Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/readdir.c |
| 3 | * |
| 4 | * Directory search handling |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 5 | * |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 6 | * Copyright (C) International Business Machines Corp., 2004, 2008 |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 7 | * Copyright (C) Red Hat, Inc., 2011 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * Author(s): Steve French (sfrench@us.ibm.com) |
| 9 | * |
| 10 | * This library is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU Lesser General Public License as published |
| 12 | * by the Free Software Foundation; either version 2.1 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This library is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 18 | * the GNU Lesser General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU Lesser General Public License |
| 21 | * along with this library; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 23 | */ |
| 24 | #include <linux/fs.h> |
Dave Kleikamp | 273d81d | 2006-06-01 19:41:23 +0000 | [diff] [blame] | 25 | #include <linux/pagemap.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 26 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/stat.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include "cifspdu.h" |
| 29 | #include "cifsglob.h" |
| 30 | #include "cifsproto.h" |
| 31 | #include "cifs_unicode.h" |
| 32 | #include "cifs_debug.h" |
| 33 | #include "cifs_fs_sb.h" |
| 34 | #include "cifsfs.h" |
| 35 | |
Jeff Layton | f588416 | 2009-04-30 07:18:00 -0400 | [diff] [blame] | 36 | /* |
| 37 | * To be safe - for UCS to UTF-8 with strings loaded with the rare long |
| 38 | * characters alloc more to account for such multibyte target UTF-8 |
| 39 | * characters. |
| 40 | */ |
| 41 | #define UNICODE_NAME_MAX ((4 * NAME_MAX) + 2) |
| 42 | |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 43 | #ifdef CONFIG_CIFS_DEBUG2 |
| 44 | static void dump_cifs_file_struct(struct file *file, char *label) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | { |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 46 | struct cifsFileInfo *cf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 48 | if (file) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | cf = file->private_data; |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 50 | if (cf == NULL) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 51 | cifs_dbg(FYI, "empty cifs private file data\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | return; |
| 53 | } |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 54 | if (cf->invalidHandle) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 55 | cifs_dbg(FYI, "invalid handle\n"); |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 56 | if (cf->srch_inf.endOfSearch) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 57 | cifs_dbg(FYI, "end of search\n"); |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 58 | if (cf->srch_inf.emptyDir) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 59 | cifs_dbg(FYI, "empty dir\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | } |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 61 | } |
Steve French | 90c81e0 | 2008-02-12 20:32:36 +0000 | [diff] [blame] | 62 | #else |
| 63 | static inline void dump_cifs_file_struct(struct file *file, char *label) |
| 64 | { |
| 65 | } |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 66 | #endif /* DEBUG2 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 68 | /* |
Jeff Layton | eb1b3fa | 2012-12-03 06:05:37 -0500 | [diff] [blame] | 69 | * Attempt to preload the dcache with the results from the FIND_FIRST/NEXT |
| 70 | * |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 71 | * Find the dentry that matches "name". If there isn't one, create one. If it's |
| 72 | * a negative dentry or the uniqueid changed, then drop it and recreate it. |
| 73 | */ |
Jeff Layton | eb1b3fa | 2012-12-03 06:05:37 -0500 | [diff] [blame] | 74 | static void |
| 75 | cifs_prime_dcache(struct dentry *parent, struct qstr *name, |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 76 | struct cifs_fattr *fattr) |
| 77 | { |
| 78 | struct dentry *dentry, *alias; |
| 79 | struct inode *inode; |
| 80 | struct super_block *sb = parent->d_inode->i_sb; |
Jeff Layton | 2f2591a | 2012-12-18 06:35:10 -0500 | [diff] [blame] | 81 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 82 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 83 | cifs_dbg(FYI, "%s: for %s\n", __func__, name->name); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 84 | |
Al Viro | 4f522a2 | 2013-02-11 23:20:37 -0500 | [diff] [blame] | 85 | dentry = d_hash_and_lookup(parent, name); |
| 86 | if (unlikely(IS_ERR(dentry))) |
| 87 | return; |
Jeff Layton | 05507fa | 2010-02-05 13:30:36 -0500 | [diff] [blame] | 88 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 89 | if (dentry) { |
Al Viro | 0903a0c | 2012-11-29 22:11:06 -0500 | [diff] [blame] | 90 | int err; |
Jeff Layton | eb1b3fa | 2012-12-03 06:05:37 -0500 | [diff] [blame] | 91 | |
Jeff Layton | cd60042 | 2012-07-06 07:09:42 -0400 | [diff] [blame] | 92 | inode = dentry->d_inode; |
Jeff Layton | 2f2591a | 2012-12-18 06:35:10 -0500 | [diff] [blame] | 93 | if (inode) { |
| 94 | /* |
| 95 | * If we're generating inode numbers, then we don't |
| 96 | * want to clobber the existing one with the one that |
| 97 | * the readdir code created. |
| 98 | */ |
| 99 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) |
| 100 | fattr->cf_uniqueid = CIFS_I(inode)->uniqueid; |
| 101 | |
| 102 | /* update inode in place if i_ino didn't change */ |
| 103 | if (CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) { |
| 104 | cifs_fattr_to_inode(inode, fattr); |
| 105 | goto out; |
| 106 | } |
Jeff Layton | cd60042 | 2012-07-06 07:09:42 -0400 | [diff] [blame] | 107 | } |
Al Viro | 0903a0c | 2012-11-29 22:11:06 -0500 | [diff] [blame] | 108 | err = d_invalidate(dentry); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 109 | dput(dentry); |
Al Viro | 0903a0c | 2012-11-29 22:11:06 -0500 | [diff] [blame] | 110 | if (err) |
Jeff Layton | eb1b3fa | 2012-12-03 06:05:37 -0500 | [diff] [blame] | 111 | return; |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 112 | } |
| 113 | |
Jeff Layton | 757c4f6 | 2013-08-07 10:29:08 -0400 | [diff] [blame] | 114 | /* |
| 115 | * If we know that the inode will need to be revalidated immediately, |
| 116 | * then don't create a new dentry for it. We'll end up doing an on |
| 117 | * the wire call either way and this spares us an invalidation. |
| 118 | */ |
| 119 | if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) |
| 120 | return; |
| 121 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 122 | dentry = d_alloc(parent, name); |
Jeff Layton | eb1b3fa | 2012-12-03 06:05:37 -0500 | [diff] [blame] | 123 | if (!dentry) |
| 124 | return; |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 125 | |
| 126 | inode = cifs_iget(sb, fattr); |
Jeff Layton | eb1b3fa | 2012-12-03 06:05:37 -0500 | [diff] [blame] | 127 | if (!inode) |
| 128 | goto out; |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 129 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 130 | alias = d_materialise_unique(dentry, inode); |
Jeff Layton | eb1b3fa | 2012-12-03 06:05:37 -0500 | [diff] [blame] | 131 | if (alias && !IS_ERR(alias)) |
| 132 | dput(alias); |
| 133 | out: |
| 134 | dput(dentry); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 135 | } |
| 136 | |
Jeff Layton | 2a2c41c | 2013-06-25 01:32:17 -0500 | [diff] [blame] | 137 | /* |
| 138 | * Is it possible that this directory might turn out to be a DFS referral |
| 139 | * once we go to try and use it? |
| 140 | */ |
| 141 | static bool |
| 142 | cifs_dfs_is_possible(struct cifs_sb_info *cifs_sb) |
| 143 | { |
| 144 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 145 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
| 146 | |
| 147 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) |
| 148 | return true; |
| 149 | #endif |
| 150 | return false; |
| 151 | } |
| 152 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 153 | static void |
| 154 | cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | { |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 156 | fattr->cf_uid = cifs_sb->mnt_uid; |
| 157 | fattr->cf_gid = cifs_sb->mnt_gid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 159 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { |
| 160 | fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; |
| 161 | fattr->cf_dtype = DT_DIR; |
Jeff Layton | 2a2c41c | 2013-06-25 01:32:17 -0500 | [diff] [blame] | 162 | /* |
| 163 | * Windows CIFS servers generally make DFS referrals look |
| 164 | * like directories in FIND_* responses with the reparse |
| 165 | * attribute flag also set (since DFS junctions are |
| 166 | * reparse points). We must revalidate at least these |
| 167 | * directory inodes before trying to use them (if |
| 168 | * they are DFS we will get PATH_NOT_COVERED back |
| 169 | * when queried directly and can then try to connect |
| 170 | * to the DFS target) |
| 171 | */ |
| 172 | if (cifs_dfs_is_possible(cifs_sb) && |
| 173 | (fattr->cf_cifsattrs & ATTR_REPARSE)) |
| 174 | fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; |
Pavel Shilovsky | b42bf88 | 2013-08-14 19:25:21 +0400 | [diff] [blame] | 175 | } else if (fattr->cf_cifsattrs & ATTR_REPARSE) { |
| 176 | fattr->cf_mode = S_IFLNK; |
| 177 | fattr->cf_dtype = DT_LNK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | } else { |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 179 | fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; |
| 180 | fattr->cf_dtype = DT_REG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | } |
| 182 | |
Jim McDonough | 74d290d | 2013-09-21 10:36:10 -0500 | [diff] [blame] | 183 | /* non-unix readdir doesn't provide nlink */ |
| 184 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; |
| 185 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 186 | if (fattr->cf_cifsattrs & ATTR_READONLY) |
| 187 | fattr->cf_mode &= ~S_IWUGO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
Jeff Layton | ccb5c00 | 2012-11-25 08:00:40 -0500 | [diff] [blame] | 189 | /* |
| 190 | * We of course don't get ACL info in FIND_FIRST/NEXT results, so |
| 191 | * mark it for revalidation so that "ls -l" will look right. It might |
| 192 | * be super-slow, but if we don't do this then the ownership of files |
| 193 | * may look wrong since the inodes may not have timed out by the time |
| 194 | * "ls" does a stat() call on them. |
| 195 | */ |
| 196 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) |
| 197 | fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; |
| 198 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 199 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL && |
| 200 | fattr->cf_cifsattrs & ATTR_SYSTEM) { |
| 201 | if (fattr->cf_eof == 0) { |
| 202 | fattr->cf_mode &= ~S_IFMT; |
| 203 | fattr->cf_mode |= S_IFIFO; |
| 204 | fattr->cf_dtype = DT_FIFO; |
Steve French | 3020a1f | 2005-11-18 11:31:10 -0800 | [diff] [blame] | 205 | } else { |
Jeff Layton | 4468eb3 | 2008-05-22 09:31:40 -0400 | [diff] [blame] | 206 | /* |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 207 | * trying to get the type and mode via SFU can be slow, |
| 208 | * so just call those regular files for now, and mark |
| 209 | * for reval |
Jeff Layton | 4468eb3 | 2008-05-22 09:31:40 -0400 | [diff] [blame] | 210 | */ |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 211 | fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; |
Jeff Layton | 4468eb3 | 2008-05-22 09:31:40 -0400 | [diff] [blame] | 212 | } |
| 213 | } |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 214 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
Shirish Pargaonkar | c052e2b | 2012-09-28 12:21:14 -0500 | [diff] [blame] | 216 | void |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 217 | cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info, |
| 218 | struct cifs_sb_info *cifs_sb) |
| 219 | { |
| 220 | memset(fattr, 0, sizeof(*fattr)); |
| 221 | fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes); |
| 222 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); |
| 223 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); |
Jeff Layton | 20054bd | 2011-01-07 11:30:27 -0500 | [diff] [blame] | 224 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 225 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); |
| 226 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); |
| 227 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 229 | cifs_fill_common_info(fattr, cifs_sb); |
| 230 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | |
Steve French | 15dd478 | 2009-09-25 02:24:45 +0000 | [diff] [blame] | 232 | static void |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 233 | cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info, |
| 234 | struct cifs_sb_info *cifs_sb) |
| 235 | { |
Jeff Layton | 0d424ad | 2010-09-20 16:01:35 -0700 | [diff] [blame] | 236 | int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 238 | memset(fattr, 0, sizeof(*fattr)); |
| 239 | fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate, |
| 240 | info->LastAccessTime, offset); |
| 241 | fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate, |
| 242 | info->LastWriteTime, offset); |
| 243 | fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate, |
| 244 | info->LastWriteTime, offset); |
Steve French | f3f6ec4 | 2006-01-08 20:12:58 -0800 | [diff] [blame] | 245 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 246 | fattr->cf_cifsattrs = le16_to_cpu(info->Attributes); |
| 247 | fattr->cf_bytes = le32_to_cpu(info->AllocationSize); |
| 248 | fattr->cf_eof = le32_to_cpu(info->DataSize); |
Dave Kleikamp | 273d81d | 2006-06-01 19:41:23 +0000 | [diff] [blame] | 249 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 250 | cifs_fill_common_info(fattr, cifs_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | } |
| 252 | |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 253 | /* BB eventually need to add the following helper function to |
| 254 | resolve NT_STATUS_STOPPED_ON_SYMLINK return code when |
| 255 | we try to do FindFirst on (NTFS) directory symlinks */ |
| 256 | /* |
| 257 | int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb, |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 258 | unsigned int xid) |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 259 | { |
| 260 | __u16 fid; |
| 261 | int len; |
| 262 | int oplock = 0; |
| 263 | int rc; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 264 | struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb); |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 265 | char *tmpbuffer; |
| 266 | |
| 267 | rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ, |
| 268 | OPEN_REPARSE_POINT, &fid, &oplock, NULL, |
| 269 | cifs_sb->local_nls, |
| 270 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 271 | if (!rc) { |
| 272 | tmpbuffer = kmalloc(maxpath); |
| 273 | rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path, |
| 274 | tmpbuffer, |
| 275 | maxpath -1, |
| 276 | fid, |
| 277 | cifs_sb->local_nls); |
| 278 | if (CIFSSMBClose(xid, ptcon, fid)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 279 | cifs_dbg(FYI, "Error closing temporary reparsepoint open\n"); |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 280 | } |
| 281 | } |
| 282 | } |
| 283 | */ |
| 284 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 285 | static int |
| 286 | initiate_cifs_search(const unsigned int xid, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | { |
Shirish Pargaonkar | 2608bee | 2012-05-15 10:19:16 -0500 | [diff] [blame] | 288 | __u16 search_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | int rc = 0; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 290 | char *full_path = NULL; |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 291 | struct cifsFileInfo *cifsFile; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 292 | struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
Jeff Layton | 59c55ba | 2010-11-12 06:30:29 -0500 | [diff] [blame] | 293 | struct tcon_link *tlink = NULL; |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 294 | struct cifs_tcon *tcon; |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 295 | struct TCP_Server_Info *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 297 | if (file->private_data == NULL) { |
Jeff Layton | 59c55ba | 2010-11-12 06:30:29 -0500 | [diff] [blame] | 298 | tlink = cifs_sb_tlink(cifs_sb); |
| 299 | if (IS_ERR(tlink)) |
| 300 | return PTR_ERR(tlink); |
| 301 | |
| 302 | cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); |
| 303 | if (cifsFile == NULL) { |
| 304 | rc = -ENOMEM; |
| 305 | goto error_exit; |
| 306 | } |
| 307 | file->private_data = cifsFile; |
| 308 | cifsFile->tlink = cifs_get_tlink(tlink); |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 309 | tcon = tlink_tcon(tlink); |
Jeff Layton | 59c55ba | 2010-11-12 06:30:29 -0500 | [diff] [blame] | 310 | } else { |
| 311 | cifsFile = file->private_data; |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 312 | tcon = tlink_tcon(cifsFile->tlink); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 313 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 315 | server = tcon->ses->server; |
| 316 | |
| 317 | if (!server->ops->query_dir_first) { |
| 318 | rc = -ENOSYS; |
| 319 | goto error_exit; |
| 320 | } |
| 321 | |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 322 | cifsFile->invalidHandle = true; |
| 323 | cifsFile->srch_inf.endOfSearch = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 325 | full_path = build_path_from_dentry(file->f_path.dentry); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 326 | if (full_path == NULL) { |
| 327 | rc = -ENOMEM; |
| 328 | goto error_exit; |
| 329 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 331 | cifs_dbg(FYI, "Full path: %s start at: %lld\n", full_path, file->f_pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
Steve French | 75cf6bd | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 333 | ffirst_retry: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | /* test for Unix extensions */ |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 335 | /* but now check for them on the share/mount not on the SMB session */ |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 336 | /* if (cap_unix(tcon->ses) { */ |
| 337 | if (tcon->unix_ext) |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 338 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 339 | else if ((tcon->ses->capabilities & |
| 340 | tcon->ses->server->vals->cap_nt_find) == 0) { |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 341 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
| 343 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; |
| 344 | } else /* not srvinos - BB fixme add check for backlevel? */ { |
| 345 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; |
| 346 | } |
| 347 | |
Shirish Pargaonkar | 2608bee | 2012-05-15 10:19:16 -0500 | [diff] [blame] | 348 | search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME; |
| 349 | if (backup_cred(cifs_sb)) |
| 350 | search_flags |= CIFS_SEARCH_BACKUP_SEARCH; |
| 351 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 352 | rc = server->ops->query_dir_first(xid, tcon, full_path, cifs_sb, |
| 353 | &cifsFile->fid, search_flags, |
| 354 | &cifsFile->srch_inf); |
| 355 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 356 | if (rc == 0) |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 357 | cifsFile->invalidHandle = false; |
Steve French | e836f01 | 2009-05-01 16:20:35 +0000 | [diff] [blame] | 358 | /* BB add following call to handle readdir on new NTFS symlink errors |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 359 | else if STATUS_STOPPED_ON_SYMLINK |
| 360 | call get_symlink_reparse_path and retry with new path */ |
| 361 | else if ((rc == -EOPNOTSUPP) && |
Steve French | 75cf6bd | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 362 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
| 363 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; |
| 364 | goto ffirst_retry; |
| 365 | } |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 366 | error_exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | kfree(full_path); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 368 | cifs_put_tlink(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | return rc; |
| 370 | } |
| 371 | |
| 372 | /* return length of unicode string in bytes */ |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 373 | static int cifs_unicode_bytelen(const char *str) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | { |
| 375 | int len; |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 376 | const __le16 *ustr = (const __le16 *)str; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 378 | for (len = 0; len <= PATH_MAX; len++) { |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 379 | if (ustr[len] == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | return len << 1; |
| 381 | } |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 382 | cifs_dbg(FYI, "Unicode string longer than PATH_MAX found\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | return len << 1; |
| 384 | } |
| 385 | |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 386 | 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] | 387 | { |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 388 | char *new_entry; |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 389 | FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 391 | if (level == SMB_FIND_FILE_INFO_STANDARD) { |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 392 | FIND_FILE_STANDARD_INFO *pfData; |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 393 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; |
| 394 | |
| 395 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + |
| 396 | pfData->FileNameLength; |
| 397 | } else |
| 398 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 399 | cifs_dbg(FYI, "new entry %p old entry %p\n", new_entry, old_entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | /* validate that new_entry is not past end of SMB */ |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 401 | if (new_entry >= end_of_smb) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 402 | cifs_dbg(VFS, "search entry %p began after end of SMB %p old entry %p\n", |
| 403 | new_entry, end_of_smb, old_entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | return NULL; |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 405 | } else if (((level == SMB_FIND_FILE_INFO_STANDARD) && |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 406 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) |
| 407 | || ((level != SMB_FIND_FILE_INFO_STANDARD) && |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 408 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 409 | cifs_dbg(VFS, "search entry %p extends after end of SMB %p\n", |
| 410 | new_entry, end_of_smb); |
Steve French | 09d1db5 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 411 | return NULL; |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 412 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | return new_entry; |
| 414 | |
| 415 | } |
| 416 | |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 417 | struct cifs_dirent { |
| 418 | const char *name; |
| 419 | size_t namelen; |
| 420 | u32 resume_key; |
| 421 | u64 ino; |
| 422 | }; |
| 423 | |
| 424 | static void cifs_fill_dirent_unix(struct cifs_dirent *de, |
| 425 | const FILE_UNIX_INFO *info, bool is_unicode) |
| 426 | { |
| 427 | de->name = &info->FileName[0]; |
| 428 | if (is_unicode) |
| 429 | de->namelen = cifs_unicode_bytelen(de->name); |
| 430 | else |
| 431 | de->namelen = strnlen(de->name, PATH_MAX); |
| 432 | de->resume_key = info->ResumeKey; |
| 433 | de->ino = le64_to_cpu(info->basic.UniqueId); |
| 434 | } |
| 435 | |
| 436 | static void cifs_fill_dirent_dir(struct cifs_dirent *de, |
| 437 | const FILE_DIRECTORY_INFO *info) |
| 438 | { |
| 439 | de->name = &info->FileName[0]; |
| 440 | de->namelen = le32_to_cpu(info->FileNameLength); |
| 441 | de->resume_key = info->FileIndex; |
| 442 | } |
| 443 | |
| 444 | static void cifs_fill_dirent_full(struct cifs_dirent *de, |
| 445 | const FILE_FULL_DIRECTORY_INFO *info) |
| 446 | { |
| 447 | de->name = &info->FileName[0]; |
| 448 | de->namelen = le32_to_cpu(info->FileNameLength); |
| 449 | de->resume_key = info->FileIndex; |
| 450 | } |
| 451 | |
| 452 | static void cifs_fill_dirent_search(struct cifs_dirent *de, |
| 453 | const SEARCH_ID_FULL_DIR_INFO *info) |
| 454 | { |
| 455 | de->name = &info->FileName[0]; |
| 456 | de->namelen = le32_to_cpu(info->FileNameLength); |
| 457 | de->resume_key = info->FileIndex; |
| 458 | de->ino = le64_to_cpu(info->UniqueId); |
| 459 | } |
| 460 | |
| 461 | static void cifs_fill_dirent_both(struct cifs_dirent *de, |
| 462 | const FILE_BOTH_DIRECTORY_INFO *info) |
| 463 | { |
| 464 | de->name = &info->FileName[0]; |
| 465 | de->namelen = le32_to_cpu(info->FileNameLength); |
| 466 | de->resume_key = info->FileIndex; |
| 467 | } |
| 468 | |
| 469 | static void cifs_fill_dirent_std(struct cifs_dirent *de, |
| 470 | const FIND_FILE_STANDARD_INFO *info) |
| 471 | { |
| 472 | de->name = &info->FileName[0]; |
| 473 | /* one byte length, no endianess conversion */ |
| 474 | de->namelen = info->FileNameLength; |
| 475 | de->resume_key = info->ResumeKey; |
| 476 | } |
| 477 | |
| 478 | static int cifs_fill_dirent(struct cifs_dirent *de, const void *info, |
| 479 | u16 level, bool is_unicode) |
| 480 | { |
| 481 | memset(de, 0, sizeof(*de)); |
| 482 | |
| 483 | switch (level) { |
| 484 | case SMB_FIND_FILE_UNIX: |
| 485 | cifs_fill_dirent_unix(de, info, is_unicode); |
| 486 | break; |
| 487 | case SMB_FIND_FILE_DIRECTORY_INFO: |
| 488 | cifs_fill_dirent_dir(de, info); |
| 489 | break; |
| 490 | case SMB_FIND_FILE_FULL_DIRECTORY_INFO: |
| 491 | cifs_fill_dirent_full(de, info); |
| 492 | break; |
| 493 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: |
| 494 | cifs_fill_dirent_search(de, info); |
| 495 | break; |
| 496 | case SMB_FIND_FILE_BOTH_DIRECTORY_INFO: |
| 497 | cifs_fill_dirent_both(de, info); |
| 498 | break; |
| 499 | case SMB_FIND_FILE_INFO_STANDARD: |
| 500 | cifs_fill_dirent_std(de, info); |
| 501 | break; |
| 502 | default: |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 503 | cifs_dbg(FYI, "Unknown findfirst level %d\n", level); |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 504 | return -EINVAL; |
| 505 | } |
| 506 | |
| 507 | return 0; |
| 508 | } |
| 509 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | #define UNICODE_DOT cpu_to_le16(0x2e) |
| 511 | |
| 512 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 513 | static int cifs_entry_is_dot(struct cifs_dirent *de, bool is_unicode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | { |
| 515 | int rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 517 | if (!de->name) |
| 518 | return 0; |
| 519 | |
| 520 | if (is_unicode) { |
| 521 | __le16 *ufilename = (__le16 *)de->name; |
| 522 | if (de->namelen == 2) { |
| 523 | /* check for . */ |
| 524 | if (ufilename[0] == UNICODE_DOT) |
| 525 | rc = 1; |
| 526 | } else if (de->namelen == 4) { |
| 527 | /* check for .. */ |
| 528 | if (ufilename[0] == UNICODE_DOT && |
| 529 | ufilename[1] == UNICODE_DOT) |
| 530 | rc = 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | } |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 532 | } else /* ASCII */ { |
| 533 | if (de->namelen == 1) { |
| 534 | if (de->name[0] == '.') |
| 535 | rc = 1; |
| 536 | } else if (de->namelen == 2) { |
| 537 | if (de->name[0] == '.' && de->name[1] == '.') |
| 538 | rc = 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | } |
| 540 | } |
| 541 | |
| 542 | return rc; |
| 543 | } |
| 544 | |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 545 | /* Check if directory that we are searching has changed so we can decide |
| 546 | whether we can use the cached search results from the previous search */ |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 547 | static int is_dir_changed(struct file *file) |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 548 | { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 549 | struct inode *inode = file_inode(file); |
Christoph Hellwig | c33f8d3 | 2007-04-02 18:47:20 +0000 | [diff] [blame] | 550 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 551 | |
Christoph Hellwig | c33f8d3 | 2007-04-02 18:47:20 +0000 | [diff] [blame] | 552 | if (cifsInfo->time == 0) |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 553 | return 1; /* directory was changed, perhaps due to unlink */ |
| 554 | else |
| 555 | return 0; |
| 556 | |
| 557 | } |
| 558 | |
Steve French | 0752f15 | 2008-10-07 20:03:33 +0000 | [diff] [blame] | 559 | static int cifs_save_resume_key(const char *current_entry, |
Christoph Hellwig | eaf35b1 | 2011-07-16 15:24:37 -0400 | [diff] [blame] | 560 | struct cifsFileInfo *file_info) |
Steve French | 0752f15 | 2008-10-07 20:03:33 +0000 | [diff] [blame] | 561 | { |
Christoph Hellwig | eaf35b1 | 2011-07-16 15:24:37 -0400 | [diff] [blame] | 562 | struct cifs_dirent de; |
| 563 | int rc; |
Steve French | 0752f15 | 2008-10-07 20:03:33 +0000 | [diff] [blame] | 564 | |
Christoph Hellwig | eaf35b1 | 2011-07-16 15:24:37 -0400 | [diff] [blame] | 565 | rc = cifs_fill_dirent(&de, current_entry, file_info->srch_inf.info_level, |
| 566 | file_info->srch_inf.unicode); |
| 567 | if (!rc) { |
| 568 | file_info->srch_inf.presume_name = de.name; |
| 569 | file_info->srch_inf.resume_name_len = de.namelen; |
| 570 | file_info->srch_inf.resume_key = de.resume_key; |
Steve French | 0752f15 | 2008-10-07 20:03:33 +0000 | [diff] [blame] | 571 | } |
Steve French | 0752f15 | 2008-10-07 20:03:33 +0000 | [diff] [blame] | 572 | return rc; |
| 573 | } |
| 574 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 575 | /* |
| 576 | * Find the corresponding entry in the search. Note that the SMB server returns |
| 577 | * search entries for . and .. which complicates logic here if we choose to |
| 578 | * parse for them and we do not assume that they are located in the findfirst |
| 579 | * return buffer. We start counting in the buffer with entry 2 and increment for |
| 580 | * every entry (do not increment for . or .. entry). |
| 581 | */ |
| 582 | static int |
Al Viro | be4ccdc | 2013-05-22 16:17:25 -0400 | [diff] [blame] | 583 | find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, loff_t pos, |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 584 | struct file *file, char **current_entry, int *num_to_ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | { |
Shirish Pargaonkar | 2608bee | 2012-05-15 10:19:16 -0500 | [diff] [blame] | 586 | __u16 search_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | int rc = 0; |
| 588 | int pos_in_buf = 0; |
| 589 | loff_t first_entry_in_buffer; |
Al Viro | be4ccdc | 2013-05-22 16:17:25 -0400 | [diff] [blame] | 590 | loff_t index_to_find = pos; |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 591 | struct cifsFileInfo *cfile = file->private_data; |
Shirish Pargaonkar | 2608bee | 2012-05-15 10:19:16 -0500 | [diff] [blame] | 592 | struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 593 | struct TCP_Server_Info *server = tcon->ses->server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | /* check if index in the buffer */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 595 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 596 | if (!server->ops->query_dir_first || !server->ops->query_dir_next) |
| 597 | return -ENOSYS; |
| 598 | |
| 599 | if ((cfile == NULL) || (current_entry == NULL) || (num_to_ret == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | return -ENOENT; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 601 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 602 | *current_entry = NULL; |
| 603 | first_entry_in_buffer = cfile->srch_inf.index_of_last_entry - |
| 604 | cfile->srch_inf.entries_in_buffer; |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 605 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 606 | /* |
| 607 | * If first entry in buf is zero then is first buffer |
| 608 | * in search response data which means it is likely . and .. |
| 609 | * will be in this buffer, although some servers do not return |
| 610 | * . and .. for the root of a drive and for those we need |
| 611 | * to start two entries earlier. |
| 612 | */ |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 613 | |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 614 | dump_cifs_file_struct(file, "In fce "); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 615 | if (((index_to_find < cfile->srch_inf.index_of_last_entry) && |
| 616 | is_dir_changed(file)) || (index_to_find < first_entry_in_buffer)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | /* close and restart search */ |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 618 | cifs_dbg(FYI, "search backing up - close and restart search\n"); |
Jeff Layton | 4477288 | 2010-10-15 15:34:03 -0400 | [diff] [blame] | 619 | spin_lock(&cifs_file_list_lock); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 620 | if (!cfile->srch_inf.endOfSearch && !cfile->invalidHandle) { |
| 621 | cfile->invalidHandle = true; |
Jeff Layton | 4477288 | 2010-10-15 15:34:03 -0400 | [diff] [blame] | 622 | spin_unlock(&cifs_file_list_lock); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 623 | if (server->ops->close) |
| 624 | server->ops->close(xid, tcon, &cfile->fid); |
Steve French | ddb4cbf | 2008-11-20 20:00:44 +0000 | [diff] [blame] | 625 | } else |
Jeff Layton | 4477288 | 2010-10-15 15:34:03 -0400 | [diff] [blame] | 626 | spin_unlock(&cifs_file_list_lock); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 627 | if (cfile->srch_inf.ntwrk_buf_start) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 628 | cifs_dbg(FYI, "freeing SMB ff cache buf on search rewind\n"); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 629 | if (cfile->srch_inf.smallBuf) |
| 630 | cifs_small_buf_release(cfile->srch_inf. |
Steve French | d47d7c1 | 2006-02-28 03:45:48 +0000 | [diff] [blame] | 631 | ntwrk_buf_start); |
| 632 | else |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 633 | cifs_buf_release(cfile->srch_inf. |
Steve French | d47d7c1 | 2006-02-28 03:45:48 +0000 | [diff] [blame] | 634 | ntwrk_buf_start); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 635 | cfile->srch_inf.ntwrk_buf_start = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | } |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 637 | rc = initiate_cifs_search(xid, file); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 638 | if (rc) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 639 | cifs_dbg(FYI, "error %d reinitiating a search on rewind\n", |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 640 | rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | return rc; |
| 642 | } |
Jeff Layton | 7023676 | 2011-12-01 20:23:34 -0500 | [diff] [blame] | 643 | /* FindFirst/Next set last_entry to NULL on malformed reply */ |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 644 | if (cfile->srch_inf.last_entry) |
| 645 | cifs_save_resume_key(cfile->srch_inf.last_entry, cfile); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | } |
| 647 | |
Shirish Pargaonkar | 2608bee | 2012-05-15 10:19:16 -0500 | [diff] [blame] | 648 | search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME; |
| 649 | if (backup_cred(cifs_sb)) |
| 650 | search_flags |= CIFS_SEARCH_BACKUP_SEARCH; |
| 651 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 652 | while ((index_to_find >= cfile->srch_inf.index_of_last_entry) && |
| 653 | (rc == 0) && !cfile->srch_inf.endOfSearch) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 654 | cifs_dbg(FYI, "calling findnext2\n"); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 655 | rc = server->ops->query_dir_next(xid, tcon, &cfile->fid, |
| 656 | search_flags, |
| 657 | &cfile->srch_inf); |
Jeff Layton | 7023676 | 2011-12-01 20:23:34 -0500 | [diff] [blame] | 658 | /* FindFirst/Next set last_entry to NULL on malformed reply */ |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 659 | if (cfile->srch_inf.last_entry) |
| 660 | cifs_save_resume_key(cfile->srch_inf.last_entry, cfile); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 661 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | return -ENOENT; |
| 663 | } |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 664 | if (index_to_find < cfile->srch_inf.index_of_last_entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | /* we found the buffer that contains the entry */ |
| 666 | /* scan and find it */ |
| 667 | int i; |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 668 | char *cur_ent; |
| 669 | char *end_of_smb = cfile->srch_inf.ntwrk_buf_start + |
| 670 | server->ops->calc_smb_size( |
| 671 | cfile->srch_inf.ntwrk_buf_start); |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 672 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 673 | cur_ent = cfile->srch_inf.srch_entries_start; |
| 674 | first_entry_in_buffer = cfile->srch_inf.index_of_last_entry |
| 675 | - cfile->srch_inf.entries_in_buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | pos_in_buf = index_to_find - first_entry_in_buffer; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 677 | cifs_dbg(FYI, "found entry - pos_in_buf %d\n", pos_in_buf); |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 678 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 679 | for (i = 0; (i < (pos_in_buf)) && (cur_ent != NULL); i++) { |
Steve French | dfb7533 | 2005-06-22 17:13:47 -0700 | [diff] [blame] | 680 | /* go entry by entry figuring out which is first */ |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 681 | cur_ent = nxt_dir_entry(cur_ent, end_of_smb, |
| 682 | cfile->srch_inf.info_level); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | } |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 684 | if ((cur_ent == NULL) && (i < pos_in_buf)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | /* BB fixme - check if we should flag this error */ |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 686 | cifs_dbg(VFS, "reached end of buf searching for pos in buf %d index to find %lld rc %d\n", |
| 687 | pos_in_buf, index_to_find, rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | } |
| 689 | rc = 0; |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 690 | *current_entry = cur_ent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | } else { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 692 | cifs_dbg(FYI, "index not in buffer - could not findnext into it\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | return 0; |
| 694 | } |
| 695 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 696 | if (pos_in_buf >= cfile->srch_inf.entries_in_buffer) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 697 | cifs_dbg(FYI, "can not return entries pos_in_buf beyond last\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | *num_to_ret = 0; |
| 699 | } else |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 700 | *num_to_ret = cfile->srch_inf.entries_in_buffer - pos_in_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | |
| 702 | return rc; |
| 703 | } |
| 704 | |
Al Viro | be4ccdc | 2013-05-22 16:17:25 -0400 | [diff] [blame] | 705 | static int cifs_filldir(char *find_entry, struct file *file, |
| 706 | struct dir_context *ctx, |
| 707 | char *scratch_buf, unsigned int max_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | { |
Christoph Hellwig | 9feed6f | 2011-07-16 15:23:49 -0400 | [diff] [blame] | 709 | struct cifsFileInfo *file_info = file->private_data; |
| 710 | struct super_block *sb = file->f_path.dentry->d_sb; |
| 711 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 712 | struct cifs_dirent de = { NULL, }; |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 713 | struct cifs_fattr fattr; |
Christoph Hellwig | 9feed6f | 2011-07-16 15:23:49 -0400 | [diff] [blame] | 714 | struct qstr name; |
| 715 | int rc = 0; |
Christoph Hellwig | 9feed6f | 2011-07-16 15:23:49 -0400 | [diff] [blame] | 716 | ino_t ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 718 | rc = cifs_fill_dirent(&de, find_entry, file_info->srch_inf.info_level, |
| 719 | file_info->srch_inf.unicode); |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 720 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | return rc; |
| 722 | |
Christoph Hellwig | f16d59b | 2011-07-16 15:24:22 -0400 | [diff] [blame] | 723 | if (de.namelen > max_len) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 724 | cifs_dbg(VFS, "bad search response length %zd past smb end\n", |
| 725 | de.namelen); |
Christoph Hellwig | f16d59b | 2011-07-16 15:24:22 -0400 | [diff] [blame] | 726 | return -EINVAL; |
| 727 | } |
Jeff Layton | 132ac7b | 2009-02-10 07:33:57 -0500 | [diff] [blame] | 728 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | /* skip . and .. since we added them first */ |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 730 | if (cifs_entry_is_dot(&de, file_info->srch_inf.unicode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | return 0; |
| 732 | |
Christoph Hellwig | f16d59b | 2011-07-16 15:24:22 -0400 | [diff] [blame] | 733 | if (file_info->srch_inf.unicode) { |
| 734 | struct nls_table *nlt = cifs_sb->local_nls; |
| 735 | |
| 736 | name.name = scratch_buf; |
| 737 | name.len = |
Steve French | acbbb76 | 2012-01-18 22:32:33 -0600 | [diff] [blame] | 738 | cifs_from_utf16((char *)name.name, (__le16 *)de.name, |
| 739 | UNICODE_NAME_MAX, |
| 740 | min_t(size_t, de.namelen, |
| 741 | (size_t)max_len), nlt, |
| 742 | cifs_sb->mnt_cifs_flags & |
Christoph Hellwig | f16d59b | 2011-07-16 15:24:22 -0400 | [diff] [blame] | 743 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 744 | name.len -= nls_nullsize(nlt); |
| 745 | } else { |
| 746 | name.name = de.name; |
| 747 | name.len = de.namelen; |
| 748 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | |
Christoph Hellwig | 9feed6f | 2011-07-16 15:23:49 -0400 | [diff] [blame] | 750 | switch (file_info->srch_inf.info_level) { |
| 751 | case SMB_FIND_FILE_UNIX: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | cifs_unix_basic_to_fattr(&fattr, |
Christoph Hellwig | 9feed6f | 2011-07-16 15:23:49 -0400 | [diff] [blame] | 753 | &((FILE_UNIX_INFO *)find_entry)->basic, |
| 754 | cifs_sb); |
| 755 | break; |
| 756 | case SMB_FIND_FILE_INFO_STANDARD: |
| 757 | cifs_std_info_to_fattr(&fattr, |
| 758 | (FIND_FILE_STANDARD_INFO *)find_entry, |
| 759 | cifs_sb); |
| 760 | break; |
| 761 | default: |
| 762 | cifs_dir_info_to_fattr(&fattr, |
| 763 | (FILE_DIRECTORY_INFO *)find_entry, |
| 764 | cifs_sb); |
| 765 | break; |
| 766 | } |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 767 | |
Christoph Hellwig | f16d59b | 2011-07-16 15:24:22 -0400 | [diff] [blame] | 768 | if (de.ino && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
| 769 | fattr.cf_uniqueid = de.ino; |
Jeff Layton | ec06aed | 2009-11-06 14:18:29 -0500 | [diff] [blame] | 770 | } else { |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 771 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
Jeff Layton | ec06aed | 2009-11-06 14:18:29 -0500 | [diff] [blame] | 772 | cifs_autodisable_serverino(cifs_sb); |
| 773 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | |
Stefan Metzmacher | 1b12b9c | 2010-08-05 21:19:56 +0200 | [diff] [blame] | 775 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) && |
| 776 | CIFSCouldBeMFSymlink(&fattr)) |
| 777 | /* |
| 778 | * trying to get the type and mode can be slow, |
| 779 | * so just call those regular files for now, and mark |
| 780 | * for reval |
| 781 | */ |
| 782 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; |
| 783 | |
Jeff Layton | eb1b3fa | 2012-12-03 06:05:37 -0500 | [diff] [blame] | 784 | cifs_prime_dcache(file->f_dentry, &name, &fattr); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 785 | |
Jeff Layton | eb1b3fa | 2012-12-03 06:05:37 -0500 | [diff] [blame] | 786 | ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid); |
Al Viro | be4ccdc | 2013-05-22 16:17:25 -0400 | [diff] [blame] | 787 | return !dir_emit(ctx, name.name, name.len, ino, fattr.cf_dtype); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | } |
| 789 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | |
Al Viro | be4ccdc | 2013-05-22 16:17:25 -0400 | [diff] [blame] | 791 | int cifs_readdir(struct file *file, struct dir_context *ctx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | { |
| 793 | int rc = 0; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 794 | unsigned int xid; |
| 795 | int i; |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 796 | struct cifs_tcon *tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | struct cifsFileInfo *cifsFile = NULL; |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 798 | char *current_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | int num_to_fill = 0; |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 800 | char *tmp_buf = NULL; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 801 | char *end_of_smb; |
Jeff Layton | 1829579 | 2009-04-30 20:45:45 -0400 | [diff] [blame] | 802 | unsigned int max_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 804 | xid = get_xid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
Suresh Jayaraman | 6221ddd | 2010-10-01 21:23:33 +0530 | [diff] [blame] | 806 | /* |
| 807 | * Ensure FindFirst doesn't fail before doing filldir() for '.' and |
| 808 | * '..'. Otherwise we won't be able to notify VFS in case of failure. |
| 809 | */ |
| 810 | if (file->private_data == NULL) { |
| 811 | rc = initiate_cifs_search(xid, file); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 812 | cifs_dbg(FYI, "initiate cifs search rc %d\n", rc); |
Suresh Jayaraman | 6221ddd | 2010-10-01 21:23:33 +0530 | [diff] [blame] | 813 | if (rc) |
| 814 | goto rddir2_exit; |
| 815 | } |
| 816 | |
Al Viro | be4ccdc | 2013-05-22 16:17:25 -0400 | [diff] [blame] | 817 | if (!dir_emit_dots(file, ctx)) |
| 818 | goto rddir2_exit; |
| 819 | |
| 820 | /* 1) If search is active, |
| 821 | is in current search buffer? |
| 822 | if it before then restart search |
| 823 | if after then keep searching till find it */ |
| 824 | |
| 825 | if (file->private_data == NULL) { |
| 826 | rc = -EINVAL; |
| 827 | goto rddir2_exit; |
| 828 | } |
| 829 | cifsFile = file->private_data; |
| 830 | if (cifsFile->srch_inf.endOfSearch) { |
| 831 | if (cifsFile->srch_inf.emptyDir) { |
| 832 | cifs_dbg(FYI, "End of search, empty dir\n"); |
| 833 | rc = 0; |
| 834 | goto rddir2_exit; |
| 835 | } |
| 836 | } /* else { |
| 837 | cifsFile->invalidHandle = true; |
| 838 | tcon->ses->server->close(xid, tcon, &cifsFile->fid); |
| 839 | } */ |
| 840 | |
| 841 | tcon = tlink_tcon(cifsFile->tlink); |
| 842 | rc = find_cifs_entry(xid, tcon, ctx->pos, file, ¤t_entry, |
| 843 | &num_to_fill); |
| 844 | if (rc) { |
| 845 | cifs_dbg(FYI, "fce error %d\n", rc); |
| 846 | goto rddir2_exit; |
| 847 | } else if (current_entry != NULL) { |
| 848 | cifs_dbg(FYI, "entry %lld found\n", ctx->pos); |
| 849 | } else { |
| 850 | cifs_dbg(FYI, "could not find entry\n"); |
| 851 | goto rddir2_exit; |
| 852 | } |
| 853 | cifs_dbg(FYI, "loop through %d times filling dir for net buf %p\n", |
| 854 | num_to_fill, cifsFile->srch_inf.ntwrk_buf_start); |
| 855 | max_len = tcon->ses->server->ops->calc_smb_size( |
| 856 | cifsFile->srch_inf.ntwrk_buf_start); |
| 857 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; |
| 858 | |
| 859 | tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL); |
| 860 | if (tmp_buf == NULL) { |
| 861 | rc = -ENOMEM; |
| 862 | goto rddir2_exit; |
| 863 | } |
| 864 | |
| 865 | for (i = 0; i < num_to_fill; i++) { |
| 866 | if (current_entry == NULL) { |
| 867 | /* evaluate whether this case is an error */ |
| 868 | cifs_dbg(VFS, "past SMB end, num to fill %d i %d\n", |
| 869 | num_to_fill, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | break; |
| 871 | } |
Al Viro | be4ccdc | 2013-05-22 16:17:25 -0400 | [diff] [blame] | 872 | /* |
| 873 | * if buggy server returns . and .. late do we want to |
| 874 | * check for that here? |
| 875 | */ |
| 876 | rc = cifs_filldir(current_entry, file, ctx, |
| 877 | tmp_buf, max_len); |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 878 | if (rc) { |
Al Viro | be4ccdc | 2013-05-22 16:17:25 -0400 | [diff] [blame] | 879 | if (rc > 0) |
| 880 | rc = 0; |
Kulikov Vasiliy | f55fdcc | 2010-07-16 20:15:25 +0400 | [diff] [blame] | 881 | break; |
| 882 | } |
| 883 | |
Al Viro | be4ccdc | 2013-05-22 16:17:25 -0400 | [diff] [blame] | 884 | ctx->pos++; |
| 885 | if (ctx->pos == |
| 886 | cifsFile->srch_inf.index_of_last_entry) { |
| 887 | cifs_dbg(FYI, "last entry in buf at pos %lld %s\n", |
| 888 | ctx->pos, tmp_buf); |
| 889 | cifs_save_resume_key(current_entry, cifsFile); |
| 890 | break; |
| 891 | } else |
| 892 | current_entry = |
| 893 | nxt_dir_entry(current_entry, end_of_smb, |
| 894 | cifsFile->srch_inf.info_level); |
| 895 | } |
| 896 | kfree(tmp_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | |
| 898 | rddir2_exit: |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 899 | free_xid(xid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | return rc; |
| 901 | } |