blob: eeabcb0bad1255085c2d487785ebb92f638f00b0 [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:
Al Viro0a73d0a2015-07-12 10:34:29 -0400152 iget_failed(inode);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530153 return ERR_PTR(retval);
154
155}
156
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600157struct inode *
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530158v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530159 struct super_block *sb, int new)
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600160{
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600161 struct p9_stat_dotl *st;
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530162 struct inode *inode = NULL;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600163
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000164 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600165 if (IS_ERR(st))
166 return ERR_CAST(st);
167
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530168 inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600169 kfree(st);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530170 return inode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600171}
172
Aneesh Kumar K.Vf88657c2011-08-03 19:55:32 +0530173struct dotl_openflag_map {
174 int open_flag;
175 int dotl_flag;
176};
177
178static int v9fs_mapped_dotl_flags(int flags)
179{
180 int i;
181 int rflags = 0;
182 struct dotl_openflag_map dotl_oflag_map[] = {
183 { O_CREAT, P9_DOTL_CREATE },
184 { O_EXCL, P9_DOTL_EXCL },
185 { O_NOCTTY, P9_DOTL_NOCTTY },
Aneesh Kumar K.Vf88657c2011-08-03 19:55:32 +0530186 { O_APPEND, P9_DOTL_APPEND },
187 { O_NONBLOCK, P9_DOTL_NONBLOCK },
188 { O_DSYNC, P9_DOTL_DSYNC },
189 { FASYNC, P9_DOTL_FASYNC },
190 { O_DIRECT, P9_DOTL_DIRECT },
191 { O_LARGEFILE, P9_DOTL_LARGEFILE },
192 { O_DIRECTORY, P9_DOTL_DIRECTORY },
193 { O_NOFOLLOW, P9_DOTL_NOFOLLOW },
194 { O_NOATIME, P9_DOTL_NOATIME },
195 { O_CLOEXEC, P9_DOTL_CLOEXEC },
196 { O_SYNC, P9_DOTL_SYNC},
197 };
198 for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
199 if (flags & dotl_oflag_map[i].open_flag)
200 rflags |= dotl_oflag_map[i].dotl_flag;
201 }
202 return rflags;
203}
204
205/**
206 * v9fs_open_to_dotl_flags- convert Linux specific open flags to
207 * plan 9 open flag.
208 * @flags: flags to convert
209 */
210int v9fs_open_to_dotl_flags(int flags)
211{
212 int rflags = 0;
213
214 /*
215 * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
216 * and P9_DOTL_NOACCESS
217 */
218 rflags |= flags & O_ACCMODE;
219 rflags |= v9fs_mapped_dotl_flags(flags);
220
221 return rflags;
222}
223
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600224/**
225 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
226 * @dir: directory inode that is being created
227 * @dentry: dentry that is being deleted
Fabian Frederickfd2916b2014-06-04 16:06:26 -0700228 * @omode: create permissions
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600229 *
230 */
231
232static int
Al Viro4acdaf22011-07-26 01:42:34 -0400233v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
Al Viroebfc3b42012-06-10 18:05:36 -0400234 bool excl)
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600235{
Miklos Szeredie43ae792012-06-05 15:10:26 +0200236 return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
237}
238
Al Virod9585272012-06-22 12:39:14 +0400239static int
Miklos Szeredie43ae792012-06-05 15:10:26 +0200240v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
Al Viro30d90492012-06-22 12:40:19 +0400241 struct file *file, unsigned flags, umode_t omode,
Al Viro47237682012-06-10 05:01:45 -0400242 int *opened)
Miklos Szeredie43ae792012-06-05 15:10:26 +0200243{
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600244 int err = 0;
Eric W. Biedermand4ef4e32013-01-30 12:08:21 -0800245 kgid_t gid;
Al Virod3fb6122011-07-23 18:37:50 -0400246 umode_t mode;
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530247 char *name = NULL;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600248 struct p9_qid qid;
249 struct inode *inode;
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530250 struct p9_fid *fid = NULL;
251 struct v9fs_inode *v9inode;
252 struct p9_fid *dfid, *ofid, *inode_fid;
253 struct v9fs_session_info *v9ses;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600254 struct posix_acl *pacl = NULL, *dacl = NULL;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200255 struct dentry *res = NULL;
256
Al Viro00699ad2016-07-05 09:44:53 -0400257 if (d_in_lookup(dentry)) {
Al Viro00cd8dd2012-06-10 17:13:09 -0400258 res = v9fs_vfs_lookup(dir, dentry, 0);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200259 if (IS_ERR(res))
Al Virod9585272012-06-22 12:39:14 +0400260 return PTR_ERR(res);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200261
262 if (res)
263 dentry = res;
264 }
265
266 /* Only creates */
David Howells2b0143b2015-03-17 22:25:59 +0000267 if (!(flags & O_CREAT) || d_really_is_positive(dentry))
M. Mohan Kumarb6f4bee2013-02-05 14:25:05 +0530268 return finish_no_open(file, res);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600269
270 v9ses = v9fs_inode2v9ses(dir);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600271
272 name = (char *) dentry->d_name.name;
Linus Torvalds609eac12012-01-10 15:09:01 -0800273 p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%hx\n",
Joe Perches5d385152011-11-28 10:40:46 -0800274 name, flags, omode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600275
Al Viro77d5a6b2016-05-29 15:29:26 -0400276 dfid = v9fs_parent_fid(dentry);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600277 if (IS_ERR(dfid)) {
278 err = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800279 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
Al Virod9585272012-06-22 12:39:14 +0400280 goto out;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600281 }
282
283 /* clone a fid to use for creation */
Al Viro7d50a292016-08-03 11:12:12 -0400284 ofid = clone_fid(dfid);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600285 if (IS_ERR(ofid)) {
286 err = PTR_ERR(ofid);
Joe Perches5d385152011-11-28 10:40:46 -0800287 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
Al Virod9585272012-06-22 12:39:14 +0400288 goto out;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600289 }
290
291 gid = v9fs_get_fsgid_for_create(dir);
292
293 mode = omode;
294 /* Update mode based on ACL value */
295 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
296 if (err) {
Joe Perches5d385152011-11-28 10:40:46 -0800297 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n",
298 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600299 goto error;
300 }
Aneesh Kumar K.Vf88657c2011-08-03 19:55:32 +0530301 err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags),
302 mode, gid, &qid);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600303 if (err < 0) {
Joe Perches5d385152011-11-28 10:40:46 -0800304 p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n",
305 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600306 goto error;
307 }
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530308 v9fs_invalidate_inode_attr(dir);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600309
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600310 /* instantiate inode and assign the unopened fid to the dentry */
311 fid = p9_client_walk(dfid, 1, &name, 1);
312 if (IS_ERR(fid)) {
313 err = PTR_ERR(fid);
Joe Perches5d385152011-11-28 10:40:46 -0800314 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600315 fid = NULL;
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600316 goto error;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600317 }
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530318 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600319 if (IS_ERR(inode)) {
320 err = PTR_ERR(inode);
Joe Perches5d385152011-11-28 10:40:46 -0800321 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600322 goto error;
323 }
Al Viro3592ac42013-01-31 13:45:39 -0500324 /* Now set the ACL based on the default value */
325 v9fs_set_create_acl(inode, fid, dacl, pacl);
326
Al Viro2ea03e1d2013-02-28 01:18:14 -0500327 v9fs_fid_add(dentry, fid);
Aneesh Kumar K.V5441ae52011-07-25 18:06:32 +0000328 d_instantiate(dentry, inode);
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600329
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530330 v9inode = V9FS_I(inode);
Aneesh Kumar K.V5a7e0a82011-03-08 16:39:46 +0530331 mutex_lock(&v9inode->v_mutex);
Dominique Martinetfb89b452014-01-10 13:44:09 +0100332 if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
333 !v9inode->writeback_fid &&
Aneesh Kumar K.V7add6972011-03-08 16:39:49 +0530334 ((flags & O_ACCMODE) != O_RDONLY)) {
Aneesh Kumar K.V3cf387d2011-02-28 17:03:57 +0530335 /*
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530336 * clone a fid and add it to writeback_fid
Aneesh Kumar K.V3cf387d2011-02-28 17:03:57 +0530337 * we do it during open time instead of
338 * page dirty time via write_begin/page_mkwrite
339 * because we want write after unlink usecase
340 * to work.
341 */
342 inode_fid = v9fs_writeback_fid(dentry);
343 if (IS_ERR(inode_fid)) {
344 err = PTR_ERR(inode_fid);
Aneesh Kumar K.V5a7e0a82011-03-08 16:39:46 +0530345 mutex_unlock(&v9inode->v_mutex);
Aneesh Kumar K.V398c4f02011-05-20 18:55:51 +0000346 goto err_clunk_old_fid;
Aneesh Kumar K.V3cf387d2011-02-28 17:03:57 +0530347 }
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530348 v9inode->writeback_fid = (void *) inode_fid;
Aneesh Kumar K.V3cf387d2011-02-28 17:03:57 +0530349 }
Aneesh Kumar K.V5a7e0a82011-03-08 16:39:46 +0530350 mutex_unlock(&v9inode->v_mutex);
Aneesh Kumar K.Vaf7542f2011-01-10 14:22:21 -0600351 /* Since we are opening a file, assign the open fid to the file */
Al Viro30d90492012-06-22 12:40:19 +0400352 err = finish_open(file, dentry, generic_file_open, opened);
353 if (err)
Aneesh Kumar K.V398c4f02011-05-20 18:55:51 +0000354 goto err_clunk_old_fid;
Al Viro30d90492012-06-22 12:40:19 +0400355 file->private_data = ofid;
Dominique Martinetfb89b452014-01-10 13:44:09 +0100356 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
Al Viro30d90492012-06-22 12:40:19 +0400357 v9fs_cache_inode_set_cookie(inode, file);
Al Viro47237682012-06-10 05:01:45 -0400358 *opened |= FILE_CREATED;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200359out:
Al Viro5fa63002013-01-31 13:31:23 -0500360 v9fs_put_acl(dacl, pacl);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200361 dput(res);
Al Virod9585272012-06-22 12:39:14 +0400362 return err;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600363
364error:
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600365 if (fid)
366 p9_client_clunk(fid);
Aneesh Kumar K.V398c4f02011-05-20 18:55:51 +0000367err_clunk_old_fid:
368 if (ofid)
369 p9_client_clunk(ofid);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200370 goto out;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600371}
372
373/**
374 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
375 * @dir: inode that is being unlinked
376 * @dentry: dentry that is being unlinked
Fabian Frederickfd2916b2014-06-04 16:06:26 -0700377 * @omode: mode for new directory
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600378 *
379 */
380
381static int v9fs_vfs_mkdir_dotl(struct inode *dir,
Al Viro18bb1db2011-07-26 01:41:39 -0400382 struct dentry *dentry, umode_t omode)
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600383{
384 int err;
385 struct v9fs_session_info *v9ses;
386 struct p9_fid *fid = NULL, *dfid = NULL;
Eric W. Biedermand4ef4e32013-01-30 12:08:21 -0800387 kgid_t gid;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600388 char *name;
Al Virod3fb6122011-07-23 18:37:50 -0400389 umode_t mode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600390 struct inode *inode;
391 struct p9_qid qid;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600392 struct posix_acl *dacl = NULL, *pacl = NULL;
393
Al Viro4b8e9922014-08-19 20:17:38 -0400394 p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600395 err = 0;
396 v9ses = v9fs_inode2v9ses(dir);
397
398 omode |= S_IFDIR;
399 if (dir->i_mode & S_ISGID)
400 omode |= S_ISGID;
401
Al Viro77d5a6b2016-05-29 15:29:26 -0400402 dfid = v9fs_parent_fid(dentry);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600403 if (IS_ERR(dfid)) {
404 err = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800405 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600406 dfid = NULL;
407 goto error;
408 }
409
410 gid = v9fs_get_fsgid_for_create(dir);
411 mode = omode;
412 /* Update mode based on ACL value */
413 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
414 if (err) {
Joe Perches5d385152011-11-28 10:40:46 -0800415 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
416 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600417 goto error;
418 }
419 name = (char *) dentry->d_name.name;
420 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
421 if (err < 0)
422 goto error;
423
Al Viro3592ac42013-01-31 13:45:39 -0500424 fid = p9_client_walk(dfid, 1, &name, 1);
425 if (IS_ERR(fid)) {
426 err = PTR_ERR(fid);
427 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
428 err);
429 fid = NULL;
430 goto error;
431 }
432
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600433 /* instantiate inode and assign the unopened fid to the dentry */
434 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530435 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600436 if (IS_ERR(inode)) {
437 err = PTR_ERR(inode);
Joe Perches5d385152011-11-28 10:40:46 -0800438 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
439 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600440 goto error;
441 }
Al Viro2ea03e1d2013-02-28 01:18:14 -0500442 v9fs_fid_add(dentry, fid);
Al Viro3592ac42013-01-31 13:45:39 -0500443 v9fs_set_create_acl(inode, fid, dacl, pacl);
Aneesh Kumar K.V5441ae52011-07-25 18:06:32 +0000444 d_instantiate(dentry, inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600445 fid = NULL;
Al Viro2ea03e1d2013-02-28 01:18:14 -0500446 err = 0;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600447 } else {
448 /*
449 * Not in cached mode. No need to populate
450 * inode with stat. We need to get an inode
451 * so that we can set the acl with dentry
452 */
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000453 inode = v9fs_get_inode(dir->i_sb, mode, 0);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600454 if (IS_ERR(inode)) {
455 err = PTR_ERR(inode);
456 goto error;
457 }
Al Viro3592ac42013-01-31 13:45:39 -0500458 v9fs_set_create_acl(inode, fid, dacl, pacl);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600459 d_instantiate(dentry, inode);
460 }
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530461 inc_nlink(dir);
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530462 v9fs_invalidate_inode_attr(dir);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600463error:
464 if (fid)
465 p9_client_clunk(fid);
Al Viro5fa63002013-01-31 13:31:23 -0500466 v9fs_put_acl(dacl, pacl);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600467 return err;
468}
469
470static int
471v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
472 struct kstat *stat)
473{
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600474 struct v9fs_session_info *v9ses;
475 struct p9_fid *fid;
476 struct p9_stat_dotl *st;
477
Joe Perches5d385152011-11-28 10:40:46 -0800478 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
Aneesh Kumar K.V42869c82011-03-08 16:39:50 +0530479 v9ses = v9fs_dentry2v9ses(dentry);
Aneesh Kumar K.Va1211902011-02-28 17:04:01 +0530480 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
David Howells2b0143b2015-03-17 22:25:59 +0000481 generic_fillattr(d_inode(dentry), stat);
Aneesh Kumar K.Va1211902011-02-28 17:04:01 +0530482 return 0;
483 }
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600484 fid = v9fs_fid_lookup(dentry);
485 if (IS_ERR(fid))
486 return PTR_ERR(fid);
487
488 /* Ask for all the fields in stat structure. Server will return
489 * whatever it supports
490 */
491
492 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
493 if (IS_ERR(st))
494 return PTR_ERR(st);
495
David Howells2b0143b2015-03-17 22:25:59 +0000496 v9fs_stat2inode_dotl(st, d_inode(dentry));
497 generic_fillattr(d_inode(dentry), stat);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600498 /* Change block size to what the server returned */
499 stat->blksize = st->st_blksize;
500
501 kfree(st);
502 return 0;
503}
504
Aneesh Kumar K.Vf7666192011-12-18 23:03:13 +0530505/*
506 * Attribute flags.
507 */
508#define P9_ATTR_MODE (1 << 0)
509#define P9_ATTR_UID (1 << 1)
510#define P9_ATTR_GID (1 << 2)
511#define P9_ATTR_SIZE (1 << 3)
512#define P9_ATTR_ATIME (1 << 4)
513#define P9_ATTR_MTIME (1 << 5)
514#define P9_ATTR_CTIME (1 << 6)
515#define P9_ATTR_ATIME_SET (1 << 7)
516#define P9_ATTR_MTIME_SET (1 << 8)
517
518struct dotl_iattr_map {
519 int iattr_valid;
520 int p9_iattr_valid;
521};
522
523static int v9fs_mapped_iattr_valid(int iattr_valid)
524{
525 int i;
526 int p9_iattr_valid = 0;
527 struct dotl_iattr_map dotl_iattr_map[] = {
528 { ATTR_MODE, P9_ATTR_MODE },
529 { ATTR_UID, P9_ATTR_UID },
530 { ATTR_GID, P9_ATTR_GID },
531 { ATTR_SIZE, P9_ATTR_SIZE },
532 { ATTR_ATIME, P9_ATTR_ATIME },
533 { ATTR_MTIME, P9_ATTR_MTIME },
534 { ATTR_CTIME, P9_ATTR_CTIME },
535 { ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
536 { ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
537 };
538 for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
539 if (iattr_valid & dotl_iattr_map[i].iattr_valid)
540 p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
541 }
542 return p9_iattr_valid;
543}
544
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600545/**
546 * v9fs_vfs_setattr_dotl - set file metadata
547 * @dentry: file whose metadata to set
548 * @iattr: metadata assignment structure
549 *
550 */
551
552int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
553{
554 int retval;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600555 struct p9_fid *fid;
556 struct p9_iattr_dotl p9attr;
David Howells2b0143b2015-03-17 22:25:59 +0000557 struct inode *inode = d_inode(dentry);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600558
Joe Perches5d385152011-11-28 10:40:46 -0800559 p9_debug(P9_DEBUG_VFS, "\n");
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600560
Al Virobe308f02013-01-31 12:58:16 -0500561 retval = inode_change_ok(inode, iattr);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600562 if (retval)
563 return retval;
564
Aneesh Kumar K.Vf7666192011-12-18 23:03:13 +0530565 p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600566 p9attr.mode = iattr->ia_mode;
567 p9attr.uid = iattr->ia_uid;
568 p9attr.gid = iattr->ia_gid;
569 p9attr.size = iattr->ia_size;
570 p9attr.atime_sec = iattr->ia_atime.tv_sec;
571 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
572 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
573 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
574
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600575 fid = v9fs_fid_lookup(dentry);
576 if (IS_ERR(fid))
577 return PTR_ERR(fid);
578
Aneesh Kumar K.V3dc54362011-02-28 17:04:11 +0530579 /* Write all dirty data */
Al Virobe308f02013-01-31 12:58:16 -0500580 if (S_ISREG(inode->i_mode))
581 filemap_write_and_wait(inode->i_mapping);
Aneesh Kumar K.V3dc54362011-02-28 17:04:11 +0530582
Aneesh Kumar K.Vf10fc502011-02-28 17:04:10 +0530583 retval = p9_client_setattr(fid, &p9attr);
584 if (retval < 0)
585 return retval;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600586
Aneesh Kumar K.V059c1382011-03-08 16:39:48 +0530587 if ((iattr->ia_valid & ATTR_SIZE) &&
Al Virobe308f02013-01-31 12:58:16 -0500588 iattr->ia_size != i_size_read(inode))
589 truncate_setsize(inode, iattr->ia_size);
Aneesh Kumar K.V059c1382011-03-08 16:39:48 +0530590
Al Virobe308f02013-01-31 12:58:16 -0500591 v9fs_invalidate_inode_attr(inode);
592 setattr_copy(inode, iattr);
593 mark_inode_dirty(inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600594 if (iattr->ia_valid & ATTR_MODE) {
595 /* We also want to update ACL when we update mode bits */
Al Virobe308f02013-01-31 12:58:16 -0500596 retval = v9fs_acl_chmod(inode, fid);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600597 if (retval < 0)
598 return retval;
599 }
600 return 0;
601}
602
603/**
604 * v9fs_stat2inode_dotl - populate an inode structure with stat info
605 * @stat: stat structure
606 * @inode: inode to populate
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600607 *
608 */
609
610void
611v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
612{
Al Viro3eda0de2011-07-26 02:53:22 -0400613 umode_t mode;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530614 struct v9fs_inode *v9inode = V9FS_I(inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600615
616 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
617 inode->i_atime.tv_sec = stat->st_atime_sec;
618 inode->i_atime.tv_nsec = stat->st_atime_nsec;
619 inode->i_mtime.tv_sec = stat->st_mtime_sec;
620 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
621 inode->i_ctime.tv_sec = stat->st_ctime_sec;
622 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
623 inode->i_uid = stat->st_uid;
624 inode->i_gid = stat->st_gid;
Miklos Szeredibfe86842011-10-28 14:13:29 +0200625 set_nlink(inode, stat->st_nlink);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600626
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000627 mode = stat->st_mode & S_IALLUGO;
628 mode |= inode->i_mode & ~S_IALLUGO;
629 inode->i_mode = mode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600630
631 i_size_write(inode, stat->st_size);
632 inode->i_blocks = stat->st_blocks;
633 } else {
634 if (stat->st_result_mask & P9_STATS_ATIME) {
635 inode->i_atime.tv_sec = stat->st_atime_sec;
636 inode->i_atime.tv_nsec = stat->st_atime_nsec;
637 }
638 if (stat->st_result_mask & P9_STATS_MTIME) {
639 inode->i_mtime.tv_sec = stat->st_mtime_sec;
640 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
641 }
642 if (stat->st_result_mask & P9_STATS_CTIME) {
643 inode->i_ctime.tv_sec = stat->st_ctime_sec;
644 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
645 }
646 if (stat->st_result_mask & P9_STATS_UID)
647 inode->i_uid = stat->st_uid;
648 if (stat->st_result_mask & P9_STATS_GID)
649 inode->i_gid = stat->st_gid;
650 if (stat->st_result_mask & P9_STATS_NLINK)
Miklos Szeredibfe86842011-10-28 14:13:29 +0200651 set_nlink(inode, stat->st_nlink);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600652 if (stat->st_result_mask & P9_STATS_MODE) {
653 inode->i_mode = stat->st_mode;
654 if ((S_ISBLK(inode->i_mode)) ||
655 (S_ISCHR(inode->i_mode)))
656 init_special_inode(inode, inode->i_mode,
657 inode->i_rdev);
658 }
659 if (stat->st_result_mask & P9_STATS_RDEV)
660 inode->i_rdev = new_decode_dev(stat->st_rdev);
661 if (stat->st_result_mask & P9_STATS_SIZE)
662 i_size_write(inode, stat->st_size);
663 if (stat->st_result_mask & P9_STATS_BLOCKS)
664 inode->i_blocks = stat->st_blocks;
665 }
666 if (stat->st_result_mask & P9_STATS_GEN)
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000667 inode->i_generation = stat->st_gen;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600668
669 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
670 * because the inode structure does not have fields for them.
671 */
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530672 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600673}
674
675static int
676v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
677 const char *symname)
678{
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600679 int err;
Eric W. Biedermand4ef4e32013-01-30 12:08:21 -0800680 kgid_t gid;
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530681 char *name;
682 struct p9_qid qid;
683 struct inode *inode;
684 struct p9_fid *dfid;
685 struct p9_fid *fid = NULL;
686 struct v9fs_session_info *v9ses;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600687
688 name = (char *) dentry->d_name.name;
Joe Perches5d385152011-11-28 10:40:46 -0800689 p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600690 v9ses = v9fs_inode2v9ses(dir);
691
Al Viro77d5a6b2016-05-29 15:29:26 -0400692 dfid = v9fs_parent_fid(dentry);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600693 if (IS_ERR(dfid)) {
694 err = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800695 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600696 return err;
697 }
698
699 gid = v9fs_get_fsgid_for_create(dir);
700
701 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
702 err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid);
703
704 if (err < 0) {
Joe Perches5d385152011-11-28 10:40:46 -0800705 p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600706 goto error;
707 }
708
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530709 v9fs_invalidate_inode_attr(dir);
Dominique Martinetfb89b452014-01-10 13:44:09 +0100710 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600711 /* Now walk from the parent so we can get an unopened fid. */
712 fid = p9_client_walk(dfid, 1, &name, 1);
713 if (IS_ERR(fid)) {
714 err = PTR_ERR(fid);
Joe Perches5d385152011-11-28 10:40:46 -0800715 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
716 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600717 fid = NULL;
718 goto error;
719 }
720
721 /* instantiate inode and assign the unopened fid to dentry */
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530722 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600723 if (IS_ERR(inode)) {
724 err = PTR_ERR(inode);
Joe Perches5d385152011-11-28 10:40:46 -0800725 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
726 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600727 goto error;
728 }
Al Viro2ea03e1d2013-02-28 01:18:14 -0500729 v9fs_fid_add(dentry, fid);
Aneesh Kumar K.V5441ae52011-07-25 18:06:32 +0000730 d_instantiate(dentry, inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600731 fid = NULL;
Al Viro2ea03e1d2013-02-28 01:18:14 -0500732 err = 0;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600733 } else {
734 /* Not in cached mode. No need to populate inode with stat */
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000735 inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600736 if (IS_ERR(inode)) {
737 err = PTR_ERR(inode);
738 goto error;
739 }
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600740 d_instantiate(dentry, inode);
741 }
742
743error:
744 if (fid)
745 p9_client_clunk(fid);
746
747 return err;
748}
749
750/**
751 * v9fs_vfs_link_dotl - create a hardlink for dotl
752 * @old_dentry: dentry for file to link to
753 * @dir: inode destination for new link
754 * @dentry: dentry for link
755 *
756 */
757
758static int
759v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
760 struct dentry *dentry)
761{
762 int err;
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530763 struct p9_fid *dfid, *oldfid;
764 struct v9fs_session_info *v9ses;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600765
Al Viro4b8e9922014-08-19 20:17:38 -0400766 p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
767 dir->i_ino, old_dentry, dentry);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600768
769 v9ses = v9fs_inode2v9ses(dir);
Al Viro77d5a6b2016-05-29 15:29:26 -0400770 dfid = v9fs_parent_fid(dentry);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600771 if (IS_ERR(dfid))
772 return PTR_ERR(dfid);
773
774 oldfid = v9fs_fid_lookup(old_dentry);
775 if (IS_ERR(oldfid))
776 return PTR_ERR(oldfid);
777
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600778 err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
779
780 if (err < 0) {
Joe Perches5d385152011-11-28 10:40:46 -0800781 p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600782 return err;
783 }
784
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530785 v9fs_invalidate_inode_attr(dir);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600786 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
787 /* Get the latest stat info from server. */
788 struct p9_fid *fid;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600789 fid = v9fs_fid_lookup(old_dentry);
790 if (IS_ERR(fid))
791 return PTR_ERR(fid);
792
David Howells2b0143b2015-03-17 22:25:59 +0000793 v9fs_refresh_inode_dotl(fid, d_inode(old_dentry));
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600794 }
David Howells2b0143b2015-03-17 22:25:59 +0000795 ihold(d_inode(old_dentry));
796 d_instantiate(dentry, d_inode(old_dentry));
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600797
798 return err;
799}
800
801/**
802 * v9fs_vfs_mknod_dotl - create a special file
803 * @dir: inode destination for new link
804 * @dentry: dentry for file
Fabian Frederickfd2916b2014-06-04 16:06:26 -0700805 * @omode: mode for creation
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600806 * @rdev: device associated with special file
807 *
808 */
809static int
Al Viro1a67aaf2011-07-26 01:52:52 -0400810v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600811 dev_t rdev)
812{
813 int err;
Eric W. Biedermand4ef4e32013-01-30 12:08:21 -0800814 kgid_t gid;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600815 char *name;
Al Virod3fb6122011-07-23 18:37:50 -0400816 umode_t mode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600817 struct v9fs_session_info *v9ses;
818 struct p9_fid *fid = NULL, *dfid = NULL;
819 struct inode *inode;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600820 struct p9_qid qid;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600821 struct posix_acl *dacl = NULL, *pacl = NULL;
822
Al Viroa4555892014-10-21 20:11:25 -0400823 p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n",
824 dir->i_ino, dentry, omode,
Joe Perches5d385152011-11-28 10:40:46 -0800825 MAJOR(rdev), MINOR(rdev));
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600826
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600827 v9ses = v9fs_inode2v9ses(dir);
Al Viro77d5a6b2016-05-29 15:29:26 -0400828 dfid = v9fs_parent_fid(dentry);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600829 if (IS_ERR(dfid)) {
830 err = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800831 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600832 dfid = NULL;
833 goto error;
834 }
835
836 gid = v9fs_get_fsgid_for_create(dir);
837 mode = omode;
838 /* Update mode based on ACL value */
839 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
840 if (err) {
Joe Perches5d385152011-11-28 10:40:46 -0800841 p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
842 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600843 goto error;
844 }
845 name = (char *) dentry->d_name.name;
846
847 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
848 if (err < 0)
849 goto error;
850
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530851 v9fs_invalidate_inode_attr(dir);
Al Viro3592ac42013-01-31 13:45:39 -0500852 fid = p9_client_walk(dfid, 1, &name, 1);
853 if (IS_ERR(fid)) {
854 err = PTR_ERR(fid);
855 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
856 err);
857 fid = NULL;
858 goto error;
859 }
860
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600861 /* instantiate inode and assign the unopened fid to the dentry */
862 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530863 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600864 if (IS_ERR(inode)) {
865 err = PTR_ERR(inode);
Joe Perches5d385152011-11-28 10:40:46 -0800866 p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
867 err);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600868 goto error;
869 }
Al Viro3592ac42013-01-31 13:45:39 -0500870 v9fs_set_create_acl(inode, fid, dacl, pacl);
Al Viro2ea03e1d2013-02-28 01:18:14 -0500871 v9fs_fid_add(dentry, fid);
Aneesh Kumar K.V5441ae52011-07-25 18:06:32 +0000872 d_instantiate(dentry, inode);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600873 fid = NULL;
Al Viro2ea03e1d2013-02-28 01:18:14 -0500874 err = 0;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600875 } else {
876 /*
877 * Not in cached mode. No need to populate inode with stat.
878 * socket syscall returns a fd, so we need instantiate
879 */
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000880 inode = v9fs_get_inode(dir->i_sb, mode, rdev);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600881 if (IS_ERR(inode)) {
882 err = PTR_ERR(inode);
883 goto error;
884 }
Al Viro3592ac42013-01-31 13:45:39 -0500885 v9fs_set_create_acl(inode, fid, dacl, pacl);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600886 d_instantiate(dentry, inode);
887 }
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600888error:
889 if (fid)
890 p9_client_clunk(fid);
Al Viro5fa63002013-01-31 13:31:23 -0500891 v9fs_put_acl(dacl, pacl);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600892 return err;
893}
894
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600895/**
Al Viro6b255392015-11-17 10:20:54 -0500896 * v9fs_vfs_get_link_dotl - follow a symlink path
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600897 * @dentry: dentry for symlink
Al Viro6b255392015-11-17 10:20:54 -0500898 * @inode: inode for symlink
Al Virofceef392015-12-29 15:58:39 -0500899 * @done: destructor for return value
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600900 */
901
Al Viro680baac2015-05-02 13:32:22 -0400902static const char *
Al Viro6b255392015-11-17 10:20:54 -0500903v9fs_vfs_get_link_dotl(struct dentry *dentry,
Al Virofceef392015-12-29 15:58:39 -0500904 struct inode *inode,
905 struct delayed_call *done)
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600906{
Al Viro6b255392015-11-17 10:20:54 -0500907 struct p9_fid *fid;
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530908 char *target;
Al Viro90e4fc82015-04-14 17:42:49 -0400909 int retval;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600910
Al Viro6b255392015-11-17 10:20:54 -0500911 if (!dentry)
912 return ERR_PTR(-ECHILD);
913
Al Viro4b8e9922014-08-19 20:17:38 -0400914 p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600915
Al Viro6b255392015-11-17 10:20:54 -0500916 fid = v9fs_fid_lookup(dentry);
Al Viro90e4fc82015-04-14 17:42:49 -0400917 if (IS_ERR(fid))
918 return ERR_CAST(fid);
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530919 retval = p9_client_readlink(fid, &target);
Al Viro90e4fc82015-04-14 17:42:49 -0400920 if (retval)
921 return ERR_PTR(retval);
Al Virofceef392015-12-29 15:58:39 -0500922 set_delayed_call(done, kfree_link, target);
923 return target;
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600924}
925
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530926int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
927{
928 loff_t i_size;
929 struct p9_stat_dotl *st;
930 struct v9fs_session_info *v9ses;
931
932 v9ses = v9fs_inode2v9ses(inode);
933 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
934 if (IS_ERR(st))
935 return PTR_ERR(st);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000936 /*
937 * Don't update inode if the file type is different
938 */
939 if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
940 goto out;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530941
942 spin_lock(&inode->i_lock);
943 /*
944 * We don't want to refresh inode->i_size,
945 * because we may have cached data
946 */
947 i_size = inode->i_size;
948 v9fs_stat2inode_dotl(st, inode);
Dominique Martinetfb89b452014-01-10 13:44:09 +0100949 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530950 inode->i_size = i_size;
951 spin_unlock(&inode->i_lock);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000952out:
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530953 kfree(st);
954 return 0;
955}
956
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600957const struct inode_operations v9fs_dir_inode_operations_dotl = {
958 .create = v9fs_vfs_create_dotl,
Miklos Szeredie43ae792012-06-05 15:10:26 +0200959 .atomic_open = v9fs_vfs_atomic_open_dotl,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600960 .lookup = v9fs_vfs_lookup,
961 .link = v9fs_vfs_link_dotl,
962 .symlink = v9fs_vfs_symlink_dotl,
963 .unlink = v9fs_vfs_unlink,
964 .mkdir = v9fs_vfs_mkdir_dotl,
965 .rmdir = v9fs_vfs_rmdir,
966 .mknod = v9fs_vfs_mknod_dotl,
967 .rename = v9fs_vfs_rename,
968 .getattr = v9fs_vfs_getattr_dotl,
969 .setattr = v9fs_vfs_setattr_dotl,
970 .setxattr = generic_setxattr,
971 .getxattr = generic_getxattr,
972 .removexattr = generic_removexattr,
973 .listxattr = v9fs_listxattr,
Christoph Hellwig4e34e712011-07-23 17:37:31 +0200974 .get_acl = v9fs_iop_get_acl,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600975};
976
977const struct inode_operations v9fs_file_inode_operations_dotl = {
978 .getattr = v9fs_vfs_getattr_dotl,
979 .setattr = v9fs_vfs_setattr_dotl,
980 .setxattr = generic_setxattr,
981 .getxattr = generic_getxattr,
982 .removexattr = generic_removexattr,
983 .listxattr = v9fs_listxattr,
Christoph Hellwig4e34e712011-07-23 17:37:31 +0200984 .get_acl = v9fs_iop_get_acl,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600985};
986
987const struct inode_operations v9fs_symlink_inode_operations_dotl = {
M. Mohan Kumar31b6cea2011-01-08 07:28:46 +0530988 .readlink = generic_readlink,
Al Viro6b255392015-11-17 10:20:54 -0500989 .get_link = v9fs_vfs_get_link_dotl,
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600990 .getattr = v9fs_vfs_getattr_dotl,
991 .setattr = v9fs_vfs_setattr_dotl,
992 .setxattr = generic_setxattr,
993 .getxattr = generic_getxattr,
994 .removexattr = generic_removexattr,
995 .listxattr = v9fs_listxattr,
996};