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> |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 39 | |
| 40 | #define MLOG_MASK_PREFIX ML_INODE |
| 41 | #include <cluster/masklog.h> |
| 42 | |
| 43 | #include "ocfs2.h" |
| 44 | |
| 45 | #include "alloc.h" |
| 46 | #include "aops.h" |
| 47 | #include "dir.h" |
| 48 | #include "dlmglue.h" |
| 49 | #include "extent_map.h" |
| 50 | #include "file.h" |
| 51 | #include "sysfile.h" |
| 52 | #include "inode.h" |
Herbert Poetzl | ca4d147 | 2006-07-03 17:27:12 -0700 | [diff] [blame] | 53 | #include "ioctl.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 54 | #include "journal.h" |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 55 | #include "locks.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 56 | #include "mmap.h" |
| 57 | #include "suballoc.h" |
| 58 | #include "super.h" |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 59 | #include "xattr.h" |
Tiger Yang | 23fc270 | 2008-11-14 11:17:18 +0800 | [diff] [blame] | 60 | #include "acl.h" |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 61 | #include "quota.h" |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 62 | #include "refcounttree.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 63 | |
| 64 | #include "buffer_head_io.h" |
| 65 | |
| 66 | static int ocfs2_sync_inode(struct inode *inode) |
| 67 | { |
| 68 | filemap_fdatawrite(inode->i_mapping); |
| 69 | return sync_mapping_buffers(inode->i_mapping); |
| 70 | } |
| 71 | |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 72 | static int ocfs2_init_file_private(struct inode *inode, struct file *file) |
| 73 | { |
| 74 | struct ocfs2_file_private *fp; |
| 75 | |
| 76 | fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL); |
| 77 | if (!fp) |
| 78 | return -ENOMEM; |
| 79 | |
| 80 | fp->fp_file = file; |
| 81 | mutex_init(&fp->fp_mutex); |
| 82 | ocfs2_file_lock_res_init(&fp->fp_flock, fp); |
| 83 | file->private_data = fp; |
| 84 | |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | static void ocfs2_free_file_private(struct inode *inode, struct file *file) |
| 89 | { |
| 90 | struct ocfs2_file_private *fp = file->private_data; |
| 91 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 92 | |
| 93 | if (fp) { |
| 94 | ocfs2_simple_drop_lockres(osb, &fp->fp_flock); |
| 95 | ocfs2_lock_res_free(&fp->fp_flock); |
| 96 | kfree(fp); |
| 97 | file->private_data = NULL; |
| 98 | } |
| 99 | } |
| 100 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 101 | static int ocfs2_file_open(struct inode *inode, struct file *file) |
| 102 | { |
| 103 | int status; |
| 104 | int mode = file->f_flags; |
| 105 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 106 | |
| 107 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 108 | 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] | 109 | |
| 110 | spin_lock(&oi->ip_lock); |
| 111 | |
| 112 | /* Check that the inode hasn't been wiped from disk by another |
| 113 | * node. If it hasn't then we're safe as long as we hold the |
| 114 | * spin lock until our increment of open count. */ |
| 115 | if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { |
| 116 | spin_unlock(&oi->ip_lock); |
| 117 | |
| 118 | status = -ENOENT; |
| 119 | goto leave; |
| 120 | } |
| 121 | |
| 122 | if (mode & O_DIRECT) |
| 123 | oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT; |
| 124 | |
| 125 | oi->ip_open_count++; |
| 126 | spin_unlock(&oi->ip_lock); |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 127 | |
| 128 | status = ocfs2_init_file_private(inode, file); |
| 129 | if (status) { |
| 130 | /* |
| 131 | * We want to set open count back if we're failing the |
| 132 | * open. |
| 133 | */ |
| 134 | spin_lock(&oi->ip_lock); |
| 135 | oi->ip_open_count--; |
| 136 | spin_unlock(&oi->ip_lock); |
| 137 | } |
| 138 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 139 | leave: |
| 140 | mlog_exit(status); |
| 141 | return status; |
| 142 | } |
| 143 | |
| 144 | static int ocfs2_file_release(struct inode *inode, struct file *file) |
| 145 | { |
| 146 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 147 | |
| 148 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 149 | file->f_path.dentry->d_name.len, |
| 150 | file->f_path.dentry->d_name.name); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 151 | |
| 152 | spin_lock(&oi->ip_lock); |
| 153 | if (!--oi->ip_open_count) |
| 154 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; |
| 155 | spin_unlock(&oi->ip_lock); |
| 156 | |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 157 | ocfs2_free_file_private(inode, file); |
| 158 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 159 | mlog_exit(0); |
| 160 | |
| 161 | return 0; |
| 162 | } |
| 163 | |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 164 | static int ocfs2_dir_open(struct inode *inode, struct file *file) |
| 165 | { |
| 166 | return ocfs2_init_file_private(inode, file); |
| 167 | } |
| 168 | |
| 169 | static int ocfs2_dir_release(struct inode *inode, struct file *file) |
| 170 | { |
| 171 | ocfs2_free_file_private(inode, file); |
| 172 | return 0; |
| 173 | } |
| 174 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 175 | static int ocfs2_sync_file(struct file *file, |
| 176 | struct dentry *dentry, |
| 177 | int datasync) |
| 178 | { |
| 179 | int err = 0; |
| 180 | journal_t *journal; |
| 181 | struct inode *inode = dentry->d_inode; |
| 182 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 183 | |
| 184 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", file, dentry, datasync, |
| 185 | dentry->d_name.len, dentry->d_name.name); |
| 186 | |
| 187 | err = ocfs2_sync_inode(dentry->d_inode); |
| 188 | if (err) |
| 189 | goto bail; |
| 190 | |
Hisashi Hifumi | e04cc15 | 2009-06-09 16:47:45 +0900 | [diff] [blame] | 191 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) |
| 192 | goto bail; |
| 193 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 194 | journal = osb->journal->j_journal; |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 195 | err = jbd2_journal_force_commit(journal); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 196 | |
| 197 | bail: |
| 198 | mlog_exit(err); |
| 199 | |
| 200 | return (err < 0) ? -EIO : 0; |
| 201 | } |
| 202 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 203 | int ocfs2_should_update_atime(struct inode *inode, |
| 204 | struct vfsmount *vfsmnt) |
| 205 | { |
| 206 | struct timespec now; |
| 207 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 208 | |
| 209 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
| 210 | return 0; |
| 211 | |
| 212 | if ((inode->i_flags & S_NOATIME) || |
| 213 | ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))) |
| 214 | return 0; |
| 215 | |
Mark Fasheh | 6c2aad0 | 2006-12-19 15:25:52 -0800 | [diff] [blame] | 216 | /* |
| 217 | * We can be called with no vfsmnt structure - NFSD will |
| 218 | * sometimes do this. |
| 219 | * |
| 220 | * Note that our action here is different than touch_atime() - |
| 221 | * if we can't tell whether this is a noatime mount, then we |
| 222 | * don't know whether to trust the value of s_atime_quantum. |
| 223 | */ |
| 224 | if (vfsmnt == NULL) |
| 225 | return 0; |
| 226 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 227 | if ((vfsmnt->mnt_flags & MNT_NOATIME) || |
| 228 | ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
| 229 | return 0; |
| 230 | |
Mark Fasheh | 7e913c5 | 2006-12-13 00:34:35 -0800 | [diff] [blame] | 231 | if (vfsmnt->mnt_flags & MNT_RELATIME) { |
| 232 | if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) || |
| 233 | (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0)) |
| 234 | return 1; |
| 235 | |
| 236 | return 0; |
| 237 | } |
| 238 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 239 | now = CURRENT_TIME; |
| 240 | if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum)) |
| 241 | return 0; |
| 242 | else |
| 243 | return 1; |
| 244 | } |
| 245 | |
| 246 | int ocfs2_update_inode_atime(struct inode *inode, |
| 247 | struct buffer_head *bh) |
| 248 | { |
| 249 | int ret; |
| 250 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 251 | handle_t *handle; |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 252 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data; |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 253 | |
| 254 | mlog_entry_void(); |
| 255 | |
| 256 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 257 | if (IS_ERR(handle)) { |
| 258 | ret = PTR_ERR(handle); |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 259 | mlog_errno(ret); |
| 260 | goto out; |
| 261 | } |
| 262 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 263 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 264 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 265 | if (ret) { |
| 266 | mlog_errno(ret); |
| 267 | goto out_commit; |
| 268 | } |
| 269 | |
| 270 | /* |
| 271 | * Don't use ocfs2_mark_inode_dirty() here as we don't always |
| 272 | * have i_mutex to guard against concurrent changes to other |
| 273 | * inode fields. |
| 274 | */ |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 275 | inode->i_atime = CURRENT_TIME; |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 276 | di->i_atime = cpu_to_le64(inode->i_atime.tv_sec); |
| 277 | di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); |
| 278 | |
| 279 | ret = ocfs2_journal_dirty(handle, bh); |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 280 | if (ret < 0) |
| 281 | mlog_errno(ret); |
| 282 | |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 283 | out_commit: |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 284 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
| 285 | out: |
| 286 | mlog_exit(ret); |
| 287 | return ret; |
| 288 | } |
| 289 | |
Adrian Bunk | 6cb129f | 2007-04-26 00:29:35 -0700 | [diff] [blame] | 290 | static int ocfs2_set_inode_size(handle_t *handle, |
| 291 | struct inode *inode, |
| 292 | struct buffer_head *fe_bh, |
| 293 | u64 new_i_size) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 294 | { |
| 295 | int status; |
| 296 | |
| 297 | mlog_entry_void(); |
| 298 | i_size_write(inode, new_i_size); |
Mark Fasheh | 8110b07 | 2007-03-22 16:53:23 -0700 | [diff] [blame] | 299 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 300 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 301 | |
| 302 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); |
| 303 | if (status < 0) { |
| 304 | mlog_errno(status); |
| 305 | goto bail; |
| 306 | } |
| 307 | |
| 308 | bail: |
| 309 | mlog_exit(status); |
| 310 | return status; |
| 311 | } |
| 312 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 313 | int ocfs2_simple_size_update(struct inode *inode, |
| 314 | struct buffer_head *di_bh, |
| 315 | u64 new_i_size) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 316 | { |
| 317 | int ret; |
| 318 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 319 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 320 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 321 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 322 | if (IS_ERR(handle)) { |
| 323 | ret = PTR_ERR(handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 324 | mlog_errno(ret); |
| 325 | goto out; |
| 326 | } |
| 327 | |
| 328 | ret = ocfs2_set_inode_size(handle, inode, di_bh, |
| 329 | new_i_size); |
| 330 | if (ret < 0) |
| 331 | mlog_errno(ret); |
| 332 | |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 333 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 334 | out: |
| 335 | return ret; |
| 336 | } |
| 337 | |
Tao Ma | 37f8a2b | 2009-08-26 09:47:28 +0800 | [diff] [blame] | 338 | static int ocfs2_cow_file_pos(struct inode *inode, |
| 339 | struct buffer_head *fe_bh, |
| 340 | u64 offset) |
| 341 | { |
| 342 | int status; |
| 343 | u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 344 | unsigned int num_clusters = 0; |
| 345 | unsigned int ext_flags = 0; |
| 346 | |
| 347 | /* |
| 348 | * If the new offset is aligned to the range of the cluster, there is |
| 349 | * no space for ocfs2_zero_range_for_truncate to fill, so no need to |
| 350 | * CoW either. |
| 351 | */ |
| 352 | if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0) |
| 353 | return 0; |
| 354 | |
| 355 | status = ocfs2_get_clusters(inode, cpos, &phys, |
| 356 | &num_clusters, &ext_flags); |
| 357 | if (status) { |
| 358 | mlog_errno(status); |
| 359 | goto out; |
| 360 | } |
| 361 | |
| 362 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) |
| 363 | goto out; |
| 364 | |
| 365 | return ocfs2_refcount_cow(inode, fe_bh, cpos, 1, cpos+1); |
| 366 | |
| 367 | out: |
| 368 | return status; |
| 369 | } |
| 370 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 371 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, |
| 372 | struct inode *inode, |
| 373 | struct buffer_head *fe_bh, |
| 374 | u64 new_i_size) |
| 375 | { |
| 376 | int status; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 377 | handle_t *handle; |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 378 | struct ocfs2_dinode *di; |
Mark Fasheh | 35edec1 | 2007-07-06 14:41:18 -0700 | [diff] [blame] | 379 | u64 cluster_bytes; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 380 | |
| 381 | mlog_entry_void(); |
| 382 | |
Tao Ma | 37f8a2b | 2009-08-26 09:47:28 +0800 | [diff] [blame] | 383 | /* |
| 384 | * We need to CoW the cluster contains the offset if it is reflinked |
| 385 | * since we will call ocfs2_zero_range_for_truncate later which will |
| 386 | * write "0" from offset to the end of the cluster. |
| 387 | */ |
| 388 | status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size); |
| 389 | if (status) { |
| 390 | mlog_errno(status); |
| 391 | return status; |
| 392 | } |
| 393 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 394 | /* TODO: This needs to actually orphan the inode in this |
| 395 | * transaction. */ |
| 396 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 397 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 398 | if (IS_ERR(handle)) { |
| 399 | status = PTR_ERR(handle); |
| 400 | mlog_errno(status); |
| 401 | goto out; |
| 402 | } |
| 403 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 404 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 405 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 406 | if (status < 0) { |
| 407 | mlog_errno(status); |
| 408 | goto out_commit; |
| 409 | } |
| 410 | |
| 411 | /* |
| 412 | * Do this before setting i_size. |
| 413 | */ |
Mark Fasheh | 35edec1 | 2007-07-06 14:41:18 -0700 | [diff] [blame] | 414 | cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size); |
| 415 | status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size, |
| 416 | cluster_bytes); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 417 | if (status) { |
| 418 | mlog_errno(status); |
| 419 | goto out_commit; |
| 420 | } |
| 421 | |
| 422 | i_size_write(inode, new_i_size); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 423 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 424 | |
| 425 | di = (struct ocfs2_dinode *) fe_bh->b_data; |
| 426 | di->i_size = cpu_to_le64(new_i_size); |
| 427 | di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec); |
| 428 | di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
| 429 | |
| 430 | status = ocfs2_journal_dirty(handle, fe_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 431 | if (status < 0) |
| 432 | mlog_errno(status); |
| 433 | |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 434 | out_commit: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 435 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 436 | out: |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 437 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 438 | mlog_exit(status); |
| 439 | return status; |
| 440 | } |
| 441 | |
| 442 | static int ocfs2_truncate_file(struct inode *inode, |
| 443 | struct buffer_head *di_bh, |
| 444 | u64 new_i_size) |
| 445 | { |
| 446 | int status = 0; |
| 447 | struct ocfs2_dinode *fe = NULL; |
| 448 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 449 | struct ocfs2_truncate_context *tc = NULL; |
| 450 | |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 451 | mlog_entry("(inode = %llu, new_i_size = %llu\n", |
| 452 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 453 | (unsigned long long)new_i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 454 | |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 455 | /* We trust di_bh because it comes from ocfs2_inode_lock(), which |
| 456 | * already validated it */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 457 | fe = (struct ocfs2_dinode *) di_bh->b_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 458 | |
| 459 | 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] | 460 | "Inode %llu, inode i_size = %lld != di " |
| 461 | "i_size = %llu, i_flags = 0x%x\n", |
| 462 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 463 | i_size_read(inode), |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 464 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 465 | le32_to_cpu(fe->i_flags)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 466 | |
| 467 | if (new_i_size > le64_to_cpu(fe->i_size)) { |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 468 | mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n", |
| 469 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 470 | (unsigned long long)new_i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 471 | status = -EINVAL; |
| 472 | mlog_errno(status); |
| 473 | goto bail; |
| 474 | } |
| 475 | |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 476 | mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n", |
| 477 | (unsigned long long)le64_to_cpu(fe->i_blkno), |
| 478 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 479 | (unsigned long long)new_i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 480 | |
| 481 | /* lets handle the simple truncate cases before doing any more |
| 482 | * cluster locking. */ |
| 483 | if (new_i_size == le64_to_cpu(fe->i_size)) |
| 484 | goto bail; |
| 485 | |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 486 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 487 | |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 488 | /* |
| 489 | * The inode lock forced other nodes to sync and drop their |
| 490 | * pages, which (correctly) happens even if we have a truncate |
| 491 | * without allocation change - ocfs2 cluster sizes can be much |
| 492 | * greater than page size, so we have to truncate them |
| 493 | * anyway. |
| 494 | */ |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 495 | unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); |
| 496 | truncate_inode_pages(inode->i_mapping, new_i_size); |
| 497 | |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 498 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 499 | status = ocfs2_truncate_inline(inode, di_bh, new_i_size, |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 500 | i_size_read(inode), 1); |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 501 | if (status) |
| 502 | mlog_errno(status); |
| 503 | |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 504 | goto bail_unlock_sem; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 505 | } |
| 506 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 507 | /* alright, we're going to need to do a full blown alloc size |
| 508 | * change. Orphan the inode so that recovery can complete the |
| 509 | * truncate if necessary. This does the task of marking |
| 510 | * i_size. */ |
| 511 | status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); |
| 512 | if (status < 0) { |
| 513 | mlog_errno(status); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 514 | goto bail_unlock_sem; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 515 | } |
| 516 | |
| 517 | status = ocfs2_prepare_truncate(osb, inode, di_bh, &tc); |
| 518 | if (status < 0) { |
| 519 | mlog_errno(status); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 520 | goto bail_unlock_sem; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 521 | } |
| 522 | |
| 523 | status = ocfs2_commit_truncate(osb, inode, di_bh, tc); |
| 524 | if (status < 0) { |
| 525 | mlog_errno(status); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 526 | goto bail_unlock_sem; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 527 | } |
| 528 | |
| 529 | /* TODO: orphan dir cleanup here. */ |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 530 | bail_unlock_sem: |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 531 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 532 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 533 | bail: |
Tao Ma | 8b2c0db | 2009-08-18 11:43:49 +0800 | [diff] [blame] | 534 | if (!status && OCFS2_I(inode)->ip_clusters == 0) |
| 535 | status = ocfs2_try_remove_refcount_tree(inode, di_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 536 | |
| 537 | mlog_exit(status); |
| 538 | return status; |
| 539 | } |
| 540 | |
| 541 | /* |
Tao Ma | 0eb8d47 | 2008-08-18 17:38:45 +0800 | [diff] [blame] | 542 | * extend file allocation only here. |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 543 | * we'll update all the disk stuff, and oip->alloc_size |
| 544 | * |
| 545 | * expect stuff to be locked, a transaction started and enough data / |
| 546 | * metadata reservations in the contexts. |
| 547 | * |
| 548 | * Will return -EAGAIN, and a reason if a restart is needed. |
| 549 | * If passed in, *reason will always be set, even in error. |
| 550 | */ |
Tao Ma | 0eb8d47 | 2008-08-18 17:38:45 +0800 | [diff] [blame] | 551 | int ocfs2_add_inode_data(struct ocfs2_super *osb, |
| 552 | struct inode *inode, |
| 553 | u32 *logical_offset, |
| 554 | u32 clusters_to_add, |
| 555 | int mark_unwritten, |
| 556 | struct buffer_head *fe_bh, |
| 557 | handle_t *handle, |
| 558 | struct ocfs2_alloc_context *data_ac, |
| 559 | struct ocfs2_alloc_context *meta_ac, |
| 560 | enum ocfs2_alloc_restarted *reason_ret) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 561 | { |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 562 | int ret; |
| 563 | struct ocfs2_extent_tree et; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 564 | |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 565 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh); |
Joel Becker | cbee7e1 | 2009-02-13 03:34:15 -0800 | [diff] [blame] | 566 | ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset, |
| 567 | clusters_to_add, mark_unwritten, |
| 568 | data_ac, meta_ac, reason_ret); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 569 | |
| 570 | return ret; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 571 | } |
| 572 | |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 573 | static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start, |
| 574 | u32 clusters_to_add, int mark_unwritten) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 575 | { |
| 576 | int status = 0; |
| 577 | int restart_func = 0; |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 578 | int credits; |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 579 | u32 prev_clusters; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 580 | struct buffer_head *bh = NULL; |
| 581 | struct ocfs2_dinode *fe = NULL; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 582 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 583 | struct ocfs2_alloc_context *data_ac = NULL; |
| 584 | struct ocfs2_alloc_context *meta_ac = NULL; |
| 585 | enum ocfs2_alloc_restarted why; |
| 586 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 587 | struct ocfs2_extent_tree et; |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 588 | int did_quota = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 589 | |
| 590 | mlog_entry("(clusters_to_add = %u)\n", clusters_to_add); |
| 591 | |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 592 | /* |
| 593 | * This function only exists for file systems which don't |
| 594 | * support holes. |
| 595 | */ |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 596 | BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb)); |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 597 | |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 598 | status = ocfs2_read_inode_block(inode, &bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 599 | if (status < 0) { |
| 600 | mlog_errno(status); |
| 601 | goto leave; |
| 602 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 603 | fe = (struct ocfs2_dinode *) bh->b_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 604 | |
| 605 | restart_all: |
| 606 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); |
| 607 | |
Tao Ma | e7d4cb6 | 2008-08-18 17:38:44 +0800 | [diff] [blame] | 608 | mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, " |
| 609 | "clusters_to_add = %u\n", |
| 610 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 611 | (long long)i_size_read(inode), le32_to_cpu(fe->i_clusters), |
| 612 | clusters_to_add); |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 613 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh); |
Joel Becker | f99b9b7 | 2008-08-20 19:36:33 -0700 | [diff] [blame] | 614 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
| 615 | &data_ac, &meta_ac); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 616 | if (status) { |
| 617 | mlog_errno(status); |
| 618 | goto leave; |
| 619 | } |
| 620 | |
Tao Ma | 811f933 | 2008-08-18 17:38:43 +0800 | [diff] [blame] | 621 | credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list, |
| 622 | clusters_to_add); |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 623 | handle = ocfs2_start_trans(osb, credits); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 624 | if (IS_ERR(handle)) { |
| 625 | status = PTR_ERR(handle); |
| 626 | handle = NULL; |
| 627 | mlog_errno(status); |
| 628 | goto leave; |
| 629 | } |
| 630 | |
| 631 | restarted_transaction: |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 632 | if (vfs_dq_alloc_space_nodirty(inode, ocfs2_clusters_to_bytes(osb->sb, |
| 633 | clusters_to_add))) { |
| 634 | status = -EDQUOT; |
| 635 | goto leave; |
| 636 | } |
| 637 | did_quota = 1; |
| 638 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 639 | /* reserve a write to the file entry early on - that we if we |
| 640 | * run out of credits in the allocation path, we can still |
| 641 | * update i_size. */ |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 642 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 643 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 644 | if (status < 0) { |
| 645 | mlog_errno(status); |
| 646 | goto leave; |
| 647 | } |
| 648 | |
| 649 | prev_clusters = OCFS2_I(inode)->ip_clusters; |
| 650 | |
Tao Ma | 0eb8d47 | 2008-08-18 17:38:45 +0800 | [diff] [blame] | 651 | status = ocfs2_add_inode_data(osb, |
| 652 | inode, |
| 653 | &logical_start, |
| 654 | clusters_to_add, |
| 655 | mark_unwritten, |
| 656 | bh, |
| 657 | handle, |
| 658 | data_ac, |
| 659 | meta_ac, |
| 660 | &why); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 661 | if ((status < 0) && (status != -EAGAIN)) { |
| 662 | if (status != -ENOSPC) |
| 663 | mlog_errno(status); |
| 664 | goto leave; |
| 665 | } |
| 666 | |
| 667 | status = ocfs2_journal_dirty(handle, bh); |
| 668 | if (status < 0) { |
| 669 | mlog_errno(status); |
| 670 | goto leave; |
| 671 | } |
| 672 | |
| 673 | spin_lock(&OCFS2_I(inode)->ip_lock); |
| 674 | clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters); |
| 675 | spin_unlock(&OCFS2_I(inode)->ip_lock); |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 676 | /* Release unused quota reservation */ |
| 677 | vfs_dq_free_space(inode, |
| 678 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
| 679 | did_quota = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 680 | |
| 681 | if (why != RESTART_NONE && clusters_to_add) { |
| 682 | if (why == RESTART_META) { |
| 683 | mlog(0, "restarting function.\n"); |
| 684 | restart_func = 1; |
| 685 | } else { |
| 686 | BUG_ON(why != RESTART_TRANS); |
| 687 | |
| 688 | mlog(0, "restarting transaction.\n"); |
| 689 | /* TODO: This can be more intelligent. */ |
| 690 | credits = ocfs2_calc_extend_credits(osb->sb, |
Tao Ma | 811f933 | 2008-08-18 17:38:43 +0800 | [diff] [blame] | 691 | &fe->id2.i_list, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 692 | clusters_to_add); |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 693 | status = ocfs2_extend_trans(handle, credits); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 694 | if (status < 0) { |
| 695 | /* handle still has to be committed at |
| 696 | * this point. */ |
| 697 | status = -ENOMEM; |
| 698 | mlog_errno(status); |
| 699 | goto leave; |
| 700 | } |
| 701 | goto restarted_transaction; |
| 702 | } |
| 703 | } |
| 704 | |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 705 | mlog(0, "fe: i_clusters = %u, i_size=%llu\n", |
Mark Fasheh | 1ca1a11 | 2007-04-27 16:01:25 -0700 | [diff] [blame] | 706 | le32_to_cpu(fe->i_clusters), |
| 707 | (unsigned long long)le64_to_cpu(fe->i_size)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 708 | mlog(0, "inode: ip_clusters=%u, i_size=%lld\n", |
Jan Kara | 634bf74 | 2007-12-19 15:25:42 +0100 | [diff] [blame] | 709 | OCFS2_I(inode)->ip_clusters, (long long)i_size_read(inode)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 710 | |
| 711 | leave: |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 712 | if (status < 0 && did_quota) |
| 713 | vfs_dq_free_space(inode, |
| 714 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 715 | if (handle) { |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 716 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 717 | handle = NULL; |
| 718 | } |
| 719 | if (data_ac) { |
| 720 | ocfs2_free_alloc_context(data_ac); |
| 721 | data_ac = NULL; |
| 722 | } |
| 723 | if (meta_ac) { |
| 724 | ocfs2_free_alloc_context(meta_ac); |
| 725 | meta_ac = NULL; |
| 726 | } |
| 727 | if ((!status) && restart_func) { |
| 728 | restart_func = 0; |
| 729 | goto restart_all; |
| 730 | } |
Mark Fasheh | a81cb88 | 2008-10-07 14:25:16 -0700 | [diff] [blame] | 731 | brelse(bh); |
| 732 | bh = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 733 | |
| 734 | mlog_exit(status); |
| 735 | return status; |
| 736 | } |
| 737 | |
| 738 | /* Some parts of this taken from generic_cont_expand, which turned out |
| 739 | * 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] | 740 | * worry about recursive locking in ->write_begin() and ->write_end(). */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 741 | static int ocfs2_write_zero_page(struct inode *inode, |
| 742 | u64 size) |
| 743 | { |
| 744 | struct address_space *mapping = inode->i_mapping; |
| 745 | struct page *page; |
| 746 | unsigned long index; |
| 747 | unsigned int offset; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 748 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 749 | int ret; |
| 750 | |
| 751 | offset = (size & (PAGE_CACHE_SIZE-1)); /* Within page */ |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 752 | /* ugh. in prepare/commit_write, if from==to==start of block, we |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 753 | ** skip the prepare. make sure we never send an offset for the start |
| 754 | ** of a block |
| 755 | */ |
| 756 | if ((offset & (inode->i_sb->s_blocksize - 1)) == 0) { |
| 757 | offset++; |
| 758 | } |
| 759 | index = size >> PAGE_CACHE_SHIFT; |
| 760 | |
| 761 | page = grab_cache_page(mapping, index); |
| 762 | if (!page) { |
| 763 | ret = -ENOMEM; |
| 764 | mlog_errno(ret); |
| 765 | goto out; |
| 766 | } |
| 767 | |
Mark Fasheh | 53013cb | 2006-05-05 19:04:03 -0700 | [diff] [blame] | 768 | ret = ocfs2_prepare_write_nolock(inode, page, offset, offset); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 769 | if (ret < 0) { |
| 770 | mlog_errno(ret); |
| 771 | goto out_unlock; |
| 772 | } |
| 773 | |
| 774 | if (ocfs2_should_order_data(inode)) { |
| 775 | handle = ocfs2_start_walk_page_trans(inode, page, offset, |
| 776 | offset); |
| 777 | if (IS_ERR(handle)) { |
| 778 | ret = PTR_ERR(handle); |
| 779 | handle = NULL; |
| 780 | goto out_unlock; |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | /* must not update i_size! */ |
| 785 | ret = block_commit_write(page, offset, offset); |
| 786 | if (ret < 0) |
| 787 | mlog_errno(ret); |
| 788 | else |
| 789 | ret = 0; |
| 790 | |
| 791 | if (handle) |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 792 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 793 | out_unlock: |
| 794 | unlock_page(page); |
| 795 | page_cache_release(page); |
| 796 | out: |
| 797 | return ret; |
| 798 | } |
| 799 | |
| 800 | static int ocfs2_zero_extend(struct inode *inode, |
| 801 | u64 zero_to_size) |
| 802 | { |
| 803 | int ret = 0; |
| 804 | u64 start_off; |
| 805 | struct super_block *sb = inode->i_sb; |
| 806 | |
| 807 | start_off = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode)); |
| 808 | while (start_off < zero_to_size) { |
| 809 | ret = ocfs2_write_zero_page(inode, start_off); |
| 810 | if (ret < 0) { |
| 811 | mlog_errno(ret); |
| 812 | goto out; |
| 813 | } |
| 814 | |
| 815 | start_off += sb->s_blocksize; |
Mark Fasheh | e2057c5 | 2006-10-03 17:53:05 -0700 | [diff] [blame] | 816 | |
| 817 | /* |
| 818 | * Very large extends have the potential to lock up |
| 819 | * the cpu for extended periods of time. |
| 820 | */ |
| 821 | cond_resched(); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 822 | } |
| 823 | |
| 824 | out: |
| 825 | return ret; |
| 826 | } |
| 827 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 828 | int ocfs2_extend_no_holes(struct inode *inode, u64 new_i_size, u64 zero_to) |
| 829 | { |
| 830 | int ret; |
| 831 | u32 clusters_to_add; |
| 832 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 833 | |
| 834 | clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size); |
| 835 | if (clusters_to_add < oi->ip_clusters) |
| 836 | clusters_to_add = 0; |
| 837 | else |
| 838 | clusters_to_add -= oi->ip_clusters; |
| 839 | |
| 840 | if (clusters_to_add) { |
| 841 | ret = __ocfs2_extend_allocation(inode, oi->ip_clusters, |
| 842 | clusters_to_add, 0); |
| 843 | if (ret) { |
| 844 | mlog_errno(ret); |
| 845 | goto out; |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | /* |
| 850 | * Call this even if we don't add any clusters to the tree. We |
| 851 | * still need to zero the area between the old i_size and the |
| 852 | * new i_size. |
| 853 | */ |
| 854 | ret = ocfs2_zero_extend(inode, zero_to); |
| 855 | if (ret < 0) |
| 856 | mlog_errno(ret); |
| 857 | |
| 858 | out: |
| 859 | return ret; |
| 860 | } |
| 861 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 862 | static int ocfs2_extend_file(struct inode *inode, |
| 863 | struct buffer_head *di_bh, |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 864 | u64 new_i_size) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 865 | { |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 866 | int ret = 0; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 867 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 868 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 869 | BUG_ON(!di_bh); |
Mark Fasheh | 53013cb | 2006-05-05 19:04:03 -0700 | [diff] [blame] | 870 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 871 | /* setattr sometimes calls us like this. */ |
| 872 | if (new_i_size == 0) |
| 873 | goto out; |
| 874 | |
| 875 | if (i_size_read(inode) == new_i_size) |
| 876 | goto out; |
| 877 | BUG_ON(new_i_size < i_size_read(inode)); |
| 878 | |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 879 | /* |
| 880 | * Fall through for converting inline data, even if the fs |
| 881 | * supports sparse files. |
| 882 | * |
| 883 | * The check for inline data here is legal - nobody can add |
| 884 | * the feature since we have i_mutex. We must check it again |
| 885 | * after acquiring ip_alloc_sem though, as paths like mmap |
| 886 | * might have raced us to converting the inode to extents. |
| 887 | */ |
| 888 | if (!(oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) |
| 889 | && ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 890 | goto out_update_size; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 891 | |
Mark Fasheh | 0effef7 | 2006-10-03 17:44:42 -0700 | [diff] [blame] | 892 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 893 | * The alloc sem blocks people in read/write from reading our |
| 894 | * allocation until we're done changing it. We depend on |
| 895 | * i_mutex to block other extend/truncate calls while we're |
| 896 | * here. |
Mark Fasheh | 0effef7 | 2006-10-03 17:44:42 -0700 | [diff] [blame] | 897 | */ |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 898 | down_write(&oi->ip_alloc_sem); |
| 899 | |
| 900 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 901 | /* |
| 902 | * We can optimize small extends by keeping the inodes |
| 903 | * inline data. |
| 904 | */ |
| 905 | if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) { |
| 906 | up_write(&oi->ip_alloc_sem); |
| 907 | goto out_update_size; |
| 908 | } |
| 909 | |
| 910 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); |
| 911 | if (ret) { |
| 912 | up_write(&oi->ip_alloc_sem); |
| 913 | |
| 914 | mlog_errno(ret); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 915 | goto out; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 916 | } |
| 917 | } |
| 918 | |
| 919 | if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) |
| 920 | ret = ocfs2_extend_no_holes(inode, new_i_size, new_i_size); |
| 921 | |
| 922 | up_write(&oi->ip_alloc_sem); |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 923 | |
Mark Fasheh | 0effef7 | 2006-10-03 17:44:42 -0700 | [diff] [blame] | 924 | if (ret < 0) { |
| 925 | mlog_errno(ret); |
Mark Fasheh | c934a92 | 2007-10-18 15:23:46 -0700 | [diff] [blame] | 926 | goto out; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 927 | } |
| 928 | |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 929 | out_update_size: |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 930 | ret = ocfs2_simple_size_update(inode, di_bh, new_i_size); |
| 931 | if (ret < 0) |
| 932 | mlog_errno(ret); |
Mark Fasheh | 53013cb | 2006-05-05 19:04:03 -0700 | [diff] [blame] | 933 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 934 | out: |
| 935 | return ret; |
| 936 | } |
| 937 | |
| 938 | int ocfs2_setattr(struct dentry *dentry, struct iattr *attr) |
| 939 | { |
| 940 | int status = 0, size_change; |
| 941 | struct inode *inode = dentry->d_inode; |
| 942 | struct super_block *sb = inode->i_sb; |
| 943 | struct ocfs2_super *osb = OCFS2_SB(sb); |
| 944 | struct buffer_head *bh = NULL; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 945 | handle_t *handle = NULL; |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 946 | int qtype; |
| 947 | struct dquot *transfer_from[MAXQUOTAS] = { }; |
| 948 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 949 | |
| 950 | mlog_entry("(0x%p, '%.*s')\n", dentry, |
| 951 | dentry->d_name.len, dentry->d_name.name); |
| 952 | |
Sunil Mushran | bc53580 | 2008-04-18 10:23:53 -0700 | [diff] [blame] | 953 | /* ensuring we don't even attempt to truncate a symlink */ |
| 954 | if (S_ISLNK(inode->i_mode)) |
| 955 | attr->ia_valid &= ~ATTR_SIZE; |
| 956 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 957 | if (attr->ia_valid & ATTR_MODE) |
| 958 | mlog(0, "mode change: %d\n", attr->ia_mode); |
| 959 | if (attr->ia_valid & ATTR_UID) |
| 960 | mlog(0, "uid change: %d\n", attr->ia_uid); |
| 961 | if (attr->ia_valid & ATTR_GID) |
| 962 | mlog(0, "gid change: %d\n", attr->ia_gid); |
| 963 | if (attr->ia_valid & ATTR_SIZE) |
| 964 | mlog(0, "size change...\n"); |
| 965 | if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME)) |
| 966 | mlog(0, "time change...\n"); |
| 967 | |
| 968 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ |
| 969 | | ATTR_GID | ATTR_UID | ATTR_MODE) |
| 970 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) { |
| 971 | mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid); |
| 972 | return 0; |
| 973 | } |
| 974 | |
| 975 | status = inode_change_ok(inode, attr); |
| 976 | if (status) |
| 977 | return status; |
| 978 | |
| 979 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; |
| 980 | if (size_change) { |
| 981 | status = ocfs2_rw_lock(inode, 1); |
| 982 | if (status < 0) { |
| 983 | mlog_errno(status); |
| 984 | goto bail; |
| 985 | } |
| 986 | } |
| 987 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 988 | status = ocfs2_inode_lock(inode, &bh, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 989 | if (status < 0) { |
| 990 | if (status != -ENOENT) |
| 991 | mlog_errno(status); |
| 992 | goto bail_unlock_rw; |
| 993 | } |
| 994 | |
| 995 | if (size_change && attr->ia_size != i_size_read(inode)) { |
Mark Fasheh | ce76fd3 | 2007-07-20 12:02:14 -0700 | [diff] [blame] | 996 | if (attr->ia_size > sb->s_maxbytes) { |
| 997 | status = -EFBIG; |
| 998 | goto bail_unlock; |
| 999 | } |
| 1000 | |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 1001 | if (i_size_read(inode) > attr->ia_size) { |
| 1002 | if (ocfs2_should_order_data(inode)) { |
| 1003 | status = ocfs2_begin_ordered_truncate(inode, |
| 1004 | attr->ia_size); |
| 1005 | if (status) |
| 1006 | goto bail_unlock; |
| 1007 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1008 | status = ocfs2_truncate_file(inode, bh, attr->ia_size); |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 1009 | } else |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1010 | status = ocfs2_extend_file(inode, bh, attr->ia_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1011 | if (status < 0) { |
| 1012 | if (status != -ENOSPC) |
| 1013 | mlog_errno(status); |
| 1014 | status = -ENOSPC; |
| 1015 | goto bail_unlock; |
| 1016 | } |
| 1017 | } |
| 1018 | |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1019 | if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) || |
| 1020 | (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1021 | /* |
| 1022 | * Gather pointers to quota structures so that allocation / |
| 1023 | * freeing of quota structures happens here and not inside |
| 1024 | * vfs_dq_transfer() where we have problems with lock ordering |
| 1025 | */ |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1026 | if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid |
| 1027 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
| 1028 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1029 | transfer_to[USRQUOTA] = dqget(sb, attr->ia_uid, |
| 1030 | USRQUOTA); |
| 1031 | transfer_from[USRQUOTA] = dqget(sb, inode->i_uid, |
| 1032 | USRQUOTA); |
| 1033 | if (!transfer_to[USRQUOTA] || !transfer_from[USRQUOTA]) { |
| 1034 | status = -ESRCH; |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1035 | goto bail_unlock; |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1036 | } |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1037 | } |
| 1038 | if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid |
| 1039 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
| 1040 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1041 | transfer_to[GRPQUOTA] = dqget(sb, attr->ia_gid, |
| 1042 | GRPQUOTA); |
| 1043 | transfer_from[GRPQUOTA] = dqget(sb, inode->i_gid, |
| 1044 | GRPQUOTA); |
| 1045 | if (!transfer_to[GRPQUOTA] || !transfer_from[GRPQUOTA]) { |
| 1046 | status = -ESRCH; |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1047 | goto bail_unlock; |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1048 | } |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1049 | } |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1050 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS + |
| 1051 | 2 * ocfs2_quota_trans_credits(sb)); |
Jan Kara | a90714c | 2008-10-09 19:38:40 +0200 | [diff] [blame] | 1052 | if (IS_ERR(handle)) { |
| 1053 | status = PTR_ERR(handle); |
| 1054 | mlog_errno(status); |
| 1055 | goto bail_unlock; |
| 1056 | } |
| 1057 | status = vfs_dq_transfer(inode, attr) ? -EDQUOT : 0; |
| 1058 | if (status < 0) |
| 1059 | goto bail_commit; |
| 1060 | } else { |
| 1061 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| 1062 | if (IS_ERR(handle)) { |
| 1063 | status = PTR_ERR(handle); |
| 1064 | mlog_errno(status); |
| 1065 | goto bail_unlock; |
| 1066 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1067 | } |
| 1068 | |
Mark Fasheh | 7307de8 | 2007-05-09 15:16:19 -0700 | [diff] [blame] | 1069 | /* |
| 1070 | * This will intentionally not wind up calling vmtruncate(), |
| 1071 | * since all the work for a size change has been done above. |
| 1072 | * Otherwise, we could get into problems with truncate as |
| 1073 | * ip_alloc_sem is used there to protect against i_size |
| 1074 | * changes. |
| 1075 | */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1076 | status = inode_setattr(inode, attr); |
| 1077 | if (status < 0) { |
| 1078 | mlog_errno(status); |
| 1079 | goto bail_commit; |
| 1080 | } |
| 1081 | |
| 1082 | status = ocfs2_mark_inode_dirty(handle, inode, bh); |
| 1083 | if (status < 0) |
| 1084 | mlog_errno(status); |
| 1085 | |
| 1086 | bail_commit: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 1087 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1088 | bail_unlock: |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1089 | ocfs2_inode_unlock(inode, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1090 | bail_unlock_rw: |
| 1091 | if (size_change) |
| 1092 | ocfs2_rw_unlock(inode, 1); |
| 1093 | bail: |
Mark Fasheh | a81cb88 | 2008-10-07 14:25:16 -0700 | [diff] [blame] | 1094 | brelse(bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1095 | |
Jan Kara | 65bac57 | 2009-06-02 14:24:01 +0200 | [diff] [blame] | 1096 | /* Release quota pointers in case we acquired them */ |
| 1097 | for (qtype = 0; qtype < MAXQUOTAS; qtype++) { |
| 1098 | dqput(transfer_to[qtype]); |
| 1099 | dqput(transfer_from[qtype]); |
| 1100 | } |
| 1101 | |
Tiger Yang | 060bc66 | 2008-11-14 11:17:29 +0800 | [diff] [blame] | 1102 | if (!status && attr->ia_valid & ATTR_MODE) { |
| 1103 | status = ocfs2_acl_chmod(inode); |
| 1104 | if (status < 0) |
| 1105 | mlog_errno(status); |
| 1106 | } |
| 1107 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1108 | mlog_exit(status); |
| 1109 | return status; |
| 1110 | } |
| 1111 | |
| 1112 | int ocfs2_getattr(struct vfsmount *mnt, |
| 1113 | struct dentry *dentry, |
| 1114 | struct kstat *stat) |
| 1115 | { |
| 1116 | struct inode *inode = dentry->d_inode; |
| 1117 | struct super_block *sb = dentry->d_inode->i_sb; |
| 1118 | struct ocfs2_super *osb = sb->s_fs_info; |
| 1119 | int err; |
| 1120 | |
| 1121 | mlog_entry_void(); |
| 1122 | |
| 1123 | err = ocfs2_inode_revalidate(dentry); |
| 1124 | if (err) { |
| 1125 | if (err != -ENOENT) |
| 1126 | mlog_errno(err); |
| 1127 | goto bail; |
| 1128 | } |
| 1129 | |
| 1130 | generic_fillattr(inode, stat); |
| 1131 | |
| 1132 | /* We set the blksize from the cluster size for performance */ |
| 1133 | stat->blksize = osb->s_clustersize; |
| 1134 | |
| 1135 | bail: |
| 1136 | mlog_exit(err); |
| 1137 | |
| 1138 | return err; |
| 1139 | } |
| 1140 | |
Al Viro | e6305c4 | 2008-07-15 21:03:57 -0400 | [diff] [blame] | 1141 | int ocfs2_permission(struct inode *inode, int mask) |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1142 | { |
| 1143 | int ret; |
| 1144 | |
| 1145 | mlog_entry_void(); |
| 1146 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1147 | ret = ocfs2_inode_lock(inode, NULL, 0); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1148 | if (ret) { |
Mark Fasheh | a9f5f70 | 2007-04-26 11:43:43 -0700 | [diff] [blame] | 1149 | if (ret != -ENOENT) |
| 1150 | mlog_errno(ret); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1151 | goto out; |
| 1152 | } |
| 1153 | |
Tiger Yang | 23fc270 | 2008-11-14 11:17:18 +0800 | [diff] [blame] | 1154 | ret = generic_permission(inode, mask, ocfs2_check_acl); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1155 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1156 | ocfs2_inode_unlock(inode, 0); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1157 | out: |
| 1158 | mlog_exit(ret); |
| 1159 | return ret; |
| 1160 | } |
| 1161 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1162 | static int __ocfs2_write_remove_suid(struct inode *inode, |
| 1163 | struct buffer_head *bh) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1164 | { |
| 1165 | int ret; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1166 | handle_t *handle; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1167 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1168 | struct ocfs2_dinode *di; |
| 1169 | |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1170 | mlog_entry("(Inode %llu, mode 0%o)\n", |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1171 | (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1172 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 1173 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 1174 | if (IS_ERR(handle)) { |
| 1175 | ret = PTR_ERR(handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1176 | mlog_errno(ret); |
| 1177 | goto out; |
| 1178 | } |
| 1179 | |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 1180 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
Joel Becker | 13723d0 | 2008-10-17 19:25:01 -0700 | [diff] [blame] | 1181 | OCFS2_JOURNAL_ACCESS_WRITE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1182 | if (ret < 0) { |
| 1183 | mlog_errno(ret); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1184 | goto out_trans; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1185 | } |
| 1186 | |
| 1187 | inode->i_mode &= ~S_ISUID; |
| 1188 | if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP)) |
| 1189 | inode->i_mode &= ~S_ISGID; |
| 1190 | |
| 1191 | di = (struct ocfs2_dinode *) bh->b_data; |
| 1192 | di->i_mode = cpu_to_le16(inode->i_mode); |
| 1193 | |
| 1194 | ret = ocfs2_journal_dirty(handle, bh); |
| 1195 | if (ret < 0) |
| 1196 | mlog_errno(ret); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1197 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1198 | out_trans: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 1199 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1200 | out: |
| 1201 | mlog_exit(ret); |
| 1202 | return ret; |
| 1203 | } |
| 1204 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1205 | /* |
| 1206 | * Will look for holes and unwritten extents in the range starting at |
| 1207 | * pos for count bytes (inclusive). |
| 1208 | */ |
| 1209 | static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos, |
| 1210 | size_t count) |
| 1211 | { |
| 1212 | int ret = 0; |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1213 | unsigned int extent_flags; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1214 | u32 cpos, clusters, extent_len, phys_cpos; |
| 1215 | struct super_block *sb = inode->i_sb; |
| 1216 | |
| 1217 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; |
| 1218 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; |
| 1219 | |
| 1220 | while (clusters) { |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1221 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
| 1222 | &extent_flags); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1223 | if (ret < 0) { |
| 1224 | mlog_errno(ret); |
| 1225 | goto out; |
| 1226 | } |
| 1227 | |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1228 | if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1229 | ret = 1; |
| 1230 | break; |
| 1231 | } |
| 1232 | |
| 1233 | if (extent_len > clusters) |
| 1234 | extent_len = clusters; |
| 1235 | |
| 1236 | clusters -= extent_len; |
| 1237 | cpos += extent_len; |
| 1238 | } |
| 1239 | out: |
| 1240 | return ret; |
| 1241 | } |
| 1242 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1243 | static int ocfs2_write_remove_suid(struct inode *inode) |
| 1244 | { |
| 1245 | int ret; |
| 1246 | struct buffer_head *bh = NULL; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1247 | |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 1248 | ret = ocfs2_read_inode_block(inode, &bh); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1249 | if (ret < 0) { |
| 1250 | mlog_errno(ret); |
| 1251 | goto out; |
| 1252 | } |
| 1253 | |
| 1254 | ret = __ocfs2_write_remove_suid(inode, bh); |
| 1255 | out: |
| 1256 | brelse(bh); |
| 1257 | return ret; |
| 1258 | } |
| 1259 | |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1260 | /* |
| 1261 | * Allocate enough extents to cover the region starting at byte offset |
| 1262 | * start for len bytes. Existing extents are skipped, any extents |
| 1263 | * added are marked as "unwritten". |
| 1264 | */ |
| 1265 | static int ocfs2_allocate_unwritten_extents(struct inode *inode, |
| 1266 | u64 start, u64 len) |
| 1267 | { |
| 1268 | int ret; |
| 1269 | u32 cpos, phys_cpos, clusters, alloc_size; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1270 | u64 end = start + len; |
| 1271 | struct buffer_head *di_bh = NULL; |
| 1272 | |
| 1273 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
Joel Becker | b657c95 | 2008-11-13 14:49:11 -0800 | [diff] [blame] | 1274 | ret = ocfs2_read_inode_block(inode, &di_bh); |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1275 | if (ret) { |
| 1276 | mlog_errno(ret); |
| 1277 | goto out; |
| 1278 | } |
| 1279 | |
| 1280 | /* |
| 1281 | * Nothing to do if the requested reservation range |
| 1282 | * fits within the inode. |
| 1283 | */ |
| 1284 | if (ocfs2_size_fits_inline_data(di_bh, end)) |
| 1285 | goto out; |
| 1286 | |
| 1287 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); |
| 1288 | if (ret) { |
| 1289 | mlog_errno(ret); |
| 1290 | goto out; |
| 1291 | } |
| 1292 | } |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1293 | |
| 1294 | /* |
| 1295 | * We consider both start and len to be inclusive. |
| 1296 | */ |
| 1297 | cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 1298 | clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len); |
| 1299 | clusters -= cpos; |
| 1300 | |
| 1301 | while (clusters) { |
| 1302 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, |
| 1303 | &alloc_size, NULL); |
| 1304 | if (ret) { |
| 1305 | mlog_errno(ret); |
| 1306 | goto out; |
| 1307 | } |
| 1308 | |
| 1309 | /* |
| 1310 | * Hole or existing extent len can be arbitrary, so |
| 1311 | * cap it to our own allocation request. |
| 1312 | */ |
| 1313 | if (alloc_size > clusters) |
| 1314 | alloc_size = clusters; |
| 1315 | |
| 1316 | if (phys_cpos) { |
| 1317 | /* |
| 1318 | * We already have an allocation at this |
| 1319 | * region so we can safely skip it. |
| 1320 | */ |
| 1321 | goto next; |
| 1322 | } |
| 1323 | |
| 1324 | ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1); |
| 1325 | if (ret) { |
| 1326 | if (ret != -ENOSPC) |
| 1327 | mlog_errno(ret); |
| 1328 | goto out; |
| 1329 | } |
| 1330 | |
| 1331 | next: |
| 1332 | cpos += alloc_size; |
| 1333 | clusters -= alloc_size; |
| 1334 | } |
| 1335 | |
| 1336 | ret = 0; |
| 1337 | out: |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1338 | |
| 1339 | brelse(di_bh); |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1340 | return ret; |
| 1341 | } |
| 1342 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1343 | /* |
| 1344 | * Truncate a byte range, avoiding pages within partial clusters. This |
| 1345 | * preserves those pages for the zeroing code to write to. |
| 1346 | */ |
| 1347 | static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start, |
| 1348 | u64 byte_len) |
| 1349 | { |
| 1350 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1351 | loff_t start, end; |
| 1352 | struct address_space *mapping = inode->i_mapping; |
| 1353 | |
| 1354 | start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start); |
| 1355 | end = byte_start + byte_len; |
| 1356 | end = end & ~(osb->s_clustersize - 1); |
| 1357 | |
| 1358 | if (start < end) { |
| 1359 | unmap_mapping_range(mapping, start, end - start, 0); |
| 1360 | truncate_inode_pages_range(mapping, start, end - 1); |
| 1361 | } |
| 1362 | } |
| 1363 | |
| 1364 | static int ocfs2_zero_partial_clusters(struct inode *inode, |
| 1365 | u64 start, u64 len) |
| 1366 | { |
| 1367 | int ret = 0; |
| 1368 | u64 tmpend, end = start + len; |
| 1369 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1370 | unsigned int csize = osb->s_clustersize; |
| 1371 | handle_t *handle; |
| 1372 | |
| 1373 | /* |
| 1374 | * The "start" and "end" values are NOT necessarily part of |
| 1375 | * the range whose allocation is being deleted. Rather, this |
| 1376 | * is what the user passed in with the request. We must zero |
| 1377 | * partial clusters here. There's no need to worry about |
| 1378 | * physical allocation - the zeroing code knows to skip holes. |
| 1379 | */ |
| 1380 | mlog(0, "byte start: %llu, end: %llu\n", |
| 1381 | (unsigned long long)start, (unsigned long long)end); |
| 1382 | |
| 1383 | /* |
| 1384 | * If both edges are on a cluster boundary then there's no |
| 1385 | * zeroing required as the region is part of the allocation to |
| 1386 | * be truncated. |
| 1387 | */ |
| 1388 | if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0) |
| 1389 | goto out; |
| 1390 | |
| 1391 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Jan Kara | fa38e92 | 2008-10-20 19:23:51 +0200 | [diff] [blame] | 1392 | if (IS_ERR(handle)) { |
| 1393 | ret = PTR_ERR(handle); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1394 | mlog_errno(ret); |
| 1395 | goto out; |
| 1396 | } |
| 1397 | |
| 1398 | /* |
| 1399 | * We want to get the byte offset of the end of the 1st cluster. |
| 1400 | */ |
| 1401 | tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1)); |
| 1402 | if (tmpend > end) |
| 1403 | tmpend = end; |
| 1404 | |
| 1405 | mlog(0, "1st range: start: %llu, tmpend: %llu\n", |
| 1406 | (unsigned long long)start, (unsigned long long)tmpend); |
| 1407 | |
| 1408 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend); |
| 1409 | if (ret) |
| 1410 | mlog_errno(ret); |
| 1411 | |
| 1412 | if (tmpend < end) { |
| 1413 | /* |
| 1414 | * This may make start and end equal, but the zeroing |
| 1415 | * code will skip any work in that case so there's no |
| 1416 | * need to catch it up here. |
| 1417 | */ |
| 1418 | start = end & ~(osb->s_clustersize - 1); |
| 1419 | |
| 1420 | mlog(0, "2nd range: start: %llu, end: %llu\n", |
| 1421 | (unsigned long long)start, (unsigned long long)end); |
| 1422 | |
| 1423 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, end); |
| 1424 | if (ret) |
| 1425 | mlog_errno(ret); |
| 1426 | } |
| 1427 | |
| 1428 | ocfs2_commit_trans(osb, handle); |
| 1429 | out: |
| 1430 | return ret; |
| 1431 | } |
| 1432 | |
| 1433 | static int ocfs2_remove_inode_range(struct inode *inode, |
| 1434 | struct buffer_head *di_bh, u64 byte_start, |
| 1435 | u64 byte_len) |
| 1436 | { |
| 1437 | int ret = 0; |
| 1438 | u32 trunc_start, trunc_len, cpos, phys_cpos, alloc_size; |
| 1439 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1440 | struct ocfs2_cached_dealloc_ctxt dealloc; |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 1441 | struct address_space *mapping = inode->i_mapping; |
Mark Fasheh | fecc011 | 2008-11-12 15:16:38 -0800 | [diff] [blame] | 1442 | struct ocfs2_extent_tree et; |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1443 | |
Joel Becker | 5e404e9 | 2009-02-13 03:54:22 -0800 | [diff] [blame] | 1444 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1445 | ocfs2_init_dealloc_ctxt(&dealloc); |
| 1446 | |
| 1447 | if (byte_len == 0) |
| 1448 | return 0; |
| 1449 | |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1450 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 1451 | ret = ocfs2_truncate_inline(inode, di_bh, byte_start, |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 1452 | byte_start + byte_len, 0); |
| 1453 | if (ret) { |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1454 | mlog_errno(ret); |
Mark Fasheh | b1967d0 | 2007-11-20 11:56:39 -0800 | [diff] [blame] | 1455 | goto out; |
| 1456 | } |
| 1457 | /* |
| 1458 | * There's no need to get fancy with the page cache |
| 1459 | * truncate of an inline-data inode. We're talking |
| 1460 | * about less than a page here, which will be cached |
| 1461 | * in the dinode buffer anyway. |
| 1462 | */ |
| 1463 | unmap_mapping_range(mapping, 0, 0, 0); |
| 1464 | truncate_inode_pages(mapping, 0); |
| 1465 | goto out; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1466 | } |
| 1467 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1468 | trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start); |
| 1469 | trunc_len = (byte_start + byte_len) >> osb->s_clustersize_bits; |
| 1470 | if (trunc_len >= trunc_start) |
| 1471 | trunc_len -= trunc_start; |
| 1472 | else |
| 1473 | trunc_len = 0; |
| 1474 | |
| 1475 | mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, clen: %u\n", |
| 1476 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 1477 | (unsigned long long)byte_start, |
| 1478 | (unsigned long long)byte_len, trunc_start, trunc_len); |
| 1479 | |
| 1480 | ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len); |
| 1481 | if (ret) { |
| 1482 | mlog_errno(ret); |
| 1483 | goto out; |
| 1484 | } |
| 1485 | |
| 1486 | cpos = trunc_start; |
| 1487 | while (trunc_len) { |
| 1488 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, |
| 1489 | &alloc_size, NULL); |
| 1490 | if (ret) { |
| 1491 | mlog_errno(ret); |
| 1492 | goto out; |
| 1493 | } |
| 1494 | |
| 1495 | if (alloc_size > trunc_len) |
| 1496 | alloc_size = trunc_len; |
| 1497 | |
| 1498 | /* Only do work for non-holes */ |
| 1499 | if (phys_cpos != 0) { |
Mark Fasheh | fecc011 | 2008-11-12 15:16:38 -0800 | [diff] [blame] | 1500 | ret = ocfs2_remove_btree_range(inode, &et, cpos, |
| 1501 | phys_cpos, alloc_size, |
| 1502 | &dealloc); |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1503 | if (ret) { |
| 1504 | mlog_errno(ret); |
| 1505 | goto out; |
| 1506 | } |
| 1507 | } |
| 1508 | |
| 1509 | cpos += alloc_size; |
| 1510 | trunc_len -= alloc_size; |
| 1511 | } |
| 1512 | |
| 1513 | ocfs2_truncate_cluster_pages(inode, byte_start, byte_len); |
| 1514 | |
| 1515 | out: |
| 1516 | ocfs2_schedule_truncate_log_flush(osb, 1); |
| 1517 | ocfs2_run_deallocs(osb, &dealloc); |
| 1518 | |
| 1519 | return ret; |
| 1520 | } |
| 1521 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1522 | /* |
| 1523 | * Parts of this function taken from xfs_change_file_space() |
| 1524 | */ |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1525 | static int __ocfs2_change_file_space(struct file *file, struct inode *inode, |
| 1526 | loff_t f_pos, unsigned int cmd, |
| 1527 | struct ocfs2_space_resv *sr, |
| 1528 | int change_size) |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1529 | { |
| 1530 | int ret; |
| 1531 | s64 llen; |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1532 | loff_t size; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1533 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1534 | struct buffer_head *di_bh = NULL; |
| 1535 | handle_t *handle; |
Mark Fasheh | a00cce3 | 2007-07-20 11:28:30 -0700 | [diff] [blame] | 1536 | unsigned long long max_off = inode->i_sb->s_maxbytes; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1537 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1538 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
| 1539 | return -EROFS; |
| 1540 | |
| 1541 | mutex_lock(&inode->i_mutex); |
| 1542 | |
| 1543 | /* |
| 1544 | * This prevents concurrent writes on other nodes |
| 1545 | */ |
| 1546 | ret = ocfs2_rw_lock(inode, 1); |
| 1547 | if (ret) { |
| 1548 | mlog_errno(ret); |
| 1549 | goto out; |
| 1550 | } |
| 1551 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1552 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1553 | if (ret) { |
| 1554 | mlog_errno(ret); |
| 1555 | goto out_rw_unlock; |
| 1556 | } |
| 1557 | |
| 1558 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { |
| 1559 | ret = -EPERM; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1560 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1561 | } |
| 1562 | |
| 1563 | switch (sr->l_whence) { |
| 1564 | case 0: /*SEEK_SET*/ |
| 1565 | break; |
| 1566 | case 1: /*SEEK_CUR*/ |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1567 | sr->l_start += f_pos; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1568 | break; |
| 1569 | case 2: /*SEEK_END*/ |
| 1570 | sr->l_start += i_size_read(inode); |
| 1571 | break; |
| 1572 | default: |
| 1573 | ret = -EINVAL; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1574 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1575 | } |
| 1576 | sr->l_whence = 0; |
| 1577 | |
| 1578 | llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len; |
| 1579 | |
| 1580 | if (sr->l_start < 0 |
| 1581 | || sr->l_start > max_off |
| 1582 | || (sr->l_start + llen) < 0 |
| 1583 | || (sr->l_start + llen) > max_off) { |
| 1584 | ret = -EINVAL; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1585 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1586 | } |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1587 | size = sr->l_start + sr->l_len; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1588 | |
| 1589 | if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) { |
| 1590 | if (sr->l_len <= 0) { |
| 1591 | ret = -EINVAL; |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1592 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1593 | } |
| 1594 | } |
| 1595 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1596 | if (file && should_remove_suid(file->f_path.dentry)) { |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1597 | ret = __ocfs2_write_remove_suid(inode, di_bh); |
| 1598 | if (ret) { |
| 1599 | mlog_errno(ret); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1600 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1601 | } |
| 1602 | } |
| 1603 | |
| 1604 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 1605 | switch (cmd) { |
| 1606 | case OCFS2_IOC_RESVSP: |
| 1607 | case OCFS2_IOC_RESVSP64: |
| 1608 | /* |
| 1609 | * This takes unsigned offsets, but the signed ones we |
| 1610 | * pass have been checked against overflow above. |
| 1611 | */ |
| 1612 | ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start, |
| 1613 | sr->l_len); |
| 1614 | break; |
| 1615 | case OCFS2_IOC_UNRESVSP: |
| 1616 | case OCFS2_IOC_UNRESVSP64: |
| 1617 | ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start, |
| 1618 | sr->l_len); |
| 1619 | break; |
| 1620 | default: |
| 1621 | ret = -EINVAL; |
| 1622 | } |
| 1623 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 1624 | if (ret) { |
| 1625 | mlog_errno(ret); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1626 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1627 | } |
| 1628 | |
| 1629 | /* |
| 1630 | * We update c/mtime for these changes |
| 1631 | */ |
| 1632 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| 1633 | if (IS_ERR(handle)) { |
| 1634 | ret = PTR_ERR(handle); |
| 1635 | mlog_errno(ret); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1636 | goto out_inode_unlock; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1637 | } |
| 1638 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1639 | if (change_size && i_size_read(inode) < size) |
| 1640 | i_size_write(inode, size); |
| 1641 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1642 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 1643 | ret = ocfs2_mark_inode_dirty(handle, inode, di_bh); |
| 1644 | if (ret < 0) |
| 1645 | mlog_errno(ret); |
| 1646 | |
| 1647 | ocfs2_commit_trans(osb, handle); |
| 1648 | |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1649 | out_inode_unlock: |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1650 | brelse(di_bh); |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1651 | ocfs2_inode_unlock(inode, 1); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1652 | out_rw_unlock: |
| 1653 | ocfs2_rw_unlock(inode, 1); |
| 1654 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1655 | out: |
Julia Lawall | c259ae5 | 2008-07-21 09:59:15 +0200 | [diff] [blame] | 1656 | mutex_unlock(&inode->i_mutex); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1657 | return ret; |
| 1658 | } |
| 1659 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1660 | int ocfs2_change_file_space(struct file *file, unsigned int cmd, |
| 1661 | struct ocfs2_space_resv *sr) |
| 1662 | { |
| 1663 | struct inode *inode = file->f_path.dentry->d_inode; |
Fernando Carrijo | c19a28e | 2009-01-07 18:09:08 -0800 | [diff] [blame] | 1664 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1665 | |
| 1666 | if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) && |
| 1667 | !ocfs2_writes_unwritten_extents(osb)) |
| 1668 | return -ENOTTY; |
| 1669 | else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) && |
| 1670 | !ocfs2_sparse_alloc(osb)) |
| 1671 | return -ENOTTY; |
| 1672 | |
| 1673 | if (!S_ISREG(inode->i_mode)) |
| 1674 | return -EINVAL; |
| 1675 | |
| 1676 | if (!(file->f_mode & FMODE_WRITE)) |
| 1677 | return -EBADF; |
| 1678 | |
| 1679 | return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0); |
| 1680 | } |
| 1681 | |
| 1682 | static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset, |
| 1683 | loff_t len) |
| 1684 | { |
| 1685 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1686 | struct ocfs2_space_resv sr; |
| 1687 | int change_size = 1; |
| 1688 | |
| 1689 | if (!ocfs2_writes_unwritten_extents(osb)) |
| 1690 | return -EOPNOTSUPP; |
| 1691 | |
| 1692 | if (S_ISDIR(inode->i_mode)) |
| 1693 | return -ENODEV; |
| 1694 | |
| 1695 | if (mode & FALLOC_FL_KEEP_SIZE) |
| 1696 | change_size = 0; |
| 1697 | |
| 1698 | sr.l_whence = 0; |
| 1699 | sr.l_start = (s64)offset; |
| 1700 | sr.l_len = (s64)len; |
| 1701 | |
| 1702 | return __ocfs2_change_file_space(NULL, inode, offset, |
| 1703 | OCFS2_IOC_RESVSP64, &sr, change_size); |
| 1704 | } |
| 1705 | |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 1706 | int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos, |
| 1707 | size_t count) |
| 1708 | { |
| 1709 | int ret = 0; |
| 1710 | unsigned int extent_flags; |
| 1711 | u32 cpos, clusters, extent_len, phys_cpos; |
| 1712 | struct super_block *sb = inode->i_sb; |
| 1713 | |
| 1714 | if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) || |
Tao Ma | 2f48d59 | 2009-10-15 11:10:49 +0800 | [diff] [blame] | 1715 | !(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) || |
| 1716 | OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 1717 | return 0; |
| 1718 | |
| 1719 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; |
| 1720 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; |
| 1721 | |
| 1722 | while (clusters) { |
| 1723 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
| 1724 | &extent_flags); |
| 1725 | if (ret < 0) { |
| 1726 | mlog_errno(ret); |
| 1727 | goto out; |
| 1728 | } |
| 1729 | |
| 1730 | if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) { |
| 1731 | ret = 1; |
| 1732 | break; |
| 1733 | } |
| 1734 | |
| 1735 | if (extent_len > clusters) |
| 1736 | extent_len = clusters; |
| 1737 | |
| 1738 | clusters -= extent_len; |
| 1739 | cpos += extent_len; |
| 1740 | } |
| 1741 | out: |
| 1742 | return ret; |
| 1743 | } |
| 1744 | |
| 1745 | static int ocfs2_prepare_inode_for_refcount(struct inode *inode, |
| 1746 | loff_t pos, size_t count, |
| 1747 | int *meta_level) |
| 1748 | { |
| 1749 | int ret; |
| 1750 | struct buffer_head *di_bh = NULL; |
| 1751 | u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 1752 | u32 clusters = |
| 1753 | ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos; |
| 1754 | |
| 1755 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
| 1756 | if (ret) { |
| 1757 | mlog_errno(ret); |
| 1758 | goto out; |
| 1759 | } |
| 1760 | |
| 1761 | *meta_level = 1; |
| 1762 | |
Tao Ma | 37f8a2b | 2009-08-26 09:47:28 +0800 | [diff] [blame] | 1763 | ret = ocfs2_refcount_cow(inode, di_bh, cpos, clusters, UINT_MAX); |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 1764 | if (ret) |
| 1765 | mlog_errno(ret); |
| 1766 | out: |
| 1767 | brelse(di_bh); |
| 1768 | return ret; |
| 1769 | } |
| 1770 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1771 | static int ocfs2_prepare_inode_for_write(struct dentry *dentry, |
| 1772 | loff_t *ppos, |
| 1773 | size_t count, |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1774 | int appending, |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 1775 | int *direct_io, |
| 1776 | int *has_refcount) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1777 | { |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1778 | int ret = 0, meta_level = 0; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1779 | struct inode *inode = dentry->d_inode; |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1780 | loff_t saved_pos, end; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1781 | |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 1782 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1783 | * We start with a read level meta lock and only jump to an ex |
| 1784 | * if we need to make modifications here. |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1785 | */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1786 | for(;;) { |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1787 | ret = ocfs2_inode_lock(inode, NULL, meta_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1788 | if (ret < 0) { |
| 1789 | meta_level = -1; |
| 1790 | mlog_errno(ret); |
| 1791 | goto out; |
| 1792 | } |
| 1793 | |
| 1794 | /* Clear suid / sgid if necessary. We do this here |
| 1795 | * instead of later in the write path because |
| 1796 | * remove_suid() calls ->setattr without any hint that |
| 1797 | * we may have already done our cluster locking. Since |
| 1798 | * ocfs2_setattr() *must* take cluster locks to |
| 1799 | * proceeed, this will lead us to recursively lock the |
| 1800 | * inode. There's also the dinode i_size state which |
| 1801 | * can be lost via setattr during extending writes (we |
| 1802 | * set inode->i_size at the end of a write. */ |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1803 | if (should_remove_suid(dentry)) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1804 | if (meta_level == 0) { |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 1805 | ocfs2_inode_unlock(inode, meta_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1806 | meta_level = 1; |
| 1807 | continue; |
| 1808 | } |
| 1809 | |
| 1810 | ret = ocfs2_write_remove_suid(inode); |
| 1811 | if (ret < 0) { |
| 1812 | mlog_errno(ret); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1813 | goto out_unlock; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1814 | } |
| 1815 | } |
| 1816 | |
| 1817 | /* work on a copy of ppos until we're sure that we won't have |
| 1818 | * to recalculate it due to relocking. */ |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1819 | if (appending) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1820 | saved_pos = i_size_read(inode); |
| 1821 | mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos); |
| 1822 | } else { |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1823 | saved_pos = *ppos; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1824 | } |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 1825 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1826 | end = saved_pos + count; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1827 | |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 1828 | ret = ocfs2_check_range_for_refcount(inode, saved_pos, count); |
| 1829 | if (ret == 1) { |
| 1830 | ocfs2_inode_unlock(inode, meta_level); |
| 1831 | meta_level = -1; |
| 1832 | |
| 1833 | ret = ocfs2_prepare_inode_for_refcount(inode, |
| 1834 | saved_pos, |
| 1835 | count, |
| 1836 | &meta_level); |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 1837 | if (has_refcount) |
| 1838 | *has_refcount = 1; |
Wengang Wang | 96a1cc7 | 2010-02-09 14:57:45 +0800 | [diff] [blame^] | 1839 | if (direct_io) |
| 1840 | *direct_io = 0; |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 1841 | } |
| 1842 | |
| 1843 | if (ret < 0) { |
| 1844 | mlog_errno(ret); |
| 1845 | goto out_unlock; |
| 1846 | } |
| 1847 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1848 | /* |
| 1849 | * Skip the O_DIRECT checks if we don't need |
| 1850 | * them. |
| 1851 | */ |
| 1852 | if (!direct_io || !(*direct_io)) |
| 1853 | break; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1854 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1855 | /* |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1856 | * There's no sane way to do direct writes to an inode |
| 1857 | * with inline data. |
| 1858 | */ |
| 1859 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 1860 | *direct_io = 0; |
| 1861 | break; |
| 1862 | } |
| 1863 | |
| 1864 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1865 | * Allowing concurrent direct writes means |
| 1866 | * i_size changes wouldn't be synchronized, so |
| 1867 | * one node could wind up truncating another |
| 1868 | * nodes writes. |
| 1869 | */ |
| 1870 | if (end > i_size_read(inode)) { |
| 1871 | *direct_io = 0; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1872 | break; |
| 1873 | } |
| 1874 | |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 1875 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1876 | * We don't fill holes during direct io, so |
| 1877 | * check for them here. If any are found, the |
| 1878 | * caller will have to retake some cluster |
| 1879 | * locks and initiate the io as buffered. |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 1880 | */ |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1881 | ret = ocfs2_check_range_for_holes(inode, saved_pos, count); |
| 1882 | if (ret == 1) { |
| 1883 | *direct_io = 0; |
| 1884 | ret = 0; |
| 1885 | } else if (ret < 0) |
| 1886 | mlog_errno(ret); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1887 | break; |
| 1888 | } |
| 1889 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1890 | if (appending) |
| 1891 | *ppos = saved_pos; |
| 1892 | |
| 1893 | out_unlock: |
Tao Ma | 293b2f7 | 2009-08-25 08:02:48 +0800 | [diff] [blame] | 1894 | if (meta_level >= 0) |
| 1895 | ocfs2_inode_unlock(inode, meta_level); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1896 | |
| 1897 | out: |
| 1898 | return ret; |
| 1899 | } |
| 1900 | |
| 1901 | static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, |
| 1902 | const struct iovec *iov, |
| 1903 | unsigned long nr_segs, |
| 1904 | loff_t pos) |
| 1905 | { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1906 | int ret, direct_io, appending, rw_level, have_alloc_sem = 0; |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 1907 | int can_do_direct, has_refcount = 0; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1908 | ssize_t written = 0; |
| 1909 | size_t ocount; /* original count */ |
| 1910 | size_t count; /* after file limit checks */ |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 1911 | loff_t old_size, *ppos = &iocb->ki_pos; |
| 1912 | u32 old_clusters; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1913 | struct file *file = iocb->ki_filp; |
| 1914 | struct inode *inode = file->f_path.dentry->d_inode; |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 1915 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1916 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1917 | mlog_entry("(0x%p, %u, '%.*s')\n", file, |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1918 | (unsigned int)nr_segs, |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1919 | file->f_path.dentry->d_name.len, |
| 1920 | file->f_path.dentry->d_name.name); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1921 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1922 | if (iocb->ki_left == 0) |
| 1923 | return 0; |
| 1924 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1925 | vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); |
| 1926 | |
| 1927 | appending = file->f_flags & O_APPEND ? 1 : 0; |
| 1928 | direct_io = file->f_flags & O_DIRECT ? 1 : 0; |
| 1929 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1930 | mutex_lock(&inode->i_mutex); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1931 | |
| 1932 | relock: |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1933 | /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */ |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1934 | if (direct_io) { |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1935 | down_read(&inode->i_alloc_sem); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1936 | have_alloc_sem = 1; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1937 | } |
| 1938 | |
| 1939 | /* concurrent O_DIRECT writes are allowed */ |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1940 | rw_level = !direct_io; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1941 | ret = ocfs2_rw_lock(inode, rw_level); |
| 1942 | if (ret < 0) { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1943 | mlog_errno(ret); |
| 1944 | goto out_sems; |
| 1945 | } |
| 1946 | |
| 1947 | can_do_direct = direct_io; |
| 1948 | ret = ocfs2_prepare_inode_for_write(file->f_path.dentry, ppos, |
| 1949 | iocb->ki_left, appending, |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 1950 | &can_do_direct, &has_refcount); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1951 | if (ret < 0) { |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1952 | mlog_errno(ret); |
| 1953 | goto out; |
| 1954 | } |
| 1955 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1956 | /* |
| 1957 | * We can't complete the direct I/O as requested, fall back to |
| 1958 | * buffered I/O. |
| 1959 | */ |
| 1960 | if (direct_io && !can_do_direct) { |
| 1961 | ocfs2_rw_unlock(inode, rw_level); |
| 1962 | up_read(&inode->i_alloc_sem); |
| 1963 | |
| 1964 | have_alloc_sem = 0; |
| 1965 | rw_level = -1; |
| 1966 | |
| 1967 | direct_io = 0; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1968 | goto relock; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1969 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1970 | |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 1971 | /* |
| 1972 | * To later detect whether a journal commit for sync writes is |
| 1973 | * necessary, we sample i_size, and cluster count here. |
| 1974 | */ |
| 1975 | old_size = i_size_read(inode); |
| 1976 | old_clusters = OCFS2_I(inode)->ip_clusters; |
| 1977 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1978 | /* communicate with ocfs2_dio_end_io */ |
Mark Fasheh | 7cdfc3a | 2007-04-16 17:28:51 -0700 | [diff] [blame] | 1979 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1980 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1981 | if (direct_io) { |
Nick Piggin | b6af1bc | 2007-10-16 01:25:24 -0700 | [diff] [blame] | 1982 | ret = generic_segment_checks(iov, &nr_segs, &ocount, |
| 1983 | VERIFY_READ); |
| 1984 | if (ret) |
| 1985 | goto out_dio; |
| 1986 | |
Goldwyn Rodrigues | cefcb80 | 2009-07-11 10:57:27 -0500 | [diff] [blame] | 1987 | count = ocount; |
Nick Piggin | b6af1bc | 2007-10-16 01:25:24 -0700 | [diff] [blame] | 1988 | ret = generic_write_checks(file, ppos, &count, |
| 1989 | S_ISBLK(inode->i_mode)); |
| 1990 | if (ret) |
| 1991 | goto out_dio; |
| 1992 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1993 | written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos, |
| 1994 | ppos, count, ocount); |
| 1995 | if (written < 0) { |
Dmitri Monakhov | c435400 | 2008-10-27 13:01:49 -0700 | [diff] [blame] | 1996 | /* |
| 1997 | * direct write may have instantiated a few |
| 1998 | * blocks outside i_size. Trim these off again. |
| 1999 | * Don't need i_size_read because we hold i_mutex. |
| 2000 | */ |
| 2001 | if (*ppos + count > inode->i_size) |
| 2002 | vmtruncate(inode, inode->i_size); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2003 | ret = written; |
| 2004 | goto out_dio; |
| 2005 | } |
| 2006 | } else { |
Jan Kara | 918941a | 2009-08-17 18:50:08 +0200 | [diff] [blame] | 2007 | written = __generic_file_aio_write(iocb, iov, nr_segs, ppos); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2008 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2009 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2010 | out_dio: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2011 | /* buffered aio wouldn't have proper lock coverage today */ |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2012 | BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2013 | |
Tao Ma | 60c4867 | 2010-02-03 09:56:04 +0800 | [diff] [blame] | 2014 | if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) || |
| 2015 | ((file->f_flags & O_DIRECT) && has_refcount)) { |
Jan Kara | 918941a | 2009-08-17 18:50:08 +0200 | [diff] [blame] | 2016 | ret = filemap_fdatawrite_range(file->f_mapping, pos, |
| 2017 | pos + count - 1); |
| 2018 | if (ret < 0) |
| 2019 | written = ret; |
| 2020 | |
| 2021 | if (!ret && (old_size != i_size_read(inode) || |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2022 | old_clusters != OCFS2_I(inode)->ip_clusters || |
| 2023 | has_refcount)) { |
Joel Becker | 2b4e30f | 2008-09-03 20:03:41 -0700 | [diff] [blame] | 2024 | ret = jbd2_journal_force_commit(osb->journal->j_journal); |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2025 | if (ret < 0) |
| 2026 | written = ret; |
| 2027 | } |
Jan Kara | 918941a | 2009-08-17 18:50:08 +0200 | [diff] [blame] | 2028 | |
| 2029 | if (!ret) |
| 2030 | ret = filemap_fdatawait_range(file->f_mapping, pos, |
| 2031 | pos + count - 1); |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame] | 2032 | } |
| 2033 | |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2034 | /* |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2035 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io |
| 2036 | * function pointer which is called when o_direct io completes so that |
| 2037 | * it can unlock our rw lock. (it's the clustered equivalent of |
| 2038 | * i_alloc_sem; protects truncate from racing with pending ios). |
| 2039 | * Unfortunately there are error cases which call end_io and others |
| 2040 | * that don't. so we don't have to unlock the rw_lock if either an |
| 2041 | * async dio is going to do it in the future or an end_io after an |
| 2042 | * error has already done it. |
| 2043 | */ |
| 2044 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { |
| 2045 | rw_level = -1; |
| 2046 | have_alloc_sem = 0; |
| 2047 | } |
| 2048 | |
| 2049 | out: |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2050 | if (rw_level != -1) |
| 2051 | ocfs2_rw_unlock(inode, rw_level); |
| 2052 | |
| 2053 | out_sems: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2054 | if (have_alloc_sem) |
| 2055 | up_read(&inode->i_alloc_sem); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2056 | |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 2057 | mutex_unlock(&inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2058 | |
Wengang Wang | 812e7a6 | 2009-07-10 13:26:04 +0800 | [diff] [blame] | 2059 | if (written) |
| 2060 | ret = written; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2061 | mlog_exit(ret); |
Wengang Wang | 812e7a6 | 2009-07-10 13:26:04 +0800 | [diff] [blame] | 2062 | return ret; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2063 | } |
| 2064 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2065 | static int ocfs2_splice_to_file(struct pipe_inode_info *pipe, |
| 2066 | struct file *out, |
| 2067 | struct splice_desc *sd) |
| 2068 | { |
| 2069 | int ret; |
| 2070 | |
| 2071 | ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, &sd->pos, |
Tao Ma | 86470e9 | 2009-12-03 21:55:05 +0800 | [diff] [blame] | 2072 | sd->total_len, 0, NULL, NULL); |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2073 | if (ret < 0) { |
| 2074 | mlog_errno(ret); |
| 2075 | return ret; |
| 2076 | } |
| 2077 | |
| 2078 | return splice_from_pipe_feed(pipe, sd, pipe_to_file); |
| 2079 | } |
| 2080 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2081 | static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, |
| 2082 | struct file *out, |
| 2083 | loff_t *ppos, |
| 2084 | size_t len, |
| 2085 | unsigned int flags) |
| 2086 | { |
| 2087 | int ret; |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2088 | struct address_space *mapping = out->f_mapping; |
| 2089 | struct inode *inode = mapping->host; |
| 2090 | struct splice_desc sd = { |
| 2091 | .total_len = len, |
| 2092 | .flags = flags, |
| 2093 | .pos = *ppos, |
| 2094 | .u.file = out, |
| 2095 | }; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2096 | |
| 2097 | mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out, pipe, |
| 2098 | (unsigned int)len, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2099 | out->f_path.dentry->d_name.len, |
| 2100 | out->f_path.dentry->d_name.name); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2101 | |
Miklos Szeredi | 7bfac9e | 2009-04-06 17:41:00 +0200 | [diff] [blame] | 2102 | if (pipe->inode) |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2103 | mutex_lock_nested(&pipe->inode->i_mutex, I_MUTEX_PARENT); |
| 2104 | |
| 2105 | splice_from_pipe_begin(&sd); |
| 2106 | do { |
| 2107 | ret = splice_from_pipe_next(pipe, &sd); |
| 2108 | if (ret <= 0) |
| 2109 | break; |
| 2110 | |
| 2111 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); |
| 2112 | ret = ocfs2_rw_lock(inode, 1); |
| 2113 | if (ret < 0) |
| 2114 | mlog_errno(ret); |
| 2115 | else { |
| 2116 | ret = ocfs2_splice_to_file(pipe, out, &sd); |
| 2117 | ocfs2_rw_unlock(inode, 1); |
| 2118 | } |
| 2119 | mutex_unlock(&inode->i_mutex); |
| 2120 | } while (ret > 0); |
| 2121 | splice_from_pipe_end(pipe, &sd); |
| 2122 | |
Miklos Szeredi | 7bfac9e | 2009-04-06 17:41:00 +0200 | [diff] [blame] | 2123 | if (pipe->inode) |
| 2124 | mutex_unlock(&pipe->inode->i_mutex); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2125 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2126 | if (sd.num_spliced) |
| 2127 | ret = sd.num_spliced; |
| 2128 | |
| 2129 | if (ret > 0) { |
| 2130 | unsigned long nr_pages; |
Jan Kara | d23c937 | 2009-08-18 18:24:31 +0200 | [diff] [blame] | 2131 | int err; |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2132 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2133 | nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
| 2134 | |
Jan Kara | d23c937 | 2009-08-18 18:24:31 +0200 | [diff] [blame] | 2135 | err = generic_write_sync(out, *ppos, ret); |
| 2136 | if (err) |
| 2137 | ret = err; |
| 2138 | else |
| 2139 | *ppos += ret; |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2140 | |
Miklos Szeredi | 328eaab | 2009-04-14 19:48:39 +0200 | [diff] [blame] | 2141 | balance_dirty_pages_ratelimited_nr(mapping, nr_pages); |
| 2142 | } |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2143 | |
| 2144 | mlog_exit(ret); |
| 2145 | return ret; |
| 2146 | } |
| 2147 | |
| 2148 | static ssize_t ocfs2_file_splice_read(struct file *in, |
| 2149 | loff_t *ppos, |
| 2150 | struct pipe_inode_info *pipe, |
| 2151 | size_t len, |
| 2152 | unsigned int flags) |
| 2153 | { |
Tao Ma | 1962f39 | 2009-06-19 15:36:52 +0800 | [diff] [blame] | 2154 | int ret = 0, lock_level = 0; |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2155 | struct inode *inode = in->f_path.dentry->d_inode; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2156 | |
| 2157 | mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", in, pipe, |
| 2158 | (unsigned int)len, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2159 | in->f_path.dentry->d_name.len, |
| 2160 | in->f_path.dentry->d_name.name); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2161 | |
| 2162 | /* |
| 2163 | * See the comment in ocfs2_file_aio_read() |
| 2164 | */ |
Tao Ma | 1962f39 | 2009-06-19 15:36:52 +0800 | [diff] [blame] | 2165 | ret = ocfs2_inode_lock_atime(inode, in->f_vfsmnt, &lock_level); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2166 | if (ret < 0) { |
| 2167 | mlog_errno(ret); |
| 2168 | goto bail; |
| 2169 | } |
Tao Ma | 1962f39 | 2009-06-19 15:36:52 +0800 | [diff] [blame] | 2170 | ocfs2_inode_unlock(inode, lock_level); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2171 | |
| 2172 | ret = generic_file_splice_read(in, ppos, pipe, len, flags); |
| 2173 | |
| 2174 | bail: |
| 2175 | mlog_exit(ret); |
| 2176 | return ret; |
| 2177 | } |
| 2178 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2179 | static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 2180 | const struct iovec *iov, |
| 2181 | unsigned long nr_segs, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2182 | loff_t pos) |
| 2183 | { |
Tiger Yang | 25899de | 2006-11-15 15:49:02 +0800 | [diff] [blame] | 2184 | 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] | 2185 | struct file *filp = iocb->ki_filp; |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2186 | struct inode *inode = filp->f_path.dentry->d_inode; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2187 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 2188 | mlog_entry("(0x%p, %u, '%.*s')\n", filp, |
| 2189 | (unsigned int)nr_segs, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2190 | filp->f_path.dentry->d_name.len, |
| 2191 | filp->f_path.dentry->d_name.name); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2192 | |
| 2193 | if (!inode) { |
| 2194 | ret = -EINVAL; |
| 2195 | mlog_errno(ret); |
| 2196 | goto bail; |
| 2197 | } |
| 2198 | |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2199 | /* |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2200 | * buffered reads protect themselves in ->readpage(). O_DIRECT reads |
| 2201 | * need locks to protect pending reads from racing with truncate. |
| 2202 | */ |
| 2203 | if (filp->f_flags & O_DIRECT) { |
| 2204 | down_read(&inode->i_alloc_sem); |
| 2205 | have_alloc_sem = 1; |
| 2206 | |
| 2207 | ret = ocfs2_rw_lock(inode, 0); |
| 2208 | if (ret < 0) { |
| 2209 | mlog_errno(ret); |
| 2210 | goto bail; |
| 2211 | } |
| 2212 | rw_level = 0; |
| 2213 | /* communicate with ocfs2_dio_end_io */ |
Mark Fasheh | 7cdfc3a | 2007-04-16 17:28:51 -0700 | [diff] [blame] | 2214 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2215 | } |
| 2216 | |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2217 | /* |
| 2218 | * We're fine letting folks race truncates and extending |
| 2219 | * writes with read across the cluster, just like they can |
| 2220 | * locally. Hence no rw_lock during read. |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2221 | * |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2222 | * Take and drop the meta data lock to update inode fields |
| 2223 | * like i_size. This allows the checks down below |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2224 | * generic_file_aio_read() a chance of actually working. |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2225 | */ |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 2226 | ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level); |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2227 | if (ret < 0) { |
| 2228 | mlog_errno(ret); |
| 2229 | goto bail; |
| 2230 | } |
Mark Fasheh | e63aecb6 | 2007-10-18 15:30:42 -0700 | [diff] [blame] | 2231 | ocfs2_inode_unlock(inode, lock_level); |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2232 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 2233 | ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2234 | if (ret == -EINVAL) |
Sunil Mushran | 56753bd | 2008-06-09 11:24:41 -0700 | [diff] [blame] | 2235 | mlog(0, "generic_file_aio_read returned -EINVAL\n"); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2236 | |
| 2237 | /* buffered aio wouldn't have proper lock coverage today */ |
| 2238 | BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT)); |
| 2239 | |
| 2240 | /* see ocfs2_file_aio_write */ |
| 2241 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { |
| 2242 | rw_level = -1; |
| 2243 | have_alloc_sem = 0; |
| 2244 | } |
| 2245 | |
| 2246 | bail: |
| 2247 | if (have_alloc_sem) |
| 2248 | up_read(&inode->i_alloc_sem); |
Sunil Mushran | 2bd6321 | 2010-01-25 16:57:38 -0800 | [diff] [blame] | 2249 | if (rw_level != -1) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2250 | ocfs2_rw_unlock(inode, rw_level); |
| 2251 | mlog_exit(ret); |
| 2252 | |
| 2253 | return ret; |
| 2254 | } |
| 2255 | |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 2256 | const struct inode_operations ocfs2_file_iops = { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2257 | .setattr = ocfs2_setattr, |
| 2258 | .getattr = ocfs2_getattr, |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 2259 | .permission = ocfs2_permission, |
Tiger Yang | cf1d6c7 | 2008-08-18 17:11:00 +0800 | [diff] [blame] | 2260 | .setxattr = generic_setxattr, |
| 2261 | .getxattr = generic_getxattr, |
| 2262 | .listxattr = ocfs2_listxattr, |
| 2263 | .removexattr = generic_removexattr, |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 2264 | .fallocate = ocfs2_fallocate, |
Mark Fasheh | 00dc417 | 2008-10-03 17:32:11 -0400 | [diff] [blame] | 2265 | .fiemap = ocfs2_fiemap, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2266 | }; |
| 2267 | |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 2268 | const struct inode_operations ocfs2_special_file_iops = { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2269 | .setattr = ocfs2_setattr, |
| 2270 | .getattr = ocfs2_getattr, |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 2271 | .permission = ocfs2_permission, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2272 | }; |
| 2273 | |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2274 | /* |
| 2275 | * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with |
| 2276 | * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks! |
| 2277 | */ |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 2278 | const struct file_operations ocfs2_fops = { |
Jan Kara | 32c3c0e | 2007-12-19 15:24:52 +0100 | [diff] [blame] | 2279 | .llseek = generic_file_llseek, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2280 | .read = do_sync_read, |
| 2281 | .write = do_sync_write, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2282 | .mmap = ocfs2_mmap, |
| 2283 | .fsync = ocfs2_sync_file, |
| 2284 | .release = ocfs2_file_release, |
| 2285 | .open = ocfs2_file_open, |
| 2286 | .aio_read = ocfs2_file_aio_read, |
| 2287 | .aio_write = ocfs2_file_aio_write, |
Andi Kleen | c9ec148 | 2008-01-27 03:17:17 +0100 | [diff] [blame] | 2288 | .unlocked_ioctl = ocfs2_ioctl, |
Mark Fasheh | 586d232 | 2007-03-09 15:56:28 -0800 | [diff] [blame] | 2289 | #ifdef CONFIG_COMPAT |
| 2290 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2291 | #endif |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2292 | .lock = ocfs2_lock, |
| 2293 | .flock = ocfs2_flock, |
| 2294 | .splice_read = ocfs2_file_splice_read, |
| 2295 | .splice_write = ocfs2_file_splice_write, |
| 2296 | }; |
| 2297 | |
| 2298 | const struct file_operations ocfs2_dops = { |
| 2299 | .llseek = generic_file_llseek, |
| 2300 | .read = generic_read_dir, |
| 2301 | .readdir = ocfs2_readdir, |
| 2302 | .fsync = ocfs2_sync_file, |
| 2303 | .release = ocfs2_dir_release, |
| 2304 | .open = ocfs2_dir_open, |
| 2305 | .unlocked_ioctl = ocfs2_ioctl, |
| 2306 | #ifdef CONFIG_COMPAT |
| 2307 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2308 | #endif |
| 2309 | .lock = ocfs2_lock, |
| 2310 | .flock = ocfs2_flock, |
| 2311 | }; |
| 2312 | |
| 2313 | /* |
| 2314 | * POSIX-lockless variants of our file_operations. |
| 2315 | * |
| 2316 | * These will be used if the underlying cluster stack does not support |
| 2317 | * posix file locking, if the user passes the "localflocks" mount |
| 2318 | * option, or if we have a local-only fs. |
| 2319 | * |
| 2320 | * ocfs2_flock is in here because all stacks handle UNIX file locks, |
| 2321 | * so we still want it in the case of no stack support for |
| 2322 | * plocks. Internally, it will do the right thing when asked to ignore |
| 2323 | * the cluster. |
| 2324 | */ |
| 2325 | const struct file_operations ocfs2_fops_no_plocks = { |
| 2326 | .llseek = generic_file_llseek, |
| 2327 | .read = do_sync_read, |
| 2328 | .write = do_sync_write, |
| 2329 | .mmap = ocfs2_mmap, |
| 2330 | .fsync = ocfs2_sync_file, |
| 2331 | .release = ocfs2_file_release, |
| 2332 | .open = ocfs2_file_open, |
| 2333 | .aio_read = ocfs2_file_aio_read, |
| 2334 | .aio_write = ocfs2_file_aio_write, |
| 2335 | .unlocked_ioctl = ocfs2_ioctl, |
| 2336 | #ifdef CONFIG_COMPAT |
| 2337 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2338 | #endif |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 2339 | .flock = ocfs2_flock, |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2340 | .splice_read = ocfs2_file_splice_read, |
| 2341 | .splice_write = ocfs2_file_splice_write, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2342 | }; |
| 2343 | |
Mark Fasheh | 53da493 | 2008-07-21 14:29:16 -0700 | [diff] [blame] | 2344 | const struct file_operations ocfs2_dops_no_plocks = { |
Jan Kara | 32c3c0e | 2007-12-19 15:24:52 +0100 | [diff] [blame] | 2345 | .llseek = generic_file_llseek, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2346 | .read = generic_read_dir, |
| 2347 | .readdir = ocfs2_readdir, |
| 2348 | .fsync = ocfs2_sync_file, |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 2349 | .release = ocfs2_dir_release, |
| 2350 | .open = ocfs2_dir_open, |
Andi Kleen | c9ec148 | 2008-01-27 03:17:17 +0100 | [diff] [blame] | 2351 | .unlocked_ioctl = ocfs2_ioctl, |
Mark Fasheh | 586d232 | 2007-03-09 15:56:28 -0800 | [diff] [blame] | 2352 | #ifdef CONFIG_COMPAT |
| 2353 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2354 | #endif |
Mark Fasheh | 53fc622 | 2007-12-20 16:49:04 -0800 | [diff] [blame] | 2355 | .flock = ocfs2_flock, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2356 | }; |