* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
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 WRITE_MASK_DATA (ACE_WRITE_DATA|ACE_APPEND_DATA|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 (WRITE_MASK_DATA|ACE_WRITE_ATTRIBUTES|ACE_WRITE_ACL|\
- ACE_WRITE_OWNER|ACE_DELETE|ACE_DELETE_CHILD)
+#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)
* ACE FUIDs will be created later.
*/
int
-zfs_copy_ace_2_fuid(vtype_t obj_type, zfs_acl_t *aclp, void *datap,
- zfs_ace_t *z_acl, int aclcnt, size_t *size)
+zfs_copy_ace_2_fuid(zfsvfs_t *zfsvfs, vtype_t obj_type, zfs_acl_t *aclp,
+ void *datap, zfs_ace_t *z_acl, int aclcnt, size_t *size,
+ zfs_fuid_info_t **fuidp, cred_t *cr)
{
int i;
uint16_t entry_type;
entry_type = aceptr->z_hdr.z_flags & ACE_TYPE_FLAGS;
if (entry_type != ACE_OWNER && entry_type != OWNING_GROUP &&
entry_type != ACE_EVERYONE) {
- if (!aclp->z_has_fuids)
- aclp->z_has_fuids = IS_EPHEMERAL(acep->a_who);
- aceptr->z_fuid = (uint64_t)acep->a_who;
+ aceptr->z_fuid = zfs_fuid_create(zfsvfs, acep->a_who,
+ cr, (entry_type == 0) ?
+ ZFS_ACE_USER : ZFS_ACE_GROUP, fuidp);
}
/*
* convert old ACL format to new
*/
void
-zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp)
+zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp, cred_t *cr)
{
zfs_oldace_t *oldaclp;
int i;
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(ZTOV(zp)->v_type, aclp, oldaclp,
- newaclnode->z_acldata, aclp->z_acl_count,
- &newaclnode->z_size) == 0);
+ 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));
* Also, create FUIDs for any User/Group ACEs
*/
static uint64_t
-zfs_mode_fuid_compute(znode_t *zp, zfs_acl_t *aclp, cred_t *cr,
- zfs_fuid_info_t **fuidp, dmu_tx_t *tx)
+zfs_mode_compute(znode_t *zp, zfs_acl_t *aclp)
{
int entry_type;
mode_t mode;
}
}
}
- /*
- * Now handle FUID create for user/group ACEs
- */
- if (entry_type == 0 || entry_type == ACE_IDENTIFIER_GROUP) {
- aclp->z_ops.ace_who_set(acep,
- zfs_fuid_create(zp->z_zfsvfs, who, cr,
- (entry_type == 0) ? ZFS_ACE_USER : ZFS_ACE_GROUP,
- tx, fuidp));
- }
}
return (mode);
}
aclnode = zfs_acl_node_alloc(aclsize);
list_insert_head(&aclp->z_acl, aclnode);
error = dmu_read(zp->z_zfsvfs->z_os, extacl, 0,
- aclsize, aclnode->z_acldata);
+ aclsize, aclnode->z_acldata, DMU_READ_PREFETCH);
aclnode->z_ace_count = acl_count;
aclp->z_acl_count = acl_count;
aclp->z_acl_bytes = aclsize;
* already checked the acl and knows whether to inherit.
*/
int
-zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr,
- zfs_fuid_info_t **fuidp, dmu_tx_t *tx)
+zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, dmu_tx_t *tx)
{
int error;
znode_phys_t *zphys = zp->z_phys;
dmu_object_type_t otype;
zfs_acl_node_t *aclnode;
- ASSERT(MUTEX_HELD(&zp->z_lock));
- ASSERT(MUTEX_HELD(&zp->z_acl_lock));
-
dmu_buf_will_dirty(zp->z_dbuf, tx);
- zphys->zp_mode = zfs_mode_fuid_compute(zp, aclp, cr, fuidp, tx);
+ zphys->zp_mode = zfs_mode_compute(zp, aclp);
/*
* Decide which opbject type to use. If we are forced to
} else {
if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) &&
(zfsvfs->z_version >= ZPL_VERSION_FUID))
- zfs_acl_xform(zp, aclp);
+ zfs_acl_xform(zp, aclp, cr);
ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID);
otype = DMU_OT_ACL;
}
if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0)
zp->z_phys->zp_flags |= ZFS_ACL_TRIVIAL;
- zfs_time_stamper_locked(zp, STATE_CHANGED, tx);
return (0);
}
* Prepend deny ACE
*/
static void *
-zfs_acl_prepend_deny(znode_t *zp, zfs_acl_t *aclp, void *acep,
+zfs_acl_prepend_deny(uint64_t uid, zfs_acl_t *aclp, void *acep,
mode_t mode)
{
zfs_acl_node_t *aclnode;
fuid = aclp->z_ops.ace_who_get(acep);
flags = aclp->z_ops.ace_flags_get(acep);
zfs_set_ace(aclp, newacep, 0, DENY, fuid, (flags & ACE_TYPE_FLAGS));
- zfs_acl_prepend_fixup(aclp, newacep, acep, mode, zp->z_phys->zp_uid);
+ zfs_acl_prepend_fixup(aclp, newacep, acep, mode, uid);
return (newacep);
}
* in PSARC/2002/240
*/
static void
-zfs_acl_chmod(znode_t *zp, uint64_t mode, zfs_acl_t *aclp)
+zfs_acl_chmod(zfsvfs_t *zfsvfs, uint64_t uid,
+ uint64_t mode, zfs_acl_t *aclp)
{
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
void *acep = NULL, *prevacep = NULL;
uint64_t who;
int i;
uint16_t iflags, type;
uint32_t access_mask;
- ASSERT(MUTEX_HELD(&zp->z_acl_lock));
- ASSERT(MUTEX_HELD(&zp->z_lock));
-
- aclp->z_hints = (zp->z_phys->zp_flags & V4_ACL_WIDE_FLAGS);
-
/*
* If discard then just discard all ACL nodes which
* represent the ACEs.
if (!reuse_deny) {
prevacep =
- zfs_acl_prepend_deny(zp,
+ zfs_acl_prepend_deny(uid,
aclp, acep, mode);
} else {
zfs_acl_prepend_fixup(
aclp, prevacep,
- acep, mode,
- zp->z_phys->zp_uid);
+ acep, mode, uid);
}
zfs_fixup_group_entries(aclp, acep,
prevacep, mode);
-
}
}
}
mutex_enter(&zp->z_acl_lock);
*aclp = NULL;
error = zfs_acl_node_read(zp, aclp, B_TRUE);
- if (error == 0)
- zfs_acl_chmod(zp, mode, *aclp);
+ if (error == 0) {
+ (*aclp)->z_hints = zp->z_phys->zp_flags & V4_ACL_WIDE_FLAGS;
+ zfs_acl_chmod(zp->z_zfsvfs, zp->z_phys->zp_uid, mode, *aclp);
+ }
mutex_exit(&zp->z_acl_lock);
mutex_exit(&zp->z_lock);
return (error);
* Should ACE be inherited?
*/
static int
-zfs_ace_can_use(znode_t *zp, uint16_t acep_flags)
+zfs_ace_can_use(vtype_t vtype, uint16_t acep_flags)
{
- int vtype = ZTOV(zp)->v_type;
int iflags = (acep_flags & 0xf);
if ((vtype == VDIR) && (iflags & ACE_DIRECTORY_INHERIT_ACE))
* inherit inheritable ACEs from parent
*/
static zfs_acl_t *
-zfs_acl_inherit(znode_t *zp, zfs_acl_t *paclp, uint64_t mode,
- boolean_t *need_chmod)
+zfs_acl_inherit(zfsvfs_t *zfsvfs, vtype_t vtype, zfs_acl_t *paclp,
+ uint64_t mode, boolean_t *need_chmod)
{
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
void *pacep;
void *acep, *acep2;
zfs_acl_node_t *aclnode, *aclnode2;
size_t ace_size;
void *data1, *data2;
size_t data1sz, data2sz;
- boolean_t vdir = ZTOV(zp)->v_type == VDIR;
- boolean_t vreg = ZTOV(zp)->v_type == VREG;
+ boolean_t vdir = vtype == VDIR;
+ boolean_t vreg = vtype == VREG;
boolean_t passthrough, passthrough_x, noallow;
passthrough_x =
ace_size = aclp->z_ops.ace_size(pacep);
- if (!zfs_ace_can_use(zp, iflags))
+ if (!zfs_ace_can_use(vtype, iflags))
continue;
/*
* Create file system object initial permissions
* including inheritable ACEs.
*/
-void
-zfs_perm_init(znode_t *zp, znode_t *parent, int flag,
- vattr_t *vap, dmu_tx_t *tx, cred_t *cr,
- zfs_acl_t *setaclp, zfs_fuid_info_t **fuidp)
+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)
{
- uint64_t mode, fuid, fgid;
int error;
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- zfs_acl_t *aclp = NULL;
+ zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
zfs_acl_t *paclp;
- xvattr_t *xvap = (xvattr_t *)vap;
gid_t gid;
boolean_t need_chmod = B_TRUE;
- if (setaclp)
- aclp = setaclp;
+ bzero(acl_ids, sizeof (zfs_acl_ids_t));
+ acl_ids->z_mode = MAKEIMODE(vap->va_type, vap->va_mode);
- 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 | IS_REPLAY)) ||
((flag & IS_XATTR) && (vap->va_type == VDIR))) {
- fuid = zfs_fuid_create(zfsvfs, vap->va_uid, cr,
- ZFS_OWNER, tx, fuidp);
- fgid = zfs_fuid_create(zfsvfs, vap->va_gid, cr,
- ZFS_GROUP, tx, fuidp);
+ 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 {
- fuid = zfs_fuid_create_cred(zfsvfs, ZFS_OWNER, tx, cr, fuidp);
- fgid = 0;
+ 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) {
- fgid = zfs_fuid_create(zfsvfs, vap->va_gid, cr,
- ZFS_GROUP, tx, 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;
- if (fgid != parent->z_phys->zp_gid &&
+ if (acl_ids->z_fgid != dzp->z_phys->zp_gid &&
!groupmember(vap->va_gid, cr) &&
secpolicy_vnode_create_gid(cr) != 0)
- fgid = 0;
+ acl_ids->z_fgid = 0;
}
- if (fgid == 0) {
- if (parent->z_phys->zp_mode & S_ISGID) {
- fgid = parent->z_phys->zp_gid;
- gid = zfs_fuid_map_id(zfsvfs, fgid,
+ if (acl_ids->z_fgid == 0) {
+ if (dzp->z_phys->zp_mode & S_ISGID) {
+ acl_ids->z_fgid = dzp->z_phys->zp_gid;
+ gid = zfs_fuid_map_id(zfsvfs, acl_ids->z_fgid,
cr, ZFS_GROUP);
} else {
- fgid = zfs_fuid_create_cred(zfsvfs,
- ZFS_GROUP, tx, cr, fuidp);
+ acl_ids->z_fgid = zfs_fuid_create_cred(zfsvfs,
+ ZFS_GROUP, cr, &acl_ids->z_fuidp);
gid = crgetgid(cr);
}
}
* file's new group, clear the file's set-GID bit.
*/
- if ((parent->z_phys->zp_mode & S_ISGID) && (vap->va_type == VDIR)) {
- mode |= S_ISGID;
+ if (!(flag & IS_ROOT_NODE) && (dzp->z_phys->zp_mode & S_ISGID) &&
+ (vap->va_type == VDIR)) {
+ acl_ids->z_mode |= S_ISGID;
} else {
- if ((mode & S_ISGID) &&
+ if ((acl_ids->z_mode & S_ISGID) &&
secpolicy_vnode_setids_setgids(cr, gid) != 0)
- mode &= ~S_ISGID;
- }
-
- zp->z_phys->zp_uid = fuid;
- zp->z_phys->zp_gid = fgid;
- zp->z_phys->zp_mode = mode;
-
- if (aclp == NULL) {
- mutex_enter(&parent->z_lock);
- if ((ZTOV(parent)->v_type == VDIR &&
- (parent->z_phys->zp_flags & ZFS_INHERIT_ACE)) &&
- !(zp->z_phys->zp_flags & ZFS_XATTR)) {
- mutex_enter(&parent->z_acl_lock);
- VERIFY(0 == zfs_acl_node_read(parent, &paclp, B_FALSE));
- mutex_exit(&parent->z_acl_lock);
- aclp = zfs_acl_inherit(zp, paclp, mode, &need_chmod);
+ acl_ids->z_mode &= ~S_ISGID;
+ }
+
+ if (acl_ids->z_aclp == NULL) {
+ mutex_enter(&dzp->z_lock);
+ if (!(flag & IS_ROOT_NODE) && (ZTOV(dzp)->v_type == VDIR &&
+ (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE)) &&
+ !(dzp->z_phys->zp_flags & ZFS_XATTR)) {
+ mutex_enter(&dzp->z_acl_lock);
+ VERIFY(0 == zfs_acl_node_read(dzp, &paclp, B_FALSE));
+ mutex_exit(&dzp->z_acl_lock);
+ acl_ids->z_aclp = zfs_acl_inherit(zfsvfs,
+ vap->va_type, paclp, acl_ids->z_mode, &need_chmod);
zfs_acl_free(paclp);
} else {
- aclp = zfs_acl_alloc(zfs_acl_version_zp(zp));
+ acl_ids->z_aclp =
+ zfs_acl_alloc(zfs_acl_version_zp(dzp));
+ }
+ mutex_exit(&dzp->z_lock);
+ if (need_chmod) {
+ acl_ids->z_aclp->z_hints = (vap->va_type == VDIR) ?
+ ZFS_ACL_AUTO_INHERIT : 0;
+ zfs_acl_chmod(zfsvfs, acl_ids->z_fuid,
+ acl_ids->z_mode, acl_ids->z_aclp);
}
- mutex_exit(&parent->z_lock);
- mutex_enter(&zp->z_lock);
- mutex_enter(&zp->z_acl_lock);
- if (need_chmod)
- zfs_acl_chmod(zp, mode, aclp);
- } else {
- mutex_enter(&zp->z_lock);
- mutex_enter(&zp->z_acl_lock);
}
- /* Force auto_inherit on all new directory objects */
- if (vap->va_type == VDIR)
- aclp->z_hints |= ZFS_ACL_AUTO_INHERIT;
-
- error = zfs_aclset_common(zp, aclp, cr, fuidp, tx);
-
- /* Set optional attributes if any */
- if (vap->va_mask & AT_XVATTR)
- zfs_xvattr_set(zp, xvap);
+ return (0);
+}
- mutex_exit(&zp->z_lock);
- mutex_exit(&zp->z_acl_lock);
- ASSERT3U(error, ==, 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;
+}
- if (aclp != setaclp)
- zfs_acl_free(aclp);
+boolean_t
+zfs_acl_ids_overquota(zfsvfs_t *zfsvfs, zfs_acl_ids_t *acl_ids)
+{
+ return (zfs_usergroup_overquota(zfsvfs, B_FALSE, acl_ids->z_fuid) ||
+ zfs_usergroup_overquota(zfsvfs, B_TRUE, acl_ids->z_fgid));
}
/*
int
zfs_vsec_2_aclp(zfsvfs_t *zfsvfs, vtype_t obj_type,
- vsecattr_t *vsecp, zfs_acl_t **zaclp)
+ vsecattr_t *vsecp, cred_t *cr, zfs_fuid_info_t **fuidp, zfs_acl_t **zaclp)
{
zfs_acl_t *aclp;
zfs_acl_node_t *aclnode;
return (error);
}
} else {
- if ((error = zfs_copy_ace_2_fuid(obj_type, aclp,
+ if ((error = zfs_copy_ace_2_fuid(zfsvfs, obj_type, aclp,
vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt,
- &aclnode->z_size)) != 0) {
+ &aclnode->z_size, fuidp, cr)) != 0) {
zfs_acl_free(aclp);
zfs_acl_node_free(aclnode);
return (error);
int error;
zfs_acl_t *aclp;
zfs_fuid_info_t *fuidp = NULL;
+ boolean_t fuid_dirtied;
if (mask == 0)
return (ENOSYS);
if (error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr))
return (error);
- error = zfs_vsec_2_aclp(zfsvfs, ZTOV(zp)->v_type, vsecp, &aclp);
+ error = zfs_vsec_2_aclp(zfsvfs, ZTOV(zp)->v_type, vsecp, cr, &fuidp,
+ &aclp);
if (error)
return (error);
} else if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes);
}
- if (aclp->z_has_fuids) {
- if (zfsvfs->z_fuid_obj == 0) {
- dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
- FUID_SIZE_ESTIMATE(zfsvfs));
- dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL);
- } else {
- dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj);
- dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0,
- FUID_SIZE_ESTIMATE(zfsvfs));
- }
- }
+ fuid_dirtied = zfsvfs->z_fuid_dirty;
+ if (fuid_dirtied)
+ zfs_fuid_txhold(zfsvfs, tx);
error = dmu_tx_assign(tx, TXG_NOWAIT);
if (error) {
return (error);
}
- error = zfs_aclset_common(zp, aclp, cr, &fuidp, tx);
+ error = zfs_aclset_common(zp, aclp, cr, tx);
ASSERT(error == 0);
+ if (fuid_dirtied)
+ zfs_fuid_sync(zfsvfs, tx);
+
+ zfs_time_stamper_locked(zp, STATE_CHANGED, tx);
zfs_log_acl(zilog, tx, zp, vsecp, fuidp);
if (fuidp)
}
/*
- * working_mode returns the permissions that were not granted
+ * 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_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode,
- boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr)
+zfs_zaccess_dataset_check(znode_t *zp, uint32_t v4_mode)
{
- zfs_acl_t *aclp;
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- 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 fowner;
- uid_t gowner;
-
- /*
- * Short circuit empty requests
- */
- if (v4_mode == 0)
- return (0);
-
- *check_privs = B_TRUE;
-
- if (zfsvfs->z_replay) {
- *working_mode = 0;
- return (0);
- }
-
- *working_mode = v4_mode;
-
if ((v4_mode & WRITE_MASK) &&
(zp->z_zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) &&
- (!IS_DEVVP(ZTOV(zp)))) {
- *check_privs = B_FALSE;
+ (!IS_DEVVP(ZTOV(zp)) ||
+ (IS_DEVVP(ZTOV(zp)) && (v4_mode & WRITE_MASK_ATTRS)))) {
return (EROFS);
}
(zp->z_phys->zp_flags & (ZFS_READONLY | ZFS_IMMUTABLE))) ||
(ZTOV(zp)->v_type == VDIR &&
(zp->z_phys->zp_flags & ZFS_IMMUTABLE)))) {
- *check_privs = B_FALSE;
return (EPERM);
}
if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) &&
(zp->z_phys->zp_flags & ZFS_NOUNLINK)) {
- *check_privs = B_FALSE;
return (EPERM);
}
if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) &&
(zp->z_phys->zp_flags & ZFS_AV_QUARANTINED))) {
- *check_privs = B_FALSE;
return (EACCES);
}
- /*
- * 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);
- }
+ 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 fowner;
+ uid_t gowner;
zfs_fuid_map_ids(zp, cr, &fowner, &gowner);
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;
}
if (checkit) {
- uint32_t mask_matched = (access_mask & *working_mode);
-
- if (mask_matched) {
- if (type == DENY)
- deny_mask |= mask_matched;
-
- *working_mode &= ~mask_matched;
+ 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);
+ zfs_acl_free(aclp);
+ return (0);
+ }
}
+ *working_mode &= ~mask_matched;
}
/* Are we done? */
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_phys->zp_uid, cr, ZFS_OWNER);
+
+ return (
+ secpolicy_vnode_access(cr, ZTOV(zp), owner, VREAD) == 0 ||
+ secpolicy_vnode_access(cr, ZTOV(zp), owner, VWRITE) == 0 ||
+ secpolicy_vnode_access(cr, ZTOV(zp), owner, VEXEC) == 0 ||
+ secpolicy_vnode_chown(cr, B_TRUE) == 0 ||
+ secpolicy_vnode_chown(cr, B_FALSE) == 0 ||
+ secpolicy_vnode_setdac(cr, owner) == 0 ||
+ secpolicy_vnode_remove(cr) == 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);
+ }
+
+ 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)
git://git.camperquake.de / zfs.git / blobdiff