blob: b1e35a392ca5279d7aa7d645aa75fd8c101c6d05 [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>
Jan Kara04eda1a2010-08-05 20:32:45 +020039#include <linux/blkdev.h>
Mark Fashehccd979b2005-12-15 14:31:24 -080040
Mark Fashehccd979b2005-12-15 14:31:24 -080041#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"
Tao Ma293b2f72009-08-25 08:02:48 +080062#include "refcounttree.h"
Tao Ma468eedd2011-02-22 22:14:41 +080063#include "ocfs2_trace.h"
Mark Fashehccd979b2005-12-15 14:31:24 -080064
65#include "buffer_head_io.h"
66
Mark Fasheh53fc6222007-12-20 16:49:04 -080067static int ocfs2_init_file_private(struct inode *inode, struct file *file)
68{
69 struct ocfs2_file_private *fp;
70
71 fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL);
72 if (!fp)
73 return -ENOMEM;
74
75 fp->fp_file = file;
76 mutex_init(&fp->fp_mutex);
77 ocfs2_file_lock_res_init(&fp->fp_flock, fp);
78 file->private_data = fp;
79
80 return 0;
81}
82
83static void ocfs2_free_file_private(struct inode *inode, struct file *file)
84{
85 struct ocfs2_file_private *fp = file->private_data;
86 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
87
88 if (fp) {
89 ocfs2_simple_drop_lockres(osb, &fp->fp_flock);
90 ocfs2_lock_res_free(&fp->fp_flock);
91 kfree(fp);
92 file->private_data = NULL;
93 }
94}
95
Mark Fashehccd979b2005-12-15 14:31:24 -080096static int ocfs2_file_open(struct inode *inode, struct file *file)
97{
98 int status;
99 int mode = file->f_flags;
100 struct ocfs2_inode_info *oi = OCFS2_I(inode);
101
Tao Ma468eedd2011-02-22 22:14:41 +0800102 trace_ocfs2_file_open(inode, file, file->f_path.dentry,
103 (unsigned long long)OCFS2_I(inode)->ip_blkno,
104 file->f_path.dentry->d_name.len,
105 file->f_path.dentry->d_name.name, mode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800106
Christoph Hellwig907f4552010-03-03 09:05:06 -0500107 if (file->f_mode & FMODE_WRITE)
Christoph Hellwig871a2932010-03-03 09:05:07 -0500108 dquot_initialize(inode);
Christoph Hellwig907f4552010-03-03 09:05:06 -0500109
Mark Fashehccd979b2005-12-15 14:31:24 -0800110 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 Fasheh53fc6222007-12-20 16:49:04 -0800127
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 Fashehccd979b2005-12-15 14:31:24 -0800139leave:
Mark Fashehccd979b2005-12-15 14:31:24 -0800140 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
Mark Fashehccd979b2005-12-15 14:31:24 -0800147 spin_lock(&oi->ip_lock);
148 if (!--oi->ip_open_count)
149 oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT;
Tao Ma468eedd2011-02-22 22:14:41 +0800150
151 trace_ocfs2_file_release(inode, file, file->f_path.dentry,
152 oi->ip_blkno,
153 file->f_path.dentry->d_name.len,
154 file->f_path.dentry->d_name.name,
155 oi->ip_open_count);
Mark Fashehccd979b2005-12-15 14:31:24 -0800156 spin_unlock(&oi->ip_lock);
157
Mark Fasheh53fc6222007-12-20 16:49:04 -0800158 ocfs2_free_file_private(inode, file);
159
Mark Fashehccd979b2005-12-15 14:31:24 -0800160 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
Christoph Hellwig7ea80852010-05-26 17:53:25 +0200174static int ocfs2_sync_file(struct file *file, int datasync)
Mark Fashehccd979b2005-12-15 14:31:24 -0800175{
176 int err = 0;
177 journal_t *journal;
Christoph Hellwig7ea80852010-05-26 17:53:25 +0200178 struct inode *inode = file->f_mapping->host;
Mark Fashehccd979b2005-12-15 14:31:24 -0800179 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
180
Tao Ma468eedd2011-02-22 22:14:41 +0800181 trace_ocfs2_sync_file(inode, file, file->f_path.dentry,
182 OCFS2_I(inode)->ip_blkno,
183 file->f_path.dentry->d_name.len,
184 file->f_path.dentry->d_name.name,
185 (unsigned long long)datasync);
Mark Fashehccd979b2005-12-15 14:31:24 -0800186
Jan Kara04eda1a2010-08-05 20:32:45 +0200187 if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) {
188 /*
189 * We still have to flush drive's caches to get data to the
190 * platter
191 */
192 if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER)
Linus Torvaldsf8cae0f2010-10-22 19:30:38 -0700193 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
Hisashi Hifumie04cc152009-06-09 16:47:45 +0900194 goto bail;
Jan Kara04eda1a2010-08-05 20:32:45 +0200195 }
Hisashi Hifumie04cc152009-06-09 16:47:45 +0900196
Mark Fashehccd979b2005-12-15 14:31:24 -0800197 journal = osb->journal->j_journal;
Joel Becker2b4e30f2008-09-03 20:03:41 -0700198 err = jbd2_journal_force_commit(journal);
Mark Fashehccd979b2005-12-15 14:31:24 -0800199
200bail:
Tao Mac1e8d352011-03-07 16:43:21 +0800201 if (err)
202 mlog_errno(err);
Mark Fashehccd979b2005-12-15 14:31:24 -0800203
204 return (err < 0) ? -EIO : 0;
205}
206
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800207int ocfs2_should_update_atime(struct inode *inode,
208 struct vfsmount *vfsmnt)
209{
210 struct timespec now;
211 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
212
213 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
214 return 0;
215
216 if ((inode->i_flags & S_NOATIME) ||
217 ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
218 return 0;
219
Mark Fasheh6c2aad02006-12-19 15:25:52 -0800220 /*
221 * We can be called with no vfsmnt structure - NFSD will
222 * sometimes do this.
223 *
224 * Note that our action here is different than touch_atime() -
225 * if we can't tell whether this is a noatime mount, then we
226 * don't know whether to trust the value of s_atime_quantum.
227 */
228 if (vfsmnt == NULL)
229 return 0;
230
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800231 if ((vfsmnt->mnt_flags & MNT_NOATIME) ||
232 ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
233 return 0;
234
Mark Fasheh7e913c52006-12-13 00:34:35 -0800235 if (vfsmnt->mnt_flags & MNT_RELATIME) {
236 if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) ||
237 (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0))
238 return 1;
239
240 return 0;
241 }
242
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800243 now = CURRENT_TIME;
244 if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum))
245 return 0;
246 else
247 return 1;
248}
249
250int ocfs2_update_inode_atime(struct inode *inode,
251 struct buffer_head *bh)
252{
253 int ret;
254 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
255 handle_t *handle;
Mark Fashehc11e9fa2007-07-20 11:24:53 -0700256 struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data;
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800257
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800258 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
Jan Karafa38e922008-10-20 19:23:51 +0200259 if (IS_ERR(handle)) {
260 ret = PTR_ERR(handle);
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800261 mlog_errno(ret);
262 goto out;
263 }
264
Joel Becker0cf2f762009-02-12 16:41:25 -0800265 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
Joel Becker13723d02008-10-17 19:25:01 -0700266 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehc11e9fa2007-07-20 11:24:53 -0700267 if (ret) {
268 mlog_errno(ret);
269 goto out_commit;
270 }
271
272 /*
273 * Don't use ocfs2_mark_inode_dirty() here as we don't always
274 * have i_mutex to guard against concurrent changes to other
275 * inode fields.
276 */
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800277 inode->i_atime = CURRENT_TIME;
Mark Fashehc11e9fa2007-07-20 11:24:53 -0700278 di->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
279 di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
Joel Beckerec20cec2010-03-19 14:13:52 -0700280 ocfs2_journal_dirty(handle, bh);
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800281
Mark Fashehc11e9fa2007-07-20 11:24:53 -0700282out_commit:
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800283 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
284out:
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800285 return ret;
286}
287
Adrian Bunk6cb129f2007-04-26 00:29:35 -0700288static int ocfs2_set_inode_size(handle_t *handle,
289 struct inode *inode,
290 struct buffer_head *fe_bh,
291 u64 new_i_size)
Mark Fashehccd979b2005-12-15 14:31:24 -0800292{
293 int status;
294
Mark Fashehccd979b2005-12-15 14:31:24 -0800295 i_size_write(inode, new_i_size);
Mark Fasheh8110b072007-03-22 16:53:23 -0700296 inode->i_blocks = ocfs2_inode_sector_count(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800297 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
298
299 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
300 if (status < 0) {
301 mlog_errno(status);
302 goto bail;
303 }
304
305bail:
Mark Fashehccd979b2005-12-15 14:31:24 -0800306 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
Tao Ma37f8a2b2009-08-26 09:47:28 +0800334static int ocfs2_cow_file_pos(struct inode *inode,
335 struct buffer_head *fe_bh,
336 u64 offset)
337{
338 int status;
339 u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
340 unsigned int num_clusters = 0;
341 unsigned int ext_flags = 0;
342
343 /*
344 * If the new offset is aligned to the range of the cluster, there is
345 * no space for ocfs2_zero_range_for_truncate to fill, so no need to
346 * CoW either.
347 */
348 if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0)
349 return 0;
350
351 status = ocfs2_get_clusters(inode, cpos, &phys,
352 &num_clusters, &ext_flags);
353 if (status) {
354 mlog_errno(status);
355 goto out;
356 }
357
358 if (!(ext_flags & OCFS2_EXT_REFCOUNTED))
359 goto out;
360
Tao Ma15502712010-08-12 10:36:38 +0800361 return ocfs2_refcount_cow(inode, NULL, fe_bh, cpos, 1, cpos+1);
Tao Ma37f8a2b2009-08-26 09:47:28 +0800362
363out:
364 return status;
365}
366
Mark Fashehccd979b2005-12-15 14:31:24 -0800367static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb,
368 struct inode *inode,
369 struct buffer_head *fe_bh,
370 u64 new_i_size)
371{
372 int status;
Mark Fasheh1fabe142006-10-09 18:11:45 -0700373 handle_t *handle;
Mark Fasheh60b11392007-02-16 11:46:50 -0800374 struct ocfs2_dinode *di;
Mark Fasheh35edec12007-07-06 14:41:18 -0700375 u64 cluster_bytes;
Mark Fashehccd979b2005-12-15 14:31:24 -0800376
Tao Ma37f8a2b2009-08-26 09:47:28 +0800377 /*
378 * We need to CoW the cluster contains the offset if it is reflinked
379 * since we will call ocfs2_zero_range_for_truncate later which will
380 * write "0" from offset to the end of the cluster.
381 */
382 status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size);
383 if (status) {
384 mlog_errno(status);
385 return status;
386 }
387
Mark Fashehccd979b2005-12-15 14:31:24 -0800388 /* TODO: This needs to actually orphan the inode in this
389 * transaction. */
390
Mark Fasheh65eff9c2006-10-09 17:26:22 -0700391 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
Mark Fashehccd979b2005-12-15 14:31:24 -0800392 if (IS_ERR(handle)) {
393 status = PTR_ERR(handle);
394 mlog_errno(status);
395 goto out;
396 }
397
Joel Becker0cf2f762009-02-12 16:41:25 -0800398 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
Joel Becker13723d02008-10-17 19:25:01 -0700399 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fasheh60b11392007-02-16 11:46:50 -0800400 if (status < 0) {
401 mlog_errno(status);
402 goto out_commit;
403 }
404
405 /*
406 * Do this before setting i_size.
407 */
Mark Fasheh35edec12007-07-06 14:41:18 -0700408 cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
409 status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size,
410 cluster_bytes);
Mark Fasheh60b11392007-02-16 11:46:50 -0800411 if (status) {
412 mlog_errno(status);
413 goto out_commit;
414 }
415
416 i_size_write(inode, new_i_size);
Mark Fasheh60b11392007-02-16 11:46:50 -0800417 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
418
419 di = (struct ocfs2_dinode *) fe_bh->b_data;
420 di->i_size = cpu_to_le64(new_i_size);
421 di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec);
422 di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
423
Joel Beckerec20cec2010-03-19 14:13:52 -0700424 ocfs2_journal_dirty(handle, fe_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800425
Mark Fasheh60b11392007-02-16 11:46:50 -0800426out_commit:
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700427 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800428out:
Mark Fashehccd979b2005-12-15 14:31:24 -0800429 return status;
430}
431
432static int ocfs2_truncate_file(struct inode *inode,
433 struct buffer_head *di_bh,
434 u64 new_i_size)
435{
436 int status = 0;
437 struct ocfs2_dinode *fe = NULL;
438 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Mark Fashehccd979b2005-12-15 14:31:24 -0800439
Joel Beckerb657c952008-11-13 14:49:11 -0800440 /* We trust di_bh because it comes from ocfs2_inode_lock(), which
441 * already validated it */
Mark Fashehccd979b2005-12-15 14:31:24 -0800442 fe = (struct ocfs2_dinode *) di_bh->b_data;
Mark Fashehccd979b2005-12-15 14:31:24 -0800443
Tao Ma468eedd2011-02-22 22:14:41 +0800444 trace_ocfs2_truncate_file((unsigned long long)OCFS2_I(inode)->ip_blkno,
445 (unsigned long long)le64_to_cpu(fe->i_size),
446 (unsigned long long)new_i_size);
447
Mark Fashehccd979b2005-12-15 14:31:24 -0800448 mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode),
Mark Fashehb0697052006-03-03 10:24:33 -0800449 "Inode %llu, inode i_size = %lld != di "
450 "i_size = %llu, i_flags = 0x%x\n",
451 (unsigned long long)OCFS2_I(inode)->ip_blkno,
Mark Fashehccd979b2005-12-15 14:31:24 -0800452 i_size_read(inode),
Mark Fashehb0697052006-03-03 10:24:33 -0800453 (unsigned long long)le64_to_cpu(fe->i_size),
454 le32_to_cpu(fe->i_flags));
Mark Fashehccd979b2005-12-15 14:31:24 -0800455
456 if (new_i_size > le64_to_cpu(fe->i_size)) {
Tao Ma468eedd2011-02-22 22:14:41 +0800457 trace_ocfs2_truncate_file_error(
458 (unsigned long long)le64_to_cpu(fe->i_size),
459 (unsigned long long)new_i_size);
Mark Fashehccd979b2005-12-15 14:31:24 -0800460 status = -EINVAL;
461 mlog_errno(status);
462 goto bail;
463 }
464
Mark Fashehccd979b2005-12-15 14:31:24 -0800465 /* lets handle the simple truncate cases before doing any more
466 * cluster locking. */
467 if (new_i_size == le64_to_cpu(fe->i_size))
468 goto bail;
469
Mark Fasheh2e89b2e2007-05-09 13:40:18 -0700470 down_write(&OCFS2_I(inode)->ip_alloc_sem);
471
Mark Fasheh4fe370a2009-12-07 13:15:40 -0800472 ocfs2_resv_discard(&osb->osb_la_resmap,
473 &OCFS2_I(inode)->ip_la_data_resv);
474
Mark Fashehc934a922007-10-18 15:23:46 -0700475 /*
476 * The inode lock forced other nodes to sync and drop their
477 * pages, which (correctly) happens even if we have a truncate
478 * without allocation change - ocfs2 cluster sizes can be much
479 * greater than page size, so we have to truncate them
480 * anyway.
481 */
Mark Fasheh2e89b2e2007-05-09 13:40:18 -0700482 unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
483 truncate_inode_pages(inode->i_mapping, new_i_size);
484
Mark Fasheh1afc32b2007-09-07 14:46:51 -0700485 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
486 status = ocfs2_truncate_inline(inode, di_bh, new_i_size,
Mark Fashehb1967d02007-11-20 11:56:39 -0800487 i_size_read(inode), 1);
Mark Fasheh1afc32b2007-09-07 14:46:51 -0700488 if (status)
489 mlog_errno(status);
490
Mark Fashehc934a922007-10-18 15:23:46 -0700491 goto bail_unlock_sem;
Mark Fasheh1afc32b2007-09-07 14:46:51 -0700492 }
493
Mark Fashehccd979b2005-12-15 14:31:24 -0800494 /* alright, we're going to need to do a full blown alloc size
495 * change. Orphan the inode so that recovery can complete the
496 * truncate if necessary. This does the task of marking
497 * i_size. */
498 status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size);
499 if (status < 0) {
500 mlog_errno(status);
Mark Fashehc934a922007-10-18 15:23:46 -0700501 goto bail_unlock_sem;
Mark Fashehccd979b2005-12-15 14:31:24 -0800502 }
503
Tristan Ye78f94672010-05-11 17:54:42 +0800504 status = ocfs2_commit_truncate(osb, inode, di_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800505 if (status < 0) {
506 mlog_errno(status);
Mark Fashehc934a922007-10-18 15:23:46 -0700507 goto bail_unlock_sem;
Mark Fashehccd979b2005-12-15 14:31:24 -0800508 }
509
510 /* TODO: orphan dir cleanup here. */
Mark Fashehc934a922007-10-18 15:23:46 -0700511bail_unlock_sem:
Mark Fasheh2e89b2e2007-05-09 13:40:18 -0700512 up_write(&OCFS2_I(inode)->ip_alloc_sem);
513
Mark Fashehccd979b2005-12-15 14:31:24 -0800514bail:
Tao Ma8b2c0db2009-08-18 11:43:49 +0800515 if (!status && OCFS2_I(inode)->ip_clusters == 0)
516 status = ocfs2_try_remove_refcount_tree(inode, di_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800517
Mark Fashehccd979b2005-12-15 14:31:24 -0800518 return status;
519}
520
521/*
Tao Ma0eb8d472008-08-18 17:38:45 +0800522 * extend file allocation only here.
Mark Fashehccd979b2005-12-15 14:31:24 -0800523 * we'll update all the disk stuff, and oip->alloc_size
524 *
525 * expect stuff to be locked, a transaction started and enough data /
526 * metadata reservations in the contexts.
527 *
528 * Will return -EAGAIN, and a reason if a restart is needed.
529 * If passed in, *reason will always be set, even in error.
530 */
Tao Ma0eb8d472008-08-18 17:38:45 +0800531int ocfs2_add_inode_data(struct ocfs2_super *osb,
532 struct inode *inode,
533 u32 *logical_offset,
534 u32 clusters_to_add,
535 int mark_unwritten,
536 struct buffer_head *fe_bh,
537 handle_t *handle,
538 struct ocfs2_alloc_context *data_ac,
539 struct ocfs2_alloc_context *meta_ac,
540 enum ocfs2_alloc_restarted *reason_ret)
Mark Fashehccd979b2005-12-15 14:31:24 -0800541{
Joel Beckerf99b9b72008-08-20 19:36:33 -0700542 int ret;
543 struct ocfs2_extent_tree et;
Mark Fashehccd979b2005-12-15 14:31:24 -0800544
Joel Becker5e404e92009-02-13 03:54:22 -0800545 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh);
Joel Beckercbee7e12009-02-13 03:34:15 -0800546 ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset,
547 clusters_to_add, mark_unwritten,
548 data_ac, meta_ac, reason_ret);
Joel Beckerf99b9b72008-08-20 19:36:33 -0700549
550 return ret;
Mark Fashehccd979b2005-12-15 14:31:24 -0800551}
552
Mark Fasheh2ae99a62007-03-09 16:43:28 -0800553static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
554 u32 clusters_to_add, int mark_unwritten)
Mark Fashehccd979b2005-12-15 14:31:24 -0800555{
556 int status = 0;
557 int restart_func = 0;
Mark Fashehabf8b152007-01-17 13:07:24 -0800558 int credits;
Mark Fasheh2ae99a62007-03-09 16:43:28 -0800559 u32 prev_clusters;
Mark Fashehccd979b2005-12-15 14:31:24 -0800560 struct buffer_head *bh = NULL;
561 struct ocfs2_dinode *fe = NULL;
Mark Fasheh1fabe142006-10-09 18:11:45 -0700562 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800563 struct ocfs2_alloc_context *data_ac = NULL;
564 struct ocfs2_alloc_context *meta_ac = NULL;
565 enum ocfs2_alloc_restarted why;
566 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Joel Beckerf99b9b72008-08-20 19:36:33 -0700567 struct ocfs2_extent_tree et;
Jan Karaa90714c2008-10-09 19:38:40 +0200568 int did_quota = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -0800569
Mark Fashehdcd05382007-01-16 11:32:23 -0800570 /*
571 * This function only exists for file systems which don't
572 * support holes.
573 */
Mark Fasheh2ae99a62007-03-09 16:43:28 -0800574 BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb));
Mark Fashehdcd05382007-01-16 11:32:23 -0800575
Joel Beckerb657c952008-11-13 14:49:11 -0800576 status = ocfs2_read_inode_block(inode, &bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800577 if (status < 0) {
578 mlog_errno(status);
579 goto leave;
580 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800581 fe = (struct ocfs2_dinode *) bh->b_data;
Mark Fashehccd979b2005-12-15 14:31:24 -0800582
583restart_all:
584 BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters);
585
Joel Becker5e404e92009-02-13 03:54:22 -0800586 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh);
Joel Beckerf99b9b72008-08-20 19:36:33 -0700587 status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
588 &data_ac, &meta_ac);
Mark Fasheh9517bac2007-02-09 20:24:12 -0800589 if (status) {
590 mlog_errno(status);
591 goto leave;
592 }
593
Tao Ma811f9332008-08-18 17:38:43 +0800594 credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list,
595 clusters_to_add);
Mark Fasheh65eff9c2006-10-09 17:26:22 -0700596 handle = ocfs2_start_trans(osb, credits);
Mark Fashehccd979b2005-12-15 14:31:24 -0800597 if (IS_ERR(handle)) {
598 status = PTR_ERR(handle);
599 handle = NULL;
600 mlog_errno(status);
601 goto leave;
602 }
603
604restarted_transaction:
Tao Ma468eedd2011-02-22 22:14:41 +0800605 trace_ocfs2_extend_allocation(
606 (unsigned long long)OCFS2_I(inode)->ip_blkno,
607 (unsigned long long)i_size_read(inode),
608 le32_to_cpu(fe->i_clusters), clusters_to_add,
609 why, restart_func);
610
Christoph Hellwig5dd40562010-03-03 09:05:00 -0500611 status = dquot_alloc_space_nodirty(inode,
612 ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
613 if (status)
Jan Karaa90714c2008-10-09 19:38:40 +0200614 goto leave;
Jan Karaa90714c2008-10-09 19:38:40 +0200615 did_quota = 1;
616
Mark Fashehccd979b2005-12-15 14:31:24 -0800617 /* reserve a write to the file entry early on - that we if we
618 * run out of credits in the allocation path, we can still
619 * update i_size. */
Joel Becker0cf2f762009-02-12 16:41:25 -0800620 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
Joel Becker13723d02008-10-17 19:25:01 -0700621 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -0800622 if (status < 0) {
623 mlog_errno(status);
624 goto leave;
625 }
626
627 prev_clusters = OCFS2_I(inode)->ip_clusters;
628
Tao Ma0eb8d472008-08-18 17:38:45 +0800629 status = ocfs2_add_inode_data(osb,
630 inode,
631 &logical_start,
632 clusters_to_add,
633 mark_unwritten,
634 bh,
635 handle,
636 data_ac,
637 meta_ac,
638 &why);
Mark Fashehccd979b2005-12-15 14:31:24 -0800639 if ((status < 0) && (status != -EAGAIN)) {
640 if (status != -ENOSPC)
641 mlog_errno(status);
642 goto leave;
643 }
644
Joel Beckerec20cec2010-03-19 14:13:52 -0700645 ocfs2_journal_dirty(handle, bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800646
647 spin_lock(&OCFS2_I(inode)->ip_lock);
648 clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters);
649 spin_unlock(&OCFS2_I(inode)->ip_lock);
Jan Karaa90714c2008-10-09 19:38:40 +0200650 /* Release unused quota reservation */
Christoph Hellwig5dd40562010-03-03 09:05:00 -0500651 dquot_free_space(inode,
Jan Karaa90714c2008-10-09 19:38:40 +0200652 ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
653 did_quota = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -0800654
655 if (why != RESTART_NONE && clusters_to_add) {
656 if (why == RESTART_META) {
Mark Fashehccd979b2005-12-15 14:31:24 -0800657 restart_func = 1;
Tao Ma79681842010-04-16 13:59:25 +0800658 status = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -0800659 } else {
660 BUG_ON(why != RESTART_TRANS);
661
Mark Fashehccd979b2005-12-15 14:31:24 -0800662 /* TODO: This can be more intelligent. */
663 credits = ocfs2_calc_extend_credits(osb->sb,
Tao Ma811f9332008-08-18 17:38:43 +0800664 &fe->id2.i_list,
Mark Fashehccd979b2005-12-15 14:31:24 -0800665 clusters_to_add);
Mark Fasheh1fabe142006-10-09 18:11:45 -0700666 status = ocfs2_extend_trans(handle, credits);
Mark Fashehccd979b2005-12-15 14:31:24 -0800667 if (status < 0) {
668 /* handle still has to be committed at
669 * this point. */
670 status = -ENOMEM;
671 mlog_errno(status);
672 goto leave;
673 }
674 goto restarted_transaction;
675 }
676 }
677
Tao Ma468eedd2011-02-22 22:14:41 +0800678 trace_ocfs2_extend_allocation_end(OCFS2_I(inode)->ip_blkno,
Mark Fasheh1ca1a112007-04-27 16:01:25 -0700679 le32_to_cpu(fe->i_clusters),
Tao Ma468eedd2011-02-22 22:14:41 +0800680 (unsigned long long)le64_to_cpu(fe->i_size),
681 OCFS2_I(inode)->ip_clusters,
682 (unsigned long long)i_size_read(inode));
Mark Fashehccd979b2005-12-15 14:31:24 -0800683
684leave:
Jan Karaa90714c2008-10-09 19:38:40 +0200685 if (status < 0 && did_quota)
Christoph Hellwig5dd40562010-03-03 09:05:00 -0500686 dquot_free_space(inode,
Jan Karaa90714c2008-10-09 19:38:40 +0200687 ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
Mark Fashehccd979b2005-12-15 14:31:24 -0800688 if (handle) {
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700689 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800690 handle = NULL;
691 }
692 if (data_ac) {
693 ocfs2_free_alloc_context(data_ac);
694 data_ac = NULL;
695 }
696 if (meta_ac) {
697 ocfs2_free_alloc_context(meta_ac);
698 meta_ac = NULL;
699 }
700 if ((!status) && restart_func) {
701 restart_func = 0;
702 goto restart_all;
703 }
Mark Fasheha81cb882008-10-07 14:25:16 -0700704 brelse(bh);
705 bh = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800706
Mark Fashehccd979b2005-12-15 14:31:24 -0800707 return status;
708}
709
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700710/*
711 * While a write will already be ordering the data, a truncate will not.
712 * Thus, we need to explicitly order the zeroed pages.
713 */
714static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode)
715{
716 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
717 handle_t *handle = NULL;
718 int ret = 0;
719
720 if (!ocfs2_should_order_data(inode))
721 goto out;
722
723 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
724 if (IS_ERR(handle)) {
725 ret = -ENOMEM;
726 mlog_errno(ret);
727 goto out;
728 }
729
730 ret = ocfs2_jbd2_file_inode(handle, inode);
731 if (ret < 0)
732 mlog_errno(ret);
733
734out:
735 if (ret) {
736 if (!IS_ERR(handle))
737 ocfs2_commit_trans(osb, handle);
738 handle = ERR_PTR(ret);
739 }
740 return handle;
741}
742
Mark Fashehccd979b2005-12-15 14:31:24 -0800743/* Some parts of this taken from generic_cont_expand, which turned out
744 * to be too fragile to do exactly what we need without us having to
Nick Piggin4e02ed42008-10-29 14:00:55 -0700745 * worry about recursive locking in ->write_begin() and ->write_end(). */
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700746static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from,
747 u64 abs_to)
Mark Fashehccd979b2005-12-15 14:31:24 -0800748{
749 struct address_space *mapping = inode->i_mapping;
750 struct page *page;
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700751 unsigned long index = abs_from >> PAGE_CACHE_SHIFT;
Mark Fasheh1fabe142006-10-09 18:11:45 -0700752 handle_t *handle = NULL;
Joel Becker54532582010-07-16 13:32:33 -0700753 int ret = 0;
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700754 unsigned zero_from, zero_to, block_start, block_end;
Mark Fashehccd979b2005-12-15 14:31:24 -0800755
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700756 BUG_ON(abs_from >= abs_to);
757 BUG_ON(abs_to > (((u64)index + 1) << PAGE_CACHE_SHIFT));
758 BUG_ON(abs_from & (inode->i_blkbits - 1));
Mark Fashehccd979b2005-12-15 14:31:24 -0800759
Jan Kara9b4c0ff2010-08-24 14:28:03 +0200760 page = find_or_create_page(mapping, index, GFP_NOFS);
Mark Fashehccd979b2005-12-15 14:31:24 -0800761 if (!page) {
762 ret = -ENOMEM;
763 mlog_errno(ret);
764 goto out;
765 }
766
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700767 /* Get the offsets within the page that we want to zero */
768 zero_from = abs_from & (PAGE_CACHE_SIZE - 1);
769 zero_to = abs_to & (PAGE_CACHE_SIZE - 1);
770 if (!zero_to)
771 zero_to = PAGE_CACHE_SIZE;
Mark Fashehccd979b2005-12-15 14:31:24 -0800772
Tao Ma468eedd2011-02-22 22:14:41 +0800773 trace_ocfs2_write_zero_page(
774 (unsigned long long)OCFS2_I(inode)->ip_blkno,
775 (unsigned long long)abs_from,
776 (unsigned long long)abs_to,
777 index, zero_from, zero_to);
Joel Becker56934862010-07-01 15:13:31 -0700778
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700779 /* We know that zero_from is block aligned */
780 for (block_start = zero_from; block_start < zero_to;
781 block_start = block_end) {
782 block_end = block_start + (1 << inode->i_blkbits);
783
784 /*
Christoph Hellwigebdec242010-10-06 10:47:23 +0200785 * block_start is block-aligned. Bump it by one to force
786 * __block_write_begin and block_commit_write to zero the
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700787 * whole block.
788 */
Christoph Hellwigebdec242010-10-06 10:47:23 +0200789 ret = __block_write_begin(page, block_start + 1, 0,
790 ocfs2_get_block);
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700791 if (ret < 0) {
792 mlog_errno(ret);
Mark Fashehccd979b2005-12-15 14:31:24 -0800793 goto out_unlock;
794 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800795
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700796 if (!handle) {
797 handle = ocfs2_zero_start_ordered_transaction(inode);
798 if (IS_ERR(handle)) {
799 ret = PTR_ERR(handle);
800 handle = NULL;
801 break;
802 }
803 }
804
805 /* must not update i_size! */
806 ret = block_commit_write(page, block_start + 1,
807 block_start + 1);
808 if (ret < 0)
809 mlog_errno(ret);
810 else
811 ret = 0;
812 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800813
814 if (handle)
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700815 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700816
Mark Fashehccd979b2005-12-15 14:31:24 -0800817out_unlock:
818 unlock_page(page);
819 page_cache_release(page);
820out:
821 return ret;
822}
823
Joel Becker56934862010-07-01 15:13:31 -0700824/*
825 * Find the next range to zero. We do this in terms of bytes because
826 * that's what ocfs2_zero_extend() wants, and it is dealing with the
827 * pagecache. We may return multiple extents.
828 *
829 * zero_start and zero_end are ocfs2_zero_extend()s current idea of what
830 * needs to be zeroed. range_start and range_end return the next zeroing
831 * range. A subsequent call should pass the previous range_end as its
832 * zero_start. If range_end is 0, there's nothing to do.
833 *
834 * Unwritten extents are skipped over. Refcounted extents are CoWd.
835 */
836static int ocfs2_zero_extend_get_range(struct inode *inode,
837 struct buffer_head *di_bh,
838 u64 zero_start, u64 zero_end,
839 u64 *range_start, u64 *range_end)
Mark Fashehccd979b2005-12-15 14:31:24 -0800840{
Joel Becker56934862010-07-01 15:13:31 -0700841 int rc = 0, needs_cow = 0;
842 u32 p_cpos, zero_clusters = 0;
843 u32 zero_cpos =
844 zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
845 u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end);
846 unsigned int num_clusters = 0;
847 unsigned int ext_flags = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -0800848
Joel Becker56934862010-07-01 15:13:31 -0700849 while (zero_cpos < last_cpos) {
850 rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos,
851 &num_clusters, &ext_flags);
852 if (rc) {
853 mlog_errno(rc);
Mark Fashehccd979b2005-12-15 14:31:24 -0800854 goto out;
855 }
856
Joel Becker56934862010-07-01 15:13:31 -0700857 if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) {
858 zero_clusters = num_clusters;
859 if (ext_flags & OCFS2_EXT_REFCOUNTED)
860 needs_cow = 1;
861 break;
862 }
863
864 zero_cpos += num_clusters;
865 }
866 if (!zero_clusters) {
867 *range_end = 0;
868 goto out;
869 }
870
871 while ((zero_cpos + zero_clusters) < last_cpos) {
872 rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters,
873 &p_cpos, &num_clusters,
874 &ext_flags);
875 if (rc) {
876 mlog_errno(rc);
877 goto out;
878 }
879
880 if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN))
881 break;
882 if (ext_flags & OCFS2_EXT_REFCOUNTED)
883 needs_cow = 1;
884 zero_clusters += num_clusters;
885 }
886 if ((zero_cpos + zero_clusters) > last_cpos)
887 zero_clusters = last_cpos - zero_cpos;
888
889 if (needs_cow) {
Tao Ma15502712010-08-12 10:36:38 +0800890 rc = ocfs2_refcount_cow(inode, NULL, di_bh, zero_cpos,
891 zero_clusters, UINT_MAX);
Joel Becker56934862010-07-01 15:13:31 -0700892 if (rc) {
893 mlog_errno(rc);
894 goto out;
895 }
896 }
897
898 *range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos);
899 *range_end = ocfs2_clusters_to_bytes(inode->i_sb,
900 zero_cpos + zero_clusters);
901
902out:
903 return rc;
904}
905
906/*
907 * Zero one range returned from ocfs2_zero_extend_get_range(). The caller
908 * has made sure that the entire range needs zeroing.
909 */
910static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start,
911 u64 range_end)
912{
913 int rc = 0;
914 u64 next_pos;
915 u64 zero_pos = range_start;
916
Tao Ma468eedd2011-02-22 22:14:41 +0800917 trace_ocfs2_zero_extend_range(
918 (unsigned long long)OCFS2_I(inode)->ip_blkno,
919 (unsigned long long)range_start,
920 (unsigned long long)range_end);
Joel Becker56934862010-07-01 15:13:31 -0700921 BUG_ON(range_start >= range_end);
922
923 while (zero_pos < range_end) {
924 next_pos = (zero_pos & PAGE_CACHE_MASK) + PAGE_CACHE_SIZE;
925 if (next_pos > range_end)
926 next_pos = range_end;
927 rc = ocfs2_write_zero_page(inode, zero_pos, next_pos);
928 if (rc < 0) {
929 mlog_errno(rc);
930 break;
931 }
932 zero_pos = next_pos;
Mark Fashehe2057c52006-10-03 17:53:05 -0700933
934 /*
935 * Very large extends have the potential to lock up
936 * the cpu for extended periods of time.
937 */
938 cond_resched();
Mark Fashehccd979b2005-12-15 14:31:24 -0800939 }
940
Joel Becker56934862010-07-01 15:13:31 -0700941 return rc;
942}
943
944int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh,
945 loff_t zero_to_size)
946{
947 int ret = 0;
948 u64 zero_start, range_start = 0, range_end = 0;
949 struct super_block *sb = inode->i_sb;
950
951 zero_start = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode));
Tao Ma468eedd2011-02-22 22:14:41 +0800952 trace_ocfs2_zero_extend((unsigned long long)OCFS2_I(inode)->ip_blkno,
953 (unsigned long long)zero_start,
954 (unsigned long long)i_size_read(inode));
Joel Becker56934862010-07-01 15:13:31 -0700955 while (zero_start < zero_to_size) {
956 ret = ocfs2_zero_extend_get_range(inode, di_bh, zero_start,
957 zero_to_size,
958 &range_start,
959 &range_end);
960 if (ret) {
961 mlog_errno(ret);
962 break;
963 }
964 if (!range_end)
965 break;
966 /* Trim the ends */
967 if (range_start < zero_start)
968 range_start = zero_start;
969 if (range_end > zero_to_size)
970 range_end = zero_to_size;
971
972 ret = ocfs2_zero_extend_range(inode, range_start,
973 range_end);
974 if (ret) {
975 mlog_errno(ret);
976 break;
977 }
978 zero_start = range_end;
979 }
980
Mark Fashehccd979b2005-12-15 14:31:24 -0800981 return ret;
982}
983
Joel Becker56934862010-07-01 15:13:31 -0700984int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh,
985 u64 new_i_size, u64 zero_to)
Mark Fasheh65ed39d2007-08-28 17:13:23 -0700986{
987 int ret;
988 u32 clusters_to_add;
989 struct ocfs2_inode_info *oi = OCFS2_I(inode);
990
Joel Becker56934862010-07-01 15:13:31 -0700991 /*
992 * Only quota files call this without a bh, and they can't be
993 * refcounted.
994 */
995 BUG_ON(!di_bh && (oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL));
996 BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE));
997
Mark Fasheh65ed39d2007-08-28 17:13:23 -0700998 clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size);
999 if (clusters_to_add < oi->ip_clusters)
1000 clusters_to_add = 0;
1001 else
1002 clusters_to_add -= oi->ip_clusters;
1003
1004 if (clusters_to_add) {
1005 ret = __ocfs2_extend_allocation(inode, oi->ip_clusters,
1006 clusters_to_add, 0);
1007 if (ret) {
1008 mlog_errno(ret);
1009 goto out;
1010 }
1011 }
1012
1013 /*
1014 * Call this even if we don't add any clusters to the tree. We
1015 * still need to zero the area between the old i_size and the
1016 * new i_size.
1017 */
Joel Becker56934862010-07-01 15:13:31 -07001018 ret = ocfs2_zero_extend(inode, di_bh, zero_to);
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001019 if (ret < 0)
1020 mlog_errno(ret);
1021
1022out:
1023 return ret;
1024}
1025
Mark Fashehccd979b2005-12-15 14:31:24 -08001026static int ocfs2_extend_file(struct inode *inode,
1027 struct buffer_head *di_bh,
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001028 u64 new_i_size)
Mark Fashehccd979b2005-12-15 14:31:24 -08001029{
Mark Fashehc934a922007-10-18 15:23:46 -07001030 int ret = 0;
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001031 struct ocfs2_inode_info *oi = OCFS2_I(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001032
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001033 BUG_ON(!di_bh);
Mark Fasheh53013cb2006-05-05 19:04:03 -07001034
Mark Fashehccd979b2005-12-15 14:31:24 -08001035 /* setattr sometimes calls us like this. */
1036 if (new_i_size == 0)
1037 goto out;
1038
1039 if (i_size_read(inode) == new_i_size)
Joel Becker56934862010-07-01 15:13:31 -07001040 goto out;
Mark Fashehccd979b2005-12-15 14:31:24 -08001041 BUG_ON(new_i_size < i_size_read(inode));
1042
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001043 /*
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001044 * The alloc sem blocks people in read/write from reading our
1045 * allocation until we're done changing it. We depend on
1046 * i_mutex to block other extend/truncate calls while we're
Joel Becker56934862010-07-01 15:13:31 -07001047 * here. We even have to hold it for sparse files because there
1048 * might be some tail zeroing.
Mark Fasheh0effef72006-10-03 17:44:42 -07001049 */
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001050 down_write(&oi->ip_alloc_sem);
1051
1052 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1053 /*
1054 * We can optimize small extends by keeping the inodes
1055 * inline data.
1056 */
1057 if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) {
1058 up_write(&oi->ip_alloc_sem);
1059 goto out_update_size;
1060 }
1061
1062 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
1063 if (ret) {
1064 up_write(&oi->ip_alloc_sem);
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001065 mlog_errno(ret);
Mark Fashehc934a922007-10-18 15:23:46 -07001066 goto out;
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001067 }
1068 }
1069
Joel Becker56934862010-07-01 15:13:31 -07001070 if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
1071 ret = ocfs2_zero_extend(inode, di_bh, new_i_size);
1072 else
1073 ret = ocfs2_extend_no_holes(inode, di_bh, new_i_size,
1074 new_i_size);
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001075
1076 up_write(&oi->ip_alloc_sem);
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001077
Mark Fasheh0effef72006-10-03 17:44:42 -07001078 if (ret < 0) {
1079 mlog_errno(ret);
Mark Fashehc934a922007-10-18 15:23:46 -07001080 goto out;
Mark Fashehccd979b2005-12-15 14:31:24 -08001081 }
1082
Mark Fasheh3a0782d2007-01-17 12:53:31 -08001083out_update_size:
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001084 ret = ocfs2_simple_size_update(inode, di_bh, new_i_size);
1085 if (ret < 0)
1086 mlog_errno(ret);
Mark Fasheh53013cb2006-05-05 19:04:03 -07001087
Mark Fashehccd979b2005-12-15 14:31:24 -08001088out:
1089 return ret;
1090}
1091
1092int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
1093{
1094 int status = 0, size_change;
1095 struct inode *inode = dentry->d_inode;
1096 struct super_block *sb = inode->i_sb;
1097 struct ocfs2_super *osb = OCFS2_SB(sb);
1098 struct buffer_head *bh = NULL;
Mark Fasheh1fabe142006-10-09 18:11:45 -07001099 handle_t *handle = NULL;
Jan Kara65bac572009-06-02 14:24:01 +02001100 struct dquot *transfer_to[MAXQUOTAS] = { };
Jan Kara52a9ee22010-05-13 20:18:45 +02001101 int qtype;
Mark Fashehccd979b2005-12-15 14:31:24 -08001102
Tao Ma468eedd2011-02-22 22:14:41 +08001103 trace_ocfs2_setattr(inode, dentry,
1104 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1105 dentry->d_name.len, dentry->d_name.name,
1106 attr->ia_valid, attr->ia_mode,
1107 attr->ia_uid, attr->ia_gid);
Mark Fashehccd979b2005-12-15 14:31:24 -08001108
Sunil Mushranbc535802008-04-18 10:23:53 -07001109 /* ensuring we don't even attempt to truncate a symlink */
1110 if (S_ISLNK(inode->i_mode))
1111 attr->ia_valid &= ~ATTR_SIZE;
1112
Mark Fashehccd979b2005-12-15 14:31:24 -08001113#define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \
1114 | ATTR_GID | ATTR_UID | ATTR_MODE)
Tao Ma468eedd2011-02-22 22:14:41 +08001115 if (!(attr->ia_valid & OCFS2_VALID_ATTRS))
Mark Fashehccd979b2005-12-15 14:31:24 -08001116 return 0;
Mark Fashehccd979b2005-12-15 14:31:24 -08001117
1118 status = inode_change_ok(inode, attr);
1119 if (status)
1120 return status;
1121
Dmitry Monakhov12755622010-04-08 22:04:20 +04001122 if (is_quota_modification(inode, attr))
1123 dquot_initialize(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001124 size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE;
1125 if (size_change) {
1126 status = ocfs2_rw_lock(inode, 1);
1127 if (status < 0) {
1128 mlog_errno(status);
1129 goto bail;
1130 }
1131 }
1132
Mark Fashehe63aecb62007-10-18 15:30:42 -07001133 status = ocfs2_inode_lock(inode, &bh, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -08001134 if (status < 0) {
1135 if (status != -ENOENT)
1136 mlog_errno(status);
1137 goto bail_unlock_rw;
1138 }
1139
1140 if (size_change && attr->ia_size != i_size_read(inode)) {
Wengang Wang5051f762010-02-26 18:18:25 +08001141 status = inode_newsize_ok(inode, attr->ia_size);
1142 if (status)
Mark Fashehce76fd32007-07-20 12:02:14 -07001143 goto bail_unlock;
Mark Fashehce76fd32007-07-20 12:02:14 -07001144
Joel Becker2b4e30f2008-09-03 20:03:41 -07001145 if (i_size_read(inode) > attr->ia_size) {
1146 if (ocfs2_should_order_data(inode)) {
1147 status = ocfs2_begin_ordered_truncate(inode,
1148 attr->ia_size);
1149 if (status)
1150 goto bail_unlock;
1151 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001152 status = ocfs2_truncate_file(inode, bh, attr->ia_size);
Joel Becker2b4e30f2008-09-03 20:03:41 -07001153 } else
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001154 status = ocfs2_extend_file(inode, bh, attr->ia_size);
Mark Fashehccd979b2005-12-15 14:31:24 -08001155 if (status < 0) {
1156 if (status != -ENOSPC)
1157 mlog_errno(status);
1158 status = -ENOSPC;
1159 goto bail_unlock;
1160 }
1161 }
1162
Jan Karaa90714c2008-10-09 19:38:40 +02001163 if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
1164 (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
Jan Kara65bac572009-06-02 14:24:01 +02001165 /*
1166 * Gather pointers to quota structures so that allocation /
1167 * freeing of quota structures happens here and not inside
Christoph Hellwigb43fa822010-03-03 09:05:03 -05001168 * dquot_transfer() where we have problems with lock ordering
Jan Kara65bac572009-06-02 14:24:01 +02001169 */
Jan Karaa90714c2008-10-09 19:38:40 +02001170 if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid
1171 && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1172 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
Jan Kara65bac572009-06-02 14:24:01 +02001173 transfer_to[USRQUOTA] = dqget(sb, attr->ia_uid,
1174 USRQUOTA);
Jan Kara52a9ee22010-05-13 20:18:45 +02001175 if (!transfer_to[USRQUOTA]) {
Jan Kara65bac572009-06-02 14:24:01 +02001176 status = -ESRCH;
Jan Karaa90714c2008-10-09 19:38:40 +02001177 goto bail_unlock;
Jan Kara65bac572009-06-02 14:24:01 +02001178 }
Jan Karaa90714c2008-10-09 19:38:40 +02001179 }
1180 if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid
1181 && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1182 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
Jan Kara65bac572009-06-02 14:24:01 +02001183 transfer_to[GRPQUOTA] = dqget(sb, attr->ia_gid,
1184 GRPQUOTA);
Jan Kara52a9ee22010-05-13 20:18:45 +02001185 if (!transfer_to[GRPQUOTA]) {
Jan Kara65bac572009-06-02 14:24:01 +02001186 status = -ESRCH;
Jan Karaa90714c2008-10-09 19:38:40 +02001187 goto bail_unlock;
Jan Kara65bac572009-06-02 14:24:01 +02001188 }
Jan Karaa90714c2008-10-09 19:38:40 +02001189 }
Jan Kara65bac572009-06-02 14:24:01 +02001190 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS +
1191 2 * ocfs2_quota_trans_credits(sb));
Jan Karaa90714c2008-10-09 19:38:40 +02001192 if (IS_ERR(handle)) {
1193 status = PTR_ERR(handle);
1194 mlog_errno(status);
1195 goto bail_unlock;
1196 }
Jan Kara52a9ee22010-05-13 20:18:45 +02001197 status = __dquot_transfer(inode, transfer_to);
Jan Karaa90714c2008-10-09 19:38:40 +02001198 if (status < 0)
1199 goto bail_commit;
1200 } else {
1201 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1202 if (IS_ERR(handle)) {
1203 status = PTR_ERR(handle);
1204 mlog_errno(status);
1205 goto bail_unlock;
1206 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001207 }
1208
Mark Fasheh7307de82007-05-09 15:16:19 -07001209 /*
Christoph Hellwig2c27c652010-06-04 11:30:04 +02001210 * This will intentionally not wind up calling truncate_setsize(),
Mark Fasheh7307de82007-05-09 15:16:19 -07001211 * since all the work for a size change has been done above.
1212 * Otherwise, we could get into problems with truncate as
1213 * ip_alloc_sem is used there to protect against i_size
1214 * changes.
Christoph Hellwig10257742010-06-04 11:30:02 +02001215 *
1216 * XXX: this means the conditional below can probably be removed.
Mark Fasheh7307de82007-05-09 15:16:19 -07001217 */
Christoph Hellwig10257742010-06-04 11:30:02 +02001218 if ((attr->ia_valid & ATTR_SIZE) &&
1219 attr->ia_size != i_size_read(inode)) {
1220 status = vmtruncate(inode, attr->ia_size);
1221 if (status) {
1222 mlog_errno(status);
1223 goto bail_commit;
1224 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001225 }
1226
Christoph Hellwig10257742010-06-04 11:30:02 +02001227 setattr_copy(inode, attr);
1228 mark_inode_dirty(inode);
1229
Mark Fashehccd979b2005-12-15 14:31:24 -08001230 status = ocfs2_mark_inode_dirty(handle, inode, bh);
1231 if (status < 0)
1232 mlog_errno(status);
1233
1234bail_commit:
Mark Fasheh02dc1af2006-10-09 16:48:10 -07001235 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -08001236bail_unlock:
Mark Fashehe63aecb62007-10-18 15:30:42 -07001237 ocfs2_inode_unlock(inode, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -08001238bail_unlock_rw:
1239 if (size_change)
1240 ocfs2_rw_unlock(inode, 1);
1241bail:
Mark Fasheha81cb882008-10-07 14:25:16 -07001242 brelse(bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08001243
Jan Kara65bac572009-06-02 14:24:01 +02001244 /* Release quota pointers in case we acquired them */
Jan Kara52a9ee22010-05-13 20:18:45 +02001245 for (qtype = 0; qtype < MAXQUOTAS; qtype++)
Jan Kara65bac572009-06-02 14:24:01 +02001246 dqput(transfer_to[qtype]);
Jan Kara65bac572009-06-02 14:24:01 +02001247
Tiger Yang060bc662008-11-14 11:17:29 +08001248 if (!status && attr->ia_valid & ATTR_MODE) {
1249 status = ocfs2_acl_chmod(inode);
1250 if (status < 0)
1251 mlog_errno(status);
1252 }
1253
Mark Fashehccd979b2005-12-15 14:31:24 -08001254 return status;
1255}
1256
1257int ocfs2_getattr(struct vfsmount *mnt,
1258 struct dentry *dentry,
1259 struct kstat *stat)
1260{
1261 struct inode *inode = dentry->d_inode;
1262 struct super_block *sb = dentry->d_inode->i_sb;
1263 struct ocfs2_super *osb = sb->s_fs_info;
1264 int err;
1265
Mark Fashehccd979b2005-12-15 14:31:24 -08001266 err = ocfs2_inode_revalidate(dentry);
1267 if (err) {
1268 if (err != -ENOENT)
1269 mlog_errno(err);
1270 goto bail;
1271 }
1272
1273 generic_fillattr(inode, stat);
1274
1275 /* We set the blksize from the cluster size for performance */
1276 stat->blksize = osb->s_clustersize;
1277
1278bail:
Mark Fashehccd979b2005-12-15 14:31:24 -08001279 return err;
1280}
1281
Nick Pigginb74c79e2011-01-07 17:49:58 +11001282int ocfs2_permission(struct inode *inode, int mask, unsigned int flags)
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001283{
1284 int ret;
1285
Nick Pigginb74c79e2011-01-07 17:49:58 +11001286 if (flags & IPERM_FLAG_RCU)
1287 return -ECHILD;
1288
Mark Fashehe63aecb62007-10-18 15:30:42 -07001289 ret = ocfs2_inode_lock(inode, NULL, 0);
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001290 if (ret) {
Mark Fasheha9f5f702007-04-26 11:43:43 -07001291 if (ret != -ENOENT)
1292 mlog_errno(ret);
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001293 goto out;
1294 }
1295
Nick Pigginb74c79e2011-01-07 17:49:58 +11001296 ret = generic_permission(inode, mask, flags, ocfs2_check_acl);
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001297
Mark Fashehe63aecb62007-10-18 15:30:42 -07001298 ocfs2_inode_unlock(inode, 0);
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001299out:
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001300 return ret;
1301}
1302
Mark Fashehb2580102007-03-09 16:53:21 -08001303static int __ocfs2_write_remove_suid(struct inode *inode,
1304 struct buffer_head *bh)
Mark Fashehccd979b2005-12-15 14:31:24 -08001305{
1306 int ret;
Mark Fasheh1fabe142006-10-09 18:11:45 -07001307 handle_t *handle;
Mark Fashehccd979b2005-12-15 14:31:24 -08001308 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1309 struct ocfs2_dinode *di;
1310
Tao Ma468eedd2011-02-22 22:14:41 +08001311 trace_ocfs2_write_remove_suid(
1312 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1313 inode->i_mode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001314
Mark Fasheh65eff9c2006-10-09 17:26:22 -07001315 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
Jan Karafa38e922008-10-20 19:23:51 +02001316 if (IS_ERR(handle)) {
1317 ret = PTR_ERR(handle);
Mark Fashehccd979b2005-12-15 14:31:24 -08001318 mlog_errno(ret);
1319 goto out;
1320 }
1321
Joel Becker0cf2f762009-02-12 16:41:25 -08001322 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
Joel Becker13723d02008-10-17 19:25:01 -07001323 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -08001324 if (ret < 0) {
1325 mlog_errno(ret);
Mark Fashehb2580102007-03-09 16:53:21 -08001326 goto out_trans;
Mark Fashehccd979b2005-12-15 14:31:24 -08001327 }
1328
1329 inode->i_mode &= ~S_ISUID;
1330 if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP))
1331 inode->i_mode &= ~S_ISGID;
1332
1333 di = (struct ocfs2_dinode *) bh->b_data;
1334 di->i_mode = cpu_to_le16(inode->i_mode);
1335
Joel Beckerec20cec2010-03-19 14:13:52 -07001336 ocfs2_journal_dirty(handle, bh);
Mark Fashehb2580102007-03-09 16:53:21 -08001337
Mark Fashehccd979b2005-12-15 14:31:24 -08001338out_trans:
Mark Fasheh02dc1af2006-10-09 16:48:10 -07001339 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -08001340out:
Mark Fashehccd979b2005-12-15 14:31:24 -08001341 return ret;
1342}
1343
Mark Fasheh9517bac2007-02-09 20:24:12 -08001344/*
1345 * Will look for holes and unwritten extents in the range starting at
1346 * pos for count bytes (inclusive).
1347 */
1348static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos,
1349 size_t count)
1350{
1351 int ret = 0;
Mark Fasheh49cb8d22007-03-09 16:21:46 -08001352 unsigned int extent_flags;
Mark Fasheh9517bac2007-02-09 20:24:12 -08001353 u32 cpos, clusters, extent_len, phys_cpos;
1354 struct super_block *sb = inode->i_sb;
1355
1356 cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits;
1357 clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
1358
1359 while (clusters) {
Mark Fasheh49cb8d22007-03-09 16:21:46 -08001360 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
1361 &extent_flags);
Mark Fasheh9517bac2007-02-09 20:24:12 -08001362 if (ret < 0) {
1363 mlog_errno(ret);
1364 goto out;
1365 }
1366
Mark Fasheh49cb8d22007-03-09 16:21:46 -08001367 if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) {
Mark Fasheh9517bac2007-02-09 20:24:12 -08001368 ret = 1;
1369 break;
1370 }
1371
1372 if (extent_len > clusters)
1373 extent_len = clusters;
1374
1375 clusters -= extent_len;
1376 cpos += extent_len;
1377 }
1378out:
1379 return ret;
1380}
1381
Mark Fashehb2580102007-03-09 16:53:21 -08001382static int ocfs2_write_remove_suid(struct inode *inode)
1383{
1384 int ret;
1385 struct buffer_head *bh = NULL;
Mark Fashehb2580102007-03-09 16:53:21 -08001386
Joel Beckerb657c952008-11-13 14:49:11 -08001387 ret = ocfs2_read_inode_block(inode, &bh);
Mark Fashehb2580102007-03-09 16:53:21 -08001388 if (ret < 0) {
1389 mlog_errno(ret);
1390 goto out;
1391 }
1392
1393 ret = __ocfs2_write_remove_suid(inode, bh);
1394out:
1395 brelse(bh);
1396 return ret;
1397}
1398
Mark Fasheh2ae99a62007-03-09 16:43:28 -08001399/*
1400 * Allocate enough extents to cover the region starting at byte offset
1401 * start for len bytes. Existing extents are skipped, any extents
1402 * added are marked as "unwritten".
1403 */
1404static int ocfs2_allocate_unwritten_extents(struct inode *inode,
1405 u64 start, u64 len)
1406{
1407 int ret;
1408 u32 cpos, phys_cpos, clusters, alloc_size;
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001409 u64 end = start + len;
1410 struct buffer_head *di_bh = NULL;
1411
1412 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
Joel Beckerb657c952008-11-13 14:49:11 -08001413 ret = ocfs2_read_inode_block(inode, &di_bh);
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001414 if (ret) {
1415 mlog_errno(ret);
1416 goto out;
1417 }
1418
1419 /*
1420 * Nothing to do if the requested reservation range
1421 * fits within the inode.
1422 */
1423 if (ocfs2_size_fits_inline_data(di_bh, end))
1424 goto out;
1425
1426 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
1427 if (ret) {
1428 mlog_errno(ret);
1429 goto out;
1430 }
1431 }
Mark Fasheh2ae99a62007-03-09 16:43:28 -08001432
1433 /*
1434 * We consider both start and len to be inclusive.
1435 */
1436 cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
1437 clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len);
1438 clusters -= cpos;
1439
1440 while (clusters) {
1441 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
1442 &alloc_size, NULL);
1443 if (ret) {
1444 mlog_errno(ret);
1445 goto out;
1446 }
1447
1448 /*
1449 * Hole or existing extent len can be arbitrary, so
1450 * cap it to our own allocation request.
1451 */
1452 if (alloc_size > clusters)
1453 alloc_size = clusters;
1454
1455 if (phys_cpos) {
1456 /*
1457 * We already have an allocation at this
1458 * region so we can safely skip it.
1459 */
1460 goto next;
1461 }
1462
1463 ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
1464 if (ret) {
1465 if (ret != -ENOSPC)
1466 mlog_errno(ret);
1467 goto out;
1468 }
1469
1470next:
1471 cpos += alloc_size;
1472 clusters -= alloc_size;
1473 }
1474
1475 ret = 0;
1476out:
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001477
1478 brelse(di_bh);
Mark Fasheh2ae99a62007-03-09 16:43:28 -08001479 return ret;
1480}
1481
Mark Fasheh063c4562007-07-03 13:34:11 -07001482/*
1483 * Truncate a byte range, avoiding pages within partial clusters. This
1484 * preserves those pages for the zeroing code to write to.
1485 */
1486static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start,
1487 u64 byte_len)
1488{
1489 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1490 loff_t start, end;
1491 struct address_space *mapping = inode->i_mapping;
1492
1493 start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start);
1494 end = byte_start + byte_len;
1495 end = end & ~(osb->s_clustersize - 1);
1496
1497 if (start < end) {
1498 unmap_mapping_range(mapping, start, end - start, 0);
1499 truncate_inode_pages_range(mapping, start, end - 1);
1500 }
1501}
1502
1503static int ocfs2_zero_partial_clusters(struct inode *inode,
1504 u64 start, u64 len)
1505{
1506 int ret = 0;
1507 u64 tmpend, end = start + len;
1508 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1509 unsigned int csize = osb->s_clustersize;
1510 handle_t *handle;
1511
1512 /*
1513 * The "start" and "end" values are NOT necessarily part of
1514 * the range whose allocation is being deleted. Rather, this
1515 * is what the user passed in with the request. We must zero
1516 * partial clusters here. There's no need to worry about
1517 * physical allocation - the zeroing code knows to skip holes.
1518 */
Tao Ma468eedd2011-02-22 22:14:41 +08001519 trace_ocfs2_zero_partial_clusters(
1520 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1521 (unsigned long long)start, (unsigned long long)end);
Mark Fasheh063c4562007-07-03 13:34:11 -07001522
1523 /*
1524 * If both edges are on a cluster boundary then there's no
1525 * zeroing required as the region is part of the allocation to
1526 * be truncated.
1527 */
1528 if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0)
1529 goto out;
1530
1531 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
Jan Karafa38e922008-10-20 19:23:51 +02001532 if (IS_ERR(handle)) {
1533 ret = PTR_ERR(handle);
Mark Fasheh063c4562007-07-03 13:34:11 -07001534 mlog_errno(ret);
1535 goto out;
1536 }
1537
1538 /*
1539 * We want to get the byte offset of the end of the 1st cluster.
1540 */
1541 tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1));
1542 if (tmpend > end)
1543 tmpend = end;
1544
Tao Ma468eedd2011-02-22 22:14:41 +08001545 trace_ocfs2_zero_partial_clusters_range1((unsigned long long)start,
1546 (unsigned long long)tmpend);
Mark Fasheh063c4562007-07-03 13:34:11 -07001547
1548 ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend);
1549 if (ret)
1550 mlog_errno(ret);
1551
1552 if (tmpend < end) {
1553 /*
1554 * This may make start and end equal, but the zeroing
1555 * code will skip any work in that case so there's no
1556 * need to catch it up here.
1557 */
1558 start = end & ~(osb->s_clustersize - 1);
1559
Tao Ma468eedd2011-02-22 22:14:41 +08001560 trace_ocfs2_zero_partial_clusters_range2(
1561 (unsigned long long)start, (unsigned long long)end);
Mark Fasheh063c4562007-07-03 13:34:11 -07001562
1563 ret = ocfs2_zero_range_for_truncate(inode, handle, start, end);
1564 if (ret)
1565 mlog_errno(ret);
1566 }
1567
1568 ocfs2_commit_trans(osb, handle);
1569out:
1570 return ret;
1571}
1572
Tristan Yec1631d42010-05-11 17:54:45 +08001573static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos)
1574{
1575 int i;
1576 struct ocfs2_extent_rec *rec = NULL;
1577
1578 for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
1579
1580 rec = &el->l_recs[i];
1581
1582 if (le32_to_cpu(rec->e_cpos) < pos)
1583 break;
1584 }
1585
1586 return i;
1587}
1588
1589/*
1590 * Helper to calculate the punching pos and length in one run, we handle the
1591 * following three cases in order:
1592 *
1593 * - remove the entire record
1594 * - remove a partial record
1595 * - no record needs to be removed (hole-punching completed)
1596*/
1597static void ocfs2_calc_trunc_pos(struct inode *inode,
1598 struct ocfs2_extent_list *el,
1599 struct ocfs2_extent_rec *rec,
1600 u32 trunc_start, u32 *trunc_cpos,
1601 u32 *trunc_len, u32 *trunc_end,
1602 u64 *blkno, int *done)
1603{
1604 int ret = 0;
1605 u32 coff, range;
1606
1607 range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);
1608
1609 if (le32_to_cpu(rec->e_cpos) >= trunc_start) {
Tristan Ye9a790ba2011-05-12 20:47:07 +08001610 /*
1611 * remove an entire extent record.
1612 */
Tristan Yec1631d42010-05-11 17:54:45 +08001613 *trunc_cpos = le32_to_cpu(rec->e_cpos);
1614 /*
1615 * Skip holes if any.
1616 */
1617 if (range < *trunc_end)
1618 *trunc_end = range;
1619 *trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos);
1620 *blkno = le64_to_cpu(rec->e_blkno);
1621 *trunc_end = le32_to_cpu(rec->e_cpos);
1622 } else if (range > trunc_start) {
Tristan Ye9a790ba2011-05-12 20:47:07 +08001623 /*
1624 * remove a partial extent record, which means we're
1625 * removing the last extent record.
1626 */
Tristan Yec1631d42010-05-11 17:54:45 +08001627 *trunc_cpos = trunc_start;
Tristan Ye9a790ba2011-05-12 20:47:07 +08001628 /*
1629 * skip hole if any.
1630 */
1631 if (range < *trunc_end)
1632 *trunc_end = range;
Tristan Yec1631d42010-05-11 17:54:45 +08001633 *trunc_len = *trunc_end - trunc_start;
1634 coff = trunc_start - le32_to_cpu(rec->e_cpos);
1635 *blkno = le64_to_cpu(rec->e_blkno) +
1636 ocfs2_clusters_to_blocks(inode->i_sb, coff);
1637 *trunc_end = trunc_start;
1638 } else {
1639 /*
1640 * It may have two following possibilities:
1641 *
1642 * - last record has been removed
1643 * - trunc_start was within a hole
1644 *
1645 * both two cases mean the completion of hole punching.
1646 */
1647 ret = 1;
1648 }
1649
1650 *done = ret;
1651}
1652
Mark Fasheh063c4562007-07-03 13:34:11 -07001653static int ocfs2_remove_inode_range(struct inode *inode,
1654 struct buffer_head *di_bh, u64 byte_start,
1655 u64 byte_len)
1656{
Tristan Yec1631d42010-05-11 17:54:45 +08001657 int ret = 0, flags = 0, done = 0, i;
1658 u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos;
1659 u32 cluster_in_el;
Mark Fasheh063c4562007-07-03 13:34:11 -07001660 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1661 struct ocfs2_cached_dealloc_ctxt dealloc;
Mark Fashehb1967d02007-11-20 11:56:39 -08001662 struct address_space *mapping = inode->i_mapping;
Mark Fashehfecc0112008-11-12 15:16:38 -08001663 struct ocfs2_extent_tree et;
Tristan Yec1631d42010-05-11 17:54:45 +08001664 struct ocfs2_path *path = NULL;
1665 struct ocfs2_extent_list *el = NULL;
1666 struct ocfs2_extent_rec *rec = NULL;
Tristan Yee8aec062010-05-11 17:54:43 +08001667 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
Tristan Yec1631d42010-05-11 17:54:45 +08001668 u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc);
Mark Fasheh063c4562007-07-03 13:34:11 -07001669
Joel Becker5e404e92009-02-13 03:54:22 -08001670 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh);
Mark Fasheh063c4562007-07-03 13:34:11 -07001671 ocfs2_init_dealloc_ctxt(&dealloc);
1672
Tao Ma468eedd2011-02-22 22:14:41 +08001673 trace_ocfs2_remove_inode_range(
1674 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1675 (unsigned long long)byte_start,
1676 (unsigned long long)byte_len);
1677
Mark Fasheh063c4562007-07-03 13:34:11 -07001678 if (byte_len == 0)
1679 return 0;
1680
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001681 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1682 ret = ocfs2_truncate_inline(inode, di_bh, byte_start,
Mark Fashehb1967d02007-11-20 11:56:39 -08001683 byte_start + byte_len, 0);
1684 if (ret) {
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001685 mlog_errno(ret);
Mark Fashehb1967d02007-11-20 11:56:39 -08001686 goto out;
1687 }
1688 /*
1689 * There's no need to get fancy with the page cache
1690 * truncate of an inline-data inode. We're talking
1691 * about less than a page here, which will be cached
1692 * in the dinode buffer anyway.
1693 */
1694 unmap_mapping_range(mapping, 0, 0, 0);
1695 truncate_inode_pages(mapping, 0);
1696 goto out;
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001697 }
1698
Tristan Yee8aec062010-05-11 17:54:43 +08001699 /*
1700 * For reflinks, we may need to CoW 2 clusters which might be
1701 * partially zero'd later, if hole's start and end offset were
1702 * within one cluster(means is not exactly aligned to clustersize).
1703 */
Mark Fasheh063c4562007-07-03 13:34:11 -07001704
Tristan Yee8aec062010-05-11 17:54:43 +08001705 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) {
1706
1707 ret = ocfs2_cow_file_pos(inode, di_bh, byte_start);
1708 if (ret) {
1709 mlog_errno(ret);
1710 goto out;
1711 }
1712
1713 ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len);
1714 if (ret) {
1715 mlog_errno(ret);
1716 goto out;
1717 }
1718 }
1719
Mark Fasheh063c4562007-07-03 13:34:11 -07001720 trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
Tristan Yec1631d42010-05-11 17:54:45 +08001721 trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits;
1722 cluster_in_el = trunc_end;
Mark Fasheh063c4562007-07-03 13:34:11 -07001723
Mark Fasheh063c4562007-07-03 13:34:11 -07001724 ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len);
1725 if (ret) {
1726 mlog_errno(ret);
1727 goto out;
1728 }
1729
Tristan Yec1631d42010-05-11 17:54:45 +08001730 path = ocfs2_new_path_from_et(&et);
1731 if (!path) {
1732 ret = -ENOMEM;
1733 mlog_errno(ret);
1734 goto out;
1735 }
1736
1737 while (trunc_end > trunc_start) {
1738
1739 ret = ocfs2_find_path(INODE_CACHE(inode), path,
1740 cluster_in_el);
Mark Fasheh063c4562007-07-03 13:34:11 -07001741 if (ret) {
1742 mlog_errno(ret);
1743 goto out;
1744 }
1745
Tristan Yec1631d42010-05-11 17:54:45 +08001746 el = path_leaf_el(path);
Mark Fasheh063c4562007-07-03 13:34:11 -07001747
Tristan Yec1631d42010-05-11 17:54:45 +08001748 i = ocfs2_find_rec(el, trunc_end);
1749 /*
1750 * Need to go to previous extent block.
1751 */
1752 if (i < 0) {
1753 if (path->p_tree_depth == 0)
1754 break;
1755
1756 ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb,
1757 path,
1758 &cluster_in_el);
Mark Fasheh063c4562007-07-03 13:34:11 -07001759 if (ret) {
1760 mlog_errno(ret);
1761 goto out;
1762 }
Tristan Yec1631d42010-05-11 17:54:45 +08001763
1764 /*
1765 * We've reached the leftmost extent block,
1766 * it's safe to leave.
1767 */
1768 if (cluster_in_el == 0)
1769 break;
1770
1771 /*
1772 * The 'pos' searched for previous extent block is
1773 * always one cluster less than actual trunc_end.
1774 */
1775 trunc_end = cluster_in_el + 1;
1776
1777 ocfs2_reinit_path(path, 1);
1778
1779 continue;
1780
1781 } else
1782 rec = &el->l_recs[i];
1783
1784 ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos,
1785 &trunc_len, &trunc_end, &blkno, &done);
1786 if (done)
1787 break;
1788
1789 flags = rec->e_flags;
1790 phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno);
1791
1792 ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos,
1793 phys_cpos, trunc_len, flags,
1794 &dealloc, refcount_loc);
1795 if (ret < 0) {
1796 mlog_errno(ret);
1797 goto out;
Mark Fasheh063c4562007-07-03 13:34:11 -07001798 }
1799
Tristan Yec1631d42010-05-11 17:54:45 +08001800 cluster_in_el = trunc_end;
1801
1802 ocfs2_reinit_path(path, 1);
Mark Fasheh063c4562007-07-03 13:34:11 -07001803 }
1804
1805 ocfs2_truncate_cluster_pages(inode, byte_start, byte_len);
1806
1807out:
1808 ocfs2_schedule_truncate_log_flush(osb, 1);
1809 ocfs2_run_deallocs(osb, &dealloc);
1810
1811 return ret;
1812}
1813
Mark Fashehb2580102007-03-09 16:53:21 -08001814/*
1815 * Parts of this function taken from xfs_change_file_space()
1816 */
Mark Fasheh385820a2007-07-19 00:14:38 -07001817static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
1818 loff_t f_pos, unsigned int cmd,
1819 struct ocfs2_space_resv *sr,
1820 int change_size)
Mark Fashehb2580102007-03-09 16:53:21 -08001821{
1822 int ret;
1823 s64 llen;
Mark Fasheh385820a2007-07-19 00:14:38 -07001824 loff_t size;
Mark Fashehb2580102007-03-09 16:53:21 -08001825 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1826 struct buffer_head *di_bh = NULL;
1827 handle_t *handle;
Mark Fasheha00cce32007-07-20 11:28:30 -07001828 unsigned long long max_off = inode->i_sb->s_maxbytes;
Mark Fashehb2580102007-03-09 16:53:21 -08001829
Mark Fashehb2580102007-03-09 16:53:21 -08001830 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
1831 return -EROFS;
1832
1833 mutex_lock(&inode->i_mutex);
1834
1835 /*
1836 * This prevents concurrent writes on other nodes
1837 */
1838 ret = ocfs2_rw_lock(inode, 1);
1839 if (ret) {
1840 mlog_errno(ret);
1841 goto out;
1842 }
1843
Mark Fashehe63aecb62007-10-18 15:30:42 -07001844 ret = ocfs2_inode_lock(inode, &di_bh, 1);
Mark Fashehb2580102007-03-09 16:53:21 -08001845 if (ret) {
1846 mlog_errno(ret);
1847 goto out_rw_unlock;
1848 }
1849
1850 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
1851 ret = -EPERM;
Mark Fashehe63aecb62007-10-18 15:30:42 -07001852 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001853 }
1854
1855 switch (sr->l_whence) {
1856 case 0: /*SEEK_SET*/
1857 break;
1858 case 1: /*SEEK_CUR*/
Mark Fasheh385820a2007-07-19 00:14:38 -07001859 sr->l_start += f_pos;
Mark Fashehb2580102007-03-09 16:53:21 -08001860 break;
1861 case 2: /*SEEK_END*/
1862 sr->l_start += i_size_read(inode);
1863 break;
1864 default:
1865 ret = -EINVAL;
Mark Fashehe63aecb62007-10-18 15:30:42 -07001866 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001867 }
1868 sr->l_whence = 0;
1869
1870 llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len;
1871
1872 if (sr->l_start < 0
1873 || sr->l_start > max_off
1874 || (sr->l_start + llen) < 0
1875 || (sr->l_start + llen) > max_off) {
1876 ret = -EINVAL;
Mark Fashehe63aecb62007-10-18 15:30:42 -07001877 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001878 }
Mark Fasheh385820a2007-07-19 00:14:38 -07001879 size = sr->l_start + sr->l_len;
Mark Fashehb2580102007-03-09 16:53:21 -08001880
1881 if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) {
1882 if (sr->l_len <= 0) {
1883 ret = -EINVAL;
Mark Fashehe63aecb62007-10-18 15:30:42 -07001884 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001885 }
1886 }
1887
Mark Fasheh385820a2007-07-19 00:14:38 -07001888 if (file && should_remove_suid(file->f_path.dentry)) {
Mark Fashehb2580102007-03-09 16:53:21 -08001889 ret = __ocfs2_write_remove_suid(inode, di_bh);
1890 if (ret) {
1891 mlog_errno(ret);
Mark Fashehe63aecb62007-10-18 15:30:42 -07001892 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001893 }
1894 }
1895
1896 down_write(&OCFS2_I(inode)->ip_alloc_sem);
1897 switch (cmd) {
1898 case OCFS2_IOC_RESVSP:
1899 case OCFS2_IOC_RESVSP64:
1900 /*
1901 * This takes unsigned offsets, but the signed ones we
1902 * pass have been checked against overflow above.
1903 */
1904 ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start,
1905 sr->l_len);
1906 break;
1907 case OCFS2_IOC_UNRESVSP:
1908 case OCFS2_IOC_UNRESVSP64:
1909 ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start,
1910 sr->l_len);
1911 break;
1912 default:
1913 ret = -EINVAL;
1914 }
1915 up_write(&OCFS2_I(inode)->ip_alloc_sem);
1916 if (ret) {
1917 mlog_errno(ret);
Mark Fashehe63aecb62007-10-18 15:30:42 -07001918 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001919 }
1920
1921 /*
1922 * We update c/mtime for these changes
1923 */
1924 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1925 if (IS_ERR(handle)) {
1926 ret = PTR_ERR(handle);
1927 mlog_errno(ret);
Mark Fashehe63aecb62007-10-18 15:30:42 -07001928 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001929 }
1930
Mark Fasheh385820a2007-07-19 00:14:38 -07001931 if (change_size && i_size_read(inode) < size)
1932 i_size_write(inode, size);
1933
Mark Fashehb2580102007-03-09 16:53:21 -08001934 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
1935 ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
1936 if (ret < 0)
1937 mlog_errno(ret);
1938
1939 ocfs2_commit_trans(osb, handle);
1940
Mark Fashehe63aecb62007-10-18 15:30:42 -07001941out_inode_unlock:
Mark Fashehb2580102007-03-09 16:53:21 -08001942 brelse(di_bh);
Mark Fashehe63aecb62007-10-18 15:30:42 -07001943 ocfs2_inode_unlock(inode, 1);
Mark Fashehb2580102007-03-09 16:53:21 -08001944out_rw_unlock:
1945 ocfs2_rw_unlock(inode, 1);
1946
Mark Fashehb2580102007-03-09 16:53:21 -08001947out:
Julia Lawallc259ae52008-07-21 09:59:15 +02001948 mutex_unlock(&inode->i_mutex);
Mark Fashehb2580102007-03-09 16:53:21 -08001949 return ret;
1950}
1951
Mark Fasheh385820a2007-07-19 00:14:38 -07001952int ocfs2_change_file_space(struct file *file, unsigned int cmd,
1953 struct ocfs2_space_resv *sr)
1954{
1955 struct inode *inode = file->f_path.dentry->d_inode;
Fernando Carrijoc19a28e2009-01-07 18:09:08 -08001956 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Mark Fasheh385820a2007-07-19 00:14:38 -07001957
1958 if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
1959 !ocfs2_writes_unwritten_extents(osb))
1960 return -ENOTTY;
1961 else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&
1962 !ocfs2_sparse_alloc(osb))
1963 return -ENOTTY;
1964
1965 if (!S_ISREG(inode->i_mode))
1966 return -EINVAL;
1967
1968 if (!(file->f_mode & FMODE_WRITE))
1969 return -EBADF;
1970
1971 return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
1972}
1973
Christoph Hellwig2fe17c12011-01-14 13:07:43 +01001974static long ocfs2_fallocate(struct file *file, int mode, loff_t offset,
Mark Fasheh385820a2007-07-19 00:14:38 -07001975 loff_t len)
1976{
Christoph Hellwig2fe17c12011-01-14 13:07:43 +01001977 struct inode *inode = file->f_path.dentry->d_inode;
Mark Fasheh385820a2007-07-19 00:14:38 -07001978 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1979 struct ocfs2_space_resv sr;
1980 int change_size = 1;
Josef Bacikdb47fef2010-11-17 20:46:17 -05001981 int cmd = OCFS2_IOC_RESVSP64;
Mark Fasheh385820a2007-07-19 00:14:38 -07001982
Christoph Hellwig64c23e82011-01-14 13:07:30 +01001983 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
1984 return -EOPNOTSUPP;
Mark Fasheh385820a2007-07-19 00:14:38 -07001985 if (!ocfs2_writes_unwritten_extents(osb))
1986 return -EOPNOTSUPP;
1987
Mark Fasheh385820a2007-07-19 00:14:38 -07001988 if (mode & FALLOC_FL_KEEP_SIZE)
1989 change_size = 0;
1990
Josef Bacikdb47fef2010-11-17 20:46:17 -05001991 if (mode & FALLOC_FL_PUNCH_HOLE)
1992 cmd = OCFS2_IOC_UNRESVSP64;
1993
Mark Fasheh385820a2007-07-19 00:14:38 -07001994 sr.l_whence = 0;
1995 sr.l_start = (s64)offset;
1996 sr.l_len = (s64)len;
1997
Josef Bacikdb47fef2010-11-17 20:46:17 -05001998 return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr,
1999 change_size);
Mark Fasheh385820a2007-07-19 00:14:38 -07002000}
2001
Tao Ma293b2f72009-08-25 08:02:48 +08002002int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos,
2003 size_t count)
2004{
2005 int ret = 0;
2006 unsigned int extent_flags;
2007 u32 cpos, clusters, extent_len, phys_cpos;
2008 struct super_block *sb = inode->i_sb;
2009
2010 if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) ||
Tao Ma2f48d592009-10-15 11:10:49 +08002011 !(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) ||
2012 OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
Tao Ma293b2f72009-08-25 08:02:48 +08002013 return 0;
2014
2015 cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits;
2016 clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
2017
2018 while (clusters) {
2019 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
2020 &extent_flags);
2021 if (ret < 0) {
2022 mlog_errno(ret);
2023 goto out;
2024 }
2025
2026 if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) {
2027 ret = 1;
2028 break;
2029 }
2030
2031 if (extent_len > clusters)
2032 extent_len = clusters;
2033
2034 clusters -= extent_len;
2035 cpos += extent_len;
2036 }
2037out:
2038 return ret;
2039}
2040
2041static int ocfs2_prepare_inode_for_refcount(struct inode *inode,
Tao Mab8908232010-08-12 10:27:14 +08002042 struct file *file,
Tao Ma293b2f72009-08-25 08:02:48 +08002043 loff_t pos, size_t count,
2044 int *meta_level)
2045{
2046 int ret;
2047 struct buffer_head *di_bh = NULL;
2048 u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
2049 u32 clusters =
2050 ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos;
2051
2052 ret = ocfs2_inode_lock(inode, &di_bh, 1);
2053 if (ret) {
2054 mlog_errno(ret);
2055 goto out;
2056 }
2057
2058 *meta_level = 1;
2059
Tao Ma15502712010-08-12 10:36:38 +08002060 ret = ocfs2_refcount_cow(inode, file, di_bh, cpos, clusters, UINT_MAX);
Tao Ma293b2f72009-08-25 08:02:48 +08002061 if (ret)
2062 mlog_errno(ret);
2063out:
2064 brelse(di_bh);
2065 return ret;
2066}
2067
Tao Mab8908232010-08-12 10:27:14 +08002068static int ocfs2_prepare_inode_for_write(struct file *file,
Tiger Yang8659ac22006-10-17 18:29:52 -07002069 loff_t *ppos,
2070 size_t count,
Mark Fasheh9517bac2007-02-09 20:24:12 -08002071 int appending,
Tao Ma86470e92009-12-03 21:55:05 +08002072 int *direct_io,
2073 int *has_refcount)
Mark Fashehccd979b2005-12-15 14:31:24 -08002074{
Mark Fasheh65ed39d2007-08-28 17:13:23 -07002075 int ret = 0, meta_level = 0;
Tao Mab8908232010-08-12 10:27:14 +08002076 struct dentry *dentry = file->f_path.dentry;
Tiger Yang8659ac22006-10-17 18:29:52 -07002077 struct inode *inode = dentry->d_inode;
Tao Ma468eedd2011-02-22 22:14:41 +08002078 loff_t saved_pos = 0, end;
Mark Fashehccd979b2005-12-15 14:31:24 -08002079
Sunil Mushran2bd63212010-01-25 16:57:38 -08002080 /*
Mark Fasheh65ed39d2007-08-28 17:13:23 -07002081 * We start with a read level meta lock and only jump to an ex
2082 * if we need to make modifications here.
Mark Fashehccd979b2005-12-15 14:31:24 -08002083 */
Mark Fashehccd979b2005-12-15 14:31:24 -08002084 for(;;) {
Mark Fashehe63aecb62007-10-18 15:30:42 -07002085 ret = ocfs2_inode_lock(inode, NULL, meta_level);
Mark Fashehccd979b2005-12-15 14:31:24 -08002086 if (ret < 0) {
2087 meta_level = -1;
2088 mlog_errno(ret);
2089 goto out;
2090 }
2091
2092 /* Clear suid / sgid if necessary. We do this here
2093 * instead of later in the write path because
2094 * remove_suid() calls ->setattr without any hint that
2095 * we may have already done our cluster locking. Since
2096 * ocfs2_setattr() *must* take cluster locks to
2097 * proceeed, this will lead us to recursively lock the
2098 * inode. There's also the dinode i_size state which
2099 * can be lost via setattr during extending writes (we
2100 * set inode->i_size at the end of a write. */
Tiger Yang8659ac22006-10-17 18:29:52 -07002101 if (should_remove_suid(dentry)) {
Mark Fashehccd979b2005-12-15 14:31:24 -08002102 if (meta_level == 0) {
Mark Fashehe63aecb62007-10-18 15:30:42 -07002103 ocfs2_inode_unlock(inode, meta_level);
Mark Fashehccd979b2005-12-15 14:31:24 -08002104 meta_level = 1;
2105 continue;
2106 }
2107
2108 ret = ocfs2_write_remove_suid(inode);
2109 if (ret < 0) {
2110 mlog_errno(ret);
Tiger Yang8659ac22006-10-17 18:29:52 -07002111 goto out_unlock;
Mark Fashehccd979b2005-12-15 14:31:24 -08002112 }
2113 }
2114
2115 /* work on a copy of ppos until we're sure that we won't have
2116 * to recalculate it due to relocking. */
Tao Ma468eedd2011-02-22 22:14:41 +08002117 if (appending)
Mark Fashehccd979b2005-12-15 14:31:24 -08002118 saved_pos = i_size_read(inode);
Tao Ma468eedd2011-02-22 22:14:41 +08002119 else
Tiger Yang8659ac22006-10-17 18:29:52 -07002120 saved_pos = *ppos;
Mark Fasheh3a0782d2007-01-17 12:53:31 -08002121
Mark Fasheh65ed39d2007-08-28 17:13:23 -07002122 end = saved_pos + count;
Mark Fasheh9517bac2007-02-09 20:24:12 -08002123
Tao Ma293b2f72009-08-25 08:02:48 +08002124 ret = ocfs2_check_range_for_refcount(inode, saved_pos, count);
2125 if (ret == 1) {
2126 ocfs2_inode_unlock(inode, meta_level);
2127 meta_level = -1;
2128
2129 ret = ocfs2_prepare_inode_for_refcount(inode,
Tao Mab8908232010-08-12 10:27:14 +08002130 file,
Tao Ma293b2f72009-08-25 08:02:48 +08002131 saved_pos,
2132 count,
2133 &meta_level);
Tao Ma86470e92009-12-03 21:55:05 +08002134 if (has_refcount)
2135 *has_refcount = 1;
Wengang Wang96a1cc72010-02-09 14:57:45 +08002136 if (direct_io)
2137 *direct_io = 0;
Tao Ma293b2f72009-08-25 08:02:48 +08002138 }
2139
2140 if (ret < 0) {
2141 mlog_errno(ret);
2142 goto out_unlock;
2143 }
2144
Mark Fasheh65ed39d2007-08-28 17:13:23 -07002145 /*
2146 * Skip the O_DIRECT checks if we don't need
2147 * them.
2148 */
2149 if (!direct_io || !(*direct_io))
2150 break;
Mark Fasheh9517bac2007-02-09 20:24:12 -08002151
Mark Fasheh65ed39d2007-08-28 17:13:23 -07002152 /*
Mark Fasheh1afc32b2007-09-07 14:46:51 -07002153 * There's no sane way to do direct writes to an inode
2154 * with inline data.
2155 */
2156 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
2157 *direct_io = 0;
2158 break;
2159 }
2160
2161 /*
Mark Fasheh65ed39d2007-08-28 17:13:23 -07002162 * Allowing concurrent direct writes means
2163 * i_size changes wouldn't be synchronized, so
2164 * one node could wind up truncating another
2165 * nodes writes.
2166 */
2167 if (end > i_size_read(inode)) {
2168 *direct_io = 0;
Mark Fasheh9517bac2007-02-09 20:24:12 -08002169 break;
2170 }
2171
Mark Fasheh3a0782d2007-01-17 12:53:31 -08002172 /*
Mark Fasheh65ed39d2007-08-28 17:13:23 -07002173 * We don't fill holes during direct io, so
2174 * check for them here. If any are found, the
2175 * caller will have to retake some cluster
2176 * locks and initiate the io as buffered.
Mark Fasheh3a0782d2007-01-17 12:53:31 -08002177 */
Mark Fasheh65ed39d2007-08-28 17:13:23 -07002178 ret = ocfs2_check_range_for_holes(inode, saved_pos, count);
2179 if (ret == 1) {
2180 *direct_io = 0;
2181 ret = 0;
2182 } else if (ret < 0)
2183 mlog_errno(ret);
Mark Fashehccd979b2005-12-15 14:31:24 -08002184 break;
2185 }
2186
Tiger Yang8659ac22006-10-17 18:29:52 -07002187 if (appending)
2188 *ppos = saved_pos;
2189
2190out_unlock:
Tao Ma468eedd2011-02-22 22:14:41 +08002191 trace_ocfs2_prepare_inode_for_write(OCFS2_I(inode)->ip_blkno,
2192 saved_pos, appending, count,
2193 direct_io, has_refcount);
2194
Tao Ma293b2f72009-08-25 08:02:48 +08002195 if (meta_level >= 0)
2196 ocfs2_inode_unlock(inode, meta_level);
Tiger Yang8659ac22006-10-17 18:29:52 -07002197
2198out:
2199 return ret;
2200}
2201
2202static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
2203 const struct iovec *iov,
2204 unsigned long nr_segs,
2205 loff_t pos)
2206{
Mark Fasheh9517bac2007-02-09 20:24:12 -08002207 int ret, direct_io, appending, rw_level, have_alloc_sem = 0;
Tao Ma86470e92009-12-03 21:55:05 +08002208 int can_do_direct, has_refcount = 0;
Mark Fasheh9517bac2007-02-09 20:24:12 -08002209 ssize_t written = 0;
2210 size_t ocount; /* original count */
2211 size_t count; /* after file limit checks */
Mark Fasheh9ea2d322007-10-18 14:14:45 -07002212 loff_t old_size, *ppos = &iocb->ki_pos;
2213 u32 old_clusters;
Mark Fasheh9517bac2007-02-09 20:24:12 -08002214 struct file *file = iocb->ki_filp;
2215 struct inode *inode = file->f_path.dentry->d_inode;
Mark Fasheh9ea2d322007-10-18 14:14:45 -07002216 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Tristan Ye7bdb0d12010-10-11 16:46:39 +08002217 int full_coherency = !(osb->s_mount_opt &
2218 OCFS2_MOUNT_COHERENCY_BUFFERED);
Tiger Yang8659ac22006-10-17 18:29:52 -07002219
Tao Ma468eedd2011-02-22 22:14:41 +08002220 trace_ocfs2_file_aio_write(inode, file, file->f_path.dentry,
2221 (unsigned long long)OCFS2_I(inode)->ip_blkno,
2222 file->f_path.dentry->d_name.len,
2223 file->f_path.dentry->d_name.name,
2224 (unsigned int)nr_segs);
Tiger Yang8659ac22006-10-17 18:29:52 -07002225
Tiger Yang8659ac22006-10-17 18:29:52 -07002226 if (iocb->ki_left == 0)
2227 return 0;
2228
Mark Fasheh9517bac2007-02-09 20:24:12 -08002229 vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
2230
2231 appending = file->f_flags & O_APPEND ? 1 : 0;
2232 direct_io = file->f_flags & O_DIRECT ? 1 : 0;
2233
Tiger Yang8659ac22006-10-17 18:29:52 -07002234 mutex_lock(&inode->i_mutex);
Mark Fasheh9517bac2007-02-09 20:24:12 -08002235
Tristan Ye39c99f12010-12-07 14:35:07 +08002236 ocfs2_iocb_clear_sem_locked(iocb);
2237
Mark Fasheh9517bac2007-02-09 20:24:12 -08002238relock:
Tiger Yang8659ac22006-10-17 18:29:52 -07002239 /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */
Mark Fasheh9517bac2007-02-09 20:24:12 -08002240 if (direct_io) {
Tiger Yang8659ac22006-10-17 18:29:52 -07002241 down_read(&inode->i_alloc_sem);
Mark Fasheh9517bac2007-02-09 20:24:12 -08002242 have_alloc_sem = 1;
Tristan Ye39c99f12010-12-07 14:35:07 +08002243 /* communicate with ocfs2_dio_end_io */
2244 ocfs2_iocb_set_sem_locked(iocb);
Tiger Yang8659ac22006-10-17 18:29:52 -07002245 }
2246
Tristan Ye7bdb0d12010-10-11 16:46:39 +08002247 /*
2248 * Concurrent O_DIRECT writes are allowed with
2249 * mount_option "coherency=buffered".
2250 */
2251 rw_level = (!direct_io || full_coherency);
2252
Tiger Yang8659ac22006-10-17 18:29:52 -07002253 ret = ocfs2_rw_lock(inode, rw_level);
2254 if (ret < 0) {
Mark Fasheh9517bac2007-02-09 20:24:12 -08002255 mlog_errno(ret);
2256 goto out_sems;
2257 }
2258
Tristan Ye7bdb0d12010-10-11 16:46:39 +08002259 /*
2260 * O_DIRECT writes with "coherency=full" need to take EX cluster
2261 * inode_lock to guarantee coherency.
2262 */
2263 if (direct_io && full_coherency) {
2264 /*
2265 * We need to take and drop the inode lock to force
2266 * other nodes to drop their caches. Buffered I/O
2267 * already does this in write_begin().
2268 */
2269 ret = ocfs2_inode_lock(inode, NULL, 1);
2270 if (ret < 0) {
2271 mlog_errno(ret);
2272 goto out_sems;
2273 }
2274
2275 ocfs2_inode_unlock(inode, 1);
2276 }
2277
Mark Fasheh9517bac2007-02-09 20:24:12 -08002278 can_do_direct = direct_io;
Tao Mab8908232010-08-12 10:27:14 +08002279 ret = ocfs2_prepare_inode_for_write(file, ppos,
Mark Fasheh9517bac2007-02-09 20:24:12 -08002280 iocb->ki_left, appending,
Tao Ma86470e92009-12-03 21:55:05 +08002281 &can_do_direct, &has_refcount);
Mark Fasheh9517bac2007-02-09 20:24:12 -08002282 if (ret < 0) {
Tiger Yang8659ac22006-10-17 18:29:52 -07002283 mlog_errno(ret);
2284 goto out;
2285 }
2286
Mark Fasheh9517bac2007-02-09 20:24:12 -08002287 /*
2288 * We can't complete the direct I/O as requested, fall back to
2289 * buffered I/O.
2290 */
2291 if (direct_io && !can_do_direct) {
2292 ocfs2_rw_unlock(inode, rw_level);
2293 up_read(&inode->i_alloc_sem);
2294
2295 have_alloc_sem = 0;
2296 rw_level = -1;
2297
2298 direct_io = 0;
Mark Fasheh9517bac2007-02-09 20:24:12 -08002299 goto relock;
Tiger Yang8659ac22006-10-17 18:29:52 -07002300 }
Mark Fashehccd979b2005-12-15 14:31:24 -08002301
Mark Fasheh9ea2d322007-10-18 14:14:45 -07002302 /*
2303 * To later detect whether a journal commit for sync writes is
2304 * necessary, we sample i_size, and cluster count here.
2305 */
2306 old_size = i_size_read(inode);
2307 old_clusters = OCFS2_I(inode)->ip_clusters;
2308
Mark Fashehccd979b2005-12-15 14:31:24 -08002309 /* communicate with ocfs2_dio_end_io */
Mark Fasheh7cdfc3a2007-04-16 17:28:51 -07002310 ocfs2_iocb_set_rw_locked(iocb, rw_level);
Mark Fashehccd979b2005-12-15 14:31:24 -08002311
Li Dongyang6b933c82010-04-17 17:49:10 +08002312 ret = generic_segment_checks(iov, &nr_segs, &ocount,
2313 VERIFY_READ);
2314 if (ret)
2315 goto out_dio;
2316
2317 count = ocount;
2318 ret = generic_write_checks(file, ppos, &count,
2319 S_ISBLK(inode->i_mode));
2320 if (ret)
2321 goto out_dio;
2322
Mark Fasheh9517bac2007-02-09 20:24:12 -08002323 if (direct_io) {
2324 written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
2325 ppos, count, ocount);
2326 if (written < 0) {
2327 ret = written;
2328 goto out_dio;
2329 }
2330 } else {
Li Dongyang6b933c82010-04-17 17:49:10 +08002331 current->backing_dev_info = file->f_mapping->backing_dev_info;
2332 written = generic_file_buffered_write(iocb, iov, nr_segs, *ppos,
2333 ppos, count, 0);
2334 current->backing_dev_info = NULL;
Mark Fasheh9517bac2007-02-09 20:24:12 -08002335 }
Mark Fashehccd979b2005-12-15 14:31:24 -08002336
Mark Fasheh9517bac2007-02-09 20:24:12 -08002337out_dio:
Mark Fashehccd979b2005-12-15 14:31:24 -08002338 /* buffered aio wouldn't have proper lock coverage today */
Mark Fasheh9517bac2007-02-09 20:24:12 -08002339 BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT));
Mark Fashehccd979b2005-12-15 14:31:24 -08002340
Tao Ma60c48672010-02-03 09:56:04 +08002341 if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) ||
Tristan Ye81c8c822010-08-19 15:15:00 +08002342 ((file->f_flags & O_DIRECT) && !direct_io)) {
Jan Kara918941a2009-08-17 18:50:08 +02002343 ret = filemap_fdatawrite_range(file->f_mapping, pos,
2344 pos + count - 1);
2345 if (ret < 0)
2346 written = ret;
2347
Coly Lia03ab782010-03-26 05:15:12 +08002348 if (!ret && ((old_size != i_size_read(inode)) ||
2349 (old_clusters != OCFS2_I(inode)->ip_clusters) ||
2350 has_refcount)) {
Joel Becker2b4e30f2008-09-03 20:03:41 -07002351 ret = jbd2_journal_force_commit(osb->journal->j_journal);
Mark Fasheh9ea2d322007-10-18 14:14:45 -07002352 if (ret < 0)
2353 written = ret;
2354 }
Jan Kara918941a2009-08-17 18:50:08 +02002355
2356 if (!ret)
2357 ret = filemap_fdatawait_range(file->f_mapping, pos,
2358 pos + count - 1);
Mark Fasheh9ea2d322007-10-18 14:14:45 -07002359 }
2360
Sunil Mushran2bd63212010-01-25 16:57:38 -08002361 /*
Mark Fashehccd979b2005-12-15 14:31:24 -08002362 * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
2363 * function pointer which is called when o_direct io completes so that
2364 * it can unlock our rw lock. (it's the clustered equivalent of
2365 * i_alloc_sem; protects truncate from racing with pending ios).
2366 * Unfortunately there are error cases which call end_io and others
2367 * that don't. so we don't have to unlock the rw_lock if either an
2368 * async dio is going to do it in the future or an end_io after an
2369 * error has already done it.
2370 */
Coly Li66b116c2010-02-25 14:57:13 +08002371 if ((ret == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) {
Mark Fashehccd979b2005-12-15 14:31:24 -08002372 rw_level = -1;
2373 have_alloc_sem = 0;
2374 }
2375
2376out:
Mark Fasheh9517bac2007-02-09 20:24:12 -08002377 if (rw_level != -1)
2378 ocfs2_rw_unlock(inode, rw_level);
2379
2380out_sems:
Tristan Ye39c99f12010-12-07 14:35:07 +08002381 if (have_alloc_sem) {
Mark Fashehccd979b2005-12-15 14:31:24 -08002382 up_read(&inode->i_alloc_sem);
Tristan Ye39c99f12010-12-07 14:35:07 +08002383 ocfs2_iocb_clear_sem_locked(iocb);
2384 }
Mark Fasheh9517bac2007-02-09 20:24:12 -08002385
Jes Sorensen1b1dcc12006-01-09 15:59:24 -08002386 mutex_unlock(&inode->i_mutex);
Mark Fashehccd979b2005-12-15 14:31:24 -08002387
Wengang Wang812e7a62009-07-10 13:26:04 +08002388 if (written)
2389 ret = written;
Wengang Wang812e7a62009-07-10 13:26:04 +08002390 return ret;
Mark Fashehccd979b2005-12-15 14:31:24 -08002391}
2392
Miklos Szeredi328eaab2009-04-14 19:48:39 +02002393static int ocfs2_splice_to_file(struct pipe_inode_info *pipe,
2394 struct file *out,
2395 struct splice_desc *sd)
2396{
2397 int ret;
2398
Tao Mab8908232010-08-12 10:27:14 +08002399 ret = ocfs2_prepare_inode_for_write(out, &sd->pos,
Tao Ma86470e92009-12-03 21:55:05 +08002400 sd->total_len, 0, NULL, NULL);
Miklos Szeredi328eaab2009-04-14 19:48:39 +02002401 if (ret < 0) {
2402 mlog_errno(ret);
2403 return ret;
2404 }
2405
2406 return splice_from_pipe_feed(pipe, sd, pipe_to_file);
2407}
2408
Tiger Yang8659ac22006-10-17 18:29:52 -07002409static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe,
2410 struct file *out,
2411 loff_t *ppos,
2412 size_t len,
2413 unsigned int flags)
2414{
2415 int ret;
Miklos Szeredi328eaab2009-04-14 19:48:39 +02002416 struct address_space *mapping = out->f_mapping;
2417 struct inode *inode = mapping->host;
2418 struct splice_desc sd = {
2419 .total_len = len,
2420 .flags = flags,
2421 .pos = *ppos,
2422 .u.file = out,
2423 };
Tiger Yang8659ac22006-10-17 18:29:52 -07002424
Tao Ma468eedd2011-02-22 22:14:41 +08002425
2426 trace_ocfs2_file_splice_write(inode, out, out->f_path.dentry,
2427 (unsigned long long)OCFS2_I(inode)->ip_blkno,
2428 out->f_path.dentry->d_name.len,
2429 out->f_path.dentry->d_name.name, len);
Tiger Yang8659ac22006-10-17 18:29:52 -07002430
Miklos Szeredi7bfac9e2009-04-06 17:41:00 +02002431 if (pipe->inode)
Miklos Szeredi328eaab2009-04-14 19:48:39 +02002432 mutex_lock_nested(&pipe->inode->i_mutex, I_MUTEX_PARENT);
2433
2434 splice_from_pipe_begin(&sd);
2435 do {
2436 ret = splice_from_pipe_next(pipe, &sd);
2437 if (ret <= 0)
2438 break;
2439
2440 mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD);
2441 ret = ocfs2_rw_lock(inode, 1);
2442 if (ret < 0)
2443 mlog_errno(ret);
2444 else {
2445 ret = ocfs2_splice_to_file(pipe, out, &sd);
2446 ocfs2_rw_unlock(inode, 1);
2447 }
2448 mutex_unlock(&inode->i_mutex);
2449 } while (ret > 0);
2450 splice_from_pipe_end(pipe, &sd);
2451
Miklos Szeredi7bfac9e2009-04-06 17:41:00 +02002452 if (pipe->inode)
2453 mutex_unlock(&pipe->inode->i_mutex);
Tiger Yang8659ac22006-10-17 18:29:52 -07002454
Miklos Szeredi328eaab2009-04-14 19:48:39 +02002455 if (sd.num_spliced)
2456 ret = sd.num_spliced;
2457
2458 if (ret > 0) {
2459 unsigned long nr_pages;
Jan Karad23c9372009-08-18 18:24:31 +02002460 int err;
Miklos Szeredi328eaab2009-04-14 19:48:39 +02002461
Miklos Szeredi328eaab2009-04-14 19:48:39 +02002462 nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
2463
Jan Karad23c9372009-08-18 18:24:31 +02002464 err = generic_write_sync(out, *ppos, ret);
2465 if (err)
2466 ret = err;
2467 else
2468 *ppos += ret;
Miklos Szeredi328eaab2009-04-14 19:48:39 +02002469
Miklos Szeredi328eaab2009-04-14 19:48:39 +02002470 balance_dirty_pages_ratelimited_nr(mapping, nr_pages);
2471 }
Tiger Yang8659ac22006-10-17 18:29:52 -07002472
Tiger Yang8659ac22006-10-17 18:29:52 -07002473 return ret;
2474}
2475
2476static ssize_t ocfs2_file_splice_read(struct file *in,
2477 loff_t *ppos,
2478 struct pipe_inode_info *pipe,
2479 size_t len,
2480 unsigned int flags)
2481{
Tao Ma1962f392009-06-19 15:36:52 +08002482 int ret = 0, lock_level = 0;
Josef Sipekd28c9172006-12-08 02:37:25 -08002483 struct inode *inode = in->f_path.dentry->d_inode;
Tiger Yang8659ac22006-10-17 18:29:52 -07002484
Tao Ma468eedd2011-02-22 22:14:41 +08002485 trace_ocfs2_file_splice_read(inode, in, in->f_path.dentry,
2486 (unsigned long long)OCFS2_I(inode)->ip_blkno,
2487 in->f_path.dentry->d_name.len,
2488 in->f_path.dentry->d_name.name, len);
Tiger Yang8659ac22006-10-17 18:29:52 -07002489
2490 /*
2491 * See the comment in ocfs2_file_aio_read()
2492 */
Tao Ma1962f392009-06-19 15:36:52 +08002493 ret = ocfs2_inode_lock_atime(inode, in->f_vfsmnt, &lock_level);
Tiger Yang8659ac22006-10-17 18:29:52 -07002494 if (ret < 0) {
2495 mlog_errno(ret);
2496 goto bail;
2497 }
Tao Ma1962f392009-06-19 15:36:52 +08002498 ocfs2_inode_unlock(inode, lock_level);
Tiger Yang8659ac22006-10-17 18:29:52 -07002499
2500 ret = generic_file_splice_read(in, ppos, pipe, len, flags);
2501
2502bail:
Tiger Yang8659ac22006-10-17 18:29:52 -07002503 return ret;
2504}
2505
Mark Fashehccd979b2005-12-15 14:31:24 -08002506static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
Badari Pulavarty027445c2006-09-30 23:28:46 -07002507 const struct iovec *iov,
2508 unsigned long nr_segs,
Mark Fashehccd979b2005-12-15 14:31:24 -08002509 loff_t pos)
2510{
Tiger Yang25899de2006-11-15 15:49:02 +08002511 int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -08002512 struct file *filp = iocb->ki_filp;
Josef Sipekd28c9172006-12-08 02:37:25 -08002513 struct inode *inode = filp->f_path.dentry->d_inode;
Mark Fashehccd979b2005-12-15 14:31:24 -08002514
Tao Ma468eedd2011-02-22 22:14:41 +08002515 trace_ocfs2_file_aio_read(inode, filp, filp->f_path.dentry,
2516 (unsigned long long)OCFS2_I(inode)->ip_blkno,
2517 filp->f_path.dentry->d_name.len,
2518 filp->f_path.dentry->d_name.name, nr_segs);
2519
Mark Fashehccd979b2005-12-15 14:31:24 -08002520
2521 if (!inode) {
2522 ret = -EINVAL;
2523 mlog_errno(ret);
2524 goto bail;
2525 }
2526
Tristan Ye39c99f12010-12-07 14:35:07 +08002527 ocfs2_iocb_clear_sem_locked(iocb);
2528
Sunil Mushran2bd63212010-01-25 16:57:38 -08002529 /*
Mark Fashehccd979b2005-12-15 14:31:24 -08002530 * buffered reads protect themselves in ->readpage(). O_DIRECT reads
2531 * need locks to protect pending reads from racing with truncate.
2532 */
2533 if (filp->f_flags & O_DIRECT) {
2534 down_read(&inode->i_alloc_sem);
2535 have_alloc_sem = 1;
Tristan Ye39c99f12010-12-07 14:35:07 +08002536 ocfs2_iocb_set_sem_locked(iocb);
Mark Fashehccd979b2005-12-15 14:31:24 -08002537
2538 ret = ocfs2_rw_lock(inode, 0);
2539 if (ret < 0) {
2540 mlog_errno(ret);
2541 goto bail;
2542 }
2543 rw_level = 0;
2544 /* communicate with ocfs2_dio_end_io */
Mark Fasheh7cdfc3a2007-04-16 17:28:51 -07002545 ocfs2_iocb_set_rw_locked(iocb, rw_level);
Mark Fashehccd979b2005-12-15 14:31:24 -08002546 }
2547
Mark Fashehc4374f82006-05-05 19:04:35 -07002548 /*
2549 * We're fine letting folks race truncates and extending
2550 * writes with read across the cluster, just like they can
2551 * locally. Hence no rw_lock during read.
Sunil Mushran2bd63212010-01-25 16:57:38 -08002552 *
Mark Fashehc4374f82006-05-05 19:04:35 -07002553 * Take and drop the meta data lock to update inode fields
2554 * like i_size. This allows the checks down below
Sunil Mushran2bd63212010-01-25 16:57:38 -08002555 * generic_file_aio_read() a chance of actually working.
Mark Fashehc4374f82006-05-05 19:04:35 -07002556 */
Mark Fashehe63aecb62007-10-18 15:30:42 -07002557 ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level);
Mark Fashehc4374f82006-05-05 19:04:35 -07002558 if (ret < 0) {
2559 mlog_errno(ret);
2560 goto bail;
2561 }
Mark Fashehe63aecb62007-10-18 15:30:42 -07002562 ocfs2_inode_unlock(inode, lock_level);
Mark Fashehc4374f82006-05-05 19:04:35 -07002563
Badari Pulavarty027445c2006-09-30 23:28:46 -07002564 ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos);
Tao Ma468eedd2011-02-22 22:14:41 +08002565 trace_generic_file_aio_read_ret(ret);
Mark Fashehccd979b2005-12-15 14:31:24 -08002566
2567 /* buffered aio wouldn't have proper lock coverage today */
2568 BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT));
2569
2570 /* see ocfs2_file_aio_write */
2571 if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
2572 rw_level = -1;
2573 have_alloc_sem = 0;
2574 }
2575
2576bail:
Tristan Ye39c99f12010-12-07 14:35:07 +08002577 if (have_alloc_sem) {
Mark Fashehccd979b2005-12-15 14:31:24 -08002578 up_read(&inode->i_alloc_sem);
Tristan Ye39c99f12010-12-07 14:35:07 +08002579 ocfs2_iocb_clear_sem_locked(iocb);
2580 }
Sunil Mushran2bd63212010-01-25 16:57:38 -08002581 if (rw_level != -1)
Mark Fashehccd979b2005-12-15 14:31:24 -08002582 ocfs2_rw_unlock(inode, rw_level);
Mark Fashehccd979b2005-12-15 14:31:24 -08002583
2584 return ret;
2585}
2586
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08002587const struct inode_operations ocfs2_file_iops = {
Mark Fashehccd979b2005-12-15 14:31:24 -08002588 .setattr = ocfs2_setattr,
2589 .getattr = ocfs2_getattr,
Tiger Yangd38eb8d2006-11-27 09:59:21 +08002590 .permission = ocfs2_permission,
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002591 .setxattr = generic_setxattr,
2592 .getxattr = generic_getxattr,
2593 .listxattr = ocfs2_listxattr,
2594 .removexattr = generic_removexattr,
Mark Fasheh00dc4172008-10-03 17:32:11 -04002595 .fiemap = ocfs2_fiemap,
Mark Fashehccd979b2005-12-15 14:31:24 -08002596};
2597
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08002598const struct inode_operations ocfs2_special_file_iops = {
Mark Fashehccd979b2005-12-15 14:31:24 -08002599 .setattr = ocfs2_setattr,
2600 .getattr = ocfs2_getattr,
Tiger Yangd38eb8d2006-11-27 09:59:21 +08002601 .permission = ocfs2_permission,
Mark Fashehccd979b2005-12-15 14:31:24 -08002602};
2603
Mark Fasheh53da4932008-07-21 14:29:16 -07002604/*
2605 * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with
2606 * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks!
2607 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -08002608const struct file_operations ocfs2_fops = {
Jan Kara32c3c0e2007-12-19 15:24:52 +01002609 .llseek = generic_file_llseek,
Mark Fashehccd979b2005-12-15 14:31:24 -08002610 .read = do_sync_read,
2611 .write = do_sync_write,
Mark Fashehccd979b2005-12-15 14:31:24 -08002612 .mmap = ocfs2_mmap,
2613 .fsync = ocfs2_sync_file,
2614 .release = ocfs2_file_release,
2615 .open = ocfs2_file_open,
2616 .aio_read = ocfs2_file_aio_read,
2617 .aio_write = ocfs2_file_aio_write,
Andi Kleenc9ec1482008-01-27 03:17:17 +01002618 .unlocked_ioctl = ocfs2_ioctl,
Mark Fasheh586d2322007-03-09 15:56:28 -08002619#ifdef CONFIG_COMPAT
2620 .compat_ioctl = ocfs2_compat_ioctl,
2621#endif
Mark Fasheh53da4932008-07-21 14:29:16 -07002622 .lock = ocfs2_lock,
2623 .flock = ocfs2_flock,
2624 .splice_read = ocfs2_file_splice_read,
2625 .splice_write = ocfs2_file_splice_write,
Christoph Hellwig2fe17c12011-01-14 13:07:43 +01002626 .fallocate = ocfs2_fallocate,
Mark Fasheh53da4932008-07-21 14:29:16 -07002627};
2628
2629const struct file_operations ocfs2_dops = {
2630 .llseek = generic_file_llseek,
2631 .read = generic_read_dir,
2632 .readdir = ocfs2_readdir,
2633 .fsync = ocfs2_sync_file,
2634 .release = ocfs2_dir_release,
2635 .open = ocfs2_dir_open,
2636 .unlocked_ioctl = ocfs2_ioctl,
2637#ifdef CONFIG_COMPAT
2638 .compat_ioctl = ocfs2_compat_ioctl,
2639#endif
2640 .lock = ocfs2_lock,
2641 .flock = ocfs2_flock,
2642};
2643
2644/*
2645 * POSIX-lockless variants of our file_operations.
2646 *
2647 * These will be used if the underlying cluster stack does not support
2648 * posix file locking, if the user passes the "localflocks" mount
2649 * option, or if we have a local-only fs.
2650 *
2651 * ocfs2_flock is in here because all stacks handle UNIX file locks,
2652 * so we still want it in the case of no stack support for
2653 * plocks. Internally, it will do the right thing when asked to ignore
2654 * the cluster.
2655 */
2656const struct file_operations ocfs2_fops_no_plocks = {
2657 .llseek = generic_file_llseek,
2658 .read = do_sync_read,
2659 .write = do_sync_write,
2660 .mmap = ocfs2_mmap,
2661 .fsync = ocfs2_sync_file,
2662 .release = ocfs2_file_release,
2663 .open = ocfs2_file_open,
2664 .aio_read = ocfs2_file_aio_read,
2665 .aio_write = ocfs2_file_aio_write,
2666 .unlocked_ioctl = ocfs2_ioctl,
2667#ifdef CONFIG_COMPAT
2668 .compat_ioctl = ocfs2_compat_ioctl,
2669#endif
Mark Fasheh53fc6222007-12-20 16:49:04 -08002670 .flock = ocfs2_flock,
Tiger Yang8659ac22006-10-17 18:29:52 -07002671 .splice_read = ocfs2_file_splice_read,
2672 .splice_write = ocfs2_file_splice_write,
Tristan Ye3d1c1822011-05-23 15:57:26 +08002673 .fallocate = ocfs2_fallocate,
Mark Fashehccd979b2005-12-15 14:31:24 -08002674};
2675
Mark Fasheh53da4932008-07-21 14:29:16 -07002676const struct file_operations ocfs2_dops_no_plocks = {
Jan Kara32c3c0e2007-12-19 15:24:52 +01002677 .llseek = generic_file_llseek,
Mark Fashehccd979b2005-12-15 14:31:24 -08002678 .read = generic_read_dir,
2679 .readdir = ocfs2_readdir,
2680 .fsync = ocfs2_sync_file,
Mark Fasheh53fc6222007-12-20 16:49:04 -08002681 .release = ocfs2_dir_release,
2682 .open = ocfs2_dir_open,
Andi Kleenc9ec1482008-01-27 03:17:17 +01002683 .unlocked_ioctl = ocfs2_ioctl,
Mark Fasheh586d2322007-03-09 15:56:28 -08002684#ifdef CONFIG_COMPAT
2685 .compat_ioctl = ocfs2_compat_ioctl,
2686#endif
Mark Fasheh53fc6222007-12-20 16:49:04 -08002687 .flock = ocfs2_flock,
Mark Fashehccd979b2005-12-15 14:31:24 -08002688};