+++ /dev/null
-/* -*- MODE: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * mdd/mdd_handler.c
- * Lustre Metadata Server (mdd) routines
- *
- * Copyright (C) 2006 Cluster File Systems, Inc.
- * Author: Wang Di <wangdi@clusterfs.com>
- *
- * 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/module.h>
-#include <linux/jbd.h>
-#include <obd.h>
-#include <obd_class.h>
-#include <lustre_ver.h>
-#include <obd_support.h>
-#include <lprocfs_status.h>
-
-#include <linux/ldiskfs_fs.h>
-#include <lustre_mds.h>
-#include <lustre/lustre_idl.h>
-
-#include "mdd_internal.h"
-
-static inline void mdd_set_dead_obj(struct mdd_object *obj)
-{
- if (obj)
- obj->mod_flags |= DEAD_OBJ;
-}
-
-int mdd_la_get(const struct lu_env *env, struct mdd_object *obj,
- struct lu_attr *la, struct lustre_capa *capa)
-{
- struct dt_object *next = mdd_object_child(obj);
- LASSERT(lu_object_exists(mdd2lu_obj(obj)));
- return next->do_ops->do_attr_get(env, next, la, capa);
-}
-
-static void mdd_flags_xlate(struct mdd_object *obj, __u32 flags)
-{
- obj->mod_flags &= ~(APPEND_OBJ|IMMUTE_OBJ);
-
- if (flags & LUSTRE_APPEND_FL)
- obj->mod_flags |= APPEND_OBJ;
-
- if (flags & LUSTRE_IMMUTABLE_FL)
- obj->mod_flags |= IMMUTE_OBJ;
-}
-
-int mdd_get_flags(const struct lu_env *env, struct mdd_object *obj)
-{
- struct lu_attr *la = &mdd_env_info(env)->mti_la;
- int rc;
-
- ENTRY;
- mdd_read_lock(env, obj);
- rc = mdd_la_get(env, obj, la, BYPASS_CAPA);
- mdd_read_unlock(env, obj);
- if (rc == 0)
- mdd_flags_xlate(obj, la->la_flags);
- RETURN(rc);
-}
-
-void mdd_ref_add_internal(const struct lu_env *env, struct mdd_object *obj,
- struct thandle *handle)
-{
- struct dt_object *next;
-
- LASSERT(lu_object_exists(mdd2lu_obj(obj)));
- next = mdd_object_child(obj);
- next->do_ops->do_ref_add(env, next, handle);
-}
-
-void mdd_ref_del_internal(const struct lu_env *env, struct mdd_object *obj,
- struct thandle *handle)
-{
- struct dt_object *next = mdd_object_child(obj);
- ENTRY;
-
- LASSERT(lu_object_exists(mdd2lu_obj(obj)));
-
- next->do_ops->do_ref_del(env, next, handle);
- EXIT;
-}
-
-/* get only inode attributes */
-int mdd_iattr_get(const struct lu_env *env, struct mdd_object *mdd_obj,
- struct md_attr *ma)
-{
- int rc = 0;
- ENTRY;
-
- if (ma->ma_valid & MA_INODE)
- RETURN(0);
-
- rc = mdd_la_get(env, mdd_obj, &ma->ma_attr,
- mdd_object_capa(env, mdd_obj));
- if (rc == 0)
- ma->ma_valid |= MA_INODE;
- RETURN(rc);
-}
-
-/* get lov EA only */
-static int __mdd_lmm_get(const struct lu_env *env,
- struct mdd_object *mdd_obj, struct md_attr *ma)
-{
- int rc;
- ENTRY;
-
- if (ma->ma_valid & MA_LOV)
- RETURN(0);
-
- LASSERT(ma->ma_lmm != NULL && ma->ma_lmm_size > 0);
- rc = mdd_get_md(env, mdd_obj, ma->ma_lmm, &ma->ma_lmm_size,
- MDS_LOV_MD_NAME);
- if (rc > 0) {
- ma->ma_valid |= MA_LOV;
- rc = 0;
- }
- RETURN(rc);
-}
-
-int mdd_lmm_get_locked(const struct lu_env *env, struct mdd_object *mdd_obj,
- struct md_attr *ma)
-{
- int rc;
- ENTRY;
-
- mdd_read_lock(env, mdd_obj);
- rc = __mdd_lmm_get(env, mdd_obj, ma);
- mdd_read_unlock(env, mdd_obj);
- RETURN(rc);
-}
-
-/* get lmv EA only*/
-static int __mdd_lmv_get(const struct lu_env *env,
- struct mdd_object *mdd_obj, struct md_attr *ma)
-{
- int rc;
-
- if (ma->ma_valid & MA_LMV)
- RETURN(0);
- rc = mdd_get_md(env, mdd_obj, ma->ma_lmv, &ma->ma_lmv_size,
- MDS_LMV_MD_NAME);
- if (rc > 0) {
- ma->ma_valid |= MA_LMV;
- rc = 0;
- }
- RETURN(rc);
-}
-
-static int mdd_attr_get_internal(const struct lu_env *env,
- struct mdd_object *mdd_obj,
- struct md_attr *ma)
-{
- int rc = 0;
- ENTRY;
-
- if (ma->ma_need & MA_INODE)
- rc = mdd_iattr_get(env, mdd_obj, ma);
-
- if (rc == 0 && ma->ma_need & MA_LOV) {
- if (S_ISREG(mdd_object_type(mdd_obj)) ||
- S_ISDIR(mdd_object_type(mdd_obj)))
- rc = __mdd_lmm_get(env, mdd_obj, ma);
- }
- if (rc == 0 && ma->ma_need & MA_LMV) {
- if (S_ISDIR(mdd_object_type(mdd_obj)))
- rc = __mdd_lmv_get(env, mdd_obj, ma);
- }
-#ifdef CONFIG_FS_POSIX_ACL
- if (rc == 0 && ma->ma_need & MA_ACL_DEF) {
- if (S_ISDIR(mdd_object_type(mdd_obj)))
- rc = mdd_acl_def_get(env, mdd_obj, ma);
- }
-#endif
- CDEBUG(D_INODE, "after getattr rc = %d, ma_valid = "LPX64"\n",
- rc, ma->ma_valid);
- RETURN(rc);
-}
-
-int mdd_attr_get_internal_locked(const struct lu_env *env,
- struct mdd_object *mdd_obj, struct md_attr *ma)
-{
- int rc;
- mdd_read_lock(env, mdd_obj);
- rc = mdd_attr_get_internal(env, mdd_obj, ma);
- mdd_read_unlock(env, mdd_obj);
- return rc;
-}
-
-/*
- * No permission check is needed.
- */
-static int mdd_attr_get(const struct lu_env *env, struct md_object *obj,
- struct md_attr *ma)
-{
- struct mdd_object *mdd_obj = md2mdd_obj(obj);
- int rc;
-
- ENTRY;
- rc = mdd_attr_get_internal_locked(env, mdd_obj, ma);
- RETURN(rc);
-}
-
-/*
- * No permission check is needed.
- */
-static int mdd_xattr_get(const struct lu_env *env,
- struct md_object *obj, struct lu_buf *buf,
- const char *name)
-{
- struct mdd_object *mdd_obj = md2mdd_obj(obj);
- struct dt_object *next;
- int rc;
-
- ENTRY;
-
- LASSERT(lu_object_exists(&obj->mo_lu));
-
- next = mdd_object_child(mdd_obj);
- mdd_read_lock(env, mdd_obj);
- rc = next->do_ops->do_xattr_get(env, next, buf, name,
- mdd_object_capa(env, mdd_obj));
- mdd_read_unlock(env, mdd_obj);
-
- RETURN(rc);
-}
-
-/*
- * Permission check is done when open,
- * no need check again.
- */
-static int mdd_readlink(const struct lu_env *env, struct md_object *obj,
- struct lu_buf *buf)
-{
- struct mdd_object *mdd_obj = md2mdd_obj(obj);
- struct dt_object *next;
- loff_t pos = 0;
- int rc;
- ENTRY;
-
- LASSERT(lu_object_exists(&obj->mo_lu));
-
- next = mdd_object_child(mdd_obj);
- mdd_read_lock(env, mdd_obj);
- rc = next->do_body_ops->dbo_read(env, next, buf, &pos,
- mdd_object_capa(env, mdd_obj));
- mdd_read_unlock(env, mdd_obj);
- RETURN(rc);
-}
-
-static int mdd_xattr_list(const struct lu_env *env, struct md_object *obj,
- struct lu_buf *buf)
-{
- struct mdd_object *mdd_obj = md2mdd_obj(obj);
- struct dt_object *next;
- int rc;
-
- ENTRY;
-
- LASSERT(lu_object_exists(&obj->mo_lu));
-
- next = mdd_object_child(mdd_obj);
- mdd_read_lock(env, mdd_obj);
- rc = next->do_ops->do_xattr_list(env, next, buf,
- mdd_object_capa(env, mdd_obj));
- mdd_read_unlock(env, mdd_obj);
-
- RETURN(rc);
-}
-
-void mdd_write_lock(const struct lu_env *env, struct mdd_object *obj)
-{
- struct dt_object *next = mdd_object_child(obj);
-
- next->do_ops->do_write_lock(env, next);
-}
-
-void mdd_read_lock(const struct lu_env *env, struct mdd_object *obj)
-{
- struct dt_object *next = mdd_object_child(obj);
-
- next->do_ops->do_read_lock(env, next);
-}
-
-void mdd_write_unlock(const struct lu_env *env, struct mdd_object *obj)
-{
- struct dt_object *next = mdd_object_child(obj);
-
- next->do_ops->do_write_unlock(env, next);
-}
-
-void mdd_read_unlock(const struct lu_env *env, struct mdd_object *obj)
-{
- struct dt_object *next = mdd_object_child(obj);
-
- next->do_ops->do_read_unlock(env, next);
-}
-
-
-int mdd_object_create_internal(const struct lu_env *env,
- struct mdd_object *obj, struct md_attr *ma,
- struct thandle *handle)
-{
- struct dt_object *next;
- struct lu_attr *attr = &ma->ma_attr;
- int rc;
- ENTRY;
-
- if (!lu_object_exists(mdd2lu_obj(obj))) {
- next = mdd_object_child(obj);
- rc = next->do_ops->do_create(env, next, attr, handle);
- } else
- rc = -EEXIST;
-
- LASSERT(ergo(rc == 0, lu_object_exists(mdd2lu_obj(obj))));
-
- RETURN(rc);
-}
-
-
-int mdd_attr_set_internal(const struct lu_env *env, struct mdd_object *o,
- const struct lu_attr *attr, struct thandle *handle,
- const int needacl)
-{
- struct dt_object *next;
- int rc;
-
- LASSERT(lu_object_exists(mdd2lu_obj(o)));
- next = mdd_object_child(o);
- rc = next->do_ops->do_attr_set(env, next, attr, handle,
- mdd_object_capa(env, o));
-#ifdef CONFIG_FS_POSIX_ACL
- if (!rc && (attr->la_valid & LA_MODE) && needacl)
- rc = mdd_acl_chmod(env, o, attr->la_mode, handle);
-#endif
- return rc;
-}
-
-int mdd_attr_set_internal_locked(const struct lu_env *env,
- struct mdd_object *o,
- const struct lu_attr *attr,
- struct thandle *handle)
-{
- int rc;
- mdd_write_lock(env, o);
- rc = mdd_attr_set_internal(env, o, attr, handle, 1);
- mdd_write_unlock(env, o);
- return rc;
-}
-
-static int __mdd_xattr_set(const struct lu_env *env, struct mdd_object *o,
- const struct lu_buf *buf, const char *name,
- int fl, struct thandle *handle)
-{
- struct dt_object *next;
- struct lustre_capa *capa = mdd_object_capa(env, o);
- int rc = 0;
- ENTRY;
-
- LASSERT(lu_object_exists(mdd2lu_obj(o)));
- next = mdd_object_child(o);
- if (buf->lb_buf && buf->lb_len > 0) {
- rc = next->do_ops->do_xattr_set(env, next, buf, name, 0, handle,
- capa);
- } else if (buf->lb_buf == NULL && buf->lb_len == 0) {
- rc = next->do_ops->do_xattr_del(env, next, name, handle, capa);
- }
- RETURN(rc);
-}
-
-/* this gives the same functionality as the code between
- * sys_chmod and inode_setattr
- * chown_common and inode_setattr
- * utimes and inode_setattr
- * This API is ported from mds_fix_attr but remove some unnecesssary stuff.
- * and port to
- */
-int mdd_fix_attr(const struct lu_env *env, struct mdd_object *obj,
- struct lu_attr *la)
-{
- struct lu_attr *tmp_la = &mdd_env_info(env)->mti_la;
- struct md_ucred *uc = md_ucred(env);
- time_t now = CURRENT_SECONDS;
- int rc;
- ENTRY;
-
- if (!la->la_valid)
- RETURN(0);
-
- /* Do not permit change file type */
- if (la->la_valid & LA_TYPE)
- RETURN(-EPERM);
-
- /* They should not be processed by setattr */
- if (la->la_valid & (LA_NLINK | LA_RDEV | LA_BLKSIZE))
- RETURN(-EPERM);
-
- rc = mdd_la_get(env, obj, tmp_la, BYPASS_CAPA);
- if (rc)
- RETURN(rc);
-
- if (mdd_is_immutable(obj) || mdd_is_append(obj)) {
-
- /*
- * If only change flags of the object, we should
- * let it pass, but also need capability check
- * here if (!capable(CAP_LINUX_IMMUTABLE)),
- * fix it, when implement capable in mds
- */
- if (la->la_valid & ~LA_FLAGS)
- RETURN(-EPERM);
-
- if (!mdd_capable(uc, CAP_LINUX_IMMUTABLE))
- RETURN(-EPERM);
-
- if ((uc->mu_fsuid != tmp_la->la_uid) &&
- !mdd_capable(uc, CAP_FOWNER))
- RETURN(-EPERM);
-
- /*
- * According to Ext3 implementation on this, the
- * Ctime will be changed, but not clear why?
- */
- la->la_ctime = now;
- la->la_valid |= LA_CTIME;
- RETURN(0);
- }
-
- /* Check for setting the obj time. */
- if ((la->la_valid & (LA_MTIME | LA_ATIME | LA_CTIME)) &&
- !(la->la_valid & ~(LA_MTIME | LA_ATIME | LA_CTIME))) {
- rc = __mdd_permission_internal(env, obj, MAY_WRITE, 0);
- if (rc)
- RETURN(rc);
- }
-
- /* Make sure a caller can chmod. */
- if (la->la_valid & LA_MODE) {
- /*
- * Bypass la_vaild == LA_MODE,
- * this is for changing file with SUID or SGID.
- */
- if ((la->la_valid & ~LA_MODE) &&
- (uc->mu_fsuid != tmp_la->la_uid) &&
- !mdd_capable(uc, CAP_FOWNER))
- RETURN(-EPERM);
-
- if (la->la_mode == (umode_t) -1)
- la->la_mode = tmp_la->la_mode;
- else
- la->la_mode = (la->la_mode & S_IALLUGO) |
- (tmp_la->la_mode & ~S_IALLUGO);
-
- /* Also check the setgid bit! */
- if (!mdd_in_group_p(uc, (la->la_valid & LA_GID) ? la->la_gid :
- tmp_la->la_gid) && !mdd_capable(uc, CAP_FSETID))
- la->la_mode &= ~S_ISGID;
- } else {
- la->la_mode = tmp_la->la_mode;
- }
-
- /* Make sure a caller can chown. */
- if (la->la_valid & LA_UID) {
- if (la->la_uid == (uid_t) -1)
- la->la_uid = tmp_la->la_uid;
- if (((uc->mu_fsuid != tmp_la->la_uid) ||
- (la->la_uid != tmp_la->la_uid)) &&
- !mdd_capable(uc, CAP_CHOWN))
- RETURN(-EPERM);
-
- /*
- * If the user or group of a non-directory has been
- * changed by a non-root user, remove the setuid bit.
- * 19981026 David C Niemi <niemi@tux.org>
- *
- * Changed this to apply to all users, including root,
- * to avoid some races. This is the behavior we had in
- * 2.0. The check for non-root was definitely wrong
- * for 2.2 anyway, as it should have been using
- * CAP_FSETID rather than fsuid -- 19990830 SD.
- */
- if (((tmp_la->la_mode & S_ISUID) == S_ISUID) &&
- !S_ISDIR(tmp_la->la_mode)) {
- la->la_mode &= ~S_ISUID;
- la->la_valid |= LA_MODE;
- }
- }
-
- /* Make sure caller can chgrp. */
- if (la->la_valid & LA_GID) {
- if (la->la_gid == (gid_t) -1)
- la->la_gid = tmp_la->la_gid;
- if (((uc->mu_fsuid != tmp_la->la_uid) ||
- ((la->la_gid != tmp_la->la_gid) &&
- !mdd_in_group_p(uc, la->la_gid))) &&
- !mdd_capable(uc, CAP_CHOWN))
- RETURN(-EPERM);
-
- /*
- * Likewise, if the user or group of a non-directory
- * has been changed by a non-root user, remove the
- * setgid bit UNLESS there is no group execute bit
- * (this would be a file marked for mandatory
- * locking). 19981026 David C Niemi <niemi@tux.org>
- *
- * Removed the fsuid check (see the comment above) --
- * 19990830 SD.
- */
- if (((tmp_la->la_mode & (S_ISGID | S_IXGRP)) ==
- (S_ISGID | S_IXGRP)) && !S_ISDIR(tmp_la->la_mode)) {
- la->la_mode &= ~S_ISGID;
- la->la_valid |= LA_MODE;
- }
- }
-
- /* For tuncate (or setsize), we should have MAY_WRITE perm */
- if (la->la_valid & (LA_SIZE | LA_BLOCKS)) {
- rc = mdd_permission_internal(env, obj, MAY_WRITE);
- if (rc)
- RETURN(rc);
-
- /*
- * For the "Size-on-MDS" setattr update, merge coming
- * attributes with the set in the inode. BUG 10641
- */
- if ((la->la_valid & LA_ATIME) &&
- (la->la_atime < tmp_la->la_atime))
- la->la_valid &= ~LA_ATIME;
-
- if ((la->la_valid & LA_CTIME) &&
- (la->la_ctime < tmp_la->la_ctime))
- la->la_valid &= ~(LA_MTIME | LA_CTIME);
-
- if (!(la->la_valid & LA_MTIME) && (now > tmp_la->la_mtime)) {
- la->la_mtime = now;
- la->la_valid |= LA_MTIME;
- }
- }
-
- /* For last, ctime must be fixed */
- if (!(la->la_valid & LA_CTIME) && (now > tmp_la->la_ctime)) {
- la->la_ctime = now;
- la->la_valid |= LA_CTIME;
- }
-
- RETURN(0);
-}
-
-/* set attr and LOV EA at once, return updated attr */
-static int mdd_attr_set(const struct lu_env *env, struct md_object *obj,
- const struct md_attr *ma)
-{
- struct mdd_object *mdd_obj = md2mdd_obj(obj);
- struct mdd_device *mdd = mdo2mdd(obj);
- struct thandle *handle;
- struct lov_mds_md *lmm = NULL;
- int rc = 0, lmm_size = 0, max_size = 0;
- struct lu_attr *la_copy = &mdd_env_info(env)->mti_la_for_fix;
- ENTRY;
-
- mdd_txn_param_build(env, mdd, MDD_TXN_ATTR_SET_OP);
- handle = mdd_trans_start(env, mdd);
- if (IS_ERR(handle))
- RETURN(PTR_ERR(handle));
- /*TODO: add lock here*/
- /* start a log jounal handle if needed */
- if (S_ISREG(mdd_object_type(mdd_obj)) &&
- ma->ma_attr.la_valid & (LA_UID | LA_GID)) {
- max_size = mdd_lov_mdsize(env, mdd);
- OBD_ALLOC(lmm, max_size);
- if (lmm == NULL)
- GOTO(cleanup, rc = -ENOMEM);
-
- rc = mdd_get_md_locked(env, mdd_obj, lmm, &lmm_size,
- MDS_LOV_MD_NAME);
-
- if (rc < 0)
- GOTO(cleanup, rc);
- }
-
- if (ma->ma_attr.la_valid & (ATTR_MTIME | ATTR_CTIME))
- CDEBUG(D_INODE, "setting mtime "LPU64", ctime "LPU64"\n",
- ma->ma_attr.la_mtime, ma->ma_attr.la_ctime);
-
- *la_copy = ma->ma_attr;
- mdd_write_lock(env, mdd_obj);
- rc = mdd_fix_attr(env, mdd_obj, la_copy);
- mdd_write_unlock(env, mdd_obj);
- if (rc)
- GOTO(cleanup, rc);
-
- if (la_copy->la_valid & LA_FLAGS) {
- rc = mdd_attr_set_internal_locked(env, mdd_obj, la_copy,
- handle);
- if (rc == 0)
- mdd_flags_xlate(mdd_obj, la_copy->la_flags);
- } else if (la_copy->la_valid) { /* setattr */
- rc = mdd_attr_set_internal_locked(env, mdd_obj, la_copy,
- handle);
- /* journal chown/chgrp in llog, just like unlink */
- if (rc == 0 && lmm_size){
- /*TODO set_attr llog */
- }
- }
-
- if (rc == 0 && ma->ma_valid & MA_LOV) {
- umode_t mode;
-
- mode = mdd_object_type(mdd_obj);
- if (S_ISREG(mode) || S_ISDIR(mode)) {
- /*TODO check permission*/
- rc = mdd_lov_set_md(env, NULL, mdd_obj, ma->ma_lmm,
- ma->ma_lmm_size, handle, 1);
- }
-
- }
-cleanup:
- mdd_trans_stop(env, mdd, rc, handle);
- if (rc == 0 && lmm_size) {
- /*set obd attr, if needed*/
- rc = mdd_lov_setattr_async(env, mdd_obj, lmm, lmm_size);
- }
- if (lmm != NULL) {
- OBD_FREE(lmm, max_size);
- }
-
- RETURN(rc);
-}
-
-int mdd_xattr_set_txn(const struct lu_env *env, struct mdd_object *obj,
- const struct lu_buf *buf, const char *name, int fl,
- struct thandle *handle)
-{
- int rc;
- ENTRY;
-
- mdd_write_lock(env, obj);
- rc = __mdd_xattr_set(env, obj, buf, name, fl, handle);
- mdd_write_unlock(env, obj);
-
- RETURN(rc);
-}
-
-static int mdd_xattr_sanity_check(const struct lu_env *env,
- struct mdd_object *obj)
-{
- struct lu_attr *tmp_la = &mdd_env_info(env)->mti_la;
- struct md_ucred *uc = md_ucred(env);
- int rc;
- ENTRY;
-
- if (mdd_is_immutable(obj) || mdd_is_append(obj))
- RETURN(-EPERM);
-
- mdd_read_lock(env, obj);
- rc = mdd_la_get(env, obj, tmp_la, BYPASS_CAPA);
- mdd_read_unlock(env, obj);
- if (rc)
- RETURN(rc);
-
- if ((uc->mu_fsuid != tmp_la->la_uid) && !mdd_capable(uc, CAP_FOWNER))
- RETURN(-EPERM);
-
- RETURN(rc);
-}
-
-static int mdd_xattr_set(const struct lu_env *env, struct md_object *obj,
- const struct lu_buf *buf, const char *name, int fl)
-{
- struct mdd_object *mdd_obj = md2mdd_obj(obj);
- struct mdd_device *mdd = mdo2mdd(obj);
- struct thandle *handle;
- int rc;
- ENTRY;
-
- rc = mdd_xattr_sanity_check(env, mdd_obj);
- if (rc)
- RETURN(rc);
-
- mdd_txn_param_build(env, mdd, MDD_TXN_XATTR_SET_OP);
- handle = mdd_trans_start(env, mdd);
- if (IS_ERR(handle))
- RETURN(PTR_ERR(handle));
-
- rc = mdd_xattr_set_txn(env, md2mdd_obj(obj), buf, name,
- fl, handle);
-#ifdef HAVE_SPLIT_SUPPORT
- if (rc == 0) {
- /*
- * XXX: Very ugly hack, if setting lmv, it means splitting
- * sucess, we should return -ERESTART to notify the client, so
- * transno for this splitting should be zero according to the
- * replay rules. so return -ERESTART here let mdt trans stop
- * callback know this.
- */
- if (strncmp(name, MDS_LMV_MD_NAME, strlen(name)) == 0)
- rc = -ERESTART;
- }
-#endif
- mdd_trans_stop(env, mdd, rc, handle);
-
- RETURN(rc);
-}
-
-static int __mdd_xattr_del(const struct lu_env *env,struct mdd_device *mdd,
- struct mdd_object *obj,
- const char *name, struct thandle *handle)
-{
- struct dt_object *next;
-
- LASSERT(lu_object_exists(mdd2lu_obj(obj)));
- next = mdd_object_child(obj);
- return next->do_ops->do_xattr_del(env, next, name, handle,
- mdd_object_capa(env, obj));
-}
-
-int mdd_xattr_del(const struct lu_env *env, struct md_object *obj,
- const char *name)
-{
- struct mdd_object *mdd_obj = md2mdd_obj(obj);
- struct mdd_device *mdd = mdo2mdd(obj);
- struct thandle *handle;
- int rc;
- ENTRY;
-
- rc = mdd_xattr_sanity_check(env, mdd_obj);
- if (rc)
- RETURN(rc);
-
- mdd_txn_param_build(env, mdd, MDD_TXN_XATTR_SET_OP);
- handle = mdd_trans_start(env, mdd);
- if (IS_ERR(handle))
- RETURN(PTR_ERR(handle));
-
- mdd_write_lock(env, mdd_obj);
- rc = __mdd_xattr_del(env, mdd, md2mdd_obj(obj), name, handle);
- mdd_write_unlock(env, mdd_obj);
-
- mdd_trans_stop(env, mdd, rc, handle);
-
- RETURN(rc);
-}
-
-/* partial unlink */
-static int mdd_ref_del(const struct lu_env *env, struct md_object *obj,
- struct md_attr *ma)
-{
- struct mdd_object *mdd_obj = md2mdd_obj(obj);
- struct mdd_device *mdd = mdo2mdd(obj);
- struct thandle *handle;
- int rc;
- ENTRY;
-
- rc = mdd_log_txn_param_build(env, mdd_obj, ma, MDD_TXN_UNLINK_OP);
- if (rc)
- RETURN(rc);
-
- handle = mdd_trans_start(env, mdd);
- if (IS_ERR(handle))
- RETURN(-ENOMEM);
-
- mdd_write_lock(env, mdd_obj);
-
- rc = mdd_unlink_sanity_check(env, NULL, mdd_obj, ma);
- if (rc)
- GOTO(cleanup, rc);
-
- mdd_ref_del_internal(env, mdd_obj, handle);
-
- if (S_ISDIR(lu_object_attr(&obj->mo_lu))) {
- /* unlink dot */
- mdd_ref_del_internal(env, mdd_obj, handle);
- }
-
- rc = mdd_finish_unlink(env, mdd_obj, ma, handle);
-
- EXIT;
-cleanup:
- mdd_write_unlock(env, mdd_obj);
- mdd_trans_stop(env, mdd, rc, handle);
- return rc;
-}
-
-/* partial operation */
-static int mdd_oc_sanity_check(const struct lu_env *env,
- struct mdd_object *obj,
- struct md_attr *ma)
-{
- int rc;
- ENTRY;
-
- switch (ma->ma_attr.la_mode & S_IFMT) {
- case S_IFREG:
- case S_IFDIR:
- case S_IFLNK:
- case S_IFCHR:
- case S_IFBLK:
- case S_IFIFO:
- case S_IFSOCK:
- rc = 0;
- break;
- default:
- rc = -EINVAL;
- break;
- }
- RETURN(rc);
-}
-
-static int mdd_object_create(const struct lu_env *env,
- struct md_object *obj,
- const struct md_create_spec *spec,
- struct md_attr *ma)
-{
-
- struct mdd_device *mdd = mdo2mdd(obj);
- struct mdd_object *mdd_obj = md2mdd_obj(obj);
- const struct lu_fid *pfid = spec->u.sp_pfid;
- struct thandle *handle;
- int rc;
- ENTRY;
-
- rc = mdd_oc_sanity_check(env, mdd_obj, ma);
- if (rc)
- RETURN(rc);
-
- mdd_txn_param_build(env, mdd, MDD_TXN_OBJECT_CREATE_OP);
- handle = mdd_trans_start(env, mdd);
- if (IS_ERR(handle))
- RETURN(PTR_ERR(handle));
-
- mdd_write_lock(env, mdd_obj);
- rc = mdd_object_create_internal(env, mdd_obj, ma, handle);
- if (rc)
- GOTO(unlock, rc);
-
- if (spec->sp_cr_flags & MDS_CREATE_SLAVE_OBJ) {
- /* If creating the slave object, set slave EA here. */
- int lmv_size = spec->u.sp_ea.eadatalen;
- struct lmv_stripe_md *lmv;
-
- lmv = (struct lmv_stripe_md *)spec->u.sp_ea.eadata;
- LASSERT(lmv != NULL && lmv_size > 0);
-
- rc = __mdd_xattr_set(env, mdd_obj,
- mdd_buf_get_const(env, lmv, lmv_size),
- MDS_LMV_MD_NAME, 0, handle);
- if (rc)
- GOTO(unlock, rc);
- pfid = spec->u.sp_ea.fid;
-
- CDEBUG(D_INFO, "Set slave ea "DFID", eadatalen %d, rc %d\n",
- PFID(mdo2fid(mdd_obj)), spec->u.sp_ea.eadatalen, rc);
- rc = mdd_attr_set_internal(env, mdd_obj, &ma->ma_attr, handle, 0);
- } else {
-#ifdef CONFIG_FS_POSIX_ACL
- if (spec->sp_cr_flags & MDS_CREATE_RMT_ACL) {
- struct lu_buf *buf = &mdd_env_info(env)->mti_buf;
-
- buf->lb_buf = (void *)spec->u.sp_ea.eadata;
- buf->lb_len = spec->u.sp_ea.eadatalen;
- if ((buf->lb_len > 0) && (buf->lb_buf != NULL)) {
- rc = __mdd_acl_init(env, mdd_obj, buf,
- &ma->ma_attr.la_mode,
- handle);
- if (rc)
- GOTO(unlock, rc);
- else
- ma->ma_attr.la_valid |= LA_MODE;
- }
- }
-#endif
- rc = mdd_object_initialize(env, pfid, mdd_obj, ma, handle);
- }
- EXIT;
-unlock:
- mdd_write_unlock(env, mdd_obj);
- if (rc == 0)
- rc = mdd_attr_get_internal_locked(env, mdd_obj, ma);
-
- mdd_trans_stop(env, mdd, rc, handle);
- return rc;
-}
-
-/*
- * XXX: if permission check is needed here?
- */
-static int mdd_ref_add(const struct lu_env *env,
- struct md_object *obj)
-{
- struct mdd_object *mdd_obj = md2mdd_obj(obj);
- struct mdd_device *mdd = mdo2mdd(obj);
- struct thandle *handle;
- int rc;
- ENTRY;
-
- mdd_txn_param_build(env, mdd, MDD_TXN_XATTR_SET_OP);
- handle = mdd_trans_start(env, mdd);
- if (IS_ERR(handle))
- RETURN(-ENOMEM);
-
- mdd_write_lock(env, mdd_obj);
- rc = mdd_link_sanity_check(env, NULL, mdd_obj);
- if (!rc)
- mdd_ref_add_internal(env, mdd_obj, handle);
- mdd_write_unlock(env, mdd_obj);
-
- mdd_trans_stop(env, mdd, 0, handle);
-
- RETURN(0);
-}
-
-/* do NOT or the MAY_*'s, you'll get the weakest */
-static int accmode(struct mdd_object *mdd_obj, int flags)
-{
- int res = 0;
-
-#if 0
- /* Sadly, NFSD reopens a file repeatedly during operation, so the
- * "acc_mode = 0" allowance for newly-created files isn't honoured.
- * NFSD uses the MDS_OPEN_OWNEROVERRIDE flag to say that a file
- * owner can write to a file even if it is marked readonly to hide
- * its brokenness. (bug 5781) */
- if (flags & MDS_OPEN_OWNEROVERRIDE && inode->i_uid == current->fsuid)
- return 0;
-#endif
- if (flags & FMODE_READ)
- res = MAY_READ;
- if (flags & (FMODE_WRITE | MDS_OPEN_TRUNC | MDS_OPEN_APPEND))
- res |= MAY_WRITE;
- if (flags & MDS_FMODE_EXEC)
- res = MAY_EXEC;
- return res;
-}
-
-static int mdd_open_sanity_check(const struct lu_env *env,
- struct mdd_object *obj, int flag)
-{
- struct lu_attr *tmp_la = &mdd_env_info(env)->mti_la;
- int mode = accmode(obj, flag);
- int rc;
- ENTRY;
-
- /* EEXIST check */
- if (mdd_is_dead_obj(obj))
- RETURN(-ENOENT);
-
- rc = mdd_la_get(env, obj, tmp_la, BYPASS_CAPA);
- if (rc)
- RETURN(rc);
-
- if (S_ISLNK(tmp_la->la_mode))
- RETURN(-ELOOP);
-
- if (S_ISDIR(tmp_la->la_mode) && (mode & MAY_WRITE))
- RETURN(-EISDIR);
-
- if (!(flag & MDS_OPEN_CREATED)) {
- rc = __mdd_permission_internal(env, obj, mode, 0);
- if (rc)
- RETURN(rc);
- }
-
- /*
- * FIFO's, sockets and device files are special: they don't
- * actually live on the filesystem itself, and as such you
- * can write to them even if the filesystem is read-only.
- */
- if (S_ISFIFO(tmp_la->la_mode) || S_ISSOCK(tmp_la->la_mode) ||
- S_ISBLK(tmp_la->la_mode) || S_ISCHR(tmp_la->la_mode))
- flag &= ~O_TRUNC;
-
- /*
- * An append-only file must be opened in append mode for writing.
- */
- if (mdd_is_append(obj)) {
- if ((flag & FMODE_WRITE) && !(flag & O_APPEND))
- RETURN(-EPERM);
- if (flag & O_TRUNC)
- RETURN(-EPERM);
- }
-
- /* O_NOATIME can only be set by the owner or superuser */
- if (flag & O_NOATIME) {
- struct md_ucred *uc = md_ucred(env);
-
- if (uc->mu_fsuid != tmp_la->la_uid &&
- !mdd_capable(uc, CAP_FOWNER))
- RETURN(-EPERM);
- }
-
- RETURN(0);
-}
-
-static int mdd_open(const struct lu_env *env, struct md_object *obj,
- int flags)
-{
- struct mdd_object *mdd_obj = md2mdd_obj(obj);
- int rc = 0;
-
- mdd_write_lock(env, mdd_obj);
-
- rc = mdd_open_sanity_check(env, mdd_obj, flags);
- if (rc == 0)
- mdd_obj->mod_count++;
-
- mdd_write_unlock(env, mdd_obj);
- return rc;
-}
-
-/* return md_attr back,
- * if it is last unlink then return lov ea + llog cookie*/
-int mdd_object_kill(const struct lu_env *env, struct mdd_object *obj,
- struct md_attr *ma)
-{
- int rc = 0;
- ENTRY;
-
- mdd_set_dead_obj(obj);
- if (S_ISREG(mdd_object_type(obj))) {
- /* Return LOV & COOKIES unconditionally here. We clean evth up.
- * Caller must be ready for that. */
- rc = __mdd_lmm_get(env, obj, ma);
- if ((ma->ma_valid & MA_LOV))
- rc = mdd_unlink_log(env, mdo2mdd(&obj->mod_obj),
- obj, ma);
- }
- RETURN(rc);
-}
-
-/*
- * No permission check is needed.
- */
-static int mdd_close(const struct lu_env *env, struct md_object *obj,
- struct md_attr *ma)
-{
- int rc;
- struct mdd_object *mdd_obj = md2mdd_obj(obj);
- ENTRY;
-
- mdd_write_lock(env, mdd_obj);
- /* release open count */
- mdd_obj->mod_count --;
-
- rc = mdd_iattr_get(env, mdd_obj, ma);
- if (rc == 0 && mdd_obj->mod_count == 0) {
- if (ma->ma_attr.la_nlink == 0)
- rc = mdd_object_kill(env, mdd_obj, ma);
- }
- mdd_write_unlock(env, mdd_obj);
- RETURN(rc);
-}
-
-/*
- * Permission check is done when open,
- * no need check again.
- */
-static int mdd_readpage_sanity_check(const struct lu_env *env,
- struct mdd_object *obj)
-{
- struct dt_object *next = mdd_object_child(obj);
- int rc;
- ENTRY;
-
- if (S_ISDIR(mdd_object_type(obj)) && dt_try_as_dir(env, next))
-#if 0
- rc = mdd_permission_internal(env, obj, MAY_READ);
-#else
- rc = 0;
-#endif
- else
- rc = -ENOTDIR;
-
- RETURN(rc);
-}
-
-static int mdd_readpage(const struct lu_env *env, struct md_object *obj,
- const struct lu_rdpg *rdpg)
-{
- struct dt_object *next;
- struct mdd_object *mdd_obj = md2mdd_obj(obj);
- int rc;
- ENTRY;
-
- LASSERT(lu_object_exists(mdd2lu_obj(mdd_obj)));
- next = mdd_object_child(mdd_obj);
-
- mdd_read_lock(env, mdd_obj);
- rc = mdd_readpage_sanity_check(env, mdd_obj);
- if (rc)
- GOTO(out_unlock, rc);
-
- rc = next->do_ops->do_readpage(env, next, rdpg,
- mdd_object_capa(env, mdd_obj));
-
-out_unlock:
- mdd_read_unlock(env, mdd_obj);
- RETURN(rc);
-}
-
-struct md_object_operations mdd_obj_ops = {
- .moo_permission = mdd_permission,
- .moo_attr_get = mdd_attr_get,
- .moo_attr_set = mdd_attr_set,
- .moo_xattr_get = mdd_xattr_get,
- .moo_xattr_set = mdd_xattr_set,
- .moo_xattr_list = mdd_xattr_list,
- .moo_xattr_del = mdd_xattr_del,
- .moo_object_create = mdd_object_create,
- .moo_ref_add = mdd_ref_add,
- .moo_ref_del = mdd_ref_del,
- .moo_open = mdd_open,
- .moo_close = mdd_close,
- .moo_readpage = mdd_readpage,
- .moo_readlink = mdd_readlink,
- .moo_capa_get = mdd_capa_get
-};
#include "mdd_internal.h"
static struct lu_object_operations mdd_lu_obj_ops;
+
+static inline void mdd_set_dead_obj(struct mdd_object *obj)
+{
+ if (obj)
+ obj->mod_flags |= DEAD_OBJ;
+}
+
+int mdd_la_get(const struct lu_env *env, struct mdd_object *obj,
+ struct lu_attr *la, struct lustre_capa *capa)
+{
+ struct dt_object *next = mdd_object_child(obj);
+ LASSERT(lu_object_exists(mdd2lu_obj(obj)));
+ return next->do_ops->do_attr_get(env, next, la, capa);
+}
+
+static void mdd_flags_xlate(struct mdd_object *obj, __u32 flags)
+{
+ obj->mod_flags &= ~(APPEND_OBJ|IMMUTE_OBJ);
+
+ if (flags & LUSTRE_APPEND_FL)
+ obj->mod_flags |= APPEND_OBJ;
+
+ if (flags & LUSTRE_IMMUTABLE_FL)
+ obj->mod_flags |= IMMUTE_OBJ;
+}
+
struct lu_buf *mdd_buf_get(const struct lu_env *env, void *area, ssize_t len)
{
struct lu_buf *buf;
RETURN(m);
}
+int mdd_get_flags(const struct lu_env *env, struct mdd_object *obj)
+{
+ struct lu_attr *la = &mdd_env_info(env)->mti_la;
+ int rc;
+
+ ENTRY;
+ mdd_read_lock(env, obj);
+ rc = mdd_la_get(env, obj, la, BYPASS_CAPA);
+ mdd_read_unlock(env, obj);
+ if (rc == 0)
+ mdd_flags_xlate(obj, la->la_flags);
+ RETURN(rc);
+}
+
+void mdd_ref_add_internal(const struct lu_env *env, struct mdd_object *obj,
+ struct thandle *handle)
+{
+ struct dt_object *next;
+
+ LASSERT(lu_object_exists(mdd2lu_obj(obj)));
+ next = mdd_object_child(obj);
+ next->do_ops->do_ref_add(env, next, handle);
+}
+
+void mdd_ref_del_internal(const struct lu_env *env, struct mdd_object *obj,
+ struct thandle *handle)
+{
+ struct dt_object *next = mdd_object_child(obj);
+ ENTRY;
+
+ LASSERT(lu_object_exists(mdd2lu_obj(obj)));
+
+ next->do_ops->do_ref_del(env, next, handle);
+ EXIT;
+}
+
+/* get only inode attributes */
+int mdd_iattr_get(const struct lu_env *env, struct mdd_object *mdd_obj,
+ struct md_attr *ma)
+{
+ int rc = 0;
+ ENTRY;
+
+ if (ma->ma_valid & MA_INODE)
+ RETURN(0);
+
+ rc = mdd_la_get(env, mdd_obj, &ma->ma_attr,
+ mdd_object_capa(env, mdd_obj));
+ if (rc == 0)
+ ma->ma_valid |= MA_INODE;
+ RETURN(rc);
+}
+
+/* get lov EA only */
+static int __mdd_lmm_get(const struct lu_env *env,
+ struct mdd_object *mdd_obj, struct md_attr *ma)
+{
+ int rc;
+ ENTRY;
+
+ if (ma->ma_valid & MA_LOV)
+ RETURN(0);
+
+ LASSERT(ma->ma_lmm != NULL && ma->ma_lmm_size > 0);
+ rc = mdd_get_md(env, mdd_obj, ma->ma_lmm, &ma->ma_lmm_size,
+ MDS_LOV_MD_NAME);
+ if (rc > 0) {
+ ma->ma_valid |= MA_LOV;
+ rc = 0;
+ }
+ RETURN(rc);
+}
+
+int mdd_lmm_get_locked(const struct lu_env *env, struct mdd_object *mdd_obj,
+ struct md_attr *ma)
+{
+ int rc;
+ ENTRY;
+
+ mdd_read_lock(env, mdd_obj);
+ rc = __mdd_lmm_get(env, mdd_obj, ma);
+ mdd_read_unlock(env, mdd_obj);
+ RETURN(rc);
+}
+
+/* get lmv EA only*/
+static int __mdd_lmv_get(const struct lu_env *env,
+ struct mdd_object *mdd_obj, struct md_attr *ma)
+{
+ int rc;
+
+ if (ma->ma_valid & MA_LMV)
+ RETURN(0);
+ rc = mdd_get_md(env, mdd_obj, ma->ma_lmv, &ma->ma_lmv_size,
+ MDS_LMV_MD_NAME);
+ if (rc > 0) {
+ ma->ma_valid |= MA_LMV;
+ rc = 0;
+ }
+ RETURN(rc);
+}
+
+static int mdd_attr_get_internal(const struct lu_env *env,
+ struct mdd_object *mdd_obj,
+ struct md_attr *ma)
+{
+ int rc = 0;
+ ENTRY;
+
+ if (ma->ma_need & MA_INODE)
+ rc = mdd_iattr_get(env, mdd_obj, ma);
+
+ if (rc == 0 && ma->ma_need & MA_LOV) {
+ if (S_ISREG(mdd_object_type(mdd_obj)) ||
+ S_ISDIR(mdd_object_type(mdd_obj)))
+ rc = __mdd_lmm_get(env, mdd_obj, ma);
+ }
+ if (rc == 0 && ma->ma_need & MA_LMV) {
+ if (S_ISDIR(mdd_object_type(mdd_obj)))
+ rc = __mdd_lmv_get(env, mdd_obj, ma);
+ }
+#ifdef CONFIG_FS_POSIX_ACL
+ if (rc == 0 && ma->ma_need & MA_ACL_DEF) {
+ if (S_ISDIR(mdd_object_type(mdd_obj)))
+ rc = mdd_acl_def_get(env, mdd_obj, ma);
+ }
+#endif
+ CDEBUG(D_INODE, "after getattr rc = %d, ma_valid = "LPX64"\n",
+ rc, ma->ma_valid);
+ RETURN(rc);
+}
+
+int mdd_attr_get_internal_locked(const struct lu_env *env,
+ struct mdd_object *mdd_obj, struct md_attr *ma)
+{
+ int rc;
+ mdd_read_lock(env, mdd_obj);
+ rc = mdd_attr_get_internal(env, mdd_obj, ma);
+ mdd_read_unlock(env, mdd_obj);
+ return rc;
+}
+
+/*
+ * No permission check is needed.
+ */
+static int mdd_attr_get(const struct lu_env *env, struct md_object *obj,
+ struct md_attr *ma)
+{
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+ int rc;
+
+ ENTRY;
+ rc = mdd_attr_get_internal_locked(env, mdd_obj, ma);
+ RETURN(rc);
+}
+
+/*
+ * No permission check is needed.
+ */
+static int mdd_xattr_get(const struct lu_env *env,
+ struct md_object *obj, struct lu_buf *buf,
+ const char *name)
+{
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+ struct dt_object *next;
+ int rc;
+
+ ENTRY;
+
+ LASSERT(lu_object_exists(&obj->mo_lu));
+
+ next = mdd_object_child(mdd_obj);
+ mdd_read_lock(env, mdd_obj);
+ rc = next->do_ops->do_xattr_get(env, next, buf, name,
+ mdd_object_capa(env, mdd_obj));
+ mdd_read_unlock(env, mdd_obj);
+
+ RETURN(rc);
+}
+
+/*
+ * Permission check is done when open,
+ * no need check again.
+ */
+static int mdd_readlink(const struct lu_env *env, struct md_object *obj,
+ struct lu_buf *buf)
+{
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+ struct dt_object *next;
+ loff_t pos = 0;
+ int rc;
+ ENTRY;
+
+ LASSERT(lu_object_exists(&obj->mo_lu));
+
+ next = mdd_object_child(mdd_obj);
+ mdd_read_lock(env, mdd_obj);
+ rc = next->do_body_ops->dbo_read(env, next, buf, &pos,
+ mdd_object_capa(env, mdd_obj));
+ mdd_read_unlock(env, mdd_obj);
+ RETURN(rc);
+}
+
+static int mdd_xattr_list(const struct lu_env *env, struct md_object *obj,
+ struct lu_buf *buf)
+{
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+ struct dt_object *next;
+ int rc;
+
+ ENTRY;
+
+ LASSERT(lu_object_exists(&obj->mo_lu));
+
+ next = mdd_object_child(mdd_obj);
+ mdd_read_lock(env, mdd_obj);
+ rc = next->do_ops->do_xattr_list(env, next, buf,
+ mdd_object_capa(env, mdd_obj));
+ mdd_read_unlock(env, mdd_obj);
+
+ RETURN(rc);
+}
+
+void mdd_write_lock(const struct lu_env *env, struct mdd_object *obj)
+{
+ struct dt_object *next = mdd_object_child(obj);
+
+ next->do_ops->do_write_lock(env, next);
+}
+
+void mdd_read_lock(const struct lu_env *env, struct mdd_object *obj)
+{
+ struct dt_object *next = mdd_object_child(obj);
+
+ next->do_ops->do_read_lock(env, next);
+}
+
+void mdd_write_unlock(const struct lu_env *env, struct mdd_object *obj)
+{
+ struct dt_object *next = mdd_object_child(obj);
+
+ next->do_ops->do_write_unlock(env, next);
+}
+
+void mdd_read_unlock(const struct lu_env *env, struct mdd_object *obj)
+{
+ struct dt_object *next = mdd_object_child(obj);
+
+ next->do_ops->do_read_unlock(env, next);
+}
+
+
+int mdd_object_create_internal(const struct lu_env *env,
+ struct mdd_object *obj, struct md_attr *ma,
+ struct thandle *handle)
+{
+ struct dt_object *next;
+ struct lu_attr *attr = &ma->ma_attr;
+ int rc;
+ ENTRY;
+
+ if (!lu_object_exists(mdd2lu_obj(obj))) {
+ next = mdd_object_child(obj);
+ rc = next->do_ops->do_create(env, next, attr, handle);
+ } else
+ rc = -EEXIST;
+
+ LASSERT(ergo(rc == 0, lu_object_exists(mdd2lu_obj(obj))));
+
+ RETURN(rc);
+}
+
+
+int mdd_attr_set_internal(const struct lu_env *env, struct mdd_object *o,
+ const struct lu_attr *attr, struct thandle *handle,
+ const int needacl)
+{
+ struct dt_object *next;
+ int rc;
+
+ LASSERT(lu_object_exists(mdd2lu_obj(o)));
+ next = mdd_object_child(o);
+ rc = next->do_ops->do_attr_set(env, next, attr, handle,
+ mdd_object_capa(env, o));
+#ifdef CONFIG_FS_POSIX_ACL
+ if (!rc && (attr->la_valid & LA_MODE) && needacl)
+ rc = mdd_acl_chmod(env, o, attr->la_mode, handle);
+#endif
+ return rc;
+}
+
+int mdd_attr_set_internal_locked(const struct lu_env *env,
+ struct mdd_object *o,
+ const struct lu_attr *attr,
+ struct thandle *handle)
+{
+ int rc;
+ mdd_write_lock(env, o);
+ rc = mdd_attr_set_internal(env, o, attr, handle, 1);
+ mdd_write_unlock(env, o);
+ return rc;
+}
+
+static int __mdd_xattr_set(const struct lu_env *env, struct mdd_object *o,
+ const struct lu_buf *buf, const char *name,
+ int fl, struct thandle *handle)
+{
+ struct dt_object *next;
+ struct lustre_capa *capa = mdd_object_capa(env, o);
+ int rc = 0;
+ ENTRY;
+
+ LASSERT(lu_object_exists(mdd2lu_obj(o)));
+ next = mdd_object_child(o);
+ if (buf->lb_buf && buf->lb_len > 0) {
+ rc = next->do_ops->do_xattr_set(env, next, buf, name, 0, handle,
+ capa);
+ } else if (buf->lb_buf == NULL && buf->lb_len == 0) {
+ rc = next->do_ops->do_xattr_del(env, next, name, handle, capa);
+ }
+ RETURN(rc);
+}
+
+/* this gives the same functionality as the code between
+ * sys_chmod and inode_setattr
+ * chown_common and inode_setattr
+ * utimes and inode_setattr
+ * This API is ported from mds_fix_attr but remove some unnecesssary stuff.
+ * and port to
+ */
+int mdd_fix_attr(const struct lu_env *env, struct mdd_object *obj,
+ struct lu_attr *la)
+{
+ struct lu_attr *tmp_la = &mdd_env_info(env)->mti_la;
+ struct md_ucred *uc = md_ucred(env);
+ time_t now = CURRENT_SECONDS;
+ int rc;
+ ENTRY;
+
+ if (!la->la_valid)
+ RETURN(0);
+
+ /* Do not permit change file type */
+ if (la->la_valid & LA_TYPE)
+ RETURN(-EPERM);
+
+ /* They should not be processed by setattr */
+ if (la->la_valid & (LA_NLINK | LA_RDEV | LA_BLKSIZE))
+ RETURN(-EPERM);
+
+ rc = mdd_la_get(env, obj, tmp_la, BYPASS_CAPA);
+ if (rc)
+ RETURN(rc);
+
+ if (mdd_is_immutable(obj) || mdd_is_append(obj)) {
+
+ /*
+ * If only change flags of the object, we should
+ * let it pass, but also need capability check
+ * here if (!capable(CAP_LINUX_IMMUTABLE)),
+ * fix it, when implement capable in mds
+ */
+ if (la->la_valid & ~LA_FLAGS)
+ RETURN(-EPERM);
+
+ if (!mdd_capable(uc, CAP_LINUX_IMMUTABLE))
+ RETURN(-EPERM);
+
+ if ((uc->mu_fsuid != tmp_la->la_uid) &&
+ !mdd_capable(uc, CAP_FOWNER))
+ RETURN(-EPERM);
+
+ /*
+ * According to Ext3 implementation on this, the
+ * Ctime will be changed, but not clear why?
+ */
+ la->la_ctime = now;
+ la->la_valid |= LA_CTIME;
+ RETURN(0);
+ }
+
+ /* Check for setting the obj time. */
+ if ((la->la_valid & (LA_MTIME | LA_ATIME | LA_CTIME)) &&
+ !(la->la_valid & ~(LA_MTIME | LA_ATIME | LA_CTIME))) {
+ rc = __mdd_permission_internal(env, obj, MAY_WRITE, 0);
+ if (rc)
+ RETURN(rc);
+ }
+
+ /* Make sure a caller can chmod. */
+ if (la->la_valid & LA_MODE) {
+ /*
+ * Bypass la_vaild == LA_MODE,
+ * this is for changing file with SUID or SGID.
+ */
+ if ((la->la_valid & ~LA_MODE) &&
+ (uc->mu_fsuid != tmp_la->la_uid) &&
+ !mdd_capable(uc, CAP_FOWNER))
+ RETURN(-EPERM);
+
+ if (la->la_mode == (umode_t) -1)
+ la->la_mode = tmp_la->la_mode;
+ else
+ la->la_mode = (la->la_mode & S_IALLUGO) |
+ (tmp_la->la_mode & ~S_IALLUGO);
+
+ /* Also check the setgid bit! */
+ if (!mdd_in_group_p(uc, (la->la_valid & LA_GID) ? la->la_gid :
+ tmp_la->la_gid) && !mdd_capable(uc, CAP_FSETID))
+ la->la_mode &= ~S_ISGID;
+ } else {
+ la->la_mode = tmp_la->la_mode;
+ }
+
+ /* Make sure a caller can chown. */
+ if (la->la_valid & LA_UID) {
+ if (la->la_uid == (uid_t) -1)
+ la->la_uid = tmp_la->la_uid;
+ if (((uc->mu_fsuid != tmp_la->la_uid) ||
+ (la->la_uid != tmp_la->la_uid)) &&
+ !mdd_capable(uc, CAP_CHOWN))
+ RETURN(-EPERM);
+
+ /*
+ * If the user or group of a non-directory has been
+ * changed by a non-root user, remove the setuid bit.
+ * 19981026 David C Niemi <niemi@tux.org>
+ *
+ * Changed this to apply to all users, including root,
+ * to avoid some races. This is the behavior we had in
+ * 2.0. The check for non-root was definitely wrong
+ * for 2.2 anyway, as it should have been using
+ * CAP_FSETID rather than fsuid -- 19990830 SD.
+ */
+ if (((tmp_la->la_mode & S_ISUID) == S_ISUID) &&
+ !S_ISDIR(tmp_la->la_mode)) {
+ la->la_mode &= ~S_ISUID;
+ la->la_valid |= LA_MODE;
+ }
+ }
+
+ /* Make sure caller can chgrp. */
+ if (la->la_valid & LA_GID) {
+ if (la->la_gid == (gid_t) -1)
+ la->la_gid = tmp_la->la_gid;
+ if (((uc->mu_fsuid != tmp_la->la_uid) ||
+ ((la->la_gid != tmp_la->la_gid) &&
+ !mdd_in_group_p(uc, la->la_gid))) &&
+ !mdd_capable(uc, CAP_CHOWN))
+ RETURN(-EPERM);
+
+ /*
+ * Likewise, if the user or group of a non-directory
+ * has been changed by a non-root user, remove the
+ * setgid bit UNLESS there is no group execute bit
+ * (this would be a file marked for mandatory
+ * locking). 19981026 David C Niemi <niemi@tux.org>
+ *
+ * Removed the fsuid check (see the comment above) --
+ * 19990830 SD.
+ */
+ if (((tmp_la->la_mode & (S_ISGID | S_IXGRP)) ==
+ (S_ISGID | S_IXGRP)) && !S_ISDIR(tmp_la->la_mode)) {
+ la->la_mode &= ~S_ISGID;
+ la->la_valid |= LA_MODE;
+ }
+ }
+
+ /* For tuncate (or setsize), we should have MAY_WRITE perm */
+ if (la->la_valid & (LA_SIZE | LA_BLOCKS)) {
+ rc = mdd_permission_internal(env, obj, MAY_WRITE);
+ if (rc)
+ RETURN(rc);
+
+ /*
+ * For the "Size-on-MDS" setattr update, merge coming
+ * attributes with the set in the inode. BUG 10641
+ */
+ if ((la->la_valid & LA_ATIME) &&
+ (la->la_atime < tmp_la->la_atime))
+ la->la_valid &= ~LA_ATIME;
+
+ if ((la->la_valid & LA_CTIME) &&
+ (la->la_ctime < tmp_la->la_ctime))
+ la->la_valid &= ~(LA_MTIME | LA_CTIME);
+
+ if (!(la->la_valid & LA_MTIME) && (now > tmp_la->la_mtime)) {
+ la->la_mtime = now;
+ la->la_valid |= LA_MTIME;
+ }
+ }
+
+ /* For last, ctime must be fixed */
+ if (!(la->la_valid & LA_CTIME) && (now > tmp_la->la_ctime)) {
+ la->la_ctime = now;
+ la->la_valid |= LA_CTIME;
+ }
+
+ RETURN(0);
+}
+
+/* set attr and LOV EA at once, return updated attr */
+static int mdd_attr_set(const struct lu_env *env, struct md_object *obj,
+ const struct md_attr *ma)
+{
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+ struct mdd_device *mdd = mdo2mdd(obj);
+ struct thandle *handle;
+ struct lov_mds_md *lmm = NULL;
+ int rc = 0, lmm_size = 0, max_size = 0;
+ struct lu_attr *la_copy = &mdd_env_info(env)->mti_la_for_fix;
+ ENTRY;
+
+ mdd_txn_param_build(env, mdd, MDD_TXN_ATTR_SET_OP);
+ handle = mdd_trans_start(env, mdd);
+ if (IS_ERR(handle))
+ RETURN(PTR_ERR(handle));
+ /*TODO: add lock here*/
+ /* start a log jounal handle if needed */
+ if (S_ISREG(mdd_object_type(mdd_obj)) &&
+ ma->ma_attr.la_valid & (LA_UID | LA_GID)) {
+ max_size = mdd_lov_mdsize(env, mdd);
+ OBD_ALLOC(lmm, max_size);
+ if (lmm == NULL)
+ GOTO(cleanup, rc = -ENOMEM);
+
+ rc = mdd_get_md_locked(env, mdd_obj, lmm, &lmm_size,
+ MDS_LOV_MD_NAME);
+
+ if (rc < 0)
+ GOTO(cleanup, rc);
+ }
+
+ if (ma->ma_attr.la_valid & (ATTR_MTIME | ATTR_CTIME))
+ CDEBUG(D_INODE, "setting mtime "LPU64", ctime "LPU64"\n",
+ ma->ma_attr.la_mtime, ma->ma_attr.la_ctime);
+
+ *la_copy = ma->ma_attr;
+ mdd_write_lock(env, mdd_obj);
+ rc = mdd_fix_attr(env, mdd_obj, la_copy);
+ mdd_write_unlock(env, mdd_obj);
+ if (rc)
+ GOTO(cleanup, rc);
+
+ if (la_copy->la_valid & LA_FLAGS) {
+ rc = mdd_attr_set_internal_locked(env, mdd_obj, la_copy,
+ handle);
+ if (rc == 0)
+ mdd_flags_xlate(mdd_obj, la_copy->la_flags);
+ } else if (la_copy->la_valid) { /* setattr */
+ rc = mdd_attr_set_internal_locked(env, mdd_obj, la_copy,
+ handle);
+ /* journal chown/chgrp in llog, just like unlink */
+ if (rc == 0 && lmm_size){
+ /*TODO set_attr llog */
+ }
+ }
+
+ if (rc == 0 && ma->ma_valid & MA_LOV) {
+ umode_t mode;
+
+ mode = mdd_object_type(mdd_obj);
+ if (S_ISREG(mode) || S_ISDIR(mode)) {
+ /*TODO check permission*/
+ rc = mdd_lov_set_md(env, NULL, mdd_obj, ma->ma_lmm,
+ ma->ma_lmm_size, handle, 1);
+ }
+
+ }
+cleanup:
+ mdd_trans_stop(env, mdd, rc, handle);
+ if (rc == 0 && lmm_size) {
+ /*set obd attr, if needed*/
+ rc = mdd_lov_setattr_async(env, mdd_obj, lmm, lmm_size);
+ }
+ if (lmm != NULL) {
+ OBD_FREE(lmm, max_size);
+ }
+
+ RETURN(rc);
+}
+
+int mdd_xattr_set_txn(const struct lu_env *env, struct mdd_object *obj,
+ const struct lu_buf *buf, const char *name, int fl,
+ struct thandle *handle)
+{
+ int rc;
+ ENTRY;
+
+ mdd_write_lock(env, obj);
+ rc = __mdd_xattr_set(env, obj, buf, name, fl, handle);
+ mdd_write_unlock(env, obj);
+
+ RETURN(rc);
+}
+
+static int mdd_xattr_sanity_check(const struct lu_env *env,
+ struct mdd_object *obj)
+{
+ struct lu_attr *tmp_la = &mdd_env_info(env)->mti_la;
+ struct md_ucred *uc = md_ucred(env);
+ int rc;
+ ENTRY;
+
+ if (mdd_is_immutable(obj) || mdd_is_append(obj))
+ RETURN(-EPERM);
+
+ mdd_read_lock(env, obj);
+ rc = mdd_la_get(env, obj, tmp_la, BYPASS_CAPA);
+ mdd_read_unlock(env, obj);
+ if (rc)
+ RETURN(rc);
+
+ if ((uc->mu_fsuid != tmp_la->la_uid) && !mdd_capable(uc, CAP_FOWNER))
+ RETURN(-EPERM);
+
+ RETURN(rc);
+}
+
+static int mdd_xattr_set(const struct lu_env *env, struct md_object *obj,
+ const struct lu_buf *buf, const char *name, int fl)
+{
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+ struct mdd_device *mdd = mdo2mdd(obj);
+ struct thandle *handle;
+ int rc;
+ ENTRY;
+
+ rc = mdd_xattr_sanity_check(env, mdd_obj);
+ if (rc)
+ RETURN(rc);
+
+ mdd_txn_param_build(env, mdd, MDD_TXN_XATTR_SET_OP);
+ handle = mdd_trans_start(env, mdd);
+ if (IS_ERR(handle))
+ RETURN(PTR_ERR(handle));
+
+ rc = mdd_xattr_set_txn(env, md2mdd_obj(obj), buf, name,
+ fl, handle);
+#ifdef HAVE_SPLIT_SUPPORT
+ if (rc == 0) {
+ /*
+ * XXX: Very ugly hack, if setting lmv, it means splitting
+ * sucess, we should return -ERESTART to notify the client, so
+ * transno for this splitting should be zero according to the
+ * replay rules. so return -ERESTART here let mdt trans stop
+ * callback know this.
+ */
+ if (strncmp(name, MDS_LMV_MD_NAME, strlen(name)) == 0)
+ rc = -ERESTART;
+ }
+#endif
+ mdd_trans_stop(env, mdd, rc, handle);
+
+ RETURN(rc);
+}
+
+static int __mdd_xattr_del(const struct lu_env *env,struct mdd_device *mdd,
+ struct mdd_object *obj,
+ const char *name, struct thandle *handle)
+{
+ struct dt_object *next;
+
+ LASSERT(lu_object_exists(mdd2lu_obj(obj)));
+ next = mdd_object_child(obj);
+ return next->do_ops->do_xattr_del(env, next, name, handle,
+ mdd_object_capa(env, obj));
+}
+
+int mdd_xattr_del(const struct lu_env *env, struct md_object *obj,
+ const char *name)
+{
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+ struct mdd_device *mdd = mdo2mdd(obj);
+ struct thandle *handle;
+ int rc;
+ ENTRY;
+
+ rc = mdd_xattr_sanity_check(env, mdd_obj);
+ if (rc)
+ RETURN(rc);
+
+ mdd_txn_param_build(env, mdd, MDD_TXN_XATTR_SET_OP);
+ handle = mdd_trans_start(env, mdd);
+ if (IS_ERR(handle))
+ RETURN(PTR_ERR(handle));
+
+ mdd_write_lock(env, mdd_obj);
+ rc = __mdd_xattr_del(env, mdd, md2mdd_obj(obj), name, handle);
+ mdd_write_unlock(env, mdd_obj);
+
+ mdd_trans_stop(env, mdd, rc, handle);
+
+ RETURN(rc);
+}
+
+/* partial unlink */
+static int mdd_ref_del(const struct lu_env *env, struct md_object *obj,
+ struct md_attr *ma)
+{
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+ struct mdd_device *mdd = mdo2mdd(obj);
+ struct thandle *handle;
+ int rc;
+ ENTRY;
+
+ rc = mdd_log_txn_param_build(env, mdd_obj, ma, MDD_TXN_UNLINK_OP);
+ if (rc)
+ RETURN(rc);
+
+ handle = mdd_trans_start(env, mdd);
+ if (IS_ERR(handle))
+ RETURN(-ENOMEM);
+
+ mdd_write_lock(env, mdd_obj);
+
+ rc = mdd_unlink_sanity_check(env, NULL, mdd_obj, ma);
+ if (rc)
+ GOTO(cleanup, rc);
+
+ mdd_ref_del_internal(env, mdd_obj, handle);
+
+ if (S_ISDIR(lu_object_attr(&obj->mo_lu))) {
+ /* unlink dot */
+ mdd_ref_del_internal(env, mdd_obj, handle);
+ }
+
+ rc = mdd_finish_unlink(env, mdd_obj, ma, handle);
+
+ EXIT;
+cleanup:
+ mdd_write_unlock(env, mdd_obj);
+ mdd_trans_stop(env, mdd, rc, handle);
+ return rc;
+}
+
+/* partial operation */
+static int mdd_oc_sanity_check(const struct lu_env *env,
+ struct mdd_object *obj,
+ struct md_attr *ma)
+{
+ int rc;
+ ENTRY;
+
+ switch (ma->ma_attr.la_mode & S_IFMT) {
+ case S_IFREG:
+ case S_IFDIR:
+ case S_IFLNK:
+ case S_IFCHR:
+ case S_IFBLK:
+ case S_IFIFO:
+ case S_IFSOCK:
+ rc = 0;
+ break;
+ default:
+ rc = -EINVAL;
+ break;
+ }
+ RETURN(rc);
+}
+
+static int mdd_object_create(const struct lu_env *env,
+ struct md_object *obj,
+ const struct md_create_spec *spec,
+ struct md_attr *ma)
+{
+
+ struct mdd_device *mdd = mdo2mdd(obj);
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+ const struct lu_fid *pfid = spec->u.sp_pfid;
+ struct thandle *handle;
+ int rc;
+ ENTRY;
+
+ rc = mdd_oc_sanity_check(env, mdd_obj, ma);
+ if (rc)
+ RETURN(rc);
+
+ mdd_txn_param_build(env, mdd, MDD_TXN_OBJECT_CREATE_OP);
+ handle = mdd_trans_start(env, mdd);
+ if (IS_ERR(handle))
+ RETURN(PTR_ERR(handle));
+ mdd_write_lock(env, mdd_obj);
+ rc = mdd_object_create_internal(env, mdd_obj, ma, handle);
+ if (rc)
+ GOTO(unlock, rc);
+
+ if (spec->sp_cr_flags & MDS_CREATE_SLAVE_OBJ) {
+ /* If creating the slave object, set slave EA here. */
+ int lmv_size = spec->u.sp_ea.eadatalen;
+ struct lmv_stripe_md *lmv;
+
+ lmv = (struct lmv_stripe_md *)spec->u.sp_ea.eadata;
+ LASSERT(lmv != NULL && lmv_size > 0);
+
+ rc = __mdd_xattr_set(env, mdd_obj,
+ mdd_buf_get_const(env, lmv, lmv_size),
+ MDS_LMV_MD_NAME, 0, handle);
+ if (rc)
+ GOTO(unlock, rc);
+ pfid = spec->u.sp_ea.fid;
+
+ CDEBUG(D_INFO, "Set slave ea "DFID", eadatalen %d, rc %d\n",
+ PFID(mdo2fid(mdd_obj)), spec->u.sp_ea.eadatalen, rc);
+ rc = mdd_attr_set_internal(env, mdd_obj, &ma->ma_attr, handle, 0);
+ } else {
+#ifdef CONFIG_FS_POSIX_ACL
+ if (spec->sp_cr_flags & MDS_CREATE_RMT_ACL) {
+ struct lu_buf *buf = &mdd_env_info(env)->mti_buf;
+
+ buf->lb_buf = (void *)spec->u.sp_ea.eadata;
+ buf->lb_len = spec->u.sp_ea.eadatalen;
+ if ((buf->lb_len > 0) && (buf->lb_buf != NULL)) {
+ rc = __mdd_acl_init(env, mdd_obj, buf,
+ &ma->ma_attr.la_mode,
+ handle);
+ if (rc)
+ GOTO(unlock, rc);
+ else
+ ma->ma_attr.la_valid |= LA_MODE;
+ }
+ }
+#endif
+ rc = mdd_object_initialize(env, pfid, mdd_obj, ma, handle);
+ }
+ EXIT;
+unlock:
+ mdd_write_unlock(env, mdd_obj);
+ if (rc == 0)
+ rc = mdd_attr_get_internal_locked(env, mdd_obj, ma);
+
+ mdd_trans_stop(env, mdd, rc, handle);
+ return rc;
+}
+
+/*
+ * XXX: if permission check is needed here?
+ */
+static int mdd_ref_add(const struct lu_env *env,
+ struct md_object *obj)
+{
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+ struct mdd_device *mdd = mdo2mdd(obj);
+ struct thandle *handle;
+ int rc;
+ ENTRY;
+
+ mdd_txn_param_build(env, mdd, MDD_TXN_XATTR_SET_OP);
+ handle = mdd_trans_start(env, mdd);
+ if (IS_ERR(handle))
+ RETURN(-ENOMEM);
+
+ mdd_write_lock(env, mdd_obj);
+ rc = mdd_link_sanity_check(env, NULL, mdd_obj);
+ if (!rc)
+ mdd_ref_add_internal(env, mdd_obj, handle);
+ mdd_write_unlock(env, mdd_obj);
+
+ mdd_trans_stop(env, mdd, 0, handle);
+
+ RETURN(0);
+}
+
+/* do NOT or the MAY_*'s, you'll get the weakest */
+static int accmode(struct mdd_object *mdd_obj, int flags)
+{
+ int res = 0;
+
+#if 0
+ /* Sadly, NFSD reopens a file repeatedly during operation, so the
+ * "acc_mode = 0" allowance for newly-created files isn't honoured.
+ * NFSD uses the MDS_OPEN_OWNEROVERRIDE flag to say that a file
+ * owner can write to a file even if it is marked readonly to hide
+ * its brokenness. (bug 5781) */
+ if (flags & MDS_OPEN_OWNEROVERRIDE && inode->i_uid == current->fsuid)
+ return 0;
+#endif
+ if (flags & FMODE_READ)
+ res = MAY_READ;
+ if (flags & (FMODE_WRITE | MDS_OPEN_TRUNC | MDS_OPEN_APPEND))
+ res |= MAY_WRITE;
+ if (flags & MDS_FMODE_EXEC)
+ res = MAY_EXEC;
+ return res;
+}
+
+static int mdd_open_sanity_check(const struct lu_env *env,
+ struct mdd_object *obj, int flag)
+{
+ struct lu_attr *tmp_la = &mdd_env_info(env)->mti_la;
+ int mode = accmode(obj, flag);
+ int rc;
+ ENTRY;
+
+ /* EEXIST check */
+ if (mdd_is_dead_obj(obj))
+ RETURN(-ENOENT);
+
+ rc = mdd_la_get(env, obj, tmp_la, BYPASS_CAPA);
+ if (rc)
+ RETURN(rc);
+
+ if (S_ISLNK(tmp_la->la_mode))
+ RETURN(-ELOOP);
+
+ if (S_ISDIR(tmp_la->la_mode) && (mode & MAY_WRITE))
+ RETURN(-EISDIR);
+
+ if (!(flag & MDS_OPEN_CREATED)) {
+ rc = __mdd_permission_internal(env, obj, mode, 0);
+ if (rc)
+ RETURN(rc);
+ }
+
+ /*
+ * FIFO's, sockets and device files are special: they don't
+ * actually live on the filesystem itself, and as such you
+ * can write to them even if the filesystem is read-only.
+ */
+ if (S_ISFIFO(tmp_la->la_mode) || S_ISSOCK(tmp_la->la_mode) ||
+ S_ISBLK(tmp_la->la_mode) || S_ISCHR(tmp_la->la_mode))
+ flag &= ~O_TRUNC;
+
+ /*
+ * An append-only file must be opened in append mode for writing.
+ */
+ if (mdd_is_append(obj)) {
+ if ((flag & FMODE_WRITE) && !(flag & O_APPEND))
+ RETURN(-EPERM);
+ if (flag & O_TRUNC)
+ RETURN(-EPERM);
+ }
+
+ /* O_NOATIME can only be set by the owner or superuser */
+ if (flag & O_NOATIME) {
+ struct md_ucred *uc = md_ucred(env);
+
+ if (uc->mu_fsuid != tmp_la->la_uid &&
+ !mdd_capable(uc, CAP_FOWNER))
+ RETURN(-EPERM);
+ }
+
+ RETURN(0);
+}
+
+static int mdd_open(const struct lu_env *env, struct md_object *obj,
+ int flags)
+{
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+ int rc = 0;
+
+ mdd_write_lock(env, mdd_obj);
+
+ rc = mdd_open_sanity_check(env, mdd_obj, flags);
+ if (rc == 0)
+ mdd_obj->mod_count++;
+
+ mdd_write_unlock(env, mdd_obj);
+ return rc;
+}
+
+/* return md_attr back,
+ * if it is last unlink then return lov ea + llog cookie*/
+int mdd_object_kill(const struct lu_env *env, struct mdd_object *obj,
+ struct md_attr *ma)
+{
+ int rc = 0;
+ ENTRY;
+
+ mdd_set_dead_obj(obj);
+ if (S_ISREG(mdd_object_type(obj))) {
+ /* Return LOV & COOKIES unconditionally here. We clean evth up.
+ * Caller must be ready for that. */
+ rc = __mdd_lmm_get(env, obj, ma);
+ if ((ma->ma_valid & MA_LOV))
+ rc = mdd_unlink_log(env, mdo2mdd(&obj->mod_obj),
+ obj, ma);
+ }
+ RETURN(rc);
+}
+
+/*
+ * No permission check is needed.
+ */
+static int mdd_close(const struct lu_env *env, struct md_object *obj,
+ struct md_attr *ma)
+{
+ int rc;
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+ ENTRY;
+
+ mdd_write_lock(env, mdd_obj);
+ /* release open count */
+ mdd_obj->mod_count --;
+
+ rc = mdd_iattr_get(env, mdd_obj, ma);
+ if (rc == 0 && mdd_obj->mod_count == 0) {
+ if (ma->ma_attr.la_nlink == 0)
+ rc = mdd_object_kill(env, mdd_obj, ma);
+ }
+ mdd_write_unlock(env, mdd_obj);
+ RETURN(rc);
+}
+
+/*
+ * Permission check is done when open,
+ * no need check again.
+ */
+static int mdd_readpage_sanity_check(const struct lu_env *env,
+ struct mdd_object *obj)
+{
+ struct dt_object *next = mdd_object_child(obj);
+ int rc;
+ ENTRY;
+
+ if (S_ISDIR(mdd_object_type(obj)) && dt_try_as_dir(env, next))
+#if 0
+ rc = mdd_permission_internal(env, obj, MAY_READ);
+#else
+ rc = 0;
+#endif
+ else
+ rc = -ENOTDIR;
+
+ RETURN(rc);
+}
+
+static int mdd_readpage(const struct lu_env *env, struct md_object *obj,
+ const struct lu_rdpg *rdpg)
+{
+ struct dt_object *next;
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+ int rc;
+ ENTRY;
+
+ LASSERT(lu_object_exists(mdd2lu_obj(mdd_obj)));
+ next = mdd_object_child(mdd_obj);
+
+ mdd_read_lock(env, mdd_obj);
+ rc = mdd_readpage_sanity_check(env, mdd_obj);
+ if (rc)
+ GOTO(out_unlock, rc);
+
+ rc = next->do_ops->do_readpage(env, next, rdpg,
+ mdd_object_capa(env, mdd_obj));
+
+out_unlock:
+ mdd_read_unlock(env, mdd_obj);
+ RETURN(rc);
+}
+
+struct md_object_operations mdd_obj_ops = {
+ .moo_permission = mdd_permission,
+ .moo_attr_get = mdd_attr_get,
+ .moo_attr_set = mdd_attr_set,
+ .moo_xattr_get = mdd_xattr_get,
+ .moo_xattr_set = mdd_xattr_set,
+ .moo_xattr_list = mdd_xattr_list,
+ .moo_xattr_del = mdd_xattr_del,
+ .moo_object_create = mdd_object_create,
+ .moo_ref_add = mdd_ref_add,
+ .moo_ref_del = mdd_ref_del,
+ .moo_open = mdd_open,
+ .moo_close = mdd_close,
+ .moo_readpage = mdd_readpage,
+ .moo_readlink = mdd_readlink,
+ .moo_capa_get = mdd_capa_get
+};
git://git.whamcloud.com / fs / lustre-release.git / commitdiff