diff --git a/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_acl.c b/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_acl.c index 23b87de8bd0d..7089d0e0e887 100644 --- a/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_acl.c +++ b/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_acl.c @@ -1,2700 +1,2703 @@ /* * 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) 2013 by Delphix. All rights reserved. * Copyright 2017 Nexenta Systems, Inc. All rights reserved. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define ALLOW ACE_ACCESS_ALLOWED_ACE_TYPE #define DENY ACE_ACCESS_DENIED_ACE_TYPE #define MAX_ACE_TYPE ACE_SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE #define MIN_ACE_TYPE ALLOW #define OWNING_GROUP (ACE_GROUP|ACE_IDENTIFIER_GROUP) #define EVERYONE_ALLOW_MASK (ACE_READ_ACL|ACE_READ_ATTRIBUTES | \ ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE) #define EVERYONE_DENY_MASK (ACE_WRITE_ACL|ACE_WRITE_OWNER | \ ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS) #define OWNER_ALLOW_MASK (ACE_WRITE_ACL | ACE_WRITE_OWNER | \ ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS) #define ZFS_CHECKED_MASKS (ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_DATA| \ ACE_READ_NAMED_ATTRS|ACE_WRITE_DATA|ACE_WRITE_ATTRIBUTES| \ ACE_WRITE_NAMED_ATTRS|ACE_APPEND_DATA|ACE_EXECUTE|ACE_WRITE_OWNER| \ ACE_WRITE_ACL|ACE_DELETE|ACE_DELETE_CHILD|ACE_SYNCHRONIZE) #define WRITE_MASK_DATA (ACE_WRITE_DATA|ACE_APPEND_DATA|ACE_WRITE_NAMED_ATTRS) #define WRITE_MASK_ATTRS (ACE_WRITE_ACL|ACE_WRITE_OWNER|ACE_WRITE_ATTRIBUTES| \ ACE_DELETE|ACE_DELETE_CHILD) #define WRITE_MASK (WRITE_MASK_DATA|WRITE_MASK_ATTRS) #define OGE_CLEAR (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \ ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE) #define OKAY_MASK_BITS (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \ ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE) #define ALL_INHERIT (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE | \ ACE_NO_PROPAGATE_INHERIT_ACE|ACE_INHERIT_ONLY_ACE|ACE_INHERITED_ACE) #define RESTRICTED_CLEAR (ACE_WRITE_ACL|ACE_WRITE_OWNER) #define V4_ACL_WIDE_FLAGS (ZFS_ACL_AUTO_INHERIT|ZFS_ACL_DEFAULTED|\ ZFS_ACL_PROTECTED) #define ZFS_ACL_WIDE_FLAGS (V4_ACL_WIDE_FLAGS|ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|\ ZFS_ACL_OBJ_ACE) #define ALL_MODE_EXECS (S_IXUSR | S_IXGRP | S_IXOTH) static uint16_t zfs_ace_v0_get_type(void *acep) { return (((zfs_oldace_t *)acep)->z_type); } static uint16_t zfs_ace_v0_get_flags(void *acep) { return (((zfs_oldace_t *)acep)->z_flags); } static uint32_t zfs_ace_v0_get_mask(void *acep) { return (((zfs_oldace_t *)acep)->z_access_mask); } static uint64_t zfs_ace_v0_get_who(void *acep) { return (((zfs_oldace_t *)acep)->z_fuid); } static void zfs_ace_v0_set_type(void *acep, uint16_t type) { ((zfs_oldace_t *)acep)->z_type = type; } static void zfs_ace_v0_set_flags(void *acep, uint16_t flags) { ((zfs_oldace_t *)acep)->z_flags = flags; } static void zfs_ace_v0_set_mask(void *acep, uint32_t mask) { ((zfs_oldace_t *)acep)->z_access_mask = mask; } static void zfs_ace_v0_set_who(void *acep, uint64_t who) { ((zfs_oldace_t *)acep)->z_fuid = who; } /*ARGSUSED*/ static size_t zfs_ace_v0_size(void *acep) { return (sizeof (zfs_oldace_t)); } static size_t zfs_ace_v0_abstract_size(void) { return (sizeof (zfs_oldace_t)); } static int zfs_ace_v0_mask_off(void) { return (offsetof(zfs_oldace_t, z_access_mask)); } /*ARGSUSED*/ static int zfs_ace_v0_data(void *acep, void **datap) { *datap = NULL; return (0); } static acl_ops_t zfs_acl_v0_ops = { zfs_ace_v0_get_mask, zfs_ace_v0_set_mask, zfs_ace_v0_get_flags, zfs_ace_v0_set_flags, zfs_ace_v0_get_type, zfs_ace_v0_set_type, zfs_ace_v0_get_who, zfs_ace_v0_set_who, zfs_ace_v0_size, zfs_ace_v0_abstract_size, zfs_ace_v0_mask_off, zfs_ace_v0_data }; static uint16_t zfs_ace_fuid_get_type(void *acep) { return (((zfs_ace_hdr_t *)acep)->z_type); } static uint16_t zfs_ace_fuid_get_flags(void *acep) { return (((zfs_ace_hdr_t *)acep)->z_flags); } static uint32_t zfs_ace_fuid_get_mask(void *acep) { return (((zfs_ace_hdr_t *)acep)->z_access_mask); } static uint64_t zfs_ace_fuid_get_who(void *args) { uint16_t entry_type; zfs_ace_t *acep = args; entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS; if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP || entry_type == ACE_EVERYONE) return (-1); return (((zfs_ace_t *)acep)->z_fuid); } static void zfs_ace_fuid_set_type(void *acep, uint16_t type) { ((zfs_ace_hdr_t *)acep)->z_type = type; } static void zfs_ace_fuid_set_flags(void *acep, uint16_t flags) { ((zfs_ace_hdr_t *)acep)->z_flags = flags; } static void zfs_ace_fuid_set_mask(void *acep, uint32_t mask) { ((zfs_ace_hdr_t *)acep)->z_access_mask = mask; } static void zfs_ace_fuid_set_who(void *arg, uint64_t who) { zfs_ace_t *acep = arg; uint16_t entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS; if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP || entry_type == ACE_EVERYONE) return; acep->z_fuid = who; } static size_t zfs_ace_fuid_size(void *acep) { zfs_ace_hdr_t *zacep = acep; uint16_t entry_type; switch (zacep->z_type) { case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: return (sizeof (zfs_object_ace_t)); case ALLOW: case DENY: entry_type = (((zfs_ace_hdr_t *)acep)->z_flags & ACE_TYPE_FLAGS); if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP || entry_type == ACE_EVERYONE) return (sizeof (zfs_ace_hdr_t)); /*FALLTHROUGH*/ default: return (sizeof (zfs_ace_t)); } } static size_t zfs_ace_fuid_abstract_size(void) { return (sizeof (zfs_ace_hdr_t)); } static int zfs_ace_fuid_mask_off(void) { return (offsetof(zfs_ace_hdr_t, z_access_mask)); } static int zfs_ace_fuid_data(void *acep, void **datap) { zfs_ace_t *zacep = acep; zfs_object_ace_t *zobjp; switch (zacep->z_hdr.z_type) { case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: zobjp = acep; *datap = (caddr_t)zobjp + sizeof (zfs_ace_t); return (sizeof (zfs_object_ace_t) - sizeof (zfs_ace_t)); default: *datap = NULL; return (0); } } static acl_ops_t zfs_acl_fuid_ops = { zfs_ace_fuid_get_mask, zfs_ace_fuid_set_mask, zfs_ace_fuid_get_flags, zfs_ace_fuid_set_flags, zfs_ace_fuid_get_type, zfs_ace_fuid_set_type, zfs_ace_fuid_get_who, zfs_ace_fuid_set_who, zfs_ace_fuid_size, zfs_ace_fuid_abstract_size, zfs_ace_fuid_mask_off, zfs_ace_fuid_data }; /* * The following three functions are provided for compatibility with * older ZPL version in order to determine if the file use to have * an external ACL and what version of ACL previously existed on the * file. Would really be nice to not need this, sigh. */ uint64_t zfs_external_acl(znode_t *zp) { zfs_acl_phys_t acl_phys; int error; if (zp->z_is_sa) return (0); /* * Need to deal with a potential * race where zfs_sa_upgrade could cause * z_isa_sa to change. * * If the lookup fails then the state of z_is_sa should have * changed. */ if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zp->z_zfsvfs), &acl_phys, sizeof (acl_phys))) == 0) return (acl_phys.z_acl_extern_obj); else { /* * after upgrade the SA_ZPL_ZNODE_ACL should have been * removed */ VERIFY(zp->z_is_sa && error == ENOENT); return (0); } } /* * Determine size of ACL in bytes * * This is more complicated than it should be since we have to deal * with old external ACLs. */ static int zfs_acl_znode_info(znode_t *zp, int *aclsize, int *aclcount, zfs_acl_phys_t *aclphys) { zfsvfs_t *zfsvfs = zp->z_zfsvfs; uint64_t acl_count; int size; int error; ASSERT(MUTEX_HELD(&zp->z_acl_lock)); if (zp->z_is_sa) { if ((error = sa_size(zp->z_sa_hdl, SA_ZPL_DACL_ACES(zfsvfs), &size)) != 0) return (error); *aclsize = size; if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_COUNT(zfsvfs), &acl_count, sizeof (acl_count))) != 0) return (error); *aclcount = acl_count; } else { if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zfsvfs), aclphys, sizeof (*aclphys))) != 0) return (error); if (aclphys->z_acl_version == ZFS_ACL_VERSION_INITIAL) { *aclsize = ZFS_ACL_SIZE(aclphys->z_acl_size); *aclcount = aclphys->z_acl_size; } else { *aclsize = aclphys->z_acl_size; *aclcount = aclphys->z_acl_count; } } return (0); } int zfs_znode_acl_version(znode_t *zp) { zfs_acl_phys_t acl_phys; if (zp->z_is_sa) return (ZFS_ACL_VERSION_FUID); else { int error; /* * Need to deal with a potential * race where zfs_sa_upgrade could cause * z_isa_sa to change. * * If the lookup fails then the state of z_is_sa should have * changed. */ if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zp->z_zfsvfs), &acl_phys, sizeof (acl_phys))) == 0) return (acl_phys.z_acl_version); else { /* * After upgrade SA_ZPL_ZNODE_ACL should have * been removed. */ VERIFY(zp->z_is_sa && error == ENOENT); return (ZFS_ACL_VERSION_FUID); } } } static int zfs_acl_version(int version) { if (version < ZPL_VERSION_FUID) return (ZFS_ACL_VERSION_INITIAL); else return (ZFS_ACL_VERSION_FUID); } static int zfs_acl_version_zp(znode_t *zp) { return (zfs_acl_version(zp->z_zfsvfs->z_version)); } zfs_acl_t * zfs_acl_alloc(int vers) { zfs_acl_t *aclp; aclp = kmem_zalloc(sizeof (zfs_acl_t), KM_SLEEP); list_create(&aclp->z_acl, sizeof (zfs_acl_node_t), offsetof(zfs_acl_node_t, z_next)); aclp->z_version = vers; if (vers == ZFS_ACL_VERSION_FUID) aclp->z_ops = &zfs_acl_fuid_ops; else aclp->z_ops = &zfs_acl_v0_ops; return (aclp); } zfs_acl_node_t * zfs_acl_node_alloc(size_t bytes) { zfs_acl_node_t *aclnode; aclnode = kmem_zalloc(sizeof (zfs_acl_node_t), KM_SLEEP); if (bytes) { aclnode->z_acldata = kmem_alloc(bytes, KM_SLEEP); aclnode->z_allocdata = aclnode->z_acldata; aclnode->z_allocsize = bytes; aclnode->z_size = bytes; } return (aclnode); } static void zfs_acl_node_free(zfs_acl_node_t *aclnode) { if (aclnode->z_allocsize) kmem_free(aclnode->z_allocdata, aclnode->z_allocsize); kmem_free(aclnode, sizeof (zfs_acl_node_t)); } static void zfs_acl_release_nodes(zfs_acl_t *aclp) { zfs_acl_node_t *aclnode; while ((aclnode = list_head(&aclp->z_acl))) { list_remove(&aclp->z_acl, aclnode); zfs_acl_node_free(aclnode); } aclp->z_acl_count = 0; aclp->z_acl_bytes = 0; } void zfs_acl_free(zfs_acl_t *aclp) { zfs_acl_release_nodes(aclp); list_destroy(&aclp->z_acl); kmem_free(aclp, sizeof (zfs_acl_t)); } static boolean_t zfs_acl_valid_ace_type(uint_t type, uint_t flags) { uint16_t entry_type; switch (type) { case ALLOW: case DENY: case ACE_SYSTEM_AUDIT_ACE_TYPE: case ACE_SYSTEM_ALARM_ACE_TYPE: entry_type = flags & ACE_TYPE_FLAGS; return (entry_type == ACE_OWNER || entry_type == OWNING_GROUP || entry_type == ACE_EVERYONE || entry_type == 0 || entry_type == ACE_IDENTIFIER_GROUP); default: if (type >= MIN_ACE_TYPE && type <= MAX_ACE_TYPE) return (B_TRUE); } return (B_FALSE); } static boolean_t zfs_ace_valid(vtype_t obj_type, zfs_acl_t *aclp, uint16_t type, uint16_t iflags) { /* * first check type of entry */ if (!zfs_acl_valid_ace_type(type, iflags)) return (B_FALSE); switch (type) { case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: if (aclp->z_version < ZFS_ACL_VERSION_FUID) return (B_FALSE); aclp->z_hints |= ZFS_ACL_OBJ_ACE; } /* * next check inheritance level flags */ if (obj_type == VDIR && (iflags & (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE))) aclp->z_hints |= ZFS_INHERIT_ACE; if (iflags & (ACE_INHERIT_ONLY_ACE|ACE_NO_PROPAGATE_INHERIT_ACE)) { if ((iflags & (ACE_FILE_INHERIT_ACE| ACE_DIRECTORY_INHERIT_ACE)) == 0) { return (B_FALSE); } } return (B_TRUE); } static void * zfs_acl_next_ace(zfs_acl_t *aclp, void *start, uint64_t *who, uint32_t *access_mask, uint16_t *iflags, uint16_t *type) { zfs_acl_node_t *aclnode; ASSERT(aclp); if (start == NULL) { aclnode = list_head(&aclp->z_acl); if (aclnode == NULL) return (NULL); aclp->z_next_ace = aclnode->z_acldata; aclp->z_curr_node = aclnode; aclnode->z_ace_idx = 0; } aclnode = aclp->z_curr_node; if (aclnode == NULL) return (NULL); if (aclnode->z_ace_idx >= aclnode->z_ace_count) { aclnode = list_next(&aclp->z_acl, aclnode); if (aclnode == NULL) return (NULL); else { aclp->z_curr_node = aclnode; aclnode->z_ace_idx = 0; aclp->z_next_ace = aclnode->z_acldata; } } if (aclnode->z_ace_idx < aclnode->z_ace_count) { void *acep = aclp->z_next_ace; size_t ace_size; /* * Make sure we don't overstep our bounds */ ace_size = aclp->z_ops->ace_size(acep); if (((caddr_t)acep + ace_size) > ((caddr_t)aclnode->z_acldata + aclnode->z_size)) { return (NULL); } *iflags = aclp->z_ops->ace_flags_get(acep); *type = aclp->z_ops->ace_type_get(acep); *access_mask = aclp->z_ops->ace_mask_get(acep); *who = aclp->z_ops->ace_who_get(acep); aclp->z_next_ace = (caddr_t)aclp->z_next_ace + ace_size; aclnode->z_ace_idx++; return ((void *)acep); } return (NULL); } /*ARGSUSED*/ static uint64_t zfs_ace_walk(void *datap, uint64_t cookie, int aclcnt, uint16_t *flags, uint16_t *type, uint32_t *mask) { zfs_acl_t *aclp = datap; zfs_ace_hdr_t *acep = (zfs_ace_hdr_t *)(uintptr_t)cookie; uint64_t who; acep = zfs_acl_next_ace(aclp, acep, &who, mask, flags, type); return ((uint64_t)(uintptr_t)acep); } /* * Copy ACE to internal ZFS format. * While processing the ACL each ACE will be validated for correctness. * ACE FUIDs will be created later. */ static int zfs_copy_ace_2_fuid(zfsvfs_t *zfsvfs, vtype_t obj_type, zfs_acl_t *aclp, void *datap, zfs_ace_t *z_acl, uint64_t aclcnt, size_t *size, zfs_fuid_info_t **fuidp, cred_t *cr) { int i; uint16_t entry_type; zfs_ace_t *aceptr = z_acl; ace_t *acep = datap; zfs_object_ace_t *zobjacep; ace_object_t *aceobjp; for (i = 0; i != aclcnt; i++) { aceptr->z_hdr.z_access_mask = acep->a_access_mask; aceptr->z_hdr.z_flags = acep->a_flags; aceptr->z_hdr.z_type = acep->a_type; entry_type = aceptr->z_hdr.z_flags & ACE_TYPE_FLAGS; if (entry_type != ACE_OWNER && entry_type != OWNING_GROUP && entry_type != ACE_EVERYONE) { aceptr->z_fuid = zfs_fuid_create(zfsvfs, acep->a_who, cr, (entry_type == 0) ? ZFS_ACE_USER : ZFS_ACE_GROUP, fuidp); } /* * Make sure ACE is valid */ if (zfs_ace_valid(obj_type, aclp, aceptr->z_hdr.z_type, aceptr->z_hdr.z_flags) != B_TRUE) return (SET_ERROR(EINVAL)); switch (acep->a_type) { case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: zobjacep = (zfs_object_ace_t *)aceptr; aceobjp = (ace_object_t *)acep; bcopy(aceobjp->a_obj_type, zobjacep->z_object_type, sizeof (aceobjp->a_obj_type)); bcopy(aceobjp->a_inherit_obj_type, zobjacep->z_inherit_type, sizeof (aceobjp->a_inherit_obj_type)); acep = (ace_t *)((caddr_t)acep + sizeof (ace_object_t)); break; default: acep = (ace_t *)((caddr_t)acep + sizeof (ace_t)); } aceptr = (zfs_ace_t *)((caddr_t)aceptr + aclp->z_ops->ace_size(aceptr)); } *size = (caddr_t)aceptr - (caddr_t)z_acl; return (0); } /* * Copy ZFS ACEs to fixed size ace_t layout */ static void zfs_copy_fuid_2_ace(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, cred_t *cr, void *datap, int filter) { uint64_t who; uint32_t access_mask; uint16_t iflags, type; zfs_ace_hdr_t *zacep = NULL; ace_t *acep = datap; ace_object_t *objacep; zfs_object_ace_t *zobjacep; size_t ace_size; uint16_t entry_type; while ((zacep = zfs_acl_next_ace(aclp, zacep, &who, &access_mask, &iflags, &type))) { switch (type) { case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: if (filter) { continue; } zobjacep = (zfs_object_ace_t *)zacep; objacep = (ace_object_t *)acep; bcopy(zobjacep->z_object_type, objacep->a_obj_type, sizeof (zobjacep->z_object_type)); bcopy(zobjacep->z_inherit_type, objacep->a_inherit_obj_type, sizeof (zobjacep->z_inherit_type)); ace_size = sizeof (ace_object_t); break; default: ace_size = sizeof (ace_t); break; } entry_type = (iflags & ACE_TYPE_FLAGS); if ((entry_type != ACE_OWNER && entry_type != OWNING_GROUP && entry_type != ACE_EVERYONE)) { acep->a_who = zfs_fuid_map_id(zfsvfs, who, cr, (entry_type & ACE_IDENTIFIER_GROUP) ? ZFS_ACE_GROUP : ZFS_ACE_USER); } else { acep->a_who = (uid_t)(int64_t)who; } acep->a_access_mask = access_mask; acep->a_flags = iflags; acep->a_type = type; acep = (ace_t *)((caddr_t)acep + ace_size); } } static int zfs_copy_ace_2_oldace(vtype_t obj_type, zfs_acl_t *aclp, ace_t *acep, zfs_oldace_t *z_acl, int aclcnt, size_t *size) { int i; zfs_oldace_t *aceptr = z_acl; for (i = 0; i != aclcnt; i++, aceptr++) { aceptr->z_access_mask = acep[i].a_access_mask; aceptr->z_type = acep[i].a_type; aceptr->z_flags = acep[i].a_flags; aceptr->z_fuid = acep[i].a_who; /* * Make sure ACE is valid */ if (zfs_ace_valid(obj_type, aclp, aceptr->z_type, aceptr->z_flags) != B_TRUE) return (SET_ERROR(EINVAL)); } *size = (caddr_t)aceptr - (caddr_t)z_acl; return (0); } /* * convert old ACL format to new */ void zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp, cred_t *cr) { zfs_oldace_t *oldaclp; int i; uint16_t type, iflags; uint32_t access_mask; uint64_t who; void *cookie = NULL; zfs_acl_node_t *newaclnode; ASSERT(aclp->z_version == ZFS_ACL_VERSION_INITIAL); /* * First create the ACE in a contiguous piece of memory * for zfs_copy_ace_2_fuid(). * * We only convert an ACL once, so this won't happen * everytime. */ oldaclp = kmem_alloc(sizeof (zfs_oldace_t) * aclp->z_acl_count, KM_SLEEP); i = 0; while ((cookie = zfs_acl_next_ace(aclp, cookie, &who, &access_mask, &iflags, &type))) { oldaclp[i].z_flags = iflags; oldaclp[i].z_type = type; oldaclp[i].z_fuid = who; oldaclp[i++].z_access_mask = access_mask; } newaclnode = zfs_acl_node_alloc(aclp->z_acl_count * sizeof (zfs_object_ace_t)); aclp->z_ops = &zfs_acl_fuid_ops; VERIFY(zfs_copy_ace_2_fuid(zp->z_zfsvfs, ZTOV(zp)->v_type, aclp, oldaclp, newaclnode->z_acldata, aclp->z_acl_count, &newaclnode->z_size, NULL, cr) == 0); newaclnode->z_ace_count = aclp->z_acl_count; aclp->z_version = ZFS_ACL_VERSION; kmem_free(oldaclp, aclp->z_acl_count * sizeof (zfs_oldace_t)); /* * Release all previous ACL nodes */ zfs_acl_release_nodes(aclp); list_insert_head(&aclp->z_acl, newaclnode); aclp->z_acl_bytes = newaclnode->z_size; aclp->z_acl_count = newaclnode->z_ace_count; } /* * Convert unix access mask to v4 access mask */ static uint32_t zfs_unix_to_v4(uint32_t access_mask) { uint32_t new_mask = 0; if (access_mask & S_IXOTH) new_mask |= ACE_EXECUTE; if (access_mask & S_IWOTH) new_mask |= ACE_WRITE_DATA; if (access_mask & S_IROTH) new_mask |= ACE_READ_DATA; return (new_mask); } static void zfs_set_ace(zfs_acl_t *aclp, void *acep, uint32_t access_mask, uint16_t access_type, uint64_t fuid, uint16_t entry_type) { uint16_t type = entry_type & ACE_TYPE_FLAGS; aclp->z_ops->ace_mask_set(acep, access_mask); aclp->z_ops->ace_type_set(acep, access_type); aclp->z_ops->ace_flags_set(acep, entry_type); if ((type != ACE_OWNER && type != OWNING_GROUP && type != ACE_EVERYONE)) aclp->z_ops->ace_who_set(acep, fuid); } /* * Determine mode of file based on ACL. */ uint64_t zfs_mode_compute(uint64_t fmode, zfs_acl_t *aclp, uint64_t *pflags, uint64_t fuid, uint64_t fgid) { int entry_type; mode_t mode; mode_t seen = 0; zfs_ace_hdr_t *acep = NULL; uint64_t who; uint16_t iflags, type; uint32_t access_mask; boolean_t an_exec_denied = B_FALSE; mode = (fmode & (S_IFMT | S_ISUID | S_ISGID | S_ISVTX)); while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask, &iflags, &type))) { if (!zfs_acl_valid_ace_type(type, iflags)) continue; entry_type = (iflags & ACE_TYPE_FLAGS); /* * Skip over any inherit_only ACEs */ if (iflags & ACE_INHERIT_ONLY_ACE) continue; if (entry_type == ACE_OWNER || (entry_type == 0 && who == fuid)) { if ((access_mask & ACE_READ_DATA) && (!(seen & S_IRUSR))) { seen |= S_IRUSR; if (type == ALLOW) { mode |= S_IRUSR; } } if ((access_mask & ACE_WRITE_DATA) && (!(seen & S_IWUSR))) { seen |= S_IWUSR; if (type == ALLOW) { mode |= S_IWUSR; } } if ((access_mask & ACE_EXECUTE) && (!(seen & S_IXUSR))) { seen |= S_IXUSR; if (type == ALLOW) { mode |= S_IXUSR; } } } else if (entry_type == OWNING_GROUP || (entry_type == ACE_IDENTIFIER_GROUP && who == fgid)) { if ((access_mask & ACE_READ_DATA) && (!(seen & S_IRGRP))) { seen |= S_IRGRP; if (type == ALLOW) { mode |= S_IRGRP; } } if ((access_mask & ACE_WRITE_DATA) && (!(seen & S_IWGRP))) { seen |= S_IWGRP; if (type == ALLOW) { mode |= S_IWGRP; } } if ((access_mask & ACE_EXECUTE) && (!(seen & S_IXGRP))) { seen |= S_IXGRP; if (type == ALLOW) { mode |= S_IXGRP; } } } else if (entry_type == ACE_EVERYONE) { if ((access_mask & ACE_READ_DATA)) { if (!(seen & S_IRUSR)) { seen |= S_IRUSR; if (type == ALLOW) { mode |= S_IRUSR; } } if (!(seen & S_IRGRP)) { seen |= S_IRGRP; if (type == ALLOW) { mode |= S_IRGRP; } } if (!(seen & S_IROTH)) { seen |= S_IROTH; if (type == ALLOW) { mode |= S_IROTH; } } } if ((access_mask & ACE_WRITE_DATA)) { if (!(seen & S_IWUSR)) { seen |= S_IWUSR; if (type == ALLOW) { mode |= S_IWUSR; } } if (!(seen & S_IWGRP)) { seen |= S_IWGRP; if (type == ALLOW) { mode |= S_IWGRP; } } if (!(seen & S_IWOTH)) { seen |= S_IWOTH; if (type == ALLOW) { mode |= S_IWOTH; } } } if ((access_mask & ACE_EXECUTE)) { if (!(seen & S_IXUSR)) { seen |= S_IXUSR; if (type == ALLOW) { mode |= S_IXUSR; } } if (!(seen & S_IXGRP)) { seen |= S_IXGRP; if (type == ALLOW) { mode |= S_IXGRP; } } if (!(seen & S_IXOTH)) { seen |= S_IXOTH; if (type == ALLOW) { mode |= S_IXOTH; } } } } else { /* * Only care if this IDENTIFIER_GROUP or * USER ACE denies execute access to someone, * mode is not affected */ if ((access_mask & ACE_EXECUTE) && type == DENY) an_exec_denied = B_TRUE; } } /* * Failure to allow is effectively a deny, so execute permission * is denied if it was never mentioned or if we explicitly * weren't allowed it. */ if (!an_exec_denied && ((seen & ALL_MODE_EXECS) != ALL_MODE_EXECS || (mode & ALL_MODE_EXECS) != ALL_MODE_EXECS)) an_exec_denied = B_TRUE; if (an_exec_denied) *pflags &= ~ZFS_NO_EXECS_DENIED; else *pflags |= ZFS_NO_EXECS_DENIED; return (mode); } /* * Read an external acl object. If the intent is to modify, always * create a new acl and leave any cached acl in place. */ int zfs_acl_node_read(znode_t *zp, boolean_t have_lock, zfs_acl_t **aclpp, boolean_t will_modify) { zfs_acl_t *aclp; int aclsize; int acl_count; zfs_acl_node_t *aclnode; zfs_acl_phys_t znode_acl; int version; int error; ASSERT(MUTEX_HELD(&zp->z_acl_lock)); if (zp->z_zfsvfs->z_replay == B_FALSE) ASSERT_VOP_LOCKED(ZTOV(zp), __func__); if (zp->z_acl_cached && !will_modify) { *aclpp = zp->z_acl_cached; return (0); } version = zfs_znode_acl_version(zp); if ((error = zfs_acl_znode_info(zp, &aclsize, &acl_count, &znode_acl)) != 0) { goto done; } aclp = zfs_acl_alloc(version); aclp->z_acl_count = acl_count; aclp->z_acl_bytes = aclsize; aclnode = zfs_acl_node_alloc(aclsize); aclnode->z_ace_count = aclp->z_acl_count; aclnode->z_size = aclsize; if (!zp->z_is_sa) { if (znode_acl.z_acl_extern_obj) { error = dmu_read(zp->z_zfsvfs->z_os, znode_acl.z_acl_extern_obj, 0, aclnode->z_size, aclnode->z_acldata, DMU_READ_PREFETCH); } else { bcopy(znode_acl.z_ace_data, aclnode->z_acldata, aclnode->z_size); } } else { error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_ACES(zp->z_zfsvfs), aclnode->z_acldata, aclnode->z_size); } if (error != 0) { zfs_acl_free(aclp); zfs_acl_node_free(aclnode); /* convert checksum errors into IO errors */ if (error == ECKSUM) error = SET_ERROR(EIO); goto done; } list_insert_head(&aclp->z_acl, aclnode); *aclpp = aclp; if (!will_modify) zp->z_acl_cached = aclp; done: return (error); } /*ARGSUSED*/ void zfs_acl_data_locator(void **dataptr, uint32_t *length, uint32_t buflen, boolean_t start, void *userdata) { zfs_acl_locator_cb_t *cb = (zfs_acl_locator_cb_t *)userdata; if (start) { cb->cb_acl_node = list_head(&cb->cb_aclp->z_acl); } else { cb->cb_acl_node = list_next(&cb->cb_aclp->z_acl, cb->cb_acl_node); } *dataptr = cb->cb_acl_node->z_acldata; *length = cb->cb_acl_node->z_size; } int zfs_acl_chown_setattr(znode_t *zp) { int error; zfs_acl_t *aclp; - if (zp->z_zfsvfs->z_replay == B_FALSE) + if (zp->z_zfsvfs->z_replay == B_FALSE) { ASSERT_VOP_ELOCKED(ZTOV(zp), __func__); + ASSERT_VOP_IN_SEQC(ZTOV(zp)); + } ASSERT(MUTEX_HELD(&zp->z_acl_lock)); - ASSERT_VOP_IN_SEQC(ZTOV(zp)); if ((error = zfs_acl_node_read(zp, B_TRUE, &aclp, B_FALSE)) == 0) zp->z_mode = zfs_mode_compute(zp->z_mode, aclp, &zp->z_pflags, zp->z_uid, zp->z_gid); return (error); } /* * common code for setting ACLs. * * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl. * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's * already checked the acl and knows whether to inherit. */ int zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, dmu_tx_t *tx) { int error; zfsvfs_t *zfsvfs = zp->z_zfsvfs; dmu_object_type_t otype; zfs_acl_locator_cb_t locate = { 0 }; uint64_t mode; sa_bulk_attr_t bulk[5]; uint64_t ctime[2]; int count = 0; zfs_acl_phys_t acl_phys; - ASSERT_VOP_IN_SEQC(ZTOV(zp)); + if (zp->z_zfsvfs->z_replay == B_FALSE) { + ASSERT_VOP_IN_SEQC(ZTOV(zp)); + } mode = zp->z_mode; mode = zfs_mode_compute(mode, aclp, &zp->z_pflags, zp->z_uid, zp->z_gid); zp->z_mode = mode; SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, sizeof (mode)); 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_CTIME(zfsvfs), NULL, &ctime, sizeof (ctime)); if (zp->z_acl_cached) { zfs_acl_free(zp->z_acl_cached); zp->z_acl_cached = NULL; } /* * Upgrade needed? */ if (!zfsvfs->z_use_fuids) { otype = DMU_OT_OLDACL; } else { if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) && (zfsvfs->z_version >= ZPL_VERSION_FUID)) zfs_acl_xform(zp, aclp, cr); ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID); otype = DMU_OT_ACL; } /* * Arrgh, we have to handle old on disk format * as well as newer (preferred) SA format. */ if (zp->z_is_sa) { /* the easy case, just update the ACL attribute */ locate.cb_aclp = aclp; SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_ACES(zfsvfs), zfs_acl_data_locator, &locate, aclp->z_acl_bytes); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_COUNT(zfsvfs), NULL, &aclp->z_acl_count, sizeof (uint64_t)); } else { /* Painful legacy way */ zfs_acl_node_t *aclnode; uint64_t off = 0; uint64_t aoid; if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zfsvfs), &acl_phys, sizeof (acl_phys))) != 0) return (error); aoid = acl_phys.z_acl_extern_obj; if (aclp->z_acl_bytes > ZFS_ACE_SPACE) { /* * If ACL was previously external and we are now * converting to new ACL format then release old * ACL object and create a new one. */ if (aoid && aclp->z_version != acl_phys.z_acl_version) { error = dmu_object_free(zfsvfs->z_os, aoid, tx); if (error) return (error); aoid = 0; } if (aoid == 0) { aoid = dmu_object_alloc(zfsvfs->z_os, otype, aclp->z_acl_bytes, otype == DMU_OT_ACL ? DMU_OT_SYSACL : DMU_OT_NONE, otype == DMU_OT_ACL ? DN_OLD_MAX_BONUSLEN : 0, tx); } else { (void) dmu_object_set_blocksize(zfsvfs->z_os, aoid, aclp->z_acl_bytes, 0, tx); } acl_phys.z_acl_extern_obj = aoid; for (aclnode = list_head(&aclp->z_acl); aclnode; aclnode = list_next(&aclp->z_acl, aclnode)) { if (aclnode->z_ace_count == 0) continue; dmu_write(zfsvfs->z_os, aoid, off, aclnode->z_size, aclnode->z_acldata, tx); off += aclnode->z_size; } } else { void *start = acl_phys.z_ace_data; /* * Migrating back embedded? */ if (acl_phys.z_acl_extern_obj) { error = dmu_object_free(zfsvfs->z_os, acl_phys.z_acl_extern_obj, tx); if (error) return (error); acl_phys.z_acl_extern_obj = 0; } for (aclnode = list_head(&aclp->z_acl); aclnode; aclnode = list_next(&aclp->z_acl, aclnode)) { if (aclnode->z_ace_count == 0) continue; bcopy(aclnode->z_acldata, start, aclnode->z_size); start = (caddr_t)start + aclnode->z_size; } } /* * If Old version then swap count/bytes to match old * layout of znode_acl_phys_t. */ if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) { acl_phys.z_acl_size = aclp->z_acl_count; acl_phys.z_acl_count = aclp->z_acl_bytes; } else { acl_phys.z_acl_size = aclp->z_acl_bytes; acl_phys.z_acl_count = aclp->z_acl_count; } acl_phys.z_acl_version = aclp->z_version; SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL, &acl_phys, sizeof (acl_phys)); } /* * Replace ACL wide bits, but first clear them. */ zp->z_pflags &= ~ZFS_ACL_WIDE_FLAGS; zp->z_pflags |= aclp->z_hints; if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0) zp->z_pflags |= ZFS_ACL_TRIVIAL; zfs_tstamp_update_setup(zp, STATE_CHANGED, NULL, ctime); return (sa_bulk_update(zp->z_sa_hdl, bulk, count, tx)); } static void zfs_acl_chmod(vtype_t vtype, uint64_t mode, boolean_t split, boolean_t trim, zfs_acl_t *aclp) { void *acep = NULL; uint64_t who; int new_count, new_bytes; int ace_size; int entry_type; uint16_t iflags, type; uint32_t access_mask; zfs_acl_node_t *newnode; size_t abstract_size = aclp->z_ops->ace_abstract_size(); void *zacep; boolean_t isdir; trivial_acl_t masks; new_count = new_bytes = 0; isdir = (vtype == VDIR); acl_trivial_access_masks((mode_t)mode, isdir, &masks); newnode = zfs_acl_node_alloc((abstract_size * 6) + aclp->z_acl_bytes); zacep = newnode->z_acldata; if (masks.allow0) { zfs_set_ace(aclp, zacep, masks.allow0, ALLOW, -1, ACE_OWNER); zacep = (void *)((uintptr_t)zacep + abstract_size); new_count++; new_bytes += abstract_size; } if (masks.deny1) { zfs_set_ace(aclp, zacep, masks.deny1, DENY, -1, ACE_OWNER); zacep = (void *)((uintptr_t)zacep + abstract_size); new_count++; new_bytes += abstract_size; } if (masks.deny2) { zfs_set_ace(aclp, zacep, masks.deny2, DENY, -1, OWNING_GROUP); zacep = (void *)((uintptr_t)zacep + abstract_size); new_count++; new_bytes += abstract_size; } while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask, &iflags, &type))) { entry_type = (iflags & ACE_TYPE_FLAGS); /* * ACEs used to represent the file mode may be divided * into an equivalent pair of inherit-only and regular * ACEs, if they are inheritable. * Skip regular ACEs, which are replaced by the new mode. */ if (split && (entry_type == ACE_OWNER || entry_type == OWNING_GROUP || entry_type == ACE_EVERYONE)) { if (!isdir || !(iflags & (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE))) continue; /* * We preserve owner@, group@, or @everyone * permissions, if they are inheritable, by * copying them to inherit_only ACEs. This * prevents inheritable permissions from being * altered along with the file mode. */ iflags |= ACE_INHERIT_ONLY_ACE; } /* * If this ACL has any inheritable ACEs, mark that in * the hints (which are later masked into the pflags) * so create knows to do inheritance. */ if (isdir && (iflags & (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE))) aclp->z_hints |= ZFS_INHERIT_ACE; if ((type != ALLOW && type != DENY) || (iflags & ACE_INHERIT_ONLY_ACE)) { switch (type) { case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: aclp->z_hints |= ZFS_ACL_OBJ_ACE; break; } } else { /* * Limit permissions granted by ACEs to be no greater * than permissions of the requested group mode. * Applies when the "aclmode" property is set to * "groupmask". */ if ((type == ALLOW) && trim) access_mask &= masks.group; } zfs_set_ace(aclp, zacep, access_mask, type, who, iflags); ace_size = aclp->z_ops->ace_size(acep); zacep = (void *)((uintptr_t)zacep + ace_size); new_count++; new_bytes += ace_size; } zfs_set_ace(aclp, zacep, masks.owner, ALLOW, -1, ACE_OWNER); zacep = (void *)((uintptr_t)zacep + abstract_size); zfs_set_ace(aclp, zacep, masks.group, ALLOW, -1, OWNING_GROUP); zacep = (void *)((uintptr_t)zacep + abstract_size); zfs_set_ace(aclp, zacep, masks.everyone, ALLOW, -1, ACE_EVERYONE); new_count += 3; new_bytes += abstract_size * 3; zfs_acl_release_nodes(aclp); aclp->z_acl_count = new_count; aclp->z_acl_bytes = new_bytes; newnode->z_ace_count = new_count; newnode->z_size = new_bytes; list_insert_tail(&aclp->z_acl, newnode); } int zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode) { int error = 0; mutex_enter(&zp->z_acl_lock); if (zp->z_zfsvfs->z_replay == B_FALSE) ASSERT_VOP_ELOCKED(ZTOV(zp), __func__); if (zp->z_zfsvfs->z_acl_mode == ZFS_ACL_DISCARD) *aclp = zfs_acl_alloc(zfs_acl_version_zp(zp)); else error = zfs_acl_node_read(zp, B_TRUE, aclp, B_TRUE); if (error == 0) { (*aclp)->z_hints = zp->z_pflags & V4_ACL_WIDE_FLAGS; zfs_acl_chmod(ZTOV(zp)->v_type, mode, B_TRUE, (zp->z_zfsvfs->z_acl_mode == ZFS_ACL_GROUPMASK), *aclp); } mutex_exit(&zp->z_acl_lock); return (error); } /* * Should ACE be inherited? */ static int zfs_ace_can_use(vtype_t vtype, uint16_t acep_flags) { int iflags = (acep_flags & 0xf); if ((vtype == VDIR) && (iflags & ACE_DIRECTORY_INHERIT_ACE)) return (1); else if (iflags & ACE_FILE_INHERIT_ACE) return (!((vtype == VDIR) && (iflags & ACE_NO_PROPAGATE_INHERIT_ACE))); return (0); } /* * inherit inheritable ACEs from parent */ static zfs_acl_t * zfs_acl_inherit(zfsvfs_t *zfsvfs, vtype_t vtype, zfs_acl_t *paclp, uint64_t mode, boolean_t *need_chmod) { void *pacep = NULL; void *acep; zfs_acl_node_t *aclnode; zfs_acl_t *aclp = NULL; uint64_t who; uint32_t access_mask; uint16_t iflags, newflags, type; size_t ace_size; void *data1, *data2; size_t data1sz, data2sz; uint_t aclinherit; boolean_t isdir = (vtype == VDIR); boolean_t isreg = (vtype == VREG); *need_chmod = B_TRUE; aclp = zfs_acl_alloc(paclp->z_version); aclinherit = zfsvfs->z_acl_inherit; if (aclinherit == ZFS_ACL_DISCARD || vtype == VLNK) return (aclp); while ((pacep = zfs_acl_next_ace(paclp, pacep, &who, &access_mask, &iflags, &type))) { /* * don't inherit bogus ACEs */ if (!zfs_acl_valid_ace_type(type, iflags)) continue; /* * Check if ACE is inheritable by this vnode */ if ((aclinherit == ZFS_ACL_NOALLOW && type == ALLOW) || !zfs_ace_can_use(vtype, iflags)) continue; /* * If owner@, group@, or everyone@ inheritable * then zfs_acl_chmod() isn't needed. */ if ((aclinherit == ZFS_ACL_PASSTHROUGH || aclinherit == ZFS_ACL_PASSTHROUGH_X) && ((iflags & (ACE_OWNER|ACE_EVERYONE)) || ((iflags & OWNING_GROUP) == OWNING_GROUP)) && (isreg || (isdir && (iflags & ACE_DIRECTORY_INHERIT_ACE)))) *need_chmod = B_FALSE; /* * Strip inherited execute permission from file if * not in mode */ if (aclinherit == ZFS_ACL_PASSTHROUGH_X && type == ALLOW && !isdir && ((mode & (S_IXUSR|S_IXGRP|S_IXOTH)) == 0)) { access_mask &= ~ACE_EXECUTE; } /* * Strip write_acl and write_owner from permissions * when inheriting an ACE */ if (aclinherit == ZFS_ACL_RESTRICTED && type == ALLOW) { access_mask &= ~RESTRICTED_CLEAR; } ace_size = aclp->z_ops->ace_size(pacep); aclnode = zfs_acl_node_alloc(ace_size); list_insert_tail(&aclp->z_acl, aclnode); acep = aclnode->z_acldata; zfs_set_ace(aclp, acep, access_mask, type, who, iflags|ACE_INHERITED_ACE); /* * Copy special opaque data if any */ if ((data1sz = paclp->z_ops->ace_data(pacep, &data1)) != 0) { VERIFY((data2sz = aclp->z_ops->ace_data(acep, &data2)) == data1sz); bcopy(data1, data2, data2sz); } aclp->z_acl_count++; aclnode->z_ace_count++; aclp->z_acl_bytes += aclnode->z_size; newflags = aclp->z_ops->ace_flags_get(acep); /* * If ACE is not to be inherited further, or if the vnode is * not a directory, remove all inheritance flags */ if (!isdir || (iflags & ACE_NO_PROPAGATE_INHERIT_ACE)) { newflags &= ~ALL_INHERIT; aclp->z_ops->ace_flags_set(acep, newflags|ACE_INHERITED_ACE); continue; } /* * This directory has an inheritable ACE */ aclp->z_hints |= ZFS_INHERIT_ACE; /* * If only FILE_INHERIT is set then turn on * inherit_only */ if ((iflags & (ACE_FILE_INHERIT_ACE | ACE_DIRECTORY_INHERIT_ACE)) == ACE_FILE_INHERIT_ACE) { newflags |= ACE_INHERIT_ONLY_ACE; aclp->z_ops->ace_flags_set(acep, newflags|ACE_INHERITED_ACE); } else { newflags &= ~ACE_INHERIT_ONLY_ACE; aclp->z_ops->ace_flags_set(acep, newflags|ACE_INHERITED_ACE); } } if (zfsvfs->z_acl_mode == ZFS_ACL_RESTRICTED && aclp->z_acl_count != 0) { *need_chmod = B_FALSE; } return (aclp); } /* * Create file system object initial permissions * including inheritable ACEs. * Also, create FUIDs for owner and group. */ int zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr, vsecattr_t *vsecp, zfs_acl_ids_t *acl_ids) { int error; zfsvfs_t *zfsvfs = dzp->z_zfsvfs; zfs_acl_t *paclp; gid_t gid; boolean_t need_chmod = B_TRUE; boolean_t trim = B_FALSE; boolean_t inherited = B_FALSE; if ((flag & IS_ROOT_NODE) == 0) { if (zfsvfs->z_replay == B_FALSE) ASSERT_VOP_ELOCKED(ZTOV(dzp), __func__); } else ASSERT(dzp->z_vnode == NULL); bzero(acl_ids, sizeof (zfs_acl_ids_t)); acl_ids->z_mode = MAKEIMODE(vap->va_type, vap->va_mode); if (vsecp) if ((error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, cr, &acl_ids->z_fuidp, &acl_ids->z_aclp)) != 0) return (error); /* * Determine uid and gid. */ if ((flag & IS_ROOT_NODE) || zfsvfs->z_replay || ((flag & IS_XATTR) && (vap->va_type == VDIR))) { acl_ids->z_fuid = zfs_fuid_create(zfsvfs, (uint64_t)vap->va_uid, cr, ZFS_OWNER, &acl_ids->z_fuidp); acl_ids->z_fgid = zfs_fuid_create(zfsvfs, (uint64_t)vap->va_gid, cr, ZFS_GROUP, &acl_ids->z_fuidp); gid = vap->va_gid; } else { acl_ids->z_fuid = zfs_fuid_create_cred(zfsvfs, ZFS_OWNER, cr, &acl_ids->z_fuidp); acl_ids->z_fgid = 0; if (vap->va_mask & AT_GID) { acl_ids->z_fgid = zfs_fuid_create(zfsvfs, (uint64_t)vap->va_gid, cr, ZFS_GROUP, &acl_ids->z_fuidp); gid = vap->va_gid; if (acl_ids->z_fgid != dzp->z_gid && !groupmember(vap->va_gid, cr) && secpolicy_vnode_create_gid(cr) != 0) acl_ids->z_fgid = 0; } if (acl_ids->z_fgid == 0) { char *domain; uint32_t rid; acl_ids->z_fgid = dzp->z_gid; gid = zfs_fuid_map_id(zfsvfs, acl_ids->z_fgid, cr, ZFS_GROUP); if (zfsvfs->z_use_fuids && IS_EPHEMERAL(acl_ids->z_fgid)) { domain = zfs_fuid_idx_domain(&zfsvfs->z_fuid_idx, FUID_INDEX(acl_ids->z_fgid)); rid = FUID_RID(acl_ids->z_fgid); zfs_fuid_node_add(&acl_ids->z_fuidp, domain, rid, FUID_INDEX(acl_ids->z_fgid), acl_ids->z_fgid, ZFS_GROUP); } } } /* * If we're creating a directory, and the parent directory has the * set-GID bit set, set in on the new directory. * Otherwise, if the user is neither privileged nor a member of the * file's new group, clear the file's set-GID bit. */ if (!(flag & IS_ROOT_NODE) && (dzp->z_mode & S_ISGID) && (vap->va_type == VDIR)) { acl_ids->z_mode |= S_ISGID; } else { if ((acl_ids->z_mode & S_ISGID) && secpolicy_vnode_setids_setgids(ZTOV(dzp), cr, gid) != 0) acl_ids->z_mode &= ~S_ISGID; } if (acl_ids->z_aclp == NULL) { mutex_enter(&dzp->z_acl_lock); if (!(flag & IS_ROOT_NODE) && (dzp->z_pflags & ZFS_INHERIT_ACE) && !(dzp->z_pflags & ZFS_XATTR)) { VERIFY0(zfs_acl_node_read(dzp, B_TRUE, &paclp, B_FALSE)); acl_ids->z_aclp = zfs_acl_inherit(zfsvfs, vap->va_type, paclp, acl_ids->z_mode, &need_chmod); inherited = B_TRUE; } else { acl_ids->z_aclp = zfs_acl_alloc(zfs_acl_version_zp(dzp)); acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL; } mutex_exit(&dzp->z_acl_lock); if (need_chmod) { if (vap->va_type == VDIR) acl_ids->z_aclp->z_hints |= ZFS_ACL_AUTO_INHERIT; if (zfsvfs->z_acl_mode == ZFS_ACL_GROUPMASK && zfsvfs->z_acl_inherit != ZFS_ACL_PASSTHROUGH && zfsvfs->z_acl_inherit != ZFS_ACL_PASSTHROUGH_X) trim = B_TRUE; zfs_acl_chmod(vap->va_type, acl_ids->z_mode, B_FALSE, trim, acl_ids->z_aclp); } } if (inherited || vsecp) { acl_ids->z_mode = zfs_mode_compute(acl_ids->z_mode, acl_ids->z_aclp, &acl_ids->z_aclp->z_hints, acl_ids->z_fuid, acl_ids->z_fgid); if (ace_trivial_common(acl_ids->z_aclp, 0, zfs_ace_walk) == 0) acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL; } return (0); } /* * Free ACL and fuid_infop, but not the acl_ids structure */ void zfs_acl_ids_free(zfs_acl_ids_t *acl_ids) { if (acl_ids->z_aclp) zfs_acl_free(acl_ids->z_aclp); if (acl_ids->z_fuidp) zfs_fuid_info_free(acl_ids->z_fuidp); acl_ids->z_aclp = NULL; acl_ids->z_fuidp = NULL; } boolean_t zfs_acl_ids_overquota(zfsvfs_t *zv, zfs_acl_ids_t *acl_ids, uint64_t projid) { return (zfs_id_overquota(zv, DMU_USERUSED_OBJECT, acl_ids->z_fuid) || zfs_id_overquota(zv, DMU_GROUPUSED_OBJECT, acl_ids->z_fgid) || (projid != ZFS_DEFAULT_PROJID && projid != ZFS_INVALID_PROJID && zfs_id_overquota(zv, DMU_PROJECTUSED_OBJECT, projid))); } /* * Retrieve a file's ACL */ int zfs_getacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr) { zfs_acl_t *aclp; ulong_t mask; int error; int count = 0; int largeace = 0; mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT | VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES); if (mask == 0) return (SET_ERROR(ENOSYS)); if ((error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr))) return (error); mutex_enter(&zp->z_acl_lock); if (zp->z_zfsvfs->z_replay == B_FALSE) ASSERT_VOP_LOCKED(ZTOV(zp), __func__); error = zfs_acl_node_read(zp, B_TRUE, &aclp, B_FALSE); if (error != 0) { mutex_exit(&zp->z_acl_lock); return (error); } /* * Scan ACL to determine number of ACEs */ if ((zp->z_pflags & ZFS_ACL_OBJ_ACE) && !(mask & VSA_ACE_ALLTYPES)) { void *zacep = NULL; uint64_t who; uint32_t access_mask; uint16_t type, iflags; while ((zacep = zfs_acl_next_ace(aclp, zacep, &who, &access_mask, &iflags, &type))) { switch (type) { case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: largeace++; continue; default: count++; } } vsecp->vsa_aclcnt = count; } else count = (int)aclp->z_acl_count; if (mask & VSA_ACECNT) { vsecp->vsa_aclcnt = count; } if (mask & VSA_ACE) { size_t aclsz; aclsz = count * sizeof (ace_t) + sizeof (ace_object_t) * largeace; vsecp->vsa_aclentp = kmem_alloc(aclsz, KM_SLEEP); vsecp->vsa_aclentsz = aclsz; if (aclp->z_version == ZFS_ACL_VERSION_FUID) zfs_copy_fuid_2_ace(zp->z_zfsvfs, aclp, cr, vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES)); else { zfs_acl_node_t *aclnode; void *start = vsecp->vsa_aclentp; for (aclnode = list_head(&aclp->z_acl); aclnode; aclnode = list_next(&aclp->z_acl, aclnode)) { bcopy(aclnode->z_acldata, start, aclnode->z_size); start = (caddr_t)start + aclnode->z_size; } ASSERT((caddr_t)start - (caddr_t)vsecp->vsa_aclentp == aclp->z_acl_bytes); } } if (mask & VSA_ACE_ACLFLAGS) { vsecp->vsa_aclflags = 0; if (zp->z_pflags & ZFS_ACL_DEFAULTED) vsecp->vsa_aclflags |= ACL_DEFAULTED; if (zp->z_pflags & ZFS_ACL_PROTECTED) vsecp->vsa_aclflags |= ACL_PROTECTED; if (zp->z_pflags & ZFS_ACL_AUTO_INHERIT) vsecp->vsa_aclflags |= ACL_AUTO_INHERIT; } mutex_exit(&zp->z_acl_lock); return (0); } int zfs_vsec_2_aclp(zfsvfs_t *zfsvfs, umode_t obj_type, vsecattr_t *vsecp, cred_t *cr, zfs_fuid_info_t **fuidp, zfs_acl_t **zaclp) { zfs_acl_t *aclp; zfs_acl_node_t *aclnode; int aclcnt = vsecp->vsa_aclcnt; int error; if (vsecp->vsa_aclcnt > MAX_ACL_ENTRIES || vsecp->vsa_aclcnt <= 0) return (SET_ERROR(EINVAL)); aclp = zfs_acl_alloc(zfs_acl_version(zfsvfs->z_version)); aclp->z_hints = 0; aclnode = zfs_acl_node_alloc(aclcnt * sizeof (zfs_object_ace_t)); if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) { if ((error = zfs_copy_ace_2_oldace(obj_type, aclp, (ace_t *)vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt, &aclnode->z_size)) != 0) { zfs_acl_free(aclp); zfs_acl_node_free(aclnode); return (error); } } else { if ((error = zfs_copy_ace_2_fuid(zfsvfs, obj_type, aclp, vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt, &aclnode->z_size, fuidp, cr)) != 0) { zfs_acl_free(aclp); zfs_acl_node_free(aclnode); return (error); } } aclp->z_acl_bytes = aclnode->z_size; aclnode->z_ace_count = aclcnt; aclp->z_acl_count = aclcnt; list_insert_head(&aclp->z_acl, aclnode); /* * If flags are being set then add them to z_hints */ if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS) { if (vsecp->vsa_aclflags & ACL_PROTECTED) aclp->z_hints |= ZFS_ACL_PROTECTED; if (vsecp->vsa_aclflags & ACL_DEFAULTED) aclp->z_hints |= ZFS_ACL_DEFAULTED; if (vsecp->vsa_aclflags & ACL_AUTO_INHERIT) aclp->z_hints |= ZFS_ACL_AUTO_INHERIT; } *zaclp = aclp; return (0); } /* * Set a file's ACL */ int zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr) { zfsvfs_t *zfsvfs = zp->z_zfsvfs; zilog_t *zilog = zfsvfs->z_log; ulong_t mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT); dmu_tx_t *tx; int error; zfs_acl_t *aclp; zfs_fuid_info_t *fuidp = NULL; boolean_t fuid_dirtied; uint64_t acl_obj; if (zp->z_zfsvfs->z_replay == B_FALSE) ASSERT_VOP_ELOCKED(ZTOV(zp), __func__); if (mask == 0) return (SET_ERROR(ENOSYS)); if (zp->z_pflags & ZFS_IMMUTABLE) return (SET_ERROR(EPERM)); if ((error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr))) return (error); error = zfs_vsec_2_aclp(zfsvfs, ZTOV(zp)->v_type, vsecp, cr, &fuidp, &aclp); if (error) return (error); /* * If ACL wide flags aren't being set then preserve any * existing flags. */ if (!(vsecp->vsa_mask & VSA_ACE_ACLFLAGS)) { aclp->z_hints |= (zp->z_pflags & V4_ACL_WIDE_FLAGS); } top: mutex_enter(&zp->z_acl_lock); tx = dmu_tx_create(zfsvfs->z_os); dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); fuid_dirtied = zfsvfs->z_fuid_dirty; if (fuid_dirtied) zfs_fuid_txhold(zfsvfs, tx); /* * If old version and ACL won't fit in bonus and we aren't * upgrading then take out necessary DMU holds */ if ((acl_obj = zfs_external_acl(zp)) != 0) { if (zfsvfs->z_version >= ZPL_VERSION_FUID && zfs_znode_acl_version(zp) <= ZFS_ACL_VERSION_INITIAL) { dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END); dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes); } else { dmu_tx_hold_write(tx, acl_obj, 0, aclp->z_acl_bytes); } } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) { dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes); } zfs_sa_upgrade_txholds(tx, zp); error = dmu_tx_assign(tx, TXG_NOWAIT); if (error) { mutex_exit(&zp->z_acl_lock); if (error == ERESTART) { dmu_tx_wait(tx); dmu_tx_abort(tx); goto top; } dmu_tx_abort(tx); zfs_acl_free(aclp); return (error); } error = zfs_aclset_common(zp, aclp, cr, tx); ASSERT(error == 0); ASSERT(zp->z_acl_cached == NULL); zp->z_acl_cached = aclp; if (fuid_dirtied) zfs_fuid_sync(zfsvfs, tx); zfs_log_acl(zilog, tx, zp, vsecp, fuidp); if (fuidp) zfs_fuid_info_free(fuidp); dmu_tx_commit(tx); mutex_exit(&zp->z_acl_lock); return (error); } /* * Check accesses of interest (AoI) against attributes of the dataset * such as read-only. Returns zero if no AoI conflict with dataset * attributes, otherwise an appropriate errno is returned. */ static int zfs_zaccess_dataset_check(znode_t *zp, uint32_t v4_mode) { if ((v4_mode & WRITE_MASK) && (zp->z_zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) && (!IS_DEVVP(ZTOV(zp)) || (IS_DEVVP(ZTOV(zp)) && (v4_mode & WRITE_MASK_ATTRS)))) { return (SET_ERROR(EROFS)); } /* * Intentionally allow ZFS_READONLY through here. * See zfs_zaccess_common(). */ if ((v4_mode & WRITE_MASK_DATA) && (zp->z_pflags & ZFS_IMMUTABLE)) { return (SET_ERROR(EPERM)); } /* * In FreeBSD we allow to modify directory's content is ZFS_NOUNLINK * (sunlnk) is set. We just don't allow directory removal, which is * handled in zfs_zaccess_delete(). */ if ((v4_mode & ACE_DELETE) && (zp->z_pflags & ZFS_NOUNLINK)) { return (EPERM); } if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) && (zp->z_pflags & ZFS_AV_QUARANTINED))) { return (SET_ERROR(EACCES)); } return (0); } /* * The primary usage of this function is to loop through all of the * ACEs in the znode, determining what accesses of interest (AoI) to * the caller are allowed or denied. The AoI are expressed as bits in * the working_mode parameter. As each ACE is processed, bits covered * by that ACE are removed from the working_mode. This removal * facilitates two things. The first is that when the working mode is * empty (= 0), we know we've looked at all the AoI. The second is * that the ACE interpretation rules don't allow a later ACE to undo * something granted or denied by an earlier ACE. Removing the * discovered access or denial enforces this rule. At the end of * processing the ACEs, all AoI that were found to be denied are * placed into the working_mode, giving the caller a mask of denied * accesses. Returns: * 0 if all AoI granted * EACCESS if the denied mask is non-zero * other error if abnormal failure (e.g., IO error) * * A secondary usage of the function is to determine if any of the * AoI are granted. If an ACE grants any access in * the working_mode, we immediately short circuit out of the function. * This mode is chosen by setting anyaccess to B_TRUE. The * working_mode is not a denied access mask upon exit if the function * is used in this manner. */ static int zfs_zaccess_aces_check(znode_t *zp, uint32_t *working_mode, boolean_t anyaccess, cred_t *cr) { zfsvfs_t *zfsvfs = zp->z_zfsvfs; zfs_acl_t *aclp; int error; uid_t uid = crgetuid(cr); uint64_t who; uint16_t type, iflags; uint16_t entry_type; uint32_t access_mask; uint32_t deny_mask = 0; zfs_ace_hdr_t *acep = NULL; boolean_t checkit; uid_t gowner; uid_t fowner; zfs_fuid_map_ids(zp, cr, &fowner, &gowner); mutex_enter(&zp->z_acl_lock); if (zp->z_zfsvfs->z_replay == B_FALSE) ASSERT_VOP_LOCKED(ZTOV(zp), __func__); error = zfs_acl_node_read(zp, B_TRUE, &aclp, B_FALSE); if (error != 0) { mutex_exit(&zp->z_acl_lock); return (error); } ASSERT(zp->z_acl_cached); while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask, &iflags, &type))) { uint32_t mask_matched; if (!zfs_acl_valid_ace_type(type, iflags)) continue; if (ZTOV(zp)->v_type == VDIR && (iflags & ACE_INHERIT_ONLY_ACE)) continue; /* Skip ACE if it does not affect any AoI */ mask_matched = (access_mask & *working_mode); if (!mask_matched) continue; entry_type = (iflags & ACE_TYPE_FLAGS); checkit = B_FALSE; switch (entry_type) { case ACE_OWNER: if (uid == fowner) checkit = B_TRUE; break; case OWNING_GROUP: who = gowner; /*FALLTHROUGH*/ case ACE_IDENTIFIER_GROUP: checkit = zfs_groupmember(zfsvfs, who, cr); break; case ACE_EVERYONE: checkit = B_TRUE; break; /* USER Entry */ default: if (entry_type == 0) { uid_t newid; newid = zfs_fuid_map_id(zfsvfs, who, cr, ZFS_ACE_USER); if (newid != UID_NOBODY && uid == newid) checkit = B_TRUE; break; } else { mutex_exit(&zp->z_acl_lock); return (SET_ERROR(EIO)); } } if (checkit) { if (type == DENY) { DTRACE_PROBE3(zfs__ace__denies, znode_t *, zp, zfs_ace_hdr_t *, acep, uint32_t, mask_matched); deny_mask |= mask_matched; } else { DTRACE_PROBE3(zfs__ace__allows, znode_t *, zp, zfs_ace_hdr_t *, acep, uint32_t, mask_matched); if (anyaccess) { mutex_exit(&zp->z_acl_lock); return (0); } } *working_mode &= ~mask_matched; } /* Are we done? */ if (*working_mode == 0) break; } mutex_exit(&zp->z_acl_lock); /* Put the found 'denies' back on the working mode */ if (deny_mask) { *working_mode |= deny_mask; return (SET_ERROR(EACCES)); } else if (*working_mode) { return (-1); } return (0); } /* * Return true if any access whatsoever granted, we don't actually * care what access is granted. */ boolean_t zfs_has_access(znode_t *zp, cred_t *cr) { uint32_t have = ACE_ALL_PERMS; if (zfs_zaccess_aces_check(zp, &have, B_TRUE, cr) != 0) { uid_t owner; owner = zfs_fuid_map_id(zp->z_zfsvfs, zp->z_uid, cr, ZFS_OWNER); return (secpolicy_vnode_any_access(cr, ZTOV(zp), owner) == 0); } return (B_TRUE); } static int zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode, boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr) { zfsvfs_t *zfsvfs = zp->z_zfsvfs; int err; *working_mode = v4_mode; *check_privs = B_TRUE; /* * Short circuit empty requests */ if (v4_mode == 0 || zfsvfs->z_replay) { *working_mode = 0; return (0); } if ((err = zfs_zaccess_dataset_check(zp, v4_mode)) != 0) { *check_privs = B_FALSE; return (err); } /* * The caller requested that the ACL check be skipped. This * would only happen if the caller checked VOP_ACCESS() with a * 32 bit ACE mask and already had the appropriate permissions. */ if (skipaclchk) { *working_mode = 0; return (0); } /* * Note: ZFS_READONLY represents the "DOS R/O" attribute. * When that flag is set, we should behave as if write access * were not granted by anything in the ACL. In particular: * We _must_ allow writes after opening the file r/w, then * setting the DOS R/O attribute, and writing some more. * (Similar to how you can write after fchmod(fd, 0444).) * * Therefore ZFS_READONLY is ignored in the dataset check * above, and checked here as if part of the ACL check. * Also note: DOS R/O is ignored for directories. */ if ((v4_mode & WRITE_MASK_DATA) && (ZTOV(zp)->v_type != VDIR) && (zp->z_pflags & ZFS_READONLY)) { return (SET_ERROR(EPERM)); } return (zfs_zaccess_aces_check(zp, working_mode, B_FALSE, cr)); } static int zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs, cred_t *cr) { if (*working_mode != ACE_WRITE_DATA) return (SET_ERROR(EACCES)); return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode, check_privs, B_FALSE, cr)); } /* * Check if VEXEC is allowed. * * This routine is based on zfs_fastaccesschk_execute which has slowpath * calling zfs_zaccess. This would be incorrect on FreeBSD (see * zfs_freebsd_access for the difference). Thus this variant let's the * caller handle the slowpath (if necessary). * * On top of that we perform a lockless check for ZFS_NO_EXECS_DENIED. * * Safe access to znode_t is provided by the vnode lock. */ int zfs_fastaccesschk_execute(znode_t *zdp, cred_t *cr) { boolean_t is_attr; if (zdp->z_pflags & ZFS_AV_QUARANTINED) return (1); is_attr = ((zdp->z_pflags & ZFS_XATTR) && (ZTOV(zdp)->v_type == VDIR)); if (is_attr) return (1); if (zdp->z_pflags & ZFS_NO_EXECS_DENIED) return (0); return (1); } /* * Determine whether Access should be granted/denied. * * The least priv subsystem is always consulted as a basic privilege * can define any form of access. */ int zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr) { uint32_t working_mode; int error; int is_attr; boolean_t check_privs; znode_t *xzp = NULL; znode_t *check_zp = zp; mode_t needed_bits; uid_t owner; is_attr = ((zp->z_pflags & ZFS_XATTR) && (ZTOV(zp)->v_type == VDIR)); #ifdef __FreeBSD_kernel__ /* * In FreeBSD, we don't care about permissions of individual ADS. * Note that not checking them is not just an optimization - without * this shortcut, EA operations may bogusly fail with EACCES. */ if (zp->z_pflags & ZFS_XATTR) return (0); #else /* * If attribute then validate against base file */ if (is_attr) { uint64_t parent; if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(zp->z_zfsvfs), &parent, sizeof (parent))) != 0) return (error); if ((error = zfs_zget(zp->z_zfsvfs, parent, &xzp)) != 0) { return (error); } check_zp = xzp; /* * fixup mode to map to xattr perms */ if (mode & (ACE_WRITE_DATA|ACE_APPEND_DATA)) { mode &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA); mode |= ACE_WRITE_NAMED_ATTRS; } if (mode & (ACE_READ_DATA|ACE_EXECUTE)) { mode &= ~(ACE_READ_DATA|ACE_EXECUTE); mode |= ACE_READ_NAMED_ATTRS; } } #endif owner = zfs_fuid_map_id(zp->z_zfsvfs, zp->z_uid, cr, ZFS_OWNER); /* * Map the bits required to the standard vnode flags VREAD|VWRITE|VEXEC * in needed_bits. Map the bits mapped by working_mode (currently * missing) in missing_bits. * Call secpolicy_vnode_access2() with (needed_bits & ~checkmode), * needed_bits. */ needed_bits = 0; working_mode = mode; if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES)) && owner == crgetuid(cr)) working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES); if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS| ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE)) needed_bits |= VREAD; if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS| ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE)) needed_bits |= VWRITE; if (working_mode & ACE_EXECUTE) needed_bits |= VEXEC; if ((error = zfs_zaccess_common(check_zp, mode, &working_mode, &check_privs, skipaclchk, cr)) == 0) { if (is_attr) VN_RELE(ZTOV(xzp)); return (secpolicy_vnode_access2(cr, ZTOV(zp), owner, needed_bits, needed_bits)); } if (error && !check_privs) { if (is_attr) VN_RELE(ZTOV(xzp)); return (error); } if (error && (flags & V_APPEND)) { error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr); } if (error && check_privs) { mode_t checkmode = 0; vnode_t *check_vp = ZTOV(check_zp); /* * First check for implicit owner permission on * read_acl/read_attributes */ error = 0; ASSERT(working_mode != 0); if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES) && owner == crgetuid(cr))) working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES); if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS| ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE)) checkmode |= VREAD; if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS| ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE)) checkmode |= VWRITE; if (working_mode & ACE_EXECUTE) checkmode |= VEXEC; error = secpolicy_vnode_access2(cr, check_vp, owner, needed_bits & ~checkmode, needed_bits); if (error == 0 && (working_mode & ACE_WRITE_OWNER)) error = secpolicy_vnode_chown(check_vp, cr, owner); if (error == 0 && (working_mode & ACE_WRITE_ACL)) error = secpolicy_vnode_setdac(check_vp, cr, owner); if (error == 0 && (working_mode & (ACE_DELETE|ACE_DELETE_CHILD))) error = secpolicy_vnode_remove(check_vp, cr); if (error == 0 && (working_mode & ACE_SYNCHRONIZE)) { error = secpolicy_vnode_chown(check_vp, cr, owner); } if (error == 0) { /* * See if any bits other than those already checked * for are still present. If so then return EACCES */ if (working_mode & ~(ZFS_CHECKED_MASKS)) { error = SET_ERROR(EACCES); } } } else if (error == 0) { error = secpolicy_vnode_access2(cr, ZTOV(zp), owner, needed_bits, needed_bits); } if (is_attr) VN_RELE(ZTOV(xzp)); return (error); } /* * Translate traditional unix VREAD/VWRITE/VEXEC mode into * NFSv4-style ZFS ACL format and call zfs_zaccess() */ int zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr) { return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr)); } /* * Access function for secpolicy_vnode_setattr */ int zfs_zaccess_unix(znode_t *zp, mode_t mode, cred_t *cr) { int v4_mode = zfs_unix_to_v4(mode >> 6); return (zfs_zaccess(zp, v4_mode, 0, B_FALSE, cr)); } static int zfs_delete_final_check(znode_t *zp, znode_t *dzp, mode_t available_perms, cred_t *cr) { int error; uid_t downer; downer = zfs_fuid_map_id(dzp->z_zfsvfs, dzp->z_uid, cr, ZFS_OWNER); error = secpolicy_vnode_access2(cr, ZTOV(dzp), downer, available_perms, VWRITE|VEXEC); if (error == 0) error = zfs_sticky_remove_access(dzp, zp, cr); return (error); } /* * Determine whether Access should be granted/deny, without * consulting least priv subsystem. * * The following chart is the recommended NFSv4 enforcement for * ability to delete an object. * * ------------------------------------------------------- * | Parent Dir | Target Object Permissions | * | permissions | | * ------------------------------------------------------- * | | ACL Allows | ACL Denies| Delete | * | | Delete | Delete | unspecified| * ------------------------------------------------------- * | ACL Allows | Permit | Permit | Permit | * | DELETE_CHILD | | * ------------------------------------------------------- * | ACL Denies | Permit | Deny | Deny | * | DELETE_CHILD | | | | * ------------------------------------------------------- * | ACL specifies | | | | * | only allow | Permit | Permit | Permit | * | write and | | | | * | execute | | | | * ------------------------------------------------------- * | ACL denies | | | | * | write and | Permit | Deny | Deny | * | execute | | | | * ------------------------------------------------------- * ^ * | * No search privilege, can't even look up file? * */ int zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr) { uint32_t dzp_working_mode = 0; uint32_t zp_working_mode = 0; int dzp_error, zp_error; mode_t available_perms; boolean_t dzpcheck_privs = B_TRUE; boolean_t zpcheck_privs = B_TRUE; /* * We want specific DELETE permissions to * take precedence over WRITE/EXECUTE. We don't * want an ACL such as this to mess us up. * user:joe:write_data:deny,user:joe:delete:allow * * However, deny permissions may ultimately be overridden * by secpolicy_vnode_access(). * * We will ask for all of the necessary permissions and then * look at the working modes from the directory and target object * to determine what was found. */ if (zp->z_pflags & (ZFS_IMMUTABLE | ZFS_NOUNLINK)) return (SET_ERROR(EPERM)); /* * First row * If the directory permissions allow the delete, we are done. */ if ((dzp_error = zfs_zaccess_common(dzp, ACE_DELETE_CHILD, &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0) return (0); /* * If target object has delete permission then we are done */ if ((zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode, &zpcheck_privs, B_FALSE, cr)) == 0) return (0); ASSERT(dzp_error && zp_error); if (!dzpcheck_privs) return (dzp_error); if (!zpcheck_privs) return (zp_error); /* * Second row * * If directory returns EACCES then delete_child was denied * due to deny delete_child. In this case send the request through * secpolicy_vnode_remove(). We don't use zfs_delete_final_check() * since that *could* allow the delete based on write/execute permission * and we want delete permissions to override write/execute. */ if (dzp_error == EACCES) { /* XXXPJD: s/dzp/zp/ ? */ return (secpolicy_vnode_remove(ZTOV(dzp), cr)); } /* * Third Row * only need to see if we have write/execute on directory. */ dzp_error = zfs_zaccess_common(dzp, ACE_EXECUTE|ACE_WRITE_DATA, &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr); if (dzp_error != 0 && !dzpcheck_privs) return (dzp_error); /* * Fourth row */ available_perms = (dzp_working_mode & ACE_WRITE_DATA) ? 0 : VWRITE; available_perms |= (dzp_working_mode & ACE_EXECUTE) ? 0 : VEXEC; return (zfs_delete_final_check(zp, dzp, available_perms, cr)); } int zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp, znode_t *tzp, cred_t *cr) { int add_perm; int error; if (szp->z_pflags & ZFS_AV_QUARANTINED) return (SET_ERROR(EACCES)); add_perm = (ZTOV(szp)->v_type == VDIR) ? ACE_ADD_SUBDIRECTORY : ACE_ADD_FILE; /* * Rename permissions are combination of delete permission + * add file/subdir permission. * * BSD operating systems also require write permission * on the directory being moved from one parent directory * to another. */ if (ZTOV(szp)->v_type == VDIR && ZTOV(sdzp) != ZTOV(tdzp)) { if ((error = zfs_zaccess(szp, ACE_WRITE_DATA, 0, B_FALSE, cr))) return (error); } /* * first make sure we do the delete portion. * * If that succeeds then check for add_file/add_subdir permissions */ if ((error = zfs_zaccess_delete(sdzp, szp, cr))) return (error); /* * If we have a tzp, see if we can delete it? */ if (tzp && (error = zfs_zaccess_delete(tdzp, tzp, cr))) return (error); /* * Now check for add permissions */ error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr); return (error); } diff --git a/sys/contrib/openzfs/module/zfs/zfs_replay.c b/sys/contrib/openzfs/module/zfs/zfs_replay.c index 53c7dbd5df43..cba5e8c9cd0b 100644 --- a/sys/contrib/openzfs/module/zfs/zfs_replay.c +++ b/sys/contrib/openzfs/module/zfs/zfs_replay.c @@ -1,997 +1,992 @@ /* * 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 Cyril Plisko. All rights reserved. * Copyright (c) 2013, 2017 by Delphix. All rights reserved. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * NB: FreeBSD expects to be able to do vnode locking in lookup and * hold the locks across all subsequent VOPs until vput is called. * This means that its zfs vnops routines can't do any internal locking. * In order to have the same contract as the Linux vnops there would * needed to be duplicate locked vnops. If the vnops were used more widely * in common code this would likely be preferable. However, currently * this is the only file where this is the case. */ /* * Functions to replay ZFS intent log (ZIL) records * The functions are called through a function vector (zfs_replay_vector) * which is indexed by the transaction type. */ static void zfs_init_vattr(vattr_t *vap, uint64_t mask, uint64_t mode, uint64_t uid, uint64_t gid, uint64_t rdev, uint64_t nodeid) { bzero(vap, sizeof (*vap)); vap->va_mask = (uint_t)mask; vap->va_mode = mode; #ifdef __FreeBSD__ vap->va_type = IFTOVT(mode); #endif vap->va_uid = (uid_t)(IS_EPHEMERAL(uid)) ? -1 : uid; vap->va_gid = (gid_t)(IS_EPHEMERAL(gid)) ? -1 : gid; vap->va_rdev = zfs_cmpldev(rdev); vap->va_nodeid = nodeid; } /* ARGSUSED */ static int zfs_replay_error(void *arg1, void *arg2, boolean_t byteswap) { return (SET_ERROR(ENOTSUP)); } static void zfs_replay_xvattr(lr_attr_t *lrattr, xvattr_t *xvap) { xoptattr_t *xoap = NULL; uint64_t *attrs; uint64_t *crtime; uint32_t *bitmap; void *scanstamp; int i; xvap->xva_vattr.va_mask |= ATTR_XVATTR; if ((xoap = xva_getxoptattr(xvap)) == NULL) { xvap->xva_vattr.va_mask &= ~ATTR_XVATTR; /* shouldn't happen */ return; } ASSERT(lrattr->lr_attr_masksize == xvap->xva_mapsize); bitmap = &lrattr->lr_attr_bitmap; for (i = 0; i != lrattr->lr_attr_masksize; i++, bitmap++) xvap->xva_reqattrmap[i] = *bitmap; attrs = (uint64_t *)(lrattr + lrattr->lr_attr_masksize - 1); crtime = attrs + 1; scanstamp = (caddr_t)(crtime + 2); if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) xoap->xoa_hidden = ((*attrs & XAT0_HIDDEN) != 0); if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) xoap->xoa_system = ((*attrs & XAT0_SYSTEM) != 0); if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) xoap->xoa_archive = ((*attrs & XAT0_ARCHIVE) != 0); if (XVA_ISSET_REQ(xvap, XAT_READONLY)) xoap->xoa_readonly = ((*attrs & XAT0_READONLY) != 0); if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) xoap->xoa_immutable = ((*attrs & XAT0_IMMUTABLE) != 0); if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) xoap->xoa_nounlink = ((*attrs & XAT0_NOUNLINK) != 0); if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) xoap->xoa_appendonly = ((*attrs & XAT0_APPENDONLY) != 0); if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) xoap->xoa_nodump = ((*attrs & XAT0_NODUMP) != 0); if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) xoap->xoa_opaque = ((*attrs & XAT0_OPAQUE) != 0); if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) xoap->xoa_av_modified = ((*attrs & XAT0_AV_MODIFIED) != 0); if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) xoap->xoa_av_quarantined = ((*attrs & XAT0_AV_QUARANTINED) != 0); if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) ZFS_TIME_DECODE(&xoap->xoa_createtime, crtime); if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) { ASSERT(!XVA_ISSET_REQ(xvap, XAT_PROJID)); bcopy(scanstamp, xoap->xoa_av_scanstamp, AV_SCANSTAMP_SZ); } else if (XVA_ISSET_REQ(xvap, XAT_PROJID)) { /* * XAT_PROJID and XAT_AV_SCANSTAMP will never be valid * at the same time, so we can share the same space. */ bcopy(scanstamp, &xoap->xoa_projid, sizeof (uint64_t)); } if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) xoap->xoa_reparse = ((*attrs & XAT0_REPARSE) != 0); if (XVA_ISSET_REQ(xvap, XAT_OFFLINE)) xoap->xoa_offline = ((*attrs & XAT0_OFFLINE) != 0); if (XVA_ISSET_REQ(xvap, XAT_SPARSE)) xoap->xoa_sparse = ((*attrs & XAT0_SPARSE) != 0); if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT)) xoap->xoa_projinherit = ((*attrs & XAT0_PROJINHERIT) != 0); } static int zfs_replay_domain_cnt(uint64_t uid, uint64_t gid) { uint64_t uid_idx; uint64_t gid_idx; int domcnt = 0; uid_idx = FUID_INDEX(uid); gid_idx = FUID_INDEX(gid); if (uid_idx) domcnt++; if (gid_idx > 0 && gid_idx != uid_idx) domcnt++; return (domcnt); } static void * zfs_replay_fuid_domain_common(zfs_fuid_info_t *fuid_infop, void *start, int domcnt) { int i; for (i = 0; i != domcnt; i++) { fuid_infop->z_domain_table[i] = start; start = (caddr_t)start + strlen(start) + 1; } return (start); } /* * Set the uid/gid in the fuid_info structure. */ static void zfs_replay_fuid_ugid(zfs_fuid_info_t *fuid_infop, uint64_t uid, uint64_t gid) { /* * If owner or group are log specific FUIDs then slurp up * domain information and build zfs_fuid_info_t */ if (IS_EPHEMERAL(uid)) fuid_infop->z_fuid_owner = uid; if (IS_EPHEMERAL(gid)) fuid_infop->z_fuid_group = gid; } /* * Load fuid domains into fuid_info_t */ static zfs_fuid_info_t * zfs_replay_fuid_domain(void *buf, void **end, uint64_t uid, uint64_t gid) { int domcnt; zfs_fuid_info_t *fuid_infop; fuid_infop = zfs_fuid_info_alloc(); domcnt = zfs_replay_domain_cnt(uid, gid); if (domcnt == 0) return (fuid_infop); fuid_infop->z_domain_table = kmem_zalloc(domcnt * sizeof (char *), KM_SLEEP); zfs_replay_fuid_ugid(fuid_infop, uid, gid); fuid_infop->z_domain_cnt = domcnt; *end = zfs_replay_fuid_domain_common(fuid_infop, buf, domcnt); return (fuid_infop); } /* * load zfs_fuid_t's and fuid_domains into fuid_info_t */ static zfs_fuid_info_t * zfs_replay_fuids(void *start, void **end, int idcnt, int domcnt, uint64_t uid, uint64_t gid) { uint64_t *log_fuid = (uint64_t *)start; zfs_fuid_info_t *fuid_infop; int i; fuid_infop = zfs_fuid_info_alloc(); fuid_infop->z_domain_cnt = domcnt; fuid_infop->z_domain_table = kmem_zalloc(domcnt * sizeof (char *), KM_SLEEP); for (i = 0; i != idcnt; i++) { zfs_fuid_t *zfuid; zfuid = kmem_alloc(sizeof (zfs_fuid_t), KM_SLEEP); zfuid->z_logfuid = *log_fuid; zfuid->z_id = -1; zfuid->z_domidx = 0; list_insert_tail(&fuid_infop->z_fuids, zfuid); log_fuid++; } zfs_replay_fuid_ugid(fuid_infop, uid, gid); *end = zfs_replay_fuid_domain_common(fuid_infop, log_fuid, domcnt); return (fuid_infop); } static void zfs_replay_swap_attrs(lr_attr_t *lrattr) { /* swap the lr_attr structure */ byteswap_uint32_array(lrattr, sizeof (*lrattr)); /* swap the bitmap */ byteswap_uint32_array(lrattr + 1, (lrattr->lr_attr_masksize - 1) * sizeof (uint32_t)); /* swap the attributes, create time + 64 bit word for attributes */ byteswap_uint64_array((caddr_t)(lrattr + 1) + (sizeof (uint32_t) * (lrattr->lr_attr_masksize - 1)), 3 * sizeof (uint64_t)); } /* * Replay file create with optional ACL, xvattr information as well * as option FUID information. */ static int zfs_replay_create_acl(void *arg1, void *arg2, boolean_t byteswap) { zfsvfs_t *zfsvfs = arg1; lr_acl_create_t *lracl = arg2; char *name = NULL; /* location determined later */ lr_create_t *lr = (lr_create_t *)lracl; znode_t *dzp; znode_t *zp; xvattr_t xva; int vflg = 0; vsecattr_t vsec = { 0 }; lr_attr_t *lrattr; void *aclstart; void *fuidstart; size_t xvatlen = 0; uint64_t txtype; uint64_t objid; uint64_t dnodesize; int error; txtype = (lr->lr_common.lrc_txtype & ~TX_CI); if (byteswap) { byteswap_uint64_array(lracl, sizeof (*lracl)); if (txtype == TX_CREATE_ACL_ATTR || txtype == TX_MKDIR_ACL_ATTR) { lrattr = (lr_attr_t *)(caddr_t)(lracl + 1); zfs_replay_swap_attrs(lrattr); xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize); } aclstart = (caddr_t)(lracl + 1) + xvatlen; zfs_ace_byteswap(aclstart, lracl->lr_acl_bytes, B_FALSE); /* swap fuids */ if (lracl->lr_fuidcnt) { byteswap_uint64_array((caddr_t)aclstart + ZIL_ACE_LENGTH(lracl->lr_acl_bytes), lracl->lr_fuidcnt * sizeof (uint64_t)); } } if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0) return (error); objid = LR_FOID_GET_OBJ(lr->lr_foid); dnodesize = LR_FOID_GET_SLOTS(lr->lr_foid) << DNODE_SHIFT; xva_init(&xva); zfs_init_vattr(&xva.xva_vattr, ATTR_MODE | ATTR_UID | ATTR_GID, lr->lr_mode, lr->lr_uid, lr->lr_gid, lr->lr_rdev, objid); /* * All forms of zfs create (create, mkdir, mkxattrdir, symlink) * eventually end up in zfs_mknode(), which assigns the object's * creation time, generation number, and dnode size. The generic * zfs_create() has no concept of these attributes, so we smuggle * the values inside the vattr's otherwise unused va_ctime, * va_nblocks, and va_fsid fields. */ ZFS_TIME_DECODE(&xva.xva_vattr.va_ctime, lr->lr_crtime); xva.xva_vattr.va_nblocks = lr->lr_gen; xva.xva_vattr.va_fsid = dnodesize; error = dnode_try_claim(zfsvfs->z_os, objid, dnodesize >> DNODE_SHIFT); if (error) goto bail; if (lr->lr_common.lrc_txtype & TX_CI) vflg |= FIGNORECASE; switch (txtype) { case TX_CREATE_ACL: aclstart = (caddr_t)(lracl + 1); fuidstart = (caddr_t)aclstart + ZIL_ACE_LENGTH(lracl->lr_acl_bytes); zfsvfs->z_fuid_replay = zfs_replay_fuids(fuidstart, (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt, lr->lr_uid, lr->lr_gid); /*FALLTHROUGH*/ case TX_CREATE_ACL_ATTR: if (name == NULL) { lrattr = (lr_attr_t *)(caddr_t)(lracl + 1); xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize); xva.xva_vattr.va_mask |= ATTR_XVATTR; zfs_replay_xvattr(lrattr, &xva); } vsec.vsa_mask = VSA_ACE | VSA_ACE_ACLFLAGS; vsec.vsa_aclentp = (caddr_t)(lracl + 1) + xvatlen; vsec.vsa_aclcnt = lracl->lr_aclcnt; vsec.vsa_aclentsz = lracl->lr_acl_bytes; vsec.vsa_aclflags = lracl->lr_acl_flags; if (zfsvfs->z_fuid_replay == NULL) { fuidstart = (caddr_t)(lracl + 1) + xvatlen + ZIL_ACE_LENGTH(lracl->lr_acl_bytes); zfsvfs->z_fuid_replay = zfs_replay_fuids(fuidstart, (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt, lr->lr_uid, lr->lr_gid); } error = zfs_create(dzp, name, &xva.xva_vattr, 0, 0, &zp, kcred, vflg, &vsec); break; case TX_MKDIR_ACL: aclstart = (caddr_t)(lracl + 1); fuidstart = (caddr_t)aclstart + ZIL_ACE_LENGTH(lracl->lr_acl_bytes); zfsvfs->z_fuid_replay = zfs_replay_fuids(fuidstart, (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt, lr->lr_uid, lr->lr_gid); /*FALLTHROUGH*/ case TX_MKDIR_ACL_ATTR: if (name == NULL) { lrattr = (lr_attr_t *)(caddr_t)(lracl + 1); xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize); zfs_replay_xvattr(lrattr, &xva); } vsec.vsa_mask = VSA_ACE | VSA_ACE_ACLFLAGS; vsec.vsa_aclentp = (caddr_t)(lracl + 1) + xvatlen; vsec.vsa_aclcnt = lracl->lr_aclcnt; vsec.vsa_aclentsz = lracl->lr_acl_bytes; vsec.vsa_aclflags = lracl->lr_acl_flags; if (zfsvfs->z_fuid_replay == NULL) { fuidstart = (caddr_t)(lracl + 1) + xvatlen + ZIL_ACE_LENGTH(lracl->lr_acl_bytes); zfsvfs->z_fuid_replay = zfs_replay_fuids(fuidstart, (void *)&name, lracl->lr_fuidcnt, lracl->lr_domcnt, lr->lr_uid, lr->lr_gid); } error = zfs_mkdir(dzp, name, &xva.xva_vattr, &zp, kcred, vflg, &vsec); break; default: error = SET_ERROR(ENOTSUP); } bail: if (error == 0 && zp != NULL) { #ifdef __FreeBSD__ VOP_UNLOCK1(ZTOV(zp)); #endif zrele(zp); } zrele(dzp); if (zfsvfs->z_fuid_replay) zfs_fuid_info_free(zfsvfs->z_fuid_replay); zfsvfs->z_fuid_replay = NULL; return (error); } static int zfs_replay_create(void *arg1, void *arg2, boolean_t byteswap) { zfsvfs_t *zfsvfs = arg1; lr_create_t *lr = arg2; char *name = NULL; /* location determined later */ char *link; /* symlink content follows name */ znode_t *dzp; znode_t *zp = NULL; xvattr_t xva; int vflg = 0; size_t lrsize = sizeof (lr_create_t); lr_attr_t *lrattr; void *start; size_t xvatlen; uint64_t txtype; uint64_t objid; uint64_t dnodesize; int error; txtype = (lr->lr_common.lrc_txtype & ~TX_CI); if (byteswap) { byteswap_uint64_array(lr, sizeof (*lr)); if (txtype == TX_CREATE_ATTR || txtype == TX_MKDIR_ATTR) zfs_replay_swap_attrs((lr_attr_t *)(lr + 1)); } if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0) return (error); objid = LR_FOID_GET_OBJ(lr->lr_foid); dnodesize = LR_FOID_GET_SLOTS(lr->lr_foid) << DNODE_SHIFT; xva_init(&xva); zfs_init_vattr(&xva.xva_vattr, ATTR_MODE | ATTR_UID | ATTR_GID, lr->lr_mode, lr->lr_uid, lr->lr_gid, lr->lr_rdev, objid); /* * All forms of zfs create (create, mkdir, mkxattrdir, symlink) * eventually end up in zfs_mknode(), which assigns the object's * creation time, generation number, and dnode slot count. The * generic zfs_create() has no concept of these attributes, so * we smuggle the values inside the vattr's otherwise unused * va_ctime, va_nblocks, and va_fsid fields. */ ZFS_TIME_DECODE(&xva.xva_vattr.va_ctime, lr->lr_crtime); xva.xva_vattr.va_nblocks = lr->lr_gen; xva.xva_vattr.va_fsid = dnodesize; error = dnode_try_claim(zfsvfs->z_os, objid, dnodesize >> DNODE_SHIFT); if (error) goto out; if (lr->lr_common.lrc_txtype & TX_CI) vflg |= FIGNORECASE; /* * Symlinks don't have fuid info, and CIFS never creates * symlinks. * * The _ATTR versions will grab the fuid info in their subcases. */ if ((int)lr->lr_common.lrc_txtype != TX_SYMLINK && (int)lr->lr_common.lrc_txtype != TX_MKDIR_ATTR && (int)lr->lr_common.lrc_txtype != TX_CREATE_ATTR) { start = (lr + 1); zfsvfs->z_fuid_replay = zfs_replay_fuid_domain(start, &start, lr->lr_uid, lr->lr_gid); } switch (txtype) { case TX_CREATE_ATTR: lrattr = (lr_attr_t *)(caddr_t)(lr + 1); xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize); zfs_replay_xvattr((lr_attr_t *)((caddr_t)lr + lrsize), &xva); start = (caddr_t)(lr + 1) + xvatlen; zfsvfs->z_fuid_replay = zfs_replay_fuid_domain(start, &start, lr->lr_uid, lr->lr_gid); name = (char *)start; /*FALLTHROUGH*/ case TX_CREATE: if (name == NULL) name = (char *)start; error = zfs_create(dzp, name, &xva.xva_vattr, 0, 0, &zp, kcred, vflg, NULL); break; case TX_MKDIR_ATTR: lrattr = (lr_attr_t *)(caddr_t)(lr + 1); xvatlen = ZIL_XVAT_SIZE(lrattr->lr_attr_masksize); zfs_replay_xvattr((lr_attr_t *)((caddr_t)lr + lrsize), &xva); start = (caddr_t)(lr + 1) + xvatlen; zfsvfs->z_fuid_replay = zfs_replay_fuid_domain(start, &start, lr->lr_uid, lr->lr_gid); name = (char *)start; /*FALLTHROUGH*/ case TX_MKDIR: if (name == NULL) name = (char *)(lr + 1); error = zfs_mkdir(dzp, name, &xva.xva_vattr, &zp, kcred, vflg, NULL); break; case TX_MKXATTR: error = zfs_make_xattrdir(dzp, &xva.xva_vattr, &zp, kcred); break; case TX_SYMLINK: name = (char *)(lr + 1); link = name + strlen(name) + 1; error = zfs_symlink(dzp, name, &xva.xva_vattr, link, &zp, kcred, vflg); break; default: error = SET_ERROR(ENOTSUP); } out: if (error == 0 && zp != NULL) { #ifdef __FreeBSD__ VOP_UNLOCK1(ZTOV(zp)); #endif zrele(zp); } zrele(dzp); if (zfsvfs->z_fuid_replay) zfs_fuid_info_free(zfsvfs->z_fuid_replay); zfsvfs->z_fuid_replay = NULL; return (error); } static int zfs_replay_remove(void *arg1, void *arg2, boolean_t byteswap) { zfsvfs_t *zfsvfs = arg1; lr_remove_t *lr = arg2; char *name = (char *)(lr + 1); /* name follows lr_remove_t */ znode_t *dzp; int error; int vflg = 0; if (byteswap) byteswap_uint64_array(lr, sizeof (*lr)); if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0) return (error); if (lr->lr_common.lrc_txtype & TX_CI) vflg |= FIGNORECASE; switch ((int)lr->lr_common.lrc_txtype) { case TX_REMOVE: error = zfs_remove(dzp, name, kcred, vflg); break; case TX_RMDIR: error = zfs_rmdir(dzp, name, NULL, kcred, vflg); break; default: error = SET_ERROR(ENOTSUP); } zrele(dzp); return (error); } static int zfs_replay_link(void *arg1, void *arg2, boolean_t byteswap) { zfsvfs_t *zfsvfs = arg1; lr_link_t *lr = arg2; char *name = (char *)(lr + 1); /* name follows lr_link_t */ znode_t *dzp, *zp; int error; int vflg = 0; if (byteswap) byteswap_uint64_array(lr, sizeof (*lr)); if ((error = zfs_zget(zfsvfs, lr->lr_doid, &dzp)) != 0) return (error); if ((error = zfs_zget(zfsvfs, lr->lr_link_obj, &zp)) != 0) { zrele(dzp); return (error); } if (lr->lr_common.lrc_txtype & TX_CI) vflg |= FIGNORECASE; error = zfs_link(dzp, zp, name, kcred, vflg); zrele(zp); zrele(dzp); return (error); } static int zfs_replay_rename(void *arg1, void *arg2, boolean_t byteswap) { zfsvfs_t *zfsvfs = arg1; lr_rename_t *lr = arg2; char *sname = (char *)(lr + 1); /* sname and tname follow lr_rename_t */ char *tname = sname + strlen(sname) + 1; znode_t *sdzp, *tdzp; int error; int vflg = 0; if (byteswap) byteswap_uint64_array(lr, sizeof (*lr)); if ((error = zfs_zget(zfsvfs, lr->lr_sdoid, &sdzp)) != 0) return (error); if ((error = zfs_zget(zfsvfs, lr->lr_tdoid, &tdzp)) != 0) { zrele(sdzp); return (error); } if (lr->lr_common.lrc_txtype & TX_CI) vflg |= FIGNORECASE; error = zfs_rename(sdzp, sname, tdzp, tname, kcred, vflg); zrele(tdzp); zrele(sdzp); return (error); } static int zfs_replay_write(void *arg1, void *arg2, boolean_t byteswap) { zfsvfs_t *zfsvfs = arg1; lr_write_t *lr = arg2; char *data = (char *)(lr + 1); /* data follows lr_write_t */ znode_t *zp; int error; uint64_t eod, offset, length; if (byteswap) byteswap_uint64_array(lr, sizeof (*lr)); if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) { /* * As we can log writes out of order, it's possible the * file has been removed. In this case just drop the write * and return success. */ if (error == ENOENT) error = 0; return (error); } offset = lr->lr_offset; length = lr->lr_length; eod = offset + length; /* end of data for this write */ /* * This may be a write from a dmu_sync() for a whole block, * and may extend beyond the current end of the file. * We can't just replay what was written for this TX_WRITE as * a future TX_WRITE2 may extend the eof and the data for that * write needs to be there. So we write the whole block and * reduce the eof. This needs to be done within the single dmu * transaction created within vn_rdwr -> zfs_write. So a possible * new end of file is passed through in zfsvfs->z_replay_eof */ zfsvfs->z_replay_eof = 0; /* 0 means don't change end of file */ /* If it's a dmu_sync() block, write the whole block */ if (lr->lr_common.lrc_reclen == sizeof (lr_write_t)) { uint64_t blocksize = BP_GET_LSIZE(&lr->lr_blkptr); if (length < blocksize) { offset -= offset % blocksize; length = blocksize; } if (zp->z_size < eod) zfsvfs->z_replay_eof = eod; } error = zfs_write_simple(zp, data, length, offset, NULL); zrele(zp); zfsvfs->z_replay_eof = 0; /* safety */ return (error); } /* * TX_WRITE2 are only generated when dmu_sync() returns EALREADY * meaning the pool block is already being synced. So now that we always write * out full blocks, all we have to do is expand the eof if * the file is grown. */ static int zfs_replay_write2(void *arg1, void *arg2, boolean_t byteswap) { zfsvfs_t *zfsvfs = arg1; lr_write_t *lr = arg2; znode_t *zp; int error; uint64_t end; if (byteswap) byteswap_uint64_array(lr, sizeof (*lr)); if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) return (error); top: end = lr->lr_offset + lr->lr_length; if (end > zp->z_size) { dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); zp->z_size = end; dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); error = dmu_tx_assign(tx, TXG_WAIT); if (error) { zrele(zp); if (error == ERESTART) { dmu_tx_wait(tx); dmu_tx_abort(tx); goto top; } dmu_tx_abort(tx); return (error); } (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs), (void *)&zp->z_size, sizeof (uint64_t), tx); /* Ensure the replayed seq is updated */ (void) zil_replaying(zfsvfs->z_log, tx); dmu_tx_commit(tx); } zrele(zp); return (error); } static int zfs_replay_truncate(void *arg1, void *arg2, boolean_t byteswap) { zfsvfs_t *zfsvfs = arg1; lr_truncate_t *lr = arg2; znode_t *zp; flock64_t fl; int error; if (byteswap) byteswap_uint64_array(lr, sizeof (*lr)); if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) return (error); bzero(&fl, sizeof (fl)); fl.l_type = F_WRLCK; fl.l_whence = SEEK_SET; fl.l_start = lr->lr_offset; fl.l_len = lr->lr_length; error = zfs_space(zp, F_FREESP, &fl, O_RDWR | O_LARGEFILE, lr->lr_offset, kcred); zrele(zp); return (error); } static int zfs_replay_setattr(void *arg1, void *arg2, boolean_t byteswap) { zfsvfs_t *zfsvfs = arg1; lr_setattr_t *lr = arg2; znode_t *zp; xvattr_t xva; vattr_t *vap = &xva.xva_vattr; int error; void *start; xva_init(&xva); if (byteswap) { byteswap_uint64_array(lr, sizeof (*lr)); if ((lr->lr_mask & ATTR_XVATTR) && zfsvfs->z_version >= ZPL_VERSION_INITIAL) zfs_replay_swap_attrs((lr_attr_t *)(lr + 1)); } if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) return (error); zfs_init_vattr(vap, lr->lr_mask, lr->lr_mode, lr->lr_uid, lr->lr_gid, 0, lr->lr_foid); vap->va_size = lr->lr_size; ZFS_TIME_DECODE(&vap->va_atime, lr->lr_atime); ZFS_TIME_DECODE(&vap->va_mtime, lr->lr_mtime); gethrestime(&vap->va_ctime); vap->va_mask |= ATTR_CTIME; /* * Fill in xvattr_t portions if necessary. */ start = (lr_setattr_t *)(lr + 1); if (vap->va_mask & ATTR_XVATTR) { zfs_replay_xvattr((lr_attr_t *)start, &xva); start = (caddr_t)start + ZIL_XVAT_SIZE(((lr_attr_t *)start)->lr_attr_masksize); } else xva.xva_vattr.va_mask &= ~ATTR_XVATTR; zfsvfs->z_fuid_replay = zfs_replay_fuid_domain(start, &start, lr->lr_uid, lr->lr_gid); - /* - * Satisfy assertions. - */ - vn_seqc_write_begin(ZTOV(zp)); error = zfs_setattr(zp, vap, 0, kcred); - vn_seqc_write_end(ZTOV(zp)); zfs_fuid_info_free(zfsvfs->z_fuid_replay); zfsvfs->z_fuid_replay = NULL; zrele(zp); return (error); } static int zfs_replay_acl_v0(void *arg1, void *arg2, boolean_t byteswap) { zfsvfs_t *zfsvfs = arg1; lr_acl_v0_t *lr = arg2; ace_t *ace = (ace_t *)(lr + 1); /* ace array follows lr_acl_t */ vsecattr_t vsa; znode_t *zp; int error; if (byteswap) { byteswap_uint64_array(lr, sizeof (*lr)); zfs_oldace_byteswap(ace, lr->lr_aclcnt); } if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) return (error); bzero(&vsa, sizeof (vsa)); vsa.vsa_mask = VSA_ACE | VSA_ACECNT; vsa.vsa_aclcnt = lr->lr_aclcnt; vsa.vsa_aclentsz = sizeof (ace_t) * vsa.vsa_aclcnt; vsa.vsa_aclflags = 0; vsa.vsa_aclentp = ace; error = zfs_setsecattr(zp, &vsa, 0, kcred); zrele(zp); return (error); } /* * Replaying ACLs is complicated by FUID support. * The log record may contain some optional data * to be used for replaying FUID's. These pieces * are the actual FUIDs that were created initially. * The FUID table index may no longer be valid and * during zfs_create() a new index may be assigned. * Because of this the log will contain the original * domain+rid in order to create a new FUID. * * The individual ACEs may contain an ephemeral uid/gid which is no * longer valid and will need to be replaced with an actual FUID. * */ static int zfs_replay_acl(void *arg1, void *arg2, boolean_t byteswap) { zfsvfs_t *zfsvfs = arg1; lr_acl_t *lr = arg2; ace_t *ace = (ace_t *)(lr + 1); vsecattr_t vsa; znode_t *zp; int error; if (byteswap) { byteswap_uint64_array(lr, sizeof (*lr)); zfs_ace_byteswap(ace, lr->lr_acl_bytes, B_FALSE); if (lr->lr_fuidcnt) { byteswap_uint64_array((caddr_t)ace + ZIL_ACE_LENGTH(lr->lr_acl_bytes), lr->lr_fuidcnt * sizeof (uint64_t)); } } if ((error = zfs_zget(zfsvfs, lr->lr_foid, &zp)) != 0) return (error); bzero(&vsa, sizeof (vsa)); vsa.vsa_mask = VSA_ACE | VSA_ACECNT | VSA_ACE_ACLFLAGS; vsa.vsa_aclcnt = lr->lr_aclcnt; vsa.vsa_aclentp = ace; vsa.vsa_aclentsz = lr->lr_acl_bytes; vsa.vsa_aclflags = lr->lr_acl_flags; if (lr->lr_fuidcnt) { void *fuidstart = (caddr_t)ace + ZIL_ACE_LENGTH(lr->lr_acl_bytes); zfsvfs->z_fuid_replay = zfs_replay_fuids(fuidstart, &fuidstart, lr->lr_fuidcnt, lr->lr_domcnt, 0, 0); } error = zfs_setsecattr(zp, &vsa, 0, kcred); if (zfsvfs->z_fuid_replay) zfs_fuid_info_free(zfsvfs->z_fuid_replay); zfsvfs->z_fuid_replay = NULL; zrele(zp); return (error); } /* * Callback vectors for replaying records */ zil_replay_func_t *zfs_replay_vector[TX_MAX_TYPE] = { zfs_replay_error, /* no such type */ zfs_replay_create, /* TX_CREATE */ zfs_replay_create, /* TX_MKDIR */ zfs_replay_create, /* TX_MKXATTR */ zfs_replay_create, /* TX_SYMLINK */ zfs_replay_remove, /* TX_REMOVE */ zfs_replay_remove, /* TX_RMDIR */ zfs_replay_link, /* TX_LINK */ zfs_replay_rename, /* TX_RENAME */ zfs_replay_write, /* TX_WRITE */ zfs_replay_truncate, /* TX_TRUNCATE */ zfs_replay_setattr, /* TX_SETATTR */ zfs_replay_acl_v0, /* TX_ACL_V0 */ zfs_replay_acl, /* TX_ACL */ zfs_replay_create_acl, /* TX_CREATE_ACL */ zfs_replay_create, /* TX_CREATE_ATTR */ zfs_replay_create_acl, /* TX_CREATE_ACL_ATTR */ zfs_replay_create_acl, /* TX_MKDIR_ACL */ zfs_replay_create, /* TX_MKDIR_ATTR */ zfs_replay_create_acl, /* TX_MKDIR_ACL_ATTR */ zfs_replay_write2, /* TX_WRITE2 */ };