Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/readdir.c |
| 3 | * |
| 4 | * Directory search handling |
| 5 | * |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 6 | * Copyright (C) International Business Machines Corp., 2004, 2005 |
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/smp_lock.h> |
| 26 | #include "cifspdu.h" |
| 27 | #include "cifsglob.h" |
| 28 | #include "cifsproto.h" |
| 29 | #include "cifs_unicode.h" |
| 30 | #include "cifs_debug.h" |
| 31 | #include "cifs_fs_sb.h" |
| 32 | #include "cifsfs.h" |
| 33 | |
| 34 | /* BB fixme - add debug wrappers around this function to disable it fixme BB */ |
| 35 | /* static void dump_cifs_file_struct(struct file *file, char *label) |
| 36 | { |
| 37 | struct cifsFileInfo * cf; |
| 38 | |
| 39 | if(file) { |
| 40 | cf = file->private_data; |
| 41 | if(cf == NULL) { |
| 42 | cFYI(1,("empty cifs private file data")); |
| 43 | return; |
| 44 | } |
| 45 | if(cf->invalidHandle) { |
| 46 | cFYI(1,("invalid handle")); |
| 47 | } |
| 48 | if(cf->srch_inf.endOfSearch) { |
| 49 | cFYI(1,("end of search")); |
| 50 | } |
| 51 | if(cf->srch_inf.emptyDir) { |
| 52 | cFYI(1,("empty dir")); |
| 53 | } |
| 54 | |
| 55 | } |
| 56 | } */ |
| 57 | |
| 58 | /* Returns one if new inode created (which therefore needs to be hashed) */ |
| 59 | /* Might check in the future if inode number changed so we can rehash inode */ |
| 60 | static int construct_dentry(struct qstr *qstring, struct file *file, |
| 61 | struct inode **ptmp_inode, struct dentry **pnew_dentry) |
| 62 | { |
| 63 | struct dentry *tmp_dentry; |
| 64 | struct cifs_sb_info *cifs_sb; |
| 65 | struct cifsTconInfo *pTcon; |
| 66 | int rc = 0; |
| 67 | |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 68 | cFYI(1, ("For %s", qstring->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); |
| 70 | pTcon = cifs_sb->tcon; |
| 71 | |
| 72 | qstring->hash = full_name_hash(qstring->name, qstring->len); |
| 73 | tmp_dentry = d_lookup(file->f_dentry, qstring); |
| 74 | if (tmp_dentry) { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 75 | cFYI(0, ("existing dentry with inode 0x%p", tmp_dentry->d_inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | *ptmp_inode = tmp_dentry->d_inode; |
| 77 | /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/ |
| 78 | if(*ptmp_inode == NULL) { |
| 79 | *ptmp_inode = new_inode(file->f_dentry->d_sb); |
| 80 | if(*ptmp_inode == NULL) |
| 81 | return rc; |
| 82 | rc = 1; |
| 83 | d_instantiate(tmp_dentry, *ptmp_inode); |
| 84 | } |
| 85 | } else { |
| 86 | tmp_dentry = d_alloc(file->f_dentry, qstring); |
| 87 | if(tmp_dentry == NULL) { |
| 88 | cERROR(1,("Failed allocating dentry")); |
| 89 | *ptmp_inode = NULL; |
| 90 | return rc; |
| 91 | } |
| 92 | |
| 93 | *ptmp_inode = new_inode(file->f_dentry->d_sb); |
Steve French | b92327f | 2005-08-22 20:09:43 -0700 | [diff] [blame] | 94 | if (pTcon->nocase) |
| 95 | tmp_dentry->d_op = &cifs_ci_dentry_ops; |
| 96 | else |
| 97 | tmp_dentry->d_op = &cifs_dentry_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | if(*ptmp_inode == NULL) |
| 99 | return rc; |
| 100 | rc = 1; |
| 101 | d_instantiate(tmp_dentry, *ptmp_inode); |
| 102 | d_rehash(tmp_dentry); |
| 103 | } |
| 104 | |
| 105 | tmp_dentry->d_time = jiffies; |
| 106 | *pnew_dentry = tmp_dentry; |
| 107 | return rc; |
| 108 | } |
| 109 | |
| 110 | static void fill_in_inode(struct inode *tmp_inode, |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 111 | FILE_DIRECTORY_INFO *pfindData, int *pobject_type, int isNewInode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 113 | loff_t local_size; |
| 114 | struct timespec local_mtime; |
| 115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
| 117 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); |
| 118 | __u32 attr = le32_to_cpu(pfindData->ExtFileAttributes); |
| 119 | __u64 allocation_size = le64_to_cpu(pfindData->AllocationSize); |
| 120 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); |
| 121 | |
| 122 | cifsInfo->cifsAttrs = attr; |
| 123 | cifsInfo->time = jiffies; |
| 124 | |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 125 | /* save mtime and size */ |
| 126 | local_mtime = tmp_inode->i_mtime; |
| 127 | local_size = tmp_inode->i_size; |
| 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | /* Linux can not store file creation time unfortunately so ignore it */ |
| 130 | tmp_inode->i_atime = |
| 131 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); |
| 132 | tmp_inode->i_mtime = |
| 133 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); |
| 134 | tmp_inode->i_ctime = |
| 135 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); |
| 136 | /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ |
| 137 | /* 2767 perms - indicate mandatory locking */ |
| 138 | /* BB fill in uid and gid here? with help from winbind? |
| 139 | or retrieve from NTFS stream extended attribute */ |
| 140 | if (atomic_read(&cifsInfo->inUse) == 0) { |
| 141 | tmp_inode->i_uid = cifs_sb->mnt_uid; |
| 142 | tmp_inode->i_gid = cifs_sb->mnt_gid; |
| 143 | /* set default mode. will override for dirs below */ |
| 144 | tmp_inode->i_mode = cifs_sb->mnt_file_mode; |
Steve French | 3020a1f | 2005-11-18 11:31:10 -0800 | [diff] [blame] | 145 | } else { |
| 146 | /* mask off the type bits since it gets set |
| 147 | below and we do not want to get two type |
| 148 | bits set */ |
| 149 | tmp_inode->i_mode &= ~S_IFMT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | } |
| 151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | if (attr & ATTR_DIRECTORY) { |
| 153 | *pobject_type = DT_DIR; |
| 154 | /* override default perms since we do not lock dirs */ |
| 155 | if(atomic_read(&cifsInfo->inUse) == 0) { |
| 156 | tmp_inode->i_mode = cifs_sb->mnt_dir_mode; |
| 157 | } |
| 158 | tmp_inode->i_mode |= S_IFDIR; |
Steve French | eda3c02 | 2005-07-21 15:20:28 -0700 | [diff] [blame] | 159 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
Steve French | 3020a1f | 2005-11-18 11:31:10 -0800 | [diff] [blame] | 160 | (attr & ATTR_SYSTEM)) { |
| 161 | if (end_of_file == 0) { |
| 162 | *pobject_type = DT_FIFO; |
| 163 | tmp_inode->i_mode |= S_IFIFO; |
| 164 | } else { |
| 165 | /* rather than get the type here, we mark the |
| 166 | inode as needing revalidate and get the real type |
| 167 | (blk vs chr vs. symlink) later ie in lookup */ |
| 168 | *pobject_type = DT_REG; |
| 169 | tmp_inode->i_mode |= S_IFREG; |
| 170 | cifsInfo->time = 0; |
| 171 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | /* we no longer mark these because we could not follow them */ |
| 173 | /* } else if (attr & ATTR_REPARSE) { |
| 174 | *pobject_type = DT_LNK; |
| 175 | tmp_inode->i_mode |= S_IFLNK; */ |
| 176 | } else { |
| 177 | *pobject_type = DT_REG; |
| 178 | tmp_inode->i_mode |= S_IFREG; |
| 179 | if (attr & ATTR_READONLY) |
| 180 | tmp_inode->i_mode &= ~(S_IWUGO); |
| 181 | } /* could add code here - to validate if device or weird share type? */ |
| 182 | |
| 183 | /* can not fill in nlink here as in qpathinfo version and Unx search */ |
| 184 | if (atomic_read(&cifsInfo->inUse) == 0) { |
| 185 | atomic_set(&cifsInfo->inUse, 1); |
| 186 | } |
| 187 | |
| 188 | if (is_size_safe_to_change(cifsInfo)) { |
| 189 | /* can not safely change the file size here if the |
| 190 | client is writing to it due to potential races */ |
| 191 | i_size_write(tmp_inode, end_of_file); |
| 192 | |
| 193 | /* 512 bytes (2**9) is the fake blocksize that must be used */ |
| 194 | /* for this calculation, even though the reported blocksize is larger */ |
| 195 | tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; |
| 196 | } |
| 197 | |
| 198 | if (allocation_size < end_of_file) |
| 199 | cFYI(1, ("May be sparse file, allocation less than file size")); |
Andrew Morton | 5515eff | 2006-03-26 01:37:53 -0800 | [diff] [blame] | 200 | cFYI(1, ("File Size %ld and blocks %llu and blocksize %ld", |
| 201 | (unsigned long)tmp_inode->i_size, |
| 202 | (unsigned long long)tmp_inode->i_blocks, |
| 203 | tmp_inode->i_blksize)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | if (S_ISREG(tmp_inode->i_mode)) { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 205 | cFYI(1, ("File inode")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | tmp_inode->i_op = &cifs_file_inode_ops; |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 207 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
| 208 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| 209 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
| 210 | else |
| 211 | tmp_inode->i_fop = &cifs_file_direct_ops; |
| 212 | |
| 213 | } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| 214 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | else |
| 216 | tmp_inode->i_fop = &cifs_file_ops; |
Steve French | f3f6ec4 | 2006-01-08 20:12:58 -0800 | [diff] [blame] | 217 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | tmp_inode->i_data.a_ops = &cifs_addr_ops; |
Steve French | bfa0d75 | 2005-08-31 21:50:37 -0700 | [diff] [blame] | 219 | if((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
| 220 | (cifs_sb->tcon->ses->server->maxBuf < |
| 221 | 4096 + MAX_CIFS_HDR_SIZE)) |
| 222 | tmp_inode->i_data.a_ops->readpages = NULL; |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 223 | if(isNewInode) |
Steve French | dfb7533 | 2005-06-22 17:13:47 -0700 | [diff] [blame] | 224 | return; /* No sense invalidating pages for new inode |
| 225 | since have not started caching readahead file |
| 226 | data yet */ |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 227 | |
| 228 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && |
| 229 | (local_size == tmp_inode->i_size)) { |
| 230 | cFYI(1, ("inode exists but unchanged")); |
| 231 | } else { |
| 232 | /* file may have changed on server */ |
| 233 | cFYI(1, ("invalidate inode, readdir detected change")); |
| 234 | invalidate_remote_inode(tmp_inode); |
| 235 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 237 | cFYI(1, ("Directory inode")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | tmp_inode->i_op = &cifs_dir_inode_ops; |
| 239 | tmp_inode->i_fop = &cifs_dir_ops; |
| 240 | } else if (S_ISLNK(tmp_inode->i_mode)) { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 241 | cFYI(1, ("Symbolic Link inode")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
| 243 | } else { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 244 | cFYI(1, ("Init special inode")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
| 246 | tmp_inode->i_rdev); |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | static void unix_fill_in_inode(struct inode *tmp_inode, |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 251 | FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 253 | loff_t local_size; |
| 254 | struct timespec local_mtime; |
| 255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
| 257 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); |
| 258 | |
| 259 | __u32 type = le32_to_cpu(pfindData->Type); |
| 260 | __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); |
| 261 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); |
| 262 | cifsInfo->time = jiffies; |
| 263 | atomic_inc(&cifsInfo->inUse); |
| 264 | |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 265 | /* save mtime and size */ |
| 266 | local_mtime = tmp_inode->i_mtime; |
| 267 | local_size = tmp_inode->i_size; |
| 268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | tmp_inode->i_atime = |
| 270 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); |
| 271 | tmp_inode->i_mtime = |
| 272 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime)); |
| 273 | tmp_inode->i_ctime = |
| 274 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange)); |
| 275 | |
| 276 | tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); |
Steve French | 3020a1f | 2005-11-18 11:31:10 -0800 | [diff] [blame] | 277 | /* since we set the inode type below we need to mask off type |
| 278 | to avoid strange results if bits above were corrupt */ |
| 279 | tmp_inode->i_mode &= ~S_IFMT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | if (type == UNIX_FILE) { |
| 281 | *pobject_type = DT_REG; |
| 282 | tmp_inode->i_mode |= S_IFREG; |
| 283 | } else if (type == UNIX_SYMLINK) { |
| 284 | *pobject_type = DT_LNK; |
| 285 | tmp_inode->i_mode |= S_IFLNK; |
| 286 | } else if (type == UNIX_DIR) { |
| 287 | *pobject_type = DT_DIR; |
| 288 | tmp_inode->i_mode |= S_IFDIR; |
| 289 | } else if (type == UNIX_CHARDEV) { |
| 290 | *pobject_type = DT_CHR; |
| 291 | tmp_inode->i_mode |= S_IFCHR; |
| 292 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), |
| 293 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); |
| 294 | } else if (type == UNIX_BLOCKDEV) { |
| 295 | *pobject_type = DT_BLK; |
| 296 | tmp_inode->i_mode |= S_IFBLK; |
| 297 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), |
| 298 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); |
| 299 | } else if (type == UNIX_FIFO) { |
| 300 | *pobject_type = DT_FIFO; |
| 301 | tmp_inode->i_mode |= S_IFIFO; |
| 302 | } else if (type == UNIX_SOCKET) { |
| 303 | *pobject_type = DT_SOCK; |
| 304 | tmp_inode->i_mode |= S_IFSOCK; |
Steve French | 3020a1f | 2005-11-18 11:31:10 -0800 | [diff] [blame] | 305 | } else { |
| 306 | /* safest to just call it a file */ |
| 307 | *pobject_type = DT_REG; |
| 308 | tmp_inode->i_mode |= S_IFREG; |
| 309 | cFYI(1,("unknown inode type %d",type)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | } |
| 311 | |
| 312 | tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); |
| 313 | tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); |
| 314 | tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); |
| 315 | |
| 316 | if (is_size_safe_to_change(cifsInfo)) { |
| 317 | /* can not safely change the file size here if the |
| 318 | client is writing to it due to potential races */ |
| 319 | i_size_write(tmp_inode,end_of_file); |
| 320 | |
| 321 | /* 512 bytes (2**9) is the fake blocksize that must be used */ |
| 322 | /* for this calculation, not the real blocksize */ |
| 323 | tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; |
| 324 | } |
| 325 | |
| 326 | if (S_ISREG(tmp_inode->i_mode)) { |
| 327 | cFYI(1, ("File inode")); |
| 328 | tmp_inode->i_op = &cifs_file_inode_ops; |
Steve French | f3f6ec4 | 2006-01-08 20:12:58 -0800 | [diff] [blame] | 329 | |
| 330 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
| 331 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| 332 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
| 333 | else |
| 334 | tmp_inode->i_fop = &cifs_file_direct_ops; |
| 335 | |
| 336 | } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| 337 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | else |
| 339 | tmp_inode->i_fop = &cifs_file_ops; |
Steve French | f3f6ec4 | 2006-01-08 20:12:58 -0800 | [diff] [blame] | 340 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | tmp_inode->i_data.a_ops = &cifs_addr_ops; |
Steve French | bfa0d75 | 2005-08-31 21:50:37 -0700 | [diff] [blame] | 342 | if((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
| 343 | (cifs_sb->tcon->ses->server->maxBuf < |
| 344 | 4096 + MAX_CIFS_HDR_SIZE)) |
| 345 | tmp_inode->i_data.a_ops->readpages = NULL; |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 346 | |
| 347 | if(isNewInode) |
| 348 | return; /* No sense invalidating pages for new inode since we |
| 349 | have not started caching readahead file data yet */ |
| 350 | |
| 351 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && |
| 352 | (local_size == tmp_inode->i_size)) { |
| 353 | cFYI(1, ("inode exists but unchanged")); |
| 354 | } else { |
| 355 | /* file may have changed on server */ |
| 356 | cFYI(1, ("invalidate inode, readdir detected change")); |
| 357 | invalidate_remote_inode(tmp_inode); |
| 358 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
| 360 | cFYI(1, ("Directory inode")); |
| 361 | tmp_inode->i_op = &cifs_dir_inode_ops; |
| 362 | tmp_inode->i_fop = &cifs_dir_ops; |
| 363 | } else if (S_ISLNK(tmp_inode->i_mode)) { |
| 364 | cFYI(1, ("Symbolic Link inode")); |
| 365 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
| 366 | /* tmp_inode->i_fop = *//* do not need to set to anything */ |
| 367 | } else { |
| 368 | cFYI(1, ("Special inode")); |
| 369 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
| 370 | tmp_inode->i_rdev); |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | static int initiate_cifs_search(const int xid, struct file *file) |
| 375 | { |
| 376 | int rc = 0; |
| 377 | char * full_path; |
| 378 | struct cifsFileInfo * cifsFile; |
| 379 | struct cifs_sb_info *cifs_sb; |
| 380 | struct cifsTconInfo *pTcon; |
| 381 | |
| 382 | if(file->private_data == NULL) { |
| 383 | file->private_data = |
| 384 | kmalloc(sizeof(struct cifsFileInfo),GFP_KERNEL); |
| 385 | } |
| 386 | |
| 387 | if(file->private_data == NULL) { |
| 388 | return -ENOMEM; |
| 389 | } else { |
| 390 | memset(file->private_data,0,sizeof(struct cifsFileInfo)); |
| 391 | } |
| 392 | cifsFile = file->private_data; |
| 393 | cifsFile->invalidHandle = TRUE; |
| 394 | cifsFile->srch_inf.endOfSearch = FALSE; |
| 395 | |
| 396 | if(file->f_dentry == NULL) |
| 397 | return -ENOENT; |
| 398 | |
| 399 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); |
| 400 | if(cifs_sb == NULL) |
| 401 | return -EINVAL; |
| 402 | |
| 403 | pTcon = cifs_sb->tcon; |
| 404 | if(pTcon == NULL) |
| 405 | return -EINVAL; |
| 406 | |
Arjan van de Ven | a11f3a0 | 2006-03-23 03:00:33 -0800 | [diff] [blame] | 407 | mutex_lock(&file->f_dentry->d_sb->s_vfs_rename_mutex); |
Steve French | 7f57356 | 2005-08-30 11:32:14 -0700 | [diff] [blame] | 408 | full_path = build_path_from_dentry(file->f_dentry); |
Arjan van de Ven | a11f3a0 | 2006-03-23 03:00:33 -0800 | [diff] [blame] | 409 | mutex_unlock(&file->f_dentry->d_sb->s_vfs_rename_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
| 411 | if(full_path == NULL) { |
| 412 | return -ENOMEM; |
| 413 | } |
| 414 | |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 415 | cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | |
Steve French | 75cf6bd | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 417 | ffirst_retry: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | /* test for Unix extensions */ |
| 419 | if (pTcon->ses->capabilities & CAP_UNIX) { |
| 420 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
| 421 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
| 422 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; |
| 423 | } else /* not srvinos - BB fixme add check for backlevel? */ { |
| 424 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; |
| 425 | } |
| 426 | |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 427 | rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls, |
| 428 | &cifsFile->netfid, &cifsFile->srch_inf, |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 429 | cifs_sb->mnt_cifs_flags & |
| 430 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | if(rc == 0) |
| 432 | cifsFile->invalidHandle = FALSE; |
Steve French | 75cf6bd | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 433 | if((rc == -EOPNOTSUPP) && |
| 434 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
| 435 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; |
| 436 | goto ffirst_retry; |
| 437 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | kfree(full_path); |
| 439 | return rc; |
| 440 | } |
| 441 | |
| 442 | /* return length of unicode string in bytes */ |
| 443 | static int cifs_unicode_bytelen(char *str) |
| 444 | { |
| 445 | int len; |
| 446 | __le16 * ustr = (__le16 *)str; |
| 447 | |
| 448 | for(len=0;len <= PATH_MAX;len++) { |
| 449 | if(ustr[len] == 0) |
| 450 | return len << 1; |
| 451 | } |
| 452 | cFYI(1,("Unicode string longer than PATH_MAX found")); |
| 453 | return len << 1; |
| 454 | } |
| 455 | |
| 456 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb) |
| 457 | { |
| 458 | char * new_entry; |
| 459 | FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; |
| 460 | |
| 461 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); |
| 462 | cFYI(1,("new entry %p old entry %p",new_entry,old_entry)); |
| 463 | /* validate that new_entry is not past end of SMB */ |
| 464 | if(new_entry >= end_of_smb) { |
Steve French | 09d1db5 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 465 | cERROR(1, |
| 466 | ("search entry %p began after end of SMB %p old entry %p", |
| 467 | new_entry, end_of_smb, old_entry)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | return NULL; |
Steve French | 09d1db5 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 469 | } else if (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb) { |
| 470 | cERROR(1,("search entry %p extends after end of SMB %p", |
| 471 | new_entry, end_of_smb)); |
| 472 | return NULL; |
| 473 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | return new_entry; |
| 475 | |
| 476 | } |
| 477 | |
| 478 | #define UNICODE_DOT cpu_to_le16(0x2e) |
| 479 | |
| 480 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ |
| 481 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) |
| 482 | { |
| 483 | int rc = 0; |
| 484 | char * filename = NULL; |
| 485 | int len = 0; |
| 486 | |
| 487 | if(cfile->srch_inf.info_level == 0x202) { |
| 488 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; |
| 489 | filename = &pFindData->FileName[0]; |
| 490 | if(cfile->srch_inf.unicode) { |
| 491 | len = cifs_unicode_bytelen(filename); |
| 492 | } else { |
| 493 | /* BB should we make this strnlen of PATH_MAX? */ |
| 494 | len = strnlen(filename, 5); |
| 495 | } |
| 496 | } else if(cfile->srch_inf.info_level == 0x101) { |
| 497 | FILE_DIRECTORY_INFO * pFindData = |
| 498 | (FILE_DIRECTORY_INFO *)current_entry; |
| 499 | filename = &pFindData->FileName[0]; |
| 500 | len = le32_to_cpu(pFindData->FileNameLength); |
| 501 | } else if(cfile->srch_inf.info_level == 0x102) { |
| 502 | FILE_FULL_DIRECTORY_INFO * pFindData = |
| 503 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
| 504 | filename = &pFindData->FileName[0]; |
| 505 | len = le32_to_cpu(pFindData->FileNameLength); |
| 506 | } else if(cfile->srch_inf.info_level == 0x105) { |
| 507 | SEARCH_ID_FULL_DIR_INFO * pFindData = |
| 508 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
| 509 | filename = &pFindData->FileName[0]; |
| 510 | len = le32_to_cpu(pFindData->FileNameLength); |
| 511 | } else if(cfile->srch_inf.info_level == 0x104) { |
| 512 | FILE_BOTH_DIRECTORY_INFO * pFindData = |
| 513 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
| 514 | filename = &pFindData->FileName[0]; |
| 515 | len = le32_to_cpu(pFindData->FileNameLength); |
| 516 | } else { |
| 517 | cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level)); |
| 518 | } |
| 519 | |
| 520 | if(filename) { |
| 521 | if(cfile->srch_inf.unicode) { |
| 522 | __le16 *ufilename = (__le16 *)filename; |
| 523 | if(len == 2) { |
| 524 | /* check for . */ |
| 525 | if(ufilename[0] == UNICODE_DOT) |
| 526 | rc = 1; |
| 527 | } else if(len == 4) { |
| 528 | /* check for .. */ |
| 529 | if((ufilename[0] == UNICODE_DOT) |
| 530 | &&(ufilename[1] == UNICODE_DOT)) |
| 531 | rc = 2; |
| 532 | } |
| 533 | } else /* ASCII */ { |
| 534 | if(len == 1) { |
| 535 | if(filename[0] == '.') |
| 536 | rc = 1; |
| 537 | } else if(len == 2) { |
| 538 | if((filename[0] == '.') && (filename[1] == '.')) |
| 539 | rc = 2; |
| 540 | } |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | return rc; |
| 545 | } |
| 546 | |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 547 | /* Check if directory that we are searching has changed so we can decide |
| 548 | whether we can use the cached search results from the previous search */ |
| 549 | static int is_dir_changed(struct file * file) |
| 550 | { |
| 551 | struct inode * inode; |
| 552 | struct cifsInodeInfo *cifsInfo; |
| 553 | |
| 554 | if(file->f_dentry == NULL) |
| 555 | return 0; |
| 556 | |
| 557 | inode = file->f_dentry->d_inode; |
| 558 | |
| 559 | if(inode == NULL) |
| 560 | return 0; |
| 561 | |
| 562 | cifsInfo = CIFS_I(inode); |
| 563 | |
| 564 | if(cifsInfo->time == 0) |
| 565 | return 1; /* directory was changed, perhaps due to unlink */ |
| 566 | else |
| 567 | return 0; |
| 568 | |
| 569 | } |
| 570 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | /* find the corresponding entry in the search */ |
| 572 | /* Note that the SMB server returns search entries for . and .. which |
| 573 | complicates logic here if we choose to parse for them and we do not |
| 574 | assume that they are located in the findfirst return buffer.*/ |
| 575 | /* We start counting in the buffer with entry 2 and increment for every |
| 576 | entry (do not increment for . or .. entry) */ |
| 577 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, |
| 578 | struct file *file, char **ppCurrentEntry, int *num_to_ret) |
| 579 | { |
| 580 | int rc = 0; |
| 581 | int pos_in_buf = 0; |
| 582 | loff_t first_entry_in_buffer; |
| 583 | loff_t index_to_find = file->f_pos; |
| 584 | struct cifsFileInfo * cifsFile = file->private_data; |
| 585 | /* check if index in the buffer */ |
| 586 | |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 587 | if((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
| 588 | (num_to_ret == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | return -ENOENT; |
| 590 | |
| 591 | *ppCurrentEntry = NULL; |
| 592 | first_entry_in_buffer = |
| 593 | cifsFile->srch_inf.index_of_last_entry - |
| 594 | cifsFile->srch_inf.entries_in_buffer; |
| 595 | /* dump_cifs_file_struct(file, "In fce ");*/ |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 596 | if(((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
| 597 | is_dir_changed(file)) || |
| 598 | (index_to_find < first_entry_in_buffer)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | /* close and restart search */ |
| 600 | cFYI(1,("search backing up - close and restart search")); |
| 601 | cifsFile->invalidHandle = TRUE; |
| 602 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
| 603 | kfree(cifsFile->search_resume_name); |
| 604 | cifsFile->search_resume_name = NULL; |
| 605 | if(cifsFile->srch_inf.ntwrk_buf_start) { |
| 606 | cFYI(1,("freeing SMB ff cache buf on search rewind")); |
| 607 | cifs_buf_release(cifsFile->srch_inf.ntwrk_buf_start); |
| 608 | } |
| 609 | rc = initiate_cifs_search(xid,file); |
| 610 | if(rc) { |
| 611 | cFYI(1,("error %d reinitiating a search on rewind",rc)); |
| 612 | return rc; |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && |
| 617 | (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){ |
| 618 | cFYI(1,("calling findnext2")); |
Steve French | dfb7533 | 2005-06-22 17:13:47 -0700 | [diff] [blame] | 619 | rc = CIFSFindNext(xid,pTcon,cifsFile->netfid, |
| 620 | &cifsFile->srch_inf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | if(rc) |
| 622 | return -ENOENT; |
| 623 | } |
| 624 | if(index_to_find < cifsFile->srch_inf.index_of_last_entry) { |
| 625 | /* we found the buffer that contains the entry */ |
| 626 | /* scan and find it */ |
| 627 | int i; |
| 628 | char * current_entry; |
| 629 | char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + |
| 630 | smbCalcSize((struct smb_hdr *) |
| 631 | cifsFile->srch_inf.ntwrk_buf_start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
| 633 | - cifsFile->srch_inf.entries_in_buffer; |
| 634 | pos_in_buf = index_to_find - first_entry_in_buffer; |
| 635 | cFYI(1,("found entry - pos_in_buf %d",pos_in_buf)); |
| 636 | current_entry = cifsFile->srch_inf.srch_entries_start; |
| 637 | for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) { |
Steve French | dfb7533 | 2005-06-22 17:13:47 -0700 | [diff] [blame] | 638 | /* go entry by entry figuring out which is first */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | /* if( . or ..) |
| 640 | skip */ |
| 641 | rc = cifs_entry_is_dot(current_entry,cifsFile); |
| 642 | if(rc == 1) /* is . or .. so skip */ { |
| 643 | cFYI(1,("Entry is .")); /* BB removeme BB */ |
| 644 | /* continue; */ |
| 645 | } else if (rc == 2 ) { |
| 646 | cFYI(1,("Entry is ..")); /* BB removeme BB */ |
| 647 | /* continue; */ |
| 648 | } |
| 649 | current_entry = nxt_dir_entry(current_entry,end_of_smb); |
| 650 | } |
| 651 | if((current_entry == NULL) && (i < pos_in_buf)) { |
| 652 | /* BB fixme - check if we should flag this error */ |
| 653 | cERROR(1,("reached end of buf searching for pos in buf" |
| 654 | " %d index to find %lld rc %d", |
| 655 | pos_in_buf,index_to_find,rc)); |
| 656 | } |
| 657 | rc = 0; |
| 658 | *ppCurrentEntry = current_entry; |
| 659 | } else { |
| 660 | cFYI(1,("index not in buffer - could not findnext into it")); |
| 661 | return 0; |
| 662 | } |
| 663 | |
| 664 | if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 665 | cFYI(1,("can not return entries pos_in_buf beyond last entry")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | *num_to_ret = 0; |
| 667 | } else |
| 668 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | |
| 670 | return rc; |
| 671 | } |
| 672 | |
| 673 | /* inode num, inode type and filename returned */ |
| 674 | static int cifs_get_name_from_search_buf(struct qstr *pqst, |
| 675 | char *current_entry, __u16 level, unsigned int unicode, |
| 676 | struct cifs_sb_info * cifs_sb, ino_t *pinum) |
| 677 | { |
| 678 | int rc = 0; |
| 679 | unsigned int len = 0; |
| 680 | char * filename; |
| 681 | struct nls_table * nlt = cifs_sb->local_nls; |
| 682 | |
| 683 | *pinum = 0; |
| 684 | |
| 685 | if(level == SMB_FIND_FILE_UNIX) { |
| 686 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; |
| 687 | |
| 688 | filename = &pFindData->FileName[0]; |
| 689 | if(unicode) { |
| 690 | len = cifs_unicode_bytelen(filename); |
| 691 | } else { |
| 692 | /* BB should we make this strnlen of PATH_MAX? */ |
| 693 | len = strnlen(filename, PATH_MAX); |
| 694 | } |
| 695 | |
| 696 | /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */ |
| 697 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
| 698 | *pinum = pFindData->UniqueId; |
| 699 | } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { |
| 700 | FILE_DIRECTORY_INFO * pFindData = |
| 701 | (FILE_DIRECTORY_INFO *)current_entry; |
| 702 | filename = &pFindData->FileName[0]; |
| 703 | len = le32_to_cpu(pFindData->FileNameLength); |
| 704 | } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
| 705 | FILE_FULL_DIRECTORY_INFO * pFindData = |
| 706 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
| 707 | filename = &pFindData->FileName[0]; |
| 708 | len = le32_to_cpu(pFindData->FileNameLength); |
| 709 | } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
| 710 | SEARCH_ID_FULL_DIR_INFO * pFindData = |
| 711 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
| 712 | filename = &pFindData->FileName[0]; |
| 713 | len = le32_to_cpu(pFindData->FileNameLength); |
| 714 | *pinum = pFindData->UniqueId; |
| 715 | } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
| 716 | FILE_BOTH_DIRECTORY_INFO * pFindData = |
| 717 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
| 718 | filename = &pFindData->FileName[0]; |
| 719 | len = le32_to_cpu(pFindData->FileNameLength); |
| 720 | } else { |
| 721 | cFYI(1,("Unknown findfirst level %d",level)); |
| 722 | return -EINVAL; |
| 723 | } |
| 724 | if(unicode) { |
| 725 | /* BB fixme - test with long names */ |
| 726 | /* Note converted filename can be longer than in unicode */ |
Steve French | 6a0b482 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 727 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
| 728 | pqst->len = cifs_convertUCSpath((char *)pqst->name, |
| 729 | (__le16 *)filename, len/2, nlt); |
| 730 | else |
Steve French | 6a0b482 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 731 | pqst->len = cifs_strfromUCS_le((char *)pqst->name, |
Steve French | e89dc92 | 2005-11-11 15:18:19 -0800 | [diff] [blame] | 732 | (__le16 *)filename,len/2,nlt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | } else { |
| 734 | pqst->name = filename; |
| 735 | pqst->len = len; |
| 736 | } |
| 737 | pqst->hash = full_name_hash(pqst->name,pqst->len); |
| 738 | /* cFYI(1,("filldir on %s",pqst->name)); */ |
| 739 | return rc; |
| 740 | } |
| 741 | |
| 742 | static int cifs_filldir(char *pfindEntry, struct file *file, |
| 743 | filldir_t filldir, void *direntry, char *scratch_buf) |
| 744 | { |
| 745 | int rc = 0; |
| 746 | struct qstr qstring; |
| 747 | struct cifsFileInfo * pCifsF; |
| 748 | unsigned obj_type; |
| 749 | ino_t inum; |
| 750 | struct cifs_sb_info * cifs_sb; |
| 751 | struct inode *tmp_inode; |
| 752 | struct dentry *tmp_dentry; |
| 753 | |
| 754 | /* get filename and len into qstring */ |
| 755 | /* get dentry */ |
| 756 | /* decide whether to create and populate ionde */ |
| 757 | if((direntry == NULL) || (file == NULL)) |
| 758 | return -EINVAL; |
| 759 | |
| 760 | pCifsF = file->private_data; |
| 761 | |
| 762 | if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) |
| 763 | return -ENOENT; |
| 764 | |
| 765 | if(file->f_dentry == NULL) |
| 766 | return -ENOENT; |
| 767 | |
| 768 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); |
| 769 | |
| 770 | qstring.name = scratch_buf; |
| 771 | rc = cifs_get_name_from_search_buf(&qstring,pfindEntry, |
| 772 | pCifsF->srch_inf.info_level, |
| 773 | pCifsF->srch_inf.unicode,cifs_sb, |
| 774 | &inum /* returned */); |
| 775 | |
| 776 | if(rc) |
| 777 | return rc; |
| 778 | |
| 779 | rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry); |
| 780 | if((tmp_inode == NULL) || (tmp_dentry == NULL)) |
| 781 | return -ENOMEM; |
| 782 | |
| 783 | if(rc) { |
| 784 | /* inode created, we need to hash it with right inode number */ |
| 785 | if(inum != 0) { |
| 786 | /* BB fixme - hash the 2 32 quantities bits together if necessary BB */ |
| 787 | tmp_inode->i_ino = inum; |
| 788 | } |
| 789 | insert_inode_hash(tmp_inode); |
| 790 | } |
| 791 | |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 792 | /* we pass in rc below, indicating whether it is a new inode, |
| 793 | so we can figure out whether to invalidate the inode cached |
| 794 | data if the file has changed */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 796 | unix_fill_in_inode(tmp_inode, |
| 797 | (FILE_UNIX_INFO *)pfindEntry,&obj_type, rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | } else { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 799 | fill_in_inode(tmp_inode, |
| 800 | (FILE_DIRECTORY_INFO *)pfindEntry,&obj_type, rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | } |
| 802 | |
Steve French | dfb7533 | 2005-06-22 17:13:47 -0700 | [diff] [blame] | 803 | rc = filldir(direntry,qstring.name,qstring.len,file->f_pos, |
| 804 | tmp_inode->i_ino,obj_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | if(rc) { |
| 806 | cFYI(1,("filldir rc = %d",rc)); |
| 807 | } |
| 808 | |
| 809 | dput(tmp_dentry); |
| 810 | return rc; |
| 811 | } |
| 812 | |
| 813 | static int cifs_save_resume_key(const char *current_entry, |
| 814 | struct cifsFileInfo *cifsFile) |
| 815 | { |
| 816 | int rc = 0; |
| 817 | unsigned int len = 0; |
| 818 | __u16 level; |
| 819 | char * filename; |
| 820 | |
| 821 | if((cifsFile == NULL) || (current_entry == NULL)) |
| 822 | return -EINVAL; |
| 823 | |
| 824 | level = cifsFile->srch_inf.info_level; |
| 825 | |
| 826 | if(level == SMB_FIND_FILE_UNIX) { |
| 827 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; |
| 828 | |
| 829 | filename = &pFindData->FileName[0]; |
| 830 | if(cifsFile->srch_inf.unicode) { |
| 831 | len = cifs_unicode_bytelen(filename); |
| 832 | } else { |
| 833 | /* BB should we make this strnlen of PATH_MAX? */ |
| 834 | len = strnlen(filename, PATH_MAX); |
| 835 | } |
| 836 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; |
| 837 | } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { |
| 838 | FILE_DIRECTORY_INFO * pFindData = |
| 839 | (FILE_DIRECTORY_INFO *)current_entry; |
| 840 | filename = &pFindData->FileName[0]; |
| 841 | len = le32_to_cpu(pFindData->FileNameLength); |
| 842 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; |
| 843 | } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
| 844 | FILE_FULL_DIRECTORY_INFO * pFindData = |
| 845 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
| 846 | filename = &pFindData->FileName[0]; |
| 847 | len = le32_to_cpu(pFindData->FileNameLength); |
| 848 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; |
| 849 | } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
| 850 | SEARCH_ID_FULL_DIR_INFO * pFindData = |
| 851 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
| 852 | filename = &pFindData->FileName[0]; |
| 853 | len = le32_to_cpu(pFindData->FileNameLength); |
| 854 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; |
| 855 | } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
| 856 | FILE_BOTH_DIRECTORY_INFO * pFindData = |
| 857 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
| 858 | filename = &pFindData->FileName[0]; |
| 859 | len = le32_to_cpu(pFindData->FileNameLength); |
| 860 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; |
| 861 | } else { |
| 862 | cFYI(1,("Unknown findfirst level %d",level)); |
| 863 | return -EINVAL; |
| 864 | } |
| 865 | cifsFile->srch_inf.resume_name_len = len; |
| 866 | cifsFile->srch_inf.presume_name = filename; |
| 867 | return rc; |
| 868 | } |
| 869 | |
| 870 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) |
| 871 | { |
| 872 | int rc = 0; |
| 873 | int xid,i; |
| 874 | struct cifs_sb_info *cifs_sb; |
| 875 | struct cifsTconInfo *pTcon; |
| 876 | struct cifsFileInfo *cifsFile = NULL; |
| 877 | char * current_entry; |
| 878 | int num_to_fill = 0; |
| 879 | char * tmp_buf = NULL; |
| 880 | char * end_of_smb; |
| 881 | |
| 882 | xid = GetXid(); |
| 883 | |
| 884 | if(file->f_dentry == NULL) { |
| 885 | FreeXid(xid); |
| 886 | return -EIO; |
| 887 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | |
| 889 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); |
| 890 | pTcon = cifs_sb->tcon; |
| 891 | if(pTcon == NULL) |
| 892 | return -EINVAL; |
| 893 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | switch ((int) file->f_pos) { |
| 895 | case 0: |
| 896 | /*if (filldir(direntry, ".", 1, file->f_pos, |
| 897 | file->f_dentry->d_inode->i_ino, DT_DIR) < 0) { |
| 898 | cERROR(1, ("Filldir for current dir failed ")); |
| 899 | rc = -ENOMEM; |
| 900 | break; |
| 901 | } |
| 902 | file->f_pos++; */ |
| 903 | case 1: |
| 904 | /* if (filldir(direntry, "..", 2, file->f_pos, |
| 905 | file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
| 906 | cERROR(1, ("Filldir for parent dir failed ")); |
| 907 | rc = -ENOMEM; |
| 908 | break; |
| 909 | } |
| 910 | file->f_pos++; */ |
| 911 | case 2: |
| 912 | /* 1) If search is active, |
| 913 | is in current search buffer? |
| 914 | if it before then restart search |
| 915 | if after then keep searching till find it */ |
| 916 | |
| 917 | if(file->private_data == NULL) { |
| 918 | rc = initiate_cifs_search(xid,file); |
| 919 | cFYI(1,("initiate cifs search rc %d",rc)); |
| 920 | if(rc) { |
| 921 | FreeXid(xid); |
| 922 | return rc; |
| 923 | } |
| 924 | } |
| 925 | default: |
| 926 | if(file->private_data == NULL) { |
| 927 | rc = -EINVAL; |
| 928 | FreeXid(xid); |
| 929 | return rc; |
| 930 | } |
| 931 | cifsFile = file->private_data; |
| 932 | if (cifsFile->srch_inf.endOfSearch) { |
| 933 | if(cifsFile->srch_inf.emptyDir) { |
| 934 | cFYI(1, ("End of search, empty dir")); |
| 935 | rc = 0; |
| 936 | break; |
| 937 | } |
| 938 | } /* else { |
| 939 | cifsFile->invalidHandle = TRUE; |
| 940 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
| 941 | } |
| 942 | kfree(cifsFile->search_resume_name); |
| 943 | cifsFile->search_resume_name = NULL; */ |
| 944 | |
| 945 | /* BB account for . and .. in f_pos as special case */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | |
| 947 | rc = find_cifs_entry(xid,pTcon, file, |
| 948 | ¤t_entry,&num_to_fill); |
| 949 | if(rc) { |
| 950 | cFYI(1,("fce error %d",rc)); |
| 951 | goto rddir2_exit; |
| 952 | } else if (current_entry != NULL) { |
| 953 | cFYI(1,("entry %lld found",file->f_pos)); |
| 954 | } else { |
| 955 | cFYI(1,("could not find entry")); |
| 956 | goto rddir2_exit; |
| 957 | } |
| 958 | cFYI(1,("loop through %d times filling dir for net buf %p", |
| 959 | num_to_fill,cifsFile->srch_inf.ntwrk_buf_start)); |
| 960 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + |
| 961 | smbCalcSize((struct smb_hdr *) |
| 962 | cifsFile->srch_inf.ntwrk_buf_start); |
Steve French | 6a0b482 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 963 | /* To be safe - for UCS to UTF-8 with strings loaded |
| 964 | with the rare long characters alloc more to account for |
| 965 | such multibyte target UTF-8 characters. cifs_unicode.c, |
| 966 | which actually does the conversion, has the same limit */ |
| 967 | tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | for(i=0;(i<num_to_fill) && (rc == 0);i++) { |
| 969 | if(current_entry == NULL) { |
| 970 | /* evaluate whether this case is an error */ |
| 971 | cERROR(1,("past end of SMB num to fill %d i %d", |
| 972 | num_to_fill, i)); |
| 973 | break; |
| 974 | } |
| 975 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | rc = cifs_filldir(current_entry, file, |
| 977 | filldir, direntry,tmp_buf); |
| 978 | file->f_pos++; |
| 979 | if(file->f_pos == cifsFile->srch_inf.index_of_last_entry) { |
| 980 | cFYI(1,("last entry in buf at pos %lld %s", |
| 981 | file->f_pos,tmp_buf)); /* BB removeme BB */ |
| 982 | cifs_save_resume_key(current_entry,cifsFile); |
| 983 | break; |
| 984 | } else |
Steve French | dfb7533 | 2005-06-22 17:13:47 -0700 | [diff] [blame] | 985 | current_entry = nxt_dir_entry(current_entry, |
| 986 | end_of_smb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | } |
| 988 | kfree(tmp_buf); |
| 989 | break; |
| 990 | } /* end switch */ |
| 991 | |
| 992 | rddir2_exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | FreeXid(xid); |
| 994 | return rc; |
| 995 | } |