5649246dd3
Unlike Solaris the Linux implementation embeds the inode in the znode, and has no use for a vnode. So while it's true that fragmention of the znode cache may occur it should not be worse than any of the other Linux FS inode caches. Until proven that this is a problem it's just added complexity we don't need.
1988 lines
48 KiB
C
1988 lines
48 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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*/
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/* Portions Copyright 2007 Jeremy Teo */
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#ifdef _KERNEL
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/systm.h>
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#include <sys/sysmacros.h>
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#include <sys/resource.h>
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#include <sys/mntent.h>
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#include <sys/mkdev.h>
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#include <sys/u8_textprep.h>
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#include <sys/dsl_dataset.h>
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#include <sys/vfs.h>
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#include <sys/vfs_opreg.h>
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#include <sys/vnode.h>
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#include <sys/file.h>
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#include <sys/kmem.h>
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#include <sys/errno.h>
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#include <sys/unistd.h>
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#include <sys/mode.h>
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#include <sys/atomic.h>
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#include <vm/pvn.h>
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#include "fs/fs_subr.h"
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#include <sys/zfs_dir.h>
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#include <sys/zfs_acl.h>
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#include <sys/zfs_ioctl.h>
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#include <sys/zfs_rlock.h>
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#include <sys/zfs_fuid.h>
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#include <sys/dnode.h>
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#include <sys/fs/zfs.h>
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#include <sys/kidmap.h>
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#endif /* _KERNEL */
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#include <sys/dmu.h>
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#include <sys/refcount.h>
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#include <sys/stat.h>
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#include <sys/zap.h>
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#include <sys/zfs_znode.h>
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#include <sys/sa.h>
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#include <sys/zfs_sa.h>
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#include <sys/zfs_stat.h>
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#include "zfs_prop.h"
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#include "zfs_comutil.h"
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/*
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* Define ZNODE_STATS to turn on statistic gathering. By default, it is only
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* turned on when DEBUG is also defined.
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*/
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#ifdef DEBUG
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#define ZNODE_STATS
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#endif /* DEBUG */
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#ifdef ZNODE_STATS
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#define ZNODE_STAT_ADD(stat) ((stat)++)
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#else
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#define ZNODE_STAT_ADD(stat) /* nothing */
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#endif /* ZNODE_STATS */
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/*
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* Functions needed for userland (ie: libzpool) are not put under
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* #ifdef_KERNEL; the rest of the functions have dependencies
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* (such as VFS logic) that will not compile easily in userland.
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*/
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#ifdef _KERNEL
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#ifdef HAVE_ZPL
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/*
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* Needed to close a small window in zfs_znode_move() that allows the zfsvfs to
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* be freed before it can be safely accessed.
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*/
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krwlock_t zfsvfs_lock;
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static kmem_cache_t *znode_cache = NULL;
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/*ARGSUSED*/
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static void
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znode_evict_error(dmu_buf_t *dbuf, void *user_ptr)
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{
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/*
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* We should never drop all dbuf refs without first clearing
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* the eviction callback.
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*/
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panic("evicting znode %p\n", user_ptr);
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}
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/*ARGSUSED*/
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static int
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zfs_znode_cache_constructor(void *buf, void *arg, int kmflags)
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{
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znode_t *zp = buf;
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ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
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zp->z_vnode = vn_alloc(kmflags);
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if (zp->z_vnode == NULL) {
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return (-1);
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}
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ZTOV(zp)->v_data = zp;
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list_link_init(&zp->z_link_node);
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mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL);
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rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL);
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rw_init(&zp->z_name_lock, NULL, RW_DEFAULT, NULL);
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mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL);
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mutex_init(&zp->z_range_lock, NULL, MUTEX_DEFAULT, NULL);
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avl_create(&zp->z_range_avl, zfs_range_compare,
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sizeof (rl_t), offsetof(rl_t, r_node));
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zp->z_dirlocks = NULL;
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zp->z_acl_cached = NULL;
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zp->z_moved = 0;
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return (0);
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}
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/*ARGSUSED*/
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static void
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zfs_znode_cache_destructor(void *buf, void *arg)
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{
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znode_t *zp = buf;
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ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
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ASSERT(ZTOV(zp)->v_data == zp);
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vn_free(ZTOV(zp));
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ASSERT(!list_link_active(&zp->z_link_node));
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mutex_destroy(&zp->z_lock);
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rw_destroy(&zp->z_parent_lock);
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rw_destroy(&zp->z_name_lock);
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mutex_destroy(&zp->z_acl_lock);
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avl_destroy(&zp->z_range_avl);
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mutex_destroy(&zp->z_range_lock);
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ASSERT(zp->z_dirlocks == NULL);
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ASSERT(zp->z_acl_cached == NULL);
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}
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void
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zfs_znode_init(void)
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{
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/*
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* Initialize zcache
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*/
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rw_init(&zfsvfs_lock, NULL, RW_DEFAULT, NULL);
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ASSERT(znode_cache == NULL);
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znode_cache = kmem_cache_create("zfs_znode_cache",
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sizeof (znode_t), 0, zfs_znode_cache_constructor,
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zfs_znode_cache_destructor, NULL, NULL, NULL, 0);
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}
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void
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zfs_znode_fini(void)
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{
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/*
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* Cleanup vfs & vnode ops
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*/
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zfs_remove_op_tables();
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/*
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* Cleanup zcache
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*/
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if (znode_cache)
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kmem_cache_destroy(znode_cache);
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znode_cache = NULL;
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rw_destroy(&zfsvfs_lock);
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}
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struct vnodeops *zfs_dvnodeops;
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struct vnodeops *zfs_fvnodeops;
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struct vnodeops *zfs_symvnodeops;
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struct vnodeops *zfs_xdvnodeops;
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struct vnodeops *zfs_evnodeops;
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struct vnodeops *zfs_sharevnodeops;
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void
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zfs_remove_op_tables()
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{
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/*
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* Remove vfs ops
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*/
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ASSERT(zfsfstype);
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(void) vfs_freevfsops_by_type(zfsfstype);
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zfsfstype = 0;
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/*
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* Remove vnode ops
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*/
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if (zfs_dvnodeops)
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vn_freevnodeops(zfs_dvnodeops);
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if (zfs_fvnodeops)
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vn_freevnodeops(zfs_fvnodeops);
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if (zfs_symvnodeops)
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vn_freevnodeops(zfs_symvnodeops);
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if (zfs_xdvnodeops)
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vn_freevnodeops(zfs_xdvnodeops);
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if (zfs_evnodeops)
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vn_freevnodeops(zfs_evnodeops);
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if (zfs_sharevnodeops)
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vn_freevnodeops(zfs_sharevnodeops);
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zfs_dvnodeops = NULL;
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zfs_fvnodeops = NULL;
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zfs_symvnodeops = NULL;
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zfs_xdvnodeops = NULL;
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zfs_evnodeops = NULL;
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zfs_sharevnodeops = NULL;
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}
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extern const fs_operation_def_t zfs_dvnodeops_template[];
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extern const fs_operation_def_t zfs_fvnodeops_template[];
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extern const fs_operation_def_t zfs_xdvnodeops_template[];
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extern const fs_operation_def_t zfs_symvnodeops_template[];
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extern const fs_operation_def_t zfs_evnodeops_template[];
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extern const fs_operation_def_t zfs_sharevnodeops_template[];
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int
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zfs_create_op_tables()
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{
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int error;
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/*
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* zfs_dvnodeops can be set if mod_remove() calls mod_installfs()
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* due to a failure to remove the the 2nd modlinkage (zfs_modldrv).
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* In this case we just return as the ops vectors are already set up.
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*/
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if (zfs_dvnodeops)
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return (0);
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error = vn_make_ops(MNTTYPE_ZFS, zfs_dvnodeops_template,
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&zfs_dvnodeops);
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if (error)
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return (error);
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error = vn_make_ops(MNTTYPE_ZFS, zfs_fvnodeops_template,
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&zfs_fvnodeops);
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if (error)
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return (error);
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error = vn_make_ops(MNTTYPE_ZFS, zfs_symvnodeops_template,
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&zfs_symvnodeops);
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if (error)
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return (error);
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error = vn_make_ops(MNTTYPE_ZFS, zfs_xdvnodeops_template,
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&zfs_xdvnodeops);
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if (error)
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return (error);
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error = vn_make_ops(MNTTYPE_ZFS, zfs_evnodeops_template,
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&zfs_evnodeops);
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if (error)
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return (error);
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error = vn_make_ops(MNTTYPE_ZFS, zfs_sharevnodeops_template,
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&zfs_sharevnodeops);
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return (error);
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}
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int
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zfs_create_share_dir(zfsvfs_t *zfsvfs, dmu_tx_t *tx)
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{
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zfs_acl_ids_t acl_ids;
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vattr_t vattr;
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znode_t *sharezp;
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vnode_t *vp;
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znode_t *zp;
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int error;
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vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
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vattr.va_type = VDIR;
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vattr.va_mode = S_IFDIR|0555;
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vattr.va_uid = crgetuid(kcred);
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vattr.va_gid = crgetgid(kcred);
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sharezp = kmem_cache_alloc(znode_cache, KM_SLEEP);
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ASSERT(!POINTER_IS_VALID(sharezp->z_zfsvfs));
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sharezp->z_moved = 0;
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sharezp->z_unlinked = 0;
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sharezp->z_atime_dirty = 0;
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sharezp->z_zfsvfs = zfsvfs;
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sharezp->z_is_sa = zfsvfs->z_use_sa;
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vp = ZTOV(sharezp);
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vn_reinit(vp);
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vp->v_type = VDIR;
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VERIFY(0 == zfs_acl_ids_create(sharezp, IS_ROOT_NODE, &vattr,
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kcred, NULL, &acl_ids));
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zfs_mknode(sharezp, &vattr, tx, kcred, IS_ROOT_NODE, &zp, &acl_ids);
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ASSERT3P(zp, ==, sharezp);
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ASSERT(!vn_in_dnlc(ZTOV(sharezp))); /* not valid to move */
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POINTER_INVALIDATE(&sharezp->z_zfsvfs);
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error = zap_add(zfsvfs->z_os, MASTER_NODE_OBJ,
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ZFS_SHARES_DIR, 8, 1, &sharezp->z_id, tx);
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zfsvfs->z_shares_dir = sharezp->z_id;
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zfs_acl_ids_free(&acl_ids);
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ZTOV(sharezp)->v_count = 0;
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sa_handle_destroy(sharezp->z_sa_hdl);
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kmem_cache_free(znode_cache, sharezp);
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return (error);
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}
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/*
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* define a couple of values we need available
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* for both 64 and 32 bit environments.
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*/
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#ifndef NBITSMINOR64
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#define NBITSMINOR64 32
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#endif
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#ifndef MAXMAJ64
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#define MAXMAJ64 0xffffffffUL
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#endif
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#ifndef MAXMIN64
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#define MAXMIN64 0xffffffffUL
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#endif
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/*
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* Create special expldev for ZFS private use.
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* Can't use standard expldev since it doesn't do
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* what we want. The standard expldev() takes a
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* dev32_t in LP64 and expands it to a long dev_t.
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* We need an interface that takes a dev32_t in ILP32
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* and expands it to a long dev_t.
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*/
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static uint64_t
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zfs_expldev(dev_t dev)
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{
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#ifndef _LP64
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major_t major = (major_t)dev >> NBITSMINOR32 & MAXMAJ32;
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return (((uint64_t)major << NBITSMINOR64) |
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((minor_t)dev & MAXMIN32));
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#else
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return (dev);
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#endif
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}
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/*
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* Special cmpldev for ZFS private use.
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* Can't use standard cmpldev since it takes
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* a long dev_t and compresses it to dev32_t in
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* LP64. We need to do a compaction of a long dev_t
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* to a dev32_t in ILP32.
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*/
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dev_t
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zfs_cmpldev(uint64_t dev)
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{
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#ifndef _LP64
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minor_t minor = (minor_t)dev & MAXMIN64;
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major_t major = (major_t)(dev >> NBITSMINOR64) & MAXMAJ64;
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if (major > MAXMAJ32 || minor > MAXMIN32)
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return (NODEV32);
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return (((dev32_t)major << NBITSMINOR32) | minor);
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#else
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return (dev);
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#endif
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}
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static void
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zfs_znode_sa_init(zfsvfs_t *zfsvfs, znode_t *zp,
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dmu_buf_t *db, dmu_object_type_t obj_type, sa_handle_t *sa_hdl)
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{
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ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs) || (zfsvfs == zp->z_zfsvfs));
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ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zfsvfs, zp->z_id)));
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mutex_enter(&zp->z_lock);
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ASSERT(zp->z_sa_hdl == NULL);
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ASSERT(zp->z_acl_cached == NULL);
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if (sa_hdl == NULL) {
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VERIFY(0 == sa_handle_get_from_db(zfsvfs->z_os, db, zp,
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SA_HDL_SHARED, &zp->z_sa_hdl));
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} else {
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zp->z_sa_hdl = sa_hdl;
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sa_set_userp(sa_hdl, zp);
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}
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zp->z_is_sa = (obj_type == DMU_OT_SA) ? B_TRUE : B_FALSE;
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/*
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* Slap on VROOT if we are the root znode
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*/
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if (zp->z_id == zfsvfs->z_root)
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ZTOV(zp)->v_flag |= VROOT;
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mutex_exit(&zp->z_lock);
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vn_exists(ZTOV(zp));
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}
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void
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zfs_znode_dmu_fini(znode_t *zp)
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{
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ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zp->z_zfsvfs, zp->z_id)) ||
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zp->z_unlinked ||
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RW_WRITE_HELD(&zp->z_zfsvfs->z_teardown_inactive_lock));
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sa_handle_destroy(zp->z_sa_hdl);
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zp->z_sa_hdl = NULL;
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}
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/*
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* Construct a new znode/vnode and intialize.
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*
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* This does not do a call to dmu_set_user() that is
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* up to the caller to do, in case you don't want to
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* return the znode
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*/
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static znode_t *
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zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz,
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dmu_object_type_t obj_type, sa_handle_t *hdl)
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{
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znode_t *zp;
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vnode_t *vp;
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uint64_t mode;
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uint64_t parent;
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sa_bulk_attr_t bulk[9];
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int count = 0;
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zp = kmem_cache_alloc(znode_cache, KM_SLEEP);
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ASSERT(zp->z_dirlocks == NULL);
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ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs));
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zp->z_moved = 0;
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/*
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* Defer setting z_zfsvfs until the znode is ready to be a candidate for
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* the zfs_znode_move() callback.
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*/
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zp->z_sa_hdl = NULL;
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zp->z_unlinked = 0;
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zp->z_atime_dirty = 0;
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zp->z_mapcnt = 0;
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zp->z_id = db->db_object;
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zp->z_blksz = blksz;
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zp->z_seq = 0x7A4653;
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zp->z_sync_cnt = 0;
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vp = ZTOV(zp);
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vn_reinit(vp);
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zfs_znode_sa_init(zfsvfs, zp, db, obj_type, hdl);
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SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
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SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL, &zp->z_gen, 8);
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SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL,
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&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;
|
|
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
|
|
*/
|
|
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),
|
|
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);
|
|
ASSERT3S(err, ==, 0);
|
|
}
|
|
kmem_free(sa_attrs, sizeof(sa_bulk_attr_t) * ZPL_END);
|
|
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),
|
|
×, 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);
|
|
}
|
|
#endif /* HAVE_ZPL */
|
|
|
|
void
|
|
zfs_create_fs(objset_t *os, cred_t *cr, nvlist_t *zplprops, dmu_tx_t *tx)
|
|
{
|
|
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.
|
|
*/
|
|
/*
|
|
* 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);
|
|
|
|
#ifdef HAVE_ZPL
|
|
/*
|
|
* 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;
|
|
|
|
/* 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));
|
|
|
|
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);
|
|
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 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);
|
|
|
|
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);
|
|
|
|
dmu_buf_rele(db, FTAG);
|
|
#endif /* HAVE_ZPL */
|
|
}
|
|
|
|
#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)
|
|
{
|
|
dmu_object_info_t doi;
|
|
int error;
|
|
|
|
if ((error = sa_buf_hold(osp, obj, FTAG, 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, FTAG);
|
|
return (ENOTSUP);
|
|
}
|
|
|
|
error = sa_handle_get(osp, obj, NULL, SA_HDL_PRIVATE, hdlp);
|
|
if (error != 0) {
|
|
sa_buf_rele(*db, FTAG);
|
|
return (error);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
zfs_release_sa_handle(sa_handle_t *hdl, dmu_buf_t *db)
|
|
{
|
|
sa_handle_destroy(hdl);
|
|
sa_buf_rele(db, FTAG);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
|
|
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);
|
|
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);
|
|
}
|
|
|
|
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);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
error = zfs_obj_to_path_impl(osp, obj, hdl, sa_table, buf, len);
|
|
|
|
zfs_release_sa_handle(hdl, db);
|
|
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);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
error = zfs_obj_to_stats_impl(hdl, sa_table, sb);
|
|
if (error != 0) {
|
|
zfs_release_sa_handle(hdl, db);
|
|
return (error);
|
|
}
|
|
|
|
error = zfs_obj_to_path_impl(osp, obj, hdl, sa_table, buf, len);
|
|
|
|
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
|