diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/include/linux/lvfs.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/include/linux/lvfs.h | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/include/linux/lvfs.h b/drivers/staging/lustre/lustre/include/linux/lvfs.h new file mode 100644 index 000000000000..eb59ac7d5946 --- /dev/null +++ b/drivers/staging/lustre/lustre/include/linux/lvfs.h @@ -0,0 +1,134 @@ +/* + * 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.sun.com/software/products/lustre/docs/GPLv2.pdf + * + * 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. + * + * GPL HEADER END + */ +/* + * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2012, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * lustre/include/linux/lvfs.h + * + * lustre VFS/process permission interface + */ + +#ifndef __LINUX_LVFS_H__ +#define __LINUX_LVFS_H__ + +#ifndef __LVFS_H__ +#error Do not #include this file directly. #include <lvfs.h> instead +#endif + +#include <linux/lustre_compat25.h> +#include <linux/lustre_common.h> +#include <linux/lvfs_linux.h> + +#define LLOG_LVFS + +/* simple.c */ + +struct lvfs_ucred { + __u32 luc_uid; + __u32 luc_gid; + __u32 luc_fsuid; + __u32 luc_fsgid; + kernel_cap_t luc_cap; + __u32 luc_umask; + struct group_info *luc_ginfo; + struct md_identity *luc_identity; +}; + +struct lvfs_callback_ops { + struct dentry *(*l_fid2dentry)(__u64 id_ino, __u32 gen, __u64 gr, void *data); +}; + +#define OBD_RUN_CTXT_MAGIC 0xC0FFEEAA +#define OBD_CTXT_DEBUG /* development-only debugging */ +struct lvfs_run_ctxt { + struct vfsmount *pwdmnt; + struct dentry *pwd; + mm_segment_t fs; + struct lvfs_ucred luc; + int ngroups; + struct lvfs_callback_ops cb_ops; + struct group_info *group_info; + struct dt_device *dt; +#ifdef OBD_CTXT_DEBUG + __u32 magic; +#endif +}; + +#ifdef OBD_CTXT_DEBUG +#define OBD_SET_CTXT_MAGIC(ctxt) (ctxt)->magic = OBD_RUN_CTXT_MAGIC +#else +#define OBD_SET_CTXT_MAGIC(ctxt) do {} while(0) +#endif + + +int lustre_rename(struct dentry *dir, struct vfsmount *mnt, char *oldname, + char *newname); + +static inline void l_dput(struct dentry *de) +{ + if (!de || IS_ERR(de)) + return; + //shrink_dcache_parent(de); + LASSERT(d_count(de) > 0); + dput(de); +} + +/* We need to hold the inode semaphore over the dcache lookup itself, or we + * run the risk of entering the filesystem lookup path concurrently on SMP + * systems, and instantiating two inodes for the same entry. We still + * protect against concurrent addition/removal races with the DLM locking. + */ +static inline struct dentry *ll_lookup_one_len(const char *fid_name, + struct dentry *dparent, + int fid_namelen) +{ + struct dentry *dchild; + + mutex_lock(&dparent->d_inode->i_mutex); + dchild = lookup_one_len(fid_name, dparent, fid_namelen); + mutex_unlock(&dparent->d_inode->i_mutex); + + if (IS_ERR(dchild) || dchild->d_inode == NULL) + return dchild; + + if (is_bad_inode(dchild->d_inode)) { + CERROR("bad inode returned %lu/%u\n", + dchild->d_inode->i_ino, dchild->d_inode->i_generation); + dput(dchild); + dchild = ERR_PTR(-ENOENT); + } + return dchild; +} + + +#endif |