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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/inode.c
3 *
Steve French8be0ed42008-12-05 19:14:12 +00004 * Copyright (C) International Business Machines Corp., 2002,2008
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
Jeff Laytoncc0bad72009-06-25 00:56:52 -040080/* populate an inode with info from a cifs_fattr struct */
81void
82cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
Christoph Hellwig75f12982008-02-25 20:25:21 +000083{
Jeff Laytoncc0bad72009-06-25 00:56:52 -040084 struct cifsInodeInfo *cifs_i = CIFS_I(inode);
Jeff Layton0b8f18e2009-07-09 01:46:37 -040085 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
86 unsigned long oldtime = cifs_i->time;
Christoph Hellwig75f12982008-02-25 20:25:21 +000087
Jeff Laytoncc0bad72009-06-25 00:56:52 -040088 inode->i_atime = fattr->cf_atime;
89 inode->i_mtime = fattr->cf_mtime;
90 inode->i_ctime = fattr->cf_ctime;
Jeff Laytoncc0bad72009-06-25 00:56:52 -040091 inode->i_rdev = fattr->cf_rdev;
92 inode->i_nlink = fattr->cf_nlink;
93 inode->i_uid = fattr->cf_uid;
94 inode->i_gid = fattr->cf_gid;
95
Jeff Layton0b8f18e2009-07-09 01:46:37 -040096 /* if dynperm is set, don't clobber existing mode */
97 if (inode->i_state & I_NEW ||
98 !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM))
99 inode->i_mode = fattr->cf_mode;
100
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400101 cifs_i->cifsAttrs = fattr->cf_cifsattrs;
102 cifs_i->uniqueid = fattr->cf_uniqueid;
103
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400104 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
105 cifs_i->time = 0;
106 else
107 cifs_i->time = jiffies;
108
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400109 cFYI(1, ("inode 0x%p old_time=%ld new_time=%ld", inode,
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400110 oldtime, cifs_i->time));
111
112 cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING;
Christoph Hellwig75f12982008-02-25 20:25:21 +0000113
114 /*
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400115 * Can't safely change the file size here if the client is writing to
116 * it due to potential races.
Christoph Hellwig75f12982008-02-25 20:25:21 +0000117 */
Christoph Hellwig75f12982008-02-25 20:25:21 +0000118 spin_lock(&inode->i_lock);
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400119 if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) {
120 i_size_write(inode, fattr->cf_eof);
Christoph Hellwig75f12982008-02-25 20:25:21 +0000121
122 /*
123 * i_blocks is not related to (i_size / i_blksize),
124 * but instead 512 byte (2**9) size is required for
125 * calculating num blocks.
126 */
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400127 inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9;
Christoph Hellwig75f12982008-02-25 20:25:21 +0000128 }
129 spin_unlock(&inode->i_lock);
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400130
131 cifs_set_ops(inode, fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL);
Christoph Hellwig75f12982008-02-25 20:25:21 +0000132}
133
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400134/* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */
135void
136cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info,
137 struct cifs_sb_info *cifs_sb)
138{
139 memset(fattr, 0, sizeof(*fattr));
140 fattr->cf_uniqueid = le64_to_cpu(info->UniqueId);
141 fattr->cf_bytes = le64_to_cpu(info->NumOfBytes);
142 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
143
144 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
145 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime);
146 fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange);
147 fattr->cf_mode = le64_to_cpu(info->Permissions);
148
149 /*
150 * Since we set the inode type below we need to mask off
151 * to avoid strange results if bits set above.
152 */
153 fattr->cf_mode &= ~S_IFMT;
154 switch (le32_to_cpu(info->Type)) {
155 case UNIX_FILE:
156 fattr->cf_mode |= S_IFREG;
157 fattr->cf_dtype = DT_REG;
158 break;
159 case UNIX_SYMLINK:
160 fattr->cf_mode |= S_IFLNK;
161 fattr->cf_dtype = DT_LNK;
162 break;
163 case UNIX_DIR:
164 fattr->cf_mode |= S_IFDIR;
165 fattr->cf_dtype = DT_DIR;
166 break;
167 case UNIX_CHARDEV:
168 fattr->cf_mode |= S_IFCHR;
169 fattr->cf_dtype = DT_CHR;
170 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
171 le64_to_cpu(info->DevMinor) & MINORMASK);
172 break;
173 case UNIX_BLOCKDEV:
174 fattr->cf_mode |= S_IFBLK;
175 fattr->cf_dtype = DT_BLK;
176 fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor),
177 le64_to_cpu(info->DevMinor) & MINORMASK);
178 break;
179 case UNIX_FIFO:
180 fattr->cf_mode |= S_IFIFO;
181 fattr->cf_dtype = DT_FIFO;
182 break;
183 case UNIX_SOCKET:
184 fattr->cf_mode |= S_IFSOCK;
185 fattr->cf_dtype = DT_SOCK;
186 break;
187 default:
188 /* safest to call it a file if we do not know */
189 fattr->cf_mode |= S_IFREG;
190 fattr->cf_dtype = DT_REG;
191 cFYI(1, ("unknown type %d", le32_to_cpu(info->Type)));
192 break;
193 }
194
195 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
196 fattr->cf_uid = cifs_sb->mnt_uid;
197 else
198 fattr->cf_uid = le64_to_cpu(info->Uid);
199
200 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
201 fattr->cf_gid = cifs_sb->mnt_gid;
202 else
203 fattr->cf_gid = le64_to_cpu(info->Gid);
204
205 fattr->cf_nlink = le64_to_cpu(info->Nlinks);
206}
Steve Frenchb9a32602008-05-20 21:52:32 +0000207
208/*
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400209 * Fill a cifs_fattr struct with fake inode info.
210 *
211 * Needed to setup cifs_fattr data for the directory which is the
212 * junction to the new submount (ie to setup the fake directory
213 * which represents a DFS referral).
Steve Frenchb9a32602008-05-20 21:52:32 +0000214 */
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400215void
216cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb)
Steve French0e4bbde2008-05-20 19:50:46 +0000217{
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400218 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Steve French0e4bbde2008-05-20 19:50:46 +0000219
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400220 cFYI(1, ("creating fake fattr for DFS referral"));
Steve French0e4bbde2008-05-20 19:50:46 +0000221
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400222 memset(fattr, 0, sizeof(*fattr));
223 fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU;
224 fattr->cf_uid = cifs_sb->mnt_uid;
225 fattr->cf_gid = cifs_sb->mnt_gid;
226 fattr->cf_atime = CURRENT_TIME;
227 fattr->cf_ctime = CURRENT_TIME;
228 fattr->cf_mtime = CURRENT_TIME;
229 fattr->cf_nlink = 2;
230 fattr->cf_flags |= CIFS_FATTR_DFS_REFERRAL;
Steve French0e4bbde2008-05-20 19:50:46 +0000231}
232
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233int cifs_get_inode_info_unix(struct inode **pinode,
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400234 const unsigned char *full_path,
235 struct super_block *sb, int xid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236{
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400237 int rc;
Steve French0e4bbde2008-05-20 19:50:46 +0000238 FILE_UNIX_BASIC_INFO find_data;
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400239 struct cifs_fattr fattr;
240 struct cifsTconInfo *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400243 tcon = cifs_sb->tcon;
Steve French646dd532008-05-15 01:50:56 +0000244 cFYI(1, ("Getting info on %s", full_path));
Igor Mammedov79626702008-03-09 03:44:18 +0000245
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 /* could have done a find first instead but this returns more info */
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400247 rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data,
Steve French737b7582005-04-28 22:41:06 -0700248 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
249 CIFS_MOUNT_MAP_SPECIAL_CHR);
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400250
251 if (!rc) {
252 cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb);
253 } else if (rc == -EREMOTE) {
254 cifs_create_dfs_fattr(&fattr, sb);
Jeff Laytone911d0c2008-07-12 13:47:59 -0700255 rc = 0;
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400256 } else {
257 return rc;
Steve French0e4bbde2008-05-20 19:50:46 +0000258 }
259
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400260 if (*pinode == NULL) {
261 /* get new inode */
262 *pinode = cifs_iget(sb, &fattr);
263 if (!*pinode)
264 rc = -ENOMEM;
265 } else {
266 /* we already have inode, update it */
267 cifs_fattr_to_inode(*pinode, &fattr);
268 }
Steve French0e4bbde2008-05-20 19:50:46 +0000269
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 return rc;
271}
272
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400273static int
274cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path,
275 struct cifs_sb_info *cifs_sb, int xid)
Steve Frenchd6e2f2a42005-11-15 16:43:39 -0800276{
277 int rc;
Steve French4b18f2a2008-04-29 00:06:05 +0000278 int oplock = 0;
Steve Frenchd6e2f2a42005-11-15 16:43:39 -0800279 __u16 netfid;
280 struct cifsTconInfo *pTcon = cifs_sb->tcon;
Steve French86c96b42005-11-18 20:25:31 -0800281 char buf[24];
Steve Frenchd6e2f2a42005-11-15 16:43:39 -0800282 unsigned int bytes_read;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000283 char *pbuf;
Steve Frenchd6e2f2a42005-11-15 16:43:39 -0800284
285 pbuf = buf;
286
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400287 fattr->cf_mode &= ~S_IFMT;
288
289 if (fattr->cf_eof == 0) {
290 fattr->cf_mode |= S_IFIFO;
291 fattr->cf_dtype = DT_FIFO;
Steve Frenchd6e2f2a42005-11-15 16:43:39 -0800292 return 0;
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400293 } else if (fattr->cf_eof < 8) {
294 fattr->cf_mode |= S_IFREG;
295 fattr->cf_dtype = DT_REG;
Steve Frenchd6e2f2a42005-11-15 16:43:39 -0800296 return -EINVAL; /* EOPNOTSUPP? */
297 }
Steve French50c2f752007-07-13 00:33:32 +0000298
Steve Frenchd6e2f2a42005-11-15 16:43:39 -0800299 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
300 CREATE_NOT_DIR, &netfid, &oplock, NULL,
301 cifs_sb->local_nls,
302 cifs_sb->mnt_cifs_flags &
303 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000304 if (rc == 0) {
Steve Frenchec637e32005-12-12 20:53:18 -0800305 int buf_type = CIFS_NO_BUFFER;
Steve Frenchd6e2f2a42005-11-15 16:43:39 -0800306 /* Read header */
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400307 rc = CIFSSMBRead(xid, pTcon, netfid,
Steve French86c96b42005-11-18 20:25:31 -0800308 24 /* length */, 0 /* offset */,
Steve Frenchec637e32005-12-12 20:53:18 -0800309 &bytes_read, &pbuf, &buf_type);
Steve French4523cc32007-04-30 20:13:06 +0000310 if ((rc == 0) && (bytes_read >= 8)) {
311 if (memcmp("IntxBLK", pbuf, 8) == 0) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000312 cFYI(1, ("Block device"));
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400313 fattr->cf_mode |= S_IFBLK;
314 fattr->cf_dtype = DT_BLK;
Steve French4523cc32007-04-30 20:13:06 +0000315 if (bytes_read == 24) {
Steve French86c96b42005-11-18 20:25:31 -0800316 /* we have enough to decode dev num */
317 __u64 mjr; /* major */
318 __u64 mnr; /* minor */
319 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
320 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400321 fattr->cf_rdev = MKDEV(mjr, mnr);
Steve French86c96b42005-11-18 20:25:31 -0800322 }
Steve French4523cc32007-04-30 20:13:06 +0000323 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000324 cFYI(1, ("Char device"));
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400325 fattr->cf_mode |= S_IFCHR;
326 fattr->cf_dtype = DT_CHR;
Steve French4523cc32007-04-30 20:13:06 +0000327 if (bytes_read == 24) {
Steve French86c96b42005-11-18 20:25:31 -0800328 /* we have enough to decode dev num */
329 __u64 mjr; /* major */
330 __u64 mnr; /* minor */
331 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
332 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400333 fattr->cf_rdev = MKDEV(mjr, mnr);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000334 }
Steve French4523cc32007-04-30 20:13:06 +0000335 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000336 cFYI(1, ("Symlink"));
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400337 fattr->cf_mode |= S_IFLNK;
338 fattr->cf_dtype = DT_LNK;
Steve French86c96b42005-11-18 20:25:31 -0800339 } else {
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400340 fattr->cf_mode |= S_IFREG; /* file? */
341 fattr->cf_dtype = DT_REG;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000342 rc = -EOPNOTSUPP;
Steve French86c96b42005-11-18 20:25:31 -0800343 }
Steve French3020a1f2005-11-18 11:31:10 -0800344 } else {
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400345 fattr->cf_mode |= S_IFREG; /* then it is a file */
346 fattr->cf_dtype = DT_REG;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000347 rc = -EOPNOTSUPP; /* or some unknown SFU type */
348 }
Steve Frenchd6e2f2a42005-11-15 16:43:39 -0800349 CIFSSMBClose(xid, pTcon, netfid);
Steve Frenchd6e2f2a42005-11-15 16:43:39 -0800350 }
351 return rc;
Steve Frenchd6e2f2a42005-11-15 16:43:39 -0800352}
353
Steve French9e294f12005-11-17 16:59:21 -0800354#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
355
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400356/*
357 * Fetch mode bits as provided by SFU.
358 *
359 * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ?
360 */
361static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
362 struct cifs_sb_info *cifs_sb, int xid)
Steve French9e294f12005-11-17 16:59:21 -0800363{
Steve French3020a1f2005-11-18 11:31:10 -0800364#ifdef CONFIG_CIFS_XATTR
Steve French9e294f12005-11-17 16:59:21 -0800365 ssize_t rc;
366 char ea_value[4];
367 __u32 mode;
368
369 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400370 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
371 cifs_sb->mnt_cifs_flags &
372 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve French4523cc32007-04-30 20:13:06 +0000373 if (rc < 0)
Steve French9e294f12005-11-17 16:59:21 -0800374 return (int)rc;
375 else if (rc > 3) {
376 mode = le32_to_cpu(*((__le32 *)ea_value));
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400377 fattr->cf_mode &= ~SFBITS_MASK;
378 cFYI(1, ("special bits 0%o org mode 0%o", mode,
379 fattr->cf_mode));
380 fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000381 cFYI(1, ("special mode bits 0%o", mode));
Steve French9e294f12005-11-17 16:59:21 -0800382 }
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400383
384 return 0;
Steve French3020a1f2005-11-18 11:31:10 -0800385#else
386 return -EOPNOTSUPP;
387#endif
Steve French9e294f12005-11-17 16:59:21 -0800388}
389
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400390/* Fill a cifs_fattr struct with info from FILE_ALL_INFO */
391void
392cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
393 struct cifs_sb_info *cifs_sb, bool adjust_tz)
Steve Frenchb9a32602008-05-20 21:52:32 +0000394{
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400395 memset(fattr, 0, sizeof(*fattr));
396 fattr->cf_cifsattrs = le32_to_cpu(info->Attributes);
397 if (info->DeletePending)
398 fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING;
Steve Frenchb9a32602008-05-20 21:52:32 +0000399
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400400 if (info->LastAccessTime)
401 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
402 else
403 fattr->cf_atime = CURRENT_TIME;
404
405 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
406 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
407
408 if (adjust_tz) {
409 fattr->cf_ctime.tv_sec += cifs_sb->tcon->ses->server->timeAdj;
410 fattr->cf_mtime.tv_sec += cifs_sb->tcon->ses->server->timeAdj;
411 }
412
413 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
414 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
415
416 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
417 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
418 fattr->cf_dtype = DT_DIR;
419 } else {
420 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
421 fattr->cf_dtype = DT_REG;
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400422
Jeff Laytond0c280d2009-07-09 01:46:44 -0400423 /* clear write bits if ATTR_READONLY is set */
424 if (fattr->cf_cifsattrs & ATTR_READONLY)
425 fattr->cf_mode &= ~(S_IWUGO);
426 }
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400427
428 fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks);
429
430 fattr->cf_uid = cifs_sb->mnt_uid;
431 fattr->cf_gid = cifs_sb->mnt_gid;
Steve Frenchb9a32602008-05-20 21:52:32 +0000432}
433
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434int cifs_get_inode_info(struct inode **pinode,
Steve French646dd532008-05-15 01:50:56 +0000435 const unsigned char *full_path, FILE_ALL_INFO *pfindData,
Steve French8b1327f2008-03-14 22:37:16 +0000436 struct super_block *sb, int xid, const __u16 *pfid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437{
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400438 int rc = 0, tmprc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 struct cifsTconInfo *pTcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 char *buf = NULL;
Steve French5ade9de2008-05-02 20:56:23 +0000442 bool adjustTZ = false;
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400443 struct cifs_fattr fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
445 pTcon = cifs_sb->tcon;
Steve French646dd532008-05-15 01:50:56 +0000446 cFYI(1, ("Getting info on %s", full_path));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
Steve Frenchd0d2f2d2005-06-02 15:12:36 -0700448 if ((pfindData == NULL) && (*pinode != NULL)) {
449 if (CIFS_I(*pinode)->clientCanCacheRead) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000450 cFYI(1, ("No need to revalidate cached inode sizes"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 return rc;
452 }
453 }
454
455 /* if file info not passed in then get it from server */
Steve Frenchd0d2f2d2005-06-02 15:12:36 -0700456 if (pfindData == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
Steve Frenchd0d2f2d2005-06-02 15:12:36 -0700458 if (buf == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 return -ENOMEM;
460 pfindData = (FILE_ALL_INFO *)buf;
Igor Mammedov79626702008-03-09 03:44:18 +0000461
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 /* could do find first instead but this returns more info */
Igor Mammedov79626702008-03-09 03:44:18 +0000463 rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
Steve Frenchacf1a1b2006-10-12 03:28:28 +0000464 0 /* not legacy */,
Steve French6b8edfe2005-08-23 20:26:03 -0700465 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
Steve French737b7582005-04-28 22:41:06 -0700466 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve French6b8edfe2005-08-23 20:26:03 -0700467 /* BB optimize code so we do not make the above call
468 when server claims no NT SMB support and the above call
469 failed at least once - set flag in tcon or mount */
Steve French4523cc32007-04-30 20:13:06 +0000470 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
Igor Mammedov79626702008-03-09 03:44:18 +0000471 rc = SMBQueryInformation(xid, pTcon, full_path,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000472 pfindData, cifs_sb->local_nls,
Steve French6b8edfe2005-08-23 20:26:03 -0700473 cifs_sb->mnt_cifs_flags &
474 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve French4b18f2a2008-04-29 00:06:05 +0000475 adjustTZ = true;
Steve French6b8edfe2005-08-23 20:26:03 -0700476 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 }
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400478
479 if (!rc) {
480 cifs_all_info_to_fattr(&fattr, (FILE_ALL_INFO *) pfindData,
481 cifs_sb, adjustTZ);
482 } else if (rc == -EREMOTE) {
483 cifs_create_dfs_fattr(&fattr, sb);
Steve Frenchb9a32602008-05-20 21:52:32 +0000484 rc = 0;
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400485 } else {
Igor Mammedov79626702008-03-09 03:44:18 +0000486 goto cgii_exit;
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400487 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400489 /*
490 * If an inode wasn't passed in, then get the inode number
491 *
492 * Is an i_ino of zero legal? Can we use that to check if the server
493 * supports returning inode numbers? Are there other sanity checks we
494 * can use to ensure that the server is really filling in that field?
495 *
496 * We can not use the IndexNumber field by default from Windows or
497 * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA
498 * CIFS spec claims that this value is unique within the scope of a
499 * share, and the windows docs hint that it's actually unique
500 * per-machine.
501 *
502 * There may be higher info levels that work but are there Windows
503 * server or network appliances for which IndexNumber field is not
504 * guaranteed unique?
505 */
Steve Frenchb9a32602008-05-20 21:52:32 +0000506 if (*pinode == NULL) {
Steve Frenchb9a32602008-05-20 21:52:32 +0000507 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
508 int rc1 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
Steve Frenchb9a32602008-05-20 21:52:32 +0000510 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400511 full_path, &fattr.cf_uniqueid,
Steve French737b7582005-04-28 22:41:06 -0700512 cifs_sb->local_nls,
513 cifs_sb->mnt_cifs_flags &
514 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve Frenchb9a32602008-05-20 21:52:32 +0000515 if (rc1) {
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400516 cFYI(1, ("GetSrvInodeNum rc %d", rc1));
517 fattr.cf_uniqueid = iunique(sb, ROOT_I);
Jeff Laytonce6e7fc2009-07-22 15:08:58 -0400518 /* disable serverino if call not supported */
519 if (rc1 == -EINVAL)
520 cifs_sb->mnt_cifs_flags &=
521 ~CIFS_MOUNT_SERVER_INUM;
Jeff Layton132ac7b2009-02-10 07:33:57 -0500522 }
Jeff Layton132ac7b2009-02-10 07:33:57 -0500523 } else {
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400524 fattr.cf_uniqueid = iunique(sb, ROOT_I);
Jeff Layton132ac7b2009-02-10 07:33:57 -0500525 }
Steve Frenchb9a32602008-05-20 21:52:32 +0000526 } else {
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400527 fattr.cf_uniqueid = CIFS_I(*pinode)->uniqueid;
Steve Frenchb9a32602008-05-20 21:52:32 +0000528 }
529
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400530 /* query for SFU type info if supported and needed */
531 if (fattr.cf_cifsattrs & ATTR_SYSTEM &&
532 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
533 tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid);
534 if (tmprc)
535 cFYI(1, ("cifs_sfu_type failed: %d", tmprc));
Steve Frenchb9a32602008-05-20 21:52:32 +0000536 }
Steve Frenchb9a32602008-05-20 21:52:32 +0000537
Steve Frenchb9a32602008-05-20 21:52:32 +0000538#ifdef CONFIG_CIFS_EXPERIMENTAL
539 /* fill in 0777 bits from ACL */
540 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
541 cFYI(1, ("Getting mode bits from ACL"));
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400542 cifs_acl_to_fattr(cifs_sb, &fattr, *pinode, full_path, pfid);
Steve Frenchb9a32602008-05-20 21:52:32 +0000543 }
544#endif
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400545
546 /* fill in remaining high mode bits e.g. SUID, VTX */
547 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
548 cifs_sfu_mode(&fattr, full_path, cifs_sb, xid);
549
550 if (!*pinode) {
551 *pinode = cifs_iget(sb, &fattr);
552 if (!*pinode)
553 rc = -ENOMEM;
554 } else {
555 cifs_fattr_to_inode(*pinode, &fattr);
Steve Frenchb9a32602008-05-20 21:52:32 +0000556 }
557
Igor Mammedov79626702008-03-09 03:44:18 +0000558cgii_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 kfree(buf);
560 return rc;
561}
562
Steve French7f8ed422007-09-28 22:28:55 +0000563static const struct inode_operations cifs_ipc_inode_ops = {
564 .lookup = cifs_lookup,
565};
566
Igor Mammedove4cce942009-02-10 14:10:26 +0300567char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb)
Steve French8be0ed42008-12-05 19:14:12 +0000568{
569 int pplen = cifs_sb->prepathlen;
570 int dfsplen;
571 char *full_path = NULL;
572
573 /* if no prefix path, simply set path to the root of share to "" */
574 if (pplen == 0) {
575 full_path = kmalloc(1, GFP_KERNEL);
576 if (full_path)
577 full_path[0] = 0;
578 return full_path;
579 }
580
581 if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS))
582 dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1);
583 else
584 dfsplen = 0;
585
586 full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL);
587 if (full_path == NULL)
588 return full_path;
589
590 if (dfsplen) {
591 strncpy(full_path, cifs_sb->tcon->treeName, dfsplen);
592 /* switch slash direction in prepath depending on whether
593 * windows or posix style path names
594 */
595 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
596 int i;
597 for (i = 0; i < dfsplen; i++) {
598 if (full_path[i] == '\\')
599 full_path[i] = '/';
600 }
601 }
602 }
603 strncpy(full_path + dfsplen, cifs_sb->prepath, pplen);
604 full_path[dfsplen + pplen] = 0; /* add trailing null */
605 return full_path;
606}
607
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400608static int
609cifs_find_inode(struct inode *inode, void *opaque)
610{
611 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
612
613 if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
614 return 0;
615
616 return 1;
617}
618
619static int
620cifs_init_inode(struct inode *inode, void *opaque)
621{
622 struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
623
624 CIFS_I(inode)->uniqueid = fattr->cf_uniqueid;
625 return 0;
626}
627
628/* Given fattrs, get a corresponding inode */
629struct inode *
630cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
631{
632 unsigned long hash;
633 struct inode *inode;
634
635 cFYI(1, ("looking for uniqueid=%llu", fattr->cf_uniqueid));
636
637 /* hash down to 32-bits on 32-bit arch */
638 hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid);
639
640 inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr);
641
642 /* we have fattrs in hand, update the inode */
643 if (inode) {
644 cifs_fattr_to_inode(inode, fattr);
645 if (sb->s_flags & MS_NOATIME)
646 inode->i_flags |= S_NOATIME | S_NOCMTIME;
647 if (inode->i_state & I_NEW) {
648 inode->i_ino = hash;
649 unlock_new_inode(inode);
650 }
651 }
652
653 return inode;
654}
655
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656/* gets root inode */
Jeff Laytonbd433d42009-05-27 09:37:34 -0400657struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658{
David Howellsce634ab2008-02-07 00:15:33 -0800659 int xid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 struct cifs_sb_info *cifs_sb;
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400661 struct inode *inode = NULL;
David Howellsce634ab2008-02-07 00:15:33 -0800662 long rc;
Steve French8be0ed42008-12-05 19:14:12 +0000663 char *full_path;
David Howellsce634ab2008-02-07 00:15:33 -0800664
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400665 cifs_sb = CIFS_SB(sb);
Igor Mammedove4cce942009-02-10 14:10:26 +0300666 full_path = cifs_build_path_to_root(cifs_sb);
Steve French8be0ed42008-12-05 19:14:12 +0000667 if (full_path == NULL)
668 return ERR_PTR(-ENOMEM);
Steve Frenchc18c8422007-07-18 23:21:09 +0000669
Steve French8be0ed42008-12-05 19:14:12 +0000670 xid = GetXid();
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400671 if (cifs_sb->tcon->unix_ext)
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400672 rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400673 else
674 rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
Steve French8be0ed42008-12-05 19:14:12 +0000675 xid, NULL);
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400676
677 if (!inode)
678 return ERR_PTR(-ENOMEM);
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400679
Steve French7f8ed422007-09-28 22:28:55 +0000680 if (rc && cifs_sb->tcon->ipc) {
681 cFYI(1, ("ipc connection - fake read inode"));
682 inode->i_mode |= S_IFDIR;
683 inode->i_nlink = 2;
684 inode->i_op = &cifs_ipc_inode_ops;
685 inode->i_fop = &simple_dir_operations;
686 inode->i_uid = cifs_sb->mnt_uid;
687 inode->i_gid = cifs_sb->mnt_gid;
Steve Frenchad661332008-08-12 14:14:40 +0000688 } else if (rc) {
Steve French8be0ed42008-12-05 19:14:12 +0000689 kfree(full_path);
David Howellsce634ab2008-02-07 00:15:33 -0800690 _FreeXid(xid);
691 iget_failed(inode);
692 return ERR_PTR(rc);
Steve French7f8ed422007-09-28 22:28:55 +0000693 }
694
David Howellsce634ab2008-02-07 00:15:33 -0800695
Steve French8be0ed42008-12-05 19:14:12 +0000696 kfree(full_path);
David Howellsce634ab2008-02-07 00:15:33 -0800697 /* can not call macro FreeXid here since in a void func
698 * TODO: This is no longer true
699 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 _FreeXid(xid);
David Howellsce634ab2008-02-07 00:15:33 -0800701 return inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702}
703
Steve French388e57b2008-09-16 23:50:58 +0000704static int
705cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
706 char *full_path, __u32 dosattr)
707{
708 int rc;
709 int oplock = 0;
710 __u16 netfid;
711 __u32 netpid;
712 bool set_time = false;
713 struct cifsFileInfo *open_file;
714 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
715 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
716 struct cifsTconInfo *pTcon = cifs_sb->tcon;
717 FILE_BASIC_INFO info_buf;
718
Steve French1adcb712009-02-25 14:19:56 +0000719 if (attrs == NULL)
720 return -EINVAL;
721
Steve French388e57b2008-09-16 23:50:58 +0000722 if (attrs->ia_valid & ATTR_ATIME) {
723 set_time = true;
724 info_buf.LastAccessTime =
725 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
726 } else
727 info_buf.LastAccessTime = 0;
728
729 if (attrs->ia_valid & ATTR_MTIME) {
730 set_time = true;
731 info_buf.LastWriteTime =
732 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
733 } else
734 info_buf.LastWriteTime = 0;
735
736 /*
737 * Samba throws this field away, but windows may actually use it.
738 * Do not set ctime unless other time stamps are changed explicitly
739 * (i.e. by utimes()) since we would then have a mix of client and
740 * server times.
741 */
742 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
743 cFYI(1, ("CIFS - CTIME changed"));
744 info_buf.ChangeTime =
745 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
746 } else
747 info_buf.ChangeTime = 0;
748
749 info_buf.CreationTime = 0; /* don't change */
750 info_buf.Attributes = cpu_to_le32(dosattr);
751
752 /*
753 * If the file is already open for write, just use that fileid
754 */
755 open_file = find_writable_file(cifsInode);
756 if (open_file) {
757 netfid = open_file->netfid;
758 netpid = open_file->pid;
759 goto set_via_filehandle;
760 }
761
762 /*
763 * NT4 apparently returns success on this call, but it doesn't
764 * really work.
765 */
766 if (!(pTcon->ses->flags & CIFS_SES_NT4)) {
767 rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
768 &info_buf, cifs_sb->local_nls,
769 cifs_sb->mnt_cifs_flags &
770 CIFS_MOUNT_MAP_SPECIAL_CHR);
Jeff Layton6b37faa2008-10-06 21:54:41 +0000771 if (rc == 0) {
772 cifsInode->cifsAttrs = dosattr;
773 goto out;
774 } else if (rc != -EOPNOTSUPP && rc != -EINVAL)
Steve French388e57b2008-09-16 23:50:58 +0000775 goto out;
776 }
777
778 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
779 "times not supported by this server"));
780 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
781 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
782 CREATE_NOT_DIR, &netfid, &oplock,
783 NULL, cifs_sb->local_nls,
784 cifs_sb->mnt_cifs_flags &
785 CIFS_MOUNT_MAP_SPECIAL_CHR);
786
787 if (rc != 0) {
788 if (rc == -EIO)
789 rc = -EINVAL;
790 goto out;
791 }
792
793 netpid = current->tgid;
794
795set_via_filehandle:
796 rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid);
Steve Frenchd3889082008-09-24 19:22:52 +0000797 if (!rc)
798 cifsInode->cifsAttrs = dosattr;
799
Steve French388e57b2008-09-16 23:50:58 +0000800 if (open_file == NULL)
801 CIFSSMBClose(xid, pTcon, netfid);
802 else
803 atomic_dec(&open_file->wrtPending);
804out:
805 return rc;
806}
807
Jeff Laytona12a1ac2008-09-23 11:48:35 -0400808/*
809 * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit
810 * and rename it to a random name that hopefully won't conflict with
811 * anything else.
812 */
813static int
Steve French32709582008-10-20 00:44:19 +0000814cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid)
Jeff Laytona12a1ac2008-09-23 11:48:35 -0400815{
816 int oplock = 0;
817 int rc;
818 __u16 netfid;
Steve French32709582008-10-20 00:44:19 +0000819 struct inode *inode = dentry->d_inode;
Jeff Laytona12a1ac2008-09-23 11:48:35 -0400820 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
821 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
822 struct cifsTconInfo *tcon = cifs_sb->tcon;
Steve French32709582008-10-20 00:44:19 +0000823 __u32 dosattr, origattr;
824 FILE_BASIC_INFO *info_buf = NULL;
Jeff Laytona12a1ac2008-09-23 11:48:35 -0400825
826 rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN,
Jeff Laytondd1db2d2008-10-16 19:27:12 -0400827 DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR,
Jeff Laytona12a1ac2008-09-23 11:48:35 -0400828 &netfid, &oplock, NULL, cifs_sb->local_nls,
829 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
830 if (rc != 0)
831 goto out;
832
Steve French32709582008-10-20 00:44:19 +0000833 origattr = cifsInode->cifsAttrs;
834 if (origattr == 0)
835 origattr |= ATTR_NORMAL;
836
837 dosattr = origattr & ~ATTR_READONLY;
Jeff Laytona12a1ac2008-09-23 11:48:35 -0400838 if (dosattr == 0)
839 dosattr |= ATTR_NORMAL;
840 dosattr |= ATTR_HIDDEN;
841
Steve French32709582008-10-20 00:44:19 +0000842 /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
843 if (dosattr != origattr) {
844 info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
845 if (info_buf == NULL) {
846 rc = -ENOMEM;
847 goto out_close;
848 }
849 info_buf->Attributes = cpu_to_le32(dosattr);
850 rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
851 current->tgid);
852 /* although we would like to mark the file hidden
853 if that fails we will still try to rename it */
Steve French41346092008-10-20 18:24:42 +0000854 if (rc != 0)
Steve French32709582008-10-20 00:44:19 +0000855 cifsInode->cifsAttrs = dosattr;
856 else
857 dosattr = origattr; /* since not able to change them */
Jeff Laytona12a1ac2008-09-23 11:48:35 -0400858 }
Jeff Laytona12a1ac2008-09-23 11:48:35 -0400859
Jeff Laytondd1db2d2008-10-16 19:27:12 -0400860 /* rename the file */
861 rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls,
Jeff Laytona12a1ac2008-09-23 11:48:35 -0400862 cifs_sb->mnt_cifs_flags &
863 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve French32709582008-10-20 00:44:19 +0000864 if (rc != 0) {
865 rc = -ETXTBSY;
866 goto undo_setattr;
867 }
Jeff Layton6d22f092008-09-23 11:48:35 -0400868
Steve French32709582008-10-20 00:44:19 +0000869 /* try to set DELETE_ON_CLOSE */
870 if (!cifsInode->delete_pending) {
871 rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid,
872 current->tgid);
873 /*
874 * some samba versions return -ENOENT when we try to set the
875 * file disposition here. Likely a samba bug, but work around
876 * it for now. This means that some cifsXXX files may hang
877 * around after they shouldn't.
878 *
879 * BB: remove this hack after more servers have the fix
880 */
881 if (rc == -ENOENT)
882 rc = 0;
883 else if (rc != 0) {
884 rc = -ETXTBSY;
885 goto undo_rename;
886 }
887 cifsInode->delete_pending = true;
888 }
Jeff Layton7ce86d52008-09-24 11:32:59 -0400889
Jeff Laytona12a1ac2008-09-23 11:48:35 -0400890out_close:
891 CIFSSMBClose(xid, tcon, netfid);
892out:
Steve French32709582008-10-20 00:44:19 +0000893 kfree(info_buf);
Jeff Laytona12a1ac2008-09-23 11:48:35 -0400894 return rc;
Steve French32709582008-10-20 00:44:19 +0000895
896 /*
897 * reset everything back to the original state. Don't bother
898 * dealing with errors here since we can't do anything about
899 * them anyway.
900 */
901undo_rename:
902 CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name,
903 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
904 CIFS_MOUNT_MAP_SPECIAL_CHR);
905undo_setattr:
906 if (dosattr != origattr) {
907 info_buf->Attributes = cpu_to_le32(origattr);
908 if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
909 current->tgid))
910 cifsInode->cifsAttrs = origattr;
911 }
912
913 goto out_close;
Jeff Laytona12a1ac2008-09-23 11:48:35 -0400914}
915
Steve Frenchff694522009-04-20 19:45:13 +0000916
917/*
918 * If dentry->d_inode is null (usually meaning the cached dentry
919 * is a negative dentry) then we would attempt a standard SMB delete, but
920 * if that fails we can not attempt the fall back mechanisms on EACESS
921 * but will return the EACESS to the caller. Note that the VFS does not call
922 * unlink on negative dentries currently.
923 */
Jeff Layton5f0319a2008-09-16 14:05:16 -0400924int cifs_unlink(struct inode *dir, struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925{
926 int rc = 0;
927 int xid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 char *full_path = NULL;
Jeff Layton5f0319a2008-09-16 14:05:16 -0400929 struct inode *inode = dentry->d_inode;
Steve Frenchff694522009-04-20 19:45:13 +0000930 struct cifsInodeInfo *cifs_inode;
Jeff Layton5f0319a2008-09-16 14:05:16 -0400931 struct super_block *sb = dir->i_sb;
932 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
933 struct cifsTconInfo *tcon = cifs_sb->tcon;
Steve French60502472008-10-07 18:42:52 +0000934 struct iattr *attrs = NULL;
935 __u32 dosattr = 0, origattr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936
Jeff Layton5f0319a2008-09-16 14:05:16 -0400937 cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938
939 xid = GetXid();
940
Jeff Layton5f0319a2008-09-16 14:05:16 -0400941 /* Unlink can be called from rename so we can not take the
942 * sb->s_vfs_rename_mutex here */
943 full_path = build_path_from_dentry(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 if (full_path == NULL) {
Suresh Jayaraman0f3bc092009-06-25 18:12:34 +0530945 rc = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 FreeXid(xid);
Suresh Jayaraman0f3bc092009-06-25 18:12:34 +0530947 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 }
Steve French2d785a52007-07-15 01:48:57 +0000949
Jeff Layton5f0319a2008-09-16 14:05:16 -0400950 if ((tcon->ses->capabilities & CAP_UNIX) &&
Steve French2d785a52007-07-15 01:48:57 +0000951 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
Jeff Layton5f0319a2008-09-16 14:05:16 -0400952 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
953 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
Steve French2d785a52007-07-15 01:48:57 +0000954 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
955 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
956 cFYI(1, ("posix del rc %d", rc));
957 if ((rc == 0) || (rc == -ENOENT))
958 goto psx_del_no_retry;
959 }
960
Steve French60502472008-10-07 18:42:52 +0000961retry_std_delete:
Jeff Layton5f0319a2008-09-16 14:05:16 -0400962 rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls,
Steve French737b7582005-04-28 22:41:06 -0700963 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve French60502472008-10-07 18:42:52 +0000964
Steve French2d785a52007-07-15 01:48:57 +0000965psx_del_no_retry:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 if (!rc) {
Jeff Layton5f0319a2008-09-16 14:05:16 -0400967 if (inode)
968 drop_nlink(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969 } else if (rc == -ENOENT) {
Jeff Layton5f0319a2008-09-16 14:05:16 -0400970 d_drop(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 } else if (rc == -ETXTBSY) {
Steve French32709582008-10-20 00:44:19 +0000972 rc = cifs_rename_pending_delete(full_path, dentry, xid);
Jeff Laytona12a1ac2008-09-23 11:48:35 -0400973 if (rc == 0)
974 drop_nlink(inode);
Steve Frenchff694522009-04-20 19:45:13 +0000975 } else if ((rc == -EACCES) && (dosattr == 0) && inode) {
Steve French388e57b2008-09-16 23:50:58 +0000976 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
977 if (attrs == NULL) {
978 rc = -ENOMEM;
979 goto out_reval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 }
Steve French388e57b2008-09-16 23:50:58 +0000981
982 /* try to reset dos attributes */
Steve Frenchff694522009-04-20 19:45:13 +0000983 cifs_inode = CIFS_I(inode);
984 origattr = cifs_inode->cifsAttrs;
Steve French60502472008-10-07 18:42:52 +0000985 if (origattr == 0)
986 origattr |= ATTR_NORMAL;
987 dosattr = origattr & ~ATTR_READONLY;
Steve French388e57b2008-09-16 23:50:58 +0000988 if (dosattr == 0)
989 dosattr |= ATTR_NORMAL;
990 dosattr |= ATTR_HIDDEN;
991
992 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
Steve French388e57b2008-09-16 23:50:58 +0000993 if (rc != 0)
994 goto out_reval;
Steve French60502472008-10-07 18:42:52 +0000995
996 goto retry_std_delete;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 }
Steve French60502472008-10-07 18:42:52 +0000998
999 /* undo the setattr if we errored out and it's needed */
1000 if (rc != 0 && dosattr != 0)
1001 cifs_set_file_info(inode, attrs, xid, full_path, origattr);
1002
Steve French388e57b2008-09-16 23:50:58 +00001003out_reval:
Jeff Layton5f0319a2008-09-16 14:05:16 -04001004 if (inode) {
Steve Frenchff694522009-04-20 19:45:13 +00001005 cifs_inode = CIFS_I(inode);
1006 cifs_inode->time = 0; /* will force revalidate to get info
Steve Frenchb2aeb9d2005-05-17 13:16:18 -05001007 when needed */
Jeff Layton5f0319a2008-09-16 14:05:16 -04001008 inode->i_ctime = current_fs_time(sb);
Steve Frenchb2aeb9d2005-05-17 13:16:18 -05001009 }
Jeff Layton5f0319a2008-09-16 14:05:16 -04001010 dir->i_ctime = dir->i_mtime = current_fs_time(sb);
Steve Frenchff694522009-04-20 19:45:13 +00001011 cifs_inode = CIFS_I(dir);
Steve French60502472008-10-07 18:42:52 +00001012 CIFS_I(dir)->time = 0; /* force revalidate of dir as well */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013
1014 kfree(full_path);
Steve French60502472008-10-07 18:42:52 +00001015 kfree(attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 FreeXid(xid);
1017 return rc;
1018}
1019
1020int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
1021{
Jeff Layton6b37faa2008-10-06 21:54:41 +00001022 int rc = 0, tmprc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 int xid;
1024 struct cifs_sb_info *cifs_sb;
1025 struct cifsTconInfo *pTcon;
1026 char *full_path = NULL;
1027 struct inode *newinode = NULL;
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001028 struct cifs_fattr fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029
Steve French6473a552005-11-29 20:20:10 -08001030 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031
1032 xid = GetXid();
1033
1034 cifs_sb = CIFS_SB(inode->i_sb);
1035 pTcon = cifs_sb->tcon;
1036
Steve French7f573562005-08-30 11:32:14 -07001037 full_path = build_path_from_dentry(direntry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 if (full_path == NULL) {
Suresh Jayaraman0f3bc092009-06-25 18:12:34 +05301039 rc = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 FreeXid(xid);
Suresh Jayaraman0f3bc092009-06-25 18:12:34 +05301041 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 }
Steve French50c2f752007-07-13 00:33:32 +00001043
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001044 if ((pTcon->ses->capabilities & CAP_UNIX) &&
1045 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
Steve French2dd29d32007-04-23 22:07:35 +00001046 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
1047 u32 oplock = 0;
Steve Frenchf6d09982008-01-08 23:18:22 +00001048 FILE_UNIX_BASIC_INFO *pInfo =
Steve French2dd29d32007-04-23 22:07:35 +00001049 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001050 if (pInfo == NULL) {
Steve French2dd29d32007-04-23 22:07:35 +00001051 rc = -ENOMEM;
1052 goto mkdir_out;
1053 }
Steve French50c2f752007-07-13 00:33:32 +00001054
Al Viroce3b0f82009-03-29 19:08:22 -04001055 mode &= ~current_umask();
Steve French2dd29d32007-04-23 22:07:35 +00001056 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
1057 mode, NULL /* netfid */, pInfo, &oplock,
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001058 full_path, cifs_sb->local_nls,
1059 cifs_sb->mnt_cifs_flags &
Steve French2dd29d32007-04-23 22:07:35 +00001060 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve Frenchc45d7072007-09-17 02:04:21 +00001061 if (rc == -EOPNOTSUPP) {
1062 kfree(pInfo);
1063 goto mkdir_retry_old;
1064 } else if (rc) {
Steve French2dd29d32007-04-23 22:07:35 +00001065 cFYI(1, ("posix mkdir returned 0x%x", rc));
1066 d_drop(direntry);
1067 } else {
Cyril Gorcunov8f2376a2007-10-14 17:58:43 +00001068 if (pInfo->Type == cpu_to_le32(-1)) {
1069 /* no return info, go query for it */
Steve French5a07cdf2007-09-16 23:12:47 +00001070 kfree(pInfo);
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001071 goto mkdir_get_info;
Steve French5a07cdf2007-09-16 23:12:47 +00001072 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001073/*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
1074 to set uid/gid */
Steve French2dd29d32007-04-23 22:07:35 +00001075 inc_nlink(inode);
1076 if (pTcon->nocase)
1077 direntry->d_op = &cifs_ci_dentry_ops;
1078 else
1079 direntry->d_op = &cifs_dentry_ops;
Steve Frenchcbac3cb2007-04-25 11:46:06 +00001080
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001081 cifs_unix_basic_to_fattr(&fattr, pInfo, cifs_sb);
1082 newinode = cifs_iget(inode->i_sb, &fattr);
1083 if (!newinode) {
Steve French5a07cdf2007-09-16 23:12:47 +00001084 kfree(pInfo);
Steve Frenchcbac3cb2007-04-25 11:46:06 +00001085 goto mkdir_get_info;
Steve French5a07cdf2007-09-16 23:12:47 +00001086 }
Jeff Layton6b37faa2008-10-06 21:54:41 +00001087
Steve French2dd29d32007-04-23 22:07:35 +00001088 d_instantiate(direntry, newinode);
Steve Frenchcbac3cb2007-04-25 11:46:06 +00001089
Steve Frenchcbac3cb2007-04-25 11:46:06 +00001090#ifdef CONFIG_CIFS_DEBUG2
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001091 cFYI(1, ("instantiated dentry %p %s to inode %p",
Steve Frenchcbac3cb2007-04-25 11:46:06 +00001092 direntry, direntry->d_name.name, newinode));
1093
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001094 if (newinode->i_nlink != 2)
1095 cFYI(1, ("unexpected number of links %d",
Steve Frenchcbac3cb2007-04-25 11:46:06 +00001096 newinode->i_nlink));
1097#endif
Steve French2dd29d32007-04-23 22:07:35 +00001098 }
1099 kfree(pInfo);
1100 goto mkdir_out;
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001101 }
Steve Frenchc45d7072007-09-17 02:04:21 +00001102mkdir_retry_old:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 /* BB add setting the equivalent of mode via CreateX w/ACLs */
Steve French737b7582005-04-28 22:41:06 -07001104 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1105 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 if (rc) {
Steve French26a21b92006-05-31 18:05:34 +00001107 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 d_drop(direntry);
1109 } else {
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001110mkdir_get_info:
Dave Hansend8c76e62006-09-30 23:29:04 -07001111 inc_nlink(inode);
Steve Frenchc18c8422007-07-18 23:21:09 +00001112 if (pTcon->unix_ext)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 rc = cifs_get_inode_info_unix(&newinode, full_path,
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001114 inode->i_sb, xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 else
1116 rc = cifs_get_inode_info(&newinode, full_path, NULL,
Steve French8b1327f2008-03-14 22:37:16 +00001117 inode->i_sb, xid, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118
Steve Frenchb92327f2005-08-22 20:09:43 -07001119 if (pTcon->nocase)
1120 direntry->d_op = &cifs_ci_dentry_ops;
1121 else
1122 direntry->d_op = &cifs_dentry_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123 d_instantiate(direntry, newinode);
Steve French2dd29d32007-04-23 22:07:35 +00001124 /* setting nlink not necessary except in cases where we
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001125 * failed to get it from the server or was set bogus */
Steve French2dd29d32007-04-23 22:07:35 +00001126 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001127 direntry->d_inode->i_nlink = 2;
Jeff Layton95089912008-08-06 04:39:02 +00001128
Al Viroce3b0f82009-03-29 19:08:22 -04001129 mode &= ~current_umask();
Jeff Layton95089912008-08-06 04:39:02 +00001130 /* must turn on setgid bit if parent dir has it */
1131 if (inode->i_mode & S_ISGID)
1132 mode |= S_ISGID;
1133
Steve Frenchc18c8422007-07-18 23:21:09 +00001134 if (pTcon->unix_ext) {
Jeff Layton4e1e7fb2008-08-02 07:26:12 -04001135 struct cifs_unix_set_info_args args = {
1136 .mode = mode,
1137 .ctime = NO_CHANGE_64,
1138 .atime = NO_CHANGE_64,
1139 .mtime = NO_CHANGE_64,
1140 .device = 0,
1141 };
Steve Frenchd0d2f2d2005-06-02 15:12:36 -07001142 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
David Howellsa001e5b2008-11-14 10:38:47 +11001143 args.uid = (__u64)current_fsuid();
Jeff Layton95089912008-08-06 04:39:02 +00001144 if (inode->i_mode & S_ISGID)
1145 args.gid = (__u64)inode->i_gid;
1146 else
David Howellsa001e5b2008-11-14 10:38:47 +11001147 args.gid = (__u64)current_fsgid();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 } else {
Jeff Layton4e1e7fb2008-08-02 07:26:12 -04001149 args.uid = NO_CHANGE_64;
1150 args.gid = NO_CHANGE_64;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 }
Jeff Layton01ea95e2009-07-09 20:02:49 -04001152 CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args,
1153 cifs_sb->local_nls,
1154 cifs_sb->mnt_cifs_flags &
1155 CIFS_MOUNT_MAP_SPECIAL_CHR);
Steve French3ce53fc2007-06-08 14:55:14 +00001156 } else {
Jeff Layton67750fb2008-05-09 22:28:02 +00001157 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1158 (mode & S_IWUGO) == 0) {
1159 FILE_BASIC_INFO pInfo;
Jeff Layton6b37faa2008-10-06 21:54:41 +00001160 struct cifsInodeInfo *cifsInode;
1161 u32 dosattrs;
1162
Jeff Layton67750fb2008-05-09 22:28:02 +00001163 memset(&pInfo, 0, sizeof(pInfo));
Jeff Layton6b37faa2008-10-06 21:54:41 +00001164 cifsInode = CIFS_I(newinode);
1165 dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
1166 pInfo.Attributes = cpu_to_le32(dosattrs);
1167 tmprc = CIFSSMBSetPathInfo(xid, pTcon,
1168 full_path, &pInfo,
1169 cifs_sb->local_nls,
Jeff Layton67750fb2008-05-09 22:28:02 +00001170 cifs_sb->mnt_cifs_flags &
1171 CIFS_MOUNT_MAP_SPECIAL_CHR);
Jeff Layton6b37faa2008-10-06 21:54:41 +00001172 if (tmprc == 0)
1173 cifsInode->cifsAttrs = dosattrs;
Jeff Layton67750fb2008-05-09 22:28:02 +00001174 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001175 if (direntry->d_inode) {
Jeff Laytonb0fd30d2008-05-22 09:33:34 -04001176 if (cifs_sb->mnt_cifs_flags &
1177 CIFS_MOUNT_DYNPERM)
1178 direntry->d_inode->i_mode =
1179 (mode | S_IFDIR);
Steve French4e94a102008-05-23 18:22:46 +00001180
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001181 if (cifs_sb->mnt_cifs_flags &
Steve French6473a552005-11-29 20:20:10 -08001182 CIFS_MOUNT_SET_UID) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001183 direntry->d_inode->i_uid =
David Howellsa001e5b2008-11-14 10:38:47 +11001184 current_fsuid();
Jeff Layton95089912008-08-06 04:39:02 +00001185 if (inode->i_mode & S_ISGID)
1186 direntry->d_inode->i_gid =
1187 inode->i_gid;
1188 else
1189 direntry->d_inode->i_gid =
David Howellsa001e5b2008-11-14 10:38:47 +11001190 current_fsgid();
Steve French6473a552005-11-29 20:20:10 -08001191 }
1192 }
Steve French2a138ebb2005-11-29 21:22:19 -08001193 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001195mkdir_out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 kfree(full_path);
1197 FreeXid(xid);
1198 return rc;
1199}
1200
1201int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1202{
1203 int rc = 0;
1204 int xid;
1205 struct cifs_sb_info *cifs_sb;
1206 struct cifsTconInfo *pTcon;
1207 char *full_path = NULL;
1208 struct cifsInodeInfo *cifsInode;
1209
Steve French26a21b92006-05-31 18:05:34 +00001210 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211
1212 xid = GetXid();
1213
1214 cifs_sb = CIFS_SB(inode->i_sb);
1215 pTcon = cifs_sb->tcon;
1216
Steve French7f573562005-08-30 11:32:14 -07001217 full_path = build_path_from_dentry(direntry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 if (full_path == NULL) {
Suresh Jayaraman0f3bc092009-06-25 18:12:34 +05301219 rc = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 FreeXid(xid);
Suresh Jayaraman0f3bc092009-06-25 18:12:34 +05301221 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 }
1223
Steve French737b7582005-04-28 22:41:06 -07001224 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1225 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226
1227 if (!rc) {
Dave Hansen9a53c3a2006-09-30 23:29:03 -07001228 drop_nlink(inode);
Steve French3677db12007-02-26 16:46:11 +00001229 spin_lock(&direntry->d_inode->i_lock);
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001230 i_size_write(direntry->d_inode, 0);
Dave Hansence71ec32006-09-30 23:29:06 -07001231 clear_nlink(direntry->d_inode);
Steve French3677db12007-02-26 16:46:11 +00001232 spin_unlock(&direntry->d_inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 }
1234
1235 cifsInode = CIFS_I(direntry->d_inode);
1236 cifsInode->time = 0; /* force revalidate to go get info when
1237 needed */
Steve French42c24542009-01-13 22:03:55 +00001238
1239 cifsInode = CIFS_I(inode);
1240 cifsInode->time = 0; /* force revalidate to get parent dir info
1241 since cached search results now invalid */
1242
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1244 current_fs_time(inode->i_sb);
1245
1246 kfree(full_path);
1247 FreeXid(xid);
1248 return rc;
1249}
1250
Steve Frenchee2fd962008-09-23 18:23:33 +00001251static int
1252cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath,
1253 struct dentry *to_dentry, const char *toPath)
1254{
1255 struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb);
1256 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1257 __u16 srcfid;
1258 int oplock, rc;
1259
1260 /* try path-based rename first */
1261 rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls,
1262 cifs_sb->mnt_cifs_flags &
1263 CIFS_MOUNT_MAP_SPECIAL_CHR);
1264
1265 /*
1266 * don't bother with rename by filehandle unless file is busy and
1267 * source Note that cross directory moves do not work with
1268 * rename by filehandle to various Windows servers.
1269 */
1270 if (rc == 0 || rc != -ETXTBSY)
1271 return rc;
1272
1273 /* open the file to be renamed -- we need DELETE perms */
1274 rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE,
1275 CREATE_NOT_DIR, &srcfid, &oplock, NULL,
1276 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1277 CIFS_MOUNT_MAP_SPECIAL_CHR);
1278
1279 if (rc == 0) {
1280 rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid,
1281 (const char *) to_dentry->d_name.name,
1282 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
1283 CIFS_MOUNT_MAP_SPECIAL_CHR);
1284
1285 CIFSSMBClose(xid, pTcon, srcfid);
1286 }
1287
1288 return rc;
1289}
1290
Jeff Layton14121bd2008-10-20 14:45:22 -04001291int cifs_rename(struct inode *source_dir, struct dentry *source_dentry,
1292 struct inode *target_dir, struct dentry *target_dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293{
Steve Frenchee2fd962008-09-23 18:23:33 +00001294 char *fromName = NULL;
1295 char *toName = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 struct cifs_sb_info *cifs_sb_source;
1297 struct cifs_sb_info *cifs_sb_target;
Jeff Layton14121bd2008-10-20 14:45:22 -04001298 struct cifsTconInfo *tcon;
Steve Frenchee2fd962008-09-23 18:23:33 +00001299 FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
1300 FILE_UNIX_BASIC_INFO *info_buf_target;
Jeff Layton8d281ef2008-10-22 13:57:01 -04001301 int xid, rc, tmprc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302
Jeff Layton14121bd2008-10-20 14:45:22 -04001303 cifs_sb_target = CIFS_SB(target_dir->i_sb);
1304 cifs_sb_source = CIFS_SB(source_dir->i_sb);
1305 tcon = cifs_sb_source->tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306
Steve Frenchee2fd962008-09-23 18:23:33 +00001307 xid = GetXid();
1308
1309 /*
1310 * BB: this might be allowed if same server, but different share.
1311 * Consider adding support for this
1312 */
Jeff Layton14121bd2008-10-20 14:45:22 -04001313 if (tcon != cifs_sb_target->tcon) {
Steve Frenchee2fd962008-09-23 18:23:33 +00001314 rc = -EXDEV;
1315 goto cifs_rename_exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 }
1317
Steve Frenchee2fd962008-09-23 18:23:33 +00001318 /*
1319 * we already have the rename sem so we do not need to
1320 * grab it again here to protect the path integrity
1321 */
Jeff Layton14121bd2008-10-20 14:45:22 -04001322 fromName = build_path_from_dentry(source_dentry);
Steve Frenchee2fd962008-09-23 18:23:33 +00001323 if (fromName == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324 rc = -ENOMEM;
1325 goto cifs_rename_exit;
1326 }
1327
Jeff Layton14121bd2008-10-20 14:45:22 -04001328 toName = build_path_from_dentry(target_dentry);
Steve Frenchee2fd962008-09-23 18:23:33 +00001329 if (toName == NULL) {
1330 rc = -ENOMEM;
1331 goto cifs_rename_exit;
1332 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333
Jeff Layton14121bd2008-10-20 14:45:22 -04001334 rc = cifs_do_rename(xid, source_dentry, fromName,
1335 target_dentry, toName);
Steve Frenchee2fd962008-09-23 18:23:33 +00001336
Jeff Layton14121bd2008-10-20 14:45:22 -04001337 if (rc == -EEXIST && tcon->unix_ext) {
Steve Frenchee2fd962008-09-23 18:23:33 +00001338 /*
Jeff Layton14121bd2008-10-20 14:45:22 -04001339 * Are src and dst hardlinks of same inode? We can
1340 * only tell with unix extensions enabled
Steve Frenchee2fd962008-09-23 18:23:33 +00001341 */
Jeff Layton14121bd2008-10-20 14:45:22 -04001342 info_buf_source =
1343 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO),
1344 GFP_KERNEL);
1345 if (info_buf_source == NULL) {
1346 rc = -ENOMEM;
1347 goto cifs_rename_exit;
1348 }
1349
1350 info_buf_target = info_buf_source + 1;
Jeff Layton8d281ef2008-10-22 13:57:01 -04001351 tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName,
Jeff Layton14121bd2008-10-20 14:45:22 -04001352 info_buf_source,
1353 cifs_sb_source->local_nls,
1354 cifs_sb_source->mnt_cifs_flags &
1355 CIFS_MOUNT_MAP_SPECIAL_CHR);
Jeff Layton8d281ef2008-10-22 13:57:01 -04001356 if (tmprc != 0)
Jeff Layton14121bd2008-10-20 14:45:22 -04001357 goto unlink_target;
1358
Jeff Layton8d281ef2008-10-22 13:57:01 -04001359 tmprc = CIFSSMBUnixQPathInfo(xid, tcon,
Jeff Layton14121bd2008-10-20 14:45:22 -04001360 toName, info_buf_target,
1361 cifs_sb_target->local_nls,
1362 /* remap based on source sb */
1363 cifs_sb_source->mnt_cifs_flags &
1364 CIFS_MOUNT_MAP_SPECIAL_CHR);
1365
Jeff Layton8d281ef2008-10-22 13:57:01 -04001366 if (tmprc == 0 && (info_buf_source->UniqueId ==
Jeff Laytonae6884a2008-11-03 14:05:08 -05001367 info_buf_target->UniqueId)) {
Jeff Layton14121bd2008-10-20 14:45:22 -04001368 /* same file, POSIX says that this is a noop */
Jeff Laytonae6884a2008-11-03 14:05:08 -05001369 rc = 0;
Jeff Layton14121bd2008-10-20 14:45:22 -04001370 goto cifs_rename_exit;
Jeff Laytonae6884a2008-11-03 14:05:08 -05001371 }
Jeff Layton14121bd2008-10-20 14:45:22 -04001372 } /* else ... BB we could add the same check for Windows by
1373 checking the UniqueId via FILE_INTERNAL_INFO */
1374
Jeff Layton14121bd2008-10-20 14:45:22 -04001375unlink_target:
Jeff Laytonfc6f3942009-04-17 11:45:30 -04001376 /* Try unlinking the target dentry if it's not negative */
1377 if (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) {
Jeff Layton8d281ef2008-10-22 13:57:01 -04001378 tmprc = cifs_unlink(target_dir, target_dentry);
Jeff Layton14121bd2008-10-20 14:45:22 -04001379 if (tmprc)
1380 goto cifs_rename_exit;
1381
Jeff Layton14121bd2008-10-20 14:45:22 -04001382 rc = cifs_do_rename(xid, source_dentry, fromName,
1383 target_dentry, toName);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384 }
1385
1386cifs_rename_exit:
Steve Frenchee2fd962008-09-23 18:23:33 +00001387 kfree(info_buf_source);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388 kfree(fromName);
1389 kfree(toName);
1390 FreeXid(xid);
1391 return rc;
1392}
1393
1394int cifs_revalidate(struct dentry *direntry)
1395{
1396 int xid;
Jeff Laytoncea21802007-11-20 23:19:03 +00001397 int rc = 0, wbrc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398 char *full_path;
1399 struct cifs_sb_info *cifs_sb;
1400 struct cifsInodeInfo *cifsInode;
1401 loff_t local_size;
1402 struct timespec local_mtime;
Steve French4b18f2a2008-04-29 00:06:05 +00001403 bool invalidate_inode = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404
1405 if (direntry->d_inode == NULL)
1406 return -ENOENT;
1407
1408 cifsInode = CIFS_I(direntry->d_inode);
1409
1410 if (cifsInode == NULL)
1411 return -ENOENT;
1412
1413 /* no sense revalidating inode info on file that no one can write */
1414 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1415 return rc;
1416
1417 xid = GetXid();
1418
1419 cifs_sb = CIFS_SB(direntry->d_sb);
1420
1421 /* can not safely grab the rename sem here if rename calls revalidate
1422 since that would deadlock */
Steve French7f573562005-08-30 11:32:14 -07001423 full_path = build_path_from_dentry(direntry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 if (full_path == NULL) {
Suresh Jayaraman0f3bc092009-06-25 18:12:34 +05301425 rc = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426 FreeXid(xid);
Suresh Jayaraman0f3bc092009-06-25 18:12:34 +05301427 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428 }
1429 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1430 "jiffies %ld", full_path, direntry->d_inode,
1431 direntry->d_inode->i_count.counter, direntry,
1432 direntry->d_time, jiffies));
1433
1434 if (cifsInode->time == 0) {
1435 /* was set to zero previously to force revalidate */
1436 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1437 lookupCacheEnabled) {
1438 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1439 (direntry->d_inode->i_nlink == 1)) {
1440 kfree(full_path);
1441 FreeXid(xid);
1442 return rc;
1443 } else {
1444 cFYI(1, ("Have to revalidate file due to hardlinks"));
1445 }
1446 }
1447
1448 /* save mtime and size */
1449 local_mtime = direntry->d_inode->i_mtime;
1450 local_size = direntry->d_inode->i_size;
1451
Steve Frenchc18c8422007-07-18 23:21:09 +00001452 if (cifs_sb->tcon->unix_ext) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001454 direntry->d_sb, xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455 if (rc) {
1456 cFYI(1, ("error on getting revalidate info %d", rc));
1457/* if (rc != -ENOENT)
1458 rc = 0; */ /* BB should we cache info on
1459 certain errors? */
1460 }
1461 } else {
1462 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
Steve French8b1327f2008-03-14 22:37:16 +00001463 direntry->d_sb, xid, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464 if (rc) {
1465 cFYI(1, ("error on getting revalidate info %d", rc));
1466/* if (rc != -ENOENT)
1467 rc = 0; */ /* BB should we cache info on
1468 certain errors? */
1469 }
1470 }
1471 /* should we remap certain errors, access denied?, to zero */
1472
1473 /* if not oplocked, we invalidate inode pages if mtime or file size
1474 had changed on server */
1475
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001476 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477 (local_size == direntry->d_inode->i_size)) {
1478 cFYI(1, ("cifs_revalidate - inode unchanged"));
1479 } else {
1480 /* file may have changed on server */
1481 if (cifsInode->clientCanCacheRead) {
1482 /* no need to invalidate inode pages since we were the
1483 only ones who could have modified the file and the
1484 server copy is staler than ours */
1485 } else {
Steve French4b18f2a2008-04-29 00:06:05 +00001486 invalidate_inode = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487 }
1488 }
1489
1490 /* can not grab this sem since kernel filesys locking documentation
Jes Sorensen1b1dcc12006-01-09 15:59:24 -08001491 indicates i_mutex may be taken by the kernel on lookup and rename
1492 which could deadlock if we grab the i_mutex here as well */
1493/* mutex_lock(&direntry->d_inode->i_mutex);*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494 /* need to write out dirty pages here */
1495 if (direntry->d_inode->i_mapping) {
1496 /* do we need to lock inode until after invalidate completes
1497 below? */
Jeff Laytoncea21802007-11-20 23:19:03 +00001498 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1499 if (wbrc)
1500 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001501 }
1502 if (invalidate_inode) {
Steve French3abb9272005-11-28 08:16:13 -08001503 /* shrink_dcache not necessary now that cifs dentry ops
1504 are exported for negative dentries */
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001505/* if (S_ISDIR(direntry->d_inode->i_mode))
Steve French3abb9272005-11-28 08:16:13 -08001506 shrink_dcache_parent(direntry); */
1507 if (S_ISREG(direntry->d_inode->i_mode)) {
Suresh Jayaraman9e96af82008-08-05 14:38:40 +05301508 if (direntry->d_inode->i_mapping) {
Jeff Laytoncea21802007-11-20 23:19:03 +00001509 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1510 if (wbrc)
1511 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
Suresh Jayaraman9e96af82008-08-05 14:38:40 +05301512 }
Steve French3abb9272005-11-28 08:16:13 -08001513 /* may eventually have to do this for open files too */
1514 if (list_empty(&(cifsInode->openFileList))) {
1515 /* changed on server - flush read ahead pages */
1516 cFYI(1, ("Invalidating read ahead data on "
1517 "closed file"));
1518 invalidate_remote_inode(direntry->d_inode);
1519 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520 }
1521 }
Jes Sorensen1b1dcc12006-01-09 15:59:24 -08001522/* mutex_unlock(&direntry->d_inode->i_mutex); */
Steve French50c2f752007-07-13 00:33:32 +00001523
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524 kfree(full_path);
1525 FreeXid(xid);
1526 return rc;
1527}
1528
1529int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1530 struct kstat *stat)
1531{
1532 int err = cifs_revalidate(dentry);
Steve French5fe14c82006-11-07 19:26:33 +00001533 if (!err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534 generic_fillattr(dentry->d_inode, stat);
Steve French5fe14c82006-11-07 19:26:33 +00001535 stat->blksize = CIFS_MAX_MSGSIZE;
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001536 stat->ino = CIFS_I(dentry->d_inode)->uniqueid;
Steve French5fe14c82006-11-07 19:26:33 +00001537 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 return err;
1539}
1540
1541static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1542{
1543 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1544 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1545 struct page *page;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546 int rc = 0;
1547
1548 page = grab_cache_page(mapping, index);
1549 if (!page)
1550 return -ENOMEM;
1551
Christoph Lametereebd2aa2008-02-04 22:28:29 -08001552 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553 unlock_page(page);
1554 page_cache_release(page);
1555 return rc;
1556}
1557
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001558static int cifs_vmtruncate(struct inode *inode, loff_t offset)
Steve French3677db12007-02-26 16:46:11 +00001559{
1560 struct address_space *mapping = inode->i_mapping;
1561 unsigned long limit;
1562
Steve Frenchba6a46a2007-02-26 20:06:29 +00001563 spin_lock(&inode->i_lock);
Steve French3677db12007-02-26 16:46:11 +00001564 if (inode->i_size < offset)
1565 goto do_expand;
1566 /*
1567 * truncation of in-use swapfiles is disallowed - it would cause
1568 * subsequent swapout to scribble on the now-freed blocks.
1569 */
Steve Frenchba6a46a2007-02-26 20:06:29 +00001570 if (IS_SWAPFILE(inode)) {
1571 spin_unlock(&inode->i_lock);
Steve French3677db12007-02-26 16:46:11 +00001572 goto out_busy;
Steve Frenchba6a46a2007-02-26 20:06:29 +00001573 }
Steve French3677db12007-02-26 16:46:11 +00001574 i_size_write(inode, offset);
1575 spin_unlock(&inode->i_lock);
Steve French8064ab42007-08-22 22:12:07 +00001576 /*
1577 * unmap_mapping_range is called twice, first simply for efficiency
1578 * so that truncate_inode_pages does fewer single-page unmaps. However
1579 * after this first call, and before truncate_inode_pages finishes,
1580 * it is possible for private pages to be COWed, which remain after
1581 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1582 * call must be made for correctness.
1583 */
Steve French3677db12007-02-26 16:46:11 +00001584 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1585 truncate_inode_pages(mapping, offset);
Steve French8064ab42007-08-22 22:12:07 +00001586 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
Steve French3677db12007-02-26 16:46:11 +00001587 goto out_truncate;
1588
1589do_expand:
1590 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
Steve Frenchba6a46a2007-02-26 20:06:29 +00001591 if (limit != RLIM_INFINITY && offset > limit) {
1592 spin_unlock(&inode->i_lock);
Steve French3677db12007-02-26 16:46:11 +00001593 goto out_sig;
Steve Frenchba6a46a2007-02-26 20:06:29 +00001594 }
1595 if (offset > inode->i_sb->s_maxbytes) {
1596 spin_unlock(&inode->i_lock);
Steve French3677db12007-02-26 16:46:11 +00001597 goto out_big;
Steve Frenchba6a46a2007-02-26 20:06:29 +00001598 }
Steve French3677db12007-02-26 16:46:11 +00001599 i_size_write(inode, offset);
Steve Frenchba6a46a2007-02-26 20:06:29 +00001600 spin_unlock(&inode->i_lock);
Steve French3677db12007-02-26 16:46:11 +00001601out_truncate:
Al Viroacfa4382008-12-04 10:06:33 -05001602 if (inode->i_op->truncate)
Steve French3677db12007-02-26 16:46:11 +00001603 inode->i_op->truncate(inode);
1604 return 0;
1605out_sig:
1606 send_sig(SIGXFSZ, current, 0);
1607out_big:
1608 return -EFBIG;
1609out_busy:
1610 return -ETXTBSY;
1611}
1612
Jeff Layton8efdbde2008-07-23 21:28:12 +00001613static int
1614cifs_set_file_size(struct inode *inode, struct iattr *attrs,
1615 int xid, char *full_path)
1616{
1617 int rc;
1618 struct cifsFileInfo *open_file;
1619 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1620 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1621 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1622
1623 /*
1624 * To avoid spurious oplock breaks from server, in the case of
1625 * inodes that we already have open, avoid doing path based
1626 * setting of file size if we can do it by handle.
1627 * This keeps our caching token (oplock) and avoids timeouts
1628 * when the local oplock break takes longer to flush
1629 * writebehind data than the SMB timeout for the SetPathInfo
1630 * request would allow
1631 */
1632 open_file = find_writable_file(cifsInode);
1633 if (open_file) {
1634 __u16 nfid = open_file->netfid;
1635 __u32 npid = open_file->pid;
1636 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
1637 npid, false);
1638 atomic_dec(&open_file->wrtPending);
1639 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1640 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1641 unsigned int bytes_written;
1642 rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
1643 &bytes_written, NULL, NULL, 1);
1644 cFYI(1, ("Wrt seteof rc %d", rc));
1645 }
1646 } else
1647 rc = -EINVAL;
1648
1649 if (rc != 0) {
1650 /* Set file size by pathname rather than by handle
1651 either because no valid, writeable file handle for
1652 it was found or because there was an error setting
1653 it by handle */
1654 rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
1655 false, cifs_sb->local_nls,
1656 cifs_sb->mnt_cifs_flags &
1657 CIFS_MOUNT_MAP_SPECIAL_CHR);
1658 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1659 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1660 __u16 netfid;
1661 int oplock = 0;
1662
1663 rc = SMBLegacyOpen(xid, pTcon, full_path,
1664 FILE_OPEN, GENERIC_WRITE,
1665 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1666 cifs_sb->local_nls,
1667 cifs_sb->mnt_cifs_flags &
1668 CIFS_MOUNT_MAP_SPECIAL_CHR);
1669 if (rc == 0) {
1670 unsigned int bytes_written;
1671 rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
1672 attrs->ia_size,
1673 &bytes_written, NULL,
1674 NULL, 1);
1675 cFYI(1, ("wrt seteof rc %d", rc));
1676 CIFSSMBClose(xid, pTcon, netfid);
1677 }
1678 }
1679 }
1680
1681 if (rc == 0) {
Jeff Laytonfbec9ab2009-04-03 13:44:00 -04001682 cifsInode->server_eof = attrs->ia_size;
Jeff Layton8efdbde2008-07-23 21:28:12 +00001683 rc = cifs_vmtruncate(inode, attrs->ia_size);
1684 cifs_truncate_page(inode->i_mapping, inode->i_size);
1685 }
1686
1687 return rc;
1688}
1689
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001690static int
1691cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
1692{
1693 int rc;
1694 int xid;
1695 char *full_path = NULL;
1696 struct inode *inode = direntry->d_inode;
1697 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1698 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1699 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1700 struct cifs_unix_set_info_args *args = NULL;
Jeff Layton3bbeeb32009-07-09 20:02:50 -04001701 struct cifsFileInfo *open_file;
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001702
1703 cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x",
1704 direntry->d_name.name, attrs->ia_valid));
1705
1706 xid = GetXid();
1707
1708 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1709 /* check if we have permission to change attrs */
1710 rc = inode_change_ok(inode, attrs);
1711 if (rc < 0)
1712 goto out;
1713 else
1714 rc = 0;
1715 }
1716
1717 full_path = build_path_from_dentry(direntry);
1718 if (full_path == NULL) {
1719 rc = -ENOMEM;
1720 goto out;
1721 }
1722
Jeff Layton0f4d6342009-03-26 13:35:37 -04001723 /*
1724 * Attempt to flush data before changing attributes. We need to do
1725 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
1726 * ownership or mode then we may also need to do this. Here, we take
1727 * the safe way out and just do the flush on all setattr requests. If
1728 * the flush returns error, store it to report later and continue.
1729 *
1730 * BB: This should be smarter. Why bother flushing pages that
1731 * will be truncated anyway? Also, should we error out here if
1732 * the flush returns error?
1733 */
1734 rc = filemap_write_and_wait(inode->i_mapping);
1735 if (rc != 0) {
1736 cifsInode->write_behind_rc = rc;
1737 rc = 0;
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001738 }
1739
1740 if (attrs->ia_valid & ATTR_SIZE) {
1741 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1742 if (rc != 0)
1743 goto out;
1744 }
1745
1746 /* skip mode change if it's just for clearing setuid/setgid */
1747 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1748 attrs->ia_valid &= ~ATTR_MODE;
1749
1750 args = kmalloc(sizeof(*args), GFP_KERNEL);
1751 if (args == NULL) {
1752 rc = -ENOMEM;
1753 goto out;
1754 }
1755
1756 /* set up the struct */
1757 if (attrs->ia_valid & ATTR_MODE)
1758 args->mode = attrs->ia_mode;
1759 else
1760 args->mode = NO_CHANGE_64;
1761
1762 if (attrs->ia_valid & ATTR_UID)
1763 args->uid = attrs->ia_uid;
1764 else
1765 args->uid = NO_CHANGE_64;
1766
1767 if (attrs->ia_valid & ATTR_GID)
1768 args->gid = attrs->ia_gid;
1769 else
1770 args->gid = NO_CHANGE_64;
1771
1772 if (attrs->ia_valid & ATTR_ATIME)
1773 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
1774 else
1775 args->atime = NO_CHANGE_64;
1776
1777 if (attrs->ia_valid & ATTR_MTIME)
1778 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
1779 else
1780 args->mtime = NO_CHANGE_64;
1781
1782 if (attrs->ia_valid & ATTR_CTIME)
1783 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
1784 else
1785 args->ctime = NO_CHANGE_64;
1786
1787 args->device = 0;
Jeff Layton3bbeeb32009-07-09 20:02:50 -04001788 open_file = find_writable_file(cifsInode);
1789 if (open_file) {
1790 u16 nfid = open_file->netfid;
1791 u32 npid = open_file->pid;
1792 rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
1793 atomic_dec(&open_file->wrtPending);
1794 } else {
1795 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
Jeff Layton01ea95e2009-07-09 20:02:49 -04001796 cifs_sb->local_nls,
1797 cifs_sb->mnt_cifs_flags &
1798 CIFS_MOUNT_MAP_SPECIAL_CHR);
Jeff Layton3bbeeb32009-07-09 20:02:50 -04001799 }
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001800
1801 if (!rc)
1802 rc = inode_setattr(inode, attrs);
1803out:
1804 kfree(args);
1805 kfree(full_path);
1806 FreeXid(xid);
1807 return rc;
1808}
1809
Jeff Layton0510eeb2008-08-02 07:26:12 -04001810static int
1811cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812{
1813 int xid;
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001814 struct inode *inode = direntry->d_inode;
1815 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001816 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001817 char *full_path = NULL;
1818 int rc = -EACCES;
Jeff Laytonfeb3e202008-08-02 07:26:12 -04001819 __u32 dosattr = 0;
Jeff Layton4e1e7fb2008-08-02 07:26:12 -04001820 __u64 mode = NO_CHANGE_64;
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001821
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822 xid = GetXid();
1823
Steve French39798772006-05-31 22:40:51 +00001824 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001825 direntry->d_name.name, attrs->ia_valid));
Steve French6473a552005-11-29 20:20:10 -08001826
Steve French2a138ebb2005-11-29 21:22:19 -08001827 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
Steve French6473a552005-11-29 20:20:10 -08001828 /* check if we have permission to change attrs */
Jeff Layton02eadef2008-05-09 21:26:11 +00001829 rc = inode_change_ok(inode, attrs);
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001830 if (rc < 0) {
Steve French6473a552005-11-29 20:20:10 -08001831 FreeXid(xid);
1832 return rc;
1833 } else
1834 rc = 0;
1835 }
Steve French50c2f752007-07-13 00:33:32 +00001836
Steve French7f573562005-08-30 11:32:14 -07001837 full_path = build_path_from_dentry(direntry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838 if (full_path == NULL) {
Suresh Jayaraman0f3bc092009-06-25 18:12:34 +05301839 rc = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840 FreeXid(xid);
Suresh Jayaraman0f3bc092009-06-25 18:12:34 +05301841 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843
Jeff Layton0f4d6342009-03-26 13:35:37 -04001844 /*
1845 * Attempt to flush data before changing attributes. We need to do
1846 * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
1847 * ownership or mode then we may also need to do this. Here, we take
1848 * the safe way out and just do the flush on all setattr requests. If
1849 * the flush returns error, store it to report later and continue.
1850 *
1851 * BB: This should be smarter. Why bother flushing pages that
1852 * will be truncated anyway? Also, should we error out here if
1853 * the flush returns error?
1854 */
1855 rc = filemap_write_and_wait(inode->i_mapping);
1856 if (rc != 0) {
1857 cifsInode->write_behind_rc = rc;
1858 rc = 0;
Steve French50531442008-03-14 19:21:31 +00001859 }
Jeff Laytoncea21802007-11-20 23:19:03 +00001860
Steve French50531442008-03-14 19:21:31 +00001861 if (attrs->ia_valid & ATTR_SIZE) {
Jeff Layton8efdbde2008-07-23 21:28:12 +00001862 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1863 if (rc != 0)
Steve Frenche30dcf32005-09-20 20:49:16 -07001864 goto cifs_setattr_exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865 }
Jeff Layton4ca691a2008-05-22 09:33:34 -04001866
1867 /*
1868 * Without unix extensions we can't send ownership changes to the
1869 * server, so silently ignore them. This is consistent with how
1870 * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With
1871 * CIFSACL support + proper Windows to Unix idmapping, we may be
1872 * able to support this in the future.
1873 */
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001874 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
Jeff Layton4ca691a2008-05-22 09:33:34 -04001875 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876
Jeff Laytond32c4f22007-10-18 03:05:22 -07001877 /* skip mode change if it's just for clearing setuid/setgid */
1878 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1879 attrs->ia_valid &= ~ATTR_MODE;
1880
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881 if (attrs->ia_valid & ATTR_MODE) {
Jeff Layton51328612008-05-22 09:33:34 -04001882 cFYI(1, ("Mode changed to 0%o", attrs->ia_mode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883 mode = attrs->ia_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884 }
1885
Jeff Layton3fe5c1d2008-08-02 07:26:12 -04001886 if (attrs->ia_valid & ATTR_MODE) {
Steve Frenchcdbce9c2005-11-19 21:04:52 -08001887 rc = 0;
Steve French97837582007-12-31 07:47:21 +00001888#ifdef CONFIG_CIFS_EXPERIMENTAL
1889 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
Jeff Layton02eadef2008-05-09 21:26:11 +00001890 rc = mode_to_acl(inode, full_path, mode);
Jeff Layton51328612008-05-22 09:33:34 -04001891 else
Steve French97837582007-12-31 07:47:21 +00001892#endif
Jeff Layton51328612008-05-22 09:33:34 -04001893 if (((mode & S_IWUGO) == 0) &&
1894 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
Jeff Laytonfeb3e202008-08-02 07:26:12 -04001895
1896 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
1897
Jeff Layton51328612008-05-22 09:33:34 -04001898 /* fix up mode if we're not using dynperm */
1899 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
1900 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
1901 } else if ((mode & S_IWUGO) &&
1902 (cifsInode->cifsAttrs & ATTR_READONLY)) {
Jeff Laytonfeb3e202008-08-02 07:26:12 -04001903
1904 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
1905 /* Attributes of 0 are ignored */
1906 if (dosattr == 0)
1907 dosattr |= ATTR_NORMAL;
Jeff Layton51328612008-05-22 09:33:34 -04001908
1909 /* reset local inode permissions to normal */
1910 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1911 attrs->ia_mode &= ~(S_IALLUGO);
1912 if (S_ISDIR(inode->i_mode))
1913 attrs->ia_mode |=
1914 cifs_sb->mnt_dir_mode;
1915 else
1916 attrs->ia_mode |=
1917 cifs_sb->mnt_file_mode;
1918 }
1919 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1920 /* ignore mode change - ATTR_READONLY hasn't changed */
1921 attrs->ia_valid &= ~ATTR_MODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 }
1924
Jeff Laytonfeb3e202008-08-02 07:26:12 -04001925 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
1926 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
1927 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1928 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929
Steve Frenche30dcf32005-09-20 20:49:16 -07001930 /* Even if error on time set, no sense failing the call if
1931 the server would set the time to a reasonable value anyway,
1932 and this check ensures that we are not being called from
1933 sys_utimes in which case we ought to fail the call back to
1934 the user when the server rejects the call */
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001935 if ((rc) && (attrs->ia_valid &
Jeff Laytonfeb3e202008-08-02 07:26:12 -04001936 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
Steve Frenche30dcf32005-09-20 20:49:16 -07001937 rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938 }
1939
1940 /* do not need local check to inode_check_ok since the server does
1941 that */
1942 if (!rc)
Jeff Layton02eadef2008-05-09 21:26:11 +00001943 rc = inode_setattr(inode, attrs);
Steve Frenche30dcf32005-09-20 20:49:16 -07001944cifs_setattr_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001945 kfree(full_path);
1946 FreeXid(xid);
1947 return rc;
1948}
1949
Jeff Layton0510eeb2008-08-02 07:26:12 -04001950int
1951cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1952{
1953 struct inode *inode = direntry->d_inode;
1954 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1955 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1956
1957 if (pTcon->unix_ext)
1958 return cifs_setattr_unix(direntry, attrs);
1959
1960 return cifs_setattr_nounix(direntry, attrs);
1961
1962 /* BB: add cifs_setattr_legacy for really old servers */
1963}
1964
Steve French99ee4db2007-02-27 05:35:17 +00001965#if 0
Linus Torvalds1da177e2005-04-16 15:20:36 -07001966void cifs_delete_inode(struct inode *inode)
1967{
Steve French26a21b92006-05-31 18:05:34 +00001968 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 /* may have to add back in if and when safe distributed caching of
1970 directories added e.g. via FindNotify */
1971}
Steve French99ee4db2007-02-27 05:35:17 +00001972#endif