blob: 28a22092d4502709fa6d339c40ac2872aca482fa [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/inode.c
3 *
Steve French2dd29d32007-04-23 22:07:35 +00004 * Copyright (C) International Business Machines Corp., 2002,2007
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/stat.h>
23#include <linux/pagemap.h>
24#include <asm/div64.h>
25#include "cifsfs.h"
26#include "cifspdu.h"
27#include "cifsglob.h"
28#include "cifsproto.h"
29#include "cifs_debug.h"
30#include "cifs_fs_sb.h"
31
Christoph Hellwig70eff552008-02-15 20:55:05 +000032
Igor Mammedov79626702008-03-09 03:44:18 +000033static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral)
Christoph Hellwig70eff552008-02-15 20:55:05 +000034{
35 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
36
37 switch (inode->i_mode & S_IFMT) {
38 case S_IFREG:
39 inode->i_op = &cifs_file_inode_ops;
40 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
41 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
42 inode->i_fop = &cifs_file_direct_nobrl_ops;
43 else
44 inode->i_fop = &cifs_file_direct_ops;
45 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
46 inode->i_fop = &cifs_file_nobrl_ops;
47 else { /* not direct, send byte range locks */
48 inode->i_fop = &cifs_file_ops;
49 }
50
51
52 /* check if server can support readpages */
53 if (cifs_sb->tcon->ses->server->maxBuf <
54 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
55 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
56 else
57 inode->i_data.a_ops = &cifs_addr_ops;
58 break;
59 case S_IFDIR:
Steve Frenchbc5b6e22008-03-11 21:07:48 +000060#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov79626702008-03-09 03:44:18 +000061 if (is_dfs_referral) {
62 inode->i_op = &cifs_dfs_referral_inode_operations;
63 } else {
Steve Frenchbc5b6e22008-03-11 21:07:48 +000064#else /* NO DFS support, treat as a directory */
65 {
66#endif
Igor Mammedov79626702008-03-09 03:44:18 +000067 inode->i_op = &cifs_dir_inode_ops;
68 inode->i_fop = &cifs_dir_ops;
69 }
Christoph Hellwig70eff552008-02-15 20:55:05 +000070 break;
71 case S_IFLNK:
72 inode->i_op = &cifs_symlink_inode_ops;
73 break;
74 default:
75 init_special_inode(inode, inode->i_mode, inode->i_rdev);
76 break;
77 }
78}
79
Christoph Hellwig75f12982008-02-25 20:25:21 +000080static void cifs_unix_info_to_inode(struct inode *inode,
81 FILE_UNIX_BASIC_INFO *info, int force_uid_gid)
82{
83 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
84 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
85 __u64 num_of_bytes = le64_to_cpu(info->NumOfBytes);
86 __u64 end_of_file = le64_to_cpu(info->EndOfFile);
87
88 inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(info->LastAccessTime));
89 inode->i_mtime =
90 cifs_NTtimeToUnix(le64_to_cpu(info->LastModificationTime));
91 inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(info->LastStatusChange));
92 inode->i_mode = le64_to_cpu(info->Permissions);
93
94 /*
95 * Since we set the inode type below we need to mask off
96 * to avoid strange results if bits set above.
97 */
98 inode->i_mode &= ~S_IFMT;
99 switch (le32_to_cpu(info->Type)) {
100 case UNIX_FILE:
101 inode->i_mode |= S_IFREG;
102 break;
103 case UNIX_SYMLINK:
104 inode->i_mode |= S_IFLNK;
105 break;
106 case UNIX_DIR:
107 inode->i_mode |= S_IFDIR;
108 break;
109 case UNIX_CHARDEV:
110 inode->i_mode |= S_IFCHR;
111 inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor),
112 le64_to_cpu(info->DevMinor) & MINORMASK);
113 break;
114 case UNIX_BLOCKDEV:
115 inode->i_mode |= S_IFBLK;
116 inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor),
117 le64_to_cpu(info->DevMinor) & MINORMASK);
118 break;
119 case UNIX_FIFO:
120 inode->i_mode |= S_IFIFO;
121 break;
122 case UNIX_SOCKET:
123 inode->i_mode |= S_IFSOCK;
124 break;
125 default:
126 /* safest to call it a file if we do not know */
127 inode->i_mode |= S_IFREG;
128 cFYI(1, ("unknown type %d", le32_to_cpu(info->Type)));
129 break;
130 }
131
132 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) &&
133 !force_uid_gid)
134 inode->i_uid = cifs_sb->mnt_uid;
135 else
136 inode->i_uid = le64_to_cpu(info->Uid);
137
138 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) &&
139 !force_uid_gid)
140 inode->i_gid = cifs_sb->mnt_gid;
141 else
142 inode->i_gid = le64_to_cpu(info->Gid);
143
144 inode->i_nlink = le64_to_cpu(info->Nlinks);
145
146 spin_lock(&inode->i_lock);
147 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
148 /*
149 * We can not safely change the file size here if the client
150 * is writing to it due to potential races.
151 */
152 i_size_write(inode, end_of_file);
153
154 /*
155 * i_blocks is not related to (i_size / i_blksize),
156 * but instead 512 byte (2**9) size is required for
157 * calculating num blocks.
158 */
159 inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
160 }
161 spin_unlock(&inode->i_lock);
162}
163
Steve Frenchb9a32602008-05-20 21:52:32 +0000164
165/*
166 * Needed to setup inode data for the directory which is the
167 * junction to the new submount (ie to setup the fake directory
168 * which represents a DFS referral)
169 */
Steve French0e4bbde2008-05-20 19:50:46 +0000170static void fill_fake_finddataunix(FILE_UNIX_BASIC_INFO *pfnd_dat,
171 struct super_block *sb)
172{
173 struct inode *pinode = NULL;
174
Dave Jones0a891ad2008-05-22 14:20:21 +0000175 memset(pfnd_dat, 0, sizeof(FILE_UNIX_BASIC_INFO));
Steve French0e4bbde2008-05-20 19:50:46 +0000176
177/* __le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
178 __le64 pfnd_dat->NumOfBytes = cpu_to_le64(0);
179 __u64 UniqueId = 0; */
180 pfnd_dat->LastStatusChange =
181 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
182 pfnd_dat->LastAccessTime =
183 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
184 pfnd_dat->LastModificationTime =
185 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
186 pfnd_dat->Type = cpu_to_le32(UNIX_DIR);
187 pfnd_dat->Permissions = cpu_to_le64(S_IXUGO | S_IRWXU);
188 pfnd_dat->Nlinks = cpu_to_le64(2);
189 if (sb->s_root)
190 pinode = sb->s_root->d_inode;
191 if (pinode == NULL)
192 return;
193
194 /* fill in default values for the remaining based on root
195 inode since we can not query the server for this inode info */
196 pfnd_dat->DevMajor = cpu_to_le64(MAJOR(pinode->i_rdev));
197 pfnd_dat->DevMinor = cpu_to_le64(MINOR(pinode->i_rdev));
198 pfnd_dat->Uid = cpu_to_le64(pinode->i_uid);
199 pfnd_dat->Gid = cpu_to_le64(pinode->i_gid);
200}
201
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202int cifs_get_inode_info_unix(struct inode **pinode,
Steve French646dd532008-05-15 01:50:56 +0000203 const unsigned char *full_path, struct super_block *sb, int xid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204{
205 int rc = 0;
Steve French0e4bbde2008-05-20 19:50:46 +0000206 FILE_UNIX_BASIC_INFO find_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 struct cifsTconInfo *pTcon;
208 struct inode *inode;
209 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Igor Mammedov79626702008-03-09 03:44:18 +0000210 bool is_dfs_referral = false;
Steve French0e4bbde2008-05-20 19:50:46 +0000211 struct cifsInodeInfo *cifsInfo;
212 __u64 num_of_bytes;
213 __u64 end_of_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
215 pTcon = cifs_sb->tcon;
Steve French646dd532008-05-15 01:50:56 +0000216 cFYI(1, ("Getting info on %s", full_path));
Igor Mammedov79626702008-03-09 03:44:18 +0000217
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 /* could have done a find first instead but this returns more info */
Steve French0e4bbde2008-05-20 19:50:46 +0000219 rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &find_data,
Steve French737b7582005-04-28 22:41:06 -0700220 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
221 CIFS_MOUNT_MAP_SPECIAL_CHR);
Jeff Laytone911d0c2008-07-12 13:47:59 -0700222 if (rc == -EREMOTE && !is_dfs_referral) {
223 is_dfs_referral = true;
224 cFYI(DBG2, ("DFS ref"));
225 /* for DFS, server does not give us real inode data */
226 fill_fake_finddataunix(&find_data, sb);
227 rc = 0;
228 } else if (rc)
229 goto cgiiu_exit;
230
Steve French0e4bbde2008-05-20 19:50:46 +0000231 num_of_bytes = le64_to_cpu(find_data.NumOfBytes);
232 end_of_file = le64_to_cpu(find_data.EndOfFile);
233
234 /* get new inode */
235 if (*pinode == NULL) {
236 *pinode = new_inode(sb);
237 if (*pinode == NULL) {
238 rc = -ENOMEM;
Jeff Laytone911d0c2008-07-12 13:47:59 -0700239 goto cgiiu_exit;
Steve French0e4bbde2008-05-20 19:50:46 +0000240 }
241 /* Is an i_ino of zero legal? */
242 /* note ino incremented to unique num in new_inode */
243 /* Are there sanity checks we can use to ensure that
244 the server is really filling in that field? */
245 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
246 (*pinode)->i_ino = (unsigned long)find_data.UniqueId;
247
248 if (sb->s_flags & MS_NOATIME)
249 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
250
251 insert_inode_hash(*pinode);
252 }
253
254 inode = *pinode;
255 cifsInfo = CIFS_I(inode);
256
257 cFYI(1, ("Old time %ld", cifsInfo->time));
258 cifsInfo->time = jiffies;
259 cFYI(1, ("New time %ld", cifsInfo->time));
260 /* this is ok to set on every inode revalidate */
261 atomic_set(&cifsInfo->inUse, 1);
262
263 cifs_unix_info_to_inode(inode, &find_data, 0);
264
265 if (num_of_bytes < end_of_file)
266 cFYI(1, ("allocation size less than end of file"));
267 cFYI(1, ("Size %ld and blocks %llu",
268 (unsigned long) inode->i_size,
269 (unsigned long long)inode->i_blocks));
270
271 cifs_set_ops(inode, is_dfs_referral);
Igor Mammedov79626702008-03-09 03:44:18 +0000272cgiiu_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 return rc;
274}
275
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000276static int decode_sfu_inode(struct inode *inode, __u64 size,
Steve Frenchd6e2f2a2005-11-15 16:43:39 -0800277 const unsigned char *path,
278 struct cifs_sb_info *cifs_sb, int xid)
279{
280 int rc;
Steve French4b18f2a2008-04-29 00:06:05 +0000281 int oplock = 0;
Steve Frenchd6e2f2a2005-11-15 16:43:39 -0800282 __u16 netfid;
283 struct cifsTconInfo *pTcon = cifs_sb->tcon;
Steve French86c96b42005-11-18 20:25:31 -0800284 char buf[24];
Steve Frenchd6e2f2a2005-11-15 16:43:39 -0800285 unsigned int bytes_read;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000286 char *pbuf;
Steve Frenchd6e2f2a2005-11-15 16:43:39 -0800287
288 pbuf = buf;
289
Steve French4523cc32007-04-30 20:13:06 +0000290 if (size == 0) {
Steve Frenchd6e2f2a2005-11-15 16:43:39 -0800291 inode->i_mode |= S_IFIFO;
292 return 0;
293 } else if (size < 8) {
294 return -EINVAL; /* EOPNOTSUPP? */
295 }
Steve French50c2f752007-07-13 00:33:32 +0000296
Steve Frenchd6e2f2a2005-11-15 16:43:39 -0800297 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
298 CREATE_NOT_DIR, &netfid, &oplock, NULL,
299 cifs_sb->local_nls,
300 cifs_sb->mnt_cifs_flags &
301 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000302 if (rc == 0) {
Steve Frenchec637e32005-12-12 20:53:18 -0800303 int buf_type = CIFS_NO_BUFFER;
Steve Frenchd6e2f2a2005-11-15 16:43:39 -0800304 /* Read header */
305 rc = CIFSSMBRead(xid, pTcon,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000306 netfid,
Steve French86c96b42005-11-18 20:25:31 -0800307 24 /* length */, 0 /* offset */,
Steve Frenchec637e32005-12-12 20:53:18 -0800308 &bytes_read, &pbuf, &buf_type);
Steve French4523cc32007-04-30 20:13:06 +0000309 if ((rc == 0) && (bytes_read >= 8)) {
310 if (memcmp("IntxBLK", pbuf, 8) == 0) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000311 cFYI(1, ("Block device"));
Steve French3020a1f2005-11-18 11:31:10 -0800312 inode->i_mode |= S_IFBLK;
Steve French4523cc32007-04-30 20:13:06 +0000313 if (bytes_read == 24) {
Steve French86c96b42005-11-18 20:25:31 -0800314 /* we have enough to decode dev num */
315 __u64 mjr; /* major */
316 __u64 mnr; /* minor */
317 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
318 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
319 inode->i_rdev = MKDEV(mjr, mnr);
320 }
Steve French4523cc32007-04-30 20:13:06 +0000321 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000322 cFYI(1, ("Char device"));
Steve French3020a1f2005-11-18 11:31:10 -0800323 inode->i_mode |= S_IFCHR;
Steve French4523cc32007-04-30 20:13:06 +0000324 if (bytes_read == 24) {
Steve French86c96b42005-11-18 20:25:31 -0800325 /* we have enough to decode dev num */
326 __u64 mjr; /* major */
327 __u64 mnr; /* minor */
328 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
329 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
330 inode->i_rdev = MKDEV(mjr, mnr);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000331 }
Steve French4523cc32007-04-30 20:13:06 +0000332 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000333 cFYI(1, ("Symlink"));
Steve French3020a1f2005-11-18 11:31:10 -0800334 inode->i_mode |= S_IFLNK;
Steve French86c96b42005-11-18 20:25:31 -0800335 } else {
336 inode->i_mode |= S_IFREG; /* file? */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000337 rc = -EOPNOTSUPP;
Steve French86c96b42005-11-18 20:25:31 -0800338 }
Steve French3020a1f2005-11-18 11:31:10 -0800339 } else {
340 inode->i_mode |= S_IFREG; /* then it is a file */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000341 rc = -EOPNOTSUPP; /* or some unknown SFU type */
342 }
Steve Frenchd6e2f2a2005-11-15 16:43:39 -0800343 CIFSSMBClose(xid, pTcon, netfid);
Steve Frenchd6e2f2a2005-11-15 16:43:39 -0800344 }
345 return rc;
Steve Frenchd6e2f2a2005-11-15 16:43:39 -0800346}
347
Steve French9e294f12005-11-17 16:59:21 -0800348#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
349
Steve French953f8682007-10-31 04:54:42 +0000350static int get_sfu_mode(struct inode *inode,
Steve French9e294f12005-11-17 16:59:21 -0800351 const unsigned char *path,
352 struct cifs_sb_info *cifs_sb, int xid)
353{
Steve French3020a1f2005-11-18 11:31:10 -0800354#ifdef CONFIG_CIFS_XATTR
Steve French9e294f12005-11-17 16:59:21 -0800355 ssize_t rc;
356 char ea_value[4];
357 __u32 mode;
358
359 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
360 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000361 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve French4523cc32007-04-30 20:13:06 +0000362 if (rc < 0)
Steve French9e294f12005-11-17 16:59:21 -0800363 return (int)rc;
364 else if (rc > 3) {
365 mode = le32_to_cpu(*((__le32 *)ea_value));
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000366 inode->i_mode &= ~SFBITS_MASK;
367 cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
Steve French9e294f12005-11-17 16:59:21 -0800368 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000369 cFYI(1, ("special mode bits 0%o", mode));
Steve French9e294f12005-11-17 16:59:21 -0800370 return 0;
371 } else {
372 return 0;
373 }
Steve French3020a1f2005-11-18 11:31:10 -0800374#else
375 return -EOPNOTSUPP;
376#endif
Steve French9e294f12005-11-17 16:59:21 -0800377}
378
Steve Frenchb9a32602008-05-20 21:52:32 +0000379/*
380 * Needed to setup inode data for the directory which is the
381 * junction to the new submount (ie to setup the fake directory
382 * which represents a DFS referral)
383 */
384static void fill_fake_finddata(FILE_ALL_INFO *pfnd_dat,
385 struct super_block *sb)
386{
Dave Jones0a891ad2008-05-22 14:20:21 +0000387 memset(pfnd_dat, 0, sizeof(FILE_ALL_INFO));
Steve Frenchb9a32602008-05-20 21:52:32 +0000388
389/* __le64 pfnd_dat->AllocationSize = cpu_to_le64(0);
390 __le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
391 __u8 pfnd_dat->DeletePending = 0;
392 __u8 pfnd_data->Directory = 0;
393 __le32 pfnd_dat->EASize = 0;
394 __u64 pfnd_dat->IndexNumber = 0;
395 __u64 pfnd_dat->IndexNumber1 = 0; */
396 pfnd_dat->CreationTime =
397 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
398 pfnd_dat->LastAccessTime =
399 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
400 pfnd_dat->LastWriteTime =
401 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
402 pfnd_dat->ChangeTime =
403 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
404 pfnd_dat->Attributes = cpu_to_le32(ATTR_DIRECTORY);
405 pfnd_dat->NumberOfLinks = cpu_to_le32(2);
406}
407
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408int cifs_get_inode_info(struct inode **pinode,
Steve French646dd532008-05-15 01:50:56 +0000409 const unsigned char *full_path, FILE_ALL_INFO *pfindData,
Steve French8b1327f2008-03-14 22:37:16 +0000410 struct super_block *sb, int xid, const __u16 *pfid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411{
412 int rc = 0;
Steve Frenchb9a32602008-05-20 21:52:32 +0000413 __u32 attr;
414 struct cifsInodeInfo *cifsInfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 struct cifsTconInfo *pTcon;
416 struct inode *inode;
417 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 char *buf = NULL;
Steve French5ade9de2008-05-02 20:56:23 +0000419 bool adjustTZ = false;
Igor Mammedov79626702008-03-09 03:44:18 +0000420 bool is_dfs_referral = false;
Jeff Layton4468eb32008-05-22 09:31:40 -0400421 umode_t default_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422
423 pTcon = cifs_sb->tcon;
Steve French646dd532008-05-15 01:50:56 +0000424 cFYI(1, ("Getting info on %s", full_path));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
Steve Frenchd0d2f2d2005-06-02 15:12:36 -0700426 if ((pfindData == NULL) && (*pinode != NULL)) {
427 if (CIFS_I(*pinode)->clientCanCacheRead) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000428 cFYI(1, ("No need to revalidate cached inode sizes"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 return rc;
430 }
431 }
432
433 /* if file info not passed in then get it from server */
Steve Frenchd0d2f2d2005-06-02 15:12:36 -0700434 if (pfindData == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
Steve Frenchd0d2f2d2005-06-02 15:12:36 -0700436 if (buf == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 return -ENOMEM;
438 pfindData = (FILE_ALL_INFO *)buf;
Igor Mammedov79626702008-03-09 03:44:18 +0000439
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 /* could do find first instead but this returns more info */
Igor Mammedov79626702008-03-09 03:44:18 +0000441 rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
Steve Frenchacf1a1b2006-10-12 03:28:28 +0000442 0 /* not legacy */,
Steve French6b8edfe2005-08-23 20:26:03 -0700443 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
Steve French737b7582005-04-28 22:41:06 -0700444 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve French6b8edfe2005-08-23 20:26:03 -0700445 /* BB optimize code so we do not make the above call
446 when server claims no NT SMB support and the above call
447 failed at least once - set flag in tcon or mount */
Steve French4523cc32007-04-30 20:13:06 +0000448 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
Igor Mammedov79626702008-03-09 03:44:18 +0000449 rc = SMBQueryInformation(xid, pTcon, full_path,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000450 pfindData, cifs_sb->local_nls,
Steve French6b8edfe2005-08-23 20:26:03 -0700451 cifs_sb->mnt_cifs_flags &
452 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve French4b18f2a2008-04-29 00:06:05 +0000453 adjustTZ = true;
Steve French6b8edfe2005-08-23 20:26:03 -0700454 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 }
456 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
Steve Frenchb9a32602008-05-20 21:52:32 +0000457 if (rc == -EREMOTE) {
458 is_dfs_referral = true;
459 fill_fake_finddata(pfindData, sb);
460 rc = 0;
461 } else if (rc)
Igor Mammedov79626702008-03-09 03:44:18 +0000462 goto cgii_exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Steve Frenchb9a32602008-05-20 21:52:32 +0000464 attr = le32_to_cpu(pfindData->Attributes);
465
466 /* get new inode */
467 if (*pinode == NULL) {
468 *pinode = new_inode(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 if (*pinode == NULL) {
Steve Frenchb9a32602008-05-20 21:52:32 +0000470 rc = -ENOMEM;
471 goto cgii_exit;
472 }
473 /* Is an i_ino of zero legal? Can we use that to check
474 if the server supports returning inode numbers? Are
475 there other sanity checks we can use to ensure that
476 the server is really filling in that field? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
Steve Frenchb9a32602008-05-20 21:52:32 +0000478 /* We can not use the IndexNumber field by default from
479 Windows or Samba (in ALL_INFO buf) but we can request
480 it explicitly. It may not be unique presumably if
481 the server has multiple devices mounted under one share */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482
Steve Frenchb9a32602008-05-20 21:52:32 +0000483 /* There may be higher info levels that work but are
484 there Windows server or network appliances for which
485 IndexNumber field is not guaranteed unique? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Steve Frenchb9a32602008-05-20 21:52:32 +0000487 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
488 int rc1 = 0;
489 __u64 inode_num;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
Steve Frenchb9a32602008-05-20 21:52:32 +0000491 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
Steve French646dd532008-05-15 01:50:56 +0000492 full_path, &inode_num,
Steve French737b7582005-04-28 22:41:06 -0700493 cifs_sb->local_nls,
494 cifs_sb->mnt_cifs_flags &
495 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve Frenchb9a32602008-05-20 21:52:32 +0000496 if (rc1) {
497 cFYI(1, ("GetSrvInodeNum rc %d", rc1));
498 /* BB EOPNOSUPP disable SERVER_INUM? */
499 } else /* do we need cast or hash to ino? */
500 (*pinode)->i_ino = inode_num;
501 } /* else ino incremented to unique num in new_inode*/
502 if (sb->s_flags & MS_NOATIME)
503 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
504 insert_inode_hash(*pinode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 }
Steve Frenchb9a32602008-05-20 21:52:32 +0000506 inode = *pinode;
507 cifsInfo = CIFS_I(inode);
508 cifsInfo->cifsAttrs = attr;
509 cFYI(1, ("Old time %ld", cifsInfo->time));
510 cifsInfo->time = jiffies;
511 cFYI(1, ("New time %ld", cifsInfo->time));
512
513 /* blksize needs to be multiple of two. So safer to default to
514 blksize and blkbits set in superblock so 2**blkbits and blksize
515 will match rather than setting to:
516 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
517
518 /* Linux can not store file creation time so ignore it */
519 if (pfindData->LastAccessTime)
520 inode->i_atime = cifs_NTtimeToUnix
521 (le64_to_cpu(pfindData->LastAccessTime));
522 else /* do not need to use current_fs_time - time not stored */
523 inode->i_atime = CURRENT_TIME;
524 inode->i_mtime =
525 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
526 inode->i_ctime =
527 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
528 cFYI(DBG2, ("Attributes came in as 0x%x", attr));
529 if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
530 inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
531 inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
532 }
533
Jeff Layton4468eb32008-05-22 09:31:40 -0400534 /* get default inode mode */
535 if (attr & ATTR_DIRECTORY)
536 default_mode = cifs_sb->mnt_dir_mode;
537 else
538 default_mode = cifs_sb->mnt_file_mode;
Steve Frenchb9a32602008-05-20 21:52:32 +0000539
Jeff Layton4468eb32008-05-22 09:31:40 -0400540 /* set permission bits */
541 if (atomic_read(&cifsInfo->inUse) == 0 ||
542 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
543 inode->i_mode = default_mode;
544 else {
545 /* just reenable write bits if !ATTR_READONLY */
546 if ((inode->i_mode & S_IWUGO) == 0 &&
547 (attr & ATTR_READONLY) == 0)
548 inode->i_mode |= (S_IWUGO & default_mode);
549 inode->i_mode &= ~S_IFMT;
550 }
551 /* clear write bits if ATTR_READONLY is set */
552 if (attr & ATTR_READONLY)
553 inode->i_mode &= ~S_IWUGO;
554
555 /* set inode type */
556 if ((attr & ATTR_SYSTEM) &&
557 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) {
558 /* no need to fix endianness on 0 */
559 if (pfindData->EndOfFile == 0)
560 inode->i_mode |= S_IFIFO;
561 else if (decode_sfu_inode(inode,
562 le64_to_cpu(pfindData->EndOfFile),
563 full_path, cifs_sb, xid))
564 cFYI(1, ("unknown SFU file type\n"));
Steve Frenchb9a32602008-05-20 21:52:32 +0000565 } else {
Jeff Layton4468eb32008-05-22 09:31:40 -0400566 if (attr & ATTR_DIRECTORY)
567 inode->i_mode |= S_IFDIR;
568 else
569 inode->i_mode |= S_IFREG;
Steve Frenchb9a32602008-05-20 21:52:32 +0000570 }
571
572 spin_lock(&inode->i_lock);
573 if (is_size_safe_to_change(cifsInfo,
574 le64_to_cpu(pfindData->EndOfFile))) {
575 /* can not safely shrink the file size here if the
576 client is writing to it due to potential races */
577 i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
578
579 /* 512 bytes (2**9) is the fake blocksize that must be
580 used for this calculation */
581 inode->i_blocks = (512 - 1 + le64_to_cpu(
582 pfindData->AllocationSize)) >> 9;
583 }
584 spin_unlock(&inode->i_lock);
585
586 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
587
588 /* BB fill in uid and gid here? with help from winbind?
589 or retrieve from NTFS stream extended attribute */
590#ifdef CONFIG_CIFS_EXPERIMENTAL
591 /* fill in 0777 bits from ACL */
592 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
593 cFYI(1, ("Getting mode bits from ACL"));
594 acl_to_uid_mode(inode, full_path, pfid);
595 }
596#endif
597 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
598 /* fill in remaining high mode bits e.g. SUID, VTX */
599 get_sfu_mode(inode, full_path, cifs_sb, xid);
600 } else if (atomic_read(&cifsInfo->inUse) == 0) {
601 inode->i_uid = cifs_sb->mnt_uid;
602 inode->i_gid = cifs_sb->mnt_gid;
603 /* set so we do not keep refreshing these fields with
604 bad data after user has changed them in memory */
605 atomic_set(&cifsInfo->inUse, 1);
606 }
607
608 cifs_set_ops(inode, is_dfs_referral);
609
610
611
612
Igor Mammedov79626702008-03-09 03:44:18 +0000613cgii_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 kfree(buf);
615 return rc;
616}
617
Steve French7f8ed422007-09-28 22:28:55 +0000618static const struct inode_operations cifs_ipc_inode_ops = {
619 .lookup = cifs_lookup,
620};
621
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622/* gets root inode */
David Howellsce634ab2008-02-07 00:15:33 -0800623struct inode *cifs_iget(struct super_block *sb, unsigned long ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624{
David Howellsce634ab2008-02-07 00:15:33 -0800625 int xid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 struct cifs_sb_info *cifs_sb;
David Howellsce634ab2008-02-07 00:15:33 -0800627 struct inode *inode;
628 long rc;
629
630 inode = iget_locked(sb, ino);
631 if (!inode)
632 return ERR_PTR(-ENOMEM);
633 if (!(inode->i_state & I_NEW))
634 return inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635
636 cifs_sb = CIFS_SB(inode->i_sb);
637 xid = GetXid();
Steve Frenchc18c8422007-07-18 23:21:09 +0000638
639 if (cifs_sb->tcon->unix_ext)
Steve French7f8ed422007-09-28 22:28:55 +0000640 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 else
Steve French8b1327f2008-03-14 22:37:16 +0000642 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid,
643 NULL);
Steve French7f8ed422007-09-28 22:28:55 +0000644 if (rc && cifs_sb->tcon->ipc) {
645 cFYI(1, ("ipc connection - fake read inode"));
646 inode->i_mode |= S_IFDIR;
647 inode->i_nlink = 2;
648 inode->i_op = &cifs_ipc_inode_ops;
649 inode->i_fop = &simple_dir_operations;
650 inode->i_uid = cifs_sb->mnt_uid;
651 inode->i_gid = cifs_sb->mnt_gid;
David Howellsce634ab2008-02-07 00:15:33 -0800652 _FreeXid(xid);
653 iget_failed(inode);
654 return ERR_PTR(rc);
Steve French7f8ed422007-09-28 22:28:55 +0000655 }
656
David Howellsce634ab2008-02-07 00:15:33 -0800657 unlock_new_inode(inode);
658
659 /* can not call macro FreeXid here since in a void func
660 * TODO: This is no longer true
661 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 _FreeXid(xid);
David Howellsce634ab2008-02-07 00:15:33 -0800663 return inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664}
665
666int cifs_unlink(struct inode *inode, struct dentry *direntry)
667{
668 int rc = 0;
669 int xid;
670 struct cifs_sb_info *cifs_sb;
671 struct cifsTconInfo *pTcon;
672 char *full_path = NULL;
673 struct cifsInodeInfo *cifsInode;
674 FILE_BASIC_INFO *pinfo_buf;
675
Steve French06bcfed2006-03-31 22:43:50 +0000676 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677
678 xid = GetXid();
679
Steve French4523cc32007-04-30 20:13:06 +0000680 if (inode)
Steve French6910ab32006-03-31 03:37:08 +0000681 cifs_sb = CIFS_SB(inode->i_sb);
682 else
Steve French06bcfed2006-03-31 22:43:50 +0000683 cifs_sb = CIFS_SB(direntry->d_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 pTcon = cifs_sb->tcon;
685
686 /* Unlink can be called from rename so we can not grab the sem here
687 since we deadlock otherwise */
Arjan van de Vena11f3a02006-03-23 03:00:33 -0800688/* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
Steve French7f573562005-08-30 11:32:14 -0700689 full_path = build_path_from_dentry(direntry);
Arjan van de Vena11f3a02006-03-23 03:00:33 -0800690/* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 if (full_path == NULL) {
692 FreeXid(xid);
693 return -ENOMEM;
694 }
Steve French2d785a52007-07-15 01:48:57 +0000695
696 if ((pTcon->ses->capabilities & CAP_UNIX) &&
697 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
698 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
699 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
700 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
701 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
702 cFYI(1, ("posix del rc %d", rc));
703 if ((rc == 0) || (rc == -ENOENT))
704 goto psx_del_no_retry;
705 }
706
Steve French737b7582005-04-28 22:41:06 -0700707 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
708 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve French2d785a52007-07-15 01:48:57 +0000709psx_del_no_retry:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 if (!rc) {
Steve Frenchd0d2f2d2005-06-02 15:12:36 -0700711 if (direntry->d_inode)
Dave Hansen9a53c3a2006-09-30 23:29:03 -0700712 drop_nlink(direntry->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 } else if (rc == -ENOENT) {
714 d_drop(direntry);
715 } else if (rc == -ETXTBSY) {
Steve French4b18f2a2008-04-29 00:06:05 +0000716 int oplock = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 __u16 netfid;
718
719 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
720 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
Steve French737b7582005-04-28 22:41:06 -0700721 &netfid, &oplock, NULL, cifs_sb->local_nls,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000722 cifs_sb->mnt_cifs_flags &
Steve French737b7582005-04-28 22:41:06 -0700723 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000724 if (rc == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000726 cifs_sb->local_nls,
727 cifs_sb->mnt_cifs_flags &
Steve French737b7582005-04-28 22:41:06 -0700728 CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 CIFSSMBClose(xid, pTcon, netfid);
Steve Frenchd0d2f2d2005-06-02 15:12:36 -0700730 if (direntry->d_inode)
Dave Hansen9a53c3a2006-09-30 23:29:03 -0700731 drop_nlink(direntry->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 }
733 } else if (rc == -EACCES) {
734 /* try only if r/o attribute set in local lookup data? */
Eric Sesterhenna048d7a2006-02-21 22:33:09 +0000735 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 if (pinfo_buf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 /* ATTRS set to normal clears r/o bit */
738 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
739 if (!(pTcon->ses->flags & CIFS_SES_NT4))
Jeff Layton6fc000e2008-08-02 07:26:12 -0400740 rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 pinfo_buf,
Steve French737b7582005-04-28 22:41:06 -0700742 cifs_sb->local_nls,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000743 cifs_sb->mnt_cifs_flags &
Steve French737b7582005-04-28 22:41:06 -0700744 CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 else
746 rc = -EOPNOTSUPP;
747
748 if (rc == -EOPNOTSUPP) {
Steve French4b18f2a2008-04-29 00:06:05 +0000749 int oplock = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 __u16 netfid;
751 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
752 full_path,
753 (__u16)ATTR_NORMAL,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000754 cifs_sb->local_nls);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 For some strange reason it seems that NT4 eats the
756 old setattr call without actually setting the
757 attributes so on to the third attempted workaround
758 */
759
760 /* BB could scan to see if we already have it open
761 and pass in pid of opener to function */
762 rc = CIFSSMBOpen(xid, pTcon, full_path,
763 FILE_OPEN, SYNCHRONIZE |
764 FILE_WRITE_ATTRIBUTES, 0,
765 &netfid, &oplock, NULL,
Steve French737b7582005-04-28 22:41:06 -0700766 cifs_sb->local_nls,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000767 cifs_sb->mnt_cifs_flags &
Steve French737b7582005-04-28 22:41:06 -0700768 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000769 if (rc == 0) {
Jeff Layton2dd2dfa2008-08-02 07:26:12 -0400770 rc = CIFSSMBSetFileInfo(xid, pTcon,
771 pinfo_buf,
772 netfid,
773 current->tgid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 CIFSSMBClose(xid, pTcon, netfid);
775 }
776 }
777 kfree(pinfo_buf);
778 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000779 if (rc == 0) {
780 rc = CIFSSMBDelFile(xid, pTcon, full_path,
781 cifs_sb->local_nls,
782 cifs_sb->mnt_cifs_flags &
Steve French737b7582005-04-28 22:41:06 -0700783 CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 if (!rc) {
Steve Frenchd0d2f2d2005-06-02 15:12:36 -0700785 if (direntry->d_inode)
Dave Hansen9a53c3a2006-09-30 23:29:03 -0700786 drop_nlink(direntry->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 } else if (rc == -ETXTBSY) {
Steve French4b18f2a2008-04-29 00:06:05 +0000788 int oplock = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 __u16 netfid;
790
791 rc = CIFSSMBOpen(xid, pTcon, full_path,
792 FILE_OPEN, DELETE,
793 CREATE_NOT_DIR |
794 CREATE_DELETE_ON_CLOSE,
795 &netfid, &oplock, NULL,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000796 cifs_sb->local_nls,
797 cifs_sb->mnt_cifs_flags &
Steve French737b7582005-04-28 22:41:06 -0700798 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000799 if (rc == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 CIFSSMBRenameOpenFile(xid, pTcon,
801 netfid, NULL,
Steve French737b7582005-04-28 22:41:06 -0700802 cifs_sb->local_nls,
803 cifs_sb->mnt_cifs_flags &
804 CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 CIFSSMBClose(xid, pTcon, netfid);
Steve Frenchd0d2f2d2005-06-02 15:12:36 -0700806 if (direntry->d_inode)
Dave Hansen9a53c3a2006-09-30 23:29:03 -0700807 drop_nlink(direntry->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 }
809 /* BB if rc = -ETXTBUSY goto the rename logic BB */
810 }
811 }
812 }
Steve Frenchd0d2f2d2005-06-02 15:12:36 -0700813 if (direntry->d_inode) {
Steve Frenchb2aeb9d2005-05-17 13:16:18 -0500814 cifsInode = CIFS_I(direntry->d_inode);
815 cifsInode->time = 0; /* will force revalidate to get info
816 when needed */
817 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
818 }
Steve French4523cc32007-04-30 20:13:06 +0000819 if (inode) {
Steve French06bcfed2006-03-31 22:43:50 +0000820 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
821 cifsInode = CIFS_I(inode);
822 cifsInode->time = 0; /* force revalidate of dir as well */
823 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824
825 kfree(full_path);
826 FreeXid(xid);
827 return rc;
828}
829
Steve French2dd29d32007-04-23 22:07:35 +0000830static void posix_fill_in_inode(struct inode *tmp_inode,
Steve French0b442d22008-02-26 03:44:02 +0000831 FILE_UNIX_BASIC_INFO *pData, int isNewInode)
Steve French2dd29d32007-04-23 22:07:35 +0000832{
Christoph Hellwig75f12982008-02-25 20:25:21 +0000833 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
Steve French2dd29d32007-04-23 22:07:35 +0000834 loff_t local_size;
835 struct timespec local_mtime;
836
Steve French2dd29d32007-04-23 22:07:35 +0000837 cifsInfo->time = jiffies;
838 atomic_inc(&cifsInfo->inUse);
839
840 /* save mtime and size */
841 local_mtime = tmp_inode->i_mtime;
842 local_size = tmp_inode->i_size;
843
Christoph Hellwig75f12982008-02-25 20:25:21 +0000844 cifs_unix_info_to_inode(tmp_inode, pData, 1);
Igor Mammedov79626702008-03-09 03:44:18 +0000845 cifs_set_ops(tmp_inode, false);
Steve French2dd29d32007-04-23 22:07:35 +0000846
Christoph Hellwig75f12982008-02-25 20:25:21 +0000847 if (!S_ISREG(tmp_inode->i_mode))
848 return;
849
850 /*
851 * No sense invalidating pages for new inode
852 * since we we have not started caching
853 * readahead file data yet.
854 */
855 if (isNewInode)
856 return;
857
858 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
859 (local_size == tmp_inode->i_size)) {
860 cFYI(1, ("inode exists but unchanged"));
Steve French2dd29d32007-04-23 22:07:35 +0000861 } else {
Christoph Hellwig75f12982008-02-25 20:25:21 +0000862 /* file may have changed on server */
863 cFYI(1, ("invalidate inode, readdir detected change"));
864 invalidate_remote_inode(tmp_inode);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000865 }
Steve French2dd29d32007-04-23 22:07:35 +0000866}
867
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
869{
870 int rc = 0;
871 int xid;
872 struct cifs_sb_info *cifs_sb;
873 struct cifsTconInfo *pTcon;
874 char *full_path = NULL;
875 struct inode *newinode = NULL;
876
Steve French6473a552005-11-29 20:20:10 -0800877 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878
879 xid = GetXid();
880
881 cifs_sb = CIFS_SB(inode->i_sb);
882 pTcon = cifs_sb->tcon;
883
Steve French7f573562005-08-30 11:32:14 -0700884 full_path = build_path_from_dentry(direntry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885 if (full_path == NULL) {
886 FreeXid(xid);
887 return -ENOMEM;
888 }
Steve French50c2f752007-07-13 00:33:32 +0000889
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000890 if ((pTcon->ses->capabilities & CAP_UNIX) &&
891 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
Steve French2dd29d32007-04-23 22:07:35 +0000892 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
893 u32 oplock = 0;
Steve Frenchf6d09982008-01-08 23:18:22 +0000894 FILE_UNIX_BASIC_INFO *pInfo =
Steve French2dd29d32007-04-23 22:07:35 +0000895 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000896 if (pInfo == NULL) {
Steve French2dd29d32007-04-23 22:07:35 +0000897 rc = -ENOMEM;
898 goto mkdir_out;
899 }
Steve French50c2f752007-07-13 00:33:32 +0000900
Jeffa8cd9252007-09-13 18:38:50 +0000901 mode &= ~current->fs->umask;
Steve French2dd29d32007-04-23 22:07:35 +0000902 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
903 mode, NULL /* netfid */, pInfo, &oplock,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000904 full_path, cifs_sb->local_nls,
905 cifs_sb->mnt_cifs_flags &
Steve French2dd29d32007-04-23 22:07:35 +0000906 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve Frenchc45d7072007-09-17 02:04:21 +0000907 if (rc == -EOPNOTSUPP) {
908 kfree(pInfo);
909 goto mkdir_retry_old;
910 } else if (rc) {
Steve French2dd29d32007-04-23 22:07:35 +0000911 cFYI(1, ("posix mkdir returned 0x%x", rc));
912 d_drop(direntry);
913 } else {
Cyril Gorcunov8f2376a2007-10-14 17:58:43 +0000914 if (pInfo->Type == cpu_to_le32(-1)) {
915 /* no return info, go query for it */
Steve French5a07cdf2007-09-16 23:12:47 +0000916 kfree(pInfo);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000917 goto mkdir_get_info;
Steve French5a07cdf2007-09-16 23:12:47 +0000918 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000919/*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
920 to set uid/gid */
Steve French2dd29d32007-04-23 22:07:35 +0000921 inc_nlink(inode);
922 if (pTcon->nocase)
923 direntry->d_op = &cifs_ci_dentry_ops;
924 else
925 direntry->d_op = &cifs_dentry_ops;
Steve Frenchcbac3cb2007-04-25 11:46:06 +0000926
927 newinode = new_inode(inode->i_sb);
Steve French5a07cdf2007-09-16 23:12:47 +0000928 if (newinode == NULL) {
929 kfree(pInfo);
Steve Frenchcbac3cb2007-04-25 11:46:06 +0000930 goto mkdir_get_info;
Steve French5a07cdf2007-09-16 23:12:47 +0000931 }
Steve Frenchcbac3cb2007-04-25 11:46:06 +0000932 /* Is an i_ino of zero legal? */
933 /* Are there sanity checks we can use to ensure that
934 the server is really filling in that field? */
935 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
936 newinode->i_ino =
937 (unsigned long)pInfo->UniqueId;
938 } /* note ino incremented to unique num in new_inode */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000939 if (inode->i_sb->s_flags & MS_NOATIME)
Steve Frenchcbac3cb2007-04-25 11:46:06 +0000940 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
941 newinode->i_nlink = 2;
942
943 insert_inode_hash(newinode);
Steve French2dd29d32007-04-23 22:07:35 +0000944 d_instantiate(direntry, newinode);
Steve Frenchcbac3cb2007-04-25 11:46:06 +0000945
946 /* we already checked in POSIXCreate whether
947 frame was long enough */
948 posix_fill_in_inode(direntry->d_inode,
Steve French0b442d22008-02-26 03:44:02 +0000949 pInfo, 1 /* NewInode */);
Steve Frenchcbac3cb2007-04-25 11:46:06 +0000950#ifdef CONFIG_CIFS_DEBUG2
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000951 cFYI(1, ("instantiated dentry %p %s to inode %p",
Steve Frenchcbac3cb2007-04-25 11:46:06 +0000952 direntry, direntry->d_name.name, newinode));
953
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000954 if (newinode->i_nlink != 2)
955 cFYI(1, ("unexpected number of links %d",
Steve Frenchcbac3cb2007-04-25 11:46:06 +0000956 newinode->i_nlink));
957#endif
Steve French2dd29d32007-04-23 22:07:35 +0000958 }
959 kfree(pInfo);
960 goto mkdir_out;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000961 }
Steve Frenchc45d7072007-09-17 02:04:21 +0000962mkdir_retry_old:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963 /* BB add setting the equivalent of mode via CreateX w/ACLs */
Steve French737b7582005-04-28 22:41:06 -0700964 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
965 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 if (rc) {
Steve French26a21b92006-05-31 18:05:34 +0000967 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 d_drop(direntry);
969 } else {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000970mkdir_get_info:
Dave Hansend8c76e62006-09-30 23:29:04 -0700971 inc_nlink(inode);
Steve Frenchc18c8422007-07-18 23:21:09 +0000972 if (pTcon->unix_ext)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973 rc = cifs_get_inode_info_unix(&newinode, full_path,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000974 inode->i_sb, xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 else
976 rc = cifs_get_inode_info(&newinode, full_path, NULL,
Steve French8b1327f2008-03-14 22:37:16 +0000977 inode->i_sb, xid, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978
Steve Frenchb92327f2005-08-22 20:09:43 -0700979 if (pTcon->nocase)
980 direntry->d_op = &cifs_ci_dentry_ops;
981 else
982 direntry->d_op = &cifs_dentry_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983 d_instantiate(direntry, newinode);
Steve French2dd29d32007-04-23 22:07:35 +0000984 /* setting nlink not necessary except in cases where we
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000985 * failed to get it from the server or was set bogus */
Steve French2dd29d32007-04-23 22:07:35 +0000986 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000987 direntry->d_inode->i_nlink = 2;
Jeff Layton95089912008-08-06 04:39:02 +0000988
Jeff Layton67750fb2008-05-09 22:28:02 +0000989 mode &= ~current->fs->umask;
Jeff Layton95089912008-08-06 04:39:02 +0000990 /* must turn on setgid bit if parent dir has it */
991 if (inode->i_mode & S_ISGID)
992 mode |= S_ISGID;
993
Steve Frenchc18c8422007-07-18 23:21:09 +0000994 if (pTcon->unix_ext) {
Jeff Layton4e1e7fb2008-08-02 07:26:12 -0400995 struct cifs_unix_set_info_args args = {
996 .mode = mode,
997 .ctime = NO_CHANGE_64,
998 .atime = NO_CHANGE_64,
999 .mtime = NO_CHANGE_64,
1000 .device = 0,
1001 };
Steve Frenchd0d2f2d2005-06-02 15:12:36 -07001002 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
Jeff Layton4e1e7fb2008-08-02 07:26:12 -04001003 args.uid = (__u64)current->fsuid;
Jeff Layton95089912008-08-06 04:39:02 +00001004 if (inode->i_mode & S_ISGID)
1005 args.gid = (__u64)inode->i_gid;
1006 else
1007 args.gid = (__u64)current->fsgid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 } else {
Jeff Layton4e1e7fb2008-08-02 07:26:12 -04001009 args.uid = NO_CHANGE_64;
1010 args.gid = NO_CHANGE_64;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011 }
Jeff Layton4e1e7fb2008-08-02 07:26:12 -04001012 CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
1013 cifs_sb->local_nls,
1014 cifs_sb->mnt_cifs_flags &
1015 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve French3ce53fc2007-06-08 14:55:14 +00001016 } else {
Jeff Layton67750fb2008-05-09 22:28:02 +00001017 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1018 (mode & S_IWUGO) == 0) {
1019 FILE_BASIC_INFO pInfo;
1020 memset(&pInfo, 0, sizeof(pInfo));
1021 pInfo.Attributes = cpu_to_le32(ATTR_READONLY);
Jeff Layton6fc000e2008-08-02 07:26:12 -04001022 CIFSSMBSetPathInfo(xid, pTcon, full_path,
Jeff Layton67750fb2008-05-09 22:28:02 +00001023 &pInfo, cifs_sb->local_nls,
1024 cifs_sb->mnt_cifs_flags &
1025 CIFS_MOUNT_MAP_SPECIAL_CHR);
1026 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001027 if (direntry->d_inode) {
Jeff Laytonb0fd30d2008-05-22 09:33:34 -04001028 if (cifs_sb->mnt_cifs_flags &
1029 CIFS_MOUNT_DYNPERM)
1030 direntry->d_inode->i_mode =
1031 (mode | S_IFDIR);
Steve French4e94a102008-05-23 18:22:46 +00001032
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001033 if (cifs_sb->mnt_cifs_flags &
Steve French6473a552005-11-29 20:20:10 -08001034 CIFS_MOUNT_SET_UID) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001035 direntry->d_inode->i_uid =
Steve French6473a552005-11-29 20:20:10 -08001036 current->fsuid;
Jeff Layton95089912008-08-06 04:39:02 +00001037 if (inode->i_mode & S_ISGID)
1038 direntry->d_inode->i_gid =
1039 inode->i_gid;
1040 else
1041 direntry->d_inode->i_gid =
1042 current->fsgid;
Steve French6473a552005-11-29 20:20:10 -08001043 }
1044 }
Steve French2a138ebb2005-11-29 21:22:19 -08001045 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001047mkdir_out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 kfree(full_path);
1049 FreeXid(xid);
1050 return rc;
1051}
1052
1053int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1054{
1055 int rc = 0;
1056 int xid;
1057 struct cifs_sb_info *cifs_sb;
1058 struct cifsTconInfo *pTcon;
1059 char *full_path = NULL;
1060 struct cifsInodeInfo *cifsInode;
1061
Steve French26a21b92006-05-31 18:05:34 +00001062 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063
1064 xid = GetXid();
1065
1066 cifs_sb = CIFS_SB(inode->i_sb);
1067 pTcon = cifs_sb->tcon;
1068
Steve French7f573562005-08-30 11:32:14 -07001069 full_path = build_path_from_dentry(direntry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 if (full_path == NULL) {
1071 FreeXid(xid);
1072 return -ENOMEM;
1073 }
1074
Steve French737b7582005-04-28 22:41:06 -07001075 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1076 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077
1078 if (!rc) {
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001079 drop_nlink(inode);
Steve French3677db12007-02-26 16:46:11 +00001080 spin_lock(&direntry->d_inode->i_lock);
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001081 i_size_write(direntry->d_inode, 0);
Dave Hansence71ec32006-09-30 23:29:06 -07001082 clear_nlink(direntry->d_inode);
Steve French3677db12007-02-26 16:46:11 +00001083 spin_unlock(&direntry->d_inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 }
1085
1086 cifsInode = CIFS_I(direntry->d_inode);
1087 cifsInode->time = 0; /* force revalidate to go get info when
1088 needed */
1089 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1090 current_fs_time(inode->i_sb);
1091
1092 kfree(full_path);
1093 FreeXid(xid);
1094 return rc;
1095}
1096
1097int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1098 struct inode *target_inode, struct dentry *target_direntry)
1099{
1100 char *fromName;
1101 char *toName;
1102 struct cifs_sb_info *cifs_sb_source;
1103 struct cifs_sb_info *cifs_sb_target;
1104 struct cifsTconInfo *pTcon;
1105 int xid;
1106 int rc = 0;
1107
1108 xid = GetXid();
1109
1110 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1111 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1112 pTcon = cifs_sb_source->tcon;
1113
1114 if (pTcon != cifs_sb_target->tcon) {
1115 FreeXid(xid);
1116 return -EXDEV; /* BB actually could be allowed if same server,
1117 but different share.
1118 Might eventually add support for this */
1119 }
1120
1121 /* we already have the rename sem so we do not need to grab it again
1122 here to protect the path integrity */
Steve French7f573562005-08-30 11:32:14 -07001123 fromName = build_path_from_dentry(source_direntry);
1124 toName = build_path_from_dentry(target_direntry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 if ((fromName == NULL) || (toName == NULL)) {
1126 rc = -ENOMEM;
1127 goto cifs_rename_exit;
1128 }
1129
1130 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
Steve French737b7582005-04-28 22:41:06 -07001131 cifs_sb_source->local_nls,
1132 cifs_sb_source->mnt_cifs_flags &
1133 CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 if (rc == -EEXIST) {
1135 /* check if they are the same file because rename of hardlinked
1136 files is a noop */
1137 FILE_UNIX_BASIC_INFO *info_buf_source;
1138 FILE_UNIX_BASIC_INFO *info_buf_target;
1139
1140 info_buf_source =
1141 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1142 if (info_buf_source != NULL) {
1143 info_buf_target = info_buf_source + 1;
Steve Frenchc18c8422007-07-18 23:21:09 +00001144 if (pTcon->unix_ext)
Steve French8e87d4d2006-11-02 03:45:24 +00001145 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001146 info_buf_source,
Steve French8e87d4d2006-11-02 03:45:24 +00001147 cifs_sb_source->local_nls,
1148 cifs_sb_source->mnt_cifs_flags &
1149 CIFS_MOUNT_MAP_SPECIAL_CHR);
1150 /* else rc is still EEXIST so will fall through to
1151 unlink the target and retry rename */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 if (rc == 0) {
1153 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1154 info_buf_target,
Steve French737b7582005-04-28 22:41:06 -07001155 cifs_sb_target->local_nls,
1156 /* remap based on source sb */
1157 cifs_sb_source->mnt_cifs_flags &
1158 CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 }
1160 if ((rc == 0) &&
1161 (info_buf_source->UniqueId ==
1162 info_buf_target->UniqueId)) {
1163 /* do not rename since the files are hardlinked which
1164 is a noop */
1165 } else {
1166 /* we either can not tell the files are hardlinked
1167 (as with Windows servers) or files are not
1168 hardlinked so delete the target manually before
1169 renaming to follow POSIX rather than Windows
1170 semantics */
1171 cifs_unlink(target_inode, target_direntry);
1172 rc = CIFSSMBRename(xid, pTcon, fromName,
1173 toName,
Steve French737b7582005-04-28 22:41:06 -07001174 cifs_sb_source->local_nls,
1175 cifs_sb_source->mnt_cifs_flags
1176 & CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 }
1178 kfree(info_buf_source);
1179 } /* if we can not get memory just leave rc as EEXIST */
1180 }
1181
Steve Frenchad7a2922008-02-07 23:25:02 +00001182 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 cFYI(1, ("rename rc %d", rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184
1185 if ((rc == -EIO) || (rc == -EEXIST)) {
Steve French4b18f2a2008-04-29 00:06:05 +00001186 int oplock = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 __u16 netfid;
1188
1189 /* BB FIXME Is Generic Read correct for rename? */
1190 /* if renaming directory - we should not say CREATE_NOT_DIR,
1191 need to test renaming open directory, also GENERIC_READ
1192 might not right be right access to request */
1193 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1194 CREATE_NOT_DIR, &netfid, &oplock, NULL,
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001195 cifs_sb_source->local_nls,
1196 cifs_sb_source->mnt_cifs_flags &
Steve French737b7582005-04-28 22:41:06 -07001197 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001198 if (rc == 0) {
Steve French8e87d4d2006-11-02 03:45:24 +00001199 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001200 cifs_sb_source->local_nls,
Steve French737b7582005-04-28 22:41:06 -07001201 cifs_sb_source->mnt_cifs_flags &
1202 CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 CIFSSMBClose(xid, pTcon, netfid);
1204 }
1205 }
1206
1207cifs_rename_exit:
1208 kfree(fromName);
1209 kfree(toName);
1210 FreeXid(xid);
1211 return rc;
1212}
1213
1214int cifs_revalidate(struct dentry *direntry)
1215{
1216 int xid;
Jeff Laytoncea21802007-11-20 23:19:03 +00001217 int rc = 0, wbrc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 char *full_path;
1219 struct cifs_sb_info *cifs_sb;
1220 struct cifsInodeInfo *cifsInode;
1221 loff_t local_size;
1222 struct timespec local_mtime;
Steve French4b18f2a2008-04-29 00:06:05 +00001223 bool invalidate_inode = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224
1225 if (direntry->d_inode == NULL)
1226 return -ENOENT;
1227
1228 cifsInode = CIFS_I(direntry->d_inode);
1229
1230 if (cifsInode == NULL)
1231 return -ENOENT;
1232
1233 /* no sense revalidating inode info on file that no one can write */
1234 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1235 return rc;
1236
1237 xid = GetXid();
1238
1239 cifs_sb = CIFS_SB(direntry->d_sb);
1240
1241 /* can not safely grab the rename sem here if rename calls revalidate
1242 since that would deadlock */
Steve French7f573562005-08-30 11:32:14 -07001243 full_path = build_path_from_dentry(direntry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244 if (full_path == NULL) {
1245 FreeXid(xid);
1246 return -ENOMEM;
1247 }
1248 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1249 "jiffies %ld", full_path, direntry->d_inode,
1250 direntry->d_inode->i_count.counter, direntry,
1251 direntry->d_time, jiffies));
1252
1253 if (cifsInode->time == 0) {
1254 /* was set to zero previously to force revalidate */
1255 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1256 lookupCacheEnabled) {
1257 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1258 (direntry->d_inode->i_nlink == 1)) {
1259 kfree(full_path);
1260 FreeXid(xid);
1261 return rc;
1262 } else {
1263 cFYI(1, ("Have to revalidate file due to hardlinks"));
1264 }
1265 }
1266
1267 /* save mtime and size */
1268 local_mtime = direntry->d_inode->i_mtime;
1269 local_size = direntry->d_inode->i_size;
1270
Steve Frenchc18c8422007-07-18 23:21:09 +00001271 if (cifs_sb->tcon->unix_ext) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001273 direntry->d_sb, xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 if (rc) {
1275 cFYI(1, ("error on getting revalidate info %d", rc));
1276/* if (rc != -ENOENT)
1277 rc = 0; */ /* BB should we cache info on
1278 certain errors? */
1279 }
1280 } else {
1281 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
Steve French8b1327f2008-03-14 22:37:16 +00001282 direntry->d_sb, xid, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 if (rc) {
1284 cFYI(1, ("error on getting revalidate info %d", rc));
1285/* if (rc != -ENOENT)
1286 rc = 0; */ /* BB should we cache info on
1287 certain errors? */
1288 }
1289 }
1290 /* should we remap certain errors, access denied?, to zero */
1291
1292 /* if not oplocked, we invalidate inode pages if mtime or file size
1293 had changed on server */
1294
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001295 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 (local_size == direntry->d_inode->i_size)) {
1297 cFYI(1, ("cifs_revalidate - inode unchanged"));
1298 } else {
1299 /* file may have changed on server */
1300 if (cifsInode->clientCanCacheRead) {
1301 /* no need to invalidate inode pages since we were the
1302 only ones who could have modified the file and the
1303 server copy is staler than ours */
1304 } else {
Steve French4b18f2a2008-04-29 00:06:05 +00001305 invalidate_inode = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 }
1307 }
1308
1309 /* can not grab this sem since kernel filesys locking documentation
Jes Sorensen1b1dcc12006-01-09 15:59:24 -08001310 indicates i_mutex may be taken by the kernel on lookup and rename
1311 which could deadlock if we grab the i_mutex here as well */
1312/* mutex_lock(&direntry->d_inode->i_mutex);*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 /* need to write out dirty pages here */
1314 if (direntry->d_inode->i_mapping) {
1315 /* do we need to lock inode until after invalidate completes
1316 below? */
Jeff Laytoncea21802007-11-20 23:19:03 +00001317 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1318 if (wbrc)
1319 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 }
1321 if (invalidate_inode) {
Steve French3abb9272005-11-28 08:16:13 -08001322 /* shrink_dcache not necessary now that cifs dentry ops
1323 are exported for negative dentries */
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001324/* if (S_ISDIR(direntry->d_inode->i_mode))
Steve French3abb9272005-11-28 08:16:13 -08001325 shrink_dcache_parent(direntry); */
1326 if (S_ISREG(direntry->d_inode->i_mode)) {
Suresh Jayaraman9e96af82008-08-05 14:38:40 +05301327 if (direntry->d_inode->i_mapping) {
Jeff Laytoncea21802007-11-20 23:19:03 +00001328 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1329 if (wbrc)
1330 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
Suresh Jayaraman9e96af82008-08-05 14:38:40 +05301331 }
Steve French3abb9272005-11-28 08:16:13 -08001332 /* may eventually have to do this for open files too */
1333 if (list_empty(&(cifsInode->openFileList))) {
1334 /* changed on server - flush read ahead pages */
1335 cFYI(1, ("Invalidating read ahead data on "
1336 "closed file"));
1337 invalidate_remote_inode(direntry->d_inode);
1338 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 }
1340 }
Jes Sorensen1b1dcc12006-01-09 15:59:24 -08001341/* mutex_unlock(&direntry->d_inode->i_mutex); */
Steve French50c2f752007-07-13 00:33:32 +00001342
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343 kfree(full_path);
1344 FreeXid(xid);
1345 return rc;
1346}
1347
1348int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1349 struct kstat *stat)
1350{
1351 int err = cifs_revalidate(dentry);
Steve French5fe14c82006-11-07 19:26:33 +00001352 if (!err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 generic_fillattr(dentry->d_inode, stat);
Steve French5fe14c82006-11-07 19:26:33 +00001354 stat->blksize = CIFS_MAX_MSGSIZE;
1355 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356 return err;
1357}
1358
1359static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1360{
1361 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1362 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1363 struct page *page;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 int rc = 0;
1365
1366 page = grab_cache_page(mapping, index);
1367 if (!page)
1368 return -ENOMEM;
1369
Christoph Lametereebd2aa2008-02-04 22:28:29 -08001370 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 unlock_page(page);
1372 page_cache_release(page);
1373 return rc;
1374}
1375
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001376static int cifs_vmtruncate(struct inode *inode, loff_t offset)
Steve French3677db12007-02-26 16:46:11 +00001377{
1378 struct address_space *mapping = inode->i_mapping;
1379 unsigned long limit;
1380
Steve Frenchba6a46a2007-02-26 20:06:29 +00001381 spin_lock(&inode->i_lock);
Steve French3677db12007-02-26 16:46:11 +00001382 if (inode->i_size < offset)
1383 goto do_expand;
1384 /*
1385 * truncation of in-use swapfiles is disallowed - it would cause
1386 * subsequent swapout to scribble on the now-freed blocks.
1387 */
Steve Frenchba6a46a2007-02-26 20:06:29 +00001388 if (IS_SWAPFILE(inode)) {
1389 spin_unlock(&inode->i_lock);
Steve French3677db12007-02-26 16:46:11 +00001390 goto out_busy;
Steve Frenchba6a46a2007-02-26 20:06:29 +00001391 }
Steve French3677db12007-02-26 16:46:11 +00001392 i_size_write(inode, offset);
1393 spin_unlock(&inode->i_lock);
Steve French8064ab42007-08-22 22:12:07 +00001394 /*
1395 * unmap_mapping_range is called twice, first simply for efficiency
1396 * so that truncate_inode_pages does fewer single-page unmaps. However
1397 * after this first call, and before truncate_inode_pages finishes,
1398 * it is possible for private pages to be COWed, which remain after
1399 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1400 * call must be made for correctness.
1401 */
Steve French3677db12007-02-26 16:46:11 +00001402 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1403 truncate_inode_pages(mapping, offset);
Steve French8064ab42007-08-22 22:12:07 +00001404 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
Steve French3677db12007-02-26 16:46:11 +00001405 goto out_truncate;
1406
1407do_expand:
1408 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
Steve Frenchba6a46a2007-02-26 20:06:29 +00001409 if (limit != RLIM_INFINITY && offset > limit) {
1410 spin_unlock(&inode->i_lock);
Steve French3677db12007-02-26 16:46:11 +00001411 goto out_sig;
Steve Frenchba6a46a2007-02-26 20:06:29 +00001412 }
1413 if (offset > inode->i_sb->s_maxbytes) {
1414 spin_unlock(&inode->i_lock);
Steve French3677db12007-02-26 16:46:11 +00001415 goto out_big;
Steve Frenchba6a46a2007-02-26 20:06:29 +00001416 }
Steve French3677db12007-02-26 16:46:11 +00001417 i_size_write(inode, offset);
Steve Frenchba6a46a2007-02-26 20:06:29 +00001418 spin_unlock(&inode->i_lock);
Steve French3677db12007-02-26 16:46:11 +00001419out_truncate:
1420 if (inode->i_op && inode->i_op->truncate)
1421 inode->i_op->truncate(inode);
1422 return 0;
1423out_sig:
1424 send_sig(SIGXFSZ, current, 0);
1425out_big:
1426 return -EFBIG;
1427out_busy:
1428 return -ETXTBSY;
1429}
1430
Jeff Layton8efdbde2008-07-23 21:28:12 +00001431static int
1432cifs_set_file_size(struct inode *inode, struct iattr *attrs,
1433 int xid, char *full_path)
1434{
1435 int rc;
1436 struct cifsFileInfo *open_file;
1437 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1438 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1439 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1440
1441 /*
1442 * To avoid spurious oplock breaks from server, in the case of
1443 * inodes that we already have open, avoid doing path based
1444 * setting of file size if we can do it by handle.
1445 * This keeps our caching token (oplock) and avoids timeouts
1446 * when the local oplock break takes longer to flush
1447 * writebehind data than the SMB timeout for the SetPathInfo
1448 * request would allow
1449 */
1450 open_file = find_writable_file(cifsInode);
1451 if (open_file) {
1452 __u16 nfid = open_file->netfid;
1453 __u32 npid = open_file->pid;
1454 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
1455 npid, false);
1456 atomic_dec(&open_file->wrtPending);
1457 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1458 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1459 unsigned int bytes_written;
1460 rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
1461 &bytes_written, NULL, NULL, 1);
1462 cFYI(1, ("Wrt seteof rc %d", rc));
1463 }
1464 } else
1465 rc = -EINVAL;
1466
1467 if (rc != 0) {
1468 /* Set file size by pathname rather than by handle
1469 either because no valid, writeable file handle for
1470 it was found or because there was an error setting
1471 it by handle */
1472 rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
1473 false, cifs_sb->local_nls,
1474 cifs_sb->mnt_cifs_flags &
1475 CIFS_MOUNT_MAP_SPECIAL_CHR);
1476 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1477 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1478 __u16 netfid;
1479 int oplock = 0;
1480
1481 rc = SMBLegacyOpen(xid, pTcon, full_path,
1482 FILE_OPEN, GENERIC_WRITE,
1483 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1484 cifs_sb->local_nls,
1485 cifs_sb->mnt_cifs_flags &
1486 CIFS_MOUNT_MAP_SPECIAL_CHR);
1487 if (rc == 0) {
1488 unsigned int bytes_written;
1489 rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
1490 attrs->ia_size,
1491 &bytes_written, NULL,
1492 NULL, 1);
1493 cFYI(1, ("wrt seteof rc %d", rc));
1494 CIFSSMBClose(xid, pTcon, netfid);
1495 }
1496 }
1497 }
1498
1499 if (rc == 0) {
1500 rc = cifs_vmtruncate(inode, attrs->ia_size);
1501 cifs_truncate_page(inode->i_mapping, inode->i_size);
1502 }
1503
1504 return rc;
1505}
1506
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001507static int
Jeff Laytonfeb3e202008-08-02 07:26:12 -04001508cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
1509 char *full_path, __u32 dosattr)
1510{
1511 int rc;
1512 int oplock = 0;
1513 __u16 netfid;
1514 __u32 netpid;
1515 bool set_time = false;
1516 struct cifsFileInfo *open_file;
1517 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1518 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1519 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1520 FILE_BASIC_INFO info_buf;
1521
1522 if (attrs->ia_valid & ATTR_ATIME) {
1523 set_time = true;
1524 info_buf.LastAccessTime =
1525 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1526 } else
1527 info_buf.LastAccessTime = 0;
1528
1529 if (attrs->ia_valid & ATTR_MTIME) {
1530 set_time = true;
1531 info_buf.LastWriteTime =
1532 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1533 } else
1534 info_buf.LastWriteTime = 0;
1535
1536 /*
1537 * Samba throws this field away, but windows may actually use it.
1538 * Do not set ctime unless other time stamps are changed explicitly
1539 * (i.e. by utimes()) since we would then have a mix of client and
1540 * server times.
1541 */
1542 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1543 cFYI(1, ("CIFS - CTIME changed"));
1544 info_buf.ChangeTime =
1545 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1546 } else
1547 info_buf.ChangeTime = 0;
1548
1549 info_buf.CreationTime = 0; /* don't change */
1550 info_buf.Attributes = cpu_to_le32(dosattr);
1551
1552 /*
1553 * If the file is already open for write, just use that fileid
1554 */
1555 open_file = find_writable_file(cifsInode);
1556 if (open_file) {
1557 netfid = open_file->netfid;
1558 netpid = open_file->pid;
1559 goto set_via_filehandle;
1560 }
1561
1562 /*
1563 * NT4 apparently returns success on this call, but it doesn't
1564 * really work.
1565 */
1566 if (!(pTcon->ses->flags & CIFS_SES_NT4)) {
1567 rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
1568 &info_buf, cifs_sb->local_nls,
1569 cifs_sb->mnt_cifs_flags &
1570 CIFS_MOUNT_MAP_SPECIAL_CHR);
1571 if (rc != -EOPNOTSUPP && rc != -EINVAL)
1572 goto out;
1573 }
1574
1575 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1576 "times not supported by this server"));
1577 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1578 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1579 CREATE_NOT_DIR, &netfid, &oplock,
1580 NULL, cifs_sb->local_nls,
1581 cifs_sb->mnt_cifs_flags &
1582 CIFS_MOUNT_MAP_SPECIAL_CHR);
1583
1584 if (rc != 0) {
1585 if (rc == -EIO)
1586 rc = -EINVAL;
1587 goto out;
1588 }
1589
1590 netpid = current->tgid;
1591
1592set_via_filehandle:
1593 rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid);
1594 if (open_file == NULL)
1595 CIFSSMBClose(xid, pTcon, netfid);
1596 else
1597 atomic_dec(&open_file->wrtPending);
1598out:
1599 return rc;
1600}
1601
1602static int
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001603cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
1604{
1605 int rc;
1606 int xid;
1607 char *full_path = NULL;
1608 struct inode *inode = direntry->d_inode;
1609 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1610 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1611 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1612 struct cifs_unix_set_info_args *args = NULL;
1613
1614 cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x",
1615 direntry->d_name.name, attrs->ia_valid));
1616
1617 xid = GetXid();
1618
1619 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1620 /* check if we have permission to change attrs */
1621 rc = inode_change_ok(inode, attrs);
1622 if (rc < 0)
1623 goto out;
1624 else
1625 rc = 0;
1626 }
1627
1628 full_path = build_path_from_dentry(direntry);
1629 if (full_path == NULL) {
1630 rc = -ENOMEM;
1631 goto out;
1632 }
1633
1634 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1635 /*
1636 Flush data before changing file size or changing the last
1637 write time of the file on the server. If the
1638 flush returns error, store it to report later and continue.
1639 BB: This should be smarter. Why bother flushing pages that
1640 will be truncated anyway? Also, should we error out here if
1641 the flush returns error?
1642 */
1643 rc = filemap_write_and_wait(inode->i_mapping);
1644 if (rc != 0) {
1645 cifsInode->write_behind_rc = rc;
1646 rc = 0;
1647 }
1648 }
1649
1650 if (attrs->ia_valid & ATTR_SIZE) {
1651 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1652 if (rc != 0)
1653 goto out;
1654 }
1655
1656 /* skip mode change if it's just for clearing setuid/setgid */
1657 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1658 attrs->ia_valid &= ~ATTR_MODE;
1659
1660 args = kmalloc(sizeof(*args), GFP_KERNEL);
1661 if (args == NULL) {
1662 rc = -ENOMEM;
1663 goto out;
1664 }
1665
1666 /* set up the struct */
1667 if (attrs->ia_valid & ATTR_MODE)
1668 args->mode = attrs->ia_mode;
1669 else
1670 args->mode = NO_CHANGE_64;
1671
1672 if (attrs->ia_valid & ATTR_UID)
1673 args->uid = attrs->ia_uid;
1674 else
1675 args->uid = NO_CHANGE_64;
1676
1677 if (attrs->ia_valid & ATTR_GID)
1678 args->gid = attrs->ia_gid;
1679 else
1680 args->gid = NO_CHANGE_64;
1681
1682 if (attrs->ia_valid & ATTR_ATIME)
1683 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
1684 else
1685 args->atime = NO_CHANGE_64;
1686
1687 if (attrs->ia_valid & ATTR_MTIME)
1688 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
1689 else
1690 args->mtime = NO_CHANGE_64;
1691
1692 if (attrs->ia_valid & ATTR_CTIME)
1693 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
1694 else
1695 args->ctime = NO_CHANGE_64;
1696
1697 args->device = 0;
1698 rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args,
1699 cifs_sb->local_nls,
1700 cifs_sb->mnt_cifs_flags &
1701 CIFS_MOUNT_MAP_SPECIAL_CHR);
1702
1703 if (!rc)
1704 rc = inode_setattr(inode, attrs);
1705out:
1706 kfree(args);
1707 kfree(full_path);
1708 FreeXid(xid);
1709 return rc;
1710}
1711
Jeff Layton0510eeb2008-08-02 07:26:12 -04001712static int
1713cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714{
1715 int xid;
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001716 struct inode *inode = direntry->d_inode;
1717 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001718 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001719 char *full_path = NULL;
1720 int rc = -EACCES;
Jeff Laytonfeb3e202008-08-02 07:26:12 -04001721 __u32 dosattr = 0;
Jeff Layton4e1e7fb2008-08-02 07:26:12 -04001722 __u64 mode = NO_CHANGE_64;
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001723
Linus Torvalds1da177e2005-04-16 15:20:36 -07001724 xid = GetXid();
1725
Steve French39798772006-05-31 22:40:51 +00001726 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727 direntry->d_name.name, attrs->ia_valid));
Steve French6473a552005-11-29 20:20:10 -08001728
Steve French2a138ebb2005-11-29 21:22:19 -08001729 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
Steve French6473a552005-11-29 20:20:10 -08001730 /* check if we have permission to change attrs */
Jeff Layton02eadef2008-05-09 21:26:11 +00001731 rc = inode_change_ok(inode, attrs);
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001732 if (rc < 0) {
Steve French6473a552005-11-29 20:20:10 -08001733 FreeXid(xid);
1734 return rc;
1735 } else
1736 rc = 0;
1737 }
Steve French50c2f752007-07-13 00:33:32 +00001738
Steve French7f573562005-08-30 11:32:14 -07001739 full_path = build_path_from_dentry(direntry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740 if (full_path == NULL) {
1741 FreeXid(xid);
1742 return -ENOMEM;
1743 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744
Steve French50531442008-03-14 19:21:31 +00001745 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
Jeff Laytoncea21802007-11-20 23:19:03 +00001746 /*
Steve French50531442008-03-14 19:21:31 +00001747 Flush data before changing file size or changing the last
1748 write time of the file on the server. If the
Jeff Laytoncea21802007-11-20 23:19:03 +00001749 flush returns error, store it to report later and continue.
1750 BB: This should be smarter. Why bother flushing pages that
1751 will be truncated anyway? Also, should we error out here if
1752 the flush returns error?
1753 */
Jeff Layton02eadef2008-05-09 21:26:11 +00001754 rc = filemap_write_and_wait(inode->i_mapping);
Jeff Laytoncea21802007-11-20 23:19:03 +00001755 if (rc != 0) {
Jeff Layton02eadef2008-05-09 21:26:11 +00001756 cifsInode->write_behind_rc = rc;
Jeff Laytoncea21802007-11-20 23:19:03 +00001757 rc = 0;
1758 }
Steve French50531442008-03-14 19:21:31 +00001759 }
Jeff Laytoncea21802007-11-20 23:19:03 +00001760
Steve French50531442008-03-14 19:21:31 +00001761 if (attrs->ia_valid & ATTR_SIZE) {
Jeff Layton8efdbde2008-07-23 21:28:12 +00001762 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1763 if (rc != 0)
Steve Frenche30dcf32005-09-20 20:49:16 -07001764 goto cifs_setattr_exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 }
Jeff Layton4ca691a2008-05-22 09:33:34 -04001766
1767 /*
1768 * Without unix extensions we can't send ownership changes to the
1769 * server, so silently ignore them. This is consistent with how
1770 * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With
1771 * CIFSACL support + proper Windows to Unix idmapping, we may be
1772 * able to support this in the future.
1773 */
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001774 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
Jeff Layton4ca691a2008-05-22 09:33:34 -04001775 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776
Jeff Laytond32c4f22007-10-18 03:05:22 -07001777 /* skip mode change if it's just for clearing setuid/setgid */
1778 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1779 attrs->ia_valid &= ~ATTR_MODE;
1780
Linus Torvalds1da177e2005-04-16 15:20:36 -07001781 if (attrs->ia_valid & ATTR_MODE) {
Jeff Layton51328612008-05-22 09:33:34 -04001782 cFYI(1, ("Mode changed to 0%o", attrs->ia_mode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001783 mode = attrs->ia_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784 }
1785
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001786 if (attrs->ia_valid & ATTR_MODE) {
Steve Frenchcdbce9c2005-11-19 21:04:52 -08001787 rc = 0;
Steve French97837582007-12-31 07:47:21 +00001788#ifdef CONFIG_CIFS_EXPERIMENTAL
1789 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
Jeff Layton02eadef2008-05-09 21:26:11 +00001790 rc = mode_to_acl(inode, full_path, mode);
Jeff Layton51328612008-05-22 09:33:34 -04001791 else
Steve French97837582007-12-31 07:47:21 +00001792#endif
Jeff Layton51328612008-05-22 09:33:34 -04001793 if (((mode & S_IWUGO) == 0) &&
1794 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
Jeff Laytonfeb3e202008-08-02 07:26:12 -04001795
1796 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
1797
Jeff Layton51328612008-05-22 09:33:34 -04001798 /* fix up mode if we're not using dynperm */
1799 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
1800 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
1801 } else if ((mode & S_IWUGO) &&
1802 (cifsInode->cifsAttrs & ATTR_READONLY)) {
Jeff Laytonfeb3e202008-08-02 07:26:12 -04001803
1804 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
1805 /* Attributes of 0 are ignored */
1806 if (dosattr == 0)
1807 dosattr |= ATTR_NORMAL;
Jeff Layton51328612008-05-22 09:33:34 -04001808
1809 /* reset local inode permissions to normal */
1810 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1811 attrs->ia_mode &= ~(S_IALLUGO);
1812 if (S_ISDIR(inode->i_mode))
1813 attrs->ia_mode |=
1814 cifs_sb->mnt_dir_mode;
1815 else
1816 attrs->ia_mode |=
1817 cifs_sb->mnt_file_mode;
1818 }
1819 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1820 /* ignore mode change - ATTR_READONLY hasn't changed */
1821 attrs->ia_valid &= ~ATTR_MODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001823 }
1824
Jeff Laytonfeb3e202008-08-02 07:26:12 -04001825 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
1826 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
1827 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1828 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829
Steve Frenche30dcf32005-09-20 20:49:16 -07001830 /* Even if error on time set, no sense failing the call if
1831 the server would set the time to a reasonable value anyway,
1832 and this check ensures that we are not being called from
1833 sys_utimes in which case we ought to fail the call back to
1834 the user when the server rejects the call */
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001835 if ((rc) && (attrs->ia_valid &
Jeff Laytonfeb3e202008-08-02 07:26:12 -04001836 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
Steve Frenche30dcf32005-09-20 20:49:16 -07001837 rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838 }
1839
1840 /* do not need local check to inode_check_ok since the server does
1841 that */
1842 if (!rc)
Jeff Layton02eadef2008-05-09 21:26:11 +00001843 rc = inode_setattr(inode, attrs);
Steve Frenche30dcf32005-09-20 20:49:16 -07001844cifs_setattr_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845 kfree(full_path);
1846 FreeXid(xid);
1847 return rc;
1848}
1849
Jeff Layton0510eeb2008-08-02 07:26:12 -04001850int
1851cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1852{
1853 struct inode *inode = direntry->d_inode;
1854 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1855 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1856
1857 if (pTcon->unix_ext)
1858 return cifs_setattr_unix(direntry, attrs);
1859
1860 return cifs_setattr_nounix(direntry, attrs);
1861
1862 /* BB: add cifs_setattr_legacy for really old servers */
1863}
1864
Steve French99ee4db2007-02-27 05:35:17 +00001865#if 0
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866void cifs_delete_inode(struct inode *inode)
1867{
Steve French26a21b92006-05-31 18:05:34 +00001868 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001869 /* may have to add back in if and when safe distributed caching of
1870 directories added e.g. via FindNotify */
1871}
Steve French99ee4db2007-02-27 05:35:17 +00001872#endif