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 | #include "md5.h" |
| 32 | |
| 33 | #define CIFS_MF_SYMLINK_LEN_OFFSET (4+1) |
| 34 | #define CIFS_MF_SYMLINK_MD5_OFFSET (CIFS_MF_SYMLINK_LEN_OFFSET+(4+1)) |
| 35 | #define CIFS_MF_SYMLINK_LINK_OFFSET (CIFS_MF_SYMLINK_MD5_OFFSET+(32+1)) |
| 36 | #define CIFS_MF_SYMLINK_LINK_MAXLEN (1024) |
| 37 | #define CIFS_MF_SYMLINK_FILE_SIZE \ |
| 38 | (CIFS_MF_SYMLINK_LINK_OFFSET + CIFS_MF_SYMLINK_LINK_MAXLEN) |
| 39 | |
| 40 | #define CIFS_MF_SYMLINK_LEN_FORMAT "XSym\n%04u\n" |
| 41 | #define CIFS_MF_SYMLINK_MD5_FORMAT \ |
| 42 | "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n" |
| 43 | #define CIFS_MF_SYMLINK_MD5_ARGS(md5_hash) \ |
| 44 | md5_hash[0], md5_hash[1], md5_hash[2], md5_hash[3], \ |
| 45 | md5_hash[4], md5_hash[5], md5_hash[6], md5_hash[7], \ |
| 46 | md5_hash[8], md5_hash[9], md5_hash[10], md5_hash[11],\ |
| 47 | md5_hash[12], md5_hash[13], md5_hash[14], md5_hash[15] |
| 48 | |
| 49 | static int |
| 50 | CIFSParseMFSymlink(const u8 *buf, |
| 51 | unsigned int buf_len, |
| 52 | unsigned int *_link_len, |
| 53 | char **_link_str) |
| 54 | { |
| 55 | int rc; |
| 56 | unsigned int link_len; |
| 57 | const char *md5_str1; |
| 58 | const char *link_str; |
| 59 | struct MD5Context md5_ctx; |
| 60 | u8 md5_hash[16]; |
| 61 | char md5_str2[34]; |
| 62 | |
| 63 | if (buf_len != CIFS_MF_SYMLINK_FILE_SIZE) |
| 64 | return -EINVAL; |
| 65 | |
| 66 | md5_str1 = (const char *)&buf[CIFS_MF_SYMLINK_MD5_OFFSET]; |
| 67 | link_str = (const char *)&buf[CIFS_MF_SYMLINK_LINK_OFFSET]; |
| 68 | |
| 69 | rc = sscanf(buf, CIFS_MF_SYMLINK_LEN_FORMAT, &link_len); |
| 70 | if (rc != 1) |
| 71 | return -EINVAL; |
| 72 | |
| 73 | cifs_MD5_init(&md5_ctx); |
| 74 | cifs_MD5_update(&md5_ctx, (const u8 *)link_str, link_len); |
| 75 | cifs_MD5_final(md5_hash, &md5_ctx); |
| 76 | |
| 77 | snprintf(md5_str2, sizeof(md5_str2), |
| 78 | CIFS_MF_SYMLINK_MD5_FORMAT, |
| 79 | CIFS_MF_SYMLINK_MD5_ARGS(md5_hash)); |
| 80 | |
| 81 | if (strncmp(md5_str1, md5_str2, 17) != 0) |
| 82 | return -EINVAL; |
| 83 | |
| 84 | if (_link_str) { |
| 85 | *_link_str = kstrndup(link_str, link_len, GFP_KERNEL); |
| 86 | if (!*_link_str) |
| 87 | return -ENOMEM; |
| 88 | } |
| 89 | |
| 90 | *_link_len = link_len; |
| 91 | return 0; |
| 92 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
Stefan Metzmacher | 0fd43ae | 2010-08-05 21:13:44 +0200 | [diff] [blame^] | 94 | static int |
| 95 | CIFSQueryMFSymLink(const int xid, struct cifsTconInfo *tcon, |
| 96 | const unsigned char *searchName, char **symlinkinfo, |
| 97 | const struct nls_table *nls_codepage, int remap) |
| 98 | { |
| 99 | int rc; |
| 100 | int oplock = 0; |
| 101 | __u16 netfid = 0; |
| 102 | u8 *buf; |
| 103 | char *pbuf; |
| 104 | unsigned int bytes_read = 0; |
| 105 | int buf_type = CIFS_NO_BUFFER; |
| 106 | unsigned int link_len = 0; |
| 107 | FILE_ALL_INFO file_info; |
| 108 | |
| 109 | rc = CIFSSMBOpen(xid, tcon, searchName, FILE_OPEN, GENERIC_READ, |
| 110 | CREATE_NOT_DIR, &netfid, &oplock, &file_info, |
| 111 | nls_codepage, remap); |
| 112 | if (rc != 0) |
| 113 | return rc; |
| 114 | |
| 115 | if (file_info.EndOfFile != CIFS_MF_SYMLINK_FILE_SIZE) { |
| 116 | CIFSSMBClose(xid, tcon, netfid); |
| 117 | /* it's not a symlink */ |
| 118 | return -EINVAL; |
| 119 | } |
| 120 | |
| 121 | buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL); |
| 122 | if (!buf) |
| 123 | return -ENOMEM; |
| 124 | pbuf = buf; |
| 125 | |
| 126 | rc = CIFSSMBRead(xid, tcon, netfid, |
| 127 | CIFS_MF_SYMLINK_FILE_SIZE /* length */, |
| 128 | 0 /* offset */, |
| 129 | &bytes_read, &pbuf, &buf_type); |
| 130 | CIFSSMBClose(xid, tcon, netfid); |
| 131 | if (rc != 0) { |
| 132 | kfree(buf); |
| 133 | return rc; |
| 134 | } |
| 135 | |
| 136 | rc = CIFSParseMFSymlink(buf, bytes_read, &link_len, symlinkinfo); |
| 137 | kfree(buf); |
| 138 | if (rc != 0) |
| 139 | return rc; |
| 140 | |
| 141 | return 0; |
| 142 | } |
| 143 | |
Stefan Metzmacher | 8bfb50a | 2010-07-31 09:15:10 +0200 | [diff] [blame] | 144 | bool |
| 145 | CIFSCouldBeMFSymlink(const struct cifs_fattr *fattr) |
| 146 | { |
| 147 | if (!(fattr->cf_mode & S_IFREG)) |
| 148 | /* it's not a symlink */ |
| 149 | return false; |
| 150 | |
| 151 | if (fattr->cf_eof != CIFS_MF_SYMLINK_FILE_SIZE) |
| 152 | /* it's not a symlink */ |
| 153 | return false; |
| 154 | |
| 155 | return true; |
| 156 | } |
| 157 | |
| 158 | int |
| 159 | CIFSCheckMFSymlink(struct cifs_fattr *fattr, |
| 160 | const unsigned char *path, |
| 161 | struct cifs_sb_info *cifs_sb, int xid) |
| 162 | { |
| 163 | int rc; |
| 164 | int oplock = 0; |
| 165 | __u16 netfid = 0; |
| 166 | struct cifsTconInfo *pTcon = cifs_sb->tcon; |
| 167 | u8 *buf; |
| 168 | char *pbuf; |
| 169 | unsigned int bytes_read = 0; |
| 170 | int buf_type = CIFS_NO_BUFFER; |
| 171 | unsigned int link_len = 0; |
| 172 | FILE_ALL_INFO file_info; |
| 173 | |
| 174 | if (!CIFSCouldBeMFSymlink(fattr)) |
| 175 | /* it's not a symlink */ |
| 176 | return 0; |
| 177 | |
| 178 | rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, |
| 179 | CREATE_NOT_DIR, &netfid, &oplock, &file_info, |
| 180 | cifs_sb->local_nls, |
| 181 | cifs_sb->mnt_cifs_flags & |
| 182 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 183 | if (rc != 0) |
| 184 | return rc; |
| 185 | |
| 186 | if (file_info.EndOfFile != CIFS_MF_SYMLINK_FILE_SIZE) { |
| 187 | CIFSSMBClose(xid, pTcon, netfid); |
| 188 | /* it's not a symlink */ |
| 189 | return 0; |
| 190 | } |
| 191 | |
| 192 | buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL); |
| 193 | if (!buf) |
| 194 | return -ENOMEM; |
| 195 | pbuf = buf; |
| 196 | |
| 197 | rc = CIFSSMBRead(xid, pTcon, netfid, |
| 198 | CIFS_MF_SYMLINK_FILE_SIZE /* length */, |
| 199 | 0 /* offset */, |
| 200 | &bytes_read, &pbuf, &buf_type); |
| 201 | CIFSSMBClose(xid, pTcon, netfid); |
| 202 | if (rc != 0) { |
| 203 | kfree(buf); |
| 204 | return rc; |
| 205 | } |
| 206 | |
| 207 | rc = CIFSParseMFSymlink(buf, bytes_read, &link_len, NULL); |
| 208 | kfree(buf); |
| 209 | if (rc == -EINVAL) |
| 210 | /* it's not a symlink */ |
| 211 | return 0; |
| 212 | if (rc != 0) |
| 213 | return rc; |
| 214 | |
| 215 | /* it is a symlink */ |
| 216 | fattr->cf_eof = link_len; |
| 217 | fattr->cf_mode &= ~S_IFMT; |
| 218 | fattr->cf_mode |= S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO; |
| 219 | fattr->cf_dtype = DT_LNK; |
| 220 | return 0; |
| 221 | } |
| 222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | int |
| 224 | cifs_hardlink(struct dentry *old_file, struct inode *inode, |
| 225 | struct dentry *direntry) |
| 226 | { |
| 227 | int rc = -EACCES; |
| 228 | int xid; |
| 229 | char *fromName = NULL; |
| 230 | char *toName = NULL; |
| 231 | struct cifs_sb_info *cifs_sb_target; |
| 232 | struct cifsTconInfo *pTcon; |
| 233 | struct cifsInodeInfo *cifsInode; |
| 234 | |
| 235 | xid = GetXid(); |
| 236 | |
| 237 | cifs_sb_target = CIFS_SB(inode->i_sb); |
| 238 | pTcon = cifs_sb_target->tcon; |
| 239 | |
| 240 | /* No need to check for cross device links since server will do that |
| 241 | BB note DFS case in future though (when we may have to check) */ |
| 242 | |
Steve French | 7f57356 | 2005-08-30 11:32:14 -0700 | [diff] [blame] | 243 | fromName = build_path_from_dentry(old_file); |
| 244 | toName = build_path_from_dentry(direntry); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 245 | if ((fromName == NULL) || (toName == NULL)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | rc = -ENOMEM; |
| 247 | goto cifs_hl_exit; |
| 248 | } |
| 249 | |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 250 | /* if (cifs_sb_target->tcon->ses->capabilities & CAP_UNIX)*/ |
| 251 | if (pTcon->unix_ext) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | rc = CIFSUnixCreateHardLink(xid, pTcon, fromName, toName, |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 253 | cifs_sb_target->local_nls, |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 254 | cifs_sb_target->mnt_cifs_flags & |
| 255 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | else { |
| 257 | rc = CIFSCreateHardLink(xid, pTcon, fromName, toName, |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 258 | cifs_sb_target->local_nls, |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 259 | cifs_sb_target->mnt_cifs_flags & |
| 260 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 261 | if ((rc == -EIO) || (rc == -EINVAL)) |
| 262 | rc = -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | } |
| 264 | |
Steve French | 31ec35d | 2006-11-16 20:54:20 +0000 | [diff] [blame] | 265 | d_drop(direntry); /* force new lookup from server of target */ |
| 266 | |
| 267 | /* if source file is cached (oplocked) revalidate will not go to server |
| 268 | until the file is closed or oplock broken so update nlinks locally */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 269 | if (old_file->d_inode) { |
Steve French | 31ec35d | 2006-11-16 20:54:20 +0000 | [diff] [blame] | 270 | cifsInode = CIFS_I(old_file->d_inode); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 271 | if (rc == 0) { |
Steve French | 31ec35d | 2006-11-16 20:54:20 +0000 | [diff] [blame] | 272 | old_file->d_inode->i_nlink++; |
Steve French | 1b2b212 | 2007-02-17 04:30:54 +0000 | [diff] [blame] | 273 | /* BB should we make this contingent on superblock flag NOATIME? */ |
| 274 | /* old_file->d_inode->i_ctime = CURRENT_TIME;*/ |
Steve French | 31ec35d | 2006-11-16 20:54:20 +0000 | [diff] [blame] | 275 | /* parent dir timestamps will update from srv |
| 276 | within a second, would it really be worth it |
| 277 | to set the parent dir cifs inode time to zero |
| 278 | to force revalidate (faster) for it too? */ |
| 279 | } |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 280 | /* if not oplocked will force revalidate to get info |
Steve French | 31ec35d | 2006-11-16 20:54:20 +0000 | [diff] [blame] | 281 | on source file from srv */ |
| 282 | cifsInode->time = 0; |
| 283 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 284 | /* Will update parent dir timestamps from srv within a second. |
Steve French | 31ec35d | 2006-11-16 20:54:20 +0000 | [diff] [blame] | 285 | Would it really be worth it to set the parent dir (cifs |
| 286 | inode) time field to zero to force revalidate on parent |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 287 | directory faster ie |
Steve French | 31ec35d | 2006-11-16 20:54:20 +0000 | [diff] [blame] | 288 | CIFS_I(inode)->time = 0; */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
| 291 | cifs_hl_exit: |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 292 | kfree(fromName); |
| 293 | kfree(toName); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | FreeXid(xid); |
| 295 | return rc; |
| 296 | } |
| 297 | |
Linus Torvalds | cc314ee | 2005-08-19 18:02:56 -0700 | [diff] [blame] | 298 | void * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | cifs_follow_link(struct dentry *direntry, struct nameidata *nd) |
| 300 | { |
| 301 | struct inode *inode = direntry->d_inode; |
Jeff Layton | 8b6427a | 2009-05-19 09:57:03 -0400 | [diff] [blame] | 302 | int rc = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | int xid; |
| 304 | char *full_path = NULL; |
Jeff Layton | 8b6427a | 2009-05-19 09:57:03 -0400 | [diff] [blame] | 305 | char *target_path = NULL; |
| 306 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| 307 | struct cifsTconInfo *tcon = cifs_sb->tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | |
| 309 | xid = GetXid(); |
| 310 | |
Jeff Layton | 8b6427a | 2009-05-19 09:57:03 -0400 | [diff] [blame] | 311 | /* |
| 312 | * For now, we just handle symlinks with unix extensions enabled. |
| 313 | * Eventually we should handle NTFS reparse points, and MacOS |
| 314 | * symlink support. For instance... |
| 315 | * |
| 316 | * rc = CIFSSMBQueryReparseLinkInfo(...) |
| 317 | * |
| 318 | * For now, just return -EACCES when the server doesn't support posix |
| 319 | * extensions. Note that we still allow querying symlinks when posix |
| 320 | * extensions are manually disabled. We could disable these as well |
| 321 | * but there doesn't seem to be any harm in allowing the client to |
| 322 | * read them. |
| 323 | */ |
| 324 | if (!(tcon->ses->capabilities & CAP_UNIX)) { |
| 325 | rc = -EACCES; |
| 326 | goto out; |
| 327 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | |
Jeff Layton | 8b6427a | 2009-05-19 09:57:03 -0400 | [diff] [blame] | 329 | full_path = build_path_from_dentry(direntry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | if (!full_path) |
Jeff Layton | 460b969 | 2009-04-30 07:17:56 -0400 | [diff] [blame] | 331 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 333 | cFYI(1, "Full path: %s inode = 0x%p", full_path, inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | |
Jeff Layton | 8b6427a | 2009-05-19 09:57:03 -0400 | [diff] [blame] | 335 | rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, &target_path, |
| 336 | cifs_sb->local_nls); |
| 337 | kfree(full_path); |
| 338 | out: |
Jeff Layton | 460b969 | 2009-04-30 07:17:56 -0400 | [diff] [blame] | 339 | if (rc != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | kfree(target_path); |
| 341 | target_path = ERR_PTR(rc); |
| 342 | } |
| 343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | FreeXid(xid); |
| 345 | nd_set_link(nd, target_path); |
Jeff Layton | 460b969 | 2009-04-30 07:17:56 -0400 | [diff] [blame] | 346 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | int |
| 350 | cifs_symlink(struct inode *inode, struct dentry *direntry, const char *symname) |
| 351 | { |
| 352 | int rc = -EOPNOTSUPP; |
| 353 | int xid; |
| 354 | struct cifs_sb_info *cifs_sb; |
| 355 | struct cifsTconInfo *pTcon; |
| 356 | char *full_path = NULL; |
| 357 | struct inode *newinode = NULL; |
| 358 | |
| 359 | xid = GetXid(); |
| 360 | |
| 361 | cifs_sb = CIFS_SB(inode->i_sb); |
| 362 | pTcon = cifs_sb->tcon; |
| 363 | |
Steve French | 7f57356 | 2005-08-30 11:32:14 -0700 | [diff] [blame] | 364 | full_path = build_path_from_dentry(direntry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 366 | if (full_path == NULL) { |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 367 | rc = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | FreeXid(xid); |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 369 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | } |
| 371 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 372 | cFYI(1, "Full path: %s", full_path); |
| 373 | cFYI(1, "symname is %s", symname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
| 375 | /* BB what if DFS and this volume is on different share? BB */ |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 376 | if (pTcon->unix_ext) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | rc = CIFSUnixCreateSymLink(xid, pTcon, full_path, symname, |
| 378 | cifs_sb->local_nls); |
| 379 | /* else |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 380 | rc = CIFSCreateReparseSymLink(xid, pTcon, fromName, toName, |
| 381 | cifs_sb_target->local_nls); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
| 383 | if (rc == 0) { |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 384 | if (pTcon->unix_ext) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 386 | inode->i_sb, xid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | else |
| 388 | rc = cifs_get_inode_info(&newinode, full_path, NULL, |
Steve French | 8b1327f | 2008-03-14 22:37:16 +0000 | [diff] [blame] | 389 | inode->i_sb, xid, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
| 391 | if (rc != 0) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 392 | cFYI(1, "Create symlink ok, getinodeinfo fail rc = %d", |
| 393 | rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | } else { |
Steve French | b92327f | 2005-08-22 20:09:43 -0700 | [diff] [blame] | 395 | if (pTcon->nocase) |
| 396 | direntry->d_op = &cifs_ci_dentry_ops; |
| 397 | else |
| 398 | direntry->d_op = &cifs_dentry_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | d_instantiate(direntry, newinode); |
| 400 | } |
| 401 | } |
| 402 | |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 403 | kfree(full_path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | FreeXid(xid); |
| 405 | return rc; |
| 406 | } |
| 407 | |
Linus Torvalds | cc314ee | 2005-08-19 18:02:56 -0700 | [diff] [blame] | 408 | void cifs_put_link(struct dentry *direntry, struct nameidata *nd, void *cookie) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | { |
| 410 | char *p = nd_get_link(nd); |
| 411 | if (!IS_ERR(p)) |
| 412 | kfree(p); |
| 413 | } |