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 | |
| 41 | #define MLOG_MASK_PREFIX ML_INODE |
| 42 | #include <cluster/masklog.h> |
| 43 | |
| 44 | #include "ocfs2.h" |
| 45 | |
| 46 | #include "alloc.h" |
| 47 | #include "aops.h" |
| 48 | #include "dir.h" |
| 49 | #include "dlmglue.h" |
| 50 | #include "extent_map.h" |
| 51 | #include "file.h" |
| 52 | #include "sysfile.h" |
| 53 | #include "inode.h" |
Herbert Poetzl | ca4d147 | 2006-07-03 17:27:12 -0700 | [diff] [blame] | 54 | #include "ioctl.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 55 | #include "journal.h" |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 56 | #include "locks.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 57 | #include "mmap.h" |
| 58 | #include "suballoc.h" |
| 59 | #include "super.h" |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 60 | #include "xattr.h" |
Tiger Yang | 23fc270 | 2008-11-14 11:17:18 +0800 | [diff] [blame] | 61 | #include "acl.h" |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 62 | #include "quota.h" |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 63 | #include "refcounttree.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 | ef6b689 | 2011-02-21 11:10:44 +0800 | [diff] [blame] | 102 | mlog(0, "(0x%p, 0x%p, '%.*s')\n", inode, file, |
| 103 | file->f_path.dentry->d_name.len, file->f_path.dentry->d_name.name); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 104 | |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 105 | if (file->f_mode & FMODE_WRITE) |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 106 | dquot_initialize(inode); |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 107 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 108 | spin_lock(&oi->ip_lock); |
| 109 | |
| 110 | /* Check that the inode hasn't been wiped from disk by another |
| 111 | * node. If it hasn't then we're safe as long as we hold the |
| 112 | * spin lock until our increment of open count. */ |
| 113 | if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { |
| 114 | spin_unlock(&oi->ip_lock); |
| 115 | |
| 116 | status = -ENOENT; |
| 117 | goto leave; |
| 118 | } |
| 119 | |
| 120 | if (mode & O_DIRECT) |
| 121 | oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT; |
| 122 | |
| 123 | oi->ip_open_count++; |
| 124 | spin_unlock(&oi->ip_lock); |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 125 | |
| 126 | status = ocfs2_init_file_private(inode, file); |
| 127 | if (status) { |
| 128 | /* |
| 129 | * We want to set open count back if we're failing the |
| 130 | * open. |
| 131 | */ |
| 132 | spin_lock(&oi->ip_lock); |
| 133 | oi->ip_open_count--; |
| 134 | spin_unlock(&oi->ip_lock); |
| 135 | } |
| 136 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 137 | leave: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 138 | return status; |
| 139 | } |
| 140 | |
| 141 | static int ocfs2_file_release(struct inode *inode, struct file *file) |
| 142 | { |
| 143 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 144 | |
Tao Ma | ef6b689 | 2011-02-21 11:10:44 +0800 | [diff] [blame] | 145 | mlog(0, "(0x%p, 0x%p, '%.*s')\n", inode, file, |
| 146 | file->f_path.dentry->d_name.len, |
| 147 | file->f_path.dentry->d_name.name); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 148 | |
| 149 | spin_lock(&oi->ip_lock); |
| 150 | if (!--oi->ip_open_count) |
| 151 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; |
| 152 | spin_unlock(&oi->ip_lock); |
| 153 | |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 154 | ocfs2_free_file_private(inode, file); |
| 155 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 156 | return 0; |
| 157 | } |
| 158 | |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 159 | static int ocfs2_dir_open(struct inode *inode, struct file *file) |
| 160 | { |
| 161 | return ocfs2_init_file_private(inode, file); |
| 162 | } |
| 163 | |
| 164 | static int ocfs2_dir_release(struct inode *inode, struct file *file) |
| 165 | { |
| 166 | ocfs2_free_file_private(inode, file); |
| 167 | return 0; |
| 168 | } |
| 169 | |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame] | 170 | static int ocfs2_sync_file(struct file *file, int datasync) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 171 | { |
| 172 | int err = 0; |
| 173 | journal_t *journal; |
Christoph Hellwig | 7ea8085 | 2010-05-26 17:53:25 +0200 | [diff] [blame] | 174 | struct inode *inode = file->f_mapping->host; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 175 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 176 | |
Tao Ma | ef6b689 | 2011-02-21 11:10:44 +0800 | [diff] [blame] | 177 | mlog(0, "(0x%p, %d, 0x%p, '%.*s')\n", file, datasync, |
| 178 | file->f_path.dentry, file->f_path.dentry->d_name.len, |
| 179 | file->f_path.dentry->d_name.name); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 180 | |
Jan Kara | 04eda1a | 2010-08-05 20:32:45 +0200 | [diff] [blame] | 181 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) { |
| 182 | /* |
| 183 | * We still have to flush drive's caches to get data to the |
| 184 | * platter |
| 185 | */ |
| 186 | if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER) |
Linus Torvalds | f8cae0f | 2010-10-22 19:30:38 -0700 | [diff] [blame] | 187 | blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); |
Hisashi Hifumi | e04cc15 | 2009-06-09 16:47:45 +0900 | [diff] [blame] | 188 | goto bail; |
Jan Kara | 04eda1a | 2010-08-05 20:32:45 +0200 | [diff] [blame] | 189 | } |
Hisashi Hifumi | e04cc15 | 2009-06-09 16:47:45 +0900 | [diff] [blame] | 190 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 191 | journal = osb->journal->j_journal; |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 192 | err = jbd2_journal_force_commit(journal); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 193 | |
| 194 | bail: |
Tao Ma | c1e8d35 | 2011-03-07 16:43:21 +0800 | [diff] [blame^] | 195 | if (err) |
| 196 | mlog_errno(err); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 197 | |
| 198 | return (err < 0) ? -EIO : 0; |
| 199 | } |
| 200 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 201 | int ocfs2_should_update_atime(struct inode *inode, |
| 202 | struct vfsmount *vfsmnt) |
| 203 | { |
| 204 | struct timespec now; |
| 205 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 206 | |
| 207 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
| 208 | return 0; |
| 209 | |
| 210 | if ((inode->i_flags & S_NOATIME) || |
| 211 | ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))) |
| 212 | return 0; |
| 213 | |
Mark Fasheh | 6c2aad0 | 2006-12-19 15:25:52 -0800 | [diff] [blame] | 214 | /* |
| 215 | * We can be called with no vfsmnt structure - NFSD will |
| 216 | * sometimes do this. |
| 217 | * |
| 218 | * Note that our action here is different than touch_atime() - |
| 219 | * if we can't tell whether this is a noatime mount, then we |
| 220 | * don't know whether to trust the value of s_atime_quantum. |
| 221 | */ |
| 222 | if (vfsmnt == NULL) |
| 223 | return 0; |
| 224 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 225 | if ((vfsmnt->mnt_flags & MNT_NOATIME) || |
| 226 | ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
| 227 | return 0; |
| 228 | |
Mark Fasheh | 7e913c5 | 2006-12-13 00:34:35 -0800 | [diff] [blame] | 229 | if (vfsmnt->mnt_flags & MNT_RELATIME) { |
| 230 | if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) || |
| 231 | (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0)) |
| 232 | return 1; |
| 233 | |
| 234 | return 0; |
| 235 | } |
| 236 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 237 | now = CURRENT_TIME; |
| 238 | if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum)) |
| 239 | return 0; |
| 240 | else |
| 241 | return 1; |
| 242 | } |
| 243 | |
| 244 | int ocfs2_update_inode_atime(struct inode *inode, |
| 245 | struct buffer_head *bh) |
| 246 | { |
| 247 | int ret; |
| 248 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 249 | handle_t *handle; |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 250 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data; |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 251 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 252 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 253 | if (IS_ERR(handle)) { |
| 254 | ret = PTR_ERR(handle); |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 255 | mlog_errno(ret); |
| 256 | goto out; |
| 257 | } |
| 258 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 259 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 260 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 261 | if (ret) { |
| 262 | mlog_errno(ret); |
| 263 | goto out_commit; |
| 264 | } |
| 265 | |
| 266 | /* |
| 267 | * Don't use ocfs2_mark_inode_dirty() here as we don't always |
| 268 | * have i_mutex to guard against concurrent changes to other |
| 269 | * inode fields. |
| 270 | */ |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 271 | inode->i_atime = CURRENT_TIME; |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 272 | di->i_atime = cpu_to_le64(inode->i_atime.tv_sec); |
| 273 | di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 274 | ocfs2_journal_dirty(handle, bh); |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 275 | |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 276 | out_commit: |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 277 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
| 278 | out: |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 279 | return ret; |
| 280 | } |
| 281 | |
Adrian Bunk | 6cb129f | 2007-04-26 00:29:35 -0700 | [diff] [blame] | 282 | static int ocfs2_set_inode_size(handle_t *handle, |
| 283 | struct inode *inode, |
| 284 | struct buffer_head *fe_bh, |
| 285 | u64 new_i_size) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 286 | { |
| 287 | int status; |
| 288 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 289 | i_size_write(inode, new_i_size); |
Mark Fasheh | 8110b07 | 2007-03-22 16:53:23 -0700 | [diff] [blame] | 290 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 291 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 292 | |
| 293 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); |
| 294 | if (status < 0) { |
| 295 | mlog_errno(status); |
| 296 | goto bail; |
| 297 | } |
| 298 | |
| 299 | bail: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 300 | return status; |
| 301 | } |
| 302 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 303 | int ocfs2_simple_size_update(struct inode *inode, |
| 304 | struct buffer_head *di_bh, |
| 305 | u64 new_i_size) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 306 | { |
| 307 | int ret; |
| 308 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 309 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 310 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 311 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 312 | if (IS_ERR(handle)) { |
| 313 | ret = PTR_ERR(handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 314 | mlog_errno(ret); |
| 315 | goto out; |
| 316 | } |
| 317 | |
| 318 | ret = ocfs2_set_inode_size(handle, inode, di_bh, |
| 319 | new_i_size); |
| 320 | if (ret < 0) |
| 321 | mlog_errno(ret); |
| 322 | |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 323 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 324 | out: |
| 325 | return ret; |
| 326 | } |
| 327 | |
Tao Ma | 37f8a2b | 2009-08-26 09:47:28 +0800 | [diff] [blame] | 328 | static int ocfs2_cow_file_pos(struct inode *inode, |
| 329 | struct buffer_head *fe_bh, |
| 330 | u64 offset) |
| 331 | { |
| 332 | int status; |
| 333 | u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 334 | unsigned int num_clusters = 0; |
| 335 | unsigned int ext_flags = 0; |
| 336 | |
| 337 | /* |
| 338 | * If the new offset is aligned to the range of the cluster, there is |
| 339 | * no space for ocfs2_zero_range_for_truncate to fill, so no need to |
| 340 | * CoW either. |
| 341 | */ |
| 342 | if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0) |
| 343 | return 0; |
| 344 | |
| 345 | status = ocfs2_get_clusters(inode, cpos, &phys, |
| 346 | &num_clusters, &ext_flags); |
| 347 | if (status) { |
| 348 | mlog_errno(status); |
| 349 | goto out; |
| 350 | } |
| 351 | |
| 352 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) |
| 353 | goto out; |
| 354 | |
Tao Ma | 1550271 | 2010-08-12 10:36:38 +0800 | [diff] [blame] | 355 | return ocfs2_refcount_cow(inode, NULL, fe_bh, cpos, 1, cpos+1); |
Tao Ma | 37f8a2b | 2009-08-26 09:47:28 +0800 | [diff] [blame] | 356 | |
| 357 | out: |
| 358 | return status; |
| 359 | } |
| 360 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 361 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, |
| 362 | struct inode *inode, |
| 363 | struct buffer_head *fe_bh, |
| 364 | u64 new_i_size) |
| 365 | { |
| 366 | int status; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 367 | handle_t *handle; |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 368 | struct ocfs2_dinode *di; |
Mark Fasheh | 35edec1 | 2007-07-06 14:41:18 -0700 | [diff] [blame] | 369 | u64 cluster_bytes; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 370 | |
Tao Ma | 37f8a2b | 2009-08-26 09:47:28 +0800 | [diff] [blame] | 371 | /* |
| 372 | * We need to CoW the cluster contains the offset if it is reflinked |
| 373 | * since we will call ocfs2_zero_range_for_truncate later which will |
| 374 | * write "0" from offset to the end of the cluster. |
| 375 | */ |
| 376 | status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size); |
| 377 | if (status) { |
| 378 | mlog_errno(status); |
| 379 | return status; |
| 380 | } |
| 381 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 382 | /* TODO: This needs to actually orphan the inode in this |
| 383 | * transaction. */ |
| 384 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 385 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 386 | if (IS_ERR(handle)) { |
| 387 | status = PTR_ERR(handle); |
| 388 | mlog_errno(status); |
| 389 | goto out; |
| 390 | } |
| 391 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 392 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 393 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 394 | if (status < 0) { |
| 395 | mlog_errno(status); |
| 396 | goto out_commit; |
| 397 | } |
| 398 | |
| 399 | /* |
| 400 | * Do this before setting i_size. |
| 401 | */ |
Mark Fasheh | 35edec1 | 2007-07-06 14:41:18 -0700 | [diff] [blame] | 402 | cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size); |
| 403 | status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size, |
| 404 | cluster_bytes); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 405 | if (status) { |
| 406 | mlog_errno(status); |
| 407 | goto out_commit; |
| 408 | } |
| 409 | |
| 410 | i_size_write(inode, new_i_size); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 411 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 412 | |
| 413 | di = (struct ocfs2_dinode *) fe_bh->b_data; |
| 414 | di->i_size = cpu_to_le64(new_i_size); |
| 415 | di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec); |
| 416 | di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
| 417 | |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 418 | ocfs2_journal_dirty(handle, fe_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 419 | |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 420 | out_commit: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 421 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 422 | out: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 423 | return status; |
| 424 | } |
| 425 | |
| 426 | static int ocfs2_truncate_file(struct inode *inode, |
| 427 | struct buffer_head *di_bh, |
| 428 | u64 new_i_size) |
| 429 | { |
| 430 | int status = 0; |
| 431 | struct ocfs2_dinode *fe = NULL; |
| 432 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 433 | |
Tao Ma | ef6b689 | 2011-02-21 11:10:44 +0800 | [diff] [blame] | 434 | mlog(0, "(inode = %llu, new_i_size = %llu\n", |
| 435 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 436 | (unsigned long long)new_i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 437 | |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 438 | /* We trust di_bh because it comes from ocfs2_inode_lock(), which |
| 439 | * already validated it */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 440 | fe = (struct ocfs2_dinode *) di_bh->b_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 441 | |
| 442 | 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] | 443 | "Inode %llu, inode i_size = %lld != di " |
| 444 | "i_size = %llu, i_flags = 0x%x\n", |
| 445 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 446 | i_size_read(inode), |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 447 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 448 | le32_to_cpu(fe->i_flags)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 449 | |
| 450 | if (new_i_size > le64_to_cpu(fe->i_size)) { |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 451 | mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n", |
| 452 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 453 | (unsigned long long)new_i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 454 | status = -EINVAL; |
| 455 | mlog_errno(status); |
| 456 | goto bail; |
| 457 | } |
| 458 | |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 459 | mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n", |
| 460 | (unsigned long long)le64_to_cpu(fe->i_blkno), |
| 461 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 462 | (unsigned long long)new_i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 463 | |
| 464 | /* lets handle the simple truncate cases before doing any more |
| 465 | * cluster locking. */ |
| 466 | if (new_i_size == le64_to_cpu(fe->i_size)) |
| 467 | goto bail; |
| 468 | |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 469 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 470 | |
Mark Fasheh | 4fe370a | 2009-12-07 13:15:40 -0800 | [diff] [blame] | 471 | ocfs2_resv_discard(&osb->osb_la_resmap, |
| 472 | &OCFS2_I(inode)->ip_la_data_resv); |
| 473 | |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 474 | /* |
| 475 | * The inode lock forced other nodes to sync and drop their |
| 476 | * pages, which (correctly) happens even if we have a truncate |
| 477 | * without allocation change - ocfs2 cluster sizes can be much |
| 478 | * greater than page size, so we have to truncate them |
| 479 | * anyway. |
| 480 | */ |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 481 | unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); |
| 482 | truncate_inode_pages(inode->i_mapping, new_i_size); |
| 483 | |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 484 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 485 | status = ocfs2_truncate_inline(inode, di_bh, new_i_size, |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 486 | i_size_read(inode), 1); |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 487 | if (status) |
| 488 | mlog_errno(status); |
| 489 | |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 490 | goto bail_unlock_sem; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 491 | } |
| 492 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 493 | /* alright, we're going to need to do a full blown alloc size |
| 494 | * change. Orphan the inode so that recovery can complete the |
| 495 | * truncate if necessary. This does the task of marking |
| 496 | * i_size. */ |
| 497 | status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); |
| 498 | if (status < 0) { |
| 499 | mlog_errno(status); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 500 | goto bail_unlock_sem; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 501 | } |
| 502 | |
Tristan Ye | 78f9467 | 2010-05-11 17:54:42 +0800 | [diff] [blame] | 503 | status = ocfs2_commit_truncate(osb, inode, di_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 504 | if (status < 0) { |
| 505 | mlog_errno(status); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 506 | goto bail_unlock_sem; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 507 | } |
| 508 | |
| 509 | /* TODO: orphan dir cleanup here. */ |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 510 | bail_unlock_sem: |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 511 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 512 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 513 | bail: |
Tao Ma | 8b2c0db | 2009-08-18 11:43:49 +0800 | [diff] [blame] | 514 | if (!status && OCFS2_I(inode)->ip_clusters == 0) |
| 515 | status = ocfs2_try_remove_refcount_tree(inode, di_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 516 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 517 | return status; |
| 518 | } |
| 519 | |
| 520 | /* |
Tao Ma | 0eb8d47 | 2008-08-18 17:38:45 +0800 | [diff] [blame] | 521 | * extend file allocation only here. |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 522 | * we'll update all the disk stuff, and oip->alloc_size |
| 523 | * |
| 524 | * expect stuff to be locked, a transaction started and enough data / |
| 525 | * metadata reservations in the contexts. |
| 526 | * |
| 527 | * Will return -EAGAIN, and a reason if a restart is needed. |
| 528 | * If passed in, *reason will always be set, even in error. |
| 529 | */ |
Tao Ma | 0eb8d47 | 2008-08-18 17:38:45 +0800 | [diff] [blame] | 530 | int ocfs2_add_inode_data(struct ocfs2_super *osb, |
| 531 | struct inode *inode, |
| 532 | u32 *logical_offset, |
| 533 | u32 clusters_to_add, |
| 534 | int mark_unwritten, |
| 535 | struct buffer_head *fe_bh, |
| 536 | handle_t *handle, |
| 537 | struct ocfs2_alloc_context *data_ac, |
| 538 | struct ocfs2_alloc_context *meta_ac, |
| 539 | enum ocfs2_alloc_restarted *reason_ret) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 540 | { |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 541 | int ret; |
| 542 | struct ocfs2_extent_tree et; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 543 | |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 544 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh); |
Joel Becker | cbee7e1 | 2009-02-13 03:34:15 -0800 | [diff] [blame] | 545 | ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset, |
| 546 | clusters_to_add, mark_unwritten, |
| 547 | data_ac, meta_ac, reason_ret); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 548 | |
| 549 | return ret; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 550 | } |
| 551 | |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 552 | static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start, |
| 553 | u32 clusters_to_add, int mark_unwritten) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 554 | { |
| 555 | int status = 0; |
| 556 | int restart_func = 0; |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 557 | int credits; |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 558 | u32 prev_clusters; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 559 | struct buffer_head *bh = NULL; |
| 560 | struct ocfs2_dinode *fe = NULL; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 561 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 562 | struct ocfs2_alloc_context *data_ac = NULL; |
| 563 | struct ocfs2_alloc_context *meta_ac = NULL; |
| 564 | enum ocfs2_alloc_restarted why; |
| 565 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 566 | struct ocfs2_extent_tree et; |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 567 | int did_quota = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 568 | |
Tao Ma | ef6b689 | 2011-02-21 11:10:44 +0800 | [diff] [blame] | 569 | mlog(0, "(clusters_to_add = %u)\n", clusters_to_add); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 570 | |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 571 | /* |
| 572 | * This function only exists for file systems which don't |
| 573 | * support holes. |
| 574 | */ |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 575 | BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb)); |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 576 | |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 577 | status = ocfs2_read_inode_block(inode, &bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 578 | if (status < 0) { |
| 579 | mlog_errno(status); |
| 580 | goto leave; |
| 581 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 582 | fe = (struct ocfs2_dinode *) bh->b_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 583 | |
| 584 | restart_all: |
| 585 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); |
| 586 | |
Tao Ma | e7d4cb6 | 2008-08-18 17:38:44 +0800 | [diff] [blame] | 587 | mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, " |
| 588 | "clusters_to_add = %u\n", |
| 589 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 590 | (long long)i_size_read(inode), le32_to_cpu(fe->i_clusters), |
| 591 | clusters_to_add); |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 592 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 593 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
| 594 | &data_ac, &meta_ac); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 595 | if (status) { |
| 596 | mlog_errno(status); |
| 597 | goto leave; |
| 598 | } |
| 599 | |
Tao Ma | 811f933 | 2008-08-18 17:38:43 +0800 | [diff] [blame] | 600 | credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list, |
| 601 | clusters_to_add); |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 602 | handle = ocfs2_start_trans(osb, credits); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 603 | if (IS_ERR(handle)) { |
| 604 | status = PTR_ERR(handle); |
| 605 | handle = NULL; |
| 606 | mlog_errno(status); |
| 607 | goto leave; |
| 608 | } |
| 609 | |
| 610 | restarted_transaction: |
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) { |
| 657 | mlog(0, "restarting function.\n"); |
| 658 | restart_func = 1; |
Tao Ma | 7968184 | 2010-04-16 13:59:25 +0800 | [diff] [blame] | 659 | status = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 660 | } else { |
| 661 | BUG_ON(why != RESTART_TRANS); |
| 662 | |
| 663 | mlog(0, "restarting transaction.\n"); |
| 664 | /* TODO: This can be more intelligent. */ |
| 665 | credits = ocfs2_calc_extend_credits(osb->sb, |
Tao Ma | 811f933 | 2008-08-18 17:38:43 +0800 | [diff] [blame] | 666 | &fe->id2.i_list, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 667 | clusters_to_add); |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 668 | status = ocfs2_extend_trans(handle, credits); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 669 | if (status < 0) { |
| 670 | /* handle still has to be committed at |
| 671 | * this point. */ |
| 672 | status = -ENOMEM; |
| 673 | mlog_errno(status); |
| 674 | goto leave; |
| 675 | } |
| 676 | goto restarted_transaction; |
| 677 | } |
| 678 | } |
| 679 | |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 680 | mlog(0, "fe: i_clusters = %u, i_size=%llu\n", |
Mark Fasheh | 1ca1a11 | 2007-04-27 16:01:25 -0700 | [diff] [blame] | 681 | le32_to_cpu(fe->i_clusters), |
| 682 | (unsigned long long)le64_to_cpu(fe->i_size)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 683 | mlog(0, "inode: ip_clusters=%u, i_size=%lld\n", |
Jan Kara | 634bf74 | 2007-12-19 15:25:42 +0100 | [diff] [blame] | 684 | OCFS2_I(inode)->ip_clusters, (long long)i_size_read(inode)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 685 | |
| 686 | leave: |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 687 | if (status < 0 && did_quota) |
Christoph Hellwig | 5dd4056 | 2010-03-03 09:05:00 -0500 | [diff] [blame] | 688 | dquot_free_space(inode, |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 689 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 690 | if (handle) { |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 691 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 692 | handle = NULL; |
| 693 | } |
| 694 | if (data_ac) { |
| 695 | ocfs2_free_alloc_context(data_ac); |
| 696 | data_ac = NULL; |
| 697 | } |
| 698 | if (meta_ac) { |
| 699 | ocfs2_free_alloc_context(meta_ac); |
| 700 | meta_ac = NULL; |
| 701 | } |
| 702 | if ((!status) && restart_func) { |
| 703 | restart_func = 0; |
| 704 | goto restart_all; |
| 705 | } |
Mark Fasheh | a81cb88 | 2008-10-07 14:25:16 -0700 | [diff] [blame] | 706 | brelse(bh); |
| 707 | bh = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 708 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 709 | return status; |
| 710 | } |
| 711 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 712 | /* |
| 713 | * While a write will already be ordering the data, a truncate will not. |
| 714 | * Thus, we need to explicitly order the zeroed pages. |
| 715 | */ |
| 716 | static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode) |
| 717 | { |
| 718 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 719 | handle_t *handle = NULL; |
| 720 | int ret = 0; |
| 721 | |
| 722 | if (!ocfs2_should_order_data(inode)) |
| 723 | goto out; |
| 724 | |
| 725 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| 726 | if (IS_ERR(handle)) { |
| 727 | ret = -ENOMEM; |
| 728 | mlog_errno(ret); |
| 729 | goto out; |
| 730 | } |
| 731 | |
| 732 | ret = ocfs2_jbd2_file_inode(handle, inode); |
| 733 | if (ret < 0) |
| 734 | mlog_errno(ret); |
| 735 | |
| 736 | out: |
| 737 | if (ret) { |
| 738 | if (!IS_ERR(handle)) |
| 739 | ocfs2_commit_trans(osb, handle); |
| 740 | handle = ERR_PTR(ret); |
| 741 | } |
| 742 | return handle; |
| 743 | } |
| 744 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 745 | /* Some parts of this taken from generic_cont_expand, which turned out |
| 746 | * 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] | 747 | * worry about recursive locking in ->write_begin() and ->write_end(). */ |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 748 | static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from, |
| 749 | u64 abs_to) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 750 | { |
| 751 | struct address_space *mapping = inode->i_mapping; |
| 752 | struct page *page; |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 753 | unsigned long index = abs_from >> PAGE_CACHE_SHIFT; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 754 | handle_t *handle = NULL; |
Joel Becker | 5453258 | 2010-07-16 13:32:33 -0700 | [diff] [blame] | 755 | int ret = 0; |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 756 | unsigned zero_from, zero_to, block_start, block_end; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 757 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 758 | BUG_ON(abs_from >= abs_to); |
| 759 | BUG_ON(abs_to > (((u64)index + 1) << PAGE_CACHE_SHIFT)); |
| 760 | BUG_ON(abs_from & (inode->i_blkbits - 1)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 761 | |
Jan Kara | 9b4c0ff | 2010-08-24 14:28:03 +0200 | [diff] [blame] | 762 | page = find_or_create_page(mapping, index, GFP_NOFS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 763 | if (!page) { |
| 764 | ret = -ENOMEM; |
| 765 | mlog_errno(ret); |
| 766 | goto out; |
| 767 | } |
| 768 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 769 | /* Get the offsets within the page that we want to zero */ |
| 770 | zero_from = abs_from & (PAGE_CACHE_SIZE - 1); |
| 771 | zero_to = abs_to & (PAGE_CACHE_SIZE - 1); |
| 772 | if (!zero_to) |
| 773 | zero_to = PAGE_CACHE_SIZE; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 774 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 775 | mlog(0, |
| 776 | "abs_from = %llu, abs_to = %llu, index = %lu, zero_from = %u, zero_to = %u\n", |
| 777 | (unsigned long long)abs_from, (unsigned long long)abs_to, |
| 778 | index, zero_from, zero_to); |
| 779 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 780 | /* We know that zero_from is block aligned */ |
| 781 | for (block_start = zero_from; block_start < zero_to; |
| 782 | block_start = block_end) { |
| 783 | block_end = block_start + (1 << inode->i_blkbits); |
| 784 | |
| 785 | /* |
Christoph Hellwig | ebdec24 | 2010-10-06 10:47:23 +0200 | [diff] [blame] | 786 | * block_start is block-aligned. Bump it by one to force |
| 787 | * __block_write_begin and block_commit_write to zero the |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 788 | * whole block. |
| 789 | */ |
Christoph Hellwig | ebdec24 | 2010-10-06 10:47:23 +0200 | [diff] [blame] | 790 | ret = __block_write_begin(page, block_start + 1, 0, |
| 791 | ocfs2_get_block); |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 792 | if (ret < 0) { |
| 793 | mlog_errno(ret); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 794 | goto out_unlock; |
| 795 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 796 | |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 797 | if (!handle) { |
| 798 | handle = ocfs2_zero_start_ordered_transaction(inode); |
| 799 | if (IS_ERR(handle)) { |
| 800 | ret = PTR_ERR(handle); |
| 801 | handle = NULL; |
| 802 | break; |
| 803 | } |
| 804 | } |
| 805 | |
| 806 | /* must not update i_size! */ |
| 807 | ret = block_commit_write(page, block_start + 1, |
| 808 | block_start + 1); |
| 809 | if (ret < 0) |
| 810 | mlog_errno(ret); |
| 811 | else |
| 812 | ret = 0; |
| 813 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 814 | |
| 815 | if (handle) |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 816 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
Joel Becker | a4bfb4c | 2010-07-06 14:36:06 -0700 | [diff] [blame] | 817 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 818 | out_unlock: |
| 819 | unlock_page(page); |
| 820 | page_cache_release(page); |
| 821 | out: |
| 822 | return ret; |
| 823 | } |
| 824 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 825 | /* |
| 826 | * Find the next range to zero. We do this in terms of bytes because |
| 827 | * that's what ocfs2_zero_extend() wants, and it is dealing with the |
| 828 | * pagecache. We may return multiple extents. |
| 829 | * |
| 830 | * zero_start and zero_end are ocfs2_zero_extend()s current idea of what |
| 831 | * needs to be zeroed. range_start and range_end return the next zeroing |
| 832 | * range. A subsequent call should pass the previous range_end as its |
| 833 | * zero_start. If range_end is 0, there's nothing to do. |
| 834 | * |
| 835 | * Unwritten extents are skipped over. Refcounted extents are CoWd. |
| 836 | */ |
| 837 | static int ocfs2_zero_extend_get_range(struct inode *inode, |
| 838 | struct buffer_head *di_bh, |
| 839 | u64 zero_start, u64 zero_end, |
| 840 | u64 *range_start, u64 *range_end) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 841 | { |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 842 | int rc = 0, needs_cow = 0; |
| 843 | u32 p_cpos, zero_clusters = 0; |
| 844 | u32 zero_cpos = |
| 845 | zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 846 | u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end); |
| 847 | unsigned int num_clusters = 0; |
| 848 | unsigned int ext_flags = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 849 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 850 | while (zero_cpos < last_cpos) { |
| 851 | rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos, |
| 852 | &num_clusters, &ext_flags); |
| 853 | if (rc) { |
| 854 | mlog_errno(rc); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 855 | goto out; |
| 856 | } |
| 857 | |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 858 | if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) { |
| 859 | zero_clusters = num_clusters; |
| 860 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
| 861 | needs_cow = 1; |
| 862 | break; |
| 863 | } |
| 864 | |
| 865 | zero_cpos += num_clusters; |
| 866 | } |
| 867 | if (!zero_clusters) { |
| 868 | *range_end = 0; |
| 869 | goto out; |
| 870 | } |
| 871 | |
| 872 | while ((zero_cpos + zero_clusters) < last_cpos) { |
| 873 | rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters, |
| 874 | &p_cpos, &num_clusters, |
| 875 | &ext_flags); |
| 876 | if (rc) { |
| 877 | mlog_errno(rc); |
| 878 | goto out; |
| 879 | } |
| 880 | |
| 881 | if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN)) |
| 882 | break; |
| 883 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
| 884 | needs_cow = 1; |
| 885 | zero_clusters += num_clusters; |
| 886 | } |
| 887 | if ((zero_cpos + zero_clusters) > last_cpos) |
| 888 | zero_clusters = last_cpos - zero_cpos; |
| 889 | |
| 890 | if (needs_cow) { |
Tao Ma | 1550271 | 2010-08-12 10:36:38 +0800 | [diff] [blame] | 891 | rc = ocfs2_refcount_cow(inode, NULL, di_bh, zero_cpos, |
| 892 | zero_clusters, UINT_MAX); |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 893 | if (rc) { |
| 894 | mlog_errno(rc); |
| 895 | goto out; |
| 896 | } |
| 897 | } |
| 898 | |
| 899 | *range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos); |
| 900 | *range_end = ocfs2_clusters_to_bytes(inode->i_sb, |
| 901 | zero_cpos + zero_clusters); |
| 902 | |
| 903 | out: |
| 904 | return rc; |
| 905 | } |
| 906 | |
| 907 | /* |
| 908 | * Zero one range returned from ocfs2_zero_extend_get_range(). The caller |
| 909 | * has made sure that the entire range needs zeroing. |
| 910 | */ |
| 911 | static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start, |
| 912 | u64 range_end) |
| 913 | { |
| 914 | int rc = 0; |
| 915 | u64 next_pos; |
| 916 | u64 zero_pos = range_start; |
| 917 | |
| 918 | mlog(0, "range_start = %llu, range_end = %llu\n", |
| 919 | (unsigned long long)range_start, |
| 920 | (unsigned long long)range_end); |
| 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)); |
| 952 | mlog(0, "zero_start %llu for i_size %llu\n", |
| 953 | (unsigned long long)zero_start, |
| 954 | (unsigned long long)i_size_read(inode)); |
| 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 | ef6b689 | 2011-02-21 11:10:44 +0800 | [diff] [blame] | 1103 | mlog(0, "(0x%p, '%.*s')\n", dentry, |
| 1104 | dentry->d_name.len, dentry->d_name.name); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1105 | |
Sunil Mushran | bc53580 | 2008-04-18 10:23:53 -0700 | [diff] [blame] | 1106 | /* ensuring we don't even attempt to truncate a symlink */ |
| 1107 | if (S_ISLNK(inode->i_mode)) |
| 1108 | attr->ia_valid &= ~ATTR_SIZE; |
| 1109 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1110 | if (attr->ia_valid & ATTR_MODE) |
| 1111 | mlog(0, "mode change: %d\n", attr->ia_mode); |
| 1112 | if (attr->ia_valid & ATTR_UID) |
| 1113 | mlog(0, "uid change: %d\n", attr->ia_uid); |
| 1114 | if (attr->ia_valid & ATTR_GID) |
| 1115 | mlog(0, "gid change: %d\n", attr->ia_gid); |
| 1116 | if (attr->ia_valid & ATTR_SIZE) |
| 1117 | mlog(0, "size change...\n"); |
| 1118 | if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME)) |
| 1119 | mlog(0, "time change...\n"); |
| 1120 | |
| 1121 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ |
| 1122 | | ATTR_GID | ATTR_UID | ATTR_MODE) |
| 1123 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) { |
| 1124 | mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid); |
| 1125 | return 0; |
| 1126 | } |
| 1127 | |
| 1128 | status = inode_change_ok(inode, attr); |
| 1129 | if (status) |
| 1130 | return status; |
| 1131 | |
Dmitry Monakhov | 1275562 | 2010-04-08 22:04:20 +0400 | [diff] [blame] | 1132 | if (is_quota_modification(inode, attr)) |
| 1133 | dquot_initialize(inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1134 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; |
| 1135 | if (size_change) { |
| 1136 | status = ocfs2_rw_lock(inode, 1); |
| 1137 | if (status < 0) { |
| 1138 | mlog_errno(status); |
| 1139 | goto bail; |
| 1140 | } |
| 1141 | } |
| 1142 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1143 | status = ocfs2_inode_lock(inode, &bh, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1144 | if (status < 0) { |
| 1145 | if (status != -ENOENT) |
| 1146 | mlog_errno(status); |
| 1147 | goto bail_unlock_rw; |
| 1148 | } |
| 1149 | |
| 1150 | if (size_change && attr->ia_size != i_size_read(inode)) { |
Wengang Wang | 5051f76 | 2010-02-26 18:18:25 +0800 | [diff] [blame] | 1151 | status = inode_newsize_ok(inode, attr->ia_size); |
| 1152 | if (status) |
Mark Fasheh | ce76fd3 | 2007-07-20 12:02:14 -0700 | [diff] [blame] | 1153 | goto bail_unlock; |
Mark Fasheh | ce76fd3 | 2007-07-20 12:02:14 -0700 | [diff] [blame] | 1154 | |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 1155 | if (i_size_read(inode) > attr->ia_size) { |
| 1156 | if (ocfs2_should_order_data(inode)) { |
| 1157 | status = ocfs2_begin_ordered_truncate(inode, |
| 1158 | attr->ia_size); |
| 1159 | if (status) |
| 1160 | goto bail_unlock; |
| 1161 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1162 | status = ocfs2_truncate_file(inode, bh, attr->ia_size); |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 1163 | } else |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1164 | status = ocfs2_extend_file(inode, bh, attr->ia_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1165 | if (status < 0) { |
| 1166 | if (status != -ENOSPC) |
| 1167 | mlog_errno(status); |
| 1168 | status = -ENOSPC; |
| 1169 | goto bail_unlock; |
| 1170 | } |
| 1171 | } |
| 1172 | |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1173 | if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) || |
| 1174 | (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1175 | /* |
| 1176 | * Gather pointers to quota structures so that allocation / |
| 1177 | * freeing of quota structures happens here and not inside |
Christoph Hellwig | b43fa82 | 2010-03-03 09:05:03 -0500 | [diff] [blame] | 1178 | * dquot_transfer() where we have problems with lock ordering |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1179 | */ |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1180 | if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid |
| 1181 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
| 1182 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1183 | transfer_to[USRQUOTA] = dqget(sb, attr->ia_uid, |
| 1184 | USRQUOTA); |
Jan Kara | 52a9ee2 | 2010-05-13 20:18:45 +0200 | [diff] [blame] | 1185 | if (!transfer_to[USRQUOTA]) { |
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 | } |
| 1190 | if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid |
| 1191 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
| 1192 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1193 | transfer_to[GRPQUOTA] = dqget(sb, attr->ia_gid, |
| 1194 | GRPQUOTA); |
Jan Kara | 52a9ee2 | 2010-05-13 20:18:45 +0200 | [diff] [blame] | 1195 | if (!transfer_to[GRPQUOTA]) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1196 | status = -ESRCH; |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1197 | goto bail_unlock; |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1198 | } |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1199 | } |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1200 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS + |
| 1201 | 2 * ocfs2_quota_trans_credits(sb)); |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1202 | if (IS_ERR(handle)) { |
| 1203 | status = PTR_ERR(handle); |
| 1204 | mlog_errno(status); |
| 1205 | goto bail_unlock; |
| 1206 | } |
Jan Kara | 52a9ee2 | 2010-05-13 20:18:45 +0200 | [diff] [blame] | 1207 | status = __dquot_transfer(inode, transfer_to); |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1208 | if (status < 0) |
| 1209 | goto bail_commit; |
| 1210 | } else { |
| 1211 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| 1212 | if (IS_ERR(handle)) { |
| 1213 | status = PTR_ERR(handle); |
| 1214 | mlog_errno(status); |
| 1215 | goto bail_unlock; |
| 1216 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1217 | } |
| 1218 | |
Mark Fasheh | 7307de8 | 2007-05-09 15:16:19 -0700 | [diff] [blame] | 1219 | /* |
Christoph Hellwig | 2c27c65 | 2010-06-04 11:30:04 +0200 | [diff] [blame] | 1220 | * This will intentionally not wind up calling truncate_setsize(), |
Mark Fasheh | 7307de8 | 2007-05-09 15:16:19 -0700 | [diff] [blame] | 1221 | * since all the work for a size change has been done above. |
| 1222 | * Otherwise, we could get into problems with truncate as |
| 1223 | * ip_alloc_sem is used there to protect against i_size |
| 1224 | * changes. |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1225 | * |
| 1226 | * XXX: this means the conditional below can probably be removed. |
Mark Fasheh | 7307de8 | 2007-05-09 15:16:19 -0700 | [diff] [blame] | 1227 | */ |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1228 | if ((attr->ia_valid & ATTR_SIZE) && |
| 1229 | attr->ia_size != i_size_read(inode)) { |
| 1230 | status = vmtruncate(inode, attr->ia_size); |
| 1231 | if (status) { |
| 1232 | mlog_errno(status); |
| 1233 | goto bail_commit; |
| 1234 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1235 | } |
| 1236 | |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1237 | setattr_copy(inode, attr); |
| 1238 | mark_inode_dirty(inode); |
| 1239 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1240 | status = ocfs2_mark_inode_dirty(handle, inode, bh); |
| 1241 | if (status < 0) |
| 1242 | mlog_errno(status); |
| 1243 | |
| 1244 | bail_commit: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 1245 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1246 | bail_unlock: |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1247 | ocfs2_inode_unlock(inode, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1248 | bail_unlock_rw: |
| 1249 | if (size_change) |
| 1250 | ocfs2_rw_unlock(inode, 1); |
| 1251 | bail: |
Mark Fasheh | a81cb88 | 2008-10-07 14:25:16 -0700 | [diff] [blame] | 1252 | brelse(bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1253 | |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1254 | /* Release quota pointers in case we acquired them */ |
Jan Kara | 52a9ee2 | 2010-05-13 20:18:45 +0200 | [diff] [blame] | 1255 | for (qtype = 0; qtype < MAXQUOTAS; qtype++) |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1256 | dqput(transfer_to[qtype]); |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1257 | |
Tiger Yang | 060bc66 | 2008-11-14 11:17:29 +0800 | [diff] [blame] | 1258 | if (!status && attr->ia_valid & ATTR_MODE) { |
| 1259 | status = ocfs2_acl_chmod(inode); |
| 1260 | if (status < 0) |
| 1261 | mlog_errno(status); |
| 1262 | } |
| 1263 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1264 | return status; |
| 1265 | } |
| 1266 | |
| 1267 | int ocfs2_getattr(struct vfsmount *mnt, |
| 1268 | struct dentry *dentry, |
| 1269 | struct kstat *stat) |
| 1270 | { |
| 1271 | struct inode *inode = dentry->d_inode; |
| 1272 | struct super_block *sb = dentry->d_inode->i_sb; |
| 1273 | struct ocfs2_super *osb = sb->s_fs_info; |
| 1274 | int err; |
| 1275 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1276 | err = ocfs2_inode_revalidate(dentry); |
| 1277 | if (err) { |
| 1278 | if (err != -ENOENT) |
| 1279 | mlog_errno(err); |
| 1280 | goto bail; |
| 1281 | } |
| 1282 | |
| 1283 | generic_fillattr(inode, stat); |
| 1284 | |
| 1285 | /* We set the blksize from the cluster size for performance */ |
| 1286 | stat->blksize = osb->s_clustersize; |
| 1287 | |
| 1288 | bail: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1289 | return err; |
| 1290 | } |
| 1291 | |
Nick Piggin | b74c79e | 2011-01-07 17:49:58 +1100 | [diff] [blame] | 1292 | int ocfs2_permission(struct inode *inode, int mask, unsigned int flags) |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1293 | { |
| 1294 | int ret; |
| 1295 | |
Nick Piggin | b74c79e | 2011-01-07 17:49:58 +1100 | [diff] [blame] | 1296 | if (flags & IPERM_FLAG_RCU) |
| 1297 | return -ECHILD; |
| 1298 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1299 | ret = ocfs2_inode_lock(inode, NULL, 0); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1300 | if (ret) { |
Mark Fasheh | a9f5f70 | 2007-04-26 11:43:43 -0700 | [diff] [blame] | 1301 | if (ret != -ENOENT) |
| 1302 | mlog_errno(ret); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1303 | goto out; |
| 1304 | } |
| 1305 | |
Nick Piggin | b74c79e | 2011-01-07 17:49:58 +1100 | [diff] [blame] | 1306 | ret = generic_permission(inode, mask, flags, ocfs2_check_acl); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1307 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1308 | ocfs2_inode_unlock(inode, 0); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1309 | out: |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1310 | return ret; |
| 1311 | } |
| 1312 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1313 | static int __ocfs2_write_remove_suid(struct inode *inode, |
| 1314 | struct buffer_head *bh) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1315 | { |
| 1316 | int ret; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1317 | handle_t *handle; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1318 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1319 | struct ocfs2_dinode *di; |
| 1320 | |
Tao Ma | ef6b689 | 2011-02-21 11:10:44 +0800 | [diff] [blame] | 1321 | mlog(0, "(Inode %llu, mode 0%o)\n", |
| 1322 | (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1323 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 1324 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 1325 | if (IS_ERR(handle)) { |
| 1326 | ret = PTR_ERR(handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1327 | mlog_errno(ret); |
| 1328 | goto out; |
| 1329 | } |
| 1330 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 1331 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 1332 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1333 | if (ret < 0) { |
| 1334 | mlog_errno(ret); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1335 | goto out_trans; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1336 | } |
| 1337 | |
| 1338 | inode->i_mode &= ~S_ISUID; |
| 1339 | if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP)) |
| 1340 | inode->i_mode &= ~S_ISGID; |
| 1341 | |
| 1342 | di = (struct ocfs2_dinode *) bh->b_data; |
| 1343 | di->i_mode = cpu_to_le16(inode->i_mode); |
| 1344 | |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 1345 | ocfs2_journal_dirty(handle, bh); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1346 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1347 | out_trans: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 1348 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1349 | out: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1350 | return ret; |
| 1351 | } |
| 1352 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1353 | /* |
| 1354 | * Will look for holes and unwritten extents in the range starting at |
| 1355 | * pos for count bytes (inclusive). |
| 1356 | */ |
| 1357 | static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos, |
| 1358 | size_t count) |
| 1359 | { |
| 1360 | int ret = 0; |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1361 | unsigned int extent_flags; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1362 | u32 cpos, clusters, extent_len, phys_cpos; |
| 1363 | struct super_block *sb = inode->i_sb; |
| 1364 | |
| 1365 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; |
| 1366 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; |
| 1367 | |
| 1368 | while (clusters) { |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1369 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
| 1370 | &extent_flags); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1371 | if (ret < 0) { |
| 1372 | mlog_errno(ret); |
| 1373 | goto out; |
| 1374 | } |
| 1375 | |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1376 | if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1377 | ret = 1; |
| 1378 | break; |
| 1379 | } |
| 1380 | |
| 1381 | if (extent_len > clusters) |
| 1382 | extent_len = clusters; |
| 1383 | |
| 1384 | clusters -= extent_len; |
| 1385 | cpos += extent_len; |
| 1386 | } |
| 1387 | out: |
| 1388 | return ret; |
| 1389 | } |
| 1390 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1391 | static int ocfs2_write_remove_suid(struct inode *inode) |
| 1392 | { |
| 1393 | int ret; |
| 1394 | struct buffer_head *bh = NULL; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1395 | |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 1396 | ret = ocfs2_read_inode_block(inode, &bh); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1397 | if (ret < 0) { |
| 1398 | mlog_errno(ret); |
| 1399 | goto out; |
| 1400 | } |
| 1401 | |
| 1402 | ret = __ocfs2_write_remove_suid(inode, bh); |
| 1403 | out: |
| 1404 | brelse(bh); |
| 1405 | return ret; |
| 1406 | } |
| 1407 | |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1408 | /* |
| 1409 | * Allocate enough extents to cover the region starting at byte offset |
| 1410 | * start for len bytes. Existing extents are skipped, any extents |
| 1411 | * added are marked as "unwritten". |
| 1412 | */ |
| 1413 | static int ocfs2_allocate_unwritten_extents(struct inode *inode, |
| 1414 | u64 start, u64 len) |
| 1415 | { |
| 1416 | int ret; |
| 1417 | u32 cpos, phys_cpos, clusters, alloc_size; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1418 | u64 end = start + len; |
| 1419 | struct buffer_head *di_bh = NULL; |
| 1420 | |
| 1421 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 1422 | ret = ocfs2_read_inode_block(inode, &di_bh); |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1423 | if (ret) { |
| 1424 | mlog_errno(ret); |
| 1425 | goto out; |
| 1426 | } |
| 1427 | |
| 1428 | /* |
| 1429 | * Nothing to do if the requested reservation range |
| 1430 | * fits within the inode. |
| 1431 | */ |
| 1432 | if (ocfs2_size_fits_inline_data(di_bh, end)) |
| 1433 | goto out; |
| 1434 | |
| 1435 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); |
| 1436 | if (ret) { |
| 1437 | mlog_errno(ret); |
| 1438 | goto out; |
| 1439 | } |
| 1440 | } |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1441 | |
| 1442 | /* |
| 1443 | * We consider both start and len to be inclusive. |
| 1444 | */ |
| 1445 | cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 1446 | clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len); |
| 1447 | clusters -= cpos; |
| 1448 | |
| 1449 | while (clusters) { |
| 1450 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, |
| 1451 | &alloc_size, NULL); |
| 1452 | if (ret) { |
| 1453 | mlog_errno(ret); |
| 1454 | goto out; |
| 1455 | } |
| 1456 | |
| 1457 | /* |
| 1458 | * Hole or existing extent len can be arbitrary, so |
| 1459 | * cap it to our own allocation request. |
| 1460 | */ |
| 1461 | if (alloc_size > clusters) |
| 1462 | alloc_size = clusters; |
| 1463 | |
| 1464 | if (phys_cpos) { |
| 1465 | /* |
| 1466 | * We already have an allocation at this |
| 1467 | * region so we can safely skip it. |
| 1468 | */ |
| 1469 | goto next; |
| 1470 | } |
| 1471 | |
| 1472 | ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1); |
| 1473 | if (ret) { |
| 1474 | if (ret != -ENOSPC) |
| 1475 | mlog_errno(ret); |
| 1476 | goto out; |
| 1477 | } |
| 1478 | |
| 1479 | next: |
| 1480 | cpos += alloc_size; |
| 1481 | clusters -= alloc_size; |
| 1482 | } |
| 1483 | |
| 1484 | ret = 0; |
| 1485 | out: |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1486 | |
| 1487 | brelse(di_bh); |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1488 | return ret; |
| 1489 | } |
| 1490 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1491 | /* |
| 1492 | * Truncate a byte range, avoiding pages within partial clusters. This |
| 1493 | * preserves those pages for the zeroing code to write to. |
| 1494 | */ |
| 1495 | static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start, |
| 1496 | u64 byte_len) |
| 1497 | { |
| 1498 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1499 | loff_t start, end; |
| 1500 | struct address_space *mapping = inode->i_mapping; |
| 1501 | |
| 1502 | start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start); |
| 1503 | end = byte_start + byte_len; |
| 1504 | end = end & ~(osb->s_clustersize - 1); |
| 1505 | |
| 1506 | if (start < end) { |
| 1507 | unmap_mapping_range(mapping, start, end - start, 0); |
| 1508 | truncate_inode_pages_range(mapping, start, end - 1); |
| 1509 | } |
| 1510 | } |
| 1511 | |
| 1512 | static int ocfs2_zero_partial_clusters(struct inode *inode, |
| 1513 | u64 start, u64 len) |
| 1514 | { |
| 1515 | int ret = 0; |
| 1516 | u64 tmpend, end = start + len; |
| 1517 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1518 | unsigned int csize = osb->s_clustersize; |
| 1519 | handle_t *handle; |
| 1520 | |
| 1521 | /* |
| 1522 | * The "start" and "end" values are NOT necessarily part of |
| 1523 | * the range whose allocation is being deleted. Rather, this |
| 1524 | * is what the user passed in with the request. We must zero |
| 1525 | * partial clusters here. There's no need to worry about |
| 1526 | * physical allocation - the zeroing code knows to skip holes. |
| 1527 | */ |
| 1528 | mlog(0, "byte start: %llu, end: %llu\n", |
| 1529 | (unsigned long long)start, (unsigned long long)end); |
| 1530 | |
| 1531 | /* |
| 1532 | * If both edges are on a cluster boundary then there's no |
| 1533 | * zeroing required as the region is part of the allocation to |
| 1534 | * be truncated. |
| 1535 | */ |
| 1536 | if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0) |
| 1537 | goto out; |
| 1538 | |
| 1539 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 1540 | if (IS_ERR(handle)) { |
| 1541 | ret = PTR_ERR(handle); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1542 | mlog_errno(ret); |
| 1543 | goto out; |
| 1544 | } |
| 1545 | |
| 1546 | /* |
| 1547 | * We want to get the byte offset of the end of the 1st cluster. |
| 1548 | */ |
| 1549 | tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1)); |
| 1550 | if (tmpend > end) |
| 1551 | tmpend = end; |
| 1552 | |
| 1553 | mlog(0, "1st range: start: %llu, tmpend: %llu\n", |
| 1554 | (unsigned long long)start, (unsigned long long)tmpend); |
| 1555 | |
| 1556 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend); |
| 1557 | if (ret) |
| 1558 | mlog_errno(ret); |
| 1559 | |
| 1560 | if (tmpend < end) { |
| 1561 | /* |
| 1562 | * This may make start and end equal, but the zeroing |
| 1563 | * code will skip any work in that case so there's no |
| 1564 | * need to catch it up here. |
| 1565 | */ |
| 1566 | start = end & ~(osb->s_clustersize - 1); |
| 1567 | |
| 1568 | mlog(0, "2nd range: start: %llu, end: %llu\n", |
| 1569 | (unsigned long long)start, (unsigned long long)end); |
| 1570 | |
| 1571 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, end); |
| 1572 | if (ret) |
| 1573 | mlog_errno(ret); |
| 1574 | } |
| 1575 | |
| 1576 | ocfs2_commit_trans(osb, handle); |
| 1577 | out: |
| 1578 | return ret; |
| 1579 | } |
| 1580 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1581 | static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos) |
| 1582 | { |
| 1583 | int i; |
| 1584 | struct ocfs2_extent_rec *rec = NULL; |
| 1585 | |
| 1586 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { |
| 1587 | |
| 1588 | rec = &el->l_recs[i]; |
| 1589 | |
| 1590 | if (le32_to_cpu(rec->e_cpos) < pos) |
| 1591 | break; |
| 1592 | } |
| 1593 | |
| 1594 | return i; |
| 1595 | } |
| 1596 | |
| 1597 | /* |
| 1598 | * Helper to calculate the punching pos and length in one run, we handle the |
| 1599 | * following three cases in order: |
| 1600 | * |
| 1601 | * - remove the entire record |
| 1602 | * - remove a partial record |
| 1603 | * - no record needs to be removed (hole-punching completed) |
| 1604 | */ |
| 1605 | static void ocfs2_calc_trunc_pos(struct inode *inode, |
| 1606 | struct ocfs2_extent_list *el, |
| 1607 | struct ocfs2_extent_rec *rec, |
| 1608 | u32 trunc_start, u32 *trunc_cpos, |
| 1609 | u32 *trunc_len, u32 *trunc_end, |
| 1610 | u64 *blkno, int *done) |
| 1611 | { |
| 1612 | int ret = 0; |
| 1613 | u32 coff, range; |
| 1614 | |
| 1615 | range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec); |
| 1616 | |
| 1617 | if (le32_to_cpu(rec->e_cpos) >= trunc_start) { |
| 1618 | *trunc_cpos = le32_to_cpu(rec->e_cpos); |
| 1619 | /* |
| 1620 | * Skip holes if any. |
| 1621 | */ |
| 1622 | if (range < *trunc_end) |
| 1623 | *trunc_end = range; |
| 1624 | *trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos); |
| 1625 | *blkno = le64_to_cpu(rec->e_blkno); |
| 1626 | *trunc_end = le32_to_cpu(rec->e_cpos); |
| 1627 | } else if (range > trunc_start) { |
| 1628 | *trunc_cpos = trunc_start; |
| 1629 | *trunc_len = *trunc_end - trunc_start; |
| 1630 | coff = trunc_start - le32_to_cpu(rec->e_cpos); |
| 1631 | *blkno = le64_to_cpu(rec->e_blkno) + |
| 1632 | ocfs2_clusters_to_blocks(inode->i_sb, coff); |
| 1633 | *trunc_end = trunc_start; |
| 1634 | } else { |
| 1635 | /* |
| 1636 | * It may have two following possibilities: |
| 1637 | * |
| 1638 | * - last record has been removed |
| 1639 | * - trunc_start was within a hole |
| 1640 | * |
| 1641 | * both two cases mean the completion of hole punching. |
| 1642 | */ |
| 1643 | ret = 1; |
| 1644 | } |
| 1645 | |
| 1646 | *done = ret; |
| 1647 | } |
| 1648 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1649 | static int ocfs2_remove_inode_range(struct inode *inode, |
| 1650 | struct buffer_head *di_bh, u64 byte_start, |
| 1651 | u64 byte_len) |
| 1652 | { |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1653 | int ret = 0, flags = 0, done = 0, i; |
| 1654 | u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos; |
| 1655 | u32 cluster_in_el; |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1656 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1657 | struct ocfs2_cached_dealloc_ctxt dealloc; |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 1658 | struct address_space *mapping = inode->i_mapping; |
Mark Fasheh | fecc011 | 2008-11-12 15:16:38 -0800 | [diff] [blame] | 1659 | struct ocfs2_extent_tree et; |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1660 | struct ocfs2_path *path = NULL; |
| 1661 | struct ocfs2_extent_list *el = NULL; |
| 1662 | struct ocfs2_extent_rec *rec = NULL; |
Tristan Ye | e8aec06 | 2010-05-11 17:54:43 +0800 | [diff] [blame] | 1663 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1664 | u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1665 | |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 1666 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1667 | ocfs2_init_dealloc_ctxt(&dealloc); |
| 1668 | |
| 1669 | if (byte_len == 0) |
| 1670 | return 0; |
| 1671 | |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1672 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 1673 | ret = ocfs2_truncate_inline(inode, di_bh, byte_start, |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 1674 | byte_start + byte_len, 0); |
| 1675 | if (ret) { |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1676 | mlog_errno(ret); |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 1677 | goto out; |
| 1678 | } |
| 1679 | /* |
| 1680 | * There's no need to get fancy with the page cache |
| 1681 | * truncate of an inline-data inode. We're talking |
| 1682 | * about less than a page here, which will be cached |
| 1683 | * in the dinode buffer anyway. |
| 1684 | */ |
| 1685 | unmap_mapping_range(mapping, 0, 0, 0); |
| 1686 | truncate_inode_pages(mapping, 0); |
| 1687 | goto out; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1688 | } |
| 1689 | |
Tristan Ye | e8aec06 | 2010-05-11 17:54:43 +0800 | [diff] [blame] | 1690 | /* |
| 1691 | * For reflinks, we may need to CoW 2 clusters which might be |
| 1692 | * partially zero'd later, if hole's start and end offset were |
| 1693 | * within one cluster(means is not exactly aligned to clustersize). |
| 1694 | */ |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1695 | |
Tristan Ye | e8aec06 | 2010-05-11 17:54:43 +0800 | [diff] [blame] | 1696 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) { |
| 1697 | |
| 1698 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start); |
| 1699 | if (ret) { |
| 1700 | mlog_errno(ret); |
| 1701 | goto out; |
| 1702 | } |
| 1703 | |
| 1704 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len); |
| 1705 | if (ret) { |
| 1706 | mlog_errno(ret); |
| 1707 | goto out; |
| 1708 | } |
| 1709 | } |
| 1710 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1711 | trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start); |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1712 | trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits; |
| 1713 | cluster_in_el = trunc_end; |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1714 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1715 | mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, cend: %u\n", |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1716 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 1717 | (unsigned long long)byte_start, |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1718 | (unsigned long long)byte_len, trunc_start, trunc_end); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1719 | |
| 1720 | ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len); |
| 1721 | if (ret) { |
| 1722 | mlog_errno(ret); |
| 1723 | goto out; |
| 1724 | } |
| 1725 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1726 | path = ocfs2_new_path_from_et(&et); |
| 1727 | if (!path) { |
| 1728 | ret = -ENOMEM; |
| 1729 | mlog_errno(ret); |
| 1730 | goto out; |
| 1731 | } |
| 1732 | |
| 1733 | while (trunc_end > trunc_start) { |
| 1734 | |
| 1735 | ret = ocfs2_find_path(INODE_CACHE(inode), path, |
| 1736 | cluster_in_el); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1737 | if (ret) { |
| 1738 | mlog_errno(ret); |
| 1739 | goto out; |
| 1740 | } |
| 1741 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1742 | el = path_leaf_el(path); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1743 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1744 | i = ocfs2_find_rec(el, trunc_end); |
| 1745 | /* |
| 1746 | * Need to go to previous extent block. |
| 1747 | */ |
| 1748 | if (i < 0) { |
| 1749 | if (path->p_tree_depth == 0) |
| 1750 | break; |
| 1751 | |
| 1752 | ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, |
| 1753 | path, |
| 1754 | &cluster_in_el); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1755 | if (ret) { |
| 1756 | mlog_errno(ret); |
| 1757 | goto out; |
| 1758 | } |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1759 | |
| 1760 | /* |
| 1761 | * We've reached the leftmost extent block, |
| 1762 | * it's safe to leave. |
| 1763 | */ |
| 1764 | if (cluster_in_el == 0) |
| 1765 | break; |
| 1766 | |
| 1767 | /* |
| 1768 | * The 'pos' searched for previous extent block is |
| 1769 | * always one cluster less than actual trunc_end. |
| 1770 | */ |
| 1771 | trunc_end = cluster_in_el + 1; |
| 1772 | |
| 1773 | ocfs2_reinit_path(path, 1); |
| 1774 | |
| 1775 | continue; |
| 1776 | |
| 1777 | } else |
| 1778 | rec = &el->l_recs[i]; |
| 1779 | |
| 1780 | ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos, |
| 1781 | &trunc_len, &trunc_end, &blkno, &done); |
| 1782 | if (done) |
| 1783 | break; |
| 1784 | |
| 1785 | flags = rec->e_flags; |
| 1786 | phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno); |
| 1787 | |
| 1788 | ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos, |
| 1789 | phys_cpos, trunc_len, flags, |
| 1790 | &dealloc, refcount_loc); |
| 1791 | if (ret < 0) { |
| 1792 | mlog_errno(ret); |
| 1793 | goto out; |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1794 | } |
| 1795 | |
Tristan Ye | c1631d4 | 2010-05-11 17:54:45 +0800 | [diff] [blame] | 1796 | cluster_in_el = trunc_end; |
| 1797 | |
| 1798 | ocfs2_reinit_path(path, 1); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1799 | } |
| 1800 | |
| 1801 | ocfs2_truncate_cluster_pages(inode, byte_start, byte_len); |
| 1802 | |
| 1803 | out: |
| 1804 | ocfs2_schedule_truncate_log_flush(osb, 1); |
| 1805 | ocfs2_run_deallocs(osb, &dealloc); |
| 1806 | |
| 1807 | return ret; |
| 1808 | } |
| 1809 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1810 | /* |
| 1811 | * Parts of this function taken from xfs_change_file_space() |
| 1812 | */ |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1813 | static int __ocfs2_change_file_space(struct file *file, struct inode *inode, |
| 1814 | loff_t f_pos, unsigned int cmd, |
| 1815 | struct ocfs2_space_resv *sr, |
| 1816 | int change_size) |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1817 | { |
| 1818 | int ret; |
| 1819 | s64 llen; |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1820 | loff_t size; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1821 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1822 | struct buffer_head *di_bh = NULL; |
| 1823 | handle_t *handle; |
Mark Fasheh | a00cce3 | 2007-07-20 11:28:30 -0700 | [diff] [blame] | 1824 | unsigned long long max_off = inode->i_sb->s_maxbytes; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1825 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1826 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
| 1827 | return -EROFS; |
| 1828 | |
| 1829 | mutex_lock(&inode->i_mutex); |
| 1830 | |
| 1831 | /* |
| 1832 | * This prevents concurrent writes on other nodes |
| 1833 | */ |
| 1834 | ret = ocfs2_rw_lock(inode, 1); |
| 1835 | if (ret) { |
| 1836 | mlog_errno(ret); |
| 1837 | goto out; |
| 1838 | } |
| 1839 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1840 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1841 | if (ret) { |
| 1842 | mlog_errno(ret); |
| 1843 | goto out_rw_unlock; |
| 1844 | } |
| 1845 | |
| 1846 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { |
| 1847 | ret = -EPERM; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1848 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1849 | } |
| 1850 | |
| 1851 | switch (sr->l_whence) { |
| 1852 | case 0: /*SEEK_SET*/ |
| 1853 | break; |
| 1854 | case 1: /*SEEK_CUR*/ |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1855 | sr->l_start += f_pos; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1856 | break; |
| 1857 | case 2: /*SEEK_END*/ |
| 1858 | sr->l_start += i_size_read(inode); |
| 1859 | break; |
| 1860 | default: |
| 1861 | ret = -EINVAL; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1862 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1863 | } |
| 1864 | sr->l_whence = 0; |
| 1865 | |
| 1866 | llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len; |
| 1867 | |
| 1868 | if (sr->l_start < 0 |
| 1869 | || sr->l_start > max_off |
| 1870 | || (sr->l_start + llen) < 0 |
| 1871 | || (sr->l_start + llen) > max_off) { |
| 1872 | ret = -EINVAL; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1873 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1874 | } |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1875 | size = sr->l_start + sr->l_len; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1876 | |
| 1877 | if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) { |
| 1878 | if (sr->l_len <= 0) { |
| 1879 | ret = -EINVAL; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1880 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1881 | } |
| 1882 | } |
| 1883 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1884 | if (file && should_remove_suid(file->f_path.dentry)) { |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1885 | ret = __ocfs2_write_remove_suid(inode, di_bh); |
| 1886 | if (ret) { |
| 1887 | mlog_errno(ret); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1888 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1889 | } |
| 1890 | } |
| 1891 | |
| 1892 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 1893 | switch (cmd) { |
| 1894 | case OCFS2_IOC_RESVSP: |
| 1895 | case OCFS2_IOC_RESVSP64: |
| 1896 | /* |
| 1897 | * This takes unsigned offsets, but the signed ones we |
| 1898 | * pass have been checked against overflow above. |
| 1899 | */ |
| 1900 | ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start, |
| 1901 | sr->l_len); |
| 1902 | break; |
| 1903 | case OCFS2_IOC_UNRESVSP: |
| 1904 | case OCFS2_IOC_UNRESVSP64: |
| 1905 | ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start, |
| 1906 | sr->l_len); |
| 1907 | break; |
| 1908 | default: |
| 1909 | ret = -EINVAL; |
| 1910 | } |
| 1911 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 1912 | if (ret) { |
| 1913 | mlog_errno(ret); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1914 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1915 | } |
| 1916 | |
| 1917 | /* |
| 1918 | * We update c/mtime for these changes |
| 1919 | */ |
| 1920 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| 1921 | if (IS_ERR(handle)) { |
| 1922 | ret = PTR_ERR(handle); |
| 1923 | mlog_errno(ret); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1924 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1925 | } |
| 1926 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1927 | if (change_size && i_size_read(inode) < size) |
| 1928 | i_size_write(inode, size); |
| 1929 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1930 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 1931 | ret = ocfs2_mark_inode_dirty(handle, inode, di_bh); |
| 1932 | if (ret < 0) |
| 1933 | mlog_errno(ret); |
| 1934 | |
| 1935 | ocfs2_commit_trans(osb, handle); |
| 1936 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1937 | out_inode_unlock: |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1938 | brelse(di_bh); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1939 | ocfs2_inode_unlock(inode, 1); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1940 | out_rw_unlock: |
| 1941 | ocfs2_rw_unlock(inode, 1); |
| 1942 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1943 | out: |
Julia Lawall | c259ae5 | 2008-07-21 09:59:15 +0200 | [diff] [blame] | 1944 | mutex_unlock(&inode->i_mutex); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1945 | return ret; |
| 1946 | } |
| 1947 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1948 | int ocfs2_change_file_space(struct file *file, unsigned int cmd, |
| 1949 | struct ocfs2_space_resv *sr) |
| 1950 | { |
| 1951 | struct inode *inode = file->f_path.dentry->d_inode; |
Fernando Carrijo | c19a28e | 2009-01-07 18:09:08 -0800 | [diff] [blame] | 1952 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1953 | |
| 1954 | if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) && |
| 1955 | !ocfs2_writes_unwritten_extents(osb)) |
| 1956 | return -ENOTTY; |
| 1957 | else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) && |
| 1958 | !ocfs2_sparse_alloc(osb)) |
| 1959 | return -ENOTTY; |
| 1960 | |
| 1961 | if (!S_ISREG(inode->i_mode)) |
| 1962 | return -EINVAL; |
| 1963 | |
| 1964 | if (!(file->f_mode & FMODE_WRITE)) |
| 1965 | return -EBADF; |
| 1966 | |
| 1967 | return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0); |
| 1968 | } |
| 1969 | |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 1970 | static long ocfs2_fallocate(struct file *file, int mode, loff_t offset, |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1971 | loff_t len) |
| 1972 | { |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 1973 | struct inode *inode = file->f_path.dentry->d_inode; |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1974 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1975 | struct ocfs2_space_resv sr; |
| 1976 | int change_size = 1; |
Josef Bacik | db47fef | 2010-11-17 20:46:17 -0500 | [diff] [blame] | 1977 | int cmd = OCFS2_IOC_RESVSP64; |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1978 | |
Christoph Hellwig | 64c23e8 | 2011-01-14 13:07:30 +0100 | [diff] [blame] | 1979 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
| 1980 | return -EOPNOTSUPP; |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1981 | if (!ocfs2_writes_unwritten_extents(osb)) |
| 1982 | return -EOPNOTSUPP; |
| 1983 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1984 | if (mode & FALLOC_FL_KEEP_SIZE) |
| 1985 | change_size = 0; |
| 1986 | |
Josef Bacik | db47fef | 2010-11-17 20:46:17 -0500 | [diff] [blame] | 1987 | if (mode & FALLOC_FL_PUNCH_HOLE) |
| 1988 | cmd = OCFS2_IOC_UNRESVSP64; |
| 1989 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1990 | sr.l_whence = 0; |
| 1991 | sr.l_start = (s64)offset; |
| 1992 | sr.l_len = (s64)len; |
| 1993 | |
Josef Bacik | db47fef | 2010-11-17 20:46:17 -0500 | [diff] [blame] | 1994 | return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr, |
| 1995 | change_size); |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1996 | } |
| 1997 | |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 1998 | int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos, |
| 1999 | size_t count) |
| 2000 | { |
| 2001 | int ret = 0; |
| 2002 | unsigned int extent_flags; |
| 2003 | u32 cpos, clusters, extent_len, phys_cpos; |
| 2004 | struct super_block *sb = inode->i_sb; |
| 2005 | |
| 2006 | if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) || |
Tao Ma | 2f48d59 | 2009-10-15 11:10:49 +0800 | [diff] [blame] | 2007 | !(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) || |
| 2008 | OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2009 | return 0; |
| 2010 | |
| 2011 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; |
| 2012 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; |
| 2013 | |
| 2014 | while (clusters) { |
| 2015 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
| 2016 | &extent_flags); |
| 2017 | if (ret < 0) { |
| 2018 | mlog_errno(ret); |
| 2019 | goto out; |
| 2020 | } |
| 2021 | |
| 2022 | if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) { |
| 2023 | ret = 1; |
| 2024 | break; |
| 2025 | } |
| 2026 | |
| 2027 | if (extent_len > clusters) |
| 2028 | extent_len = clusters; |
| 2029 | |
| 2030 | clusters -= extent_len; |
| 2031 | cpos += extent_len; |
| 2032 | } |
| 2033 | out: |
| 2034 | return ret; |
| 2035 | } |
| 2036 | |
| 2037 | static int ocfs2_prepare_inode_for_refcount(struct inode *inode, |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2038 | struct file *file, |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2039 | loff_t pos, size_t count, |
| 2040 | int *meta_level) |
| 2041 | { |
| 2042 | int ret; |
| 2043 | struct buffer_head *di_bh = NULL; |
| 2044 | u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 2045 | u32 clusters = |
| 2046 | ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos; |
| 2047 | |
| 2048 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
| 2049 | if (ret) { |
| 2050 | mlog_errno(ret); |
| 2051 | goto out; |
| 2052 | } |
| 2053 | |
| 2054 | *meta_level = 1; |
| 2055 | |
Tao Ma | 1550271 | 2010-08-12 10:36:38 +0800 | [diff] [blame] | 2056 | ret = ocfs2_refcount_cow(inode, file, di_bh, cpos, clusters, UINT_MAX); |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2057 | if (ret) |
| 2058 | mlog_errno(ret); |
| 2059 | out: |
| 2060 | brelse(di_bh); |
| 2061 | return ret; |
| 2062 | } |
| 2063 | |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2064 | static int ocfs2_prepare_inode_for_write(struct file *file, |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2065 | loff_t *ppos, |
| 2066 | size_t count, |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2067 | int appending, |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2068 | int *direct_io, |
| 2069 | int *has_refcount) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2070 | { |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2071 | int ret = 0, meta_level = 0; |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2072 | struct dentry *dentry = file->f_path.dentry; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2073 | struct inode *inode = dentry->d_inode; |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2074 | loff_t saved_pos, end; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2075 | |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2076 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2077 | * We start with a read level meta lock and only jump to an ex |
| 2078 | * if we need to make modifications here. |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2079 | */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2080 | for(;;) { |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 2081 | ret = ocfs2_inode_lock(inode, NULL, meta_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2082 | if (ret < 0) { |
| 2083 | meta_level = -1; |
| 2084 | mlog_errno(ret); |
| 2085 | goto out; |
| 2086 | } |
| 2087 | |
| 2088 | /* Clear suid / sgid if necessary. We do this here |
| 2089 | * instead of later in the write path because |
| 2090 | * remove_suid() calls ->setattr without any hint that |
| 2091 | * we may have already done our cluster locking. Since |
| 2092 | * ocfs2_setattr() *must* take cluster locks to |
| 2093 | * proceeed, this will lead us to recursively lock the |
| 2094 | * inode. There's also the dinode i_size state which |
| 2095 | * can be lost via setattr during extending writes (we |
| 2096 | * set inode->i_size at the end of a write. */ |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2097 | if (should_remove_suid(dentry)) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2098 | if (meta_level == 0) { |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 2099 | ocfs2_inode_unlock(inode, meta_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2100 | meta_level = 1; |
| 2101 | continue; |
| 2102 | } |
| 2103 | |
| 2104 | ret = ocfs2_write_remove_suid(inode); |
| 2105 | if (ret < 0) { |
| 2106 | mlog_errno(ret); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2107 | goto out_unlock; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2108 | } |
| 2109 | } |
| 2110 | |
| 2111 | /* work on a copy of ppos until we're sure that we won't have |
| 2112 | * to recalculate it due to relocking. */ |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2113 | if (appending) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2114 | saved_pos = i_size_read(inode); |
| 2115 | mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos); |
| 2116 | } else { |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2117 | saved_pos = *ppos; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2118 | } |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 2119 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2120 | end = saved_pos + count; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2121 | |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2122 | ret = ocfs2_check_range_for_refcount(inode, saved_pos, count); |
| 2123 | if (ret == 1) { |
| 2124 | ocfs2_inode_unlock(inode, meta_level); |
| 2125 | meta_level = -1; |
| 2126 | |
| 2127 | ret = ocfs2_prepare_inode_for_refcount(inode, |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2128 | file, |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2129 | saved_pos, |
| 2130 | count, |
| 2131 | &meta_level); |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2132 | if (has_refcount) |
| 2133 | *has_refcount = 1; |
Wengang Wang | 96a1cc7 | 2010-02-09 14:57:45 +0800 | [diff] [blame] | 2134 | if (direct_io) |
| 2135 | *direct_io = 0; |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2136 | } |
| 2137 | |
| 2138 | if (ret < 0) { |
| 2139 | mlog_errno(ret); |
| 2140 | goto out_unlock; |
| 2141 | } |
| 2142 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2143 | /* |
| 2144 | * Skip the O_DIRECT checks if we don't need |
| 2145 | * them. |
| 2146 | */ |
| 2147 | if (!direct_io || !(*direct_io)) |
| 2148 | break; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2149 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2150 | /* |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 2151 | * There's no sane way to do direct writes to an inode |
| 2152 | * with inline data. |
| 2153 | */ |
| 2154 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 2155 | *direct_io = 0; |
| 2156 | break; |
| 2157 | } |
| 2158 | |
| 2159 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2160 | * Allowing concurrent direct writes means |
| 2161 | * i_size changes wouldn't be synchronized, so |
| 2162 | * one node could wind up truncating another |
| 2163 | * nodes writes. |
| 2164 | */ |
| 2165 | if (end > i_size_read(inode)) { |
| 2166 | *direct_io = 0; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2167 | break; |
| 2168 | } |
| 2169 | |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 2170 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2171 | * We don't fill holes during direct io, so |
| 2172 | * check for them here. If any are found, the |
| 2173 | * caller will have to retake some cluster |
| 2174 | * locks and initiate the io as buffered. |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 2175 | */ |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 2176 | ret = ocfs2_check_range_for_holes(inode, saved_pos, count); |
| 2177 | if (ret == 1) { |
| 2178 | *direct_io = 0; |
| 2179 | ret = 0; |
| 2180 | } else if (ret < 0) |
| 2181 | mlog_errno(ret); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2182 | break; |
| 2183 | } |
| 2184 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2185 | if (appending) |
| 2186 | *ppos = saved_pos; |
| 2187 | |
| 2188 | out_unlock: |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 2189 | if (meta_level >= 0) |
| 2190 | ocfs2_inode_unlock(inode, meta_level); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2191 | |
| 2192 | out: |
| 2193 | return ret; |
| 2194 | } |
| 2195 | |
| 2196 | static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, |
| 2197 | const struct iovec *iov, |
| 2198 | unsigned long nr_segs, |
| 2199 | loff_t pos) |
| 2200 | { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2201 | int ret, direct_io, appending, rw_level, have_alloc_sem = 0; |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2202 | int can_do_direct, has_refcount = 0; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2203 | ssize_t written = 0; |
| 2204 | size_t ocount; /* original count */ |
| 2205 | size_t count; /* after file limit checks */ |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2206 | loff_t old_size, *ppos = &iocb->ki_pos; |
| 2207 | u32 old_clusters; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2208 | struct file *file = iocb->ki_filp; |
| 2209 | struct inode *inode = file->f_path.dentry->d_inode; |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2210 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Tristan Ye | 7bdb0d1 | 2010-10-11 16:46:39 +0800 | [diff] [blame] | 2211 | int full_coherency = !(osb->s_mount_opt & |
| 2212 | OCFS2_MOUNT_COHERENCY_BUFFERED); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2213 | |
Tao Ma | ef6b689 | 2011-02-21 11:10:44 +0800 | [diff] [blame] | 2214 | mlog(0, "(0x%p, %u, '%.*s')\n", file, |
| 2215 | (unsigned int)nr_segs, |
| 2216 | file->f_path.dentry->d_name.len, |
| 2217 | file->f_path.dentry->d_name.name); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2218 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2219 | if (iocb->ki_left == 0) |
| 2220 | return 0; |
| 2221 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2222 | vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); |
| 2223 | |
| 2224 | appending = file->f_flags & O_APPEND ? 1 : 0; |
| 2225 | direct_io = file->f_flags & O_DIRECT ? 1 : 0; |
| 2226 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2227 | mutex_lock(&inode->i_mutex); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2228 | |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2229 | ocfs2_iocb_clear_sem_locked(iocb); |
| 2230 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2231 | relock: |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2232 | /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */ |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2233 | if (direct_io) { |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2234 | down_read(&inode->i_alloc_sem); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2235 | have_alloc_sem = 1; |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2236 | /* communicate with ocfs2_dio_end_io */ |
| 2237 | ocfs2_iocb_set_sem_locked(iocb); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2238 | } |
| 2239 | |
Tristan Ye | 7bdb0d1 | 2010-10-11 16:46:39 +0800 | [diff] [blame] | 2240 | /* |
| 2241 | * Concurrent O_DIRECT writes are allowed with |
| 2242 | * mount_option "coherency=buffered". |
| 2243 | */ |
| 2244 | rw_level = (!direct_io || full_coherency); |
| 2245 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2246 | ret = ocfs2_rw_lock(inode, rw_level); |
| 2247 | if (ret < 0) { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2248 | mlog_errno(ret); |
| 2249 | goto out_sems; |
| 2250 | } |
| 2251 | |
Tristan Ye | 7bdb0d1 | 2010-10-11 16:46:39 +0800 | [diff] [blame] | 2252 | /* |
| 2253 | * O_DIRECT writes with "coherency=full" need to take EX cluster |
| 2254 | * inode_lock to guarantee coherency. |
| 2255 | */ |
| 2256 | if (direct_io && full_coherency) { |
| 2257 | /* |
| 2258 | * We need to take and drop the inode lock to force |
| 2259 | * other nodes to drop their caches. Buffered I/O |
| 2260 | * already does this in write_begin(). |
| 2261 | */ |
| 2262 | ret = ocfs2_inode_lock(inode, NULL, 1); |
| 2263 | if (ret < 0) { |
| 2264 | mlog_errno(ret); |
| 2265 | goto out_sems; |
| 2266 | } |
| 2267 | |
| 2268 | ocfs2_inode_unlock(inode, 1); |
| 2269 | } |
| 2270 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2271 | can_do_direct = direct_io; |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2272 | ret = ocfs2_prepare_inode_for_write(file, ppos, |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2273 | iocb->ki_left, appending, |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2274 | &can_do_direct, &has_refcount); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2275 | if (ret < 0) { |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2276 | mlog_errno(ret); |
| 2277 | goto out; |
| 2278 | } |
| 2279 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2280 | /* |
| 2281 | * We can't complete the direct I/O as requested, fall back to |
| 2282 | * buffered I/O. |
| 2283 | */ |
| 2284 | if (direct_io && !can_do_direct) { |
| 2285 | ocfs2_rw_unlock(inode, rw_level); |
| 2286 | up_read(&inode->i_alloc_sem); |
| 2287 | |
| 2288 | have_alloc_sem = 0; |
| 2289 | rw_level = -1; |
| 2290 | |
| 2291 | direct_io = 0; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2292 | goto relock; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2293 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2294 | |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2295 | /* |
| 2296 | * To later detect whether a journal commit for sync writes is |
| 2297 | * necessary, we sample i_size, and cluster count here. |
| 2298 | */ |
| 2299 | old_size = i_size_read(inode); |
| 2300 | old_clusters = OCFS2_I(inode)->ip_clusters; |
| 2301 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2302 | /* communicate with ocfs2_dio_end_io */ |
Mark Fasheh | 7cdfc3a | 2007-04-16 17:28:51 -0700 | [diff] [blame] | 2303 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2304 | |
Li Dongyang | 6b933c8 | 2010-04-17 17:49:10 +0800 | [diff] [blame] | 2305 | ret = generic_segment_checks(iov, &nr_segs, &ocount, |
| 2306 | VERIFY_READ); |
| 2307 | if (ret) |
| 2308 | goto out_dio; |
| 2309 | |
| 2310 | count = ocount; |
| 2311 | ret = generic_write_checks(file, ppos, &count, |
| 2312 | S_ISBLK(inode->i_mode)); |
| 2313 | if (ret) |
| 2314 | goto out_dio; |
| 2315 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2316 | if (direct_io) { |
| 2317 | written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos, |
| 2318 | ppos, count, ocount); |
| 2319 | if (written < 0) { |
| 2320 | ret = written; |
| 2321 | goto out_dio; |
| 2322 | } |
| 2323 | } else { |
Li Dongyang | 6b933c8 | 2010-04-17 17:49:10 +0800 | [diff] [blame] | 2324 | current->backing_dev_info = file->f_mapping->backing_dev_info; |
| 2325 | written = generic_file_buffered_write(iocb, iov, nr_segs, *ppos, |
| 2326 | ppos, count, 0); |
| 2327 | current->backing_dev_info = NULL; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2328 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2329 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2330 | out_dio: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2331 | /* buffered aio wouldn't have proper lock coverage today */ |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2332 | BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2333 | |
Tao Ma | 60c4867 | 2010-02-03 09:56:04 +0800 | [diff] [blame] | 2334 | if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) || |
Tristan Ye | 81c8c82 | 2010-08-19 15:15:00 +0800 | [diff] [blame] | 2335 | ((file->f_flags & O_DIRECT) && !direct_io)) { |
Jan Kara | 918941a | 2009-08-17 18:50:08 +0200 | [diff] [blame] | 2336 | ret = filemap_fdatawrite_range(file->f_mapping, pos, |
| 2337 | pos + count - 1); |
| 2338 | if (ret < 0) |
| 2339 | written = ret; |
| 2340 | |
Coly Li | a03ab78 | 2010-03-26 05:15:12 +0800 | [diff] [blame] | 2341 | if (!ret && ((old_size != i_size_read(inode)) || |
| 2342 | (old_clusters != OCFS2_I(inode)->ip_clusters) || |
| 2343 | has_refcount)) { |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 2344 | ret = jbd2_journal_force_commit(osb->journal->j_journal); |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2345 | if (ret < 0) |
| 2346 | written = ret; |
| 2347 | } |
Jan Kara | 918941a | 2009-08-17 18:50:08 +0200 | [diff] [blame] | 2348 | |
| 2349 | if (!ret) |
| 2350 | ret = filemap_fdatawait_range(file->f_mapping, pos, |
| 2351 | pos + count - 1); |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2352 | } |
| 2353 | |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2354 | /* |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2355 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io |
| 2356 | * function pointer which is called when o_direct io completes so that |
| 2357 | * it can unlock our rw lock. (it's the clustered equivalent of |
| 2358 | * i_alloc_sem; protects truncate from racing with pending ios). |
| 2359 | * Unfortunately there are error cases which call end_io and others |
| 2360 | * that don't. so we don't have to unlock the rw_lock if either an |
| 2361 | * async dio is going to do it in the future or an end_io after an |
| 2362 | * error has already done it. |
| 2363 | */ |
Coly Li | 66b116c | 2010-02-25 14:57:13 +0800 | [diff] [blame] | 2364 | if ((ret == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2365 | rw_level = -1; |
| 2366 | have_alloc_sem = 0; |
| 2367 | } |
| 2368 | |
| 2369 | out: |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2370 | if (rw_level != -1) |
| 2371 | ocfs2_rw_unlock(inode, rw_level); |
| 2372 | |
| 2373 | out_sems: |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2374 | if (have_alloc_sem) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2375 | up_read(&inode->i_alloc_sem); |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2376 | ocfs2_iocb_clear_sem_locked(iocb); |
| 2377 | } |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2378 | |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 2379 | mutex_unlock(&inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2380 | |
Wengang Wang | 812e7a6 | 2009-07-10 13:26:04 +0800 | [diff] [blame] | 2381 | if (written) |
| 2382 | ret = written; |
Wengang Wang | 812e7a6 | 2009-07-10 13:26:04 +0800 | [diff] [blame] | 2383 | return ret; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2384 | } |
| 2385 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2386 | static int ocfs2_splice_to_file(struct pipe_inode_info *pipe, |
| 2387 | struct file *out, |
| 2388 | struct splice_desc *sd) |
| 2389 | { |
| 2390 | int ret; |
| 2391 | |
Tao Ma | b890823 | 2010-08-12 10:27:14 +0800 | [diff] [blame] | 2392 | ret = ocfs2_prepare_inode_for_write(out, &sd->pos, |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2393 | sd->total_len, 0, NULL, NULL); |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2394 | if (ret < 0) { |
| 2395 | mlog_errno(ret); |
| 2396 | return ret; |
| 2397 | } |
| 2398 | |
| 2399 | return splice_from_pipe_feed(pipe, sd, pipe_to_file); |
| 2400 | } |
| 2401 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2402 | static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, |
| 2403 | struct file *out, |
| 2404 | loff_t *ppos, |
| 2405 | size_t len, |
| 2406 | unsigned int flags) |
| 2407 | { |
| 2408 | int ret; |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2409 | struct address_space *mapping = out->f_mapping; |
| 2410 | struct inode *inode = mapping->host; |
| 2411 | struct splice_desc sd = { |
| 2412 | .total_len = len, |
| 2413 | .flags = flags, |
| 2414 | .pos = *ppos, |
| 2415 | .u.file = out, |
| 2416 | }; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2417 | |
Tao Ma | ef6b689 | 2011-02-21 11:10:44 +0800 | [diff] [blame] | 2418 | mlog(0, "(0x%p, 0x%p, %u, '%.*s')\n", out, pipe, |
| 2419 | (unsigned int)len, |
| 2420 | out->f_path.dentry->d_name.len, |
| 2421 | out->f_path.dentry->d_name.name); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2422 | |
Miklos Szeredi | 7bfac9e | 2009-04-06 17:41:00 +0200 | [diff] [blame] | 2423 | if (pipe->inode) |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2424 | mutex_lock_nested(&pipe->inode->i_mutex, I_MUTEX_PARENT); |
| 2425 | |
| 2426 | splice_from_pipe_begin(&sd); |
| 2427 | do { |
| 2428 | ret = splice_from_pipe_next(pipe, &sd); |
| 2429 | if (ret <= 0) |
| 2430 | break; |
| 2431 | |
| 2432 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); |
| 2433 | ret = ocfs2_rw_lock(inode, 1); |
| 2434 | if (ret < 0) |
| 2435 | mlog_errno(ret); |
| 2436 | else { |
| 2437 | ret = ocfs2_splice_to_file(pipe, out, &sd); |
| 2438 | ocfs2_rw_unlock(inode, 1); |
| 2439 | } |
| 2440 | mutex_unlock(&inode->i_mutex); |
| 2441 | } while (ret > 0); |
| 2442 | splice_from_pipe_end(pipe, &sd); |
| 2443 | |
Miklos Szeredi | 7bfac9e | 2009-04-06 17:41:00 +0200 | [diff] [blame] | 2444 | if (pipe->inode) |
| 2445 | mutex_unlock(&pipe->inode->i_mutex); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2446 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2447 | if (sd.num_spliced) |
| 2448 | ret = sd.num_spliced; |
| 2449 | |
| 2450 | if (ret > 0) { |
| 2451 | unsigned long nr_pages; |
Jan Kara | d23c937 | 2009-08-18 18:24:31 +0200 | [diff] [blame] | 2452 | int err; |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2453 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2454 | nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
| 2455 | |
Jan Kara | d23c937 | 2009-08-18 18:24:31 +0200 | [diff] [blame] | 2456 | err = generic_write_sync(out, *ppos, ret); |
| 2457 | if (err) |
| 2458 | ret = err; |
| 2459 | else |
| 2460 | *ppos += ret; |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2461 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2462 | balance_dirty_pages_ratelimited_nr(mapping, nr_pages); |
| 2463 | } |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2464 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2465 | return ret; |
| 2466 | } |
| 2467 | |
| 2468 | static ssize_t ocfs2_file_splice_read(struct file *in, |
| 2469 | loff_t *ppos, |
| 2470 | struct pipe_inode_info *pipe, |
| 2471 | size_t len, |
| 2472 | unsigned int flags) |
| 2473 | { |
Tao Ma | 1962f39 | 2009-06-19 15:36:52 +0800 | [diff] [blame] | 2474 | int ret = 0, lock_level = 0; |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2475 | struct inode *inode = in->f_path.dentry->d_inode; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2476 | |
Tao Ma | ef6b689 | 2011-02-21 11:10:44 +0800 | [diff] [blame] | 2477 | mlog(0, "(0x%p, 0x%p, %u, '%.*s')\n", in, pipe, |
| 2478 | (unsigned int)len, |
| 2479 | in->f_path.dentry->d_name.len, |
| 2480 | in->f_path.dentry->d_name.name); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2481 | |
| 2482 | /* |
| 2483 | * See the comment in ocfs2_file_aio_read() |
| 2484 | */ |
Tao Ma | 1962f39 | 2009-06-19 15:36:52 +0800 | [diff] [blame] | 2485 | ret = ocfs2_inode_lock_atime(inode, in->f_vfsmnt, &lock_level); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2486 | if (ret < 0) { |
| 2487 | mlog_errno(ret); |
| 2488 | goto bail; |
| 2489 | } |
Tao Ma | 1962f39 | 2009-06-19 15:36:52 +0800 | [diff] [blame] | 2490 | ocfs2_inode_unlock(inode, lock_level); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2491 | |
| 2492 | ret = generic_file_splice_read(in, ppos, pipe, len, flags); |
| 2493 | |
| 2494 | bail: |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2495 | return ret; |
| 2496 | } |
| 2497 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2498 | static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 2499 | const struct iovec *iov, |
| 2500 | unsigned long nr_segs, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2501 | loff_t pos) |
| 2502 | { |
Tiger Yang | 25899de | 2006-11-15 15:49:02 +0800 | [diff] [blame] | 2503 | 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] | 2504 | struct file *filp = iocb->ki_filp; |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2505 | struct inode *inode = filp->f_path.dentry->d_inode; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2506 | |
Tao Ma | ef6b689 | 2011-02-21 11:10:44 +0800 | [diff] [blame] | 2507 | mlog(0, "(0x%p, %u, '%.*s')\n", filp, |
| 2508 | (unsigned int)nr_segs, |
| 2509 | filp->f_path.dentry->d_name.len, |
| 2510 | filp->f_path.dentry->d_name.name); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2511 | |
| 2512 | if (!inode) { |
| 2513 | ret = -EINVAL; |
| 2514 | mlog_errno(ret); |
| 2515 | goto bail; |
| 2516 | } |
| 2517 | |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2518 | ocfs2_iocb_clear_sem_locked(iocb); |
| 2519 | |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2520 | /* |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2521 | * buffered reads protect themselves in ->readpage(). O_DIRECT reads |
| 2522 | * need locks to protect pending reads from racing with truncate. |
| 2523 | */ |
| 2524 | if (filp->f_flags & O_DIRECT) { |
| 2525 | down_read(&inode->i_alloc_sem); |
| 2526 | have_alloc_sem = 1; |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2527 | ocfs2_iocb_set_sem_locked(iocb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2528 | |
| 2529 | ret = ocfs2_rw_lock(inode, 0); |
| 2530 | if (ret < 0) { |
| 2531 | mlog_errno(ret); |
| 2532 | goto bail; |
| 2533 | } |
| 2534 | rw_level = 0; |
| 2535 | /* communicate with ocfs2_dio_end_io */ |
Mark Fasheh | 7cdfc3a | 2007-04-16 17:28:51 -0700 | [diff] [blame] | 2536 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2537 | } |
| 2538 | |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2539 | /* |
| 2540 | * We're fine letting folks race truncates and extending |
| 2541 | * writes with read across the cluster, just like they can |
| 2542 | * locally. Hence no rw_lock during read. |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2543 | * |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2544 | * Take and drop the meta data lock to update inode fields |
| 2545 | * like i_size. This allows the checks down below |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2546 | * generic_file_aio_read() a chance of actually working. |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2547 | */ |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 2548 | ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level); |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2549 | if (ret < 0) { |
| 2550 | mlog_errno(ret); |
| 2551 | goto bail; |
| 2552 | } |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 2553 | ocfs2_inode_unlock(inode, lock_level); |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2554 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 2555 | ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2556 | if (ret == -EINVAL) |
Sunil Mushran | 56753bd | 2008-06-09 11:24:41 -0700 | [diff] [blame] | 2557 | mlog(0, "generic_file_aio_read returned -EINVAL\n"); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2558 | |
| 2559 | /* buffered aio wouldn't have proper lock coverage today */ |
| 2560 | BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT)); |
| 2561 | |
| 2562 | /* see ocfs2_file_aio_write */ |
| 2563 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { |
| 2564 | rw_level = -1; |
| 2565 | have_alloc_sem = 0; |
| 2566 | } |
| 2567 | |
| 2568 | bail: |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2569 | if (have_alloc_sem) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2570 | up_read(&inode->i_alloc_sem); |
Tristan Ye | 39c99f1 | 2010-12-07 14:35:07 +0800 | [diff] [blame] | 2571 | ocfs2_iocb_clear_sem_locked(iocb); |
| 2572 | } |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2573 | if (rw_level != -1) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2574 | ocfs2_rw_unlock(inode, rw_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2575 | |
| 2576 | return ret; |
| 2577 | } |
| 2578 | |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 2579 | const struct inode_operations ocfs2_file_iops = { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2580 | .setattr = ocfs2_setattr, |
| 2581 | .getattr = ocfs2_getattr, |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 2582 | .permission = ocfs2_permission, |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2583 | .setxattr = generic_setxattr, |
| 2584 | .getxattr = generic_getxattr, |
| 2585 | .listxattr = ocfs2_listxattr, |
| 2586 | .removexattr = generic_removexattr, |
Mark Fasheh | 00dc417 | 2008-10-03 17:32:11 -0400 | [diff] [blame] | 2587 | .fiemap = ocfs2_fiemap, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2588 | }; |
| 2589 | |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 2590 | const struct inode_operations ocfs2_special_file_iops = { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2591 | .setattr = ocfs2_setattr, |
| 2592 | .getattr = ocfs2_getattr, |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 2593 | .permission = ocfs2_permission, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2594 | }; |
| 2595 | |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2596 | /* |
| 2597 | * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with |
| 2598 | * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks! |
| 2599 | */ |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 2600 | const struct file_operations ocfs2_fops = { |
Jan Kara | 32c3c0e | 2007-12-19 15:24:52 +0100 | [diff] [blame] | 2601 | .llseek = generic_file_llseek, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2602 | .read = do_sync_read, |
| 2603 | .write = do_sync_write, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2604 | .mmap = ocfs2_mmap, |
| 2605 | .fsync = ocfs2_sync_file, |
| 2606 | .release = ocfs2_file_release, |
| 2607 | .open = ocfs2_file_open, |
| 2608 | .aio_read = ocfs2_file_aio_read, |
| 2609 | .aio_write = ocfs2_file_aio_write, |
Andi Kleen | c9ec148 | 2008-01-27 03:17:17 +0100 | [diff] [blame] | 2610 | .unlocked_ioctl = ocfs2_ioctl, |
Mark Fasheh | 586d232 | 2007-03-09 15:56:28 -0800 | [diff] [blame] | 2611 | #ifdef CONFIG_COMPAT |
| 2612 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2613 | #endif |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2614 | .lock = ocfs2_lock, |
| 2615 | .flock = ocfs2_flock, |
| 2616 | .splice_read = ocfs2_file_splice_read, |
| 2617 | .splice_write = ocfs2_file_splice_write, |
Christoph Hellwig | 2fe17c1 | 2011-01-14 13:07:43 +0100 | [diff] [blame] | 2618 | .fallocate = ocfs2_fallocate, |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2619 | }; |
| 2620 | |
| 2621 | const struct file_operations ocfs2_dops = { |
| 2622 | .llseek = generic_file_llseek, |
| 2623 | .read = generic_read_dir, |
| 2624 | .readdir = ocfs2_readdir, |
| 2625 | .fsync = ocfs2_sync_file, |
| 2626 | .release = ocfs2_dir_release, |
| 2627 | .open = ocfs2_dir_open, |
| 2628 | .unlocked_ioctl = ocfs2_ioctl, |
| 2629 | #ifdef CONFIG_COMPAT |
| 2630 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2631 | #endif |
| 2632 | .lock = ocfs2_lock, |
| 2633 | .flock = ocfs2_flock, |
| 2634 | }; |
| 2635 | |
| 2636 | /* |
| 2637 | * POSIX-lockless variants of our file_operations. |
| 2638 | * |
| 2639 | * These will be used if the underlying cluster stack does not support |
| 2640 | * posix file locking, if the user passes the "localflocks" mount |
| 2641 | * option, or if we have a local-only fs. |
| 2642 | * |
| 2643 | * ocfs2_flock is in here because all stacks handle UNIX file locks, |
| 2644 | * so we still want it in the case of no stack support for |
| 2645 | * plocks. Internally, it will do the right thing when asked to ignore |
| 2646 | * the cluster. |
| 2647 | */ |
| 2648 | const struct file_operations ocfs2_fops_no_plocks = { |
| 2649 | .llseek = generic_file_llseek, |
| 2650 | .read = do_sync_read, |
| 2651 | .write = do_sync_write, |
| 2652 | .mmap = ocfs2_mmap, |
| 2653 | .fsync = ocfs2_sync_file, |
| 2654 | .release = ocfs2_file_release, |
| 2655 | .open = ocfs2_file_open, |
| 2656 | .aio_read = ocfs2_file_aio_read, |
| 2657 | .aio_write = ocfs2_file_aio_write, |
| 2658 | .unlocked_ioctl = ocfs2_ioctl, |
| 2659 | #ifdef CONFIG_COMPAT |
| 2660 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2661 | #endif |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 2662 | .flock = ocfs2_flock, |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2663 | .splice_read = ocfs2_file_splice_read, |
| 2664 | .splice_write = ocfs2_file_splice_write, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2665 | }; |
| 2666 | |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2667 | const struct file_operations ocfs2_dops_no_plocks = { |
Jan Kara | 32c3c0e | 2007-12-19 15:24:52 +0100 | [diff] [blame] | 2668 | .llseek = generic_file_llseek, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2669 | .read = generic_read_dir, |
| 2670 | .readdir = ocfs2_readdir, |
| 2671 | .fsync = ocfs2_sync_file, |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 2672 | .release = ocfs2_dir_release, |
| 2673 | .open = ocfs2_dir_open, |
Andi Kleen | c9ec148 | 2008-01-27 03:17:17 +0100 | [diff] [blame] | 2674 | .unlocked_ioctl = ocfs2_ioctl, |
Mark Fasheh | 586d232 | 2007-03-09 15:56:28 -0800 | [diff] [blame] | 2675 | #ifdef CONFIG_COMPAT |
| 2676 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2677 | #endif |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 2678 | .flock = ocfs2_flock, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2679 | }; |