+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * linux/mds/mds_xattr.c
- * Lustre Metadata Server (mds) extended attributes handling
- *
- * Copyright (C) 2004-2005 Cluster File Systems, Inc.
- *
- * This file is part of the Lustre file system, http://www.lustre.org
- * Lustre is a trademark of Cluster File Systems, Inc.
- *
- * You may have signed or agreed to another license before downloading
- * this software. If so, you are bound by the terms and conditions
- * of that agreement, and the following does not apply to you. See the
- * LICENSE file included with this distribution for more information.
- *
- * If you did not agree to a different license, then this copy of Lustre
- * is open source software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * In either case, Lustre 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
- * license text for more details.
- */
-
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-#define DEBUG_SUBSYSTEM S_MDS
-
-#include <linux/fs.h>
-#include <obd_support.h>
-#include <obd_class.h>
-#include <obd.h>
-#include <lustre_lib.h>
-#include <lustre/lustre_idl.h>
-#include <lustre_mds.h>
-#include <lustre_dlm.h>
-#include <lustre_fsfilt.h>
-#include <lustre_ucache.h>
-
-#include "mds_internal.h"
-
-#ifndef XATTR_NAME_ACL_ACCESS
-#define XATTR_NAME_ACL_ACCESS "system.posix_acl_access"
-#endif
-
-static int mds_getxattr_pack_msg(struct ptlrpc_request *req,
- struct dentry *de,
- struct mds_body *body)
-{
- struct inode *inode = de->d_inode;
- char *xattr_name;
- int size[3] = { sizeof(struct ptlrpc_body), sizeof(*body) };
- int bufcnt = 2, rc = -EOPNOTSUPP, rc2;
-
- if (inode == NULL)
- return -ENOENT;
-
- if (body->valid & OBD_MD_FLXATTR) {
- xattr_name = lustre_msg_string(req->rq_reqmsg, REQ_REC_OFF+1,0);
- if (!xattr_name) {
- CERROR("can't extract xattr name\n");
- return -EFAULT;
- }
-
- if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_XATTR) &&
- (strncmp(xattr_name, "user.", 5) == 0))
- return -EOPNOTSUPP;
-
- if (inode->i_op && inode->i_op->getxattr)
- rc = inode->i_op->getxattr(de, xattr_name, NULL, 0);
- } else if (body->valid & OBD_MD_FLXATTRLS) {
- if (inode->i_op && inode->i_op->listxattr)
- rc = inode->i_op->listxattr(de, NULL, 0);
- } else {
- CERROR("valid bits: "LPX64"\n", body->valid);
- return -EINVAL;
- }
-
- if (rc < 0) {
- if (rc != -ENODATA && rc != -EOPNOTSUPP)
- CWARN("get inode %lu EA size error: %d\n",
- inode->i_ino, rc);
- bufcnt = 1;
- } else {
- size[bufcnt++] = min_t(int, body->eadatasize, rc);
- }
-
- if (OBD_FAIL_CHECK(OBD_FAIL_MDS_GETXATTR_PACK)) {
- CERROR("failed MDS_GETXATTR_PACK test\n");
- req->rq_status = -ENOMEM;
- return -ENOMEM;
- }
-
- rc2 = lustre_pack_reply(req, bufcnt, size, NULL);
- if (rc2)
- return rc2;
-
- if (rc < 0)
- req->rq_status = rc;
- return 0;
-}
-
-static int mds_getxattr_internal(struct obd_device *obd,
- struct dentry *dentry,
- struct ptlrpc_request *req,
- struct mds_body *reqbody)
-{
- struct mds_body *repbody;
- struct inode *inode = dentry->d_inode;
- char *xattr_name;
- void *buf = NULL;
- int buflen, rc = -EOPNOTSUPP;
- ENTRY;
-
- if (inode == NULL)
- GOTO(out, rc = -ENOENT);
-
- repbody = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
- sizeof(*repbody));
- LASSERT(repbody != NULL);
-
- buflen = lustre_msg_buflen(req->rq_repmsg, REPLY_REC_OFF + 1);
- if (buflen)
- buf = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF + 1, buflen);
-
- if (reqbody->valid & OBD_MD_FLXATTR) {
- xattr_name = lustre_msg_string(req->rq_reqmsg, REQ_REC_OFF+1,0);
- DEBUG_REQ(D_INODE, req, "getxattr %s", xattr_name);
-
- if (inode->i_op && inode->i_op->getxattr) {
- rc = inode->i_op->getxattr(dentry, xattr_name,
- buf, buflen);
- }
-
- if (rc < 0 && rc != -ENODATA && rc != -EOPNOTSUPP &&
- rc != -ERANGE)
- CDEBUG(D_OTHER, "getxattr failed: %d\n", rc);
- } else if (reqbody->valid & OBD_MD_FLXATTRLS) {
- DEBUG_REQ(D_INODE, req, "listxattr");
-
- if (inode->i_op && inode->i_op->listxattr) {
- rc = inode->i_op->listxattr(dentry, buf, buflen);
- }
- if (rc < 0)
- CDEBUG(D_OTHER, "listxattr failed: %d\n", rc);
- } else
- LBUG();
-
- if (rc >= 0) {
- repbody->eadatasize = rc;
- rc = 0;
- }
-out:
- req->rq_status = rc;
- RETURN(0);
-}
-
-int mds_getxattr(struct ptlrpc_request *req)
-{
- struct mds_obd *mds = mds_req2mds(req);
- struct obd_device *obd = req->rq_export->exp_obd;
- struct lvfs_run_ctxt saved;
- struct dentry *de;
- struct mds_body *body;
- struct lvfs_ucred uc = {0,};
- int rc = 0;
- ENTRY;
-
- mds_counter_incr(req->rq_export, LPROC_MDS_GETXATTR);
-
- body = lustre_swab_reqbuf(req, REQ_REC_OFF, sizeof(*body),
- lustre_swab_mds_body);
- if (body == NULL)
- RETURN(-EFAULT);
-
- rc = mds_init_ucred(&uc, req, REQ_REC_OFF);
- if (rc)
- GOTO(out_ucred, rc);
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
- de = mds_fid2dentry(mds, &body->fid1, NULL);
- if (IS_ERR(de)) {
- rc = req->rq_status = PTR_ERR(de);
- GOTO(out_pop, rc);
- }
-
- rc = mds_getxattr_pack_msg(req, de, body);
- if (rc != 0 || req->rq_status)
- GOTO(out_dput, rc);
-
- rc = mds_getxattr_internal(obd, de, req, body);
-
-out_dput:
- l_dput(de);
-out_pop:
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
-out_ucred:
- mds_exit_ucred(&uc, mds);
- return rc;
-}
-
-/*
- * alwasy return 0, and set req->rq_status as error number in case
- * of failures.
- */
-static
-int mds_setxattr_internal(struct ptlrpc_request *req, struct mds_body *body)
-{
- struct mds_obd *mds = mds_req2mds(req);
- struct obd_device *obd = req->rq_export->exp_obd;
- struct dentry *de;
- struct inode *inode = NULL;
- struct lustre_handle lockh;
- void *handle = NULL;
- char *xattr_name;
- char *xattr = NULL;
- int xattrlen;
- int rc = -EOPNOTSUPP, err = 0;
- __u64 lockpart;
- ENTRY;
-
- LASSERT(body);
-
- DEBUG_REQ(D_INODE, req, "setxattr "LPU64"/%u",
- body->fid1.id, body->fid1.generation);
-
- MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
-
- lockpart = MDS_INODELOCK_UPDATE;
-
- /* various sanity check for xattr name */
- xattr_name = lustre_msg_string(req->rq_reqmsg, REQ_REC_OFF + 1, 0);
- if (!xattr_name) {
- CERROR("can't extract xattr name\n");
- GOTO(out, rc = -EPROTO);
- }
-
- DEBUG_REQ(D_INODE, req, "%sxattr %s",
- body->valid & OBD_MD_FLXATTR ? "set" : "remove",
- xattr_name);
-
- if (strncmp(xattr_name, "trusted.", 8) == 0) {
- if (strcmp(xattr_name + 8, XATTR_LUSTRE_MDS_LOV_EA) == 0)
- GOTO(out, rc = -EACCES);
- }
-
- if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_XATTR) &&
- (strncmp(xattr_name, "user.", 5) == 0)) {
- GOTO(out, rc = -EOPNOTSUPP);
- }
-
- if (!strcmp(xattr_name, XATTR_NAME_ACL_ACCESS))
- lockpart |= MDS_INODELOCK_LOOKUP;
-
- de = mds_fid2locked_dentry(obd, &body->fid1, NULL, LCK_EX,
- &lockh, lockpart);
- if (IS_ERR(de))
- GOTO(out, rc = PTR_ERR(de));
-
- inode = de->d_inode;
- LASSERT(inode);
-
- OBD_FAIL_WRITE(OBD_FAIL_MDS_SETXATTR_WRITE, inode->i_sb);
-
- /* filter_op simply use setattr one */
- handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
- if (IS_ERR(handle))
- GOTO(out_dput, rc = PTR_ERR(handle));
-
- if (body->valid & OBD_MD_FLXATTR) {
- if (inode->i_op && inode->i_op->setxattr) {
- if (lustre_msg_bufcount(req->rq_reqmsg) < 4) {
- CERROR("no xattr data supplied\n");
- GOTO(out_trans, rc = -EFAULT);
- }
-
- xattrlen = lustre_msg_buflen(req->rq_reqmsg,
- REQ_REC_OFF + 2);
- if (xattrlen)
- xattr = lustre_msg_buf(req->rq_reqmsg,
- REQ_REC_OFF+2, xattrlen);
-
- LOCK_INODE_MUTEX(inode);
- rc = inode->i_op->setxattr(de, xattr_name, xattr,
- xattrlen, body->flags);
- UNLOCK_INODE_MUTEX(inode);
- }
- } else if (body->valid & OBD_MD_FLXATTRRM) {
- if (inode->i_op && inode->i_op->removexattr) {
- LOCK_INODE_MUTEX(inode);
- rc = inode->i_op->removexattr(de, xattr_name);
- UNLOCK_INODE_MUTEX(inode);
- }
- } else {
- CERROR("valid bits: "LPX64"\n", body->valid);
- rc = -EINVAL;
- }
-
- LASSERT(rc <= 0);
-out_trans:
- err = mds_finish_transno(mds, inode, handle, req, rc, 0, 0);
-
-out_dput:
- l_dput(de);
- if (rc)
- ldlm_lock_decref(&lockh, LCK_EX);
- else
- ptlrpc_save_lock (req, &lockh, LCK_EX);
-
- if (err && !rc)
- rc = err;
-out:
- req->rq_status = rc;
- return 0;
-}
-
-int mds_setxattr(struct ptlrpc_request *req)
-{
- struct mds_obd *mds = mds_req2mds(req);
- struct obd_device *obd = req->rq_export->exp_obd;
- struct lvfs_run_ctxt saved;
- struct mds_body *body;
- struct lvfs_ucred uc = {0,};
- int rc;
- ENTRY;
-
- mds_counter_incr(req->rq_export, LPROC_MDS_SETXATTR);
-
- body = lustre_swab_reqbuf(req, REQ_REC_OFF, sizeof(*body),
- lustre_swab_mds_body);
- if (body == NULL)
- RETURN(-EFAULT);
-
- if (lustre_msg_bufcount(req->rq_reqmsg) < 3)
- RETURN(-EFAULT);
-
- rc = mds_init_ucred(&uc, req, REQ_REC_OFF);
- if (rc)
- GOTO(out_ucred, rc);
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
-
- rc = lustre_pack_reply(req, 1, NULL, NULL);
- if (rc)
- GOTO(out_pop, rc);
-
- rc = mds_setxattr_internal(req, body);
-
-out_pop:
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &uc);
-out_ucred:
- mds_exit_ucred(&uc, mds);
- return rc;
-}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff