvfs),
+ NULL, &parent, 8);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_FLAGS(zfsvfs),
+ NULL, &pflags, 8);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zfsvfs),
+ NULL, &atime, 16);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MTIME(zfsvfs),
+ NULL, &mtime, 16);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CTIME(zfsvfs),
+ NULL, &ctime, 16);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CRTIME(zfsvfs),
+ NULL, &crtime, 16);
+ }
+
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_LINKS(zfsvfs), NULL, &links, 8);
+
+ if (obj_type == DMU_OT_ZNODE) {
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_XATTR(zfsvfs), NULL,
+ &empty_xattr, 8);
+ }
+ if (obj_type == DMU_OT_ZNODE ||
+ (vap->va_type == VBLK || vap->va_type == VCHR)) {
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_RDEV(zfsvfs),
+ NULL, &rdev, 8);
+
+ }
+ if (obj_type == DMU_OT_ZNODE) {
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_FLAGS(zfsvfs),
+ NULL, &pflags, 8);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_UID(zfsvfs), NULL,
+ &acl_ids->z_fuid, 8);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GID(zfsvfs), NULL,
+ &acl_ids->z_fgid, 8);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PAD(zfsvfs), NULL, pad,
+ sizeof (uint64_t) * 4);
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
+ &acl_phys, sizeof (zfs_acl_phys_t));
+ } else if (acl_ids->z_aclp->z_version >= ZFS_ACL_VERSION_FUID) {
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_DACL_COUNT(zfsvfs), NULL,
+ &acl_ids->z_aclp->z_acl_count, 8);
+ locate.cb_aclp = acl_ids->z_aclp;
+ SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_DACL_ACES(zfsvfs),
+ zfs_acl_data_locator, &locate,
+ acl_ids->z_aclp->z_acl_bytes);
+ mode = zfs_mode_compute(mode, acl_ids->z_aclp, &pflags,
+ acl_ids->z_fuid, acl_ids->z_fgid);
+ }
+
+ VERIFY(sa_replace_all_by_template(sa_hdl, sa_attrs, cnt, tx) == 0);
+
+ if (!(flag & IS_ROOT_NODE)) {
+ *zpp = zfs_znode_alloc(zfsvfs, db, 0, obj_type, sa_hdl);
+ ASSERT(*zpp != NULL);
+ } else {
+ /*
+ * If we are creating the root node, the "parent" we
+ * passed in is the znode for the root.
+ */
+ *zpp = dzp;
+
+ (*zpp)->z_sa_hdl = sa_hdl;
+ }
+
+ (*zpp)->z_pflags = pflags;
+ (*zpp)->z_mode = mode;
+
+ if (vap->va_mask & AT_XVATTR)
+ zfs_xvattr_set(*zpp, (xvattr_t *)vap, tx);
+
+ 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);
+ }
+ ZFS_OBJ_HOLD_EXIT(zfsvfs, obj);
+}
+
+/*
+ * zfs_xvattr_set only updates the in-core attributes
+ * it is assumed the caller will be doing an sa_bulk_update
+ * to push the changes out
+ */
+void
+zfs_xvattr_set(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx)
+{
+ xoptattr_t *xoap;
+
+ xoap = xva_getxoptattr(xvap);
+ ASSERT(xoap);
+
+ if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) {
+ uint64_t times[2];
+ ZFS_TIME_ENCODE(&xoap->xoa_createtime, times);
+ (void) sa_update(zp->z_sa_hdl, SA_ZPL_CRTIME(zp->z_zfsvfs),
+ &times, sizeof (times), tx);
+ XVA_SET_RTN(xvap, XAT_CREATETIME);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_READONLY)) {
+ ZFS_ATTR_SET(zp, ZFS_READONLY, xoap->xoa_readonly,
+ zp->z_pflags, tx);
+ XVA_SET_RTN(xvap, XAT_READONLY);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) {
+ ZFS_ATTR_SET(zp, ZFS_HIDDEN, xoap->xoa_hidden,
+ zp->z_pflags, tx);
+ XVA_SET_RTN(xvap, XAT_HIDDEN);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) {
+ ZFS_ATTR_SET(zp, ZFS_SYSTEM, xoap->xoa_system,
+ zp->z_pflags, tx);
+ XVA_SET_RTN(xvap, XAT_SYSTEM);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) {
+ ZFS_ATTR_SET(zp, ZFS_ARCHIVE, xoap->xoa_archive,
+ zp->z_pflags, tx);
+ XVA_SET_RTN(xvap, XAT_ARCHIVE);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
+ ZFS_ATTR_SET(zp, ZFS_IMMUTABLE, xoap->xoa_immutable,
+ zp->z_pflags, tx);
+ XVA_SET_RTN(xvap, XAT_IMMUTABLE);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
+ ZFS_ATTR_SET(zp, ZFS_NOUNLINK, xoap->xoa_nounlink,
+ zp->z_pflags, tx);
+ XVA_SET_RTN(xvap, XAT_NOUNLINK);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
+ ZFS_ATTR_SET(zp, ZFS_APPENDONLY, xoap->xoa_appendonly,
+ zp->z_pflags, tx);
+ XVA_SET_RTN(xvap, XAT_APPENDONLY);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
+ ZFS_ATTR_SET(zp, ZFS_NODUMP, xoap->xoa_nodump,
+ zp->z_pflags, tx);
+ XVA_SET_RTN(xvap, XAT_NODUMP);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) {
+ ZFS_ATTR_SET(zp, ZFS_OPAQUE, xoap->xoa_opaque,
+ zp->z_pflags, tx);
+ XVA_SET_RTN(xvap, XAT_OPAQUE);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
+ ZFS_ATTR_SET(zp, ZFS_AV_QUARANTINED,
+ xoap->xoa_av_quarantined, zp->z_pflags, tx);
+ XVA_SET_RTN(xvap, XAT_AV_QUARANTINED);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
+ ZFS_ATTR_SET(zp, ZFS_AV_MODIFIED, xoap->xoa_av_modified,
+ zp->z_pflags, tx);
+ XVA_SET_RTN(xvap, XAT_AV_MODIFIED);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) {
+ zfs_sa_set_scanstamp(zp, xvap, tx);
+ XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) {
+ ZFS_ATTR_SET(zp, ZFS_REPARSE, xoap->xoa_reparse,
+ zp->z_pflags, tx);
+ XVA_SET_RTN(xvap, XAT_REPARSE);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_OFFLINE)) {
+ ZFS_ATTR_SET(zp, ZFS_OFFLINE, xoap->xoa_offline,
+ zp->z_pflags, tx);
+ XVA_SET_RTN(xvap, XAT_OFFLINE);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_SPARSE)) {
+ ZFS_ATTR_SET(zp, ZFS_SPARSE, xoap->xoa_sparse,
+ zp->z_pflags, tx);
+ XVA_SET_RTN(xvap, XAT_SPARSE);
+ }
+}
+
+int
+zfs_zget(zfsvfs_t *zfsvfs, uint64_t obj_num, znode_t **zpp)
+{
+ dmu_object_info_t doi;
+ dmu_buf_t *db;
+ znode_t *zp;
+ int err;
+ sa_handle_t *hdl;
+
+ *zpp = NULL;
+
+ ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num);
+
+ err = sa_buf_hold(zfsvfs->z_os, obj_num, NULL, &db);
+ if (err) {
+ ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+ return (err);
+ }
+
+ 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)))) {
+ sa_buf_rele(db, NULL);
+ ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+ return (EINVAL);
+ }
+
+ hdl = dmu_buf_get_user(db);
+ if (hdl != NULL) {
+ zp = sa_get_userdata(hdl);
+
+
+ /*
+ * Since "SA" does immediate eviction we
+ * should never find a sa handle that doesn't
+ * know about the znode.
+ */
+
+ ASSERT3P(zp, !=, NULL);
+
+ mutex_enter(&zp->z_lock);
+ ASSERT3U(zp->z_id, ==, obj_num);
+ if (zp->z_unlinked) {
+ err = ENOENT;
+ } else {
+ VN_HOLD(ZTOV(zp));
+ *zpp = zp;
+ err = 0;
+ }
+ sa_buf_rele(db, NULL);
+ mutex_exit(&zp->z_lock);
+ ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+ return (err);
+ }
+
+ /*
+ * Not found create new znode/vnode
+ * but only if file exists.
+ *
+ * There is a small window where zfs_vget() could
+ * find this object while a file create is still in
+ * progress. This is checked for in zfs_znode_alloc()
+ *
+ * if zfs_znode_alloc() fails it will drop the hold on the
+ * bonus buffer.
+ */
+ zp = zfs_znode_alloc(zfsvfs, db, doi.doi_data_block_size,
+ doi.doi_bonus_type, NULL);
+ if (zp == NULL) {
+ err = ENOENT;
+ } else {
+ *zpp = zp;
+ }
+ ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+ return (err);
+}
+
+int
+zfs_rezget(znode_t *zp)
+{
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ dmu_object_info_t doi;
+ dmu_buf_t *db;
+ uint64_t obj_num = zp->z_id;
+ uint64_t mode;
+ sa_bulk_attr_t bulk[8];
+ int err;
+ int count = 0;
+ uint64_t gen;
+
+ ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num);
+
+ mutex_enter(&zp->z_acl_lock);
+ if (zp->z_acl_cached) {
+ zfs_acl_free(zp->z_acl_cached);
+ zp->z_acl_cached = NULL;
+ }
+
+ mutex_exit(&zp->z_acl_lock);
+ ASSERT(zp->z_sa_hdl == NULL);
+ err = sa_buf_hold(zfsvfs->z_os, obj_num, NULL, &db);
+ if (err) {
+ ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+ return (err);
+ }
+
+ 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)))) {
+ sa_buf_rele(db, NULL);
+ ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+ return (EINVAL);
+ }
+
+ zfs_znode_sa_init(zfsvfs, zp, db, doi.doi_bonus_type, NULL);
+
+ /* reload cached values */
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL,
+ &gen, sizeof (gen));
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL,
+ &zp->z_size, sizeof (zp->z_size));
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs), NULL,
+ &zp->z_links, sizeof (zp->z_links));
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+ &zp->z_pflags, sizeof (zp->z_pflags));
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
+ &zp->z_atime, sizeof (zp->z_atime));
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
+ &zp->z_uid, sizeof (zp->z_uid));
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL,
+ &zp->z_gid, sizeof (zp->z_gid));
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
+ &mode, sizeof (mode));
+
+ if (sa_bulk_lookup(zp->z_sa_hdl, bulk, count)) {
+ zfs_znode_dmu_fini(zp);
+ ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+ return (EIO);
+ }
+
+ zp->z_mode = mode;
+
+ if (gen != zp->z_gen) {
+ zfs_znode_dmu_fini(zp);
+ ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+ return (EIO);
+ }
+
+ zp->z_unlinked = (zp->z_links == 0);
+ zp->z_blksz = doi.doi_data_block_size;
+
+ ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
+
+ return (0);
+}
+
+void
+zfs_znode_delete(znode_t *zp, dmu_tx_t *tx)
+{
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ objset_t *os = zfsvfs->z_os;
+ uint64_t obj = zp->z_id;
+ uint64_t acl_obj = zfs_external_acl(zp);
+
+ ZFS_OBJ_HOLD_ENTER(zfsvfs, obj);
+ if (acl_obj) {
+ VERIFY(!zp->z_is_sa);
+ VERIFY(0 == dmu_object_free(os, acl_obj, tx));
+ }
+ VERIFY(0 == dmu_object_free(os, obj, tx));
+ zfs_znode_dmu_fini(zp);
+ ZFS_OBJ_HOLD_EXIT(zfsvfs, obj);
+ zfs_znode_free(zp);
+}
+
+void
+zfs_zinactive(znode_t *zp)
+{
+ vnode_t *vp = ZTOV(zp);
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ uint64_t z_id = zp->z_id;
+
+ ASSERT(zp->z_sa_hdl);
+
+ /*
+ * Don't allow a zfs_zget() while were trying to release this znode
+ */
+ ZFS_OBJ_HOLD_ENTER(zfsvfs, z_id);
+
+ mutex_enter(&zp->z_lock);
+ mutex_enter(&vp->v_lock);
+ vp->v_count--;
+ if (vp->v_count > 0 || vn_has_cached_data(vp)) {
+ /*
+ * If the hold count is greater than zero, somebody has
+ * obtained a new reference on this znode while we were
+ * processing it here, so we are done. If we still have
+ * mapped pages then we are also done, since we don't
+ * want to inactivate the znode until the pages get pushed.
+ *
+ * XXX - if vn_has_cached_data(vp) is true, but count == 0,
+ * this seems like it would leave the znode hanging with
+ * no chance to go inactive...
+ */
+ mutex_exit(&vp->v_lock);
+ mutex_exit(&zp->z_lock);
+ ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
+ return;
+ }
+ mutex_exit(&vp->v_lock);
+
+ /*
+ * If this was the last reference to a file with no links,
+ * remove the file from the file system.
+ */
+ if (zp->z_unlinked) {
+ mutex_exit(&zp->z_lock);
+ ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
+ zfs_rmnode(zp);
+ return;
+ }
+
+ mutex_exit(&zp->z_lock);
+ zfs_znode_dmu_fini(zp);
+ ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id);
+ zfs_znode_free(zp);
+}
+
+void
+zfs_znode_free(znode_t *zp)
+{
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+
+ vn_invalid(ZTOV(zp));
+
+ ASSERT(ZTOV(zp)->v_count == 0);
+
+ mutex_enter(&zfsvfs->z_znodes_lock);
+ POINTER_INVALIDATE(&zp->z_zfsvfs);
+ list_remove(&zfsvfs->z_all_znodes, zp);
+ mutex_exit(&zfsvfs->z_znodes_lock);
+
+ if (zp->z_acl_cached) {
+ zfs_acl_free(zp->z_acl_cached);
+ zp->z_acl_cached = NULL;
+ }
+
+ kmem_cache_free(znode_cache, zp);
+
+ VFS_RELE(zfsvfs->z_vfs);
+}
+
+void
+zfs_tstamp_update_setup(znode_t *zp, uint_t flag, uint64_t mtime[2],
+ uint64_t ctime[2], boolean_t have_tx)
+{
+ timestruc_t now;
+
+ gethrestime(&now);
+
+ if (have_tx) { /* will sa_bulk_update happen really soon? */
+ zp->z_atime_dirty = 0;
+ zp->z_seq++;
+ } else {
+ zp->z_atime_dirty = 1;
+ }
+
+ if (flag & AT_ATIME) {
+ ZFS_TIME_ENCODE(&now, zp->z_atime);
+ }
+
+ if (flag & AT_MTIME) {
+ ZFS_TIME_ENCODE(&now, mtime);
+ if (zp->z_zfsvfs->z_use_fuids) {
+ zp->z_pflags |= (ZFS_ARCHIVE |
+ ZFS_AV_MODIFIED);
+ }
+ }
+
+ if (flag & AT_CTIME) {
+ ZFS_TIME_ENCODE(&now, ctime);
+ if (zp->z_zfsvfs->z_use_fuids)
+ zp->z_pflags |= ZFS_ARCHIVE;
+ }
+}
+
+/*
+ * Grow the block size for a file.
+ *
+ * IN: zp - znode of file to free data in.
+ * size - requested block size
+ * tx - open transaction.
+ *
+ * NOTE: this function assumes that the znode is write locked.
+ */
+void
+zfs_grow_blocksize(znode_t *zp, uint64_t size, dmu_tx_t *tx)
+{
+ int error;
+ u_longlong_t dummy;
+
+ if (size <= zp->z_blksz)
+ return;
+ /*
+ * If the file size is already greater than the current blocksize,
+ * we will not grow. If there is more than one block in a file,
+ * the blocksize cannot change.
+ */
+ if (zp->z_blksz && zp->z_size > zp->z_blksz)
+ return;
+
+ error = dmu_object_set_blocksize(zp->z_zfsvfs->z_os, zp->z_id,
+ size, 0, tx);
+
+ if (error == ENOTSUP)
+ return;
+ ASSERT3U(error, ==, 0);
+
+ /* What blocksize did we actually get? */
+ dmu_object_size_from_db(sa_get_db(zp->z_sa_hdl), &zp->z_blksz, &dummy);
+}
+
+/*
+ * 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
+ * a file, the pages being "thrown away* don't need to be written out.
+ */
+/* ARGSUSED */
+static int
+zfs_no_putpage(vnode_t *vp, page_t *pp, u_offset_t *offp, size_t *lenp,
+ int flags, cred_t *cr)
+{
+ ASSERT(0);
+ return (0);
+}
+
+/*
+ * Increase the file length
+ *
+ * IN: zp - znode of file to free data in.
+ * end - new end-of-file
+ *
+ * RETURN: 0 if success
+ * error code if failure
+ */
+static int
+zfs_extend(znode_t *zp, uint64_t end)
+{
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ dmu_tx_t *tx;
+ rl_t *rl;
+ uint64_t newblksz;
+ int error;
+
+ /*
+ * We will change zp_size, lock the whole file.
+ */
+ rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER);
+
+ /*
+ * Nothing to do if file already at desired length.
+ */
+ if (end <= zp->z_size) {
+ zfs_range_unlock(rl);
+ return (0);
+ }
+top:
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ zfs_sa_upgrade_txholds(tx, zp);
+ if (end > zp->z_blksz &&
+ (!ISP2(zp->z_blksz) || zp->z_blksz < zfsvfs->z_max_blksz)) {
+ /*
+ * We are growing the file past the current block size.
+ */
+ if (zp->z_blksz > zp->z_zfsvfs->z_max_blksz) {
+ ASSERT(!ISP2(zp->z_blksz));
+ newblksz = MIN(end, SPA_MAXBLOCKSIZE);
+ } else {
+ newblksz = MIN(end, zp->z_zfsvfs->z_max_blksz);
+ }
+ dmu_tx_hold_write(tx, zp->z_id, 0, newblksz);
+ } else {
+ newblksz = 0;
+ }
+
+ error = dmu_tx_assign(tx, TXG_NOWAIT);
+ if (error) {
+ if (error == ERESTART) {
+ dmu_tx_wait(tx);
+ dmu_tx_abort(tx);
+ goto top;
+ }
+ dmu_tx_abort(tx);
+ zfs_range_unlock(rl);
+ return (error);
+ }
+
+ if (newblksz)
+ zfs_grow_blocksize(zp, newblksz, tx);
+
+ zp->z_size = end;
+
+ VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zp->z_zfsvfs),
+ &zp->z_size, sizeof (zp->z_size), tx));
+
+ zfs_range_unlock(rl);
+
+ dmu_tx_commit(tx);
+
+ return (0);
+}
+
+/*
+ * Free space in a file.
+ *
+ * IN: zp - znode of file to free data in.
+ * off - start of section to free.
+ * len - length of section to free.
+ *
+ * RETURN: 0 if success
+ * error code if failure
+ */
+static int
+zfs_free_range(znode_t *zp, uint64_t off, uint64_t len)
+{
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ rl_t *rl;
+ int error;
+
+ /*
+ * Lock the range being freed.
+ */
+ rl = zfs_range_lock(zp, off, len, RL_WRITER);
+
+ /*
+ * Nothing to do if file already at desired length.
+ */
+ if (off >= zp->z_size) {
+ zfs_range_unlock(rl);
+ return (0);
+ }
+
+ if (off + len > zp->z_size)
+ len = zp->z_size - off;
+
+ error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, off, len);
+
+ zfs_range_unlock(rl);
+
+ return (error);
+}
+
+/*
+ * Truncate a file
+ *
+ * IN: zp - znode of file to free data in.
+ * end - new end-of-file.
+ *
+ * RETURN: 0 if success
+ * error code if failure
+ */
+static int
+zfs_trunc(znode_t *zp, uint64_t end)
+{
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ vnode_t *vp = ZTOV(zp);
+ dmu_tx_t *tx;
+ rl_t *rl;
+ int error;
+ sa_bulk_attr_t bulk[2];
+ int count = 0;
+
+ /*
+ * We will change zp_size, lock the whole file.
+ */
+ rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER);
+
+ /*
+ * Nothing to do if file already at desired length.
+ */
+ if (end >= zp->z_size) {
+ zfs_range_unlock(rl);
+ return (0);
+ }
+
+ error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, end, -1);
+ if (error) {
+ zfs_range_unlock(rl);
+ return (error);
+ }
+top:
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ zfs_sa_upgrade_txholds(tx, zp);
+ error = dmu_tx_assign(tx, TXG_NOWAIT);
+ if (error) {
+ if (error == ERESTART) {
+ dmu_tx_wait(tx);
+ dmu_tx_abort(tx);
+ goto top;
+ }
+ dmu_tx_abort(tx);
+ zfs_range_unlock(rl);
+ return (error);
+ }
+
+ zp->z_size = end;
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs),
+ NULL, &zp->z_size, sizeof (zp->z_size));
+
+ if (end == 0) {
+ zp->z_pflags &= ~ZFS_SPARSE;
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs),
+ NULL, &zp->z_pflags, 8);
+ }
+ VERIFY(sa_bulk_update(zp->z_sa_hdl, bulk, count, tx) == 0);
+
+ dmu_tx_commit(tx);
+
+ /*
+ * Clear any mapped pages in the truncated region. This has to
+ * happen outside of the transaction to avoid the possibility of
+ * a deadlock with someone trying to push a page that we are
+ * about to invalidate.
+ */
+ if (vn_has_cached_data(vp)) {
+ page_t *pp;
+ uint64_t start = end & PAGEMASK;
+ int poff = end & PAGEOFFSET;
+
+ if (poff != 0 && (pp = page_lookup(vp, start, SE_SHARED))) {
+ /*
+ * We need to zero a partial page.
+ */
+ pagezero(pp, poff, PAGESIZE - poff);
+ start += PAGESIZE;
+ page_unlock(pp);
+ }
+ error = pvn_vplist_dirty(vp, start, zfs_no_putpage,
+ B_INVAL | B_TRUNC, NULL);
+ ASSERT(error == 0);
+ }
+
+ zfs_range_unlock(rl);
+
+ return (0);
+}
+
+/*
+ * Free space in a file
+ *
+ * IN: zp - znode of file to free data in.
+ * off - start of range
+ * len - end of range (0 => EOF)
+ * flag - current file open mode flags.
+ * log - TRUE if this action should be logged
+ *
+ * RETURN: 0 if success
+ * error code if failure
+ */
+int
+zfs_freesp(znode_t *zp, uint64_t off, uint64_t len, int flag, boolean_t log)
+{
+ vnode_t *vp = ZTOV(zp);
+ dmu_tx_t *tx;
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ zilog_t *zilog = zfsvfs->z_log;
+ uint64_t mode;
+ uint64_t mtime[2], ctime[2];
+ sa_bulk_attr_t bulk[3];
+ int count = 0;
+ int error;
+
+ if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_MODE(zfsvfs), &mode,
+ sizeof (mode))) != 0)
+ return (error);
+
+ if (off > zp->z_size) {
+ error = zfs_extend(zp, off+len);
+ if (error == 0 && log)
+ goto log;
+ else
+ return (error);
+ }
+
+ /*
+ * Check for any locks in the region to be freed.
+ */
+
+ if (MANDLOCK(vp, (mode_t)mode)) {
+ uint64_t length = (len ? len : zp->z_size - off);
+ if (error = chklock(vp, FWRITE, off, length, flag, NULL))
+ return (error);
+ }
+
+ if (len == 0) {
+ error = zfs_trunc(zp, off);
+ } else {
+ if ((error = zfs_free_range(zp, off, len)) == 0 &&
+ off + len > zp->z_size)
+ error = zfs_extend(zp, off+len);
+ }
+ if (error || !log)
+ return (error);
+log:
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ zfs_sa_upgrade_txholds(tx, zp);
+ error = dmu_tx_assign(tx, TXG_NOWAIT);
+ if (error) {
+ if (error == ERESTART) {
+ dmu_tx_wait(tx);
+ dmu_tx_abort(tx);
+ goto log;
+ }
+ dmu_tx_abort(tx);
+ return (error);
+ }
+
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, mtime, 16);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, ctime, 16);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs),
+ NULL, &zp->z_pflags, 8);
+ zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime, B_TRUE);
+ error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
+ ASSERT(error == 0);
+
+ zfs_log_truncate(zilog, tx, TX_TRUNCATE, zp, off, len);
+
+ dmu_tx_commit(tx);
+ return (0);
+}
+
+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;
+ int i;
+ znode_t *rootzp = NULL;
+ vnode_t *vp;
+ vattr_t vattr;
+ znode_t *zp;
+ zfs_acl_ids_t acl_ids;
+
+ /*
+ * First attempt to create master node.
+ */
+ /*
+ * In an empty objset, there are no blocks to read and thus
+ * there can be no i/o errors (which we assert below).
+ */
+ moid = MASTER_NODE_OBJ;
+ error = zap_create_claim(os, moid, DMU_OT_MASTER_NODE,
+ DMU_OT_NONE, 0, tx);
+ ASSERT(error == 0);
+
+ /*
+ * Set starting attributes.
+ */
+ version = zfs_zpl_version_map(spa_version(dmu_objset_spa(os)));
+ elem = NULL;
+ while ((elem = nvlist_next_nvpair(zplprops, elem)) != NULL) {
+ /* For the moment we expect all zpl props to be uint64_ts */
+ uint64_t val;
+ char *name;
+
+ ASSERT(nvpair_type(elem) == DATA_TYPE_UINT64);
+ VERIFY(nvpair_value_uint64(elem, &val) == 0);
+ name = nvpair_name(elem);
+ if (strcmp(name, zfs_prop_to_name(ZFS_PROP_VERSION)) == 0) {
+ if (val < version)
+ version = val;
+ } else {
+ error = zap_update(os, moid, name, 8, 1, &val, tx);
+ }
+ ASSERT(error == 0);
+ if (strcmp(name, zfs_prop_to_name(ZFS_PROP_NORMALIZE)) == 0)
+ norm = val;
+ else if (strcmp(name, zfs_prop_to_name(ZFS_PROP_CASE)) == 0)
+ sense = val;
+ }
+ ASSERT(version != 0);
+ error = zap_update(os, moid, ZPL_VERSION_STR, 8, 1, &version, tx);
+
+ /*
+ * Create zap object used for SA attribute registration
+ */
+
+ if (version >= ZPL_VERSION_SA) {
+ sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE,
+ DMU_OT_NONE, 0, tx);
+ error = zap_add(os, moid, ZFS_SA_ATTRS, 8, 1, &sa_obj, tx);
+ ASSERT(error == 0);
+ } else {
+ sa_obj = 0;
+ }
+ /*
+ * Create a delete queue.
+ */
+ obj = zap_create(os, DMU_OT_UNLINKED_SET, DMU_OT_NONE, 0, tx);
+
+ error = zap_add(os, moid, ZFS_UNLINKED_SET, 8, 1, &obj, tx);
+ ASSERT(error == 0);
+
+ /*
+ * Create root znode. Create minimal znode/vnode/zfsvfs
+ * to allow zfs_mknode to work.
+ */
+ vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
+ vattr.va_type = VDIR;
+ vattr.va_mode = S_IFDIR|0755;
+ vattr.va_uid = crgetuid(cr);
+ vattr.va_gid = crgetgid(cr);
+
+ rootzp = kmem_cache_alloc(znode_cache, KM_SLEEP);
+ ASSERT(!POINTER_IS_VALID(rootzp->z_zfsvfs));
+ rootzp->z_moved = 0;
+ rootzp->z_unlinked = 0;
+ rootzp->z_atime_dirty = 0;
+ rootzp->z_is_sa = USE_SA(version, os);
+
+ vp = ZTOV(rootzp);
+ vn_reinit(vp);
+ vp->v_type = VDIR;
+
+ bzero(&zfsvfs, sizeof (zfsvfs_t));
+
+ zfsvfs.z_os = os;
+ zfsvfs.z_parent = &zfsvfs;
+ zfsvfs.z_version = version;
+ zfsvfs.z_use_fuids = USE_FUIDS(version, os);
+ zfsvfs.z_use_sa = USE_SA(version, os);
+ zfsvfs.z_norm = norm;
+
+ error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END,
+ &zfsvfs.z_attr_table);
+
+ ASSERT(error == 0);
+
+ /*
+ * Fold case on file systems that are always or sometimes case
+ * insensitive.
+ */
+ if (sense == ZFS_CASE_INSENSITIVE || sense == ZFS_CASE_MIXED)
+ zfsvfs.z_norm |= U8_TEXTPREP_TOUPPER;
+
+ 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));
+
+ for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
+ mutex_init(&zfsvfs.z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL);
+
+ rootzp->z_zfsvfs = &zfsvfs;
+ VERIFY(0 == zfs_acl_ids_create(rootzp, IS_ROOT_NODE, &vattr,
+ cr, NULL, &acl_ids));
+ zfs_mknode(rootzp, &vattr, tx, cr, IS_ROOT_NODE, &zp, &acl_ids);
+ ASSERT3P(zp, ==, rootzp);
+ ASSERT(!vn_in_dnlc(ZTOV(rootzp))); /* not valid to move */
+ error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &rootzp->z_id, tx);
+ ASSERT(error == 0);
+ zfs_acl_ids_free(&acl_ids);
+ POINTER_INVALIDATE(&rootzp->z_zfsvfs);
+
+ ZTOV(rootzp)->v_count = 0;
+ sa_handle_destroy(rootzp->z_sa_hdl);
+ kmem_cache_free(znode_cache, rootzp);
+
+ /*
+ * Create shares directory
+ */
+
+ error = zfs_create_share_dir(&zfsvfs, tx);
+
+ ASSERT(error == 0);
+
+ for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
+ mutex_destroy(&zfsvfs.z_hold_mtx[i]);
+}
+
+#endif /* _KERNEL */
+
+static int
+zfs_sa_setup(objset_t *osp, sa_attr_type_t **sa_table)
+{
+ uint64_t sa_obj = 0;
+ int error;
+
+ error = zap_lookup(osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1, &sa_obj);
+ if (error != 0 && error != ENOENT)
+ return (error);
+
+ error = sa_setup(osp, sa_obj, zfs_attr_table, ZPL_END, sa_table);
+ return (error);
+}
+
+static int
+zfs_grab_sa_handle(objset_t *osp, uint64_t obj, sa_handle_t **hdlp,
+ dmu_buf_t **db, void *tag)
+{
+ dmu_object_info_t doi;
+ int error;
+
+ if ((error = sa_buf_hold(osp, obj, tag, db)) != 0)
+ return (error);
+
+ 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)) {
+ sa_buf_rele(*db, tag);
+ return (ENOTSUP);
+ }
+
+ error = sa_handle_get(osp, obj, NULL, SA_HDL_PRIVATE, hdlp);
+ if (error != 0) {
+ sa_buf_rele(*db, tag);
+ return (error);
+ }
+
+ return (0);
+}
+
+void
+zfs_release_sa_handle(sa_handle_t *hdl, dmu_buf_t *db, void *tag)
+{
+ sa_handle_destroy(hdl);
+ sa_buf_rele(db, tag);
+}
+
+/*
+ * Given an object number, return its parent object number and whether
+ * or not the object is an extended attribute directory.
+ */
+static int
+zfs_obj_to_pobj(sa_handle_t *hdl, sa_attr_type_t *sa_table, uint64_t *pobjp,
+ int *is_xattrdir)
+{
+ uint64_t parent;
+ uint64_t pflags;
+ uint64_t mode;
+ sa_bulk_attr_t bulk[3];
+ int count = 0;
+ int error;
+
+ SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_PARENT], NULL,
+ &parent, sizeof (parent));
+ SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_FLAGS], NULL,
+ &pflags, sizeof (pflags));
+ SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_MODE], NULL,
+ &mode, sizeof (mode));
+
+ if ((error = sa_bulk_lookup(hdl, bulk, count)) != 0)
+ return (error);
+
+ *pobjp = parent;
+ *is_xattrdir = ((pflags & ZFS_XATTR) != 0) && S_ISDIR(mode);
+
+ return (0);
+}
+
+/*
+ * Given an object number, return some zpl level statistics
+ */
+static int
+zfs_obj_to_stats_impl(sa_handle_t *hdl, sa_attr_type_t *sa_table,
+ zfs_stat_t *sb)
+{
+ sa_bulk_attr_t bulk[4];
+ int count = 0;
+
+ SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_MODE], NULL,
+ &sb->zs_mode, sizeof (sb->zs_mode));
+ SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_GEN], NULL,
+ &sb->zs_gen, sizeof (sb->zs_gen));
+ SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_LINKS], NULL,
+ &sb->zs_links, sizeof (sb->zs_links));
+ SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_CTIME], NULL,
+ &sb->zs_ctime, sizeof (sb->zs_ctime));
+
+ return (sa_bulk_lookup(hdl, bulk, count));
+}
+
+static int
+zfs_obj_to_path_impl(objset_t *osp, uint64_t obj, sa_handle_t *hdl,
+ sa_attr_type_t *sa_table, char *buf, int len)
+{
+ sa_handle_t *sa_hdl;
+ sa_handle_t *prevhdl = NULL;
+ dmu_buf_t *prevdb = NULL;
+ dmu_buf_t *sa_db = NULL;
+ char *path = buf + len - 1;
+ int error;
+
+ *path = '\0';
+ sa_hdl = hdl;
+
+ for (;;) {
+ uint64_t pobj;
+ char component[MAXNAMELEN + 2];
+ size_t complen;
+ int is_xattrdir;
+
+ if (prevdb)
+ zfs_release_sa_handle(prevhdl, prevdb, FTAG);
+
+ if ((error = zfs_obj_to_pobj(sa_hdl, sa_table, &pobj,
+ &is_xattrdir)) != 0)
+ break;
+
+ if (pobj == obj) {
+ if (path[0] != '/')
+ *--path = '/';
+ break;
+ }
+
+ component[0] = '/';
+ if (is_xattrdir) {
+ (void) sprintf(component + 1, "<xattrdir>");
+ } else {
+ error = zap_value_search(osp, pobj, obj,
+ ZFS_DIRENT_OBJ(-1ULL), component + 1);
+ if (error != 0)
+ break;
+ }
+
+ complen = strlen(component);
+ path -= complen;
+ ASSERT(path >= buf);
+ bcopy(component, path, complen);
+ obj = pobj;
+
+ if (sa_hdl != hdl) {
+ prevhdl = sa_hdl;
+ prevdb = sa_db;
+ }
+ error = zfs_grab_sa_handle(osp, obj, &sa_hdl, &sa_db, FTAG);
+ if (error != 0) {
+ sa_hdl = prevhdl;
+ sa_db = prevdb;
+ break;
+ }
+ }
+
+ if (sa_hdl != NULL && sa_hdl != hdl) {
+ ASSERT(sa_db != NULL);
+ zfs_release_sa_handle(sa_hdl, sa_db, FTAG);
+ }
+
+ if (error == 0)
+ (void) memmove(buf, path, buf + len - path);
+
+ return (error);
+}
+
+int
+zfs_obj_to_path(objset_t *osp, uint64_t obj, char *buf, int len)
+{
+ sa_attr_type_t *sa_table;
+ sa_handle_t *hdl;
+ dmu_buf_t *db;
+ int error;
+
+ error = zfs_sa_setup(osp, &sa_table);
+ if (error != 0)
+ return (error);
+
+ error = zfs_grab_sa_handle(osp, obj, &hdl, &db, FTAG);
+ if (error != 0)
+ return (error);
+
+ error = zfs_obj_to_path_impl(osp, obj, hdl, sa_table, buf, len);
+
+ zfs_release_sa_handle(hdl, db, FTAG);
+ return (error);
+}
+
+int
+zfs_obj_to_stats(objset_t *osp, uint64_t obj, zfs_stat_t *sb,
+ char *buf, int len)
+{
+ char *path = buf + len - 1;
+ sa_attr_type_t *sa_table;
+ sa_handle_t *hdl;
+ dmu_buf_t *db;
+ int error;
+
+ *path = '\0';
+
+ error = zfs_sa_setup(osp, &sa_table);
+ if (error != 0)
+ return (error);
+
+ error = zfs_grab_sa_handle(osp, obj, &hdl, &db, FTAG);
+ if (error != 0)
+ return (error);
+
+ error = zfs_obj_to_stats_impl(hdl, sa_table, sb);
+ if (error != 0) {
+ zfs_release_sa_handle(hdl, db, FTAG);
+ return (error);
+ }
+
+ error = zfs_obj_to_path_impl(osp, obj, hdl, sa_table, buf, len);
+
+ zfs_release_sa_handle(hdl, db, FTAG);
+ return (error);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-11 22:16:16 +0000