blob: bfeb647459d95e6425edd63c3179b848e027c848 [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>
Tejun Heo66114ca2015-05-22 17:13:32 -040040#include <linux/backing-dev.h>
Mark Fashehccd979b2005-12-15 14:31:24 -080041
Mark Fashehccd979b2005-12-15 14:31:24 -080042#include <cluster/masklog.h>
43
44#include "ocfs2.h"
45
46#include "alloc.h"
47#include "aops.h"
48#include "dir.h"
49#include "dlmglue.h"
50#include "extent_map.h"
51#include "file.h"
52#include "sysfile.h"
53#include "inode.h"
Herbert Poetzlca4d1472006-07-03 17:27:12 -070054#include "ioctl.h"
Mark Fashehccd979b2005-12-15 14:31:24 -080055#include "journal.h"
Mark Fasheh53fc6222007-12-20 16:49:04 -080056#include "locks.h"
Mark Fashehccd979b2005-12-15 14:31:24 -080057#include "mmap.h"
58#include "suballoc.h"
59#include "super.h"
Tiger Yangcf1d6c72008-08-18 17:11:00 +080060#include "xattr.h"
Tiger Yang23fc2702008-11-14 11:17:18 +080061#include "acl.h"
Jan Karaa90714c2008-10-09 19:38:40 +020062#include "quota.h"
Tao Ma293b2f72009-08-25 08:02:48 +080063#include "refcounttree.h"
Tao Ma468eedd2011-02-22 22:14:41 +080064#include "ocfs2_trace.h"
Mark Fashehccd979b2005-12-15 14:31:24 -080065
66#include "buffer_head_io.h"
67
Mark Fasheh53fc6222007-12-20 16:49:04 -080068static int ocfs2_init_file_private(struct inode *inode, struct file *file)
69{
70 struct ocfs2_file_private *fp;
71
72 fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL);
73 if (!fp)
74 return -ENOMEM;
75
76 fp->fp_file = file;
77 mutex_init(&fp->fp_mutex);
78 ocfs2_file_lock_res_init(&fp->fp_flock, fp);
79 file->private_data = fp;
80
81 return 0;
82}
83
84static void ocfs2_free_file_private(struct inode *inode, struct file *file)
85{
86 struct ocfs2_file_private *fp = file->private_data;
87 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
88
89 if (fp) {
90 ocfs2_simple_drop_lockres(osb, &fp->fp_flock);
91 ocfs2_lock_res_free(&fp->fp_flock);
92 kfree(fp);
93 file->private_data = NULL;
94 }
95}
96
Mark Fashehccd979b2005-12-15 14:31:24 -080097static int ocfs2_file_open(struct inode *inode, struct file *file)
98{
99 int status;
100 int mode = file->f_flags;
101 struct ocfs2_inode_info *oi = OCFS2_I(inode);
102
Tao Ma468eedd2011-02-22 22:14:41 +0800103 trace_ocfs2_file_open(inode, file, file->f_path.dentry,
104 (unsigned long long)OCFS2_I(inode)->ip_blkno,
105 file->f_path.dentry->d_name.len,
106 file->f_path.dentry->d_name.name, mode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800107
Jan Kara9c89fe02015-07-14 13:36:02 +0200108 if (file->f_mode & FMODE_WRITE) {
109 status = dquot_initialize(inode);
110 if (status)
111 goto leave;
112 }
Christoph Hellwig907f4552010-03-03 09:05:06 -0500113
Mark Fashehccd979b2005-12-15 14:31:24 -0800114 spin_lock(&oi->ip_lock);
115
116 /* Check that the inode hasn't been wiped from disk by another
117 * node. If it hasn't then we're safe as long as we hold the
118 * spin lock until our increment of open count. */
119 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
120 spin_unlock(&oi->ip_lock);
121
122 status = -ENOENT;
123 goto leave;
124 }
125
126 if (mode & O_DIRECT)
127 oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT;
128
129 oi->ip_open_count++;
130 spin_unlock(&oi->ip_lock);
Mark Fasheh53fc6222007-12-20 16:49:04 -0800131
132 status = ocfs2_init_file_private(inode, file);
133 if (status) {
134 /*
135 * We want to set open count back if we're failing the
136 * open.
137 */
138 spin_lock(&oi->ip_lock);
139 oi->ip_open_count--;
140 spin_unlock(&oi->ip_lock);
141 }
142
Mark Fashehccd979b2005-12-15 14:31:24 -0800143leave:
Mark Fashehccd979b2005-12-15 14:31:24 -0800144 return status;
145}
146
147static int ocfs2_file_release(struct inode *inode, struct file *file)
148{
149 struct ocfs2_inode_info *oi = OCFS2_I(inode);
150
Mark Fashehccd979b2005-12-15 14:31:24 -0800151 spin_lock(&oi->ip_lock);
152 if (!--oi->ip_open_count)
153 oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT;
Tao Ma468eedd2011-02-22 22:14:41 +0800154
155 trace_ocfs2_file_release(inode, file, file->f_path.dentry,
156 oi->ip_blkno,
157 file->f_path.dentry->d_name.len,
158 file->f_path.dentry->d_name.name,
159 oi->ip_open_count);
Mark Fashehccd979b2005-12-15 14:31:24 -0800160 spin_unlock(&oi->ip_lock);
161
Mark Fasheh53fc6222007-12-20 16:49:04 -0800162 ocfs2_free_file_private(inode, file);
163
Mark Fashehccd979b2005-12-15 14:31:24 -0800164 return 0;
165}
166
Mark Fasheh53fc6222007-12-20 16:49:04 -0800167static int ocfs2_dir_open(struct inode *inode, struct file *file)
168{
169 return ocfs2_init_file_private(inode, file);
170}
171
172static int ocfs2_dir_release(struct inode *inode, struct file *file)
173{
174 ocfs2_free_file_private(inode, file);
175 return 0;
176}
177
Josef Bacik02c24a82011-07-16 20:44:56 -0400178static int ocfs2_sync_file(struct file *file, loff_t start, loff_t end,
179 int datasync)
Mark Fashehccd979b2005-12-15 14:31:24 -0800180{
181 int err = 0;
Christoph Hellwig7ea80852010-05-26 17:53:25 +0200182 struct inode *inode = file->f_mapping->host;
Mark Fashehccd979b2005-12-15 14:31:24 -0800183 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Darrick J. Wong2931cdc2014-04-03 14:46:48 -0700184 struct ocfs2_inode_info *oi = OCFS2_I(inode);
185 journal_t *journal = osb->journal->j_journal;
186 int ret;
187 tid_t commit_tid;
188 bool needs_barrier = false;
Mark Fashehccd979b2005-12-15 14:31:24 -0800189
Tao Ma468eedd2011-02-22 22:14:41 +0800190 trace_ocfs2_sync_file(inode, file, file->f_path.dentry,
191 OCFS2_I(inode)->ip_blkno,
192 file->f_path.dentry->d_name.len,
193 file->f_path.dentry->d_name.name,
194 (unsigned long long)datasync);
Mark Fashehccd979b2005-12-15 14:31:24 -0800195
Younger Liua987c7c2014-02-10 14:25:44 -0800196 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
197 return -EROFS;
198
Josef Bacik02c24a82011-07-16 20:44:56 -0400199 err = filemap_write_and_wait_range(inode->i_mapping, start, end);
200 if (err)
201 return err;
202
Darrick J. Wong2931cdc2014-04-03 14:46:48 -0700203 commit_tid = datasync ? oi->i_datasync_tid : oi->i_sync_tid;
204 if (journal->j_flags & JBD2_BARRIER &&
205 !jbd2_trans_will_send_data_barrier(journal, commit_tid))
206 needs_barrier = true;
207 err = jbd2_complete_transaction(journal, commit_tid);
208 if (needs_barrier) {
209 ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
210 if (!err)
211 err = ret;
Jan Kara04eda1a2010-08-05 20:32:45 +0200212 }
Hisashi Hifumie04cc152009-06-09 16:47:45 +0900213
Tao Mac1e8d352011-03-07 16:43:21 +0800214 if (err)
215 mlog_errno(err);
Mark Fashehccd979b2005-12-15 14:31:24 -0800216
217 return (err < 0) ? -EIO : 0;
218}
219
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800220int ocfs2_should_update_atime(struct inode *inode,
221 struct vfsmount *vfsmnt)
222{
223 struct timespec now;
224 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
225
226 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
227 return 0;
228
229 if ((inode->i_flags & S_NOATIME) ||
230 ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
231 return 0;
232
Mark Fasheh6c2aad02006-12-19 15:25:52 -0800233 /*
234 * We can be called with no vfsmnt structure - NFSD will
235 * sometimes do this.
236 *
237 * Note that our action here is different than touch_atime() -
238 * if we can't tell whether this is a noatime mount, then we
239 * don't know whether to trust the value of s_atime_quantum.
240 */
241 if (vfsmnt == NULL)
242 return 0;
243
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800244 if ((vfsmnt->mnt_flags & MNT_NOATIME) ||
245 ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
246 return 0;
247
Mark Fasheh7e913c52006-12-13 00:34:35 -0800248 if (vfsmnt->mnt_flags & MNT_RELATIME) {
249 if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) ||
250 (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0))
251 return 1;
252
253 return 0;
254 }
255
Deepa Dinamani078cd822016-09-14 07:48:04 -0700256 now = current_time(inode);
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800257 if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum))
258 return 0;
259 else
260 return 1;
261}
262
263int ocfs2_update_inode_atime(struct inode *inode,
264 struct buffer_head *bh)
265{
266 int ret;
267 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
268 handle_t *handle;
Mark Fashehc11e9fa2007-07-20 11:24:53 -0700269 struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data;
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800270
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800271 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
Jan Karafa38e922008-10-20 19:23:51 +0200272 if (IS_ERR(handle)) {
273 ret = PTR_ERR(handle);
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800274 mlog_errno(ret);
275 goto out;
276 }
277
Joel Becker0cf2f762009-02-12 16:41:25 -0800278 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
Joel Becker13723d02008-10-17 19:25:01 -0700279 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehc11e9fa2007-07-20 11:24:53 -0700280 if (ret) {
281 mlog_errno(ret);
282 goto out_commit;
283 }
284
285 /*
286 * Don't use ocfs2_mark_inode_dirty() here as we don't always
287 * have i_mutex to guard against concurrent changes to other
288 * inode fields.
289 */
Deepa Dinamani078cd822016-09-14 07:48:04 -0700290 inode->i_atime = current_time(inode);
Mark Fashehc11e9fa2007-07-20 11:24:53 -0700291 di->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
292 di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
Darrick J. Wong6fdb7022014-04-03 14:47:08 -0700293 ocfs2_update_inode_fsync_trans(handle, inode, 0);
Joel Beckerec20cec2010-03-19 14:13:52 -0700294 ocfs2_journal_dirty(handle, bh);
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800295
Mark Fashehc11e9fa2007-07-20 11:24:53 -0700296out_commit:
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800297 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
298out:
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800299 return ret;
300}
301
Joseph Qi026749a2015-02-16 15:59:50 -0800302int ocfs2_set_inode_size(handle_t *handle,
Adrian Bunk6cb129f2007-04-26 00:29:35 -0700303 struct inode *inode,
304 struct buffer_head *fe_bh,
305 u64 new_i_size)
Mark Fashehccd979b2005-12-15 14:31:24 -0800306{
307 int status;
308
Mark Fashehccd979b2005-12-15 14:31:24 -0800309 i_size_write(inode, new_i_size);
Mark Fasheh8110b072007-03-22 16:53:23 -0700310 inode->i_blocks = ocfs2_inode_sector_count(inode);
Deepa Dinamani078cd822016-09-14 07:48:04 -0700311 inode->i_ctime = inode->i_mtime = current_time(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800312
313 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
314 if (status < 0) {
315 mlog_errno(status);
316 goto bail;
317 }
318
319bail:
Mark Fashehccd979b2005-12-15 14:31:24 -0800320 return status;
321}
322
Jan Kara9e33d692008-08-25 19:56:50 +0200323int ocfs2_simple_size_update(struct inode *inode,
324 struct buffer_head *di_bh,
325 u64 new_i_size)
Mark Fashehccd979b2005-12-15 14:31:24 -0800326{
327 int ret;
328 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Mark Fasheh1fabe142006-10-09 18:11:45 -0700329 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800330
Mark Fasheh65eff9c2006-10-09 17:26:22 -0700331 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
Jan Karafa38e922008-10-20 19:23:51 +0200332 if (IS_ERR(handle)) {
333 ret = PTR_ERR(handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800334 mlog_errno(ret);
335 goto out;
336 }
337
338 ret = ocfs2_set_inode_size(handle, inode, di_bh,
339 new_i_size);
340 if (ret < 0)
341 mlog_errno(ret);
342
Darrick J. Wong6fdb7022014-04-03 14:47:08 -0700343 ocfs2_update_inode_fsync_trans(handle, inode, 0);
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700344 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800345out:
346 return ret;
347}
348
Tao Ma37f8a2b2009-08-26 09:47:28 +0800349static int ocfs2_cow_file_pos(struct inode *inode,
350 struct buffer_head *fe_bh,
351 u64 offset)
352{
353 int status;
354 u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
355 unsigned int num_clusters = 0;
356 unsigned int ext_flags = 0;
357
358 /*
359 * If the new offset is aligned to the range of the cluster, there is
360 * no space for ocfs2_zero_range_for_truncate to fill, so no need to
361 * CoW either.
362 */
363 if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0)
364 return 0;
365
366 status = ocfs2_get_clusters(inode, cpos, &phys,
367 &num_clusters, &ext_flags);
368 if (status) {
369 mlog_errno(status);
370 goto out;
371 }
372
373 if (!(ext_flags & OCFS2_EXT_REFCOUNTED))
374 goto out;
375
Tiger Yangc7dd3392013-08-13 16:00:58 -0700376 return ocfs2_refcount_cow(inode, fe_bh, cpos, 1, cpos+1);
Tao Ma37f8a2b2009-08-26 09:47:28 +0800377
378out:
379 return status;
380}
381
Mark Fashehccd979b2005-12-15 14:31:24 -0800382static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb,
383 struct inode *inode,
384 struct buffer_head *fe_bh,
385 u64 new_i_size)
386{
387 int status;
Mark Fasheh1fabe142006-10-09 18:11:45 -0700388 handle_t *handle;
Mark Fasheh60b11392007-02-16 11:46:50 -0800389 struct ocfs2_dinode *di;
Mark Fasheh35edec12007-07-06 14:41:18 -0700390 u64 cluster_bytes;
Mark Fashehccd979b2005-12-15 14:31:24 -0800391
Tao Ma37f8a2b2009-08-26 09:47:28 +0800392 /*
393 * We need to CoW the cluster contains the offset if it is reflinked
394 * since we will call ocfs2_zero_range_for_truncate later which will
395 * write "0" from offset to the end of the cluster.
396 */
397 status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size);
398 if (status) {
399 mlog_errno(status);
400 return status;
401 }
402
Mark Fashehccd979b2005-12-15 14:31:24 -0800403 /* TODO: This needs to actually orphan the inode in this
404 * transaction. */
405
Mark Fasheh65eff9c2006-10-09 17:26:22 -0700406 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
Mark Fashehccd979b2005-12-15 14:31:24 -0800407 if (IS_ERR(handle)) {
408 status = PTR_ERR(handle);
409 mlog_errno(status);
410 goto out;
411 }
412
Joel Becker0cf2f762009-02-12 16:41:25 -0800413 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
Joel Becker13723d02008-10-17 19:25:01 -0700414 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fasheh60b11392007-02-16 11:46:50 -0800415 if (status < 0) {
416 mlog_errno(status);
417 goto out_commit;
418 }
419
420 /*
421 * Do this before setting i_size.
422 */
Mark Fasheh35edec12007-07-06 14:41:18 -0700423 cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
424 status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size,
425 cluster_bytes);
Mark Fasheh60b11392007-02-16 11:46:50 -0800426 if (status) {
427 mlog_errno(status);
428 goto out_commit;
429 }
430
431 i_size_write(inode, new_i_size);
Deepa Dinamani078cd822016-09-14 07:48:04 -0700432 inode->i_ctime = inode->i_mtime = current_time(inode);
Mark Fasheh60b11392007-02-16 11:46:50 -0800433
434 di = (struct ocfs2_dinode *) fe_bh->b_data;
435 di->i_size = cpu_to_le64(new_i_size);
436 di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec);
437 di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
Darrick J. Wong6fdb7022014-04-03 14:47:08 -0700438 ocfs2_update_inode_fsync_trans(handle, inode, 0);
Mark Fasheh60b11392007-02-16 11:46:50 -0800439
Joel Beckerec20cec2010-03-19 14:13:52 -0700440 ocfs2_journal_dirty(handle, fe_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800441
Mark Fasheh60b11392007-02-16 11:46:50 -0800442out_commit:
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700443 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800444out:
Mark Fashehccd979b2005-12-15 14:31:24 -0800445 return status;
446}
447
Joseph Qi026749a2015-02-16 15:59:50 -0800448int ocfs2_truncate_file(struct inode *inode,
Mark Fashehccd979b2005-12-15 14:31:24 -0800449 struct buffer_head *di_bh,
450 u64 new_i_size)
451{
452 int status = 0;
453 struct ocfs2_dinode *fe = NULL;
454 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Mark Fashehccd979b2005-12-15 14:31:24 -0800455
Joel Beckerb657c952008-11-13 14:49:11 -0800456 /* We trust di_bh because it comes from ocfs2_inode_lock(), which
457 * already validated it */
Mark Fashehccd979b2005-12-15 14:31:24 -0800458 fe = (struct ocfs2_dinode *) di_bh->b_data;
Mark Fashehccd979b2005-12-15 14:31:24 -0800459
Tao Ma468eedd2011-02-22 22:14:41 +0800460 trace_ocfs2_truncate_file((unsigned long long)OCFS2_I(inode)->ip_blkno,
461 (unsigned long long)le64_to_cpu(fe->i_size),
462 (unsigned long long)new_i_size);
463
Mark Fashehccd979b2005-12-15 14:31:24 -0800464 mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode),
Mark Fashehb06970532006-03-03 10:24:33 -0800465 "Inode %llu, inode i_size = %lld != di "
466 "i_size = %llu, i_flags = 0x%x\n",
467 (unsigned long long)OCFS2_I(inode)->ip_blkno,
Mark Fashehccd979b2005-12-15 14:31:24 -0800468 i_size_read(inode),
Mark Fashehb06970532006-03-03 10:24:33 -0800469 (unsigned long long)le64_to_cpu(fe->i_size),
470 le32_to_cpu(fe->i_flags));
Mark Fashehccd979b2005-12-15 14:31:24 -0800471
472 if (new_i_size > le64_to_cpu(fe->i_size)) {
Tao Ma468eedd2011-02-22 22:14:41 +0800473 trace_ocfs2_truncate_file_error(
474 (unsigned long long)le64_to_cpu(fe->i_size),
475 (unsigned long long)new_i_size);
Mark Fashehccd979b2005-12-15 14:31:24 -0800476 status = -EINVAL;
477 mlog_errno(status);
478 goto bail;
479 }
480
Mark Fasheh2e89b2e2007-05-09 13:40:18 -0700481 down_write(&OCFS2_I(inode)->ip_alloc_sem);
482
Mark Fasheh4fe370a2009-12-07 13:15:40 -0800483 ocfs2_resv_discard(&osb->osb_la_resmap,
484 &OCFS2_I(inode)->ip_la_data_resv);
485
Mark Fashehc934a922007-10-18 15:23:46 -0700486 /*
487 * The inode lock forced other nodes to sync and drop their
488 * pages, which (correctly) happens even if we have a truncate
489 * without allocation change - ocfs2 cluster sizes can be much
490 * greater than page size, so we have to truncate them
491 * anyway.
492 */
Mark Fasheh2e89b2e2007-05-09 13:40:18 -0700493 unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
494 truncate_inode_pages(inode->i_mapping, new_i_size);
495
Mark Fasheh1afc32b2007-09-07 14:46:51 -0700496 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
497 status = ocfs2_truncate_inline(inode, di_bh, new_i_size,
Mark Fashehb1967d02007-11-20 11:56:39 -0800498 i_size_read(inode), 1);
Mark Fasheh1afc32b2007-09-07 14:46:51 -0700499 if (status)
500 mlog_errno(status);
501
Mark Fashehc934a922007-10-18 15:23:46 -0700502 goto bail_unlock_sem;
Mark Fasheh1afc32b2007-09-07 14:46:51 -0700503 }
504
Mark Fashehccd979b2005-12-15 14:31:24 -0800505 /* alright, we're going to need to do a full blown alloc size
506 * change. Orphan the inode so that recovery can complete the
507 * truncate if necessary. This does the task of marking
508 * i_size. */
509 status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size);
510 if (status < 0) {
511 mlog_errno(status);
Mark Fashehc934a922007-10-18 15:23:46 -0700512 goto bail_unlock_sem;
Mark Fashehccd979b2005-12-15 14:31:24 -0800513 }
514
Tristan Ye78f94672010-05-11 17:54:42 +0800515 status = ocfs2_commit_truncate(osb, inode, di_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800516 if (status < 0) {
517 mlog_errno(status);
Mark Fashehc934a922007-10-18 15:23:46 -0700518 goto bail_unlock_sem;
Mark Fashehccd979b2005-12-15 14:31:24 -0800519 }
520
521 /* TODO: orphan dir cleanup here. */
Mark Fashehc934a922007-10-18 15:23:46 -0700522bail_unlock_sem:
Mark Fasheh2e89b2e2007-05-09 13:40:18 -0700523 up_write(&OCFS2_I(inode)->ip_alloc_sem);
524
Mark Fashehccd979b2005-12-15 14:31:24 -0800525bail:
Tao Ma8b2c0db2009-08-18 11:43:49 +0800526 if (!status && OCFS2_I(inode)->ip_clusters == 0)
527 status = ocfs2_try_remove_refcount_tree(inode, di_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800528
Mark Fashehccd979b2005-12-15 14:31:24 -0800529 return status;
530}
531
532/*
Tao Ma0eb8d472008-08-18 17:38:45 +0800533 * extend file allocation only here.
Mark Fashehccd979b2005-12-15 14:31:24 -0800534 * we'll update all the disk stuff, and oip->alloc_size
535 *
536 * expect stuff to be locked, a transaction started and enough data /
537 * metadata reservations in the contexts.
538 *
539 * Will return -EAGAIN, and a reason if a restart is needed.
540 * If passed in, *reason will always be set, even in error.
541 */
Tao Ma0eb8d472008-08-18 17:38:45 +0800542int ocfs2_add_inode_data(struct ocfs2_super *osb,
543 struct inode *inode,
544 u32 *logical_offset,
545 u32 clusters_to_add,
546 int mark_unwritten,
547 struct buffer_head *fe_bh,
548 handle_t *handle,
549 struct ocfs2_alloc_context *data_ac,
550 struct ocfs2_alloc_context *meta_ac,
551 enum ocfs2_alloc_restarted *reason_ret)
Mark Fashehccd979b2005-12-15 14:31:24 -0800552{
Joel Beckerf99b9b72008-08-20 19:36:33 -0700553 int ret;
554 struct ocfs2_extent_tree et;
Mark Fashehccd979b2005-12-15 14:31:24 -0800555
Joel Becker5e404e92009-02-13 03:54:22 -0800556 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh);
Joel Beckercbee7e12009-02-13 03:34:15 -0800557 ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset,
558 clusters_to_add, mark_unwritten,
559 data_ac, meta_ac, reason_ret);
Joel Beckerf99b9b72008-08-20 19:36:33 -0700560
561 return ret;
Mark Fashehccd979b2005-12-15 14:31:24 -0800562}
563
Mark Fasheh2ae99a62007-03-09 16:43:28 -0800564static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
565 u32 clusters_to_add, int mark_unwritten)
Mark Fashehccd979b2005-12-15 14:31:24 -0800566{
567 int status = 0;
568 int restart_func = 0;
Mark Fashehabf8b152007-01-17 13:07:24 -0800569 int credits;
Mark Fasheh2ae99a62007-03-09 16:43:28 -0800570 u32 prev_clusters;
Mark Fashehccd979b2005-12-15 14:31:24 -0800571 struct buffer_head *bh = NULL;
572 struct ocfs2_dinode *fe = NULL;
Mark Fasheh1fabe142006-10-09 18:11:45 -0700573 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800574 struct ocfs2_alloc_context *data_ac = NULL;
575 struct ocfs2_alloc_context *meta_ac = NULL;
Junxiao Bi696cdf72015-02-10 14:08:46 -0800576 enum ocfs2_alloc_restarted why = RESTART_NONE;
Mark Fashehccd979b2005-12-15 14:31:24 -0800577 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Joel Beckerf99b9b72008-08-20 19:36:33 -0700578 struct ocfs2_extent_tree et;
Jan Karaa90714c2008-10-09 19:38:40 +0200579 int did_quota = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -0800580
Mark Fashehdcd05382007-01-16 11:32:23 -0800581 /*
Junxiao Bif0cb0f02013-11-12 15:06:53 -0800582 * Unwritten extent only exists for file systems which
Mark Fashehdcd05382007-01-16 11:32:23 -0800583 * support holes.
584 */
Mark Fasheh2ae99a62007-03-09 16:43:28 -0800585 BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb));
Mark Fashehdcd05382007-01-16 11:32:23 -0800586
Joel Beckerb657c952008-11-13 14:49:11 -0800587 status = ocfs2_read_inode_block(inode, &bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800588 if (status < 0) {
589 mlog_errno(status);
590 goto leave;
591 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800592 fe = (struct ocfs2_dinode *) bh->b_data;
Mark Fashehccd979b2005-12-15 14:31:24 -0800593
594restart_all:
595 BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters);
596
Joel Becker5e404e92009-02-13 03:54:22 -0800597 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh);
Joel Beckerf99b9b72008-08-20 19:36:33 -0700598 status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
599 &data_ac, &meta_ac);
Mark Fasheh9517bac2007-02-09 20:24:12 -0800600 if (status) {
601 mlog_errno(status);
602 goto leave;
603 }
604
Goldwyn Rodrigues06f9da62013-11-12 15:06:52 -0800605 credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list);
Mark Fasheh65eff9c2006-10-09 17:26:22 -0700606 handle = ocfs2_start_trans(osb, credits);
Mark Fashehccd979b2005-12-15 14:31:24 -0800607 if (IS_ERR(handle)) {
608 status = PTR_ERR(handle);
609 handle = NULL;
610 mlog_errno(status);
611 goto leave;
612 }
613
614restarted_transaction:
Tao Ma468eedd2011-02-22 22:14:41 +0800615 trace_ocfs2_extend_allocation(
616 (unsigned long long)OCFS2_I(inode)->ip_blkno,
617 (unsigned long long)i_size_read(inode),
618 le32_to_cpu(fe->i_clusters), clusters_to_add,
619 why, restart_func);
620
Christoph Hellwig5dd40562010-03-03 09:05:00 -0500621 status = dquot_alloc_space_nodirty(inode,
622 ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
623 if (status)
Jan Karaa90714c2008-10-09 19:38:40 +0200624 goto leave;
Jan Karaa90714c2008-10-09 19:38:40 +0200625 did_quota = 1;
626
Mark Fashehccd979b2005-12-15 14:31:24 -0800627 /* reserve a write to the file entry early on - that we if we
628 * run out of credits in the allocation path, we can still
629 * update i_size. */
Joel Becker0cf2f762009-02-12 16:41:25 -0800630 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
Joel Becker13723d02008-10-17 19:25:01 -0700631 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -0800632 if (status < 0) {
633 mlog_errno(status);
634 goto leave;
635 }
636
637 prev_clusters = OCFS2_I(inode)->ip_clusters;
638
Tao Ma0eb8d472008-08-18 17:38:45 +0800639 status = ocfs2_add_inode_data(osb,
640 inode,
641 &logical_start,
642 clusters_to_add,
643 mark_unwritten,
644 bh,
645 handle,
646 data_ac,
647 meta_ac,
648 &why);
Mark Fashehccd979b2005-12-15 14:31:24 -0800649 if ((status < 0) && (status != -EAGAIN)) {
650 if (status != -ENOSPC)
651 mlog_errno(status);
652 goto leave;
653 }
Darrick J. Wong2931cdc2014-04-03 14:46:48 -0700654 ocfs2_update_inode_fsync_trans(handle, inode, 1);
Joel Beckerec20cec2010-03-19 14:13:52 -0700655 ocfs2_journal_dirty(handle, bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800656
657 spin_lock(&OCFS2_I(inode)->ip_lock);
658 clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters);
659 spin_unlock(&OCFS2_I(inode)->ip_lock);
Jan Karaa90714c2008-10-09 19:38:40 +0200660 /* Release unused quota reservation */
Christoph Hellwig5dd40562010-03-03 09:05:00 -0500661 dquot_free_space(inode,
Jan Karaa90714c2008-10-09 19:38:40 +0200662 ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
663 did_quota = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -0800664
665 if (why != RESTART_NONE && clusters_to_add) {
666 if (why == RESTART_META) {
Mark Fashehccd979b2005-12-15 14:31:24 -0800667 restart_func = 1;
Tao Ma79681842010-04-16 13:59:25 +0800668 status = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -0800669 } else {
670 BUG_ON(why != RESTART_TRANS);
671
Younger Liu2b1e55c2013-09-11 14:19:44 -0700672 status = ocfs2_allocate_extend_trans(handle, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -0800673 if (status < 0) {
674 /* handle still has to be committed at
675 * this point. */
676 status = -ENOMEM;
677 mlog_errno(status);
678 goto leave;
679 }
680 goto restarted_transaction;
681 }
682 }
683
Tao Ma468eedd2011-02-22 22:14:41 +0800684 trace_ocfs2_extend_allocation_end(OCFS2_I(inode)->ip_blkno,
Mark Fasheh1ca1a112007-04-27 16:01:25 -0700685 le32_to_cpu(fe->i_clusters),
Tao Ma468eedd2011-02-22 22:14:41 +0800686 (unsigned long long)le64_to_cpu(fe->i_size),
687 OCFS2_I(inode)->ip_clusters,
688 (unsigned long long)i_size_read(inode));
Mark Fashehccd979b2005-12-15 14:31:24 -0800689
690leave:
Jan Karaa90714c2008-10-09 19:38:40 +0200691 if (status < 0 && did_quota)
Christoph Hellwig5dd40562010-03-03 09:05:00 -0500692 dquot_free_space(inode,
Jan Karaa90714c2008-10-09 19:38:40 +0200693 ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
Mark Fashehccd979b2005-12-15 14:31:24 -0800694 if (handle) {
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700695 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800696 handle = NULL;
697 }
698 if (data_ac) {
699 ocfs2_free_alloc_context(data_ac);
700 data_ac = NULL;
701 }
702 if (meta_ac) {
703 ocfs2_free_alloc_context(meta_ac);
704 meta_ac = NULL;
705 }
706 if ((!status) && restart_func) {
707 restart_func = 0;
708 goto restart_all;
709 }
Mark Fasheha81cb882008-10-07 14:25:16 -0700710 brelse(bh);
711 bh = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800712
Mark Fashehccd979b2005-12-15 14:31:24 -0800713 return status;
714}
715
Joseph Qi026749a2015-02-16 15:59:50 -0800716int ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
717 u32 clusters_to_add, int mark_unwritten)
718{
719 return __ocfs2_extend_allocation(inode, logical_start,
720 clusters_to_add, mark_unwritten);
721}
722
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700723/*
724 * While a write will already be ordering the data, a truncate will not.
725 * Thus, we need to explicitly order the zeroed pages.
726 */
Junxiao Bic7d2cbc2014-02-10 14:25:53 -0800727static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode,
728 struct buffer_head *di_bh)
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700729{
730 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
731 handle_t *handle = NULL;
732 int ret = 0;
733
734 if (!ocfs2_should_order_data(inode))
735 goto out;
736
737 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
738 if (IS_ERR(handle)) {
739 ret = -ENOMEM;
740 mlog_errno(ret);
741 goto out;
742 }
743
744 ret = ocfs2_jbd2_file_inode(handle, inode);
Junxiao Bic7d2cbc2014-02-10 14:25:53 -0800745 if (ret < 0) {
746 mlog_errno(ret);
747 goto out;
748 }
749
750 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
751 OCFS2_JOURNAL_ACCESS_WRITE);
752 if (ret)
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700753 mlog_errno(ret);
Darrick J. Wong6fdb7022014-04-03 14:47:08 -0700754 ocfs2_update_inode_fsync_trans(handle, inode, 1);
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700755
756out:
757 if (ret) {
758 if (!IS_ERR(handle))
759 ocfs2_commit_trans(osb, handle);
760 handle = ERR_PTR(ret);
761 }
762 return handle;
763}
764
Mark Fashehccd979b2005-12-15 14:31:24 -0800765/* Some parts of this taken from generic_cont_expand, which turned out
766 * to be too fragile to do exactly what we need without us having to
Nick Piggin4e02ed42008-10-29 14:00:55 -0700767 * worry about recursive locking in ->write_begin() and ->write_end(). */
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700768static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from,
Junxiao Bic7d2cbc2014-02-10 14:25:53 -0800769 u64 abs_to, struct buffer_head *di_bh)
Mark Fashehccd979b2005-12-15 14:31:24 -0800770{
771 struct address_space *mapping = inode->i_mapping;
772 struct page *page;
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300773 unsigned long index = abs_from >> PAGE_SHIFT;
Junxiao Bif775da22014-10-09 15:25:15 -0700774 handle_t *handle;
Joel Becker54532582010-07-16 13:32:33 -0700775 int ret = 0;
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700776 unsigned zero_from, zero_to, block_start, block_end;
Junxiao Bic7d2cbc2014-02-10 14:25:53 -0800777 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
Mark Fashehccd979b2005-12-15 14:31:24 -0800778
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700779 BUG_ON(abs_from >= abs_to);
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300780 BUG_ON(abs_to > (((u64)index + 1) << PAGE_SHIFT));
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700781 BUG_ON(abs_from & (inode->i_blkbits - 1));
Mark Fashehccd979b2005-12-15 14:31:24 -0800782
Junxiao Bif775da22014-10-09 15:25:15 -0700783 handle = ocfs2_zero_start_ordered_transaction(inode, di_bh);
784 if (IS_ERR(handle)) {
785 ret = PTR_ERR(handle);
786 goto out;
787 }
788
Jan Kara9b4c0ff2010-08-24 14:28:03 +0200789 page = find_or_create_page(mapping, index, GFP_NOFS);
Mark Fashehccd979b2005-12-15 14:31:24 -0800790 if (!page) {
791 ret = -ENOMEM;
792 mlog_errno(ret);
Junxiao Bif775da22014-10-09 15:25:15 -0700793 goto out_commit_trans;
Mark Fashehccd979b2005-12-15 14:31:24 -0800794 }
795
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700796 /* Get the offsets within the page that we want to zero */
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300797 zero_from = abs_from & (PAGE_SIZE - 1);
798 zero_to = abs_to & (PAGE_SIZE - 1);
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700799 if (!zero_to)
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300800 zero_to = PAGE_SIZE;
Mark Fashehccd979b2005-12-15 14:31:24 -0800801
Tao Ma468eedd2011-02-22 22:14:41 +0800802 trace_ocfs2_write_zero_page(
803 (unsigned long long)OCFS2_I(inode)->ip_blkno,
804 (unsigned long long)abs_from,
805 (unsigned long long)abs_to,
806 index, zero_from, zero_to);
Joel Becker56934862010-07-01 15:13:31 -0700807
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700808 /* We know that zero_from is block aligned */
809 for (block_start = zero_from; block_start < zero_to;
810 block_start = block_end) {
Fabian Frederick93407472017-02-27 14:28:32 -0800811 block_end = block_start + i_blocksize(inode);
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700812
813 /*
Christoph Hellwigebdec242010-10-06 10:47:23 +0200814 * block_start is block-aligned. Bump it by one to force
815 * __block_write_begin and block_commit_write to zero the
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700816 * whole block.
817 */
Christoph Hellwigebdec242010-10-06 10:47:23 +0200818 ret = __block_write_begin(page, block_start + 1, 0,
819 ocfs2_get_block);
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700820 if (ret < 0) {
821 mlog_errno(ret);
Mark Fashehccd979b2005-12-15 14:31:24 -0800822 goto out_unlock;
823 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800824
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700825
826 /* must not update i_size! */
827 ret = block_commit_write(page, block_start + 1,
828 block_start + 1);
829 if (ret < 0)
830 mlog_errno(ret);
831 else
832 ret = 0;
833 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800834
Junxiao Bif775da22014-10-09 15:25:15 -0700835 /*
836 * fs-writeback will release the dirty pages without page lock
837 * whose offset are over inode size, the release happens at
838 * block_write_full_page().
839 */
840 i_size_write(inode, abs_to);
841 inode->i_blocks = ocfs2_inode_sector_count(inode);
842 di->i_size = cpu_to_le64((u64)i_size_read(inode));
Deepa Dinamani078cd822016-09-14 07:48:04 -0700843 inode->i_mtime = inode->i_ctime = current_time(inode);
Junxiao Bif775da22014-10-09 15:25:15 -0700844 di->i_mtime = di->i_ctime = cpu_to_le64(inode->i_mtime.tv_sec);
845 di->i_ctime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
846 di->i_mtime_nsec = di->i_ctime_nsec;
Junxiao Bic7d2cbc2014-02-10 14:25:53 -0800847 if (handle) {
Junxiao Bic7d2cbc2014-02-10 14:25:53 -0800848 ocfs2_journal_dirty(handle, di_bh);
Darrick J. Wong6fdb7022014-04-03 14:47:08 -0700849 ocfs2_update_inode_fsync_trans(handle, inode, 1);
Junxiao Bic7d2cbc2014-02-10 14:25:53 -0800850 }
Joel Beckera4bfb4c2010-07-06 14:36:06 -0700851
Mark Fashehccd979b2005-12-15 14:31:24 -0800852out_unlock:
853 unlock_page(page);
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300854 put_page(page);
Junxiao Bif775da22014-10-09 15:25:15 -0700855out_commit_trans:
856 if (handle)
857 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800858out:
859 return ret;
860}
861
Joel Becker56934862010-07-01 15:13:31 -0700862/*
863 * Find the next range to zero. We do this in terms of bytes because
864 * that's what ocfs2_zero_extend() wants, and it is dealing with the
865 * pagecache. We may return multiple extents.
866 *
867 * zero_start and zero_end are ocfs2_zero_extend()s current idea of what
868 * needs to be zeroed. range_start and range_end return the next zeroing
869 * range. A subsequent call should pass the previous range_end as its
870 * zero_start. If range_end is 0, there's nothing to do.
871 *
872 * Unwritten extents are skipped over. Refcounted extents are CoWd.
873 */
874static int ocfs2_zero_extend_get_range(struct inode *inode,
875 struct buffer_head *di_bh,
876 u64 zero_start, u64 zero_end,
877 u64 *range_start, u64 *range_end)
Mark Fashehccd979b2005-12-15 14:31:24 -0800878{
Joel Becker56934862010-07-01 15:13:31 -0700879 int rc = 0, needs_cow = 0;
880 u32 p_cpos, zero_clusters = 0;
881 u32 zero_cpos =
882 zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
883 u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end);
884 unsigned int num_clusters = 0;
885 unsigned int ext_flags = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -0800886
Joel Becker56934862010-07-01 15:13:31 -0700887 while (zero_cpos < last_cpos) {
888 rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos,
889 &num_clusters, &ext_flags);
890 if (rc) {
891 mlog_errno(rc);
Mark Fashehccd979b2005-12-15 14:31:24 -0800892 goto out;
893 }
894
Joel Becker56934862010-07-01 15:13:31 -0700895 if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) {
896 zero_clusters = num_clusters;
897 if (ext_flags & OCFS2_EXT_REFCOUNTED)
898 needs_cow = 1;
899 break;
900 }
901
902 zero_cpos += num_clusters;
903 }
904 if (!zero_clusters) {
905 *range_end = 0;
906 goto out;
907 }
908
909 while ((zero_cpos + zero_clusters) < last_cpos) {
910 rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters,
911 &p_cpos, &num_clusters,
912 &ext_flags);
913 if (rc) {
914 mlog_errno(rc);
915 goto out;
916 }
917
918 if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN))
919 break;
920 if (ext_flags & OCFS2_EXT_REFCOUNTED)
921 needs_cow = 1;
922 zero_clusters += num_clusters;
923 }
924 if ((zero_cpos + zero_clusters) > last_cpos)
925 zero_clusters = last_cpos - zero_cpos;
926
927 if (needs_cow) {
Tiger Yangc7dd3392013-08-13 16:00:58 -0700928 rc = ocfs2_refcount_cow(inode, di_bh, zero_cpos,
Tao Ma15502712010-08-12 10:36:38 +0800929 zero_clusters, UINT_MAX);
Joel Becker56934862010-07-01 15:13:31 -0700930 if (rc) {
931 mlog_errno(rc);
932 goto out;
933 }
934 }
935
936 *range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos);
937 *range_end = ocfs2_clusters_to_bytes(inode->i_sb,
938 zero_cpos + zero_clusters);
939
940out:
941 return rc;
942}
943
944/*
945 * Zero one range returned from ocfs2_zero_extend_get_range(). The caller
946 * has made sure that the entire range needs zeroing.
947 */
948static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start,
Junxiao Bic7d2cbc2014-02-10 14:25:53 -0800949 u64 range_end, struct buffer_head *di_bh)
Joel Becker56934862010-07-01 15:13:31 -0700950{
951 int rc = 0;
952 u64 next_pos;
953 u64 zero_pos = range_start;
954
Tao Ma468eedd2011-02-22 22:14:41 +0800955 trace_ocfs2_zero_extend_range(
956 (unsigned long long)OCFS2_I(inode)->ip_blkno,
957 (unsigned long long)range_start,
958 (unsigned long long)range_end);
Joel Becker56934862010-07-01 15:13:31 -0700959 BUG_ON(range_start >= range_end);
960
961 while (zero_pos < range_end) {
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300962 next_pos = (zero_pos & PAGE_MASK) + PAGE_SIZE;
Joel Becker56934862010-07-01 15:13:31 -0700963 if (next_pos > range_end)
964 next_pos = range_end;
Junxiao Bic7d2cbc2014-02-10 14:25:53 -0800965 rc = ocfs2_write_zero_page(inode, zero_pos, next_pos, di_bh);
Joel Becker56934862010-07-01 15:13:31 -0700966 if (rc < 0) {
967 mlog_errno(rc);
968 break;
969 }
970 zero_pos = next_pos;
Mark Fashehe2057c52006-10-03 17:53:05 -0700971
972 /*
973 * Very large extends have the potential to lock up
974 * the cpu for extended periods of time.
975 */
976 cond_resched();
Mark Fashehccd979b2005-12-15 14:31:24 -0800977 }
978
Joel Becker56934862010-07-01 15:13:31 -0700979 return rc;
980}
981
982int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh,
983 loff_t zero_to_size)
984{
985 int ret = 0;
986 u64 zero_start, range_start = 0, range_end = 0;
987 struct super_block *sb = inode->i_sb;
988
989 zero_start = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode));
Tao Ma468eedd2011-02-22 22:14:41 +0800990 trace_ocfs2_zero_extend((unsigned long long)OCFS2_I(inode)->ip_blkno,
991 (unsigned long long)zero_start,
992 (unsigned long long)i_size_read(inode));
Joel Becker56934862010-07-01 15:13:31 -0700993 while (zero_start < zero_to_size) {
994 ret = ocfs2_zero_extend_get_range(inode, di_bh, zero_start,
995 zero_to_size,
996 &range_start,
997 &range_end);
998 if (ret) {
999 mlog_errno(ret);
1000 break;
1001 }
1002 if (!range_end)
1003 break;
1004 /* Trim the ends */
1005 if (range_start < zero_start)
1006 range_start = zero_start;
1007 if (range_end > zero_to_size)
1008 range_end = zero_to_size;
1009
1010 ret = ocfs2_zero_extend_range(inode, range_start,
Junxiao Bic7d2cbc2014-02-10 14:25:53 -08001011 range_end, di_bh);
Joel Becker56934862010-07-01 15:13:31 -07001012 if (ret) {
1013 mlog_errno(ret);
1014 break;
1015 }
1016 zero_start = range_end;
1017 }
1018
Mark Fashehccd979b2005-12-15 14:31:24 -08001019 return ret;
1020}
1021
Joel Becker56934862010-07-01 15:13:31 -07001022int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh,
1023 u64 new_i_size, u64 zero_to)
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001024{
1025 int ret;
1026 u32 clusters_to_add;
1027 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1028
Joel Becker56934862010-07-01 15:13:31 -07001029 /*
1030 * Only quota files call this without a bh, and they can't be
1031 * refcounted.
1032 */
Darrick J. Wong84e40082016-11-09 14:13:09 -08001033 BUG_ON(!di_bh && ocfs2_is_refcount_inode(inode));
Joel Becker56934862010-07-01 15:13:31 -07001034 BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE));
1035
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001036 clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size);
1037 if (clusters_to_add < oi->ip_clusters)
1038 clusters_to_add = 0;
1039 else
1040 clusters_to_add -= oi->ip_clusters;
1041
1042 if (clusters_to_add) {
1043 ret = __ocfs2_extend_allocation(inode, oi->ip_clusters,
1044 clusters_to_add, 0);
1045 if (ret) {
1046 mlog_errno(ret);
1047 goto out;
1048 }
1049 }
1050
1051 /*
1052 * Call this even if we don't add any clusters to the tree. We
1053 * still need to zero the area between the old i_size and the
1054 * new i_size.
1055 */
Joel Becker56934862010-07-01 15:13:31 -07001056 ret = ocfs2_zero_extend(inode, di_bh, zero_to);
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001057 if (ret < 0)
1058 mlog_errno(ret);
1059
1060out:
1061 return ret;
1062}
1063
Mark Fashehccd979b2005-12-15 14:31:24 -08001064static int ocfs2_extend_file(struct inode *inode,
1065 struct buffer_head *di_bh,
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001066 u64 new_i_size)
Mark Fashehccd979b2005-12-15 14:31:24 -08001067{
Mark Fashehc934a922007-10-18 15:23:46 -07001068 int ret = 0;
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001069 struct ocfs2_inode_info *oi = OCFS2_I(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001070
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001071 BUG_ON(!di_bh);
Mark Fasheh53013cb2006-05-05 19:04:03 -07001072
Mark Fashehccd979b2005-12-15 14:31:24 -08001073 /* setattr sometimes calls us like this. */
1074 if (new_i_size == 0)
1075 goto out;
1076
1077 if (i_size_read(inode) == new_i_size)
Joel Becker56934862010-07-01 15:13:31 -07001078 goto out;
Mark Fashehccd979b2005-12-15 14:31:24 -08001079 BUG_ON(new_i_size < i_size_read(inode));
1080
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001081 /*
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001082 * The alloc sem blocks people in read/write from reading our
1083 * allocation until we're done changing it. We depend on
1084 * i_mutex to block other extend/truncate calls while we're
Joel Becker56934862010-07-01 15:13:31 -07001085 * here. We even have to hold it for sparse files because there
1086 * might be some tail zeroing.
Mark Fasheh0effef72006-10-03 17:44:42 -07001087 */
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001088 down_write(&oi->ip_alloc_sem);
1089
1090 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1091 /*
1092 * We can optimize small extends by keeping the inodes
1093 * inline data.
1094 */
1095 if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) {
1096 up_write(&oi->ip_alloc_sem);
1097 goto out_update_size;
1098 }
1099
1100 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
1101 if (ret) {
1102 up_write(&oi->ip_alloc_sem);
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001103 mlog_errno(ret);
Mark Fashehc934a922007-10-18 15:23:46 -07001104 goto out;
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001105 }
1106 }
1107
Joel Becker56934862010-07-01 15:13:31 -07001108 if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
1109 ret = ocfs2_zero_extend(inode, di_bh, new_i_size);
1110 else
1111 ret = ocfs2_extend_no_holes(inode, di_bh, new_i_size,
1112 new_i_size);
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001113
1114 up_write(&oi->ip_alloc_sem);
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001115
Mark Fasheh0effef72006-10-03 17:44:42 -07001116 if (ret < 0) {
1117 mlog_errno(ret);
Mark Fashehc934a922007-10-18 15:23:46 -07001118 goto out;
Mark Fashehccd979b2005-12-15 14:31:24 -08001119 }
1120
Mark Fasheh3a0782d2007-01-17 12:53:31 -08001121out_update_size:
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001122 ret = ocfs2_simple_size_update(inode, di_bh, new_i_size);
1123 if (ret < 0)
1124 mlog_errno(ret);
Mark Fasheh53013cb2006-05-05 19:04:03 -07001125
Mark Fashehccd979b2005-12-15 14:31:24 -08001126out:
1127 return ret;
1128}
1129
1130int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
1131{
1132 int status = 0, size_change;
Tariq Saeed3d46a442015-09-04 15:44:31 -07001133 int inode_locked = 0;
David Howells2b0143b2015-03-17 22:25:59 +00001134 struct inode *inode = d_inode(dentry);
Mark Fashehccd979b2005-12-15 14:31:24 -08001135 struct super_block *sb = inode->i_sb;
1136 struct ocfs2_super *osb = OCFS2_SB(sb);
1137 struct buffer_head *bh = NULL;
Mark Fasheh1fabe142006-10-09 18:11:45 -07001138 handle_t *handle = NULL;
Jan Kara65bac572009-06-02 14:24:01 +02001139 struct dquot *transfer_to[MAXQUOTAS] = { };
Jan Kara52a9ee22010-05-13 20:18:45 +02001140 int qtype;
Eric Renb891fa502017-02-22 15:40:44 -08001141 int had_lock;
1142 struct ocfs2_lock_holder oh;
Mark Fashehccd979b2005-12-15 14:31:24 -08001143
Tao Ma468eedd2011-02-22 22:14:41 +08001144 trace_ocfs2_setattr(inode, dentry,
1145 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1146 dentry->d_name.len, dentry->d_name.name,
1147 attr->ia_valid, attr->ia_mode,
Eric W. Biedermanba613562013-01-31 17:33:53 -08001148 from_kuid(&init_user_ns, attr->ia_uid),
1149 from_kgid(&init_user_ns, attr->ia_gid));
Mark Fashehccd979b2005-12-15 14:31:24 -08001150
Sunil Mushranbc535802008-04-18 10:23:53 -07001151 /* ensuring we don't even attempt to truncate a symlink */
1152 if (S_ISLNK(inode->i_mode))
1153 attr->ia_valid &= ~ATTR_SIZE;
1154
Mark Fashehccd979b2005-12-15 14:31:24 -08001155#define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \
1156 | ATTR_GID | ATTR_UID | ATTR_MODE)
Tao Ma468eedd2011-02-22 22:14:41 +08001157 if (!(attr->ia_valid & OCFS2_VALID_ATTRS))
Mark Fashehccd979b2005-12-15 14:31:24 -08001158 return 0;
Mark Fashehccd979b2005-12-15 14:31:24 -08001159
Jan Kara31051c82016-05-26 16:55:18 +02001160 status = setattr_prepare(dentry, attr);
Mark Fashehccd979b2005-12-15 14:31:24 -08001161 if (status)
1162 return status;
1163
Jan Kara9c89fe02015-07-14 13:36:02 +02001164 if (is_quota_modification(inode, attr)) {
1165 status = dquot_initialize(inode);
1166 if (status)
1167 return status;
1168 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001169 size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE;
1170 if (size_change) {
1171 status = ocfs2_rw_lock(inode, 1);
1172 if (status < 0) {
1173 mlog_errno(status);
1174 goto bail;
1175 }
1176 }
1177
Eric Renb891fa502017-02-22 15:40:44 -08001178 had_lock = ocfs2_inode_lock_tracker(inode, &bh, 1, &oh);
1179 if (had_lock < 0) {
1180 status = had_lock;
Mark Fashehccd979b2005-12-15 14:31:24 -08001181 goto bail_unlock_rw;
Eric Renb891fa502017-02-22 15:40:44 -08001182 } else if (had_lock) {
1183 /*
1184 * As far as we know, ocfs2_setattr() could only be the first
1185 * VFS entry point in the call chain of recursive cluster
1186 * locking issue.
1187 *
1188 * For instance:
1189 * chmod_common()
1190 * notify_change()
1191 * ocfs2_setattr()
1192 * posix_acl_chmod()
1193 * ocfs2_iop_get_acl()
1194 *
1195 * But, we're not 100% sure if it's always true, because the
1196 * ordering of the VFS entry points in the call chain is out
1197 * of our control. So, we'd better dump the stack here to
1198 * catch the other cases of recursive locking.
1199 */
1200 mlog(ML_ERROR, "Another case of recursive locking:\n");
1201 dump_stack();
Mark Fashehccd979b2005-12-15 14:31:24 -08001202 }
Tariq Saeed3d46a442015-09-04 15:44:31 -07001203 inode_locked = 1;
Mark Fashehccd979b2005-12-15 14:31:24 -08001204
Younger Liud62e74b2014-02-10 14:25:51 -08001205 if (size_change) {
Wengang Wang5051f762010-02-26 18:18:25 +08001206 status = inode_newsize_ok(inode, attr->ia_size);
1207 if (status)
Mark Fashehce76fd32007-07-20 12:02:14 -07001208 goto bail_unlock;
Mark Fashehce76fd32007-07-20 12:02:14 -07001209
Christoph Hellwig562c72a2011-06-24 14:29:45 -04001210 inode_dio_wait(inode);
1211
Younger Liud62e74b2014-02-10 14:25:51 -08001212 if (i_size_read(inode) >= attr->ia_size) {
Joel Becker2b4e30f2008-09-03 20:03:41 -07001213 if (ocfs2_should_order_data(inode)) {
1214 status = ocfs2_begin_ordered_truncate(inode,
1215 attr->ia_size);
1216 if (status)
1217 goto bail_unlock;
1218 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001219 status = ocfs2_truncate_file(inode, bh, attr->ia_size);
Joel Becker2b4e30f2008-09-03 20:03:41 -07001220 } else
Mark Fasheh65ed39d2007-08-28 17:13:23 -07001221 status = ocfs2_extend_file(inode, bh, attr->ia_size);
Mark Fashehccd979b2005-12-15 14:31:24 -08001222 if (status < 0) {
1223 if (status != -ENOSPC)
1224 mlog_errno(status);
1225 status = -ENOSPC;
1226 goto bail_unlock;
1227 }
1228 }
1229
Eric W. Biederman488c8ef2013-01-31 17:35:29 -08001230 if ((attr->ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) ||
1231 (attr->ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) {
Jan Kara65bac572009-06-02 14:24:01 +02001232 /*
1233 * Gather pointers to quota structures so that allocation /
1234 * freeing of quota structures happens here and not inside
Christoph Hellwigb43fa822010-03-03 09:05:03 -05001235 * dquot_transfer() where we have problems with lock ordering
Jan Kara65bac572009-06-02 14:24:01 +02001236 */
Eric W. Biederman488c8ef2013-01-31 17:35:29 -08001237 if (attr->ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)
Jan Karaa90714c2008-10-09 19:38:40 +02001238 && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1239 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
Eric W. Biedermanaca645a2012-09-16 03:11:50 -07001240 transfer_to[USRQUOTA] = dqget(sb, make_kqid_uid(attr->ia_uid));
Jan Kara6184fc02015-06-24 18:07:02 +02001241 if (IS_ERR(transfer_to[USRQUOTA])) {
1242 status = PTR_ERR(transfer_to[USRQUOTA]);
Jan Karaa90714c2008-10-09 19:38:40 +02001243 goto bail_unlock;
Jan Kara65bac572009-06-02 14:24:01 +02001244 }
Jan Karaa90714c2008-10-09 19:38:40 +02001245 }
Eric W. Biederman488c8ef2013-01-31 17:35:29 -08001246 if (attr->ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid)
Jan Karaa90714c2008-10-09 19:38:40 +02001247 && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1248 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
Eric W. Biedermanaca645a2012-09-16 03:11:50 -07001249 transfer_to[GRPQUOTA] = dqget(sb, make_kqid_gid(attr->ia_gid));
Jan Kara6184fc02015-06-24 18:07:02 +02001250 if (IS_ERR(transfer_to[GRPQUOTA])) {
1251 status = PTR_ERR(transfer_to[GRPQUOTA]);
Jan Karaa90714c2008-10-09 19:38:40 +02001252 goto bail_unlock;
Jan Kara65bac572009-06-02 14:24:01 +02001253 }
Jan Karaa90714c2008-10-09 19:38:40 +02001254 }
Jan Kara65bac572009-06-02 14:24:01 +02001255 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS +
1256 2 * ocfs2_quota_trans_credits(sb));
Jan Karaa90714c2008-10-09 19:38:40 +02001257 if (IS_ERR(handle)) {
1258 status = PTR_ERR(handle);
1259 mlog_errno(status);
1260 goto bail_unlock;
1261 }
Jan Kara52a9ee22010-05-13 20:18:45 +02001262 status = __dquot_transfer(inode, transfer_to);
Jan Karaa90714c2008-10-09 19:38:40 +02001263 if (status < 0)
1264 goto bail_commit;
1265 } else {
1266 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1267 if (IS_ERR(handle)) {
1268 status = PTR_ERR(handle);
1269 mlog_errno(status);
1270 goto bail_unlock;
1271 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001272 }
1273
Christoph Hellwig10257742010-06-04 11:30:02 +02001274 setattr_copy(inode, attr);
1275 mark_inode_dirty(inode);
1276
Mark Fashehccd979b2005-12-15 14:31:24 -08001277 status = ocfs2_mark_inode_dirty(handle, inode, bh);
1278 if (status < 0)
1279 mlog_errno(status);
1280
1281bail_commit:
Mark Fasheh02dc1af2006-10-09 16:48:10 -07001282 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -08001283bail_unlock:
Eric Renb891fa502017-02-22 15:40:44 -08001284 if (status && inode_locked) {
1285 ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock);
Tariq Saeed3d46a442015-09-04 15:44:31 -07001286 inode_locked = 0;
1287 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001288bail_unlock_rw:
1289 if (size_change)
1290 ocfs2_rw_unlock(inode, 1);
1291bail:
Mark Fashehccd979b2005-12-15 14:31:24 -08001292
Jan Kara65bac572009-06-02 14:24:01 +02001293 /* Release quota pointers in case we acquired them */
Jan Kara52362812014-09-10 21:06:39 +02001294 for (qtype = 0; qtype < OCFS2_MAXQUOTAS; qtype++)
Jan Kara65bac572009-06-02 14:24:01 +02001295 dqput(transfer_to[qtype]);
Jan Kara65bac572009-06-02 14:24:01 +02001296
Tiger Yang060bc662008-11-14 11:17:29 +08001297 if (!status && attr->ia_valid & ATTR_MODE) {
Junxiao Bi5ee0fbd2016-05-12 15:42:15 -07001298 status = ocfs2_acl_chmod(inode, bh);
Tiger Yang060bc662008-11-14 11:17:29 +08001299 if (status < 0)
1300 mlog_errno(status);
1301 }
Tariq Saeed3d46a442015-09-04 15:44:31 -07001302 if (inode_locked)
Eric Renb891fa502017-02-22 15:40:44 -08001303 ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock);
Tiger Yang060bc662008-11-14 11:17:29 +08001304
Junxiao Bi5ee0fbd2016-05-12 15:42:15 -07001305 brelse(bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08001306 return status;
1307}
1308
David Howellsa528d352017-01-31 16:46:22 +00001309int ocfs2_getattr(const struct path *path, struct kstat *stat,
1310 u32 request_mask, unsigned int flags)
Mark Fashehccd979b2005-12-15 14:31:24 -08001311{
David Howellsa528d352017-01-31 16:46:22 +00001312 struct inode *inode = d_inode(path->dentry);
1313 struct super_block *sb = path->dentry->d_sb;
Mark Fashehccd979b2005-12-15 14:31:24 -08001314 struct ocfs2_super *osb = sb->s_fs_info;
1315 int err;
1316
David Howellsa528d352017-01-31 16:46:22 +00001317 err = ocfs2_inode_revalidate(path->dentry);
Mark Fashehccd979b2005-12-15 14:31:24 -08001318 if (err) {
1319 if (err != -ENOENT)
1320 mlog_errno(err);
1321 goto bail;
1322 }
1323
1324 generic_fillattr(inode, stat);
John Haxbyd6364622016-01-14 15:17:12 -08001325 /*
1326 * If there is inline data in the inode, the inode will normally not
1327 * have data blocks allocated (it may have an external xattr block).
1328 * Report at least one sector for such files, so tools like tar, rsync,
1329 * others don't incorrectly think the file is completely sparse.
1330 */
1331 if (unlikely(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL))
1332 stat->blocks += (stat->size + 511)>>9;
Mark Fashehccd979b2005-12-15 14:31:24 -08001333
1334 /* We set the blksize from the cluster size for performance */
1335 stat->blksize = osb->s_clustersize;
1336
1337bail:
Mark Fashehccd979b2005-12-15 14:31:24 -08001338 return err;
1339}
1340
Al Viro10556cb2011-06-20 19:28:19 -04001341int ocfs2_permission(struct inode *inode, int mask)
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001342{
Eric Renb891fa502017-02-22 15:40:44 -08001343 int ret, had_lock;
1344 struct ocfs2_lock_holder oh;
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001345
Al Viro10556cb2011-06-20 19:28:19 -04001346 if (mask & MAY_NOT_BLOCK)
Nick Pigginb74c79e2011-01-07 17:49:58 +11001347 return -ECHILD;
1348
Eric Renb891fa502017-02-22 15:40:44 -08001349 had_lock = ocfs2_inode_lock_tracker(inode, NULL, 0, &oh);
1350 if (had_lock < 0) {
1351 ret = had_lock;
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001352 goto out;
Eric Renb891fa502017-02-22 15:40:44 -08001353 } else if (had_lock) {
1354 /* See comments in ocfs2_setattr() for details.
1355 * The call chain of this case could be:
1356 * do_sys_open()
1357 * may_open()
1358 * inode_permission()
1359 * ocfs2_permission()
1360 * ocfs2_iop_get_acl()
1361 */
1362 mlog(ML_ERROR, "Another case of recursive locking:\n");
1363 dump_stack();
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001364 }
1365
Al Viro2830ba72011-06-20 19:16:29 -04001366 ret = generic_permission(inode, mask);
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001367
Eric Renb891fa502017-02-22 15:40:44 -08001368 ocfs2_inode_unlock_tracker(inode, 0, &oh, had_lock);
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001369out:
Tiger Yangd38eb8d2006-11-27 09:59:21 +08001370 return ret;
1371}
1372
Mark Fashehb2580102007-03-09 16:53:21 -08001373static int __ocfs2_write_remove_suid(struct inode *inode,
1374 struct buffer_head *bh)
Mark Fashehccd979b2005-12-15 14:31:24 -08001375{
1376 int ret;
Mark Fasheh1fabe142006-10-09 18:11:45 -07001377 handle_t *handle;
Mark Fashehccd979b2005-12-15 14:31:24 -08001378 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1379 struct ocfs2_dinode *di;
1380
Tao Ma468eedd2011-02-22 22:14:41 +08001381 trace_ocfs2_write_remove_suid(
1382 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1383 inode->i_mode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001384
Mark Fasheh65eff9c2006-10-09 17:26:22 -07001385 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
Jan Karafa38e922008-10-20 19:23:51 +02001386 if (IS_ERR(handle)) {
1387 ret = PTR_ERR(handle);
Mark Fashehccd979b2005-12-15 14:31:24 -08001388 mlog_errno(ret);
1389 goto out;
1390 }
1391
Joel Becker0cf2f762009-02-12 16:41:25 -08001392 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
Joel Becker13723d02008-10-17 19:25:01 -07001393 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -08001394 if (ret < 0) {
1395 mlog_errno(ret);
Mark Fashehb2580102007-03-09 16:53:21 -08001396 goto out_trans;
Mark Fashehccd979b2005-12-15 14:31:24 -08001397 }
1398
1399 inode->i_mode &= ~S_ISUID;
1400 if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP))
1401 inode->i_mode &= ~S_ISGID;
1402
1403 di = (struct ocfs2_dinode *) bh->b_data;
1404 di->i_mode = cpu_to_le16(inode->i_mode);
Darrick J. Wong6fdb7022014-04-03 14:47:08 -07001405 ocfs2_update_inode_fsync_trans(handle, inode, 0);
Mark Fashehccd979b2005-12-15 14:31:24 -08001406
Joel Beckerec20cec2010-03-19 14:13:52 -07001407 ocfs2_journal_dirty(handle, bh);
Mark Fashehb2580102007-03-09 16:53:21 -08001408
Mark Fashehccd979b2005-12-15 14:31:24 -08001409out_trans:
Mark Fasheh02dc1af2006-10-09 16:48:10 -07001410 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -08001411out:
Mark Fashehccd979b2005-12-15 14:31:24 -08001412 return ret;
1413}
1414
Mark Fashehb2580102007-03-09 16:53:21 -08001415static int ocfs2_write_remove_suid(struct inode *inode)
1416{
1417 int ret;
1418 struct buffer_head *bh = NULL;
Mark Fashehb2580102007-03-09 16:53:21 -08001419
Joel Beckerb657c952008-11-13 14:49:11 -08001420 ret = ocfs2_read_inode_block(inode, &bh);
Mark Fashehb2580102007-03-09 16:53:21 -08001421 if (ret < 0) {
1422 mlog_errno(ret);
1423 goto out;
1424 }
1425
1426 ret = __ocfs2_write_remove_suid(inode, bh);
1427out:
1428 brelse(bh);
1429 return ret;
1430}
1431
Mark Fasheh2ae99a62007-03-09 16:43:28 -08001432/*
1433 * Allocate enough extents to cover the region starting at byte offset
1434 * start for len bytes. Existing extents are skipped, any extents
1435 * added are marked as "unwritten".
1436 */
1437static int ocfs2_allocate_unwritten_extents(struct inode *inode,
1438 u64 start, u64 len)
1439{
1440 int ret;
1441 u32 cpos, phys_cpos, clusters, alloc_size;
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001442 u64 end = start + len;
1443 struct buffer_head *di_bh = NULL;
1444
1445 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
Joel Beckerb657c952008-11-13 14:49:11 -08001446 ret = ocfs2_read_inode_block(inode, &di_bh);
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001447 if (ret) {
1448 mlog_errno(ret);
1449 goto out;
1450 }
1451
1452 /*
1453 * Nothing to do if the requested reservation range
1454 * fits within the inode.
1455 */
1456 if (ocfs2_size_fits_inline_data(di_bh, end))
1457 goto out;
1458
1459 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
1460 if (ret) {
1461 mlog_errno(ret);
1462 goto out;
1463 }
1464 }
Mark Fasheh2ae99a62007-03-09 16:43:28 -08001465
1466 /*
1467 * We consider both start and len to be inclusive.
1468 */
1469 cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
1470 clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len);
1471 clusters -= cpos;
1472
1473 while (clusters) {
1474 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
1475 &alloc_size, NULL);
1476 if (ret) {
1477 mlog_errno(ret);
1478 goto out;
1479 }
1480
1481 /*
1482 * Hole or existing extent len can be arbitrary, so
1483 * cap it to our own allocation request.
1484 */
1485 if (alloc_size > clusters)
1486 alloc_size = clusters;
1487
1488 if (phys_cpos) {
1489 /*
1490 * We already have an allocation at this
1491 * region so we can safely skip it.
1492 */
1493 goto next;
1494 }
1495
1496 ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
1497 if (ret) {
1498 if (ret != -ENOSPC)
1499 mlog_errno(ret);
1500 goto out;
1501 }
1502
1503next:
1504 cpos += alloc_size;
1505 clusters -= alloc_size;
1506 }
1507
1508 ret = 0;
1509out:
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001510
1511 brelse(di_bh);
Mark Fasheh2ae99a62007-03-09 16:43:28 -08001512 return ret;
1513}
1514
Mark Fasheh063c4562007-07-03 13:34:11 -07001515/*
1516 * Truncate a byte range, avoiding pages within partial clusters. This
1517 * preserves those pages for the zeroing code to write to.
1518 */
1519static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start,
1520 u64 byte_len)
1521{
1522 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1523 loff_t start, end;
1524 struct address_space *mapping = inode->i_mapping;
1525
1526 start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start);
1527 end = byte_start + byte_len;
1528 end = end & ~(osb->s_clustersize - 1);
1529
1530 if (start < end) {
1531 unmap_mapping_range(mapping, start, end - start, 0);
1532 truncate_inode_pages_range(mapping, start, end - 1);
1533 }
1534}
1535
1536static int ocfs2_zero_partial_clusters(struct inode *inode,
1537 u64 start, u64 len)
1538{
1539 int ret = 0;
Ashish Samantd21c3532016-09-19 14:44:42 -07001540 u64 tmpend = 0;
1541 u64 end = start + len;
Mark Fasheh063c4562007-07-03 13:34:11 -07001542 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1543 unsigned int csize = osb->s_clustersize;
1544 handle_t *handle;
1545
1546 /*
1547 * The "start" and "end" values are NOT necessarily part of
1548 * the range whose allocation is being deleted. Rather, this
1549 * is what the user passed in with the request. We must zero
1550 * partial clusters here. There's no need to worry about
1551 * physical allocation - the zeroing code knows to skip holes.
1552 */
Tao Ma468eedd2011-02-22 22:14:41 +08001553 trace_ocfs2_zero_partial_clusters(
1554 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1555 (unsigned long long)start, (unsigned long long)end);
Mark Fasheh063c4562007-07-03 13:34:11 -07001556
1557 /*
1558 * If both edges are on a cluster boundary then there's no
1559 * zeroing required as the region is part of the allocation to
1560 * be truncated.
1561 */
1562 if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0)
1563 goto out;
1564
1565 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
Jan Karafa38e922008-10-20 19:23:51 +02001566 if (IS_ERR(handle)) {
1567 ret = PTR_ERR(handle);
Mark Fasheh063c4562007-07-03 13:34:11 -07001568 mlog_errno(ret);
1569 goto out;
1570 }
1571
1572 /*
Ashish Samantd21c3532016-09-19 14:44:42 -07001573 * If start is on a cluster boundary and end is somewhere in another
1574 * cluster, we have not COWed the cluster starting at start, unless
1575 * end is also within the same cluster. So, in this case, we skip this
1576 * first call to ocfs2_zero_range_for_truncate() truncate and move on
1577 * to the next one.
Mark Fasheh063c4562007-07-03 13:34:11 -07001578 */
Ashish Samantd21c3532016-09-19 14:44:42 -07001579 if ((start & (csize - 1)) != 0) {
1580 /*
1581 * We want to get the byte offset of the end of the 1st
1582 * cluster.
1583 */
1584 tmpend = (u64)osb->s_clustersize +
1585 (start & ~(osb->s_clustersize - 1));
1586 if (tmpend > end)
1587 tmpend = end;
Mark Fasheh063c4562007-07-03 13:34:11 -07001588
Ashish Samantd21c3532016-09-19 14:44:42 -07001589 trace_ocfs2_zero_partial_clusters_range1(
1590 (unsigned long long)start,
1591 (unsigned long long)tmpend);
Mark Fasheh063c4562007-07-03 13:34:11 -07001592
Ashish Samantd21c3532016-09-19 14:44:42 -07001593 ret = ocfs2_zero_range_for_truncate(inode, handle, start,
1594 tmpend);
1595 if (ret)
1596 mlog_errno(ret);
1597 }
Mark Fasheh063c4562007-07-03 13:34:11 -07001598
1599 if (tmpend < end) {
1600 /*
1601 * This may make start and end equal, but the zeroing
1602 * code will skip any work in that case so there's no
1603 * need to catch it up here.
1604 */
1605 start = end & ~(osb->s_clustersize - 1);
1606
Tao Ma468eedd2011-02-22 22:14:41 +08001607 trace_ocfs2_zero_partial_clusters_range2(
1608 (unsigned long long)start, (unsigned long long)end);
Mark Fasheh063c4562007-07-03 13:34:11 -07001609
1610 ret = ocfs2_zero_range_for_truncate(inode, handle, start, end);
1611 if (ret)
1612 mlog_errno(ret);
1613 }
Darrick J. Wong6fdb7022014-04-03 14:47:08 -07001614 ocfs2_update_inode_fsync_trans(handle, inode, 1);
Mark Fasheh063c4562007-07-03 13:34:11 -07001615
1616 ocfs2_commit_trans(osb, handle);
1617out:
1618 return ret;
1619}
1620
Tristan Yec1631d42010-05-11 17:54:45 +08001621static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos)
1622{
1623 int i;
1624 struct ocfs2_extent_rec *rec = NULL;
1625
1626 for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
1627
1628 rec = &el->l_recs[i];
1629
1630 if (le32_to_cpu(rec->e_cpos) < pos)
1631 break;
1632 }
1633
1634 return i;
1635}
1636
1637/*
1638 * Helper to calculate the punching pos and length in one run, we handle the
1639 * following three cases in order:
1640 *
1641 * - remove the entire record
1642 * - remove a partial record
1643 * - no record needs to be removed (hole-punching completed)
1644*/
1645static void ocfs2_calc_trunc_pos(struct inode *inode,
1646 struct ocfs2_extent_list *el,
1647 struct ocfs2_extent_rec *rec,
1648 u32 trunc_start, u32 *trunc_cpos,
1649 u32 *trunc_len, u32 *trunc_end,
1650 u64 *blkno, int *done)
1651{
1652 int ret = 0;
1653 u32 coff, range;
1654
1655 range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);
1656
1657 if (le32_to_cpu(rec->e_cpos) >= trunc_start) {
Tristan Ye9a790ba2011-05-12 20:47:07 +08001658 /*
1659 * remove an entire extent record.
1660 */
Tristan Yec1631d42010-05-11 17:54:45 +08001661 *trunc_cpos = le32_to_cpu(rec->e_cpos);
1662 /*
1663 * Skip holes if any.
1664 */
1665 if (range < *trunc_end)
1666 *trunc_end = range;
1667 *trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos);
1668 *blkno = le64_to_cpu(rec->e_blkno);
1669 *trunc_end = le32_to_cpu(rec->e_cpos);
1670 } else if (range > trunc_start) {
Tristan Ye9a790ba2011-05-12 20:47:07 +08001671 /*
1672 * remove a partial extent record, which means we're
1673 * removing the last extent record.
1674 */
Tristan Yec1631d42010-05-11 17:54:45 +08001675 *trunc_cpos = trunc_start;
Tristan Ye9a790ba2011-05-12 20:47:07 +08001676 /*
1677 * skip hole if any.
1678 */
1679 if (range < *trunc_end)
1680 *trunc_end = range;
Tristan Yec1631d42010-05-11 17:54:45 +08001681 *trunc_len = *trunc_end - trunc_start;
1682 coff = trunc_start - le32_to_cpu(rec->e_cpos);
1683 *blkno = le64_to_cpu(rec->e_blkno) +
1684 ocfs2_clusters_to_blocks(inode->i_sb, coff);
1685 *trunc_end = trunc_start;
1686 } else {
1687 /*
1688 * It may have two following possibilities:
1689 *
1690 * - last record has been removed
1691 * - trunc_start was within a hole
1692 *
1693 * both two cases mean the completion of hole punching.
1694 */
1695 ret = 1;
1696 }
1697
1698 *done = ret;
1699}
1700
Darrick J. Wong29ac8e82016-11-09 14:13:11 -08001701int ocfs2_remove_inode_range(struct inode *inode,
1702 struct buffer_head *di_bh, u64 byte_start,
1703 u64 byte_len)
Mark Fasheh063c4562007-07-03 13:34:11 -07001704{
Tristan Yec1631d42010-05-11 17:54:45 +08001705 int ret = 0, flags = 0, done = 0, i;
1706 u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos;
1707 u32 cluster_in_el;
Mark Fasheh063c4562007-07-03 13:34:11 -07001708 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1709 struct ocfs2_cached_dealloc_ctxt dealloc;
Mark Fashehb1967d02007-11-20 11:56:39 -08001710 struct address_space *mapping = inode->i_mapping;
Mark Fashehfecc0112008-11-12 15:16:38 -08001711 struct ocfs2_extent_tree et;
Tristan Yec1631d42010-05-11 17:54:45 +08001712 struct ocfs2_path *path = NULL;
1713 struct ocfs2_extent_list *el = NULL;
1714 struct ocfs2_extent_rec *rec = NULL;
Tristan Yee8aec062010-05-11 17:54:43 +08001715 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
Tristan Yec1631d42010-05-11 17:54:45 +08001716 u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc);
Mark Fasheh063c4562007-07-03 13:34:11 -07001717
Joel Becker5e404e92009-02-13 03:54:22 -08001718 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh);
Mark Fasheh063c4562007-07-03 13:34:11 -07001719 ocfs2_init_dealloc_ctxt(&dealloc);
1720
Tao Ma468eedd2011-02-22 22:14:41 +08001721 trace_ocfs2_remove_inode_range(
1722 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1723 (unsigned long long)byte_start,
1724 (unsigned long long)byte_len);
1725
Mark Fasheh063c4562007-07-03 13:34:11 -07001726 if (byte_len == 0)
1727 return 0;
1728
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001729 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1730 ret = ocfs2_truncate_inline(inode, di_bh, byte_start,
Mark Fashehb1967d02007-11-20 11:56:39 -08001731 byte_start + byte_len, 0);
1732 if (ret) {
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001733 mlog_errno(ret);
Mark Fashehb1967d02007-11-20 11:56:39 -08001734 goto out;
1735 }
1736 /*
1737 * There's no need to get fancy with the page cache
1738 * truncate of an inline-data inode. We're talking
1739 * about less than a page here, which will be cached
1740 * in the dinode buffer anyway.
1741 */
1742 unmap_mapping_range(mapping, 0, 0, 0);
1743 truncate_inode_pages(mapping, 0);
1744 goto out;
Mark Fasheh1afc32b2007-09-07 14:46:51 -07001745 }
1746
Tristan Yee8aec062010-05-11 17:54:43 +08001747 /*
1748 * For reflinks, we may need to CoW 2 clusters which might be
1749 * partially zero'd later, if hole's start and end offset were
1750 * within one cluster(means is not exactly aligned to clustersize).
1751 */
Mark Fasheh063c4562007-07-03 13:34:11 -07001752
Darrick J. Wong84e40082016-11-09 14:13:09 -08001753 if (ocfs2_is_refcount_inode(inode)) {
Tristan Yee8aec062010-05-11 17:54:43 +08001754 ret = ocfs2_cow_file_pos(inode, di_bh, byte_start);
1755 if (ret) {
1756 mlog_errno(ret);
1757 goto out;
1758 }
1759
1760 ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len);
1761 if (ret) {
1762 mlog_errno(ret);
1763 goto out;
1764 }
1765 }
1766
Mark Fasheh063c4562007-07-03 13:34:11 -07001767 trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
Tristan Yec1631d42010-05-11 17:54:45 +08001768 trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits;
1769 cluster_in_el = trunc_end;
Mark Fasheh063c4562007-07-03 13:34:11 -07001770
Mark Fasheh063c4562007-07-03 13:34:11 -07001771 ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len);
1772 if (ret) {
1773 mlog_errno(ret);
1774 goto out;
1775 }
1776
Tristan Yec1631d42010-05-11 17:54:45 +08001777 path = ocfs2_new_path_from_et(&et);
1778 if (!path) {
1779 ret = -ENOMEM;
1780 mlog_errno(ret);
1781 goto out;
1782 }
1783
1784 while (trunc_end > trunc_start) {
1785
1786 ret = ocfs2_find_path(INODE_CACHE(inode), path,
1787 cluster_in_el);
Mark Fasheh063c4562007-07-03 13:34:11 -07001788 if (ret) {
1789 mlog_errno(ret);
1790 goto out;
1791 }
1792
Tristan Yec1631d42010-05-11 17:54:45 +08001793 el = path_leaf_el(path);
Mark Fasheh063c4562007-07-03 13:34:11 -07001794
Tristan Yec1631d42010-05-11 17:54:45 +08001795 i = ocfs2_find_rec(el, trunc_end);
1796 /*
1797 * Need to go to previous extent block.
1798 */
1799 if (i < 0) {
1800 if (path->p_tree_depth == 0)
1801 break;
1802
1803 ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb,
1804 path,
1805 &cluster_in_el);
Mark Fasheh063c4562007-07-03 13:34:11 -07001806 if (ret) {
1807 mlog_errno(ret);
1808 goto out;
1809 }
Tristan Yec1631d42010-05-11 17:54:45 +08001810
1811 /*
1812 * We've reached the leftmost extent block,
1813 * it's safe to leave.
1814 */
1815 if (cluster_in_el == 0)
1816 break;
1817
1818 /*
1819 * The 'pos' searched for previous extent block is
1820 * always one cluster less than actual trunc_end.
1821 */
1822 trunc_end = cluster_in_el + 1;
1823
1824 ocfs2_reinit_path(path, 1);
1825
1826 continue;
1827
1828 } else
1829 rec = &el->l_recs[i];
1830
1831 ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos,
1832 &trunc_len, &trunc_end, &blkno, &done);
1833 if (done)
1834 break;
1835
1836 flags = rec->e_flags;
1837 phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno);
1838
1839 ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos,
1840 phys_cpos, trunc_len, flags,
Junxiao Bif62f12b2014-12-18 16:17:32 -08001841 &dealloc, refcount_loc, false);
Tristan Yec1631d42010-05-11 17:54:45 +08001842 if (ret < 0) {
1843 mlog_errno(ret);
1844 goto out;
Mark Fasheh063c4562007-07-03 13:34:11 -07001845 }
1846
Tristan Yec1631d42010-05-11 17:54:45 +08001847 cluster_in_el = trunc_end;
1848
1849 ocfs2_reinit_path(path, 1);
Mark Fasheh063c4562007-07-03 13:34:11 -07001850 }
1851
1852 ocfs2_truncate_cluster_pages(inode, byte_start, byte_len);
1853
1854out:
Younger Liu7aebff182013-09-11 14:19:59 -07001855 ocfs2_free_path(path);
Mark Fasheh063c4562007-07-03 13:34:11 -07001856 ocfs2_schedule_truncate_log_flush(osb, 1);
1857 ocfs2_run_deallocs(osb, &dealloc);
1858
1859 return ret;
1860}
1861
Mark Fashehb2580102007-03-09 16:53:21 -08001862/*
1863 * Parts of this function taken from xfs_change_file_space()
1864 */
Mark Fasheh385820a2007-07-19 00:14:38 -07001865static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
1866 loff_t f_pos, unsigned int cmd,
1867 struct ocfs2_space_resv *sr,
1868 int change_size)
Mark Fashehb2580102007-03-09 16:53:21 -08001869{
1870 int ret;
1871 s64 llen;
Mark Fasheh385820a2007-07-19 00:14:38 -07001872 loff_t size;
Mark Fashehb2580102007-03-09 16:53:21 -08001873 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1874 struct buffer_head *di_bh = NULL;
1875 handle_t *handle;
Mark Fasheha00cce32007-07-20 11:28:30 -07001876 unsigned long long max_off = inode->i_sb->s_maxbytes;
Mark Fashehb2580102007-03-09 16:53:21 -08001877
Mark Fashehb2580102007-03-09 16:53:21 -08001878 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
1879 return -EROFS;
1880
Al Viro59551022016-01-22 15:40:57 -05001881 inode_lock(inode);
Mark Fashehb2580102007-03-09 16:53:21 -08001882
1883 /*
1884 * This prevents concurrent writes on other nodes
1885 */
1886 ret = ocfs2_rw_lock(inode, 1);
1887 if (ret) {
1888 mlog_errno(ret);
1889 goto out;
1890 }
1891
Mark Fashehe63aecb62007-10-18 15:30:42 -07001892 ret = ocfs2_inode_lock(inode, &di_bh, 1);
Mark Fashehb2580102007-03-09 16:53:21 -08001893 if (ret) {
1894 mlog_errno(ret);
1895 goto out_rw_unlock;
1896 }
1897
1898 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
1899 ret = -EPERM;
Mark Fashehe63aecb62007-10-18 15:30:42 -07001900 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001901 }
1902
1903 switch (sr->l_whence) {
1904 case 0: /*SEEK_SET*/
1905 break;
1906 case 1: /*SEEK_CUR*/
Mark Fasheh385820a2007-07-19 00:14:38 -07001907 sr->l_start += f_pos;
Mark Fashehb2580102007-03-09 16:53:21 -08001908 break;
1909 case 2: /*SEEK_END*/
1910 sr->l_start += i_size_read(inode);
1911 break;
1912 default:
1913 ret = -EINVAL;
Mark Fashehe63aecb62007-10-18 15:30:42 -07001914 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001915 }
1916 sr->l_whence = 0;
1917
1918 llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len;
1919
1920 if (sr->l_start < 0
1921 || sr->l_start > max_off
1922 || (sr->l_start + llen) < 0
1923 || (sr->l_start + llen) > max_off) {
1924 ret = -EINVAL;
Mark Fashehe63aecb62007-10-18 15:30:42 -07001925 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001926 }
Mark Fasheh385820a2007-07-19 00:14:38 -07001927 size = sr->l_start + sr->l_len;
Mark Fashehb2580102007-03-09 16:53:21 -08001928
Tariq Saeeda2a3b392014-01-21 15:48:38 -08001929 if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64 ||
1930 cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) {
Mark Fashehb2580102007-03-09 16:53:21 -08001931 if (sr->l_len <= 0) {
1932 ret = -EINVAL;
Mark Fashehe63aecb62007-10-18 15:30:42 -07001933 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001934 }
1935 }
1936
Mark Fasheh385820a2007-07-19 00:14:38 -07001937 if (file && should_remove_suid(file->f_path.dentry)) {
Mark Fashehb2580102007-03-09 16:53:21 -08001938 ret = __ocfs2_write_remove_suid(inode, di_bh);
1939 if (ret) {
1940 mlog_errno(ret);
Mark Fashehe63aecb62007-10-18 15:30:42 -07001941 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001942 }
1943 }
1944
1945 down_write(&OCFS2_I(inode)->ip_alloc_sem);
1946 switch (cmd) {
1947 case OCFS2_IOC_RESVSP:
1948 case OCFS2_IOC_RESVSP64:
1949 /*
1950 * This takes unsigned offsets, but the signed ones we
1951 * pass have been checked against overflow above.
1952 */
1953 ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start,
1954 sr->l_len);
1955 break;
1956 case OCFS2_IOC_UNRESVSP:
1957 case OCFS2_IOC_UNRESVSP64:
1958 ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start,
1959 sr->l_len);
1960 break;
1961 default:
1962 ret = -EINVAL;
1963 }
1964 up_write(&OCFS2_I(inode)->ip_alloc_sem);
1965 if (ret) {
1966 mlog_errno(ret);
Mark Fashehe63aecb62007-10-18 15:30:42 -07001967 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001968 }
1969
1970 /*
1971 * We update c/mtime for these changes
1972 */
1973 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1974 if (IS_ERR(handle)) {
1975 ret = PTR_ERR(handle);
1976 mlog_errno(ret);
Mark Fashehe63aecb62007-10-18 15:30:42 -07001977 goto out_inode_unlock;
Mark Fashehb2580102007-03-09 16:53:21 -08001978 }
1979
Mark Fasheh385820a2007-07-19 00:14:38 -07001980 if (change_size && i_size_read(inode) < size)
1981 i_size_write(inode, size);
1982
Deepa Dinamani078cd822016-09-14 07:48:04 -07001983 inode->i_ctime = inode->i_mtime = current_time(inode);
Mark Fashehb2580102007-03-09 16:53:21 -08001984 ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
1985 if (ret < 0)
1986 mlog_errno(ret);
1987
Luis Henriquesa4e08d02012-07-11 14:02:10 -07001988 if (file && (file->f_flags & O_SYNC))
Mark Fashehdf295d4a2011-11-16 12:03:10 -08001989 handle->h_sync = 1;
1990
Mark Fashehb2580102007-03-09 16:53:21 -08001991 ocfs2_commit_trans(osb, handle);
1992
Mark Fashehe63aecb62007-10-18 15:30:42 -07001993out_inode_unlock:
Mark Fashehb2580102007-03-09 16:53:21 -08001994 brelse(di_bh);
Mark Fashehe63aecb62007-10-18 15:30:42 -07001995 ocfs2_inode_unlock(inode, 1);
Mark Fashehb2580102007-03-09 16:53:21 -08001996out_rw_unlock:
1997 ocfs2_rw_unlock(inode, 1);
1998
Mark Fashehb2580102007-03-09 16:53:21 -08001999out:
Al Viro59551022016-01-22 15:40:57 -05002000 inode_unlock(inode);
Mark Fashehb2580102007-03-09 16:53:21 -08002001 return ret;
2002}
2003
Mark Fasheh385820a2007-07-19 00:14:38 -07002004int ocfs2_change_file_space(struct file *file, unsigned int cmd,
2005 struct ocfs2_space_resv *sr)
2006{
Al Viro496ad9a2013-01-23 17:07:38 -05002007 struct inode *inode = file_inode(file);
Fernando Carrijoc19a28e2009-01-07 18:09:08 -08002008 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Jan Karafef69252012-06-12 16:20:40 +02002009 int ret;
Mark Fasheh385820a2007-07-19 00:14:38 -07002010
2011 if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
2012 !ocfs2_writes_unwritten_extents(osb))
2013 return -ENOTTY;
2014 else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&
2015 !ocfs2_sparse_alloc(osb))
2016 return -ENOTTY;
2017
2018 if (!S_ISREG(inode->i_mode))
2019 return -EINVAL;
2020
2021 if (!(file->f_mode & FMODE_WRITE))
2022 return -EBADF;
2023
Jan Karafef69252012-06-12 16:20:40 +02002024 ret = mnt_want_write_file(file);
2025 if (ret)
2026 return ret;
2027 ret = __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
2028 mnt_drop_write_file(file);
2029 return ret;
Mark Fasheh385820a2007-07-19 00:14:38 -07002030}
2031
Christoph Hellwig2fe17c12011-01-14 13:07:43 +01002032static long ocfs2_fallocate(struct file *file, int mode, loff_t offset,
Mark Fasheh385820a2007-07-19 00:14:38 -07002033 loff_t len)
2034{
Al Viro496ad9a2013-01-23 17:07:38 -05002035 struct inode *inode = file_inode(file);
Mark Fasheh385820a2007-07-19 00:14:38 -07002036 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2037 struct ocfs2_space_resv sr;
2038 int change_size = 1;
Josef Bacikdb47fef2010-11-17 20:46:17 -05002039 int cmd = OCFS2_IOC_RESVSP64;
Mark Fasheh385820a2007-07-19 00:14:38 -07002040
Christoph Hellwig64c23e82011-01-14 13:07:30 +01002041 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
2042 return -EOPNOTSUPP;
Mark Fasheh385820a2007-07-19 00:14:38 -07002043 if (!ocfs2_writes_unwritten_extents(osb))
2044 return -EOPNOTSUPP;
2045
Mark Fasheh385820a2007-07-19 00:14:38 -07002046 if (mode & FALLOC_FL_KEEP_SIZE)
2047 change_size = 0;
2048
Josef Bacikdb47fef2010-11-17 20:46:17 -05002049 if (mode & FALLOC_FL_PUNCH_HOLE)
2050 cmd = OCFS2_IOC_UNRESVSP64;
2051
Mark Fasheh385820a2007-07-19 00:14:38 -07002052 sr.l_whence = 0;
2053 sr.l_start = (s64)offset;
2054 sr.l_len = (s64)len;
2055
Josef Bacikdb47fef2010-11-17 20:46:17 -05002056 return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr,
2057 change_size);
Mark Fasheh385820a2007-07-19 00:14:38 -07002058}
2059
Tao Ma293b2f72009-08-25 08:02:48 +08002060int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos,
2061 size_t count)
2062{
2063 int ret = 0;
2064 unsigned int extent_flags;
2065 u32 cpos, clusters, extent_len, phys_cpos;
2066 struct super_block *sb = inode->i_sb;
2067
2068 if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) ||
Darrick J. Wong84e40082016-11-09 14:13:09 -08002069 !ocfs2_is_refcount_inode(inode) ||
Tao Ma2f48d592009-10-15 11:10:49 +08002070 OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
Tao Ma293b2f72009-08-25 08:02:48 +08002071 return 0;
2072
2073 cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits;
2074 clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
2075
2076 while (clusters) {
2077 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
2078 &extent_flags);
2079 if (ret < 0) {
2080 mlog_errno(ret);
2081 goto out;
2082 }
2083
2084 if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) {
2085 ret = 1;
2086 break;
2087 }
2088
2089 if (extent_len > clusters)
2090 extent_len = clusters;
2091
2092 clusters -= extent_len;
2093 cpos += extent_len;
2094 }
2095out:
2096 return ret;
2097}
2098
Mark Fasheha11f7e62011-06-22 14:23:38 -07002099static int ocfs2_is_io_unaligned(struct inode *inode, size_t count, loff_t pos)
2100{
2101 int blockmask = inode->i_sb->s_blocksize - 1;
2102 loff_t final_size = pos + count;
2103
2104 if ((pos & blockmask) || (final_size & blockmask))
2105 return 1;
2106 return 0;
2107}
2108
Tao Ma293b2f72009-08-25 08:02:48 +08002109static int ocfs2_prepare_inode_for_refcount(struct inode *inode,
Tao Mab8908232010-08-12 10:27:14 +08002110 struct file *file,
Tao Ma293b2f72009-08-25 08:02:48 +08002111 loff_t pos, size_t count,
2112 int *meta_level)
2113{
2114 int ret;
2115 struct buffer_head *di_bh = NULL;
2116 u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
2117 u32 clusters =
2118 ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos;
2119
2120 ret = ocfs2_inode_lock(inode, &di_bh, 1);
2121 if (ret) {
2122 mlog_errno(ret);
2123 goto out;
2124 }
2125
2126 *meta_level = 1;
2127
Tiger Yangc7dd3392013-08-13 16:00:58 -07002128 ret = ocfs2_refcount_cow(inode, di_bh, cpos, clusters, UINT_MAX);
Tao Ma293b2f72009-08-25 08:02:48 +08002129 if (ret)
2130 mlog_errno(ret);
2131out:
2132 brelse(di_bh);
2133 return ret;
2134}
2135
Tao Mab8908232010-08-12 10:27:14 +08002136static int ocfs2_prepare_inode_for_write(struct file *file,
Al Viro90320252015-04-09 11:14:45 -04002137 loff_t pos,
Ryan Dingf1f973f2016-03-25 14:21:12 -07002138 size_t count)
Mark Fashehccd979b2005-12-15 14:31:24 -08002139{
Mark Fasheh65ed39d2007-08-28 17:13:23 -07002140 int ret = 0, meta_level = 0;
Tao Mab8908232010-08-12 10:27:14 +08002141 struct dentry *dentry = file->f_path.dentry;
David Howells2b0143b2015-03-17 22:25:59 +00002142 struct inode *inode = d_inode(dentry);
Al Viro90320252015-04-09 11:14:45 -04002143 loff_t end;
Mark Fashehccd979b2005-12-15 14:31:24 -08002144
Sunil Mushran2bd63212010-01-25 16:57:38 -08002145 /*
Mark Fasheh65ed39d2007-08-28 17:13:23 -07002146 * We start with a read level meta lock and only jump to an ex
2147 * if we need to make modifications here.
Mark Fashehccd979b2005-12-15 14:31:24 -08002148 */
Mark Fashehccd979b2005-12-15 14:31:24 -08002149 for(;;) {
Mark Fashehe63aecb62007-10-18 15:30:42 -07002150 ret = ocfs2_inode_lock(inode, NULL, meta_level);
Mark Fashehccd979b2005-12-15 14:31:24 -08002151 if (ret < 0) {
2152 meta_level = -1;
2153 mlog_errno(ret);
2154 goto out;
2155 }
2156
2157 /* Clear suid / sgid if necessary. We do this here
2158 * instead of later in the write path because
2159 * remove_suid() calls ->setattr without any hint that
2160 * we may have already done our cluster locking. Since
2161 * ocfs2_setattr() *must* take cluster locks to
Justin P. Mattock42b2aa82011-11-28 20:31:00 -08002162 * proceed, this will lead us to recursively lock the
Mark Fashehccd979b2005-12-15 14:31:24 -08002163 * inode. There's also the dinode i_size state which
2164 * can be lost via setattr during extending writes (we
2165 * set inode->i_size at the end of a write. */
Tiger Yang8659ac22006-10-17 18:29:52 -07002166 if (should_remove_suid(dentry)) {
Mark Fashehccd979b2005-12-15 14:31:24 -08002167 if (meta_level == 0) {
Mark Fashehe63aecb62007-10-18 15:30:42 -07002168 ocfs2_inode_unlock(inode, meta_level);
Mark Fashehccd979b2005-12-15 14:31:24 -08002169 meta_level = 1;
2170 continue;
2171 }
2172
2173 ret = ocfs2_write_remove_suid(inode);
2174 if (ret < 0) {
2175 mlog_errno(ret);
Tiger Yang8659ac22006-10-17 18:29:52 -07002176 goto out_unlock;
Mark Fashehccd979b2005-12-15 14:31:24 -08002177 }
2178 }
2179
Al Viro90320252015-04-09 11:14:45 -04002180 end = pos + count;
Mark Fasheh3a0782d2007-01-17 12:53:31 -08002181
Al Viro90320252015-04-09 11:14:45 -04002182 ret = ocfs2_check_range_for_refcount(inode, pos, count);
Tao Ma293b2f72009-08-25 08:02:48 +08002183 if (ret == 1) {
2184 ocfs2_inode_unlock(inode, meta_level);
2185 meta_level = -1;
2186
2187 ret = ocfs2_prepare_inode_for_refcount(inode,
Tao Mab8908232010-08-12 10:27:14 +08002188 file,
Al Viro90320252015-04-09 11:14:45 -04002189 pos,
Tao Ma293b2f72009-08-25 08:02:48 +08002190 count,
2191 &meta_level);
2192 }
2193
2194 if (ret < 0) {
2195 mlog_errno(ret);
2196 goto out_unlock;
2197 }
2198
Mark Fashehccd979b2005-12-15 14:31:24 -08002199 break;
2200 }
2201
Tiger Yang8659ac22006-10-17 18:29:52 -07002202out_unlock:
Tao Ma468eedd2011-02-22 22:14:41 +08002203 trace_ocfs2_prepare_inode_for_write(OCFS2_I(inode)->ip_blkno,
Ryan Dingf1f973f2016-03-25 14:21:12 -07002204 pos, count);
Tao Ma468eedd2011-02-22 22:14:41 +08002205
Tao Ma293b2f72009-08-25 08:02:48 +08002206 if (meta_level >= 0)
2207 ocfs2_inode_unlock(inode, meta_level);
Tiger Yang8659ac22006-10-17 18:29:52 -07002208
2209out:
2210 return ret;
2211}
2212
Al Viro3ef045c2014-04-03 14:25:22 -04002213static ssize_t ocfs2_file_write_iter(struct kiocb *iocb,
2214 struct iov_iter *from)
Tiger Yang8659ac22006-10-17 18:29:52 -07002215{
Ryan Dingf1f973f2016-03-25 14:21:12 -07002216 int direct_io, rw_level;
Mark Fasheh9517bac2007-02-09 20:24:12 -08002217 ssize_t written = 0;
Al Viro3309dd02015-04-09 12:55:47 -04002218 ssize_t ret;
Ryan Dingf1f973f2016-03-25 14:21:12 -07002219 size_t count = iov_iter_count(from);
Mark Fasheh9517bac2007-02-09 20:24:12 -08002220 struct file *file = iocb->ki_filp;
Al Viro496ad9a2013-01-23 17:07:38 -05002221 struct inode *inode = file_inode(file);
Mark Fasheh9ea2d322007-10-18 14:14:45 -07002222 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Tristan Ye7bdb0d12010-10-11 16:46:39 +08002223 int full_coherency = !(osb->s_mount_opt &
2224 OCFS2_MOUNT_COHERENCY_BUFFERED);
Ryan Dinge63890f2016-03-25 14:21:15 -07002225 void *saved_ki_complete = NULL;
Joseph Qifaaebf12015-09-04 15:43:40 -07002226 int append_write = ((iocb->ki_pos + count) >=
2227 i_size_read(inode) ? 1 : 0);
Tiger Yang8659ac22006-10-17 18:29:52 -07002228
Tao Ma468eedd2011-02-22 22:14:41 +08002229 trace_ocfs2_file_aio_write(inode, file, file->f_path.dentry,
2230 (unsigned long long)OCFS2_I(inode)->ip_blkno,
2231 file->f_path.dentry->d_name.len,
2232 file->f_path.dentry->d_name.name,
Al Viro3ef045c2014-04-03 14:25:22 -04002233 (unsigned int)from->nr_segs); /* GRRRRR */
Tiger Yang8659ac22006-10-17 18:29:52 -07002234
Christoph Hellwig66ee59a2015-02-11 19:56:46 +01002235 if (count == 0)
Tiger Yang8659ac22006-10-17 18:29:52 -07002236 return 0;
2237
Al Viro2ba48ce2015-04-09 13:52:01 -04002238 direct_io = iocb->ki_flags & IOCB_DIRECT ? 1 : 0;
Mark Fasheh9517bac2007-02-09 20:24:12 -08002239
Al Viro59551022016-01-22 15:40:57 -05002240 inode_lock(inode);
Mark Fasheh9517bac2007-02-09 20:24:12 -08002241
Tristan Ye7bdb0d12010-10-11 16:46:39 +08002242 /*
2243 * Concurrent O_DIRECT writes are allowed with
2244 * mount_option "coherency=buffered".
Joseph Qifaaebf12015-09-04 15:43:40 -07002245 * For append write, we must take rw EX.
Tristan Ye7bdb0d12010-10-11 16:46:39 +08002246 */
Joseph Qifaaebf12015-09-04 15:43:40 -07002247 rw_level = (!direct_io || full_coherency || append_write);
Tristan Ye7bdb0d12010-10-11 16:46:39 +08002248
Tiger Yang8659ac22006-10-17 18:29:52 -07002249 ret = ocfs2_rw_lock(inode, rw_level);
2250 if (ret < 0) {
Mark Fasheh9517bac2007-02-09 20:24:12 -08002251 mlog_errno(ret);
WeiWei Wangfa5a0eb2015-06-24 16:55:15 -07002252 goto out_mutex;
Mark Fasheh9517bac2007-02-09 20:24:12 -08002253 }
2254
Tristan Ye7bdb0d12010-10-11 16:46:39 +08002255 /*
2256 * O_DIRECT writes with "coherency=full" need to take EX cluster
2257 * inode_lock to guarantee coherency.
2258 */
2259 if (direct_io && full_coherency) {
2260 /*
2261 * We need to take and drop the inode lock to force
2262 * other nodes to drop their caches. Buffered I/O
2263 * already does this in write_begin().
2264 */
2265 ret = ocfs2_inode_lock(inode, NULL, 1);
2266 if (ret < 0) {
2267 mlog_errno(ret);
Joseph Qiafe1bb72013-05-24 15:55:12 -07002268 goto out;
Tristan Ye7bdb0d12010-10-11 16:46:39 +08002269 }
2270
2271 ocfs2_inode_unlock(inode, 1);
2272 }
2273
Al Viro3309dd02015-04-09 12:55:47 -04002274 ret = generic_write_checks(iocb, from);
2275 if (ret <= 0) {
2276 if (ret)
2277 mlog_errno(ret);
Al Viro90320252015-04-09 11:14:45 -04002278 goto out;
2279 }
Al Viro3309dd02015-04-09 12:55:47 -04002280 count = ret;
Al Viro90320252015-04-09 11:14:45 -04002281
Ryan Dingf1f973f2016-03-25 14:21:12 -07002282 ret = ocfs2_prepare_inode_for_write(file, iocb->ki_pos, count);
Mark Fasheh9517bac2007-02-09 20:24:12 -08002283 if (ret < 0) {
Tiger Yang8659ac22006-10-17 18:29:52 -07002284 mlog_errno(ret);
2285 goto out;
2286 }
2287
Ryan Dinge63890f2016-03-25 14:21:15 -07002288 if (direct_io && !is_sync_kiocb(iocb) &&
2289 ocfs2_is_io_unaligned(inode, count, iocb->ki_pos)) {
Mark Fasheha11f7e62011-06-22 14:23:38 -07002290 /*
Ryan Dinge63890f2016-03-25 14:21:15 -07002291 * Make it a sync io if it's an unaligned aio.
Mark Fasheha11f7e62011-06-22 14:23:38 -07002292 */
Ryan Dinge63890f2016-03-25 14:21:15 -07002293 saved_ki_complete = xchg(&iocb->ki_complete, NULL);
Mark Fasheha11f7e62011-06-22 14:23:38 -07002294 }
2295
Mark Fashehccd979b2005-12-15 14:31:24 -08002296 /* communicate with ocfs2_dio_end_io */
Mark Fasheh7cdfc3a2007-04-16 17:28:51 -07002297 ocfs2_iocb_set_rw_locked(iocb, rw_level);
Mark Fashehccd979b2005-12-15 14:31:24 -08002298
Al Viro7da839c2015-04-09 14:01:33 -04002299 written = __generic_file_write_iter(iocb, from);
Mark Fashehccd979b2005-12-15 14:31:24 -08002300 /* buffered aio wouldn't have proper lock coverage today */
Al Viro7da839c2015-04-09 14:01:33 -04002301 BUG_ON(written == -EIOCBQUEUED && !(iocb->ki_flags & IOCB_DIRECT));
Mark Fashehccd979b2005-12-15 14:31:24 -08002302
Ryan Dingaa1057b2015-09-04 15:42:36 -07002303 /*
2304 * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
2305 * function pointer which is called when o_direct io completes so that
2306 * it can unlock our rw lock.
2307 * Unfortunately there are error cases which call end_io and others
2308 * that don't. so we don't have to unlock the rw_lock if either an
2309 * async dio is going to do it in the future or an end_io after an
2310 * error has already done it.
2311 */
2312 if ((written == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) {
2313 rw_level = -1;
Ryan Dingaa1057b2015-09-04 15:42:36 -07002314 }
2315
Al Viro64b4e252015-04-08 17:00:32 -04002316 if (unlikely(written <= 0))
Ryan Dinge63890f2016-03-25 14:21:15 -07002317 goto out;
Al Viro64b4e252015-04-08 17:00:32 -04002318
Al Viro7da839c2015-04-09 14:01:33 -04002319 if (((file->f_flags & O_DSYNC) && !direct_io) ||
Ryan Dingf1f973f2016-03-25 14:21:12 -07002320 IS_SYNC(inode)) {
Al Viro64b4e252015-04-08 17:00:32 -04002321 ret = filemap_fdatawrite_range(file->f_mapping,
2322 iocb->ki_pos - written,
2323 iocb->ki_pos - 1);
Jan Kara918941a2009-08-17 18:50:08 +02002324 if (ret < 0)
2325 written = ret;
2326
Goldwyn Rodrigues86b9c6f2014-12-10 15:41:53 -08002327 if (!ret) {
Joel Becker2b4e30f2008-09-03 20:03:41 -07002328 ret = jbd2_journal_force_commit(osb->journal->j_journal);
Mark Fasheh9ea2d322007-10-18 14:14:45 -07002329 if (ret < 0)
2330 written = ret;
2331 }
Jan Kara918941a2009-08-17 18:50:08 +02002332
2333 if (!ret)
Al Viro64b4e252015-04-08 17:00:32 -04002334 ret = filemap_fdatawait_range(file->f_mapping,
2335 iocb->ki_pos - written,
2336 iocb->ki_pos - 1);
Mark Fasheh9ea2d322007-10-18 14:14:45 -07002337 }
2338
Mark Fashehccd979b2005-12-15 14:31:24 -08002339out:
Ryan Dinge63890f2016-03-25 14:21:15 -07002340 if (saved_ki_complete)
2341 xchg(&iocb->ki_complete, saved_ki_complete);
2342
Mark Fasheh9517bac2007-02-09 20:24:12 -08002343 if (rw_level != -1)
2344 ocfs2_rw_unlock(inode, rw_level);
2345
WeiWei Wangfa5a0eb2015-06-24 16:55:15 -07002346out_mutex:
Al Viro59551022016-01-22 15:40:57 -05002347 inode_unlock(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08002348
Wengang Wang812e7a62009-07-10 13:26:04 +08002349 if (written)
2350 ret = written;
Wengang Wang812e7a62009-07-10 13:26:04 +08002351 return ret;
Mark Fashehccd979b2005-12-15 14:31:24 -08002352}
2353
Al Viro3cd9ad52014-04-02 14:44:18 -04002354static ssize_t ocfs2_file_read_iter(struct kiocb *iocb,
2355 struct iov_iter *to)
Mark Fashehccd979b2005-12-15 14:31:24 -08002356{
WeiWei Wangfa5a0eb2015-06-24 16:55:15 -07002357 int ret = 0, rw_level = -1, lock_level = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -08002358 struct file *filp = iocb->ki_filp;
Al Viro496ad9a2013-01-23 17:07:38 -05002359 struct inode *inode = file_inode(filp);
Mark Fashehccd979b2005-12-15 14:31:24 -08002360
Tao Ma468eedd2011-02-22 22:14:41 +08002361 trace_ocfs2_file_aio_read(inode, filp, filp->f_path.dentry,
2362 (unsigned long long)OCFS2_I(inode)->ip_blkno,
2363 filp->f_path.dentry->d_name.len,
Al Viro3cd9ad52014-04-02 14:44:18 -04002364 filp->f_path.dentry->d_name.name,
2365 to->nr_segs); /* GRRRRR */
Tao Ma468eedd2011-02-22 22:14:41 +08002366
Mark Fashehccd979b2005-12-15 14:31:24 -08002367
2368 if (!inode) {
2369 ret = -EINVAL;
2370 mlog_errno(ret);
2371 goto bail;
2372 }
2373
Sunil Mushran2bd63212010-01-25 16:57:38 -08002374 /*
Mark Fashehccd979b2005-12-15 14:31:24 -08002375 * buffered reads protect themselves in ->readpage(). O_DIRECT reads
2376 * need locks to protect pending reads from racing with truncate.
2377 */
Al Viro2ba48ce2015-04-09 13:52:01 -04002378 if (iocb->ki_flags & IOCB_DIRECT) {
Mark Fashehccd979b2005-12-15 14:31:24 -08002379 ret = ocfs2_rw_lock(inode, 0);
2380 if (ret < 0) {
2381 mlog_errno(ret);
2382 goto bail;
2383 }
2384 rw_level = 0;
2385 /* communicate with ocfs2_dio_end_io */
Mark Fasheh7cdfc3a2007-04-16 17:28:51 -07002386 ocfs2_iocb_set_rw_locked(iocb, rw_level);
Mark Fashehccd979b2005-12-15 14:31:24 -08002387 }
2388
Mark Fashehc4374f82006-05-05 19:04:35 -07002389 /*
2390 * We're fine letting folks race truncates and extending
2391 * writes with read across the cluster, just like they can
2392 * locally. Hence no rw_lock during read.
Sunil Mushran2bd63212010-01-25 16:57:38 -08002393 *
Mark Fashehc4374f82006-05-05 19:04:35 -07002394 * Take and drop the meta data lock to update inode fields
2395 * like i_size. This allows the checks down below
Sunil Mushran2bd63212010-01-25 16:57:38 -08002396 * generic_file_aio_read() a chance of actually working.
Mark Fashehc4374f82006-05-05 19:04:35 -07002397 */
Al Viro182be682013-01-24 02:21:54 -05002398 ret = ocfs2_inode_lock_atime(inode, filp->f_path.mnt, &lock_level);
Mark Fashehc4374f82006-05-05 19:04:35 -07002399 if (ret < 0) {
2400 mlog_errno(ret);
2401 goto bail;
2402 }
Mark Fashehe63aecb62007-10-18 15:30:42 -07002403 ocfs2_inode_unlock(inode, lock_level);
Mark Fashehc4374f82006-05-05 19:04:35 -07002404
Al Viro3cd9ad52014-04-02 14:44:18 -04002405 ret = generic_file_read_iter(iocb, to);
Tao Ma468eedd2011-02-22 22:14:41 +08002406 trace_generic_file_aio_read_ret(ret);
Mark Fashehccd979b2005-12-15 14:31:24 -08002407
2408 /* buffered aio wouldn't have proper lock coverage today */
Al Viro2ba48ce2015-04-09 13:52:01 -04002409 BUG_ON(ret == -EIOCBQUEUED && !(iocb->ki_flags & IOCB_DIRECT));
Mark Fashehccd979b2005-12-15 14:31:24 -08002410
Al Viro3ef045c2014-04-03 14:25:22 -04002411 /* see ocfs2_file_write_iter */
Mark Fashehccd979b2005-12-15 14:31:24 -08002412 if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
2413 rw_level = -1;
Mark Fashehccd979b2005-12-15 14:31:24 -08002414 }
2415
2416bail:
Sunil Mushran2bd63212010-01-25 16:57:38 -08002417 if (rw_level != -1)
Mark Fashehccd979b2005-12-15 14:31:24 -08002418 ocfs2_rw_unlock(inode, rw_level);
Mark Fashehccd979b2005-12-15 14:31:24 -08002419
2420 return ret;
2421}
2422
Sunil Mushran93862d52011-07-25 14:58:15 -07002423/* Refer generic_file_llseek_unlocked() */
Andrew Morton965c8e52012-12-17 15:59:39 -08002424static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int whence)
Sunil Mushran93862d52011-07-25 14:58:15 -07002425{
2426 struct inode *inode = file->f_mapping->host;
2427 int ret = 0;
2428
Al Viro59551022016-01-22 15:40:57 -05002429 inode_lock(inode);
Sunil Mushran93862d52011-07-25 14:58:15 -07002430
Andrew Morton965c8e52012-12-17 15:59:39 -08002431 switch (whence) {
Sunil Mushran93862d52011-07-25 14:58:15 -07002432 case SEEK_SET:
2433 break;
2434 case SEEK_END:
Jensenc8d888d2014-04-03 14:47:01 -07002435 /* SEEK_END requires the OCFS2 inode lock for the file
2436 * because it references the file's size.
2437 */
2438 ret = ocfs2_inode_lock(inode, NULL, 0);
2439 if (ret < 0) {
2440 mlog_errno(ret);
2441 goto out;
2442 }
2443 offset += i_size_read(inode);
2444 ocfs2_inode_unlock(inode, 0);
Sunil Mushran93862d52011-07-25 14:58:15 -07002445 break;
2446 case SEEK_CUR:
2447 if (offset == 0) {
2448 offset = file->f_pos;
2449 goto out;
2450 }
2451 offset += file->f_pos;
2452 break;
2453 case SEEK_DATA:
2454 case SEEK_HOLE:
Andrew Morton965c8e52012-12-17 15:59:39 -08002455 ret = ocfs2_seek_data_hole_offset(file, &offset, whence);
Sunil Mushran93862d52011-07-25 14:58:15 -07002456 if (ret)
2457 goto out;
2458 break;
2459 default:
2460 ret = -EINVAL;
2461 goto out;
2462 }
2463
Jie Liu46a1c2c2013-06-25 12:02:13 +08002464 offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
Sunil Mushran93862d52011-07-25 14:58:15 -07002465
2466out:
Al Viro59551022016-01-22 15:40:57 -05002467 inode_unlock(inode);
Sunil Mushran93862d52011-07-25 14:58:15 -07002468 if (ret)
2469 return ret;
2470 return offset;
2471}
2472
Darrick J. Wong29ac8e82016-11-09 14:13:11 -08002473static int ocfs2_file_clone_range(struct file *file_in,
2474 loff_t pos_in,
2475 struct file *file_out,
2476 loff_t pos_out,
2477 u64 len)
2478{
2479 return ocfs2_reflink_remap_range(file_in, pos_in, file_out, pos_out,
2480 len, false);
2481}
2482
2483static ssize_t ocfs2_file_dedupe_range(struct file *src_file,
2484 u64 loff,
2485 u64 len,
2486 struct file *dst_file,
2487 u64 dst_loff)
2488{
2489 int error;
2490
2491 error = ocfs2_reflink_remap_range(src_file, loff, dst_file, dst_loff,
2492 len, true);
2493 if (error)
2494 return error;
2495 return len;
2496}
2497
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08002498const struct inode_operations ocfs2_file_iops = {
Mark Fashehccd979b2005-12-15 14:31:24 -08002499 .setattr = ocfs2_setattr,
2500 .getattr = ocfs2_getattr,
Tiger Yangd38eb8d2006-11-27 09:59:21 +08002501 .permission = ocfs2_permission,
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002502 .listxattr = ocfs2_listxattr,
Mark Fasheh00dc4172008-10-03 17:32:11 -04002503 .fiemap = ocfs2_fiemap,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02002504 .get_acl = ocfs2_iop_get_acl,
Christoph Hellwig702e5bc2013-12-20 05:16:48 -08002505 .set_acl = ocfs2_iop_set_acl,
Mark Fashehccd979b2005-12-15 14:31:24 -08002506};
2507
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08002508const struct inode_operations ocfs2_special_file_iops = {
Mark Fashehccd979b2005-12-15 14:31:24 -08002509 .setattr = ocfs2_setattr,
2510 .getattr = ocfs2_getattr,
Tiger Yangd38eb8d2006-11-27 09:59:21 +08002511 .permission = ocfs2_permission,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02002512 .get_acl = ocfs2_iop_get_acl,
Christoph Hellwig702e5bc2013-12-20 05:16:48 -08002513 .set_acl = ocfs2_iop_set_acl,
Mark Fashehccd979b2005-12-15 14:31:24 -08002514};
2515
Mark Fasheh53da4932008-07-21 14:29:16 -07002516/*
2517 * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with
2518 * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks!
2519 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -08002520const struct file_operations ocfs2_fops = {
Sunil Mushran93862d52011-07-25 14:58:15 -07002521 .llseek = ocfs2_file_llseek,
Mark Fashehccd979b2005-12-15 14:31:24 -08002522 .mmap = ocfs2_mmap,
2523 .fsync = ocfs2_sync_file,
2524 .release = ocfs2_file_release,
2525 .open = ocfs2_file_open,
Al Viro3cd9ad52014-04-02 14:44:18 -04002526 .read_iter = ocfs2_file_read_iter,
Al Viro3ef045c2014-04-03 14:25:22 -04002527 .write_iter = ocfs2_file_write_iter,
Andi Kleenc9ec1482008-01-27 03:17:17 +01002528 .unlocked_ioctl = ocfs2_ioctl,
Mark Fasheh586d2322007-03-09 15:56:28 -08002529#ifdef CONFIG_COMPAT
2530 .compat_ioctl = ocfs2_compat_ioctl,
2531#endif
Mark Fasheh53da4932008-07-21 14:29:16 -07002532 .lock = ocfs2_lock,
2533 .flock = ocfs2_flock,
Al Viro82c156f2016-09-22 23:35:42 -04002534 .splice_read = generic_file_splice_read,
Al Viro6dc8bc02014-04-05 04:34:23 -04002535 .splice_write = iter_file_splice_write,
Christoph Hellwig2fe17c12011-01-14 13:07:43 +01002536 .fallocate = ocfs2_fallocate,
Darrick J. Wong29ac8e82016-11-09 14:13:11 -08002537 .clone_file_range = ocfs2_file_clone_range,
2538 .dedupe_file_range = ocfs2_file_dedupe_range,
Mark Fasheh53da4932008-07-21 14:29:16 -07002539};
2540
2541const struct file_operations ocfs2_dops = {
2542 .llseek = generic_file_llseek,
2543 .read = generic_read_dir,
Al Viro3704412b2013-05-22 21:06:00 -04002544 .iterate = ocfs2_readdir,
Mark Fasheh53da4932008-07-21 14:29:16 -07002545 .fsync = ocfs2_sync_file,
2546 .release = ocfs2_dir_release,
2547 .open = ocfs2_dir_open,
2548 .unlocked_ioctl = ocfs2_ioctl,
2549#ifdef CONFIG_COMPAT
2550 .compat_ioctl = ocfs2_compat_ioctl,
2551#endif
2552 .lock = ocfs2_lock,
2553 .flock = ocfs2_flock,
2554};
2555
2556/*
2557 * POSIX-lockless variants of our file_operations.
2558 *
2559 * These will be used if the underlying cluster stack does not support
2560 * posix file locking, if the user passes the "localflocks" mount
2561 * option, or if we have a local-only fs.
2562 *
2563 * ocfs2_flock is in here because all stacks handle UNIX file locks,
2564 * so we still want it in the case of no stack support for
2565 * plocks. Internally, it will do the right thing when asked to ignore
2566 * the cluster.
2567 */
2568const struct file_operations ocfs2_fops_no_plocks = {
Sunil Mushran93862d52011-07-25 14:58:15 -07002569 .llseek = ocfs2_file_llseek,
Mark Fasheh53da4932008-07-21 14:29:16 -07002570 .mmap = ocfs2_mmap,
2571 .fsync = ocfs2_sync_file,
2572 .release = ocfs2_file_release,
2573 .open = ocfs2_file_open,
Al Viro3cd9ad52014-04-02 14:44:18 -04002574 .read_iter = ocfs2_file_read_iter,
Al Viro3ef045c2014-04-03 14:25:22 -04002575 .write_iter = ocfs2_file_write_iter,
Mark Fasheh53da4932008-07-21 14:29:16 -07002576 .unlocked_ioctl = ocfs2_ioctl,
2577#ifdef CONFIG_COMPAT
2578 .compat_ioctl = ocfs2_compat_ioctl,
2579#endif
Mark Fasheh53fc6222007-12-20 16:49:04 -08002580 .flock = ocfs2_flock,
Al Viro82c156f2016-09-22 23:35:42 -04002581 .splice_read = generic_file_splice_read,
Al Viro6dc8bc02014-04-05 04:34:23 -04002582 .splice_write = iter_file_splice_write,
Tristan Ye3d1c1822011-05-23 15:57:26 +08002583 .fallocate = ocfs2_fallocate,
Darrick J. Wong29ac8e82016-11-09 14:13:11 -08002584 .clone_file_range = ocfs2_file_clone_range,
2585 .dedupe_file_range = ocfs2_file_dedupe_range,
Mark Fashehccd979b2005-12-15 14:31:24 -08002586};
2587
Mark Fasheh53da4932008-07-21 14:29:16 -07002588const struct file_operations ocfs2_dops_no_plocks = {
Jan Kara32c3c0e2007-12-19 15:24:52 +01002589 .llseek = generic_file_llseek,
Mark Fashehccd979b2005-12-15 14:31:24 -08002590 .read = generic_read_dir,
Al Viro3704412b2013-05-22 21:06:00 -04002591 .iterate = ocfs2_readdir,
Mark Fashehccd979b2005-12-15 14:31:24 -08002592 .fsync = ocfs2_sync_file,
Mark Fasheh53fc6222007-12-20 16:49:04 -08002593 .release = ocfs2_dir_release,
2594 .open = ocfs2_dir_open,
Andi Kleenc9ec1482008-01-27 03:17:17 +01002595 .unlocked_ioctl = ocfs2_ioctl,
Mark Fasheh586d2322007-03-09 15:56:28 -08002596#ifdef CONFIG_COMPAT
2597 .compat_ioctl = ocfs2_compat_ioctl,
2598#endif
Mark Fasheh53fc6222007-12-20 16:49:04 -08002599 .flock = ocfs2_flock,
Mark Fashehccd979b2005-12-15 14:31:24 -08002600};