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 | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 51 | cFYI(1, "empty cifs private file data"); |
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 | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 55 | cFYI(1, "invalid handle"); |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 56 | if (cf->srch_inf.endOfSearch) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 57 | cFYI(1, "end of search"); |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 58 | if (cf->srch_inf.emptyDir) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 59 | cFYI(1, "empty dir"); |
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 | /* |
| 69 | * Find the dentry that matches "name". If there isn't one, create one. If it's |
| 70 | * a negative dentry or the uniqueid changed, then drop it and recreate it. |
| 71 | */ |
| 72 | static struct dentry * |
| 73 | cifs_readdir_lookup(struct dentry *parent, struct qstr *name, |
| 74 | struct cifs_fattr *fattr) |
| 75 | { |
| 76 | struct dentry *dentry, *alias; |
| 77 | struct inode *inode; |
| 78 | struct super_block *sb = parent->d_inode->i_sb; |
| 79 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 80 | cFYI(1, "For %s", name->name); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 81 | |
Jeff Layton | 05507fa | 2010-02-05 13:30:36 -0500 | [diff] [blame] | 82 | if (parent->d_op && parent->d_op->d_hash) |
Nick Piggin | b1e6a01 | 2011-01-07 17:49:28 +1100 | [diff] [blame] | 83 | parent->d_op->d_hash(parent, parent->d_inode, name); |
Jeff Layton | 05507fa | 2010-02-05 13:30:36 -0500 | [diff] [blame] | 84 | else |
| 85 | name->hash = full_name_hash(name->name, name->len); |
| 86 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 87 | dentry = d_lookup(parent, name); |
| 88 | if (dentry) { |
Al Viro | 0903a0c | 2012-11-29 22:11:06 -0500 | [diff] [blame] | 89 | int err; |
Jeff Layton | cd60042 | 2012-07-06 07:09:42 -0400 | [diff] [blame] | 90 | inode = dentry->d_inode; |
| 91 | /* update inode in place if i_ino didn't change */ |
| 92 | if (inode && CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) { |
| 93 | cifs_fattr_to_inode(inode, fattr); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 94 | return dentry; |
Jeff Layton | cd60042 | 2012-07-06 07:09:42 -0400 | [diff] [blame] | 95 | } |
Al Viro | 0903a0c | 2012-11-29 22:11:06 -0500 | [diff] [blame] | 96 | err = d_invalidate(dentry); |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 97 | dput(dentry); |
Al Viro | 0903a0c | 2012-11-29 22:11:06 -0500 | [diff] [blame] | 98 | if (err) |
| 99 | return NULL; |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | dentry = d_alloc(parent, name); |
| 103 | if (dentry == NULL) |
| 104 | return NULL; |
| 105 | |
| 106 | inode = cifs_iget(sb, fattr); |
| 107 | if (!inode) { |
| 108 | dput(dentry); |
| 109 | return NULL; |
| 110 | } |
| 111 | |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 112 | alias = d_materialise_unique(dentry, inode); |
| 113 | if (alias != NULL) { |
| 114 | dput(dentry); |
| 115 | if (IS_ERR(alias)) |
| 116 | return NULL; |
| 117 | dentry = alias; |
| 118 | } |
| 119 | |
| 120 | return dentry; |
| 121 | } |
| 122 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 123 | static void |
| 124 | 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] | 125 | { |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 126 | fattr->cf_uid = cifs_sb->mnt_uid; |
| 127 | fattr->cf_gid = cifs_sb->mnt_gid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 129 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { |
| 130 | fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; |
| 131 | fattr->cf_dtype = DT_DIR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | } else { |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 133 | fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; |
| 134 | fattr->cf_dtype = DT_REG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | } |
| 136 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 137 | if (fattr->cf_cifsattrs & ATTR_READONLY) |
| 138 | fattr->cf_mode &= ~S_IWUGO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 140 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL && |
| 141 | fattr->cf_cifsattrs & ATTR_SYSTEM) { |
| 142 | if (fattr->cf_eof == 0) { |
| 143 | fattr->cf_mode &= ~S_IFMT; |
| 144 | fattr->cf_mode |= S_IFIFO; |
| 145 | fattr->cf_dtype = DT_FIFO; |
Steve French | 3020a1f | 2005-11-18 11:31:10 -0800 | [diff] [blame] | 146 | } else { |
Jeff Layton | 4468eb3 | 2008-05-22 09:31:40 -0400 | [diff] [blame] | 147 | /* |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 148 | * trying to get the type and mode via SFU can be slow, |
| 149 | * so just call those regular files for now, and mark |
| 150 | * for reval |
Jeff Layton | 4468eb3 | 2008-05-22 09:31:40 -0400 | [diff] [blame] | 151 | */ |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 152 | fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; |
Jeff Layton | 4468eb3 | 2008-05-22 09:31:40 -0400 | [diff] [blame] | 153 | } |
| 154 | } |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 155 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
Shirish Pargaonkar | c052e2b | 2012-09-28 12:21:14 -0500 | [diff] [blame] | 157 | void |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 158 | cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info, |
| 159 | struct cifs_sb_info *cifs_sb) |
| 160 | { |
| 161 | memset(fattr, 0, sizeof(*fattr)); |
| 162 | fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes); |
| 163 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); |
| 164 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); |
Jeff Layton | 20054bd | 2011-01-07 11:30:27 -0500 | [diff] [blame] | 165 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 166 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); |
| 167 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); |
| 168 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 170 | cifs_fill_common_info(fattr, cifs_sb); |
| 171 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
Steve French | 15dd478 | 2009-09-25 02:24:45 +0000 | [diff] [blame] | 173 | static void |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 174 | cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info, |
| 175 | struct cifs_sb_info *cifs_sb) |
| 176 | { |
Jeff Layton | 0d424ad | 2010-09-20 16:01:35 -0700 | [diff] [blame] | 177 | int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 179 | memset(fattr, 0, sizeof(*fattr)); |
| 180 | fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate, |
| 181 | info->LastAccessTime, offset); |
| 182 | fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate, |
| 183 | info->LastWriteTime, offset); |
| 184 | fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate, |
| 185 | info->LastWriteTime, offset); |
Steve French | f3f6ec4 | 2006-01-08 20:12:58 -0800 | [diff] [blame] | 186 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 187 | fattr->cf_cifsattrs = le16_to_cpu(info->Attributes); |
| 188 | fattr->cf_bytes = le32_to_cpu(info->AllocationSize); |
| 189 | fattr->cf_eof = le32_to_cpu(info->DataSize); |
Dave Kleikamp | 273d81d | 2006-06-01 19:41:23 +0000 | [diff] [blame] | 190 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 191 | cifs_fill_common_info(fattr, cifs_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | } |
| 193 | |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 194 | /* BB eventually need to add the following helper function to |
| 195 | resolve NT_STATUS_STOPPED_ON_SYMLINK return code when |
| 196 | we try to do FindFirst on (NTFS) directory symlinks */ |
| 197 | /* |
| 198 | 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] | 199 | unsigned int xid) |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 200 | { |
| 201 | __u16 fid; |
| 202 | int len; |
| 203 | int oplock = 0; |
| 204 | int rc; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 205 | struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb); |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 206 | char *tmpbuffer; |
| 207 | |
| 208 | rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ, |
| 209 | OPEN_REPARSE_POINT, &fid, &oplock, NULL, |
| 210 | cifs_sb->local_nls, |
| 211 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 212 | if (!rc) { |
| 213 | tmpbuffer = kmalloc(maxpath); |
| 214 | rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path, |
| 215 | tmpbuffer, |
| 216 | maxpath -1, |
| 217 | fid, |
| 218 | cifs_sb->local_nls); |
| 219 | if (CIFSSMBClose(xid, ptcon, fid)) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 220 | cFYI(1, "Error closing temporary reparsepoint open"); |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 221 | } |
| 222 | } |
| 223 | } |
| 224 | */ |
| 225 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 226 | static int |
| 227 | initiate_cifs_search(const unsigned int xid, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | { |
Shirish Pargaonkar | 2608bee | 2012-05-15 10:19:16 -0500 | [diff] [blame] | 229 | __u16 search_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | int rc = 0; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 231 | char *full_path = NULL; |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 232 | struct cifsFileInfo *cifsFile; |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 233 | 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] | 234 | struct tcon_link *tlink = NULL; |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 235 | struct cifs_tcon *tcon; |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 236 | struct TCP_Server_Info *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 238 | if (file->private_data == NULL) { |
Jeff Layton | 59c55ba | 2010-11-12 06:30:29 -0500 | [diff] [blame] | 239 | tlink = cifs_sb_tlink(cifs_sb); |
| 240 | if (IS_ERR(tlink)) |
| 241 | return PTR_ERR(tlink); |
| 242 | |
| 243 | cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); |
| 244 | if (cifsFile == NULL) { |
| 245 | rc = -ENOMEM; |
| 246 | goto error_exit; |
| 247 | } |
| 248 | file->private_data = cifsFile; |
| 249 | cifsFile->tlink = cifs_get_tlink(tlink); |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 250 | tcon = tlink_tcon(tlink); |
Jeff Layton | 59c55ba | 2010-11-12 06:30:29 -0500 | [diff] [blame] | 251 | } else { |
| 252 | cifsFile = file->private_data; |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 253 | tcon = tlink_tcon(cifsFile->tlink); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 254 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 256 | server = tcon->ses->server; |
| 257 | |
| 258 | if (!server->ops->query_dir_first) { |
| 259 | rc = -ENOSYS; |
| 260 | goto error_exit; |
| 261 | } |
| 262 | |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 263 | cifsFile->invalidHandle = true; |
| 264 | cifsFile->srch_inf.endOfSearch = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 266 | full_path = build_path_from_dentry(file->f_path.dentry); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 267 | if (full_path == NULL) { |
| 268 | rc = -ENOMEM; |
| 269 | goto error_exit; |
| 270 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 272 | 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] | 273 | |
Steve French | 75cf6bd | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 274 | ffirst_retry: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | /* test for Unix extensions */ |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 276 | /* 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] | 277 | /* if (cap_unix(tcon->ses) { */ |
| 278 | if (tcon->unix_ext) |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 279 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 280 | else if ((tcon->ses->capabilities & |
| 281 | tcon->ses->server->vals->cap_nt_find) == 0) { |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 282 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
| 284 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; |
| 285 | } else /* not srvinos - BB fixme add check for backlevel? */ { |
| 286 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; |
| 287 | } |
| 288 | |
Shirish Pargaonkar | 2608bee | 2012-05-15 10:19:16 -0500 | [diff] [blame] | 289 | search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME; |
| 290 | if (backup_cred(cifs_sb)) |
| 291 | search_flags |= CIFS_SEARCH_BACKUP_SEARCH; |
| 292 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 293 | rc = server->ops->query_dir_first(xid, tcon, full_path, cifs_sb, |
| 294 | &cifsFile->fid, search_flags, |
| 295 | &cifsFile->srch_inf); |
| 296 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 297 | if (rc == 0) |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 298 | cifsFile->invalidHandle = false; |
Steve French | e836f01 | 2009-05-01 16:20:35 +0000 | [diff] [blame] | 299 | /* BB add following call to handle readdir on new NTFS symlink errors |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 300 | else if STATUS_STOPPED_ON_SYMLINK |
| 301 | call get_symlink_reparse_path and retry with new path */ |
| 302 | else if ((rc == -EOPNOTSUPP) && |
Steve French | 75cf6bd | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 303 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
| 304 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; |
| 305 | goto ffirst_retry; |
| 306 | } |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 307 | error_exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | kfree(full_path); |
Jeff Layton | 7ffec37 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 309 | cifs_put_tlink(tlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | return rc; |
| 311 | } |
| 312 | |
| 313 | /* return length of unicode string in bytes */ |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 314 | static int cifs_unicode_bytelen(const char *str) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | { |
| 316 | int len; |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 317 | const __le16 *ustr = (const __le16 *)str; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 319 | for (len = 0; len <= PATH_MAX; len++) { |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 320 | if (ustr[len] == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | return len << 1; |
| 322 | } |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 323 | cFYI(1, "Unicode string longer than PATH_MAX found"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | return len << 1; |
| 325 | } |
| 326 | |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 327 | 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] | 328 | { |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 329 | char *new_entry; |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 330 | FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 332 | if (level == SMB_FIND_FILE_INFO_STANDARD) { |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 333 | FIND_FILE_STANDARD_INFO *pfData; |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 334 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; |
| 335 | |
| 336 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + |
| 337 | pfData->FileNameLength; |
| 338 | } else |
| 339 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 340 | cFYI(1, "new entry %p old entry %p", new_entry, old_entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | /* validate that new_entry is not past end of SMB */ |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 342 | if (new_entry >= end_of_smb) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 343 | cERROR(1, "search entry %p began after end of SMB %p old entry %p", |
| 344 | new_entry, end_of_smb, old_entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | return NULL; |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 346 | } else if (((level == SMB_FIND_FILE_INFO_STANDARD) && |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 347 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) |
| 348 | || ((level != SMB_FIND_FILE_INFO_STANDARD) && |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 349 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 350 | cERROR(1, "search entry %p extends after end of SMB %p", |
| 351 | new_entry, end_of_smb); |
Steve French | 09d1db5 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 352 | return NULL; |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 353 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | return new_entry; |
| 355 | |
| 356 | } |
| 357 | |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 358 | struct cifs_dirent { |
| 359 | const char *name; |
| 360 | size_t namelen; |
| 361 | u32 resume_key; |
| 362 | u64 ino; |
| 363 | }; |
| 364 | |
| 365 | static void cifs_fill_dirent_unix(struct cifs_dirent *de, |
| 366 | const FILE_UNIX_INFO *info, bool is_unicode) |
| 367 | { |
| 368 | de->name = &info->FileName[0]; |
| 369 | if (is_unicode) |
| 370 | de->namelen = cifs_unicode_bytelen(de->name); |
| 371 | else |
| 372 | de->namelen = strnlen(de->name, PATH_MAX); |
| 373 | de->resume_key = info->ResumeKey; |
| 374 | de->ino = le64_to_cpu(info->basic.UniqueId); |
| 375 | } |
| 376 | |
| 377 | static void cifs_fill_dirent_dir(struct cifs_dirent *de, |
| 378 | const FILE_DIRECTORY_INFO *info) |
| 379 | { |
| 380 | de->name = &info->FileName[0]; |
| 381 | de->namelen = le32_to_cpu(info->FileNameLength); |
| 382 | de->resume_key = info->FileIndex; |
| 383 | } |
| 384 | |
| 385 | static void cifs_fill_dirent_full(struct cifs_dirent *de, |
| 386 | const FILE_FULL_DIRECTORY_INFO *info) |
| 387 | { |
| 388 | de->name = &info->FileName[0]; |
| 389 | de->namelen = le32_to_cpu(info->FileNameLength); |
| 390 | de->resume_key = info->FileIndex; |
| 391 | } |
| 392 | |
| 393 | static void cifs_fill_dirent_search(struct cifs_dirent *de, |
| 394 | const SEARCH_ID_FULL_DIR_INFO *info) |
| 395 | { |
| 396 | de->name = &info->FileName[0]; |
| 397 | de->namelen = le32_to_cpu(info->FileNameLength); |
| 398 | de->resume_key = info->FileIndex; |
| 399 | de->ino = le64_to_cpu(info->UniqueId); |
| 400 | } |
| 401 | |
| 402 | static void cifs_fill_dirent_both(struct cifs_dirent *de, |
| 403 | const FILE_BOTH_DIRECTORY_INFO *info) |
| 404 | { |
| 405 | de->name = &info->FileName[0]; |
| 406 | de->namelen = le32_to_cpu(info->FileNameLength); |
| 407 | de->resume_key = info->FileIndex; |
| 408 | } |
| 409 | |
| 410 | static void cifs_fill_dirent_std(struct cifs_dirent *de, |
| 411 | const FIND_FILE_STANDARD_INFO *info) |
| 412 | { |
| 413 | de->name = &info->FileName[0]; |
| 414 | /* one byte length, no endianess conversion */ |
| 415 | de->namelen = info->FileNameLength; |
| 416 | de->resume_key = info->ResumeKey; |
| 417 | } |
| 418 | |
| 419 | static int cifs_fill_dirent(struct cifs_dirent *de, const void *info, |
| 420 | u16 level, bool is_unicode) |
| 421 | { |
| 422 | memset(de, 0, sizeof(*de)); |
| 423 | |
| 424 | switch (level) { |
| 425 | case SMB_FIND_FILE_UNIX: |
| 426 | cifs_fill_dirent_unix(de, info, is_unicode); |
| 427 | break; |
| 428 | case SMB_FIND_FILE_DIRECTORY_INFO: |
| 429 | cifs_fill_dirent_dir(de, info); |
| 430 | break; |
| 431 | case SMB_FIND_FILE_FULL_DIRECTORY_INFO: |
| 432 | cifs_fill_dirent_full(de, info); |
| 433 | break; |
| 434 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: |
| 435 | cifs_fill_dirent_search(de, info); |
| 436 | break; |
| 437 | case SMB_FIND_FILE_BOTH_DIRECTORY_INFO: |
| 438 | cifs_fill_dirent_both(de, info); |
| 439 | break; |
| 440 | case SMB_FIND_FILE_INFO_STANDARD: |
| 441 | cifs_fill_dirent_std(de, info); |
| 442 | break; |
| 443 | default: |
| 444 | cFYI(1, "Unknown findfirst level %d", level); |
| 445 | return -EINVAL; |
| 446 | } |
| 447 | |
| 448 | return 0; |
| 449 | } |
| 450 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | #define UNICODE_DOT cpu_to_le16(0x2e) |
| 452 | |
| 453 | /* 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] | 454 | 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] | 455 | { |
| 456 | int rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 458 | if (!de->name) |
| 459 | return 0; |
| 460 | |
| 461 | if (is_unicode) { |
| 462 | __le16 *ufilename = (__le16 *)de->name; |
| 463 | if (de->namelen == 2) { |
| 464 | /* check for . */ |
| 465 | if (ufilename[0] == UNICODE_DOT) |
| 466 | rc = 1; |
| 467 | } else if (de->namelen == 4) { |
| 468 | /* check for .. */ |
| 469 | if (ufilename[0] == UNICODE_DOT && |
| 470 | ufilename[1] == UNICODE_DOT) |
| 471 | rc = 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | } |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 473 | } else /* ASCII */ { |
| 474 | if (de->namelen == 1) { |
| 475 | if (de->name[0] == '.') |
| 476 | rc = 1; |
| 477 | } else if (de->namelen == 2) { |
| 478 | if (de->name[0] == '.' && de->name[1] == '.') |
| 479 | rc = 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | } |
| 481 | } |
| 482 | |
| 483 | return rc; |
| 484 | } |
| 485 | |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 486 | /* Check if directory that we are searching has changed so we can decide |
| 487 | whether we can use the cached search results from the previous search */ |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 488 | static int is_dir_changed(struct file *file) |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 489 | { |
Christoph Hellwig | c33f8d3 | 2007-04-02 18:47:20 +0000 | [diff] [blame] | 490 | struct inode *inode = file->f_path.dentry->d_inode; |
| 491 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 492 | |
Christoph Hellwig | c33f8d3 | 2007-04-02 18:47:20 +0000 | [diff] [blame] | 493 | if (cifsInfo->time == 0) |
Steve French | eafe870 | 2005-09-15 21:47:30 -0700 | [diff] [blame] | 494 | return 1; /* directory was changed, perhaps due to unlink */ |
| 495 | else |
| 496 | return 0; |
| 497 | |
| 498 | } |
| 499 | |
Steve French | 0752f15 | 2008-10-07 20:03:33 +0000 | [diff] [blame] | 500 | static int cifs_save_resume_key(const char *current_entry, |
Christoph Hellwig | eaf35b1 | 2011-07-16 15:24:37 -0400 | [diff] [blame] | 501 | struct cifsFileInfo *file_info) |
Steve French | 0752f15 | 2008-10-07 20:03:33 +0000 | [diff] [blame] | 502 | { |
Christoph Hellwig | eaf35b1 | 2011-07-16 15:24:37 -0400 | [diff] [blame] | 503 | struct cifs_dirent de; |
| 504 | int rc; |
Steve French | 0752f15 | 2008-10-07 20:03:33 +0000 | [diff] [blame] | 505 | |
Christoph Hellwig | eaf35b1 | 2011-07-16 15:24:37 -0400 | [diff] [blame] | 506 | rc = cifs_fill_dirent(&de, current_entry, file_info->srch_inf.info_level, |
| 507 | file_info->srch_inf.unicode); |
| 508 | if (!rc) { |
| 509 | file_info->srch_inf.presume_name = de.name; |
| 510 | file_info->srch_inf.resume_name_len = de.namelen; |
| 511 | file_info->srch_inf.resume_key = de.resume_key; |
Steve French | 0752f15 | 2008-10-07 20:03:33 +0000 | [diff] [blame] | 512 | } |
Steve French | 0752f15 | 2008-10-07 20:03:33 +0000 | [diff] [blame] | 513 | return rc; |
| 514 | } |
| 515 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 516 | /* |
| 517 | * Find the corresponding entry in the search. Note that the SMB server returns |
| 518 | * search entries for . and .. which complicates logic here if we choose to |
| 519 | * parse for them and we do not assume that they are located in the findfirst |
| 520 | * return buffer. We start counting in the buffer with entry 2 and increment for |
| 521 | * every entry (do not increment for . or .. entry). |
| 522 | */ |
| 523 | static int |
| 524 | find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, |
| 525 | struct file *file, char **current_entry, int *num_to_ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | { |
Shirish Pargaonkar | 2608bee | 2012-05-15 10:19:16 -0500 | [diff] [blame] | 527 | __u16 search_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | int rc = 0; |
| 529 | int pos_in_buf = 0; |
| 530 | loff_t first_entry_in_buffer; |
| 531 | loff_t index_to_find = file->f_pos; |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 532 | struct cifsFileInfo *cfile = file->private_data; |
Shirish Pargaonkar | 2608bee | 2012-05-15 10:19:16 -0500 | [diff] [blame] | 533 | 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] | 534 | struct TCP_Server_Info *server = tcon->ses->server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | /* check if index in the buffer */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 536 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 537 | if (!server->ops->query_dir_first || !server->ops->query_dir_next) |
| 538 | return -ENOSYS; |
| 539 | |
| 540 | if ((cfile == NULL) || (current_entry == NULL) || (num_to_ret == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | return -ENOENT; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 542 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 543 | *current_entry = NULL; |
| 544 | first_entry_in_buffer = cfile->srch_inf.index_of_last_entry - |
| 545 | cfile->srch_inf.entries_in_buffer; |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 546 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 547 | /* |
| 548 | * If first entry in buf is zero then is first buffer |
| 549 | * in search response data which means it is likely . and .. |
| 550 | * will be in this buffer, although some servers do not return |
| 551 | * . and .. for the root of a drive and for those we need |
| 552 | * to start two entries earlier. |
| 553 | */ |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 554 | |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 555 | dump_cifs_file_struct(file, "In fce "); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 556 | if (((index_to_find < cfile->srch_inf.index_of_last_entry) && |
| 557 | is_dir_changed(file)) || (index_to_find < first_entry_in_buffer)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | /* close and restart search */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 559 | cFYI(1, "search backing up - close and restart search"); |
Jeff Layton | 4477288 | 2010-10-15 15:34:03 -0400 | [diff] [blame] | 560 | spin_lock(&cifs_file_list_lock); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 561 | if (!cfile->srch_inf.endOfSearch && !cfile->invalidHandle) { |
| 562 | cfile->invalidHandle = true; |
Jeff Layton | 4477288 | 2010-10-15 15:34:03 -0400 | [diff] [blame] | 563 | spin_unlock(&cifs_file_list_lock); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 564 | if (server->ops->close) |
| 565 | server->ops->close(xid, tcon, &cfile->fid); |
Steve French | ddb4cbf | 2008-11-20 20:00:44 +0000 | [diff] [blame] | 566 | } else |
Jeff Layton | 4477288 | 2010-10-15 15:34:03 -0400 | [diff] [blame] | 567 | spin_unlock(&cifs_file_list_lock); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 568 | if (cfile->srch_inf.ntwrk_buf_start) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 569 | cFYI(1, "freeing SMB ff cache buf on search rewind"); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 570 | if (cfile->srch_inf.smallBuf) |
| 571 | cifs_small_buf_release(cfile->srch_inf. |
Steve French | d47d7c1 | 2006-02-28 03:45:48 +0000 | [diff] [blame] | 572 | ntwrk_buf_start); |
| 573 | else |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 574 | cifs_buf_release(cfile->srch_inf. |
Steve French | d47d7c1 | 2006-02-28 03:45:48 +0000 | [diff] [blame] | 575 | ntwrk_buf_start); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 576 | cfile->srch_inf.ntwrk_buf_start = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | } |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 578 | rc = initiate_cifs_search(xid, file); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 579 | if (rc) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 580 | cFYI(1, "error %d reinitiating a search on rewind", |
| 581 | rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | return rc; |
| 583 | } |
Jeff Layton | 7023676 | 2011-12-01 20:23:34 -0500 | [diff] [blame] | 584 | /* FindFirst/Next set last_entry to NULL on malformed reply */ |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 585 | if (cfile->srch_inf.last_entry) |
| 586 | cifs_save_resume_key(cfile->srch_inf.last_entry, cfile); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | } |
| 588 | |
Shirish Pargaonkar | 2608bee | 2012-05-15 10:19:16 -0500 | [diff] [blame] | 589 | search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME; |
| 590 | if (backup_cred(cifs_sb)) |
| 591 | search_flags |= CIFS_SEARCH_BACKUP_SEARCH; |
| 592 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 593 | while ((index_to_find >= cfile->srch_inf.index_of_last_entry) && |
| 594 | (rc == 0) && !cfile->srch_inf.endOfSearch) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 595 | cFYI(1, "calling findnext2"); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 596 | rc = server->ops->query_dir_next(xid, tcon, &cfile->fid, |
| 597 | search_flags, |
| 598 | &cfile->srch_inf); |
Jeff Layton | 7023676 | 2011-12-01 20:23:34 -0500 | [diff] [blame] | 599 | /* FindFirst/Next set last_entry to NULL on malformed reply */ |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 600 | if (cfile->srch_inf.last_entry) |
| 601 | cifs_save_resume_key(cfile->srch_inf.last_entry, cfile); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 602 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | return -ENOENT; |
| 604 | } |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 605 | if (index_to_find < cfile->srch_inf.index_of_last_entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | /* we found the buffer that contains the entry */ |
| 607 | /* scan and find it */ |
| 608 | int i; |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 609 | char *cur_ent; |
| 610 | char *end_of_smb = cfile->srch_inf.ntwrk_buf_start + |
| 611 | server->ops->calc_smb_size( |
| 612 | cfile->srch_inf.ntwrk_buf_start); |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 613 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 614 | cur_ent = cfile->srch_inf.srch_entries_start; |
| 615 | first_entry_in_buffer = cfile->srch_inf.index_of_last_entry |
| 616 | - cfile->srch_inf.entries_in_buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | pos_in_buf = index_to_find - first_entry_in_buffer; |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 618 | cFYI(1, "found entry - pos_in_buf %d", pos_in_buf); |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 619 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 620 | for (i = 0; (i < (pos_in_buf)) && (cur_ent != NULL); i++) { |
Steve French | dfb7533 | 2005-06-22 17:13:47 -0700 | [diff] [blame] | 621 | /* go entry by entry figuring out which is first */ |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 622 | cur_ent = nxt_dir_entry(cur_ent, end_of_smb, |
| 623 | cfile->srch_inf.info_level); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | } |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 625 | if ((cur_ent == NULL) && (i < pos_in_buf)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | /* BB fixme - check if we should flag this error */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 627 | cERROR(1, "reached end of buf searching for pos in buf" |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 628 | " %d index to find %lld rc %d", pos_in_buf, |
| 629 | index_to_find, rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | } |
| 631 | rc = 0; |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 632 | *current_entry = cur_ent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | } else { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 634 | cFYI(1, "index not in buffer - could not findnext into it"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | return 0; |
| 636 | } |
| 637 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 638 | if (pos_in_buf >= cfile->srch_inf.entries_in_buffer) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 639 | cFYI(1, "can not return entries pos_in_buf beyond last"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | *num_to_ret = 0; |
| 641 | } else |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 642 | *num_to_ret = cfile->srch_inf.entries_in_buffer - pos_in_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | |
| 644 | return rc; |
| 645 | } |
| 646 | |
Christoph Hellwig | 9feed6f | 2011-07-16 15:23:49 -0400 | [diff] [blame] | 647 | static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir, |
| 648 | void *dirent, char *scratch_buf, unsigned int max_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | { |
Christoph Hellwig | 9feed6f | 2011-07-16 15:23:49 -0400 | [diff] [blame] | 650 | struct cifsFileInfo *file_info = file->private_data; |
| 651 | struct super_block *sb = file->f_path.dentry->d_sb; |
| 652 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 653 | struct cifs_dirent de = { NULL, }; |
Jeff Layton | cc0bad7 | 2009-06-25 00:56:52 -0400 | [diff] [blame] | 654 | struct cifs_fattr fattr; |
Christoph Hellwig | 9feed6f | 2011-07-16 15:23:49 -0400 | [diff] [blame] | 655 | struct dentry *dentry; |
| 656 | struct qstr name; |
| 657 | int rc = 0; |
Christoph Hellwig | 9feed6f | 2011-07-16 15:23:49 -0400 | [diff] [blame] | 658 | ino_t ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 660 | rc = cifs_fill_dirent(&de, find_entry, file_info->srch_inf.info_level, |
| 661 | file_info->srch_inf.unicode); |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 662 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | return rc; |
| 664 | |
Christoph Hellwig | f16d59b | 2011-07-16 15:24:22 -0400 | [diff] [blame] | 665 | if (de.namelen > max_len) { |
| 666 | cERROR(1, "bad search response length %zd past smb end", |
| 667 | de.namelen); |
| 668 | return -EINVAL; |
| 669 | } |
Jeff Layton | 132ac7b | 2009-02-10 07:33:57 -0500 | [diff] [blame] | 670 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | /* skip . and .. since we added them first */ |
Christoph Hellwig | cda0ec6 | 2011-07-16 15:24:05 -0400 | [diff] [blame] | 672 | if (cifs_entry_is_dot(&de, file_info->srch_inf.unicode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | return 0; |
| 674 | |
Christoph Hellwig | f16d59b | 2011-07-16 15:24:22 -0400 | [diff] [blame] | 675 | if (file_info->srch_inf.unicode) { |
| 676 | struct nls_table *nlt = cifs_sb->local_nls; |
| 677 | |
| 678 | name.name = scratch_buf; |
| 679 | name.len = |
Steve French | acbbb76 | 2012-01-18 22:32:33 -0600 | [diff] [blame] | 680 | cifs_from_utf16((char *)name.name, (__le16 *)de.name, |
| 681 | UNICODE_NAME_MAX, |
| 682 | min_t(size_t, de.namelen, |
| 683 | (size_t)max_len), nlt, |
| 684 | cifs_sb->mnt_cifs_flags & |
Christoph Hellwig | f16d59b | 2011-07-16 15:24:22 -0400 | [diff] [blame] | 685 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 686 | name.len -= nls_nullsize(nlt); |
| 687 | } else { |
| 688 | name.name = de.name; |
| 689 | name.len = de.namelen; |
| 690 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | |
Christoph Hellwig | 9feed6f | 2011-07-16 15:23:49 -0400 | [diff] [blame] | 692 | switch (file_info->srch_inf.info_level) { |
| 693 | case SMB_FIND_FILE_UNIX: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | cifs_unix_basic_to_fattr(&fattr, |
Christoph Hellwig | 9feed6f | 2011-07-16 15:23:49 -0400 | [diff] [blame] | 695 | &((FILE_UNIX_INFO *)find_entry)->basic, |
| 696 | cifs_sb); |
| 697 | break; |
| 698 | case SMB_FIND_FILE_INFO_STANDARD: |
| 699 | cifs_std_info_to_fattr(&fattr, |
| 700 | (FIND_FILE_STANDARD_INFO *)find_entry, |
| 701 | cifs_sb); |
| 702 | break; |
| 703 | default: |
| 704 | cifs_dir_info_to_fattr(&fattr, |
| 705 | (FILE_DIRECTORY_INFO *)find_entry, |
| 706 | cifs_sb); |
| 707 | break; |
| 708 | } |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 709 | |
Christoph Hellwig | f16d59b | 2011-07-16 15:24:22 -0400 | [diff] [blame] | 710 | if (de.ino && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
| 711 | fattr.cf_uniqueid = de.ino; |
Jeff Layton | ec06aed | 2009-11-06 14:18:29 -0500 | [diff] [blame] | 712 | } else { |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 713 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
Jeff Layton | ec06aed | 2009-11-06 14:18:29 -0500 | [diff] [blame] | 714 | cifs_autodisable_serverino(cifs_sb); |
| 715 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | |
Stefan Metzmacher | 1b12b9c | 2010-08-05 21:19:56 +0200 | [diff] [blame] | 717 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) && |
| 718 | CIFSCouldBeMFSymlink(&fattr)) |
| 719 | /* |
| 720 | * trying to get the type and mode can be slow, |
| 721 | * so just call those regular files for now, and mark |
| 722 | * for reval |
| 723 | */ |
| 724 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; |
| 725 | |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 726 | ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid); |
Christoph Hellwig | 9feed6f | 2011-07-16 15:23:49 -0400 | [diff] [blame] | 727 | dentry = cifs_readdir_lookup(file->f_dentry, &name, &fattr); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 728 | |
Christoph Hellwig | 9feed6f | 2011-07-16 15:23:49 -0400 | [diff] [blame] | 729 | rc = filldir(dirent, name.name, name.len, file->f_pos, ino, |
| 730 | fattr.cf_dtype); |
Jeff Layton | 0b8f18e | 2009-07-09 01:46:37 -0400 | [diff] [blame] | 731 | |
Christoph Hellwig | 9feed6f | 2011-07-16 15:23:49 -0400 | [diff] [blame] | 732 | dput(dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | return rc; |
| 734 | } |
| 735 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | |
| 737 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) |
| 738 | { |
| 739 | int rc = 0; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 740 | unsigned int xid; |
| 741 | int i; |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 742 | struct cifs_tcon *tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | struct cifsFileInfo *cifsFile = NULL; |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 744 | char *current_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | int num_to_fill = 0; |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 746 | char *tmp_buf = NULL; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 747 | char *end_of_smb; |
Jeff Layton | 1829579 | 2009-04-30 20:45:45 -0400 | [diff] [blame] | 748 | unsigned int max_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 750 | xid = get_xid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | |
Suresh Jayaraman | 6221ddd | 2010-10-01 21:23:33 +0530 | [diff] [blame] | 752 | /* |
| 753 | * Ensure FindFirst doesn't fail before doing filldir() for '.' and |
| 754 | * '..'. Otherwise we won't be able to notify VFS in case of failure. |
| 755 | */ |
| 756 | if (file->private_data == NULL) { |
| 757 | rc = initiate_cifs_search(xid, file); |
| 758 | cFYI(1, "initiate cifs search rc %d", rc); |
| 759 | if (rc) |
| 760 | goto rddir2_exit; |
| 761 | } |
| 762 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | switch ((int) file->f_pos) { |
| 764 | case 0: |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 765 | if (filldir(direntry, ".", 1, file->f_pos, |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 766 | file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 767 | cERROR(1, "Filldir for current dir failed"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | rc = -ENOMEM; |
| 769 | break; |
| 770 | } |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 771 | file->f_pos++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | case 1: |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 773 | if (filldir(direntry, "..", 2, file->f_pos, |
Al Viro | b85fd6b | 2011-07-17 11:19:44 -0400 | [diff] [blame] | 774 | parent_ino(file->f_path.dentry), DT_DIR) < 0) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 775 | cERROR(1, "Filldir for parent dir failed"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | rc = -ENOMEM; |
| 777 | break; |
| 778 | } |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 779 | file->f_pos++; |
| 780 | default: |
Steve French | 3870253 | 2007-07-08 15:40:40 +0000 | [diff] [blame] | 781 | /* 1) If search is active, |
| 782 | is in current search buffer? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | if it before then restart search |
| 784 | if after then keep searching till find it */ |
| 785 | |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 786 | if (file->private_data == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | rc = -EINVAL; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 788 | free_xid(xid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | return rc; |
| 790 | } |
| 791 | cifsFile = file->private_data; |
| 792 | if (cifsFile->srch_inf.endOfSearch) { |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 793 | if (cifsFile->srch_inf.emptyDir) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 794 | cFYI(1, "End of search, empty dir"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | rc = 0; |
| 796 | break; |
| 797 | } |
| 798 | } /* else { |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 799 | cifsFile->invalidHandle = true; |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 800 | tcon->ses->server->close(xid, tcon, &cifsFile->fid); |
Steve French | aaa9bbe | 2008-05-23 17:38:32 +0000 | [diff] [blame] | 801 | } */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 803 | tcon = tlink_tcon(cifsFile->tlink); |
| 804 | rc = find_cifs_entry(xid, tcon, file, ¤t_entry, |
| 805 | &num_to_fill); |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 806 | if (rc) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 807 | cFYI(1, "fce error %d", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | goto rddir2_exit; |
| 809 | } else if (current_entry != NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 810 | cFYI(1, "entry %lld found", file->f_pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | } else { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 812 | cFYI(1, "could not find entry"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | goto rddir2_exit; |
| 814 | } |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 815 | cFYI(1, "loop through %d times filling dir for net buf %p", |
| 816 | num_to_fill, cifsFile->srch_inf.ntwrk_buf_start); |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 817 | max_len = tcon->ses->server->ops->calc_smb_size( |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 818 | cifsFile->srch_inf.ntwrk_buf_start); |
| 819 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; |
| 820 | |
Jeff Layton | f588416 | 2009-04-30 07:18:00 -0400 | [diff] [blame] | 821 | tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL); |
Kulikov Vasiliy | f55fdcc | 2010-07-16 20:15:25 +0400 | [diff] [blame] | 822 | if (tmp_buf == NULL) { |
| 823 | rc = -ENOMEM; |
| 824 | break; |
| 825 | } |
| 826 | |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 827 | for (i = 0; (i < num_to_fill) && (rc == 0); i++) { |
| 828 | if (current_entry == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | /* evaluate whether this case is an error */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 830 | cERROR(1, "past SMB end, num to fill %d i %d", |
| 831 | num_to_fill, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | break; |
| 833 | } |
Pavel Shilovsky | 92fc65a | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 834 | /* |
| 835 | * if buggy server returns . and .. late do we want to |
| 836 | * check for that here? |
| 837 | */ |
| 838 | rc = cifs_filldir(current_entry, file, filldir, |
| 839 | direntry, tmp_buf, max_len); |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 840 | if (rc == -EOVERFLOW) { |
Steve French | 7ca85ba | 2006-10-30 21:42:57 +0000 | [diff] [blame] | 841 | rc = 0; |
| 842 | break; |
| 843 | } |
| 844 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | file->f_pos++; |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 846 | if (file->f_pos == |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 847 | cifsFile->srch_inf.index_of_last_entry) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 848 | cFYI(1, "last entry in buf at pos %lld %s", |
| 849 | file->f_pos, tmp_buf); |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 850 | cifs_save_resume_key(current_entry, cifsFile); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | break; |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 852 | } else |
| 853 | current_entry = |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 854 | nxt_dir_entry(current_entry, end_of_smb, |
| 855 | cifsFile->srch_inf.info_level); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | } |
| 857 | kfree(tmp_buf); |
| 858 | break; |
| 859 | } /* end switch */ |
| 860 | |
| 861 | rddir2_exit: |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 862 | free_xid(xid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | return rc; |
| 864 | } |