blob: a5887df2cd8adce0f84a28a292a354a19c9fa4b5 [file] [log] [blame]
Mark Fashehccd979b2005-12-15 14:31:24 -08001/* -*- 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 Dunlap16f7e0f2006-01-11 12:17:46 -080026#include <linux/capability.h>
Mark Fashehccd979b2005-12-15 14:31:24 -080027#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 Fashehe2057c52006-10-03 17:53:05 -070033#include <linux/sched.h>
Jens Axboed6b29d72007-06-04 09:59:47 +020034#include <linux/splice.h>
Tiger Yang7f1a37e2006-11-15 15:48:42 +080035#include <linux/mount.h>
Mark Fasheh9517bac2007-02-09 20:24:12 -080036#include <linux/writeback.h>
Mark Fasheh385820a2007-07-19 00:14:38 -070037#include <linux/falloc.h>
Jan Karaa90714c2008-10-09 19:38:40 +020038#include <linux/quotaops.h>
Mark Fashehccd979b2005-12-15 14:31:24 -080039
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 Poetzlca4d1472006-07-03 17:27:12 -070053#include "ioctl.h"
Mark Fashehccd979b2005-12-15 14:31:24 -080054#include "journal.h"
Mark Fasheh53fc6222007-12-20 16:49:04 -080055#include "locks.h"
Mark Fashehccd979b2005-12-15 14:31:24 -080056#include "mmap.h"
57#include "suballoc.h"
58#include "super.h"
Tiger Yangcf1d6c72008-08-18 17:11:00 +080059#include "xattr.h"
Tiger Yang23fc2702008-11-14 11:17:18 +080060#include "acl.h"
Jan Karaa90714c2008-10-09 19:38:40 +020061#include "quota.h"
Mark Fashehccd979b2005-12-15 14:31:24 -080062
63#include "buffer_head_io.h"
64
65static int ocfs2_sync_inode(struct inode *inode)
66{
67 filemap_fdatawrite(inode->i_mapping);
68 return sync_mapping_buffers(inode->i_mapping);
69}
70
Mark Fasheh53fc6222007-12-20 16:49:04 -080071static int ocfs2_init_file_private(struct inode *inode, struct file *file)
72{
73 struct ocfs2_file_private *fp;
74
75 fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL);
76 if (!fp)
77 return -ENOMEM;
78
79 fp->fp_file = file;
80 mutex_init(&fp->fp_mutex);
81 ocfs2_file_lock_res_init(&fp->fp_flock, fp);
82 file->private_data = fp;
83
84 return 0;
85}
86
87static void ocfs2_free_file_private(struct inode *inode, struct file *file)
88{
89 struct ocfs2_file_private *fp = file->private_data;
90 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
91
92 if (fp) {
93 ocfs2_simple_drop_lockres(osb, &fp->fp_flock);
94 ocfs2_lock_res_free(&fp->fp_flock);
95 kfree(fp);
96 file->private_data = NULL;
97 }
98}
99
Mark Fashehccd979b2005-12-15 14:31:24 -0800100static int ocfs2_file_open(struct inode *inode, struct file *file)
101{
102 int status;
103 int mode = file->f_flags;
104 struct ocfs2_inode_info *oi = OCFS2_I(inode);
105
106 mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file,
Josef Sipekd28c9172006-12-08 02:37:25 -0800107 file->f_path.dentry->d_name.len, file->f_path.dentry->d_name.name);
Mark Fashehccd979b2005-12-15 14:31:24 -0800108
109 spin_lock(&oi->ip_lock);
110
111 /* Check that the inode hasn't been wiped from disk by another
112 * node. If it hasn't then we're safe as long as we hold the
113 * spin lock until our increment of open count. */
114 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
115 spin_unlock(&oi->ip_lock);
116
117 status = -ENOENT;
118 goto leave;
119 }
120
121 if (mode & O_DIRECT)
122 oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT;
123
124 oi->ip_open_count++;
125 spin_unlock(&oi->ip_lock);
Mark Fasheh53fc6222007-12-20 16:49:04 -0800126
127 status = ocfs2_init_file_private(inode, file);
128 if (status) {
129 /*
130 * We want to set open count back if we're failing the
131 * open.
132 */
133 spin_lock(&oi->ip_lock);
134 oi->ip_open_count--;
135 spin_unlock(&oi->ip_lock);
136 }
137
Mark Fashehccd979b2005-12-15 14:31:24 -0800138leave:
139 mlog_exit(status);
140 return status;
141}
142
143static int ocfs2_file_release(struct inode *inode, struct file *file)
144{
145 struct ocfs2_inode_info *oi = OCFS2_I(inode);
146
147 mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file,
Josef Sipekd28c9172006-12-08 02:37:25 -0800148 file->f_path.dentry->d_name.len,
149 file->f_path.dentry->d_name.name);
Mark Fashehccd979b2005-12-15 14:31:24 -0800150
151 spin_lock(&oi->ip_lock);
152 if (!--oi->ip_open_count)
153 oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT;
154 spin_unlock(&oi->ip_lock);
155
Mark Fasheh53fc6222007-12-20 16:49:04 -0800156 ocfs2_free_file_private(inode, file);
157
Mark Fashehccd979b2005-12-15 14:31:24 -0800158 mlog_exit(0);
159
160 return 0;
161}
162
Mark Fasheh53fc6222007-12-20 16:49:04 -0800163static int ocfs2_dir_open(struct inode *inode, struct file *file)
164{
165 return ocfs2_init_file_private(inode, file);
166}
167
168static int ocfs2_dir_release(struct inode *inode, struct file *file)
169{
170 ocfs2_free_file_private(inode, file);
171 return 0;
172}
173
Mark Fashehccd979b2005-12-15 14:31:24 -0800174static int ocfs2_sync_file(struct file *file,
175 struct dentry *dentry,
176 int datasync)
177{
178 int err = 0;
179 journal_t *journal;
180 struct inode *inode = dentry->d_inode;
181 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
182
183 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", file, dentry, datasync,
184 dentry->d_name.len, dentry->d_name.name);
185
186 err = ocfs2_sync_inode(dentry->d_inode);
187 if (err)
188 goto bail;
189
190 journal = osb->journal->j_journal;
Joel Becker2b4e30f2008-09-03 20:03:41 -0700191 err = jbd2_journal_force_commit(journal);
Mark Fashehccd979b2005-12-15 14:31:24 -0800192
193bail:
194 mlog_exit(err);
195
196 return (err < 0) ? -EIO : 0;
197}
198
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800199int ocfs2_should_update_atime(struct inode *inode,
200 struct vfsmount *vfsmnt)
201{
202 struct timespec now;
203 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
204
205 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
206 return 0;
207
208 if ((inode->i_flags & S_NOATIME) ||
209 ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
210 return 0;
211
Mark Fasheh6c2aad02006-12-19 15:25:52 -0800212 /*
213 * We can be called with no vfsmnt structure - NFSD will
214 * sometimes do this.
215 *
216 * Note that our action here is different than touch_atime() -
217 * if we can't tell whether this is a noatime mount, then we
218 * don't know whether to trust the value of s_atime_quantum.
219 */
220 if (vfsmnt == NULL)
221 return 0;
222
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800223 if ((vfsmnt->mnt_flags & MNT_NOATIME) ||
224 ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
225 return 0;
226
Mark Fasheh7e913c52006-12-13 00:34:35 -0800227 if (vfsmnt->mnt_flags & MNT_RELATIME) {
228 if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) ||
229 (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0))
230 return 1;
231
232 return 0;
233 }
234
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800235 now = CURRENT_TIME;
236 if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum))
237 return 0;
238 else
239 return 1;
240}
241
242int ocfs2_update_inode_atime(struct inode *inode,
243 struct buffer_head *bh)
244{
245 int ret;
246 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
247 handle_t *handle;
Mark Fashehc11e9fa2007-07-20 11:24:53 -0700248 struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data;
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800249
250 mlog_entry_void();
251
252 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
Jan Karafa38e922008-10-20 19:23:51 +0200253 if (IS_ERR(handle)) {
254 ret = PTR_ERR(handle);
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800255 mlog_errno(ret);
256 goto out;
257 }
258
Joel Becker13723d02008-10-17 19:25:01 -0700259 ret = ocfs2_journal_access_di(handle, inode, bh,
260 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehc11e9fa2007-07-20 11:24:53 -0700261 if (ret) {
262 mlog_errno(ret);
263 goto out_commit;
264 }
265
266 /*
267 * Don't use ocfs2_mark_inode_dirty() here as we don't always
268 * have i_mutex to guard against concurrent changes to other
269 * inode fields.
270 */
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800271 inode->i_atime = CURRENT_TIME;
Mark Fashehc11e9fa2007-07-20 11:24:53 -0700272 di->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
273 di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
274
275 ret = ocfs2_journal_dirty(handle, bh);
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800276 if (ret < 0)
277 mlog_errno(ret);
278
Mark Fashehc11e9fa2007-07-20 11:24:53 -0700279out_commit:
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800280 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
281out:
282 mlog_exit(ret);
283 return ret;
284}
285
Adrian Bunk6cb129f2007-04-26 00:29:35 -0700286static int ocfs2_set_inode_size(handle_t *handle,
287 struct inode *inode,
288 struct buffer_head *fe_bh,
289 u64 new_i_size)
Mark Fashehccd979b2005-12-15 14:31:24 -0800290{
291 int status;
292
293 mlog_entry_void();
294 i_size_write(inode, new_i_size);
Mark Fasheh8110b072007-03-22 16:53:23 -0700295 inode->i_blocks = ocfs2_inode_sector_count(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800296 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
297
298 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
299 if (status < 0) {
300 mlog_errno(status);
301 goto bail;
302 }
303
304bail:
305 mlog_exit(status);
306 return status;
307}
308
Jan Kara9e33d692008-08-25 19:56:50 +0200309int ocfs2_simple_size_update(struct inode *inode,
310 struct buffer_head *di_bh,
311 u64 new_i_size)
Mark Fashehccd979b2005-12-15 14:31:24 -0800312{
313 int ret;
314 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Mark Fasheh1fabe142006-10-09 18:11:45 -0700315 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800316
Mark Fasheh65eff9c2006-10-09 17:26:22 -0700317 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
Jan Karafa38e922008-10-20 19:23:51 +0200318 if (IS_ERR(handle)) {
319 ret = PTR_ERR(handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800320 mlog_errno(ret);
321 goto out;
322 }
323
324 ret = ocfs2_set_inode_size(handle, inode, di_bh,
325 new_i_size);
326 if (ret < 0)
327 mlog_errno(ret);
328
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700329 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800330out:
331 return ret;
332}
333
334static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb,
335 struct inode *inode,
336 struct buffer_head *fe_bh,
337 u64 new_i_size)
338{
339 int status;
Mark Fasheh1fabe142006-10-09 18:11:45 -0700340 handle_t *handle;
Mark Fasheh60b11392007-02-16 11:46:50 -0800341 struct ocfs2_dinode *di;
Mark Fasheh35edec12007-07-06 14:41:18 -0700342 u64 cluster_bytes;
Mark Fashehccd979b2005-12-15 14:31:24 -0800343
344 mlog_entry_void();
345
346 /* TODO: This needs to actually orphan the inode in this
347 * transaction. */
348
Mark Fasheh65eff9c2006-10-09 17:26:22 -0700349 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
Mark Fashehccd979b2005-12-15 14:31:24 -0800350 if (IS_ERR(handle)) {
351 status = PTR_ERR(handle);
352 mlog_errno(status);
353 goto out;
354 }
355
Joel Becker13723d02008-10-17 19:25:01 -0700356 status = ocfs2_journal_access_di(handle, inode, fe_bh,
357 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fasheh60b11392007-02-16 11:46:50 -0800358 if (status < 0) {
359 mlog_errno(status);
360 goto out_commit;
361 }
362
363 /*
364 * Do this before setting i_size.
365 */
Mark Fasheh35edec12007-07-06 14:41:18 -0700366 cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
367 status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size,
368 cluster_bytes);
Mark Fasheh60b11392007-02-16 11:46:50 -0800369 if (status) {
370 mlog_errno(status);
371 goto out_commit;
372 }
373
374 i_size_write(inode, new_i_size);
Mark Fasheh60b11392007-02-16 11:46:50 -0800375 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
376
377 di = (struct ocfs2_dinode *) fe_bh->b_data;
378 di->i_size = cpu_to_le64(new_i_size);
379 di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec);
380 di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
381
382 status = ocfs2_journal_dirty(handle, fe_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800383 if (status < 0)
384 mlog_errno(status);
385
Mark Fasheh60b11392007-02-16 11:46:50 -0800386out_commit:
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700387 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800388out:
Mark Fasheh60b11392007-02-16 11:46:50 -0800389
Mark Fashehccd979b2005-12-15 14:31:24 -0800390 mlog_exit(status);
391 return status;
392}
393
394static int ocfs2_truncate_file(struct inode *inode,
395 struct buffer_head *di_bh,
396 u64 new_i_size)
397{
398 int status = 0;
399 struct ocfs2_dinode *fe = NULL;
400 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
401 struct ocfs2_truncate_context *tc = NULL;
402
Mark Fashehb06970532006-03-03 10:24:33 -0800403 mlog_entry("(inode = %llu, new_i_size = %llu\n",
404 (unsigned long long)OCFS2_I(inode)->ip_blkno,
405 (unsigned long long)new_i_size);
Mark Fashehccd979b2005-12-15 14:31:24 -0800406
Joel Beckerb657c952008-11-13 14:49:11 -0800407 /* We trust di_bh because it comes from ocfs2_inode_lock(), which
408 * already validated it */
Mark Fashehccd979b2005-12-15 14:31:24 -0800409 fe = (struct ocfs2_dinode *) di_bh->b_data;
Mark Fashehccd979b2005-12-15 14:31:24 -0800410
411 mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode),
Mark Fashehb06970532006-03-03 10:24:33 -0800412 "Inode %llu, inode i_size = %lld != di "
413 "i_size = %llu, i_flags = 0x%x\n",
414 (unsigned long long)OCFS2_I(inode)->ip_blkno,
Mark Fashehccd979b2005-12-15 14:31:24 -0800415 i_size_read(inode),
Mark Fashehb06970532006-03-03 10:24:33 -0800416 (unsigned long long)le64_to_cpu(fe->i_size),
417 le32_to_cpu(fe->i_flags));
Mark Fashehccd979b2005-12-15 14:31:24 -0800418
419 if (new_i_size > le64_to_cpu(fe->i_size)) {
Mark Fashehb06970532006-03-03 10:24:33 -0800420 mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n",
421 (unsigned long long)le64_to_cpu(fe->i_size),
422 (unsigned long long)new_i_size);
Mark Fashehccd979b2005-12-15 14:31:24 -0800423 status = -EINVAL;
424 mlog_errno(status);
425 goto bail;
426 }
427
Mark Fashehb06970532006-03-03 10:24:33 -0800428 mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n",
429 (unsigned long long)le64_to_cpu(fe->i_blkno),
430 (unsigned long long)le64_to_cpu(fe->i_size),
431 (unsigned long long)new_i_size);
Mark Fashehccd979b2005-12-15 14:31:24 -0800432
433 /* lets handle the simple truncate cases before doing any more
434 * cluster locking. */
435 if (new_i_size == le64_to_cpu(fe->i_size))
436 goto bail;
437
Mark Fasheh2e89b2e2007-05-09 13:40:18 -0700438 down_write(&OCFS2_I(inode)->ip_alloc_sem);
439
Mark Fashehc934a922007-10-18 15:23:46 -0700440 /*
441 * The inode lock forced other nodes to sync and drop their
442 * pages, which (correctly) happens even if we have a truncate
443 * without allocation change - ocfs2 cluster sizes can be much
444 * greater than page size, so we have to truncate them
445 * anyway.
446 */
Mark Fasheh2e89b2e2007-05-09 13:40:18 -0700447 unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
448 truncate_inode_pages(inode->i_mapping, new_i_size);
449
Mark Fasheh1afc32b2007-09-07 14:46:51 -0700450 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
451 status = ocfs2_truncate_inline(inode, di_bh, new_i_size,
Mark Fashehb1967d02007-11-20 11:56:39 -0800452 i_size_read(inode), 1);
Mark Fasheh1afc32b2007-09-07 14:46:51 -0700453 if (status)
454 mlog_errno(status);
455
Mark Fashehc934a922007-10-18 15:23:46 -0700456 goto bail_unlock_sem;
Mark Fasheh1afc32b2007-09-07 14:46:51 -0700457 }
458
Mark Fashehccd979b2005-12-15 14:31:24 -0800459 /* alright, we're going to need to do a full blown alloc size
460 * change. Orphan the inode so that recovery can complete the
461 * truncate if necessary. This does the task of marking
462 * i_size. */
463 status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size);
464 if (status < 0) {
465 mlog_errno(status);
Mark Fashehc934a922007-10-18 15:23:46 -0700466 goto bail_unlock_sem;
Mark Fashehccd979b2005-12-15 14:31:24 -0800467 }
468
469 status = ocfs2_prepare_truncate(osb, inode, di_bh, &tc);
470 if (status < 0) {
471 mlog_errno(status);
Mark Fashehc934a922007-10-18 15:23:46 -0700472 goto bail_unlock_sem;
Mark Fashehccd979b2005-12-15 14:31:24 -0800473 }
474
475 status = ocfs2_commit_truncate(osb, inode, di_bh, tc);
476 if (status < 0) {
477 mlog_errno(status);
Mark Fashehc934a922007-10-18 15:23:46 -0700478 goto bail_unlock_sem;
Mark Fashehccd979b2005-12-15 14:31:24 -0800479 }
480
481 /* TODO: orphan dir cleanup here. */
Mark Fashehc934a922007-10-18 15:23:46 -0700482bail_unlock_sem:
Mark Fasheh2e89b2e2007-05-09 13:40:18 -0700483 up_write(&OCFS2_I(inode)->ip_alloc_sem);
484
Mark Fashehccd979b2005-12-15 14:31:24 -0800485bail:
486
487 mlog_exit(status);
488 return status;
489}
490
491/*
Tao Ma0eb8d472008-08-18 17:38:45 +0800492 * extend file allocation only here.
Mark Fashehccd979b2005-12-15 14:31:24 -0800493 * we'll update all the disk stuff, and oip->alloc_size
494 *
495 * expect stuff to be locked, a transaction started and enough data /
496 * metadata reservations in the contexts.
497 *
498 * Will return -EAGAIN, and a reason if a restart is needed.
499 * If passed in, *reason will always be set, even in error.
500 */
Tao Ma0eb8d472008-08-18 17:38:45 +0800501int ocfs2_add_inode_data(struct ocfs2_super *osb,
502 struct inode *inode,
503 u32 *logical_offset,
504 u32 clusters_to_add,
505 int mark_unwritten,
506 struct buffer_head *fe_bh,
507 handle_t *handle,
508 struct ocfs2_alloc_context *data_ac,
509 struct ocfs2_alloc_context *meta_ac,
510 enum ocfs2_alloc_restarted *reason_ret)
Mark Fashehccd979b2005-12-15 14:31:24 -0800511{
Joel Beckerf99b9b72008-08-20 19:36:33 -0700512 int ret;
513 struct ocfs2_extent_tree et;
Mark Fashehccd979b2005-12-15 14:31:24 -0800514
Joel Becker8d6220d2008-08-22 12:46:09 -0700515 ocfs2_init_dinode_extent_tree(&et, inode, fe_bh);
Joel Beckerf99b9b72008-08-20 19:36:33 -0700516 ret = ocfs2_add_clusters_in_btree(osb, inode, logical_offset,
Tao Ma0eb8d472008-08-18 17:38:45 +0800517 clusters_to_add, mark_unwritten,
Joel Beckerf99b9b72008-08-20 19:36:33 -0700518 &et, handle,
519 data_ac, meta_ac, reason_ret);
Joel Beckerf99b9b72008-08-20 19:36:33 -0700520
521 return ret;
Mark Fashehccd979b2005-12-15 14:31:24 -0800522}
523
Mark Fasheh2ae99a62007-03-09 16:43:28 -0800524static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
525 u32 clusters_to_add, int mark_unwritten)
Mark Fashehccd979b2005-12-15 14:31:24 -0800526{
527 int status = 0;
528 int restart_func = 0;
Mark Fashehabf8b152007-01-17 13:07:24 -0800529 int credits;
Mark Fasheh2ae99a62007-03-09 16:43:28 -0800530 u32 prev_clusters;
Mark Fashehccd979b2005-12-15 14:31:24 -0800531 struct buffer_head *bh = NULL;
532 struct ocfs2_dinode *fe = NULL;
Mark Fasheh1fabe142006-10-09 18:11:45 -0700533 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800534 struct ocfs2_alloc_context *data_ac = NULL;
535 struct ocfs2_alloc_context *meta_ac = NULL;
536 enum ocfs2_alloc_restarted why;
537 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Joel Beckerf99b9b72008-08-20 19:36:33 -0700538 struct ocfs2_extent_tree et;
Jan Karaa90714c2008-10-09 19:38:40 +0200539 int did_quota = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -0800540
541 mlog_entry("(clusters_to_add = %u)\n", clusters_to_add);
542
Mark Fashehdcd05382007-01-16 11:32:23 -0800543 /*
544 * This function only exists for file systems which don't
545 * support holes.
546 */
Mark Fasheh2ae99a62007-03-09 16:43:28 -0800547 BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb));
Mark Fashehdcd05382007-01-16 11:32:23 -0800548
Joel Beckerb657c952008-11-13 14:49:11 -0800549 status = ocfs2_read_inode_block(inode, &bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800550 if (status < 0) {
551 mlog_errno(status);
552 goto leave;
553 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800554 fe = (struct ocfs2_dinode *) bh->b_data;
Mark Fashehccd979b2005-12-15 14:31:24 -0800555
556restart_all:
557 BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters);
558
Tao Mae7d4cb62008-08-18 17:38:44 +0800559 mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, "
560 "clusters_to_add = %u\n",
561 (unsigned long long)OCFS2_I(inode)->ip_blkno,
562 (long long)i_size_read(inode), le32_to_cpu(fe->i_clusters),
563 clusters_to_add);
Joel Becker8d6220d2008-08-22 12:46:09 -0700564 ocfs2_init_dinode_extent_tree(&et, inode, bh);
Joel Beckerf99b9b72008-08-20 19:36:33 -0700565 status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
566 &data_ac, &meta_ac);
Mark Fasheh9517bac2007-02-09 20:24:12 -0800567 if (status) {
568 mlog_errno(status);
569 goto leave;
570 }
571
Tao Ma811f9332008-08-18 17:38:43 +0800572 credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list,
573 clusters_to_add);
Mark Fasheh65eff9c2006-10-09 17:26:22 -0700574 handle = ocfs2_start_trans(osb, credits);
Mark Fashehccd979b2005-12-15 14:31:24 -0800575 if (IS_ERR(handle)) {
576 status = PTR_ERR(handle);
577 handle = NULL;
578 mlog_errno(status);
579 goto leave;
580 }
581
582restarted_transaction:
Jan Karaa90714c2008-10-09 19:38:40 +0200583 if (vfs_dq_alloc_space_nodirty(inode, ocfs2_clusters_to_bytes(osb->sb,
584 clusters_to_add))) {
585 status = -EDQUOT;
586 goto leave;
587 }
588 did_quota = 1;
589
Mark Fashehccd979b2005-12-15 14:31:24 -0800590 /* reserve a write to the file entry early on - that we if we
591 * run out of credits in the allocation path, we can still
592 * update i_size. */
Joel Becker13723d02008-10-17 19:25:01 -0700593 status = ocfs2_journal_access_di(handle, inode, bh,
594 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -0800595 if (status < 0) {
596 mlog_errno(status);
597 goto leave;
598 }
599
600 prev_clusters = OCFS2_I(inode)->ip_clusters;
601
Tao Ma0eb8d472008-08-18 17:38:45 +0800602 status = ocfs2_add_inode_data(osb,
603 inode,
604 &logical_start,
605 clusters_to_add,
606 mark_unwritten,
607 bh,
608 handle,
609 data_ac,
610 meta_ac,
611 &why);
Mark Fashehccd979b2005-12-15 14:31:24 -0800612 if ((status < 0) && (status != -EAGAIN)) {
613 if (status != -ENOSPC)
614 mlog_errno(status);
615 goto leave;
616 }
617
618 status = ocfs2_journal_dirty(handle, bh);
619 if (status < 0) {
620 mlog_errno(status);
621 goto leave;
622 }
623
624 spin_lock(&OCFS2_I(inode)->ip_lock);
625 clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters);
626 spin_unlock(&OCFS2_I(inode)->ip_lock);
Jan Karaa90714c2008-10-09 19:38:40 +0200627 /* Release unused quota reservation */
628 vfs_dq_free_space(inode,
629 ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
630 did_quota = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -0800631
632 if (why != RESTART_NONE && clusters_to_add) {
633 if (why == RESTART_META) {
634 mlog(0, "restarting function.\n");
635 restart_func = 1;
636 } else {
637 BUG_ON(why != RESTART_TRANS);
638
639 mlog(0, "restarting transaction.\n");
640 /* TODO: This can be more intelligent. */
641 credits = ocfs2_calc_extend_credits(osb->sb,
Tao Ma811f9332008-08-18 17:38:43 +0800642 &fe->id2.i_list,
Mark Fashehccd979b2005-12-15 14:31:24 -0800643 clusters_to_add);
Mark Fasheh1fabe142006-10-09 18:11:45 -0700644 status = ocfs2_extend_trans(handle, credits);
Mark Fashehccd979b2005-12-15 14:31:24 -0800645 if (status < 0) {
646 /* handle still has to be committed at
647 * this point. */
648 status = -ENOMEM;
649 mlog_errno(status);
650 goto leave;
651 }
652 goto restarted_transaction;
653 }
654 }
655
Mark Fashehb06970532006-03-03 10:24:33 -0800656 mlog(0, "fe: i_clusters = %u, i_size=%llu\n",
Mark Fasheh1ca1a112007-04-27 16:01:25 -0700657 le32_to_cpu(fe->i_clusters),
658 (unsigned long long)le64_to_cpu(fe->i_size));
Mark Fashehccd979b2005-12-15 14:31:24 -0800659 mlog(0, "inode: ip_clusters=%u, i_size=%lld\n",
Jan Kara634bf742007-12-19 15:25:42 +0100660 OCFS2_I(inode)->ip_clusters, (long long)i_size_read(inode));
Mark Fashehccd979b2005-12-15 14:31:24 -0800661
662leave:
Jan Karaa90714c2008-10-09 19:38:40 +0200663 if (status < 0 && did_quota)
664 vfs_dq_free_space(inode,
665 ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
Mark Fashehccd979b2005-12-15 14:31:24 -0800666 if (handle) {
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700667 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800668 handle = NULL;
669 }
670 if (data_ac) {
671 ocfs2_free_alloc_context(data_ac);
672 data_ac = NULL;
673 }
674 if (meta_ac) {
675 ocfs2_free_alloc_context(meta_ac);
676 meta_ac = NULL;
677 }
678 if ((!status) && restart_func) {
679 restart_func = 0;
680 goto restart_all;
681 }
Mark Fasheha81cb882008-10-07 14:25:16 -0700682 brelse(bh);
683 bh = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800684
685 mlog_exit(status);
686 return status;
687}
688
689/* Some parts of this taken from generic_cont_expand, which turned out
690 * to be too fragile to do exactly what we need without us having to
Nick Piggin4e02ed42008-10-29 14:00:55 -0700691 * worry about recursive locking in ->write_begin() and ->write_end(). */
Mark Fashehccd979b2005-12-15 14:31:24 -0800692static int ocfs2_write_zero_page(struct inode *inode,
693 u64 size)
694{
695 struct address_space *mapping = inode->i_mapping;
696 struct page *page;
697 unsigned long index;
698 unsigned int offset;
Mark Fasheh1fabe142006-10-09 18:11:45 -0700699 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800700 int ret;
701
702 offset = (size & (PAGE_CACHE_SIZE-1)); /* Within page */
703 /* ugh. in prepare/commit_write, if from==to==start of block, we
704 ** skip the prepare. make sure we never send an offset for the start
705 ** of a block
706 */
707 if ((offset & (inode->i_sb->s_blocksize - 1)) == 0) {
708 offset++;
709 }
710 index = size >> PAGE_CACHE_SHIFT;
711
712 page = grab_cache_page(mapping, index);
713 if (!page) {
714 ret = -ENOMEM;
715 mlog_errno(ret);
716 goto out;
717 }
718
Mark Fasheh53013cb2006-05-05 19:04:03 -0700719 ret = ocfs2_prepare_write_nolock(inode, page, offset, offset);
Mark Fashehccd979b2005-12-15 14:31:24 -0800720 if (ret < 0) {
721 mlog_errno(ret);
722 goto out_unlock;
723 }
724
725 if (ocfs2_should_order_data(inode)) {
726 handle = ocfs2_start_walk_page_trans(inode, page, offset,
727 offset);
728 if (IS_ERR(handle)) {
729 ret = PTR_ERR(handle);
730 handle = NULL;
731 goto out_unlock;
732 }
733 }
734
735 /* must not update i_size! */
736 ret = block_commit_write(page, offset, offset);
737 if (ret < 0)
738 mlog_errno(ret);
739 else
740 ret = 0;
741
742 if (handle)
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700743 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800744out_unlock:
745 unlock_page(page);
746 page_cache_release(page);
747out:
748 return ret;
749}
750
751static int ocfs2_zero_extend(struct inode *inode,
752 u64 zero_to_size)
753{
754 int ret = 0;
755 u64 start_off;
756 struct super_block *sb = inode->i_sb;
757
758 start_off = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode));
759 while (start_off < zero_to_size) {
760 ret = ocfs2_write_zero_page(inode, start_off);
761 if (ret < 0) {
762 mlog_errno(ret);
763 goto out;
764 }
765
766 start_off += sb->s_blocksize;
Mark Fashehe2057c52006-10-03 17:53:05 -0700767
768 /*
769 * Very large extends have the potential to lock up
770 * the cpu for extended periods of time.
771 */
772 cond_resched();
Mark Fashehccd979b2005-12-15 14:31:24 -0800773 }
774
775out:
776 return ret;
777}
778
Mark Fasheh65ed39d2007-08-28 17:13:23 -0700779int ocfs2_extend_no_holes(struct inode *inode, u64 new_i_size, u64 zero_to)
780{
781 int ret;
782 u32 clusters_to_add;
783 struct ocfs2_inode_info *oi = OCFS2_I(inode);
784
785 clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size);
786 if (clusters_to_add < oi->ip_clusters)
787 clusters_to_add = 0;
788 else
789 clusters_to_add -= oi->ip_clusters;
790
791 if (clusters_to_add) {
792 ret = __ocfs2_extend_allocation(inode, oi->ip_clusters,
793 clusters_to_add, 0);
794 if (ret) {
795 mlog_errno(ret);
796 goto out;
797 }
798 }
799
800 /*
801 * Call this even if we don't add any clusters to the tree. We
802 * still need to zero the area between the old i_size and the
803 * new i_size.
804 */
805 ret = ocfs2_zero_extend(inode, zero_to);
806 if (ret < 0)
807 mlog_errno(ret);
808
809out:
810 return ret;
811}
812
Mark Fashehccd979b2005-12-15 14:31:24 -0800813static int ocfs2_extend_file(struct inode *inode,
814 struct buffer_head *di_bh,
Mark Fasheh65ed39d2007-08-28 17:13:23 -0700815 u64 new_i_size)
Mark Fashehccd979b2005-12-15 14:31:24 -0800816{
Mark Fashehc934a922007-10-18 15:23:46 -0700817 int ret = 0;
Mark Fasheh1afc32b2007-09-07 14:46:51 -0700818 struct ocfs2_inode_info *oi = OCFS2_I(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800819
Mark Fasheh65ed39d2007-08-28 17:13:23 -0700820 BUG_ON(!di_bh);
Mark Fasheh53013cb2006-05-05 19:04:03 -0700821
Mark Fashehccd979b2005-12-15 14:31:24 -0800822 /* setattr sometimes calls us like this. */
823 if (new_i_size == 0)
824 goto out;
825
826 if (i_size_read(inode) == new_i_size)
827 goto out;
828 BUG_ON(new_i_size < i_size_read(inode));
829
Mark Fasheh1afc32b2007-09-07 14:46:51 -0700830 /*
831 * Fall through for converting inline data, even if the fs
832 * supports sparse files.
833 *
834 * The check for inline data here is legal - nobody can add
835 * the feature since we have i_mutex. We must check it again
836 * after acquiring ip_alloc_sem though, as paths like mmap
837 * might have raced us to converting the inode to extents.
838 */
839 if (!(oi->ip_dyn_features & OCFS2_INLINE_DATA_FL)
840 && ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
Mark Fasheh3a0782d2007-01-17 12:53:31 -0800841 goto out_update_size;
Mark Fashehccd979b2005-12-15 14:31:24 -0800842
Mark Fasheh0effef72006-10-03 17:44:42 -0700843 /*
Mark Fasheh65ed39d2007-08-28 17:13:23 -0700844 * The alloc sem blocks people in read/write from reading our
845 * allocation until we're done changing it. We depend on
846 * i_mutex to block other extend/truncate calls while we're
847 * here.
Mark Fasheh0effef72006-10-03 17:44:42 -0700848 */
Mark Fasheh1afc32b2007-09-07 14:46:51 -0700849 down_write(&oi->ip_alloc_sem);
850
851 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
852 /*
853 * We can optimize small extends by keeping the inodes
854 * inline data.
855 */
856 if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) {
857 up_write(&oi->ip_alloc_sem);
858 goto out_update_size;
859 }
860
861 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
862 if (ret) {
863 up_write(&oi->ip_alloc_sem);
864
865 mlog_errno(ret);
Mark Fashehc934a922007-10-18 15:23:46 -0700866 goto out;
Mark Fasheh1afc32b2007-09-07 14:46:51 -0700867 }
868 }
869
870 if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
871 ret = ocfs2_extend_no_holes(inode, new_i_size, new_i_size);
872
873 up_write(&oi->ip_alloc_sem);
Mark Fasheh65ed39d2007-08-28 17:13:23 -0700874
Mark Fasheh0effef72006-10-03 17:44:42 -0700875 if (ret < 0) {
876 mlog_errno(ret);
Mark Fashehc934a922007-10-18 15:23:46 -0700877 goto out;
Mark Fashehccd979b2005-12-15 14:31:24 -0800878 }
879
Mark Fasheh3a0782d2007-01-17 12:53:31 -0800880out_update_size:
Mark Fasheh65ed39d2007-08-28 17:13:23 -0700881 ret = ocfs2_simple_size_update(inode, di_bh, new_i_size);
882 if (ret < 0)
883 mlog_errno(ret);
Mark Fasheh53013cb2006-05-05 19:04:03 -0700884
Mark Fashehccd979b2005-12-15 14:31:24 -0800885out:
886 return ret;
887}
888
889int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
890{
891 int status = 0, size_change;
892 struct inode *inode = dentry->d_inode;
893 struct super_block *sb = inode->i_sb;
894 struct ocfs2_super *osb = OCFS2_SB(sb);
895 struct buffer_head *bh = NULL;
Mark Fasheh1fabe142006-10-09 18:11:45 -0700896 handle_t *handle = NULL;
Jan Karaa90714c2008-10-09 19:38:40 +0200897 int locked[MAXQUOTAS] = {0, 0};
898 int credits, qtype;
899 struct ocfs2_mem_dqinfo *oinfo;
Mark Fashehccd979b2005-12-15 14:31:24 -0800900
901 mlog_entry("(0x%p, '%.*s')\n", dentry,
902 dentry->d_name.len, dentry->d_name.name);
903
Sunil Mushranbc535802008-04-18 10:23:53 -0700904 /* ensuring we don't even attempt to truncate a symlink */
905 if (S_ISLNK(inode->i_mode))
906 attr->ia_valid &= ~ATTR_SIZE;
907
Mark Fashehccd979b2005-12-15 14:31:24 -0800908 if (attr->ia_valid & ATTR_MODE)
909 mlog(0, "mode change: %d\n", attr->ia_mode);
910 if (attr->ia_valid & ATTR_UID)
911 mlog(0, "uid change: %d\n", attr->ia_uid);
912 if (attr->ia_valid & ATTR_GID)
913 mlog(0, "gid change: %d\n", attr->ia_gid);
914 if (attr->ia_valid & ATTR_SIZE)
915 mlog(0, "size change...\n");
916 if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME))
917 mlog(0, "time change...\n");
918
919#define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \
920 | ATTR_GID | ATTR_UID | ATTR_MODE)
921 if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) {
922 mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid);
923 return 0;
924 }
925
926 status = inode_change_ok(inode, attr);
927 if (status)
928 return status;
929
930 size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE;
931 if (size_change) {
932 status = ocfs2_rw_lock(inode, 1);
933 if (status < 0) {
934 mlog_errno(status);
935 goto bail;
936 }
937 }
938
Mark Fashehe63aecb62007-10-18 15:30:42 -0700939 status = ocfs2_inode_lock(inode, &bh, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -0800940 if (status < 0) {
941 if (status != -ENOENT)
942 mlog_errno(status);
943 goto bail_unlock_rw;
944 }
945
946 if (size_change && attr->ia_size != i_size_read(inode)) {
Mark Fashehce76fd32007-07-20 12:02:14 -0700947 if (attr->ia_size > sb->s_maxbytes) {
948 status = -EFBIG;
949 goto bail_unlock;
950 }
951
Joel Becker2b4e30f2008-09-03 20:03:41 -0700952 if (i_size_read(inode) > attr->ia_size) {
953 if (ocfs2_should_order_data(inode)) {
954 status = ocfs2_begin_ordered_truncate(inode,
955 attr->ia_size);
956 if (status)
957 goto bail_unlock;
958 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800959 status = ocfs2_truncate_file(inode, bh, attr->ia_size);
Joel Becker2b4e30f2008-09-03 20:03:41 -0700960 } else
Mark Fasheh65ed39d2007-08-28 17:13:23 -0700961 status = ocfs2_extend_file(inode, bh, attr->ia_size);
Mark Fashehccd979b2005-12-15 14:31:24 -0800962 if (status < 0) {
963 if (status != -ENOSPC)
964 mlog_errno(status);
965 status = -ENOSPC;
966 goto bail_unlock;
967 }
968 }
969
Jan Karaa90714c2008-10-09 19:38:40 +0200970 if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
971 (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
972 credits = OCFS2_INODE_UPDATE_CREDITS;
973 if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid
974 && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
975 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
976 oinfo = sb_dqinfo(sb, USRQUOTA)->dqi_priv;
977 status = ocfs2_lock_global_qf(oinfo, 1);
978 if (status < 0)
979 goto bail_unlock;
980 credits += ocfs2_calc_qinit_credits(sb, USRQUOTA) +
981 ocfs2_calc_qdel_credits(sb, USRQUOTA);
982 locked[USRQUOTA] = 1;
983 }
984 if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid
985 && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
986 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
987 oinfo = sb_dqinfo(sb, GRPQUOTA)->dqi_priv;
988 status = ocfs2_lock_global_qf(oinfo, 1);
989 if (status < 0)
990 goto bail_unlock;
991 credits += ocfs2_calc_qinit_credits(sb, GRPQUOTA) +
992 ocfs2_calc_qdel_credits(sb, GRPQUOTA);
993 locked[GRPQUOTA] = 1;
994 }
995 handle = ocfs2_start_trans(osb, credits);
996 if (IS_ERR(handle)) {
997 status = PTR_ERR(handle);
998 mlog_errno(status);
999 goto bail_unlock;
1000 }
1001 status = vfs_dq_transfer(inode, attr) ? -EDQUOT : 0;
1002 if (status < 0)
1003 goto bail_commit;
1004 } else {
1005 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1006 if (IS_ERR(handle)) {
1007 status = PTR_ERR(handle);
1008 mlog_errno(status);
1009 goto bail_unlock;
1010 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001011 }
1012
Mark Fasheh7307de82007-05-09 15:16:19 -07001013 /*
1014 * This will intentionally not wind up calling vmtruncate(),
1015 * since all the work for a size change has been done above.
1016 * Otherwise, we could get into problems with truncate as
1017 * ip_alloc_sem is used there to protect against i_size
1018 * changes.
1019 */
Mark Fashehccd979b2005-12-15 14:31:24 -08001020 status = inode_setattr(inode, attr);
1021 if (status < 0) {
1022 mlog_errno(status);
1023 goto bail_commit;
1024 }
1025
1026 status = ocfs2_mark_inode_dirty(handle, inode, bh);
1027 if (status < 0)
1028 mlog_errno(status);
1029
1030bail_commit:
Mark Fasheh02dc1af2006-10-09 16:48:10 -07001031 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -08001032bail_unlock:
Jan Karaa90714c2008-10-09 19:38:40 +02001033 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1034 if (!locked[qtype])
1035 continue;
1036 oinfo = sb_dqinfo(sb, qtype)->dqi_priv;
1037 ocfs2_unlock_global_qf(oinfo, 1);
1038 }
Mark Fashehe63aecb62007-10-18 15:30:42 -07001039 ocfs2_inode_unlock(inode, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -08001040bail_unlock_rw:
1041 if (size_change)
1042 ocfs2_rw_unlock(inode, 1);
1043bail:
Mark Fasheha81cb882008-10-07 14:25:16 -07001044 brelse(bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08001045
Tiger Yang060bc662008-11-14 11:17:29 +08001046 if (!status && attr->ia_valid & ATTR_MODE) {
1047 status = ocfs2_acl_chmod(inode);
1048 if (status < 0)
1049 mlog_errno(status);
1050 }
1051
Mark Fashehccd979b2005-12-15 14:31:24 -08001052 mlog_exit(status);
1053 return status;
1054}
1055
1056int ocfs2_getattr(struct vfsmount *mnt,
1057 struct dentry *dentry,
1058 struct kstat *stat)
1059{
1060 struct inode *inode = dentry->d_inode;
1061 struct super_block *sb = dentry->d_inode->i_sb;
1062 struct ocfs2_super *osb = sb->s_fs_info;
1063 int err;
1064
1065 mlog_entry_void();
1066
1067 err = ocfs2_inode_revalidate(dentry);
1068 if (err) {
1069 if (err != -ENOENT)
1070 mlog_errno(err);
1071 goto bail;
1072 }
1073
1074 generic_fillattr(inode, stat);
1075
1076 /* We set the blksize from the cluster size for performance */
1077 stat->blksize = osb->s_clustersize;
1078
1079bail:
1080 mlog_exit(err);
1081
1082 return err;
1083}
1084
Al Viroe6305c42008-07-15 21:03:57 -04001085int ocfs2_permission(struct inode *inode, int mask)
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001086{
1087 int ret;
1088
1089 mlog_entry_void();
1090
Mark Fashehe63aecb62007-10-18 15:30:42 -07001091 ret = ocfs2_inode_lock(inode, NULL, 0);
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001092 if (ret) {
Mark Fasheha9f5f702007-04-26 11:43:43 -07001093 if (ret != -ENOENT)
1094 mlog_errno(ret);
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001095 goto out;
1096 }
1097
Tiger Yang23fc2702008-11-14 11:17:18 +08001098 ret = generic_permission(inode, mask, ocfs2_check_acl);
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001099
Mark Fashehe63aecb62007-10-18 15:30:42 -07001100 ocfs2_inode_unlock(inode, 0);
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001101out:
1102 mlog_exit(ret);
1103 return ret;
1104}
1105
Mark Fashehb2580102007-03-09 16:53:21 -08001106static int __ocfs2_write_remove_suid(struct inode *inode,
1107 struct buffer_head *bh)
Mark Fashehccd979b2005-12-15 14:31:24 -08001108{
1109 int ret;
Mark Fasheh1fabe142006-10-09 18:11:45 -07001110 handle_t *handle;
Mark Fashehccd979b2005-12-15 14:31:24 -08001111 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1112 struct ocfs2_dinode *di;
1113
Mark Fashehb06970532006-03-03 10:24:33 -08001114 mlog_entry("(Inode %llu, mode 0%o)\n",
Mark Fashehb2580102007-03-09 16:53:21 -08001115 (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001116
Mark Fasheh65eff9c2006-10-09 17:26:22 -07001117 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
Jan Karafa38e922008-10-20 19:23:51 +02001118 if (IS_ERR(handle)) {
1119 ret = PTR_ERR(handle);
Mark Fashehccd979b2005-12-15 14:31:24 -08001120 mlog_errno(ret);
1121 goto out;
1122 }
1123
Joel Becker13723d02008-10-17 19:25:01 -07001124 ret = ocfs2_journal_access_di(handle, inode, bh,
1125 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -08001126 if (ret < 0) {
1127 mlog_errno(ret);
Mark Fashehb2580102007-03-09 16:53:21 -08001128 goto out_trans;
Mark Fashehccd979b2005-12-15 14:31:24 -08001129 }
1130
1131 inode->i_mode &= ~S_ISUID;
1132 if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP))
1133 inode->i_mode &= ~S_ISGID;
1134
1135 di = (struct ocfs2_dinode *) bh->b_data;
1136 di->i_mode = cpu_to_le16(inode->i_mode);
1137
1138 ret = ocfs2_journal_dirty(handle, bh);
1139 if (ret < 0)
1140 mlog_errno(ret);
Mark Fashehb2580102007-03-09 16:53:21 -08001141
Mark Fashehccd979b2005-12-15 14:31:24 -08001142out_trans:
Mark Fasheh02dc1af2006-10-09 16:48:10 -07001143 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -08001144out:
1145 mlog_exit(ret);
1146 return ret;
1147}
1148
Mark Fasheh9517bac2007-02-09 20:24:12 -08001149/*
1150 * Will look for holes and unwritten extents in the range starting at
1151 * pos for count bytes (inclusive).
1152 */
1153static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos,
1154 size_t count)
1155{
1156 int ret = 0;
Mark Fasheh49cb8d22007-03-09 16:21:46 -08001157 unsigned int extent_flags;
Mark Fasheh9517bac2007-02-09 20:24:12 -08001158 u32 cpos, clusters, extent_len, phys_cpos;
1159 struct super_block *sb = inode->i_sb;
1160
1161 cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits;
1162 clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
1163
1164 while (clusters) {
Mark Fasheh49cb8d22007-03-09 16:21:46 -08001165 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
1166 &extent_flags);
Mark Fasheh9517bac2007-02-09 20:24:12 -08001167 if (ret < 0) {
1168 mlog_errno(ret);
1169 goto out;
1170 }
1171
Mark Fasheh49cb8d22007-03-09 16:21:46 -08001172 if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) {
Mark Fasheh9517bac2007-02-09 20:24:12 -08001173 ret = 1;
1174 break;
1175 }
1176
1177 if (extent_len > clusters)
1178 extent_len = clusters;
1179
1180 clusters -= extent_len;
1181 cpos += extent_len;
1182 }
1183out:
1184 return ret;
1185}
1186
Mark Fashehb2580102007-03-09 16:53:21 -08001187static int ocfs2_write_remove_suid(struct inode *inode)
1188{
1189 int ret;
1190 struct buffer_head *bh = NULL;
Mark Fashehb2580102007-03-09 16:53:21 -08001191
Joel Beckerb657c952008-11-13 14:49:11 -08001192 ret = ocfs2_read_inode_block(inode, &bh);
Mark Fashehb2580102007-03-09 16:53:21 -08001193 if (ret < 0) {
1194 mlog_errno(ret);
1195 goto out;
1196 }
1197
1198 ret = __ocfs2_write_remove_suid(inode, bh);
1199out:
1200 brelse(bh);
1201 return ret;
1202}
1203
Mark Fasheh2ae99a62007-03-09 16:43:28 -08001204/*
1205 * Allocate enough extents to cover the region starting at byte offset
1206 * start for len bytes. Existing extents are skipped, any extents
1207 * added are marked as "unwritten".
1208 */
1209static int ocfs2_allocate_unwritten_extents(struct inode *inode,
1210 u64 start, u64 len)
1211{
1212 int ret;
1213 u32 cpos, phys_cpos, clusters, alloc_size;
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001214 u64 end = start + len;
1215 struct buffer_head *di_bh = NULL;
1216
1217 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
Joel Beckerb657c952008-11-13 14:49:11 -08001218 ret = ocfs2_read_inode_block(inode, &di_bh);
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001219 if (ret) {
1220 mlog_errno(ret);
1221 goto out;
1222 }
1223
1224 /*
1225 * Nothing to do if the requested reservation range
1226 * fits within the inode.
1227 */
1228 if (ocfs2_size_fits_inline_data(di_bh, end))
1229 goto out;
1230
1231 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
1232 if (ret) {
1233 mlog_errno(ret);
1234 goto out;
1235 }
1236 }
Mark Fasheh2ae99a62007-03-09 16:43:28 -08001237
1238 /*
1239 * We consider both start and len to be inclusive.
1240 */
1241 cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
1242 clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len);
1243 clusters -= cpos;
1244
1245 while (clusters) {
1246 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
1247 &alloc_size, NULL);
1248 if (ret) {
1249 mlog_errno(ret);
1250 goto out;
1251 }
1252
1253 /*
1254 * Hole or existing extent len can be arbitrary, so
1255 * cap it to our own allocation request.
1256 */
1257 if (alloc_size > clusters)
1258 alloc_size = clusters;
1259
1260 if (phys_cpos) {
1261 /*
1262 * We already have an allocation at this
1263 * region so we can safely skip it.
1264 */
1265 goto next;
1266 }
1267
1268 ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
1269 if (ret) {
1270 if (ret != -ENOSPC)
1271 mlog_errno(ret);
1272 goto out;
1273 }
1274
1275next:
1276 cpos += alloc_size;
1277 clusters -= alloc_size;
1278 }
1279
1280 ret = 0;
1281out:
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001282
1283 brelse(di_bh);
Mark Fasheh2ae99a62007-03-09 16:43:28 -08001284 return ret;
1285}
1286
Mark Fasheh063c4562007-07-03 13:34:11 -07001287/*
1288 * Truncate a byte range, avoiding pages within partial clusters. This
1289 * preserves those pages for the zeroing code to write to.
1290 */
1291static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start,
1292 u64 byte_len)
1293{
1294 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1295 loff_t start, end;
1296 struct address_space *mapping = inode->i_mapping;
1297
1298 start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start);
1299 end = byte_start + byte_len;
1300 end = end & ~(osb->s_clustersize - 1);
1301
1302 if (start < end) {
1303 unmap_mapping_range(mapping, start, end - start, 0);
1304 truncate_inode_pages_range(mapping, start, end - 1);
1305 }
1306}
1307
1308static int ocfs2_zero_partial_clusters(struct inode *inode,
1309 u64 start, u64 len)
1310{
1311 int ret = 0;
1312 u64 tmpend, end = start + len;
1313 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1314 unsigned int csize = osb->s_clustersize;
1315 handle_t *handle;
1316
1317 /*
1318 * The "start" and "end" values are NOT necessarily part of
1319 * the range whose allocation is being deleted. Rather, this
1320 * is what the user passed in with the request. We must zero
1321 * partial clusters here. There's no need to worry about
1322 * physical allocation - the zeroing code knows to skip holes.
1323 */
1324 mlog(0, "byte start: %llu, end: %llu\n",
1325 (unsigned long long)start, (unsigned long long)end);
1326
1327 /*
1328 * If both edges are on a cluster boundary then there's no
1329 * zeroing required as the region is part of the allocation to
1330 * be truncated.
1331 */
1332 if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0)
1333 goto out;
1334
1335 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
Jan Karafa38e922008-10-20 19:23:51 +02001336 if (IS_ERR(handle)) {
1337 ret = PTR_ERR(handle);
Mark Fasheh063c4562007-07-03 13:34:11 -07001338 mlog_errno(ret);
1339 goto out;
1340 }
1341
1342 /*
1343 * We want to get the byte offset of the end of the 1st cluster.
1344 */
1345 tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1));
1346 if (tmpend > end)
1347 tmpend = end;
1348
1349 mlog(0, "1st range: start: %llu, tmpend: %llu\n",
1350 (unsigned long long)start, (unsigned long long)tmpend);
1351
1352 ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend);
1353 if (ret)
1354 mlog_errno(ret);
1355
1356 if (tmpend < end) {
1357 /*
1358 * This may make start and end equal, but the zeroing
1359 * code will skip any work in that case so there's no
1360 * need to catch it up here.
1361 */
1362 start = end & ~(osb->s_clustersize - 1);
1363
1364 mlog(0, "2nd range: start: %llu, end: %llu\n",
1365 (unsigned long long)start, (unsigned long long)end);
1366
1367 ret = ocfs2_zero_range_for_truncate(inode, handle, start, end);
1368 if (ret)
1369 mlog_errno(ret);
1370 }
1371
1372 ocfs2_commit_trans(osb, handle);
1373out:
1374 return ret;
1375}
1376
1377static int ocfs2_remove_inode_range(struct inode *inode,
1378 struct buffer_head *di_bh, u64 byte_start,
1379 u64 byte_len)
1380{
1381 int ret = 0;
1382 u32 trunc_start, trunc_len, cpos, phys_cpos, alloc_size;
1383 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1384 struct ocfs2_cached_dealloc_ctxt dealloc;
Mark Fashehb1967d02007-11-20 11:56:39 -08001385 struct address_space *mapping = inode->i_mapping;
Mark Fashehfecc0112008-11-12 15:16:38 -08001386 struct ocfs2_extent_tree et;
Mark Fasheh063c4562007-07-03 13:34:11 -07001387
Mark Fashehfecc0112008-11-12 15:16:38 -08001388 ocfs2_init_dinode_extent_tree(&et, inode, di_bh);
Mark Fasheh063c4562007-07-03 13:34:11 -07001389 ocfs2_init_dealloc_ctxt(&dealloc);
1390
1391 if (byte_len == 0)
1392 return 0;
1393
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001394 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1395 ret = ocfs2_truncate_inline(inode, di_bh, byte_start,
Mark Fashehb1967d02007-11-20 11:56:39 -08001396 byte_start + byte_len, 0);
1397 if (ret) {
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001398 mlog_errno(ret);
Mark Fashehb1967d02007-11-20 11:56:39 -08001399 goto out;
1400 }
1401 /*
1402 * There's no need to get fancy with the page cache
1403 * truncate of an inline-data inode. We're talking
1404 * about less than a page here, which will be cached
1405 * in the dinode buffer anyway.
1406 */
1407 unmap_mapping_range(mapping, 0, 0, 0);
1408 truncate_inode_pages(mapping, 0);
1409 goto out;
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001410 }
1411
Mark Fasheh063c4562007-07-03 13:34:11 -07001412 trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
1413 trunc_len = (byte_start + byte_len) >> osb->s_clustersize_bits;
1414 if (trunc_len >= trunc_start)
1415 trunc_len -= trunc_start;
1416 else
1417 trunc_len = 0;
1418
1419 mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, clen: %u\n",
1420 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1421 (unsigned long long)byte_start,
1422 (unsigned long long)byte_len, trunc_start, trunc_len);
1423
1424 ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len);
1425 if (ret) {
1426 mlog_errno(ret);
1427 goto out;
1428 }
1429
1430 cpos = trunc_start;
1431 while (trunc_len) {
1432 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
1433 &alloc_size, NULL);
1434 if (ret) {
1435 mlog_errno(ret);
1436 goto out;
1437 }
1438
1439 if (alloc_size > trunc_len)
1440 alloc_size = trunc_len;
1441
1442 /* Only do work for non-holes */
1443 if (phys_cpos != 0) {
Mark Fashehfecc0112008-11-12 15:16:38 -08001444 ret = ocfs2_remove_btree_range(inode, &et, cpos,
1445 phys_cpos, alloc_size,
1446 &dealloc);
Mark Fasheh063c4562007-07-03 13:34:11 -07001447 if (ret) {
1448 mlog_errno(ret);
1449 goto out;
1450 }
1451 }
1452
1453 cpos += alloc_size;
1454 trunc_len -= alloc_size;
1455 }
1456
1457 ocfs2_truncate_cluster_pages(inode, byte_start, byte_len);
1458
1459out:
1460 ocfs2_schedule_truncate_log_flush(osb, 1);
1461 ocfs2_run_deallocs(osb, &dealloc);
1462
1463 return ret;
1464}
1465
Mark Fashehb2580102007-03-09 16:53:21 -08001466/*
1467 * Parts of this function taken from xfs_change_file_space()
1468 */
Mark Fasheh385820a2007-07-19 00:14:38 -07001469static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
1470 loff_t f_pos, unsigned int cmd,
1471 struct ocfs2_space_resv *sr,
1472 int change_size)
Mark Fashehb2580102007-03-09 16:53:21 -08001473{
1474 int ret;
1475 s64 llen;
Mark Fasheh385820a2007-07-19 00:14:38 -07001476 loff_t size;
Mark Fashehb2580102007-03-09 16:53:21 -08001477 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1478 struct buffer_head *di_bh = NULL;
1479 handle_t *handle;
Mark Fasheha00cce32007-07-20 11:28:30 -07001480 unsigned long long max_off = inode->i_sb->s_maxbytes;
Mark Fashehb2580102007-03-09 16:53:21 -08001481
Mark Fashehb2580102007-03-09 16:53:21 -08001482 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
1483 return -EROFS;
1484
1485 mutex_lock(&inode->i_mutex);
1486
1487 /*
1488 * This prevents concurrent writes on other nodes
1489 */
1490 ret = ocfs2_rw_lock(inode, 1);
1491 if (ret) {
1492 mlog_errno(ret);
1493 goto out;
1494 }
1495
Mark Fashehe63aecb62007-10-18 15:30:42 -07001496 ret = ocfs2_inode_lock(inode, &di_bh, 1);
Mark Fashehb2580102007-03-09 16:53:21 -08001497 if (ret) {
1498 mlog_errno(ret);
1499 goto out_rw_unlock;
1500 }
1501
1502 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
1503 ret = -EPERM;
Mark Fashehe63aecb62007-10-18 15:30:42 -07001504 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001505 }
1506
1507 switch (sr->l_whence) {
1508 case 0: /*SEEK_SET*/
1509 break;
1510 case 1: /*SEEK_CUR*/
Mark Fasheh385820a2007-07-19 00:14:38 -07001511 sr->l_start += f_pos;
Mark Fashehb2580102007-03-09 16:53:21 -08001512 break;
1513 case 2: /*SEEK_END*/
1514 sr->l_start += i_size_read(inode);
1515 break;
1516 default:
1517 ret = -EINVAL;
Mark Fashehe63aecb62007-10-18 15:30:42 -07001518 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001519 }
1520 sr->l_whence = 0;
1521
1522 llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len;
1523
1524 if (sr->l_start < 0
1525 || sr->l_start > max_off
1526 || (sr->l_start + llen) < 0
1527 || (sr->l_start + llen) > max_off) {
1528 ret = -EINVAL;
Mark Fashehe63aecb62007-10-18 15:30:42 -07001529 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001530 }
Mark Fasheh385820a2007-07-19 00:14:38 -07001531 size = sr->l_start + sr->l_len;
Mark Fashehb2580102007-03-09 16:53:21 -08001532
1533 if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) {
1534 if (sr->l_len <= 0) {
1535 ret = -EINVAL;
Mark Fashehe63aecb62007-10-18 15:30:42 -07001536 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001537 }
1538 }
1539
Mark Fasheh385820a2007-07-19 00:14:38 -07001540 if (file && should_remove_suid(file->f_path.dentry)) {
Mark Fashehb2580102007-03-09 16:53:21 -08001541 ret = __ocfs2_write_remove_suid(inode, di_bh);
1542 if (ret) {
1543 mlog_errno(ret);
Mark Fashehe63aecb62007-10-18 15:30:42 -07001544 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001545 }
1546 }
1547
1548 down_write(&OCFS2_I(inode)->ip_alloc_sem);
1549 switch (cmd) {
1550 case OCFS2_IOC_RESVSP:
1551 case OCFS2_IOC_RESVSP64:
1552 /*
1553 * This takes unsigned offsets, but the signed ones we
1554 * pass have been checked against overflow above.
1555 */
1556 ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start,
1557 sr->l_len);
1558 break;
1559 case OCFS2_IOC_UNRESVSP:
1560 case OCFS2_IOC_UNRESVSP64:
1561 ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start,
1562 sr->l_len);
1563 break;
1564 default:
1565 ret = -EINVAL;
1566 }
1567 up_write(&OCFS2_I(inode)->ip_alloc_sem);
1568 if (ret) {
1569 mlog_errno(ret);
Mark Fashehe63aecb62007-10-18 15:30:42 -07001570 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001571 }
1572
1573 /*
1574 * We update c/mtime for these changes
1575 */
1576 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1577 if (IS_ERR(handle)) {
1578 ret = PTR_ERR(handle);
1579 mlog_errno(ret);
Mark Fashehe63aecb62007-10-18 15:30:42 -07001580 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001581 }
1582
Mark Fasheh385820a2007-07-19 00:14:38 -07001583 if (change_size && i_size_read(inode) < size)
1584 i_size_write(inode, size);
1585
Mark Fashehb2580102007-03-09 16:53:21 -08001586 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
1587 ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
1588 if (ret < 0)
1589 mlog_errno(ret);
1590
1591 ocfs2_commit_trans(osb, handle);
1592
Mark Fashehe63aecb62007-10-18 15:30:42 -07001593out_inode_unlock:
Mark Fashehb2580102007-03-09 16:53:21 -08001594 brelse(di_bh);
Mark Fashehe63aecb62007-10-18 15:30:42 -07001595 ocfs2_inode_unlock(inode, 1);
Mark Fashehb2580102007-03-09 16:53:21 -08001596out_rw_unlock:
1597 ocfs2_rw_unlock(inode, 1);
1598
Mark Fashehb2580102007-03-09 16:53:21 -08001599out:
Julia Lawallc259ae52008-07-21 09:59:15 +02001600 mutex_unlock(&inode->i_mutex);
Mark Fashehb2580102007-03-09 16:53:21 -08001601 return ret;
1602}
1603
Mark Fasheh385820a2007-07-19 00:14:38 -07001604int ocfs2_change_file_space(struct file *file, unsigned int cmd,
1605 struct ocfs2_space_resv *sr)
1606{
1607 struct inode *inode = file->f_path.dentry->d_inode;
Fernando Carrijoc19a28e2009-01-07 18:09:08 -08001608 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Mark Fasheh385820a2007-07-19 00:14:38 -07001609
1610 if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
1611 !ocfs2_writes_unwritten_extents(osb))
1612 return -ENOTTY;
1613 else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&
1614 !ocfs2_sparse_alloc(osb))
1615 return -ENOTTY;
1616
1617 if (!S_ISREG(inode->i_mode))
1618 return -EINVAL;
1619
1620 if (!(file->f_mode & FMODE_WRITE))
1621 return -EBADF;
1622
1623 return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
1624}
1625
1626static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset,
1627 loff_t len)
1628{
1629 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1630 struct ocfs2_space_resv sr;
1631 int change_size = 1;
1632
1633 if (!ocfs2_writes_unwritten_extents(osb))
1634 return -EOPNOTSUPP;
1635
1636 if (S_ISDIR(inode->i_mode))
1637 return -ENODEV;
1638
1639 if (mode & FALLOC_FL_KEEP_SIZE)
1640 change_size = 0;
1641
1642 sr.l_whence = 0;
1643 sr.l_start = (s64)offset;
1644 sr.l_len = (s64)len;
1645
1646 return __ocfs2_change_file_space(NULL, inode, offset,
1647 OCFS2_IOC_RESVSP64, &sr, change_size);
1648}
1649
Tiger Yang8659ac22006-10-17 18:29:52 -07001650static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
1651 loff_t *ppos,
1652 size_t count,
Mark Fasheh9517bac2007-02-09 20:24:12 -08001653 int appending,
1654 int *direct_io)
Mark Fashehccd979b2005-12-15 14:31:24 -08001655{
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001656 int ret = 0, meta_level = 0;
Tiger Yang8659ac22006-10-17 18:29:52 -07001657 struct inode *inode = dentry->d_inode;
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001658 loff_t saved_pos, end;
Mark Fashehccd979b2005-12-15 14:31:24 -08001659
Mark Fashehccd979b2005-12-15 14:31:24 -08001660 /*
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001661 * We start with a read level meta lock and only jump to an ex
1662 * if we need to make modifications here.
Mark Fashehccd979b2005-12-15 14:31:24 -08001663 */
Mark Fashehccd979b2005-12-15 14:31:24 -08001664 for(;;) {
Mark Fashehe63aecb62007-10-18 15:30:42 -07001665 ret = ocfs2_inode_lock(inode, NULL, meta_level);
Mark Fashehccd979b2005-12-15 14:31:24 -08001666 if (ret < 0) {
1667 meta_level = -1;
1668 mlog_errno(ret);
1669 goto out;
1670 }
1671
1672 /* Clear suid / sgid if necessary. We do this here
1673 * instead of later in the write path because
1674 * remove_suid() calls ->setattr without any hint that
1675 * we may have already done our cluster locking. Since
1676 * ocfs2_setattr() *must* take cluster locks to
1677 * proceeed, this will lead us to recursively lock the
1678 * inode. There's also the dinode i_size state which
1679 * can be lost via setattr during extending writes (we
1680 * set inode->i_size at the end of a write. */
Tiger Yang8659ac22006-10-17 18:29:52 -07001681 if (should_remove_suid(dentry)) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001682 if (meta_level == 0) {
Mark Fashehe63aecb62007-10-18 15:30:42 -07001683 ocfs2_inode_unlock(inode, meta_level);
Mark Fashehccd979b2005-12-15 14:31:24 -08001684 meta_level = 1;
1685 continue;
1686 }
1687
1688 ret = ocfs2_write_remove_suid(inode);
1689 if (ret < 0) {
1690 mlog_errno(ret);
Tiger Yang8659ac22006-10-17 18:29:52 -07001691 goto out_unlock;
Mark Fashehccd979b2005-12-15 14:31:24 -08001692 }
1693 }
1694
1695 /* work on a copy of ppos until we're sure that we won't have
1696 * to recalculate it due to relocking. */
Tiger Yang8659ac22006-10-17 18:29:52 -07001697 if (appending) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001698 saved_pos = i_size_read(inode);
1699 mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos);
1700 } else {
Tiger Yang8659ac22006-10-17 18:29:52 -07001701 saved_pos = *ppos;
Mark Fashehccd979b2005-12-15 14:31:24 -08001702 }
Mark Fasheh3a0782d2007-01-17 12:53:31 -08001703
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001704 end = saved_pos + count;
Mark Fasheh9517bac2007-02-09 20:24:12 -08001705
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001706 /*
1707 * Skip the O_DIRECT checks if we don't need
1708 * them.
1709 */
1710 if (!direct_io || !(*direct_io))
1711 break;
Mark Fasheh9517bac2007-02-09 20:24:12 -08001712
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001713 /*
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001714 * There's no sane way to do direct writes to an inode
1715 * with inline data.
1716 */
1717 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1718 *direct_io = 0;
1719 break;
1720 }
1721
1722 /*
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001723 * Allowing concurrent direct writes means
1724 * i_size changes wouldn't be synchronized, so
1725 * one node could wind up truncating another
1726 * nodes writes.
1727 */
1728 if (end > i_size_read(inode)) {
1729 *direct_io = 0;
Mark Fasheh9517bac2007-02-09 20:24:12 -08001730 break;
1731 }
1732
Mark Fasheh3a0782d2007-01-17 12:53:31 -08001733 /*
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001734 * We don't fill holes during direct io, so
1735 * check for them here. If any are found, the
1736 * caller will have to retake some cluster
1737 * locks and initiate the io as buffered.
Mark Fasheh3a0782d2007-01-17 12:53:31 -08001738 */
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001739 ret = ocfs2_check_range_for_holes(inode, saved_pos, count);
1740 if (ret == 1) {
1741 *direct_io = 0;
1742 ret = 0;
1743 } else if (ret < 0)
1744 mlog_errno(ret);
Mark Fashehccd979b2005-12-15 14:31:24 -08001745 break;
1746 }
1747
Tiger Yang8659ac22006-10-17 18:29:52 -07001748 if (appending)
1749 *ppos = saved_pos;
1750
1751out_unlock:
Mark Fashehe63aecb62007-10-18 15:30:42 -07001752 ocfs2_inode_unlock(inode, meta_level);
Tiger Yang8659ac22006-10-17 18:29:52 -07001753
1754out:
1755 return ret;
1756}
1757
1758static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
1759 const struct iovec *iov,
1760 unsigned long nr_segs,
1761 loff_t pos)
1762{
Mark Fasheh9517bac2007-02-09 20:24:12 -08001763 int ret, direct_io, appending, rw_level, have_alloc_sem = 0;
Nick Pigginb6af1bc2007-10-16 01:25:24 -07001764 int can_do_direct;
Mark Fasheh9517bac2007-02-09 20:24:12 -08001765 ssize_t written = 0;
1766 size_t ocount; /* original count */
1767 size_t count; /* after file limit checks */
Mark Fasheh9ea2d322007-10-18 14:14:45 -07001768 loff_t old_size, *ppos = &iocb->ki_pos;
1769 u32 old_clusters;
Mark Fasheh9517bac2007-02-09 20:24:12 -08001770 struct file *file = iocb->ki_filp;
1771 struct inode *inode = file->f_path.dentry->d_inode;
Mark Fasheh9ea2d322007-10-18 14:14:45 -07001772 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Tiger Yang8659ac22006-10-17 18:29:52 -07001773
Mark Fasheh9517bac2007-02-09 20:24:12 -08001774 mlog_entry("(0x%p, %u, '%.*s')\n", file,
Tiger Yang8659ac22006-10-17 18:29:52 -07001775 (unsigned int)nr_segs,
Mark Fasheh9517bac2007-02-09 20:24:12 -08001776 file->f_path.dentry->d_name.len,
1777 file->f_path.dentry->d_name.name);
Tiger Yang8659ac22006-10-17 18:29:52 -07001778
Tiger Yang8659ac22006-10-17 18:29:52 -07001779 if (iocb->ki_left == 0)
1780 return 0;
1781
Mark Fasheh9517bac2007-02-09 20:24:12 -08001782 vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
1783
1784 appending = file->f_flags & O_APPEND ? 1 : 0;
1785 direct_io = file->f_flags & O_DIRECT ? 1 : 0;
1786
Tiger Yang8659ac22006-10-17 18:29:52 -07001787 mutex_lock(&inode->i_mutex);
Mark Fasheh9517bac2007-02-09 20:24:12 -08001788
1789relock:
Tiger Yang8659ac22006-10-17 18:29:52 -07001790 /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */
Mark Fasheh9517bac2007-02-09 20:24:12 -08001791 if (direct_io) {
Tiger Yang8659ac22006-10-17 18:29:52 -07001792 down_read(&inode->i_alloc_sem);
Mark Fasheh9517bac2007-02-09 20:24:12 -08001793 have_alloc_sem = 1;
Tiger Yang8659ac22006-10-17 18:29:52 -07001794 }
1795
1796 /* concurrent O_DIRECT writes are allowed */
Mark Fasheh9517bac2007-02-09 20:24:12 -08001797 rw_level = !direct_io;
Tiger Yang8659ac22006-10-17 18:29:52 -07001798 ret = ocfs2_rw_lock(inode, rw_level);
1799 if (ret < 0) {
Mark Fasheh9517bac2007-02-09 20:24:12 -08001800 mlog_errno(ret);
1801 goto out_sems;
1802 }
1803
1804 can_do_direct = direct_io;
1805 ret = ocfs2_prepare_inode_for_write(file->f_path.dentry, ppos,
1806 iocb->ki_left, appending,
1807 &can_do_direct);
1808 if (ret < 0) {
Tiger Yang8659ac22006-10-17 18:29:52 -07001809 mlog_errno(ret);
1810 goto out;
1811 }
1812
Mark Fasheh9517bac2007-02-09 20:24:12 -08001813 /*
1814 * We can't complete the direct I/O as requested, fall back to
1815 * buffered I/O.
1816 */
1817 if (direct_io && !can_do_direct) {
1818 ocfs2_rw_unlock(inode, rw_level);
1819 up_read(&inode->i_alloc_sem);
1820
1821 have_alloc_sem = 0;
1822 rw_level = -1;
1823
1824 direct_io = 0;
Mark Fasheh9517bac2007-02-09 20:24:12 -08001825 goto relock;
Tiger Yang8659ac22006-10-17 18:29:52 -07001826 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001827
Mark Fasheh9ea2d322007-10-18 14:14:45 -07001828 /*
1829 * To later detect whether a journal commit for sync writes is
1830 * necessary, we sample i_size, and cluster count here.
1831 */
1832 old_size = i_size_read(inode);
1833 old_clusters = OCFS2_I(inode)->ip_clusters;
1834
Mark Fashehccd979b2005-12-15 14:31:24 -08001835 /* communicate with ocfs2_dio_end_io */
Mark Fasheh7cdfc3a2007-04-16 17:28:51 -07001836 ocfs2_iocb_set_rw_locked(iocb, rw_level);
Mark Fashehccd979b2005-12-15 14:31:24 -08001837
Mark Fasheh9517bac2007-02-09 20:24:12 -08001838 if (direct_io) {
Nick Pigginb6af1bc2007-10-16 01:25:24 -07001839 ret = generic_segment_checks(iov, &nr_segs, &ocount,
1840 VERIFY_READ);
1841 if (ret)
1842 goto out_dio;
1843
1844 ret = generic_write_checks(file, ppos, &count,
1845 S_ISBLK(inode->i_mode));
1846 if (ret)
1847 goto out_dio;
1848
Mark Fasheh9517bac2007-02-09 20:24:12 -08001849 written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
1850 ppos, count, ocount);
1851 if (written < 0) {
Dmitri Monakhovc4354002008-10-27 13:01:49 -07001852 /*
1853 * direct write may have instantiated a few
1854 * blocks outside i_size. Trim these off again.
1855 * Don't need i_size_read because we hold i_mutex.
1856 */
1857 if (*ppos + count > inode->i_size)
1858 vmtruncate(inode, inode->i_size);
Mark Fasheh9517bac2007-02-09 20:24:12 -08001859 ret = written;
1860 goto out_dio;
1861 }
1862 } else {
Nick Pigginb6af1bc2007-10-16 01:25:24 -07001863 written = generic_file_aio_write_nolock(iocb, iov, nr_segs,
1864 *ppos);
Mark Fasheh9517bac2007-02-09 20:24:12 -08001865 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001866
Mark Fasheh9517bac2007-02-09 20:24:12 -08001867out_dio:
Mark Fashehccd979b2005-12-15 14:31:24 -08001868 /* buffered aio wouldn't have proper lock coverage today */
Mark Fasheh9517bac2007-02-09 20:24:12 -08001869 BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT));
Mark Fashehccd979b2005-12-15 14:31:24 -08001870
Mark Fasheh9ea2d322007-10-18 14:14:45 -07001871 if ((file->f_flags & O_SYNC && !direct_io) || IS_SYNC(inode)) {
1872 /*
1873 * The generic write paths have handled getting data
1874 * to disk, but since we don't make use of the dirty
1875 * inode list, a manual journal commit is necessary
1876 * here.
1877 */
1878 if (old_size != i_size_read(inode) ||
1879 old_clusters != OCFS2_I(inode)->ip_clusters) {
Joel Becker2b4e30f2008-09-03 20:03:41 -07001880 ret = jbd2_journal_force_commit(osb->journal->j_journal);
Mark Fasheh9ea2d322007-10-18 14:14:45 -07001881 if (ret < 0)
1882 written = ret;
1883 }
1884 }
1885
Mark Fashehccd979b2005-12-15 14:31:24 -08001886 /*
1887 * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
1888 * function pointer which is called when o_direct io completes so that
1889 * it can unlock our rw lock. (it's the clustered equivalent of
1890 * i_alloc_sem; protects truncate from racing with pending ios).
1891 * Unfortunately there are error cases which call end_io and others
1892 * that don't. so we don't have to unlock the rw_lock if either an
1893 * async dio is going to do it in the future or an end_io after an
1894 * error has already done it.
1895 */
1896 if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
1897 rw_level = -1;
1898 have_alloc_sem = 0;
1899 }
1900
1901out:
Mark Fasheh9517bac2007-02-09 20:24:12 -08001902 if (rw_level != -1)
1903 ocfs2_rw_unlock(inode, rw_level);
1904
1905out_sems:
Mark Fashehccd979b2005-12-15 14:31:24 -08001906 if (have_alloc_sem)
1907 up_read(&inode->i_alloc_sem);
Mark Fasheh9517bac2007-02-09 20:24:12 -08001908
Jes Sorensen1b1dcc12006-01-09 15:59:24 -08001909 mutex_unlock(&inode->i_mutex);
Mark Fashehccd979b2005-12-15 14:31:24 -08001910
1911 mlog_exit(ret);
Mark Fasheh9517bac2007-02-09 20:24:12 -08001912 return written ? written : ret;
Mark Fashehccd979b2005-12-15 14:31:24 -08001913}
1914
Tiger Yang8659ac22006-10-17 18:29:52 -07001915static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe,
1916 struct file *out,
1917 loff_t *ppos,
1918 size_t len,
1919 unsigned int flags)
1920{
1921 int ret;
Josef Sipekd28c9172006-12-08 02:37:25 -08001922 struct inode *inode = out->f_path.dentry->d_inode;
Tiger Yang8659ac22006-10-17 18:29:52 -07001923
1924 mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out, pipe,
1925 (unsigned int)len,
Josef Sipekd28c9172006-12-08 02:37:25 -08001926 out->f_path.dentry->d_name.len,
1927 out->f_path.dentry->d_name.name);
Tiger Yang8659ac22006-10-17 18:29:52 -07001928
1929 inode_double_lock(inode, pipe->inode);
1930
1931 ret = ocfs2_rw_lock(inode, 1);
1932 if (ret < 0) {
1933 mlog_errno(ret);
1934 goto out;
1935 }
1936
Mark Fasheh9517bac2007-02-09 20:24:12 -08001937 ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, ppos, len, 0,
1938 NULL);
Tiger Yang8659ac22006-10-17 18:29:52 -07001939 if (ret < 0) {
1940 mlog_errno(ret);
1941 goto out_unlock;
1942 }
1943
Nick Pigginb6af1bc2007-10-16 01:25:24 -07001944 ret = generic_file_splice_write_nolock(pipe, out, ppos, len, flags);
Tiger Yang8659ac22006-10-17 18:29:52 -07001945
1946out_unlock:
1947 ocfs2_rw_unlock(inode, 1);
1948out:
1949 inode_double_unlock(inode, pipe->inode);
1950
1951 mlog_exit(ret);
1952 return ret;
1953}
1954
1955static ssize_t ocfs2_file_splice_read(struct file *in,
1956 loff_t *ppos,
1957 struct pipe_inode_info *pipe,
1958 size_t len,
1959 unsigned int flags)
1960{
1961 int ret = 0;
Josef Sipekd28c9172006-12-08 02:37:25 -08001962 struct inode *inode = in->f_path.dentry->d_inode;
Tiger Yang8659ac22006-10-17 18:29:52 -07001963
1964 mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", in, pipe,
1965 (unsigned int)len,
Josef Sipekd28c9172006-12-08 02:37:25 -08001966 in->f_path.dentry->d_name.len,
1967 in->f_path.dentry->d_name.name);
Tiger Yang8659ac22006-10-17 18:29:52 -07001968
1969 /*
1970 * See the comment in ocfs2_file_aio_read()
1971 */
Mark Fashehe63aecb62007-10-18 15:30:42 -07001972 ret = ocfs2_inode_lock(inode, NULL, 0);
Tiger Yang8659ac22006-10-17 18:29:52 -07001973 if (ret < 0) {
1974 mlog_errno(ret);
1975 goto bail;
1976 }
Mark Fashehe63aecb62007-10-18 15:30:42 -07001977 ocfs2_inode_unlock(inode, 0);
Tiger Yang8659ac22006-10-17 18:29:52 -07001978
1979 ret = generic_file_splice_read(in, ppos, pipe, len, flags);
1980
1981bail:
1982 mlog_exit(ret);
1983 return ret;
1984}
1985
Mark Fashehccd979b2005-12-15 14:31:24 -08001986static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
Badari Pulavarty027445c2006-09-30 23:28:46 -07001987 const struct iovec *iov,
1988 unsigned long nr_segs,
Mark Fashehccd979b2005-12-15 14:31:24 -08001989 loff_t pos)
1990{
Tiger Yang25899de2006-11-15 15:49:02 +08001991 int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -08001992 struct file *filp = iocb->ki_filp;
Josef Sipekd28c9172006-12-08 02:37:25 -08001993 struct inode *inode = filp->f_path.dentry->d_inode;
Mark Fashehccd979b2005-12-15 14:31:24 -08001994
Badari Pulavarty027445c2006-09-30 23:28:46 -07001995 mlog_entry("(0x%p, %u, '%.*s')\n", filp,
1996 (unsigned int)nr_segs,
Josef Sipekd28c9172006-12-08 02:37:25 -08001997 filp->f_path.dentry->d_name.len,
1998 filp->f_path.dentry->d_name.name);
Mark Fashehccd979b2005-12-15 14:31:24 -08001999
2000 if (!inode) {
2001 ret = -EINVAL;
2002 mlog_errno(ret);
2003 goto bail;
2004 }
2005
Mark Fashehccd979b2005-12-15 14:31:24 -08002006 /*
2007 * buffered reads protect themselves in ->readpage(). O_DIRECT reads
2008 * need locks to protect pending reads from racing with truncate.
2009 */
2010 if (filp->f_flags & O_DIRECT) {
2011 down_read(&inode->i_alloc_sem);
2012 have_alloc_sem = 1;
2013
2014 ret = ocfs2_rw_lock(inode, 0);
2015 if (ret < 0) {
2016 mlog_errno(ret);
2017 goto bail;
2018 }
2019 rw_level = 0;
2020 /* communicate with ocfs2_dio_end_io */
Mark Fasheh7cdfc3a2007-04-16 17:28:51 -07002021 ocfs2_iocb_set_rw_locked(iocb, rw_level);
Mark Fashehccd979b2005-12-15 14:31:24 -08002022 }
2023
Mark Fashehc4374f82006-05-05 19:04:35 -07002024 /*
2025 * We're fine letting folks race truncates and extending
2026 * writes with read across the cluster, just like they can
2027 * locally. Hence no rw_lock during read.
2028 *
2029 * Take and drop the meta data lock to update inode fields
2030 * like i_size. This allows the checks down below
2031 * generic_file_aio_read() a chance of actually working.
2032 */
Mark Fashehe63aecb62007-10-18 15:30:42 -07002033 ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level);
Mark Fashehc4374f82006-05-05 19:04:35 -07002034 if (ret < 0) {
2035 mlog_errno(ret);
2036 goto bail;
2037 }
Mark Fashehe63aecb62007-10-18 15:30:42 -07002038 ocfs2_inode_unlock(inode, lock_level);
Mark Fashehc4374f82006-05-05 19:04:35 -07002039
Badari Pulavarty027445c2006-09-30 23:28:46 -07002040 ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos);
Mark Fashehccd979b2005-12-15 14:31:24 -08002041 if (ret == -EINVAL)
Sunil Mushran56753bd2008-06-09 11:24:41 -07002042 mlog(0, "generic_file_aio_read returned -EINVAL\n");
Mark Fashehccd979b2005-12-15 14:31:24 -08002043
2044 /* buffered aio wouldn't have proper lock coverage today */
2045 BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT));
2046
2047 /* see ocfs2_file_aio_write */
2048 if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
2049 rw_level = -1;
2050 have_alloc_sem = 0;
2051 }
2052
2053bail:
2054 if (have_alloc_sem)
2055 up_read(&inode->i_alloc_sem);
2056 if (rw_level != -1)
2057 ocfs2_rw_unlock(inode, rw_level);
2058 mlog_exit(ret);
2059
2060 return ret;
2061}
2062
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08002063const struct inode_operations ocfs2_file_iops = {
Mark Fashehccd979b2005-12-15 14:31:24 -08002064 .setattr = ocfs2_setattr,
2065 .getattr = ocfs2_getattr,
Tiger Yangd38eb8d2006-11-27 09:59:21 +08002066 .permission = ocfs2_permission,
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002067 .setxattr = generic_setxattr,
2068 .getxattr = generic_getxattr,
2069 .listxattr = ocfs2_listxattr,
2070 .removexattr = generic_removexattr,
Mark Fasheh385820a2007-07-19 00:14:38 -07002071 .fallocate = ocfs2_fallocate,
Mark Fasheh00dc4172008-10-03 17:32:11 -04002072 .fiemap = ocfs2_fiemap,
Mark Fashehccd979b2005-12-15 14:31:24 -08002073};
2074
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08002075const struct inode_operations ocfs2_special_file_iops = {
Mark Fashehccd979b2005-12-15 14:31:24 -08002076 .setattr = ocfs2_setattr,
2077 .getattr = ocfs2_getattr,
Tiger Yangd38eb8d2006-11-27 09:59:21 +08002078 .permission = ocfs2_permission,
Mark Fashehccd979b2005-12-15 14:31:24 -08002079};
2080
Mark Fasheh53da4932008-07-21 14:29:16 -07002081/*
2082 * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with
2083 * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks!
2084 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -08002085const struct file_operations ocfs2_fops = {
Jan Kara32c3c0e2007-12-19 15:24:52 +01002086 .llseek = generic_file_llseek,
Mark Fashehccd979b2005-12-15 14:31:24 -08002087 .read = do_sync_read,
2088 .write = do_sync_write,
Mark Fashehccd979b2005-12-15 14:31:24 -08002089 .mmap = ocfs2_mmap,
2090 .fsync = ocfs2_sync_file,
2091 .release = ocfs2_file_release,
2092 .open = ocfs2_file_open,
2093 .aio_read = ocfs2_file_aio_read,
2094 .aio_write = ocfs2_file_aio_write,
Andi Kleenc9ec1482008-01-27 03:17:17 +01002095 .unlocked_ioctl = ocfs2_ioctl,
Mark Fasheh586d2322007-03-09 15:56:28 -08002096#ifdef CONFIG_COMPAT
2097 .compat_ioctl = ocfs2_compat_ioctl,
2098#endif
Mark Fasheh53da4932008-07-21 14:29:16 -07002099 .lock = ocfs2_lock,
2100 .flock = ocfs2_flock,
2101 .splice_read = ocfs2_file_splice_read,
2102 .splice_write = ocfs2_file_splice_write,
2103};
2104
2105const struct file_operations ocfs2_dops = {
2106 .llseek = generic_file_llseek,
2107 .read = generic_read_dir,
2108 .readdir = ocfs2_readdir,
2109 .fsync = ocfs2_sync_file,
2110 .release = ocfs2_dir_release,
2111 .open = ocfs2_dir_open,
2112 .unlocked_ioctl = ocfs2_ioctl,
2113#ifdef CONFIG_COMPAT
2114 .compat_ioctl = ocfs2_compat_ioctl,
2115#endif
2116 .lock = ocfs2_lock,
2117 .flock = ocfs2_flock,
2118};
2119
2120/*
2121 * POSIX-lockless variants of our file_operations.
2122 *
2123 * These will be used if the underlying cluster stack does not support
2124 * posix file locking, if the user passes the "localflocks" mount
2125 * option, or if we have a local-only fs.
2126 *
2127 * ocfs2_flock is in here because all stacks handle UNIX file locks,
2128 * so we still want it in the case of no stack support for
2129 * plocks. Internally, it will do the right thing when asked to ignore
2130 * the cluster.
2131 */
2132const struct file_operations ocfs2_fops_no_plocks = {
2133 .llseek = generic_file_llseek,
2134 .read = do_sync_read,
2135 .write = do_sync_write,
2136 .mmap = ocfs2_mmap,
2137 .fsync = ocfs2_sync_file,
2138 .release = ocfs2_file_release,
2139 .open = ocfs2_file_open,
2140 .aio_read = ocfs2_file_aio_read,
2141 .aio_write = ocfs2_file_aio_write,
2142 .unlocked_ioctl = ocfs2_ioctl,
2143#ifdef CONFIG_COMPAT
2144 .compat_ioctl = ocfs2_compat_ioctl,
2145#endif
Mark Fasheh53fc6222007-12-20 16:49:04 -08002146 .flock = ocfs2_flock,
Tiger Yang8659ac22006-10-17 18:29:52 -07002147 .splice_read = ocfs2_file_splice_read,
2148 .splice_write = ocfs2_file_splice_write,
Mark Fashehccd979b2005-12-15 14:31:24 -08002149};
2150
Mark Fasheh53da4932008-07-21 14:29:16 -07002151const struct file_operations ocfs2_dops_no_plocks = {
Jan Kara32c3c0e2007-12-19 15:24:52 +01002152 .llseek = generic_file_llseek,
Mark Fashehccd979b2005-12-15 14:31:24 -08002153 .read = generic_read_dir,
2154 .readdir = ocfs2_readdir,
2155 .fsync = ocfs2_sync_file,
Mark Fasheh53fc6222007-12-20 16:49:04 -08002156 .release = ocfs2_dir_release,
2157 .open = ocfs2_dir_open,
Andi Kleenc9ec1482008-01-27 03:17:17 +01002158 .unlocked_ioctl = ocfs2_ioctl,
Mark Fasheh586d2322007-03-09 15:56:28 -08002159#ifdef CONFIG_COMPAT
2160 .compat_ioctl = ocfs2_compat_ioctl,
2161#endif
Mark Fasheh53fc6222007-12-20 16:49:04 -08002162 .flock = ocfs2_flock,
Mark Fashehccd979b2005-12-15 14:31:24 -08002163};