--- /dev/null
+/*
+ * linux/fs/9p/vfs_inode.c
+ *
+ * This file contains vfs inode ops for the 9P2000 protocol.
+ *
+ * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
+ * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * 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
+ * Boston, MA 02111-1301 USA
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/pagemap.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <linux/inet.h>
+#include <linux/namei.h>
+#include <linux/idr.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/xattr.h>
+#include <linux/posix_acl.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
+
+#include "v9fs.h"
+#include "v9fs_vfs.h"
+#include "fid.h"
+#include "cache.h"
+#include "xattr.h"
+#include "acl.h"
+
+static const struct inode_operations v9fs_dir_inode_operations;
+static const struct inode_operations v9fs_dir_inode_operations_dotu;
+static const struct inode_operations v9fs_file_inode_operations;
+static const struct inode_operations v9fs_symlink_inode_operations;
+
+/**
+ * unixmode2p9mode - convert unix mode bits to plan 9
+ * @v9ses: v9fs session information
+ * @mode: mode to convert
+ *
+ */
+
+static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode)
+{
+ int res;
+ res = mode & 0777;
+ if (S_ISDIR(mode))
+ res |= P9_DMDIR;
+ if (v9fs_proto_dotu(v9ses)) {
+ if (v9ses->nodev == 0) {
+ if (S_ISSOCK(mode))
+ res |= P9_DMSOCKET;
+ if (S_ISFIFO(mode))
+ res |= P9_DMNAMEDPIPE;
+ if (S_ISBLK(mode))
+ res |= P9_DMDEVICE;
+ if (S_ISCHR(mode))
+ res |= P9_DMDEVICE;
+ }
+
+ if ((mode & S_ISUID) == S_ISUID)
+ res |= P9_DMSETUID;
+ if ((mode & S_ISGID) == S_ISGID)
+ res |= P9_DMSETGID;
+ if ((mode & S_ISVTX) == S_ISVTX)
+ res |= P9_DMSETVTX;
+ }
+ return res;
+}
+
+/**
+ * p9mode2perm- convert plan9 mode bits to unix permission bits
+ * @v9ses: v9fs session information
+ * @stat: p9_wstat from which mode need to be derived
+ *
+ */
+static int p9mode2perm(struct v9fs_session_info *v9ses,
+ struct p9_wstat *stat)
+{
+ int res;
+ int mode = stat->mode;
+
+ res = mode & S_IALLUGO;
+ if (v9fs_proto_dotu(v9ses)) {
+ if ((mode & P9_DMSETUID) == P9_DMSETUID)
+ res |= S_ISUID;
+
+ if ((mode & P9_DMSETGID) == P9_DMSETGID)
+ res |= S_ISGID;
+
+ if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
+ res |= S_ISVTX;
+ }
+ return res;
+}
+
+/**
+ * p9mode2unixmode- convert plan9 mode bits to unix mode bits
+ * @v9ses: v9fs session information
+ * @stat: p9_wstat from which mode need to be derived
+ * @rdev: major number, minor number in case of device files.
+ *
+ */
+static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses,
+ struct p9_wstat *stat, dev_t *rdev)
+{
+ int res;
+ u32 mode = stat->mode;
+
+ *rdev = 0;
+ res = p9mode2perm(v9ses, stat);
+
+ if ((mode & P9_DMDIR) == P9_DMDIR)
+ res |= S_IFDIR;
+ else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses)))
+ res |= S_IFLNK;
+ else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses))
+ && (v9ses->nodev == 0))
+ res |= S_IFSOCK;
+ else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses))
+ && (v9ses->nodev == 0))
+ res |= S_IFIFO;
+ else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
+ && (v9ses->nodev == 0)) {
+ char type = 0, ext[32];
+ int major = -1, minor = -1;
+
+ strlcpy(ext, stat->extension, sizeof(ext));
+ sscanf(ext, "%c %i %i", &type, &major, &minor);
+ switch (type) {
+ case 'c':
+ res |= S_IFCHR;
+ break;
+ case 'b':
+ res |= S_IFBLK;
+ break;
+ default:
+ p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n",
+ type, stat->extension);
+ };
+ *rdev = MKDEV(major, minor);
+ } else
+ res |= S_IFREG;
+
+ return res;
+}
+
+/**
+ * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits
+ * @uflags: flags to convert
+ * @extended: if .u extensions are active
+ */
+
+int v9fs_uflags2omode(int uflags, int extended)
+{
+ int ret;
+
+ ret = 0;
+ switch (uflags&3) {
+ default:
+ case O_RDONLY:
+ ret = P9_OREAD;
+ break;
+
+ case O_WRONLY:
+ ret = P9_OWRITE;
+ break;
+
+ case O_RDWR:
+ ret = P9_ORDWR;
+ break;
+ }
+
+ if (extended) {
+ if (uflags & O_EXCL)
+ ret |= P9_OEXCL;
+
+ if (uflags & O_APPEND)
+ ret |= P9_OAPPEND;
+ }
+
+ return ret;
+}
+
+/**
+ * v9fs_blank_wstat - helper function to setup a 9P stat structure
+ * @wstat: structure to initialize
+ *
+ */
+
+void
+v9fs_blank_wstat(struct p9_wstat *wstat)
+{
+ wstat->type = ~0;
+ wstat->dev = ~0;
+ wstat->qid.type = ~0;
+ wstat->qid.version = ~0;
+ *((long long *)&wstat->qid.path) = ~0;
+ wstat->mode = ~0;
+ wstat->atime = ~0;
+ wstat->mtime = ~0;
+ wstat->length = ~0;
+ wstat->name = NULL;
+ wstat->uid = NULL;
+ wstat->gid = NULL;
+ wstat->muid = NULL;
+ wstat->n_uid = INVALID_UID;
+ wstat->n_gid = INVALID_GID;
+ wstat->n_muid = INVALID_UID;
+ wstat->extension = NULL;
+}
+
+/**
+ * v9fs_alloc_inode - helper function to allocate an inode
+ *
+ */
+struct inode *v9fs_alloc_inode(struct super_block *sb)
+{
+ struct v9fs_inode *v9inode;
+ v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache,
+ GFP_KERNEL);
+ if (!v9inode)
+ return NULL;
+#ifdef CONFIG_9P_FSCACHE
+ v9inode->fscache = NULL;
+ spin_lock_init(&v9inode->fscache_lock);
+#endif
+ v9inode->writeback_fid = NULL;
+ v9inode->cache_validity = 0;
+ mutex_init(&v9inode->v_mutex);
+ return &v9inode->vfs_inode;
+}
+
+/**
+ * v9fs_destroy_inode - destroy an inode
+ *
+ */
+
+static void v9fs_i_callback(struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ kmem_cache_free(v9fs_inode_cache, V9FS_I(inode));
+}
+
+void v9fs_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, v9fs_i_callback);
+}
+
+int v9fs_init_inode(struct v9fs_session_info *v9ses,
+ struct inode *inode, umode_t mode, dev_t rdev)
+{
+ int err = 0;
+
+ inode_init_owner(inode, NULL, mode);
+ inode->i_blocks = 0;
+ inode->i_rdev = rdev;
+ inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+ inode->i_mapping->a_ops = &v9fs_addr_operations;
+
+ switch (mode & S_IFMT) {
+ case S_IFIFO:
+ case S_IFBLK:
+ case S_IFCHR:
+ case S_IFSOCK:
+ if (v9fs_proto_dotl(v9ses)) {
+ inode->i_op = &v9fs_file_inode_operations_dotl;
+ } else if (v9fs_proto_dotu(v9ses)) {
+ inode->i_op = &v9fs_file_inode_operations;
+ } else {
+ p9_debug(P9_DEBUG_ERROR,
+ "special files without extended mode\n");
+ err = -EINVAL;
+ goto error;
+ }
+ init_special_inode(inode, inode->i_mode, inode->i_rdev);
+ break;
+ case S_IFREG:
+ if (v9fs_proto_dotl(v9ses)) {
+ inode->i_op = &v9fs_file_inode_operations_dotl;
+ if (v9ses->cache == CACHE_LOOSE ||
+ v9ses->cache == CACHE_FSCACHE)
+ inode->i_fop =
+ &v9fs_cached_file_operations_dotl;
+ else if (v9ses->cache == CACHE_MMAP)
+ inode->i_fop = &v9fs_mmap_file_operations_dotl;
+ else
+ inode->i_fop = &v9fs_file_operations_dotl;
+ } else {
+ inode->i_op = &v9fs_file_inode_operations;
+ if (v9ses->cache == CACHE_LOOSE ||
+ v9ses->cache == CACHE_FSCACHE)
+ inode->i_fop =
+ &v9fs_cached_file_operations;
+ else if (v9ses->cache == CACHE_MMAP)
+ inode->i_fop = &v9fs_mmap_file_operations;
+ else
+ inode->i_fop = &v9fs_file_operations;
+ }
+
+ break;
+ case S_IFLNK:
+ if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) {
+ p9_debug(P9_DEBUG_ERROR,
+ "extended modes used with legacy protocol\n");
+ err = -EINVAL;
+ goto error;
+ }
+
+ if (v9fs_proto_dotl(v9ses))
+ inode->i_op = &v9fs_symlink_inode_operations_dotl;
+ else
+ inode->i_op = &v9fs_symlink_inode_operations;
+
+ break;
+ case S_IFDIR:
+ inc_nlink(inode);
+ if (v9fs_proto_dotl(v9ses))
+ inode->i_op = &v9fs_dir_inode_operations_dotl;
+ else if (v9fs_proto_dotu(v9ses))
+ inode->i_op = &v9fs_dir_inode_operations_dotu;
+ else
+ inode->i_op = &v9fs_dir_inode_operations;
+
+ if (v9fs_proto_dotl(v9ses))
+ inode->i_fop = &v9fs_dir_operations_dotl;
+ else
+ inode->i_fop = &v9fs_dir_operations;
+
+ break;
+ default:
+ p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n",
+ mode, mode & S_IFMT);
+ err = -EINVAL;
+ goto error;
+ }
+error:
+ return err;
+
+}
+
+/**
+ * v9fs_get_inode - helper function to setup an inode
+ * @sb: superblock
+ * @mode: mode to setup inode with
+ *
+ */
+
+struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev)
+{
+ int err;
+ struct inode *inode;
+ struct v9fs_session_info *v9ses = sb->s_fs_info;
+
+ p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode);
+
+ inode = new_inode(sb);
+ if (!inode) {
+ pr_warn("%s (%d): Problem allocating inode\n",
+ __func__, task_pid_nr(current));
+ return ERR_PTR(-ENOMEM);
+ }
+ err = v9fs_init_inode(v9ses, inode, mode, rdev);
+ if (err) {
+ iput(inode);
+ return ERR_PTR(err);
+ }
+ return inode;
+}
+
+/*
+static struct v9fs_fid*
+v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
+{
+ int err;
+ int nfid;
+ struct v9fs_fid *ret;
+ struct v9fs_fcall *fcall;
+
+ nfid = v9fs_get_idpool(&v9ses->fidpool);
+ if (nfid < 0) {
+ eprintk(KERN_WARNING, "no free fids available\n");
+ return ERR_PTR(-ENOSPC);
+ }
+
+ err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
+ &fcall);
+
+ if (err < 0) {
+ if (fcall && fcall->id == RWALK)
+ goto clunk_fid;
+
+ PRINT_FCALL_ERROR("walk error", fcall);
+ v9fs_put_idpool(nfid, &v9ses->fidpool);
+ goto error;
+ }
+
+ kfree(fcall);
+ fcall = NULL;
+ ret = v9fs_fid_create(v9ses, nfid);
+ if (!ret) {
+ err = -ENOMEM;
+ goto clunk_fid;
+ }
+
+ err = v9fs_fid_insert(ret, dentry);
+ if (err < 0) {
+ v9fs_fid_destroy(ret);
+ goto clunk_fid;
+ }
+
+ return ret;
+
+clunk_fid:
+ v9fs_t_clunk(v9ses, nfid);
+
+error:
+ kfree(fcall);
+ return ERR_PTR(err);
+}
+*/
+
+
+/**
+ * v9fs_clear_inode - release an inode
+ * @inode: inode to release
+ *
+ */
+void v9fs_evict_inode(struct inode *inode)
+{
+ struct v9fs_inode *v9inode = V9FS_I(inode);
+
+ truncate_inode_pages_final(inode->i_mapping);
+ clear_inode(inode);
+ filemap_fdatawrite(inode->i_mapping);
+
+ v9fs_cache_inode_put_cookie(inode);
+ /* clunk the fid stashed in writeback_fid */
+ if (v9inode->writeback_fid) {
+ p9_client_clunk(v9inode->writeback_fid);
+ v9inode->writeback_fid = NULL;
+ }
+}
+
+static int v9fs_test_inode(struct inode *inode, void *data)
+{
+ int umode;
+ dev_t rdev;
+ struct v9fs_inode *v9inode = V9FS_I(inode);
+ struct p9_wstat *st = (struct p9_wstat *)data;
+ struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
+
+ umode = p9mode2unixmode(v9ses, st, &rdev);
+ /* don't match inode of different type */
+ if ((inode->i_mode & S_IFMT) != (umode & S_IFMT))
+ return 0;
+
+ /* compare qid details */
+ if (memcmp(&v9inode->qid.version,
+ &st->qid.version, sizeof(v9inode->qid.version)))
+ return 0;
+
+ if (v9inode->qid.type != st->qid.type)
+ return 0;
+ return 1;
+}
+
+static int v9fs_test_new_inode(struct inode *inode, void *data)
+{
+ return 0;
+}
+
+static int v9fs_set_inode(struct inode *inode, void *data)
+{
+ struct v9fs_inode *v9inode = V9FS_I(inode);
+ struct p9_wstat *st = (struct p9_wstat *)data;
+
+ memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
+ return 0;
+}
+
+static struct inode *v9fs_qid_iget(struct super_block *sb,
+ struct p9_qid *qid,
+ struct p9_wstat *st,
+ int new)
+{
+ dev_t rdev;
+ int retval;
+ umode_t umode;
+ unsigned long i_ino;
+ struct inode *inode;
+ struct v9fs_session_info *v9ses = sb->s_fs_info;
+ int (*test)(struct inode *, void *);
+
+ if (new)
+ test = v9fs_test_new_inode;
+ else
+ test = v9fs_test_inode;
+
+ i_ino = v9fs_qid2ino(qid);
+ inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ if (!(inode->i_state & I_NEW))
+ return inode;
+ /*
+ * initialize the inode with the stat info
+ * FIXME!! we may need support for stale inodes
+ * later.
+ */
+ inode->i_ino = i_ino;
+ umode = p9mode2unixmode(v9ses, st, &rdev);
+ retval = v9fs_init_inode(v9ses, inode, umode, rdev);
+ if (retval)
+ goto error;
+
+ v9fs_stat2inode(st, inode, sb);
+ v9fs_cache_inode_get_cookie(inode);
+ unlock_new_inode(inode);
+ return inode;
+error:
+ unlock_new_inode(inode);
+ iput(inode);
+ return ERR_PTR(retval);
+
+}
+
+struct inode *
+v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
+ struct super_block *sb, int new)
+{
+ struct p9_wstat *st;
+ struct inode *inode = NULL;
+
+ st = p9_client_stat(fid);
+ if (IS_ERR(st))
+ return ERR_CAST(st);
+
+ inode = v9fs_qid_iget(sb, &st->qid, st, new);
+ p9stat_free(st);
+ kfree(st);
+ return inode;
+}
+
+/**
+ * v9fs_at_to_dotl_flags- convert Linux specific AT flags to
+ * plan 9 AT flag.
+ * @flags: flags to convert
+ */
+static int v9fs_at_to_dotl_flags(int flags)
+{
+ int rflags = 0;
+ if (flags & AT_REMOVEDIR)
+ rflags |= P9_DOTL_AT_REMOVEDIR;
+ return rflags;
+}
+
+/**
+ * v9fs_remove - helper function to remove files and directories
+ * @dir: directory inode that is being deleted
+ * @dentry: dentry that is being deleted
+ * @flags: removing a directory
+ *
+ */
+
+static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags)
+{
+ struct inode *inode;
+ int retval = -EOPNOTSUPP;
+ struct p9_fid *v9fid, *dfid;
+ struct v9fs_session_info *v9ses;
+
+ p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n",
+ dir, dentry, flags);
+
+ v9ses = v9fs_inode2v9ses(dir);
+ inode = d_inode(dentry);
+ dfid = v9fs_fid_lookup(dentry->d_parent);
+ if (IS_ERR(dfid)) {
+ retval = PTR_ERR(dfid);
+ p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval);
+ return retval;
+ }
+ if (v9fs_proto_dotl(v9ses))
+ retval = p9_client_unlinkat(dfid, dentry->d_name.name,
+ v9fs_at_to_dotl_flags(flags));
+ if (retval == -EOPNOTSUPP) {
+ /* Try the one based on path */
+ v9fid = v9fs_fid_clone(dentry);
+ if (IS_ERR(v9fid))
+ return PTR_ERR(v9fid);
+ retval = p9_client_remove(v9fid);
+ }
+ if (!retval) {
+ /*
+ * directories on unlink should have zero
+ * link count
+ */
+ if (flags & AT_REMOVEDIR) {
+ clear_nlink(inode);
+ drop_nlink(dir);
+ } else
+ drop_nlink(inode);
+
+ v9fs_invalidate_inode_attr(inode);
+ v9fs_invalidate_inode_attr(dir);
+ }
+ return retval;
+}
+
+/**
+ * v9fs_create - Create a file
+ * @v9ses: session information
+ * @dir: directory that dentry is being created in
+ * @dentry: dentry that is being created
+ * @extension: 9p2000.u extension string to support devices, etc.
+ * @perm: create permissions
+ * @mode: open mode
+ *
+ */
+static struct p9_fid *
+v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
+ struct dentry *dentry, char *extension, u32 perm, u8 mode)
+{
+ int err;
+ char *name;
+ struct p9_fid *dfid, *ofid, *fid;
+ struct inode *inode;
+
+ p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
+
+ err = 0;
+ ofid = NULL;
+ fid = NULL;
+ name = (char *) dentry->d_name.name;
+ 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_PTR(err);
+ }
+
+ /* 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);
+ return ERR_PTR(err);
+ }
+
+ err = p9_client_fcreate(ofid, name, perm, mode, extension);
+ if (err < 0) {
+ p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
+ goto error;
+ }
+
+ if (!(perm & P9_DMLINK)) {
+ /* now walk from the parent so we can get 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 the 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);
+ }
+ return ofid;
+error:
+ if (ofid)
+ p9_client_clunk(ofid);
+
+ if (fid)
+ p9_client_clunk(fid);
+
+ return ERR_PTR(err);
+}
+
+/**
+ * v9fs_vfs_create - VFS hook to create a regular file
+ *
+ * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called
+ * for mknod(2).
+ *
+ * @dir: directory inode that is being created
+ * @dentry: dentry that is being deleted
+ * @mode: create permissions
+ *
+ */
+
+static int
+v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ bool excl)
+{
+ struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
+ u32 perm = unixmode2p9mode(v9ses, mode);
+ struct p9_fid *fid;
+
+ /* P9_OEXCL? */
+ fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR);
+ if (IS_ERR(fid))
+ return PTR_ERR(fid);
+
+ v9fs_invalidate_inode_attr(dir);
+ p9_client_clunk(fid);
+
+ return 0;
+}
+
+/**
+ * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
+ * @dir: inode that is being unlinked
+ * @dentry: dentry that is being unlinked
+ * @mode: mode for new directory
+ *
+ */
+
+static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ int err;
+ u32 perm;
+ struct p9_fid *fid;
+ struct v9fs_session_info *v9ses;
+
+ p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
+ err = 0;
+ v9ses = v9fs_inode2v9ses(dir);
+ perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
+ fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
+ if (IS_ERR(fid)) {
+ err = PTR_ERR(fid);
+ fid = NULL;
+ } else {
+ inc_nlink(dir);
+ v9fs_invalidate_inode_attr(dir);
+ }
+
+ if (fid)
+ p9_client_clunk(fid);
+
+ return err;
+}
+
+/**
+ * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
+ * @dir: inode that is being walked from
+ * @dentry: dentry that is being walked to?
+ * @flags: lookup flags (unused)
+ *
+ */
+
+struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
+ unsigned int flags)
+{
+ struct dentry *res;
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *dfid, *fid;
+ struct inode *inode;
+ char *name;
+
+ p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%pd) %p flags: %x\n",
+ dir, dentry, dentry, flags);
+
+ if (dentry->d_name.len > NAME_MAX)
+ return ERR_PTR(-ENAMETOOLONG);
+
+ v9ses = v9fs_inode2v9ses(dir);
+ /* We can walk d_parent because we hold the dir->i_mutex */
+ dfid = v9fs_fid_lookup(dentry->d_parent);
+ if (IS_ERR(dfid))
+ return ERR_CAST(dfid);
+
+ name = (char *) dentry->d_name.name;
+ fid = p9_client_walk(dfid, 1, &name, 1);
+ if (IS_ERR(fid)) {
+ if (fid == ERR_PTR(-ENOENT)) {
+ d_add(dentry, NULL);
+ return NULL;
+ }
+ return ERR_CAST(fid);
+ }
+ /*
+ * Make sure we don't use a wrong inode due to parallel
+ * unlink. For cached mode create calls request for new
+ * inode. But with cache disabled, lookup should do this.
+ */
+ if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
+ inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb);
+ else
+ inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
+ if (IS_ERR(inode)) {
+ p9_client_clunk(fid);
+ return ERR_CAST(inode);
+ }
+ /*
+ * If we had a rename on the server and a parallel lookup
+ * for the new name, then make sure we instantiate with
+ * the new name. ie look up for a/b, while on server somebody
+ * moved b under k and client parallely did a lookup for
+ * k/b.
+ */
+ res = d_splice_alias(inode, dentry);
+ if (!res)
+ v9fs_fid_add(dentry, fid);
+ else if (!IS_ERR(res))
+ v9fs_fid_add(res, fid);
+ else
+ p9_client_clunk(fid);
+ return res;
+}
+
+static int
+v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
+ struct file *file, unsigned flags, umode_t mode,
+ int *opened)
+{
+ int err;
+ u32 perm;
+ struct v9fs_inode *v9inode;
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *fid, *inode_fid;
+ struct dentry *res = NULL;
+
+ if (d_unhashed(dentry)) {
+ res = v9fs_vfs_lookup(dir, dentry, 0);
+ if (IS_ERR(res))
+ return PTR_ERR(res);
+
+ if (res)
+ dentry = res;
+ }
+
+ /* Only creates */
+ if (!(flags & O_CREAT) || d_really_is_positive(dentry))
+ return finish_no_open(file, res);
+
+ err = 0;
+
+ v9ses = v9fs_inode2v9ses(dir);
+ perm = unixmode2p9mode(v9ses, mode);
+ fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
+ v9fs_uflags2omode(flags,
+ v9fs_proto_dotu(v9ses)));
+ if (IS_ERR(fid)) {
+ err = PTR_ERR(fid);
+ fid = NULL;
+ goto error;
+ }
+
+ v9fs_invalidate_inode_attr(dir);
+ v9inode = V9FS_I(d_inode(dentry));
+ 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 error;
+ }
+ v9inode->writeback_fid = (void *) inode_fid;
+ }
+ mutex_unlock(&v9inode->v_mutex);
+ err = finish_open(file, dentry, generic_file_open, opened);
+ if (err)
+ goto error;
+
+ file->private_data = fid;
+ if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
+ v9fs_cache_inode_set_cookie(d_inode(dentry), file);
+
+ *opened |= FILE_CREATED;
+out:
+ dput(res);
+ return err;
+
+error:
+ if (fid)
+ p9_client_clunk(fid);
+ goto out;
+}
+
+/**
+ * v9fs_vfs_unlink - VFS unlink hook to delete an inode
+ * @i: inode that is being unlinked
+ * @d: dentry that is being unlinked
+ *
+ */
+
+int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
+{
+ return v9fs_remove(i, d, 0);
+}
+
+/**
+ * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
+ * @i: inode that is being unlinked
+ * @d: dentry that is being unlinked
+ *
+ */
+
+int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
+{
+ return v9fs_remove(i, d, AT_REMOVEDIR);
+}
+
+/**
+ * v9fs_vfs_rename - VFS hook to rename an inode
+ * @old_dir: old dir inode
+ * @old_dentry: old dentry
+ * @new_dir: new dir inode
+ * @new_dentry: new dentry
+ *
+ */
+
+int
+v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ int retval;
+ struct inode *old_inode;
+ struct inode *new_inode;
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *oldfid;
+ struct p9_fid *olddirfid;
+ struct p9_fid *newdirfid;
+ struct p9_wstat wstat;
+
+ p9_debug(P9_DEBUG_VFS, "\n");
+ retval = 0;
+ old_inode = d_inode(old_dentry);
+ new_inode = d_inode(new_dentry);
+ v9ses = v9fs_inode2v9ses(old_inode);
+ oldfid = v9fs_fid_lookup(old_dentry);
+ if (IS_ERR(oldfid))
+ return PTR_ERR(oldfid);
+
+ olddirfid = v9fs_fid_clone(old_dentry->d_parent);
+ if (IS_ERR(olddirfid)) {
+ retval = PTR_ERR(olddirfid);
+ goto done;
+ }
+
+ newdirfid = v9fs_fid_clone(new_dentry->d_parent);
+ if (IS_ERR(newdirfid)) {
+ retval = PTR_ERR(newdirfid);
+ goto clunk_olddir;
+ }
+
+ down_write(&v9ses->rename_sem);
+ if (v9fs_proto_dotl(v9ses)) {
+ retval = p9_client_renameat(olddirfid, old_dentry->d_name.name,
+ newdirfid, new_dentry->d_name.name);
+ if (retval == -EOPNOTSUPP)
+ retval = p9_client_rename(oldfid, newdirfid,
+ new_dentry->d_name.name);
+ if (retval != -EOPNOTSUPP)
+ goto clunk_newdir;
+ }
+ if (old_dentry->d_parent != new_dentry->d_parent) {
+ /*
+ * 9P .u can only handle file rename in the same directory
+ */
+
+ p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n");
+ retval = -EXDEV;
+ goto clunk_newdir;
+ }
+ v9fs_blank_wstat(&wstat);
+ wstat.muid = v9ses->uname;
+ wstat.name = (char *) new_dentry->d_name.name;
+ retval = p9_client_wstat(oldfid, &wstat);
+
+clunk_newdir:
+ if (!retval) {
+ if (new_inode) {
+ if (S_ISDIR(new_inode->i_mode))
+ clear_nlink(new_inode);
+ else
+ drop_nlink(new_inode);
+ }
+ if (S_ISDIR(old_inode->i_mode)) {
+ if (!new_inode)
+ inc_nlink(new_dir);
+ drop_nlink(old_dir);
+ }
+ v9fs_invalidate_inode_attr(old_inode);
+ v9fs_invalidate_inode_attr(old_dir);
+ v9fs_invalidate_inode_attr(new_dir);
+
+ /* successful rename */
+ d_move(old_dentry, new_dentry);
+ }
+ up_write(&v9ses->rename_sem);
+ p9_client_clunk(newdirfid);
+
+clunk_olddir:
+ p9_client_clunk(olddirfid);
+
+done:
+ return retval;
+}
+
+/**
+ * v9fs_vfs_getattr - retrieve file metadata
+ * @mnt: mount information
+ * @dentry: file to get attributes on
+ * @stat: metadata structure to populate
+ *
+ */
+
+static int
+v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat)
+{
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *fid;
+ struct p9_wstat *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);
+
+ st = p9_client_stat(fid);
+ if (IS_ERR(st))
+ return PTR_ERR(st);
+
+ v9fs_stat2inode(st, d_inode(dentry), d_inode(dentry)->i_sb);
+ generic_fillattr(d_inode(dentry), stat);
+
+ p9stat_free(st);
+ kfree(st);
+ return 0;
+}
+
+/**
+ * v9fs_vfs_setattr - set file metadata
+ * @dentry: file whose metadata to set
+ * @iattr: metadata assignment structure
+ *
+ */
+
+static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
+{
+ int retval;
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *fid;
+ struct p9_wstat wstat;
+
+ p9_debug(P9_DEBUG_VFS, "\n");
+ retval = inode_change_ok(d_inode(dentry), iattr);
+ if (retval)
+ return retval;
+
+ retval = -EPERM;
+ v9ses = v9fs_dentry2v9ses(dentry);
+ fid = v9fs_fid_lookup(dentry);
+ if(IS_ERR(fid))
+ return PTR_ERR(fid);
+
+ v9fs_blank_wstat(&wstat);
+ if (iattr->ia_valid & ATTR_MODE)
+ wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
+
+ if (iattr->ia_valid & ATTR_MTIME)
+ wstat.mtime = iattr->ia_mtime.tv_sec;
+
+ if (iattr->ia_valid & ATTR_ATIME)
+ wstat.atime = iattr->ia_atime.tv_sec;
+
+ if (iattr->ia_valid & ATTR_SIZE)
+ wstat.length = iattr->ia_size;
+
+ if (v9fs_proto_dotu(v9ses)) {
+ if (iattr->ia_valid & ATTR_UID)
+ wstat.n_uid = iattr->ia_uid;
+
+ if (iattr->ia_valid & ATTR_GID)
+ wstat.n_gid = iattr->ia_gid;
+ }
+
+ /* Write all dirty data */
+ if (d_is_reg(dentry))
+ filemap_write_and_wait(d_inode(dentry)->i_mapping);
+
+ retval = p9_client_wstat(fid, &wstat);
+ if (retval < 0)
+ return retval;
+
+ if ((iattr->ia_valid & ATTR_SIZE) &&
+ iattr->ia_size != i_size_read(d_inode(dentry)))
+ truncate_setsize(d_inode(dentry), iattr->ia_size);
+
+ v9fs_invalidate_inode_attr(d_inode(dentry));
+
+ setattr_copy(d_inode(dentry), iattr);
+ mark_inode_dirty(d_inode(dentry));
+ return 0;
+}
+
+/**
+ * v9fs_stat2inode - populate an inode structure with mistat info
+ * @stat: Plan 9 metadata (mistat) structure
+ * @inode: inode to populate
+ * @sb: superblock of filesystem
+ *
+ */
+
+void
+v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
+ struct super_block *sb)
+{
+ umode_t mode;
+ char ext[32];
+ char tag_name[14];
+ unsigned int i_nlink;
+ struct v9fs_session_info *v9ses = sb->s_fs_info;
+ struct v9fs_inode *v9inode = V9FS_I(inode);
+
+ set_nlink(inode, 1);
+
+ inode->i_atime.tv_sec = stat->atime;
+ inode->i_mtime.tv_sec = stat->mtime;
+ inode->i_ctime.tv_sec = stat->mtime;
+
+ inode->i_uid = v9ses->dfltuid;
+ inode->i_gid = v9ses->dfltgid;
+
+ if (v9fs_proto_dotu(v9ses)) {
+ inode->i_uid = stat->n_uid;
+ inode->i_gid = stat->n_gid;
+ }
+ if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) {
+ if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) {
+ /*
+ * Hadlink support got added later to
+ * to the .u extension. So there can be
+ * server out there that doesn't support
+ * this even with .u extension. So check
+ * for non NULL stat->extension
+ */
+ strlcpy(ext, stat->extension, sizeof(ext));
+ /* HARDLINKCOUNT %u */
+ sscanf(ext, "%13s %u", tag_name, &i_nlink);
+ if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
+ set_nlink(inode, i_nlink);
+ }
+ }
+ mode = p9mode2perm(v9ses, stat);
+ mode |= inode->i_mode & ~S_IALLUGO;
+ inode->i_mode = mode;
+ i_size_write(inode, stat->length);
+
+ /* not real number of blocks, but 512 byte ones ... */
+ inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
+ v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
+}
+
+/**
+ * v9fs_qid2ino - convert qid into inode number
+ * @qid: qid to hash
+ *
+ * BUG: potential for inode number collisions?
+ */
+
+ino_t v9fs_qid2ino(struct p9_qid *qid)
+{
+ u64 path = qid->path + 2;
+ ino_t i = 0;
+
+ if (sizeof(ino_t) == sizeof(path))
+ memcpy(&i, &path, sizeof(ino_t));
+ else
+ i = (ino_t) (path ^ (path >> 32));
+
+ return i;
+}
+
+/**
+ * v9fs_readlink - read a symlink's location (internal version)
+ * @dentry: dentry for symlink
+ * @buffer: buffer to load symlink location into
+ * @buflen: length of buffer
+ *
+ */
+
+static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
+{
+ int retval;
+
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *fid;
+ struct p9_wstat *st;
+
+ p9_debug(P9_DEBUG_VFS, " %pd\n", dentry);
+ retval = -EPERM;
+ v9ses = v9fs_dentry2v9ses(dentry);
+ fid = v9fs_fid_lookup(dentry);
+ if (IS_ERR(fid))
+ return PTR_ERR(fid);
+
+ if (!v9fs_proto_dotu(v9ses))
+ return -EBADF;
+
+ st = p9_client_stat(fid);
+ if (IS_ERR(st))
+ return PTR_ERR(st);
+
+ if (!(st->mode & P9_DMSYMLINK)) {
+ retval = -EINVAL;
+ goto done;
+ }
+
+ /* copy extension buffer into buffer */
+ retval = min(strlen(st->extension)+1, (size_t)buflen);
+ memcpy(buffer, st->extension, retval);
+
+ p9_debug(P9_DEBUG_VFS, "%pd -> %s (%.*s)\n",
+ dentry, st->extension, buflen, buffer);
+
+done:
+ p9stat_free(st);
+ kfree(st);
+ return retval;
+}
+
+/**
+ * v9fs_vfs_follow_link - follow a symlink path
+ * @dentry: dentry for symlink
+ * @nd: nameidata
+ *
+ */
+
+static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ int len = 0;
+ char *link = __getname();
+
+ p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
+
+ if (!link)
+ link = ERR_PTR(-ENOMEM);
+ else {
+ len = v9fs_readlink(dentry, link, PATH_MAX);
+
+ if (len < 0) {
+ __putname(link);
+ link = ERR_PTR(len);
+ } else
+ link[min(len, PATH_MAX-1)] = 0;
+ }
+ nd_set_link(nd, link);
+
+ return NULL;
+}
+
+/**
+ * v9fs_vfs_put_link - release a symlink path
+ * @dentry: dentry for symlink
+ * @nd: nameidata
+ * @p: unused
+ *
+ */
+
+void
+v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
+{
+ char *s = nd_get_link(nd);
+
+ p9_debug(P9_DEBUG_VFS, " %pd %s\n",
+ dentry, IS_ERR(s) ? "<error>" : s);
+ if (!IS_ERR(s))
+ __putname(s);
+}
+
+/**
+ * v9fs_vfs_mkspecial - create a special file
+ * @dir: inode to create special file in
+ * @dentry: dentry to create
+ * @perm: mode to create special file
+ * @extension: 9p2000.u format extension string representing special file
+ *
+ */
+
+static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
+ u32 perm, const char *extension)
+{
+ struct p9_fid *fid;
+ struct v9fs_session_info *v9ses;
+
+ v9ses = v9fs_inode2v9ses(dir);
+ if (!v9fs_proto_dotu(v9ses)) {
+ p9_debug(P9_DEBUG_ERROR, "not extended\n");
+ return -EPERM;
+ }
+
+ fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
+ P9_OREAD);
+ if (IS_ERR(fid))
+ return PTR_ERR(fid);
+
+ v9fs_invalidate_inode_attr(dir);
+ p9_client_clunk(fid);
+ return 0;
+}
+
+/**
+ * v9fs_vfs_symlink - helper function to create symlinks
+ * @dir: directory inode containing symlink
+ * @dentry: dentry for symlink
+ * @symname: symlink data
+ *
+ * See Also: 9P2000.u RFC for more information
+ *
+ */
+
+static int
+v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
+{
+ p9_debug(P9_DEBUG_VFS, " %lu,%pd,%s\n",
+ dir->i_ino, dentry, symname);
+
+ return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname);
+}
+
+/**
+ * v9fs_vfs_link - create a hardlink
+ * @old_dentry: dentry for file to link to
+ * @dir: inode destination for new link
+ * @dentry: dentry for link
+ *
+ */
+
+static int
+v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
+ struct dentry *dentry)
+{
+ int retval;
+ char *name;
+ struct p9_fid *oldfid;
+
+ p9_debug(P9_DEBUG_VFS, " %lu,%pd,%pd\n",
+ dir->i_ino, dentry, old_dentry);
+
+ oldfid = v9fs_fid_clone(old_dentry);
+ if (IS_ERR(oldfid))
+ return PTR_ERR(oldfid);
+
+ name = __getname();
+ if (unlikely(!name)) {
+ retval = -ENOMEM;
+ goto clunk_fid;
+ }
+
+ sprintf(name, "%d\n", oldfid->fid);
+ retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
+ __putname(name);
+ if (!retval) {
+ v9fs_refresh_inode(oldfid, d_inode(old_dentry));
+ v9fs_invalidate_inode_attr(dir);
+ }
+clunk_fid:
+ p9_client_clunk(oldfid);
+ return retval;
+}
+
+/**
+ * v9fs_vfs_mknod - 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(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
+{
+ struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
+ int retval;
+ char *name;
+ u32 perm;
+
+ p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n",
+ dir->i_ino, dentry, mode,
+ MAJOR(rdev), MINOR(rdev));
+
+ if (!new_valid_dev(rdev))
+ return -EINVAL;
+
+ name = __getname();
+ if (!name)
+ return -ENOMEM;
+ /* build extension */
+ if (S_ISBLK(mode))
+ sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
+ else if (S_ISCHR(mode))
+ sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
+ else if (S_ISFIFO(mode))
+ *name = 0;
+ else if (S_ISSOCK(mode))
+ *name = 0;
+ else {
+ __putname(name);
+ return -EINVAL;
+ }
+
+ perm = unixmode2p9mode(v9ses, mode);
+ retval = v9fs_vfs_mkspecial(dir, dentry, perm, name);
+ __putname(name);
+
+ return retval;
+}
+
+int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode)
+{
+ int umode;
+ dev_t rdev;
+ loff_t i_size;
+ struct p9_wstat *st;
+ struct v9fs_session_info *v9ses;
+
+ v9ses = v9fs_inode2v9ses(inode);
+ st = p9_client_stat(fid);
+ if (IS_ERR(st))
+ return PTR_ERR(st);
+ /*
+ * Don't update inode if the file type is different
+ */
+ umode = p9mode2unixmode(v9ses, st, &rdev);
+ if ((inode->i_mode & S_IFMT) != (umode & S_IFMT))
+ goto out;
+
+ spin_lock(&inode->i_lock);
+ /*
+ * We don't want to refresh inode->i_size,
+ * because we may have cached data
+ */
+ i_size = inode->i_size;
+ v9fs_stat2inode(st, inode, inode->i_sb);
+ if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
+ inode->i_size = i_size;
+ spin_unlock(&inode->i_lock);
+out:
+ p9stat_free(st);
+ kfree(st);
+ return 0;
+}
+
+static const struct inode_operations v9fs_dir_inode_operations_dotu = {
+ .create = v9fs_vfs_create,
+ .lookup = v9fs_vfs_lookup,
+ .atomic_open = v9fs_vfs_atomic_open,
+ .symlink = v9fs_vfs_symlink,
+ .link = v9fs_vfs_link,
+ .unlink = v9fs_vfs_unlink,
+ .mkdir = v9fs_vfs_mkdir,
+ .rmdir = v9fs_vfs_rmdir,
+ .mknod = v9fs_vfs_mknod,
+ .rename = v9fs_vfs_rename,
+ .getattr = v9fs_vfs_getattr,
+ .setattr = v9fs_vfs_setattr,
+};
+
+static const struct inode_operations v9fs_dir_inode_operations = {
+ .create = v9fs_vfs_create,
+ .lookup = v9fs_vfs_lookup,
+ .atomic_open = v9fs_vfs_atomic_open,
+ .unlink = v9fs_vfs_unlink,
+ .mkdir = v9fs_vfs_mkdir,
+ .rmdir = v9fs_vfs_rmdir,
+ .mknod = v9fs_vfs_mknod,
+ .rename = v9fs_vfs_rename,
+ .getattr = v9fs_vfs_getattr,
+ .setattr = v9fs_vfs_setattr,
+};
+
+static const struct inode_operations v9fs_file_inode_operations = {
+ .getattr = v9fs_vfs_getattr,
+ .setattr = v9fs_vfs_setattr,
+};
+
+static const struct inode_operations v9fs_symlink_inode_operations = {
+ .readlink = generic_readlink,
+ .follow_link = v9fs_vfs_follow_link,
+ .put_link = v9fs_vfs_put_link,
+ .getattr = v9fs_vfs_getattr,
+ .setattr = v9fs_vfs_setattr,
+};
+
Code Review / kvmfornfv.git / blobdiff