mirror of https://gitee.com/openkylin/linux.git
825 lines
20 KiB
C
825 lines
20 KiB
C
/*
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* linux/fs/9p/vfs_inode_dotl.c
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*
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* This file contains vfs inode ops for the 9P2000.L protocol.
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*
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* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
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* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to:
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* Free Software Foundation
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* 51 Franklin Street, Fifth Floor
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* Boston, MA 02111-1301 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/pagemap.h>
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#include <linux/stat.h>
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#include <linux/string.h>
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#include <linux/inet.h>
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#include <linux/namei.h>
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#include <linux/idr.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/xattr.h>
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#include <linux/posix_acl.h>
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#include <net/9p/9p.h>
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#include <net/9p/client.h>
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#include "v9fs.h"
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#include "v9fs_vfs.h"
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#include "fid.h"
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#include "cache.h"
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#include "xattr.h"
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#include "acl.h"
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static int
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v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
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dev_t rdev);
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/**
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* v9fs_get_fsgid_for_create - Helper function to get the gid for creating a
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* new file system object. This checks the S_ISGID to determine the owning
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* group of the new file system object.
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*/
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static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
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{
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BUG_ON(dir_inode == NULL);
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if (dir_inode->i_mode & S_ISGID) {
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/* set_gid bit is set.*/
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return dir_inode->i_gid;
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}
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return current_fsgid();
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}
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/**
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* v9fs_dentry_from_dir_inode - helper function to get the dentry from
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* dir inode.
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*
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*/
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static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode)
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{
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struct dentry *dentry;
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spin_lock(&inode->i_lock);
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/* Directory should have only one entry. */
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BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry));
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dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias);
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spin_unlock(&inode->i_lock);
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return dentry;
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}
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struct inode *
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v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
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struct super_block *sb)
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{
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struct inode *ret = NULL;
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int err;
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struct p9_stat_dotl *st;
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st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
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if (IS_ERR(st))
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return ERR_CAST(st);
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ret = v9fs_get_inode(sb, st->st_mode);
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if (IS_ERR(ret)) {
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err = PTR_ERR(ret);
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goto error;
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}
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v9fs_stat2inode_dotl(st, ret);
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ret->i_ino = v9fs_qid2ino(&st->qid);
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#ifdef CONFIG_9P_FSCACHE
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v9fs_vcookie_set_qid(ret, &st->qid);
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v9fs_cache_inode_get_cookie(ret);
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#endif
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err = v9fs_get_acl(ret, fid);
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if (err) {
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iput(ret);
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goto error;
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}
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kfree(st);
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return ret;
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error:
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kfree(st);
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return ERR_PTR(err);
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}
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/**
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* v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
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* @dir: directory inode that is being created
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* @dentry: dentry that is being deleted
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* @mode: create permissions
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* @nd: path information
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*
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*/
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static int
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v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
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struct nameidata *nd)
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{
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int err = 0;
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char *name = NULL;
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gid_t gid;
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int flags;
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mode_t mode;
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struct v9fs_session_info *v9ses;
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struct p9_fid *fid = NULL;
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struct p9_fid *dfid, *ofid;
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struct file *filp;
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struct p9_qid qid;
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struct inode *inode;
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struct posix_acl *pacl = NULL, *dacl = NULL;
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v9ses = v9fs_inode2v9ses(dir);
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if (nd && nd->flags & LOOKUP_OPEN)
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flags = nd->intent.open.flags - 1;
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else {
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/*
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* create call without LOOKUP_OPEN is due
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* to mknod of regular files. So use mknod
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* operation.
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*/
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return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
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}
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name = (char *) dentry->d_name.name;
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P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x "
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"mode:0x%x\n", name, flags, omode);
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dfid = v9fs_fid_lookup(dentry->d_parent);
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if (IS_ERR(dfid)) {
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err = PTR_ERR(dfid);
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P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
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return err;
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}
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/* clone a fid to use for creation */
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ofid = p9_client_walk(dfid, 0, NULL, 1);
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if (IS_ERR(ofid)) {
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err = PTR_ERR(ofid);
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P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
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return err;
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}
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gid = v9fs_get_fsgid_for_create(dir);
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mode = omode;
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/* Update mode based on ACL value */
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err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
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if (err) {
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P9_DPRINTK(P9_DEBUG_VFS,
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"Failed to get acl values in creat %d\n", err);
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goto error;
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}
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err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid);
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if (err < 0) {
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P9_DPRINTK(P9_DEBUG_VFS,
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"p9_client_open_dotl failed in creat %d\n",
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err);
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goto error;
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}
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/* instantiate inode and assign the unopened fid to the dentry */
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fid = p9_client_walk(dfid, 1, &name, 1);
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if (IS_ERR(fid)) {
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err = PTR_ERR(fid);
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P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
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fid = NULL;
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goto error;
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}
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inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
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if (IS_ERR(inode)) {
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err = PTR_ERR(inode);
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P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
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goto error;
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}
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d_instantiate(dentry, inode);
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err = v9fs_fid_add(dentry, fid);
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if (err < 0)
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goto error;
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/* Now set the ACL based on the default value */
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v9fs_set_create_acl(dentry, dacl, pacl);
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/* Since we are opening a file, assign the open fid to the file */
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filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
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if (IS_ERR(filp)) {
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p9_client_clunk(ofid);
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return PTR_ERR(filp);
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}
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filp->private_data = ofid;
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return 0;
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error:
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if (ofid)
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p9_client_clunk(ofid);
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if (fid)
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p9_client_clunk(fid);
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return err;
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}
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/**
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* v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
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* @dir: inode that is being unlinked
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* @dentry: dentry that is being unlinked
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* @mode: mode for new directory
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*
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*/
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static int v9fs_vfs_mkdir_dotl(struct inode *dir,
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struct dentry *dentry, int omode)
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{
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int err;
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struct v9fs_session_info *v9ses;
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struct p9_fid *fid = NULL, *dfid = NULL;
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gid_t gid;
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char *name;
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mode_t mode;
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struct inode *inode;
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struct p9_qid qid;
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struct dentry *dir_dentry;
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struct posix_acl *dacl = NULL, *pacl = NULL;
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P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
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err = 0;
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v9ses = v9fs_inode2v9ses(dir);
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omode |= S_IFDIR;
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if (dir->i_mode & S_ISGID)
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omode |= S_ISGID;
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dir_dentry = v9fs_dentry_from_dir_inode(dir);
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dfid = v9fs_fid_lookup(dir_dentry);
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if (IS_ERR(dfid)) {
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err = PTR_ERR(dfid);
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P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
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dfid = NULL;
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goto error;
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}
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gid = v9fs_get_fsgid_for_create(dir);
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mode = omode;
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/* Update mode based on ACL value */
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err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
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if (err) {
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P9_DPRINTK(P9_DEBUG_VFS,
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"Failed to get acl values in mkdir %d\n", err);
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goto error;
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}
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name = (char *) dentry->d_name.name;
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err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
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if (err < 0)
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goto error;
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/* instantiate inode and assign the unopened fid to the dentry */
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if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
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fid = p9_client_walk(dfid, 1, &name, 1);
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if (IS_ERR(fid)) {
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err = PTR_ERR(fid);
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P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
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err);
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fid = NULL;
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goto error;
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}
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inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
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if (IS_ERR(inode)) {
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err = PTR_ERR(inode);
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P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
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err);
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goto error;
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}
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d_instantiate(dentry, inode);
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err = v9fs_fid_add(dentry, fid);
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if (err < 0)
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goto error;
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fid = NULL;
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} else {
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/*
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* Not in cached mode. No need to populate
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* inode with stat. We need to get an inode
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* so that we can set the acl with dentry
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*/
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inode = v9fs_get_inode(dir->i_sb, mode);
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if (IS_ERR(inode)) {
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err = PTR_ERR(inode);
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goto error;
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}
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d_instantiate(dentry, inode);
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}
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/* Now set the ACL based on the default value */
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v9fs_set_create_acl(dentry, dacl, pacl);
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error:
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if (fid)
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p9_client_clunk(fid);
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return err;
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}
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static int
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v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
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struct kstat *stat)
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{
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int err;
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struct v9fs_session_info *v9ses;
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struct p9_fid *fid;
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struct p9_stat_dotl *st;
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P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
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err = -EPERM;
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v9ses = v9fs_inode2v9ses(dentry->d_inode);
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if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
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return simple_getattr(mnt, dentry, stat);
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fid = v9fs_fid_lookup(dentry);
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if (IS_ERR(fid))
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return PTR_ERR(fid);
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/* Ask for all the fields in stat structure. Server will return
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* whatever it supports
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*/
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st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
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if (IS_ERR(st))
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return PTR_ERR(st);
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v9fs_stat2inode_dotl(st, dentry->d_inode);
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generic_fillattr(dentry->d_inode, stat);
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/* Change block size to what the server returned */
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stat->blksize = st->st_blksize;
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kfree(st);
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return 0;
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}
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/**
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* v9fs_vfs_setattr_dotl - set file metadata
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* @dentry: file whose metadata to set
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* @iattr: metadata assignment structure
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*
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*/
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int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
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{
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int retval;
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struct v9fs_session_info *v9ses;
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struct p9_fid *fid;
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struct p9_iattr_dotl p9attr;
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P9_DPRINTK(P9_DEBUG_VFS, "\n");
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retval = inode_change_ok(dentry->d_inode, iattr);
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if (retval)
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return retval;
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p9attr.valid = iattr->ia_valid;
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p9attr.mode = iattr->ia_mode;
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p9attr.uid = iattr->ia_uid;
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p9attr.gid = iattr->ia_gid;
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p9attr.size = iattr->ia_size;
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p9attr.atime_sec = iattr->ia_atime.tv_sec;
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p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
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p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
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p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
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retval = -EPERM;
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v9ses = v9fs_inode2v9ses(dentry->d_inode);
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fid = v9fs_fid_lookup(dentry);
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if (IS_ERR(fid))
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return PTR_ERR(fid);
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retval = p9_client_setattr(fid, &p9attr);
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if (retval < 0)
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return retval;
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if ((iattr->ia_valid & ATTR_SIZE) &&
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iattr->ia_size != i_size_read(dentry->d_inode)) {
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retval = vmtruncate(dentry->d_inode, iattr->ia_size);
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if (retval)
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return retval;
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}
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setattr_copy(dentry->d_inode, iattr);
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mark_inode_dirty(dentry->d_inode);
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if (iattr->ia_valid & ATTR_MODE) {
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/* We also want to update ACL when we update mode bits */
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retval = v9fs_acl_chmod(dentry);
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if (retval < 0)
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return retval;
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}
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return 0;
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}
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/**
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* v9fs_stat2inode_dotl - populate an inode structure with stat info
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* @stat: stat structure
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* @inode: inode to populate
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* @sb: superblock of filesystem
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*
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*/
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void
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v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
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{
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if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
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inode->i_atime.tv_sec = stat->st_atime_sec;
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inode->i_atime.tv_nsec = stat->st_atime_nsec;
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inode->i_mtime.tv_sec = stat->st_mtime_sec;
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inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
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inode->i_ctime.tv_sec = stat->st_ctime_sec;
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inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
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inode->i_uid = stat->st_uid;
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inode->i_gid = stat->st_gid;
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inode->i_nlink = stat->st_nlink;
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inode->i_mode = stat->st_mode;
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inode->i_rdev = new_decode_dev(stat->st_rdev);
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if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode)))
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init_special_inode(inode, inode->i_mode, inode->i_rdev);
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i_size_write(inode, stat->st_size);
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inode->i_blocks = stat->st_blocks;
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} else {
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if (stat->st_result_mask & P9_STATS_ATIME) {
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inode->i_atime.tv_sec = stat->st_atime_sec;
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inode->i_atime.tv_nsec = stat->st_atime_nsec;
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}
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if (stat->st_result_mask & P9_STATS_MTIME) {
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inode->i_mtime.tv_sec = stat->st_mtime_sec;
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inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
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}
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if (stat->st_result_mask & P9_STATS_CTIME) {
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inode->i_ctime.tv_sec = stat->st_ctime_sec;
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inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
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}
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if (stat->st_result_mask & P9_STATS_UID)
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inode->i_uid = stat->st_uid;
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if (stat->st_result_mask & P9_STATS_GID)
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inode->i_gid = stat->st_gid;
|
|
if (stat->st_result_mask & P9_STATS_NLINK)
|
|
inode->i_nlink = stat->st_nlink;
|
|
if (stat->st_result_mask & P9_STATS_MODE) {
|
|
inode->i_mode = stat->st_mode;
|
|
if ((S_ISBLK(inode->i_mode)) ||
|
|
(S_ISCHR(inode->i_mode)))
|
|
init_special_inode(inode, inode->i_mode,
|
|
inode->i_rdev);
|
|
}
|
|
if (stat->st_result_mask & P9_STATS_RDEV)
|
|
inode->i_rdev = new_decode_dev(stat->st_rdev);
|
|
if (stat->st_result_mask & P9_STATS_SIZE)
|
|
i_size_write(inode, stat->st_size);
|
|
if (stat->st_result_mask & P9_STATS_BLOCKS)
|
|
inode->i_blocks = stat->st_blocks;
|
|
}
|
|
if (stat->st_result_mask & P9_STATS_GEN)
|
|
inode->i_generation = stat->st_gen;
|
|
|
|
/* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
|
|
* because the inode structure does not have fields for them.
|
|
*/
|
|
}
|
|
|
|
static int
|
|
v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
|
|
const char *symname)
|
|
{
|
|
struct v9fs_session_info *v9ses;
|
|
struct p9_fid *dfid;
|
|
struct p9_fid *fid = NULL;
|
|
struct inode *inode;
|
|
struct p9_qid qid;
|
|
char *name;
|
|
int err;
|
|
gid_t gid;
|
|
|
|
name = (char *) dentry->d_name.name;
|
|
P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n",
|
|
dir->i_ino, name, symname);
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
|
|
dfid = v9fs_fid_lookup(dentry->d_parent);
|
|
if (IS_ERR(dfid)) {
|
|
err = PTR_ERR(dfid);
|
|
P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
gid = v9fs_get_fsgid_for_create(dir);
|
|
|
|
/* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
|
|
err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid);
|
|
|
|
if (err < 0) {
|
|
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
|
|
goto error;
|
|
}
|
|
|
|
if (v9ses->cache) {
|
|
/* Now walk from the parent so we can get an unopened fid. */
|
|
fid = p9_client_walk(dfid, 1, &name, 1);
|
|
if (IS_ERR(fid)) {
|
|
err = PTR_ERR(fid);
|
|
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
|
|
err);
|
|
fid = NULL;
|
|
goto error;
|
|
}
|
|
|
|
/* instantiate inode and assign the unopened fid to dentry */
|
|
inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
|
|
err);
|
|
goto error;
|
|
}
|
|
d_instantiate(dentry, inode);
|
|
err = v9fs_fid_add(dentry, fid);
|
|
if (err < 0)
|
|
goto error;
|
|
fid = NULL;
|
|
} else {
|
|
/* Not in cached mode. No need to populate inode with stat */
|
|
inode = v9fs_get_inode(dir->i_sb, S_IFLNK);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
goto error;
|
|
}
|
|
d_instantiate(dentry, inode);
|
|
}
|
|
|
|
error:
|
|
if (fid)
|
|
p9_client_clunk(fid);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* v9fs_vfs_link_dotl - create a hardlink for dotl
|
|
* @old_dentry: dentry for file to link to
|
|
* @dir: inode destination for new link
|
|
* @dentry: dentry for link
|
|
*
|
|
*/
|
|
|
|
static int
|
|
v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
|
|
struct dentry *dentry)
|
|
{
|
|
int err;
|
|
struct p9_fid *dfid, *oldfid;
|
|
char *name;
|
|
struct v9fs_session_info *v9ses;
|
|
struct dentry *dir_dentry;
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n",
|
|
dir->i_ino, old_dentry->d_name.name,
|
|
dentry->d_name.name);
|
|
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
dir_dentry = v9fs_dentry_from_dir_inode(dir);
|
|
dfid = v9fs_fid_lookup(dir_dentry);
|
|
if (IS_ERR(dfid))
|
|
return PTR_ERR(dfid);
|
|
|
|
oldfid = v9fs_fid_lookup(old_dentry);
|
|
if (IS_ERR(oldfid))
|
|
return PTR_ERR(oldfid);
|
|
|
|
name = (char *) dentry->d_name.name;
|
|
|
|
err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
|
|
|
|
if (err < 0) {
|
|
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
|
/* Get the latest stat info from server. */
|
|
struct p9_fid *fid;
|
|
struct p9_stat_dotl *st;
|
|
|
|
fid = v9fs_fid_lookup(old_dentry);
|
|
if (IS_ERR(fid))
|
|
return PTR_ERR(fid);
|
|
|
|
st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
|
|
if (IS_ERR(st))
|
|
return PTR_ERR(st);
|
|
|
|
v9fs_stat2inode_dotl(st, old_dentry->d_inode);
|
|
|
|
kfree(st);
|
|
} else {
|
|
/* Caching disabled. No need to get upto date stat info.
|
|
* This dentry will be released immediately. So, just hold the
|
|
* inode
|
|
*/
|
|
ihold(old_dentry->d_inode);
|
|
}
|
|
d_instantiate(dentry, old_dentry->d_inode);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* v9fs_vfs_mknod_dotl - create a special file
|
|
* @dir: inode destination for new link
|
|
* @dentry: dentry for file
|
|
* @mode: mode for creation
|
|
* @rdev: device associated with special file
|
|
*
|
|
*/
|
|
static int
|
|
v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
|
|
dev_t rdev)
|
|
{
|
|
int err;
|
|
char *name;
|
|
mode_t mode;
|
|
struct v9fs_session_info *v9ses;
|
|
struct p9_fid *fid = NULL, *dfid = NULL;
|
|
struct inode *inode;
|
|
gid_t gid;
|
|
struct p9_qid qid;
|
|
struct dentry *dir_dentry;
|
|
struct posix_acl *dacl = NULL, *pacl = NULL;
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS,
|
|
" %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
|
|
dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev));
|
|
|
|
if (!new_valid_dev(rdev))
|
|
return -EINVAL;
|
|
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
dir_dentry = v9fs_dentry_from_dir_inode(dir);
|
|
dfid = v9fs_fid_lookup(dir_dentry);
|
|
if (IS_ERR(dfid)) {
|
|
err = PTR_ERR(dfid);
|
|
P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
|
|
dfid = NULL;
|
|
goto error;
|
|
}
|
|
|
|
gid = v9fs_get_fsgid_for_create(dir);
|
|
mode = omode;
|
|
/* Update mode based on ACL value */
|
|
err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
|
|
if (err) {
|
|
P9_DPRINTK(P9_DEBUG_VFS,
|
|
"Failed to get acl values in mknod %d\n", err);
|
|
goto error;
|
|
}
|
|
name = (char *) dentry->d_name.name;
|
|
|
|
err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
/* instantiate inode and assign the unopened fid to the dentry */
|
|
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
|
fid = p9_client_walk(dfid, 1, &name, 1);
|
|
if (IS_ERR(fid)) {
|
|
err = PTR_ERR(fid);
|
|
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
|
|
err);
|
|
fid = NULL;
|
|
goto error;
|
|
}
|
|
|
|
inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
|
|
err);
|
|
goto error;
|
|
}
|
|
d_instantiate(dentry, inode);
|
|
err = v9fs_fid_add(dentry, fid);
|
|
if (err < 0)
|
|
goto error;
|
|
fid = NULL;
|
|
} else {
|
|
/*
|
|
* Not in cached mode. No need to populate inode with stat.
|
|
* socket syscall returns a fd, so we need instantiate
|
|
*/
|
|
inode = v9fs_get_inode(dir->i_sb, mode);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
goto error;
|
|
}
|
|
d_instantiate(dentry, inode);
|
|
}
|
|
/* Now set the ACL based on the default value */
|
|
v9fs_set_create_acl(dentry, dacl, pacl);
|
|
error:
|
|
if (fid)
|
|
p9_client_clunk(fid);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* v9fs_vfs_follow_link_dotl - follow a symlink path
|
|
* @dentry: dentry for symlink
|
|
* @nd: nameidata
|
|
*
|
|
*/
|
|
|
|
static void *
|
|
v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd)
|
|
{
|
|
int retval;
|
|
struct p9_fid *fid;
|
|
char *link = __getname();
|
|
char *target;
|
|
|
|
P9_DPRINTK(P9_DEBUG_VFS, "%s\n", dentry->d_name.name);
|
|
|
|
if (!link) {
|
|
link = ERR_PTR(-ENOMEM);
|
|
goto ndset;
|
|
}
|
|
fid = v9fs_fid_lookup(dentry);
|
|
if (IS_ERR(fid)) {
|
|
__putname(link);
|
|
link = ERR_PTR(PTR_ERR(fid));
|
|
goto ndset;
|
|
}
|
|
retval = p9_client_readlink(fid, &target);
|
|
if (!retval) {
|
|
strcpy(link, target);
|
|
kfree(target);
|
|
goto ndset;
|
|
}
|
|
__putname(link);
|
|
link = ERR_PTR(retval);
|
|
ndset:
|
|
nd_set_link(nd, link);
|
|
return NULL;
|
|
}
|
|
|
|
const struct inode_operations v9fs_dir_inode_operations_dotl = {
|
|
.create = v9fs_vfs_create_dotl,
|
|
.lookup = v9fs_vfs_lookup,
|
|
.link = v9fs_vfs_link_dotl,
|
|
.symlink = v9fs_vfs_symlink_dotl,
|
|
.unlink = v9fs_vfs_unlink,
|
|
.mkdir = v9fs_vfs_mkdir_dotl,
|
|
.rmdir = v9fs_vfs_rmdir,
|
|
.mknod = v9fs_vfs_mknod_dotl,
|
|
.rename = v9fs_vfs_rename,
|
|
.getattr = v9fs_vfs_getattr_dotl,
|
|
.setattr = v9fs_vfs_setattr_dotl,
|
|
.setxattr = generic_setxattr,
|
|
.getxattr = generic_getxattr,
|
|
.removexattr = generic_removexattr,
|
|
.listxattr = v9fs_listxattr,
|
|
.check_acl = v9fs_check_acl,
|
|
};
|
|
|
|
const struct inode_operations v9fs_file_inode_operations_dotl = {
|
|
.getattr = v9fs_vfs_getattr_dotl,
|
|
.setattr = v9fs_vfs_setattr_dotl,
|
|
.setxattr = generic_setxattr,
|
|
.getxattr = generic_getxattr,
|
|
.removexattr = generic_removexattr,
|
|
.listxattr = v9fs_listxattr,
|
|
.check_acl = v9fs_check_acl,
|
|
};
|
|
|
|
const struct inode_operations v9fs_symlink_inode_operations_dotl = {
|
|
.readlink = generic_readlink,
|
|
.follow_link = v9fs_vfs_follow_link_dotl,
|
|
.put_link = v9fs_vfs_put_link,
|
|
.getattr = v9fs_vfs_getattr_dotl,
|
|
.setattr = v9fs_vfs_setattr_dotl,
|
|
.setxattr = generic_setxattr,
|
|
.getxattr = generic_getxattr,
|
|
.removexattr = generic_removexattr,
|
|
.listxattr = v9fs_listxattr,
|
|
};
|