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> |
Jeff Layton | 6ca9f3b | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 28 | #include <linux/file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include "cifsfs.h" |
| 30 | #include "cifspdu.h" |
| 31 | #include "cifsglob.h" |
| 32 | #include "cifsproto.h" |
| 33 | #include "cifs_debug.h" |
| 34 | #include "cifs_fs_sb.h" |
| 35 | |
Steve French | 99ee4db | 2007-02-27 05:35:17 +0000 | [diff] [blame] | 36 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | renew_parental_timestamps(struct dentry *direntry) |
| 38 | { |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 39 | /* BB check if there is a way to get the kernel to do this or if we |
| 40 | really need this */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | do { |
| 42 | direntry->d_time = jiffies; |
| 43 | direntry = direntry->d_parent; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 44 | } while (!IS_ROOT(direntry)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | } |
| 46 | |
| 47 | /* Note: caller must free return buffer */ |
| 48 | char * |
| 49 | build_path_from_dentry(struct dentry *direntry) |
| 50 | { |
| 51 | struct dentry *temp; |
Steve French | 2fe87f0 | 2006-09-21 07:02:52 +0000 | [diff] [blame] | 52 | int namelen; |
| 53 | int pplen; |
Steve French | 646dd53 | 2008-05-15 01:50:56 +0000 | [diff] [blame] | 54 | int dfsplen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | char *full_path; |
Steve French | 8827481 | 2006-03-09 22:21:45 +0000 | [diff] [blame] | 56 | char dirsep; |
Jeff Layton | 0d424ad | 2010-09-20 16:01:35 -0700 | [diff] [blame] | 57 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
| 58 | struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 60 | if (direntry == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | return NULL; /* not much we can do if dentry is freed and |
| 62 | we need to reopen the file after it was closed implicitly |
| 63 | when the server crashed */ |
| 64 | |
Steve French | 646dd53 | 2008-05-15 01:50:56 +0000 | [diff] [blame] | 65 | dirsep = CIFS_DIR_SEP(cifs_sb); |
| 66 | pplen = cifs_sb->prepathlen; |
Jeff Layton | 0d424ad | 2010-09-20 16:01:35 -0700 | [diff] [blame] | 67 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) |
| 68 | dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); |
Steve French | 646dd53 | 2008-05-15 01:50:56 +0000 | [diff] [blame] | 69 | else |
| 70 | dfsplen = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | cifs_bp_rename_retry: |
Steve French | 646dd53 | 2008-05-15 01:50:56 +0000 | [diff] [blame] | 72 | namelen = pplen + dfsplen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | for (temp = direntry; !IS_ROOT(temp);) { |
| 74 | namelen += (1 + temp->d_name.len); |
| 75 | temp = temp->d_parent; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 76 | if (temp == NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 77 | cERROR(1, "corrupt dentry"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | return NULL; |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | full_path = kmalloc(namelen+1, GFP_KERNEL); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 83 | if (full_path == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | return full_path; |
| 85 | full_path[namelen] = 0; /* trailing null */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | for (temp = direntry; !IS_ROOT(temp);) { |
| 87 | namelen -= 1 + temp->d_name.len; |
| 88 | if (namelen < 0) { |
| 89 | break; |
| 90 | } else { |
Steve French | 7f57356 | 2005-08-30 11:32:14 -0700 | [diff] [blame] | 91 | full_path[namelen] = dirsep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | strncpy(full_path + namelen + 1, temp->d_name.name, |
| 93 | temp->d_name.len); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 94 | cFYI(0, "name: %s", full_path + namelen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | } |
| 96 | temp = temp->d_parent; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 97 | if (temp == NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 98 | cERROR(1, "corrupt dentry"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | kfree(full_path); |
| 100 | return NULL; |
| 101 | } |
| 102 | } |
Steve French | 646dd53 | 2008-05-15 01:50:56 +0000 | [diff] [blame] | 103 | if (namelen != pplen + dfsplen) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 104 | cERROR(1, "did not end path lookup where expected namelen is %d", |
| 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) { |
Jeff Layton | 0d424ad | 2010-09-20 16:01:35 -0700 | [diff] [blame] | 120 | strncpy(full_path, tcon->treeName, dfsplen); |
Steve French | 646dd53 | 2008-05-15 01:50:56 +0000 | [diff] [blame] | 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 | |
Jeff Layton | 086f68b | 2009-09-21 14:08:18 -0400 | [diff] [blame] | 133 | struct cifsFileInfo * |
Jeff Layton | f7a4068 | 2010-09-20 16:01:36 -0700 | [diff] [blame] | 134 | cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle, struct file *file, |
| 135 | struct vfsmount *mnt, struct cifsTconInfo *tcon, |
| 136 | unsigned int oflags, __u32 oplock) |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 137 | { |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 138 | struct cifsFileInfo *pCifsFile; |
| 139 | struct cifsInodeInfo *pCifsInode; |
| 140 | |
| 141 | pCifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 142 | if (pCifsFile == NULL) |
Jeff Layton | 086f68b | 2009-09-21 14:08:18 -0400 | [diff] [blame] | 143 | return pCifsFile; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 144 | |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 145 | pCifsFile->netfid = fileHandle; |
| 146 | pCifsFile->pid = current->tgid; |
Jeff Layton | 48541bd | 2009-09-12 11:54:29 -0400 | [diff] [blame] | 147 | pCifsFile->pInode = igrab(newinode); |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame] | 148 | pCifsFile->mnt = mnt; |
Jeff Layton | 086f68b | 2009-09-21 14:08:18 -0400 | [diff] [blame] | 149 | pCifsFile->pfile = file; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 150 | pCifsFile->invalidHandle = false; |
Steve French | bc8cd43 | 2009-04-12 18:18:40 +0000 | [diff] [blame] | 151 | pCifsFile->closePend = false; |
Jeff Layton | f7a4068 | 2010-09-20 16:01:36 -0700 | [diff] [blame] | 152 | pCifsFile->tcon = tcon; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 153 | mutex_init(&pCifsFile->fh_mutex); |
| 154 | mutex_init(&pCifsFile->lock_mutex); |
| 155 | INIT_LIST_HEAD(&pCifsFile->llist); |
Dave Kleikamp | 6ab409b | 2009-08-31 11:07:12 -0400 | [diff] [blame] | 156 | atomic_set(&pCifsFile->count, 1); |
Tejun Heo | 9b64697 | 2010-07-20 22:09:02 +0200 | [diff] [blame] | 157 | INIT_WORK(&pCifsFile->oplock_break, cifs_oplock_break); |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 158 | |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 159 | write_lock(&GlobalSMBSeslock); |
Jeff Layton | f7a4068 | 2010-09-20 16:01:36 -0700 | [diff] [blame] | 160 | list_add(&pCifsFile->tlist, &tcon->openFileList); |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 161 | pCifsInode = CIFS_I(newinode); |
| 162 | if (pCifsInode) { |
| 163 | /* if readable file instance put first in list*/ |
Jeff Layton | 086f68b | 2009-09-21 14:08:18 -0400 | [diff] [blame] | 164 | if (oflags & FMODE_READ) |
| 165 | list_add(&pCifsFile->flist, &pCifsInode->openFileList); |
| 166 | else |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 167 | list_add_tail(&pCifsFile->flist, |
| 168 | &pCifsInode->openFileList); |
Steve French | bc8cd43 | 2009-04-12 18:18:40 +0000 | [diff] [blame] | 169 | |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 170 | if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) { |
| 171 | pCifsInode->clientCanCacheAll = true; |
| 172 | pCifsInode->clientCanCacheRead = true; |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 173 | cFYI(1, "Exclusive Oplock inode %p", newinode); |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 174 | } else if ((oplock & 0xF) == OPLOCK_READ) |
Steve French | bc8cd43 | 2009-04-12 18:18:40 +0000 | [diff] [blame] | 175 | pCifsInode->clientCanCacheRead = true; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 176 | } |
| 177 | write_unlock(&GlobalSMBSeslock); |
Jeff Layton | 086f68b | 2009-09-21 14:08:18 -0400 | [diff] [blame] | 178 | |
Jeff Layton | 6ca9f3b | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 179 | file->private_data = pCifsFile; |
| 180 | |
Jeff Layton | 086f68b | 2009-09-21 14:08:18 -0400 | [diff] [blame] | 181 | return pCifsFile; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 182 | } |
| 183 | |
Steve French | 7fc8f4e | 2009-02-23 20:43:11 +0000 | [diff] [blame] | 184 | int cifs_posix_open(char *full_path, struct inode **pinode, |
Jeff Layton | 2422f67 | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 185 | struct super_block *sb, int mode, int oflags, |
Steve French | fa588e0 | 2010-04-22 19:21:55 +0000 | [diff] [blame] | 186 | __u32 *poplock, __u16 *pnetfid, int xid) |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 187 | { |
| 188 | int rc; |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 189 | FILE_UNIX_BASIC_INFO *presp_data; |
| 190 | __u32 posix_flags = 0; |
Steve French | fa588e0 | 2010-04-22 19:21:55 +0000 | [diff] [blame] | 191 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 192 | struct cifs_fattr fattr; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 193 | struct tcon_link *tlink; |
| 194 | struct cifsTconInfo *tcon; |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 195 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 196 | cFYI(1, "posix open %s", full_path); |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 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; |
Christoph Hellwig | 6b2f3d1 | 2009-10-27 11:05:28 +0100 | [diff] [blame] | 218 | /* be safe and imply O_SYNC for O_DSYNC */ |
| 219 | if (oflags & O_DSYNC) |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 220 | posix_flags |= SMB_O_SYNC; |
| 221 | if (oflags & O_DIRECTORY) |
| 222 | posix_flags |= SMB_O_DIRECTORY; |
| 223 | if (oflags & O_NOFOLLOW) |
| 224 | posix_flags |= SMB_O_NOFOLLOW; |
| 225 | if (oflags & O_DIRECT) |
| 226 | posix_flags |= SMB_O_DIRECT; |
| 227 | |
Steve French | 703a3b8 | 2009-05-21 22:21:53 +0000 | [diff] [blame] | 228 | mode &= ~current_umask(); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 229 | |
| 230 | tlink = cifs_sb_tlink(cifs_sb); |
| 231 | if (IS_ERR(tlink)) { |
| 232 | rc = PTR_ERR(tlink); |
| 233 | goto posix_open_ret; |
| 234 | } |
| 235 | |
| 236 | tcon = tlink_tcon(tlink); |
Jeff Layton | f7a4068 | 2010-09-20 16:01:36 -0700 | [diff] [blame] | 237 | rc = CIFSPOSIXCreate(xid, tcon, posix_flags, mode, pnetfid, presp_data, |
| 238 | poplock, full_path, cifs_sb->local_nls, |
| 239 | cifs_sb->mnt_cifs_flags & |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 240 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 241 | cifs_put_tlink(tlink); |
| 242 | |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 243 | if (rc) |
| 244 | goto posix_open_ret; |
| 245 | |
| 246 | if (presp_data->Type == cpu_to_le32(-1)) |
| 247 | goto posix_open_ret; /* open ok, caller does qpathinfo */ |
| 248 | |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 249 | if (!pinode) |
| 250 | goto posix_open_ret; /* caller does not need info */ |
| 251 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 252 | cifs_unix_basic_to_fattr(&fattr, presp_data, cifs_sb); |
| 253 | |
| 254 | /* get new inode and set it up */ |
Steve French | 85a6dac | 2009-04-01 05:22:00 +0000 | [diff] [blame] | 255 | if (*pinode == NULL) { |
Jeff Layton | 4065c80 | 2010-05-17 07:18:58 -0400 | [diff] [blame] | 256 | cifs_fill_uniqueid(sb, &fattr); |
Steve French | fa588e0 | 2010-04-22 19:21:55 +0000 | [diff] [blame] | 257 | *pinode = cifs_iget(sb, &fattr); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 258 | if (!*pinode) { |
| 259 | rc = -ENOMEM; |
| 260 | goto posix_open_ret; |
| 261 | } |
| 262 | } else { |
| 263 | cifs_fattr_to_inode(*pinode, &fattr); |
Steve French | 85a6dac | 2009-04-01 05:22:00 +0000 | [diff] [blame] | 264 | } |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 265 | |
| 266 | posix_open_ret: |
| 267 | kfree(presp_data); |
| 268 | return rc; |
| 269 | } |
| 270 | |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 271 | static void setup_cifs_dentry(struct cifsTconInfo *tcon, |
| 272 | struct dentry *direntry, |
| 273 | struct inode *newinode) |
| 274 | { |
| 275 | if (tcon->nocase) |
| 276 | direntry->d_op = &cifs_ci_dentry_ops; |
| 277 | else |
| 278 | direntry->d_op = &cifs_dentry_ops; |
| 279 | d_instantiate(direntry, newinode); |
| 280 | } |
| 281 | |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 282 | /* 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] | 283 | |
| 284 | int |
| 285 | cifs_create(struct inode *inode, struct dentry *direntry, int mode, |
| 286 | struct nameidata *nd) |
| 287 | { |
| 288 | int rc = -ENOENT; |
| 289 | int xid; |
Jeff Layton | 67750fb | 2008-05-09 22:28:02 +0000 | [diff] [blame] | 290 | int create_options = CREATE_NOT_DIR; |
Jeff Layton | 590a3fe | 2009-09-12 11:54:28 -0400 | [diff] [blame] | 291 | __u32 oplock = 0; |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 292 | int oflags; |
| 293 | /* |
| 294 | * BB below access is probably too much for mknod to request |
| 295 | * but we have to do query and setpathinfo so requesting |
| 296 | * less could fail (unless we want to request getatr and setatr |
| 297 | * permissions (only). At least for POSIX we do not have to |
| 298 | * request so much. |
| 299 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | int desiredAccess = GENERIC_READ | GENERIC_WRITE; |
| 301 | __u16 fileHandle; |
| 302 | struct cifs_sb_info *cifs_sb; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 303 | struct tcon_link *tlink; |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 304 | struct cifsTconInfo *tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | char *full_path = NULL; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 306 | FILE_ALL_INFO *buf = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | struct inode *newinode = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | int disposition = FILE_OVERWRITE_IF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
| 310 | xid = GetXid(); |
| 311 | |
| 312 | cifs_sb = CIFS_SB(inode->i_sb); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 313 | tlink = cifs_sb_tlink(cifs_sb); |
| 314 | if (IS_ERR(tlink)) { |
| 315 | FreeXid(xid); |
| 316 | return PTR_ERR(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | } |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 318 | tcon = tlink_tcon(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 320 | if (oplockEnabled) |
| 321 | oplock = REQ_OPLOCK; |
| 322 | |
| 323 | if (nd && (nd->flags & LOOKUP_OPEN)) |
| 324 | oflags = nd->intent.open.flags; |
| 325 | else |
Steve French | fa588e0 | 2010-04-22 19:21:55 +0000 | [diff] [blame] | 326 | oflags = FMODE_READ | SMB_O_CREAT; |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 327 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 328 | full_path = build_path_from_dentry(direntry); |
| 329 | if (full_path == NULL) { |
| 330 | rc = -ENOMEM; |
| 331 | goto cifs_create_out; |
| 332 | } |
| 333 | |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 334 | if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && |
| 335 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
| 336 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
Steve French | fa588e0 | 2010-04-22 19:21:55 +0000 | [diff] [blame] | 337 | rc = cifs_posix_open(full_path, &newinode, |
Steve French | fa588e0 | 2010-04-22 19:21:55 +0000 | [diff] [blame] | 338 | inode->i_sb, mode, oflags, &oplock, &fileHandle, xid); |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 339 | /* EIO could indicate that (posix open) operation is not |
| 340 | supported, despite what server claimed in capability |
| 341 | negotation. EREMOTE indicates DFS junction, which is not |
| 342 | handled in posix open */ |
| 343 | |
Steve French | 90e4ee5 | 2009-05-08 03:04:30 +0000 | [diff] [blame] | 344 | if (rc == 0) { |
Steve French | 90e4ee5 | 2009-05-08 03:04:30 +0000 | [diff] [blame] | 345 | if (newinode == NULL) /* query inode info */ |
| 346 | goto cifs_create_get_file_info; |
| 347 | else /* success, no need to query */ |
| 348 | goto cifs_create_set_dentry; |
| 349 | } else if ((rc != -EIO) && (rc != -EREMOTE) && |
Steve French | 703a3b8 | 2009-05-21 22:21:53 +0000 | [diff] [blame] | 350 | (rc != -EOPNOTSUPP) && (rc != -EINVAL)) |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 351 | goto cifs_create_out; |
| 352 | /* else fallthrough to retry, using older open call, this is |
| 353 | case where server does not support this SMB level, and |
| 354 | falsely claims capability (also get here for DFS case |
| 355 | which should be rare for path not covered on files) */ |
| 356 | } |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 357 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 358 | if (nd && (nd->flags & LOOKUP_OPEN)) { |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 359 | /* if the file is going to stay open, then we |
| 360 | need to set the desired access properly */ |
Miklos Szeredi | e08fc04 | 2005-09-06 15:18:26 -0700 | [diff] [blame] | 361 | desiredAccess = 0; |
| 362 | if (oflags & FMODE_READ) |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 363 | desiredAccess |= GENERIC_READ; /* is this too little? */ |
Jeff Layton | 086f68b | 2009-09-21 14:08:18 -0400 | [diff] [blame] | 364 | if (oflags & FMODE_WRITE) |
Miklos Szeredi | e08fc04 | 2005-09-06 15:18:26 -0700 | [diff] [blame] | 365 | desiredAccess |= GENERIC_WRITE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 367 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | disposition = FILE_CREATE; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 369 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | disposition = FILE_OVERWRITE_IF; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 371 | else if ((oflags & O_CREAT) == O_CREAT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | disposition = FILE_OPEN_IF; |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 373 | else |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 374 | cFYI(1, "Create flag not set in create function"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | } |
| 376 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 377 | /* BB add processing to set equivalent of mode - e.g. via CreateX with |
| 378 | ACLs */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 380 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
| 381 | if (buf == NULL) { |
Jeff Layton | 232341b | 2010-08-05 13:58:38 -0400 | [diff] [blame] | 382 | rc = -ENOMEM; |
| 383 | goto cifs_create_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | } |
Jeff Layton | 67750fb | 2008-05-09 22:28:02 +0000 | [diff] [blame] | 385 | |
Jeff Layton | 67750fb | 2008-05-09 22:28:02 +0000 | [diff] [blame] | 386 | /* |
| 387 | * if we're not using unix extensions, see if we need to set |
| 388 | * ATTR_READONLY on the create call |
| 389 | */ |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 390 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
Jeff Layton | 67750fb | 2008-05-09 22:28:02 +0000 | [diff] [blame] | 391 | create_options |= CREATE_OPTION_READONLY; |
| 392 | |
Jeff Layton | a6e8a84 | 2010-09-20 16:01:33 -0700 | [diff] [blame] | 393 | if (tcon->ses->capabilities & CAP_NT_SMBS) |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 394 | rc = CIFSSMBOpen(xid, tcon, full_path, disposition, |
Jeff Layton | 67750fb | 2008-05-09 22:28:02 +0000 | [diff] [blame] | 395 | desiredAccess, create_options, |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 396 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
| 397 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 398 | else |
| 399 | rc = -EIO; /* no NT SMB support fall into legacy open below */ |
| 400 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 401 | if (rc == -EIO) { |
Steve French | a9d02ad | 2005-08-24 23:06:05 -0700 | [diff] [blame] | 402 | /* old server, retry the open legacy style */ |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 403 | rc = SMBLegacyOpen(xid, tcon, full_path, disposition, |
Jeff Layton | 67750fb | 2008-05-09 22:28:02 +0000 | [diff] [blame] | 404 | desiredAccess, create_options, |
Steve French | a9d02ad | 2005-08-24 23:06:05 -0700 | [diff] [blame] | 405 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
| 406 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 407 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | if (rc) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 409 | cFYI(1, "cifs_create returned 0x%x", rc); |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 410 | goto cifs_create_out; |
| 411 | } |
| 412 | |
| 413 | /* If Open reported that we actually created a file |
| 414 | then we now have to set the mode if possible */ |
| 415 | if ((tcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) { |
| 416 | struct cifs_unix_set_info_args args = { |
Jeff Layton | 4e1e7fb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 417 | .mode = mode, |
| 418 | .ctime = NO_CHANGE_64, |
| 419 | .atime = NO_CHANGE_64, |
| 420 | .mtime = NO_CHANGE_64, |
| 421 | .device = 0, |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 422 | }; |
Jeff Layton | 4e1e7fb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 423 | |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 424 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
| 425 | args.uid = (__u64) current_fsuid(); |
| 426 | if (inode->i_mode & S_ISGID) |
| 427 | args.gid = (__u64) inode->i_gid; |
| 428 | else |
| 429 | args.gid = (__u64) current_fsgid(); |
Steve French | 3ce53fc | 2007-06-08 14:55:14 +0000 | [diff] [blame] | 430 | } else { |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 431 | args.uid = NO_CHANGE_64; |
| 432 | args.gid = NO_CHANGE_64; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | } |
Jeff Layton | 01ea95e | 2009-07-09 20:02:49 -0400 | [diff] [blame] | 434 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, |
| 435 | cifs_sb->local_nls, |
| 436 | cifs_sb->mnt_cifs_flags & |
| 437 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 438 | } else { |
| 439 | /* BB implement mode setting via Windows security |
| 440 | descriptors e.g. */ |
| 441 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 443 | /* Could set r/o dos attribute if mode & 0222 == 0 */ |
| 444 | } |
| 445 | |
| 446 | cifs_create_get_file_info: |
| 447 | /* server might mask mode so we have to query for it */ |
| 448 | if (tcon->unix_ext) |
| 449 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
| 450 | inode->i_sb, xid); |
| 451 | else { |
| 452 | rc = cifs_get_inode_info(&newinode, full_path, buf, |
| 453 | inode->i_sb, xid, &fileHandle); |
| 454 | if (newinode) { |
| 455 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
| 456 | newinode->i_mode = mode; |
| 457 | if ((oplock & CIFS_CREATE_ACTION) && |
| 458 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { |
| 459 | newinode->i_uid = current_fsuid(); |
| 460 | if (inode->i_mode & S_ISGID) |
| 461 | newinode->i_gid = inode->i_gid; |
| 462 | else |
| 463 | newinode->i_gid = current_fsgid(); |
Steve French | 6473a55 | 2005-11-29 20:20:10 -0800 | [diff] [blame] | 464 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | } |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 466 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
Steve French | c3b2a0c | 2009-02-20 04:32:45 +0000 | [diff] [blame] | 468 | cifs_create_set_dentry: |
| 469 | if (rc == 0) |
| 470 | setup_cifs_dentry(tcon, direntry, newinode); |
| 471 | else |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 472 | cFYI(1, "Create worked, get_inode_info failed rc = %d", rc); |
Steve French | f818dd5 | 2009-01-19 02:38:35 +0000 | [diff] [blame] | 473 | |
Jeff Layton | 2422f67 | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 474 | if (newinode && nd && (nd->flags & LOOKUP_OPEN)) { |
Suresh Jayaraman | fdb3603 | 2010-05-11 09:46:46 +0530 | [diff] [blame] | 475 | struct cifsFileInfo *pfile_info; |
Jeff Layton | 6ca9f3b | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 476 | struct file *filp; |
| 477 | |
| 478 | filp = lookup_instantiate_filp(nd, direntry, generic_file_open); |
| 479 | if (IS_ERR(filp)) { |
| 480 | rc = PTR_ERR(filp); |
| 481 | CIFSSMBClose(xid, tcon, fileHandle); |
| 482 | goto cifs_create_out; |
| 483 | } |
| 484 | |
| 485 | pfile_info = cifs_new_fileinfo(newinode, fileHandle, filp, |
Jeff Layton | f7a4068 | 2010-09-20 16:01:36 -0700 | [diff] [blame] | 486 | nd->path.mnt, tcon, oflags, |
| 487 | oplock); |
Jeff Layton | 6ca9f3b | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 488 | if (pfile_info == NULL) { |
| 489 | fput(filp); |
| 490 | CIFSSMBClose(xid, tcon, fileHandle); |
Suresh Jayaraman | fdb3603 | 2010-05-11 09:46:46 +0530 | [diff] [blame] | 491 | rc = -ENOMEM; |
Jeff Layton | 6ca9f3b | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 492 | } |
Jeff Layton | 2422f67 | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 493 | } else { |
| 494 | CIFSSMBClose(xid, tcon, fileHandle); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 495 | } |
Jeff Layton | 2422f67 | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 496 | |
Steve French | d14537f1 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 497 | cifs_create_out: |
| 498 | kfree(buf); |
| 499 | kfree(full_path); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 500 | cifs_put_tlink(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | FreeXid(xid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | return rc; |
| 503 | } |
| 504 | |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 505 | int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, |
| 506 | dev_t device_number) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | { |
| 508 | int rc = -EPERM; |
| 509 | int xid; |
| 510 | struct cifs_sb_info *cifs_sb; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 511 | struct tcon_link *tlink; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | struct cifsTconInfo *pTcon; |
| 513 | char *full_path = NULL; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 514 | struct inode *newinode = NULL; |
Jeff Layton | 5d9ac7f | 2010-08-05 13:58:22 -0400 | [diff] [blame] | 515 | int oplock = 0; |
| 516 | u16 fileHandle; |
| 517 | FILE_ALL_INFO *buf = NULL; |
| 518 | unsigned int bytes_written; |
| 519 | struct win_dev *pdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | |
| 521 | if (!old_valid_dev(device_number)) |
| 522 | return -EINVAL; |
| 523 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | cifs_sb = CIFS_SB(inode->i_sb); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 525 | tlink = cifs_sb_tlink(cifs_sb); |
| 526 | if (IS_ERR(tlink)) |
| 527 | return PTR_ERR(tlink); |
| 528 | |
| 529 | pTcon = tlink_tcon(tlink); |
| 530 | |
| 531 | xid = GetXid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | full_path = build_path_from_dentry(direntry); |
Jeff Layton | 5d9ac7f | 2010-08-05 13:58:22 -0400 | [diff] [blame] | 534 | if (full_path == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | rc = -ENOMEM; |
Jeff Layton | 5d9ac7f | 2010-08-05 13:58:22 -0400 | [diff] [blame] | 536 | goto mknod_out; |
| 537 | } |
| 538 | |
| 539 | if (pTcon->unix_ext) { |
Jeff Layton | 4e1e7fb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 540 | struct cifs_unix_set_info_args args = { |
Al Viro | ce3b0f8 | 2009-03-29 19:08:22 -0400 | [diff] [blame] | 541 | .mode = mode & ~current_umask(), |
Jeff Layton | 4e1e7fb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 542 | .ctime = NO_CHANGE_64, |
| 543 | .atime = NO_CHANGE_64, |
| 544 | .mtime = NO_CHANGE_64, |
| 545 | .device = device_number, |
| 546 | }; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 547 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
David Howells | a001e5b | 2008-11-14 10:38:47 +1100 | [diff] [blame] | 548 | args.uid = (__u64) current_fsuid(); |
| 549 | args.gid = (__u64) current_fsgid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | } else { |
Jeff Layton | 4e1e7fb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 551 | args.uid = NO_CHANGE_64; |
| 552 | args.gid = NO_CHANGE_64; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | } |
Jeff Layton | 01ea95e | 2009-07-09 20:02:49 -0400 | [diff] [blame] | 554 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
| 555 | cifs_sb->local_nls, |
| 556 | cifs_sb->mnt_cifs_flags & |
| 557 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Jeff Layton | 5d9ac7f | 2010-08-05 13:58:22 -0400 | [diff] [blame] | 558 | if (rc) |
| 559 | goto mknod_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | |
Jeff Layton | 5d9ac7f | 2010-08-05 13:58:22 -0400 | [diff] [blame] | 561 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 562 | inode->i_sb, xid); |
Jeff Layton | 5d9ac7f | 2010-08-05 13:58:22 -0400 | [diff] [blame] | 563 | if (pTcon->nocase) |
| 564 | direntry->d_op = &cifs_ci_dentry_ops; |
| 565 | else |
| 566 | direntry->d_op = &cifs_dentry_ops; |
Steve French | d7245c2 | 2005-07-14 18:25:12 -0500 | [diff] [blame] | 567 | |
Jeff Layton | 5d9ac7f | 2010-08-05 13:58:22 -0400 | [diff] [blame] | 568 | if (rc == 0) |
| 569 | d_instantiate(direntry, newinode); |
| 570 | goto mknod_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | } |
| 572 | |
Jeff Layton | 5d9ac7f | 2010-08-05 13:58:22 -0400 | [diff] [blame] | 573 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) |
| 574 | goto mknod_out; |
| 575 | |
| 576 | |
| 577 | cFYI(1, "sfu compat create special file"); |
| 578 | |
| 579 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
| 580 | if (buf == NULL) { |
| 581 | kfree(full_path); |
| 582 | rc = -ENOMEM; |
| 583 | FreeXid(xid); |
| 584 | return rc; |
| 585 | } |
| 586 | |
| 587 | /* FIXME: would WRITE_OWNER | WRITE_DAC be better? */ |
| 588 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE, |
| 589 | GENERIC_WRITE, CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, |
| 590 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
| 591 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 592 | if (rc) |
| 593 | goto mknod_out; |
| 594 | |
| 595 | /* BB Do not bother to decode buf since no local inode yet to put |
| 596 | * timestamps in, but we can reuse it safely */ |
| 597 | |
| 598 | pdev = (struct win_dev *)buf; |
| 599 | if (S_ISCHR(mode)) { |
| 600 | memcpy(pdev->type, "IntxCHR", 8); |
| 601 | pdev->major = |
| 602 | cpu_to_le64(MAJOR(device_number)); |
| 603 | pdev->minor = |
| 604 | cpu_to_le64(MINOR(device_number)); |
| 605 | rc = CIFSSMBWrite(xid, pTcon, |
| 606 | fileHandle, |
| 607 | sizeof(struct win_dev), |
| 608 | 0, &bytes_written, (char *)pdev, |
| 609 | NULL, 0); |
| 610 | } else if (S_ISBLK(mode)) { |
| 611 | memcpy(pdev->type, "IntxBLK", 8); |
| 612 | pdev->major = |
| 613 | cpu_to_le64(MAJOR(device_number)); |
| 614 | pdev->minor = |
| 615 | cpu_to_le64(MINOR(device_number)); |
| 616 | rc = CIFSSMBWrite(xid, pTcon, |
| 617 | fileHandle, |
| 618 | sizeof(struct win_dev), |
| 619 | 0, &bytes_written, (char *)pdev, |
| 620 | NULL, 0); |
| 621 | } /* else if (S_ISFIFO) */ |
| 622 | CIFSSMBClose(xid, pTcon, fileHandle); |
| 623 | d_drop(direntry); |
| 624 | |
| 625 | /* FIXME: add code here to set EAs */ |
| 626 | |
| 627 | mknod_out: |
Steve French | d14537f1 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 628 | kfree(full_path); |
Jeff Layton | 5d9ac7f | 2010-08-05 13:58:22 -0400 | [diff] [blame] | 629 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | FreeXid(xid); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 631 | cifs_put_tlink(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | return rc; |
| 633 | } |
| 634 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | struct dentry * |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 636 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
| 637 | struct nameidata *nd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | { |
| 639 | int xid; |
| 640 | 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] | 641 | __u32 oplock = 0; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 642 | __u16 fileHandle = 0; |
| 643 | bool posix_open = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | struct cifs_sb_info *cifs_sb; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 645 | struct tcon_link *tlink; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | struct cifsTconInfo *pTcon; |
Jeff Layton | 2422f67 | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 647 | struct cifsFileInfo *cfile; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | struct inode *newInode = NULL; |
| 649 | char *full_path = NULL; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 650 | struct file *filp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | |
| 652 | xid = GetXid(); |
| 653 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 654 | cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p", |
| 655 | parent_dir_inode, direntry->d_name.name, direntry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | /* check whether path exists */ |
| 658 | |
| 659 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 660 | tlink = cifs_sb_tlink(cifs_sb); |
| 661 | if (IS_ERR(tlink)) { |
| 662 | FreeXid(xid); |
| 663 | return (struct dentry *)tlink; |
| 664 | } |
| 665 | pTcon = tlink_tcon(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | |
Steve French | 296034f | 2006-04-21 18:18:37 +0000 | [diff] [blame] | 667 | /* |
| 668 | * Don't allow the separator character in a path component. |
| 669 | * The VFS will not allow "/", but "\" is allowed by posix. |
| 670 | */ |
| 671 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { |
| 672 | int i; |
| 673 | for (i = 0; i < direntry->d_name.len; i++) |
| 674 | if (direntry->d_name.name[i] == '\\') { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 675 | cFYI(1, "Invalid file name"); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 676 | rc = -EINVAL; |
| 677 | goto lookup_out; |
Steve French | 296034f | 2006-04-21 18:18:37 +0000 | [diff] [blame] | 678 | } |
| 679 | } |
| 680 | |
Jeff Layton | 5ddf1e0 | 2009-07-05 11:01:02 -0400 | [diff] [blame] | 681 | /* |
| 682 | * O_EXCL: optimize away the lookup, but don't hash the dentry. Let |
| 683 | * the VFS handle the create. |
| 684 | */ |
Steve French | 8e6c033 | 2009-11-24 22:17:59 +0000 | [diff] [blame] | 685 | if (nd && (nd->flags & LOOKUP_EXCL)) { |
Jeff Layton | 5ddf1e0 | 2009-07-05 11:01:02 -0400 | [diff] [blame] | 686 | d_instantiate(direntry, NULL); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 687 | rc = 0; |
| 688 | goto lookup_out; |
Jeff Layton | 5ddf1e0 | 2009-07-05 11:01:02 -0400 | [diff] [blame] | 689 | } |
| 690 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | /* can not grab the rename sem here since it would |
| 692 | deadlock in the cases (beginning of sys_rename itself) |
| 693 | in which we already have the sb rename sem */ |
| 694 | full_path = build_path_from_dentry(direntry); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 695 | if (full_path == NULL) { |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 696 | rc = -ENOMEM; |
| 697 | goto lookup_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | } |
| 699 | |
| 700 | if (direntry->d_inode != NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 701 | cFYI(1, "non-NULL inode in lookup"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | } else { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 703 | cFYI(1, "NULL inode in lookup"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | } |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 705 | 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] | 706 | |
Steve French | 8db14ca | 2009-05-23 18:57:25 +0000 | [diff] [blame] | 707 | /* Posix open is only called (at lookup time) for file create now. |
| 708 | * For opens (rather than creates), because we do not know if it |
| 709 | * is a file or directory yet, and current Samba no longer allows |
| 710 | * us to do posix open on dirs, we could end up wasting an open call |
| 711 | * on what turns out to be a dir. For file opens, we wait to call posix |
| 712 | * open till cifs_open. It could be added here (lookup) in the future |
| 713 | * but the performance tradeoff of the extra network request when EISDIR |
| 714 | * or EACCES is returned would have to be weighed against the 50% |
| 715 | * reduction in network traffic in the other paths. |
| 716 | */ |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 717 | if (pTcon->unix_ext) { |
Steve French | 8e6c033 | 2009-11-24 22:17:59 +0000 | [diff] [blame] | 718 | if (nd && !(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY)) && |
Steve French | 8db14ca | 2009-05-23 18:57:25 +0000 | [diff] [blame] | 719 | (nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open && |
| 720 | (nd->intent.open.flags & O_CREAT)) { |
Jeff Layton | 2422f67 | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 721 | rc = cifs_posix_open(full_path, &newInode, |
Steve French | fa588e0 | 2010-04-22 19:21:55 +0000 | [diff] [blame] | 722 | parent_dir_inode->i_sb, |
Steve French | 703a3b8 | 2009-05-21 22:21:53 +0000 | [diff] [blame] | 723 | nd->intent.open.create_mode, |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 724 | nd->intent.open.flags, &oplock, |
| 725 | &fileHandle, xid); |
Steve French | 8db14ca | 2009-05-23 18:57:25 +0000 | [diff] [blame] | 726 | /* |
| 727 | * The check below works around a bug in POSIX |
| 728 | * open in samba versions 3.3.1 and earlier where |
| 729 | * open could incorrectly fail with invalid parameter. |
| 730 | * If either that or op not supported returned, follow |
| 731 | * the normal lookup. |
| 732 | */ |
| 733 | if ((rc == 0) || (rc == -ENOENT)) |
| 734 | posix_open = true; |
| 735 | else if ((rc == -EINVAL) || (rc != -EOPNOTSUPP)) |
| 736 | pTcon->broken_posix_open = true; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 737 | } |
| 738 | if (!posix_open) |
| 739 | rc = cifs_get_inode_info_unix(&newInode, full_path, |
| 740 | parent_dir_inode->i_sb, xid); |
| 741 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | rc = cifs_get_inode_info(&newInode, full_path, NULL, |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 743 | parent_dir_inode->i_sb, xid, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | |
| 745 | if ((rc == 0) && (newInode != NULL)) { |
Steve French | b92327f | 2005-08-22 20:09:43 -0700 | [diff] [blame] | 746 | if (pTcon->nocase) |
| 747 | direntry->d_op = &cifs_ci_dentry_ops; |
| 748 | else |
| 749 | direntry->d_op = &cifs_dentry_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | d_add(direntry, newInode); |
Jeff Layton | 2422f67 | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 751 | if (posix_open) { |
Jeff Layton | 6ca9f3b | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 752 | filp = lookup_instantiate_filp(nd, direntry, |
| 753 | generic_file_open); |
| 754 | if (IS_ERR(filp)) { |
| 755 | rc = PTR_ERR(filp); |
| 756 | CIFSSMBClose(xid, pTcon, fileHandle); |
| 757 | goto lookup_out; |
| 758 | } |
| 759 | |
| 760 | cfile = cifs_new_fileinfo(newInode, fileHandle, filp, |
Jeff Layton | f7a4068 | 2010-09-20 16:01:36 -0700 | [diff] [blame] | 761 | nd->path.mnt, pTcon, |
Suresh Jayaraman | aa91c7e | 2010-09-17 18:56:39 +0530 | [diff] [blame] | 762 | nd->intent.open.flags, |
| 763 | oplock); |
Jeff Layton | 2422f67 | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 764 | if (cfile == NULL) { |
Jeff Layton | 6ca9f3b | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 765 | fput(filp); |
Jeff Layton | 2422f67 | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 766 | CIFSSMBClose(xid, pTcon, fileHandle); |
| 767 | rc = -ENOMEM; |
| 768 | goto lookup_out; |
| 769 | } |
Jeff Layton | 2422f67 | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 770 | } |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 771 | /* since paths are not looked up by component - the parent |
Steve French | 3abb927 | 2005-11-28 08:16:13 -0800 | [diff] [blame] | 772 | directories are presumed to be good here */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | renew_parental_timestamps(direntry); |
| 774 | |
| 775 | } else if (rc == -ENOENT) { |
| 776 | rc = 0; |
Steve French | 3abb927 | 2005-11-28 08:16:13 -0800 | [diff] [blame] | 777 | direntry->d_time = jiffies; |
| 778 | if (pTcon->nocase) |
| 779 | direntry->d_op = &cifs_ci_dentry_ops; |
| 780 | else |
| 781 | direntry->d_op = &cifs_dentry_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | d_add(direntry, NULL); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 783 | /* if it was once a directory (but how can we tell?) we could do |
| 784 | shrink_dcache_parent(direntry); */ |
Steve French | ed2b917 | 2008-01-20 00:30:29 +0000 | [diff] [blame] | 785 | } else if (rc != -EACCES) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 786 | cERROR(1, "Unexpected lookup error %d", rc); |
Steve French | ed2b917 | 2008-01-20 00:30:29 +0000 | [diff] [blame] | 787 | /* We special case check for Access Denied - since that |
| 788 | is a common return code */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | } |
| 790 | |
Jeff Layton | 2422f67 | 2010-06-16 13:40:16 -0400 | [diff] [blame] | 791 | lookup_out: |
Steve French | d14537f1 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 792 | kfree(full_path); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame^] | 793 | cifs_put_tlink(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | FreeXid(xid); |
| 795 | return ERR_PTR(rc); |
| 796 | } |
| 797 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | static int |
| 799 | cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) |
| 800 | { |
| 801 | int isValid = 1; |
| 802 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | if (direntry->d_inode) { |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 804 | if (cifs_revalidate_dentry(direntry)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | } else { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 807 | cFYI(1, "neg dentry 0x%p name = %s", |
| 808 | direntry, direntry->d_name.name); |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 809 | if (time_after(jiffies, direntry->d_time + HZ) || |
Steve French | 3abb927 | 2005-11-28 08:16:13 -0800 | [diff] [blame] | 810 | !lookupCacheEnabled) { |
| 811 | d_drop(direntry); |
| 812 | isValid = 0; |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 813 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | } |
| 815 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | return isValid; |
| 817 | } |
| 818 | |
| 819 | /* static int cifs_d_delete(struct dentry *direntry) |
| 820 | { |
| 821 | int rc = 0; |
| 822 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 823 | cFYI(1, "In cifs d_delete, name = %s", direntry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | |
| 825 | return rc; |
| 826 | } */ |
| 827 | |
Al Viro | 4fd03e8 | 2009-02-20 05:57:07 +0000 | [diff] [blame] | 828 | const struct dentry_operations cifs_dentry_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | .d_revalidate = cifs_d_revalidate, |
Steve French | 5fdae1f | 2007-06-05 18:30:44 +0000 | [diff] [blame] | 830 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | }; |
Steve French | b92327f | 2005-08-22 20:09:43 -0700 | [diff] [blame] | 832 | |
| 833 | static int cifs_ci_hash(struct dentry *dentry, struct qstr *q) |
| 834 | { |
| 835 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; |
| 836 | unsigned long hash; |
| 837 | int i; |
| 838 | |
| 839 | hash = init_name_hash(); |
| 840 | for (i = 0; i < q->len; i++) |
| 841 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), |
| 842 | hash); |
| 843 | q->hash = end_name_hash(hash); |
| 844 | |
| 845 | return 0; |
| 846 | } |
| 847 | |
| 848 | static int cifs_ci_compare(struct dentry *dentry, struct qstr *a, |
| 849 | struct qstr *b) |
| 850 | { |
| 851 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; |
| 852 | |
| 853 | if ((a->len == b->len) && |
| 854 | (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) { |
| 855 | /* |
| 856 | * To preserve case, don't let an existing negative dentry's |
| 857 | * case take precedence. If a is not a negative dentry, this |
| 858 | * should have no side effects |
| 859 | */ |
Steve French | c329163 | 2008-05-15 05:41:54 +0000 | [diff] [blame] | 860 | memcpy((void *)a->name, b->name, a->len); |
Steve French | b92327f | 2005-08-22 20:09:43 -0700 | [diff] [blame] | 861 | return 0; |
| 862 | } |
| 863 | return 1; |
| 864 | } |
| 865 | |
Al Viro | 4fd03e8 | 2009-02-20 05:57:07 +0000 | [diff] [blame] | 866 | const struct dentry_operations cifs_ci_dentry_ops = { |
Steve French | b92327f | 2005-08-22 20:09:43 -0700 | [diff] [blame] | 867 | .d_revalidate = cifs_d_revalidate, |
| 868 | .d_hash = cifs_ci_hash, |
| 869 | .d_compare = cifs_ci_compare, |
| 870 | }; |