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10211b4a23
Pointer v9ses is being assigned the value from the return of inlined function v9fs_inode2v9ses (which just returns inode->i_sb->s_fs_info). The pointer is not used after the assignment, so the variable is redundant and can be removed. Cleans up clang scan warnings such as: fs/9p/vfs_inode_dotl.c:300:28: warning: variable 'v9ses' set but not used [-Wunused-but-set-variable] Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Reviewed-by: Dominique Martinet <asmadeus@codewreck.org> Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org>
892 lines
22 KiB
C
892 lines
22 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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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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#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/namei.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 mnt_idmap *idmap, struct inode *dir,
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struct dentry *dentry, umode_t omode, dev_t rdev);
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/**
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* v9fs_get_fsgid_for_create - Helper function to get the gid for a new object
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* @dir_inode: The directory inode
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*
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* 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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struct inode *v9fs_fid_iget_dotl(struct super_block *sb, struct p9_fid *fid)
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{
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int retval;
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struct inode *inode;
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struct p9_stat_dotl *st;
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struct v9fs_session_info *v9ses = sb->s_fs_info;
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inode = iget_locked(sb, QID2INO(&fid->qid));
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if (unlikely(!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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st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
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if (IS_ERR(st)) {
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retval = PTR_ERR(st);
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goto error;
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}
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retval = v9fs_init_inode(v9ses, inode, &fid->qid,
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st->st_mode, new_decode_dev(st->st_rdev));
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v9fs_stat2inode_dotl(st, inode, 0);
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kfree(st);
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if (retval)
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goto error;
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v9fs_set_netfs_context(inode);
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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 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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* @idmap: The user namespace of the mount
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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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* @excl: True if the file must not yet exist
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*
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*/
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static int
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v9fs_vfs_create_dotl(struct mnt_idmap *idmap, struct inode *dir,
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struct dentry *dentry, umode_t omode, bool excl)
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{
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return v9fs_vfs_mknod_dotl(idmap, 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 int flags, umode_t omode)
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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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int p9_omode = v9fs_open_to_dotl_flags(flags);
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const unsigned char *name = NULL;
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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 p9_fid *dfid = NULL, *ofid = NULL;
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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_in_lookup(dentry)) {
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res = v9fs_vfs_lookup(dir, dentry, 0);
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if (IS_ERR(res))
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return PTR_ERR(res);
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if (res)
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dentry = res;
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}
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/* Only creates */
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if (!(flags & O_CREAT) || d_really_is_positive(dentry))
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return finish_no_open(file, res);
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v9ses = v9fs_inode2v9ses(dir);
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name = dentry->d_name.name;
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p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%x\n",
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name, flags, omode);
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dfid = v9fs_parent_fid(dentry);
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if (IS_ERR(dfid)) {
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err = PTR_ERR(dfid);
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p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
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goto out;
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}
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/* clone a fid to use for creation */
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ofid = clone_fid(dfid);
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if (IS_ERR(ofid)) {
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err = PTR_ERR(ofid);
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p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
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goto out;
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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_debug(P9_DEBUG_VFS, "Failed to get acl values in create %d\n",
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err);
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goto out;
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}
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if ((v9ses->cache & CACHE_WRITEBACK) && (p9_omode & P9_OWRITE)) {
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p9_omode = (p9_omode & ~P9_OWRITE) | P9_ORDWR;
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p9_debug(P9_DEBUG_CACHE,
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"write-only file with writeback enabled, creating w/ O_RDWR\n");
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}
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err = p9_client_create_dotl(ofid, name, p9_omode, mode, gid, &qid);
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if (err < 0) {
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p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in create %d\n",
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err);
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goto out;
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}
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v9fs_invalidate_inode_attr(dir);
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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_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
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goto out;
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}
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inode = v9fs_fid_iget_dotl(dir->i_sb, fid);
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if (IS_ERR(inode)) {
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err = PTR_ERR(inode);
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p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
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goto out;
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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(inode, fid, dacl, pacl);
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v9fs_fid_add(dentry, &fid);
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d_instantiate(dentry, inode);
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/* Since we are opening a file, assign the open fid to the file */
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err = finish_open(file, dentry, generic_file_open);
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if (err)
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goto out;
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file->private_data = ofid;
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#ifdef CONFIG_9P_FSCACHE
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if (v9ses->cache & CACHE_FSCACHE) {
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struct v9fs_inode *v9inode = V9FS_I(inode);
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fscache_use_cookie(v9fs_inode_cookie(v9inode),
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file->f_mode & FMODE_WRITE);
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}
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#endif
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v9fs_fid_add_modes(ofid, v9ses->flags, v9ses->cache, flags);
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v9fs_open_fid_add(inode, &ofid);
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file->f_mode |= FMODE_CREATED;
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out:
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p9_fid_put(dfid);
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p9_fid_put(ofid);
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p9_fid_put(fid);
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v9fs_put_acl(dacl, pacl);
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dput(res);
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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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* @idmap: The idmap of the mount
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* @dir: inode that is being unlinked
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* @dentry: dentry that is being unlinked
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* @omode: mode for new directory
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*
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*/
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static int v9fs_vfs_mkdir_dotl(struct mnt_idmap *idmap,
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struct inode *dir, struct dentry *dentry,
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umode_t omode)
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{
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int err;
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struct p9_fid *fid = NULL, *dfid = NULL;
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kgid_t gid;
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const unsigned char *name;
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umode_t mode;
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struct inode *inode;
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struct p9_qid qid;
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struct posix_acl *dacl = NULL, *pacl = NULL;
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p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
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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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dfid = v9fs_parent_fid(dentry);
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if (IS_ERR(dfid)) {
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err = PTR_ERR(dfid);
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p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
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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_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
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err);
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goto error;
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}
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name = 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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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_debug(P9_DEBUG_VFS, "p9_client_walk failed %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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inode = v9fs_fid_iget_dotl(dir->i_sb, fid);
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if (IS_ERR(inode)) {
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err = PTR_ERR(inode);
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p9_debug(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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v9fs_fid_add(dentry, &fid);
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v9fs_set_create_acl(inode, fid, dacl, pacl);
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d_instantiate(dentry, inode);
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err = 0;
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inc_nlink(dir);
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v9fs_invalidate_inode_attr(dir);
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error:
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p9_fid_put(fid);
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v9fs_put_acl(dacl, pacl);
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p9_fid_put(dfid);
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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 mnt_idmap *idmap,
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const struct path *path, struct kstat *stat,
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u32 request_mask, unsigned int flags)
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{
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struct dentry *dentry = path->dentry;
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struct v9fs_session_info *v9ses;
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struct p9_fid *fid;
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struct inode *inode = d_inode(dentry);
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struct p9_stat_dotl *st;
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p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
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v9ses = v9fs_dentry2v9ses(dentry);
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if (v9ses->cache & (CACHE_META|CACHE_LOOSE)) {
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generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
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return 0;
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} else if (v9ses->cache) {
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if (S_ISREG(inode->i_mode)) {
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int retval = filemap_fdatawrite(inode->i_mapping);
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if (retval)
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p9_debug(P9_DEBUG_ERROR,
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"flushing writeback during getattr returned %d\n", retval);
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}
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}
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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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p9_fid_put(fid);
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if (IS_ERR(st))
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return PTR_ERR(st);
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v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
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generic_fillattr(&nop_mnt_idmap, request_mask, d_inode(dentry), 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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* Attribute flags.
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*/
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#define P9_ATTR_MODE (1 << 0)
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#define P9_ATTR_UID (1 << 1)
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#define P9_ATTR_GID (1 << 2)
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#define P9_ATTR_SIZE (1 << 3)
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#define P9_ATTR_ATIME (1 << 4)
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#define P9_ATTR_MTIME (1 << 5)
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#define P9_ATTR_CTIME (1 << 6)
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#define P9_ATTR_ATIME_SET (1 << 7)
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#define P9_ATTR_MTIME_SET (1 << 8)
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struct dotl_iattr_map {
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int iattr_valid;
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int p9_iattr_valid;
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};
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static int v9fs_mapped_iattr_valid(int iattr_valid)
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{
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int i;
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int p9_iattr_valid = 0;
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struct dotl_iattr_map dotl_iattr_map[] = {
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{ ATTR_MODE, P9_ATTR_MODE },
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{ ATTR_UID, P9_ATTR_UID },
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{ ATTR_GID, P9_ATTR_GID },
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{ ATTR_SIZE, P9_ATTR_SIZE },
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{ ATTR_ATIME, P9_ATTR_ATIME },
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{ ATTR_MTIME, P9_ATTR_MTIME },
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{ ATTR_CTIME, P9_ATTR_CTIME },
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{ ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
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{ ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
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};
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for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
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if (iattr_valid & dotl_iattr_map[i].iattr_valid)
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p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
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}
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return p9_iattr_valid;
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}
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/**
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* v9fs_vfs_setattr_dotl - set file metadata
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* @idmap: idmap of the mount
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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 mnt_idmap *idmap,
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struct dentry *dentry, struct iattr *iattr)
|
|
{
|
|
int retval, use_dentry = 0;
|
|
struct inode *inode = d_inode(dentry);
|
|
struct v9fs_session_info __maybe_unused *v9ses;
|
|
struct p9_fid *fid = NULL;
|
|
struct p9_iattr_dotl p9attr = {
|
|
.uid = INVALID_UID,
|
|
.gid = INVALID_GID,
|
|
};
|
|
|
|
p9_debug(P9_DEBUG_VFS, "\n");
|
|
|
|
retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr);
|
|
if (retval)
|
|
return retval;
|
|
|
|
v9ses = v9fs_dentry2v9ses(dentry);
|
|
|
|
p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
|
|
if (iattr->ia_valid & ATTR_MODE)
|
|
p9attr.mode = iattr->ia_mode;
|
|
if (iattr->ia_valid & ATTR_UID)
|
|
p9attr.uid = iattr->ia_uid;
|
|
if (iattr->ia_valid & ATTR_GID)
|
|
p9attr.gid = iattr->ia_gid;
|
|
if (iattr->ia_valid & ATTR_SIZE)
|
|
p9attr.size = iattr->ia_size;
|
|
if (iattr->ia_valid & ATTR_ATIME_SET) {
|
|
p9attr.atime_sec = iattr->ia_atime.tv_sec;
|
|
p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
|
|
}
|
|
if (iattr->ia_valid & ATTR_MTIME_SET) {
|
|
p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
|
|
p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
|
|
}
|
|
|
|
if (iattr->ia_valid & ATTR_FILE) {
|
|
fid = iattr->ia_file->private_data;
|
|
WARN_ON(!fid);
|
|
}
|
|
if (!fid) {
|
|
fid = v9fs_fid_lookup(dentry);
|
|
use_dentry = 1;
|
|
}
|
|
if (IS_ERR(fid))
|
|
return PTR_ERR(fid);
|
|
|
|
/* Write all dirty data */
|
|
if (S_ISREG(inode->i_mode)) {
|
|
retval = filemap_fdatawrite(inode->i_mapping);
|
|
if (retval < 0)
|
|
p9_debug(P9_DEBUG_ERROR,
|
|
"Flushing file prior to setattr failed: %d\n", retval);
|
|
}
|
|
|
|
retval = p9_client_setattr(fid, &p9attr);
|
|
if (retval < 0) {
|
|
if (use_dentry)
|
|
p9_fid_put(fid);
|
|
return retval;
|
|
}
|
|
|
|
if ((iattr->ia_valid & ATTR_SIZE) && iattr->ia_size !=
|
|
i_size_read(inode)) {
|
|
truncate_setsize(inode, iattr->ia_size);
|
|
netfs_resize_file(netfs_inode(inode), iattr->ia_size, true);
|
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
|
if (v9ses->cache & CACHE_FSCACHE)
|
|
fscache_resize_cookie(v9fs_inode_cookie(V9FS_I(inode)),
|
|
iattr->ia_size);
|
|
#endif
|
|
}
|
|
|
|
v9fs_invalidate_inode_attr(inode);
|
|
setattr_copy(&nop_mnt_idmap, 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) {
|
|
if (use_dentry)
|
|
p9_fid_put(fid);
|
|
return retval;
|
|
}
|
|
}
|
|
if (use_dentry)
|
|
p9_fid_put(fid);
|
|
|
|
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_set_atime(inode, stat->st_atime_sec,
|
|
stat->st_atime_nsec);
|
|
inode_set_mtime(inode, stat->st_mtime_sec,
|
|
stat->st_mtime_nsec);
|
|
inode_set_ctime(inode, stat->st_ctime_sec,
|
|
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;
|
|
|
|
v9inode->netfs.remote_i_size = stat->st_size;
|
|
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_set_atime(inode, stat->st_atime_sec,
|
|
stat->st_atime_nsec);
|
|
}
|
|
if (stat->st_result_mask & P9_STATS_MTIME) {
|
|
inode_set_mtime(inode, stat->st_mtime_sec,
|
|
stat->st_mtime_nsec);
|
|
}
|
|
if (stat->st_result_mask & P9_STATS_CTIME) {
|
|
inode_set_ctime(inode, stat->st_ctime_sec,
|
|
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) {
|
|
mode = stat->st_mode & S_IALLUGO;
|
|
mode |= inode->i_mode & ~S_IALLUGO;
|
|
inode->i_mode = mode;
|
|
}
|
|
if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) &&
|
|
stat->st_result_mask & P9_STATS_SIZE) {
|
|
v9inode->netfs.remote_i_size = stat->st_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 mnt_idmap *idmap, struct inode *dir,
|
|
struct dentry *dentry, const char *symname)
|
|
{
|
|
int err;
|
|
kgid_t gid;
|
|
const unsigned char *name;
|
|
struct p9_qid qid;
|
|
struct p9_fid *dfid;
|
|
struct p9_fid *fid = NULL;
|
|
|
|
name = dentry->d_name.name;
|
|
p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
|
|
|
|
dfid = v9fs_parent_fid(dentry);
|
|
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, 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);
|
|
|
|
error:
|
|
p9_fid_put(fid);
|
|
p9_fid_put(dfid);
|
|
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;
|
|
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);
|
|
dfid = v9fs_parent_fid(dentry);
|
|
if (IS_ERR(dfid))
|
|
return PTR_ERR(dfid);
|
|
|
|
oldfid = v9fs_fid_lookup(old_dentry);
|
|
if (IS_ERR(oldfid)) {
|
|
p9_fid_put(dfid);
|
|
return PTR_ERR(oldfid);
|
|
}
|
|
|
|
err = p9_client_link(dfid, oldfid, dentry->d_name.name);
|
|
|
|
p9_fid_put(dfid);
|
|
p9_fid_put(oldfid);
|
|
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_META|CACHE_LOOSE)) {
|
|
/* 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));
|
|
p9_fid_put(fid);
|
|
}
|
|
ihold(d_inode(old_dentry));
|
|
d_instantiate(dentry, d_inode(old_dentry));
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* v9fs_vfs_mknod_dotl - create a special file
|
|
* @idmap: The idmap of the mount
|
|
* @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 mnt_idmap *idmap, struct inode *dir,
|
|
struct dentry *dentry, umode_t omode, dev_t rdev)
|
|
{
|
|
int err;
|
|
kgid_t gid;
|
|
const unsigned char *name;
|
|
umode_t mode;
|
|
struct p9_fid *fid = NULL, *dfid = NULL;
|
|
struct inode *inode;
|
|
struct p9_qid qid;
|
|
struct posix_acl *dacl = NULL, *pacl = NULL;
|
|
|
|
p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n",
|
|
dir->i_ino, dentry, omode,
|
|
MAJOR(rdev), MINOR(rdev));
|
|
|
|
dfid = v9fs_parent_fid(dentry);
|
|
if (IS_ERR(dfid)) {
|
|
err = PTR_ERR(dfid);
|
|
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
|
|
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 = 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);
|
|
goto error;
|
|
}
|
|
inode = v9fs_fid_iget_dotl(dir->i_sb, fid);
|
|
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);
|
|
err = 0;
|
|
error:
|
|
p9_fid_put(fid);
|
|
v9fs_put_acl(dacl, pacl);
|
|
p9_fid_put(dfid);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* v9fs_vfs_get_link_dotl - follow a symlink path
|
|
* @dentry: dentry for symlink
|
|
* @inode: inode for symlink
|
|
* @done: destructor for return value
|
|
*/
|
|
|
|
static const char *
|
|
v9fs_vfs_get_link_dotl(struct dentry *dentry,
|
|
struct inode *inode,
|
|
struct delayed_call *done)
|
|
{
|
|
struct p9_fid *fid;
|
|
char *target;
|
|
int retval;
|
|
|
|
if (!dentry)
|
|
return ERR_PTR(-ECHILD);
|
|
|
|
p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
|
|
|
|
fid = v9fs_fid_lookup(dentry);
|
|
if (IS_ERR(fid))
|
|
return ERR_CAST(fid);
|
|
retval = p9_client_readlink(fid, &target);
|
|
p9_fid_put(fid);
|
|
if (retval)
|
|
return ERR_PTR(retval);
|
|
set_delayed_call(done, kfree_link, target);
|
|
return 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_wrong_type(inode, st->st_mode))
|
|
goto out;
|
|
|
|
/*
|
|
* We don't want to refresh inode->i_size,
|
|
* because we may have cached data
|
|
*/
|
|
flags = (v9ses->cache & CACHE_LOOSE) ?
|
|
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,
|
|
.listxattr = v9fs_listxattr,
|
|
.get_inode_acl = v9fs_iop_get_inode_acl,
|
|
.get_acl = v9fs_iop_get_acl,
|
|
.set_acl = v9fs_iop_set_acl,
|
|
};
|
|
|
|
const struct inode_operations v9fs_file_inode_operations_dotl = {
|
|
.getattr = v9fs_vfs_getattr_dotl,
|
|
.setattr = v9fs_vfs_setattr_dotl,
|
|
.listxattr = v9fs_listxattr,
|
|
.get_inode_acl = v9fs_iop_get_inode_acl,
|
|
.get_acl = v9fs_iop_get_acl,
|
|
.set_acl = v9fs_iop_set_acl,
|
|
};
|
|
|
|
const struct inode_operations v9fs_symlink_inode_operations_dotl = {
|
|
.get_link = v9fs_vfs_get_link_dotl,
|
|
.getattr = v9fs_vfs_getattr_dotl,
|
|
.setattr = v9fs_vfs_setattr_dotl,
|
|
.listxattr = v9fs_listxattr,
|
|
};
|