-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see [sun.com URL with a
- * copy of GPLv2].
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/mm.h>
-#include <linux/smp_lock.h>
+#include <linux/xattr.h>
+#ifdef HAVE_LINUX_SELINUX_IS_ENABLED
+#include <linux/selinux.h>
+#endif
#define DEBUG_SUBSYSTEM S_LLITE
#include <obd_support.h>
-#include <lustre_lite.h>
#include <lustre_dlm.h>
-#include <lustre_ver.h>
-//#include <lustre_mdc.h>
-#include <linux/lustre_acl.h>
+#include <lustre_eacl.h>
+#include <lustre_swab.h>
#include "llite_internal.h"
-#define XATTR_USER_PREFIX "user."
-#define XATTR_TRUSTED_PREFIX "trusted."
-#define XATTR_SECURITY_PREFIX "security."
-#define XATTR_LUSTRE_PREFIX "lustre."
-
-#define XATTR_USER_T (1)
-#define XATTR_TRUSTED_T (2)
-#define XATTR_SECURITY_T (3)
-#define XATTR_ACL_ACCESS_T (4)
-#define XATTR_ACL_DEFAULT_T (5)
-#define XATTR_LUSTRE_T (6)
-#define XATTR_OTHER_T (7)
-
-static
-int get_xattr_type(const char *name)
+#ifndef HAVE_XATTR_HANDLER_NAME
+static inline const char *xattr_prefix(const struct xattr_handler *handler)
{
- if (!strcmp(name, POSIX_ACL_XATTR_ACCESS))
- return XATTR_ACL_ACCESS_T;
-
- if (!strcmp(name, POSIX_ACL_XATTR_DEFAULT))
- return XATTR_ACL_DEFAULT_T;
+ return handler->prefix;
+}
+#endif
- if (!strncmp(name, XATTR_USER_PREFIX,
- sizeof(XATTR_USER_PREFIX) - 1))
- return XATTR_USER_T;
+#ifdef HAVE_LINUX_SELINUX_IS_ENABLED
+# define test_xattr_is_selinux_disabled(handler, name) \
+ ((handler)->flags == XATTR_SECURITY_T && \
+ !selinux_is_enabled() && \
+ strcmp((name), "selinux") == 0)
+#else
+# define test_xattr_is_selinux_disabled(handler, name) \
+ ((handler)->flags == XATTR_SECURITY_T && \
+ strcmp((name), "selinux") == 0)
+#endif
- if (!strncmp(name, XATTR_TRUSTED_PREFIX,
- sizeof(XATTR_TRUSTED_PREFIX) - 1))
- return XATTR_TRUSTED_T;
+const struct xattr_handler *get_xattr_type(const char *name)
+{
+ int i;
- if (!strncmp(name, XATTR_SECURITY_PREFIX,
- sizeof(XATTR_SECURITY_PREFIX) - 1))
- return XATTR_SECURITY_T;
+ for (i = 0; ll_xattr_handlers[i]; i++) {
+ const char *prefix = xattr_prefix(ll_xattr_handlers[i]);
+ size_t prefix_len = strlen(prefix);
- if (!strncmp(name, XATTR_LUSTRE_PREFIX,
- sizeof(XATTR_LUSTRE_PREFIX) - 1))
- return XATTR_LUSTRE_T;
+ if (!strncmp(prefix, name, prefix_len))
+ return ll_xattr_handlers[i];
+ }
- return XATTR_OTHER_T;
+ return NULL;
}
-static
-int xattr_type_filter(struct ll_sb_info *sbi, int xattr_type)
+static int xattr_type_filter(struct ll_sb_info *sbi,
+ const struct xattr_handler *handler)
{
- if ((xattr_type == XATTR_ACL_ACCESS_T ||
- xattr_type == XATTR_ACL_DEFAULT_T) &&
- !(sbi->ll_flags & LL_SBI_ACL))
- return -EOPNOTSUPP;
+ /* No handler means XATTR_OTHER_T */
+ if (!handler)
+ return -EOPNOTSUPP;
- if (xattr_type == XATTR_USER_T && !(sbi->ll_flags & LL_SBI_USER_XATTR))
- return -EOPNOTSUPP;
- if (xattr_type == XATTR_TRUSTED_T && !capable(CAP_SYS_ADMIN))
- return -EPERM;
- if (xattr_type == XATTR_OTHER_T)
+ if ((handler->flags == XATTR_ACL_ACCESS_T ||
+ handler->flags == XATTR_ACL_DEFAULT_T) &&
+ !(sbi->ll_flags & LL_SBI_ACL))
return -EOPNOTSUPP;
- return 0;
-}
+ if (handler->flags == XATTR_USER_T &&
+ !(sbi->ll_flags & LL_SBI_USER_XATTR))
+ return -EOPNOTSUPP;
-static
-int ll_setxattr_common(struct inode *inode, const char *name,
- const void *value, size_t size,
- int flags, __u64 valid)
-{
- struct ll_sb_info *sbi = ll_i2sbi(inode);
- struct ptlrpc_request *req;
- int xattr_type, rc;
- struct obd_capa *oc;
- posix_acl_xattr_header *new_value = NULL;
- struct rmtacl_ctl_entry *rce = NULL;
- ext_acl_xattr_header *acl = NULL;
- const char *pv = value;
- ENTRY;
-
- xattr_type = get_xattr_type(name);
- rc = xattr_type_filter(sbi, xattr_type);
- if (rc)
- RETURN(rc);
-
- /* b10667: ignore lustre special xattr for now */
- if ((xattr_type == XATTR_TRUSTED_T && strcmp(name, "trusted.lov") == 0) ||
- (xattr_type == XATTR_LUSTRE_T && strcmp(name, "lustre.lov") == 0))
- RETURN(0);
-
-#ifdef CONFIG_FS_POSIX_ACL
- if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
- (xattr_type == XATTR_ACL_ACCESS_T ||
- xattr_type == XATTR_ACL_DEFAULT_T)) {
- rce = rct_search(&sbi->ll_rct, cfs_curproc_pid());
- if (rce == NULL ||
- (rce->rce_ops != RMT_LSETFACL &&
- rce->rce_ops != RMT_RSETFACL))
- RETURN(-EOPNOTSUPP);
-
- if (rce->rce_ops == RMT_LSETFACL) {
- struct eacl_entry *ee;
-
- ee = et_search_del(&sbi->ll_et, cfs_curproc_pid(),
- ll_inode2fid(inode), xattr_type);
- LASSERT(ee != NULL);
- if (valid & OBD_MD_FLXATTR) {
- acl = lustre_acl_xattr_merge2ext(
- (posix_acl_xattr_header *)value,
- size, ee->ee_acl);
- if (IS_ERR(acl)) {
- ee_free(ee);
- RETURN(PTR_ERR(acl));
- }
- size = CFS_ACL_XATTR_SIZE(\
- le32_to_cpu(acl->a_count), \
- ext_acl_xattr);
- pv = (const char *)acl;
- }
- ee_free(ee);
- } else if (rce->rce_ops == RMT_RSETFACL) {
- size = lustre_posix_acl_xattr_filter(
- (posix_acl_xattr_header *)value,
- size, &new_value);
- if (unlikely(size < 0))
- RETURN(size);
-
- pv = (const char *)new_value;
- } else
- RETURN(-EOPNOTSUPP);
-
- valid |= rce_ops2valid(rce->rce_ops);
- }
-#endif
- oc = ll_mdscapa_get(inode);
- rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode), oc,
- valid, name, pv, size, 0, flags, ll_i2suppgid(inode),
- &req);
- capa_put(oc);
-#ifdef CONFIG_FS_POSIX_ACL
- if (new_value != NULL)
- lustre_posix_acl_xattr_free(new_value, size);
- if (acl != NULL)
- lustre_ext_acl_xattr_free(acl);
-#endif
- if (rc) {
- if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
- LCONSOLE_INFO("Disabling user_xattr feature because "
- "it is not supported on the server\n");
- sbi->ll_flags &= ~LL_SBI_USER_XATTR;
- }
- RETURN(rc);
- }
+ if (handler->flags == XATTR_TRUSTED_T &&
+ !capable(CFS_CAP_SYS_ADMIN))
+ return -EPERM;
- ptlrpc_req_finished(req);
- RETURN(0);
+ return 0;
}
-int ll_setxattr(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags)
+static int ll_xattr_set_common(const struct xattr_handler *handler,
+ struct dentry *dentry, struct inode *inode,
+ const char *name, const void *value, size_t size,
+ int flags)
{
- struct inode *inode = dentry->d_inode;
-
- LASSERT(inode);
- LASSERT(name);
-
- CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
- inode->i_ino, inode->i_generation, inode, name);
-
- ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETXATTR, 1);
-
- if ((strncmp(name, XATTR_TRUSTED_PREFIX,
- sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
- strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) ||
- (strncmp(name, XATTR_LUSTRE_PREFIX,
- sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
- strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
- struct lov_user_md *lump = (struct lov_user_md *)value;
- int rc = 0;
-
- if (S_ISREG(inode->i_mode)) {
- struct file f;
- int flags = FMODE_WRITE;
-
- f.f_dentry = dentry;
- rc = ll_lov_setstripe_ea_info(inode, &f, flags,
- lump, sizeof(*lump));
- /* b10667: rc always be 0 here for now */
- rc = 0;
- } else if (S_ISDIR(inode->i_mode)) {
- rc = ll_dir_setstripe(inode, lump, 0);
- }
-
- return rc;
- }
-
- return ll_setxattr_common(inode, name, value, size, flags,
- OBD_MD_FLXATTR);
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct ptlrpc_request *req = NULL;
+ const char *pv = value;
+ char *fullname;
+ ktime_t kstart = ktime_get();
+ u64 valid;
+ int rc;
+ ENTRY;
+
+ /* When setxattr() is called with a size of 0 the value is
+ * unconditionally replaced by "". When removexattr() is
+ * called we get a NULL value and XATTR_REPLACE for flags. */
+ if (!value && flags == XATTR_REPLACE)
+ valid = OBD_MD_FLXATTRRM;
+ else
+ valid = OBD_MD_FLXATTR;
+
+ /* FIXME: enable IMA when the conditions are ready */
+ if (handler->flags == XATTR_SECURITY_T &&
+ (!strcmp(name, "ima") || !strcmp(name, "evm")))
+ RETURN(-EOPNOTSUPP);
+
+ rc = xattr_type_filter(sbi, handler);
+ if (rc)
+ RETURN(rc);
+
+ if ((handler->flags == XATTR_ACL_ACCESS_T ||
+ handler->flags == XATTR_ACL_DEFAULT_T) &&
+ !inode_owner_or_capable(inode))
+ RETURN(-EPERM);
+
+ /* b10667: ignore lustre special xattr for now */
+ if (!strcmp(name, "hsm") ||
+ ((handler->flags == XATTR_TRUSTED_T && !strcmp(name, "lov")) ||
+ (handler->flags == XATTR_LUSTRE_T && !strcmp(name, "lov"))))
+ RETURN(0);
+
+ /* LU-549: Disable security.selinux when selinux is disabled */
+ if (test_xattr_is_selinux_disabled(handler, name))
+ RETURN(-EOPNOTSUPP);
+
+ /*
+ * In user.* namespace, only regular files and directories can have
+ * extended attributes.
+ */
+ if (handler->flags == XATTR_USER_T) {
+ if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
+ RETURN(-EPERM);
+ }
+
+ fullname = kasprintf(GFP_KERNEL, "%s%s", xattr_prefix(handler), name);
+ if (!fullname)
+ RETURN(-ENOMEM);
+
+ rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode), valid, fullname,
+ pv, size, flags, ll_i2suppgid(inode), &req);
+ kfree(fullname);
+ if (rc) {
+ if (rc == -EOPNOTSUPP && handler->flags == XATTR_USER_T) {
+ LCONSOLE_INFO("Disabling user_xattr feature because it is not supported on the server\n");
+ sbi->ll_flags &= ~LL_SBI_USER_XATTR;
+ }
+ RETURN(rc);
+ }
+
+ ptlrpc_req_finished(req);
+
+ ll_stats_ops_tally(ll_i2sbi(inode), valid == OBD_MD_FLXATTRRM ?
+ LPROC_LL_REMOVEXATTR : LPROC_LL_SETXATTR,
+ ktime_us_delta(ktime_get(), kstart));
+
+ RETURN(0);
}
-int ll_removexattr(struct dentry *dentry, const char *name)
+static int get_hsm_state(struct inode *inode, u32 *hus_states)
{
- struct inode *inode = dentry->d_inode;
+ struct md_op_data *op_data;
+ struct hsm_user_state *hus;
+ int rc;
+
+ OBD_ALLOC_PTR(hus);
+ if (!hus)
+ return -ENOMEM;
+
+ op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
+ LUSTRE_OPC_ANY, hus);
+ if (!IS_ERR(op_data)) {
+ rc = obd_iocontrol(LL_IOC_HSM_STATE_GET, ll_i2mdexp(inode),
+ sizeof(*op_data), op_data, NULL);
+ if (!rc)
+ *hus_states = hus->hus_states;
+ else
+ CDEBUG(D_VFSTRACE, "obd_iocontrol failed. rc = %d\n",
+ rc);
+
+ ll_finish_md_op_data(op_data);
+ } else {
+ rc = PTR_ERR(op_data);
+ CDEBUG(D_VFSTRACE, "Could not prepare the opdata. rc = %d\n",
+ rc);
+ }
+ OBD_FREE_PTR(hus);
+ return rc;
+}
- LASSERT(inode);
- LASSERT(name);
+static int ll_adjust_lum(struct inode *inode, struct lov_user_md *lump)
+{
+ struct lov_comp_md_v1 *comp_v1 = (struct lov_comp_md_v1 *)lump;
+ struct lov_user_md *v1 = lump;
+ bool need_clear_release = false;
+ bool release_checked = false;
+ bool is_composite = false;
+ u16 entry_count = 1;
+ int rc = 0;
+ int i;
+
+ if (!lump)
+ return 0;
+
+ if (lump->lmm_magic == LOV_USER_MAGIC_COMP_V1) {
+ entry_count = comp_v1->lcm_entry_count;
+ is_composite = true;
+ }
+
+ for (i = 0; i < entry_count; i++) {
+ if (lump->lmm_magic == LOV_USER_MAGIC_COMP_V1) {
+ void *ptr = comp_v1;
+
+ ptr += comp_v1->lcm_entries[i].lcme_offset;
+ v1 = (struct lov_user_md *)ptr;
+ }
+
+ /*
+ * Attributes that are saved via getxattr will always
+ * have the stripe_offset as 0. Instead, the MDS
+ * should be allowed to pick the starting OST index.
+ * b=17846
+ */
+ if (!is_composite && v1->lmm_stripe_offset == 0)
+ v1->lmm_stripe_offset = -1;
+
+ /* Avoid anyone directly setting the RELEASED flag. */
+ if (v1->lmm_pattern & LOV_PATTERN_F_RELEASED) {
+ if (!release_checked) {
+ u32 state = HS_NONE;
+
+ rc = get_hsm_state(inode, &state);
+ if (rc)
+ return rc;
+
+ if (!(state & HS_ARCHIVED))
+ need_clear_release = true;
+ release_checked = true;
+ }
+ if (need_clear_release)
+ v1->lmm_pattern ^= LOV_PATTERN_F_RELEASED;
+ }
+ }
+
+ return rc;
+}
- CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
- inode->i_ino, inode->i_generation, inode, name);
+static int ll_setstripe_ea(struct dentry *dentry, struct lov_user_md *lump,
+ size_t size)
+{
+ struct inode *inode = dentry->d_inode;
+ int rc = 0;
+
+ /*
+ * It is possible to set an xattr to a "" value of zero size.
+ * For this case we are going to treat it as a removal.
+ */
+ if (!size && lump)
+ lump = NULL;
+
+ if (size && size < sizeof(*lump)) {
+ /* ll_adjust_lum() or ll_lov_user_md_size() might access
+ * before size - just give up now.
+ */
+ return -ERANGE;
+ }
+ rc = ll_adjust_lum(inode, lump);
+ if (rc)
+ return rc;
+
+ if (lump && S_ISREG(inode->i_mode)) {
+ u64 it_flags = FMODE_WRITE;
+ ssize_t lum_size;
+
+ lum_size = ll_lov_user_md_size(lump);
+ if (lum_size < 0 || size < lum_size)
+ return -ERANGE;
+
+ rc = ll_lov_setstripe_ea_info(inode, dentry, it_flags, lump,
+ lum_size);
+ /**
+ * b=10667: ignore -EEXIST.
+ * Silently eat error on setting trusted.lov/lustre.lov
+ * attribute for platforms that added the default option
+ * to copy all attributes in 'cp' command. Both rsync and
+ * tar --xattrs also will try to set LOVEA for existing
+ * files.
+ */
+ if (rc == -EEXIST)
+ rc = 0;
+ } else if (S_ISDIR(inode->i_mode)) {
+ if (size != 0 && size < sizeof(struct lov_user_md))
+ return -EINVAL;
+
+ rc = ll_dir_setstripe(inode, lump, 0);
+ }
+
+ return rc;
+}
- ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_REMOVEXATTR, 1);
- return ll_setxattr_common(inode, name, NULL, 0, 0,
- OBD_MD_FLXATTRRM);
+static int ll_xattr_set(const struct xattr_handler *handler,
+ struct dentry *dentry, struct inode *inode,
+ const char *name, const void *value, size_t size,
+ int flags)
+{
+ ktime_t kstart = ktime_get();
+ int op_type = flags == XATTR_REPLACE ? LPROC_LL_REMOVEXATTR :
+ LPROC_LL_SETXATTR;
+ int rc;
+
+ LASSERT(inode);
+ LASSERT(name);
+
+ CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p), xattr %s\n",
+ PFID(ll_inode2fid(inode)), inode, name);
+
+ /* lustre/trusted.lov.xxx would be passed through xattr API */
+ if (!strcmp(name, "lov")) {
+ rc = ll_setstripe_ea(dentry, (struct lov_user_md *)value,
+ size);
+ ll_stats_ops_tally(ll_i2sbi(inode), op_type,
+ ktime_us_delta(ktime_get(), kstart));
+ return rc;
+ } else if (!strcmp(name, "lma") || !strcmp(name, "link")) {
+ ll_stats_ops_tally(ll_i2sbi(inode), op_type,
+ ktime_us_delta(ktime_get(), kstart));
+ return 0;
+ }
+
+ if (strncmp(name, "lov.", 4) == 0 &&
+ (__swab32(((struct lov_user_md *)value)->lmm_magic) &
+ le32_to_cpu(LOV_MAGIC_MASK)) == le32_to_cpu(LOV_MAGIC_MAGIC))
+ lustre_swab_lov_user_md((struct lov_user_md *)value, 0);
+
+ return ll_xattr_set_common(handler, dentry, inode, name, value, size,
+ flags);
}
-static
-int ll_getxattr_common(struct inode *inode, const char *name,
- void *buffer, size_t size, __u64 valid)
+int ll_xattr_list(struct inode *inode, const char *name, int type, void *buffer,
+ size_t size, u64 valid)
{
+ struct ll_inode_info *lli = ll_i2info(inode);
struct ll_sb_info *sbi = ll_i2sbi(inode);
struct ptlrpc_request *req = NULL;
- struct mdt_body *body;
- int xattr_type, rc;
void *xdata;
- struct obd_capa *oc;
- struct rmtacl_ctl_entry *rce = NULL;
- ENTRY;
-
- CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
- inode->i_ino, inode->i_generation, inode);
-
- /* listxattr have slightly different behavior from of ext3:
- * without 'user_xattr' ext3 will list all xattr names but
- * filtered out "^user..*"; we list them all for simplicity.
- */
- if (!name) {
- xattr_type = XATTR_OTHER_T;
- goto do_getxattr;
- }
-
- xattr_type = get_xattr_type(name);
- rc = xattr_type_filter(sbi, xattr_type);
- if (rc)
- RETURN(rc);
-
-#ifdef CONFIG_FS_POSIX_ACL
- if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
- (xattr_type == XATTR_ACL_ACCESS_T ||
- xattr_type == XATTR_ACL_DEFAULT_T)) {
- rce = rct_search(&sbi->ll_rct, cfs_curproc_pid());
- if (rce == NULL ||
- (rce->rce_ops != RMT_LSETFACL &&
- rce->rce_ops != RMT_LGETFACL &&
- rce->rce_ops != RMT_RSETFACL &&
- rce->rce_ops != RMT_RGETFACL))
- RETURN(-EOPNOTSUPP);
- }
-#endif
+ int rc;
+ ENTRY;
+
+ if (sbi->ll_xattr_cache_enabled && type != XATTR_ACL_ACCESS_T &&
+ (type != XATTR_SECURITY_T || strcmp(name, "security.selinux"))) {
+ rc = ll_xattr_cache_get(inode, name, buffer, size, valid);
+ if (rc == -EAGAIN)
+ goto getxattr_nocache;
+ if (rc < 0)
+ GOTO(out_xattr, rc);
+
+ /* Add "system.posix_acl_access" to the list */
+ if (lli->lli_posix_acl && valid & OBD_MD_FLXATTRLS) {
+ if (size == 0) {
+ rc += sizeof(XATTR_NAME_ACL_ACCESS);
+ } else if (size - rc >= sizeof(XATTR_NAME_ACL_ACCESS)) {
+ memcpy(buffer + rc, XATTR_NAME_ACL_ACCESS,
+ sizeof(XATTR_NAME_ACL_ACCESS));
+ rc += sizeof(XATTR_NAME_ACL_ACCESS);
+ } else {
+ GOTO(out_xattr, rc = -ERANGE);
+ }
+ }
+ } else {
+getxattr_nocache:
+ rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode), valid,
+ name, size, &req);
+ if (rc < 0)
+ GOTO(out_xattr, rc);
+
+ /* only detect the xattr size */
+ if (size == 0)
+ GOTO(out, rc);
+
+ if (size < rc)
+ GOTO(out, rc = -ERANGE);
+
+ /* do not need swab xattr data */
+ xdata = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA,
+ rc);
+ if (!xdata)
+ GOTO(out, rc = -EPROTO);
+
+ memcpy(buffer, xdata, rc);
+ }
+
+ EXIT;
+
+out_xattr:
+ if (rc == -EOPNOTSUPP && type == XATTR_USER_T) {
+ LCONSOLE_INFO("%s: disabling user_xattr feature because "
+ "it is not supported on the server: rc = %d\n",
+ sbi->ll_fsname, rc);
+ sbi->ll_flags &= ~LL_SBI_USER_XATTR;
+ }
+out:
+ ptlrpc_req_finished(req);
+ RETURN(rc);
+}
- /* posix acl is under protection of LOOKUP lock. when calling to this,
- * we just have path resolution to the target inode, so we have great
- * chance that cached ACL is uptodate.
- */
-#ifdef CONFIG_FS_POSIX_ACL
- if (xattr_type == XATTR_ACL_ACCESS_T &&
- !(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
- struct ll_inode_info *lli = ll_i2info(inode);
- struct posix_acl *acl;
-
- spin_lock(&lli->lli_lock);
- acl = posix_acl_dup(lli->lli_posix_acl);
- spin_unlock(&lli->lli_lock);
-
- if (!acl)
- RETURN(-ENODATA);
-
- rc = posix_acl_to_xattr(acl, buffer, size);
- posix_acl_release(acl);
- RETURN(rc);
- }
- if (xattr_type == XATTR_ACL_DEFAULT_T && !S_ISDIR(inode->i_mode))
- RETURN(-ENODATA);
+static int ll_xattr_get_common(const struct xattr_handler *handler,
+ struct dentry *dentry,
+ struct inode *inode,
+ const char *name, void *buffer, size_t size)
+{
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ ktime_t kstart = ktime_get();
+ char *fullname;
+ int rc;
+
+ ENTRY;
+
+ rc = xattr_type_filter(sbi, handler);
+ if (rc)
+ RETURN(rc);
+
+ /* LU-549: Disable security.selinux when selinux is disabled */
+ if (test_xattr_is_selinux_disabled(handler, name))
+ RETURN(-EOPNOTSUPP);
+
+#ifdef CONFIG_LUSTRE_FS_POSIX_ACL
+ /* posix acl is under protection of LOOKUP lock. when calling to this,
+ * we just have path resolution to the target inode, so we have great
+ * chance that cached ACL is uptodate.
+ */
+ if (handler->flags == XATTR_ACL_ACCESS_T) {
+ struct ll_inode_info *lli = ll_i2info(inode);
+ struct posix_acl *acl;
+
+ spin_lock(&lli->lli_lock);
+ acl = posix_acl_dup(lli->lli_posix_acl);
+ spin_unlock(&lli->lli_lock);
+
+ if (!acl)
+ RETURN(-ENODATA);
+
+ rc = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
+ posix_acl_release(acl);
+ RETURN(rc);
+ }
+ if (handler->flags == XATTR_ACL_DEFAULT_T && !S_ISDIR(inode->i_mode))
+ RETURN(-ENODATA);
#endif
-do_getxattr:
- oc = ll_mdscapa_get(inode);
- rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode), oc,
- valid | (rce ? rce_ops2valid(rce->rce_ops) : 0),
- name, NULL, 0, size, 0, &req);
- capa_put(oc);
- if (rc) {
- if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
- LCONSOLE_INFO("Disabling user_xattr feature because "
- "it is not supported on the server\n");
- sbi->ll_flags &= ~LL_SBI_USER_XATTR;
- }
- RETURN(rc);
- }
-
- body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
- LASSERT(body);
-
- /* only detect the xattr size */
- if (size == 0)
- GOTO(out, rc = body->eadatasize);
-
- if (size < body->eadatasize) {
- CERROR("server bug: replied size %u > %u\n",
- body->eadatasize, (int)size);
- GOTO(out, rc = -ERANGE);
- }
-
- /* do not need swab xattr data */
- xdata = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA,
- body->eadatasize);
- if (!xdata)
- GOTO(out, rc = -EFAULT);
-
-#ifdef CONFIG_FS_POSIX_ACL
- if (body->eadatasize >= 0 && rce && rce->rce_ops == RMT_LSETFACL) {
- ext_acl_xattr_header *acl;
-
- acl = lustre_posix_acl_xattr_2ext((posix_acl_xattr_header *)xdata,
- body->eadatasize);
- if (IS_ERR(acl))
- GOTO(out, rc = PTR_ERR(acl));
-
- rc = ee_add(&sbi->ll_et, cfs_curproc_pid(), ll_inode2fid(inode),
- xattr_type, acl);
- if (unlikely(rc < 0)) {
- lustre_ext_acl_xattr_free(acl);
- GOTO(out, rc);
- }
- }
-
- if (xattr_type == XATTR_ACL_ACCESS_T && !body->eadatasize)
- GOTO(out, rc = -ENODATA);
-#endif
- LASSERT(buffer);
- memcpy(buffer, xdata, body->eadatasize);
- rc = body->eadatasize;
- EXIT;
-out:
- ptlrpc_req_finished(req);
- return rc;
+ fullname = kasprintf(GFP_KERNEL, "%s%s", xattr_prefix(handler), name);
+ if (!fullname)
+ RETURN(-ENOMEM);
+
+ rc = ll_xattr_list(inode, fullname, handler->flags, buffer, size,
+ OBD_MD_FLXATTR);
+ kfree(fullname);
+ ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR,
+ ktime_us_delta(ktime_get(), kstart));
+
+ RETURN(rc);
}
-ssize_t ll_getxattr(struct dentry *dentry, const char *name,
- void *buffer, size_t size)
+static ssize_t ll_getxattr_lov(struct inode *inode, void *buf, size_t buf_size)
{
- struct inode *inode = dentry->d_inode;
-
- LASSERT(inode);
- LASSERT(name);
-
- CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
- inode->i_ino, inode->i_generation, inode, name);
-
- ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR, 1);
-
- if ((strncmp(name, XATTR_TRUSTED_PREFIX,
- sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
- strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) ||
- (strncmp(name, XATTR_LUSTRE_PREFIX,
- sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
- strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
- struct lov_user_md *lump;
- struct lov_mds_md *lmm = NULL;
- struct ptlrpc_request *request = NULL;
- int rc = 0, lmmsize;
-
- if (S_ISREG(inode->i_mode)) {
- rc = ll_lov_getstripe_ea_info(dentry->d_parent->d_inode,
- dentry->d_name.name, &lmm,
- &lmmsize, &request);
- } else if (S_ISDIR(inode->i_mode)) {
- rc = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
- }
-
- if (rc < 0)
- GOTO(out, rc);
- if (size == 0)
- GOTO(out, rc = lmmsize);
-
- if (size < lmmsize) {
- CERROR("server bug: replied size %u > %u\n",
- lmmsize, (int)size);
- GOTO(out, rc = -ERANGE);
- }
-
- lump = (struct lov_user_md *)buffer;
- memcpy(lump, lmm, lmmsize);
-
- rc = lmmsize;
-out:
- ptlrpc_req_finished(request);
- return(rc);
- }
+ ssize_t rc;
+
+ if (S_ISREG(inode->i_mode)) {
+ struct cl_object *obj = ll_i2info(inode)->lli_clob;
+ struct cl_layout cl = {
+ .cl_buf.lb_buf = buf,
+ .cl_buf.lb_len = buf_size,
+ };
+ struct lu_env *env;
+ u16 refcheck;
+
+ if (!obj)
+ RETURN(-ENODATA);
+
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env))
+ RETURN(PTR_ERR(env));
+
+ rc = cl_object_layout_get(env, obj, &cl);
+ if (rc < 0)
+ GOTO(out_env, rc);
+
+ if (!cl.cl_size)
+ GOTO(out_env, rc = -ENODATA);
+
+ rc = cl.cl_size;
+
+ if (!buf_size)
+ GOTO(out_env, rc);
+
+ LASSERT(buf && rc <= buf_size);
+
+ /*
+ * Do not return layout gen for getxattr() since
+ * otherwise it would confuse tar --xattr by
+ * recognizing layout gen as stripe offset when the
+ * file is restored. See LU-2809.
+ */
+ if ((((struct lov_mds_md *)buf)->lmm_magic &
+ __swab32(LOV_MAGIC_MAGIC)) == __swab32(LOV_MAGIC_MAGIC))
+ lustre_swab_lov_user_md((struct lov_user_md *)buf,
+ cl.cl_size);
+
+ switch (((struct lov_mds_md *)buf)->lmm_magic) {
+ case LOV_MAGIC_V1:
+ case LOV_MAGIC_V3:
+ case LOV_MAGIC_SPECIFIC:
+ ((struct lov_mds_md *)buf)->lmm_layout_gen = 0;
+ break;
+ case LOV_MAGIC_COMP_V1:
+ case LOV_MAGIC_FOREIGN:
+ goto out_env;
+ default:
+ CERROR("Invalid LOV magic %08x\n",
+ ((struct lov_mds_md *)buf)->lmm_magic);
+ GOTO(out_env, rc = -EINVAL);
+ }
+
+out_env:
+ cl_env_put(env, &refcheck);
+
+ RETURN(rc);
+ } else if (S_ISDIR(inode->i_mode)) {
+ struct ptlrpc_request *req = NULL;
+ struct ptlrpc_request *root_req = NULL;
+ struct lov_mds_md *lmm = NULL;
+ int lmm_size = 0;
+
+ rc = ll_dir_getstripe_default(inode, (void **)&lmm, &lmm_size,
+ &req, &root_req, 0);
+ if (rc < 0)
+ GOTO(out_req, rc);
+
+ if (!buf_size)
+ GOTO(out_req, rc = lmm_size);
+
+ if (buf_size < lmm_size)
+ GOTO(out_req, rc = -ERANGE);
+
+ memcpy(buf, lmm, lmm_size);
+ GOTO(out_req, rc = lmm_size);
+out_req:
+ if (req)
+ ptlrpc_req_finished(req);
+ if (root_req)
+ ptlrpc_req_finished(root_req);
+
+ RETURN(rc);
+ } else {
+ RETURN(-ENODATA);
+ }
+}
+
+static int ll_xattr_get(const struct xattr_handler *handler,
+ struct dentry *dentry, struct inode *inode,
+ const char *name, void *buffer, size_t size)
+{
+ LASSERT(inode);
+ LASSERT(name);
+
+ CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), xattr %s\n",
+ PFID(ll_inode2fid(inode)), inode, name);
+
+ if (!strcmp(name, "lov")) {
+ ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR, 1);
- return ll_getxattr_common(inode, name, buffer, size, OBD_MD_FLXATTR);
+ return ll_getxattr_lov(inode, buffer, size);
+ }
+
+ return ll_xattr_get_common(handler, dentry, inode, name, buffer, size);
}
ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
{
- struct inode *inode = dentry->d_inode;
- int rc = 0, rc2 = 0;
- struct lov_mds_md *lmm = NULL;
- struct ptlrpc_request *request = NULL;
- int lmmsize;
-
- LASSERT(inode);
-
- CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
- inode->i_ino, inode->i_generation, inode);
-
- ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LISTXATTR, 1);
-
- rc = ll_getxattr_common(inode, NULL, buffer, size, OBD_MD_FLXATTRLS);
-
- if (S_ISREG(inode->i_mode)) {
- struct ll_inode_info *lli = ll_i2info(inode);
- struct lov_stripe_md *lsm = NULL;
- lsm = lli->lli_smd;
- if (lsm == NULL)
- rc2 = -1;
- } else if (S_ISDIR(inode->i_mode)) {
- rc2 = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
- }
-
- if (rc2 < 0) {
- GOTO(out, rc2 = 0);
- } else {
- const int prefix_len = sizeof(XATTR_LUSTRE_PREFIX) - 1;
- const size_t name_len = sizeof("lov") - 1;
- const size_t total_len = prefix_len + name_len + 1;
-
- if (buffer && (rc + total_len) <= size) {
- buffer += rc;
- memcpy(buffer,XATTR_LUSTRE_PREFIX, prefix_len);
- memcpy(buffer+prefix_len, "lov", name_len);
- buffer[prefix_len + name_len] = '\0';
- }
- rc2 = total_len;
- }
+ struct inode *inode = dentry->d_inode;
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ ktime_t kstart = ktime_get();
+ char *xattr_name;
+ ssize_t rc, rc2;
+ size_t len, rem;
+
+ LASSERT(inode);
+
+ CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
+ PFID(ll_inode2fid(inode)), inode);
+
+ rc = ll_xattr_list(inode, NULL, XATTR_OTHER_T, buffer, size,
+ OBD_MD_FLXATTRLS);
+ if (rc < 0)
+ RETURN(rc);
+
+ /*
+ * If we're being called to get the size of the xattr list
+ * (size == 0) then just assume that a lustre.lov xattr
+ * exists.
+ */
+ if (!size)
+ goto out;
+
+ xattr_name = buffer;
+ rem = rc;
+
+ while (rem > 0) {
+ len = strnlen(xattr_name, rem - 1) + 1;
+ rem -= len;
+ if (!xattr_type_filter(sbi, get_xattr_type(xattr_name))) {
+ /* Skip OK xattr type, leave it in buffer. */
+ xattr_name += len;
+ continue;
+ }
+
+ /*
+ * Move up remaining xattrs in buffer
+ * removing the xattr that is not OK.
+ */
+ memmove(xattr_name, xattr_name + len, rem);
+ rc -= len;
+ }
+
+ rc2 = ll_getxattr_lov(inode, NULL, 0);
+ if (rc2 == -ENODATA)
+ RETURN(rc);
+
+ if (rc2 < 0)
+ RETURN(rc2);
+
+ if (size < rc + sizeof(XATTR_LUSTRE_LOV))
+ RETURN(-ERANGE);
+
+ memcpy(buffer + rc, XATTR_LUSTRE_LOV, sizeof(XATTR_LUSTRE_LOV));
+
out:
- ptlrpc_req_finished(request);
- rc = rc + rc2;
-
- return rc;
+ ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LISTXATTR,
+ ktime_us_delta(ktime_get(), kstart));
+
+ RETURN(rc + sizeof(XATTR_LUSTRE_LOV));
+}
+
+#ifdef HAVE_XATTR_HANDLER_SIMPLIFIED
+static int ll_xattr_get_common_4_3(const struct xattr_handler *handler,
+ struct dentry *dentry, const char *name,
+ void *buffer, size_t size)
+{
+ return ll_xattr_get_common(handler, dentry, dentry->d_inode, name,
+ buffer, size);
+}
+
+static int ll_xattr_get_4_3(const struct xattr_handler *handler,
+ struct dentry *dentry, const char *name,
+ void *buffer, size_t size)
+{
+ return ll_xattr_get(handler, dentry, dentry->d_inode, name, buffer,
+ size);
+}
+
+static int ll_xattr_set_common_4_3(const struct xattr_handler *handler,
+ struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
+{
+ return ll_xattr_set_common(handler, dentry, dentry->d_inode, name,
+ value, size, flags);
+}
+
+static int ll_xattr_set_4_3(const struct xattr_handler *handler,
+ struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
+{
+ return ll_xattr_set(handler, dentry, dentry->d_inode, name, value,
+ size, flags);
+}
+
+#elif !defined(HAVE_XATTR_HANDLER_INODE_PARAM)
+const struct xattr_handler *get_xattr_handler(int handler_flag)
+{
+ int i = 0;
+
+ while (ll_xattr_handlers[i]) {
+ if (ll_xattr_handlers[i]->flags == handler_flag)
+ return ll_xattr_handlers[i];
+ i++;
+ }
+ return NULL;
+}
+
+static int ll_xattr_get_common_3_11(struct dentry *dentry, const char *name,
+ void *buffer, size_t size, int handler_flags)
+{
+ const struct xattr_handler *handler = get_xattr_handler(handler_flags);
+
+ if (!handler)
+ return -ENXIO;
+
+ return ll_xattr_get_common(handler, dentry, dentry->d_inode, name,
+ buffer, size);
+}
+
+static int ll_xattr_get_3_11(struct dentry *dentry, const char *name,
+ void *buffer, size_t size, int handler_flags)
+{
+ const struct xattr_handler *handler = get_xattr_handler(handler_flags);
+
+ if (!handler)
+ return -ENXIO;
+
+ return ll_xattr_get(handler, dentry, dentry->d_inode, name, buffer,
+ size);
}
+static int ll_xattr_set_common_3_11(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags,
+ int handler_flags)
+{
+ const struct xattr_handler *handler = get_xattr_handler(handler_flags);
+
+ if (!handler)
+ return -ENXIO;
+
+ return ll_xattr_set_common(handler, dentry, dentry->d_inode, name,
+ value, size, flags);
+}
+
+static int ll_xattr_set_3_11(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags,
+ int handler_flags)
+{
+ const struct xattr_handler *handler = get_xattr_handler(handler_flags);
+
+ if (!handler)
+ return -ENXIO;
+
+ return ll_xattr_set(handler, dentry, dentry->d_inode, name, value,
+ size, flags);
+}
+#endif
+
+static const struct xattr_handler ll_user_xattr_handler = {
+ .prefix = XATTR_USER_PREFIX,
+ .flags = XATTR_USER_T,
+#if defined(HAVE_XATTR_HANDLER_SIMPLIFIED)
+ .get = ll_xattr_get_common_4_3,
+ .set = ll_xattr_set_common_4_3,
+#elif !defined(HAVE_XATTR_HANDLER_INODE_PARAM)
+ .get = ll_xattr_get_common_3_11,
+ .set = ll_xattr_set_common_3_11,
+#else
+ .get = ll_xattr_get_common,
+ .set = ll_xattr_set_common,
+#endif
+};
+
+static const struct xattr_handler ll_trusted_xattr_handler = {
+ .prefix = XATTR_TRUSTED_PREFIX,
+ .flags = XATTR_TRUSTED_T,
+#if defined(HAVE_XATTR_HANDLER_SIMPLIFIED)
+ .get = ll_xattr_get_4_3,
+ .set = ll_xattr_set_4_3,
+#elif !defined(HAVE_XATTR_HANDLER_INODE_PARAM)
+ .get = ll_xattr_get_3_11,
+ .set = ll_xattr_set_3_11,
+#else
+ .get = ll_xattr_get,
+ .set = ll_xattr_set,
+#endif
+};
+
+static const struct xattr_handler ll_security_xattr_handler = {
+ .prefix = XATTR_SECURITY_PREFIX,
+ .flags = XATTR_SECURITY_T,
+#if defined(HAVE_XATTR_HANDLER_SIMPLIFIED)
+ .get = ll_xattr_get_common_4_3,
+ .set = ll_xattr_set_common_4_3,
+#elif !defined(HAVE_XATTR_HANDLER_INODE_PARAM)
+ .get = ll_xattr_get_common_3_11,
+ .set = ll_xattr_set_common_3_11,
+#else
+ .get = ll_xattr_get_common,
+ .set = ll_xattr_set_common,
+#endif
+};
+
+static const struct xattr_handler ll_acl_access_xattr_handler = {
+#ifdef HAVE_XATTR_HANDLER_NAME
+ .name = XATTR_NAME_POSIX_ACL_ACCESS,
+#else
+ .prefix = XATTR_NAME_POSIX_ACL_ACCESS,
+#endif
+ .flags = XATTR_ACL_ACCESS_T,
+#if defined(HAVE_XATTR_HANDLER_SIMPLIFIED)
+ .get = ll_xattr_get_common_4_3,
+ .set = ll_xattr_set_common_4_3,
+#elif !defined(HAVE_XATTR_HANDLER_INODE_PARAM)
+ .get = ll_xattr_get_common_3_11,
+ .set = ll_xattr_set_common_3_11,
+#else
+ .get = ll_xattr_get_common,
+ .set = ll_xattr_set_common,
+#endif
+};
+
+static const struct xattr_handler ll_acl_default_xattr_handler = {
+#ifdef HAVE_XATTR_HANDLER_NAME
+ .name = XATTR_NAME_POSIX_ACL_DEFAULT,
+#else
+ .prefix = XATTR_NAME_POSIX_ACL_DEFAULT,
+#endif
+ .flags = XATTR_ACL_DEFAULT_T,
+#if defined(HAVE_XATTR_HANDLER_SIMPLIFIED)
+ .get = ll_xattr_get_common_4_3,
+ .set = ll_xattr_set_common_4_3,
+#elif !defined(HAVE_XATTR_HANDLER_INODE_PARAM)
+ .get = ll_xattr_get_common_3_11,
+ .set = ll_xattr_set_common_3_11,
+#else
+ .get = ll_xattr_get_common,
+ .set = ll_xattr_set_common,
+#endif
+};
+
+static const struct xattr_handler ll_lustre_xattr_handler = {
+ .prefix = XATTR_LUSTRE_PREFIX,
+ .flags = XATTR_LUSTRE_T,
+#if defined(HAVE_XATTR_HANDLER_SIMPLIFIED)
+ .get = ll_xattr_get_4_3,
+ .set = ll_xattr_set_4_3,
+#elif !defined(HAVE_XATTR_HANDLER_INODE_PARAM)
+ .get = ll_xattr_get_3_11,
+ .set = ll_xattr_set_3_11,
+#else
+ .get = ll_xattr_get,
+ .set = ll_xattr_set,
+#endif
+};
+
+const struct xattr_handler *ll_xattr_handlers[] = {
+ &ll_user_xattr_handler,
+ &ll_trusted_xattr_handler,
+ &ll_security_xattr_handler,
+#ifdef CONFIG_LUSTRE_FS_POSIX_ACL
+ &ll_acl_access_xattr_handler,
+ &ll_acl_default_xattr_handler,
+#endif
+ &ll_lustre_xattr_handler,
+ NULL,
+};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff