Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/file.c |
| 3 | * |
| 4 | * vfs operations that deal with files |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 5 | * |
Steve French | f19159d | 2010-04-21 04:12:10 +0000 | [diff] [blame] | 6 | * Copyright (C) International Business Machines Corp., 2002,2010 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * Author(s): Steve French (sfrench@us.ibm.com) |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 8 | * Jeremy Allison (jra@samba.org) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 25 | #include <linux/backing-dev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/stat.h> |
| 27 | #include <linux/fcntl.h> |
| 28 | #include <linux/pagemap.h> |
| 29 | #include <linux/pagevec.h> |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 30 | #include <linux/writeback.h> |
Andrew Morton | 6f88cc2 | 2006-12-10 02:19:44 -0800 | [diff] [blame] | 31 | #include <linux/task_io_accounting_ops.h> |
Steve French | 23e7dd7 | 2005-10-20 13:44:56 -0700 | [diff] [blame] | 32 | #include <linux/delay.h> |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame] | 33 | #include <linux/mount.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 34 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <asm/div64.h> |
| 36 | #include "cifsfs.h" |
| 37 | #include "cifspdu.h" |
| 38 | #include "cifsglob.h" |
| 39 | #include "cifsproto.h" |
| 40 | #include "cifs_unicode.h" |
| 41 | #include "cifs_debug.h" |
| 42 | #include "cifs_fs_sb.h" |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | static inline int cifs_convert_flags(unsigned int flags) |
| 45 | { |
| 46 | if ((flags & O_ACCMODE) == O_RDONLY) |
| 47 | return GENERIC_READ; |
| 48 | else if ((flags & O_ACCMODE) == O_WRONLY) |
| 49 | return GENERIC_WRITE; |
| 50 | else if ((flags & O_ACCMODE) == O_RDWR) { |
| 51 | /* GENERIC_ALL is too much permission to request |
| 52 | can cause unnecessary access denied on create */ |
| 53 | /* return GENERIC_ALL; */ |
| 54 | return (GENERIC_READ | GENERIC_WRITE); |
| 55 | } |
| 56 | |
Jeff Layton | e10f7b5 | 2008-05-14 10:21:33 -0700 | [diff] [blame] | 57 | return (READ_CONTROL | FILE_WRITE_ATTRIBUTES | FILE_READ_ATTRIBUTES | |
| 58 | FILE_WRITE_EA | FILE_APPEND_DATA | FILE_WRITE_DATA | |
| 59 | FILE_READ_DATA); |
Steve French | 7fc8f4e | 2009-02-23 20:43:11 +0000 | [diff] [blame] | 60 | } |
Jeff Layton | e10f7b5 | 2008-05-14 10:21:33 -0700 | [diff] [blame] | 61 | |
Steve French | 7fc8f4e | 2009-02-23 20:43:11 +0000 | [diff] [blame] | 62 | static inline fmode_t cifs_posix_convert_flags(unsigned int flags) |
| 63 | { |
| 64 | fmode_t posix_flags = 0; |
Jeff Layton | e10f7b5 | 2008-05-14 10:21:33 -0700 | [diff] [blame] | 65 | |
Steve French | 7fc8f4e | 2009-02-23 20:43:11 +0000 | [diff] [blame] | 66 | if ((flags & O_ACCMODE) == O_RDONLY) |
| 67 | posix_flags = FMODE_READ; |
| 68 | else if ((flags & O_ACCMODE) == O_WRONLY) |
| 69 | posix_flags = FMODE_WRITE; |
| 70 | else if ((flags & O_ACCMODE) == O_RDWR) { |
| 71 | /* GENERIC_ALL is too much permission to request |
| 72 | can cause unnecessary access denied on create */ |
| 73 | /* return GENERIC_ALL; */ |
| 74 | posix_flags = FMODE_READ | FMODE_WRITE; |
| 75 | } |
| 76 | /* can not map O_CREAT or O_EXCL or O_TRUNC flags when |
| 77 | reopening a file. They had their effect on the original open */ |
| 78 | if (flags & O_APPEND) |
| 79 | posix_flags |= (fmode_t)O_APPEND; |
Christoph Hellwig | 6b2f3d1 | 2009-10-27 11:05:28 +0100 | [diff] [blame] | 80 | if (flags & O_DSYNC) |
| 81 | posix_flags |= (fmode_t)O_DSYNC; |
| 82 | if (flags & __O_SYNC) |
| 83 | posix_flags |= (fmode_t)__O_SYNC; |
Steve French | 7fc8f4e | 2009-02-23 20:43:11 +0000 | [diff] [blame] | 84 | if (flags & O_DIRECTORY) |
| 85 | posix_flags |= (fmode_t)O_DIRECTORY; |
| 86 | if (flags & O_NOFOLLOW) |
| 87 | posix_flags |= (fmode_t)O_NOFOLLOW; |
| 88 | if (flags & O_DIRECT) |
| 89 | posix_flags |= (fmode_t)O_DIRECT; |
| 90 | |
| 91 | return posix_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | static inline int cifs_get_disposition(unsigned int flags) |
| 95 | { |
| 96 | if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
| 97 | return FILE_CREATE; |
| 98 | else if ((flags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
| 99 | return FILE_OVERWRITE_IF; |
| 100 | else if ((flags & O_CREAT) == O_CREAT) |
| 101 | return FILE_OPEN_IF; |
Steve French | 55aa2e0 | 2006-05-30 18:09:31 +0000 | [diff] [blame] | 102 | else if ((flags & O_TRUNC) == O_TRUNC) |
| 103 | return FILE_OVERWRITE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | else |
| 105 | return FILE_OPEN; |
| 106 | } |
| 107 | |
| 108 | /* all arguments to this function must be checked for validity in caller */ |
Jeff Layton | 590a3fe | 2009-09-12 11:54:28 -0400 | [diff] [blame] | 109 | static inline int |
| 110 | cifs_posix_open_inode_helper(struct inode *inode, struct file *file, |
Suresh Jayaraman | 51c8176 | 2010-05-10 15:15:24 +0530 | [diff] [blame] | 111 | struct cifsInodeInfo *pCifsInode, __u32 oplock, |
Jeff Layton | 590a3fe | 2009-09-12 11:54:28 -0400 | [diff] [blame] | 112 | u16 netfid) |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 113 | { |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 114 | |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 115 | write_lock(&GlobalSMBSeslock); |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 116 | |
| 117 | pCifsInode = CIFS_I(file->f_path.dentry->d_inode); |
| 118 | if (pCifsInode == NULL) { |
| 119 | write_unlock(&GlobalSMBSeslock); |
| 120 | return -EINVAL; |
| 121 | } |
| 122 | |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 123 | if (pCifsInode->clientCanCacheRead) { |
| 124 | /* we have the inode open somewhere else |
| 125 | no need to discard cache data */ |
| 126 | goto psx_client_can_cache; |
| 127 | } |
| 128 | |
| 129 | /* BB FIXME need to fix this check to move it earlier into posix_open |
| 130 | BB fIX following section BB FIXME */ |
| 131 | |
| 132 | /* if not oplocked, invalidate inode pages if mtime or file |
| 133 | size changed */ |
| 134 | /* temp = cifs_NTtimeToUnix(le64_to_cpu(buf->LastWriteTime)); |
| 135 | if (timespec_equal(&file->f_path.dentry->d_inode->i_mtime, &temp) && |
| 136 | (file->f_path.dentry->d_inode->i_size == |
| 137 | (loff_t)le64_to_cpu(buf->EndOfFile))) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 138 | cFYI(1, "inode unchanged on server"); |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 139 | } else { |
| 140 | if (file->f_path.dentry->d_inode->i_mapping) { |
| 141 | rc = filemap_write_and_wait(file->f_path.dentry->d_inode->i_mapping); |
| 142 | if (rc != 0) |
| 143 | CIFS_I(file->f_path.dentry->d_inode)->write_behind_rc = rc; |
| 144 | } |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 145 | cFYI(1, "invalidating remote inode since open detected it " |
| 146 | "changed"); |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 147 | invalidate_remote_inode(file->f_path.dentry->d_inode); |
| 148 | } */ |
| 149 | |
| 150 | psx_client_can_cache: |
| 151 | if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) { |
| 152 | pCifsInode->clientCanCacheAll = true; |
| 153 | pCifsInode->clientCanCacheRead = true; |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 154 | cFYI(1, "Exclusive Oplock granted on inode %p", |
| 155 | file->f_path.dentry->d_inode); |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 156 | } else if ((oplock & 0xF) == OPLOCK_READ) |
| 157 | pCifsInode->clientCanCacheRead = true; |
| 158 | |
| 159 | /* will have to change the unlock if we reenable the |
| 160 | filemap_fdatawrite (which does not seem necessary */ |
| 161 | write_unlock(&GlobalSMBSeslock); |
| 162 | return 0; |
| 163 | } |
| 164 | |
Steve French | 703a3b8 | 2009-05-21 22:21:53 +0000 | [diff] [blame] | 165 | static struct cifsFileInfo * |
| 166 | cifs_fill_filedata(struct file *file) |
| 167 | { |
| 168 | struct list_head *tmp; |
| 169 | struct cifsFileInfo *pCifsFile = NULL; |
| 170 | struct cifsInodeInfo *pCifsInode = NULL; |
| 171 | |
| 172 | /* search inode for this file and fill in file->private_data */ |
| 173 | pCifsInode = CIFS_I(file->f_path.dentry->d_inode); |
| 174 | read_lock(&GlobalSMBSeslock); |
| 175 | list_for_each(tmp, &pCifsInode->openFileList) { |
| 176 | pCifsFile = list_entry(tmp, struct cifsFileInfo, flist); |
| 177 | if ((pCifsFile->pfile == NULL) && |
| 178 | (pCifsFile->pid == current->tgid)) { |
| 179 | /* mode set in cifs_create */ |
| 180 | |
| 181 | /* needed for writepage */ |
| 182 | pCifsFile->pfile = file; |
| 183 | file->private_data = pCifsFile; |
| 184 | break; |
| 185 | } |
| 186 | } |
| 187 | read_unlock(&GlobalSMBSeslock); |
| 188 | |
| 189 | if (file->private_data != NULL) { |
| 190 | return pCifsFile; |
| 191 | } else if ((file->f_flags & O_CREAT) && (file->f_flags & O_EXCL)) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 192 | cERROR(1, "could not find file instance for " |
| 193 | "new file %p", file); |
Steve French | 703a3b8 | 2009-05-21 22:21:53 +0000 | [diff] [blame] | 194 | return NULL; |
| 195 | } |
| 196 | |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 197 | /* all arguments to this function must be checked for validity in caller */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | static inline int cifs_open_inode_helper(struct inode *inode, struct file *file, |
| 199 | struct cifsInodeInfo *pCifsInode, struct cifsFileInfo *pCifsFile, |
| 200 | struct cifsTconInfo *pTcon, int *oplock, FILE_ALL_INFO *buf, |
| 201 | char *full_path, int xid) |
| 202 | { |
| 203 | struct timespec temp; |
| 204 | int rc; |
| 205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | if (pCifsInode->clientCanCacheRead) { |
| 207 | /* we have the inode open somewhere else |
| 208 | no need to discard cache data */ |
| 209 | goto client_can_cache; |
| 210 | } |
| 211 | |
| 212 | /* BB need same check in cifs_create too? */ |
| 213 | /* if not oplocked, invalidate inode pages if mtime or file |
| 214 | size changed */ |
Jeff Layton | 07119a4 | 2009-05-27 09:37:33 -0400 | [diff] [blame] | 215 | temp = cifs_NTtimeToUnix(buf->LastWriteTime); |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 216 | if (timespec_equal(&file->f_path.dentry->d_inode->i_mtime, &temp) && |
| 217 | (file->f_path.dentry->d_inode->i_size == |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | (loff_t)le64_to_cpu(buf->EndOfFile))) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 219 | cFYI(1, "inode unchanged on server"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } else { |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 221 | if (file->f_path.dentry->d_inode->i_mapping) { |
Steve French | ff215713 | 2010-03-09 20:30:42 +0000 | [diff] [blame] | 222 | /* BB no need to lock inode until after invalidate |
| 223 | since namei code should already have it locked? */ |
Jeff Layton | cea2180 | 2007-11-20 23:19:03 +0000 | [diff] [blame] | 224 | rc = filemap_write_and_wait(file->f_path.dentry->d_inode->i_mapping); |
| 225 | if (rc != 0) |
| 226 | CIFS_I(file->f_path.dentry->d_inode)->write_behind_rc = rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | } |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 228 | cFYI(1, "invalidating remote inode since open detected it " |
| 229 | "changed"); |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 230 | invalidate_remote_inode(file->f_path.dentry->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | client_can_cache: |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 234 | if (pTcon->unix_ext) |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 235 | rc = cifs_get_inode_info_unix(&file->f_path.dentry->d_inode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | full_path, inode->i_sb, xid); |
| 237 | else |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 238 | rc = cifs_get_inode_info(&file->f_path.dentry->d_inode, |
Steve French | 8b1327f | 2008-03-14 22:37:16 +0000 | [diff] [blame] | 239 | full_path, buf, inode->i_sb, xid, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
| 241 | if ((*oplock & 0xF) == OPLOCK_EXCLUSIVE) { |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 242 | pCifsInode->clientCanCacheAll = true; |
| 243 | pCifsInode->clientCanCacheRead = true; |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 244 | cFYI(1, "Exclusive Oplock granted on inode %p", |
| 245 | file->f_path.dentry->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | } else if ((*oplock & 0xF) == OPLOCK_READ) |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 247 | pCifsInode->clientCanCacheRead = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | |
| 249 | return rc; |
| 250 | } |
| 251 | |
| 252 | int cifs_open(struct inode *inode, struct file *file) |
| 253 | { |
| 254 | int rc = -EACCES; |
Jeff Layton | 590a3fe | 2009-09-12 11:54:28 -0400 | [diff] [blame] | 255 | int xid; |
| 256 | __u32 oplock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | struct cifs_sb_info *cifs_sb; |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 258 | struct cifsTconInfo *tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | struct cifsFileInfo *pCifsFile; |
| 260 | struct cifsInodeInfo *pCifsInode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | char *full_path = NULL; |
| 262 | int desiredAccess; |
| 263 | int disposition; |
| 264 | __u16 netfid; |
| 265 | FILE_ALL_INFO *buf = NULL; |
| 266 | |
| 267 | xid = GetXid(); |
| 268 | |
| 269 | cifs_sb = CIFS_SB(inode->i_sb); |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 270 | tcon = cifs_sb->tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 272 | pCifsInode = CIFS_I(file->f_path.dentry->d_inode); |
Steve French | 703a3b8 | 2009-05-21 22:21:53 +0000 | [diff] [blame] | 273 | pCifsFile = cifs_fill_filedata(file); |
| 274 | if (pCifsFile) { |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 275 | rc = 0; |
Steve French | a6ce493 | 2009-04-09 01:14:32 +0000 | [diff] [blame] | 276 | FreeXid(xid); |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 277 | return rc; |
Steve French | 703a3b8 | 2009-05-21 22:21:53 +0000 | [diff] [blame] | 278 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 280 | full_path = build_path_from_dentry(file->f_path.dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | if (full_path == NULL) { |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 282 | rc = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | FreeXid(xid); |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 284 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | } |
| 286 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 287 | cFYI(1, "inode = 0x%p file flags are 0x%x for %s", |
| 288 | inode, file->f_flags, full_path); |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 289 | |
| 290 | if (oplockEnabled) |
| 291 | oplock = REQ_OPLOCK; |
| 292 | else |
| 293 | oplock = 0; |
| 294 | |
Steve French | 64cc2c6 | 2009-03-04 19:54:08 +0000 | [diff] [blame] | 295 | if (!tcon->broken_posix_open && tcon->unix_ext && |
| 296 | (tcon->ses->capabilities & CAP_UNIX) && |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 297 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
| 298 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
| 299 | int oflags = (int) cifs_posix_convert_flags(file->f_flags); |
Steve French | fa588e0 | 2010-04-22 19:21:55 +0000 | [diff] [blame] | 300 | oflags |= SMB_O_CREAT; |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 301 | /* can not refresh inode info since size could be stale */ |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame] | 302 | rc = cifs_posix_open(full_path, &inode, file->f_path.mnt, |
Steve French | fa588e0 | 2010-04-22 19:21:55 +0000 | [diff] [blame] | 303 | inode->i_sb, |
| 304 | cifs_sb->mnt_file_mode /* ignored */, |
| 305 | oflags, &oplock, &netfid, xid); |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 306 | if (rc == 0) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 307 | cFYI(1, "posix open succeeded"); |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 308 | /* no need for special case handling of setting mode |
| 309 | on read only files needed here */ |
| 310 | |
Steve French | 703a3b8 | 2009-05-21 22:21:53 +0000 | [diff] [blame] | 311 | pCifsFile = cifs_fill_filedata(file); |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 312 | cifs_posix_open_inode_helper(inode, file, pCifsInode, |
Suresh Jayaraman | 51c8176 | 2010-05-10 15:15:24 +0530 | [diff] [blame] | 313 | oplock, netfid); |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 314 | goto out; |
Steve French | 64cc2c6 | 2009-03-04 19:54:08 +0000 | [diff] [blame] | 315 | } else if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
| 316 | if (tcon->ses->serverNOS) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 317 | cERROR(1, "server %s of type %s returned" |
Steve French | 64cc2c6 | 2009-03-04 19:54:08 +0000 | [diff] [blame] | 318 | " unexpected error on SMB posix open" |
| 319 | ", disabling posix open support." |
| 320 | " Check if server update available.", |
| 321 | tcon->ses->serverName, |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 322 | tcon->ses->serverNOS); |
Steve French | 64cc2c6 | 2009-03-04 19:54:08 +0000 | [diff] [blame] | 323 | tcon->broken_posix_open = true; |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 324 | } else if ((rc != -EIO) && (rc != -EREMOTE) && |
| 325 | (rc != -EOPNOTSUPP)) /* path not found or net err */ |
| 326 | goto out; |
Steve French | 64cc2c6 | 2009-03-04 19:54:08 +0000 | [diff] [blame] | 327 | /* else fallthrough to retry open the old way on network i/o |
| 328 | or DFS errors */ |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 329 | } |
| 330 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | desiredAccess = cifs_convert_flags(file->f_flags); |
| 332 | |
| 333 | /********************************************************************* |
| 334 | * open flag mapping table: |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 335 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | * POSIX Flag CIFS Disposition |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 337 | * ---------- ---------------- |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | * O_CREAT FILE_OPEN_IF |
| 339 | * O_CREAT | O_EXCL FILE_CREATE |
| 340 | * O_CREAT | O_TRUNC FILE_OVERWRITE_IF |
| 341 | * O_TRUNC FILE_OVERWRITE |
| 342 | * none of the above FILE_OPEN |
| 343 | * |
| 344 | * Note that there is not a direct match between disposition |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 345 | * FILE_SUPERSEDE (ie create whether or not file exists although |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | * O_CREAT | O_TRUNC is similar but truncates the existing |
| 347 | * file rather than creating a new file as FILE_SUPERSEDE does |
| 348 | * (which uses the attributes / metadata passed in on open call) |
| 349 | *? |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 350 | *? O_SYNC is a reasonable match to CIFS writethrough flag |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | *? and the read write flags match reasonably. O_LARGEFILE |
| 352 | *? is irrelevant because largefile support is always used |
| 353 | *? by this client. Flags O_APPEND, O_DIRECT, O_DIRECTORY, |
| 354 | * O_FASYNC, O_NOFOLLOW, O_NONBLOCK need further investigation |
| 355 | *********************************************************************/ |
| 356 | |
| 357 | disposition = cifs_get_disposition(file->f_flags); |
| 358 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | /* BB pass O_SYNC flag through on file attributes .. BB */ |
| 360 | |
| 361 | /* Also refresh inode by passing in file_info buf returned by SMBOpen |
| 362 | and calling get_inode_info with returned buf (at least helps |
| 363 | non-Unix server case) */ |
| 364 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 365 | /* BB we can not do this if this is the second open of a file |
| 366 | and the first handle has writebehind data, we might be |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | able to simply do a filemap_fdatawrite/filemap_fdatawait first */ |
| 368 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
| 369 | if (!buf) { |
| 370 | rc = -ENOMEM; |
| 371 | goto out; |
| 372 | } |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 373 | |
| 374 | if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS) |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 375 | rc = CIFSSMBOpen(xid, tcon, full_path, disposition, |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 376 | desiredAccess, CREATE_NOT_DIR, &netfid, &oplock, buf, |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 377 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags |
| 378 | & CIFS_MOUNT_MAP_SPECIAL_CHR); |
Steve French | 5bafd76 | 2006-06-07 00:18:43 +0000 | [diff] [blame] | 379 | else |
| 380 | rc = -EIO; /* no NT SMB support fall into legacy open below */ |
| 381 | |
Steve French | a9d02ad | 2005-08-24 23:06:05 -0700 | [diff] [blame] | 382 | if (rc == -EIO) { |
| 383 | /* Old server, try legacy style OpenX */ |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 384 | rc = SMBLegacyOpen(xid, tcon, full_path, disposition, |
Steve French | a9d02ad | 2005-08-24 23:06:05 -0700 | [diff] [blame] | 385 | desiredAccess, CREATE_NOT_DIR, &netfid, &oplock, buf, |
| 386 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags |
| 387 | & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 388 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | if (rc) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 390 | cFYI(1, "cifs_open returned 0x%x", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | goto out; |
| 392 | } |
Jeff Layton | 3321b79 | 2009-09-25 09:53:37 -0400 | [diff] [blame] | 393 | |
Jeff Layton | 086f68b | 2009-09-21 14:08:18 -0400 | [diff] [blame] | 394 | pCifsFile = cifs_new_fileinfo(inode, netfid, file, file->f_path.mnt, |
| 395 | file->f_flags); |
| 396 | file->private_data = pCifsFile; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | if (file->private_data == NULL) { |
| 398 | rc = -ENOMEM; |
| 399 | goto out; |
| 400 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
Jeff Layton | 3321b79 | 2009-09-25 09:53:37 -0400 | [diff] [blame] | 402 | rc = cifs_open_inode_helper(inode, file, pCifsInode, pCifsFile, tcon, |
| 403 | &oplock, buf, full_path, xid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 405 | if (oplock & CIFS_CREATE_ACTION) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | /* time to set mode which we can not set earlier due to |
| 407 | problems creating new read-only files */ |
Steve French | 276a74a | 2009-03-03 18:00:34 +0000 | [diff] [blame] | 408 | if (tcon->unix_ext) { |
Jeff Layton | 4e1e7fb | 2008-08-02 07:26:12 -0400 | [diff] [blame] | 409 | struct cifs_unix_set_info_args args = { |
| 410 | .mode = inode->i_mode, |
| 411 | .uid = NO_CHANGE_64, |
| 412 | .gid = NO_CHANGE_64, |
| 413 | .ctime = NO_CHANGE_64, |
| 414 | .atime = NO_CHANGE_64, |
| 415 | .mtime = NO_CHANGE_64, |
| 416 | .device = 0, |
| 417 | }; |
Jeff Layton | 01ea95e | 2009-07-09 20:02:49 -0400 | [diff] [blame] | 418 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, |
| 419 | cifs_sb->local_nls, |
| 420 | cifs_sb->mnt_cifs_flags & |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 421 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | } |
| 423 | } |
| 424 | |
| 425 | out: |
| 426 | kfree(buf); |
| 427 | kfree(full_path); |
| 428 | FreeXid(xid); |
| 429 | return rc; |
| 430 | } |
| 431 | |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 432 | /* Try to reacquire byte range locks that were released when session */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | /* to server was lost */ |
| 434 | static int cifs_relock_file(struct cifsFileInfo *cifsFile) |
| 435 | { |
| 436 | int rc = 0; |
| 437 | |
| 438 | /* BB list all locks open on this file and relock */ |
| 439 | |
| 440 | return rc; |
| 441 | } |
| 442 | |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 443 | static int cifs_reopen_file(struct file *file, bool can_flush) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | { |
| 445 | int rc = -EACCES; |
Jeff Layton | 590a3fe | 2009-09-12 11:54:28 -0400 | [diff] [blame] | 446 | int xid; |
| 447 | __u32 oplock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | struct cifs_sb_info *cifs_sb; |
Steve French | 7fc8f4e | 2009-02-23 20:43:11 +0000 | [diff] [blame] | 449 | struct cifsTconInfo *tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | struct cifsFileInfo *pCifsFile; |
| 451 | struct cifsInodeInfo *pCifsInode; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 452 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | char *full_path = NULL; |
| 454 | int desiredAccess; |
| 455 | int disposition = FILE_OPEN; |
| 456 | __u16 netfid; |
| 457 | |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 458 | if (file->private_data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | pCifsFile = (struct cifsFileInfo *)file->private_data; |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 460 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | return -EBADF; |
| 462 | |
| 463 | xid = GetXid(); |
Jeff Layton | f0a71eb | 2009-06-27 07:04:55 -0400 | [diff] [blame] | 464 | mutex_lock(&pCifsFile->fh_mutex); |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 465 | if (!pCifsFile->invalidHandle) { |
Jeff Layton | f0a71eb | 2009-06-27 07:04:55 -0400 | [diff] [blame] | 466 | mutex_unlock(&pCifsFile->fh_mutex); |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 467 | rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | FreeXid(xid); |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 469 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | } |
| 471 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 472 | if (file->f_path.dentry == NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 473 | cERROR(1, "no valid name if dentry freed"); |
Steve French | 3a9f462 | 2007-04-04 17:10:24 +0000 | [diff] [blame] | 474 | dump_stack(); |
| 475 | rc = -EBADF; |
| 476 | goto reopen_error_exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | } |
Steve French | 3a9f462 | 2007-04-04 17:10:24 +0000 | [diff] [blame] | 478 | |
| 479 | inode = file->f_path.dentry->d_inode; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 480 | if (inode == NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 481 | cERROR(1, "inode not valid"); |
Steve French | 3a9f462 | 2007-04-04 17:10:24 +0000 | [diff] [blame] | 482 | dump_stack(); |
| 483 | rc = -EBADF; |
| 484 | goto reopen_error_exit; |
| 485 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 486 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | cifs_sb = CIFS_SB(inode->i_sb); |
Steve French | 7fc8f4e | 2009-02-23 20:43:11 +0000 | [diff] [blame] | 488 | tcon = cifs_sb->tcon; |
Steve French | 3a9f462 | 2007-04-04 17:10:24 +0000 | [diff] [blame] | 489 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | /* can not grab rename sem here because various ops, including |
| 491 | those that already have the rename sem can end up causing writepage |
| 492 | to get called and if the server was down that means we end up here, |
| 493 | and we can never tell if the caller already has the rename_sem */ |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 494 | full_path = build_path_from_dentry(file->f_path.dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | if (full_path == NULL) { |
Steve French | 3a9f462 | 2007-04-04 17:10:24 +0000 | [diff] [blame] | 496 | rc = -ENOMEM; |
| 497 | reopen_error_exit: |
Jeff Layton | f0a71eb | 2009-06-27 07:04:55 -0400 | [diff] [blame] | 498 | mutex_unlock(&pCifsFile->fh_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | FreeXid(xid); |
Steve French | 3a9f462 | 2007-04-04 17:10:24 +0000 | [diff] [blame] | 500 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
| 502 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 503 | cFYI(1, "inode = 0x%p file flags 0x%x for %s", |
| 504 | inode, file->f_flags, full_path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
| 506 | if (oplockEnabled) |
| 507 | oplock = REQ_OPLOCK; |
| 508 | else |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 509 | oplock = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | |
Steve French | 7fc8f4e | 2009-02-23 20:43:11 +0000 | [diff] [blame] | 511 | if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && |
| 512 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
| 513 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
| 514 | int oflags = (int) cifs_posix_convert_flags(file->f_flags); |
| 515 | /* can not refresh inode info since size could be stale */ |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame] | 516 | rc = cifs_posix_open(full_path, NULL, file->f_path.mnt, |
Steve French | fa588e0 | 2010-04-22 19:21:55 +0000 | [diff] [blame] | 517 | inode->i_sb, |
| 518 | cifs_sb->mnt_file_mode /* ignored */, |
| 519 | oflags, &oplock, &netfid, xid); |
Steve French | 7fc8f4e | 2009-02-23 20:43:11 +0000 | [diff] [blame] | 520 | if (rc == 0) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 521 | cFYI(1, "posix reopen succeeded"); |
Steve French | 7fc8f4e | 2009-02-23 20:43:11 +0000 | [diff] [blame] | 522 | goto reopen_success; |
| 523 | } |
| 524 | /* fallthrough to retry open the old way on errors, especially |
| 525 | in the reconnect path it is important to retry hard */ |
| 526 | } |
| 527 | |
| 528 | desiredAccess = cifs_convert_flags(file->f_flags); |
| 529 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | /* Can not refresh inode by passing in file_info buf to be returned |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 531 | by SMBOpen and then calling get_inode_info with returned buf |
| 532 | since file might have write behind data that needs to be flushed |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | and server version of file size can be stale. If we knew for sure |
| 534 | that inode was not dirty locally we could do this */ |
| 535 | |
Steve French | 7fc8f4e | 2009-02-23 20:43:11 +0000 | [diff] [blame] | 536 | rc = CIFSSMBOpen(xid, tcon, full_path, disposition, desiredAccess, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | CREATE_NOT_DIR, &netfid, &oplock, NULL, |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 538 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 539 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | if (rc) { |
Jeff Layton | f0a71eb | 2009-06-27 07:04:55 -0400 | [diff] [blame] | 541 | mutex_unlock(&pCifsFile->fh_mutex); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 542 | cFYI(1, "cifs_open returned 0x%x", rc); |
| 543 | cFYI(1, "oplock: %d", oplock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | } else { |
Steve French | 7fc8f4e | 2009-02-23 20:43:11 +0000 | [diff] [blame] | 545 | reopen_success: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | pCifsFile->netfid = netfid; |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 547 | pCifsFile->invalidHandle = false; |
Jeff Layton | f0a71eb | 2009-06-27 07:04:55 -0400 | [diff] [blame] | 548 | mutex_unlock(&pCifsFile->fh_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | pCifsInode = CIFS_I(inode); |
| 550 | if (pCifsInode) { |
| 551 | if (can_flush) { |
Jeff Layton | cea2180 | 2007-11-20 23:19:03 +0000 | [diff] [blame] | 552 | rc = filemap_write_and_wait(inode->i_mapping); |
| 553 | if (rc != 0) |
| 554 | CIFS_I(inode)->write_behind_rc = rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | /* temporarily disable caching while we |
| 556 | go to server to get inode info */ |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 557 | pCifsInode->clientCanCacheAll = false; |
| 558 | pCifsInode->clientCanCacheRead = false; |
Steve French | 7fc8f4e | 2009-02-23 20:43:11 +0000 | [diff] [blame] | 559 | if (tcon->unix_ext) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | rc = cifs_get_inode_info_unix(&inode, |
| 561 | full_path, inode->i_sb, xid); |
| 562 | else |
| 563 | rc = cifs_get_inode_info(&inode, |
| 564 | full_path, NULL, inode->i_sb, |
Steve French | 8b1327f | 2008-03-14 22:37:16 +0000 | [diff] [blame] | 565 | xid, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | } /* else we are writing out data to server already |
| 567 | and could deadlock if we tried to flush data, and |
| 568 | since we do not know if we have data that would |
| 569 | invalidate the current end of file on the server |
| 570 | we can not go to the server to get the new inod |
| 571 | info */ |
| 572 | if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) { |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 573 | pCifsInode->clientCanCacheAll = true; |
| 574 | pCifsInode->clientCanCacheRead = true; |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 575 | cFYI(1, "Exclusive Oplock granted on inode %p", |
| 576 | file->f_path.dentry->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | } else if ((oplock & 0xF) == OPLOCK_READ) { |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 578 | pCifsInode->clientCanCacheRead = true; |
| 579 | pCifsInode->clientCanCacheAll = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | } else { |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 581 | pCifsInode->clientCanCacheRead = false; |
| 582 | pCifsInode->clientCanCacheAll = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | } |
| 584 | cifs_relock_file(pCifsFile); |
| 585 | } |
| 586 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | kfree(full_path); |
| 588 | FreeXid(xid); |
| 589 | return rc; |
| 590 | } |
| 591 | |
| 592 | int cifs_close(struct inode *inode, struct file *file) |
| 593 | { |
| 594 | int rc = 0; |
Steve French | 1574532 | 2007-09-07 22:23:48 +0000 | [diff] [blame] | 595 | int xid, timeout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | struct cifs_sb_info *cifs_sb; |
| 597 | struct cifsTconInfo *pTcon; |
| 598 | struct cifsFileInfo *pSMBFile = |
| 599 | (struct cifsFileInfo *)file->private_data; |
| 600 | |
| 601 | xid = GetXid(); |
| 602 | |
| 603 | cifs_sb = CIFS_SB(inode->i_sb); |
| 604 | pTcon = cifs_sb->tcon; |
| 605 | if (pSMBFile) { |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 606 | struct cifsLockInfo *li, *tmp; |
Steve French | ddb4cbf | 2008-11-20 20:00:44 +0000 | [diff] [blame] | 607 | write_lock(&GlobalSMBSeslock); |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 608 | pSMBFile->closePend = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | if (pTcon) { |
| 610 | /* no sense reconnecting to close a file that is |
| 611 | already closed */ |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 612 | if (!pTcon->need_reconnect) { |
Steve French | ddb4cbf | 2008-11-20 20:00:44 +0000 | [diff] [blame] | 613 | write_unlock(&GlobalSMBSeslock); |
Steve French | 1574532 | 2007-09-07 22:23:48 +0000 | [diff] [blame] | 614 | timeout = 2; |
Dave Kleikamp | 6ab409b | 2009-08-31 11:07:12 -0400 | [diff] [blame] | 615 | while ((atomic_read(&pSMBFile->count) != 1) |
Steve French | 1574532 | 2007-09-07 22:23:48 +0000 | [diff] [blame] | 616 | && (timeout <= 2048)) { |
Steve French | 23e7dd7 | 2005-10-20 13:44:56 -0700 | [diff] [blame] | 617 | /* Give write a better chance to get to |
| 618 | server ahead of the close. We do not |
| 619 | want to add a wait_q here as it would |
| 620 | increase the memory utilization as |
| 621 | the struct would be in each open file, |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 622 | but this should give enough time to |
Steve French | 23e7dd7 | 2005-10-20 13:44:56 -0700 | [diff] [blame] | 623 | clear the socket */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 624 | cFYI(DBG2, "close delay, write pending"); |
Steve French | 23e7dd7 | 2005-10-20 13:44:56 -0700 | [diff] [blame] | 625 | msleep(timeout); |
| 626 | timeout *= 4; |
Steve French | 4891d53 | 2006-11-07 16:31:16 +0000 | [diff] [blame] | 627 | } |
Steve French | ddb4cbf | 2008-11-20 20:00:44 +0000 | [diff] [blame] | 628 | if (!pTcon->need_reconnect && |
| 629 | !pSMBFile->invalidHandle) |
| 630 | rc = CIFSSMBClose(xid, pTcon, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | pSMBFile->netfid); |
Steve French | ddb4cbf | 2008-11-20 20:00:44 +0000 | [diff] [blame] | 632 | } else |
| 633 | write_unlock(&GlobalSMBSeslock); |
| 634 | } else |
| 635 | write_unlock(&GlobalSMBSeslock); |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 636 | |
| 637 | /* Delete any outstanding lock records. |
| 638 | We'll lose them when the file is closed anyway. */ |
Roland Dreier | 796e566 | 2007-05-03 04:33:45 +0000 | [diff] [blame] | 639 | mutex_lock(&pSMBFile->lock_mutex); |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 640 | list_for_each_entry_safe(li, tmp, &pSMBFile->llist, llist) { |
| 641 | list_del(&li->llist); |
| 642 | kfree(li); |
| 643 | } |
Roland Dreier | 796e566 | 2007-05-03 04:33:45 +0000 | [diff] [blame] | 644 | mutex_unlock(&pSMBFile->lock_mutex); |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 645 | |
Steve French | cbe0476 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 646 | write_lock(&GlobalSMBSeslock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | list_del(&pSMBFile->flist); |
| 648 | list_del(&pSMBFile->tlist); |
Steve French | cbe0476 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 649 | write_unlock(&GlobalSMBSeslock); |
Dave Kleikamp | 6ab409b | 2009-08-31 11:07:12 -0400 | [diff] [blame] | 650 | cifsFileInfo_put(file->private_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | file->private_data = NULL; |
| 652 | } else |
| 653 | rc = -EBADF; |
| 654 | |
Steve French | 4efa53f | 2007-09-11 05:50:53 +0000 | [diff] [blame] | 655 | read_lock(&GlobalSMBSeslock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | if (list_empty(&(CIFS_I(inode)->openFileList))) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 657 | cFYI(1, "closing last open instance for inode %p", inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | /* if the file is not open we do not know if we can cache info |
| 659 | on this inode, much less write behind and read ahead */ |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 660 | CIFS_I(inode)->clientCanCacheRead = false; |
| 661 | CIFS_I(inode)->clientCanCacheAll = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | } |
Steve French | 4efa53f | 2007-09-11 05:50:53 +0000 | [diff] [blame] | 663 | read_unlock(&GlobalSMBSeslock); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 664 | if ((rc == 0) && CIFS_I(inode)->write_behind_rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | rc = CIFS_I(inode)->write_behind_rc; |
| 666 | FreeXid(xid); |
| 667 | return rc; |
| 668 | } |
| 669 | |
| 670 | int cifs_closedir(struct inode *inode, struct file *file) |
| 671 | { |
| 672 | int rc = 0; |
| 673 | int xid; |
| 674 | struct cifsFileInfo *pCFileStruct = |
| 675 | (struct cifsFileInfo *)file->private_data; |
| 676 | char *ptmp; |
| 677 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 678 | cFYI(1, "Closedir inode = 0x%p", inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | |
| 680 | xid = GetXid(); |
| 681 | |
| 682 | if (pCFileStruct) { |
| 683 | struct cifsTconInfo *pTcon; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 684 | struct cifs_sb_info *cifs_sb = |
| 685 | CIFS_SB(file->f_path.dentry->d_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | |
| 687 | pTcon = cifs_sb->tcon; |
| 688 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 689 | cFYI(1, "Freeing private data in close dir"); |
Steve French | ddb4cbf | 2008-11-20 20:00:44 +0000 | [diff] [blame] | 690 | write_lock(&GlobalSMBSeslock); |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 691 | if (!pCFileStruct->srch_inf.endOfSearch && |
| 692 | !pCFileStruct->invalidHandle) { |
| 693 | pCFileStruct->invalidHandle = true; |
Steve French | ddb4cbf | 2008-11-20 20:00:44 +0000 | [diff] [blame] | 694 | write_unlock(&GlobalSMBSeslock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | rc = CIFSFindClose(xid, pTcon, pCFileStruct->netfid); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 696 | cFYI(1, "Closing uncompleted readdir with rc %d", |
| 697 | rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | /* not much we can do if it fails anyway, ignore rc */ |
| 699 | rc = 0; |
Steve French | ddb4cbf | 2008-11-20 20:00:44 +0000 | [diff] [blame] | 700 | } else |
| 701 | write_unlock(&GlobalSMBSeslock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | ptmp = pCFileStruct->srch_inf.ntwrk_buf_start; |
| 703 | if (ptmp) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 704 | cFYI(1, "closedir free smb buf in srch struct"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | pCFileStruct->srch_inf.ntwrk_buf_start = NULL; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 706 | if (pCFileStruct->srch_inf.smallBuf) |
Steve French | d47d7c1 | 2006-02-28 03:45:48 +0000 | [diff] [blame] | 707 | cifs_small_buf_release(ptmp); |
| 708 | else |
| 709 | cifs_buf_release(ptmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | kfree(file->private_data); |
| 712 | file->private_data = NULL; |
| 713 | } |
| 714 | /* BB can we lock the filestruct while this is going on? */ |
| 715 | FreeXid(xid); |
| 716 | return rc; |
| 717 | } |
| 718 | |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 719 | static int store_file_lock(struct cifsFileInfo *fid, __u64 len, |
| 720 | __u64 offset, __u8 lockType) |
| 721 | { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 722 | struct cifsLockInfo *li = |
| 723 | kmalloc(sizeof(struct cifsLockInfo), GFP_KERNEL); |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 724 | if (li == NULL) |
| 725 | return -ENOMEM; |
| 726 | li->offset = offset; |
| 727 | li->length = len; |
| 728 | li->type = lockType; |
Roland Dreier | 796e566 | 2007-05-03 04:33:45 +0000 | [diff] [blame] | 729 | mutex_lock(&fid->lock_mutex); |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 730 | list_add(&li->llist, &fid->llist); |
Roland Dreier | 796e566 | 2007-05-03 04:33:45 +0000 | [diff] [blame] | 731 | mutex_unlock(&fid->lock_mutex); |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 732 | return 0; |
| 733 | } |
| 734 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock) |
| 736 | { |
| 737 | int rc, xid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | __u32 numLock = 0; |
| 739 | __u32 numUnlock = 0; |
| 740 | __u64 length; |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 741 | bool wait_flag = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | struct cifs_sb_info *cifs_sb; |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 743 | struct cifsTconInfo *tcon; |
Steve French | 08547b0 | 2006-02-28 22:39:25 +0000 | [diff] [blame] | 744 | __u16 netfid; |
| 745 | __u8 lockType = LOCKING_ANDX_LARGE_FILES; |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 746 | bool posix_locking = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | |
| 748 | length = 1 + pfLock->fl_end - pfLock->fl_start; |
| 749 | rc = -EACCES; |
| 750 | xid = GetXid(); |
| 751 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 752 | cFYI(1, "Lock parm: 0x%x flockflags: " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | "0x%x flocktype: 0x%x start: %lld end: %lld", |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 754 | cmd, pfLock->fl_flags, pfLock->fl_type, pfLock->fl_start, |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 755 | pfLock->fl_end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | |
| 757 | if (pfLock->fl_flags & FL_POSIX) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 758 | cFYI(1, "Posix"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | if (pfLock->fl_flags & FL_FLOCK) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 760 | cFYI(1, "Flock"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | if (pfLock->fl_flags & FL_SLEEP) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 762 | cFYI(1, "Blocking lock"); |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 763 | wait_flag = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | } |
| 765 | if (pfLock->fl_flags & FL_ACCESS) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 766 | cFYI(1, "Process suspended by mandatory locking - " |
| 767 | "not implemented yet"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | if (pfLock->fl_flags & FL_LEASE) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 769 | cFYI(1, "Lease on file - not implemented yet"); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 770 | if (pfLock->fl_flags & |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | (~(FL_POSIX | FL_FLOCK | FL_SLEEP | FL_ACCESS | FL_LEASE))) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 772 | cFYI(1, "Unknown lock flags 0x%x", pfLock->fl_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | |
| 774 | if (pfLock->fl_type == F_WRLCK) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 775 | cFYI(1, "F_WRLCK "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | numLock = 1; |
| 777 | } else if (pfLock->fl_type == F_UNLCK) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 778 | cFYI(1, "F_UNLCK"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | numUnlock = 1; |
Steve French | d47d7c1 | 2006-02-28 03:45:48 +0000 | [diff] [blame] | 780 | /* Check if unlock includes more than |
| 781 | one lock range */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | } else if (pfLock->fl_type == F_RDLCK) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 783 | cFYI(1, "F_RDLCK"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | lockType |= LOCKING_ANDX_SHARED_LOCK; |
| 785 | numLock = 1; |
| 786 | } else if (pfLock->fl_type == F_EXLCK) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 787 | cFYI(1, "F_EXLCK"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | numLock = 1; |
| 789 | } else if (pfLock->fl_type == F_SHLCK) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 790 | cFYI(1, "F_SHLCK"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | lockType |= LOCKING_ANDX_SHARED_LOCK; |
| 792 | numLock = 1; |
| 793 | } else |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 794 | cFYI(1, "Unknown type of lock"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 796 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 797 | tcon = cifs_sb->tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | |
| 799 | if (file->private_data == NULL) { |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 800 | rc = -EBADF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | FreeXid(xid); |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 802 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | } |
Steve French | 08547b0 | 2006-02-28 22:39:25 +0000 | [diff] [blame] | 804 | netfid = ((struct cifsFileInfo *)file->private_data)->netfid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 806 | if ((tcon->ses->capabilities & CAP_UNIX) && |
| 807 | (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && |
Steve French | acc18aa | 2008-12-02 18:53:55 +0000 | [diff] [blame] | 808 | ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 809 | posix_locking = 1; |
Steve French | 08547b0 | 2006-02-28 22:39:25 +0000 | [diff] [blame] | 810 | /* BB add code here to normalize offset and length to |
| 811 | account for negative length which we can not accept over the |
| 812 | wire */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | if (IS_GETLK(cmd)) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 814 | if (posix_locking) { |
Steve French | 08547b0 | 2006-02-28 22:39:25 +0000 | [diff] [blame] | 815 | int posix_lock_type; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 816 | if (lockType & LOCKING_ANDX_SHARED_LOCK) |
Steve French | 08547b0 | 2006-02-28 22:39:25 +0000 | [diff] [blame] | 817 | posix_lock_type = CIFS_RDLCK; |
| 818 | else |
| 819 | posix_lock_type = CIFS_WRLCK; |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 820 | rc = CIFSSMBPosixLock(xid, tcon, netfid, 1 /* get */, |
Steve French | fc94cdb | 2006-05-30 18:03:32 +0000 | [diff] [blame] | 821 | length, pfLock, |
Steve French | 08547b0 | 2006-02-28 22:39:25 +0000 | [diff] [blame] | 822 | posix_lock_type, wait_flag); |
| 823 | FreeXid(xid); |
| 824 | return rc; |
| 825 | } |
| 826 | |
| 827 | /* BB we could chain these into one lock request BB */ |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 828 | rc = CIFSSMBLock(xid, tcon, netfid, length, pfLock->fl_start, |
Steve French | 08547b0 | 2006-02-28 22:39:25 +0000 | [diff] [blame] | 829 | 0, 1, lockType, 0 /* wait flag */ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | if (rc == 0) { |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 831 | rc = CIFSSMBLock(xid, tcon, netfid, length, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | pfLock->fl_start, 1 /* numUnlock */ , |
| 833 | 0 /* numLock */ , lockType, |
| 834 | 0 /* wait flag */ ); |
| 835 | pfLock->fl_type = F_UNLCK; |
| 836 | if (rc != 0) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 837 | cERROR(1, "Error unlocking previously locked " |
| 838 | "range %d during test of lock", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | rc = 0; |
| 840 | |
| 841 | } else { |
| 842 | /* if rc == ERR_SHARING_VIOLATION ? */ |
Pavel Shilovsky | f05337c | 2010-04-05 09:59:14 +0400 | [diff] [blame] | 843 | rc = 0; |
| 844 | |
| 845 | if (lockType & LOCKING_ANDX_SHARED_LOCK) { |
| 846 | pfLock->fl_type = F_WRLCK; |
| 847 | } else { |
| 848 | rc = CIFSSMBLock(xid, tcon, netfid, length, |
| 849 | pfLock->fl_start, 0, 1, |
| 850 | lockType | LOCKING_ANDX_SHARED_LOCK, |
| 851 | 0 /* wait flag */); |
| 852 | if (rc == 0) { |
| 853 | rc = CIFSSMBLock(xid, tcon, netfid, |
| 854 | length, pfLock->fl_start, 1, 0, |
| 855 | lockType | |
| 856 | LOCKING_ANDX_SHARED_LOCK, |
| 857 | 0 /* wait flag */); |
| 858 | pfLock->fl_type = F_RDLCK; |
| 859 | if (rc != 0) |
Steve French | f19159d | 2010-04-21 04:12:10 +0000 | [diff] [blame] | 860 | cERROR(1, "Error unlocking " |
Pavel Shilovsky | f05337c | 2010-04-05 09:59:14 +0400 | [diff] [blame] | 861 | "previously locked range %d " |
Steve French | f19159d | 2010-04-21 04:12:10 +0000 | [diff] [blame] | 862 | "during test of lock", rc); |
Pavel Shilovsky | f05337c | 2010-04-05 09:59:14 +0400 | [diff] [blame] | 863 | rc = 0; |
| 864 | } else { |
| 865 | pfLock->fl_type = F_WRLCK; |
| 866 | rc = 0; |
| 867 | } |
| 868 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | } |
| 870 | |
| 871 | FreeXid(xid); |
| 872 | return rc; |
| 873 | } |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 874 | |
| 875 | if (!numLock && !numUnlock) { |
| 876 | /* if no lock or unlock then nothing |
| 877 | to do since we do not know what it is */ |
| 878 | FreeXid(xid); |
| 879 | return -EOPNOTSUPP; |
| 880 | } |
| 881 | |
| 882 | if (posix_locking) { |
Steve French | 08547b0 | 2006-02-28 22:39:25 +0000 | [diff] [blame] | 883 | int posix_lock_type; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 884 | if (lockType & LOCKING_ANDX_SHARED_LOCK) |
Steve French | 08547b0 | 2006-02-28 22:39:25 +0000 | [diff] [blame] | 885 | posix_lock_type = CIFS_RDLCK; |
| 886 | else |
| 887 | posix_lock_type = CIFS_WRLCK; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 888 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 889 | if (numUnlock == 1) |
Steve French | beb84dc | 2006-03-03 23:36:34 +0000 | [diff] [blame] | 890 | posix_lock_type = CIFS_UNLCK; |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 891 | |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 892 | rc = CIFSSMBPosixLock(xid, tcon, netfid, 0 /* set */, |
Steve French | fc94cdb | 2006-05-30 18:03:32 +0000 | [diff] [blame] | 893 | length, pfLock, |
Steve French | 08547b0 | 2006-02-28 22:39:25 +0000 | [diff] [blame] | 894 | posix_lock_type, wait_flag); |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 895 | } else { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 896 | struct cifsFileInfo *fid = |
| 897 | (struct cifsFileInfo *)file->private_data; |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 898 | |
| 899 | if (numLock) { |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 900 | rc = CIFSSMBLock(xid, tcon, netfid, length, |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 901 | pfLock->fl_start, |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 902 | 0, numLock, lockType, wait_flag); |
| 903 | |
| 904 | if (rc == 0) { |
| 905 | /* For Windows locks we must store them. */ |
| 906 | rc = store_file_lock(fid, length, |
| 907 | pfLock->fl_start, lockType); |
| 908 | } |
| 909 | } else if (numUnlock) { |
| 910 | /* For each stored lock that this unlock overlaps |
| 911 | completely, unlock it. */ |
| 912 | int stored_rc = 0; |
| 913 | struct cifsLockInfo *li, *tmp; |
| 914 | |
Steve French | 6b70c95 | 2006-09-21 07:35:29 +0000 | [diff] [blame] | 915 | rc = 0; |
Roland Dreier | 796e566 | 2007-05-03 04:33:45 +0000 | [diff] [blame] | 916 | mutex_lock(&fid->lock_mutex); |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 917 | list_for_each_entry_safe(li, tmp, &fid->llist, llist) { |
| 918 | if (pfLock->fl_start <= li->offset && |
Steve French | c19eb71 | 2007-08-24 03:22:48 +0000 | [diff] [blame] | 919 | (pfLock->fl_start + length) >= |
Jeff Layton | 39db810 | 2007-08-24 03:16:51 +0000 | [diff] [blame] | 920 | (li->offset + li->length)) { |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 921 | stored_rc = CIFSSMBLock(xid, tcon, |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 922 | netfid, |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 923 | li->length, li->offset, |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 924 | 1, 0, li->type, false); |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 925 | if (stored_rc) |
| 926 | rc = stored_rc; |
Pavel Shilovsky | 2c964d1 | 2010-04-21 19:44:24 +0000 | [diff] [blame] | 927 | else { |
| 928 | list_del(&li->llist); |
| 929 | kfree(li); |
| 930 | } |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 931 | } |
| 932 | } |
Roland Dreier | 796e566 | 2007-05-03 04:33:45 +0000 | [diff] [blame] | 933 | mutex_unlock(&fid->lock_mutex); |
Jeremy Allison | 7ee1af7 | 2006-08-02 21:56:33 +0000 | [diff] [blame] | 934 | } |
| 935 | } |
| 936 | |
Steve French | d634cc1 | 2005-08-26 14:42:59 -0500 | [diff] [blame] | 937 | if (pfLock->fl_flags & FL_POSIX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | posix_lock_file_wait(file, pfLock); |
| 939 | FreeXid(xid); |
| 940 | return rc; |
| 941 | } |
| 942 | |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 943 | /* |
| 944 | * Set the timeout on write requests past EOF. For some servers (Windows) |
| 945 | * these calls can be very long. |
| 946 | * |
| 947 | * If we're writing >10M past the EOF we give a 180s timeout. Anything less |
| 948 | * than that gets a 45s timeout. Writes not past EOF get 15s timeouts. |
| 949 | * The 10M cutoff is totally arbitrary. A better scheme for this would be |
| 950 | * welcome if someone wants to suggest one. |
| 951 | * |
| 952 | * We may be able to do a better job with this if there were some way to |
| 953 | * declare that a file should be sparse. |
| 954 | */ |
| 955 | static int |
| 956 | cifs_write_timeout(struct cifsInodeInfo *cifsi, loff_t offset) |
| 957 | { |
| 958 | if (offset <= cifsi->server_eof) |
| 959 | return CIFS_STD_OP; |
| 960 | else if (offset > (cifsi->server_eof + (10 * 1024 * 1024))) |
| 961 | return CIFS_VLONG_OP; |
| 962 | else |
| 963 | return CIFS_LONG_OP; |
| 964 | } |
| 965 | |
| 966 | /* update the file size (if needed) after a write */ |
| 967 | static void |
| 968 | cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset, |
| 969 | unsigned int bytes_written) |
| 970 | { |
| 971 | loff_t end_of_write = offset + bytes_written; |
| 972 | |
| 973 | if (end_of_write > cifsi->server_eof) |
| 974 | cifsi->server_eof = end_of_write; |
| 975 | } |
| 976 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | ssize_t cifs_user_write(struct file *file, const char __user *write_data, |
| 978 | size_t write_size, loff_t *poffset) |
| 979 | { |
| 980 | int rc = 0; |
| 981 | unsigned int bytes_written = 0; |
| 982 | unsigned int total_written; |
| 983 | struct cifs_sb_info *cifs_sb; |
| 984 | struct cifsTconInfo *pTcon; |
| 985 | int xid, long_op; |
| 986 | struct cifsFileInfo *open_file; |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 987 | struct cifsInodeInfo *cifsi = CIFS_I(file->f_path.dentry->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 989 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | |
| 991 | pTcon = cifs_sb->tcon; |
| 992 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 993 | /* cFYI(1, " write %d bytes to offset %lld of %s", write_size, |
| 994 | *poffset, file->f_path.dentry->d_name.name); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | |
| 996 | if (file->private_data == NULL) |
| 997 | return -EBADF; |
Christoph Hellwig | c33f8d3 | 2007-04-02 18:47:20 +0000 | [diff] [blame] | 998 | open_file = (struct cifsFileInfo *) file->private_data; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 999 | |
Jeff Layton | 838726c | 2008-08-28 07:54:59 -0400 | [diff] [blame] | 1000 | rc = generic_write_checks(file, poffset, &write_size, 0); |
| 1001 | if (rc) |
| 1002 | return rc; |
| 1003 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | xid = GetXid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 1006 | long_op = cifs_write_timeout(cifsi, *poffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | for (total_written = 0; write_size > total_written; |
| 1008 | total_written += bytes_written) { |
| 1009 | rc = -EAGAIN; |
| 1010 | while (rc == -EAGAIN) { |
| 1011 | if (file->private_data == NULL) { |
| 1012 | /* file has been closed on us */ |
| 1013 | FreeXid(xid); |
| 1014 | /* if we have gotten here we have written some data |
| 1015 | and blocked, and the file has been freed on us while |
| 1016 | we blocked so return what we managed to write */ |
| 1017 | return total_written; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1018 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | if (open_file->closePend) { |
| 1020 | FreeXid(xid); |
| 1021 | if (total_written) |
| 1022 | return total_written; |
| 1023 | else |
| 1024 | return -EBADF; |
| 1025 | } |
| 1026 | if (open_file->invalidHandle) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | /* we could deadlock if we called |
| 1028 | filemap_fdatawait from here so tell |
| 1029 | reopen_file not to flush data to server |
| 1030 | now */ |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 1031 | rc = cifs_reopen_file(file, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | if (rc != 0) |
| 1033 | break; |
| 1034 | } |
| 1035 | |
| 1036 | rc = CIFSSMBWrite(xid, pTcon, |
| 1037 | open_file->netfid, |
| 1038 | min_t(const int, cifs_sb->wsize, |
| 1039 | write_size - total_written), |
| 1040 | *poffset, &bytes_written, |
| 1041 | NULL, write_data + total_written, long_op); |
| 1042 | } |
| 1043 | if (rc || (bytes_written == 0)) { |
| 1044 | if (total_written) |
| 1045 | break; |
| 1046 | else { |
| 1047 | FreeXid(xid); |
| 1048 | return rc; |
| 1049 | } |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 1050 | } else { |
| 1051 | cifs_update_eof(cifsi, *poffset, bytes_written); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | *poffset += bytes_written; |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 1053 | } |
Steve French | 133672e | 2007-11-13 22:41:37 +0000 | [diff] [blame] | 1054 | long_op = CIFS_STD_OP; /* subsequent writes fast - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | 15 seconds is plenty */ |
| 1056 | } |
| 1057 | |
Steve French | a454434 | 2005-08-24 13:59:35 -0700 | [diff] [blame] | 1058 | cifs_stats_bytes_written(pTcon, total_written); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | |
| 1060 | /* since the write may have blocked check these pointers again */ |
Steve French | 3677db1 | 2007-02-26 16:46:11 +0000 | [diff] [blame] | 1061 | if ((file->f_path.dentry) && (file->f_path.dentry->d_inode)) { |
| 1062 | struct inode *inode = file->f_path.dentry->d_inode; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1063 | /* Do not update local mtime - server will set its actual value on write |
| 1064 | * inode->i_ctime = inode->i_mtime = |
Steve French | 3677db1 | 2007-02-26 16:46:11 +0000 | [diff] [blame] | 1065 | * current_fs_time(inode->i_sb);*/ |
| 1066 | if (total_written > 0) { |
| 1067 | spin_lock(&inode->i_lock); |
| 1068 | if (*poffset > file->f_path.dentry->d_inode->i_size) |
| 1069 | i_size_write(file->f_path.dentry->d_inode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | *poffset); |
Steve French | 3677db1 | 2007-02-26 16:46:11 +0000 | [diff] [blame] | 1071 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | } |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1073 | mark_inode_dirty_sync(file->f_path.dentry->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | } |
| 1075 | FreeXid(xid); |
| 1076 | return total_written; |
| 1077 | } |
| 1078 | |
| 1079 | static ssize_t cifs_write(struct file *file, const char *write_data, |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 1080 | size_t write_size, loff_t *poffset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | { |
| 1082 | int rc = 0; |
| 1083 | unsigned int bytes_written = 0; |
| 1084 | unsigned int total_written; |
| 1085 | struct cifs_sb_info *cifs_sb; |
| 1086 | struct cifsTconInfo *pTcon; |
| 1087 | int xid, long_op; |
| 1088 | struct cifsFileInfo *open_file; |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 1089 | struct cifsInodeInfo *cifsi = CIFS_I(file->f_path.dentry->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 1091 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | |
| 1093 | pTcon = cifs_sb->tcon; |
| 1094 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1095 | cFYI(1, "write %zd bytes to offset %lld of %s", write_size, |
| 1096 | *poffset, file->f_path.dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | |
| 1098 | if (file->private_data == NULL) |
| 1099 | return -EBADF; |
Christoph Hellwig | c33f8d3 | 2007-04-02 18:47:20 +0000 | [diff] [blame] | 1100 | open_file = (struct cifsFileInfo *)file->private_data; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | xid = GetXid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 1104 | long_op = cifs_write_timeout(cifsi, *poffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | for (total_written = 0; write_size > total_written; |
| 1106 | total_written += bytes_written) { |
| 1107 | rc = -EAGAIN; |
| 1108 | while (rc == -EAGAIN) { |
| 1109 | if (file->private_data == NULL) { |
| 1110 | /* file has been closed on us */ |
| 1111 | FreeXid(xid); |
| 1112 | /* if we have gotten here we have written some data |
| 1113 | and blocked, and the file has been freed on us |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1114 | while we blocked so return what we managed to |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | write */ |
| 1116 | return total_written; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1117 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | if (open_file->closePend) { |
| 1119 | FreeXid(xid); |
| 1120 | if (total_written) |
| 1121 | return total_written; |
| 1122 | else |
| 1123 | return -EBADF; |
| 1124 | } |
| 1125 | if (open_file->invalidHandle) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | /* we could deadlock if we called |
| 1127 | filemap_fdatawait from here so tell |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1128 | reopen_file not to flush data to |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | server now */ |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 1130 | rc = cifs_reopen_file(file, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | if (rc != 0) |
| 1132 | break; |
| 1133 | } |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1134 | if (experimEnabled || (pTcon->ses->server && |
| 1135 | ((pTcon->ses->server->secMode & |
Steve French | 0877583 | 2006-05-30 18:08:26 +0000 | [diff] [blame] | 1136 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
Steve French | c01f36a | 2006-05-30 18:05:10 +0000 | [diff] [blame] | 1137 | == 0))) { |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 1138 | struct kvec iov[2]; |
| 1139 | unsigned int len; |
| 1140 | |
Steve French | 0ae0efa | 2005-10-10 10:57:19 -0700 | [diff] [blame] | 1141 | len = min((size_t)cifs_sb->wsize, |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 1142 | write_size - total_written); |
| 1143 | /* iov[0] is reserved for smb header */ |
| 1144 | iov[1].iov_base = (char *)write_data + |
| 1145 | total_written; |
| 1146 | iov[1].iov_len = len; |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 1147 | rc = CIFSSMBWrite2(xid, pTcon, |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 1148 | open_file->netfid, len, |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 1149 | *poffset, &bytes_written, |
Steve French | 3e84469 | 2005-10-03 13:37:24 -0700 | [diff] [blame] | 1150 | iov, 1, long_op); |
Steve French | d6e04ae | 2005-06-13 13:24:43 -0500 | [diff] [blame] | 1151 | } else |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 1152 | rc = CIFSSMBWrite(xid, pTcon, |
| 1153 | open_file->netfid, |
| 1154 | min_t(const int, cifs_sb->wsize, |
| 1155 | write_size - total_written), |
| 1156 | *poffset, &bytes_written, |
| 1157 | write_data + total_written, |
| 1158 | NULL, long_op); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | } |
| 1160 | if (rc || (bytes_written == 0)) { |
| 1161 | if (total_written) |
| 1162 | break; |
| 1163 | else { |
| 1164 | FreeXid(xid); |
| 1165 | return rc; |
| 1166 | } |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 1167 | } else { |
| 1168 | cifs_update_eof(cifsi, *poffset, bytes_written); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | *poffset += bytes_written; |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 1170 | } |
Steve French | 133672e | 2007-11-13 22:41:37 +0000 | [diff] [blame] | 1171 | long_op = CIFS_STD_OP; /* subsequent writes fast - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | 15 seconds is plenty */ |
| 1173 | } |
| 1174 | |
Steve French | a454434 | 2005-08-24 13:59:35 -0700 | [diff] [blame] | 1175 | cifs_stats_bytes_written(pTcon, total_written); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | |
| 1177 | /* since the write may have blocked check these pointers again */ |
Steve French | 3677db1 | 2007-02-26 16:46:11 +0000 | [diff] [blame] | 1178 | if ((file->f_path.dentry) && (file->f_path.dentry->d_inode)) { |
Steve French | 004c46b | 2007-02-17 04:34:13 +0000 | [diff] [blame] | 1179 | /*BB We could make this contingent on superblock ATIME flag too */ |
Steve French | 3677db1 | 2007-02-26 16:46:11 +0000 | [diff] [blame] | 1180 | /* file->f_path.dentry->d_inode->i_ctime = |
| 1181 | file->f_path.dentry->d_inode->i_mtime = CURRENT_TIME;*/ |
| 1182 | if (total_written > 0) { |
| 1183 | spin_lock(&file->f_path.dentry->d_inode->i_lock); |
| 1184 | if (*poffset > file->f_path.dentry->d_inode->i_size) |
| 1185 | i_size_write(file->f_path.dentry->d_inode, |
| 1186 | *poffset); |
| 1187 | spin_unlock(&file->f_path.dentry->d_inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | } |
Steve French | 3677db1 | 2007-02-26 16:46:11 +0000 | [diff] [blame] | 1189 | mark_inode_dirty_sync(file->f_path.dentry->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | } |
| 1191 | FreeXid(xid); |
| 1192 | return total_written; |
| 1193 | } |
| 1194 | |
Steve French | 630f3f0c | 2007-10-25 21:17:17 +0000 | [diff] [blame] | 1195 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
| 1196 | struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode) |
| 1197 | { |
| 1198 | struct cifsFileInfo *open_file = NULL; |
| 1199 | |
| 1200 | read_lock(&GlobalSMBSeslock); |
| 1201 | /* we could simply get the first_list_entry since write-only entries |
| 1202 | are always at the end of the list but since the first entry might |
| 1203 | have a close pending, we go through the whole list */ |
| 1204 | list_for_each_entry(open_file, &cifs_inode->openFileList, flist) { |
| 1205 | if (open_file->closePend) |
| 1206 | continue; |
| 1207 | if (open_file->pfile && ((open_file->pfile->f_flags & O_RDWR) || |
| 1208 | (open_file->pfile->f_flags & O_RDONLY))) { |
| 1209 | if (!open_file->invalidHandle) { |
| 1210 | /* found a good file */ |
| 1211 | /* lock it so it will not be closed on us */ |
Dave Kleikamp | 6ab409b | 2009-08-31 11:07:12 -0400 | [diff] [blame] | 1212 | cifsFileInfo_get(open_file); |
Steve French | 630f3f0c | 2007-10-25 21:17:17 +0000 | [diff] [blame] | 1213 | read_unlock(&GlobalSMBSeslock); |
| 1214 | return open_file; |
| 1215 | } /* else might as well continue, and look for |
| 1216 | another, or simply have the caller reopen it |
| 1217 | again rather than trying to fix this handle */ |
| 1218 | } else /* write only file */ |
| 1219 | break; /* write only files are last so must be done */ |
| 1220 | } |
| 1221 | read_unlock(&GlobalSMBSeslock); |
| 1222 | return NULL; |
| 1223 | } |
| 1224 | #endif |
| 1225 | |
Steve French | dd99cd8 | 2005-10-05 19:32:49 -0700 | [diff] [blame] | 1226 | struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode) |
Steve French | 6148a74 | 2005-10-05 12:23:19 -0700 | [diff] [blame] | 1227 | { |
| 1228 | struct cifsFileInfo *open_file; |
Jeff Layton | 2846d38 | 2008-09-22 21:33:33 -0400 | [diff] [blame] | 1229 | bool any_available = false; |
Steve French | dd99cd8 | 2005-10-05 19:32:49 -0700 | [diff] [blame] | 1230 | int rc; |
Steve French | 6148a74 | 2005-10-05 12:23:19 -0700 | [diff] [blame] | 1231 | |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 1232 | /* Having a null inode here (because mapping->host was set to zero by |
| 1233 | the VFS or MM) should not happen but we had reports of on oops (due to |
| 1234 | it being zero) during stress testcases so we need to check for it */ |
| 1235 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1236 | if (cifs_inode == NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1237 | cERROR(1, "Null inode passed to cifs_writeable_file"); |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 1238 | dump_stack(); |
| 1239 | return NULL; |
| 1240 | } |
| 1241 | |
Steve French | 6148a74 | 2005-10-05 12:23:19 -0700 | [diff] [blame] | 1242 | read_lock(&GlobalSMBSeslock); |
Steve French | 9b22b0b | 2007-10-02 01:11:08 +0000 | [diff] [blame] | 1243 | refind_writable: |
Steve French | 6148a74 | 2005-10-05 12:23:19 -0700 | [diff] [blame] | 1244 | list_for_each_entry(open_file, &cifs_inode->openFileList, flist) { |
Jeff Layton | 2846d38 | 2008-09-22 21:33:33 -0400 | [diff] [blame] | 1245 | if (open_file->closePend || |
| 1246 | (!any_available && open_file->pid != current->tgid)) |
Steve French | 6148a74 | 2005-10-05 12:23:19 -0700 | [diff] [blame] | 1247 | continue; |
Jeff Layton | 2846d38 | 2008-09-22 21:33:33 -0400 | [diff] [blame] | 1248 | |
Steve French | 6148a74 | 2005-10-05 12:23:19 -0700 | [diff] [blame] | 1249 | if (open_file->pfile && |
| 1250 | ((open_file->pfile->f_flags & O_RDWR) || |
| 1251 | (open_file->pfile->f_flags & O_WRONLY))) { |
Dave Kleikamp | 6ab409b | 2009-08-31 11:07:12 -0400 | [diff] [blame] | 1252 | cifsFileInfo_get(open_file); |
Steve French | 9b22b0b | 2007-10-02 01:11:08 +0000 | [diff] [blame] | 1253 | |
| 1254 | if (!open_file->invalidHandle) { |
| 1255 | /* found a good writable file */ |
| 1256 | read_unlock(&GlobalSMBSeslock); |
| 1257 | return open_file; |
| 1258 | } |
Steve French | 8840dee | 2007-11-16 23:05:52 +0000 | [diff] [blame] | 1259 | |
Steve French | 6148a74 | 2005-10-05 12:23:19 -0700 | [diff] [blame] | 1260 | read_unlock(&GlobalSMBSeslock); |
Steve French | 9b22b0b | 2007-10-02 01:11:08 +0000 | [diff] [blame] | 1261 | /* Had to unlock since following call can block */ |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 1262 | rc = cifs_reopen_file(open_file->pfile, false); |
Steve French | 8840dee | 2007-11-16 23:05:52 +0000 | [diff] [blame] | 1263 | if (!rc) { |
Steve French | 9b22b0b | 2007-10-02 01:11:08 +0000 | [diff] [blame] | 1264 | if (!open_file->closePend) |
| 1265 | return open_file; |
| 1266 | else { /* start over in case this was deleted */ |
| 1267 | /* since the list could be modified */ |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1268 | read_lock(&GlobalSMBSeslock); |
Dave Kleikamp | 6ab409b | 2009-08-31 11:07:12 -0400 | [diff] [blame] | 1269 | cifsFileInfo_put(open_file); |
Steve French | 9b22b0b | 2007-10-02 01:11:08 +0000 | [diff] [blame] | 1270 | goto refind_writable; |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1271 | } |
| 1272 | } |
Steve French | 9b22b0b | 2007-10-02 01:11:08 +0000 | [diff] [blame] | 1273 | |
| 1274 | /* if it fails, try another handle if possible - |
| 1275 | (we can not do this if closePending since |
| 1276 | loop could be modified - in which case we |
| 1277 | have to start at the beginning of the list |
| 1278 | again. Note that it would be bad |
| 1279 | to hold up writepages here (rather than |
| 1280 | in caller) with continuous retries */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1281 | cFYI(1, "wp failed on reopen file"); |
Steve French | 9b22b0b | 2007-10-02 01:11:08 +0000 | [diff] [blame] | 1282 | read_lock(&GlobalSMBSeslock); |
| 1283 | /* can not use this handle, no write |
| 1284 | pending on this one after all */ |
Dave Kleikamp | 6ab409b | 2009-08-31 11:07:12 -0400 | [diff] [blame] | 1285 | cifsFileInfo_put(open_file); |
Steve French | 8840dee | 2007-11-16 23:05:52 +0000 | [diff] [blame] | 1286 | |
Steve French | 9b22b0b | 2007-10-02 01:11:08 +0000 | [diff] [blame] | 1287 | if (open_file->closePend) /* list could have changed */ |
| 1288 | goto refind_writable; |
| 1289 | /* else we simply continue to the next entry. Thus |
| 1290 | we do not loop on reopen errors. If we |
| 1291 | can not reopen the file, for example if we |
| 1292 | reconnected to a server with another client |
| 1293 | racing to delete or lock the file we would not |
| 1294 | make progress if we restarted before the beginning |
| 1295 | of the loop here. */ |
Steve French | 6148a74 | 2005-10-05 12:23:19 -0700 | [diff] [blame] | 1296 | } |
| 1297 | } |
Jeff Layton | 2846d38 | 2008-09-22 21:33:33 -0400 | [diff] [blame] | 1298 | /* couldn't find useable FH with same pid, try any available */ |
| 1299 | if (!any_available) { |
| 1300 | any_available = true; |
| 1301 | goto refind_writable; |
| 1302 | } |
Steve French | 6148a74 | 2005-10-05 12:23:19 -0700 | [diff] [blame] | 1303 | read_unlock(&GlobalSMBSeslock); |
| 1304 | return NULL; |
| 1305 | } |
| 1306 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to) |
| 1308 | { |
| 1309 | struct address_space *mapping = page->mapping; |
| 1310 | loff_t offset = (loff_t)page->index << PAGE_CACHE_SHIFT; |
| 1311 | char *write_data; |
| 1312 | int rc = -EFAULT; |
| 1313 | int bytes_written = 0; |
| 1314 | struct cifs_sb_info *cifs_sb; |
| 1315 | struct cifsTconInfo *pTcon; |
| 1316 | struct inode *inode; |
Steve French | 6148a74 | 2005-10-05 12:23:19 -0700 | [diff] [blame] | 1317 | struct cifsFileInfo *open_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | |
| 1319 | if (!mapping || !mapping->host) |
| 1320 | return -EFAULT; |
| 1321 | |
| 1322 | inode = page->mapping->host; |
| 1323 | cifs_sb = CIFS_SB(inode->i_sb); |
| 1324 | pTcon = cifs_sb->tcon; |
| 1325 | |
| 1326 | offset += (loff_t)from; |
| 1327 | write_data = kmap(page); |
| 1328 | write_data += from; |
| 1329 | |
| 1330 | if ((to > PAGE_CACHE_SIZE) || (from > to)) { |
| 1331 | kunmap(page); |
| 1332 | return -EIO; |
| 1333 | } |
| 1334 | |
| 1335 | /* racing with truncate? */ |
| 1336 | if (offset > mapping->host->i_size) { |
| 1337 | kunmap(page); |
| 1338 | return 0; /* don't care */ |
| 1339 | } |
| 1340 | |
| 1341 | /* check to make sure that we are not extending the file */ |
| 1342 | if (mapping->host->i_size - offset < (loff_t)to) |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1343 | to = (unsigned)(mapping->host->i_size - offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | |
Steve French | 6148a74 | 2005-10-05 12:23:19 -0700 | [diff] [blame] | 1345 | open_file = find_writable_file(CIFS_I(mapping->host)); |
| 1346 | if (open_file) { |
| 1347 | bytes_written = cifs_write(open_file->pfile, write_data, |
| 1348 | to-from, &offset); |
Dave Kleikamp | 6ab409b | 2009-08-31 11:07:12 -0400 | [diff] [blame] | 1349 | cifsFileInfo_put(open_file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | /* Does mm or vfs already set times? */ |
Steve French | 6148a74 | 2005-10-05 12:23:19 -0700 | [diff] [blame] | 1351 | inode->i_atime = inode->i_mtime = current_fs_time(inode->i_sb); |
Steve French | bb5a9a0 | 2007-12-31 04:21:29 +0000 | [diff] [blame] | 1352 | if ((bytes_written > 0) && (offset)) |
Steve French | 6148a74 | 2005-10-05 12:23:19 -0700 | [diff] [blame] | 1353 | rc = 0; |
Steve French | bb5a9a0 | 2007-12-31 04:21:29 +0000 | [diff] [blame] | 1354 | else if (bytes_written < 0) |
| 1355 | rc = bytes_written; |
Steve French | 6148a74 | 2005-10-05 12:23:19 -0700 | [diff] [blame] | 1356 | } else { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1357 | cFYI(1, "No writeable filehandles for inode"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | rc = -EIO; |
| 1359 | } |
| 1360 | |
| 1361 | kunmap(page); |
| 1362 | return rc; |
| 1363 | } |
| 1364 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | static int cifs_writepages(struct address_space *mapping, |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1366 | struct writeback_control *wbc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | { |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1368 | struct backing_dev_info *bdi = mapping->backing_dev_info; |
| 1369 | unsigned int bytes_to_write; |
| 1370 | unsigned int bytes_written; |
| 1371 | struct cifs_sb_info *cifs_sb; |
| 1372 | int done = 0; |
OGAWA Hirofumi | 111ebb6 | 2006-06-23 02:03:26 -0700 | [diff] [blame] | 1373 | pgoff_t end; |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1374 | pgoff_t index; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1375 | int range_whole = 0; |
| 1376 | struct kvec *iov; |
Steve French | 84d2f07 | 2005-10-12 15:32:05 -0700 | [diff] [blame] | 1377 | int len; |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1378 | int n_iov = 0; |
| 1379 | pgoff_t next; |
| 1380 | int nr_pages; |
| 1381 | __u64 offset = 0; |
Steve French | 23e7dd7 | 2005-10-20 13:44:56 -0700 | [diff] [blame] | 1382 | struct cifsFileInfo *open_file; |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 1383 | struct cifsInodeInfo *cifsi = CIFS_I(mapping->host); |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1384 | struct page *page; |
| 1385 | struct pagevec pvec; |
| 1386 | int rc = 0; |
| 1387 | int scanned = 0; |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 1388 | int xid, long_op; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1390 | cifs_sb = CIFS_SB(mapping->host->i_sb); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1391 | |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1392 | /* |
| 1393 | * If wsize is smaller that the page cache size, default to writing |
| 1394 | * one page at a time via cifs_writepage |
| 1395 | */ |
| 1396 | if (cifs_sb->wsize < PAGE_CACHE_SIZE) |
| 1397 | return generic_writepages(mapping, wbc); |
| 1398 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1399 | if ((cifs_sb->tcon->ses) && (cifs_sb->tcon->ses->server)) |
| 1400 | if (cifs_sb->tcon->ses->server->secMode & |
| 1401 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
| 1402 | if (!experimEnabled) |
Steve French | 6080823 | 2006-04-22 15:53:05 +0000 | [diff] [blame] | 1403 | return generic_writepages(mapping, wbc); |
Steve French | 4a77118 | 2005-10-05 15:14:33 -0700 | [diff] [blame] | 1404 | |
Steve French | 9a0c823 | 2007-02-02 04:21:57 +0000 | [diff] [blame] | 1405 | iov = kmalloc(32 * sizeof(struct kvec), GFP_KERNEL); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1406 | if (iov == NULL) |
Steve French | 9a0c823 | 2007-02-02 04:21:57 +0000 | [diff] [blame] | 1407 | return generic_writepages(mapping, wbc); |
| 1408 | |
| 1409 | |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1410 | /* |
| 1411 | * BB: Is this meaningful for a non-block-device file system? |
| 1412 | * If it is, we should test it again after we do I/O |
| 1413 | */ |
| 1414 | if (wbc->nonblocking && bdi_write_congested(bdi)) { |
| 1415 | wbc->encountered_congestion = 1; |
Steve French | 9a0c823 | 2007-02-02 04:21:57 +0000 | [diff] [blame] | 1416 | kfree(iov); |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1417 | return 0; |
| 1418 | } |
| 1419 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | xid = GetXid(); |
| 1421 | |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1422 | pagevec_init(&pvec, 0); |
OGAWA Hirofumi | 111ebb6 | 2006-06-23 02:03:26 -0700 | [diff] [blame] | 1423 | if (wbc->range_cyclic) { |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1424 | index = mapping->writeback_index; /* Start from prev offset */ |
OGAWA Hirofumi | 111ebb6 | 2006-06-23 02:03:26 -0700 | [diff] [blame] | 1425 | end = -1; |
| 1426 | } else { |
| 1427 | index = wbc->range_start >> PAGE_CACHE_SHIFT; |
| 1428 | end = wbc->range_end >> PAGE_CACHE_SHIFT; |
| 1429 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
| 1430 | range_whole = 1; |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1431 | scanned = 1; |
| 1432 | } |
| 1433 | retry: |
| 1434 | while (!done && (index <= end) && |
| 1435 | (nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, |
| 1436 | PAGECACHE_TAG_DIRTY, |
| 1437 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1))) { |
| 1438 | int first; |
| 1439 | unsigned int i; |
| 1440 | |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1441 | first = -1; |
| 1442 | next = 0; |
| 1443 | n_iov = 0; |
| 1444 | bytes_to_write = 0; |
| 1445 | |
| 1446 | for (i = 0; i < nr_pages; i++) { |
| 1447 | page = pvec.pages[i]; |
| 1448 | /* |
| 1449 | * At this point we hold neither mapping->tree_lock nor |
| 1450 | * lock on the page itself: the page may be truncated or |
| 1451 | * invalidated (changing page->mapping to NULL), or even |
| 1452 | * swizzled back from swapper_space to tmpfs file |
| 1453 | * mapping |
| 1454 | */ |
| 1455 | |
| 1456 | if (first < 0) |
| 1457 | lock_page(page); |
Nick Piggin | 529ae9a | 2008-08-02 12:01:03 +0200 | [diff] [blame] | 1458 | else if (!trylock_page(page)) |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1459 | break; |
| 1460 | |
| 1461 | if (unlikely(page->mapping != mapping)) { |
| 1462 | unlock_page(page); |
| 1463 | break; |
| 1464 | } |
| 1465 | |
OGAWA Hirofumi | 111ebb6 | 2006-06-23 02:03:26 -0700 | [diff] [blame] | 1466 | if (!wbc->range_cyclic && page->index > end) { |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1467 | done = 1; |
| 1468 | unlock_page(page); |
| 1469 | break; |
| 1470 | } |
| 1471 | |
| 1472 | if (next && (page->index != next)) { |
| 1473 | /* Not next consecutive page */ |
| 1474 | unlock_page(page); |
| 1475 | break; |
| 1476 | } |
| 1477 | |
| 1478 | if (wbc->sync_mode != WB_SYNC_NONE) |
| 1479 | wait_on_page_writeback(page); |
| 1480 | |
| 1481 | if (PageWriteback(page) || |
Linus Torvalds | cb876f4 | 2006-12-23 16:19:07 -0800 | [diff] [blame] | 1482 | !clear_page_dirty_for_io(page)) { |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1483 | unlock_page(page); |
| 1484 | break; |
| 1485 | } |
Steve French | 84d2f07 | 2005-10-12 15:32:05 -0700 | [diff] [blame] | 1486 | |
Linus Torvalds | cb876f4 | 2006-12-23 16:19:07 -0800 | [diff] [blame] | 1487 | /* |
| 1488 | * This actually clears the dirty bit in the radix tree. |
| 1489 | * See cifs_writepage() for more commentary. |
| 1490 | */ |
| 1491 | set_page_writeback(page); |
| 1492 | |
Steve French | 84d2f07 | 2005-10-12 15:32:05 -0700 | [diff] [blame] | 1493 | if (page_offset(page) >= mapping->host->i_size) { |
| 1494 | done = 1; |
| 1495 | unlock_page(page); |
Linus Torvalds | cb876f4 | 2006-12-23 16:19:07 -0800 | [diff] [blame] | 1496 | end_page_writeback(page); |
Steve French | 84d2f07 | 2005-10-12 15:32:05 -0700 | [diff] [blame] | 1497 | break; |
| 1498 | } |
| 1499 | |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1500 | /* |
| 1501 | * BB can we get rid of this? pages are held by pvec |
| 1502 | */ |
| 1503 | page_cache_get(page); |
| 1504 | |
Steve French | 84d2f07 | 2005-10-12 15:32:05 -0700 | [diff] [blame] | 1505 | len = min(mapping->host->i_size - page_offset(page), |
| 1506 | (loff_t)PAGE_CACHE_SIZE); |
| 1507 | |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1508 | /* reserve iov[0] for the smb header */ |
| 1509 | n_iov++; |
| 1510 | iov[n_iov].iov_base = kmap(page); |
Steve French | 84d2f07 | 2005-10-12 15:32:05 -0700 | [diff] [blame] | 1511 | iov[n_iov].iov_len = len; |
| 1512 | bytes_to_write += len; |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1513 | |
| 1514 | if (first < 0) { |
| 1515 | first = i; |
| 1516 | offset = page_offset(page); |
| 1517 | } |
| 1518 | next = page->index + 1; |
| 1519 | if (bytes_to_write + PAGE_CACHE_SIZE > cifs_sb->wsize) |
| 1520 | break; |
| 1521 | } |
| 1522 | if (n_iov) { |
Steve French | 23e7dd7 | 2005-10-20 13:44:56 -0700 | [diff] [blame] | 1523 | /* Search for a writable handle every time we call |
| 1524 | * CIFSSMBWrite2. We can't rely on the last handle |
| 1525 | * we used to still be valid |
| 1526 | */ |
| 1527 | open_file = find_writable_file(CIFS_I(mapping->host)); |
| 1528 | if (!open_file) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1529 | cERROR(1, "No writable handles for inode"); |
Steve French | 23e7dd7 | 2005-10-20 13:44:56 -0700 | [diff] [blame] | 1530 | rc = -EBADF; |
Steve French | 1047abc | 2005-10-11 19:58:06 -0700 | [diff] [blame] | 1531 | } else { |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 1532 | long_op = cifs_write_timeout(cifsi, offset); |
Steve French | 23e7dd7 | 2005-10-20 13:44:56 -0700 | [diff] [blame] | 1533 | rc = CIFSSMBWrite2(xid, cifs_sb->tcon, |
| 1534 | open_file->netfid, |
| 1535 | bytes_to_write, offset, |
| 1536 | &bytes_written, iov, n_iov, |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 1537 | long_op); |
Dave Kleikamp | 6ab409b | 2009-08-31 11:07:12 -0400 | [diff] [blame] | 1538 | cifsFileInfo_put(open_file); |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 1539 | cifs_update_eof(cifsi, offset, bytes_written); |
| 1540 | |
Steve French | 23e7dd7 | 2005-10-20 13:44:56 -0700 | [diff] [blame] | 1541 | if (rc || bytes_written < bytes_to_write) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1542 | cERROR(1, "Write2 ret %d, wrote %d", |
| 1543 | rc, bytes_written); |
Steve French | 23e7dd7 | 2005-10-20 13:44:56 -0700 | [diff] [blame] | 1544 | /* BB what if continued retry is |
| 1545 | requested via mount flags? */ |
Jeff Layton | cea2180 | 2007-11-20 23:19:03 +0000 | [diff] [blame] | 1546 | if (rc == -ENOSPC) |
| 1547 | set_bit(AS_ENOSPC, &mapping->flags); |
| 1548 | else |
| 1549 | set_bit(AS_EIO, &mapping->flags); |
Steve French | 23e7dd7 | 2005-10-20 13:44:56 -0700 | [diff] [blame] | 1550 | } else { |
| 1551 | cifs_stats_bytes_written(cifs_sb->tcon, |
| 1552 | bytes_written); |
| 1553 | } |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1554 | } |
| 1555 | for (i = 0; i < n_iov; i++) { |
| 1556 | page = pvec.pages[first + i]; |
Steve French | eb9bdaa | 2006-01-27 15:11:47 -0800 | [diff] [blame] | 1557 | /* Should we also set page error on |
| 1558 | success rc but too little data written? */ |
| 1559 | /* BB investigate retry logic on temporary |
| 1560 | server crash cases and how recovery works |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1561 | when page marked as error */ |
| 1562 | if (rc) |
Steve French | eb9bdaa | 2006-01-27 15:11:47 -0800 | [diff] [blame] | 1563 | SetPageError(page); |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1564 | kunmap(page); |
| 1565 | unlock_page(page); |
Linus Torvalds | cb876f4 | 2006-12-23 16:19:07 -0800 | [diff] [blame] | 1566 | end_page_writeback(page); |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1567 | page_cache_release(page); |
| 1568 | } |
| 1569 | if ((wbc->nr_to_write -= n_iov) <= 0) |
| 1570 | done = 1; |
| 1571 | index = next; |
Dave Kleikamp | b066a48 | 2008-11-18 03:49:05 +0000 | [diff] [blame] | 1572 | } else |
| 1573 | /* Need to re-find the pages we skipped */ |
| 1574 | index = pvec.pages[0]->index + 1; |
| 1575 | |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1576 | pagevec_release(&pvec); |
| 1577 | } |
| 1578 | if (!scanned && !done) { |
| 1579 | /* |
| 1580 | * We hit the last page and there is more work to be done: wrap |
| 1581 | * back to the start of the file |
| 1582 | */ |
| 1583 | scanned = 1; |
| 1584 | index = 0; |
| 1585 | goto retry; |
| 1586 | } |
OGAWA Hirofumi | 111ebb6 | 2006-06-23 02:03:26 -0700 | [diff] [blame] | 1587 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 1588 | mapping->writeback_index = index; |
| 1589 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | FreeXid(xid); |
Steve French | 9a0c823 | 2007-02-02 04:21:57 +0000 | [diff] [blame] | 1591 | kfree(iov); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | return rc; |
| 1593 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1595 | static int cifs_writepage(struct page *page, struct writeback_control *wbc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | { |
| 1597 | int rc = -EFAULT; |
| 1598 | int xid; |
| 1599 | |
| 1600 | xid = GetXid(); |
| 1601 | /* BB add check for wbc flags */ |
| 1602 | page_cache_get(page); |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 1603 | if (!PageUptodate(page)) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1604 | cFYI(1, "ppw - page not up to date"); |
Linus Torvalds | cb876f4 | 2006-12-23 16:19:07 -0800 | [diff] [blame] | 1605 | |
| 1606 | /* |
| 1607 | * Set the "writeback" flag, and clear "dirty" in the radix tree. |
| 1608 | * |
| 1609 | * A writepage() implementation always needs to do either this, |
| 1610 | * or re-dirty the page with "redirty_page_for_writepage()" in |
| 1611 | * the case of a failure. |
| 1612 | * |
| 1613 | * Just unlocking the page will cause the radix tree tag-bits |
| 1614 | * to fail to update with the state of the page correctly. |
| 1615 | */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1616 | set_page_writeback(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1617 | rc = cifs_partialpagewrite(page, 0, PAGE_CACHE_SIZE); |
| 1618 | SetPageUptodate(page); /* BB add check for error and Clearuptodate? */ |
| 1619 | unlock_page(page); |
Linus Torvalds | cb876f4 | 2006-12-23 16:19:07 -0800 | [diff] [blame] | 1620 | end_page_writeback(page); |
| 1621 | page_cache_release(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1622 | FreeXid(xid); |
| 1623 | return rc; |
| 1624 | } |
| 1625 | |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 1626 | static int cifs_write_end(struct file *file, struct address_space *mapping, |
| 1627 | loff_t pos, unsigned len, unsigned copied, |
| 1628 | struct page *page, void *fsdata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1629 | { |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 1630 | int rc; |
| 1631 | struct inode *inode = mapping->host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1633 | cFYI(1, "write_end for page %p from pos %lld with %d bytes", |
| 1634 | page, pos, copied); |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 1635 | |
Jeff Layton | a98ee8c | 2008-11-26 19:32:33 +0000 | [diff] [blame] | 1636 | if (PageChecked(page)) { |
| 1637 | if (copied == len) |
| 1638 | SetPageUptodate(page); |
| 1639 | ClearPageChecked(page); |
| 1640 | } else if (!PageUptodate(page) && copied == PAGE_CACHE_SIZE) |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 1641 | SetPageUptodate(page); |
| 1642 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | if (!PageUptodate(page)) { |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 1644 | char *page_data; |
| 1645 | unsigned offset = pos & (PAGE_CACHE_SIZE - 1); |
| 1646 | int xid; |
| 1647 | |
| 1648 | xid = GetXid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | /* this is probably better than directly calling |
| 1650 | partialpage_write since in this function the file handle is |
| 1651 | known which we might as well leverage */ |
| 1652 | /* BB check if anything else missing out of ppw |
| 1653 | such as updating last write time */ |
| 1654 | page_data = kmap(page); |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 1655 | rc = cifs_write(file, page_data + offset, copied, &pos); |
| 1656 | /* if (rc < 0) should we set writebehind rc? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | kunmap(page); |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 1658 | |
| 1659 | FreeXid(xid); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1660 | } else { |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 1661 | rc = copied; |
| 1662 | pos += copied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1663 | set_page_dirty(page); |
| 1664 | } |
| 1665 | |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 1666 | if (rc > 0) { |
| 1667 | spin_lock(&inode->i_lock); |
| 1668 | if (pos > inode->i_size) |
| 1669 | i_size_write(inode, pos); |
| 1670 | spin_unlock(&inode->i_lock); |
| 1671 | } |
| 1672 | |
| 1673 | unlock_page(page); |
| 1674 | page_cache_release(page); |
| 1675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | return rc; |
| 1677 | } |
| 1678 | |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame] | 1679 | int cifs_fsync(struct file *file, int datasync) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1680 | { |
| 1681 | int xid; |
| 1682 | int rc = 0; |
Steve French | b298f22 | 2009-02-21 21:17:43 +0000 | [diff] [blame] | 1683 | struct cifsTconInfo *tcon; |
| 1684 | struct cifsFileInfo *smbfile = |
| 1685 | (struct cifsFileInfo *)file->private_data; |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 1686 | struct inode *inode = file->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | |
| 1688 | xid = GetXid(); |
| 1689 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1690 | cFYI(1, "Sync file - name: %s datasync: 0x%x", |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame] | 1691 | file->f_path.dentry->d_name.name, datasync); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1692 | |
Jeff Layton | cea2180 | 2007-11-20 23:19:03 +0000 | [diff] [blame] | 1693 | rc = filemap_write_and_wait(inode->i_mapping); |
| 1694 | if (rc == 0) { |
| 1695 | rc = CIFS_I(inode)->write_behind_rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1696 | CIFS_I(inode)->write_behind_rc = 0; |
Steve French | b298f22 | 2009-02-21 21:17:43 +0000 | [diff] [blame] | 1697 | tcon = CIFS_SB(inode->i_sb)->tcon; |
Steve French | be65244 | 2009-02-23 15:21:59 +0000 | [diff] [blame] | 1698 | if (!rc && tcon && smbfile && |
Steve French | 4717bed | 2009-02-24 14:44:19 +0000 | [diff] [blame] | 1699 | !(CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) |
Steve French | b298f22 | 2009-02-21 21:17:43 +0000 | [diff] [blame] | 1700 | rc = CIFSSMBFlush(xid, tcon, smbfile->netfid); |
Jeff Layton | cea2180 | 2007-11-20 23:19:03 +0000 | [diff] [blame] | 1701 | } |
Steve French | b298f22 | 2009-02-21 21:17:43 +0000 | [diff] [blame] | 1702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | FreeXid(xid); |
| 1704 | return rc; |
| 1705 | } |
| 1706 | |
NeilBrown | 3978d71 | 2006-03-26 01:37:17 -0800 | [diff] [blame] | 1707 | /* static void cifs_sync_page(struct page *page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | { |
| 1709 | struct address_space *mapping; |
| 1710 | struct inode *inode; |
| 1711 | unsigned long index = page->index; |
| 1712 | unsigned int rpages = 0; |
| 1713 | int rc = 0; |
| 1714 | |
Steve French | f19159d | 2010-04-21 04:12:10 +0000 | [diff] [blame] | 1715 | cFYI(1, "sync page %p", page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | mapping = page->mapping; |
| 1717 | if (!mapping) |
| 1718 | return 0; |
| 1719 | inode = mapping->host; |
| 1720 | if (!inode) |
NeilBrown | 3978d71 | 2006-03-26 01:37:17 -0800 | [diff] [blame] | 1721 | return; */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1723 | /* fill in rpages then |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | result = cifs_pagein_inode(inode, index, rpages); */ /* BB finish */ |
| 1725 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1726 | /* cFYI(1, "rpages is %d for sync page of Index %ld", rpages, index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1727 | |
NeilBrown | 3978d71 | 2006-03-26 01:37:17 -0800 | [diff] [blame] | 1728 | #if 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | if (rc < 0) |
| 1730 | return rc; |
| 1731 | return 0; |
NeilBrown | 3978d71 | 2006-03-26 01:37:17 -0800 | [diff] [blame] | 1732 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | } */ |
| 1734 | |
| 1735 | /* |
| 1736 | * As file closes, flush all cached write data for this inode checking |
| 1737 | * for write behind errors. |
| 1738 | */ |
Miklos Szeredi | 75e1fcc | 2006-06-23 02:05:12 -0700 | [diff] [blame] | 1739 | int cifs_flush(struct file *file, fl_owner_t id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1741 | struct inode *inode = file->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | int rc = 0; |
| 1743 | |
| 1744 | /* Rather than do the steps manually: |
| 1745 | lock the inode for writing |
| 1746 | loop through pages looking for write behind data (dirty pages) |
| 1747 | coalesce into contiguous 16K (or smaller) chunks to write to server |
| 1748 | send to server (prefer in parallel) |
| 1749 | deal with writebehind errors |
| 1750 | unlock inode for writing |
| 1751 | filemapfdatawrite appears easier for the time being */ |
| 1752 | |
| 1753 | rc = filemap_fdatawrite(inode->i_mapping); |
Jeff Layton | cea2180 | 2007-11-20 23:19:03 +0000 | [diff] [blame] | 1754 | /* reset wb rc if we were able to write out dirty pages */ |
| 1755 | if (!rc) { |
| 1756 | rc = CIFS_I(inode)->write_behind_rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | CIFS_I(inode)->write_behind_rc = 0; |
Jeff Layton | cea2180 | 2007-11-20 23:19:03 +0000 | [diff] [blame] | 1758 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1759 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1760 | cFYI(1, "Flush inode %p file %p rc %d", inode, file, rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1761 | |
| 1762 | return rc; |
| 1763 | } |
| 1764 | |
| 1765 | ssize_t cifs_user_read(struct file *file, char __user *read_data, |
| 1766 | size_t read_size, loff_t *poffset) |
| 1767 | { |
| 1768 | int rc = -EACCES; |
| 1769 | unsigned int bytes_read = 0; |
| 1770 | unsigned int total_read = 0; |
| 1771 | unsigned int current_read_size; |
| 1772 | struct cifs_sb_info *cifs_sb; |
| 1773 | struct cifsTconInfo *pTcon; |
| 1774 | int xid; |
| 1775 | struct cifsFileInfo *open_file; |
| 1776 | char *smb_read_data; |
| 1777 | char __user *current_offset; |
| 1778 | struct smb_com_read_rsp *pSMBr; |
| 1779 | |
| 1780 | xid = GetXid(); |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 1781 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1782 | pTcon = cifs_sb->tcon; |
| 1783 | |
| 1784 | if (file->private_data == NULL) { |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 1785 | rc = -EBADF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1786 | FreeXid(xid); |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 1787 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1788 | } |
| 1789 | open_file = (struct cifsFileInfo *)file->private_data; |
| 1790 | |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 1791 | if ((file->f_flags & O_ACCMODE) == O_WRONLY) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1792 | cFYI(1, "attempting read on write only file instance"); |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 1793 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | for (total_read = 0, current_offset = read_data; |
| 1795 | read_size > total_read; |
| 1796 | total_read += bytes_read, current_offset += bytes_read) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1797 | current_read_size = min_t(const int, read_size - total_read, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | cifs_sb->rsize); |
| 1799 | rc = -EAGAIN; |
| 1800 | smb_read_data = NULL; |
| 1801 | while (rc == -EAGAIN) { |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 1802 | int buf_type = CIFS_NO_BUFFER; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1803 | if ((open_file->invalidHandle) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1804 | (!open_file->closePend)) { |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 1805 | rc = cifs_reopen_file(file, true); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | if (rc != 0) |
| 1807 | break; |
| 1808 | } |
Steve French | bfa0d75 | 2005-08-31 21:50:37 -0700 | [diff] [blame] | 1809 | rc = CIFSSMBRead(xid, pTcon, |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 1810 | open_file->netfid, |
| 1811 | current_read_size, *poffset, |
| 1812 | &bytes_read, &smb_read_data, |
| 1813 | &buf_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | pSMBr = (struct smb_com_read_rsp *)smb_read_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | if (smb_read_data) { |
Steve French | 93544cc | 2006-02-14 22:30:52 -0600 | [diff] [blame] | 1816 | if (copy_to_user(current_offset, |
| 1817 | smb_read_data + |
| 1818 | 4 /* RFC1001 length field */ + |
| 1819 | le16_to_cpu(pSMBr->DataOffset), |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 1820 | bytes_read)) |
Steve French | 93544cc | 2006-02-14 22:30:52 -0600 | [diff] [blame] | 1821 | rc = -EFAULT; |
Steve French | 93544cc | 2006-02-14 22:30:52 -0600 | [diff] [blame] | 1822 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1823 | if (buf_type == CIFS_SMALL_BUFFER) |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 1824 | cifs_small_buf_release(smb_read_data); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1825 | else if (buf_type == CIFS_LARGE_BUFFER) |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 1826 | cifs_buf_release(smb_read_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | smb_read_data = NULL; |
| 1828 | } |
| 1829 | } |
| 1830 | if (rc || (bytes_read == 0)) { |
| 1831 | if (total_read) { |
| 1832 | break; |
| 1833 | } else { |
| 1834 | FreeXid(xid); |
| 1835 | return rc; |
| 1836 | } |
| 1837 | } else { |
Steve French | a454434 | 2005-08-24 13:59:35 -0700 | [diff] [blame] | 1838 | cifs_stats_bytes_read(pTcon, bytes_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | *poffset += bytes_read; |
| 1840 | } |
| 1841 | } |
| 1842 | FreeXid(xid); |
| 1843 | return total_read; |
| 1844 | } |
| 1845 | |
| 1846 | |
| 1847 | static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, |
| 1848 | loff_t *poffset) |
| 1849 | { |
| 1850 | int rc = -EACCES; |
| 1851 | unsigned int bytes_read = 0; |
| 1852 | unsigned int total_read; |
| 1853 | unsigned int current_read_size; |
| 1854 | struct cifs_sb_info *cifs_sb; |
| 1855 | struct cifsTconInfo *pTcon; |
| 1856 | int xid; |
| 1857 | char *current_offset; |
| 1858 | struct cifsFileInfo *open_file; |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 1859 | int buf_type = CIFS_NO_BUFFER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | |
| 1861 | xid = GetXid(); |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 1862 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | pTcon = cifs_sb->tcon; |
| 1864 | |
| 1865 | if (file->private_data == NULL) { |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 1866 | rc = -EBADF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | FreeXid(xid); |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 1868 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | } |
| 1870 | open_file = (struct cifsFileInfo *)file->private_data; |
| 1871 | |
| 1872 | if ((file->f_flags & O_ACCMODE) == O_WRONLY) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1873 | cFYI(1, "attempting read on write only file instance"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1874 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1875 | for (total_read = 0, current_offset = read_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | read_size > total_read; |
| 1877 | total_read += bytes_read, current_offset += bytes_read) { |
| 1878 | current_read_size = min_t(const int, read_size - total_read, |
| 1879 | cifs_sb->rsize); |
Steve French | f9f5c817 | 2005-09-15 23:06:38 -0700 | [diff] [blame] | 1880 | /* For windows me and 9x we do not want to request more |
| 1881 | than it negotiated since it will refuse the read then */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1882 | if ((pTcon->ses) && |
Steve French | f9f5c817 | 2005-09-15 23:06:38 -0700 | [diff] [blame] | 1883 | !(pTcon->ses->capabilities & CAP_LARGE_FILES)) { |
| 1884 | current_read_size = min_t(const int, current_read_size, |
| 1885 | pTcon->ses->server->maxBuf - 128); |
| 1886 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | rc = -EAGAIN; |
| 1888 | while (rc == -EAGAIN) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1889 | if ((open_file->invalidHandle) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | (!open_file->closePend)) { |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 1891 | rc = cifs_reopen_file(file, true); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1892 | if (rc != 0) |
| 1893 | break; |
| 1894 | } |
Steve French | bfa0d75 | 2005-08-31 21:50:37 -0700 | [diff] [blame] | 1895 | rc = CIFSSMBRead(xid, pTcon, |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 1896 | open_file->netfid, |
| 1897 | current_read_size, *poffset, |
| 1898 | &bytes_read, ¤t_offset, |
| 1899 | &buf_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | } |
| 1901 | if (rc || (bytes_read == 0)) { |
| 1902 | if (total_read) { |
| 1903 | break; |
| 1904 | } else { |
| 1905 | FreeXid(xid); |
| 1906 | return rc; |
| 1907 | } |
| 1908 | } else { |
Steve French | a454434 | 2005-08-24 13:59:35 -0700 | [diff] [blame] | 1909 | cifs_stats_bytes_read(pTcon, total_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | *poffset += bytes_read; |
| 1911 | } |
| 1912 | } |
| 1913 | FreeXid(xid); |
| 1914 | return total_read; |
| 1915 | } |
| 1916 | |
| 1917 | int cifs_file_mmap(struct file *file, struct vm_area_struct *vma) |
| 1918 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1919 | int rc, xid; |
| 1920 | |
| 1921 | xid = GetXid(); |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 1922 | rc = cifs_revalidate_file(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1923 | if (rc) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1924 | cFYI(1, "Validation prior to mmap failed, error=%d", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1925 | FreeXid(xid); |
| 1926 | return rc; |
| 1927 | } |
| 1928 | rc = generic_file_mmap(file, vma); |
| 1929 | FreeXid(xid); |
| 1930 | return rc; |
| 1931 | } |
| 1932 | |
| 1933 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1934 | static void cifs_copy_cache_pages(struct address_space *mapping, |
Nick Piggin | 315e995 | 2010-04-21 03:18:28 +0000 | [diff] [blame] | 1935 | struct list_head *pages, int bytes_read, char *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | { |
| 1937 | struct page *page; |
| 1938 | char *target; |
| 1939 | |
| 1940 | while (bytes_read > 0) { |
| 1941 | if (list_empty(pages)) |
| 1942 | break; |
| 1943 | |
| 1944 | page = list_entry(pages->prev, struct page, lru); |
| 1945 | list_del(&page->lru); |
| 1946 | |
Nick Piggin | 315e995 | 2010-04-21 03:18:28 +0000 | [diff] [blame] | 1947 | if (add_to_page_cache_lru(page, mapping, page->index, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | GFP_KERNEL)) { |
| 1949 | page_cache_release(page); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1950 | cFYI(1, "Add page cache failed"); |
Steve French | 3079ca6 | 2005-06-09 14:44:07 -0700 | [diff] [blame] | 1951 | data += PAGE_CACHE_SIZE; |
| 1952 | bytes_read -= PAGE_CACHE_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | continue; |
| 1954 | } |
| 1955 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1956 | target = kmap_atomic(page, KM_USER0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | |
| 1958 | if (PAGE_CACHE_SIZE > bytes_read) { |
| 1959 | memcpy(target, data, bytes_read); |
| 1960 | /* zero the tail end of this partial page */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1961 | memset(target + bytes_read, 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1962 | PAGE_CACHE_SIZE - bytes_read); |
| 1963 | bytes_read = 0; |
| 1964 | } else { |
| 1965 | memcpy(target, data, PAGE_CACHE_SIZE); |
| 1966 | bytes_read -= PAGE_CACHE_SIZE; |
| 1967 | } |
| 1968 | kunmap_atomic(target, KM_USER0); |
| 1969 | |
| 1970 | flush_dcache_page(page); |
| 1971 | SetPageUptodate(page); |
| 1972 | unlock_page(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | data += PAGE_CACHE_SIZE; |
| 1974 | } |
| 1975 | return; |
| 1976 | } |
| 1977 | |
| 1978 | static int cifs_readpages(struct file *file, struct address_space *mapping, |
| 1979 | struct list_head *page_list, unsigned num_pages) |
| 1980 | { |
| 1981 | int rc = -EACCES; |
| 1982 | int xid; |
| 1983 | loff_t offset; |
| 1984 | struct page *page; |
| 1985 | struct cifs_sb_info *cifs_sb; |
| 1986 | struct cifsTconInfo *pTcon; |
Steve French | 2c2130e | 2007-10-12 19:10:28 +0000 | [diff] [blame] | 1987 | unsigned int bytes_read = 0; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1988 | unsigned int read_size, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | char *smb_read_data = NULL; |
| 1990 | struct smb_com_read_rsp *pSMBr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | struct cifsFileInfo *open_file; |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 1992 | int buf_type = CIFS_NO_BUFFER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1993 | |
| 1994 | xid = GetXid(); |
| 1995 | if (file->private_data == NULL) { |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 1996 | rc = -EBADF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | FreeXid(xid); |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 1998 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1999 | } |
| 2000 | open_file = (struct cifsFileInfo *)file->private_data; |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 2001 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | pTcon = cifs_sb->tcon; |
Steve French | bfa0d75 | 2005-08-31 21:50:37 -0700 | [diff] [blame] | 2003 | |
Steve French | f19159d | 2010-04-21 04:12:10 +0000 | [diff] [blame] | 2004 | cFYI(DBG2, "rpages: num pages %d", num_pages); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | for (i = 0; i < num_pages; ) { |
| 2006 | unsigned contig_pages; |
| 2007 | struct page *tmp_page; |
| 2008 | unsigned long expected_index; |
| 2009 | |
| 2010 | if (list_empty(page_list)) |
| 2011 | break; |
| 2012 | |
| 2013 | page = list_entry(page_list->prev, struct page, lru); |
| 2014 | offset = (loff_t)page->index << PAGE_CACHE_SHIFT; |
| 2015 | |
| 2016 | /* count adjacent pages that we will read into */ |
| 2017 | contig_pages = 0; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2018 | expected_index = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2019 | list_entry(page_list->prev, struct page, lru)->index; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2020 | list_for_each_entry_reverse(tmp_page, page_list, lru) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2021 | if (tmp_page->index == expected_index) { |
| 2022 | contig_pages++; |
| 2023 | expected_index++; |
| 2024 | } else |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2025 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2026 | } |
| 2027 | if (contig_pages + i > num_pages) |
| 2028 | contig_pages = num_pages - i; |
| 2029 | |
| 2030 | /* for reads over a certain size could initiate async |
| 2031 | read ahead */ |
| 2032 | |
| 2033 | read_size = contig_pages * PAGE_CACHE_SIZE; |
| 2034 | /* Read size needs to be in multiples of one page */ |
| 2035 | read_size = min_t(const unsigned int, read_size, |
| 2036 | cifs_sb->rsize & PAGE_CACHE_MASK); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2037 | cFYI(DBG2, "rpages: read size 0x%x contiguous pages %d", |
| 2038 | read_size, contig_pages); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2039 | rc = -EAGAIN; |
| 2040 | while (rc == -EAGAIN) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2041 | if ((open_file->invalidHandle) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | (!open_file->closePend)) { |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 2043 | rc = cifs_reopen_file(file, true); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2044 | if (rc != 0) |
| 2045 | break; |
| 2046 | } |
| 2047 | |
Steve French | bfa0d75 | 2005-08-31 21:50:37 -0700 | [diff] [blame] | 2048 | rc = CIFSSMBRead(xid, pTcon, |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 2049 | open_file->netfid, |
| 2050 | read_size, offset, |
| 2051 | &bytes_read, &smb_read_data, |
| 2052 | &buf_type); |
Steve French | a9d02ad | 2005-08-24 23:06:05 -0700 | [diff] [blame] | 2053 | /* BB more RC checks ? */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2054 | if (rc == -EAGAIN) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2055 | if (smb_read_data) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2056 | if (buf_type == CIFS_SMALL_BUFFER) |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 2057 | cifs_small_buf_release(smb_read_data); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2058 | else if (buf_type == CIFS_LARGE_BUFFER) |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 2059 | cifs_buf_release(smb_read_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2060 | smb_read_data = NULL; |
| 2061 | } |
| 2062 | } |
| 2063 | } |
| 2064 | if ((rc < 0) || (smb_read_data == NULL)) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2065 | cFYI(1, "Read error in readpages: %d", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2066 | break; |
| 2067 | } else if (bytes_read > 0) { |
Andrew Morton | 6f88cc2 | 2006-12-10 02:19:44 -0800 | [diff] [blame] | 2068 | task_io_account_read(bytes_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2069 | pSMBr = (struct smb_com_read_rsp *)smb_read_data; |
| 2070 | cifs_copy_cache_pages(mapping, page_list, bytes_read, |
| 2071 | smb_read_data + 4 /* RFC1001 hdr */ + |
Nick Piggin | 315e995 | 2010-04-21 03:18:28 +0000 | [diff] [blame] | 2072 | le16_to_cpu(pSMBr->DataOffset)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | |
| 2074 | i += bytes_read >> PAGE_CACHE_SHIFT; |
Steve French | a454434 | 2005-08-24 13:59:35 -0700 | [diff] [blame] | 2075 | cifs_stats_bytes_read(pTcon, bytes_read); |
Steve French | 2c2130e | 2007-10-12 19:10:28 +0000 | [diff] [blame] | 2076 | if ((bytes_read & PAGE_CACHE_MASK) != bytes_read) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2077 | i++; /* account for partial page */ |
| 2078 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2079 | /* server copy of file can have smaller size |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2080 | than client */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2081 | /* BB do we need to verify this common case ? |
| 2082 | this case is ok - if we are at server EOF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | we will hit it on next read */ |
| 2084 | |
OGAWA Hirofumi | 05ac9d4 | 2006-11-02 22:07:08 -0800 | [diff] [blame] | 2085 | /* break; */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2086 | } |
| 2087 | } else { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2088 | cFYI(1, "No bytes read (%d) at offset %lld . " |
Steve French | f19159d | 2010-04-21 04:12:10 +0000 | [diff] [blame] | 2089 | "Cleaning remaining pages from readahead list", |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2090 | bytes_read, offset); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2091 | /* BB turn off caching and do new lookup on |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2092 | file size at server? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2093 | break; |
| 2094 | } |
| 2095 | if (smb_read_data) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2096 | if (buf_type == CIFS_SMALL_BUFFER) |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 2097 | cifs_small_buf_release(smb_read_data); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2098 | else if (buf_type == CIFS_LARGE_BUFFER) |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 2099 | cifs_buf_release(smb_read_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2100 | smb_read_data = NULL; |
| 2101 | } |
| 2102 | bytes_read = 0; |
| 2103 | } |
| 2104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | /* need to free smb_read_data buf before exit */ |
| 2106 | if (smb_read_data) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2107 | if (buf_type == CIFS_SMALL_BUFFER) |
Steve French | 47c886b | 2006-01-18 14:20:39 -0800 | [diff] [blame] | 2108 | cifs_small_buf_release(smb_read_data); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2109 | else if (buf_type == CIFS_LARGE_BUFFER) |
Steve French | 47c886b | 2006-01-18 14:20:39 -0800 | [diff] [blame] | 2110 | cifs_buf_release(smb_read_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | smb_read_data = NULL; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2112 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | |
| 2114 | FreeXid(xid); |
| 2115 | return rc; |
| 2116 | } |
| 2117 | |
| 2118 | static int cifs_readpage_worker(struct file *file, struct page *page, |
| 2119 | loff_t *poffset) |
| 2120 | { |
| 2121 | char *read_data; |
| 2122 | int rc; |
| 2123 | |
| 2124 | page_cache_get(page); |
| 2125 | read_data = kmap(page); |
| 2126 | /* for reads over a certain size could initiate async read ahead */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | rc = cifs_read(file, read_data, PAGE_CACHE_SIZE, poffset); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | if (rc < 0) |
| 2131 | goto io_error; |
| 2132 | else |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2133 | cFYI(1, "Bytes read %d", rc); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2134 | |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 2135 | file->f_path.dentry->d_inode->i_atime = |
| 2136 | current_fs_time(file->f_path.dentry->d_inode->i_sb); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2138 | if (PAGE_CACHE_SIZE > rc) |
| 2139 | memset(read_data + rc, 0, PAGE_CACHE_SIZE - rc); |
| 2140 | |
| 2141 | flush_dcache_page(page); |
| 2142 | SetPageUptodate(page); |
| 2143 | rc = 0; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2145 | io_error: |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2146 | kunmap(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | page_cache_release(page); |
| 2148 | return rc; |
| 2149 | } |
| 2150 | |
| 2151 | static int cifs_readpage(struct file *file, struct page *page) |
| 2152 | { |
| 2153 | loff_t offset = (loff_t)page->index << PAGE_CACHE_SHIFT; |
| 2154 | int rc = -EACCES; |
| 2155 | int xid; |
| 2156 | |
| 2157 | xid = GetXid(); |
| 2158 | |
| 2159 | if (file->private_data == NULL) { |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 2160 | rc = -EBADF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | FreeXid(xid); |
Suresh Jayaraman | 0f3bc09 | 2009-06-25 18:12:34 +0530 | [diff] [blame] | 2162 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2163 | } |
| 2164 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2165 | cFYI(1, "readpage %p at offset %d 0x%x\n", |
| 2166 | page, (int)offset, (int)offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2167 | |
| 2168 | rc = cifs_readpage_worker(file, page, &offset); |
| 2169 | |
| 2170 | unlock_page(page); |
| 2171 | |
| 2172 | FreeXid(xid); |
| 2173 | return rc; |
| 2174 | } |
| 2175 | |
Steve French | a403a0a | 2007-07-26 15:54:16 +0000 | [diff] [blame] | 2176 | static int is_inode_writable(struct cifsInodeInfo *cifs_inode) |
| 2177 | { |
| 2178 | struct cifsFileInfo *open_file; |
| 2179 | |
| 2180 | read_lock(&GlobalSMBSeslock); |
| 2181 | list_for_each_entry(open_file, &cifs_inode->openFileList, flist) { |
| 2182 | if (open_file->closePend) |
| 2183 | continue; |
| 2184 | if (open_file->pfile && |
| 2185 | ((open_file->pfile->f_flags & O_RDWR) || |
| 2186 | (open_file->pfile->f_flags & O_WRONLY))) { |
| 2187 | read_unlock(&GlobalSMBSeslock); |
| 2188 | return 1; |
| 2189 | } |
| 2190 | } |
| 2191 | read_unlock(&GlobalSMBSeslock); |
| 2192 | return 0; |
| 2193 | } |
| 2194 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2195 | /* We do not want to update the file size from server for inodes |
| 2196 | open for write - to avoid races with writepage extending |
| 2197 | the file - in the future we could consider allowing |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2198 | refreshing the inode only on increases in the file size |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2199 | but this is tricky to do without racing with writebehind |
| 2200 | page caching in the current Linux kernel design */ |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 2201 | bool is_size_safe_to_change(struct cifsInodeInfo *cifsInode, __u64 end_of_file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2202 | { |
Steve French | a403a0a | 2007-07-26 15:54:16 +0000 | [diff] [blame] | 2203 | if (!cifsInode) |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 2204 | return true; |
Steve French | 23e7dd7 | 2005-10-20 13:44:56 -0700 | [diff] [blame] | 2205 | |
Steve French | a403a0a | 2007-07-26 15:54:16 +0000 | [diff] [blame] | 2206 | if (is_inode_writable(cifsInode)) { |
| 2207 | /* This inode is open for write at least once */ |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 2208 | struct cifs_sb_info *cifs_sb; |
| 2209 | |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 2210 | cifs_sb = CIFS_SB(cifsInode->vfs_inode.i_sb); |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 2211 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2212 | /* since no page cache to corrupt on directio |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 2213 | we can change size safely */ |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 2214 | return true; |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 2215 | } |
| 2216 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2217 | if (i_size_read(&cifsInode->vfs_inode) < end_of_file) |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 2218 | return true; |
Steve French | 7ba5263 | 2007-02-08 18:14:13 +0000 | [diff] [blame] | 2219 | |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 2220 | return false; |
Steve French | 23e7dd7 | 2005-10-20 13:44:56 -0700 | [diff] [blame] | 2221 | } else |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 2222 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | } |
| 2224 | |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 2225 | static int cifs_write_begin(struct file *file, struct address_space *mapping, |
| 2226 | loff_t pos, unsigned len, unsigned flags, |
| 2227 | struct page **pagep, void **fsdata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2228 | { |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 2229 | pgoff_t index = pos >> PAGE_CACHE_SHIFT; |
| 2230 | loff_t offset = pos & (PAGE_CACHE_SIZE - 1); |
Jeff Layton | a98ee8c | 2008-11-26 19:32:33 +0000 | [diff] [blame] | 2231 | loff_t page_start = pos & PAGE_MASK; |
| 2232 | loff_t i_size; |
| 2233 | struct page *page; |
| 2234 | int rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2235 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2236 | cFYI(1, "write_begin from %lld len %d", (long long)pos, len); |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 2237 | |
Nick Piggin | 54566b2 | 2009-01-04 12:00:53 -0800 | [diff] [blame] | 2238 | page = grab_cache_page_write_begin(mapping, index, flags); |
Jeff Layton | a98ee8c | 2008-11-26 19:32:33 +0000 | [diff] [blame] | 2239 | if (!page) { |
| 2240 | rc = -ENOMEM; |
| 2241 | goto out; |
| 2242 | } |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 2243 | |
Jeff Layton | a98ee8c | 2008-11-26 19:32:33 +0000 | [diff] [blame] | 2244 | if (PageUptodate(page)) |
| 2245 | goto out; |
Steve French | 8a23626 | 2007-03-06 00:31:00 +0000 | [diff] [blame] | 2246 | |
Jeff Layton | a98ee8c | 2008-11-26 19:32:33 +0000 | [diff] [blame] | 2247 | /* |
| 2248 | * If we write a full page it will be up to date, no need to read from |
| 2249 | * the server. If the write is short, we'll end up doing a sync write |
| 2250 | * instead. |
| 2251 | */ |
| 2252 | if (len == PAGE_CACHE_SIZE) |
| 2253 | goto out; |
| 2254 | |
| 2255 | /* |
| 2256 | * optimize away the read when we have an oplock, and we're not |
| 2257 | * expecting to use any of the data we'd be reading in. That |
| 2258 | * is, when the page lies beyond the EOF, or straddles the EOF |
| 2259 | * and the write will cover all of the existing data. |
| 2260 | */ |
| 2261 | if (CIFS_I(mapping->host)->clientCanCacheRead) { |
| 2262 | i_size = i_size_read(mapping->host); |
| 2263 | if (page_start >= i_size || |
| 2264 | (offset == 0 && (pos + len) >= i_size)) { |
| 2265 | zero_user_segments(page, 0, offset, |
| 2266 | offset + len, |
| 2267 | PAGE_CACHE_SIZE); |
| 2268 | /* |
| 2269 | * PageChecked means that the parts of the page |
| 2270 | * to which we're not writing are considered up |
| 2271 | * to date. Once the data is copied to the |
| 2272 | * page, it can be set uptodate. |
| 2273 | */ |
| 2274 | SetPageChecked(page); |
| 2275 | goto out; |
| 2276 | } |
| 2277 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 2279 | if ((file->f_flags & O_ACCMODE) != O_WRONLY) { |
Jeff Layton | a98ee8c | 2008-11-26 19:32:33 +0000 | [diff] [blame] | 2280 | /* |
| 2281 | * might as well read a page, it is fast enough. If we get |
| 2282 | * an error, we don't need to return it. cifs_write_end will |
| 2283 | * do a sync write instead since PG_uptodate isn't set. |
| 2284 | */ |
| 2285 | cifs_readpage_worker(file, page, &page_start); |
Steve French | 8a23626 | 2007-03-06 00:31:00 +0000 | [diff] [blame] | 2286 | } else { |
| 2287 | /* we could try using another file handle if there is one - |
| 2288 | but how would we lock it to prevent close of that handle |
| 2289 | racing with this read? In any case |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 2290 | this will be written out by write_end so is fine */ |
Steve French | 8a23626 | 2007-03-06 00:31:00 +0000 | [diff] [blame] | 2291 | } |
Jeff Layton | a98ee8c | 2008-11-26 19:32:33 +0000 | [diff] [blame] | 2292 | out: |
| 2293 | *pagep = page; |
| 2294 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2295 | } |
| 2296 | |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame] | 2297 | static void |
| 2298 | cifs_oplock_break(struct slow_work *work) |
| 2299 | { |
| 2300 | struct cifsFileInfo *cfile = container_of(work, struct cifsFileInfo, |
| 2301 | oplock_break); |
| 2302 | struct inode *inode = cfile->pInode; |
| 2303 | struct cifsInodeInfo *cinode = CIFS_I(inode); |
| 2304 | struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->mnt->mnt_sb); |
| 2305 | int rc, waitrc = 0; |
| 2306 | |
| 2307 | if (inode && S_ISREG(inode->i_mode)) { |
Steve French | d54ff73 | 2010-04-27 04:38:15 +0000 | [diff] [blame] | 2308 | if (cinode->clientCanCacheRead) |
Al Viro | 8737c93 | 2009-12-24 06:47:55 -0500 | [diff] [blame] | 2309 | break_lease(inode, O_RDONLY); |
Steve French | d54ff73 | 2010-04-27 04:38:15 +0000 | [diff] [blame] | 2310 | else |
Al Viro | 8737c93 | 2009-12-24 06:47:55 -0500 | [diff] [blame] | 2311 | break_lease(inode, O_WRONLY); |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame] | 2312 | rc = filemap_fdatawrite(inode->i_mapping); |
| 2313 | if (cinode->clientCanCacheRead == 0) { |
| 2314 | waitrc = filemap_fdatawait(inode->i_mapping); |
| 2315 | invalidate_remote_inode(inode); |
| 2316 | } |
| 2317 | if (!rc) |
| 2318 | rc = waitrc; |
| 2319 | if (rc) |
| 2320 | cinode->write_behind_rc = rc; |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2321 | cFYI(1, "Oplock flush inode %p rc %d", inode, rc); |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame] | 2322 | } |
| 2323 | |
| 2324 | /* |
| 2325 | * releasing stale oplock after recent reconnect of smb session using |
| 2326 | * a now incorrect file handle is not a data integrity issue but do |
| 2327 | * not bother sending an oplock release if session to server still is |
| 2328 | * disconnected since oplock already released by the server |
| 2329 | */ |
| 2330 | if (!cfile->closePend && !cfile->oplock_break_cancelled) { |
| 2331 | rc = CIFSSMBLock(0, cifs_sb->tcon, cfile->netfid, 0, 0, 0, 0, |
| 2332 | LOCKING_ANDX_OPLOCK_RELEASE, false); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2333 | cFYI(1, "Oplock release rc = %d", rc); |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame] | 2334 | } |
| 2335 | } |
| 2336 | |
| 2337 | static int |
| 2338 | cifs_oplock_break_get(struct slow_work *work) |
| 2339 | { |
| 2340 | struct cifsFileInfo *cfile = container_of(work, struct cifsFileInfo, |
| 2341 | oplock_break); |
| 2342 | mntget(cfile->mnt); |
| 2343 | cifsFileInfo_get(cfile); |
| 2344 | return 0; |
| 2345 | } |
| 2346 | |
| 2347 | static void |
| 2348 | cifs_oplock_break_put(struct slow_work *work) |
| 2349 | { |
| 2350 | struct cifsFileInfo *cfile = container_of(work, struct cifsFileInfo, |
| 2351 | oplock_break); |
| 2352 | mntput(cfile->mnt); |
| 2353 | cifsFileInfo_put(cfile); |
| 2354 | } |
| 2355 | |
| 2356 | const struct slow_work_ops cifs_oplock_break_ops = { |
| 2357 | .get_ref = cifs_oplock_break_get, |
| 2358 | .put_ref = cifs_oplock_break_put, |
| 2359 | .execute = cifs_oplock_break, |
| 2360 | }; |
| 2361 | |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 2362 | const struct address_space_operations cifs_addr_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2363 | .readpage = cifs_readpage, |
| 2364 | .readpages = cifs_readpages, |
| 2365 | .writepage = cifs_writepage, |
Steve French | 37c0eb4 | 2005-10-05 14:50:29 -0700 | [diff] [blame] | 2366 | .writepages = cifs_writepages, |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 2367 | .write_begin = cifs_write_begin, |
| 2368 | .write_end = cifs_write_end, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2369 | .set_page_dirty = __set_page_dirty_nobuffers, |
| 2370 | /* .sync_page = cifs_sync_page, */ |
| 2371 | /* .direct_IO = */ |
| 2372 | }; |
Dave Kleikamp | 273d81d | 2006-06-01 19:41:23 +0000 | [diff] [blame] | 2373 | |
| 2374 | /* |
| 2375 | * cifs_readpages requires the server to support a buffer large enough to |
| 2376 | * contain the header plus one complete page of data. Otherwise, we need |
| 2377 | * to leave cifs_readpages out of the address space operations. |
| 2378 | */ |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 2379 | const struct address_space_operations cifs_addr_ops_smallbuf = { |
Dave Kleikamp | 273d81d | 2006-06-01 19:41:23 +0000 | [diff] [blame] | 2380 | .readpage = cifs_readpage, |
| 2381 | .writepage = cifs_writepage, |
| 2382 | .writepages = cifs_writepages, |
Nick Piggin | d941477 | 2008-09-24 11:32:59 -0400 | [diff] [blame] | 2383 | .write_begin = cifs_write_begin, |
| 2384 | .write_end = cifs_write_end, |
Dave Kleikamp | 273d81d | 2006-06-01 19:41:23 +0000 | [diff] [blame] | 2385 | .set_page_dirty = __set_page_dirty_nobuffers, |
| 2386 | /* .sync_page = cifs_sync_page, */ |
| 2387 | /* .direct_IO = */ |
| 2388 | }; |