Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/dir.c |
| 3 | * |
| 4 | * vfs operations that deal with dentries |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 5 | * |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 6 | * Copyright (C) International Business Machines Corp., 2002,2009 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * Author(s): Steve French (sfrench@us.ibm.com) |
| 8 | * |
| 9 | * This library is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU Lesser General Public License as published |
| 11 | * by the Free Software Foundation; either version 2.1 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This library is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 17 | * the GNU Lesser General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public License |
| 20 | * along with this library; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | */ |
| 23 | #include <linux/fs.h> |
| 24 | #include <linux/stat.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/namei.h> |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame^] | 27 | #include <linux/mount.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include "cifsfs.h" |
| 29 | #include "cifspdu.h" |
| 30 | #include "cifsglob.h" |
| 31 | #include "cifsproto.h" |
| 32 | #include "cifs_debug.h" |
| 33 | #include "cifs_fs_sb.h" |
| 34 | |
Steve French | 99ee4db | 2007-02-27 05:35:17 +0000 | [diff] [blame] | 35 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | renew_parental_timestamps(struct dentry *direntry) |
| 37 | { |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 38 | /* BB check if there is a way to get the kernel to do this or if we |
| 39 | really need this */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | do { |
| 41 | direntry->d_time = jiffies; |
| 42 | direntry = direntry->d_parent; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 43 | } while (!IS_ROOT(direntry)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | } |
| 45 | |
| 46 | /* Note: caller must free return buffer */ |
| 47 | char * |
| 48 | build_path_from_dentry(struct dentry *direntry) |
| 49 | { |
| 50 | struct dentry *temp; |
Steve French | 2fe87f0 | 2006-09-21 07:02:52 +0000 | [diff] [blame] | 51 | int namelen; |
| 52 | int pplen; |
Steve French | 646dd53 | 2008-05-15 01:50:56 +0000 | [diff] [blame] | 53 | int dfsplen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | char *full_path; |
Steve French | 8827481 | 2006-03-09 22:21:45 +0000 | [diff] [blame] | 55 | char dirsep; |
Steve French | 646dd53 | 2008-05-15 01:50:56 +0000 | [diff] [blame] | 56 | struct cifs_sb_info *cifs_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 58 | if (direntry == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | return NULL; /* not much we can do if dentry is freed and |
| 60 | we need to reopen the file after it was closed implicitly |
| 61 | when the server crashed */ |
| 62 | |
Steve French | 646dd53 | 2008-05-15 01:50:56 +0000 | [diff] [blame] | 63 | cifs_sb = CIFS_SB(direntry->d_sb); |
| 64 | dirsep = CIFS_DIR_SEP(cifs_sb); |
| 65 | pplen = cifs_sb->prepathlen; |
| 66 | if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS)) |
| 67 | dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1); |
| 68 | else |
| 69 | dfsplen = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | cifs_bp_rename_retry: |
Steve French | 646dd53 | 2008-05-15 01:50:56 +0000 | [diff] [blame] | 71 | namelen = pplen + dfsplen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | for (temp = direntry; !IS_ROOT(temp);) { |
| 73 | namelen += (1 + temp->d_name.len); |
| 74 | temp = temp->d_parent; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 75 | if (temp == NULL) { |
| 76 | cERROR(1, ("corrupt dentry")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | return NULL; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | full_path = kmalloc(namelen+1, GFP_KERNEL); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 82 | if (full_path == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | return full_path; |
| 84 | full_path[namelen] = 0; /* trailing null */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | for (temp = direntry; !IS_ROOT(temp);) { |
| 86 | namelen -= 1 + temp->d_name.len; |
| 87 | if (namelen < 0) { |
| 88 | break; |
| 89 | } else { |
Steve French | 7f57356 | 2005-08-30 11:32:14 -0700 | [diff] [blame] | 90 | full_path[namelen] = dirsep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | strncpy(full_path + namelen + 1, temp->d_name.name, |
| 92 | temp->d_name.len); |
Steve French | 2fe87f0 | 2006-09-21 07:02:52 +0000 | [diff] [blame] | 93 | cFYI(0, ("name: %s", full_path + namelen)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | } |
| 95 | temp = temp->d_parent; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 96 | if (temp == NULL) { |
| 97 | cERROR(1, ("corrupt dentry")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | kfree(full_path); |
| 99 | return NULL; |
| 100 | } |
| 101 | } |
Steve French | 646dd53 | 2008-05-15 01:50:56 +0000 | [diff] [blame] | 102 | if (namelen != pplen + dfsplen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | cERROR(1, |
Steve French | 2fe87f0 | 2006-09-21 07:02:52 +0000 | [diff] [blame] | 104 | ("did not end path lookup where expected namelen is %d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | namelen)); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 106 | /* presumably this is only possible if racing with a rename |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | of one of the parent directories (we can not lock the dentries |
| 108 | above us to prevent this, but retrying should be harmless) */ |
| 109 | kfree(full_path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | goto cifs_bp_rename_retry; |
| 111 | } |
Steve French | 2fe87f0 | 2006-09-21 07:02:52 +0000 | [diff] [blame] | 112 | /* DIR_SEP already set for byte 0 / vs \ but not for |
| 113 | subsequent slashes in prepath which currently must |
| 114 | be entered the right way - not sure if there is an alternative |
| 115 | since the '\' is a valid posix character so we can not switch |
| 116 | those safely to '/' if any are found in the middle of the prepath */ |
| 117 | /* BB test paths to Windows with '/' in the midst of prepath */ |
Steve French | 646dd53 | 2008-05-15 01:50:56 +0000 | [diff] [blame] | 118 | |
| 119 | if (dfsplen) { |
| 120 | strncpy(full_path, cifs_sb->tcon->treeName, dfsplen); |
| 121 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { |
| 122 | int i; |
| 123 | for (i = 0; i < dfsplen; i++) { |
| 124 | if (full_path[i] == '\\') |
| 125 | full_path[i] = '/'; |
| 126 | } |
| 127 | } |
| 128 | } |
| 129 | strncpy(full_path + dfsplen, CIFS_SB(direntry->d_sb)->prepath, pplen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | return full_path; |
| 131 | } |
| 132 | |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 133 | static void |
| 134 | cifs_fill_fileinfo(struct inode *newinode, __u16 fileHandle, |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame^] | 135 | struct vfsmount *mnt, bool write_only) |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 136 | { |
| 137 | int oplock = 0; |
| 138 | struct cifsFileInfo *pCifsFile; |
| 139 | struct cifsInodeInfo *pCifsInode; |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame^] | 140 | struct cifs_sb_info *cifs_sb = CIFS_SB(mnt->mnt_sb); |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 141 | |
| 142 | pCifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); |
| 143 | |
| 144 | if (pCifsFile == NULL) |
| 145 | return; |
| 146 | |
| 147 | if (oplockEnabled) |
| 148 | oplock = REQ_OPLOCK; |
| 149 | |
| 150 | pCifsFile->netfid = fileHandle; |
| 151 | pCifsFile->pid = current->tgid; |
Jeff Layton | 48541bd | 2009-09-12 11:54:29 -0400 | [diff] [blame] | 152 | pCifsFile->pInode = igrab(newinode); |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame^] | 153 | pCifsFile->mnt = mnt; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 154 | pCifsFile->invalidHandle = false; |
Steve French | bc8cd43 | 2009-04-12 18:18:40 +0000 | [diff] [blame] | 155 | pCifsFile->closePend = false; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 156 | mutex_init(&pCifsFile->fh_mutex); |
| 157 | mutex_init(&pCifsFile->lock_mutex); |
| 158 | INIT_LIST_HEAD(&pCifsFile->llist); |
Dave Kleikamp | 6ab409b | 2009-08-31 11:07:12 -0400 | [diff] [blame] | 159 | atomic_set(&pCifsFile->count, 1); |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame^] | 160 | slow_work_init(&pCifsFile->oplock_break, &cifs_oplock_break_ops); |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 161 | |
| 162 | /* set the following in open now |
| 163 | pCifsFile->pfile = file; */ |
| 164 | write_lock(&GlobalSMBSeslock); |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame^] | 165 | list_add(&pCifsFile->tlist, &cifs_sb->tcon->openFileList); |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 166 | pCifsInode = CIFS_I(newinode); |
| 167 | if (pCifsInode) { |
| 168 | /* if readable file instance put first in list*/ |
Steve French | bc8cd43 | 2009-04-12 18:18:40 +0000 | [diff] [blame] | 169 | if (write_only) |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 170 | list_add_tail(&pCifsFile->flist, |
| 171 | &pCifsInode->openFileList); |
Steve French | bc8cd43 | 2009-04-12 18:18:40 +0000 | [diff] [blame] | 172 | else |
| 173 | list_add(&pCifsFile->flist, &pCifsInode->openFileList); |
| 174 | |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 175 | if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) { |
| 176 | pCifsInode->clientCanCacheAll = true; |
| 177 | pCifsInode->clientCanCacheRead = true; |
Steve French | bc8cd43 | 2009-04-12 18:18:40 +0000 | [diff] [blame] | 178 | cFYI(1, ("Exclusive Oplock inode %p", newinode)); |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 179 | } else if ((oplock & 0xF) == OPLOCK_READ) |
Steve French | bc8cd43 | 2009-04-12 18:18:40 +0000 | [diff] [blame] | 180 | pCifsInode->clientCanCacheRead = true; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 181 | } |
| 182 | write_unlock(&GlobalSMBSeslock); |
| 183 | } |
| 184 | |
Steve French | 7fc8f4e | 2009-02-23 20:43:11 +0000 | [diff] [blame] | 185 | int cifs_posix_open(char *full_path, struct inode **pinode, |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame^] | 186 | struct vfsmount *mnt, int mode, int oflags, |
Jeff Layton | 590a3fe | 2009-09-12 11:54:28 -0400 | [diff] [blame] | 187 | __u32 *poplock, __u16 *pnetfid, int xid) |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 188 | { |
| 189 | int rc; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 190 | bool write_only = false; |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 191 | FILE_UNIX_BASIC_INFO *presp_data; |
| 192 | __u32 posix_flags = 0; |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame^] | 193 | struct cifs_sb_info *cifs_sb = CIFS_SB(mnt->mnt_sb); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 194 | struct cifs_fattr fattr; |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 195 | |
| 196 | cFYI(1, ("posix open %s", full_path)); |
| 197 | |
| 198 | presp_data = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
| 199 | if (presp_data == NULL) |
| 200 | return -ENOMEM; |
| 201 | |
| 202 | /* So far cifs posix extensions can only map the following flags. |
| 203 | There are other valid fmode oflags such as FMODE_LSEEK, FMODE_PREAD, but |
| 204 | so far we do not seem to need them, and we can treat them as local only */ |
| 205 | if ((oflags & (FMODE_READ | FMODE_WRITE)) == |
| 206 | (FMODE_READ | FMODE_WRITE)) |
| 207 | posix_flags = SMB_O_RDWR; |
| 208 | else if (oflags & FMODE_READ) |
| 209 | posix_flags = SMB_O_RDONLY; |
| 210 | else if (oflags & FMODE_WRITE) |
| 211 | posix_flags = SMB_O_WRONLY; |
| 212 | if (oflags & O_CREAT) |
| 213 | posix_flags |= SMB_O_CREAT; |
| 214 | if (oflags & O_EXCL) |
| 215 | posix_flags |= SMB_O_EXCL; |
| 216 | if (oflags & O_TRUNC) |
| 217 | posix_flags |= SMB_O_TRUNC; |
| 218 | if (oflags & O_APPEND) |
| 219 | posix_flags |= SMB_O_APPEND; |
| 220 | if (oflags & O_SYNC) |
| 221 | posix_flags |= SMB_O_SYNC; |
| 222 | if (oflags & O_DIRECTORY) |
| 223 | posix_flags |= SMB_O_DIRECTORY; |
| 224 | if (oflags & O_NOFOLLOW) |
| 225 | posix_flags |= SMB_O_NOFOLLOW; |
| 226 | if (oflags & O_DIRECT) |
| 227 | posix_flags |= SMB_O_DIRECT; |
| 228 | |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 229 | if (!(oflags & FMODE_READ)) |
| 230 | write_only = true; |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 231 | |
Steve French | 703a3b8 | 2009-05-21 22:21:53 +0000 | [diff] [blame] | 232 | mode &= ~current_umask(); |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 233 | rc = CIFSPOSIXCreate(xid, cifs_sb->tcon, posix_flags, mode, |
Jeff Layton | 590a3fe | 2009-09-12 11:54:28 -0400 | [diff] [blame] | 234 | pnetfid, presp_data, poplock, full_path, |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 235 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
| 236 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 237 | if (rc) |
| 238 | goto posix_open_ret; |
| 239 | |
| 240 | if (presp_data->Type == cpu_to_le32(-1)) |
| 241 | goto posix_open_ret; /* open ok, caller does qpathinfo */ |
| 242 | |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 243 | if (!pinode) |
| 244 | goto posix_open_ret; /* caller does not need info */ |
| 245 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 246 | cifs_unix_basic_to_fattr(&fattr, presp_data, cifs_sb); |
| 247 | |
| 248 | /* get new inode and set it up */ |
Steve French | 85a6dac | 2009-04-01 05:22:00 +0000 | [diff] [blame] | 249 | if (*pinode == NULL) { |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame^] | 250 | *pinode = cifs_iget(mnt->mnt_sb, &fattr); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 251 | if (!*pinode) { |
| 252 | rc = -ENOMEM; |
| 253 | goto posix_open_ret; |
| 254 | } |
| 255 | } else { |
| 256 | cifs_fattr_to_inode(*pinode, &fattr); |
Steve French | 85a6dac | 2009-04-01 05:22:00 +0000 | [diff] [blame] | 257 | } |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 258 | |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame^] | 259 | cifs_fill_fileinfo(*pinode, *pnetfid, mnt, write_only); |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 260 | |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 261 | posix_open_ret: |
| 262 | kfree(presp_data); |
| 263 | return rc; |
| 264 | } |
| 265 | |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 266 | static void setup_cifs_dentry(struct cifsTconInfo *tcon, |
| 267 | struct dentry *direntry, |
| 268 | struct inode *newinode) |
| 269 | { |
| 270 | if (tcon->nocase) |
| 271 | direntry->d_op = &cifs_ci_dentry_ops; |
| 272 | else |
| 273 | direntry->d_op = &cifs_dentry_ops; |
| 274 | d_instantiate(direntry, newinode); |
| 275 | } |
| 276 | |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 277 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | |
| 279 | int |
| 280 | cifs_create(struct inode *inode, struct dentry *direntry, int mode, |
| 281 | struct nameidata *nd) |
| 282 | { |
| 283 | int rc = -ENOENT; |
| 284 | int xid; |
Jeff Layton | 67750fb | 2008-05-09 22:28:02 +0000 | [diff] [blame] | 285 | int create_options = CREATE_NOT_DIR; |
Jeff Layton | 590a3fe | 2009-09-12 11:54:28 -0400 | [diff] [blame] | 286 | __u32 oplock = 0; |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 287 | int oflags; |
Steve French | 90e4ee5 | 2009-05-08 03:04:30 +0000 | [diff] [blame] | 288 | bool posix_create = false; |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 289 | /* |
| 290 | * BB below access is probably too much for mknod to request |
| 291 | * but we have to do query and setpathinfo so requesting |
| 292 | * less could fail (unless we want to request getatr and setatr |
| 293 | * permissions (only). At least for POSIX we do not have to |
| 294 | * request so much. |
| 295 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | int desiredAccess = GENERIC_READ | GENERIC_WRITE; |
| 297 | __u16 fileHandle; |
| 298 | struct cifs_sb_info *cifs_sb; |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 299 | struct cifsTconInfo *tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | char *full_path = NULL; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 301 | FILE_ALL_INFO *buf = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | struct inode *newinode = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | int disposition = FILE_OVERWRITE_IF; |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 304 | bool write_only = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | xid = GetXid(); |
| 307 | |
| 308 | cifs_sb = CIFS_SB(inode->i_sb); |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 309 | tcon = cifs_sb->tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | full_path = build_path_from_dentry(direntry); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 312 | if (full_path == NULL) { |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 313 | rc = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | FreeXid(xid); |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 315 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | } |
| 317 | |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 318 | if (oplockEnabled) |
| 319 | oplock = REQ_OPLOCK; |
| 320 | |
| 321 | if (nd && (nd->flags & LOOKUP_OPEN)) |
| 322 | oflags = nd->intent.open.flags; |
| 323 | else |
| 324 | oflags = FMODE_READ; |
| 325 | |
| 326 | if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && |
| 327 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
| 328 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame^] | 329 | rc = cifs_posix_open(full_path, &newinode, nd->path.mnt, |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 330 | mode, oflags, &oplock, &fileHandle, xid); |
| 331 | /* EIO could indicate that (posix open) operation is not |
| 332 | supported, despite what server claimed in capability |
| 333 | negotation. EREMOTE indicates DFS junction, which is not |
| 334 | handled in posix open */ |
| 335 | |
Steve French | 90e4ee5 | 2009-05-08 03:04:30 +0000 | [diff] [blame] | 336 | if (rc == 0) { |
| 337 | posix_create = true; |
| 338 | if (newinode == NULL) /* query inode info */ |
| 339 | goto cifs_create_get_file_info; |
| 340 | else /* success, no need to query */ |
| 341 | goto cifs_create_set_dentry; |
| 342 | } else if ((rc != -EIO) && (rc != -EREMOTE) && |
Steve French | 703a3b8 | 2009-05-21 22:21:53 +0000 | [diff] [blame] | 343 | (rc != -EOPNOTSUPP) && (rc != -EINVAL)) |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 344 | goto cifs_create_out; |
| 345 | /* else fallthrough to retry, using older open call, this is |
| 346 | case where server does not support this SMB level, and |
| 347 | falsely claims capability (also get here for DFS case |
| 348 | which should be rare for path not covered on files) */ |
| 349 | } |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 350 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 351 | if (nd && (nd->flags & LOOKUP_OPEN)) { |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 352 | /* if the file is going to stay open, then we |
| 353 | need to set the desired access properly */ |
Miklos Szeredi | e08fc04 | 2005-09-06 15:18:26 -0700 | [diff] [blame] | 354 | desiredAccess = 0; |
| 355 | if (oflags & FMODE_READ) |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 356 | desiredAccess |= GENERIC_READ; /* is this too little? */ |
Miklos Szeredi | e08fc04 | 2005-09-06 15:18:26 -0700 | [diff] [blame] | 357 | if (oflags & FMODE_WRITE) { |
| 358 | desiredAccess |= GENERIC_WRITE; |
| 359 | if (!(oflags & FMODE_READ)) |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 360 | write_only = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | } |
| 362 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 363 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | disposition = FILE_CREATE; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 365 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | disposition = FILE_OVERWRITE_IF; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 367 | else if ((oflags & O_CREAT) == O_CREAT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | disposition = FILE_OPEN_IF; |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 369 | else |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 370 | cFYI(1, ("Create flag not set in create function")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | } |
| 372 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 373 | /* BB add processing to set equivalent of mode - e.g. via CreateX with |
| 374 | ACLs */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 376 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
| 377 | if (buf == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | kfree(full_path); |
| 379 | FreeXid(xid); |
| 380 | return -ENOMEM; |
| 381 | } |
Jeff Layton | 67750fb | 2008-05-09 22:28:02 +0000 | [diff] [blame] | 382 | |
Jeff Layton | 67750fb | 2008-05-09 22:28:02 +0000 | [diff] [blame] | 383 | /* |
| 384 | * if we're not using unix extensions, see if we need to set |
| 385 | * ATTR_READONLY on the create call |
| 386 | */ |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 387 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
Jeff Layton | 67750fb | 2008-05-09 22:28:02 +0000 | [diff] [blame] | 388 | create_options |= CREATE_OPTION_READONLY; |
| 389 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 390 | if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS) |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 391 | rc = CIFSSMBOpen(xid, tcon, full_path, disposition, |
Jeff Layton | 67750fb | 2008-05-09 22:28:02 +0000 | [diff] [blame] | 392 | desiredAccess, create_options, |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 393 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
| 394 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 395 | else |
| 396 | rc = -EIO; /* no NT SMB support fall into legacy open below */ |
| 397 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 398 | if (rc == -EIO) { |
Steve French | a9d02ad | 2005-08-24 23:06:05 -0700 | [diff] [blame] | 399 | /* old server, retry the open legacy style */ |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 400 | rc = SMBLegacyOpen(xid, tcon, full_path, disposition, |
Jeff Layton | 67750fb | 2008-05-09 22:28:02 +0000 | [diff] [blame] | 401 | desiredAccess, create_options, |
Steve French | a9d02ad | 2005-08-24 23:06:05 -0700 | [diff] [blame] | 402 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
| 403 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 404 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | if (rc) { |
Steve French | 26a21b9 | 2006-05-31 18:05:34 +0000 | [diff] [blame] | 406 | cFYI(1, ("cifs_create returned 0x%x", rc)); |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 407 | goto cifs_create_out; |
| 408 | } |
| 409 | |
| 410 | /* If Open reported that we actually created a file |
| 411 | then we now have to set the mode if possible */ |
| 412 | if ((tcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) { |
| 413 | struct cifs_unix_set_info_args args = { |
Jeff Layton | 4e1e7fb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 414 | .mode = mode, |
| 415 | .ctime = NO_CHANGE_64, |
| 416 | .atime = NO_CHANGE_64, |
| 417 | .mtime = NO_CHANGE_64, |
| 418 | .device = 0, |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 419 | }; |
Jeff Layton | 4e1e7fb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 420 | |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 421 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
| 422 | args.uid = (__u64) current_fsuid(); |
| 423 | if (inode->i_mode & S_ISGID) |
| 424 | args.gid = (__u64) inode->i_gid; |
| 425 | else |
| 426 | args.gid = (__u64) current_fsgid(); |
Steve French | 3ce53fc | 2007-06-08 14:55:14 +0000 | [diff] [blame] | 427 | } else { |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 428 | args.uid = NO_CHANGE_64; |
| 429 | args.gid = NO_CHANGE_64; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | } |
Jeff Layton | 01ea95e | 2009-07-09 20:02:49 -0400 | [diff] [blame] | 431 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, |
| 432 | cifs_sb->local_nls, |
| 433 | cifs_sb->mnt_cifs_flags & |
| 434 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 435 | } else { |
| 436 | /* BB implement mode setting via Windows security |
| 437 | descriptors e.g. */ |
| 438 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 440 | /* Could set r/o dos attribute if mode & 0222 == 0 */ |
| 441 | } |
| 442 | |
| 443 | cifs_create_get_file_info: |
| 444 | /* server might mask mode so we have to query for it */ |
| 445 | if (tcon->unix_ext) |
| 446 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
| 447 | inode->i_sb, xid); |
| 448 | else { |
| 449 | rc = cifs_get_inode_info(&newinode, full_path, buf, |
| 450 | inode->i_sb, xid, &fileHandle); |
| 451 | if (newinode) { |
| 452 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
| 453 | newinode->i_mode = mode; |
| 454 | if ((oplock & CIFS_CREATE_ACTION) && |
| 455 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { |
| 456 | newinode->i_uid = current_fsuid(); |
| 457 | if (inode->i_mode & S_ISGID) |
| 458 | newinode->i_gid = inode->i_gid; |
| 459 | else |
| 460 | newinode->i_gid = current_fsgid(); |
Steve French | 6473a55 | 2005-11-29 20:20:10 -0800 | [diff] [blame] | 461 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | } |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 463 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 465 | cifs_create_set_dentry: |
| 466 | if (rc == 0) |
| 467 | setup_cifs_dentry(tcon, direntry, newinode); |
| 468 | else |
| 469 | cFYI(1, ("Create worked, get_inode_info failed rc = %d", rc)); |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 470 | |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 471 | /* nfsd case - nfs srv does not set nd */ |
| 472 | if ((nd == NULL) || (!(nd->flags & LOOKUP_OPEN))) { |
| 473 | /* mknod case - do not leave file open */ |
| 474 | CIFSSMBClose(xid, tcon, fileHandle); |
Steve French | 90e4ee5 | 2009-05-08 03:04:30 +0000 | [diff] [blame] | 475 | } else if (!(posix_create) && (newinode)) { |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame^] | 476 | cifs_fill_fileinfo(newinode, fileHandle, nd->path.mnt, |
| 477 | write_only); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 478 | } |
Steve French | d14537f1 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 479 | cifs_create_out: |
| 480 | kfree(buf); |
| 481 | kfree(full_path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | FreeXid(xid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | return rc; |
| 484 | } |
| 485 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 486 | int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, |
| 487 | dev_t device_number) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | { |
| 489 | int rc = -EPERM; |
| 490 | int xid; |
| 491 | struct cifs_sb_info *cifs_sb; |
| 492 | struct cifsTconInfo *pTcon; |
| 493 | char *full_path = NULL; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 494 | struct inode *newinode = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | |
| 496 | if (!old_valid_dev(device_number)) |
| 497 | return -EINVAL; |
| 498 | |
| 499 | xid = GetXid(); |
| 500 | |
| 501 | cifs_sb = CIFS_SB(inode->i_sb); |
| 502 | pTcon = cifs_sb->tcon; |
| 503 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | full_path = build_path_from_dentry(direntry); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 505 | if (full_path == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | rc = -ENOMEM; |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 507 | else if (pTcon->unix_ext) { |
Jeff Layton | 4e1e7fb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 508 | struct cifs_unix_set_info_args args = { |
Al Viro | ce3b0f8 | 2009-03-29 19:08:22 -0400 | [diff] [blame] | 509 | .mode = mode & ~current_umask(), |
Jeff Layton | 4e1e7fb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 510 | .ctime = NO_CHANGE_64, |
| 511 | .atime = NO_CHANGE_64, |
| 512 | .mtime = NO_CHANGE_64, |
| 513 | .device = device_number, |
| 514 | }; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 515 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
David Howells | a001e5b | 2008-11-14 10:38:47 +1100 | [diff] [blame] | 516 | args.uid = (__u64) current_fsuid(); |
| 517 | args.gid = (__u64) current_fsgid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | } else { |
Jeff Layton | 4e1e7fb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 519 | args.uid = NO_CHANGE_64; |
| 520 | args.gid = NO_CHANGE_64; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | } |
Jeff Layton | 01ea95e | 2009-07-09 20:02:49 -0400 | [diff] [blame] | 522 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
| 523 | cifs_sb->local_nls, |
| 524 | cifs_sb->mnt_cifs_flags & |
| 525 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 527 | if (!rc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 529 | inode->i_sb, xid); |
Steve French | b92327f | 2005-08-22 20:09:43 -0700 | [diff] [blame] | 530 | if (pTcon->nocase) |
| 531 | direntry->d_op = &cifs_ci_dentry_ops; |
| 532 | else |
| 533 | direntry->d_op = &cifs_dentry_ops; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 534 | if (rc == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | d_instantiate(direntry, newinode); |
| 536 | } |
Steve French | d7245c2 | 2005-07-14 18:25:12 -0500 | [diff] [blame] | 537 | } else { |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 538 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
Steve French | eda3c029 | 2005-07-21 15:20:28 -0700 | [diff] [blame] | 539 | int oplock = 0; |
| 540 | u16 fileHandle; |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 541 | FILE_ALL_INFO *buf; |
Steve French | d7245c2 | 2005-07-14 18:25:12 -0500 | [diff] [blame] | 542 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 543 | cFYI(1, ("sfu compat create special file")); |
Steve French | d7245c2 | 2005-07-14 18:25:12 -0500 | [diff] [blame] | 544 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 545 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
| 546 | if (buf == NULL) { |
Steve French | eda3c029 | 2005-07-21 15:20:28 -0700 | [diff] [blame] | 547 | kfree(full_path); |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 548 | rc = -ENOMEM; |
Steve French | eda3c029 | 2005-07-21 15:20:28 -0700 | [diff] [blame] | 549 | FreeXid(xid); |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 550 | return rc; |
Steve French | eda3c029 | 2005-07-21 15:20:28 -0700 | [diff] [blame] | 551 | } |
| 552 | |
| 553 | rc = CIFSSMBOpen(xid, pTcon, full_path, |
| 554 | FILE_CREATE, /* fail if exists */ |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 555 | GENERIC_WRITE /* BB would |
Steve French | eda3c029 | 2005-07-21 15:20:28 -0700 | [diff] [blame] | 556 | WRITE_OWNER | WRITE_DAC be better? */, |
| 557 | /* Create a file and set the |
| 558 | file attribute to SYSTEM */ |
| 559 | CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, |
| 560 | &fileHandle, &oplock, buf, |
| 561 | cifs_sb->local_nls, |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 562 | cifs_sb->mnt_cifs_flags & |
Steve French | eda3c029 | 2005-07-21 15:20:28 -0700 | [diff] [blame] | 563 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 564 | |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 565 | /* BB FIXME - add handling for backlevel servers |
| 566 | which need legacy open and check for all |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 567 | calls to SMBOpen for fallback to SMBLeagcyOpen */ |
| 568 | if (!rc) { |
Steve French | eda3c029 | 2005-07-21 15:20:28 -0700 | [diff] [blame] | 569 | /* BB Do not bother to decode buf since no |
Steve French | 86c96b4 | 2005-11-18 20:25:31 -0800 | [diff] [blame] | 570 | local inode yet to put timestamps in, |
| 571 | but we can reuse it safely */ |
Steve French | 77159b4 | 2007-08-31 01:10:17 +0000 | [diff] [blame] | 572 | unsigned int bytes_written; |
Steve French | 86c96b4 | 2005-11-18 20:25:31 -0800 | [diff] [blame] | 573 | struct win_dev *pdev; |
| 574 | pdev = (struct win_dev *)buf; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 575 | if (S_ISCHR(mode)) { |
Steve French | 86c96b4 | 2005-11-18 20:25:31 -0800 | [diff] [blame] | 576 | memcpy(pdev->type, "IntxCHR", 8); |
| 577 | pdev->major = |
| 578 | cpu_to_le64(MAJOR(device_number)); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 579 | pdev->minor = |
Steve French | 86c96b4 | 2005-11-18 20:25:31 -0800 | [diff] [blame] | 580 | cpu_to_le64(MINOR(device_number)); |
| 581 | rc = CIFSSMBWrite(xid, pTcon, |
| 582 | fileHandle, |
| 583 | sizeof(struct win_dev), |
| 584 | 0, &bytes_written, (char *)pdev, |
| 585 | NULL, 0); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 586 | } else if (S_ISBLK(mode)) { |
Steve French | 86c96b4 | 2005-11-18 20:25:31 -0800 | [diff] [blame] | 587 | memcpy(pdev->type, "IntxBLK", 8); |
| 588 | pdev->major = |
| 589 | cpu_to_le64(MAJOR(device_number)); |
| 590 | pdev->minor = |
| 591 | cpu_to_le64(MINOR(device_number)); |
| 592 | rc = CIFSSMBWrite(xid, pTcon, |
| 593 | fileHandle, |
| 594 | sizeof(struct win_dev), |
| 595 | 0, &bytes_written, (char *)pdev, |
| 596 | NULL, 0); |
| 597 | } /* else if(S_ISFIFO */ |
Steve French | eda3c029 | 2005-07-21 15:20:28 -0700 | [diff] [blame] | 598 | CIFSSMBClose(xid, pTcon, fileHandle); |
| 599 | d_drop(direntry); |
| 600 | } |
| 601 | kfree(buf); |
Steve French | d7245c2 | 2005-07-14 18:25:12 -0500 | [diff] [blame] | 602 | /* add code here to set EAs */ |
| 603 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | } |
| 605 | |
Steve French | d14537f1 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 606 | kfree(full_path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | FreeXid(xid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | return rc; |
| 609 | } |
| 610 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | struct dentry * |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 612 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
| 613 | struct nameidata *nd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | { |
| 615 | int xid; |
| 616 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ |
Jeff Layton | 590a3fe | 2009-09-12 11:54:28 -0400 | [diff] [blame] | 617 | __u32 oplock = 0; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 618 | __u16 fileHandle = 0; |
| 619 | bool posix_open = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | struct cifs_sb_info *cifs_sb; |
| 621 | struct cifsTconInfo *pTcon; |
| 622 | struct inode *newInode = NULL; |
| 623 | char *full_path = NULL; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 624 | struct file *filp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | |
| 626 | xid = GetXid(); |
| 627 | |
Steve French | 61e7480 | 2008-12-03 00:57:54 +0000 | [diff] [blame] | 628 | cFYI(1, ("parent inode = 0x%p name is: %s and dentry = 0x%p", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | parent_dir_inode, direntry->d_name.name, direntry)); |
| 630 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | /* check whether path exists */ |
| 632 | |
| 633 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); |
| 634 | pTcon = cifs_sb->tcon; |
| 635 | |
Steve French | 296034f | 2006-04-21 18:18:37 +0000 | [diff] [blame] | 636 | /* |
| 637 | * Don't allow the separator character in a path component. |
| 638 | * The VFS will not allow "/", but "\" is allowed by posix. |
| 639 | */ |
| 640 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { |
| 641 | int i; |
| 642 | for (i = 0; i < direntry->d_name.len; i++) |
| 643 | if (direntry->d_name.name[i] == '\\') { |
| 644 | cFYI(1, ("Invalid file name")); |
| 645 | FreeXid(xid); |
| 646 | return ERR_PTR(-EINVAL); |
| 647 | } |
| 648 | } |
| 649 | |
Jeff Layton | 5ddf1e0 | 2009-07-05 11:01:02 -0400 | [diff] [blame] | 650 | /* |
| 651 | * O_EXCL: optimize away the lookup, but don't hash the dentry. Let |
| 652 | * the VFS handle the create. |
| 653 | */ |
| 654 | if (nd->flags & LOOKUP_EXCL) { |
| 655 | d_instantiate(direntry, NULL); |
| 656 | return 0; |
| 657 | } |
| 658 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | /* can not grab the rename sem here since it would |
| 660 | deadlock in the cases (beginning of sys_rename itself) |
| 661 | in which we already have the sb rename sem */ |
| 662 | full_path = build_path_from_dentry(direntry); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 663 | if (full_path == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | FreeXid(xid); |
| 665 | return ERR_PTR(-ENOMEM); |
| 666 | } |
| 667 | |
| 668 | if (direntry->d_inode != NULL) { |
Steve French | 61e7480 | 2008-12-03 00:57:54 +0000 | [diff] [blame] | 669 | cFYI(1, ("non-NULL inode in lookup")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | } else { |
Steve French | 61e7480 | 2008-12-03 00:57:54 +0000 | [diff] [blame] | 671 | cFYI(1, ("NULL inode in lookup")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | } |
Steve French | 61e7480 | 2008-12-03 00:57:54 +0000 | [diff] [blame] | 673 | cFYI(1, ("Full path: %s inode = 0x%p", full_path, direntry->d_inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | |
Steve French | 8db14ca | 2009-05-23 18:57:25 +0000 | [diff] [blame] | 675 | /* Posix open is only called (at lookup time) for file create now. |
| 676 | * For opens (rather than creates), because we do not know if it |
| 677 | * is a file or directory yet, and current Samba no longer allows |
| 678 | * us to do posix open on dirs, we could end up wasting an open call |
| 679 | * on what turns out to be a dir. For file opens, we wait to call posix |
| 680 | * open till cifs_open. It could be added here (lookup) in the future |
| 681 | * but the performance tradeoff of the extra network request when EISDIR |
| 682 | * or EACCES is returned would have to be weighed against the 50% |
| 683 | * reduction in network traffic in the other paths. |
| 684 | */ |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 685 | if (pTcon->unix_ext) { |
| 686 | if (!(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY)) && |
Steve French | 8db14ca | 2009-05-23 18:57:25 +0000 | [diff] [blame] | 687 | (nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open && |
| 688 | (nd->intent.open.flags & O_CREAT)) { |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame^] | 689 | rc = cifs_posix_open(full_path, &newInode, nd->path.mnt, |
Steve French | 703a3b8 | 2009-05-21 22:21:53 +0000 | [diff] [blame] | 690 | nd->intent.open.create_mode, |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 691 | nd->intent.open.flags, &oplock, |
| 692 | &fileHandle, xid); |
Steve French | 8db14ca | 2009-05-23 18:57:25 +0000 | [diff] [blame] | 693 | /* |
| 694 | * The check below works around a bug in POSIX |
| 695 | * open in samba versions 3.3.1 and earlier where |
| 696 | * open could incorrectly fail with invalid parameter. |
| 697 | * If either that or op not supported returned, follow |
| 698 | * the normal lookup. |
| 699 | */ |
| 700 | if ((rc == 0) || (rc == -ENOENT)) |
| 701 | posix_open = true; |
| 702 | else if ((rc == -EINVAL) || (rc != -EOPNOTSUPP)) |
| 703 | pTcon->broken_posix_open = true; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 704 | } |
| 705 | if (!posix_open) |
| 706 | rc = cifs_get_inode_info_unix(&newInode, full_path, |
| 707 | parent_dir_inode->i_sb, xid); |
| 708 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | rc = cifs_get_inode_info(&newInode, full_path, NULL, |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 710 | parent_dir_inode->i_sb, xid, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
| 712 | if ((rc == 0) && (newInode != NULL)) { |
Steve French | b92327f | 2005-08-22 20:09:43 -0700 | [diff] [blame] | 713 | if (pTcon->nocase) |
| 714 | direntry->d_op = &cifs_ci_dentry_ops; |
| 715 | else |
| 716 | direntry->d_op = &cifs_dentry_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | d_add(direntry, newInode); |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 718 | if (posix_open) |
| 719 | filp = lookup_instantiate_filp(nd, direntry, NULL); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 720 | /* since paths are not looked up by component - the parent |
Steve French | 3abb927 | 2005-11-28 08:16:13 -0800 | [diff] [blame] | 721 | directories are presumed to be good here */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | renew_parental_timestamps(direntry); |
| 723 | |
| 724 | } else if (rc == -ENOENT) { |
| 725 | rc = 0; |
Steve French | 3abb927 | 2005-11-28 08:16:13 -0800 | [diff] [blame] | 726 | direntry->d_time = jiffies; |
| 727 | if (pTcon->nocase) |
| 728 | direntry->d_op = &cifs_ci_dentry_ops; |
| 729 | else |
| 730 | direntry->d_op = &cifs_dentry_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | d_add(direntry, NULL); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 732 | /* if it was once a directory (but how can we tell?) we could do |
| 733 | shrink_dcache_parent(direntry); */ |
Steve French | ed2b917 | 2008-01-20 00:30:29 +0000 | [diff] [blame] | 734 | } else if (rc != -EACCES) { |
| 735 | cERROR(1, ("Unexpected lookup error %d", rc)); |
| 736 | /* We special case check for Access Denied - since that |
| 737 | is a common return code */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | } |
| 739 | |
Steve French | d14537f1 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 740 | kfree(full_path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | FreeXid(xid); |
| 742 | return ERR_PTR(rc); |
| 743 | } |
| 744 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | static int |
| 746 | cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) |
| 747 | { |
| 748 | int isValid = 1; |
| 749 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | if (direntry->d_inode) { |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 751 | if (cifs_revalidate(direntry)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | } else { |
Steve French | 3abb927 | 2005-11-28 08:16:13 -0800 | [diff] [blame] | 754 | cFYI(1, ("neg dentry 0x%p name = %s", |
| 755 | direntry, direntry->d_name.name)); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 756 | if (time_after(jiffies, direntry->d_time + HZ) || |
Steve French | 3abb927 | 2005-11-28 08:16:13 -0800 | [diff] [blame] | 757 | !lookupCacheEnabled) { |
| 758 | d_drop(direntry); |
| 759 | isValid = 0; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 760 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | } |
| 762 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | return isValid; |
| 764 | } |
| 765 | |
| 766 | /* static int cifs_d_delete(struct dentry *direntry) |
| 767 | { |
| 768 | int rc = 0; |
| 769 | |
| 770 | cFYI(1, ("In cifs d_delete, name = %s", direntry->d_name.name)); |
| 771 | |
| 772 | return rc; |
| 773 | } */ |
| 774 | |
Al Viro | 4fd03e8 | 2009-02-20 05:57:07 +0000 | [diff] [blame] | 775 | const struct dentry_operations cifs_dentry_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | .d_revalidate = cifs_d_revalidate, |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 777 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | }; |
Steve French | b92327f | 2005-08-22 20:09:43 -0700 | [diff] [blame] | 779 | |
| 780 | static int cifs_ci_hash(struct dentry *dentry, struct qstr *q) |
| 781 | { |
| 782 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; |
| 783 | unsigned long hash; |
| 784 | int i; |
| 785 | |
| 786 | hash = init_name_hash(); |
| 787 | for (i = 0; i < q->len; i++) |
| 788 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), |
| 789 | hash); |
| 790 | q->hash = end_name_hash(hash); |
| 791 | |
| 792 | return 0; |
| 793 | } |
| 794 | |
| 795 | static int cifs_ci_compare(struct dentry *dentry, struct qstr *a, |
| 796 | struct qstr *b) |
| 797 | { |
| 798 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; |
| 799 | |
| 800 | if ((a->len == b->len) && |
| 801 | (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) { |
| 802 | /* |
| 803 | * To preserve case, don't let an existing negative dentry's |
| 804 | * case take precedence. If a is not a negative dentry, this |
| 805 | * should have no side effects |
| 806 | */ |
Steve French | c329163 | 2008-05-15 05:41:54 +0000 | [diff] [blame] | 807 | memcpy((void *)a->name, b->name, a->len); |
Steve French | b92327f | 2005-08-22 20:09:43 -0700 | [diff] [blame] | 808 | return 0; |
| 809 | } |
| 810 | return 1; |
| 811 | } |
| 812 | |
Al Viro | 4fd03e8 | 2009-02-20 05:57:07 +0000 | [diff] [blame] | 813 | const struct dentry_operations cifs_ci_dentry_ops = { |
Steve French | b92327f | 2005-08-22 20:09:43 -0700 | [diff] [blame] | 814 | .d_revalidate = cifs_d_revalidate, |
| 815 | .d_hash = cifs_ci_hash, |
| 816 | .d_compare = cifs_ci_compare, |
| 817 | }; |