| /* |
| * 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. |
| * Copyright (c) 2012, 2014 by Delphix. All rights reserved. |
| * Copyright (c) 2014 Integros [integros.com] |
| */ |
| |
| /* Portions Copyright 2007 Jeremy Teo */ |
| /* Portions Copyright 2011 Martin Matuska <mm@FreeBSD.org> */ |
| |
| #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/u8_textprep.h> |
| #include <sys/dsl_dataset.h> |
| #include <sys/vfs.h> |
| #include <sys/vnode.h> |
| #include <sys/file.h> |
| #include <sys/kmem.h> |
| #include <sys/errno.h> |
| #include <sys/unistd.h> |
| #include <sys/atomic.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> |
| #endif /* _KERNEL */ |
| |
| #include <sys/dmu.h> |
| #include <sys/dmu_objset.h> |
| #include <sys/dmu_tx.h> |
| #include <sys/zfs_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" |
| |
| /* Used by fstat(1). */ |
| SYSCTL_INT(_debug_sizeof, OID_AUTO, znode, CTLFLAG_RD, |
| SYSCTL_NULL_INT_PTR, sizeof (znode_t), "sizeof(znode_t)"); |
| |
| /* |
| * Define ZNODE_STATS to turn on statistic gathering. By default, it is only |
| * turned on when DEBUG is also defined. |
| */ |
| #ifdef ZFS_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 |
| #if !defined(KMEM_DEBUG) && __FreeBSD_version >= 1300102 |
| #define _ZFS_USE_SMR |
| static uma_zone_t znode_uma_zone; |
| #else |
| static kmem_cache_t *znode_cache = NULL; |
| #endif |
| |
| extern struct vop_vector zfs_vnodeops; |
| extern struct vop_vector zfs_fifoops; |
| extern struct vop_vector zfs_shareops; |
| |
| |
| /* |
| * This callback is invoked when acquiring a RL_WRITER or RL_APPEND lock on |
| * z_rangelock. It will modify the offset and length of the lock to reflect |
| * znode-specific information, and convert RL_APPEND to RL_WRITER. This is |
| * called with the rangelock_t's rl_lock held, which avoids races. |
| */ |
| static void |
| zfs_rangelock_cb(zfs_locked_range_t *new, void *arg) |
| { |
| znode_t *zp = arg; |
| |
| /* |
| * If in append mode, convert to writer and lock starting at the |
| * current end of file. |
| */ |
| if (new->lr_type == RL_APPEND) { |
| new->lr_offset = zp->z_size; |
| new->lr_type = RL_WRITER; |
| } |
| |
| /* |
| * If we need to grow the block size then lock the whole file range. |
| */ |
| uint64_t end_size = MAX(zp->z_size, new->lr_offset + new->lr_length); |
| if (end_size > zp->z_blksz && (!ISP2(zp->z_blksz) || |
| zp->z_blksz < ZTOZSB(zp)->z_max_blksz)) { |
| new->lr_offset = 0; |
| new->lr_length = UINT64_MAX; |
| } |
| } |
| |
| static int |
| zfs_znode_cache_constructor(void *buf, void *arg, int kmflags) |
| { |
| znode_t *zp = buf; |
| |
| POINTER_INVALIDATE(&zp->z_zfsvfs); |
| |
| list_link_init(&zp->z_link_node); |
| |
| mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL); |
| mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL); |
| rw_init(&zp->z_xattr_lock, NULL, RW_DEFAULT, NULL); |
| |
| zfs_rangelock_init(&zp->z_rangelock, zfs_rangelock_cb, zp); |
| |
| zp->z_acl_cached = NULL; |
| zp->z_xattr_cached = NULL; |
| zp->z_xattr_parent = 0; |
| zp->z_vnode = NULL; |
| zp->z_sync_writes_cnt = 0; |
| zp->z_async_writes_cnt = 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)); |
| ASSERT3P(zp->z_vnode, ==, NULL); |
| ASSERT(!list_link_active(&zp->z_link_node)); |
| mutex_destroy(&zp->z_lock); |
| mutex_destroy(&zp->z_acl_lock); |
| rw_destroy(&zp->z_xattr_lock); |
| zfs_rangelock_fini(&zp->z_rangelock); |
| |
| ASSERT3P(zp->z_acl_cached, ==, NULL); |
| ASSERT3P(zp->z_xattr_cached, ==, NULL); |
| |
| ASSERT0(atomic_load_32(&zp->z_sync_writes_cnt)); |
| ASSERT0(atomic_load_32(&zp->z_async_writes_cnt)); |
| } |
| |
| |
| #ifdef _ZFS_USE_SMR |
| VFS_SMR_DECLARE; |
| |
| static int |
| zfs_znode_cache_constructor_smr(void *mem, int size __unused, void *private, |
| int flags) |
| { |
| |
| return (zfs_znode_cache_constructor(mem, private, flags)); |
| } |
| |
| static void |
| zfs_znode_cache_destructor_smr(void *mem, int size __unused, void *private) |
| { |
| |
| zfs_znode_cache_destructor(mem, private); |
| } |
| |
| void |
| zfs_znode_init(void) |
| { |
| /* |
| * Initialize zcache |
| */ |
| ASSERT3P(znode_uma_zone, ==, NULL); |
| znode_uma_zone = uma_zcreate("zfs_znode_cache", |
| sizeof (znode_t), zfs_znode_cache_constructor_smr, |
| zfs_znode_cache_destructor_smr, NULL, NULL, 0, 0); |
| VFS_SMR_ZONE_SET(znode_uma_zone); |
| } |
| |
| static znode_t * |
| zfs_znode_alloc_kmem(int flags) |
| { |
| |
| return (uma_zalloc_smr(znode_uma_zone, flags)); |
| } |
| |
| static void |
| zfs_znode_free_kmem(znode_t *zp) |
| { |
| if (zp->z_xattr_cached) { |
| nvlist_free(zp->z_xattr_cached); |
| zp->z_xattr_cached = NULL; |
| } |
| uma_zfree_smr(znode_uma_zone, zp); |
| } |
| #else |
| void |
| zfs_znode_init(void) |
| { |
| /* |
| * Initialize zcache |
| */ |
| ASSERT3P(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); |
| } |
| |
| static znode_t * |
| zfs_znode_alloc_kmem(int flags) |
| { |
| |
| return (kmem_cache_alloc(znode_cache, flags)); |
| } |
| |
| static void |
| zfs_znode_free_kmem(znode_t *zp) |
| { |
| if (zp->z_xattr_cached) { |
| nvlist_free(zp->z_xattr_cached); |
| zp->z_xattr_cached = NULL; |
| } |
| kmem_cache_free(znode_cache, zp); |
| } |
| #endif |
| |
| void |
| zfs_znode_fini(void) |
| { |
| /* |
| * Cleanup zcache |
| */ |
| #ifdef _ZFS_USE_SMR |
| if (znode_uma_zone) { |
| uma_zdestroy(znode_uma_zone); |
| znode_uma_zone = NULL; |
| } |
| #else |
| if (znode_cache) { |
| kmem_cache_destroy(znode_cache); |
| znode_cache = NULL; |
| } |
| #endif |
| } |
| |
| |
| static int |
| zfs_create_share_dir(zfsvfs_t *zfsvfs, dmu_tx_t *tx) |
| { |
| zfs_acl_ids_t acl_ids; |
| vattr_t vattr; |
| znode_t *sharezp; |
| znode_t *zp; |
| int error; |
| |
| vattr.va_mask = AT_MODE|AT_UID|AT_GID; |
| vattr.va_type = VDIR; |
| vattr.va_mode = S_IFDIR|0555; |
| vattr.va_uid = crgetuid(kcred); |
| vattr.va_gid = crgetgid(kcred); |
| |
| sharezp = zfs_znode_alloc_kmem(KM_SLEEP); |
| ASSERT(!POINTER_IS_VALID(sharezp->z_zfsvfs)); |
| sharezp->z_unlinked = 0; |
| sharezp->z_atime_dirty = 0; |
| sharezp->z_zfsvfs = zfsvfs; |
| sharezp->z_is_sa = zfsvfs->z_use_sa; |
| |
| VERIFY0(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); |
| 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); |
| sa_handle_destroy(sharezp->z_sa_hdl); |
| zfs_znode_free_kmem(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) |
| { |
| return (((uint64_t)major(dev) << NBITSMINOR64) | minor(dev)); |
| } |
| /* |
| * 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) |
| { |
| return (makedev((dev >> NBITSMINOR64), (dev & MAXMIN64))); |
| } |
| |
| 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))); |
| |
| ASSERT3P(zp->z_sa_hdl, ==, NULL); |
| ASSERT3P(zp->z_acl_cached, ==, NULL); |
| if (sa_hdl == NULL) { |
| VERIFY0(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 unless we are the root |
| * node of a snapshot mounted under .zfs. |
| */ |
| if (zp->z_id == zfsvfs->z_root && zfsvfs->z_parent == zfsvfs) |
| ZTOV(zp)->v_flag |= VROOT; |
| |
| 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 || |
| ZFS_TEARDOWN_INACTIVE_WRITE_HELD(zp->z_zfsvfs)); |
| |
| sa_handle_destroy(zp->z_sa_hdl); |
| zp->z_sa_hdl = NULL; |
| } |
| |
| static void |
| zfs_vnode_forget(vnode_t *vp) |
| { |
| |
| /* copied from insmntque_stddtr */ |
| vp->v_data = NULL; |
| vp->v_op = &dead_vnodeops; |
| vgone(vp); |
| vput(vp); |
| } |
| |
| /* |
| * Construct a new znode/vnode and initialize. |
| * |
| * 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; |
| #ifdef notyet |
| uint64_t mtime[2], ctime[2]; |
| #endif |
| uint64_t projid = ZFS_DEFAULT_PROJID; |
| sa_bulk_attr_t bulk[9]; |
| int count = 0; |
| int error; |
| |
| zp = zfs_znode_alloc_kmem(KM_SLEEP); |
| |
| #ifndef _ZFS_USE_SMR |
| KASSERT((zfsvfs->z_parent->z_vfs->mnt_kern_flag & MNTK_FPLOOKUP) == 0, |
| ("%s: fast path lookup enabled without smr", __func__)); |
| #endif |
| |
| #if __FreeBSD_version >= 1300076 |
| KASSERT(curthread->td_vp_reserved != NULL, |
| ("zfs_znode_alloc: getnewvnode without any vnodes reserved")); |
| #else |
| KASSERT(curthread->td_vp_reserv > 0, |
| ("zfs_znode_alloc: getnewvnode without any vnodes reserved")); |
| #endif |
| error = getnewvnode("zfs", zfsvfs->z_parent->z_vfs, &zfs_vnodeops, &vp); |
| if (error != 0) { |
| zfs_znode_free_kmem(zp); |
| return (NULL); |
| } |
| zp->z_vnode = vp; |
| vp->v_data = zp; |
| |
| ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs)); |
| |
| 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; |
| zp->z_sync_writes_cnt = 0; |
| zp->z_async_writes_cnt = 0; |
| #if __FreeBSD_version >= 1300139 |
| atomic_store_ptr(&zp->z_cached_symlink, NULL); |
| #endif |
| |
| vp = ZTOV(zp); |
| |
| 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); |
| #ifdef notyet |
| 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); |
| #endif |
| 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 || |
| (dmu_objset_projectquota_enabled(zfsvfs->z_os) && |
| (zp->z_pflags & ZFS_PROJID) && |
| sa_lookup(zp->z_sa_hdl, SA_ZPL_PROJID(zfsvfs), &projid, 8) != 0)) { |
| if (hdl == NULL) |
| sa_handle_destroy(zp->z_sa_hdl); |
| zfs_vnode_forget(vp); |
| zp->z_vnode = NULL; |
| zfs_znode_free_kmem(zp); |
| return (NULL); |
| } |
| |
| zp->z_projid = projid; |
| zp->z_mode = mode; |
| |
| /* Cache the xattr parent id */ |
| if (zp->z_pflags & ZFS_XATTR) |
| zp->z_xattr_parent = parent; |
| |
| vp->v_type = IFTOVT((mode_t)mode); |
| |
| switch (vp->v_type) { |
| case VDIR: |
| zp->z_zn_prefetch = B_TRUE; /* z_prefetch default is enabled */ |
| break; |
| case VFIFO: |
| vp->v_op = &zfs_fifoops; |
| break; |
| case VREG: |
| if (parent == zfsvfs->z_shares_dir) { |
| ASSERT0(zp->z_uid); |
| ASSERT0(zp->z_gid); |
| vp->v_op = &zfs_shareops; |
| } |
| break; |
| default: |
| break; |
| } |
| |
| mutex_enter(&zfsvfs->z_znodes_lock); |
| list_insert_tail(&zfsvfs->z_all_znodes, zp); |
| zfsvfs->z_nr_znodes++; |
| zp->z_zfsvfs = zfsvfs; |
| mutex_exit(&zfsvfs->z_znodes_lock); |
| |
| /* |
| * Acquire vnode lock before making it available to the world. |
| */ |
| vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); |
| #if __FreeBSD_version >= 1400077 |
| vn_set_state(vp, VSTATE_CONSTRUCTED); |
| #endif |
| VN_LOCK_AREC(vp); |
| if (vp->v_type != VFIFO) |
| VN_LOCK_ASHARE(vp); |
| |
| 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 bonuslen; |
| int dnodesize; |
| 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 }; |
| |
| ASSERT3P(vap, !=, NULL); |
| ASSERT3U((vap->va_mask & AT_MODE), ==, AT_MODE); |
| |
| if (zfsvfs->z_replay) { |
| obj = vap->va_nodeid; |
| now = vap->va_ctime; /* see zfs_replay_create() */ |
| gen = vap->va_nblocks; /* ditto */ |
| dnodesize = vap->va_fsid; /* ditto */ |
| } else { |
| obj = 0; |
| vfs_timestamp(&now); |
| gen = dmu_tx_get_txg(tx); |
| dnodesize = dmu_objset_dnodesize(zfsvfs->z_os); |
| } |
| |
| if (dnodesize == 0) |
| dnodesize = DNODE_MIN_SIZE; |
| |
| obj_type = zfsvfs->z_use_sa ? DMU_OT_SA : DMU_OT_ZNODE; |
| bonuslen = (obj_type == DMU_OT_SA) ? |
| DN_BONUS_SIZE(dnodesize) : 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) { |
| VERIFY0(zap_create_claim_norm_dnsize(zfsvfs->z_os, obj, |
| zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS, |
| obj_type, bonuslen, dnodesize, tx)); |
| } else { |
| obj = zap_create_norm_dnsize(zfsvfs->z_os, |
| zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS, |
| obj_type, bonuslen, dnodesize, tx); |
| } |
| } else { |
| if (zfsvfs->z_replay) { |
| VERIFY0(dmu_object_claim_dnsize(zfsvfs->z_os, obj, |
| DMU_OT_PLAIN_FILE_CONTENTS, 0, |
| obj_type, bonuslen, dnodesize, tx)); |
| } else { |
| obj = dmu_object_alloc_dnsize(zfsvfs->z_os, |
| DMU_OT_PLAIN_FILE_CONTENTS, 0, |
| obj_type, bonuslen, dnodesize, tx); |
| } |
| } |
| |
| ZFS_OBJ_HOLD_ENTER(zfsvfs, obj); |
| VERIFY0(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 determined 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 */ |
| VERIFY0(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); |
| } |
| |
| VERIFY0(sa_replace_all_by_template(sa_hdl, sa_attrs, cnt, tx)); |
| |
| if (!(flag & IS_ROOT_NODE)) { |
| *zpp = zfs_znode_alloc(zfsvfs, db, 0, obj_type, sa_hdl); |
| ASSERT3P(*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; |
| (*zpp)->z_dnodesize = dnodesize; |
| |
| 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) { |
| VERIFY0(zfs_aclset_common(*zpp, acl_ids->z_aclp, cr, tx)); |
| } |
| if (!(flag & IS_ROOT_NODE)) { |
| vnode_t *vp = ZTOV(*zpp); |
| vp->v_vflag |= VV_FORCEINSMQ; |
| int err = insmntque(vp, zfsvfs->z_vfs); |
| vp->v_vflag &= ~VV_FORCEINSMQ; |
| (void) err; |
| KASSERT(err == 0, ("insmntque() failed: error %d", err)); |
| } |
| kmem_free(sa_attrs, sizeof (sa_bulk_attr_t) * ZPL_END); |
| ZFS_OBJ_HOLD_EXIT(zfsvfs, obj); |
| } |
| |
| /* |
| * Update 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); |
| ASSERT3P(xoap, !=, NULL); |
| |
| if (zp->z_zfsvfs->z_replay == B_FALSE) { |
| ASSERT_VOP_IN_SEQC(ZTOV(zp)); |
| } |
| |
| 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; |
| vnode_t *vp; |
| sa_handle_t *hdl; |
| int locked; |
| int err; |
| |
| getnewvnode_reserve_(); |
| again: |
| *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); |
| getnewvnode_drop_reserve(); |
| 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); |
| getnewvnode_drop_reserve(); |
| return (SET_ERROR(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); |
| ASSERT3U(zp->z_id, ==, obj_num); |
| if (zp->z_unlinked) { |
| err = SET_ERROR(ENOENT); |
| } else { |
| vp = ZTOV(zp); |
| /* |
| * Don't let the vnode disappear after |
| * ZFS_OBJ_HOLD_EXIT. |
| */ |
| VN_HOLD(vp); |
| *zpp = zp; |
| err = 0; |
| } |
| |
| sa_buf_rele(db, NULL); |
| ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); |
| |
| if (err) { |
| getnewvnode_drop_reserve(); |
| return (err); |
| } |
| |
| locked = VOP_ISLOCKED(vp); |
| VI_LOCK(vp); |
| if (VN_IS_DOOMED(vp) && locked != LK_EXCLUSIVE) { |
| /* |
| * The vnode is doomed and this thread doesn't |
| * hold the exclusive lock on it, so the vnode |
| * must be being reclaimed by another thread. |
| * Otherwise the doomed vnode is being reclaimed |
| * by this thread and zfs_zget is called from |
| * ZIL internals. |
| */ |
| VI_UNLOCK(vp); |
| |
| /* |
| * XXX vrele() locks the vnode when the last reference |
| * is dropped. Although in this case the vnode is |
| * doomed / dead and so no inactivation is required, |
| * the vnode lock is still acquired. That could result |
| * in a LOR with z_teardown_lock if another thread holds |
| * the vnode's lock and tries to take z_teardown_lock. |
| * But that is only possible if the other thread peforms |
| * a ZFS vnode operation on the vnode. That either |
| * should not happen if the vnode is dead or the thread |
| * should also have a reference to the vnode and thus |
| * our reference is not last. |
| */ |
| VN_RELE(vp); |
| goto again; |
| } |
| VI_UNLOCK(vp); |
| getnewvnode_drop_reserve(); |
| 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 = SET_ERROR(ENOENT); |
| } else { |
| *zpp = zp; |
| } |
| if (err == 0) { |
| vnode_t *vp = ZTOV(zp); |
| |
| err = insmntque(vp, zfsvfs->z_vfs); |
| if (err == 0) { |
| vp->v_hash = obj_num; |
| VOP_UNLOCK1(vp); |
| } else { |
| zp->z_vnode = NULL; |
| zfs_znode_dmu_fini(zp); |
| zfs_znode_free(zp); |
| *zpp = NULL; |
| } |
| } |
| ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); |
| getnewvnode_drop_reserve(); |
| return (err); |
| } |
| |
| int |
| zfs_rezget(znode_t *zp) |
| { |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| dmu_object_info_t doi; |
| dmu_buf_t *db; |
| vnode_t *vp; |
| uint64_t obj_num = zp->z_id; |
| uint64_t mode, size; |
| sa_bulk_attr_t bulk[8]; |
| int err; |
| int count = 0; |
| uint64_t gen; |
| |
| /* |
| * Remove cached pages before reloading the znode, so that they are not |
| * lingering after we run into any error. Ideally, we should vgone() |
| * the vnode in case of error, but currently we cannot do that |
| * because of the LOR between the vnode lock and z_teardown_lock. |
| * So, instead, we have to "doom" the znode in the illumos style. |
| * |
| * Ignore invalid pages during the scan. This is to avoid deadlocks |
| * between page busying and the teardown lock, as pages are busied prior |
| * to a VOP_GETPAGES operation, which acquires the teardown read lock. |
| * Such pages will be invalid and can safely be skipped here. |
| */ |
| vp = ZTOV(zp); |
| #if __FreeBSD_version >= 1400042 |
| vn_pages_remove_valid(vp, 0, 0); |
| #else |
| vn_pages_remove(vp, 0, 0); |
| #endif |
| |
| 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); |
| |
| rw_enter(&zp->z_xattr_lock, RW_WRITER); |
| if (zp->z_xattr_cached) { |
| nvlist_free(zp->z_xattr_cached); |
| zp->z_xattr_cached = NULL; |
| } |
| rw_exit(&zp->z_xattr_lock); |
| |
| ASSERT3P(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 (SET_ERROR(EINVAL)); |
| } |
| |
| zfs_znode_sa_init(zfsvfs, zp, db, doi.doi_bonus_type, NULL); |
| size = zp->z_size; |
| |
| /* 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 (SET_ERROR(EIO)); |
| } |
| |
| zp->z_mode = mode; |
| |
| if (gen != zp->z_gen) { |
| zfs_znode_dmu_fini(zp); |
| ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); |
| return (SET_ERROR(EIO)); |
| } |
| |
| /* |
| * It is highly improbable but still quite possible that two |
| * objects in different datasets are created with the same |
| * object numbers and in transaction groups with the same |
| * numbers. znodes corresponding to those objects would |
| * have the same z_id and z_gen, but their other attributes |
| * may be different. |
| * zfs recv -F may replace one of such objects with the other. |
| * As a result file properties recorded in the replaced |
| * object's vnode may no longer match the received object's |
| * properties. At present the only cached property is the |
| * files type recorded in v_type. |
| * So, handle this case by leaving the old vnode and znode |
| * disassociated from the actual object. A new vnode and a |
| * znode will be created if the object is accessed |
| * (e.g. via a look-up). The old vnode and znode will be |
| * recycled when the last vnode reference is dropped. |
| */ |
| if (vp->v_type != IFTOVT((mode_t)zp->z_mode)) { |
| zfs_znode_dmu_fini(zp); |
| ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); |
| return (SET_ERROR(EIO)); |
| } |
| |
| /* |
| * If the file has zero links, then it has been unlinked on the send |
| * side and it must be in the received unlinked set. |
| * We call zfs_znode_dmu_fini() now to prevent any accesses to the |
| * stale data and to prevent automatically removal of the file in |
| * zfs_zinactive(). The file will be removed either when it is removed |
| * on the send side and the next incremental stream is received or |
| * when the unlinked set gets processed. |
| */ |
| zp->z_unlinked = (zp->z_links == 0); |
| if (zp->z_unlinked) { |
| zfs_znode_dmu_fini(zp); |
| ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); |
| return (0); |
| } |
| |
| zp->z_blksz = doi.doi_data_block_size; |
| if (zp->z_size != size) |
| vnode_pager_setsize(vp, zp->z_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); |
| VERIFY0(dmu_object_free(os, acl_obj, tx)); |
| } |
| VERIFY0(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) |
| { |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| uint64_t z_id = zp->z_id; |
| |
| ASSERT3P(zp->z_sa_hdl, !=, NULL); |
| |
| /* |
| * Don't allow a zfs_zget() while were trying to release this znode |
| */ |
| ZFS_OBJ_HOLD_ENTER(zfsvfs, z_id); |
| |
| /* |
| * If this was the last reference to a file with no links, remove |
| * the file from the file system unless the file system is mounted |
| * read-only. That can happen, for example, if the file system was |
| * originally read-write, the file was opened, then unlinked and |
| * the file system was made read-only before the file was finally |
| * closed. The file will remain in the unlinked set. |
| */ |
| if (zp->z_unlinked) { |
| ASSERT(!zfsvfs->z_issnap); |
| if ((zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) == 0) { |
| ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); |
| zfs_rmnode(zp); |
| return; |
| } |
| } |
| |
| 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; |
| #if __FreeBSD_version >= 1300139 |
| char *symlink; |
| #endif |
| |
| ASSERT3P(zp->z_sa_hdl, ==, NULL); |
| zp->z_vnode = NULL; |
| mutex_enter(&zfsvfs->z_znodes_lock); |
| POINTER_INVALIDATE(&zp->z_zfsvfs); |
| list_remove(&zfsvfs->z_all_znodes, zp); |
| zfsvfs->z_nr_znodes--; |
| mutex_exit(&zfsvfs->z_znodes_lock); |
| |
| #if __FreeBSD_version >= 1300139 |
| symlink = atomic_load_ptr(&zp->z_cached_symlink); |
| if (symlink != NULL) { |
| atomic_store_rel_ptr((uintptr_t *)&zp->z_cached_symlink, |
| (uintptr_t)NULL); |
| cache_symlink_free(symlink, strlen(symlink) + 1); |
| } |
| #endif |
| |
| if (zp->z_acl_cached) { |
| zfs_acl_free(zp->z_acl_cached); |
| zp->z_acl_cached = NULL; |
| } |
| |
| zfs_znode_free_kmem(zp); |
| } |
| |
| void |
| zfs_tstamp_update_setup_ext(znode_t *zp, uint_t flag, uint64_t mtime[2], |
| uint64_t ctime[2], boolean_t have_tx) |
| { |
| timestruc_t now; |
| |
| vfs_timestamp(&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; |
| } |
| } |
| |
| |
| void |
| zfs_tstamp_update_setup(znode_t *zp, uint_t flag, uint64_t mtime[2], |
| uint64_t ctime[2]) |
| { |
| zfs_tstamp_update_setup_ext(zp, flag, mtime, ctime, B_TRUE); |
| } |
| /* |
| * 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; |
| ASSERT0(error); |
| |
| /* What blocksize did we actually get? */ |
| dmu_object_size_from_db(sa_get_db(zp->z_sa_hdl), &zp->z_blksz, &dummy); |
| } |
| |
| /* |
| * Increase the file length |
| * |
| * IN: zp - znode of file to free data in. |
| * end - new end-of-file |
| * |
| * RETURN: 0 on success, error code on failure |
| */ |
| static int |
| zfs_extend(znode_t *zp, uint64_t end) |
| { |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| dmu_tx_t *tx; |
| zfs_locked_range_t *lr; |
| uint64_t newblksz; |
| int error; |
| |
| /* |
| * We will change zp_size, lock the whole file. |
| */ |
| lr = zfs_rangelock_enter(&zp->z_rangelock, 0, UINT64_MAX, RL_WRITER); |
| |
| /* |
| * Nothing to do if file already at desired length. |
| */ |
| if (end <= zp->z_size) { |
| zfs_rangelock_exit(lr); |
| return (0); |
| } |
| 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) { |
| /* |
| * File's blocksize is already larger than the |
| * "recordsize" property. Only let it grow to |
| * the next power of 2. |
| */ |
| ASSERT(!ISP2(zp->z_blksz)); |
| newblksz = MIN(end, 1 << highbit64(zp->z_blksz)); |
| } 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_WAIT); |
| if (error) { |
| dmu_tx_abort(tx); |
| zfs_rangelock_exit(lr); |
| return (error); |
| } |
| |
| if (newblksz) |
| zfs_grow_blocksize(zp, newblksz, tx); |
| |
| zp->z_size = end; |
| |
| VERIFY0(sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zp->z_zfsvfs), |
| &zp->z_size, sizeof (zp->z_size), tx)); |
| |
| vnode_pager_setsize(ZTOV(zp), end); |
| |
| zfs_rangelock_exit(lr); |
| |
| 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 on success, error code on failure |
| */ |
| static int |
| zfs_free_range(znode_t *zp, uint64_t off, uint64_t len) |
| { |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| zfs_locked_range_t *lr; |
| int error; |
| |
| /* |
| * Lock the range being freed. |
| */ |
| lr = zfs_rangelock_enter(&zp->z_rangelock, off, len, RL_WRITER); |
| |
| /* |
| * Nothing to do if file already at desired length. |
| */ |
| if (off >= zp->z_size) { |
| zfs_rangelock_exit(lr); |
| 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); |
| |
| if (error == 0) { |
| #if __FreeBSD_version >= 1400032 |
| vnode_pager_purge_range(ZTOV(zp), off, off + len); |
| #else |
| /* |
| * Before __FreeBSD_version 1400032 we cannot free block in the |
| * middle of a file, but only at the end of a file, so this code |
| * path should never happen. |
| */ |
| vnode_pager_setsize(ZTOV(zp), off); |
| #endif |
| } |
| |
| zfs_rangelock_exit(lr); |
| |
| return (error); |
| } |
| |
| /* |
| * Truncate a file |
| * |
| * IN: zp - znode of file to free data in. |
| * end - new end-of-file. |
| * |
| * RETURN: 0 on success, error code on 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; |
| zfs_locked_range_t *lr; |
| int error; |
| sa_bulk_attr_t bulk[2]; |
| int count = 0; |
| |
| /* |
| * We will change zp_size, lock the whole file. |
| */ |
| lr = zfs_rangelock_enter(&zp->z_rangelock, 0, UINT64_MAX, RL_WRITER); |
| |
| /* |
| * Nothing to do if file already at desired length. |
| */ |
| if (end >= zp->z_size) { |
| zfs_rangelock_exit(lr); |
| return (0); |
| } |
| |
| error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, end, |
| DMU_OBJECT_END); |
| if (error) { |
| zfs_rangelock_exit(lr); |
| return (error); |
| } |
| tx = dmu_tx_create(zfsvfs->z_os); |
| dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); |
| zfs_sa_upgrade_txholds(tx, zp); |
| dmu_tx_mark_netfree(tx); |
| error = dmu_tx_assign(tx, TXG_WAIT); |
| if (error) { |
| dmu_tx_abort(tx); |
| zfs_rangelock_exit(lr); |
| 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); |
| } |
| VERIFY0(sa_bulk_update(zp->z_sa_hdl, bulk, count, tx)); |
| |
| 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. |
| */ |
| vnode_pager_setsize(vp, end); |
| |
| zfs_rangelock_exit(lr); |
| |
| 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 on success, error code on failure |
| */ |
| int |
| zfs_freesp(znode_t *zp, uint64_t off, uint64_t len, int flag, boolean_t log) |
| { |
| 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); |
| } |
| |
| 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_WAIT); |
| if (error) { |
| 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); |
| error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx); |
| ASSERT0(error); |
| |
| 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) |
| { |
| 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; |
| zfsvfs_t *zfsvfs; |
| 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); |
| ASSERT0(error); |
| |
| /* |
| * 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; |
| |
| ASSERT3S(nvpair_type(elem), ==, DATA_TYPE_UINT64); |
| val = fnvpair_value_uint64(elem); |
| 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); |
| } |
| ASSERT0(error); |
| 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; |
| } |
| ASSERT3U(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); |
| ASSERT0(error); |
| } 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); |
| ASSERT0(error); |
| |
| /* |
| * Create root znode. Create minimal znode/vnode/zfsvfs |
| * to allow zfs_mknode to work. |
| */ |
| VATTR_NULL(&vattr); |
| vattr.va_mask = AT_MODE|AT_UID|AT_GID; |
| vattr.va_type = VDIR; |
| vattr.va_mode = S_IFDIR|0755; |
| vattr.va_uid = crgetuid(cr); |
| vattr.va_gid = crgetgid(cr); |
| |
| zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP); |
| |
| rootzp = zfs_znode_alloc_kmem(KM_SLEEP); |
| ASSERT(!POINTER_IS_VALID(rootzp->z_zfsvfs)); |
| rootzp->z_unlinked = 0; |
| rootzp->z_atime_dirty = 0; |
| rootzp->z_is_sa = USE_SA(version, os); |
| |
| 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); |
| |
| ASSERT0(error); |
| |
| /* |
| * 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; |
| VERIFY0(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); |
| error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &rootzp->z_id, tx); |
| ASSERT0(error); |
| zfs_acl_ids_free(&acl_ids); |
| POINTER_INVALIDATE(&rootzp->z_zfsvfs); |
| |
| sa_handle_destroy(rootzp->z_sa_hdl); |
| zfs_znode_free_kmem(rootzp); |
| |
| /* |
| * Create shares directory |
| */ |
| |
| error = zfs_create_share_dir(zfsvfs, tx); |
| |
| ASSERT0(error); |
| |
| for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) |
| mutex_destroy(&zfsvfs->z_hold_mtx[i]); |
| kmem_free(zfsvfs, sizeof (zfsvfs_t)); |
| } |
| #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 (SET_ERROR(ENOTSUP)); |
| } |
| |
| error = sa_handle_get(osp, obj, NULL, SA_HDL_PRIVATE, hdlp); |
| if (error != 0) { |
| sa_buf_rele(*db, tag); |
| return (error); |
| } |
| |
| return (0); |
| } |
| |
| static 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(objset_t *osp, 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; |
| uint64_t parent_mode; |
| sa_bulk_attr_t bulk[3]; |
| sa_handle_t *sa_hdl; |
| dmu_buf_t *sa_db; |
| 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); |
| |
| /* |
| * When a link is removed its parent pointer is not changed and will |
| * be invalid. There are two cases where a link is removed but the |
| * file stays around, when it goes to the delete queue and when there |
| * are additional links. |
| */ |
| error = zfs_grab_sa_handle(osp, parent, &sa_hdl, &sa_db, FTAG); |
| if (error != 0) |
| return (error); |
| |
| error = sa_lookup(sa_hdl, ZPL_MODE, &parent_mode, sizeof (parent_mode)); |
| zfs_release_sa_handle(sa_hdl, sa_db, FTAG); |
| if (error != 0) |
| return (error); |
| |
| *is_xattrdir = ((pflags & ZFS_XATTR) != 0) && S_ISDIR(mode); |
| |
| /* |
| * Extended attributes can be applied to files, directories, etc. |
| * Otherwise the parent must be a directory. |
| */ |
| if (!*is_xattrdir && !S_ISDIR(parent_mode)) |
| return (SET_ERROR(EINVAL)); |
| |
| *pobjp = parent; |
| |
| 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; |
| |
| uint64_t deleteq_obj; |
| VERIFY0(zap_lookup(osp, MASTER_NODE_OBJ, |
| ZFS_UNLINKED_SET, sizeof (uint64_t), 1, &deleteq_obj)); |
| error = zap_lookup_int(osp, deleteq_obj, obj); |
| if (error == 0) { |
| return (ESTALE); |
| } else if (error != ENOENT) { |
| return (error); |
| } |
| error = 0; |
| |
| for (;;) { |
| uint64_t pobj; |
| char component[MAXNAMELEN + 2]; |
| size_t complen; |
| int is_xattrdir; |
| |
| if (prevdb) { |
| ASSERT3P(prevhdl, !=, NULL); |
| zfs_release_sa_handle(prevhdl, prevdb, FTAG); |
| } |
| |
| if ((error = zfs_obj_to_pobj(osp, 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; |
| ASSERT3P(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) { |
| ASSERT3P(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); |
| } |
| |
| |
| void |
| zfs_znode_update_vfs(znode_t *zp) |
| { |
| vm_object_t object; |
| |
| if ((object = ZTOV(zp)->v_object) == NULL || |
| zp->z_size == object->un_pager.vnp.vnp_size) |
| return; |
| |
| vnode_pager_setsize(ZTOV(zp), zp->z_size); |
| } |
| |
| |
| #ifdef _KERNEL |
| int |
| zfs_znode_parent_and_name(znode_t *zp, znode_t **dzpp, char *buf) |
| { |
| zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
| uint64_t parent; |
| int is_xattrdir; |
| int err; |
| |
| /* Extended attributes should not be visible as regular files. */ |
| if ((zp->z_pflags & ZFS_XATTR) != 0) |
| return (SET_ERROR(EINVAL)); |
| |
| err = zfs_obj_to_pobj(zfsvfs->z_os, zp->z_sa_hdl, zfsvfs->z_attr_table, |
| &parent, &is_xattrdir); |
| if (err != 0) |
| return (err); |
| ASSERT0(is_xattrdir); |
| |
| /* No name as this is a root object. */ |
| if (parent == zp->z_id) |
| return (SET_ERROR(EINVAL)); |
| |
| err = zap_value_search(zfsvfs->z_os, parent, zp->z_id, |
| ZFS_DIRENT_OBJ(-1ULL), buf); |
| if (err != 0) |
| return (err); |
| err = zfs_zget(zfsvfs, parent, dzpp); |
| return (err); |
| } |
| #endif /* _KERNEL */ |