Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
  isofs: Fix lseek() to position beyond 4 GB
  vfs: remove unused MNT_STRICTATIME
  vfs: show unreachable paths in getcwd and proc
  vfs: only add " (deleted)" where necessary
  vfs: add prepend_path() helper
  vfs: __d_path: dont prepend the name of the root dentry
  ia64: perfmon: add d_dname method
  vfs: add helpers to get root and pwd
  cachefiles: use path_get instead of lone dget
  fs/sysv/super.c: add support for non-PDP11 v7 filesystems
  V7: Adjust sanity checks for some volumes
  Add v7 alias
  v9fs: fixup for inode_setattr being removed

Manual merge to take Al's version of the fs/sysv/super.c file: it merged
cleanly, but Al had removed an unnecessary header include, so his side
was better.

Author: torvalds

arch/ia64/kernel/perfmon.c

@@ -2191,8 +2191,15 @@ pfmfs_delete_dentry(struct dentry *dentry)
 	return 1;
 }
 
+static char *pfmfs_dname(struct dentry *dentry, char *buffer, int buflen)
+{
+	return dynamic_dname(dentry, buffer, buflen, "pfm:[%lu]",
+			     dentry->d_inode->i_ino);
+}
+
 static const struct dentry_operations pfmfs_dentry_operations = {
 	.d_delete = pfmfs_delete_dentry,
+	.d_dname = pfmfs_dname,
 };
 
 
@@ -2202,8 +2209,7 @@ pfm_alloc_file(pfm_context_t *ctx)
 	struct file *file;
 	struct inode *inode;
 	struct path path;
-	char name[32];
-	struct qstr this;
+	struct qstr this = { .name = "" };
 
 	/*
 	 * allocate a new inode
@@ -2218,11 +2224,6 @@ pfm_alloc_file(pfm_context_t *ctx)
 	inode->i_uid  = current_fsuid();
 	inode->i_gid  = current_fsgid();
 
-	sprintf(name, "[%lu]", inode->i_ino);
-	this.name = name;
-	this.len  = strlen(name);
-	this.hash = inode->i_ino;
-
 	/*
 	 * allocate a new dcache entry
 	 */

fs/9p/vfs_inode.c

@@ -1263,10 +1263,19 @@ static int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
 		return PTR_ERR(fid);
 
 	retval = p9_client_setattr(fid, &p9attr);
-	if (retval >= 0)
-		retval = inode_setattr(dentry->d_inode, iattr);
+	if (retval < 0)
+		return retval;
 
-	return retval;
+	if ((iattr->ia_valid & ATTR_SIZE) &&
+	    iattr->ia_size != i_size_read(dentry->d_inode)) {
+		retval = vmtruncate(dentry->d_inode, iattr->ia_size);
+		if (retval)
+			return retval;
+	}
+
+	setattr_copy(dentry->d_inode, iattr);
+	mark_inode_dirty(dentry->d_inode);
+	return 0;
 }
 
 /**

fs/cachefiles/daemon.c

@@ -552,8 +552,7 @@ static int cachefiles_daemon_tag(struct cachefiles_cache *cache, char *args)
  */
 static int cachefiles_daemon_cull(struct cachefiles_cache *cache, char *args)
 {
-	struct fs_struct *fs;
-	struct dentry *dir;
+	struct path path;
 	const struct cred *saved_cred;
 	int ret;
 
@@ -573,24 +572,21 @@ static int cachefiles_daemon_cull(struct cachefiles_cache *cache, char *args)
 	}
 
 	/* extract the directory dentry from the cwd */
-	fs = current->fs;
-	read_lock(&fs->lock);
-	dir = dget(fs->pwd.dentry);
-	read_unlock(&fs->lock);
+	get_fs_pwd(current->fs, &path);
 
-	if (!S_ISDIR(dir->d_inode->i_mode))
+	if (!S_ISDIR(path.dentry->d_inode->i_mode))
 		goto notdir;
 
 	cachefiles_begin_secure(cache, &saved_cred);
-	ret = cachefiles_cull(cache, dir, args);
+	ret = cachefiles_cull(cache, path.dentry, args);
 	cachefiles_end_secure(cache, saved_cred);
 
-	dput(dir);
+	path_put(&path);
 	_leave(" = %d", ret);
 	return ret;
 
 notdir:
-	dput(dir);
+	path_put(&path);
 	kerror("cull command requires dirfd to be a directory");
 	return -ENOTDIR;
 
@@ -628,8 +624,7 @@ static int cachefiles_daemon_debug(struct cachefiles_cache *cache, char *args)
  */
 static int cachefiles_daemon_inuse(struct cachefiles_cache *cache, char *args)
 {
-	struct fs_struct *fs;
-	struct dentry *dir;
+	struct path path;
 	const struct cred *saved_cred;
 	int ret;
 
@@ -649,24 +644,21 @@ static int cachefiles_daemon_inuse(struct cachefiles_cache *cache, char *args)
 	}
 
 	/* extract the directory dentry from the cwd */
-	fs = current->fs;
-	read_lock(&fs->lock);
-	dir = dget(fs->pwd.dentry);
-	read_unlock(&fs->lock);
+	get_fs_pwd(current->fs, &path);
 
-	if (!S_ISDIR(dir->d_inode->i_mode))
+	if (!S_ISDIR(path.dentry->d_inode->i_mode))
 		goto notdir;
 
 	cachefiles_begin_secure(cache, &saved_cred);
-	ret = cachefiles_check_in_use(cache, dir, args);
+	ret = cachefiles_check_in_use(cache, path.dentry, args);
 	cachefiles_end_secure(cache, saved_cred);
 
-	dput(dir);
+	path_put(&path);
 	//_leave(" = %d", ret);
 	return ret;
 
 notdir:
-	dput(dir);
+	path_put(&path);
 	kerror("inuse command requires dirfd to be a directory");
 	return -ENOTDIR;