mirror of
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first commit
This commit is contained in:
Fabio Belavenuto
999
addons/9p/src/4.4.180/vfs_inode_dotl.c
Normal file
999
addons/9p/src/4.4.180/vfs_inode_dotl.c
Normal file
@@ -0,0 +1,999 @@
|
||||
/*
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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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||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to:
|
||||
* Free Software Foundation
|
||||
* 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, umode_t 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 kgid_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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static int v9fs_test_inode_dotl(struct inode *inode, void *data)
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{
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struct v9fs_inode *v9inode = V9FS_I(inode);
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struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
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/* don't match inode of different type */
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if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
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return 0;
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if (inode->i_generation != st->st_gen)
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return 0;
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/* compare qid details */
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if (memcmp(&v9inode->qid.version,
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&st->qid.version, sizeof(v9inode->qid.version)))
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return 0;
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if (v9inode->qid.type != st->qid.type)
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return 0;
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if (v9inode->qid.path != st->qid.path)
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return 0;
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return 1;
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}
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/* Always get a new inode */
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static int v9fs_test_new_inode_dotl(struct inode *inode, void *data)
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{
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return 0;
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}
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static int v9fs_set_inode_dotl(struct inode *inode, void *data)
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{
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struct v9fs_inode *v9inode = V9FS_I(inode);
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struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
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memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
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inode->i_generation = st->st_gen;
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return 0;
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}
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static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
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struct p9_qid *qid,
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struct p9_fid *fid,
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struct p9_stat_dotl *st,
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int new)
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{
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int retval;
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unsigned long i_ino;
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struct inode *inode;
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struct v9fs_session_info *v9ses = sb->s_fs_info;
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int (*test)(struct inode *, void *);
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if (new)
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test = v9fs_test_new_inode_dotl;
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else
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test = v9fs_test_inode_dotl;
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i_ino = v9fs_qid2ino(qid);
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inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st);
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if (!inode)
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return ERR_PTR(-ENOMEM);
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if (!(inode->i_state & I_NEW))
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return inode;
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/*
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* initialize the inode with the stat info
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* FIXME!! we may need support for stale inodes
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* later.
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*/
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inode->i_ino = i_ino;
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retval = v9fs_init_inode(v9ses, inode,
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st->st_mode, new_decode_dev(st->st_rdev));
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if (retval)
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goto error;
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v9fs_stat2inode_dotl(st, inode, 0);
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v9fs_cache_inode_get_cookie(inode);
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retval = v9fs_get_acl(inode, fid);
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if (retval)
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goto error;
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unlock_new_inode(inode);
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return inode;
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error:
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iget_failed(inode);
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return ERR_PTR(retval);
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}
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struct inode *
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v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
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struct super_block *sb, int new)
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{
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struct p9_stat_dotl *st;
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struct inode *inode = NULL;
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st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
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if (IS_ERR(st))
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return ERR_CAST(st);
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inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new);
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kfree(st);
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return inode;
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}
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struct dotl_openflag_map {
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int open_flag;
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int dotl_flag;
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};
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static int v9fs_mapped_dotl_flags(int flags)
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{
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int i;
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int rflags = 0;
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struct dotl_openflag_map dotl_oflag_map[] = {
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{ O_CREAT, P9_DOTL_CREATE },
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{ O_EXCL, P9_DOTL_EXCL },
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{ O_NOCTTY, P9_DOTL_NOCTTY },
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{ O_APPEND, P9_DOTL_APPEND },
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{ O_NONBLOCK, P9_DOTL_NONBLOCK },
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{ O_DSYNC, P9_DOTL_DSYNC },
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{ FASYNC, P9_DOTL_FASYNC },
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{ O_DIRECT, P9_DOTL_DIRECT },
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{ O_LARGEFILE, P9_DOTL_LARGEFILE },
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{ O_DIRECTORY, P9_DOTL_DIRECTORY },
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{ O_NOFOLLOW, P9_DOTL_NOFOLLOW },
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{ O_NOATIME, P9_DOTL_NOATIME },
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{ O_CLOEXEC, P9_DOTL_CLOEXEC },
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{ O_SYNC, P9_DOTL_SYNC},
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};
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for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
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if (flags & dotl_oflag_map[i].open_flag)
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rflags |= dotl_oflag_map[i].dotl_flag;
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}
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return rflags;
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}
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/**
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* v9fs_open_to_dotl_flags- convert Linux specific open flags to
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* plan 9 open flag.
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* @flags: flags to convert
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*/
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int v9fs_open_to_dotl_flags(int flags)
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{
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int rflags = 0;
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/*
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* We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
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* and P9_DOTL_NOACCESS
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*/
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rflags |= flags & O_ACCMODE;
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rflags |= v9fs_mapped_dotl_flags(flags);
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return rflags;
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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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* @omode: create permissions
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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, umode_t omode,
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bool excl)
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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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static int
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v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
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struct file *file, unsigned flags, umode_t omode,
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int *opened)
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{
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||||
int err = 0;
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||||
kgid_t gid;
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umode_t mode;
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||||
char *name = NULL;
|
||||
struct p9_qid qid;
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struct inode *inode;
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||||
struct p9_fid *fid = NULL;
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struct v9fs_inode *v9inode;
|
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struct p9_fid *dfid, *ofid, *inode_fid;
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struct v9fs_session_info *v9ses;
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struct posix_acl *pacl = NULL, *dacl = NULL;
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struct dentry *res = NULL;
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if (d_unhashed(dentry)) {
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res = v9fs_vfs_lookup(dir, dentry, 0);
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if (IS_ERR(res))
|
||||
return PTR_ERR(res);
|
||||
|
||||
if (res)
|
||||
dentry = res;
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||||
}
|
||||
|
||||
/* Only creates */
|
||||
if (!(flags & O_CREAT) || d_really_is_positive(dentry))
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||||
return finish_no_open(file, res);
|
||||
|
||||
v9ses = v9fs_inode2v9ses(dir);
|
||||
|
||||
name = (char *) dentry->d_name.name;
|
||||
p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%hx\n",
|
||||
name, flags, omode);
|
||||
|
||||
dfid = v9fs_fid_lookup(dentry->d_parent);
|
||||
if (IS_ERR(dfid)) {
|
||||
err = PTR_ERR(dfid);
|
||||
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* clone a fid to use for creation */
|
||||
ofid = p9_client_walk(dfid, 0, NULL, 1);
|
||||
if (IS_ERR(ofid)) {
|
||||
err = PTR_ERR(ofid);
|
||||
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
|
||||
goto out;
|
||||
}
|
||||
|
||||
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_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n",
|
||||
err);
|
||||
goto error;
|
||||
}
|
||||
err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags),
|
||||
mode, gid, &qid);
|
||||
if (err < 0) {
|
||||
p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n",
|
||||
err);
|
||||
goto error;
|
||||
}
|
||||
v9fs_invalidate_inode_attr(dir);
|
||||
|
||||
/* instantiate inode and assign the unopened fid to the dentry */
|
||||
fid = p9_client_walk(dfid, 1, &name, 1);
|
||||
if (IS_ERR(fid)) {
|
||||
err = PTR_ERR(fid);
|
||||
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
|
||||
fid = NULL;
|
||||
goto error;
|
||||
}
|
||||
inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
|
||||
if (IS_ERR(inode)) {
|
||||
err = PTR_ERR(inode);
|
||||
p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
|
||||
goto error;
|
||||
}
|
||||
/* Now set the ACL based on the default value */
|
||||
v9fs_set_create_acl(inode, fid, dacl, pacl);
|
||||
|
||||
v9fs_fid_add(dentry, fid);
|
||||
d_instantiate(dentry, inode);
|
||||
|
||||
v9inode = V9FS_I(inode);
|
||||
mutex_lock(&v9inode->v_mutex);
|
||||
if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
|
||||
!v9inode->writeback_fid &&
|
||||
((flags & O_ACCMODE) != O_RDONLY)) {
|
||||
/*
|
||||
* clone a fid and add it to writeback_fid
|
||||
* we do it during open time instead of
|
||||
* page dirty time via write_begin/page_mkwrite
|
||||
* because we want write after unlink usecase
|
||||
* to work.
|
||||
*/
|
||||
inode_fid = v9fs_writeback_fid(dentry);
|
||||
if (IS_ERR(inode_fid)) {
|
||||
err = PTR_ERR(inode_fid);
|
||||
mutex_unlock(&v9inode->v_mutex);
|
||||
goto err_clunk_old_fid;
|
||||
}
|
||||
v9inode->writeback_fid = (void *) inode_fid;
|
||||
}
|
||||
mutex_unlock(&v9inode->v_mutex);
|
||||
/* Since we are opening a file, assign the open fid to the file */
|
||||
err = finish_open(file, dentry, generic_file_open, opened);
|
||||
if (err)
|
||||
goto err_clunk_old_fid;
|
||||
file->private_data = ofid;
|
||||
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
|
||||
v9fs_cache_inode_set_cookie(inode, file);
|
||||
*opened |= FILE_CREATED;
|
||||
out:
|
||||
v9fs_put_acl(dacl, pacl);
|
||||
dput(res);
|
||||
return err;
|
||||
|
||||
error:
|
||||
if (fid)
|
||||
p9_client_clunk(fid);
|
||||
err_clunk_old_fid:
|
||||
if (ofid)
|
||||
p9_client_clunk(ofid);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/**
|
||||
* v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
|
||||
* @dir: inode that is being unlinked
|
||||
* @dentry: dentry that is being unlinked
|
||||
* @omode: mode for new directory
|
||||
*
|
||||
*/
|
||||
|
||||
static int v9fs_vfs_mkdir_dotl(struct inode *dir,
|
||||
struct dentry *dentry, umode_t omode)
|
||||
{
|
||||
int err;
|
||||
struct v9fs_session_info *v9ses;
|
||||
struct p9_fid *fid = NULL, *dfid = NULL;
|
||||
kgid_t gid;
|
||||
char *name;
|
||||
umode_t mode;
|
||||
struct inode *inode;
|
||||
struct p9_qid qid;
|
||||
struct dentry *dir_dentry;
|
||||
struct posix_acl *dacl = NULL, *pacl = NULL;
|
||||
|
||||
p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
|
||||
err = 0;
|
||||
v9ses = v9fs_inode2v9ses(dir);
|
||||
|
||||
omode |= S_IFDIR;
|
||||
if (dir->i_mode & S_ISGID)
|
||||
omode |= S_ISGID;
|
||||
|
||||
dir_dentry = dentry->d_parent;
|
||||
dfid = v9fs_fid_lookup(dir_dentry);
|
||||
if (IS_ERR(dfid)) {
|
||||
err = PTR_ERR(dfid);
|
||||
p9_debug(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_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
|
||||
err);
|
||||
goto error;
|
||||
}
|
||||
name = (char *) dentry->d_name.name;
|
||||
err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
|
||||
if (err < 0)
|
||||
goto error;
|
||||
|
||||
fid = p9_client_walk(dfid, 1, &name, 1);
|
||||
if (IS_ERR(fid)) {
|
||||
err = PTR_ERR(fid);
|
||||
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
|
||||
err);
|
||||
fid = NULL;
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* instantiate inode and assign the unopened fid to the dentry */
|
||||
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
||||
inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
|
||||
if (IS_ERR(inode)) {
|
||||
err = PTR_ERR(inode);
|
||||
p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
|
||||
err);
|
||||
goto error;
|
||||
}
|
||||
v9fs_fid_add(dentry, fid);
|
||||
v9fs_set_create_acl(inode, fid, dacl, pacl);
|
||||
d_instantiate(dentry, inode);
|
||||
fid = NULL;
|
||||
err = 0;
|
||||
} else {
|
||||
/*
|
||||
* Not in cached mode. No need to populate
|
||||
* inode with stat. We need to get an inode
|
||||
* so that we can set the acl with dentry
|
||||
*/
|
||||
inode = v9fs_get_inode(dir->i_sb, mode, 0);
|
||||
if (IS_ERR(inode)) {
|
||||
err = PTR_ERR(inode);
|
||||
goto error;
|
||||
}
|
||||
v9fs_set_create_acl(inode, fid, dacl, pacl);
|
||||
d_instantiate(dentry, inode);
|
||||
}
|
||||
inc_nlink(dir);
|
||||
v9fs_invalidate_inode_attr(dir);
|
||||
error:
|
||||
if (fid)
|
||||
p9_client_clunk(fid);
|
||||
v9fs_put_acl(dacl, pacl);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int
|
||||
v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
|
||||
struct kstat *stat)
|
||||
{
|
||||
struct v9fs_session_info *v9ses;
|
||||
struct p9_fid *fid;
|
||||
struct p9_stat_dotl *st;
|
||||
|
||||
p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
|
||||
v9ses = v9fs_dentry2v9ses(dentry);
|
||||
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
||||
generic_fillattr(d_inode(dentry), stat);
|
||||
return 0;
|
||||
}
|
||||
fid = v9fs_fid_lookup(dentry);
|
||||
if (IS_ERR(fid))
|
||||
return PTR_ERR(fid);
|
||||
|
||||
/* Ask for all the fields in stat structure. Server will return
|
||||
* whatever it supports
|
||||
*/
|
||||
|
||||
st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
|
||||
if (IS_ERR(st))
|
||||
return PTR_ERR(st);
|
||||
|
||||
v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
|
||||
generic_fillattr(d_inode(dentry), stat);
|
||||
/* Change block size to what the server returned */
|
||||
stat->blksize = st->st_blksize;
|
||||
|
||||
kfree(st);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Attribute flags.
|
||||
*/
|
||||
#define P9_ATTR_MODE (1 << 0)
|
||||
#define P9_ATTR_UID (1 << 1)
|
||||
#define P9_ATTR_GID (1 << 2)
|
||||
#define P9_ATTR_SIZE (1 << 3)
|
||||
#define P9_ATTR_ATIME (1 << 4)
|
||||
#define P9_ATTR_MTIME (1 << 5)
|
||||
#define P9_ATTR_CTIME (1 << 6)
|
||||
#define P9_ATTR_ATIME_SET (1 << 7)
|
||||
#define P9_ATTR_MTIME_SET (1 << 8)
|
||||
|
||||
struct dotl_iattr_map {
|
||||
int iattr_valid;
|
||||
int p9_iattr_valid;
|
||||
};
|
||||
|
||||
static int v9fs_mapped_iattr_valid(int iattr_valid)
|
||||
{
|
||||
int i;
|
||||
int p9_iattr_valid = 0;
|
||||
struct dotl_iattr_map dotl_iattr_map[] = {
|
||||
{ ATTR_MODE, P9_ATTR_MODE },
|
||||
{ ATTR_UID, P9_ATTR_UID },
|
||||
{ ATTR_GID, P9_ATTR_GID },
|
||||
{ ATTR_SIZE, P9_ATTR_SIZE },
|
||||
{ ATTR_ATIME, P9_ATTR_ATIME },
|
||||
{ ATTR_MTIME, P9_ATTR_MTIME },
|
||||
{ ATTR_CTIME, P9_ATTR_CTIME },
|
||||
{ ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
|
||||
{ ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
|
||||
};
|
||||
for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
|
||||
if (iattr_valid & dotl_iattr_map[i].iattr_valid)
|
||||
p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
|
||||
}
|
||||
return p9_iattr_valid;
|
||||
}
|
||||
|
||||
/**
|
||||
* v9fs_vfs_setattr_dotl - set file metadata
|
||||
* @dentry: file whose metadata to set
|
||||
* @iattr: metadata assignment structure
|
||||
*
|
||||
*/
|
||||
|
||||
int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
|
||||
{
|
||||
int retval;
|
||||
struct p9_fid *fid;
|
||||
struct p9_iattr_dotl p9attr;
|
||||
struct inode *inode = d_inode(dentry);
|
||||
|
||||
p9_debug(P9_DEBUG_VFS, "\n");
|
||||
|
||||
retval = inode_change_ok(inode, iattr);
|
||||
if (retval)
|
||||
return retval;
|
||||
|
||||
p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
|
||||
p9attr.mode = iattr->ia_mode;
|
||||
p9attr.uid = iattr->ia_uid;
|
||||
p9attr.gid = iattr->ia_gid;
|
||||
p9attr.size = iattr->ia_size;
|
||||
p9attr.atime_sec = iattr->ia_atime.tv_sec;
|
||||
p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
|
||||
p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
|
||||
p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
|
||||
|
||||
fid = v9fs_fid_lookup(dentry);
|
||||
if (IS_ERR(fid))
|
||||
return PTR_ERR(fid);
|
||||
|
||||
/* Write all dirty data */
|
||||
if (S_ISREG(inode->i_mode))
|
||||
filemap_write_and_wait(inode->i_mapping);
|
||||
|
||||
retval = p9_client_setattr(fid, &p9attr);
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
|
||||
if ((iattr->ia_valid & ATTR_SIZE) &&
|
||||
iattr->ia_size != i_size_read(inode))
|
||||
truncate_setsize(inode, iattr->ia_size);
|
||||
|
||||
v9fs_invalidate_inode_attr(inode);
|
||||
setattr_copy(inode, iattr);
|
||||
mark_inode_dirty(inode);
|
||||
if (iattr->ia_valid & ATTR_MODE) {
|
||||
/* We also want to update ACL when we update mode bits */
|
||||
retval = v9fs_acl_chmod(inode, fid);
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* v9fs_stat2inode_dotl - populate an inode structure with stat info
|
||||
* @stat: stat structure
|
||||
* @inode: inode to populate
|
||||
* @flags: ctrl flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE)
|
||||
*
|
||||
*/
|
||||
|
||||
void
|
||||
v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode,
|
||||
unsigned int flags)
|
||||
{
|
||||
umode_t mode;
|
||||
struct v9fs_inode *v9inode = V9FS_I(inode);
|
||||
|
||||
if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
|
||||
inode->i_atime.tv_sec = stat->st_atime_sec;
|
||||
inode->i_atime.tv_nsec = stat->st_atime_nsec;
|
||||
inode->i_mtime.tv_sec = stat->st_mtime_sec;
|
||||
inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
|
||||
inode->i_ctime.tv_sec = stat->st_ctime_sec;
|
||||
inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
|
||||
inode->i_uid = stat->st_uid;
|
||||
inode->i_gid = stat->st_gid;
|
||||
set_nlink(inode, stat->st_nlink);
|
||||
|
||||
mode = stat->st_mode & S_IALLUGO;
|
||||
mode |= inode->i_mode & ~S_IALLUGO;
|
||||
inode->i_mode = mode;
|
||||
|
||||
if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE))
|
||||
v9fs_i_size_write(inode, stat->st_size);
|
||||
inode->i_blocks = stat->st_blocks;
|
||||
} else {
|
||||
if (stat->st_result_mask & P9_STATS_ATIME) {
|
||||
inode->i_atime.tv_sec = stat->st_atime_sec;
|
||||
inode->i_atime.tv_nsec = stat->st_atime_nsec;
|
||||
}
|
||||
if (stat->st_result_mask & P9_STATS_MTIME) {
|
||||
inode->i_mtime.tv_sec = stat->st_mtime_sec;
|
||||
inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
|
||||
}
|
||||
if (stat->st_result_mask & P9_STATS_CTIME) {
|
||||
inode->i_ctime.tv_sec = stat->st_ctime_sec;
|
||||
inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
|
||||
}
|
||||
if (stat->st_result_mask & P9_STATS_UID)
|
||||
inode->i_uid = stat->st_uid;
|
||||
if (stat->st_result_mask & P9_STATS_GID)
|
||||
inode->i_gid = stat->st_gid;
|
||||
if (stat->st_result_mask & P9_STATS_NLINK)
|
||||
set_nlink(inode, 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 (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) &&
|
||||
stat->st_result_mask & P9_STATS_SIZE)
|
||||
v9fs_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.
|
||||
*/
|
||||
v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
|
||||
}
|
||||
|
||||
static int
|
||||
v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
|
||||
const char *symname)
|
||||
{
|
||||
int err;
|
||||
kgid_t gid;
|
||||
char *name;
|
||||
struct p9_qid qid;
|
||||
struct inode *inode;
|
||||
struct p9_fid *dfid;
|
||||
struct p9_fid *fid = NULL;
|
||||
struct v9fs_session_info *v9ses;
|
||||
|
||||
name = (char *) dentry->d_name.name;
|
||||
p9_debug(P9_DEBUG_VFS, "%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_debug(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_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
|
||||
goto error;
|
||||
}
|
||||
|
||||
v9fs_invalidate_inode_attr(dir);
|
||||
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
||||
/* 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_debug(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_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
|
||||
if (IS_ERR(inode)) {
|
||||
err = PTR_ERR(inode);
|
||||
p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
|
||||
err);
|
||||
goto error;
|
||||
}
|
||||
v9fs_fid_add(dentry, fid);
|
||||
d_instantiate(dentry, inode);
|
||||
fid = NULL;
|
||||
err = 0;
|
||||
} else {
|
||||
/* Not in cached mode. No need to populate inode with stat */
|
||||
inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
|
||||
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 dentry *dir_dentry;
|
||||
struct p9_fid *dfid, *oldfid;
|
||||
struct v9fs_session_info *v9ses;
|
||||
|
||||
p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
|
||||
dir->i_ino, old_dentry, dentry);
|
||||
|
||||
v9ses = v9fs_inode2v9ses(dir);
|
||||
dir_dentry = dentry->d_parent;
|
||||
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);
|
||||
|
||||
err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
|
||||
|
||||
if (err < 0) {
|
||||
p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
v9fs_invalidate_inode_attr(dir);
|
||||
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
||||
/* Get the latest stat info from server. */
|
||||
struct p9_fid *fid;
|
||||
fid = v9fs_fid_lookup(old_dentry);
|
||||
if (IS_ERR(fid))
|
||||
return PTR_ERR(fid);
|
||||
|
||||
v9fs_refresh_inode_dotl(fid, d_inode(old_dentry));
|
||||
}
|
||||
ihold(d_inode(old_dentry));
|
||||
d_instantiate(dentry, d_inode(old_dentry));
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
/**
|
||||
* v9fs_vfs_mknod_dotl - create a special file
|
||||
* @dir: inode destination for new link
|
||||
* @dentry: dentry for file
|
||||
* @omode: mode for creation
|
||||
* @rdev: device associated with special file
|
||||
*
|
||||
*/
|
||||
static int
|
||||
v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
|
||||
dev_t rdev)
|
||||
{
|
||||
int err;
|
||||
kgid_t gid;
|
||||
char *name;
|
||||
umode_t mode;
|
||||
struct v9fs_session_info *v9ses;
|
||||
struct p9_fid *fid = NULL, *dfid = NULL;
|
||||
struct inode *inode;
|
||||
struct p9_qid qid;
|
||||
struct dentry *dir_dentry;
|
||||
struct posix_acl *dacl = NULL, *pacl = NULL;
|
||||
|
||||
p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n",
|
||||
dir->i_ino, dentry, omode,
|
||||
MAJOR(rdev), MINOR(rdev));
|
||||
|
||||
v9ses = v9fs_inode2v9ses(dir);
|
||||
dir_dentry = dentry->d_parent;
|
||||
dfid = v9fs_fid_lookup(dir_dentry);
|
||||
if (IS_ERR(dfid)) {
|
||||
err = PTR_ERR(dfid);
|
||||
p9_debug(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_debug(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;
|
||||
|
||||
v9fs_invalidate_inode_attr(dir);
|
||||
fid = p9_client_walk(dfid, 1, &name, 1);
|
||||
if (IS_ERR(fid)) {
|
||||
err = PTR_ERR(fid);
|
||||
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
|
||||
err);
|
||||
fid = NULL;
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* instantiate inode and assign the unopened fid to the dentry */
|
||||
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
||||
inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
|
||||
if (IS_ERR(inode)) {
|
||||
err = PTR_ERR(inode);
|
||||
p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
|
||||
err);
|
||||
goto error;
|
||||
}
|
||||
v9fs_set_create_acl(inode, fid, dacl, pacl);
|
||||
v9fs_fid_add(dentry, fid);
|
||||
d_instantiate(dentry, inode);
|
||||
fid = NULL;
|
||||
err = 0;
|
||||
} 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, rdev);
|
||||
if (IS_ERR(inode)) {
|
||||
err = PTR_ERR(inode);
|
||||
goto error;
|
||||
}
|
||||
v9fs_set_create_acl(inode, fid, dacl, pacl);
|
||||
d_instantiate(dentry, inode);
|
||||
}
|
||||
error:
|
||||
if (fid)
|
||||
p9_client_clunk(fid);
|
||||
v9fs_put_acl(dacl, pacl);
|
||||
return err;
|
||||
}
|
||||
|
||||
/**
|
||||
* v9fs_vfs_follow_link_dotl - follow a symlink path
|
||||
* @dentry: dentry for symlink
|
||||
* @cookie: place to pass the data to put_link()
|
||||
*/
|
||||
|
||||
static const char *
|
||||
v9fs_vfs_follow_link_dotl(struct dentry *dentry, void **cookie)
|
||||
{
|
||||
struct p9_fid *fid = v9fs_fid_lookup(dentry);
|
||||
char *target;
|
||||
int retval;
|
||||
|
||||
p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
|
||||
|
||||
if (IS_ERR(fid))
|
||||
return ERR_CAST(fid);
|
||||
retval = p9_client_readlink(fid, &target);
|
||||
if (retval)
|
||||
return ERR_PTR(retval);
|
||||
return *cookie = target;
|
||||
}
|
||||
|
||||
int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
|
||||
{
|
||||
struct p9_stat_dotl *st;
|
||||
struct v9fs_session_info *v9ses;
|
||||
unsigned int flags;
|
||||
|
||||
v9ses = v9fs_inode2v9ses(inode);
|
||||
st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
|
||||
if (IS_ERR(st))
|
||||
return PTR_ERR(st);
|
||||
/*
|
||||
* Don't update inode if the file type is different
|
||||
*/
|
||||
if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
|
||||
goto out;
|
||||
|
||||
/*
|
||||
* We don't want to refresh inode->i_size,
|
||||
* because we may have cached data
|
||||
*/
|
||||
flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ?
|
||||
V9FS_STAT2INODE_KEEP_ISIZE : 0;
|
||||
v9fs_stat2inode_dotl(st, inode, flags);
|
||||
out:
|
||||
kfree(st);
|
||||
return 0;
|
||||
}
|
||||
|
||||
const struct inode_operations v9fs_dir_inode_operations_dotl = {
|
||||
.create = v9fs_vfs_create_dotl,
|
||||
.atomic_open = v9fs_vfs_atomic_open_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,
|
||||
.get_acl = v9fs_iop_get_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,
|
||||
.get_acl = v9fs_iop_get_acl,
|
||||
};
|
||||
|
||||
const struct inode_operations v9fs_symlink_inode_operations_dotl = {
|
||||
.readlink = generic_readlink,
|
||||
.follow_link = v9fs_vfs_follow_link_dotl,
|
||||
.put_link = kfree_put_link,
|
||||
.getattr = v9fs_vfs_getattr_dotl,
|
||||
.setattr = v9fs_vfs_setattr_dotl,
|
||||
.setxattr = generic_setxattr,
|
||||
.getxattr = generic_getxattr,
|
||||
.removexattr = generic_removexattr,
|
||||
.listxattr = v9fs_listxattr,
|
||||
};
|
||||
Reference in New Issue
Block a user