Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1 | /* -*- mode: c; c-basic-offset: 8; -*- |
| 2 | * vim: noexpandtab sw=8 ts=8 sts=0: |
| 3 | * |
| 4 | * file.c |
| 5 | * |
| 6 | * File open, close, extend, truncate |
| 7 | * |
| 8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program 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 the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public |
| 21 | * License along with this program; if not, write to the |
| 22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | * Boston, MA 021110-1307, USA. |
| 24 | */ |
| 25 | |
Randy Dunlap | 16f7e0f | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 26 | #include <linux/capability.h> |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 27 | #include <linux/fs.h> |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/highmem.h> |
| 31 | #include <linux/pagemap.h> |
| 32 | #include <linux/uio.h> |
Mark Fasheh | e2057c5 | 2006-10-03 17:53:05 -0700 | [diff] [blame] | 33 | #include <linux/sched.h> |
Jens Axboe | d6b29d7 | 2007-06-04 09:59:47 +0200 | [diff] [blame] | 34 | #include <linux/splice.h> |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 35 | #include <linux/mount.h> |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 36 | #include <linux/writeback.h> |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 37 | #include <linux/falloc.h> |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 38 | #include <linux/quotaops.h> |
Jan Kara | 04eda1a | 2010-08-05 20:32:45 +0200 | [diff] [blame] | 39 | #include <linux/blkdev.h> |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 40 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 41 | #include <cluster/masklog.h> |
| 42 | |
| 43 | #include "ocfs2.h" |
| 44 | |
| 45 | #include "alloc.h" |
| 46 | #include "aops.h" |
| 47 | #include "dir.h" |
| 48 | #include "dlmglue.h" |
| 49 | #include "extent_map.h" |
| 50 | #include "file.h" |
| 51 | #include "sysfile.h" |
| 52 | #include "inode.h" |
Herbert Poetzl | ca4d147 | 2006-07-03 17:27:12 -0700 | [diff] [blame] | 53 | #include "ioctl.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 54 | #include "journal.h" |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 55 | #include "locks.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 56 | #include "mmap.h" |
| 57 | #include "suballoc.h" |
| 58 | #include "super.h" |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 59 | #include "xattr.h" |
Tiger Yang | 23fc270 | 2008-11-14 11:17:18 +0800 | [diff] [blame] | 60 | #include "acl.h" |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 61 | #include "quota.h" |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 62 | #include "refcounttree.h" |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 63 | #include "ocfs2_trace.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 64 | |
| 65 | #include "buffer_head_io.h" |
| 66 | |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 67 | static int ocfs2_init_file_private(struct inode *inode, struct file *file) |
| 68 | { |
| 69 | struct ocfs2_file_private *fp; |
| 70 | |
| 71 | fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL); |
| 72 | if (!fp) |
| 73 | return -ENOMEM; |
| 74 | |
| 75 | fp->fp_file = file; |
| 76 | mutex_init(&fp->fp_mutex); |
| 77 | ocfs2_file_lock_res_init(&fp->fp_flock, fp); |
| 78 | file->private_data = fp; |
| 79 | |
| 80 | return 0; |
| 81 | } |
| 82 | |
| 83 | static void ocfs2_free_file_private(struct inode *inode, struct file *file) |
| 84 | { |
| 85 | struct ocfs2_file_private *fp = file->private_data; |
| 86 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 87 | |
| 88 | if (fp) { |
| 89 | ocfs2_simple_drop_lockres(osb, &fp->fp_flock); |
| 90 | ocfs2_lock_res_free(&fp->fp_flock); |
| 91 | kfree(fp); |
| 92 | file->private_data = NULL; |
| 93 | } |
| 94 | } |
| 95 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 96 | static int ocfs2_file_open(struct inode *inode, struct file *file) |
| 97 | { |
| 98 | int status; |
| 99 | int mode = file->f_flags; |
| 100 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 101 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 102 | trace_ocfs2_file_open(inode, file, file->f_path.dentry, |
| 103 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 104 | file->f_path.dentry->d_name.len, |
| 105 | file->f_path.dentry->d_name.name, mode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 106 | |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 107 | if (file->f_mode & FMODE_WRITE) |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 108 | dquot_initialize(inode); |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 109 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 110 | spin_lock(&oi->ip_lock); |
| 111 | |
| 112 | /* Check that the inode hasn't been wiped from disk by another |
| 113 | * node. If it hasn't then we're safe as long as we hold the |
| 114 | * spin lock until our increment of open count. */ |
| 115 | if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { |
| 116 | spin_unlock(&oi->ip_lock); |
| 117 | |
| 118 | status = -ENOENT; |
| 119 | goto leave; |
| 120 | } |
| 121 | |
| 122 | if (mode & O_DIRECT) |
| 123 | oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT; |
| 124 | |
| 125 | oi->ip_open_count++; |
| 126 | spin_unlock(&oi->ip_lock); |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 127 | |
| 128 | status = ocfs2_init_file_private(inode, file); |
| 129 | if (status) { |
| 130 | /* |
| 131 | * We want to set open count back if we're failing the |
| 132 | * open. |
| 133 | */ |
| 134 | spin_lock(&oi->ip_lock); |
| 135 | oi->ip_open_count--; |
| 136 | spin_unlock(&oi->ip_lock); |
| 137 | } |
| 138 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 139 | leave: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 140 | return status; |
| 141 | } |
| 142 | |
| 143 | static int ocfs2_file_release(struct inode *inode, struct file *file) |
| 144 | { |
| 145 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 146 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 147 | spin_lock(&oi->ip_lock); |
| 148 | if (!--oi->ip_open_count) |
| 149 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 150 | |
| 151 | trace_ocfs2_file_release(inode, file, file->f_path.dentry, |
| 152 | oi->ip_blkno, |
| 153 | file->f_path.dentry->d_name.len, |
| 154 | file->f_path.dentry->d_name.name, |
| 155 | oi->ip_open_count); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 156 | spin_unlock(&oi->ip_lock); |
| 157 | |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 158 | ocfs2_free_file_private(inode, file); |
| 159 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 160 | return 0; |
| 161 | } |
| 162 | |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 163 | static int ocfs2_dir_open(struct inode *inode, struct file *file) |
| 164 | { |
| 165 | return ocfs2_init_file_private(inode, file); |
| 166 | } |
| 167 | |
| 168 | static int ocfs2_dir_release(struct inode *inode, struct file *file) |
| 169 | { |
| 170 | ocfs2_free_file_private(inode, file); |
| 171 | return 0; |
| 172 | } |
| 173 | |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame] | 174 | static int ocfs2_sync_file(struct file *file, int datasync) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 175 | { |
| 176 | int err = 0; |
| 177 | journal_t *journal; |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame] | 178 | struct inode *inode = file->f_mapping->host; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 179 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 180 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 181 | trace_ocfs2_sync_file(inode, file, file->f_path.dentry, |
| 182 | OCFS2_I(inode)->ip_blkno, |
| 183 | file->f_path.dentry->d_name.len, |
| 184 | file->f_path.dentry->d_name.name, |
| 185 | (unsigned long long)datasync); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 186 | |
Jan Kara | 04eda1a | 2010-08-05 20:32:45 +0200 | [diff] [blame] | 187 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) { |
| 188 | /* |
| 189 | * We still have to flush drive's caches to get data to the |
| 190 | * platter |
| 191 | */ |
| 192 | if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER) |
Linus Torvalds | f8cae0f | 2010-10-22 19:30:38 -0700 | [diff] [blame] | 193 | blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); |
Hisashi Hifumi | e04cc15 | 2009-06-09 16:47:45 +0900 | [diff] [blame] | 194 | goto bail; |
Jan Kara | 04eda1a | 2010-08-05 20:32:45 +0200 | [diff] [blame] | 195 | } |
Hisashi Hifumi | e04cc15 | 2009-06-09 16:47:45 +0900 | [diff] [blame] | 196 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 197 | journal = osb->journal->j_journal; |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 198 | err = jbd2_journal_force_commit(journal); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 199 | |
| 200 | bail: |
Tao Ma | c1e8d35 | 2011-03-07 16:43:21 +0800 | [diff] [blame] | 201 | if (err) |
| 202 | mlog_errno(err); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 203 | |
| 204 | return (err < 0) ? -EIO : 0; |
| 205 | } |
| 206 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 207 | int ocfs2_should_update_atime(struct inode *inode, |
| 208 | struct vfsmount *vfsmnt) |
| 209 | { |
| 210 | struct timespec now; |
| 211 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 212 | |
| 213 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
| 214 | return 0; |
| 215 | |
| 216 | if ((inode->i_flags & S_NOATIME) || |
| 217 | ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))) |
| 218 | return 0; |
| 219 | |
Mark Fasheh | 6c2aad0 | 2006-12-19 15:25:52 -0800 | [diff] [blame] | 220 | /* |
| 221 | * We can be called with no vfsmnt structure - NFSD will |
| 222 | * sometimes do this. |
| 223 | * |
| 224 | * Note that our action here is different than touch_atime() - |
| 225 | * if we can't tell whether this is a noatime mount, then we |
| 226 | * don't know whether to trust the value of s_atime_quantum. |
| 227 | */ |
| 228 | if (vfsmnt == NULL) |
| 229 | return 0; |
| 230 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 231 | if ((vfsmnt->mnt_flags & MNT_NOATIME) || |
| 232 | ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
| 233 | return 0; |
| 234 | |
Mark Fasheh | 7e913c5 | 2006-12-13 00:34:35 -0800 | [diff] [blame] | 235 | if (vfsmnt->mnt_flags & MNT_RELATIME) { |
| 236 | if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) || |
| 237 | (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0)) |
| 238 | return 1; |
| 239 | |
| 240 | return 0; |
| 241 | } |
| 242 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 243 | now = CURRENT_TIME; |
| 244 | if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum)) |
| 245 | return 0; |
| 246 | else |
| 247 | return 1; |
| 248 | } |
| 249 | |
| 250 | int ocfs2_update_inode_atime(struct inode *inode, |
| 251 | struct buffer_head *bh) |
| 252 | { |
| 253 | int ret; |
| 254 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 255 | handle_t *handle; |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 256 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data; |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 257 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 258 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 259 | if (IS_ERR(handle)) { |
| 260 | ret = PTR_ERR(handle); |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 261 | mlog_errno(ret); |
| 262 | goto out; |
| 263 | } |
| 264 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 265 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 266 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 267 | if (ret) { |
| 268 | mlog_errno(ret); |
| 269 | goto out_commit; |
| 270 | } |
| 271 | |
| 272 | /* |
| 273 | * Don't use ocfs2_mark_inode_dirty() here as we don't always |
| 274 | * have i_mutex to guard against concurrent changes to other |
| 275 | * inode fields. |
| 276 | */ |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 277 | inode->i_atime = CURRENT_TIME; |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 278 | di->i_atime = cpu_to_le64(inode->i_atime.tv_sec); |
| 279 | di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 280 | ocfs2_journal_dirty(handle, bh); |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 281 | |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 282 | out_commit: |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 283 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
| 284 | out: |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 285 | return ret; |
| 286 | } |
| 287 | |
Adrian Bunk | 6cb129f | 2007-04-26 00:29:35 -0700 | [diff] [blame] | 288 | static int ocfs2_set_inode_size(handle_t *handle, |
| 289 | struct inode *inode, |
| 290 | struct buffer_head *fe_bh, |
| 291 | u64 new_i_size) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 292 | { |
| 293 | int status; |
| 294 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 295 | i_size_write(inode, new_i_size); |
Mark Fasheh | 8110b07 | 2007-03-22 16:53:23 -0700 | [diff] [blame] | 296 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 297 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 298 | |
| 299 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); |
| 300 | if (status < 0) { |
| 301 | mlog_errno(status); |
| 302 | goto bail; |
| 303 | } |
| 304 | |
| 305 | bail: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 306 | return status; |
| 307 | } |
| 308 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 309 | int ocfs2_simple_size_update(struct inode *inode, |
| 310 | struct buffer_head *di_bh, |
| 311 | u64 new_i_size) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 312 | { |
| 313 | int ret; |
| 314 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 315 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 316 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 317 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 318 | if (IS_ERR(handle)) { |
| 319 | ret = PTR_ERR(handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 320 | mlog_errno(ret); |
| 321 | goto out; |
| 322 | } |
| 323 | |
| 324 | ret = ocfs2_set_inode_size(handle, inode, di_bh, |
| 325 | new_i_size); |
| 326 | if (ret < 0) |
| 327 | mlog_errno(ret); |
| 328 | |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 329 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 330 | out: |
| 331 | return ret; |
| 332 | } |
| 333 | |
Tao Ma | 37f8a2b | 2009-08-26 09:47:28 +0800 | [diff] [blame] | 334 | static int ocfs2_cow_file_pos(struct inode *inode, |
| 335 | struct buffer_head *fe_bh, |
| 336 | u64 offset) |
| 337 | { |
| 338 | int status; |
| 339 | u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 340 | unsigned int num_clusters = 0; |
| 341 | unsigned int ext_flags = 0; |
| 342 | |
| 343 | /* |
| 344 | * If the new offset is aligned to the range of the cluster, there is |
| 345 | * no space for ocfs2_zero_range_for_truncate to fill, so no need to |
| 346 | * CoW either. |
| 347 | */ |
| 348 | if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0) |
| 349 | return 0; |
| 350 | |
| 351 | status = ocfs2_get_clusters(inode, cpos, &phys, |
| 352 | &num_clusters, &ext_flags); |
| 353 | if (status) { |
| 354 | mlog_errno(status); |
| 355 | goto out; |
| 356 | } |
| 357 | |
| 358 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) |
| 359 | goto out; |
| 360 | |
Tao Ma | 1550271 | 2010-08-12 10:36:38 +0800 | [diff] [blame] | 361 | return ocfs2_refcount_cow(inode, NULL, fe_bh, cpos, 1, cpos+1); |
Tao Ma | 37f8a2b | 2009-08-26 09:47:28 +0800 | [diff] [blame] | 362 | |
| 363 | out: |
| 364 | return status; |
| 365 | } |
| 366 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 367 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, |
| 368 | struct inode *inode, |
| 369 | struct buffer_head *fe_bh, |
| 370 | u64 new_i_size) |
| 371 | { |
| 372 | int status; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 373 | handle_t *handle; |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 374 | struct ocfs2_dinode *di; |
Mark Fasheh | 35edec1 | 2007-07-06 14:41:18 -0700 | [diff] [blame] | 375 | u64 cluster_bytes; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 376 | |
Tao Ma | 37f8a2b | 2009-08-26 09:47:28 +0800 | [diff] [blame] | 377 | /* |
| 378 | * We need to CoW the cluster contains the offset if it is reflinked |
| 379 | * since we will call ocfs2_zero_range_for_truncate later which will |
| 380 | * write "0" from offset to the end of the cluster. |
| 381 | */ |
| 382 | status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size); |
| 383 | if (status) { |
| 384 | mlog_errno(status); |
| 385 | return status; |
| 386 | } |
| 387 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 388 | /* TODO: This needs to actually orphan the inode in this |
| 389 | * transaction. */ |
| 390 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 391 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 392 | if (IS_ERR(handle)) { |
| 393 | status = PTR_ERR(handle); |
| 394 | mlog_errno(status); |
| 395 | goto out; |
| 396 | } |
| 397 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 398 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 399 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 400 | if (status < 0) { |
| 401 | mlog_errno(status); |
| 402 | goto out_commit; |
| 403 | } |
| 404 | |
| 405 | /* |
| 406 | * Do this before setting i_size. |
| 407 | */ |
Mark Fasheh | 35edec1 | 2007-07-06 14:41:18 -0700 | [diff] [blame] | 408 | cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size); |
| 409 | status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size, |
| 410 | cluster_bytes); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 411 | if (status) { |
| 412 | mlog_errno(status); |
| 413 | goto out_commit; |
| 414 | } |
| 415 | |
| 416 | i_size_write(inode, new_i_size); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 417 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 418 | |
| 419 | di = (struct ocfs2_dinode *) fe_bh->b_data; |
| 420 | di->i_size = cpu_to_le64(new_i_size); |
| 421 | di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec); |
| 422 | di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
| 423 | |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 424 | ocfs2_journal_dirty(handle, fe_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 425 | |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 426 | out_commit: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 427 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 428 | out: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 429 | return status; |
| 430 | } |
| 431 | |
| 432 | static int ocfs2_truncate_file(struct inode *inode, |
| 433 | struct buffer_head *di_bh, |
| 434 | u64 new_i_size) |
| 435 | { |
| 436 | int status = 0; |
| 437 | struct ocfs2_dinode *fe = NULL; |
| 438 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 439 | |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 440 | /* We trust di_bh because it comes from ocfs2_inode_lock(), which |
| 441 | * already validated it */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 442 | fe = (struct ocfs2_dinode *) di_bh->b_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 443 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 444 | trace_ocfs2_truncate_file((unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 445 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 446 | (unsigned long long)new_i_size); |
| 447 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 448 | mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 449 | "Inode %llu, inode i_size = %lld != di " |
| 450 | "i_size = %llu, i_flags = 0x%x\n", |
| 451 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 452 | i_size_read(inode), |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 453 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 454 | le32_to_cpu(fe->i_flags)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 455 | |
| 456 | if (new_i_size > le64_to_cpu(fe->i_size)) { |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 457 | trace_ocfs2_truncate_file_error( |
| 458 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 459 | (unsigned long long)new_i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 460 | status = -EINVAL; |
| 461 | mlog_errno(status); |
| 462 | goto bail; |
| 463 | } |
| 464 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 465 | /* lets handle the simple truncate cases before doing any more |
| 466 | * cluster locking. */ |
| 467 | if (new_i_size == le64_to_cpu(fe->i_size)) |
| 468 | goto bail; |
| 469 | |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 470 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 471 | |
Mark Fasheh | 4fe370a | 2009-12-07 13:15:40 -0800 | [diff] [blame] | 472 | ocfs2_resv_discard(&osb->osb_la_resmap, |
| 473 | &OCFS2_I(inode)->ip_la_data_resv); |
| 474 | |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 475 | /* |
| 476 | * The inode lock forced other nodes to sync and drop their |
| 477 | * pages, which (correctly) happens even if we have a truncate |
| 478 | * without allocation change - ocfs2 cluster sizes can be much |
| 479 | * greater than page size, so we have to truncate them |
| 480 | * anyway. |
| 481 | */ |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 482 | unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); |
| 483 | truncate_inode_pages(inode->i_mapping, new_i_size); |
| 484 | |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 485 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 486 | status = ocfs2_truncate_inline(inode, di_bh, new_i_size, |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 487 | i_size_read(inode), 1); |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 488 | if (status) |
| 489 | mlog_errno(status); |
| 490 | |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 491 | goto bail_unlock_sem; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 492 | } |
| 493 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 494 | /* alright, we're going to need to do a full blown alloc size |
| 495 | * change. Orphan the inode so that recovery can complete the |
| 496 | * truncate if necessary. This does the task of marking |
| 497 | * i_size. */ |
| 498 | status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); |
| 499 | if (status < 0) { |
| 500 | mlog_errno(status); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 501 | goto bail_unlock_sem; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 502 | } |
| 503 | |
Tristan Ye | 78f9467 | 2010-05-11 17:54:42 +0800 | [diff] [blame] | 504 | status = ocfs2_commit_truncate(osb, inode, di_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 505 | if (status < 0) { |
| 506 | mlog_errno(status); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 507 | goto bail_unlock_sem; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 508 | } |
| 509 | |
| 510 | /* TODO: orphan dir cleanup here. */ |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 511 | bail_unlock_sem: |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 512 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 513 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 514 | bail: |
Tao Ma | 8b2c0db | 2009-08-18 11:43:49 +0800 | [diff] [blame] | 515 | if (!status && OCFS2_I(inode)->ip_clusters == 0) |
| 516 | status = ocfs2_try_remove_refcount_tree(inode, di_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 517 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 518 | return status; |
| 519 | } |
| 520 | |
| 521 | /* |
Tao Ma | 0eb8d47 | 2008-08-18 17:38:45 +0800 | [diff] [blame] | 522 | * extend file allocation only here. |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 523 | * we'll update all the disk stuff, and oip->alloc_size |
| 524 | * |
| 525 | * expect stuff to be locked, a transaction started and enough data / |
| 526 | * metadata reservations in the contexts. |
| 527 | * |
| 528 | * Will return -EAGAIN, and a reason if a restart is needed. |
| 529 | * If passed in, *reason will always be set, even in error. |
| 530 | */ |
Tao Ma | 0eb8d47 | 2008-08-18 17:38:45 +0800 | [diff] [blame] | 531 | int ocfs2_add_inode_data(struct ocfs2_super *osb, |
| 532 | struct inode *inode, |
| 533 | u32 *logical_offset, |
| 534 | u32 clusters_to_add, |
| 535 | int mark_unwritten, |
| 536 | struct buffer_head *fe_bh, |
| 537 | handle_t *handle, |
| 538 | struct ocfs2_alloc_context *data_ac, |
| 539 | struct ocfs2_alloc_context *meta_ac, |
| 540 | enum ocfs2_alloc_restarted *reason_ret) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 541 | { |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 542 | int ret; |
| 543 | struct ocfs2_extent_tree et; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 544 | |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 545 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh); |
Joel Becker | cbee7e1 | 2009-02-13 03:34:15 -0800 | [diff] [blame] | 546 | ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset, |
| 547 | clusters_to_add, mark_unwritten, |
| 548 | data_ac, meta_ac, reason_ret); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 549 | |
| 550 | return ret; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 551 | } |
| 552 | |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 553 | static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start, |
| 554 | u32 clusters_to_add, int mark_unwritten) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 555 | { |
| 556 | int status = 0; |
| 557 | int restart_func = 0; |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 558 | int credits; |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 559 | u32 prev_clusters; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 560 | struct buffer_head *bh = NULL; |
| 561 | struct ocfs2_dinode *fe = NULL; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 562 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 563 | struct ocfs2_alloc_context *data_ac = NULL; |
| 564 | struct ocfs2_alloc_context *meta_ac = NULL; |
| 565 | enum ocfs2_alloc_restarted why; |
| 566 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 567 | struct ocfs2_extent_tree et; |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 568 | int did_quota = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 569 | |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 570 | /* |
| 571 | * This function only exists for file systems which don't |
| 572 | * support holes. |
| 573 | */ |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 574 | BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb)); |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 575 | |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 576 | status = ocfs2_read_inode_block(inode, &bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 577 | if (status < 0) { |
| 578 | mlog_errno(status); |
| 579 | goto leave; |
| 580 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 581 | fe = (struct ocfs2_dinode *) bh->b_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 582 | |
| 583 | restart_all: |
| 584 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); |
| 585 | |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 586 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 587 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
| 588 | &data_ac, &meta_ac); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 589 | if (status) { |
| 590 | mlog_errno(status); |
| 591 | goto leave; |
| 592 | } |
| 593 | |
Tao Ma | 811f933 | 2008-08-18 17:38:43 +0800 | [diff] [blame] | 594 | credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list, |
| 595 | clusters_to_add); |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 596 | handle = ocfs2_start_trans(osb, credits); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 597 | if (IS_ERR(handle)) { |
| 598 | status = PTR_ERR(handle); |
| 599 | handle = NULL; |
| 600 | mlog_errno(status); |
| 601 | goto leave; |
| 602 | } |
| 603 | |
| 604 | restarted_transaction: |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 605 | trace_ocfs2_extend_allocation( |
| 606 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 607 | (unsigned long long)i_size_read(inode), |
| 608 | le32_to_cpu(fe->i_clusters), clusters_to_add, |
| 609 | why, restart_func); |
| 610 | |
Christoph Hellwig | 5dd4056 | 2010-03-03 09:05:00 -0500 | [diff] [blame] | 611 | status = dquot_alloc_space_nodirty(inode, |
| 612 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
| 613 | if (status) |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 614 | goto leave; |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 615 | did_quota = 1; |
| 616 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 617 | /* reserve a write to the file entry early on - that we if we |
| 618 | * run out of credits in the allocation path, we can still |
| 619 | * update i_size. */ |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 620 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 621 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 622 | if (status < 0) { |
| 623 | mlog_errno(status); |
| 624 | goto leave; |
| 625 | } |
| 626 | |
| 627 | prev_clusters = OCFS2_I(inode)->ip_clusters; |
| 628 | |
Tao Ma | 0eb8d47 | 2008-08-18 17:38:45 +0800 | [diff] [blame] | 629 | status = ocfs2_add_inode_data(osb, |
| 630 | inode, |
| 631 | &logical_start, |
| 632 | clusters_to_add, |
| 633 | mark_unwritten, |
| 634 | bh, |
| 635 | handle, |
| 636 | data_ac, |
| 637 | meta_ac, |
| 638 | &why); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 639 | if ((status < 0) && (status != -EAGAIN)) { |
| 640 | if (status != -ENOSPC) |
| 641 | mlog_errno(status); |
| 642 | goto leave; |
| 643 | } |
| 644 | |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 645 | ocfs2_journal_dirty(handle, bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 646 | |
| 647 | spin_lock(&OCFS2_I(inode)->ip_lock); |
| 648 | clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters); |
| 649 | spin_unlock(&OCFS2_I(inode)->ip_lock); |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 650 | /* Release unused quota reservation */ |
Christoph Hellwig | 5dd4056 | 2010-03-03 09:05:00 -0500 | [diff] [blame] | 651 | dquot_free_space(inode, |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 652 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
| 653 | did_quota = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 654 | |
| 655 | if (why != RESTART_NONE && clusters_to_add) { |
| 656 | if (why == RESTART_META) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 657 | restart_func = 1; |
Tao Ma | 7968184 | 2010-04-16 13:59:25 +0800 | [diff] [blame] | 658 | status = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 659 | } else { |
| 660 | BUG_ON(why != RESTART_TRANS); |
| 661 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 662 | /* TODO: This can be more intelligent. */ |
| 663 | credits = ocfs2_calc_extend_credits(osb->sb, |
Tao Ma | 811f933 | 2008-08-18 17:38:43 +0800 | [diff] [blame] | 664 | &fe->id2.i_list, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 665 | clusters_to_add); |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 666 | status = ocfs2_extend_trans(handle, credits); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 667 | if (status < 0) { |
| 668 | /* handle still has to be committed at |
| 669 | * this point. */ |
| 670 | status = -ENOMEM; |
| 671 | mlog_errno(status); |
| 672 | goto leave; |
| 673 | } |
| 674 | goto restarted_transaction; |
| 675 | } |
| 676 | } |
| 677 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 678 | trace_ocfs2_extend_allocation_end(OCFS2_I(inode)->ip_blkno, |
Mark Fasheh | 1ca1a11 | 2007-04-27 16:01:25 -0700 | [diff] [blame] | 679 | le32_to_cpu(fe->i_clusters), |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 680 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 681 | OCFS2_I(inode)->ip_clusters, |
| 682 | (unsigned long long)i_size_read(inode)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 683 | |
| 684 | leave: |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 685 | if (status < 0 && did_quota) |
Christoph Hellwig | 5dd4056 | 2010-03-03 09:05:00 -0500 | [diff] [blame] | 686 | dquot_free_space(inode, |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 687 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 688 | if (handle) { |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 689 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 690 | handle = NULL; |
| 691 | } |
| 692 | if (data_ac) { |
| 693 | ocfs2_free_alloc_context(data_ac); |
| 694 | data_ac = NULL; |
| 695 | } |
| 696 | if (meta_ac) { |
| 697 | ocfs2_free_alloc_context(meta_ac); |
| 698 | meta_ac = NULL; |
| 699 | } |
| 700 | if ((!status) && restart_func) { |
| 701 | restart_func = 0; |
| 702 | goto restart_all; |
| 703 | } |
Mark Fasheh | a81cb88 | 2008-10-07 14:25:16 -0700 | [diff] [blame] | 704 | brelse(bh); |
| 705 | bh = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 706 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 707 | return status; |
| 708 | } |
| 709 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 710 | /* |
| 711 | * While a write will already be ordering the data, a truncate will not. |
| 712 | * Thus, we need to explicitly order the zeroed pages. |
| 713 | */ |
| 714 | static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode) |
| 715 | { |
| 716 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 717 | handle_t *handle = NULL; |
| 718 | int ret = 0; |
| 719 | |
| 720 | if (!ocfs2_should_order_data(inode)) |
| 721 | goto out; |
| 722 | |
| 723 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| 724 | if (IS_ERR(handle)) { |
| 725 | ret = -ENOMEM; |
| 726 | mlog_errno(ret); |
| 727 | goto out; |
| 728 | } |
| 729 | |
| 730 | ret = ocfs2_jbd2_file_inode(handle, inode); |
| 731 | if (ret < 0) |
| 732 | mlog_errno(ret); |
| 733 | |
| 734 | out: |
| 735 | if (ret) { |
| 736 | if (!IS_ERR(handle)) |
| 737 | ocfs2_commit_trans(osb, handle); |
| 738 | handle = ERR_PTR(ret); |
| 739 | } |
| 740 | return handle; |
| 741 | } |
| 742 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 743 | /* Some parts of this taken from generic_cont_expand, which turned out |
| 744 | * to be too fragile to do exactly what we need without us having to |
Nick Piggin | 4e02ed4 | 2008-10-29 14:00:55 -0700 | [diff] [blame] | 745 | * worry about recursive locking in ->write_begin() and ->write_end(). */ |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 746 | static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from, |
| 747 | u64 abs_to) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 748 | { |
| 749 | struct address_space *mapping = inode->i_mapping; |
| 750 | struct page *page; |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 751 | unsigned long index = abs_from >> PAGE_CACHE_SHIFT; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 752 | handle_t *handle = NULL; |
Joel Becker | 5453258 | 2010-07-16 13:32:33 -0700 | [diff] [blame] | 753 | int ret = 0; |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 754 | unsigned zero_from, zero_to, block_start, block_end; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 755 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 756 | BUG_ON(abs_from >= abs_to); |
| 757 | BUG_ON(abs_to > (((u64)index + 1) << PAGE_CACHE_SHIFT)); |
| 758 | BUG_ON(abs_from & (inode->i_blkbits - 1)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 759 | |
Jan Kara | 9b4c0ff | 2010-08-24 14:28:03 +0200 | [diff] [blame] | 760 | page = find_or_create_page(mapping, index, GFP_NOFS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 761 | if (!page) { |
| 762 | ret = -ENOMEM; |
| 763 | mlog_errno(ret); |
| 764 | goto out; |
| 765 | } |
| 766 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 767 | /* Get the offsets within the page that we want to zero */ |
| 768 | zero_from = abs_from & (PAGE_CACHE_SIZE - 1); |
| 769 | zero_to = abs_to & (PAGE_CACHE_SIZE - 1); |
| 770 | if (!zero_to) |
| 771 | zero_to = PAGE_CACHE_SIZE; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 772 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 773 | trace_ocfs2_write_zero_page( |
| 774 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 775 | (unsigned long long)abs_from, |
| 776 | (unsigned long long)abs_to, |
| 777 | index, zero_from, zero_to); |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 778 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 779 | /* We know that zero_from is block aligned */ |
| 780 | for (block_start = zero_from; block_start < zero_to; |
| 781 | block_start = block_end) { |
| 782 | block_end = block_start + (1 << inode->i_blkbits); |
| 783 | |
| 784 | /* |
Christoph Hellwig | ebdec24 | 2010-10-06 10:47:23 +0200 | [diff] [blame] | 785 | * block_start is block-aligned. Bump it by one to force |
| 786 | * __block_write_begin and block_commit_write to zero the |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 787 | * whole block. |
| 788 | */ |
Christoph Hellwig | ebdec24 | 2010-10-06 10:47:23 +0200 | [diff] [blame] | 789 | ret = __block_write_begin(page, block_start + 1, 0, |
| 790 | ocfs2_get_block); |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 791 | if (ret < 0) { |
| 792 | mlog_errno(ret); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 793 | goto out_unlock; |
| 794 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 795 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 796 | if (!handle) { |
| 797 | handle = ocfs2_zero_start_ordered_transaction(inode); |
| 798 | if (IS_ERR(handle)) { |
| 799 | ret = PTR_ERR(handle); |
| 800 | handle = NULL; |
| 801 | break; |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | /* must not update i_size! */ |
| 806 | ret = block_commit_write(page, block_start + 1, |
| 807 | block_start + 1); |
| 808 | if (ret < 0) |
| 809 | mlog_errno(ret); |
| 810 | else |
| 811 | ret = 0; |
| 812 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 813 | |
| 814 | if (handle) |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 815 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 816 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 817 | out_unlock: |
| 818 | unlock_page(page); |
| 819 | page_cache_release(page); |
| 820 | out: |
| 821 | return ret; |
| 822 | } |
| 823 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 824 | /* |
| 825 | * Find the next range to zero. We do this in terms of bytes because |
| 826 | * that's what ocfs2_zero_extend() wants, and it is dealing with the |
| 827 | * pagecache. We may return multiple extents. |
| 828 | * |
| 829 | * zero_start and zero_end are ocfs2_zero_extend()s current idea of what |
| 830 | * needs to be zeroed. range_start and range_end return the next zeroing |
| 831 | * range. A subsequent call should pass the previous range_end as its |
| 832 | * zero_start. If range_end is 0, there's nothing to do. |
| 833 | * |
| 834 | * Unwritten extents are skipped over. Refcounted extents are CoWd. |
| 835 | */ |
| 836 | static int ocfs2_zero_extend_get_range(struct inode *inode, |
| 837 | struct buffer_head *di_bh, |
| 838 | u64 zero_start, u64 zero_end, |
| 839 | u64 *range_start, u64 *range_end) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 840 | { |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 841 | int rc = 0, needs_cow = 0; |
| 842 | u32 p_cpos, zero_clusters = 0; |
| 843 | u32 zero_cpos = |
| 844 | zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 845 | u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end); |
| 846 | unsigned int num_clusters = 0; |
| 847 | unsigned int ext_flags = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 848 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 849 | while (zero_cpos < last_cpos) { |
| 850 | rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos, |
| 851 | &num_clusters, &ext_flags); |
| 852 | if (rc) { |
| 853 | mlog_errno(rc); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 854 | goto out; |
| 855 | } |
| 856 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 857 | if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) { |
| 858 | zero_clusters = num_clusters; |
| 859 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
| 860 | needs_cow = 1; |
| 861 | break; |
| 862 | } |
| 863 | |
| 864 | zero_cpos += num_clusters; |
| 865 | } |
| 866 | if (!zero_clusters) { |
| 867 | *range_end = 0; |
| 868 | goto out; |
| 869 | } |
| 870 | |
| 871 | while ((zero_cpos + zero_clusters) < last_cpos) { |
| 872 | rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters, |
| 873 | &p_cpos, &num_clusters, |
| 874 | &ext_flags); |
| 875 | if (rc) { |
| 876 | mlog_errno(rc); |
| 877 | goto out; |
| 878 | } |
| 879 | |
| 880 | if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN)) |
| 881 | break; |
| 882 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
| 883 | needs_cow = 1; |
| 884 | zero_clusters += num_clusters; |
| 885 | } |
| 886 | if ((zero_cpos + zero_clusters) > last_cpos) |
| 887 | zero_clusters = last_cpos - zero_cpos; |
| 888 | |
| 889 | if (needs_cow) { |
Tao Ma | 1550271 | 2010-08-12 10:36:38 +0800 | [diff] [blame] | 890 | rc = ocfs2_refcount_cow(inode, NULL, di_bh, zero_cpos, |
| 891 | zero_clusters, UINT_MAX); |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 892 | if (rc) { |
| 893 | mlog_errno(rc); |
| 894 | goto out; |
| 895 | } |
| 896 | } |
| 897 | |
| 898 | *range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos); |
| 899 | *range_end = ocfs2_clusters_to_bytes(inode->i_sb, |
| 900 | zero_cpos + zero_clusters); |
| 901 | |
| 902 | out: |
| 903 | return rc; |
| 904 | } |
| 905 | |
| 906 | /* |
| 907 | * Zero one range returned from ocfs2_zero_extend_get_range(). The caller |
| 908 | * has made sure that the entire range needs zeroing. |
| 909 | */ |
| 910 | static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start, |
| 911 | u64 range_end) |
| 912 | { |
| 913 | int rc = 0; |
| 914 | u64 next_pos; |
| 915 | u64 zero_pos = range_start; |
| 916 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 917 | trace_ocfs2_zero_extend_range( |
| 918 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 919 | (unsigned long long)range_start, |
| 920 | (unsigned long long)range_end); |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 921 | BUG_ON(range_start >= range_end); |
| 922 | |
| 923 | while (zero_pos < range_end) { |
| 924 | next_pos = (zero_pos & PAGE_CACHE_MASK) + PAGE_CACHE_SIZE; |
| 925 | if (next_pos > range_end) |
| 926 | next_pos = range_end; |
| 927 | rc = ocfs2_write_zero_page(inode, zero_pos, next_pos); |
| 928 | if (rc < 0) { |
| 929 | mlog_errno(rc); |
| 930 | break; |
| 931 | } |
| 932 | zero_pos = next_pos; |
Mark Fasheh | e2057c5 | 2006-10-03 17:53:05 -0700 | [diff] [blame] | 933 | |
| 934 | /* |
| 935 | * Very large extends have the potential to lock up |
| 936 | * the cpu for extended periods of time. |
| 937 | */ |
| 938 | cond_resched(); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 939 | } |
| 940 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 941 | return rc; |
| 942 | } |
| 943 | |
| 944 | int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh, |
| 945 | loff_t zero_to_size) |
| 946 | { |
| 947 | int ret = 0; |
| 948 | u64 zero_start, range_start = 0, range_end = 0; |
| 949 | struct super_block *sb = inode->i_sb; |
| 950 | |
| 951 | zero_start = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode)); |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 952 | trace_ocfs2_zero_extend((unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 953 | (unsigned long long)zero_start, |
| 954 | (unsigned long long)i_size_read(inode)); |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 955 | while (zero_start < zero_to_size) { |
| 956 | ret = ocfs2_zero_extend_get_range(inode, di_bh, zero_start, |
| 957 | zero_to_size, |
| 958 | &range_start, |
| 959 | &range_end); |
| 960 | if (ret) { |
| 961 | mlog_errno(ret); |
| 962 | break; |
| 963 | } |
| 964 | if (!range_end) |
| 965 | break; |
| 966 | /* Trim the ends */ |
| 967 | if (range_start < zero_start) |
| 968 | range_start = zero_start; |
| 969 | if (range_end > zero_to_size) |
| 970 | range_end = zero_to_size; |
| 971 | |
| 972 | ret = ocfs2_zero_extend_range(inode, range_start, |
| 973 | range_end); |
| 974 | if (ret) { |
| 975 | mlog_errno(ret); |
| 976 | break; |
| 977 | } |
| 978 | zero_start = range_end; |
| 979 | } |
| 980 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 981 | return ret; |
| 982 | } |
| 983 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 984 | int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh, |
| 985 | u64 new_i_size, u64 zero_to) |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 986 | { |
| 987 | int ret; |
| 988 | u32 clusters_to_add; |
| 989 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 990 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 991 | /* |
| 992 | * Only quota files call this without a bh, and they can't be |
| 993 | * refcounted. |
| 994 | */ |
| 995 | BUG_ON(!di_bh && (oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)); |
| 996 | BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE)); |
| 997 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 998 | clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size); |
| 999 | if (clusters_to_add < oi->ip_clusters) |
| 1000 | clusters_to_add = 0; |
| 1001 | else |
| 1002 | clusters_to_add -= oi->ip_clusters; |
| 1003 | |
| 1004 | if (clusters_to_add) { |
| 1005 | ret = __ocfs2_extend_allocation(inode, oi->ip_clusters, |
| 1006 | clusters_to_add, 0); |
| 1007 | if (ret) { |
| 1008 | mlog_errno(ret); |
| 1009 | goto out; |
| 1010 | } |
| 1011 | } |
| 1012 | |
| 1013 | /* |
| 1014 | * Call this even if we don't add any clusters to the tree. We |
| 1015 | * still need to zero the area between the old i_size and the |
| 1016 | * new i_size. |
| 1017 | */ |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 1018 | ret = ocfs2_zero_extend(inode, di_bh, zero_to); |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1019 | if (ret < 0) |
| 1020 | mlog_errno(ret); |
| 1021 | |
| 1022 | out: |
| 1023 | return ret; |
| 1024 | } |
| 1025 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1026 | static int ocfs2_extend_file(struct inode *inode, |
| 1027 | struct buffer_head *di_bh, |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1028 | u64 new_i_size) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1029 | { |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 1030 | int ret = 0; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1031 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1032 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1033 | BUG_ON(!di_bh); |
Mark Fasheh | 53013cb | 2006-05-05 19:04:03 -0700 | [diff] [blame] | 1034 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1035 | /* setattr sometimes calls us like this. */ |
| 1036 | if (new_i_size == 0) |
| 1037 | goto out; |
| 1038 | |
| 1039 | if (i_size_read(inode) == new_i_size) |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 1040 | goto out; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1041 | BUG_ON(new_i_size < i_size_read(inode)); |
| 1042 | |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1043 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1044 | * The alloc sem blocks people in read/write from reading our |
| 1045 | * allocation until we're done changing it. We depend on |
| 1046 | * i_mutex to block other extend/truncate calls while we're |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 1047 | * here. We even have to hold it for sparse files because there |
| 1048 | * might be some tail zeroing. |
Mark Fasheh | 0effef7 | 2006-10-03 17:44:42 -0700 | [diff] [blame] | 1049 | */ |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1050 | down_write(&oi->ip_alloc_sem); |
| 1051 | |
| 1052 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 1053 | /* |
| 1054 | * We can optimize small extends by keeping the inodes |
| 1055 | * inline data. |
| 1056 | */ |
| 1057 | if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) { |
| 1058 | up_write(&oi->ip_alloc_sem); |
| 1059 | goto out_update_size; |
| 1060 | } |
| 1061 | |
| 1062 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); |
| 1063 | if (ret) { |
| 1064 | up_write(&oi->ip_alloc_sem); |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1065 | mlog_errno(ret); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 1066 | goto out; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1067 | } |
| 1068 | } |
| 1069 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 1070 | if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) |
| 1071 | ret = ocfs2_zero_extend(inode, di_bh, new_i_size); |
| 1072 | else |
| 1073 | ret = ocfs2_extend_no_holes(inode, di_bh, new_i_size, |
| 1074 | new_i_size); |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1075 | |
| 1076 | up_write(&oi->ip_alloc_sem); |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1077 | |
Mark Fasheh | 0effef7 | 2006-10-03 17:44:42 -0700 | [diff] [blame] | 1078 | if (ret < 0) { |
| 1079 | mlog_errno(ret); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 1080 | goto out; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1081 | } |
| 1082 | |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 1083 | out_update_size: |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1084 | ret = ocfs2_simple_size_update(inode, di_bh, new_i_size); |
| 1085 | if (ret < 0) |
| 1086 | mlog_errno(ret); |
Mark Fasheh | 53013cb | 2006-05-05 19:04:03 -0700 | [diff] [blame] | 1087 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1088 | out: |
| 1089 | return ret; |
| 1090 | } |
| 1091 | |
| 1092 | int ocfs2_setattr(struct dentry *dentry, struct iattr *attr) |
| 1093 | { |
| 1094 | int status = 0, size_change; |
| 1095 | struct inode *inode = dentry->d_inode; |
| 1096 | struct super_block *sb = inode->i_sb; |
| 1097 | struct ocfs2_super *osb = OCFS2_SB(sb); |
| 1098 | struct buffer_head *bh = NULL; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1099 | handle_t *handle = NULL; |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1100 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
Jan Kara | 52a9ee2 | 2010-05-13 20:18:45 +0200 | [diff] [blame] | 1101 | int qtype; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1102 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 1103 | trace_ocfs2_setattr(inode, dentry, |
| 1104 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 1105 | dentry->d_name.len, dentry->d_name.name, |
| 1106 | attr->ia_valid, attr->ia_mode, |
| 1107 | attr->ia_uid, attr->ia_gid); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1108 | |
Sunil Mushran | bc53580 | 2008-04-18 10:23:53 -0700 | [diff] [blame] | 1109 | /* ensuring we don't even attempt to truncate a symlink */ |
| 1110 | if (S_ISLNK(inode->i_mode)) |
| 1111 | attr->ia_valid &= ~ATTR_SIZE; |
| 1112 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1113 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ |
| 1114 | | ATTR_GID | ATTR_UID | ATTR_MODE) |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 1115 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1116 | return 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1117 | |
| 1118 | status = inode_change_ok(inode, attr); |
| 1119 | if (status) |
| 1120 | return status; |
| 1121 | |
Dmitry Monakhov | 1275562 | 2010-04-08 22:04:20 +0400 | [diff] [blame] | 1122 | if (is_quota_modification(inode, attr)) |
| 1123 | dquot_initialize(inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1124 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; |
| 1125 | if (size_change) { |
| 1126 | status = ocfs2_rw_lock(inode, 1); |
| 1127 | if (status < 0) { |
| 1128 | mlog_errno(status); |
| 1129 | goto bail; |
| 1130 | } |
| 1131 | } |
| 1132 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1133 | status = ocfs2_inode_lock(inode, &bh, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1134 | if (status < 0) { |
| 1135 | if (status != -ENOENT) |
| 1136 | mlog_errno(status); |
| 1137 | goto bail_unlock_rw; |
| 1138 | } |
| 1139 | |
| 1140 | if (size_change && attr->ia_size != i_size_read(inode)) { |
Wengang Wang | 5051f76 | 2010-02-26 18:18:25 +0800 | [diff] [blame] | 1141 | status = inode_newsize_ok(inode, attr->ia_size); |
| 1142 | if (status) |
Mark Fasheh | ce76fd3 | 2007-07-20 12:02:14 -0700 | [diff] [blame] | 1143 | goto bail_unlock; |
Mark Fasheh | ce76fd3 | 2007-07-20 12:02:14 -0700 | [diff] [blame] | 1144 | |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 1145 | if (i_size_read(inode) > attr->ia_size) { |
| 1146 | if (ocfs2_should_order_data(inode)) { |
| 1147 | status = ocfs2_begin_ordered_truncate(inode, |
| 1148 | attr->ia_size); |
| 1149 | if (status) |
| 1150 | goto bail_unlock; |
| 1151 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1152 | status = ocfs2_truncate_file(inode, bh, attr->ia_size); |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 1153 | } else |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1154 | status = ocfs2_extend_file(inode, bh, attr->ia_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1155 | if (status < 0) { |
| 1156 | if (status != -ENOSPC) |
| 1157 | mlog_errno(status); |
| 1158 | status = -ENOSPC; |
| 1159 | goto bail_unlock; |
| 1160 | } |
| 1161 | } |
| 1162 | |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1163 | if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) || |
| 1164 | (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1165 | /* |
| 1166 | * Gather pointers to quota structures so that allocation / |
| 1167 | * freeing of quota structures happens here and not inside |
Christoph Hellwig | b43fa82 | 2010-03-03 09:05:03 -0500 | [diff] [blame] | 1168 | * dquot_transfer() where we have problems with lock ordering |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1169 | */ |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1170 | if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid |
| 1171 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
| 1172 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1173 | transfer_to[USRQUOTA] = dqget(sb, attr->ia_uid, |
| 1174 | USRQUOTA); |
Jan Kara | 52a9ee2 | 2010-05-13 20:18:45 +0200 | [diff] [blame] | 1175 | if (!transfer_to[USRQUOTA]) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1176 | status = -ESRCH; |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1177 | goto bail_unlock; |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1178 | } |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1179 | } |
| 1180 | if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid |
| 1181 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
| 1182 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1183 | transfer_to[GRPQUOTA] = dqget(sb, attr->ia_gid, |
| 1184 | GRPQUOTA); |
Jan Kara | 52a9ee2 | 2010-05-13 20:18:45 +0200 | [diff] [blame] | 1185 | if (!transfer_to[GRPQUOTA]) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1186 | status = -ESRCH; |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1187 | goto bail_unlock; |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1188 | } |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1189 | } |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1190 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS + |
| 1191 | 2 * ocfs2_quota_trans_credits(sb)); |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1192 | if (IS_ERR(handle)) { |
| 1193 | status = PTR_ERR(handle); |
| 1194 | mlog_errno(status); |
| 1195 | goto bail_unlock; |
| 1196 | } |
Jan Kara | 52a9ee2 | 2010-05-13 20:18:45 +0200 | [diff] [blame] | 1197 | status = __dquot_transfer(inode, transfer_to); |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1198 | if (status < 0) |
| 1199 | goto bail_commit; |
| 1200 | } else { |
| 1201 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| 1202 | if (IS_ERR(handle)) { |
| 1203 | status = PTR_ERR(handle); |
| 1204 | mlog_errno(status); |
| 1205 | goto bail_unlock; |
| 1206 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1207 | } |
| 1208 | |
Mark Fasheh | 7307de8 | 2007-05-09 15:16:19 -0700 | [diff] [blame] | 1209 | /* |
Christoph Hellwig | 2c27c65 | 2010-06-04 11:30:04 +0200 | [diff] [blame] | 1210 | * This will intentionally not wind up calling truncate_setsize(), |
Mark Fasheh | 7307de8 | 2007-05-09 15:16:19 -0700 | [diff] [blame] | 1211 | * since all the work for a size change has been done above. |
| 1212 | * Otherwise, we could get into problems with truncate as |
| 1213 | * ip_alloc_sem is used there to protect against i_size |
| 1214 | * changes. |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1215 | * |
| 1216 | * XXX: this means the conditional below can probably be removed. |
Mark Fasheh | 7307de8 | 2007-05-09 15:16:19 -0700 | [diff] [blame] | 1217 | */ |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1218 | if ((attr->ia_valid & ATTR_SIZE) && |
| 1219 | attr->ia_size != i_size_read(inode)) { |
| 1220 | status = vmtruncate(inode, attr->ia_size); |
| 1221 | if (status) { |
| 1222 | mlog_errno(status); |
| 1223 | goto bail_commit; |
| 1224 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1225 | } |
| 1226 | |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1227 | setattr_copy(inode, attr); |
| 1228 | mark_inode_dirty(inode); |
| 1229 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1230 | status = ocfs2_mark_inode_dirty(handle, inode, bh); |
| 1231 | if (status < 0) |
| 1232 | mlog_errno(status); |
| 1233 | |
| 1234 | bail_commit: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 1235 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1236 | bail_unlock: |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1237 | ocfs2_inode_unlock(inode, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1238 | bail_unlock_rw: |
| 1239 | if (size_change) |
| 1240 | ocfs2_rw_unlock(inode, 1); |
| 1241 | bail: |
Mark Fasheh | a81cb88 | 2008-10-07 14:25:16 -0700 | [diff] [blame] | 1242 | brelse(bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1243 | |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1244 | /* Release quota pointers in case we acquired them */ |
Jan Kara | 52a9ee2 | 2010-05-13 20:18:45 +0200 | [diff] [blame] | 1245 | for (qtype = 0; qtype < MAXQUOTAS; qtype++) |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1246 | dqput(transfer_to[qtype]); |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1247 | |
Tiger Yang | 060bc66 | 2008-11-14 11:17:29 +0800 | [diff] [blame] | 1248 | if (!status && attr->ia_valid & ATTR_MODE) { |
| 1249 | status = ocfs2_acl_chmod(inode); |
| 1250 | if (status < 0) |
| 1251 | mlog_errno(status); |
| 1252 | } |
| 1253 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1254 | return status; |
| 1255 | } |
| 1256 | |
| 1257 | int ocfs2_getattr(struct vfsmount *mnt, |
| 1258 | struct dentry *dentry, |
| 1259 | struct kstat *stat) |
| 1260 | { |
| 1261 | struct inode *inode = dentry->d_inode; |
| 1262 | struct super_block *sb = dentry->d_inode->i_sb; |
| 1263 | struct ocfs2_super *osb = sb->s_fs_info; |
| 1264 | int err; |
| 1265 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1266 | err = ocfs2_inode_revalidate(dentry); |
| 1267 | if (err) { |
| 1268 | if (err != -ENOENT) |
| 1269 | mlog_errno(err); |
| 1270 | goto bail; |
| 1271 | } |
| 1272 | |
| 1273 | generic_fillattr(inode, stat); |
| 1274 | |
| 1275 | /* We set the blksize from the cluster size for performance */ |
| 1276 | stat->blksize = osb->s_clustersize; |
| 1277 | |
| 1278 | bail: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1279 | return err; |
| 1280 | } |
| 1281 | |
Nick Piggin | b74c79e | 2011-01-07 17:49:58 +1100 | [diff] [blame] | 1282 | int ocfs2_permission(struct inode *inode, int mask, unsigned int flags) |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1283 | { |
| 1284 | int ret; |
| 1285 | |
Nick Piggin | b74c79e | 2011-01-07 17:49:58 +1100 | [diff] [blame] | 1286 | if (flags & IPERM_FLAG_RCU) |
| 1287 | return -ECHILD; |
| 1288 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1289 | ret = ocfs2_inode_lock(inode, NULL, 0); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1290 | if (ret) { |
Mark Fasheh | a9f5f70 | 2007-04-26 11:43:43 -0700 | [diff] [blame] | 1291 | if (ret != -ENOENT) |
| 1292 | mlog_errno(ret); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1293 | goto out; |
| 1294 | } |
| 1295 | |
Nick Piggin | b74c79e | 2011-01-07 17:49:58 +1100 | [diff] [blame] | 1296 | ret = generic_permission(inode, mask, flags, ocfs2_check_acl); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1297 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1298 | ocfs2_inode_unlock(inode, 0); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1299 | out: |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1300 | return ret; |
| 1301 | } |
| 1302 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1303 | static int __ocfs2_write_remove_suid(struct inode *inode, |
| 1304 | struct buffer_head *bh) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1305 | { |
| 1306 | int ret; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1307 | handle_t *handle; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1308 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1309 | struct ocfs2_dinode *di; |
| 1310 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 1311 | trace_ocfs2_write_remove_suid( |
| 1312 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 1313 | inode->i_mode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1314 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 1315 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 1316 | if (IS_ERR(handle)) { |
| 1317 | ret = PTR_ERR(handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1318 | mlog_errno(ret); |
| 1319 | goto out; |
| 1320 | } |
| 1321 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 1322 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 1323 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1324 | if (ret < 0) { |
| 1325 | mlog_errno(ret); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1326 | goto out_trans; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1327 | } |
| 1328 | |
| 1329 | inode->i_mode &= ~S_ISUID; |
| 1330 | if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP)) |
| 1331 | inode->i_mode &= ~S_ISGID; |
| 1332 | |
| 1333 | di = (struct ocfs2_dinode *) bh->b_data; |
| 1334 | di->i_mode = cpu_to_le16(inode->i_mode); |
| 1335 | |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 1336 | ocfs2_journal_dirty(handle, bh); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1337 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1338 | out_trans: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 1339 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1340 | out: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1341 | return ret; |
| 1342 | } |
| 1343 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1344 | /* |
| 1345 | * Will look for holes and unwritten extents in the range starting at |
| 1346 | * pos for count bytes (inclusive). |
| 1347 | */ |
| 1348 | static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos, |
| 1349 | size_t count) |
| 1350 | { |
| 1351 | int ret = 0; |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1352 | unsigned int extent_flags; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1353 | u32 cpos, clusters, extent_len, phys_cpos; |
| 1354 | struct super_block *sb = inode->i_sb; |
| 1355 | |
| 1356 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; |
| 1357 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; |
| 1358 | |
| 1359 | while (clusters) { |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1360 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
| 1361 | &extent_flags); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1362 | if (ret < 0) { |
| 1363 | mlog_errno(ret); |
| 1364 | goto out; |
| 1365 | } |
| 1366 | |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1367 | if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1368 | ret = 1; |
| 1369 | break; |
| 1370 | } |
| 1371 | |
| 1372 | if (extent_len > clusters) |
| 1373 | extent_len = clusters; |
| 1374 | |
| 1375 | clusters -= extent_len; |
| 1376 | cpos += extent_len; |
| 1377 | } |
| 1378 | out: |
| 1379 | return ret; |
| 1380 | } |
| 1381 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1382 | static int ocfs2_write_remove_suid(struct inode *inode) |
| 1383 | { |
| 1384 | int ret; |
| 1385 | struct buffer_head *bh = NULL; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1386 | |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 1387 | ret = ocfs2_read_inode_block(inode, &bh); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1388 | if (ret < 0) { |
| 1389 | mlog_errno(ret); |
| 1390 | goto out; |
| 1391 | } |
| 1392 | |
| 1393 | ret = __ocfs2_write_remove_suid(inode, bh); |
| 1394 | out: |
| 1395 | brelse(bh); |
| 1396 | return ret; |
| 1397 | } |
| 1398 | |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1399 | /* |
| 1400 | * Allocate enough extents to cover the region starting at byte offset |
| 1401 | * start for len bytes. Existing extents are skipped, any extents |
| 1402 | * added are marked as "unwritten". |
| 1403 | */ |
| 1404 | static int ocfs2_allocate_unwritten_extents(struct inode *inode, |
| 1405 | u64 start, u64 len) |
| 1406 | { |
| 1407 | int ret; |
| 1408 | u32 cpos, phys_cpos, clusters, alloc_size; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1409 | u64 end = start + len; |
| 1410 | struct buffer_head *di_bh = NULL; |
| 1411 | |
| 1412 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 1413 | ret = ocfs2_read_inode_block(inode, &di_bh); |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1414 | if (ret) { |
| 1415 | mlog_errno(ret); |
| 1416 | goto out; |
| 1417 | } |
| 1418 | |
| 1419 | /* |
| 1420 | * Nothing to do if the requested reservation range |
| 1421 | * fits within the inode. |
| 1422 | */ |
| 1423 | if (ocfs2_size_fits_inline_data(di_bh, end)) |
| 1424 | goto out; |
| 1425 | |
| 1426 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); |
| 1427 | if (ret) { |
| 1428 | mlog_errno(ret); |
| 1429 | goto out; |
| 1430 | } |
| 1431 | } |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1432 | |
| 1433 | /* |
| 1434 | * We consider both start and len to be inclusive. |
| 1435 | */ |
| 1436 | cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 1437 | clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len); |
| 1438 | clusters -= cpos; |
| 1439 | |
| 1440 | while (clusters) { |
| 1441 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, |
| 1442 | &alloc_size, NULL); |
| 1443 | if (ret) { |
| 1444 | mlog_errno(ret); |
| 1445 | goto out; |
| 1446 | } |
| 1447 | |
| 1448 | /* |
| 1449 | * Hole or existing extent len can be arbitrary, so |
| 1450 | * cap it to our own allocation request. |
| 1451 | */ |
| 1452 | if (alloc_size > clusters) |
| 1453 | alloc_size = clusters; |
| 1454 | |
| 1455 | if (phys_cpos) { |
| 1456 | /* |
| 1457 | * We already have an allocation at this |
| 1458 | * region so we can safely skip it. |
| 1459 | */ |
| 1460 | goto next; |
| 1461 | } |
| 1462 | |
| 1463 | ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1); |
| 1464 | if (ret) { |
| 1465 | if (ret != -ENOSPC) |
| 1466 | mlog_errno(ret); |
| 1467 | goto out; |
| 1468 | } |
| 1469 | |
| 1470 | next: |
| 1471 | cpos += alloc_size; |
| 1472 | clusters -= alloc_size; |
| 1473 | } |
| 1474 | |
| 1475 | ret = 0; |
| 1476 | out: |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1477 | |
| 1478 | brelse(di_bh); |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1479 | return ret; |
| 1480 | } |
| 1481 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1482 | /* |
| 1483 | * Truncate a byte range, avoiding pages within partial clusters. This |
| 1484 | * preserves those pages for the zeroing code to write to. |
| 1485 | */ |
| 1486 | static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start, |
| 1487 | u64 byte_len) |
| 1488 | { |
| 1489 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1490 | loff_t start, end; |
| 1491 | struct address_space *mapping = inode->i_mapping; |
| 1492 | |
| 1493 | start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start); |
| 1494 | end = byte_start + byte_len; |
| 1495 | end = end & ~(osb->s_clustersize - 1); |
| 1496 | |
| 1497 | if (start < end) { |
| 1498 | unmap_mapping_range(mapping, start, end - start, 0); |
| 1499 | truncate_inode_pages_range(mapping, start, end - 1); |
| 1500 | } |
| 1501 | } |
| 1502 | |
| 1503 | static int ocfs2_zero_partial_clusters(struct inode *inode, |
| 1504 | u64 start, u64 len) |
| 1505 | { |
| 1506 | int ret = 0; |
| 1507 | u64 tmpend, end = start + len; |
| 1508 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1509 | unsigned int csize = osb->s_clustersize; |
| 1510 | handle_t *handle; |
| 1511 | |
| 1512 | /* |
| 1513 | * The "start" and "end" values are NOT necessarily part of |
| 1514 | * the range whose allocation is being deleted. Rather, this |
| 1515 | * is what the user passed in with the request. We must zero |
| 1516 | * partial clusters here. There's no need to worry about |
| 1517 | * physical allocation - the zeroing code knows to skip holes. |
| 1518 | */ |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 1519 | trace_ocfs2_zero_partial_clusters( |
| 1520 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 1521 | (unsigned long long)start, (unsigned long long)end); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1522 | |
| 1523 | /* |
| 1524 | * If both edges are on a cluster boundary then there's no |
| 1525 | * zeroing required as the region is part of the allocation to |
| 1526 | * be truncated. |
| 1527 | */ |
| 1528 | if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0) |
| 1529 | goto out; |
| 1530 | |
| 1531 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 1532 | if (IS_ERR(handle)) { |
| 1533 | ret = PTR_ERR(handle); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1534 | mlog_errno(ret); |
| 1535 | goto out; |
| 1536 | } |
| 1537 | |
| 1538 | /* |
| 1539 | * We want to get the byte offset of the end of the 1st cluster. |
| 1540 | */ |
| 1541 | tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1)); |
| 1542 | if (tmpend > end) |
| 1543 | tmpend = end; |
| 1544 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 1545 | trace_ocfs2_zero_partial_clusters_range1((unsigned long long)start, |
| 1546 | (unsigned long long)tmpend); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1547 | |
| 1548 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend); |
| 1549 | if (ret) |
| 1550 | mlog_errno(ret); |
| 1551 | |
| 1552 | if (tmpend < end) { |
| 1553 | /* |
| 1554 | * This may make start and end equal, but the zeroing |
| 1555 | * code will skip any work in that case so there's no |
| 1556 | * need to catch it up here. |
| 1557 | */ |
| 1558 | start = end & ~(osb->s_clustersize - 1); |
| 1559 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 1560 | trace_ocfs2_zero_partial_clusters_range2( |
| 1561 | (unsigned long long)start, (unsigned long long)end); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1562 | |
| 1563 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, end); |
| 1564 | if (ret) |
| 1565 | mlog_errno(ret); |
| 1566 | } |
| 1567 | |
| 1568 | ocfs2_commit_trans(osb, handle); |
| 1569 | out: |
| 1570 | return ret; |
| 1571 | } |
| 1572 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1573 | static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos) |
| 1574 | { |
| 1575 | int i; |
| 1576 | struct ocfs2_extent_rec *rec = NULL; |
| 1577 | |
| 1578 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { |
| 1579 | |
| 1580 | rec = &el->l_recs[i]; |
| 1581 | |
| 1582 | if (le32_to_cpu(rec->e_cpos) < pos) |
| 1583 | break; |
| 1584 | } |
| 1585 | |
| 1586 | return i; |
| 1587 | } |
| 1588 | |
| 1589 | /* |
| 1590 | * Helper to calculate the punching pos and length in one run, we handle the |
| 1591 | * following three cases in order: |
| 1592 | * |
| 1593 | * - remove the entire record |
| 1594 | * - remove a partial record |
| 1595 | * - no record needs to be removed (hole-punching completed) |
| 1596 | */ |
| 1597 | static void ocfs2_calc_trunc_pos(struct inode *inode, |
| 1598 | struct ocfs2_extent_list *el, |
| 1599 | struct ocfs2_extent_rec *rec, |
| 1600 | u32 trunc_start, u32 *trunc_cpos, |
| 1601 | u32 *trunc_len, u32 *trunc_end, |
| 1602 | u64 *blkno, int *done) |
| 1603 | { |
| 1604 | int ret = 0; |
| 1605 | u32 coff, range; |
| 1606 | |
| 1607 | range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec); |
| 1608 | |
| 1609 | if (le32_to_cpu(rec->e_cpos) >= trunc_start) { |
Tristan Ye | 9a790ba | 2011-05-12 20:47:07 +0800 | [diff] [blame] | 1610 | /* |
| 1611 | * remove an entire extent record. |
| 1612 | */ |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1613 | *trunc_cpos = le32_to_cpu(rec->e_cpos); |
| 1614 | /* |
| 1615 | * Skip holes if any. |
| 1616 | */ |
| 1617 | if (range < *trunc_end) |
| 1618 | *trunc_end = range; |
| 1619 | *trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos); |
| 1620 | *blkno = le64_to_cpu(rec->e_blkno); |
| 1621 | *trunc_end = le32_to_cpu(rec->e_cpos); |
| 1622 | } else if (range > trunc_start) { |
Tristan Ye | 9a790ba | 2011-05-12 20:47:07 +0800 | [diff] [blame] | 1623 | /* |
| 1624 | * remove a partial extent record, which means we're |
| 1625 | * removing the last extent record. |
| 1626 | */ |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1627 | *trunc_cpos = trunc_start; |
Tristan Ye | 9a790ba | 2011-05-12 20:47:07 +0800 | [diff] [blame] | 1628 | /* |
| 1629 | * skip hole if any. |
| 1630 | */ |
| 1631 | if (range < *trunc_end) |
| 1632 | *trunc_end = range; |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1633 | *trunc_len = *trunc_end - trunc_start; |
| 1634 | coff = trunc_start - le32_to_cpu(rec->e_cpos); |
| 1635 | *blkno = le64_to_cpu(rec->e_blkno) + |
| 1636 | ocfs2_clusters_to_blocks(inode->i_sb, coff); |
| 1637 | *trunc_end = trunc_start; |
| 1638 | } else { |
| 1639 | /* |
| 1640 | * It may have two following possibilities: |
| 1641 | * |
| 1642 | * - last record has been removed |
| 1643 | * - trunc_start was within a hole |
| 1644 | * |
| 1645 | * both two cases mean the completion of hole punching. |
| 1646 | */ |
| 1647 | ret = 1; |
| 1648 | } |
| 1649 | |
| 1650 | *done = ret; |
| 1651 | } |
| 1652 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1653 | static int ocfs2_remove_inode_range(struct inode *inode, |
| 1654 | struct buffer_head *di_bh, u64 byte_start, |
| 1655 | u64 byte_len) |
| 1656 | { |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1657 | int ret = 0, flags = 0, done = 0, i; |
| 1658 | u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos; |
| 1659 | u32 cluster_in_el; |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1660 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1661 | struct ocfs2_cached_dealloc_ctxt dealloc; |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 1662 | struct address_space *mapping = inode->i_mapping; |
Mark Fasheh | fecc011 | 2008-11-12 15:16:38 -0800 | [diff] [blame] | 1663 | struct ocfs2_extent_tree et; |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1664 | struct ocfs2_path *path = NULL; |
| 1665 | struct ocfs2_extent_list *el = NULL; |
| 1666 | struct ocfs2_extent_rec *rec = NULL; |
Tristan Ye | e8aec06 | 2010-05-11 17:54:43 +0800 | [diff] [blame] | 1667 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1668 | u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1669 | |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 1670 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1671 | ocfs2_init_dealloc_ctxt(&dealloc); |
| 1672 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 1673 | trace_ocfs2_remove_inode_range( |
| 1674 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 1675 | (unsigned long long)byte_start, |
| 1676 | (unsigned long long)byte_len); |
| 1677 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1678 | if (byte_len == 0) |
| 1679 | return 0; |
| 1680 | |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1681 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 1682 | ret = ocfs2_truncate_inline(inode, di_bh, byte_start, |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 1683 | byte_start + byte_len, 0); |
| 1684 | if (ret) { |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1685 | mlog_errno(ret); |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 1686 | goto out; |
| 1687 | } |
| 1688 | /* |
| 1689 | * There's no need to get fancy with the page cache |
| 1690 | * truncate of an inline-data inode. We're talking |
| 1691 | * about less than a page here, which will be cached |
| 1692 | * in the dinode buffer anyway. |
| 1693 | */ |
| 1694 | unmap_mapping_range(mapping, 0, 0, 0); |
| 1695 | truncate_inode_pages(mapping, 0); |
| 1696 | goto out; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1697 | } |
| 1698 | |
Tristan Ye | e8aec06 | 2010-05-11 17:54:43 +0800 | [diff] [blame] | 1699 | /* |
| 1700 | * For reflinks, we may need to CoW 2 clusters which might be |
| 1701 | * partially zero'd later, if hole's start and end offset were |
| 1702 | * within one cluster(means is not exactly aligned to clustersize). |
| 1703 | */ |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1704 | |
Tristan Ye | e8aec06 | 2010-05-11 17:54:43 +0800 | [diff] [blame] | 1705 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) { |
| 1706 | |
| 1707 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start); |
| 1708 | if (ret) { |
| 1709 | mlog_errno(ret); |
| 1710 | goto out; |
| 1711 | } |
| 1712 | |
| 1713 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len); |
| 1714 | if (ret) { |
| 1715 | mlog_errno(ret); |
| 1716 | goto out; |
| 1717 | } |
| 1718 | } |
| 1719 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1720 | trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start); |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1721 | trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits; |
| 1722 | cluster_in_el = trunc_end; |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1723 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1724 | ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len); |
| 1725 | if (ret) { |
| 1726 | mlog_errno(ret); |
| 1727 | goto out; |
| 1728 | } |
| 1729 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1730 | path = ocfs2_new_path_from_et(&et); |
| 1731 | if (!path) { |
| 1732 | ret = -ENOMEM; |
| 1733 | mlog_errno(ret); |
| 1734 | goto out; |
| 1735 | } |
| 1736 | |
| 1737 | while (trunc_end > trunc_start) { |
| 1738 | |
| 1739 | ret = ocfs2_find_path(INODE_CACHE(inode), path, |
| 1740 | cluster_in_el); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1741 | if (ret) { |
| 1742 | mlog_errno(ret); |
| 1743 | goto out; |
| 1744 | } |
| 1745 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1746 | el = path_leaf_el(path); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1747 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1748 | i = ocfs2_find_rec(el, trunc_end); |
| 1749 | /* |
| 1750 | * Need to go to previous extent block. |
| 1751 | */ |
| 1752 | if (i < 0) { |
| 1753 | if (path->p_tree_depth == 0) |
| 1754 | break; |
| 1755 | |
| 1756 | ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, |
| 1757 | path, |
| 1758 | &cluster_in_el); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1759 | if (ret) { |
| 1760 | mlog_errno(ret); |
| 1761 | goto out; |
| 1762 | } |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1763 | |
| 1764 | /* |
| 1765 | * We've reached the leftmost extent block, |
| 1766 | * it's safe to leave. |
| 1767 | */ |
| 1768 | if (cluster_in_el == 0) |
| 1769 | break; |
| 1770 | |
| 1771 | /* |
| 1772 | * The 'pos' searched for previous extent block is |
| 1773 | * always one cluster less than actual trunc_end. |
| 1774 | */ |
| 1775 | trunc_end = cluster_in_el + 1; |
| 1776 | |
| 1777 | ocfs2_reinit_path(path, 1); |
| 1778 | |
| 1779 | continue; |
| 1780 | |
| 1781 | } else |
| 1782 | rec = &el->l_recs[i]; |
| 1783 | |
| 1784 | ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos, |
| 1785 | &trunc_len, &trunc_end, &blkno, &done); |
| 1786 | if (done) |
| 1787 | break; |
| 1788 | |
| 1789 | flags = rec->e_flags; |
| 1790 | phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno); |
| 1791 | |
| 1792 | ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos, |
| 1793 | phys_cpos, trunc_len, flags, |
| 1794 | &dealloc, refcount_loc); |
| 1795 | if (ret < 0) { |
| 1796 | mlog_errno(ret); |
| 1797 | goto out; |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1798 | } |
| 1799 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1800 | cluster_in_el = trunc_end; |
| 1801 | |
| 1802 | ocfs2_reinit_path(path, 1); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1803 | } |
| 1804 | |
| 1805 | ocfs2_truncate_cluster_pages(inode, byte_start, byte_len); |
| 1806 | |
| 1807 | out: |
| 1808 | ocfs2_schedule_truncate_log_flush(osb, 1); |
| 1809 | ocfs2_run_deallocs(osb, &dealloc); |
| 1810 | |
| 1811 | return ret; |
| 1812 | } |
| 1813 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1814 | /* |
| 1815 | * Parts of this function taken from xfs_change_file_space() |
| 1816 | */ |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1817 | static int __ocfs2_change_file_space(struct file *file, struct inode *inode, |
| 1818 | loff_t f_pos, unsigned int cmd, |
| 1819 | struct ocfs2_space_resv *sr, |
| 1820 | int change_size) |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1821 | { |
| 1822 | int ret; |
| 1823 | s64 llen; |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1824 | loff_t size; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1825 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1826 | struct buffer_head *di_bh = NULL; |
| 1827 | handle_t *handle; |
Mark Fasheh | a00cce3 | 2007-07-20 11:28:30 -0700 | [diff] [blame] | 1828 | unsigned long long max_off = inode->i_sb->s_maxbytes; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1829 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1830 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
| 1831 | return -EROFS; |
| 1832 | |
| 1833 | mutex_lock(&inode->i_mutex); |
| 1834 | |
| 1835 | /* |
| 1836 | * This prevents concurrent writes on other nodes |
| 1837 | */ |
| 1838 | ret = ocfs2_rw_lock(inode, 1); |
| 1839 | if (ret) { |
| 1840 | mlog_errno(ret); |
| 1841 | goto out; |
| 1842 | } |
| 1843 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1844 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1845 | if (ret) { |
| 1846 | mlog_errno(ret); |
| 1847 | goto out_rw_unlock; |
| 1848 | } |
| 1849 | |
| 1850 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { |
| 1851 | ret = -EPERM; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1852 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1853 | } |
| 1854 | |
| 1855 | switch (sr->l_whence) { |
| 1856 | case 0: /*SEEK_SET*/ |
| 1857 | break; |
| 1858 | case 1: /*SEEK_CUR*/ |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1859 | sr->l_start += f_pos; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1860 | break; |
| 1861 | case 2: /*SEEK_END*/ |
| 1862 | sr->l_start += i_size_read(inode); |
| 1863 | break; |
| 1864 | default: |
| 1865 | ret = -EINVAL; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1866 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1867 | } |
| 1868 | sr->l_whence = 0; |
| 1869 | |
| 1870 | llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len; |
| 1871 | |
| 1872 | if (sr->l_start < 0 |
| 1873 | || sr->l_start > max_off |
| 1874 | || (sr->l_start + llen) < 0 |
| 1875 | || (sr->l_start + llen) > max_off) { |
| 1876 | ret = -EINVAL; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1877 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1878 | } |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1879 | size = sr->l_start + sr->l_len; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1880 | |
| 1881 | if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) { |
| 1882 | if (sr->l_len <= 0) { |
| 1883 | ret = -EINVAL; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1884 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1885 | } |
| 1886 | } |
| 1887 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1888 | if (file && should_remove_suid(file->f_path.dentry)) { |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1889 | ret = __ocfs2_write_remove_suid(inode, di_bh); |
| 1890 | if (ret) { |
| 1891 | mlog_errno(ret); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1892 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1893 | } |
| 1894 | } |
| 1895 | |
| 1896 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 1897 | switch (cmd) { |
| 1898 | case OCFS2_IOC_RESVSP: |
| 1899 | case OCFS2_IOC_RESVSP64: |
| 1900 | /* |
| 1901 | * This takes unsigned offsets, but the signed ones we |
| 1902 | * pass have been checked against overflow above. |
| 1903 | */ |
| 1904 | ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start, |
| 1905 | sr->l_len); |
| 1906 | break; |
| 1907 | case OCFS2_IOC_UNRESVSP: |
| 1908 | case OCFS2_IOC_UNRESVSP64: |
| 1909 | ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start, |
| 1910 | sr->l_len); |
| 1911 | break; |
| 1912 | default: |
| 1913 | ret = -EINVAL; |
| 1914 | } |
| 1915 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 1916 | if (ret) { |
| 1917 | mlog_errno(ret); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1918 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1919 | } |
| 1920 | |
| 1921 | /* |
| 1922 | * We update c/mtime for these changes |
| 1923 | */ |
| 1924 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| 1925 | if (IS_ERR(handle)) { |
| 1926 | ret = PTR_ERR(handle); |
| 1927 | mlog_errno(ret); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1928 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1929 | } |
| 1930 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1931 | if (change_size && i_size_read(inode) < size) |
| 1932 | i_size_write(inode, size); |
| 1933 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1934 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 1935 | ret = ocfs2_mark_inode_dirty(handle, inode, di_bh); |
| 1936 | if (ret < 0) |
| 1937 | mlog_errno(ret); |
| 1938 | |
| 1939 | ocfs2_commit_trans(osb, handle); |
| 1940 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1941 | out_inode_unlock: |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1942 | brelse(di_bh); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1943 | ocfs2_inode_unlock(inode, 1); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1944 | out_rw_unlock: |
| 1945 | ocfs2_rw_unlock(inode, 1); |
| 1946 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1947 | out: |
Julia Lawall | c259ae5 | 2008-07-21 09:59:15 +0200 | [diff] [blame] | 1948 | mutex_unlock(&inode->i_mutex); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1949 | return ret; |
| 1950 | } |
| 1951 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1952 | int ocfs2_change_file_space(struct file *file, unsigned int cmd, |
| 1953 | struct ocfs2_space_resv *sr) |
| 1954 | { |
| 1955 | struct inode *inode = file->f_path.dentry->d_inode; |
Fernando Carrijo | c19a28e | 2009-01-07 18:09:08 -0800 | [diff] [blame] | 1956 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1957 | |
| 1958 | if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) && |
| 1959 | !ocfs2_writes_unwritten_extents(osb)) |
| 1960 | return -ENOTTY; |
| 1961 | else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) && |
| 1962 | !ocfs2_sparse_alloc(osb)) |
| 1963 | return -ENOTTY; |
| 1964 | |
| 1965 | if (!S_ISREG(inode->i_mode)) |
| 1966 | return -EINVAL; |
| 1967 | |
| 1968 | if (!(file->f_mode & FMODE_WRITE)) |
| 1969 | return -EBADF; |
| 1970 | |
| 1971 | return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0); |
| 1972 | } |
| 1973 | |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 1974 | static long ocfs2_fallocate(struct file *file, int mode, loff_t offset, |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1975 | loff_t len) |
| 1976 | { |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 1977 | struct inode *inode = file->f_path.dentry->d_inode; |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1978 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1979 | struct ocfs2_space_resv sr; |
| 1980 | int change_size = 1; |
Josef Bacik | db47fef | 2010-11-17 20:46:17 -0500 | [diff] [blame] | 1981 | int cmd = OCFS2_IOC_RESVSP64; |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1982 | |
Christoph Hellwig | 64c23e8 | 2011-01-14 13:07:30 +0100 | [diff] [blame] | 1983 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
| 1984 | return -EOPNOTSUPP; |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1985 | if (!ocfs2_writes_unwritten_extents(osb)) |
| 1986 | return -EOPNOTSUPP; |
| 1987 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1988 | if (mode & FALLOC_FL_KEEP_SIZE) |
| 1989 | change_size = 0; |
| 1990 | |
Josef Bacik | db47fef | 2010-11-17 20:46:17 -0500 | [diff] [blame] | 1991 | if (mode & FALLOC_FL_PUNCH_HOLE) |
| 1992 | cmd = OCFS2_IOC_UNRESVSP64; |
| 1993 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1994 | sr.l_whence = 0; |
| 1995 | sr.l_start = (s64)offset; |
| 1996 | sr.l_len = (s64)len; |
| 1997 | |
Josef Bacik | db47fef | 2010-11-17 20:46:17 -0500 | [diff] [blame] | 1998 | return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr, |
| 1999 | change_size); |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 2000 | } |
| 2001 | |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2002 | int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos, |
| 2003 | size_t count) |
| 2004 | { |
| 2005 | int ret = 0; |
| 2006 | unsigned int extent_flags; |
| 2007 | u32 cpos, clusters, extent_len, phys_cpos; |
| 2008 | struct super_block *sb = inode->i_sb; |
| 2009 | |
| 2010 | if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) || |
Tao Ma | 2f48d59 | 2009-10-15 11:10:49 +0800 | [diff] [blame] | 2011 | !(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) || |
| 2012 | OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2013 | return 0; |
| 2014 | |
| 2015 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; |
| 2016 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; |
| 2017 | |
| 2018 | while (clusters) { |
| 2019 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
| 2020 | &extent_flags); |
| 2021 | if (ret < 0) { |
| 2022 | mlog_errno(ret); |
| 2023 | goto out; |
| 2024 | } |
| 2025 | |
| 2026 | if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) { |
| 2027 | ret = 1; |
| 2028 | break; |
| 2029 | } |
| 2030 | |
| 2031 | if (extent_len > clusters) |
| 2032 | extent_len = clusters; |
| 2033 | |
| 2034 | clusters -= extent_len; |
| 2035 | cpos += extent_len; |
| 2036 | } |
| 2037 | out: |
| 2038 | return ret; |
| 2039 | } |
| 2040 | |
Mark Fasheh | a11f7e6 | 2011-06-22 14:23:38 -0700 | [diff] [blame^] | 2041 | static void ocfs2_aiodio_wait(struct inode *inode) |
| 2042 | { |
| 2043 | wait_queue_head_t *wq = ocfs2_ioend_wq(inode); |
| 2044 | |
| 2045 | wait_event(*wq, (atomic_read(&OCFS2_I(inode)->ip_unaligned_aio) == 0)); |
| 2046 | } |
| 2047 | |
| 2048 | static int ocfs2_is_io_unaligned(struct inode *inode, size_t count, loff_t pos) |
| 2049 | { |
| 2050 | int blockmask = inode->i_sb->s_blocksize - 1; |
| 2051 | loff_t final_size = pos + count; |
| 2052 | |
| 2053 | if ((pos & blockmask) || (final_size & blockmask)) |
| 2054 | return 1; |
| 2055 | return 0; |
| 2056 | } |
| 2057 | |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2058 | static int ocfs2_prepare_inode_for_refcount(struct inode *inode, |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2059 | struct file *file, |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2060 | loff_t pos, size_t count, |
| 2061 | int *meta_level) |
| 2062 | { |
| 2063 | int ret; |
| 2064 | struct buffer_head *di_bh = NULL; |
| 2065 | u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 2066 | u32 clusters = |
| 2067 | ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos; |
| 2068 | |
| 2069 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
| 2070 | if (ret) { |
| 2071 | mlog_errno(ret); |
| 2072 | goto out; |
| 2073 | } |
| 2074 | |
| 2075 | *meta_level = 1; |
| 2076 | |
Tao Ma | 1550271 | 2010-08-12 10:36:38 +0800 | [diff] [blame] | 2077 | ret = ocfs2_refcount_cow(inode, file, di_bh, cpos, clusters, UINT_MAX); |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2078 | if (ret) |
| 2079 | mlog_errno(ret); |
| 2080 | out: |
| 2081 | brelse(di_bh); |
| 2082 | return ret; |
| 2083 | } |
| 2084 | |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2085 | static int ocfs2_prepare_inode_for_write(struct file *file, |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2086 | loff_t *ppos, |
| 2087 | size_t count, |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2088 | int appending, |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2089 | int *direct_io, |
| 2090 | int *has_refcount) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2091 | { |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2092 | int ret = 0, meta_level = 0; |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2093 | struct dentry *dentry = file->f_path.dentry; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2094 | struct inode *inode = dentry->d_inode; |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 2095 | loff_t saved_pos = 0, end; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2096 | |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2097 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2098 | * We start with a read level meta lock and only jump to an ex |
| 2099 | * if we need to make modifications here. |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2100 | */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2101 | for(;;) { |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 2102 | ret = ocfs2_inode_lock(inode, NULL, meta_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2103 | if (ret < 0) { |
| 2104 | meta_level = -1; |
| 2105 | mlog_errno(ret); |
| 2106 | goto out; |
| 2107 | } |
| 2108 | |
| 2109 | /* Clear suid / sgid if necessary. We do this here |
| 2110 | * instead of later in the write path because |
| 2111 | * remove_suid() calls ->setattr without any hint that |
| 2112 | * we may have already done our cluster locking. Since |
| 2113 | * ocfs2_setattr() *must* take cluster locks to |
| 2114 | * proceeed, this will lead us to recursively lock the |
| 2115 | * inode. There's also the dinode i_size state which |
| 2116 | * can be lost via setattr during extending writes (we |
| 2117 | * set inode->i_size at the end of a write. */ |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2118 | if (should_remove_suid(dentry)) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2119 | if (meta_level == 0) { |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 2120 | ocfs2_inode_unlock(inode, meta_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2121 | meta_level = 1; |
| 2122 | continue; |
| 2123 | } |
| 2124 | |
| 2125 | ret = ocfs2_write_remove_suid(inode); |
| 2126 | if (ret < 0) { |
| 2127 | mlog_errno(ret); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2128 | goto out_unlock; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2129 | } |
| 2130 | } |
| 2131 | |
| 2132 | /* work on a copy of ppos until we're sure that we won't have |
| 2133 | * to recalculate it due to relocking. */ |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 2134 | if (appending) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2135 | saved_pos = i_size_read(inode); |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 2136 | else |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2137 | saved_pos = *ppos; |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 2138 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2139 | end = saved_pos + count; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2140 | |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2141 | ret = ocfs2_check_range_for_refcount(inode, saved_pos, count); |
| 2142 | if (ret == 1) { |
| 2143 | ocfs2_inode_unlock(inode, meta_level); |
| 2144 | meta_level = -1; |
| 2145 | |
| 2146 | ret = ocfs2_prepare_inode_for_refcount(inode, |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2147 | file, |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2148 | saved_pos, |
| 2149 | count, |
| 2150 | &meta_level); |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2151 | if (has_refcount) |
| 2152 | *has_refcount = 1; |
Wengang Wang | 96a1cc7 | 2010-02-09 14:57:45 +0800 | [diff] [blame] | 2153 | if (direct_io) |
| 2154 | *direct_io = 0; |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2155 | } |
| 2156 | |
| 2157 | if (ret < 0) { |
| 2158 | mlog_errno(ret); |
| 2159 | goto out_unlock; |
| 2160 | } |
| 2161 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2162 | /* |
| 2163 | * Skip the O_DIRECT checks if we don't need |
| 2164 | * them. |
| 2165 | */ |
| 2166 | if (!direct_io || !(*direct_io)) |
| 2167 | break; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2168 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2169 | /* |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 2170 | * There's no sane way to do direct writes to an inode |
| 2171 | * with inline data. |
| 2172 | */ |
| 2173 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 2174 | *direct_io = 0; |
| 2175 | break; |
| 2176 | } |
| 2177 | |
| 2178 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2179 | * Allowing concurrent direct writes means |
| 2180 | * i_size changes wouldn't be synchronized, so |
| 2181 | * one node could wind up truncating another |
| 2182 | * nodes writes. |
| 2183 | */ |
| 2184 | if (end > i_size_read(inode)) { |
| 2185 | *direct_io = 0; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2186 | break; |
| 2187 | } |
| 2188 | |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 2189 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2190 | * We don't fill holes during direct io, so |
| 2191 | * check for them here. If any are found, the |
| 2192 | * caller will have to retake some cluster |
| 2193 | * locks and initiate the io as buffered. |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 2194 | */ |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2195 | ret = ocfs2_check_range_for_holes(inode, saved_pos, count); |
| 2196 | if (ret == 1) { |
| 2197 | *direct_io = 0; |
| 2198 | ret = 0; |
| 2199 | } else if (ret < 0) |
| 2200 | mlog_errno(ret); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2201 | break; |
| 2202 | } |
| 2203 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2204 | if (appending) |
| 2205 | *ppos = saved_pos; |
| 2206 | |
| 2207 | out_unlock: |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 2208 | trace_ocfs2_prepare_inode_for_write(OCFS2_I(inode)->ip_blkno, |
| 2209 | saved_pos, appending, count, |
| 2210 | direct_io, has_refcount); |
| 2211 | |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2212 | if (meta_level >= 0) |
| 2213 | ocfs2_inode_unlock(inode, meta_level); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2214 | |
| 2215 | out: |
| 2216 | return ret; |
| 2217 | } |
| 2218 | |
| 2219 | static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, |
| 2220 | const struct iovec *iov, |
| 2221 | unsigned long nr_segs, |
| 2222 | loff_t pos) |
| 2223 | { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2224 | int ret, direct_io, appending, rw_level, have_alloc_sem = 0; |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2225 | int can_do_direct, has_refcount = 0; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2226 | ssize_t written = 0; |
| 2227 | size_t ocount; /* original count */ |
| 2228 | size_t count; /* after file limit checks */ |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2229 | loff_t old_size, *ppos = &iocb->ki_pos; |
| 2230 | u32 old_clusters; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2231 | struct file *file = iocb->ki_filp; |
| 2232 | struct inode *inode = file->f_path.dentry->d_inode; |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2233 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Tristan Ye | 7bdb0d1 | 2010-10-11 16:46:39 +0800 | [diff] [blame] | 2234 | int full_coherency = !(osb->s_mount_opt & |
| 2235 | OCFS2_MOUNT_COHERENCY_BUFFERED); |
Mark Fasheh | a11f7e6 | 2011-06-22 14:23:38 -0700 | [diff] [blame^] | 2236 | int unaligned_dio = 0; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2237 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 2238 | trace_ocfs2_file_aio_write(inode, file, file->f_path.dentry, |
| 2239 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 2240 | file->f_path.dentry->d_name.len, |
| 2241 | file->f_path.dentry->d_name.name, |
| 2242 | (unsigned int)nr_segs); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2243 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2244 | if (iocb->ki_left == 0) |
| 2245 | return 0; |
| 2246 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2247 | vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); |
| 2248 | |
| 2249 | appending = file->f_flags & O_APPEND ? 1 : 0; |
| 2250 | direct_io = file->f_flags & O_DIRECT ? 1 : 0; |
| 2251 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2252 | mutex_lock(&inode->i_mutex); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2253 | |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2254 | ocfs2_iocb_clear_sem_locked(iocb); |
| 2255 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2256 | relock: |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2257 | /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */ |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2258 | if (direct_io) { |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2259 | down_read(&inode->i_alloc_sem); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2260 | have_alloc_sem = 1; |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2261 | /* communicate with ocfs2_dio_end_io */ |
| 2262 | ocfs2_iocb_set_sem_locked(iocb); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2263 | } |
| 2264 | |
Tristan Ye | 7bdb0d1 | 2010-10-11 16:46:39 +0800 | [diff] [blame] | 2265 | /* |
| 2266 | * Concurrent O_DIRECT writes are allowed with |
| 2267 | * mount_option "coherency=buffered". |
| 2268 | */ |
| 2269 | rw_level = (!direct_io || full_coherency); |
| 2270 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2271 | ret = ocfs2_rw_lock(inode, rw_level); |
| 2272 | if (ret < 0) { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2273 | mlog_errno(ret); |
| 2274 | goto out_sems; |
| 2275 | } |
| 2276 | |
Tristan Ye | 7bdb0d1 | 2010-10-11 16:46:39 +0800 | [diff] [blame] | 2277 | /* |
| 2278 | * O_DIRECT writes with "coherency=full" need to take EX cluster |
| 2279 | * inode_lock to guarantee coherency. |
| 2280 | */ |
| 2281 | if (direct_io && full_coherency) { |
| 2282 | /* |
| 2283 | * We need to take and drop the inode lock to force |
| 2284 | * other nodes to drop their caches. Buffered I/O |
| 2285 | * already does this in write_begin(). |
| 2286 | */ |
| 2287 | ret = ocfs2_inode_lock(inode, NULL, 1); |
| 2288 | if (ret < 0) { |
| 2289 | mlog_errno(ret); |
| 2290 | goto out_sems; |
| 2291 | } |
| 2292 | |
| 2293 | ocfs2_inode_unlock(inode, 1); |
| 2294 | } |
| 2295 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2296 | can_do_direct = direct_io; |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2297 | ret = ocfs2_prepare_inode_for_write(file, ppos, |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2298 | iocb->ki_left, appending, |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2299 | &can_do_direct, &has_refcount); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2300 | if (ret < 0) { |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2301 | mlog_errno(ret); |
| 2302 | goto out; |
| 2303 | } |
| 2304 | |
Mark Fasheh | a11f7e6 | 2011-06-22 14:23:38 -0700 | [diff] [blame^] | 2305 | if (direct_io && !is_sync_kiocb(iocb)) |
| 2306 | unaligned_dio = ocfs2_is_io_unaligned(inode, iocb->ki_left, |
| 2307 | *ppos); |
| 2308 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2309 | /* |
| 2310 | * We can't complete the direct I/O as requested, fall back to |
| 2311 | * buffered I/O. |
| 2312 | */ |
| 2313 | if (direct_io && !can_do_direct) { |
| 2314 | ocfs2_rw_unlock(inode, rw_level); |
| 2315 | up_read(&inode->i_alloc_sem); |
| 2316 | |
| 2317 | have_alloc_sem = 0; |
| 2318 | rw_level = -1; |
| 2319 | |
| 2320 | direct_io = 0; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2321 | goto relock; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2322 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2323 | |
Mark Fasheh | a11f7e6 | 2011-06-22 14:23:38 -0700 | [diff] [blame^] | 2324 | if (unaligned_dio) { |
| 2325 | /* |
| 2326 | * Wait on previous unaligned aio to complete before |
| 2327 | * proceeding. |
| 2328 | */ |
| 2329 | ocfs2_aiodio_wait(inode); |
| 2330 | |
| 2331 | /* Mark the iocb as needing a decrement in ocfs2_dio_end_io */ |
| 2332 | atomic_inc(&OCFS2_I(inode)->ip_unaligned_aio); |
| 2333 | ocfs2_iocb_set_unaligned_aio(iocb); |
| 2334 | } |
| 2335 | |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2336 | /* |
| 2337 | * To later detect whether a journal commit for sync writes is |
| 2338 | * necessary, we sample i_size, and cluster count here. |
| 2339 | */ |
| 2340 | old_size = i_size_read(inode); |
| 2341 | old_clusters = OCFS2_I(inode)->ip_clusters; |
| 2342 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2343 | /* communicate with ocfs2_dio_end_io */ |
Mark Fasheh | 7cdfc3a | 2007-04-16 17:28:51 -0700 | [diff] [blame] | 2344 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2345 | |
Li Dongyang | 6b933c8 | 2010-04-17 17:49:10 +0800 | [diff] [blame] | 2346 | ret = generic_segment_checks(iov, &nr_segs, &ocount, |
| 2347 | VERIFY_READ); |
| 2348 | if (ret) |
| 2349 | goto out_dio; |
| 2350 | |
| 2351 | count = ocount; |
| 2352 | ret = generic_write_checks(file, ppos, &count, |
| 2353 | S_ISBLK(inode->i_mode)); |
| 2354 | if (ret) |
| 2355 | goto out_dio; |
| 2356 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2357 | if (direct_io) { |
| 2358 | written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos, |
| 2359 | ppos, count, ocount); |
| 2360 | if (written < 0) { |
| 2361 | ret = written; |
| 2362 | goto out_dio; |
| 2363 | } |
| 2364 | } else { |
Li Dongyang | 6b933c8 | 2010-04-17 17:49:10 +0800 | [diff] [blame] | 2365 | current->backing_dev_info = file->f_mapping->backing_dev_info; |
| 2366 | written = generic_file_buffered_write(iocb, iov, nr_segs, *ppos, |
| 2367 | ppos, count, 0); |
| 2368 | current->backing_dev_info = NULL; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2369 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2370 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2371 | out_dio: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2372 | /* buffered aio wouldn't have proper lock coverage today */ |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2373 | BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2374 | |
Tao Ma | 60c4867 | 2010-02-03 09:56:04 +0800 | [diff] [blame] | 2375 | if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) || |
Tristan Ye | 81c8c82 | 2010-08-19 15:15:00 +0800 | [diff] [blame] | 2376 | ((file->f_flags & O_DIRECT) && !direct_io)) { |
Jan Kara | 918941a | 2009-08-17 18:50:08 +0200 | [diff] [blame] | 2377 | ret = filemap_fdatawrite_range(file->f_mapping, pos, |
| 2378 | pos + count - 1); |
| 2379 | if (ret < 0) |
| 2380 | written = ret; |
| 2381 | |
Coly Li | a03ab78 | 2010-03-26 05:15:12 +0800 | [diff] [blame] | 2382 | if (!ret && ((old_size != i_size_read(inode)) || |
| 2383 | (old_clusters != OCFS2_I(inode)->ip_clusters) || |
| 2384 | has_refcount)) { |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 2385 | ret = jbd2_journal_force_commit(osb->journal->j_journal); |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2386 | if (ret < 0) |
| 2387 | written = ret; |
| 2388 | } |
Jan Kara | 918941a | 2009-08-17 18:50:08 +0200 | [diff] [blame] | 2389 | |
| 2390 | if (!ret) |
| 2391 | ret = filemap_fdatawait_range(file->f_mapping, pos, |
| 2392 | pos + count - 1); |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2393 | } |
| 2394 | |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2395 | /* |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2396 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io |
| 2397 | * function pointer which is called when o_direct io completes so that |
| 2398 | * it can unlock our rw lock. (it's the clustered equivalent of |
| 2399 | * i_alloc_sem; protects truncate from racing with pending ios). |
| 2400 | * Unfortunately there are error cases which call end_io and others |
| 2401 | * that don't. so we don't have to unlock the rw_lock if either an |
| 2402 | * async dio is going to do it in the future or an end_io after an |
| 2403 | * error has already done it. |
| 2404 | */ |
Coly Li | 66b116c | 2010-02-25 14:57:13 +0800 | [diff] [blame] | 2405 | if ((ret == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2406 | rw_level = -1; |
| 2407 | have_alloc_sem = 0; |
Mark Fasheh | a11f7e6 | 2011-06-22 14:23:38 -0700 | [diff] [blame^] | 2408 | unaligned_dio = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2409 | } |
| 2410 | |
Mark Fasheh | a11f7e6 | 2011-06-22 14:23:38 -0700 | [diff] [blame^] | 2411 | if (unaligned_dio) |
| 2412 | atomic_dec(&OCFS2_I(inode)->ip_unaligned_aio); |
| 2413 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2414 | out: |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2415 | if (rw_level != -1) |
| 2416 | ocfs2_rw_unlock(inode, rw_level); |
| 2417 | |
| 2418 | out_sems: |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2419 | if (have_alloc_sem) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2420 | up_read(&inode->i_alloc_sem); |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2421 | ocfs2_iocb_clear_sem_locked(iocb); |
| 2422 | } |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2423 | |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 2424 | mutex_unlock(&inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2425 | |
Wengang Wang | 812e7a6 | 2009-07-10 13:26:04 +0800 | [diff] [blame] | 2426 | if (written) |
| 2427 | ret = written; |
Wengang Wang | 812e7a6 | 2009-07-10 13:26:04 +0800 | [diff] [blame] | 2428 | return ret; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2429 | } |
| 2430 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2431 | static int ocfs2_splice_to_file(struct pipe_inode_info *pipe, |
| 2432 | struct file *out, |
| 2433 | struct splice_desc *sd) |
| 2434 | { |
| 2435 | int ret; |
| 2436 | |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2437 | ret = ocfs2_prepare_inode_for_write(out, &sd->pos, |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2438 | sd->total_len, 0, NULL, NULL); |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2439 | if (ret < 0) { |
| 2440 | mlog_errno(ret); |
| 2441 | return ret; |
| 2442 | } |
| 2443 | |
| 2444 | return splice_from_pipe_feed(pipe, sd, pipe_to_file); |
| 2445 | } |
| 2446 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2447 | static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, |
| 2448 | struct file *out, |
| 2449 | loff_t *ppos, |
| 2450 | size_t len, |
| 2451 | unsigned int flags) |
| 2452 | { |
| 2453 | int ret; |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2454 | struct address_space *mapping = out->f_mapping; |
| 2455 | struct inode *inode = mapping->host; |
| 2456 | struct splice_desc sd = { |
| 2457 | .total_len = len, |
| 2458 | .flags = flags, |
| 2459 | .pos = *ppos, |
| 2460 | .u.file = out, |
| 2461 | }; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2462 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 2463 | |
| 2464 | trace_ocfs2_file_splice_write(inode, out, out->f_path.dentry, |
| 2465 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 2466 | out->f_path.dentry->d_name.len, |
| 2467 | out->f_path.dentry->d_name.name, len); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2468 | |
Miklos Szeredi | 7bfac9e | 2009-04-06 17:41:00 +0200 | [diff] [blame] | 2469 | if (pipe->inode) |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2470 | mutex_lock_nested(&pipe->inode->i_mutex, I_MUTEX_PARENT); |
| 2471 | |
| 2472 | splice_from_pipe_begin(&sd); |
| 2473 | do { |
| 2474 | ret = splice_from_pipe_next(pipe, &sd); |
| 2475 | if (ret <= 0) |
| 2476 | break; |
| 2477 | |
| 2478 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); |
| 2479 | ret = ocfs2_rw_lock(inode, 1); |
| 2480 | if (ret < 0) |
| 2481 | mlog_errno(ret); |
| 2482 | else { |
| 2483 | ret = ocfs2_splice_to_file(pipe, out, &sd); |
| 2484 | ocfs2_rw_unlock(inode, 1); |
| 2485 | } |
| 2486 | mutex_unlock(&inode->i_mutex); |
| 2487 | } while (ret > 0); |
| 2488 | splice_from_pipe_end(pipe, &sd); |
| 2489 | |
Miklos Szeredi | 7bfac9e | 2009-04-06 17:41:00 +0200 | [diff] [blame] | 2490 | if (pipe->inode) |
| 2491 | mutex_unlock(&pipe->inode->i_mutex); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2492 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2493 | if (sd.num_spliced) |
| 2494 | ret = sd.num_spliced; |
| 2495 | |
| 2496 | if (ret > 0) { |
| 2497 | unsigned long nr_pages; |
Jan Kara | d23c937 | 2009-08-18 18:24:31 +0200 | [diff] [blame] | 2498 | int err; |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2499 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2500 | nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
| 2501 | |
Jan Kara | d23c937 | 2009-08-18 18:24:31 +0200 | [diff] [blame] | 2502 | err = generic_write_sync(out, *ppos, ret); |
| 2503 | if (err) |
| 2504 | ret = err; |
| 2505 | else |
| 2506 | *ppos += ret; |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2507 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2508 | balance_dirty_pages_ratelimited_nr(mapping, nr_pages); |
| 2509 | } |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2510 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2511 | return ret; |
| 2512 | } |
| 2513 | |
| 2514 | static ssize_t ocfs2_file_splice_read(struct file *in, |
| 2515 | loff_t *ppos, |
| 2516 | struct pipe_inode_info *pipe, |
| 2517 | size_t len, |
| 2518 | unsigned int flags) |
| 2519 | { |
Tao Ma | 1962f39 | 2009-06-19 15:36:52 +0800 | [diff] [blame] | 2520 | int ret = 0, lock_level = 0; |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2521 | struct inode *inode = in->f_path.dentry->d_inode; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2522 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 2523 | trace_ocfs2_file_splice_read(inode, in, in->f_path.dentry, |
| 2524 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 2525 | in->f_path.dentry->d_name.len, |
| 2526 | in->f_path.dentry->d_name.name, len); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2527 | |
| 2528 | /* |
| 2529 | * See the comment in ocfs2_file_aio_read() |
| 2530 | */ |
Tao Ma | 1962f39 | 2009-06-19 15:36:52 +0800 | [diff] [blame] | 2531 | ret = ocfs2_inode_lock_atime(inode, in->f_vfsmnt, &lock_level); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2532 | if (ret < 0) { |
| 2533 | mlog_errno(ret); |
| 2534 | goto bail; |
| 2535 | } |
Tao Ma | 1962f39 | 2009-06-19 15:36:52 +0800 | [diff] [blame] | 2536 | ocfs2_inode_unlock(inode, lock_level); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2537 | |
| 2538 | ret = generic_file_splice_read(in, ppos, pipe, len, flags); |
| 2539 | |
| 2540 | bail: |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2541 | return ret; |
| 2542 | } |
| 2543 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2544 | static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 2545 | const struct iovec *iov, |
| 2546 | unsigned long nr_segs, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2547 | loff_t pos) |
| 2548 | { |
Tiger Yang | 25899de | 2006-11-15 15:49:02 +0800 | [diff] [blame] | 2549 | int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2550 | struct file *filp = iocb->ki_filp; |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2551 | struct inode *inode = filp->f_path.dentry->d_inode; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2552 | |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 2553 | trace_ocfs2_file_aio_read(inode, filp, filp->f_path.dentry, |
| 2554 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 2555 | filp->f_path.dentry->d_name.len, |
| 2556 | filp->f_path.dentry->d_name.name, nr_segs); |
| 2557 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2558 | |
| 2559 | if (!inode) { |
| 2560 | ret = -EINVAL; |
| 2561 | mlog_errno(ret); |
| 2562 | goto bail; |
| 2563 | } |
| 2564 | |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2565 | ocfs2_iocb_clear_sem_locked(iocb); |
| 2566 | |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2567 | /* |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2568 | * buffered reads protect themselves in ->readpage(). O_DIRECT reads |
| 2569 | * need locks to protect pending reads from racing with truncate. |
| 2570 | */ |
| 2571 | if (filp->f_flags & O_DIRECT) { |
| 2572 | down_read(&inode->i_alloc_sem); |
| 2573 | have_alloc_sem = 1; |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2574 | ocfs2_iocb_set_sem_locked(iocb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2575 | |
| 2576 | ret = ocfs2_rw_lock(inode, 0); |
| 2577 | if (ret < 0) { |
| 2578 | mlog_errno(ret); |
| 2579 | goto bail; |
| 2580 | } |
| 2581 | rw_level = 0; |
| 2582 | /* communicate with ocfs2_dio_end_io */ |
Mark Fasheh | 7cdfc3a | 2007-04-16 17:28:51 -0700 | [diff] [blame] | 2583 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2584 | } |
| 2585 | |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2586 | /* |
| 2587 | * We're fine letting folks race truncates and extending |
| 2588 | * writes with read across the cluster, just like they can |
| 2589 | * locally. Hence no rw_lock during read. |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2590 | * |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2591 | * Take and drop the meta data lock to update inode fields |
| 2592 | * like i_size. This allows the checks down below |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2593 | * generic_file_aio_read() a chance of actually working. |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2594 | */ |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 2595 | ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level); |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2596 | if (ret < 0) { |
| 2597 | mlog_errno(ret); |
| 2598 | goto bail; |
| 2599 | } |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 2600 | ocfs2_inode_unlock(inode, lock_level); |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2601 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 2602 | ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos); |
Tao Ma | 468eedd | 2011-02-22 22:14:41 +0800 | [diff] [blame] | 2603 | trace_generic_file_aio_read_ret(ret); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2604 | |
| 2605 | /* buffered aio wouldn't have proper lock coverage today */ |
| 2606 | BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT)); |
| 2607 | |
| 2608 | /* see ocfs2_file_aio_write */ |
| 2609 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { |
| 2610 | rw_level = -1; |
| 2611 | have_alloc_sem = 0; |
| 2612 | } |
| 2613 | |
| 2614 | bail: |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2615 | if (have_alloc_sem) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2616 | up_read(&inode->i_alloc_sem); |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2617 | ocfs2_iocb_clear_sem_locked(iocb); |
| 2618 | } |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2619 | if (rw_level != -1) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2620 | ocfs2_rw_unlock(inode, rw_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2621 | |
| 2622 | return ret; |
| 2623 | } |
| 2624 | |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 2625 | const struct inode_operations ocfs2_file_iops = { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2626 | .setattr = ocfs2_setattr, |
| 2627 | .getattr = ocfs2_getattr, |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 2628 | .permission = ocfs2_permission, |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2629 | .setxattr = generic_setxattr, |
| 2630 | .getxattr = generic_getxattr, |
| 2631 | .listxattr = ocfs2_listxattr, |
| 2632 | .removexattr = generic_removexattr, |
Mark Fasheh | 00dc417 | 2008-10-03 17:32:11 -0400 | [diff] [blame] | 2633 | .fiemap = ocfs2_fiemap, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2634 | }; |
| 2635 | |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 2636 | const struct inode_operations ocfs2_special_file_iops = { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2637 | .setattr = ocfs2_setattr, |
| 2638 | .getattr = ocfs2_getattr, |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 2639 | .permission = ocfs2_permission, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2640 | }; |
| 2641 | |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2642 | /* |
| 2643 | * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with |
| 2644 | * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks! |
| 2645 | */ |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 2646 | const struct file_operations ocfs2_fops = { |
Jan Kara | 32c3c0e | 2007-12-19 15:24:52 +0100 | [diff] [blame] | 2647 | .llseek = generic_file_llseek, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2648 | .read = do_sync_read, |
| 2649 | .write = do_sync_write, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2650 | .mmap = ocfs2_mmap, |
| 2651 | .fsync = ocfs2_sync_file, |
| 2652 | .release = ocfs2_file_release, |
| 2653 | .open = ocfs2_file_open, |
| 2654 | .aio_read = ocfs2_file_aio_read, |
| 2655 | .aio_write = ocfs2_file_aio_write, |
Andi Kleen | c9ec148 | 2008-01-27 03:17:17 +0100 | [diff] [blame] | 2656 | .unlocked_ioctl = ocfs2_ioctl, |
Mark Fasheh | 586d232 | 2007-03-09 15:56:28 -0800 | [diff] [blame] | 2657 | #ifdef CONFIG_COMPAT |
| 2658 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2659 | #endif |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2660 | .lock = ocfs2_lock, |
| 2661 | .flock = ocfs2_flock, |
| 2662 | .splice_read = ocfs2_file_splice_read, |
| 2663 | .splice_write = ocfs2_file_splice_write, |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 2664 | .fallocate = ocfs2_fallocate, |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2665 | }; |
| 2666 | |
| 2667 | const struct file_operations ocfs2_dops = { |
| 2668 | .llseek = generic_file_llseek, |
| 2669 | .read = generic_read_dir, |
| 2670 | .readdir = ocfs2_readdir, |
| 2671 | .fsync = ocfs2_sync_file, |
| 2672 | .release = ocfs2_dir_release, |
| 2673 | .open = ocfs2_dir_open, |
| 2674 | .unlocked_ioctl = ocfs2_ioctl, |
| 2675 | #ifdef CONFIG_COMPAT |
| 2676 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2677 | #endif |
| 2678 | .lock = ocfs2_lock, |
| 2679 | .flock = ocfs2_flock, |
| 2680 | }; |
| 2681 | |
| 2682 | /* |
| 2683 | * POSIX-lockless variants of our file_operations. |
| 2684 | * |
| 2685 | * These will be used if the underlying cluster stack does not support |
| 2686 | * posix file locking, if the user passes the "localflocks" mount |
| 2687 | * option, or if we have a local-only fs. |
| 2688 | * |
| 2689 | * ocfs2_flock is in here because all stacks handle UNIX file locks, |
| 2690 | * so we still want it in the case of no stack support for |
| 2691 | * plocks. Internally, it will do the right thing when asked to ignore |
| 2692 | * the cluster. |
| 2693 | */ |
| 2694 | const struct file_operations ocfs2_fops_no_plocks = { |
| 2695 | .llseek = generic_file_llseek, |
| 2696 | .read = do_sync_read, |
| 2697 | .write = do_sync_write, |
| 2698 | .mmap = ocfs2_mmap, |
| 2699 | .fsync = ocfs2_sync_file, |
| 2700 | .release = ocfs2_file_release, |
| 2701 | .open = ocfs2_file_open, |
| 2702 | .aio_read = ocfs2_file_aio_read, |
| 2703 | .aio_write = ocfs2_file_aio_write, |
| 2704 | .unlocked_ioctl = ocfs2_ioctl, |
| 2705 | #ifdef CONFIG_COMPAT |
| 2706 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2707 | #endif |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 2708 | .flock = ocfs2_flock, |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2709 | .splice_read = ocfs2_file_splice_read, |
| 2710 | .splice_write = ocfs2_file_splice_write, |
Tristan Ye | 3d1c182 | 2011-05-23 15:57:26 +0800 | [diff] [blame] | 2711 | .fallocate = ocfs2_fallocate, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2712 | }; |
| 2713 | |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2714 | const struct file_operations ocfs2_dops_no_plocks = { |
Jan Kara | 32c3c0e | 2007-12-19 15:24:52 +0100 | [diff] [blame] | 2715 | .llseek = generic_file_llseek, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2716 | .read = generic_read_dir, |
| 2717 | .readdir = ocfs2_readdir, |
| 2718 | .fsync = ocfs2_sync_file, |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 2719 | .release = ocfs2_dir_release, |
| 2720 | .open = ocfs2_dir_open, |
Andi Kleen | c9ec148 | 2008-01-27 03:17:17 +0100 | [diff] [blame] | 2721 | .unlocked_ioctl = ocfs2_ioctl, |
Mark Fasheh | 586d232 | 2007-03-09 15:56:28 -0800 | [diff] [blame] | 2722 | #ifdef CONFIG_COMPAT |
| 2723 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2724 | #endif |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 2725 | .flock = ocfs2_flock, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2726 | }; |