--- /dev/null
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * 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
+ * http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2016, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ */
+
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/xattr.h>
+#include <linux/selinux.h>
+
+#define DEBUG_SUBSYSTEM S_LLITE
+
+#include <obd_support.h>
+#include <lustre_dlm.h>
+#include <lustre_ver.h>
+#include <lustre_eacl.h>
+
+#include "llite_internal.h"
+
+/* xattr related to IMA(Integrity Measurement Architecture) */
+#ifndef XATTR_NAME_IMA
+#define XATTR_NAME_IMA "security.ima"
+#endif
+#ifndef XATTR_NAME_EVM
+#define XATTR_NAME_EVM "security.evm"
+#endif
+
+static
+int get_xattr26_type(const char *name)
+{
+ if (!strcmp(name, XATTR_NAME_POSIX_ACL_ACCESS))
+ return XATTR_ACL_ACCESS_T;
+
+ if (!strcmp(name, XATTR_NAME_POSIX_ACL_DEFAULT))
+ return XATTR_ACL_DEFAULT_T;
+
+ if (!strncmp(name, XATTR_USER_PREFIX,
+ sizeof(XATTR_USER_PREFIX) - 1))
+ return XATTR_USER_T;
+
+ if (!strncmp(name, XATTR_TRUSTED_PREFIX,
+ sizeof(XATTR_TRUSTED_PREFIX) - 1))
+ return XATTR_TRUSTED_T;
+
+ if (!strncmp(name, XATTR_SECURITY_PREFIX,
+ sizeof(XATTR_SECURITY_PREFIX) - 1))
+ return XATTR_SECURITY_T;
+
+ if (!strncmp(name, XATTR_LUSTRE_PREFIX,
+ sizeof(XATTR_LUSTRE_PREFIX) - 1))
+ return XATTR_LUSTRE_T;
+
+ return XATTR_OTHER_T;
+}
+
+static
+int xattr_type_filter(struct ll_sb_info *sbi, int xattr_type)
+{
+ if ((xattr_type == XATTR_ACL_ACCESS_T ||
+ xattr_type == XATTR_ACL_DEFAULT_T) &&
+ !(sbi->ll_flags & LL_SBI_ACL))
+ return -EOPNOTSUPP;
+
+ if (xattr_type == XATTR_USER_T && !(sbi->ll_flags & LL_SBI_USER_XATTR))
+ return -EOPNOTSUPP;
+ if (xattr_type == XATTR_TRUSTED_T && !cfs_capable(CFS_CAP_SYS_ADMIN))
+ return -EPERM;
+ if (xattr_type == XATTR_OTHER_T)
+ return -EOPNOTSUPP;
+
+ return 0;
+}
+
+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 = NULL;
+ int xattr_type, rc;
+ const char *pv = value;
+ ENTRY;
+
+ /*FIXME: enable IMA when the conditions are ready */
+ if (strncmp(name, XATTR_NAME_IMA,
+ sizeof(XATTR_NAME_IMA)) == 0 ||
+ strncmp(name, XATTR_NAME_EVM,
+ sizeof(XATTR_NAME_EVM)) == 0)
+ return -EOPNOTSUPP;
+
+ xattr_type = get_xattr26_type(name);
+ rc = xattr_type_filter(sbi, xattr_type);
+ if (rc)
+ RETURN(rc);
+
+ if ((xattr_type == XATTR_ACL_ACCESS_T ||
+ xattr_type == XATTR_ACL_DEFAULT_T) &&
+#ifdef HAVE_INODE_OWNER_OR_CAPABLE
+ !inode_owner_or_capable(inode))
+#else
+ !is_owner_or_cap(inode))
+#endif
+ return -EPERM;
+
+ /* b10667: ignore lustre special xattr for now */
+ if (strcmp(name, XATTR_NAME_HSM) == 0 ||
+ (xattr_type == XATTR_TRUSTED_T &&
+ strcmp(name, XATTR_NAME_LOV) == 0) ||
+ (xattr_type == XATTR_LUSTRE_T &&
+ strcmp(name, "lustre.lov") == 0))
+ RETURN(0);
+
+ /* LU-549: Disable security.selinux when selinux is disabled */
+ if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
+ strcmp(name, "security.selinux") == 0)
+ RETURN(-EOPNOTSUPP);
+
+ /* In user.* namespace, only regular files and directories can have
+ * extended attributes. */
+ if (xattr_type == XATTR_USER_T) {
+ if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
+ RETURN(-EPERM);
+ }
+
+ rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode), valid, name, pv,
+ size, 0, flags, ll_i2suppgid(inode), &req);
+ 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);
+ }
+
+ ptlrpc_req_finished(req);
+ RETURN(0);
+}
+
+static int get_hsm_state(struct inode *inode, __u32 *hus_states)
+{
+ struct md_op_data *op_data;
+ struct hsm_user_state *hus;
+ int rc;
+
+ OBD_ALLOC_PTR(hus);
+ if (hus == NULL)
+ 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 == 0)
+ *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;
+}
+
+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 release_checked = false;
+ bool need_clear_release = false;
+ __u16 entry_count = 1;
+ bool is_composite = false;
+ int rc = 0;
+ int i;
+
+ if (lump == NULL)
+ 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)
+ v1 = (struct lov_user_md *)((char *)comp_v1 +
+ comp_v1->lcm_entries[i].lcme_offset);
+
+ /* 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;
+}
+
+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;
+
+ rc = ll_adjust_lum(inode, lump);
+ if (rc)
+ return rc;
+
+ if (lump != NULL && S_ISREG(inode->i_mode)) {
+ u64 it_flags = FMODE_WRITE;
+ int 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 SuSE 9, it added default option to copy
+ * all attributes in 'cp' command. rsync, tar --xattrs
+ * also will try to set LOVEA for existing files.
+ */
+ if (rc == -EEXIST)
+ rc = 0;
+ } else if (S_ISDIR(inode->i_mode)) {
+ rc = ll_dir_setstripe(inode, lump, 0);
+ }
+
+ return rc;
+}
+
+int ll_setxattr(struct dentry *dentry, 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="DFID"(%p), xattr %s\n",
+ PFID(ll_inode2fid(inode)), inode, name);
+
+ ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETXATTR, 1);
+
+ /* lustre/trusted.lov.xxx would be passed through xattr API */
+ if (strcmp(name, XATTR_NAME_LOV) == 0 ||
+ strcmp(name, XATTR_LUSTRE_LOV) == 0)
+ return ll_setstripe_ea(dentry, (struct lov_user_md *)value,
+ size);
+ else if (strcmp(name, XATTR_NAME_LMA) == 0 ||
+ strcmp(name, XATTR_NAME_LINK) == 0)
+ return 0;
+
+ return ll_setxattr_common(inode, name, value, size, flags,
+ OBD_MD_FLXATTR);
+}
+
+int ll_removexattr(struct dentry *dentry, const char *name)
+{
+ struct inode *inode = dentry->d_inode;
+
+ LASSERT(inode);
+ LASSERT(name);
+
+ CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), xattr %s\n",
+ PFID(ll_inode2fid(inode)), inode, name);
+
+ ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_REMOVEXATTR, 1);
+ return ll_setxattr_common(inode, name, NULL, 0, 0,
+ OBD_MD_FLXATTRRM);
+}
+
+int ll_getxattr_common(struct inode *inode, const char *name,
+ void *buffer, size_t size, __u64 valid)
+{
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct ptlrpc_request *req = NULL;
+ struct mdt_body *body;
+ int xattr_type, rc;
+ void *xdata;
+ struct ll_inode_info *lli = ll_i2info(inode);
+ ENTRY;
+
+ CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
+ PFID(ll_inode2fid(inode)), 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_xattr26_type(name);
+ rc = xattr_type_filter(sbi, xattr_type);
+ if (rc)
+ RETURN(rc);
+
+ /* LU-549: Disable security.selinux when selinux is disabled */
+ if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
+ strcmp(name, "security.selinux") == 0)
+ RETURN(-EOPNOTSUPP);
+
+#ifdef CONFIG_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 (xattr_type == XATTR_ACL_ACCESS_T) {
+ 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 (xattr_type == XATTR_ACL_DEFAULT_T && !S_ISDIR(inode->i_mode))
+ RETURN(-ENODATA);
+#endif
+
+do_getxattr:
+ if (sbi->ll_xattr_cache_enabled &&
+ xattr_type != XATTR_ACL_ACCESS_T &&
+ (xattr_type != XATTR_SECURITY_T ||
+ strcmp(name, "security.selinux") != 0)) {
+ 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 != NULL && 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, NULL, 0, size, 0, &req);
+
+ if (rc < 0)
+ GOTO(out_xattr, 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->mbo_eadatasize);
+
+ if (size < body->mbo_eadatasize) {
+ CERROR("server bug: replied size %u > %u\n",
+ body->mbo_eadatasize, (int)size);
+ GOTO(out, rc = -ERANGE);
+ }
+
+ if (body->mbo_eadatasize == 0)
+ GOTO(out, rc = -ENODATA);
+
+ /* do not need swab xattr data */
+ xdata = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA,
+ body->mbo_eadatasize);
+ if (!xdata)
+ GOTO(out, rc = -EFAULT);
+
+ memcpy(buffer, xdata, body->mbo_eadatasize);
+ rc = body->mbo_eadatasize;
+ }
+
+ EXIT;
+
+out_xattr:
+ if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
+ LCONSOLE_INFO("%s: disabling user_xattr feature because "
+ "it is not supported on the server: rc = %d\n",
+ ll_get_fsname(inode->i_sb, NULL, 0), rc);
+ sbi->ll_flags &= ~LL_SBI_USER_XATTR;
+ }
+out:
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+static ssize_t ll_getxattr_lov(struct inode *inode, void *buf, size_t buf_size)
+{
+ ssize_t rc;
+
+ if (S_ISREG(inode->i_mode)) {
+ struct cl_object *obj = ll_i2info(inode)->lli_clob;
+ struct lu_env *env;
+ struct cl_layout cl = {
+ .cl_buf.lb_buf = buf,
+ .cl_buf.lb_len = buf_size,
+ };
+ __u16 refcheck;
+
+ if (obj == NULL)
+ 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 == 0)
+ GOTO(out_env, rc = -ENODATA);
+
+ rc = cl.cl_size;
+
+ if (buf_size == 0)
+ GOTO(out_env, rc);
+
+ LASSERT(buf != NULL && 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 == LOV_MAGIC_COMP_V1)
+ goto out_env;
+
+ ((struct lov_mds_md *)buf)->lmm_layout_gen = 0;
+out_env:
+ cl_env_put(env, &refcheck);
+
+ RETURN(rc);
+ } else if (S_ISDIR(inode->i_mode)) {
+ struct lov_mds_md *lmm = NULL;
+ int lmm_size = 0;
+ struct ptlrpc_request *req = NULL;
+
+ rc = ll_dir_getstripe(inode, (void **)&lmm, &lmm_size,
+ &req, 0);
+ if (rc < 0)
+ GOTO(out_req, rc);
+
+ if (buf_size == 0)
+ 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 != NULL)
+ ptlrpc_req_finished(req);
+
+ return rc;
+ } else {
+ RETURN(-ENODATA);
+ }
+}
+
+ssize_t ll_getxattr(struct dentry *dentry, const char *name, void *buf,
+ size_t buf_size)
+{
+ struct inode *inode = dentry->d_inode;
+
+ LASSERT(inode);
+ LASSERT(name);
+
+ CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p), xattr %s\n",
+ PFID(ll_inode2fid(inode)), inode, name);
+
+ ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR, 1);
+
+ if (strcmp(name, XATTR_LUSTRE_LOV) == 0 ||
+ strcmp(name, XATTR_NAME_LOV) == 0)
+ return ll_getxattr_lov(inode, buf, buf_size);
+ else
+ return ll_getxattr_common(inode, name, buf, buf_size,
+ OBD_MD_FLXATTR);
+}
+
+ssize_t ll_listxattr(struct dentry *dentry, char *buf, size_t buf_size)
+{
+ struct inode *inode = dentry->d_inode;
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ char *xattr_name;
+ ssize_t rc, rc2;
+ size_t len, rem;
+
+ CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
+ PFID(ll_inode2fid(inode)), inode);
+
+ ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LISTXATTR, 1);
+
+ rc = ll_getxattr_common(inode, NULL, buf, buf_size, OBD_MD_FLXATTRLS);
+ if (rc < 0)
+ RETURN(rc);
+
+ /* If we're being called to get the size of the xattr list
+ * (buf_size == 0) then just assume that a lustre.lov xattr
+ * exists. */
+ if (buf_size == 0)
+ RETURN(rc + sizeof(XATTR_LUSTRE_LOV));
+
+ xattr_name = buf;
+ rem = rc;
+
+ while (rem > 0) {
+ len = strnlen(xattr_name, rem - 1) + 1;
+ rem -= len;
+ if (xattr_type_filter(sbi, get_xattr26_type(xattr_name)) == 0) {
+ /* 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 (buf_size < rc + sizeof(XATTR_LUSTRE_LOV))
+ RETURN(-ERANGE);
+
+ memcpy(buf + rc, XATTR_LUSTRE_LOV, sizeof(XATTR_LUSTRE_LOV));
+
+ RETURN(rc + sizeof(XATTR_LUSTRE_LOV));
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff