blob: 02b64f4e576ac48aa2f3310be3634e65c28a6079 [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);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530144 v9fs_cache_inode_get_cookie(inode);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530145 retval = v9fs_get_acl(inode, fid);
146 if (retval)
147 goto error;
148
149 unlock_new_inode(inode);
150 return inode;
151error:
152 unlock_new_inode(inode);
153 iput(inode);
154 return ERR_PTR(retval);
155
156}
157
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600158struct inode *
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530159v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530160 struct super_block *sb, int new)
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600161{
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600162 struct p9_stat_dotl *st;
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530163 struct inode *inode = NULL;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600164
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000165 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600166 if (IS_ERR(st))
167 return ERR_CAST(st);
168
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530169 inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600170 kfree(st);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530171 return inode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600172}
173
Aneesh Kumar K.Vf88657c2011-08-03 19:55:32 +0530174struct dotl_openflag_map {
175 int open_flag;
176 int dotl_flag;
177};
178
179static int v9fs_mapped_dotl_flags(int flags)
180{
181 int i;
182 int rflags = 0;
183 struct dotl_openflag_map dotl_oflag_map[] = {
184 { O_CREAT, P9_DOTL_CREATE },
185 { O_EXCL, P9_DOTL_EXCL },
186 { O_NOCTTY, P9_DOTL_NOCTTY },
Aneesh Kumar K.Vf88657c2011-08-03 19:55:32 +0530187 { O_APPEND, P9_DOTL_APPEND },
188 { O_NONBLOCK, P9_DOTL_NONBLOCK },
189 { O_DSYNC, P9_DOTL_DSYNC },
190 { FASYNC, P9_DOTL_FASYNC },
191 { O_DIRECT, P9_DOTL_DIRECT },
192 { O_LARGEFILE, P9_DOTL_LARGEFILE },
193 { O_DIRECTORY, P9_DOTL_DIRECTORY },
194 { O_NOFOLLOW, P9_DOTL_NOFOLLOW },
195 { O_NOATIME, P9_DOTL_NOATIME },
196 { O_CLOEXEC, P9_DOTL_CLOEXEC },
197 { O_SYNC, P9_DOTL_SYNC},
198 };
199 for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
200 if (flags & dotl_oflag_map[i].open_flag)
201 rflags |= dotl_oflag_map[i].dotl_flag;
202 }
203 return rflags;
204}
205
206/**
207 * v9fs_open_to_dotl_flags- convert Linux specific open flags to
208 * plan 9 open flag.
209 * @flags: flags to convert
210 */
211int v9fs_open_to_dotl_flags(int flags)
212{
213 int rflags = 0;
214
215 /*
216 * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
217 * and P9_DOTL_NOACCESS
218 */
219 rflags |= flags & O_ACCMODE;
220 rflags |= v9fs_mapped_dotl_flags(flags);
221
222 return rflags;
223}
224
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600225/**
226 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
227 * @dir: directory inode that is being created
228 * @dentry: dentry that is being deleted
Fabian Frederickfd2916b2014-06-04 16:06:26 -0700229 * @omode: create permissions
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600230 *
231 */
232
233static int
Al Viro4acdaf22011-07-26 01:42:34 -0400234v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
Al Viroebfc3b42012-06-10 18:05:36 -0400235 bool excl)
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600236{
Miklos Szeredie43ae792012-06-05 15:10:26 +0200237 return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
238}
239
Al Virod9585272012-06-22 12:39:14 +0400240static int
Miklos Szeredie43ae792012-06-05 15:10:26 +0200241v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
Al Viro30d90492012-06-22 12:40:19 +0400242 struct file *file, unsigned flags, umode_t omode,
Al Viro47237682012-06-10 05:01:45 -0400243 int *opened)
Miklos Szeredie43ae792012-06-05 15:10:26 +0200244{
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600245 int err = 0;
Eric W. Biedermand4ef4e32013-01-30 12:08:21 -0800246 kgid_t gid;
Al Virod3fb6122011-07-23 18:37:50 -0400247 umode_t mode;
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530248 char *name = NULL;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600249 struct p9_qid qid;
250 struct inode *inode;
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530251 struct p9_fid *fid = NULL;
252 struct v9fs_inode *v9inode;
253 struct p9_fid *dfid, *ofid, *inode_fid;
254 struct v9fs_session_info *v9ses;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600255 struct posix_acl *pacl = NULL, *dacl = NULL;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200256 struct dentry *res = NULL;
257
258 if (d_unhashed(dentry)) {
Al Viro00cd8dd2012-06-10 17:13:09 -0400259 res = v9fs_vfs_lookup(dir, dentry, 0);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200260 if (IS_ERR(res))
Al Virod9585272012-06-22 12:39:14 +0400261 return PTR_ERR(res);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200262
263 if (res)
264 dentry = res;
265 }
266
267 /* Only creates */
Al Viro03da6332013-09-16 19:22:33 -0400268 if (!(flags & O_CREAT) || dentry->d_inode)
M. Mohan Kumarb6f4bee2013-02-05 14:25:05 +0530269 return finish_no_open(file, res);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600270
271 v9ses = v9fs_inode2v9ses(dir);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600272
273 name = (char *) dentry->d_name.name;
Linus Torvalds609eac12012-01-10 15:09:01 -0800274 p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%hx\n",
Joe Perches5d385152011-11-28 10:40:46 -0800275 name, flags, omode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600276
277 dfid = v9fs_fid_lookup(dentry->d_parent);
278 if (IS_ERR(dfid)) {
279 err = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800280 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
Al Virod9585272012-06-22 12:39:14 +0400281 goto out;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600282 }
283
284 /* clone a fid to use for creation */
285 ofid = p9_client_walk(dfid, 0, NULL, 1);
286 if (IS_ERR(ofid)) {
287 err = PTR_ERR(ofid);
Joe Perches5d385152011-11-28 10:40:46 -0800288 p9_debug(P9_DEBUG_VFS, "p9_client_walk 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 gid = v9fs_get_fsgid_for_create(dir);
293
294 mode = omode;
295 /* Update mode based on ACL value */
296 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
297 if (err) {
Joe Perches5d385152011-11-28 10:40:46 -0800298 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n",
299 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600300 goto error;
301 }
Aneesh Kumar K.Vf88657c2011-08-03 19:55:32 +0530302 err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags),
303 mode, gid, &qid);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600304 if (err < 0) {
Joe Perches5d385152011-11-28 10:40:46 -0800305 p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n",
306 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600307 goto error;
308 }
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530309 v9fs_invalidate_inode_attr(dir);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600310
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600311 /* instantiate inode and assign the unopened fid to the dentry */
312 fid = p9_client_walk(dfid, 1, &name, 1);
313 if (IS_ERR(fid)) {
314 err = PTR_ERR(fid);
Joe Perches5d385152011-11-28 10:40:46 -0800315 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600316 fid = NULL;
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600317 goto error;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600318 }
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530319 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600320 if (IS_ERR(inode)) {
321 err = PTR_ERR(inode);
Joe Perches5d385152011-11-28 10:40:46 -0800322 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600323 goto error;
324 }
Al Viro3592ac42013-01-31 13:45:39 -0500325 /* Now set the ACL based on the default value */
326 v9fs_set_create_acl(inode, fid, dacl, pacl);
327
Al Viro2ea03e1d2013-02-28 01:18:14 -0500328 v9fs_fid_add(dentry, fid);
Aneesh Kumar K.V5441ae52011-07-25 18:06:32 +0000329 d_instantiate(dentry, inode);
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600330
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530331 v9inode = V9FS_I(inode);
Aneesh Kumar K.V5a7e0a82011-03-08 16:39:46 +0530332 mutex_lock(&v9inode->v_mutex);
Dominique Martinetfb89b452014-01-10 13:44:09 +0100333 if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
334 !v9inode->writeback_fid &&
Aneesh Kumar K.V7add6972011-03-08 16:39:49 +0530335 ((flags & O_ACCMODE) != O_RDONLY)) {
Aneesh Kumar K.V3cf387d2011-02-28 17:03:57 +0530336 /*
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530337 * clone a fid and add it to writeback_fid
Aneesh Kumar K.V3cf387d2011-02-28 17:03:57 +0530338 * we do it during open time instead of
339 * page dirty time via write_begin/page_mkwrite
340 * because we want write after unlink usecase
341 * to work.
342 */
343 inode_fid = v9fs_writeback_fid(dentry);
344 if (IS_ERR(inode_fid)) {
345 err = PTR_ERR(inode_fid);
Aneesh Kumar K.V5a7e0a82011-03-08 16:39:46 +0530346 mutex_unlock(&v9inode->v_mutex);
Aneesh Kumar K.V398c4f02011-05-20 18:55:51 +0000347 goto err_clunk_old_fid;
Aneesh Kumar K.V3cf387d2011-02-28 17:03:57 +0530348 }
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530349 v9inode->writeback_fid = (void *) inode_fid;
Aneesh Kumar K.V3cf387d2011-02-28 17:03:57 +0530350 }
Aneesh Kumar K.V5a7e0a82011-03-08 16:39:46 +0530351 mutex_unlock(&v9inode->v_mutex);
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600352 /* Since we are opening a file, assign the open fid to the file */
Al Viro30d90492012-06-22 12:40:19 +0400353 err = finish_open(file, dentry, generic_file_open, opened);
354 if (err)
Aneesh Kumar K.V398c4f02011-05-20 18:55:51 +0000355 goto err_clunk_old_fid;
Al Viro30d90492012-06-22 12:40:19 +0400356 file->private_data = ofid;
Dominique Martinetfb89b452014-01-10 13:44:09 +0100357 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
Al Viro30d90492012-06-22 12:40:19 +0400358 v9fs_cache_inode_set_cookie(inode, file);
Al Viro47237682012-06-10 05:01:45 -0400359 *opened |= FILE_CREATED;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200360out:
Al Viro5fa63002013-01-31 13:31:23 -0500361 v9fs_put_acl(dacl, pacl);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200362 dput(res);
Al Virod9585272012-06-22 12:39:14 +0400363 return err;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600364
365error:
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600366 if (fid)
367 p9_client_clunk(fid);
Aneesh Kumar K.V398c4f02011-05-20 18:55:51 +0000368err_clunk_old_fid:
369 if (ofid)
370 p9_client_clunk(ofid);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200371 goto out;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600372}
373
374/**
375 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
376 * @dir: inode that is being unlinked
377 * @dentry: dentry that is being unlinked
Fabian Frederickfd2916b2014-06-04 16:06:26 -0700378 * @omode: mode for new directory
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600379 *
380 */
381
382static int v9fs_vfs_mkdir_dotl(struct inode *dir,
Al Viro18bb1db2011-07-26 01:41:39 -0400383 struct dentry *dentry, umode_t omode)
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600384{
385 int err;
386 struct v9fs_session_info *v9ses;
387 struct p9_fid *fid = NULL, *dfid = NULL;
Eric W. Biedermand4ef4e32013-01-30 12:08:21 -0800388 kgid_t gid;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600389 char *name;
Al Virod3fb6122011-07-23 18:37:50 -0400390 umode_t mode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600391 struct inode *inode;
392 struct p9_qid qid;
393 struct dentry *dir_dentry;
394 struct posix_acl *dacl = NULL, *pacl = NULL;
395
Al Viro4b8e9922014-08-19 20:17:38 -0400396 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600397 err = 0;
398 v9ses = v9fs_inode2v9ses(dir);
399
400 omode |= S_IFDIR;
401 if (dir->i_mode & S_ISGID)
402 omode |= S_ISGID;
403
Al Viroaf569592012-04-02 20:02:53 -0400404 dir_dentry = dentry->d_parent;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600405 dfid = v9fs_fid_lookup(dir_dentry);
406 if (IS_ERR(dfid)) {
407 err = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800408 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600409 dfid = NULL;
410 goto error;
411 }
412
413 gid = v9fs_get_fsgid_for_create(dir);
414 mode = omode;
415 /* Update mode based on ACL value */
416 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
417 if (err) {
Joe Perches5d385152011-11-28 10:40:46 -0800418 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
419 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600420 goto error;
421 }
422 name = (char *) dentry->d_name.name;
423 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
424 if (err < 0)
425 goto error;
426
Al Viro3592ac42013-01-31 13:45:39 -0500427 fid = p9_client_walk(dfid, 1, &name, 1);
428 if (IS_ERR(fid)) {
429 err = PTR_ERR(fid);
430 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
431 err);
432 fid = NULL;
433 goto error;
434 }
435
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600436 /* instantiate inode and assign the unopened fid to the dentry */
437 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530438 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600439 if (IS_ERR(inode)) {
440 err = PTR_ERR(inode);
Joe Perches5d385152011-11-28 10:40:46 -0800441 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
442 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600443 goto error;
444 }
Al Viro2ea03e1d2013-02-28 01:18:14 -0500445 v9fs_fid_add(dentry, fid);
Al Viro3592ac42013-01-31 13:45:39 -0500446 v9fs_set_create_acl(inode, fid, dacl, pacl);
Aneesh Kumar K.V5441ae52011-07-25 18:06:32 +0000447 d_instantiate(dentry, inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600448 fid = NULL;
Al Viro2ea03e1d2013-02-28 01:18:14 -0500449 err = 0;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600450 } else {
451 /*
452 * Not in cached mode. No need to populate
453 * inode with stat. We need to get an inode
454 * so that we can set the acl with dentry
455 */
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000456 inode = v9fs_get_inode(dir->i_sb, mode, 0);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600457 if (IS_ERR(inode)) {
458 err = PTR_ERR(inode);
459 goto error;
460 }
Al Viro3592ac42013-01-31 13:45:39 -0500461 v9fs_set_create_acl(inode, fid, dacl, pacl);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600462 d_instantiate(dentry, inode);
463 }
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530464 inc_nlink(dir);
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530465 v9fs_invalidate_inode_attr(dir);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600466error:
467 if (fid)
468 p9_client_clunk(fid);
Al Viro5fa63002013-01-31 13:31:23 -0500469 v9fs_put_acl(dacl, pacl);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600470 return err;
471}
472
473static int
474v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
475 struct kstat *stat)
476{
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600477 struct v9fs_session_info *v9ses;
478 struct p9_fid *fid;
479 struct p9_stat_dotl *st;
480
Joe Perches5d385152011-11-28 10:40:46 -0800481 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
Aneesh Kumar K.V42869c82011-03-08 16:39:50 +0530482 v9ses = v9fs_dentry2v9ses(dentry);
Aneesh Kumar K.Va1211902011-02-28 17:04:01 +0530483 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
484 generic_fillattr(dentry->d_inode, stat);
485 return 0;
486 }
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600487 fid = v9fs_fid_lookup(dentry);
488 if (IS_ERR(fid))
489 return PTR_ERR(fid);
490
491 /* Ask for all the fields in stat structure. Server will return
492 * whatever it supports
493 */
494
495 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
496 if (IS_ERR(st))
497 return PTR_ERR(st);
498
499 v9fs_stat2inode_dotl(st, dentry->d_inode);
500 generic_fillattr(dentry->d_inode, stat);
501 /* Change block size to what the server returned */
502 stat->blksize = st->st_blksize;
503
504 kfree(st);
505 return 0;
506}
507
Aneesh Kumar K.Vf7666192011-12-18 23:03:13 +0530508/*
509 * Attribute flags.
510 */
511#define P9_ATTR_MODE (1 << 0)
512#define P9_ATTR_UID (1 << 1)
513#define P9_ATTR_GID (1 << 2)
514#define P9_ATTR_SIZE (1 << 3)
515#define P9_ATTR_ATIME (1 << 4)
516#define P9_ATTR_MTIME (1 << 5)
517#define P9_ATTR_CTIME (1 << 6)
518#define P9_ATTR_ATIME_SET (1 << 7)
519#define P9_ATTR_MTIME_SET (1 << 8)
520
521struct dotl_iattr_map {
522 int iattr_valid;
523 int p9_iattr_valid;
524};
525
526static int v9fs_mapped_iattr_valid(int iattr_valid)
527{
528 int i;
529 int p9_iattr_valid = 0;
530 struct dotl_iattr_map dotl_iattr_map[] = {
531 { ATTR_MODE, P9_ATTR_MODE },
532 { ATTR_UID, P9_ATTR_UID },
533 { ATTR_GID, P9_ATTR_GID },
534 { ATTR_SIZE, P9_ATTR_SIZE },
535 { ATTR_ATIME, P9_ATTR_ATIME },
536 { ATTR_MTIME, P9_ATTR_MTIME },
537 { ATTR_CTIME, P9_ATTR_CTIME },
538 { ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
539 { ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
540 };
541 for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
542 if (iattr_valid & dotl_iattr_map[i].iattr_valid)
543 p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
544 }
545 return p9_iattr_valid;
546}
547
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600548/**
549 * v9fs_vfs_setattr_dotl - set file metadata
550 * @dentry: file whose metadata to set
551 * @iattr: metadata assignment structure
552 *
553 */
554
555int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
556{
557 int retval;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600558 struct p9_fid *fid;
559 struct p9_iattr_dotl p9attr;
Al Virobe308f02013-01-31 12:58:16 -0500560 struct inode *inode = dentry->d_inode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600561
Joe Perches5d385152011-11-28 10:40:46 -0800562 p9_debug(P9_DEBUG_VFS, "\n");
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600563
Al Virobe308f02013-01-31 12:58:16 -0500564 retval = inode_change_ok(inode, iattr);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600565 if (retval)
566 return retval;
567
Aneesh Kumar K.Vf7666192011-12-18 23:03:13 +0530568 p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600569 p9attr.mode = iattr->ia_mode;
570 p9attr.uid = iattr->ia_uid;
571 p9attr.gid = iattr->ia_gid;
572 p9attr.size = iattr->ia_size;
573 p9attr.atime_sec = iattr->ia_atime.tv_sec;
574 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
575 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
576 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
577
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600578 fid = v9fs_fid_lookup(dentry);
579 if (IS_ERR(fid))
580 return PTR_ERR(fid);
581
Aneesh Kumar K.V3dc54362011-02-28 17:04:11 +0530582 /* Write all dirty data */
Al Virobe308f02013-01-31 12:58:16 -0500583 if (S_ISREG(inode->i_mode))
584 filemap_write_and_wait(inode->i_mapping);
Aneesh Kumar K.V3dc54362011-02-28 17:04:11 +0530585
Aneesh Kumar K.Vf10fc502011-02-28 17:04:10 +0530586 retval = p9_client_setattr(fid, &p9attr);
587 if (retval < 0)
588 return retval;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600589
Aneesh Kumar K.V059c1382011-03-08 16:39:48 +0530590 if ((iattr->ia_valid & ATTR_SIZE) &&
Al Virobe308f02013-01-31 12:58:16 -0500591 iattr->ia_size != i_size_read(inode))
592 truncate_setsize(inode, iattr->ia_size);
Aneesh Kumar K.V059c1382011-03-08 16:39:48 +0530593
Al Virobe308f02013-01-31 12:58:16 -0500594 v9fs_invalidate_inode_attr(inode);
595 setattr_copy(inode, iattr);
596 mark_inode_dirty(inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600597 if (iattr->ia_valid & ATTR_MODE) {
598 /* We also want to update ACL when we update mode bits */
Al Virobe308f02013-01-31 12:58:16 -0500599 retval = v9fs_acl_chmod(inode, fid);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600600 if (retval < 0)
601 return retval;
602 }
603 return 0;
604}
605
606/**
607 * v9fs_stat2inode_dotl - populate an inode structure with stat info
608 * @stat: stat structure
609 * @inode: inode to populate
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600610 *
611 */
612
613void
614v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
615{
Al Viro3eda0de2011-07-26 02:53:22 -0400616 umode_t mode;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530617 struct v9fs_inode *v9inode = V9FS_I(inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600618
619 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
620 inode->i_atime.tv_sec = stat->st_atime_sec;
621 inode->i_atime.tv_nsec = stat->st_atime_nsec;
622 inode->i_mtime.tv_sec = stat->st_mtime_sec;
623 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
624 inode->i_ctime.tv_sec = stat->st_ctime_sec;
625 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
626 inode->i_uid = stat->st_uid;
627 inode->i_gid = stat->st_gid;
Miklos Szeredibfe86842011-10-28 14:13:29 +0200628 set_nlink(inode, stat->st_nlink);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600629
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000630 mode = stat->st_mode & S_IALLUGO;
631 mode |= inode->i_mode & ~S_IALLUGO;
632 inode->i_mode = mode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600633
634 i_size_write(inode, stat->st_size);
635 inode->i_blocks = stat->st_blocks;
636 } else {
637 if (stat->st_result_mask & P9_STATS_ATIME) {
638 inode->i_atime.tv_sec = stat->st_atime_sec;
639 inode->i_atime.tv_nsec = stat->st_atime_nsec;
640 }
641 if (stat->st_result_mask & P9_STATS_MTIME) {
642 inode->i_mtime.tv_sec = stat->st_mtime_sec;
643 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
644 }
645 if (stat->st_result_mask & P9_STATS_CTIME) {
646 inode->i_ctime.tv_sec = stat->st_ctime_sec;
647 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
648 }
649 if (stat->st_result_mask & P9_STATS_UID)
650 inode->i_uid = stat->st_uid;
651 if (stat->st_result_mask & P9_STATS_GID)
652 inode->i_gid = stat->st_gid;
653 if (stat->st_result_mask & P9_STATS_NLINK)
Miklos Szeredibfe86842011-10-28 14:13:29 +0200654 set_nlink(inode, stat->st_nlink);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600655 if (stat->st_result_mask & P9_STATS_MODE) {
656 inode->i_mode = stat->st_mode;
657 if ((S_ISBLK(inode->i_mode)) ||
658 (S_ISCHR(inode->i_mode)))
659 init_special_inode(inode, inode->i_mode,
660 inode->i_rdev);
661 }
662 if (stat->st_result_mask & P9_STATS_RDEV)
663 inode->i_rdev = new_decode_dev(stat->st_rdev);
664 if (stat->st_result_mask & P9_STATS_SIZE)
665 i_size_write(inode, stat->st_size);
666 if (stat->st_result_mask & P9_STATS_BLOCKS)
667 inode->i_blocks = stat->st_blocks;
668 }
669 if (stat->st_result_mask & P9_STATS_GEN)
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000670 inode->i_generation = stat->st_gen;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600671
672 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
673 * because the inode structure does not have fields for them.
674 */
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530675 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600676}
677
678static int
679v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
680 const char *symname)
681{
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600682 int err;
Eric W. Biedermand4ef4e32013-01-30 12:08:21 -0800683 kgid_t gid;
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530684 char *name;
685 struct p9_qid qid;
686 struct inode *inode;
687 struct p9_fid *dfid;
688 struct p9_fid *fid = NULL;
689 struct v9fs_session_info *v9ses;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600690
691 name = (char *) dentry->d_name.name;
Joe Perches5d385152011-11-28 10:40:46 -0800692 p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600693 v9ses = v9fs_inode2v9ses(dir);
694
695 dfid = v9fs_fid_lookup(dentry->d_parent);
696 if (IS_ERR(dfid)) {
697 err = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800698 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600699 return err;
700 }
701
702 gid = v9fs_get_fsgid_for_create(dir);
703
704 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
705 err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid);
706
707 if (err < 0) {
Joe Perches5d385152011-11-28 10:40:46 -0800708 p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600709 goto error;
710 }
711
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530712 v9fs_invalidate_inode_attr(dir);
Dominique Martinetfb89b452014-01-10 13:44:09 +0100713 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600714 /* Now walk from the parent so we can get an unopened fid. */
715 fid = p9_client_walk(dfid, 1, &name, 1);
716 if (IS_ERR(fid)) {
717 err = PTR_ERR(fid);
Joe Perches5d385152011-11-28 10:40:46 -0800718 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
719 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600720 fid = NULL;
721 goto error;
722 }
723
724 /* instantiate inode and assign the unopened fid to dentry */
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530725 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600726 if (IS_ERR(inode)) {
727 err = PTR_ERR(inode);
Joe Perches5d385152011-11-28 10:40:46 -0800728 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
729 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600730 goto error;
731 }
Al Viro2ea03e1d2013-02-28 01:18:14 -0500732 v9fs_fid_add(dentry, fid);
Aneesh Kumar K.V5441ae52011-07-25 18:06:32 +0000733 d_instantiate(dentry, inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600734 fid = NULL;
Al Viro2ea03e1d2013-02-28 01:18:14 -0500735 err = 0;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600736 } else {
737 /* Not in cached mode. No need to populate inode with stat */
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000738 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600739 if (IS_ERR(inode)) {
740 err = PTR_ERR(inode);
741 goto error;
742 }
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600743 d_instantiate(dentry, inode);
744 }
745
746error:
747 if (fid)
748 p9_client_clunk(fid);
749
750 return err;
751}
752
753/**
754 * v9fs_vfs_link_dotl - create a hardlink for dotl
755 * @old_dentry: dentry for file to link to
756 * @dir: inode destination for new link
757 * @dentry: dentry for link
758 *
759 */
760
761static int
762v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
763 struct dentry *dentry)
764{
765 int err;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600766 struct dentry *dir_dentry;
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530767 struct p9_fid *dfid, *oldfid;
768 struct v9fs_session_info *v9ses;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600769
Al Viro4b8e9922014-08-19 20:17:38 -0400770 p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
771 dir->i_ino, old_dentry, dentry);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600772
773 v9ses = v9fs_inode2v9ses(dir);
Al Viroaf569592012-04-02 20:02:53 -0400774 dir_dentry = dentry->d_parent;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600775 dfid = v9fs_fid_lookup(dir_dentry);
776 if (IS_ERR(dfid))
777 return PTR_ERR(dfid);
778
779 oldfid = v9fs_fid_lookup(old_dentry);
780 if (IS_ERR(oldfid))
781 return PTR_ERR(oldfid);
782
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600783 err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
784
785 if (err < 0) {
Joe Perches5d385152011-11-28 10:40:46 -0800786 p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600787 return err;
788 }
789
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530790 v9fs_invalidate_inode_attr(dir);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600791 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
792 /* Get the latest stat info from server. */
793 struct p9_fid *fid;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600794 fid = v9fs_fid_lookup(old_dentry);
795 if (IS_ERR(fid))
796 return PTR_ERR(fid);
797
Aneesh Kumar K.Vc06c0662011-02-28 17:04:09 +0530798 v9fs_refresh_inode_dotl(fid, old_dentry->d_inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600799 }
Aneesh Kumar K.V20656a42011-02-28 17:03:55 +0530800 ihold(old_dentry->d_inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600801 d_instantiate(dentry, old_dentry->d_inode);
802
803 return err;
804}
805
806/**
807 * v9fs_vfs_mknod_dotl - create a special file
808 * @dir: inode destination for new link
809 * @dentry: dentry for file
Fabian Frederickfd2916b2014-06-04 16:06:26 -0700810 * @omode: mode for creation
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600811 * @rdev: device associated with special file
812 *
813 */
814static int
Al Viro1a67aaf2011-07-26 01:52:52 -0400815v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600816 dev_t rdev)
817{
818 int err;
Eric W. Biedermand4ef4e32013-01-30 12:08:21 -0800819 kgid_t gid;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600820 char *name;
Al Virod3fb6122011-07-23 18:37:50 -0400821 umode_t mode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600822 struct v9fs_session_info *v9ses;
823 struct p9_fid *fid = NULL, *dfid = NULL;
824 struct inode *inode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600825 struct p9_qid qid;
826 struct dentry *dir_dentry;
827 struct posix_acl *dacl = NULL, *pacl = NULL;
828
Linus Torvalds609eac12012-01-10 15:09:01 -0800829 p9_debug(P9_DEBUG_VFS, " %lu,%s mode: %hx MAJOR: %u MINOR: %u\n",
Joe Perches5d385152011-11-28 10:40:46 -0800830 dir->i_ino, dentry->d_name.name, omode,
831 MAJOR(rdev), MINOR(rdev));
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600832
833 if (!new_valid_dev(rdev))
834 return -EINVAL;
835
836 v9ses = v9fs_inode2v9ses(dir);
Al Viroaf569592012-04-02 20:02:53 -0400837 dir_dentry = dentry->d_parent;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600838 dfid = v9fs_fid_lookup(dir_dentry);
839 if (IS_ERR(dfid)) {
840 err = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800841 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600842 dfid = NULL;
843 goto error;
844 }
845
846 gid = v9fs_get_fsgid_for_create(dir);
847 mode = omode;
848 /* Update mode based on ACL value */
849 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
850 if (err) {
Joe Perches5d385152011-11-28 10:40:46 -0800851 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
852 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600853 goto error;
854 }
855 name = (char *) dentry->d_name.name;
856
857 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
858 if (err < 0)
859 goto error;
860
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530861 v9fs_invalidate_inode_attr(dir);
Al Viro3592ac42013-01-31 13:45:39 -0500862 fid = p9_client_walk(dfid, 1, &name, 1);
863 if (IS_ERR(fid)) {
864 err = PTR_ERR(fid);
865 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
866 err);
867 fid = NULL;
868 goto error;
869 }
870
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600871 /* instantiate inode and assign the unopened fid to the dentry */
872 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530873 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600874 if (IS_ERR(inode)) {
875 err = PTR_ERR(inode);
Joe Perches5d385152011-11-28 10:40:46 -0800876 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
877 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600878 goto error;
879 }
Al Viro3592ac42013-01-31 13:45:39 -0500880 v9fs_set_create_acl(inode, fid, dacl, pacl);
Al Viro2ea03e1d2013-02-28 01:18:14 -0500881 v9fs_fid_add(dentry, fid);
Aneesh Kumar K.V5441ae52011-07-25 18:06:32 +0000882 d_instantiate(dentry, inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600883 fid = NULL;
Al Viro2ea03e1d2013-02-28 01:18:14 -0500884 err = 0;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600885 } else {
886 /*
887 * Not in cached mode. No need to populate inode with stat.
888 * socket syscall returns a fd, so we need instantiate
889 */
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000890 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600891 if (IS_ERR(inode)) {
892 err = PTR_ERR(inode);
893 goto error;
894 }
Al Viro3592ac42013-01-31 13:45:39 -0500895 v9fs_set_create_acl(inode, fid, dacl, pacl);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600896 d_instantiate(dentry, inode);
897 }
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600898error:
899 if (fid)
900 p9_client_clunk(fid);
Al Viro5fa63002013-01-31 13:31:23 -0500901 v9fs_put_acl(dacl, pacl);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600902 return err;
903}
904
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600905/**
906 * v9fs_vfs_follow_link_dotl - follow a symlink path
907 * @dentry: dentry for symlink
908 * @nd: nameidata
909 *
910 */
911
912static void *
913v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd)
914{
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530915 int retval;
916 struct p9_fid *fid;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600917 char *link = __getname();
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530918 char *target;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600919
Al Viro4b8e9922014-08-19 20:17:38 -0400920 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600921
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530922 if (!link) {
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600923 link = ERR_PTR(-ENOMEM);
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530924 goto ndset;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600925 }
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530926 fid = v9fs_fid_lookup(dentry);
927 if (IS_ERR(fid)) {
928 __putname(link);
Aneesh Kumar K.V936bb2d2011-03-24 23:04:41 +0530929 link = ERR_CAST(fid);
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530930 goto ndset;
931 }
932 retval = p9_client_readlink(fid, &target);
933 if (!retval) {
934 strcpy(link, target);
935 kfree(target);
936 goto ndset;
937 }
938 __putname(link);
939 link = ERR_PTR(retval);
940ndset:
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600941 nd_set_link(nd, link);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600942 return NULL;
943}
944
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530945int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
946{
947 loff_t i_size;
948 struct p9_stat_dotl *st;
949 struct v9fs_session_info *v9ses;
950
951 v9ses = v9fs_inode2v9ses(inode);
952 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
953 if (IS_ERR(st))
954 return PTR_ERR(st);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000955 /*
956 * Don't update inode if the file type is different
957 */
958 if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
959 goto out;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530960
961 spin_lock(&inode->i_lock);
962 /*
963 * We don't want to refresh inode->i_size,
964 * because we may have cached data
965 */
966 i_size = inode->i_size;
967 v9fs_stat2inode_dotl(st, inode);
Dominique Martinetfb89b452014-01-10 13:44:09 +0100968 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530969 inode->i_size = i_size;
970 spin_unlock(&inode->i_lock);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000971out:
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530972 kfree(st);
973 return 0;
974}
975
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600976const struct inode_operations v9fs_dir_inode_operations_dotl = {
977 .create = v9fs_vfs_create_dotl,
Miklos Szeredie43ae792012-06-05 15:10:26 +0200978 .atomic_open = v9fs_vfs_atomic_open_dotl,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600979 .lookup = v9fs_vfs_lookup,
980 .link = v9fs_vfs_link_dotl,
981 .symlink = v9fs_vfs_symlink_dotl,
982 .unlink = v9fs_vfs_unlink,
983 .mkdir = v9fs_vfs_mkdir_dotl,
984 .rmdir = v9fs_vfs_rmdir,
985 .mknod = v9fs_vfs_mknod_dotl,
986 .rename = v9fs_vfs_rename,
987 .getattr = v9fs_vfs_getattr_dotl,
988 .setattr = v9fs_vfs_setattr_dotl,
989 .setxattr = generic_setxattr,
990 .getxattr = generic_getxattr,
991 .removexattr = generic_removexattr,
992 .listxattr = v9fs_listxattr,
Christoph Hellwig4e34e712011-07-23 17:37:31 +0200993 .get_acl = v9fs_iop_get_acl,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600994};
995
996const struct inode_operations v9fs_file_inode_operations_dotl = {
997 .getattr = v9fs_vfs_getattr_dotl,
998 .setattr = v9fs_vfs_setattr_dotl,
999 .setxattr = generic_setxattr,
1000 .getxattr = generic_getxattr,
1001 .removexattr = generic_removexattr,
1002 .listxattr = v9fs_listxattr,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001003 .get_acl = v9fs_iop_get_acl,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -06001004};
1005
1006const struct inode_operations v9fs_symlink_inode_operations_dotl = {
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +05301007 .readlink = generic_readlink,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -06001008 .follow_link = v9fs_vfs_follow_link_dotl,
1009 .put_link = v9fs_vfs_put_link,
1010 .getattr = v9fs_vfs_getattr_dotl,
1011 .setattr = v9fs_vfs_setattr_dotl,
1012 .setxattr = generic_setxattr,
1013 .getxattr = generic_getxattr,
1014 .removexattr = generic_removexattr,
1015 .listxattr = v9fs_listxattr,
1016};