Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/link.c |
| 3 | * |
Steve French | 366781c | 2008-01-25 10:12:41 +0000 | [diff] [blame] | 4 | * Copyright (C) International Business Machines Corp., 2002,2008 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * 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> |
| 22 | #include <linux/stat.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 23 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/namei.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" |
Stefan Metzmacher | c69c1b6 | 2010-07-31 09:14:16 +0200 | [diff] [blame] | 31 | |
| 32 | #define CIFS_MF_SYMLINK_LEN_OFFSET (4+1) |
| 33 | #define CIFS_MF_SYMLINK_MD5_OFFSET (CIFS_MF_SYMLINK_LEN_OFFSET+(4+1)) |
| 34 | #define CIFS_MF_SYMLINK_LINK_OFFSET (CIFS_MF_SYMLINK_MD5_OFFSET+(32+1)) |
| 35 | #define CIFS_MF_SYMLINK_LINK_MAXLEN (1024) |
| 36 | #define CIFS_MF_SYMLINK_FILE_SIZE \ |
| 37 | (CIFS_MF_SYMLINK_LINK_OFFSET + CIFS_MF_SYMLINK_LINK_MAXLEN) |
| 38 | |
| 39 | #define CIFS_MF_SYMLINK_LEN_FORMAT "XSym\n%04u\n" |
| 40 | #define CIFS_MF_SYMLINK_MD5_FORMAT \ |
| 41 | "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n" |
| 42 | #define CIFS_MF_SYMLINK_MD5_ARGS(md5_hash) \ |
| 43 | md5_hash[0], md5_hash[1], md5_hash[2], md5_hash[3], \ |
| 44 | md5_hash[4], md5_hash[5], md5_hash[6], md5_hash[7], \ |
| 45 | md5_hash[8], md5_hash[9], md5_hash[10], md5_hash[11],\ |
| 46 | md5_hash[12], md5_hash[13], md5_hash[14], md5_hash[15] |
| 47 | |
| 48 | static int |
Steve French | 93c100c | 2011-01-25 19:28:43 +0000 | [diff] [blame] | 49 | symlink_hash(unsigned int link_len, const char *link_str, u8 *md5_hash) |
| 50 | { |
| 51 | int rc; |
| 52 | unsigned int size; |
| 53 | struct crypto_shash *md5; |
| 54 | struct sdesc *sdescmd5; |
| 55 | |
| 56 | md5 = crypto_alloc_shash("md5", 0, 0); |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 57 | if (IS_ERR(md5)) { |
Jeff Layton | ffeb414 | 2011-01-29 07:03:02 -0500 | [diff] [blame] | 58 | rc = PTR_ERR(md5); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 59 | cifs_dbg(VFS, "%s: Crypto md5 allocation error %d\n", |
| 60 | __func__, rc); |
Jeff Layton | ffeb414 | 2011-01-29 07:03:02 -0500 | [diff] [blame] | 61 | return rc; |
Steve French | 93c100c | 2011-01-25 19:28:43 +0000 | [diff] [blame] | 62 | } |
| 63 | size = sizeof(struct shash_desc) + crypto_shash_descsize(md5); |
| 64 | sdescmd5 = kmalloc(size, GFP_KERNEL); |
| 65 | if (!sdescmd5) { |
| 66 | rc = -ENOMEM; |
Steve French | 93c100c | 2011-01-25 19:28:43 +0000 | [diff] [blame] | 67 | goto symlink_hash_err; |
| 68 | } |
| 69 | sdescmd5->shash.tfm = md5; |
| 70 | sdescmd5->shash.flags = 0x0; |
| 71 | |
| 72 | rc = crypto_shash_init(&sdescmd5->shash); |
| 73 | if (rc) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 74 | cifs_dbg(VFS, "%s: Could not init md5 shash\n", __func__); |
Steve French | 93c100c | 2011-01-25 19:28:43 +0000 | [diff] [blame] | 75 | goto symlink_hash_err; |
| 76 | } |
Shirish Pargaonkar | 14cae32 | 2011-06-20 16:14:03 -0500 | [diff] [blame] | 77 | rc = crypto_shash_update(&sdescmd5->shash, link_str, link_len); |
| 78 | if (rc) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 79 | cifs_dbg(VFS, "%s: Could not update with link_str\n", __func__); |
Shirish Pargaonkar | 14cae32 | 2011-06-20 16:14:03 -0500 | [diff] [blame] | 80 | goto symlink_hash_err; |
| 81 | } |
Steve French | 93c100c | 2011-01-25 19:28:43 +0000 | [diff] [blame] | 82 | rc = crypto_shash_final(&sdescmd5->shash, md5_hash); |
Shirish Pargaonkar | 14cae32 | 2011-06-20 16:14:03 -0500 | [diff] [blame] | 83 | if (rc) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 84 | cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__); |
Steve French | 93c100c | 2011-01-25 19:28:43 +0000 | [diff] [blame] | 85 | |
| 86 | symlink_hash_err: |
| 87 | crypto_free_shash(md5); |
| 88 | kfree(sdescmd5); |
| 89 | |
| 90 | return rc; |
| 91 | } |
| 92 | |
| 93 | static int |
Stefan Metzmacher | c69c1b6 | 2010-07-31 09:14:16 +0200 | [diff] [blame] | 94 | CIFSParseMFSymlink(const u8 *buf, |
| 95 | unsigned int buf_len, |
| 96 | unsigned int *_link_len, |
| 97 | char **_link_str) |
| 98 | { |
| 99 | int rc; |
| 100 | unsigned int link_len; |
| 101 | const char *md5_str1; |
| 102 | const char *link_str; |
Stefan Metzmacher | c69c1b6 | 2010-07-31 09:14:16 +0200 | [diff] [blame] | 103 | u8 md5_hash[16]; |
| 104 | char md5_str2[34]; |
| 105 | |
| 106 | if (buf_len != CIFS_MF_SYMLINK_FILE_SIZE) |
| 107 | return -EINVAL; |
| 108 | |
| 109 | md5_str1 = (const char *)&buf[CIFS_MF_SYMLINK_MD5_OFFSET]; |
| 110 | link_str = (const char *)&buf[CIFS_MF_SYMLINK_LINK_OFFSET]; |
| 111 | |
| 112 | rc = sscanf(buf, CIFS_MF_SYMLINK_LEN_FORMAT, &link_len); |
| 113 | if (rc != 1) |
| 114 | return -EINVAL; |
| 115 | |
Steve French | 93c100c | 2011-01-25 19:28:43 +0000 | [diff] [blame] | 116 | rc = symlink_hash(link_len, link_str, md5_hash); |
| 117 | if (rc) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 118 | cifs_dbg(FYI, "%s: MD5 hash failure: %d\n", __func__, rc); |
Steve French | 93c100c | 2011-01-25 19:28:43 +0000 | [diff] [blame] | 119 | return rc; |
| 120 | } |
Stefan Metzmacher | c69c1b6 | 2010-07-31 09:14:16 +0200 | [diff] [blame] | 121 | |
| 122 | snprintf(md5_str2, sizeof(md5_str2), |
| 123 | CIFS_MF_SYMLINK_MD5_FORMAT, |
| 124 | CIFS_MF_SYMLINK_MD5_ARGS(md5_hash)); |
| 125 | |
| 126 | if (strncmp(md5_str1, md5_str2, 17) != 0) |
| 127 | return -EINVAL; |
| 128 | |
| 129 | if (_link_str) { |
| 130 | *_link_str = kstrndup(link_str, link_len, GFP_KERNEL); |
| 131 | if (!*_link_str) |
| 132 | return -ENOMEM; |
| 133 | } |
| 134 | |
| 135 | *_link_len = link_len; |
| 136 | return 0; |
| 137 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
Stefan Metzmacher | 0fd43ae | 2010-08-05 21:13:44 +0200 | [diff] [blame] | 139 | static int |
Stefan Metzmacher | 18bddd1 | 2010-08-03 11:24:22 +0200 | [diff] [blame] | 140 | CIFSFormatMFSymlink(u8 *buf, unsigned int buf_len, const char *link_str) |
| 141 | { |
Steve French | 93c100c | 2011-01-25 19:28:43 +0000 | [diff] [blame] | 142 | int rc; |
Stefan Metzmacher | 18bddd1 | 2010-08-03 11:24:22 +0200 | [diff] [blame] | 143 | unsigned int link_len; |
| 144 | unsigned int ofs; |
Stefan Metzmacher | 18bddd1 | 2010-08-03 11:24:22 +0200 | [diff] [blame] | 145 | u8 md5_hash[16]; |
| 146 | |
| 147 | if (buf_len != CIFS_MF_SYMLINK_FILE_SIZE) |
| 148 | return -EINVAL; |
| 149 | |
| 150 | link_len = strlen(link_str); |
| 151 | |
| 152 | if (link_len > CIFS_MF_SYMLINK_LINK_MAXLEN) |
| 153 | return -ENAMETOOLONG; |
| 154 | |
Steve French | 93c100c | 2011-01-25 19:28:43 +0000 | [diff] [blame] | 155 | rc = symlink_hash(link_len, link_str, md5_hash); |
| 156 | if (rc) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 157 | cifs_dbg(FYI, "%s: MD5 hash failure: %d\n", __func__, rc); |
Steve French | 93c100c | 2011-01-25 19:28:43 +0000 | [diff] [blame] | 158 | return rc; |
| 159 | } |
Stefan Metzmacher | 18bddd1 | 2010-08-03 11:24:22 +0200 | [diff] [blame] | 160 | |
| 161 | snprintf(buf, buf_len, |
| 162 | CIFS_MF_SYMLINK_LEN_FORMAT CIFS_MF_SYMLINK_MD5_FORMAT, |
| 163 | link_len, |
| 164 | CIFS_MF_SYMLINK_MD5_ARGS(md5_hash)); |
| 165 | |
| 166 | ofs = CIFS_MF_SYMLINK_LINK_OFFSET; |
| 167 | memcpy(buf + ofs, link_str, link_len); |
| 168 | |
| 169 | ofs += link_len; |
| 170 | if (ofs < CIFS_MF_SYMLINK_FILE_SIZE) { |
| 171 | buf[ofs] = '\n'; |
| 172 | ofs++; |
| 173 | } |
| 174 | |
| 175 | while (ofs < CIFS_MF_SYMLINK_FILE_SIZE) { |
| 176 | buf[ofs] = ' '; |
| 177 | ofs++; |
| 178 | } |
| 179 | |
| 180 | return 0; |
| 181 | } |
| 182 | |
Stefan Metzmacher | 8713d01 | 2010-08-05 21:15:22 +0200 | [diff] [blame] | 183 | static int |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 184 | CIFSCreateMFSymLink(const unsigned int xid, struct cifs_tcon *tcon, |
Stefan Metzmacher | 8713d01 | 2010-08-05 21:15:22 +0200 | [diff] [blame] | 185 | const char *fromName, const char *toName, |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 186 | struct cifs_sb_info *cifs_sb) |
Stefan Metzmacher | 8713d01 | 2010-08-05 21:15:22 +0200 | [diff] [blame] | 187 | { |
| 188 | int rc; |
| 189 | int oplock = 0; |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 190 | int remap; |
| 191 | int create_options = CREATE_NOT_DIR; |
Stefan Metzmacher | 8713d01 | 2010-08-05 21:15:22 +0200 | [diff] [blame] | 192 | __u16 netfid = 0; |
| 193 | u8 *buf; |
| 194 | unsigned int bytes_written = 0; |
Pavel Shilovsky | fa2989f | 2011-05-26 10:01:59 +0400 | [diff] [blame] | 195 | struct cifs_io_parms io_parms; |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 196 | struct nls_table *nls_codepage; |
| 197 | |
| 198 | nls_codepage = cifs_sb->local_nls; |
| 199 | remap = cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR; |
Stefan Metzmacher | 8713d01 | 2010-08-05 21:15:22 +0200 | [diff] [blame] | 200 | |
| 201 | buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL); |
| 202 | if (!buf) |
| 203 | return -ENOMEM; |
| 204 | |
| 205 | rc = CIFSFormatMFSymlink(buf, CIFS_MF_SYMLINK_FILE_SIZE, toName); |
| 206 | if (rc != 0) { |
| 207 | kfree(buf); |
| 208 | return rc; |
| 209 | } |
| 210 | |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 211 | if (backup_cred(cifs_sb)) |
| 212 | create_options |= CREATE_OPEN_BACKUP_INTENT; |
| 213 | |
Stefan Metzmacher | 8713d01 | 2010-08-05 21:15:22 +0200 | [diff] [blame] | 214 | rc = CIFSSMBOpen(xid, tcon, fromName, FILE_CREATE, GENERIC_WRITE, |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 215 | create_options, &netfid, &oplock, NULL, |
Stefan Metzmacher | 8713d01 | 2010-08-05 21:15:22 +0200 | [diff] [blame] | 216 | nls_codepage, remap); |
| 217 | if (rc != 0) { |
| 218 | kfree(buf); |
| 219 | return rc; |
| 220 | } |
| 221 | |
Pavel Shilovsky | fa2989f | 2011-05-26 10:01:59 +0400 | [diff] [blame] | 222 | io_parms.netfid = netfid; |
| 223 | io_parms.pid = current->tgid; |
| 224 | io_parms.tcon = tcon; |
| 225 | io_parms.offset = 0; |
| 226 | io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE; |
| 227 | |
| 228 | rc = CIFSSMBWrite(xid, &io_parms, &bytes_written, buf, NULL, 0); |
Stefan Metzmacher | 8713d01 | 2010-08-05 21:15:22 +0200 | [diff] [blame] | 229 | CIFSSMBClose(xid, tcon, netfid); |
| 230 | kfree(buf); |
| 231 | if (rc != 0) |
| 232 | return rc; |
| 233 | |
| 234 | if (bytes_written != CIFS_MF_SYMLINK_FILE_SIZE) |
| 235 | return -EIO; |
| 236 | |
| 237 | return 0; |
| 238 | } |
| 239 | |
| 240 | static int |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 241 | CIFSQueryMFSymLink(const unsigned int xid, struct cifs_tcon *tcon, |
Stefan Metzmacher | 0fd43ae | 2010-08-05 21:13:44 +0200 | [diff] [blame] | 242 | const unsigned char *searchName, char **symlinkinfo, |
| 243 | const struct nls_table *nls_codepage, int remap) |
| 244 | { |
| 245 | int rc; |
| 246 | int oplock = 0; |
| 247 | __u16 netfid = 0; |
| 248 | u8 *buf; |
| 249 | char *pbuf; |
| 250 | unsigned int bytes_read = 0; |
| 251 | int buf_type = CIFS_NO_BUFFER; |
| 252 | unsigned int link_len = 0; |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 253 | struct cifs_io_parms io_parms; |
Stefan Metzmacher | 0fd43ae | 2010-08-05 21:13:44 +0200 | [diff] [blame] | 254 | FILE_ALL_INFO file_info; |
| 255 | |
| 256 | rc = CIFSSMBOpen(xid, tcon, searchName, FILE_OPEN, GENERIC_READ, |
| 257 | CREATE_NOT_DIR, &netfid, &oplock, &file_info, |
| 258 | nls_codepage, remap); |
| 259 | if (rc != 0) |
| 260 | return rc; |
| 261 | |
Steve French | 5443d13 | 2011-03-13 05:08:25 +0000 | [diff] [blame] | 262 | if (file_info.EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE)) { |
Stefan Metzmacher | 0fd43ae | 2010-08-05 21:13:44 +0200 | [diff] [blame] | 263 | CIFSSMBClose(xid, tcon, netfid); |
| 264 | /* it's not a symlink */ |
| 265 | return -EINVAL; |
| 266 | } |
| 267 | |
| 268 | buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL); |
| 269 | if (!buf) |
| 270 | return -ENOMEM; |
| 271 | pbuf = buf; |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 272 | io_parms.netfid = netfid; |
| 273 | io_parms.pid = current->tgid; |
| 274 | io_parms.tcon = tcon; |
| 275 | io_parms.offset = 0; |
| 276 | io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE; |
Stefan Metzmacher | 0fd43ae | 2010-08-05 21:13:44 +0200 | [diff] [blame] | 277 | |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 278 | rc = CIFSSMBRead(xid, &io_parms, &bytes_read, &pbuf, &buf_type); |
Stefan Metzmacher | 0fd43ae | 2010-08-05 21:13:44 +0200 | [diff] [blame] | 279 | CIFSSMBClose(xid, tcon, netfid); |
| 280 | if (rc != 0) { |
| 281 | kfree(buf); |
| 282 | return rc; |
| 283 | } |
| 284 | |
| 285 | rc = CIFSParseMFSymlink(buf, bytes_read, &link_len, symlinkinfo); |
| 286 | kfree(buf); |
| 287 | if (rc != 0) |
| 288 | return rc; |
| 289 | |
| 290 | return 0; |
| 291 | } |
| 292 | |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 293 | bool |
| 294 | CIFSCouldBeMFSymlink(const struct cifs_fattr *fattr) |
| 295 | { |
| 296 | if (!(fattr->cf_mode & S_IFREG)) |
| 297 | /* it's not a symlink */ |
| 298 | return false; |
| 299 | |
| 300 | if (fattr->cf_eof != CIFS_MF_SYMLINK_FILE_SIZE) |
| 301 | /* it's not a symlink */ |
| 302 | return false; |
| 303 | |
| 304 | return true; |
| 305 | } |
| 306 | |
| 307 | int |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 308 | open_query_close_cifs_symlink(const unsigned char *path, char *pbuf, |
| 309 | unsigned int *pbytes_read, struct cifs_sb_info *cifs_sb, |
| 310 | unsigned int xid) |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 311 | { |
| 312 | int rc; |
| 313 | int oplock = 0; |
| 314 | __u16 netfid = 0; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 315 | struct tcon_link *tlink; |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 316 | struct cifs_tcon *ptcon; |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 317 | struct cifs_io_parms io_parms; |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 318 | int buf_type = CIFS_NO_BUFFER; |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 319 | FILE_ALL_INFO file_info; |
| 320 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 321 | tlink = cifs_sb_tlink(cifs_sb); |
| 322 | if (IS_ERR(tlink)) |
| 323 | return PTR_ERR(tlink); |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 324 | ptcon = tlink_tcon(tlink); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 325 | |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 326 | rc = CIFSSMBOpen(xid, ptcon, path, FILE_OPEN, GENERIC_READ, |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 327 | CREATE_NOT_DIR, &netfid, &oplock, &file_info, |
| 328 | cifs_sb->local_nls, |
| 329 | cifs_sb->mnt_cifs_flags & |
| 330 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 331 | if (rc != 0) { |
| 332 | cifs_put_tlink(tlink); |
| 333 | return rc; |
| 334 | } |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 335 | |
Steve French | 5443d13 | 2011-03-13 05:08:25 +0000 | [diff] [blame] | 336 | if (file_info.EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE)) { |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 337 | CIFSSMBClose(xid, ptcon, netfid); |
| 338 | cifs_put_tlink(tlink); |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 339 | /* it's not a symlink */ |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 340 | return rc; |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 341 | } |
| 342 | |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 343 | io_parms.netfid = netfid; |
| 344 | io_parms.pid = current->tgid; |
| 345 | io_parms.tcon = ptcon; |
| 346 | io_parms.offset = 0; |
| 347 | io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE; |
| 348 | |
| 349 | rc = CIFSSMBRead(xid, &io_parms, pbytes_read, &pbuf, &buf_type); |
| 350 | CIFSSMBClose(xid, ptcon, netfid); |
| 351 | cifs_put_tlink(tlink); |
| 352 | return rc; |
| 353 | } |
| 354 | |
| 355 | |
| 356 | int |
Sachin Prabhu | 750b8de | 2013-11-25 17:09:48 +0000 | [diff] [blame] | 357 | CIFSCheckMFSymlink(unsigned int xid, struct cifs_tcon *tcon, |
| 358 | struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, |
| 359 | const unsigned char *path) |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 360 | { |
Sachin Prabhu | 750b8de | 2013-11-25 17:09:48 +0000 | [diff] [blame] | 361 | int rc; |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 362 | u8 *buf = NULL; |
| 363 | unsigned int link_len = 0; |
| 364 | unsigned int bytes_read = 0; |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 365 | |
| 366 | if (!CIFSCouldBeMFSymlink(fattr)) |
| 367 | /* it's not a symlink */ |
| 368 | return 0; |
| 369 | |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 370 | buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL); |
Sachin Prabhu | 750b8de | 2013-11-25 17:09:48 +0000 | [diff] [blame] | 371 | if (!buf) |
| 372 | return -ENOMEM; |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 373 | |
Sachin Prabhu | 750b8de | 2013-11-25 17:09:48 +0000 | [diff] [blame] | 374 | if (tcon->ses->server->ops->query_mf_symlink) |
| 375 | rc = tcon->ses->server->ops->query_mf_symlink(path, buf, |
| 376 | &bytes_read, cifs_sb, xid); |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 377 | else |
Sachin Prabhu | 750b8de | 2013-11-25 17:09:48 +0000 | [diff] [blame] | 378 | rc = -ENOSYS; |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 379 | |
Sachin Prabhu | 750b8de | 2013-11-25 17:09:48 +0000 | [diff] [blame] | 380 | if (rc) |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 381 | goto out; |
| 382 | |
| 383 | if (bytes_read == 0) /* not a symlink */ |
| 384 | goto out; |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 385 | |
| 386 | rc = CIFSParseMFSymlink(buf, bytes_read, &link_len, NULL); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 387 | if (rc == -EINVAL) { |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 388 | /* it's not a symlink */ |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 389 | rc = 0; |
| 390 | goto out; |
| 391 | } |
| 392 | |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 393 | if (rc != 0) |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 394 | goto out; |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 395 | |
| 396 | /* it is a symlink */ |
| 397 | fattr->cf_eof = link_len; |
| 398 | fattr->cf_mode &= ~S_IFMT; |
| 399 | fattr->cf_mode |= S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO; |
| 400 | fattr->cf_dtype = DT_LNK; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 401 | out: |
Steve French | 1b24408 | 2013-07-11 19:17:40 -0500 | [diff] [blame] | 402 | kfree(buf); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 403 | return rc; |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 404 | } |
| 405 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | int |
| 407 | cifs_hardlink(struct dentry *old_file, struct inode *inode, |
| 408 | struct dentry *direntry) |
| 409 | { |
| 410 | int rc = -EACCES; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 411 | unsigned int xid; |
Steve French | d6e906f | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 412 | char *from_name = NULL; |
| 413 | char *to_name = NULL; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 414 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| 415 | struct tcon_link *tlink; |
Steve French | d6e906f | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 416 | struct cifs_tcon *tcon; |
| 417 | struct TCP_Server_Info *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | struct cifsInodeInfo *cifsInode; |
| 419 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 420 | tlink = cifs_sb_tlink(cifs_sb); |
| 421 | if (IS_ERR(tlink)) |
| 422 | return PTR_ERR(tlink); |
Steve French | d6e906f | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 423 | tcon = tlink_tcon(tlink); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 424 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 425 | xid = get_xid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | |
Steve French | d6e906f | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 427 | from_name = build_path_from_dentry(old_file); |
| 428 | to_name = build_path_from_dentry(direntry); |
| 429 | if ((from_name == NULL) || (to_name == NULL)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | rc = -ENOMEM; |
| 431 | goto cifs_hl_exit; |
| 432 | } |
| 433 | |
Steve French | d6e906f | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 434 | if (tcon->unix_ext) |
| 435 | rc = CIFSUnixCreateHardLink(xid, tcon, from_name, to_name, |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 436 | cifs_sb->local_nls, |
| 437 | cifs_sb->mnt_cifs_flags & |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 438 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | else { |
Steve French | d6e906f | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 440 | server = tcon->ses->server; |
| 441 | if (!server->ops->create_hardlink) |
| 442 | return -ENOSYS; |
| 443 | rc = server->ops->create_hardlink(xid, tcon, from_name, to_name, |
| 444 | cifs_sb); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 445 | if ((rc == -EIO) || (rc == -EINVAL)) |
| 446 | rc = -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | } |
| 448 | |
Steve French | 31ec35d | 2006-11-16 20:54:20 +0000 | [diff] [blame] | 449 | d_drop(direntry); /* force new lookup from server of target */ |
| 450 | |
Steve French | d6e906f | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 451 | /* |
| 452 | * if source file is cached (oplocked) revalidate will not go to server |
| 453 | * until the file is closed or oplock broken so update nlinks locally |
| 454 | */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 455 | if (old_file->d_inode) { |
Steve French | 31ec35d | 2006-11-16 20:54:20 +0000 | [diff] [blame] | 456 | cifsInode = CIFS_I(old_file->d_inode); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 457 | if (rc == 0) { |
Steve French | b7ca692 | 2012-08-03 08:43:01 -0500 | [diff] [blame] | 458 | spin_lock(&old_file->d_inode->i_lock); |
Miklos Szeredi | 6d6b77f | 2011-10-28 14:13:28 +0200 | [diff] [blame] | 459 | inc_nlink(old_file->d_inode); |
Steve French | b7ca692 | 2012-08-03 08:43:01 -0500 | [diff] [blame] | 460 | spin_unlock(&old_file->d_inode->i_lock); |
Steve French | d6e906f | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 461 | /* |
| 462 | * BB should we make this contingent on superblock flag |
| 463 | * NOATIME? |
| 464 | */ |
| 465 | /* old_file->d_inode->i_ctime = CURRENT_TIME; */ |
| 466 | /* |
| 467 | * parent dir timestamps will update from srv within a |
| 468 | * second, would it really be worth it to set the parent |
| 469 | * dir cifs inode time to zero to force revalidate |
| 470 | * (faster) for it too? |
| 471 | */ |
Steve French | 31ec35d | 2006-11-16 20:54:20 +0000 | [diff] [blame] | 472 | } |
Steve French | d6e906f | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 473 | /* |
| 474 | * if not oplocked will force revalidate to get info on source |
| 475 | * file from srv |
| 476 | */ |
Steve French | 31ec35d | 2006-11-16 20:54:20 +0000 | [diff] [blame] | 477 | cifsInode->time = 0; |
| 478 | |
Steve French | d6e906f | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 479 | /* |
| 480 | * Will update parent dir timestamps from srv within a second. |
| 481 | * Would it really be worth it to set the parent dir (cifs |
| 482 | * inode) time field to zero to force revalidate on parent |
| 483 | * directory faster ie |
| 484 | * |
| 485 | * CIFS_I(inode)->time = 0; |
| 486 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | |
| 489 | cifs_hl_exit: |
Steve French | d6e906f | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 490 | kfree(from_name); |
| 491 | kfree(to_name); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 492 | free_xid(xid); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 493 | cifs_put_tlink(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | return rc; |
| 495 | } |
| 496 | |
Linus Torvalds | cc314ee | 2005-08-19 18:02:56 -0700 | [diff] [blame] | 497 | void * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | cifs_follow_link(struct dentry *direntry, struct nameidata *nd) |
| 499 | { |
| 500 | struct inode *inode = direntry->d_inode; |
Jeff Layton | 8b6427a | 2009-05-19 09:57:03 -0400 | [diff] [blame] | 501 | int rc = -ENOMEM; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 502 | unsigned int xid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | char *full_path = NULL; |
Jeff Layton | 8b6427a | 2009-05-19 09:57:03 -0400 | [diff] [blame] | 504 | char *target_path = NULL; |
| 505 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 506 | struct tcon_link *tlink = NULL; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 507 | struct cifs_tcon *tcon; |
Pavel Shilovsky | b42bf88 | 2013-08-14 19:25:21 +0400 | [diff] [blame] | 508 | struct TCP_Server_Info *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 510 | xid = get_xid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 512 | tlink = cifs_sb_tlink(cifs_sb); |
| 513 | if (IS_ERR(tlink)) { |
| 514 | rc = PTR_ERR(tlink); |
| 515 | tlink = NULL; |
| 516 | goto out; |
| 517 | } |
| 518 | tcon = tlink_tcon(tlink); |
Pavel Shilovsky | b42bf88 | 2013-08-14 19:25:21 +0400 | [diff] [blame] | 519 | server = tcon->ses->server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | |
Jeff Layton | 8b6427a | 2009-05-19 09:57:03 -0400 | [diff] [blame] | 521 | full_path = build_path_from_dentry(direntry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | if (!full_path) |
Jeff Layton | 460b969 | 2009-04-30 07:17:56 -0400 | [diff] [blame] | 523 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 525 | cifs_dbg(FYI, "Full path: %s inode = 0x%p\n", full_path, inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | |
Stefan Metzmacher | 1b12b9c | 2010-08-05 21:19:56 +0200 | [diff] [blame] | 527 | rc = -EACCES; |
| 528 | /* |
| 529 | * First try Minshall+French Symlinks, if configured |
| 530 | * and fallback to UNIX Extensions Symlinks. |
| 531 | */ |
| 532 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
| 533 | rc = CIFSQueryMFSymLink(xid, tcon, full_path, &target_path, |
| 534 | cifs_sb->local_nls, |
| 535 | cifs_sb->mnt_cifs_flags & |
| 536 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 537 | |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 538 | if ((rc != 0) && cap_unix(tcon->ses)) |
Stefan Metzmacher | 1b12b9c | 2010-08-05 21:19:56 +0200 | [diff] [blame] | 539 | rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, &target_path, |
| 540 | cifs_sb->local_nls); |
Pavel Shilovsky | b42bf88 | 2013-08-14 19:25:21 +0400 | [diff] [blame] | 541 | else if (rc != 0 && server->ops->query_symlink) |
| 542 | rc = server->ops->query_symlink(xid, tcon, full_path, |
| 543 | &target_path, cifs_sb); |
Stefan Metzmacher | 1b12b9c | 2010-08-05 21:19:56 +0200 | [diff] [blame] | 544 | |
Jeff Layton | 8b6427a | 2009-05-19 09:57:03 -0400 | [diff] [blame] | 545 | kfree(full_path); |
| 546 | out: |
Jeff Layton | 460b969 | 2009-04-30 07:17:56 -0400 | [diff] [blame] | 547 | if (rc != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | kfree(target_path); |
| 549 | target_path = ERR_PTR(rc); |
| 550 | } |
| 551 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 552 | free_xid(xid); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 553 | if (tlink) |
| 554 | cifs_put_tlink(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | nd_set_link(nd, target_path); |
Jeff Layton | 460b969 | 2009-04-30 07:17:56 -0400 | [diff] [blame] | 556 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | int |
| 560 | cifs_symlink(struct inode *inode, struct dentry *direntry, const char *symname) |
| 561 | { |
| 562 | int rc = -EOPNOTSUPP; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 563 | unsigned int xid; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 564 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| 565 | struct tcon_link *tlink; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 566 | struct cifs_tcon *pTcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | char *full_path = NULL; |
| 568 | struct inode *newinode = NULL; |
| 569 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 570 | xid = get_xid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 572 | tlink = cifs_sb_tlink(cifs_sb); |
| 573 | if (IS_ERR(tlink)) { |
| 574 | rc = PTR_ERR(tlink); |
| 575 | goto symlink_exit; |
| 576 | } |
| 577 | pTcon = tlink_tcon(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | |
Steve French | 7f57356 | 2005-08-30 11:32:14 -0700 | [diff] [blame] | 579 | full_path = build_path_from_dentry(direntry); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 580 | if (full_path == NULL) { |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 581 | rc = -ENOMEM; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 582 | goto symlink_exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | } |
| 584 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 585 | cifs_dbg(FYI, "Full path: %s\n", full_path); |
| 586 | cifs_dbg(FYI, "symname is %s\n", symname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | |
| 588 | /* BB what if DFS and this volume is on different share? BB */ |
Stefan Metzmacher | 1b12b9c | 2010-08-05 21:19:56 +0200 | [diff] [blame] | 589 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
| 590 | rc = CIFSCreateMFSymLink(xid, pTcon, full_path, symname, |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 591 | cifs_sb); |
Stefan Metzmacher | 1b12b9c | 2010-08-05 21:19:56 +0200 | [diff] [blame] | 592 | else if (pTcon->unix_ext) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | rc = CIFSUnixCreateSymLink(xid, pTcon, full_path, symname, |
| 594 | cifs_sb->local_nls); |
| 595 | /* else |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 596 | rc = CIFSCreateReparseSymLink(xid, pTcon, fromName, toName, |
| 597 | cifs_sb_target->local_nls); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | |
| 599 | if (rc == 0) { |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 600 | if (pTcon->unix_ext) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 602 | inode->i_sb, xid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | else |
| 604 | rc = cifs_get_inode_info(&newinode, full_path, NULL, |
Steve French | 8b1327f | 2008-03-14 22:37:16 +0000 | [diff] [blame] | 605 | inode->i_sb, xid, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | |
| 607 | if (rc != 0) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 608 | cifs_dbg(FYI, "Create symlink ok, getinodeinfo fail rc = %d\n", |
| 609 | rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | d_instantiate(direntry, newinode); |
| 612 | } |
| 613 | } |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 614 | symlink_exit: |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 615 | kfree(full_path); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 616 | cifs_put_tlink(tlink); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 617 | free_xid(xid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | return rc; |
| 619 | } |