blob: 53687bbf2296f8b799583786b16b59a574369f9e [file] [log] [blame]
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -06001/*
2 * linux/fs/9p/vfs_inode_dotl.c
3 *
4 * This file contains vfs inode ops for the 9P2000.L protocol.
5 *
6 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
7 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2
11 * as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to:
20 * Free Software Foundation
21 * 51 Franklin Street, Fifth Floor
22 * Boston, MA 02111-1301 USA
23 *
24 */
25
26#include <linux/module.h>
27#include <linux/errno.h>
28#include <linux/fs.h>
29#include <linux/file.h>
30#include <linux/pagemap.h>
31#include <linux/stat.h>
32#include <linux/string.h>
33#include <linux/inet.h>
34#include <linux/namei.h>
35#include <linux/idr.h>
36#include <linux/sched.h>
37#include <linux/slab.h>
38#include <linux/xattr.h>
39#include <linux/posix_acl.h>
40#include <net/9p/9p.h>
41#include <net/9p/client.h>
42
43#include "v9fs.h"
44#include "v9fs_vfs.h"
45#include "fid.h"
46#include "cache.h"
47#include "xattr.h"
48#include "acl.h"
49
50static int
Al Viro1a67aaf2011-07-26 01:52:52 -040051v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -060052 dev_t rdev);
53
54/**
55 * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a
56 * new file system object. This checks the S_ISGID to determine the owning
57 * group of the new file system object.
58 */
59
Eric W. Biedermand4ef4e32013-01-30 12:08:21 -080060static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -060061{
62 BUG_ON(dir_inode == NULL);
63
64 if (dir_inode->i_mode & S_ISGID) {
65 /* set_gid bit is set.*/
66 return dir_inode->i_gid;
67 }
68 return current_fsgid();
69}
70
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +000071static int v9fs_test_inode_dotl(struct inode *inode, void *data)
72{
73 struct v9fs_inode *v9inode = V9FS_I(inode);
74 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
75
76 /* don't match inode of different type */
77 if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
78 return 0;
79
80 if (inode->i_generation != st->st_gen)
81 return 0;
82
83 /* compare qid details */
84 if (memcmp(&v9inode->qid.version,
85 &st->qid.version, sizeof(v9inode->qid.version)))
86 return 0;
87
88 if (v9inode->qid.type != st->qid.type)
89 return 0;
90 return 1;
91}
92
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +053093/* Always get a new inode */
94static int v9fs_test_new_inode_dotl(struct inode *inode, void *data)
95{
96 return 0;
97}
98
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +000099static int v9fs_set_inode_dotl(struct inode *inode, void *data)
100{
101 struct v9fs_inode *v9inode = V9FS_I(inode);
102 struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
103
104 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
105 inode->i_generation = st->st_gen;
106 return 0;
107}
108
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530109static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
110 struct p9_qid *qid,
111 struct p9_fid *fid,
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530112 struct p9_stat_dotl *st,
113 int new)
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530114{
115 int retval;
116 unsigned long i_ino;
117 struct inode *inode;
118 struct v9fs_session_info *v9ses = sb->s_fs_info;
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530119 int (*test)(struct inode *, void *);
120
121 if (new)
122 test = v9fs_test_new_inode_dotl;
123 else
124 test = v9fs_test_inode_dotl;
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530125
126 i_ino = v9fs_qid2ino(qid);
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530127 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530128 if (!inode)
129 return ERR_PTR(-ENOMEM);
130 if (!(inode->i_state & I_NEW))
131 return inode;
132 /*
133 * initialize the inode with the stat info
134 * FIXME!! we may need support for stale inodes
135 * later.
136 */
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000137 inode->i_ino = i_ino;
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000138 retval = v9fs_init_inode(v9ses, inode,
139 st->st_mode, new_decode_dev(st->st_rdev));
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530140 if (retval)
141 goto error;
142
143 v9fs_stat2inode_dotl(st, inode);
144#ifdef CONFIG_9P_FSCACHE
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530145 v9fs_cache_inode_get_cookie(inode);
146#endif
147 retval = v9fs_get_acl(inode, fid);
148 if (retval)
149 goto error;
150
151 unlock_new_inode(inode);
152 return inode;
153error:
154 unlock_new_inode(inode);
155 iput(inode);
156 return ERR_PTR(retval);
157
158}
159
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600160struct inode *
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530161v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530162 struct super_block *sb, int new)
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600163{
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600164 struct p9_stat_dotl *st;
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530165 struct inode *inode = NULL;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600166
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000167 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600168 if (IS_ERR(st))
169 return ERR_CAST(st);
170
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530171 inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600172 kfree(st);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530173 return inode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600174}
175
Aneesh Kumar K.Vf88657c2011-08-03 19:55:32 +0530176struct dotl_openflag_map {
177 int open_flag;
178 int dotl_flag;
179};
180
181static int v9fs_mapped_dotl_flags(int flags)
182{
183 int i;
184 int rflags = 0;
185 struct dotl_openflag_map dotl_oflag_map[] = {
186 { O_CREAT, P9_DOTL_CREATE },
187 { O_EXCL, P9_DOTL_EXCL },
188 { O_NOCTTY, P9_DOTL_NOCTTY },
Aneesh Kumar K.Vf88657c2011-08-03 19:55:32 +0530189 { O_APPEND, P9_DOTL_APPEND },
190 { O_NONBLOCK, P9_DOTL_NONBLOCK },
191 { O_DSYNC, P9_DOTL_DSYNC },
192 { FASYNC, P9_DOTL_FASYNC },
193 { O_DIRECT, P9_DOTL_DIRECT },
194 { O_LARGEFILE, P9_DOTL_LARGEFILE },
195 { O_DIRECTORY, P9_DOTL_DIRECTORY },
196 { O_NOFOLLOW, P9_DOTL_NOFOLLOW },
197 { O_NOATIME, P9_DOTL_NOATIME },
198 { O_CLOEXEC, P9_DOTL_CLOEXEC },
199 { O_SYNC, P9_DOTL_SYNC},
200 };
201 for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
202 if (flags & dotl_oflag_map[i].open_flag)
203 rflags |= dotl_oflag_map[i].dotl_flag;
204 }
205 return rflags;
206}
207
208/**
209 * v9fs_open_to_dotl_flags- convert Linux specific open flags to
210 * plan 9 open flag.
211 * @flags: flags to convert
212 */
213int v9fs_open_to_dotl_flags(int flags)
214{
215 int rflags = 0;
216
217 /*
218 * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
219 * and P9_DOTL_NOACCESS
220 */
221 rflags |= flags & O_ACCMODE;
222 rflags |= v9fs_mapped_dotl_flags(flags);
223
224 return rflags;
225}
226
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600227/**
228 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
229 * @dir: directory inode that is being created
230 * @dentry: dentry that is being deleted
231 * @mode: create permissions
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600232 *
233 */
234
235static int
Al Viro4acdaf22011-07-26 01:42:34 -0400236v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
Al Viroebfc3b42012-06-10 18:05:36 -0400237 bool excl)
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600238{
Miklos Szeredie43ae792012-06-05 15:10:26 +0200239 return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
240}
241
Al Virod9585272012-06-22 12:39:14 +0400242static int
Miklos Szeredie43ae792012-06-05 15:10:26 +0200243v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
Al Viro30d90492012-06-22 12:40:19 +0400244 struct file *file, unsigned flags, umode_t omode,
Al Viro47237682012-06-10 05:01:45 -0400245 int *opened)
Miklos Szeredie43ae792012-06-05 15:10:26 +0200246{
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600247 int err = 0;
Eric W. Biedermand4ef4e32013-01-30 12:08:21 -0800248 kgid_t gid;
Al Virod3fb6122011-07-23 18:37:50 -0400249 umode_t mode;
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530250 char *name = NULL;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600251 struct p9_qid qid;
252 struct inode *inode;
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530253 struct p9_fid *fid = NULL;
254 struct v9fs_inode *v9inode;
255 struct p9_fid *dfid, *ofid, *inode_fid;
256 struct v9fs_session_info *v9ses;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600257 struct posix_acl *pacl = NULL, *dacl = NULL;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200258 struct dentry *res = NULL;
259
260 if (d_unhashed(dentry)) {
Al Viro00cd8dd2012-06-10 17:13:09 -0400261 res = v9fs_vfs_lookup(dir, dentry, 0);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200262 if (IS_ERR(res))
Al Virod9585272012-06-22 12:39:14 +0400263 return PTR_ERR(res);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200264
265 if (res)
266 dentry = res;
267 }
268
269 /* Only creates */
M. Mohan Kumarb6f4bee2013-02-05 14:25:05 +0530270 if (!(flags & O_CREAT))
271 return finish_no_open(file, res);
272 else if (dentry->d_inode) {
273 if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
274 return -EEXIST;
275 else
276 return finish_no_open(file, res);
277 }
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600278
279 v9ses = v9fs_inode2v9ses(dir);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600280
281 name = (char *) dentry->d_name.name;
Linus Torvalds609eac12012-01-10 15:09:01 -0800282 p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%hx\n",
Joe Perches5d385152011-11-28 10:40:46 -0800283 name, flags, omode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600284
285 dfid = v9fs_fid_lookup(dentry->d_parent);
286 if (IS_ERR(dfid)) {
287 err = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800288 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
Al Virod9585272012-06-22 12:39:14 +0400289 goto out;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600290 }
291
292 /* clone a fid to use for creation */
293 ofid = p9_client_walk(dfid, 0, NULL, 1);
294 if (IS_ERR(ofid)) {
295 err = PTR_ERR(ofid);
Joe Perches5d385152011-11-28 10:40:46 -0800296 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
Al Virod9585272012-06-22 12:39:14 +0400297 goto out;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600298 }
299
300 gid = v9fs_get_fsgid_for_create(dir);
301
302 mode = omode;
303 /* Update mode based on ACL value */
304 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
305 if (err) {
Joe Perches5d385152011-11-28 10:40:46 -0800306 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n",
307 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600308 goto error;
309 }
Aneesh Kumar K.Vf88657c2011-08-03 19:55:32 +0530310 err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags),
311 mode, gid, &qid);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600312 if (err < 0) {
Joe Perches5d385152011-11-28 10:40:46 -0800313 p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n",
314 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600315 goto error;
316 }
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530317 v9fs_invalidate_inode_attr(dir);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600318
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600319 /* instantiate inode and assign the unopened fid to the dentry */
320 fid = p9_client_walk(dfid, 1, &name, 1);
321 if (IS_ERR(fid)) {
322 err = PTR_ERR(fid);
Joe Perches5d385152011-11-28 10:40:46 -0800323 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600324 fid = NULL;
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600325 goto error;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600326 }
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530327 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600328 if (IS_ERR(inode)) {
329 err = PTR_ERR(inode);
Joe Perches5d385152011-11-28 10:40:46 -0800330 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600331 goto error;
332 }
Al Viro3592ac42013-01-31 13:45:39 -0500333 /* Now set the ACL based on the default value */
334 v9fs_set_create_acl(inode, fid, dacl, pacl);
335
Al Viro2ea03e1d2013-02-28 01:18:14 -0500336 v9fs_fid_add(dentry, fid);
Aneesh Kumar K.V5441ae52011-07-25 18:06:32 +0000337 d_instantiate(dentry, inode);
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600338
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530339 v9inode = V9FS_I(inode);
Aneesh Kumar K.V5a7e0a82011-03-08 16:39:46 +0530340 mutex_lock(&v9inode->v_mutex);
Aneesh Kumar K.V7add6972011-03-08 16:39:49 +0530341 if (v9ses->cache && !v9inode->writeback_fid &&
342 ((flags & O_ACCMODE) != O_RDONLY)) {
Aneesh Kumar K.V3cf387d2011-02-28 17:03:57 +0530343 /*
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530344 * clone a fid and add it to writeback_fid
Aneesh Kumar K.V3cf387d2011-02-28 17:03:57 +0530345 * we do it during open time instead of
346 * page dirty time via write_begin/page_mkwrite
347 * because we want write after unlink usecase
348 * to work.
349 */
350 inode_fid = v9fs_writeback_fid(dentry);
351 if (IS_ERR(inode_fid)) {
352 err = PTR_ERR(inode_fid);
Aneesh Kumar K.V5a7e0a82011-03-08 16:39:46 +0530353 mutex_unlock(&v9inode->v_mutex);
Aneesh Kumar K.V398c4f02011-05-20 18:55:51 +0000354 goto err_clunk_old_fid;
Aneesh Kumar K.V3cf387d2011-02-28 17:03:57 +0530355 }
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530356 v9inode->writeback_fid = (void *) inode_fid;
Aneesh Kumar K.V3cf387d2011-02-28 17:03:57 +0530357 }
Aneesh Kumar K.V5a7e0a82011-03-08 16:39:46 +0530358 mutex_unlock(&v9inode->v_mutex);
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600359 /* Since we are opening a file, assign the open fid to the file */
Al Viro30d90492012-06-22 12:40:19 +0400360 err = finish_open(file, dentry, generic_file_open, opened);
361 if (err)
Aneesh Kumar K.V398c4f02011-05-20 18:55:51 +0000362 goto err_clunk_old_fid;
Al Viro30d90492012-06-22 12:40:19 +0400363 file->private_data = ofid;
Aneesh Kumar K.V46848de2011-02-28 17:03:55 +0530364#ifdef CONFIG_9P_FSCACHE
365 if (v9ses->cache)
Al Viro30d90492012-06-22 12:40:19 +0400366 v9fs_cache_inode_set_cookie(inode, file);
Aneesh Kumar K.V46848de2011-02-28 17:03:55 +0530367#endif
Al Viro47237682012-06-10 05:01:45 -0400368 *opened |= FILE_CREATED;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200369out:
Al Viro5fa63002013-01-31 13:31:23 -0500370 v9fs_put_acl(dacl, pacl);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200371 dput(res);
Al Virod9585272012-06-22 12:39:14 +0400372 return err;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600373
374error:
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600375 if (fid)
376 p9_client_clunk(fid);
Aneesh Kumar K.V398c4f02011-05-20 18:55:51 +0000377err_clunk_old_fid:
378 if (ofid)
379 p9_client_clunk(ofid);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200380 goto out;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600381}
382
383/**
384 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
385 * @dir: inode that is being unlinked
386 * @dentry: dentry that is being unlinked
387 * @mode: mode for new directory
388 *
389 */
390
391static int v9fs_vfs_mkdir_dotl(struct inode *dir,
Al Viro18bb1db2011-07-26 01:41:39 -0400392 struct dentry *dentry, umode_t omode)
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600393{
394 int err;
395 struct v9fs_session_info *v9ses;
396 struct p9_fid *fid = NULL, *dfid = NULL;
Eric W. Biedermand4ef4e32013-01-30 12:08:21 -0800397 kgid_t gid;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600398 char *name;
Al Virod3fb6122011-07-23 18:37:50 -0400399 umode_t mode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600400 struct inode *inode;
401 struct p9_qid qid;
402 struct dentry *dir_dentry;
403 struct posix_acl *dacl = NULL, *pacl = NULL;
404
Joe Perches5d385152011-11-28 10:40:46 -0800405 p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600406 err = 0;
407 v9ses = v9fs_inode2v9ses(dir);
408
409 omode |= S_IFDIR;
410 if (dir->i_mode & S_ISGID)
411 omode |= S_ISGID;
412
Al Viroaf569592012-04-02 20:02:53 -0400413 dir_dentry = dentry->d_parent;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600414 dfid = v9fs_fid_lookup(dir_dentry);
415 if (IS_ERR(dfid)) {
416 err = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800417 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600418 dfid = NULL;
419 goto error;
420 }
421
422 gid = v9fs_get_fsgid_for_create(dir);
423 mode = omode;
424 /* Update mode based on ACL value */
425 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
426 if (err) {
Joe Perches5d385152011-11-28 10:40:46 -0800427 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
428 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600429 goto error;
430 }
431 name = (char *) dentry->d_name.name;
432 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
433 if (err < 0)
434 goto error;
435
Al Viro3592ac42013-01-31 13:45:39 -0500436 fid = p9_client_walk(dfid, 1, &name, 1);
437 if (IS_ERR(fid)) {
438 err = PTR_ERR(fid);
439 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
440 err);
441 fid = NULL;
442 goto error;
443 }
444
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600445 /* instantiate inode and assign the unopened fid to the dentry */
446 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530447 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600448 if (IS_ERR(inode)) {
449 err = PTR_ERR(inode);
Joe Perches5d385152011-11-28 10:40:46 -0800450 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
451 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600452 goto error;
453 }
Al Viro2ea03e1d2013-02-28 01:18:14 -0500454 v9fs_fid_add(dentry, fid);
Al Viro3592ac42013-01-31 13:45:39 -0500455 v9fs_set_create_acl(inode, fid, dacl, pacl);
Aneesh Kumar K.V5441ae52011-07-25 18:06:32 +0000456 d_instantiate(dentry, inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600457 fid = NULL;
Al Viro2ea03e1d2013-02-28 01:18:14 -0500458 err = 0;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600459 } else {
460 /*
461 * Not in cached mode. No need to populate
462 * inode with stat. We need to get an inode
463 * so that we can set the acl with dentry
464 */
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000465 inode = v9fs_get_inode(dir->i_sb, mode, 0);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600466 if (IS_ERR(inode)) {
467 err = PTR_ERR(inode);
468 goto error;
469 }
Al Viro3592ac42013-01-31 13:45:39 -0500470 v9fs_set_create_acl(inode, fid, dacl, pacl);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600471 d_instantiate(dentry, inode);
472 }
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530473 inc_nlink(dir);
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530474 v9fs_invalidate_inode_attr(dir);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600475error:
476 if (fid)
477 p9_client_clunk(fid);
Al Viro5fa63002013-01-31 13:31:23 -0500478 v9fs_put_acl(dacl, pacl);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600479 return err;
480}
481
482static int
483v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
484 struct kstat *stat)
485{
486 int err;
487 struct v9fs_session_info *v9ses;
488 struct p9_fid *fid;
489 struct p9_stat_dotl *st;
490
Joe Perches5d385152011-11-28 10:40:46 -0800491 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600492 err = -EPERM;
Aneesh Kumar K.V42869c82011-03-08 16:39:50 +0530493 v9ses = v9fs_dentry2v9ses(dentry);
Aneesh Kumar K.Va1211902011-02-28 17:04:01 +0530494 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
495 generic_fillattr(dentry->d_inode, stat);
496 return 0;
497 }
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600498 fid = v9fs_fid_lookup(dentry);
499 if (IS_ERR(fid))
500 return PTR_ERR(fid);
501
502 /* Ask for all the fields in stat structure. Server will return
503 * whatever it supports
504 */
505
506 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
507 if (IS_ERR(st))
508 return PTR_ERR(st);
509
510 v9fs_stat2inode_dotl(st, dentry->d_inode);
511 generic_fillattr(dentry->d_inode, stat);
512 /* Change block size to what the server returned */
513 stat->blksize = st->st_blksize;
514
515 kfree(st);
516 return 0;
517}
518
Aneesh Kumar K.Vf7666192011-12-18 23:03:13 +0530519/*
520 * Attribute flags.
521 */
522#define P9_ATTR_MODE (1 << 0)
523#define P9_ATTR_UID (1 << 1)
524#define P9_ATTR_GID (1 << 2)
525#define P9_ATTR_SIZE (1 << 3)
526#define P9_ATTR_ATIME (1 << 4)
527#define P9_ATTR_MTIME (1 << 5)
528#define P9_ATTR_CTIME (1 << 6)
529#define P9_ATTR_ATIME_SET (1 << 7)
530#define P9_ATTR_MTIME_SET (1 << 8)
531
532struct dotl_iattr_map {
533 int iattr_valid;
534 int p9_iattr_valid;
535};
536
537static int v9fs_mapped_iattr_valid(int iattr_valid)
538{
539 int i;
540 int p9_iattr_valid = 0;
541 struct dotl_iattr_map dotl_iattr_map[] = {
542 { ATTR_MODE, P9_ATTR_MODE },
543 { ATTR_UID, P9_ATTR_UID },
544 { ATTR_GID, P9_ATTR_GID },
545 { ATTR_SIZE, P9_ATTR_SIZE },
546 { ATTR_ATIME, P9_ATTR_ATIME },
547 { ATTR_MTIME, P9_ATTR_MTIME },
548 { ATTR_CTIME, P9_ATTR_CTIME },
549 { ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
550 { ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
551 };
552 for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
553 if (iattr_valid & dotl_iattr_map[i].iattr_valid)
554 p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
555 }
556 return p9_iattr_valid;
557}
558
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600559/**
560 * v9fs_vfs_setattr_dotl - set file metadata
561 * @dentry: file whose metadata to set
562 * @iattr: metadata assignment structure
563 *
564 */
565
566int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
567{
568 int retval;
569 struct v9fs_session_info *v9ses;
570 struct p9_fid *fid;
571 struct p9_iattr_dotl p9attr;
Al Virobe308f02013-01-31 12:58:16 -0500572 struct inode *inode = dentry->d_inode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600573
Joe Perches5d385152011-11-28 10:40:46 -0800574 p9_debug(P9_DEBUG_VFS, "\n");
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600575
Al Virobe308f02013-01-31 12:58:16 -0500576 retval = inode_change_ok(inode, iattr);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600577 if (retval)
578 return retval;
579
Aneesh Kumar K.Vf7666192011-12-18 23:03:13 +0530580 p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600581 p9attr.mode = iattr->ia_mode;
582 p9attr.uid = iattr->ia_uid;
583 p9attr.gid = iattr->ia_gid;
584 p9attr.size = iattr->ia_size;
585 p9attr.atime_sec = iattr->ia_atime.tv_sec;
586 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
587 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
588 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
589
590 retval = -EPERM;
Aneesh Kumar K.V42869c82011-03-08 16:39:50 +0530591 v9ses = v9fs_dentry2v9ses(dentry);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600592 fid = v9fs_fid_lookup(dentry);
593 if (IS_ERR(fid))
594 return PTR_ERR(fid);
595
Aneesh Kumar K.V3dc54362011-02-28 17:04:11 +0530596 /* Write all dirty data */
Al Virobe308f02013-01-31 12:58:16 -0500597 if (S_ISREG(inode->i_mode))
598 filemap_write_and_wait(inode->i_mapping);
Aneesh Kumar K.V3dc54362011-02-28 17:04:11 +0530599
Aneesh Kumar K.Vf10fc502011-02-28 17:04:10 +0530600 retval = p9_client_setattr(fid, &p9attr);
601 if (retval < 0)
602 return retval;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600603
Aneesh Kumar K.V059c1382011-03-08 16:39:48 +0530604 if ((iattr->ia_valid & ATTR_SIZE) &&
Al Virobe308f02013-01-31 12:58:16 -0500605 iattr->ia_size != i_size_read(inode))
606 truncate_setsize(inode, iattr->ia_size);
Aneesh Kumar K.V059c1382011-03-08 16:39:48 +0530607
Al Virobe308f02013-01-31 12:58:16 -0500608 v9fs_invalidate_inode_attr(inode);
609 setattr_copy(inode, iattr);
610 mark_inode_dirty(inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600611 if (iattr->ia_valid & ATTR_MODE) {
612 /* We also want to update ACL when we update mode bits */
Al Virobe308f02013-01-31 12:58:16 -0500613 retval = v9fs_acl_chmod(inode, fid);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600614 if (retval < 0)
615 return retval;
616 }
617 return 0;
618}
619
620/**
621 * v9fs_stat2inode_dotl - populate an inode structure with stat info
622 * @stat: stat structure
623 * @inode: inode to populate
624 * @sb: superblock of filesystem
625 *
626 */
627
628void
629v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
630{
Al Viro3eda0de2011-07-26 02:53:22 -0400631 umode_t mode;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530632 struct v9fs_inode *v9inode = V9FS_I(inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600633
634 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
635 inode->i_atime.tv_sec = stat->st_atime_sec;
636 inode->i_atime.tv_nsec = stat->st_atime_nsec;
637 inode->i_mtime.tv_sec = stat->st_mtime_sec;
638 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
639 inode->i_ctime.tv_sec = stat->st_ctime_sec;
640 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
641 inode->i_uid = stat->st_uid;
642 inode->i_gid = stat->st_gid;
Miklos Szeredibfe86842011-10-28 14:13:29 +0200643 set_nlink(inode, stat->st_nlink);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600644
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000645 mode = stat->st_mode & S_IALLUGO;
646 mode |= inode->i_mode & ~S_IALLUGO;
647 inode->i_mode = mode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600648
649 i_size_write(inode, stat->st_size);
650 inode->i_blocks = stat->st_blocks;
651 } else {
652 if (stat->st_result_mask & P9_STATS_ATIME) {
653 inode->i_atime.tv_sec = stat->st_atime_sec;
654 inode->i_atime.tv_nsec = stat->st_atime_nsec;
655 }
656 if (stat->st_result_mask & P9_STATS_MTIME) {
657 inode->i_mtime.tv_sec = stat->st_mtime_sec;
658 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
659 }
660 if (stat->st_result_mask & P9_STATS_CTIME) {
661 inode->i_ctime.tv_sec = stat->st_ctime_sec;
662 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
663 }
664 if (stat->st_result_mask & P9_STATS_UID)
665 inode->i_uid = stat->st_uid;
666 if (stat->st_result_mask & P9_STATS_GID)
667 inode->i_gid = stat->st_gid;
668 if (stat->st_result_mask & P9_STATS_NLINK)
Miklos Szeredibfe86842011-10-28 14:13:29 +0200669 set_nlink(inode, stat->st_nlink);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600670 if (stat->st_result_mask & P9_STATS_MODE) {
671 inode->i_mode = stat->st_mode;
672 if ((S_ISBLK(inode->i_mode)) ||
673 (S_ISCHR(inode->i_mode)))
674 init_special_inode(inode, inode->i_mode,
675 inode->i_rdev);
676 }
677 if (stat->st_result_mask & P9_STATS_RDEV)
678 inode->i_rdev = new_decode_dev(stat->st_rdev);
679 if (stat->st_result_mask & P9_STATS_SIZE)
680 i_size_write(inode, stat->st_size);
681 if (stat->st_result_mask & P9_STATS_BLOCKS)
682 inode->i_blocks = stat->st_blocks;
683 }
684 if (stat->st_result_mask & P9_STATS_GEN)
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000685 inode->i_generation = stat->st_gen;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600686
687 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
688 * because the inode structure does not have fields for them.
689 */
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530690 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600691}
692
693static int
694v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
695 const char *symname)
696{
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600697 int err;
Eric W. Biedermand4ef4e32013-01-30 12:08:21 -0800698 kgid_t gid;
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530699 char *name;
700 struct p9_qid qid;
701 struct inode *inode;
702 struct p9_fid *dfid;
703 struct p9_fid *fid = NULL;
704 struct v9fs_session_info *v9ses;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600705
706 name = (char *) dentry->d_name.name;
Joe Perches5d385152011-11-28 10:40:46 -0800707 p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600708 v9ses = v9fs_inode2v9ses(dir);
709
710 dfid = v9fs_fid_lookup(dentry->d_parent);
711 if (IS_ERR(dfid)) {
712 err = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800713 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600714 return err;
715 }
716
717 gid = v9fs_get_fsgid_for_create(dir);
718
719 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
720 err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid);
721
722 if (err < 0) {
Joe Perches5d385152011-11-28 10:40:46 -0800723 p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600724 goto error;
725 }
726
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530727 v9fs_invalidate_inode_attr(dir);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600728 if (v9ses->cache) {
729 /* Now walk from the parent so we can get an unopened fid. */
730 fid = p9_client_walk(dfid, 1, &name, 1);
731 if (IS_ERR(fid)) {
732 err = PTR_ERR(fid);
Joe Perches5d385152011-11-28 10:40:46 -0800733 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
734 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600735 fid = NULL;
736 goto error;
737 }
738
739 /* instantiate inode and assign the unopened fid to dentry */
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530740 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600741 if (IS_ERR(inode)) {
742 err = PTR_ERR(inode);
Joe Perches5d385152011-11-28 10:40:46 -0800743 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
744 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600745 goto error;
746 }
Al Viro2ea03e1d2013-02-28 01:18:14 -0500747 v9fs_fid_add(dentry, fid);
Aneesh Kumar K.V5441ae52011-07-25 18:06:32 +0000748 d_instantiate(dentry, inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600749 fid = NULL;
Al Viro2ea03e1d2013-02-28 01:18:14 -0500750 err = 0;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600751 } else {
752 /* Not in cached mode. No need to populate inode with stat */
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000753 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600754 if (IS_ERR(inode)) {
755 err = PTR_ERR(inode);
756 goto error;
757 }
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600758 d_instantiate(dentry, inode);
759 }
760
761error:
762 if (fid)
763 p9_client_clunk(fid);
764
765 return err;
766}
767
768/**
769 * v9fs_vfs_link_dotl - create a hardlink for dotl
770 * @old_dentry: dentry for file to link to
771 * @dir: inode destination for new link
772 * @dentry: dentry for link
773 *
774 */
775
776static int
777v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
778 struct dentry *dentry)
779{
780 int err;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600781 char *name;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600782 struct dentry *dir_dentry;
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530783 struct p9_fid *dfid, *oldfid;
784 struct v9fs_session_info *v9ses;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600785
Joe Perches5d385152011-11-28 10:40:46 -0800786 p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n",
787 dir->i_ino, old_dentry->d_name.name, dentry->d_name.name);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600788
789 v9ses = v9fs_inode2v9ses(dir);
Al Viroaf569592012-04-02 20:02:53 -0400790 dir_dentry = dentry->d_parent;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600791 dfid = v9fs_fid_lookup(dir_dentry);
792 if (IS_ERR(dfid))
793 return PTR_ERR(dfid);
794
795 oldfid = v9fs_fid_lookup(old_dentry);
796 if (IS_ERR(oldfid))
797 return PTR_ERR(oldfid);
798
799 name = (char *) dentry->d_name.name;
800
801 err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
802
803 if (err < 0) {
Joe Perches5d385152011-11-28 10:40:46 -0800804 p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600805 return err;
806 }
807
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530808 v9fs_invalidate_inode_attr(dir);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600809 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
810 /* Get the latest stat info from server. */
811 struct p9_fid *fid;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600812 fid = v9fs_fid_lookup(old_dentry);
813 if (IS_ERR(fid))
814 return PTR_ERR(fid);
815
Aneesh Kumar K.Vc06c0662011-02-28 17:04:09 +0530816 v9fs_refresh_inode_dotl(fid, old_dentry->d_inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600817 }
Aneesh Kumar K.V20656a42011-02-28 17:03:55 +0530818 ihold(old_dentry->d_inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600819 d_instantiate(dentry, old_dentry->d_inode);
820
821 return err;
822}
823
824/**
825 * v9fs_vfs_mknod_dotl - create a special file
826 * @dir: inode destination for new link
827 * @dentry: dentry for file
828 * @mode: mode for creation
829 * @rdev: device associated with special file
830 *
831 */
832static int
Al Viro1a67aaf2011-07-26 01:52:52 -0400833v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600834 dev_t rdev)
835{
836 int err;
Eric W. Biedermand4ef4e32013-01-30 12:08:21 -0800837 kgid_t gid;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600838 char *name;
Al Virod3fb6122011-07-23 18:37:50 -0400839 umode_t mode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600840 struct v9fs_session_info *v9ses;
841 struct p9_fid *fid = NULL, *dfid = NULL;
842 struct inode *inode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600843 struct p9_qid qid;
844 struct dentry *dir_dentry;
845 struct posix_acl *dacl = NULL, *pacl = NULL;
846
Linus Torvalds609eac12012-01-10 15:09:01 -0800847 p9_debug(P9_DEBUG_VFS, " %lu,%s mode: %hx MAJOR: %u MINOR: %u\n",
Joe Perches5d385152011-11-28 10:40:46 -0800848 dir->i_ino, dentry->d_name.name, omode,
849 MAJOR(rdev), MINOR(rdev));
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600850
851 if (!new_valid_dev(rdev))
852 return -EINVAL;
853
854 v9ses = v9fs_inode2v9ses(dir);
Al Viroaf569592012-04-02 20:02:53 -0400855 dir_dentry = dentry->d_parent;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600856 dfid = v9fs_fid_lookup(dir_dentry);
857 if (IS_ERR(dfid)) {
858 err = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800859 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600860 dfid = NULL;
861 goto error;
862 }
863
864 gid = v9fs_get_fsgid_for_create(dir);
865 mode = omode;
866 /* Update mode based on ACL value */
867 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
868 if (err) {
Joe Perches5d385152011-11-28 10:40:46 -0800869 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
870 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600871 goto error;
872 }
873 name = (char *) dentry->d_name.name;
874
875 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
876 if (err < 0)
877 goto error;
878
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530879 v9fs_invalidate_inode_attr(dir);
Al Viro3592ac42013-01-31 13:45:39 -0500880 fid = p9_client_walk(dfid, 1, &name, 1);
881 if (IS_ERR(fid)) {
882 err = PTR_ERR(fid);
883 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
884 err);
885 fid = NULL;
886 goto error;
887 }
888
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600889 /* instantiate inode and assign the unopened fid to the dentry */
890 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530891 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600892 if (IS_ERR(inode)) {
893 err = PTR_ERR(inode);
Joe Perches5d385152011-11-28 10:40:46 -0800894 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
895 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600896 goto error;
897 }
Al Viro3592ac42013-01-31 13:45:39 -0500898 v9fs_set_create_acl(inode, fid, dacl, pacl);
Al Viro2ea03e1d2013-02-28 01:18:14 -0500899 v9fs_fid_add(dentry, fid);
Aneesh Kumar K.V5441ae52011-07-25 18:06:32 +0000900 d_instantiate(dentry, inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600901 fid = NULL;
Al Viro2ea03e1d2013-02-28 01:18:14 -0500902 err = 0;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600903 } else {
904 /*
905 * Not in cached mode. No need to populate inode with stat.
906 * socket syscall returns a fd, so we need instantiate
907 */
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000908 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600909 if (IS_ERR(inode)) {
910 err = PTR_ERR(inode);
911 goto error;
912 }
Al Viro3592ac42013-01-31 13:45:39 -0500913 v9fs_set_create_acl(inode, fid, dacl, pacl);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600914 d_instantiate(dentry, inode);
915 }
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600916error:
917 if (fid)
918 p9_client_clunk(fid);
Al Viro5fa63002013-01-31 13:31:23 -0500919 v9fs_put_acl(dacl, pacl);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600920 return err;
921}
922
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600923/**
924 * v9fs_vfs_follow_link_dotl - follow a symlink path
925 * @dentry: dentry for symlink
926 * @nd: nameidata
927 *
928 */
929
930static void *
931v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd)
932{
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530933 int retval;
934 struct p9_fid *fid;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600935 char *link = __getname();
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530936 char *target;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600937
Joe Perches5d385152011-11-28 10:40:46 -0800938 p9_debug(P9_DEBUG_VFS, "%s\n", dentry->d_name.name);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600939
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530940 if (!link) {
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600941 link = ERR_PTR(-ENOMEM);
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530942 goto ndset;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600943 }
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530944 fid = v9fs_fid_lookup(dentry);
945 if (IS_ERR(fid)) {
946 __putname(link);
Aneesh Kumar K.V936bb2d2011-03-24 23:04:41 +0530947 link = ERR_CAST(fid);
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530948 goto ndset;
949 }
950 retval = p9_client_readlink(fid, &target);
951 if (!retval) {
952 strcpy(link, target);
953 kfree(target);
954 goto ndset;
955 }
956 __putname(link);
957 link = ERR_PTR(retval);
958ndset:
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600959 nd_set_link(nd, link);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600960 return NULL;
961}
962
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530963int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
964{
965 loff_t i_size;
966 struct p9_stat_dotl *st;
967 struct v9fs_session_info *v9ses;
968
969 v9ses = v9fs_inode2v9ses(inode);
970 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
971 if (IS_ERR(st))
972 return PTR_ERR(st);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000973 /*
974 * Don't update inode if the file type is different
975 */
976 if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
977 goto out;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530978
979 spin_lock(&inode->i_lock);
980 /*
981 * We don't want to refresh inode->i_size,
982 * because we may have cached data
983 */
984 i_size = inode->i_size;
985 v9fs_stat2inode_dotl(st, inode);
986 if (v9ses->cache)
987 inode->i_size = i_size;
988 spin_unlock(&inode->i_lock);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000989out:
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530990 kfree(st);
991 return 0;
992}
993
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600994const struct inode_operations v9fs_dir_inode_operations_dotl = {
995 .create = v9fs_vfs_create_dotl,
Miklos Szeredie43ae792012-06-05 15:10:26 +0200996 .atomic_open = v9fs_vfs_atomic_open_dotl,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600997 .lookup = v9fs_vfs_lookup,
998 .link = v9fs_vfs_link_dotl,
999 .symlink = v9fs_vfs_symlink_dotl,
1000 .unlink = v9fs_vfs_unlink,
1001 .mkdir = v9fs_vfs_mkdir_dotl,
1002 .rmdir = v9fs_vfs_rmdir,
1003 .mknod = v9fs_vfs_mknod_dotl,
1004 .rename = v9fs_vfs_rename,
1005 .getattr = v9fs_vfs_getattr_dotl,
1006 .setattr = v9fs_vfs_setattr_dotl,
1007 .setxattr = generic_setxattr,
1008 .getxattr = generic_getxattr,
1009 .removexattr = generic_removexattr,
1010 .listxattr = v9fs_listxattr,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001011 .get_acl = v9fs_iop_get_acl,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -06001012};
1013
1014const struct inode_operations v9fs_file_inode_operations_dotl = {
1015 .getattr = v9fs_vfs_getattr_dotl,
1016 .setattr = v9fs_vfs_setattr_dotl,
1017 .setxattr = generic_setxattr,
1018 .getxattr = generic_getxattr,
1019 .removexattr = generic_removexattr,
1020 .listxattr = v9fs_listxattr,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001021 .get_acl = v9fs_iop_get_acl,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -06001022};
1023
1024const struct inode_operations v9fs_symlink_inode_operations_dotl = {
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +05301025 .readlink = generic_readlink,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -06001026 .follow_link = v9fs_vfs_follow_link_dotl,
1027 .put_link = v9fs_vfs_put_link,
1028 .getattr = v9fs_vfs_getattr_dotl,
1029 .setattr = v9fs_vfs_setattr_dotl,
1030 .setxattr = generic_setxattr,
1031 .getxattr = generic_getxattr,
1032 .removexattr = generic_removexattr,
1033 .listxattr = v9fs_listxattr,
1034};