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 | 3677db1 | 2007-02-26 16:46:11 +0000 | [diff] [blame] | 6 | * Copyright (C) International Business Machines Corp., 2004, 2007 |
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> |
Dave Kleikamp | 273d81d | 2006-06-01 19:41:23 +0000 | [diff] [blame] | 24 | #include <linux/pagemap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/stat.h> |
| 26 | #include <linux/smp_lock.h> |
| 27 | #include "cifspdu.h" |
| 28 | #include "cifsglob.h" |
| 29 | #include "cifsproto.h" |
| 30 | #include "cifs_unicode.h" |
| 31 | #include "cifs_debug.h" |
| 32 | #include "cifs_fs_sb.h" |
| 33 | #include "cifsfs.h" |
| 34 | |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 35 | #ifdef CONFIG_CIFS_DEBUG2 |
| 36 | static void dump_cifs_file_struct(struct file *file, char *label) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | { |
| 38 | struct cifsFileInfo * cf; |
| 39 | |
| 40 | if(file) { |
| 41 | cf = file->private_data; |
| 42 | if(cf == NULL) { |
| 43 | cFYI(1,("empty cifs private file data")); |
| 44 | return; |
| 45 | } |
| 46 | if(cf->invalidHandle) { |
| 47 | cFYI(1,("invalid handle")); |
| 48 | } |
| 49 | if(cf->srch_inf.endOfSearch) { |
| 50 | cFYI(1,("end of search")); |
| 51 | } |
| 52 | if(cf->srch_inf.emptyDir) { |
| 53 | cFYI(1,("empty dir")); |
| 54 | } |
| 55 | |
| 56 | } |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 57 | } |
| 58 | #endif /* DEBUG2 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | /* Returns one if new inode created (which therefore needs to be hashed) */ |
| 61 | /* Might check in the future if inode number changed so we can rehash inode */ |
| 62 | static int construct_dentry(struct qstr *qstring, struct file *file, |
| 63 | struct inode **ptmp_inode, struct dentry **pnew_dentry) |
| 64 | { |
| 65 | struct dentry *tmp_dentry; |
| 66 | struct cifs_sb_info *cifs_sb; |
| 67 | struct cifsTconInfo *pTcon; |
| 68 | int rc = 0; |
| 69 | |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 70 | cFYI(1, ("For %s", qstring->name)); |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 71 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | pTcon = cifs_sb->tcon; |
| 73 | |
| 74 | qstring->hash = full_name_hash(qstring->name, qstring->len); |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 75 | tmp_dentry = d_lookup(file->f_path.dentry, qstring); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | if (tmp_dentry) { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 77 | cFYI(0, ("existing dentry with inode 0x%p", tmp_dentry->d_inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | *ptmp_inode = tmp_dentry->d_inode; |
| 79 | /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/ |
| 80 | if(*ptmp_inode == NULL) { |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 81 | *ptmp_inode = new_inode(file->f_path.dentry->d_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | if(*ptmp_inode == NULL) |
| 83 | return rc; |
| 84 | rc = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | } |
Steve French | 1b2b212 | 2007-02-17 04:30:54 +0000 | [diff] [blame] | 86 | if(file->f_path.dentry->d_sb->s_flags & MS_NOATIME) |
| 87 | (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | } else { |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 89 | tmp_dentry = d_alloc(file->f_path.dentry, qstring); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | if(tmp_dentry == NULL) { |
| 91 | cERROR(1,("Failed allocating dentry")); |
| 92 | *ptmp_inode = NULL; |
| 93 | return rc; |
| 94 | } |
| 95 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 96 | *ptmp_inode = new_inode(file->f_path.dentry->d_sb); |
Steve French | b92327f | 2005-08-22 20:09:43 -0700 | [diff] [blame] | 97 | if (pTcon->nocase) |
| 98 | tmp_dentry->d_op = &cifs_ci_dentry_ops; |
| 99 | else |
| 100 | tmp_dentry->d_op = &cifs_dentry_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | if(*ptmp_inode == NULL) |
| 102 | return rc; |
Steve French | 1b2b212 | 2007-02-17 04:30:54 +0000 | [diff] [blame] | 103 | if(file->f_path.dentry->d_sb->s_flags & MS_NOATIME) |
| 104 | (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME; |
Steve French | b835beb | 2006-09-06 22:02:22 +0000 | [diff] [blame] | 105 | rc = 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | } |
| 107 | |
| 108 | tmp_dentry->d_time = jiffies; |
| 109 | *pnew_dentry = tmp_dentry; |
| 110 | return rc; |
| 111 | } |
| 112 | |
Steve French | 533f90a | 2006-10-12 00:02:32 +0000 | [diff] [blame] | 113 | static void AdjustForTZ(struct cifsTconInfo * tcon, struct inode * inode) |
| 114 | { |
| 115 | if((tcon) && (tcon->ses) && (tcon->ses->server)) { |
Steve French | ddae957 | 2006-10-12 01:23:29 +0000 | [diff] [blame] | 116 | inode->i_ctime.tv_sec += tcon->ses->server->timeAdj; |
| 117 | inode->i_mtime.tv_sec += tcon->ses->server->timeAdj; |
| 118 | inode->i_atime.tv_sec += tcon->ses->server->timeAdj; |
Steve French | 533f90a | 2006-10-12 00:02:32 +0000 | [diff] [blame] | 119 | } |
| 120 | return; |
| 121 | } |
| 122 | |
| 123 | |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 124 | static void fill_in_inode(struct inode *tmp_inode, int new_buf_type, |
| 125 | char * buf, int *pobject_type, int isNewInode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 127 | loff_t local_size; |
| 128 | struct timespec local_mtime; |
| 129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
| 131 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 132 | __u32 attr; |
| 133 | __u64 allocation_size; |
| 134 | __u64 end_of_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 136 | /* save mtime and size */ |
| 137 | local_mtime = tmp_inode->i_mtime; |
| 138 | local_size = tmp_inode->i_size; |
| 139 | |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 140 | if(new_buf_type) { |
| 141 | FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf; |
| 142 | |
| 143 | attr = le32_to_cpu(pfindData->ExtFileAttributes); |
| 144 | allocation_size = le64_to_cpu(pfindData->AllocationSize); |
| 145 | end_of_file = le64_to_cpu(pfindData->EndOfFile); |
| 146 | tmp_inode->i_atime = |
| 147 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); |
| 148 | tmp_inode->i_mtime = |
| 149 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); |
| 150 | tmp_inode->i_ctime = |
| 151 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); |
| 152 | } else { /* legacy, OS2 and DOS style */ |
Steve French | 1bd5bbc | 2006-09-28 03:35:57 +0000 | [diff] [blame] | 153 | /* struct timespec ts;*/ |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 154 | FIND_FILE_STANDARD_INFO * pfindData = |
| 155 | (FIND_FILE_STANDARD_INFO *)buf; |
| 156 | |
Steve French | 268f3be | 2006-10-06 21:47:09 +0000 | [diff] [blame] | 157 | tmp_inode->i_mtime = cnvrtDosUnixTm( |
Steve French | 1bd5bbc | 2006-09-28 03:35:57 +0000 | [diff] [blame] | 158 | le16_to_cpu(pfindData->LastWriteDate), |
Steve French | 268f3be | 2006-10-06 21:47:09 +0000 | [diff] [blame] | 159 | le16_to_cpu(pfindData->LastWriteTime)); |
| 160 | tmp_inode->i_atime = cnvrtDosUnixTm( |
| 161 | le16_to_cpu(pfindData->LastAccessDate), |
| 162 | le16_to_cpu(pfindData->LastAccessTime)); |
Steve French | a850790 | 2007-02-06 20:43:30 +0000 | [diff] [blame] | 163 | tmp_inode->i_ctime = cnvrtDosUnixTm( |
| 164 | le16_to_cpu(pfindData->LastWriteDate), |
| 165 | le16_to_cpu(pfindData->LastWriteTime)); |
Steve French | 533f90a | 2006-10-12 00:02:32 +0000 | [diff] [blame] | 166 | AdjustForTZ(cifs_sb->tcon, tmp_inode); |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 167 | attr = le16_to_cpu(pfindData->Attributes); |
| 168 | allocation_size = le32_to_cpu(pfindData->AllocationSize); |
| 169 | end_of_file = le32_to_cpu(pfindData->DataSize); |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 170 | } |
| 171 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | /* Linux can not store file creation time unfortunately so ignore it */ |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 173 | |
| 174 | cifsInfo->cifsAttrs = attr; |
| 175 | cifsInfo->time = jiffies; |
| 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ |
| 178 | /* 2767 perms - indicate mandatory locking */ |
| 179 | /* BB fill in uid and gid here? with help from winbind? |
| 180 | or retrieve from NTFS stream extended attribute */ |
| 181 | if (atomic_read(&cifsInfo->inUse) == 0) { |
| 182 | tmp_inode->i_uid = cifs_sb->mnt_uid; |
| 183 | tmp_inode->i_gid = cifs_sb->mnt_gid; |
| 184 | /* set default mode. will override for dirs below */ |
| 185 | tmp_inode->i_mode = cifs_sb->mnt_file_mode; |
Steve French | 3020a1f | 2005-11-18 11:31:10 -0800 | [diff] [blame] | 186 | } else { |
| 187 | /* mask off the type bits since it gets set |
| 188 | below and we do not want to get two type |
| 189 | bits set */ |
| 190 | tmp_inode->i_mode &= ~S_IFMT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | } |
| 192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | if (attr & ATTR_DIRECTORY) { |
| 194 | *pobject_type = DT_DIR; |
| 195 | /* override default perms since we do not lock dirs */ |
| 196 | if(atomic_read(&cifsInfo->inUse) == 0) { |
| 197 | tmp_inode->i_mode = cifs_sb->mnt_dir_mode; |
| 198 | } |
| 199 | tmp_inode->i_mode |= S_IFDIR; |
Steve French | eda3c029 | 2005-07-21 15:20:28 -0700 | [diff] [blame] | 200 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
Steve French | 3020a1f | 2005-11-18 11:31:10 -0800 | [diff] [blame] | 201 | (attr & ATTR_SYSTEM)) { |
| 202 | if (end_of_file == 0) { |
| 203 | *pobject_type = DT_FIFO; |
| 204 | tmp_inode->i_mode |= S_IFIFO; |
| 205 | } else { |
| 206 | /* rather than get the type here, we mark the |
| 207 | inode as needing revalidate and get the real type |
| 208 | (blk vs chr vs. symlink) later ie in lookup */ |
| 209 | *pobject_type = DT_REG; |
| 210 | tmp_inode->i_mode |= S_IFREG; |
| 211 | cifsInfo->time = 0; |
| 212 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | /* we no longer mark these because we could not follow them */ |
| 214 | /* } else if (attr & ATTR_REPARSE) { |
| 215 | *pobject_type = DT_LNK; |
| 216 | tmp_inode->i_mode |= S_IFLNK; */ |
| 217 | } else { |
| 218 | *pobject_type = DT_REG; |
| 219 | tmp_inode->i_mode |= S_IFREG; |
| 220 | if (attr & ATTR_READONLY) |
| 221 | tmp_inode->i_mode &= ~(S_IWUGO); |
Alan Tyson | f5c1e2e | 2007-03-10 06:05:14 +0000 | [diff] [blame] | 222 | else if ((tmp_inode->i_mode & S_IWUGO) == 0) |
| 223 | /* the ATTR_READONLY flag may have been changed on */ |
| 224 | /* server -- set any w bits allowed by mnt_file_mode */ |
| 225 | tmp_inode->i_mode |= (S_IWUGO & cifs_sb->mnt_file_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | } /* could add code here - to validate if device or weird share type? */ |
| 227 | |
| 228 | /* can not fill in nlink here as in qpathinfo version and Unx search */ |
| 229 | if (atomic_read(&cifsInfo->inUse) == 0) { |
| 230 | atomic_set(&cifsInfo->inUse, 1); |
| 231 | } |
| 232 | |
Steve French | 3677db1 | 2007-02-26 16:46:11 +0000 | [diff] [blame] | 233 | spin_lock(&tmp_inode->i_lock); |
Steve French | 7ba5263 | 2007-02-08 18:14:13 +0000 | [diff] [blame] | 234 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | /* can not safely change the file size here if the |
| 236 | client is writing to it due to potential races */ |
| 237 | i_size_write(tmp_inode, end_of_file); |
| 238 | |
| 239 | /* 512 bytes (2**9) is the fake blocksize that must be used */ |
| 240 | /* for this calculation, even though the reported blocksize is larger */ |
| 241 | tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; |
| 242 | } |
Steve French | 3677db1 | 2007-02-26 16:46:11 +0000 | [diff] [blame] | 243 | spin_unlock(&tmp_inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
| 245 | if (allocation_size < end_of_file) |
| 246 | cFYI(1, ("May be sparse file, allocation less than file size")); |
Theodore Ts'o | ba52de1 | 2006-09-27 01:50:49 -0700 | [diff] [blame] | 247 | cFYI(1, ("File Size %ld and blocks %llu", |
Andrew Morton | 5515eff | 2006-03-26 01:37:53 -0800 | [diff] [blame] | 248 | (unsigned long)tmp_inode->i_size, |
Theodore Ts'o | ba52de1 | 2006-09-27 01:50:49 -0700 | [diff] [blame] | 249 | (unsigned long long)tmp_inode->i_blocks)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | if (S_ISREG(tmp_inode->i_mode)) { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 251 | cFYI(1, ("File inode")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | tmp_inode->i_op = &cifs_file_inode_ops; |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 253 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
| 254 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| 255 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
| 256 | else |
| 257 | tmp_inode->i_fop = &cifs_file_direct_ops; |
| 258 | |
| 259 | } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| 260 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | else |
| 262 | tmp_inode->i_fop = &cifs_file_ops; |
Steve French | f3f6ec4 | 2006-01-08 20:12:58 -0800 | [diff] [blame] | 263 | |
Steve French | bfa0d75 | 2005-08-31 21:50:37 -0700 | [diff] [blame] | 264 | if((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
| 265 | (cifs_sb->tcon->ses->server->maxBuf < |
Dave Kleikamp | 273d81d | 2006-06-01 19:41:23 +0000 | [diff] [blame] | 266 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
| 267 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; |
| 268 | else |
| 269 | tmp_inode->i_data.a_ops = &cifs_addr_ops; |
| 270 | |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 271 | if(isNewInode) |
Steve French | dfb7533 | 2005-06-22 17:13:47 -0700 | [diff] [blame] | 272 | return; /* No sense invalidating pages for new inode |
| 273 | since have not started caching readahead file |
| 274 | data yet */ |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 275 | |
| 276 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && |
| 277 | (local_size == tmp_inode->i_size)) { |
| 278 | cFYI(1, ("inode exists but unchanged")); |
| 279 | } else { |
| 280 | /* file may have changed on server */ |
| 281 | cFYI(1, ("invalidate inode, readdir detected change")); |
| 282 | invalidate_remote_inode(tmp_inode); |
| 283 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 285 | cFYI(1, ("Directory inode")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | tmp_inode->i_op = &cifs_dir_inode_ops; |
| 287 | tmp_inode->i_fop = &cifs_dir_ops; |
| 288 | } else if (S_ISLNK(tmp_inode->i_mode)) { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 289 | cFYI(1, ("Symbolic Link inode")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
| 291 | } else { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 292 | cFYI(1, ("Init special inode")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
| 294 | tmp_inode->i_rdev); |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | static void unix_fill_in_inode(struct inode *tmp_inode, |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 299 | FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | { |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 301 | loff_t local_size; |
| 302 | struct timespec local_mtime; |
| 303 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
| 305 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); |
| 306 | |
| 307 | __u32 type = le32_to_cpu(pfindData->Type); |
| 308 | __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); |
| 309 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); |
| 310 | cifsInfo->time = jiffies; |
| 311 | atomic_inc(&cifsInfo->inUse); |
| 312 | |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 313 | /* save mtime and size */ |
| 314 | local_mtime = tmp_inode->i_mtime; |
| 315 | local_size = tmp_inode->i_size; |
| 316 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | tmp_inode->i_atime = |
| 318 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); |
| 319 | tmp_inode->i_mtime = |
| 320 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime)); |
| 321 | tmp_inode->i_ctime = |
| 322 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange)); |
| 323 | |
| 324 | tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); |
Steve French | 3020a1f | 2005-11-18 11:31:10 -0800 | [diff] [blame] | 325 | /* since we set the inode type below we need to mask off type |
| 326 | to avoid strange results if bits above were corrupt */ |
| 327 | tmp_inode->i_mode &= ~S_IFMT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | if (type == UNIX_FILE) { |
| 329 | *pobject_type = DT_REG; |
| 330 | tmp_inode->i_mode |= S_IFREG; |
| 331 | } else if (type == UNIX_SYMLINK) { |
| 332 | *pobject_type = DT_LNK; |
| 333 | tmp_inode->i_mode |= S_IFLNK; |
| 334 | } else if (type == UNIX_DIR) { |
| 335 | *pobject_type = DT_DIR; |
| 336 | tmp_inode->i_mode |= S_IFDIR; |
| 337 | } else if (type == UNIX_CHARDEV) { |
| 338 | *pobject_type = DT_CHR; |
| 339 | tmp_inode->i_mode |= S_IFCHR; |
| 340 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), |
| 341 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); |
| 342 | } else if (type == UNIX_BLOCKDEV) { |
| 343 | *pobject_type = DT_BLK; |
| 344 | tmp_inode->i_mode |= S_IFBLK; |
| 345 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), |
| 346 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); |
| 347 | } else if (type == UNIX_FIFO) { |
| 348 | *pobject_type = DT_FIFO; |
| 349 | tmp_inode->i_mode |= S_IFIFO; |
| 350 | } else if (type == UNIX_SOCKET) { |
| 351 | *pobject_type = DT_SOCK; |
| 352 | tmp_inode->i_mode |= S_IFSOCK; |
Steve French | 3020a1f | 2005-11-18 11:31:10 -0800 | [diff] [blame] | 353 | } else { |
| 354 | /* safest to just call it a file */ |
| 355 | *pobject_type = DT_REG; |
| 356 | tmp_inode->i_mode |= S_IFREG; |
| 357 | cFYI(1,("unknown inode type %d",type)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | } |
| 359 | |
| 360 | tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); |
| 361 | tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); |
| 362 | tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); |
| 363 | |
Steve French | 3677db1 | 2007-02-26 16:46:11 +0000 | [diff] [blame] | 364 | spin_lock(&tmp_inode->i_lock); |
Steve French | 7ba5263 | 2007-02-08 18:14:13 +0000 | [diff] [blame] | 365 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | /* can not safely change the file size here if the |
| 367 | client is writing to it due to potential races */ |
Steve French | 7ba5263 | 2007-02-08 18:14:13 +0000 | [diff] [blame] | 368 | i_size_write(tmp_inode, end_of_file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | |
| 370 | /* 512 bytes (2**9) is the fake blocksize that must be used */ |
| 371 | /* for this calculation, not the real blocksize */ |
| 372 | tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; |
| 373 | } |
Steve French | 3677db1 | 2007-02-26 16:46:11 +0000 | [diff] [blame] | 374 | spin_unlock(&tmp_inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
| 376 | if (S_ISREG(tmp_inode->i_mode)) { |
| 377 | cFYI(1, ("File inode")); |
| 378 | tmp_inode->i_op = &cifs_file_inode_ops; |
Steve French | f3f6ec4 | 2006-01-08 20:12:58 -0800 | [diff] [blame] | 379 | |
| 380 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
| 381 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| 382 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
| 383 | else |
| 384 | tmp_inode->i_fop = &cifs_file_direct_ops; |
| 385 | |
| 386 | } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| 387 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | else |
| 389 | tmp_inode->i_fop = &cifs_file_ops; |
Steve French | f3f6ec4 | 2006-01-08 20:12:58 -0800 | [diff] [blame] | 390 | |
Steve French | bfa0d75 | 2005-08-31 21:50:37 -0700 | [diff] [blame] | 391 | if((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
| 392 | (cifs_sb->tcon->ses->server->maxBuf < |
Dave Kleikamp | 273d81d | 2006-06-01 19:41:23 +0000 | [diff] [blame] | 393 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
| 394 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; |
| 395 | else |
| 396 | tmp_inode->i_data.a_ops = &cifs_addr_ops; |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 397 | |
| 398 | if(isNewInode) |
| 399 | return; /* No sense invalidating pages for new inode since we |
| 400 | have not started caching readahead file data yet */ |
| 401 | |
| 402 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && |
| 403 | (local_size == tmp_inode->i_size)) { |
| 404 | cFYI(1, ("inode exists but unchanged")); |
| 405 | } else { |
| 406 | /* file may have changed on server */ |
| 407 | cFYI(1, ("invalidate inode, readdir detected change")); |
| 408 | invalidate_remote_inode(tmp_inode); |
| 409 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
| 411 | cFYI(1, ("Directory inode")); |
| 412 | tmp_inode->i_op = &cifs_dir_inode_ops; |
| 413 | tmp_inode->i_fop = &cifs_dir_ops; |
| 414 | } else if (S_ISLNK(tmp_inode->i_mode)) { |
| 415 | cFYI(1, ("Symbolic Link inode")); |
| 416 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
| 417 | /* tmp_inode->i_fop = *//* do not need to set to anything */ |
| 418 | } else { |
| 419 | cFYI(1, ("Special inode")); |
| 420 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
| 421 | tmp_inode->i_rdev); |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | static int initiate_cifs_search(const int xid, struct file *file) |
| 426 | { |
| 427 | int rc = 0; |
| 428 | char * full_path; |
| 429 | struct cifsFileInfo * cifsFile; |
| 430 | struct cifs_sb_info *cifs_sb; |
| 431 | struct cifsTconInfo *pTcon; |
| 432 | |
| 433 | if(file->private_data == NULL) { |
| 434 | file->private_data = |
| 435 | kmalloc(sizeof(struct cifsFileInfo),GFP_KERNEL); |
| 436 | } |
| 437 | |
| 438 | if(file->private_data == NULL) { |
| 439 | return -ENOMEM; |
| 440 | } else { |
| 441 | memset(file->private_data,0,sizeof(struct cifsFileInfo)); |
| 442 | } |
| 443 | cifsFile = file->private_data; |
| 444 | cifsFile->invalidHandle = TRUE; |
| 445 | cifsFile->srch_inf.endOfSearch = FALSE; |
| 446 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 447 | if(file->f_path.dentry == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | return -ENOENT; |
| 449 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 450 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | if(cifs_sb == NULL) |
| 452 | return -EINVAL; |
| 453 | |
| 454 | pTcon = cifs_sb->tcon; |
| 455 | if(pTcon == NULL) |
| 456 | return -EINVAL; |
| 457 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 458 | full_path = build_path_from_dentry(file->f_path.dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | |
| 460 | if(full_path == NULL) { |
| 461 | return -ENOMEM; |
| 462 | } |
| 463 | |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 464 | 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] | 465 | |
Steve French | 75cf6bd | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 466 | ffirst_retry: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | /* test for Unix extensions */ |
| 468 | if (pTcon->ses->capabilities & CAP_UNIX) { |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 469 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
| 470 | } else if ((pTcon->ses->capabilities & |
| 471 | (CAP_NT_SMBS | CAP_NT_FIND)) == 0) { |
| 472 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
| 474 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; |
| 475 | } else /* not srvinos - BB fixme add check for backlevel? */ { |
| 476 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; |
| 477 | } |
| 478 | |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 479 | rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls, |
| 480 | &cifsFile->netfid, &cifsFile->srch_inf, |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 481 | cifs_sb->mnt_cifs_flags & |
| 482 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | if(rc == 0) |
| 484 | cifsFile->invalidHandle = FALSE; |
Steve French | 75cf6bd | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 485 | if((rc == -EOPNOTSUPP) && |
| 486 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
| 487 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; |
| 488 | goto ffirst_retry; |
| 489 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | kfree(full_path); |
| 491 | return rc; |
| 492 | } |
| 493 | |
| 494 | /* return length of unicode string in bytes */ |
| 495 | static int cifs_unicode_bytelen(char *str) |
| 496 | { |
| 497 | int len; |
| 498 | __le16 * ustr = (__le16 *)str; |
| 499 | |
| 500 | for(len=0;len <= PATH_MAX;len++) { |
| 501 | if(ustr[len] == 0) |
| 502 | return len << 1; |
| 503 | } |
| 504 | cFYI(1,("Unicode string longer than PATH_MAX found")); |
| 505 | return len << 1; |
| 506 | } |
| 507 | |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 508 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | { |
| 510 | char * new_entry; |
| 511 | FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; |
| 512 | |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 513 | if(level == SMB_FIND_FILE_INFO_STANDARD) { |
| 514 | FIND_FILE_STANDARD_INFO * pfData; |
| 515 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; |
| 516 | |
| 517 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + |
| 518 | pfData->FileNameLength; |
| 519 | } else |
| 520 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | cFYI(1,("new entry %p old entry %p",new_entry,old_entry)); |
| 522 | /* validate that new_entry is not past end of SMB */ |
| 523 | if(new_entry >= end_of_smb) { |
Steve French | 09d1db5 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 524 | cERROR(1, |
| 525 | ("search entry %p began after end of SMB %p old entry %p", |
| 526 | new_entry, end_of_smb, old_entry)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | return NULL; |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 528 | } else if(((level == SMB_FIND_FILE_INFO_STANDARD) && |
| 529 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) || |
| 530 | ((level != SMB_FIND_FILE_INFO_STANDARD) && |
| 531 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { |
Steve French | 09d1db5 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 532 | cERROR(1,("search entry %p extends after end of SMB %p", |
| 533 | new_entry, end_of_smb)); |
| 534 | return NULL; |
| 535 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | return new_entry; |
| 537 | |
| 538 | } |
| 539 | |
| 540 | #define UNICODE_DOT cpu_to_le16(0x2e) |
| 541 | |
| 542 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ |
| 543 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) |
| 544 | { |
| 545 | int rc = 0; |
| 546 | char * filename = NULL; |
| 547 | int len = 0; |
| 548 | |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 549 | if(cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; |
| 551 | filename = &pFindData->FileName[0]; |
| 552 | if(cfile->srch_inf.unicode) { |
| 553 | len = cifs_unicode_bytelen(filename); |
| 554 | } else { |
| 555 | /* BB should we make this strnlen of PATH_MAX? */ |
| 556 | len = strnlen(filename, 5); |
| 557 | } |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 558 | } else if(cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | FILE_DIRECTORY_INFO * pFindData = |
| 560 | (FILE_DIRECTORY_INFO *)current_entry; |
| 561 | filename = &pFindData->FileName[0]; |
| 562 | len = le32_to_cpu(pFindData->FileNameLength); |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 563 | } else if(cfile->srch_inf.info_level == |
| 564 | SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | FILE_FULL_DIRECTORY_INFO * pFindData = |
| 566 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
| 567 | filename = &pFindData->FileName[0]; |
| 568 | len = le32_to_cpu(pFindData->FileNameLength); |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 569 | } else if(cfile->srch_inf.info_level == |
| 570 | SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | SEARCH_ID_FULL_DIR_INFO * pFindData = |
| 572 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
| 573 | filename = &pFindData->FileName[0]; |
| 574 | len = le32_to_cpu(pFindData->FileNameLength); |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 575 | } else if(cfile->srch_inf.info_level == |
| 576 | SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | FILE_BOTH_DIRECTORY_INFO * pFindData = |
| 578 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
| 579 | filename = &pFindData->FileName[0]; |
| 580 | len = le32_to_cpu(pFindData->FileNameLength); |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 581 | } else if(cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) { |
| 582 | FIND_FILE_STANDARD_INFO * pFindData = |
| 583 | (FIND_FILE_STANDARD_INFO *)current_entry; |
| 584 | filename = &pFindData->FileName[0]; |
Steve French | 5ddaa68 | 2006-08-15 13:35:48 +0000 | [diff] [blame] | 585 | len = pFindData->FileNameLength; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | } else { |
| 587 | cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level)); |
| 588 | } |
| 589 | |
| 590 | if(filename) { |
| 591 | if(cfile->srch_inf.unicode) { |
| 592 | __le16 *ufilename = (__le16 *)filename; |
| 593 | if(len == 2) { |
| 594 | /* check for . */ |
| 595 | if(ufilename[0] == UNICODE_DOT) |
| 596 | rc = 1; |
| 597 | } else if(len == 4) { |
| 598 | /* check for .. */ |
| 599 | if((ufilename[0] == UNICODE_DOT) |
| 600 | &&(ufilename[1] == UNICODE_DOT)) |
| 601 | rc = 2; |
| 602 | } |
| 603 | } else /* ASCII */ { |
| 604 | if(len == 1) { |
| 605 | if(filename[0] == '.') |
| 606 | rc = 1; |
| 607 | } else if(len == 2) { |
| 608 | if((filename[0] == '.') && (filename[1] == '.')) |
| 609 | rc = 2; |
| 610 | } |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | return rc; |
| 615 | } |
| 616 | |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 617 | /* Check if directory that we are searching has changed so we can decide |
| 618 | whether we can use the cached search results from the previous search */ |
| 619 | static int is_dir_changed(struct file * file) |
| 620 | { |
| 621 | struct inode * inode; |
| 622 | struct cifsInodeInfo *cifsInfo; |
| 623 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 624 | if(file->f_path.dentry == NULL) |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 625 | return 0; |
| 626 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 627 | inode = file->f_path.dentry->d_inode; |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 628 | |
| 629 | if(inode == NULL) |
| 630 | return 0; |
| 631 | |
| 632 | cifsInfo = CIFS_I(inode); |
| 633 | |
| 634 | if(cifsInfo->time == 0) |
| 635 | return 1; /* directory was changed, perhaps due to unlink */ |
| 636 | else |
| 637 | return 0; |
| 638 | |
| 639 | } |
| 640 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | /* find the corresponding entry in the search */ |
| 642 | /* Note that the SMB server returns search entries for . and .. which |
| 643 | complicates logic here if we choose to parse for them and we do not |
| 644 | assume that they are located in the findfirst return buffer.*/ |
| 645 | /* We start counting in the buffer with entry 2 and increment for every |
| 646 | entry (do not increment for . or .. entry) */ |
| 647 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, |
| 648 | struct file *file, char **ppCurrentEntry, int *num_to_ret) |
| 649 | { |
| 650 | int rc = 0; |
| 651 | int pos_in_buf = 0; |
| 652 | loff_t first_entry_in_buffer; |
| 653 | loff_t index_to_find = file->f_pos; |
| 654 | struct cifsFileInfo * cifsFile = file->private_data; |
| 655 | /* check if index in the buffer */ |
| 656 | |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 657 | if((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
| 658 | (num_to_ret == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | return -ENOENT; |
| 660 | |
| 661 | *ppCurrentEntry = NULL; |
| 662 | first_entry_in_buffer = |
| 663 | cifsFile->srch_inf.index_of_last_entry - |
| 664 | cifsFile->srch_inf.entries_in_buffer; |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 665 | |
| 666 | /* if first entry in buf is zero then is first buffer |
| 667 | in search response data which means it is likely . and .. |
| 668 | will be in this buffer, although some servers do not return |
| 669 | . and .. for the root of a drive and for those we need |
| 670 | to start two entries earlier */ |
| 671 | |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 672 | #ifdef CONFIG_CIFS_DEBUG2 |
| 673 | dump_cifs_file_struct(file, "In fce "); |
| 674 | #endif |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 675 | if(((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
| 676 | is_dir_changed(file)) || |
| 677 | (index_to_find < first_entry_in_buffer)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | /* close and restart search */ |
| 679 | cFYI(1,("search backing up - close and restart search")); |
| 680 | cifsFile->invalidHandle = TRUE; |
| 681 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
| 682 | kfree(cifsFile->search_resume_name); |
| 683 | cifsFile->search_resume_name = NULL; |
| 684 | if(cifsFile->srch_inf.ntwrk_buf_start) { |
| 685 | cFYI(1,("freeing SMB ff cache buf on search rewind")); |
Steve French | d47d7c1 | 2006-02-28 03:45:48 +0000 | [diff] [blame] | 686 | if(cifsFile->srch_inf.smallBuf) |
| 687 | cifs_small_buf_release(cifsFile->srch_inf. |
| 688 | ntwrk_buf_start); |
| 689 | else |
| 690 | cifs_buf_release(cifsFile->srch_inf. |
| 691 | ntwrk_buf_start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | } |
| 693 | rc = initiate_cifs_search(xid,file); |
| 694 | if(rc) { |
| 695 | cFYI(1,("error %d reinitiating a search on rewind",rc)); |
| 696 | return rc; |
| 697 | } |
| 698 | } |
| 699 | |
| 700 | while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && |
| 701 | (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){ |
| 702 | cFYI(1,("calling findnext2")); |
Steve French | dfb7533 | 2005-06-22 17:13:47 -0700 | [diff] [blame] | 703 | rc = CIFSFindNext(xid,pTcon,cifsFile->netfid, |
| 704 | &cifsFile->srch_inf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | if(rc) |
| 706 | return -ENOENT; |
| 707 | } |
| 708 | if(index_to_find < cifsFile->srch_inf.index_of_last_entry) { |
| 709 | /* we found the buffer that contains the entry */ |
| 710 | /* scan and find it */ |
| 711 | int i; |
| 712 | char * current_entry; |
| 713 | char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + |
| 714 | smbCalcSize((struct smb_hdr *) |
| 715 | cifsFile->srch_inf.ntwrk_buf_start); |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 716 | |
| 717 | current_entry = cifsFile->srch_inf.srch_entries_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
| 719 | - cifsFile->srch_inf.entries_in_buffer; |
| 720 | pos_in_buf = index_to_find - first_entry_in_buffer; |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 721 | cFYI(1,("found entry - pos_in_buf %d",pos_in_buf)); |
| 722 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) { |
Steve French | dfb7533 | 2005-06-22 17:13:47 -0700 | [diff] [blame] | 724 | /* go entry by entry figuring out which is first */ |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 725 | current_entry = nxt_dir_entry(current_entry,end_of_smb, |
| 726 | cifsFile->srch_inf.info_level); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | } |
| 728 | if((current_entry == NULL) && (i < pos_in_buf)) { |
| 729 | /* BB fixme - check if we should flag this error */ |
| 730 | cERROR(1,("reached end of buf searching for pos in buf" |
| 731 | " %d index to find %lld rc %d", |
| 732 | pos_in_buf,index_to_find,rc)); |
| 733 | } |
| 734 | rc = 0; |
| 735 | *ppCurrentEntry = current_entry; |
| 736 | } else { |
| 737 | cFYI(1,("index not in buffer - could not findnext into it")); |
| 738 | return 0; |
| 739 | } |
| 740 | |
| 741 | if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 742 | cFYI(1,("can not return entries pos_in_buf beyond last entry")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | *num_to_ret = 0; |
| 744 | } else |
| 745 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | |
| 747 | return rc; |
| 748 | } |
| 749 | |
| 750 | /* inode num, inode type and filename returned */ |
| 751 | static int cifs_get_name_from_search_buf(struct qstr *pqst, |
| 752 | char *current_entry, __u16 level, unsigned int unicode, |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 753 | struct cifs_sb_info * cifs_sb, int max_len, ino_t *pinum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | { |
| 755 | int rc = 0; |
| 756 | unsigned int len = 0; |
| 757 | char * filename; |
| 758 | struct nls_table * nlt = cifs_sb->local_nls; |
| 759 | |
| 760 | *pinum = 0; |
| 761 | |
| 762 | if(level == SMB_FIND_FILE_UNIX) { |
| 763 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; |
| 764 | |
| 765 | filename = &pFindData->FileName[0]; |
| 766 | if(unicode) { |
| 767 | len = cifs_unicode_bytelen(filename); |
| 768 | } else { |
| 769 | /* BB should we make this strnlen of PATH_MAX? */ |
| 770 | len = strnlen(filename, PATH_MAX); |
| 771 | } |
| 772 | |
| 773 | /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */ |
| 774 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
| 775 | *pinum = pFindData->UniqueId; |
| 776 | } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { |
| 777 | FILE_DIRECTORY_INFO * pFindData = |
| 778 | (FILE_DIRECTORY_INFO *)current_entry; |
| 779 | filename = &pFindData->FileName[0]; |
| 780 | len = le32_to_cpu(pFindData->FileNameLength); |
| 781 | } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
| 782 | FILE_FULL_DIRECTORY_INFO * pFindData = |
| 783 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
| 784 | filename = &pFindData->FileName[0]; |
| 785 | len = le32_to_cpu(pFindData->FileNameLength); |
| 786 | } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
| 787 | SEARCH_ID_FULL_DIR_INFO * pFindData = |
| 788 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
| 789 | filename = &pFindData->FileName[0]; |
| 790 | len = le32_to_cpu(pFindData->FileNameLength); |
| 791 | *pinum = pFindData->UniqueId; |
| 792 | } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
| 793 | FILE_BOTH_DIRECTORY_INFO * pFindData = |
| 794 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
| 795 | filename = &pFindData->FileName[0]; |
| 796 | len = le32_to_cpu(pFindData->FileNameLength); |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 797 | } else if(level == SMB_FIND_FILE_INFO_STANDARD) { |
| 798 | FIND_FILE_STANDARD_INFO * pFindData = |
| 799 | (FIND_FILE_STANDARD_INFO *)current_entry; |
| 800 | filename = &pFindData->FileName[0]; |
| 801 | /* one byte length, no name conversion */ |
| 802 | len = (unsigned int)pFindData->FileNameLength; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | } else { |
| 804 | cFYI(1,("Unknown findfirst level %d",level)); |
| 805 | return -EINVAL; |
| 806 | } |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 807 | |
| 808 | if(len > max_len) { |
| 809 | cERROR(1,("bad search response length %d past smb end", len)); |
| 810 | return -EINVAL; |
| 811 | } |
| 812 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | if(unicode) { |
| 814 | /* BB fixme - test with long names */ |
| 815 | /* Note converted filename can be longer than in unicode */ |
Steve French | 6a0b482 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 816 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
| 817 | pqst->len = cifs_convertUCSpath((char *)pqst->name, |
| 818 | (__le16 *)filename, len/2, nlt); |
| 819 | else |
Steve French | 6a0b482 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 820 | pqst->len = cifs_strfromUCS_le((char *)pqst->name, |
Steve French | e89dc92 | 2005-11-11 15:18:19 -0800 | [diff] [blame] | 821 | (__le16 *)filename,len/2,nlt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | } else { |
| 823 | pqst->name = filename; |
| 824 | pqst->len = len; |
| 825 | } |
| 826 | pqst->hash = full_name_hash(pqst->name,pqst->len); |
| 827 | /* cFYI(1,("filldir on %s",pqst->name)); */ |
| 828 | return rc; |
| 829 | } |
| 830 | |
| 831 | static int cifs_filldir(char *pfindEntry, struct file *file, |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 832 | filldir_t filldir, void *direntry, char *scratch_buf, int max_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | { |
| 834 | int rc = 0; |
| 835 | struct qstr qstring; |
| 836 | struct cifsFileInfo * pCifsF; |
| 837 | unsigned obj_type; |
| 838 | ino_t inum; |
| 839 | struct cifs_sb_info * cifs_sb; |
| 840 | struct inode *tmp_inode; |
| 841 | struct dentry *tmp_dentry; |
| 842 | |
| 843 | /* get filename and len into qstring */ |
| 844 | /* get dentry */ |
| 845 | /* decide whether to create and populate ionde */ |
| 846 | if((direntry == NULL) || (file == NULL)) |
| 847 | return -EINVAL; |
| 848 | |
| 849 | pCifsF = file->private_data; |
| 850 | |
| 851 | if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) |
| 852 | return -ENOENT; |
| 853 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 854 | if(file->f_path.dentry == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | return -ENOENT; |
| 856 | |
Steve French | b66ac3e | 2006-04-23 01:54:50 +0000 | [diff] [blame] | 857 | rc = cifs_entry_is_dot(pfindEntry,pCifsF); |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 858 | /* skip . and .. since we added them first */ |
| 859 | if(rc != 0) |
| 860 | return 0; |
| 861 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 862 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | |
| 864 | qstring.name = scratch_buf; |
| 865 | rc = cifs_get_name_from_search_buf(&qstring,pfindEntry, |
| 866 | pCifsF->srch_inf.info_level, |
| 867 | pCifsF->srch_inf.unicode,cifs_sb, |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 868 | max_len, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | &inum /* returned */); |
| 870 | |
| 871 | if(rc) |
| 872 | return rc; |
| 873 | |
| 874 | rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry); |
| 875 | if((tmp_inode == NULL) || (tmp_dentry == NULL)) |
| 876 | return -ENOMEM; |
| 877 | |
| 878 | if(rc) { |
| 879 | /* inode created, we need to hash it with right inode number */ |
| 880 | if(inum != 0) { |
| 881 | /* BB fixme - hash the 2 32 quantities bits together if necessary BB */ |
| 882 | tmp_inode->i_ino = inum; |
| 883 | } |
| 884 | insert_inode_hash(tmp_inode); |
| 885 | } |
| 886 | |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 887 | /* we pass in rc below, indicating whether it is a new inode, |
| 888 | so we can figure out whether to invalidate the inode cached |
| 889 | data if the file has changed */ |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 890 | if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) |
Steve French | 966ca92 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 891 | unix_fill_in_inode(tmp_inode, |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 892 | (FILE_UNIX_INFO *)pfindEntry, |
| 893 | &obj_type, rc); |
| 894 | else if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) |
| 895 | fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */, |
| 896 | pfindEntry, &obj_type, rc); |
| 897 | else |
| 898 | fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc); |
Steve French | b835beb | 2006-09-06 22:02:22 +0000 | [diff] [blame] | 899 | |
| 900 | if(rc) /* new inode - needs to be tied to dentry */ { |
| 901 | d_instantiate(tmp_dentry, tmp_inode); |
| 902 | if(rc == 2) |
| 903 | d_rehash(tmp_dentry); |
| 904 | } |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 905 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | |
Steve French | dfb7533 | 2005-06-22 17:13:47 -0700 | [diff] [blame] | 907 | rc = filldir(direntry,qstring.name,qstring.len,file->f_pos, |
| 908 | tmp_inode->i_ino,obj_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | if(rc) { |
| 910 | cFYI(1,("filldir rc = %d",rc)); |
Steve French | 7ca85ba | 2006-10-30 21:42:57 +0000 | [diff] [blame] | 911 | /* we can not return filldir errors to the caller |
| 912 | since they are "normal" when the stat blocksize |
| 913 | is too small - we return remapped error instead */ |
| 914 | rc = -EOVERFLOW; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | } |
| 916 | |
| 917 | dput(tmp_dentry); |
| 918 | return rc; |
| 919 | } |
| 920 | |
| 921 | static int cifs_save_resume_key(const char *current_entry, |
| 922 | struct cifsFileInfo *cifsFile) |
| 923 | { |
| 924 | int rc = 0; |
| 925 | unsigned int len = 0; |
| 926 | __u16 level; |
| 927 | char * filename; |
| 928 | |
| 929 | if((cifsFile == NULL) || (current_entry == NULL)) |
| 930 | return -EINVAL; |
| 931 | |
| 932 | level = cifsFile->srch_inf.info_level; |
| 933 | |
| 934 | if(level == SMB_FIND_FILE_UNIX) { |
| 935 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; |
| 936 | |
| 937 | filename = &pFindData->FileName[0]; |
| 938 | if(cifsFile->srch_inf.unicode) { |
| 939 | len = cifs_unicode_bytelen(filename); |
| 940 | } else { |
| 941 | /* BB should we make this strnlen of PATH_MAX? */ |
| 942 | len = strnlen(filename, PATH_MAX); |
| 943 | } |
| 944 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; |
| 945 | } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { |
| 946 | FILE_DIRECTORY_INFO * pFindData = |
| 947 | (FILE_DIRECTORY_INFO *)current_entry; |
| 948 | filename = &pFindData->FileName[0]; |
| 949 | len = le32_to_cpu(pFindData->FileNameLength); |
| 950 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; |
| 951 | } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
| 952 | FILE_FULL_DIRECTORY_INFO * pFindData = |
| 953 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
| 954 | filename = &pFindData->FileName[0]; |
| 955 | len = le32_to_cpu(pFindData->FileNameLength); |
| 956 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; |
| 957 | } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
| 958 | SEARCH_ID_FULL_DIR_INFO * pFindData = |
| 959 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
| 960 | filename = &pFindData->FileName[0]; |
| 961 | len = le32_to_cpu(pFindData->FileNameLength); |
| 962 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; |
| 963 | } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
| 964 | FILE_BOTH_DIRECTORY_INFO * pFindData = |
| 965 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
| 966 | filename = &pFindData->FileName[0]; |
| 967 | len = le32_to_cpu(pFindData->FileNameLength); |
| 968 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 969 | } else if(level == SMB_FIND_FILE_INFO_STANDARD) { |
| 970 | FIND_FILE_STANDARD_INFO * pFindData = |
| 971 | (FIND_FILE_STANDARD_INFO *)current_entry; |
| 972 | filename = &pFindData->FileName[0]; |
| 973 | /* one byte length, no name conversion */ |
| 974 | len = (unsigned int)pFindData->FileNameLength; |
Steve French | 203cf2f | 2006-10-01 19:59:41 +0000 | [diff] [blame] | 975 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | } else { |
| 977 | cFYI(1,("Unknown findfirst level %d",level)); |
| 978 | return -EINVAL; |
| 979 | } |
| 980 | cifsFile->srch_inf.resume_name_len = len; |
| 981 | cifsFile->srch_inf.presume_name = filename; |
| 982 | return rc; |
| 983 | } |
| 984 | |
| 985 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) |
| 986 | { |
| 987 | int rc = 0; |
| 988 | int xid,i; |
| 989 | struct cifs_sb_info *cifs_sb; |
| 990 | struct cifsTconInfo *pTcon; |
| 991 | struct cifsFileInfo *cifsFile = NULL; |
| 992 | char * current_entry; |
| 993 | int num_to_fill = 0; |
| 994 | char * tmp_buf = NULL; |
| 995 | char * end_of_smb; |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 996 | int max_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | |
| 998 | xid = GetXid(); |
| 999 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 1000 | if(file->f_path.dentry == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | FreeXid(xid); |
| 1002 | return -EIO; |
| 1003 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 1005 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | pTcon = cifs_sb->tcon; |
| 1007 | if(pTcon == NULL) |
| 1008 | return -EINVAL; |
| 1009 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | switch ((int) file->f_pos) { |
| 1011 | case 0: |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 1012 | if (filldir(direntry, ".", 1, file->f_pos, |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 1013 | file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) { |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 1014 | cERROR(1, ("Filldir for current dir failed")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | rc = -ENOMEM; |
| 1016 | break; |
| 1017 | } |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 1018 | file->f_pos++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | case 1: |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 1020 | if (filldir(direntry, "..", 2, file->f_pos, |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 1021 | file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
Steve French | 26a21b9 | 2006-05-31 18:05:34 +0000 | [diff] [blame] | 1022 | cERROR(1, ("Filldir for parent dir failed")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | rc = -ENOMEM; |
| 1024 | break; |
| 1025 | } |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 1026 | file->f_pos++; |
| 1027 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | /* 1) If search is active, |
| 1029 | is in current search buffer? |
| 1030 | if it before then restart search |
| 1031 | if after then keep searching till find it */ |
| 1032 | |
| 1033 | if(file->private_data == NULL) { |
| 1034 | rc = initiate_cifs_search(xid,file); |
| 1035 | cFYI(1,("initiate cifs search rc %d",rc)); |
| 1036 | if(rc) { |
| 1037 | FreeXid(xid); |
| 1038 | return rc; |
| 1039 | } |
| 1040 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | if(file->private_data == NULL) { |
| 1042 | rc = -EINVAL; |
| 1043 | FreeXid(xid); |
| 1044 | return rc; |
| 1045 | } |
| 1046 | cifsFile = file->private_data; |
| 1047 | if (cifsFile->srch_inf.endOfSearch) { |
| 1048 | if(cifsFile->srch_inf.emptyDir) { |
| 1049 | cFYI(1, ("End of search, empty dir")); |
| 1050 | rc = 0; |
| 1051 | break; |
| 1052 | } |
| 1053 | } /* else { |
| 1054 | cifsFile->invalidHandle = TRUE; |
| 1055 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
| 1056 | } |
| 1057 | kfree(cifsFile->search_resume_name); |
| 1058 | cifsFile->search_resume_name = NULL; */ |
| 1059 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | rc = find_cifs_entry(xid,pTcon, file, |
| 1061 | ¤t_entry,&num_to_fill); |
| 1062 | if(rc) { |
| 1063 | cFYI(1,("fce error %d",rc)); |
| 1064 | goto rddir2_exit; |
| 1065 | } else if (current_entry != NULL) { |
| 1066 | cFYI(1,("entry %lld found",file->f_pos)); |
| 1067 | } else { |
| 1068 | cFYI(1,("could not find entry")); |
| 1069 | goto rddir2_exit; |
| 1070 | } |
| 1071 | cFYI(1,("loop through %d times filling dir for net buf %p", |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 1072 | num_to_fill,cifsFile->srch_inf.ntwrk_buf_start)); |
| 1073 | max_len = smbCalcSize((struct smb_hdr *) |
| 1074 | cifsFile->srch_inf.ntwrk_buf_start); |
| 1075 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; |
| 1076 | |
Steve French | 6a0b482 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 1077 | /* To be safe - for UCS to UTF-8 with strings loaded |
| 1078 | with the rare long characters alloc more to account for |
| 1079 | such multibyte target UTF-8 characters. cifs_unicode.c, |
| 1080 | which actually does the conversion, has the same limit */ |
| 1081 | tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | for(i=0;(i<num_to_fill) && (rc == 0);i++) { |
| 1083 | if(current_entry == NULL) { |
| 1084 | /* evaluate whether this case is an error */ |
| 1085 | cERROR(1,("past end of SMB num to fill %d i %d", |
| 1086 | num_to_fill, i)); |
| 1087 | break; |
| 1088 | } |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 1089 | /* if buggy server returns . and .. late do |
| 1090 | we want to check for that here? */ |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 1091 | rc = cifs_filldir(current_entry, file, |
| 1092 | filldir, direntry, tmp_buf, max_len); |
Steve French | 7ca85ba | 2006-10-30 21:42:57 +0000 | [diff] [blame] | 1093 | if(rc == -EOVERFLOW) { |
| 1094 | rc = 0; |
| 1095 | break; |
| 1096 | } |
| 1097 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | file->f_pos++; |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 1099 | if(file->f_pos == |
| 1100 | cifsFile->srch_inf.index_of_last_entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | cFYI(1,("last entry in buf at pos %lld %s", |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 1102 | file->f_pos,tmp_buf)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | cifs_save_resume_key(current_entry,cifsFile); |
| 1104 | break; |
| 1105 | } else |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 1106 | current_entry = |
| 1107 | nxt_dir_entry(current_entry, end_of_smb, |
| 1108 | cifsFile->srch_inf.info_level); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | } |
| 1110 | kfree(tmp_buf); |
| 1111 | break; |
| 1112 | } /* end switch */ |
| 1113 | |
| 1114 | rddir2_exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | FreeXid(xid); |
| 1116 | return rc; |
| 1117 | } |