blob: 9a08e1bd6fbddf74daf4f0ac0b8b326f10485f65 [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Bob Petersoncf45b752008-01-31 10:31:39 -06003 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00004 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04007 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +00008 */
9
10#include <linux/sched.h>
11#include <linux/slab.h>
12#include <linux/spinlock.h>
13#include <linux/completion.h>
14#include <linux/buffer_head.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000015#include <linux/blkdev.h>
16#include <linux/kthread.h>
Abhijith Das86384602006-08-25 11:13:37 -050017#include <linux/namei.h>
18#include <linux/mount.h>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050019#include <linux/gfs2_ondisk.h>
Steven Whitehousecc632e72009-09-15 09:59:02 +010020#include <linux/quotaops.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000021
22#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050023#include "incore.h"
Bob Petersonda6dd402007-12-11 18:49:21 -060024#include "bmap.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000025#include "glock.h"
26#include "glops.h"
27#include "inode.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000028#include "recovery.h"
29#include "rgrp.h"
30#include "super.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000031#include "sys.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050032#include "util.h"
Steven Whitehousebb3b0e32007-08-16 16:03:57 +010033#include "log.h"
Steven Whitehouse9ac1b4d2008-11-19 10:08:22 +000034#include "quota.h"
Steven Whitehouseb5289682008-11-26 12:49:26 +000035#include "dir.h"
Steven Whitehouse63997772009-06-12 08:49:20 +010036#include "trace_gfs2.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000037
38#define DO 0
39#define UNDO 1
40
Steven Whitehouse9b8df982008-08-08 13:45:13 +010041static const u32 gfs2_old_fs_formats[] = {
42 0
43};
44
45static const u32 gfs2_old_multihost_formats[] = {
46 0
47};
48
49/**
50 * gfs2_tune_init - Fill a gfs2_tune structure with default values
51 * @gt: tune
52 *
53 */
54
55static void gfs2_tune_init(struct gfs2_tune *gt)
56{
57 spin_lock_init(&gt->gt_spin);
58
Steven Whitehouse9b8df982008-08-08 13:45:13 +010059 gt->gt_quota_simul_sync = 64;
60 gt->gt_quota_warn_period = 10;
61 gt->gt_quota_scale_num = 1;
62 gt->gt_quota_scale_den = 1;
Steven Whitehouse9b8df982008-08-08 13:45:13 +010063 gt->gt_new_files_jdata = 0;
64 gt->gt_max_readahead = 1 << 18;
Steven Whitehouse9b8df982008-08-08 13:45:13 +010065 gt->gt_complain_secs = 10;
Steven Whitehouse9b8df982008-08-08 13:45:13 +010066}
67
David Teiglandb3b94fa2006-01-16 16:50:04 +000068static struct gfs2_sbd *init_sbd(struct super_block *sb)
69{
70 struct gfs2_sbd *sdp;
David Teiglandb3b94fa2006-01-16 16:50:04 +000071
Steven Whitehouse85d1da62006-09-07 14:40:21 -040072 sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
David Teiglandb3b94fa2006-01-16 16:50:04 +000073 if (!sdp)
74 return NULL;
75
Steven Whitehouse5c676f62006-02-27 17:23:27 -050076 sb->s_fs_info = sdp;
David Teiglandb3b94fa2006-01-16 16:50:04 +000077 sdp->sd_vfs = sb;
78
79 gfs2_tune_init(&sdp->sd_tune);
80
Steven Whitehousee4027462010-01-25 11:20:19 +000081 init_waitqueue_head(&sdp->sd_glock_wait);
82 atomic_set(&sdp->sd_glock_disposal, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +000083 spin_lock_init(&sdp->sd_statfs_spin);
David Teiglandb3b94fa2006-01-16 16:50:04 +000084
85 spin_lock_init(&sdp->sd_rindex_spin);
Steven Whitehousef55ab262006-02-21 12:51:39 +000086 mutex_init(&sdp->sd_rindex_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +000087 INIT_LIST_HEAD(&sdp->sd_rindex_list);
88 INIT_LIST_HEAD(&sdp->sd_rindex_mru_list);
David Teiglandb3b94fa2006-01-16 16:50:04 +000089
90 INIT_LIST_HEAD(&sdp->sd_jindex_list);
91 spin_lock_init(&sdp->sd_jindex_spin);
Steven Whitehousef55ab262006-02-21 12:51:39 +000092 mutex_init(&sdp->sd_jindex_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +000093
David Teiglandb3b94fa2006-01-16 16:50:04 +000094 INIT_LIST_HEAD(&sdp->sd_quota_list);
Steven Whitehousef55ab262006-02-21 12:51:39 +000095 mutex_init(&sdp->sd_quota_mutex);
Steven Whitehouse37b2c832008-11-17 14:25:37 +000096 init_waitqueue_head(&sdp->sd_quota_wait);
Steven Whitehouse813e0c42008-11-18 13:38:48 +000097 INIT_LIST_HEAD(&sdp->sd_trunc_list);
98 spin_lock_init(&sdp->sd_trunc_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +000099
100 spin_lock_init(&sdp->sd_log_lock);
Benjamin Marzinski5e687ea2010-05-04 14:29:16 -0500101 atomic_set(&sdp->sd_log_pinned, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000102 INIT_LIST_HEAD(&sdp->sd_log_le_buf);
103 INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
104 INIT_LIST_HEAD(&sdp->sd_log_le_rg);
105 INIT_LIST_HEAD(&sdp->sd_log_le_databuf);
Steven Whitehoused7b616e2007-09-02 10:48:13 +0100106 INIT_LIST_HEAD(&sdp->sd_log_le_ordered);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000107
Benjamin Marzinski5e687ea2010-05-04 14:29:16 -0500108 init_waitqueue_head(&sdp->sd_log_waitq);
109 init_waitqueue_head(&sdp->sd_logd_waitq);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000110 INIT_LIST_HEAD(&sdp->sd_ail1_list);
111 INIT_LIST_HEAD(&sdp->sd_ail2_list);
112
Steven Whitehouse484adff2006-03-29 09:12:12 -0500113 init_rwsem(&sdp->sd_log_flush_lock);
Steven Whitehouse16615be2007-09-17 10:59:52 +0100114 atomic_set(&sdp->sd_log_in_flight, 0);
115 init_waitqueue_head(&sdp->sd_log_flush_wait);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000116
117 INIT_LIST_HEAD(&sdp->sd_revoke_list);
118
Steven Whitehousef55ab262006-02-21 12:51:39 +0000119 mutex_init(&sdp->sd_freeze_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000120
121 return sdp;
122}
123
David Teiglandb3b94fa2006-01-16 16:50:04 +0000124
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100125/**
126 * gfs2_check_sb - Check superblock
127 * @sdp: the filesystem
128 * @sb: The superblock
129 * @silent: Don't print a message if the check fails
130 *
131 * Checks the version code of the FS is one that we understand how to
132 * read and that the sizes of the various on-disk structures have not
133 * changed.
134 */
135
136static int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent)
137{
138 unsigned int x;
139
140 if (sb->sb_magic != GFS2_MAGIC ||
141 sb->sb_type != GFS2_METATYPE_SB) {
142 if (!silent)
143 printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n");
144 return -EINVAL;
145 }
146
147 /* If format numbers match exactly, we're done. */
148
149 if (sb->sb_fs_format == GFS2_FORMAT_FS &&
150 sb->sb_multihost_format == GFS2_FORMAT_MULTI)
151 return 0;
152
153 if (sb->sb_fs_format != GFS2_FORMAT_FS) {
154 for (x = 0; gfs2_old_fs_formats[x]; x++)
155 if (gfs2_old_fs_formats[x] == sb->sb_fs_format)
156 break;
157
158 if (!gfs2_old_fs_formats[x]) {
159 printk(KERN_WARNING
160 "GFS2: code version (%u, %u) is incompatible "
161 "with ondisk format (%u, %u)\n",
162 GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
163 sb->sb_fs_format, sb->sb_multihost_format);
164 printk(KERN_WARNING
165 "GFS2: I don't know how to upgrade this FS\n");
166 return -EINVAL;
167 }
168 }
169
170 if (sb->sb_multihost_format != GFS2_FORMAT_MULTI) {
171 for (x = 0; gfs2_old_multihost_formats[x]; x++)
172 if (gfs2_old_multihost_formats[x] ==
173 sb->sb_multihost_format)
174 break;
175
176 if (!gfs2_old_multihost_formats[x]) {
177 printk(KERN_WARNING
178 "GFS2: code version (%u, %u) is incompatible "
179 "with ondisk format (%u, %u)\n",
180 GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
181 sb->sb_fs_format, sb->sb_multihost_format);
182 printk(KERN_WARNING
183 "GFS2: I don't know how to upgrade this FS\n");
184 return -EINVAL;
185 }
186 }
187
188 if (!sdp->sd_args.ar_upgrade) {
189 printk(KERN_WARNING
190 "GFS2: code version (%u, %u) is incompatible "
191 "with ondisk format (%u, %u)\n",
192 GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
193 sb->sb_fs_format, sb->sb_multihost_format);
194 printk(KERN_INFO
195 "GFS2: Use the \"upgrade\" mount option to upgrade "
196 "the FS\n");
197 printk(KERN_INFO "GFS2: See the manual for more details\n");
198 return -EINVAL;
199 }
200
201 return 0;
202}
203
204static void end_bio_io_page(struct bio *bio, int error)
205{
206 struct page *page = bio->bi_private;
207
208 if (!error)
209 SetPageUptodate(page);
210 else
211 printk(KERN_WARNING "gfs2: error %d reading superblock\n", error);
212 unlock_page(page);
213}
214
215static void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
216{
217 const struct gfs2_sb *str = buf;
218
219 sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic);
220 sb->sb_type = be32_to_cpu(str->sb_header.mh_type);
221 sb->sb_format = be32_to_cpu(str->sb_header.mh_format);
222 sb->sb_fs_format = be32_to_cpu(str->sb_fs_format);
223 sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format);
224 sb->sb_bsize = be32_to_cpu(str->sb_bsize);
225 sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift);
226 sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr);
227 sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino);
228 sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr);
229 sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino);
230
231 memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
232 memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
Steven Whitehouse02e3cc72009-02-10 13:48:30 +0000233 memcpy(sb->sb_uuid, str->sb_uuid, 16);
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100234}
235
236/**
237 * gfs2_read_super - Read the gfs2 super block from disk
238 * @sdp: The GFS2 super block
239 * @sector: The location of the super block
240 * @error: The error code to return
241 *
242 * This uses the bio functions to read the super block from disk
243 * because we want to be 100% sure that we never read cached data.
244 * A super block is read twice only during each GFS2 mount and is
245 * never written to by the filesystem. The first time its read no
246 * locks are held, and the only details which are looked at are those
247 * relating to the locking protocol. Once locking is up and working,
248 * the sb is read again under the lock to establish the location of
249 * the master directory (contains pointers to journals etc) and the
250 * root directory.
251 *
252 * Returns: 0 on success or error
253 */
254
255static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
256{
257 struct super_block *sb = sdp->sd_vfs;
258 struct gfs2_sb *p;
259 struct page *page;
260 struct bio *bio;
261
262 page = alloc_page(GFP_NOFS);
263 if (unlikely(!page))
264 return -ENOBUFS;
265
266 ClearPageUptodate(page);
267 ClearPageDirty(page);
268 lock_page(page);
269
270 bio = bio_alloc(GFP_NOFS, 1);
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100271 bio->bi_sector = sector * (sb->s_blocksize >> 9);
272 bio->bi_bdev = sb->s_bdev;
273 bio_add_page(bio, page, PAGE_SIZE, 0);
274
275 bio->bi_end_io = end_bio_io_page;
276 bio->bi_private = page;
277 submit_bio(READ_SYNC | (1 << BIO_RW_META), bio);
278 wait_on_page_locked(page);
279 bio_put(bio);
280 if (!PageUptodate(page)) {
281 __free_page(page);
282 return -EIO;
283 }
284 p = kmap(page);
285 gfs2_sb_in(&sdp->sd_sb, p);
286 kunmap(page);
287 __free_page(page);
288 return 0;
289}
Steven Whitehouse6bac2432009-03-09 09:03:51 +0000290
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100291/**
292 * gfs2_read_sb - Read super block
293 * @sdp: The GFS2 superblock
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100294 * @silent: Don't print message if mount fails
295 *
296 */
297
Steven Whitehouse6bac2432009-03-09 09:03:51 +0000298static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent)
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100299{
300 u32 hash_blocks, ind_blocks, leaf_blocks;
301 u32 tmp_blocks;
302 unsigned int x;
303 int error;
304
305 error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
306 if (error) {
307 if (!silent)
308 fs_err(sdp, "can't read superblock\n");
309 return error;
310 }
311
312 error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
313 if (error)
314 return error;
315
316 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
317 GFS2_BASIC_BLOCK_SHIFT;
318 sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
319 sdp->sd_diptrs = (sdp->sd_sb.sb_bsize -
320 sizeof(struct gfs2_dinode)) / sizeof(u64);
321 sdp->sd_inptrs = (sdp->sd_sb.sb_bsize -
322 sizeof(struct gfs2_meta_header)) / sizeof(u64);
323 sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header);
324 sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2;
325 sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1;
326 sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64);
327 sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize -
328 sizeof(struct gfs2_meta_header)) /
329 sizeof(struct gfs2_quota_change);
330
331 /* Compute maximum reservation required to add a entry to a directory */
332
333 hash_blocks = DIV_ROUND_UP(sizeof(u64) * (1 << GFS2_DIR_MAX_DEPTH),
334 sdp->sd_jbsize);
335
336 ind_blocks = 0;
337 for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) {
338 tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs);
339 ind_blocks += tmp_blocks;
340 }
341
342 leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH;
343
344 sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks;
345
346 sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize -
347 sizeof(struct gfs2_dinode);
348 sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs;
349 for (x = 2;; x++) {
350 u64 space, d;
351 u32 m;
352
353 space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs;
354 d = space;
355 m = do_div(d, sdp->sd_inptrs);
356
357 if (d != sdp->sd_heightsize[x - 1] || m)
358 break;
359 sdp->sd_heightsize[x] = space;
360 }
361 sdp->sd_max_height = x;
362 sdp->sd_heightsize[x] = ~0;
363 gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
364
365 sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize -
366 sizeof(struct gfs2_dinode);
367 sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs;
368 for (x = 2;; x++) {
369 u64 space, d;
370 u32 m;
371
372 space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs;
373 d = space;
374 m = do_div(d, sdp->sd_inptrs);
375
376 if (d != sdp->sd_jheightsize[x - 1] || m)
377 break;
378 sdp->sd_jheightsize[x] = space;
379 }
380 sdp->sd_max_jheight = x;
381 sdp->sd_jheightsize[x] = ~0;
382 gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT);
383
384 return 0;
385}
386
David Teiglandb3b94fa2006-01-16 16:50:04 +0000387static int init_names(struct gfs2_sbd *sdp, int silent)
388{
David Teiglandb3b94fa2006-01-16 16:50:04 +0000389 char *proto, *table;
390 int error = 0;
391
392 proto = sdp->sd_args.ar_lockproto;
393 table = sdp->sd_args.ar_locktable;
394
395 /* Try to autodetect */
396
397 if (!proto[0] || !table[0]) {
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100398 error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
399 if (error)
400 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000401
Steven Whitehouse3cf1e7b2006-10-02 11:49:41 -0400402 error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000403 if (error)
404 goto out;
405
406 if (!proto[0])
Steven Whitehouse3cf1e7b2006-10-02 11:49:41 -0400407 proto = sdp->sd_sb.sb_lockproto;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000408 if (!table[0])
Steven Whitehouse3cf1e7b2006-10-02 11:49:41 -0400409 table = sdp->sd_sb.sb_locktable;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000410 }
411
412 if (!table[0])
413 table = sdp->sd_vfs->s_id;
414
Jean Delvare00377d82008-05-09 17:59:51 +0200415 strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN);
416 strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000417
Denis Cheng5d35e312007-08-13 11:01:58 +0800418 table = sdp->sd_table_name;
419 while ((table = strchr(table, '/')))
Robert Petersonb35997d2007-06-07 09:10:01 -0500420 *table = '_';
421
Steven Whitehousea91ea692006-09-04 12:04:26 -0400422out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000423 return error;
424}
425
426static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
427 int undo)
428{
David Teiglandb3b94fa2006-01-16 16:50:04 +0000429 int error = 0;
430
431 if (undo)
432 goto fail_trans;
433
David Teiglandb3b94fa2006-01-16 16:50:04 +0000434 error = gfs2_glock_nq_num(sdp,
435 GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
436 LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
437 mount_gh);
438 if (error) {
439 fs_err(sdp, "can't acquire mount glock: %d\n", error);
440 goto fail;
441 }
442
443 error = gfs2_glock_nq_num(sdp,
444 GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
445 LM_ST_SHARED,
Steven Whitehouse579b78a2006-04-26 14:58:26 -0400446 LM_FLAG_NOEXP | GL_EXACT,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000447 &sdp->sd_live_gh);
448 if (error) {
449 fs_err(sdp, "can't acquire live glock: %d\n", error);
450 goto fail_mount;
451 }
452
453 error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
454 CREATE, &sdp->sd_rename_gl);
455 if (error) {
456 fs_err(sdp, "can't create rename glock: %d\n", error);
457 goto fail_live;
458 }
459
460 error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
461 CREATE, &sdp->sd_trans_gl);
462 if (error) {
463 fs_err(sdp, "can't create transaction glock: %d\n", error);
464 goto fail_rename;
465 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000466
467 return 0;
468
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400469fail_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000470 gfs2_glock_put(sdp->sd_trans_gl);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400471fail_rename:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000472 gfs2_glock_put(sdp->sd_rename_gl);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400473fail_live:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000474 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400475fail_mount:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000476 gfs2_glock_dq_uninit(mount_gh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400477fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000478 return error;
479}
480
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100481static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr,
482 u64 no_addr, const char *name)
Steven Whitehousef42faf42006-01-30 18:34:10 +0000483{
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100484 struct gfs2_sbd *sdp = sb->s_fs_info;
485 struct dentry *dentry;
486 struct inode *inode;
487
Bob Peterson1a0eae82010-04-14 11:58:16 -0400488 inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0);
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100489 if (IS_ERR(inode)) {
490 fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
491 return PTR_ERR(inode);
492 }
493 dentry = d_alloc_root(inode);
494 if (!dentry) {
495 fs_err(sdp, "can't alloc %s dentry\n", name);
496 iput(inode);
497 return -ENOMEM;
498 }
499 dentry->d_op = &gfs2_dops;
500 *dptr = dentry;
501 return 0;
Steven Whitehousef42faf42006-01-30 18:34:10 +0000502}
503
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100504static int init_sb(struct gfs2_sbd *sdp, int silent)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000505{
506 struct super_block *sb = sdp->sd_vfs;
507 struct gfs2_holder sb_gh;
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100508 u64 no_addr;
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100509 int ret;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000510
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100511 ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
512 LM_ST_SHARED, 0, &sb_gh);
513 if (ret) {
514 fs_err(sdp, "can't acquire superblock glock: %d\n", ret);
515 return ret;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000516 }
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400517
Steven Whitehouse6bac2432009-03-09 09:03:51 +0000518 ret = gfs2_read_sb(sdp, silent);
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100519 if (ret) {
520 fs_err(sdp, "can't read superblock: %d\n", ret);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000521 goto out;
522 }
523
524 /* Set up the buffer cache and SB for real */
Martin K. Petersene1defc42009-05-22 17:17:49 -0400525 if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) {
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100526 ret = -EINVAL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000527 fs_err(sdp, "FS block size (%u) is too small for device "
528 "block size (%u)\n",
Martin K. Petersene1defc42009-05-22 17:17:49 -0400529 sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000530 goto out;
531 }
532 if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100533 ret = -EINVAL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000534 fs_err(sdp, "FS block size (%u) is too big for machine "
535 "page size (%u)\n",
536 sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
537 goto out;
538 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000539 sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
540
Steven Whitehousef42faf42006-01-30 18:34:10 +0000541 /* Get the root inode */
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100542 no_addr = sdp->sd_sb.sb_root_dir.no_addr;
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100543 ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root");
544 if (ret)
545 goto out;
546
547 /* Get the master inode */
548 no_addr = sdp->sd_sb.sb_master_dir.no_addr;
549 ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master");
550 if (ret) {
551 dput(sdp->sd_root_dir);
Steven Whitehousef42faf42006-01-30 18:34:10 +0000552 goto out;
553 }
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100554 sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir);
Steven Whitehousef42faf42006-01-30 18:34:10 +0000555out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000556 gfs2_glock_dq_uninit(&sb_gh);
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100557 return ret;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000558}
559
Bob Petersonda6dd402007-12-11 18:49:21 -0600560/**
561 * map_journal_extents - create a reusable "extent" mapping from all logical
562 * blocks to all physical blocks for the given journal. This will save
563 * us time when writing journal blocks. Most journals will have only one
564 * extent that maps all their logical blocks. That's because gfs2.mkfs
565 * arranges the journal blocks sequentially to maximize performance.
566 * So the extent would map the first block for the entire file length.
567 * However, gfs2_jadd can happen while file activity is happening, so
568 * those journals may not be sequential. Less likely is the case where
569 * the users created their own journals by mounting the metafs and
570 * laying it out. But it's still possible. These journals might have
571 * several extents.
572 *
573 * TODO: This should be done in bigger chunks rather than one block at a time,
574 * but since it's only done at mount time, I'm not worried about the
575 * time it takes.
576 */
577static int map_journal_extents(struct gfs2_sbd *sdp)
578{
579 struct gfs2_jdesc *jd = sdp->sd_jdesc;
580 unsigned int lb;
581 u64 db, prev_db; /* logical block, disk block, prev disk block */
582 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
583 struct gfs2_journal_extent *jext = NULL;
584 struct buffer_head bh;
585 int rc = 0;
586
Bob Petersonda6dd402007-12-11 18:49:21 -0600587 prev_db = 0;
588
Steven Whitehousec9e98882008-11-04 09:47:33 +0000589 for (lb = 0; lb < ip->i_disksize >> sdp->sd_sb.sb_bsize_shift; lb++) {
Bob Petersonda6dd402007-12-11 18:49:21 -0600590 bh.b_state = 0;
591 bh.b_blocknr = 0;
592 bh.b_size = 1 << ip->i_inode.i_blkbits;
593 rc = gfs2_block_map(jd->jd_inode, lb, &bh, 0);
594 db = bh.b_blocknr;
595 if (rc || !db) {
596 printk(KERN_INFO "GFS2 journal mapping error %d: lb="
597 "%u db=%llu\n", rc, lb, (unsigned long long)db);
598 break;
599 }
600 if (!prev_db || db != prev_db + 1) {
601 jext = kzalloc(sizeof(struct gfs2_journal_extent),
602 GFP_KERNEL);
603 if (!jext) {
604 printk(KERN_INFO "GFS2 error: out of memory "
605 "mapping journal extents.\n");
606 rc = -ENOMEM;
607 break;
608 }
609 jext->dblock = db;
610 jext->lblock = lb;
611 jext->blocks = 1;
612 list_add_tail(&jext->extent_list, &jd->extent_list);
613 } else {
614 jext->blocks++;
615 }
616 prev_db = db;
617 }
618 return rc;
619}
620
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000621static void gfs2_others_may_mount(struct gfs2_sbd *sdp)
Steven Whitehouseda755fd2008-01-30 15:34:04 +0000622{
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000623 char *message = "FIRSTMOUNT=Done";
624 char *envp[] = { message, NULL };
625 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
626 ls->ls_first_done = 1;
627 kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp);
Steven Whitehouseda755fd2008-01-30 15:34:04 +0000628}
629
Steven Whitehouseb5289682008-11-26 12:49:26 +0000630/**
631 * gfs2_jindex_hold - Grab a lock on the jindex
632 * @sdp: The GFS2 superblock
633 * @ji_gh: the holder for the jindex glock
634 *
635 * Returns: errno
636 */
637
638static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
639{
640 struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex);
641 struct qstr name;
642 char buf[20];
643 struct gfs2_jdesc *jd;
644 int error;
645
646 name.name = buf;
647
648 mutex_lock(&sdp->sd_jindex_mutex);
649
650 for (;;) {
651 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh);
652 if (error)
653 break;
654
655 name.len = sprintf(buf, "journal%u", sdp->sd_journals);
656 name.hash = gfs2_disk_hash(name.name, name.len);
657
658 error = gfs2_dir_check(sdp->sd_jindex, &name, NULL);
659 if (error == -ENOENT) {
660 error = 0;
661 break;
662 }
663
664 gfs2_glock_dq_uninit(ji_gh);
665
666 if (error)
667 break;
668
669 error = -ENOMEM;
670 jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL);
671 if (!jd)
672 break;
673
674 INIT_LIST_HEAD(&jd->extent_list);
Tejun Heo6ecd7c22010-07-20 22:09:02 +0200675 INIT_WORK(&jd->jd_work, gfs2_recover_func);
Steven Whitehouseb5289682008-11-26 12:49:26 +0000676 jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1);
677 if (!jd->jd_inode || IS_ERR(jd->jd_inode)) {
678 if (!jd->jd_inode)
679 error = -ENOENT;
680 else
681 error = PTR_ERR(jd->jd_inode);
682 kfree(jd);
683 break;
684 }
685
686 spin_lock(&sdp->sd_jindex_spin);
687 jd->jd_jid = sdp->sd_journals++;
688 list_add_tail(&jd->jd_list, &sdp->sd_jindex_list);
689 spin_unlock(&sdp->sd_jindex_spin);
690 }
691
692 mutex_unlock(&sdp->sd_jindex_mutex);
693
694 return error;
695}
696
David Teiglandb3b94fa2006-01-16 16:50:04 +0000697static int init_journal(struct gfs2_sbd *sdp, int undo)
698{
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100699 struct inode *master = sdp->sd_master_dir->d_inode;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000700 struct gfs2_holder ji_gh;
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500701 struct gfs2_inode *ip;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000702 int jindex = 1;
703 int error = 0;
704
705 if (undo) {
706 jindex = 0;
Steven Whitehousefe64d512009-05-19 10:01:18 +0100707 goto fail_jinode_gh;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000708 }
709
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100710 sdp->sd_jindex = gfs2_lookup_simple(master, "jindex");
Steven Whitehousec7526662006-03-20 12:30:04 -0500711 if (IS_ERR(sdp->sd_jindex)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000712 fs_err(sdp, "can't lookup journal index: %d\n", error);
Steven Whitehousec7526662006-03-20 12:30:04 -0500713 return PTR_ERR(sdp->sd_jindex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000714 }
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400715 ip = GFS2_I(sdp->sd_jindex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000716
717 /* Load in the journal index special file */
718
719 error = gfs2_jindex_hold(sdp, &ji_gh);
720 if (error) {
721 fs_err(sdp, "can't read journal index: %d\n", error);
722 goto fail;
723 }
724
Abhijith Das0e5a9fb2010-02-05 18:25:41 -0500725 error = -EUSERS;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000726 if (!gfs2_jindex_size(sdp)) {
727 fs_err(sdp, "no journals!\n");
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400728 goto fail_jindex;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000729 }
730
731 if (sdp->sd_args.ar_spectator) {
732 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
Steven Whitehousefd041f02007-11-08 14:55:03 +0000733 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
Benjamin Marzinski5e687ea2010-05-04 14:29:16 -0500734 atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
735 atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000736 } else {
737 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
738 fs_err(sdp, "can't mount journal #%u\n",
739 sdp->sd_lockstruct.ls_jid);
740 fs_err(sdp, "there are only %u journals (0 - %u)\n",
741 gfs2_jindex_size(sdp),
742 gfs2_jindex_size(sdp) - 1);
743 goto fail_jindex;
744 }
745 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
746
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400747 error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000748 &gfs2_journal_glops,
749 LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
750 &sdp->sd_journal_gh);
751 if (error) {
752 fs_err(sdp, "can't acquire journal glock: %d\n", error);
753 goto fail_jindex;
754 }
755
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400756 ip = GFS2_I(sdp->sd_jdesc->jd_inode);
757 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
Bob Peterson75be73a2007-08-08 17:08:14 -0500758 LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000759 &sdp->sd_jinode_gh);
760 if (error) {
761 fs_err(sdp, "can't acquire journal inode glock: %d\n",
762 error);
763 goto fail_journal_gh;
764 }
765
766 error = gfs2_jdesc_check(sdp->sd_jdesc);
767 if (error) {
768 fs_err(sdp, "my journal (%u) is bad: %d\n",
769 sdp->sd_jdesc->jd_jid, error);
770 goto fail_jinode_gh;
771 }
Steven Whitehousefd041f02007-11-08 14:55:03 +0000772 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
Benjamin Marzinski5e687ea2010-05-04 14:29:16 -0500773 atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
774 atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
Bob Petersonda6dd402007-12-11 18:49:21 -0600775
776 /* Map the extents for this journal's blocks */
777 map_journal_extents(sdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000778 }
Steven Whitehouse63997772009-06-12 08:49:20 +0100779 trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000780
781 if (sdp->sd_lockstruct.ls_first) {
782 unsigned int x;
783 for (x = 0; x < sdp->sd_journals; x++) {
Tejun Heo6ecd7c22010-07-20 22:09:02 +0200784 error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x),
785 true);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000786 if (error) {
787 fs_err(sdp, "error recovering journal %u: %d\n",
788 x, error);
789 goto fail_jinode_gh;
790 }
791 }
792
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000793 gfs2_others_may_mount(sdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000794 } else if (!sdp->sd_args.ar_spectator) {
Tejun Heo6ecd7c22010-07-20 22:09:02 +0200795 error = gfs2_recover_journal(sdp->sd_jdesc, true);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000796 if (error) {
797 fs_err(sdp, "error recovering my journal: %d\n", error);
798 goto fail_jinode_gh;
799 }
800 }
801
802 set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
803 gfs2_glock_dq_uninit(&ji_gh);
804 jindex = 0;
805
David Teiglandb3b94fa2006-01-16 16:50:04 +0000806 return 0;
807
Steven Whitehousea91ea692006-09-04 12:04:26 -0400808fail_jinode_gh:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000809 if (!sdp->sd_args.ar_spectator)
810 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400811fail_journal_gh:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000812 if (!sdp->sd_args.ar_spectator)
813 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400814fail_jindex:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000815 gfs2_jindex_free(sdp);
816 if (jindex)
817 gfs2_glock_dq_uninit(&ji_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400818fail:
Steven Whitehousef42faf42006-01-30 18:34:10 +0000819 iput(sdp->sd_jindex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000820 return error;
821}
822
David Teiglandb3b94fa2006-01-16 16:50:04 +0000823
824static int init_inodes(struct gfs2_sbd *sdp, int undo)
825{
David Teiglandb3b94fa2006-01-16 16:50:04 +0000826 int error = 0;
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500827 struct gfs2_inode *ip;
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100828 struct inode *master = sdp->sd_master_dir->d_inode;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000829
830 if (undo)
Steven Whitehousef42faf42006-01-30 18:34:10 +0000831 goto fail_qinode;
832
Steven Whitehousef42faf42006-01-30 18:34:10 +0000833 error = init_journal(sdp, undo);
834 if (error)
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100835 goto fail;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000836
David Teiglandb3b94fa2006-01-16 16:50:04 +0000837 /* Read in the master statfs inode */
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100838 sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs");
Steven Whitehousec7526662006-03-20 12:30:04 -0500839 if (IS_ERR(sdp->sd_statfs_inode)) {
840 error = PTR_ERR(sdp->sd_statfs_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000841 fs_err(sdp, "can't read in statfs inode: %d\n", error);
Steven Whitehouse8d8291a2009-08-27 15:51:07 +0100842 goto fail_journal;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000843 }
844
845 /* Read in the resource index inode */
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100846 sdp->sd_rindex = gfs2_lookup_simple(master, "rindex");
Steven Whitehousec7526662006-03-20 12:30:04 -0500847 if (IS_ERR(sdp->sd_rindex)) {
848 error = PTR_ERR(sdp->sd_rindex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000849 fs_err(sdp, "can't get resource index inode: %d\n", error);
850 goto fail_statfs;
851 }
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400852 ip = GFS2_I(sdp->sd_rindex);
Bob Petersoncf45b752008-01-31 10:31:39 -0600853 sdp->sd_rindex_uptodate = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000854
855 /* Read in the quota inode */
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100856 sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota");
Steven Whitehousec7526662006-03-20 12:30:04 -0500857 if (IS_ERR(sdp->sd_quota_inode)) {
858 error = PTR_ERR(sdp->sd_quota_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000859 fs_err(sdp, "can't get quota file inode: %d\n", error);
860 goto fail_rindex;
861 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000862 return 0;
863
Steven Whitehousef42faf42006-01-30 18:34:10 +0000864fail_qinode:
865 iput(sdp->sd_quota_inode);
Steven Whitehousef42faf42006-01-30 18:34:10 +0000866fail_rindex:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000867 gfs2_clear_rgrpd(sdp);
Steven Whitehousef42faf42006-01-30 18:34:10 +0000868 iput(sdp->sd_rindex);
Steven Whitehousef42faf42006-01-30 18:34:10 +0000869fail_statfs:
870 iput(sdp->sd_statfs_inode);
Steven Whitehousef42faf42006-01-30 18:34:10 +0000871fail_journal:
872 init_journal(sdp, UNDO);
Steven Whitehousef42faf42006-01-30 18:34:10 +0000873fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000874 return error;
875}
876
877static int init_per_node(struct gfs2_sbd *sdp, int undo)
878{
Steven Whitehousef42faf42006-01-30 18:34:10 +0000879 struct inode *pn = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000880 char buf[30];
881 int error = 0;
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500882 struct gfs2_inode *ip;
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100883 struct inode *master = sdp->sd_master_dir->d_inode;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000884
885 if (sdp->sd_args.ar_spectator)
886 return 0;
887
888 if (undo)
889 goto fail_qc_gh;
890
Steven Whitehouse9b8df982008-08-08 13:45:13 +0100891 pn = gfs2_lookup_simple(master, "per_node");
Steven Whitehousec7526662006-03-20 12:30:04 -0500892 if (IS_ERR(pn)) {
893 error = PTR_ERR(pn);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000894 fs_err(sdp, "can't find per_node directory: %d\n", error);
895 return error;
896 }
897
David Teiglandb3b94fa2006-01-16 16:50:04 +0000898 sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
Steven Whitehousec7526662006-03-20 12:30:04 -0500899 sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
900 if (IS_ERR(sdp->sd_sc_inode)) {
901 error = PTR_ERR(sdp->sd_sc_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000902 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
Steven Whitehouse8d8291a2009-08-27 15:51:07 +0100903 goto fail;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000904 }
905
David Teiglandb3b94fa2006-01-16 16:50:04 +0000906 sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
Steven Whitehousec7526662006-03-20 12:30:04 -0500907 sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
908 if (IS_ERR(sdp->sd_qc_inode)) {
909 error = PTR_ERR(sdp->sd_qc_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000910 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
911 goto fail_ut_i;
912 }
913
Steven Whitehousef42faf42006-01-30 18:34:10 +0000914 iput(pn);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000915 pn = NULL;
916
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400917 ip = GFS2_I(sdp->sd_sc_inode);
Steven Whitehouse8d8291a2009-08-27 15:51:07 +0100918 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000919 &sdp->sd_sc_gh);
920 if (error) {
921 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
Steven Whitehouse8d8291a2009-08-27 15:51:07 +0100922 goto fail_qc_i;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000923 }
924
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400925 ip = GFS2_I(sdp->sd_qc_inode);
Steven Whitehouse8d8291a2009-08-27 15:51:07 +0100926 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000927 &sdp->sd_qc_gh);
928 if (error) {
929 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
930 goto fail_ut_gh;
931 }
932
933 return 0;
934
Steven Whitehousea91ea692006-09-04 12:04:26 -0400935fail_qc_gh:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000936 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400937fail_ut_gh:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000938 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400939fail_qc_i:
Steven Whitehousef42faf42006-01-30 18:34:10 +0000940 iput(sdp->sd_qc_inode);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400941fail_ut_i:
Steven Whitehousef42faf42006-01-30 18:34:10 +0000942 iput(sdp->sd_sc_inode);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400943fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000944 if (pn)
Steven Whitehousef42faf42006-01-30 18:34:10 +0000945 iput(pn);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000946 return error;
947}
948
949static int init_threads(struct gfs2_sbd *sdp, int undo)
950{
951 struct task_struct *p;
952 int error = 0;
953
954 if (undo)
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400955 goto fail_quotad;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000956
David Teiglandb3b94fa2006-01-16 16:50:04 +0000957 p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
958 error = IS_ERR(p);
959 if (error) {
960 fs_err(sdp, "can't start logd thread: %d\n", error);
961 return error;
962 }
963 sdp->sd_logd_process = p;
964
David Teiglandb3b94fa2006-01-16 16:50:04 +0000965 p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
966 error = IS_ERR(p);
967 if (error) {
968 fs_err(sdp, "can't start quotad thread: %d\n", error);
969 goto fail;
970 }
971 sdp->sd_quotad_process = p;
972
David Teiglandb3b94fa2006-01-16 16:50:04 +0000973 return 0;
974
David Teiglandb3b94fa2006-01-16 16:50:04 +0000975
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400976fail_quotad:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000977 kthread_stop(sdp->sd_quotad_process);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400978fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000979 kthread_stop(sdp->sd_logd_process);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000980 return error;
981}
982
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000983static const match_table_t nolock_tokens = {
984 { Opt_jid, "jid=%d\n", },
985 { Opt_err, NULL },
986};
987
Steven Whitehouse8f052282010-01-29 15:21:27 +0000988static void nolock_put_lock(struct kmem_cache *cachep, struct gfs2_glock *gl)
989{
990 struct gfs2_sbd *sdp = gl->gl_sbd;
991 kmem_cache_free(cachep, gl);
992 if (atomic_dec_and_test(&sdp->sd_glock_disposal))
993 wake_up(&sdp->sd_glock_wait);
994}
995
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000996static const struct lm_lockops nolock_ops = {
997 .lm_proto_name = "lock_nolock",
Steven Whitehouse8f052282010-01-29 15:21:27 +0000998 .lm_put_lock = nolock_put_lock,
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000999 .lm_tokens = &nolock_tokens,
1000};
1001
David Teiglandb3b94fa2006-01-16 16:50:04 +00001002/**
Steven Whitehouseda755fd2008-01-30 15:34:04 +00001003 * gfs2_lm_mount - mount a locking protocol
1004 * @sdp: the filesystem
Daniel Mack3ad2f3f2010-02-03 08:01:28 +08001005 * @args: mount arguments
Steven Whitehouseda755fd2008-01-30 15:34:04 +00001006 * @silent: if 1, don't complain if the FS isn't a GFS2 fs
1007 *
1008 * Returns: errno
1009 */
1010
1011static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
1012{
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001013 const struct lm_lockops *lm;
1014 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
1015 struct gfs2_args *args = &sdp->sd_args;
1016 const char *proto = sdp->sd_proto_name;
1017 const char *table = sdp->sd_table_name;
1018 const char *fsname;
1019 char *o, *options;
1020 int ret;
Steven Whitehouseda755fd2008-01-30 15:34:04 +00001021
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001022 if (!strcmp("lock_nolock", proto)) {
1023 lm = &nolock_ops;
1024 sdp->sd_args.ar_localflocks = 1;
1025 sdp->sd_args.ar_localcaching = 1;
1026#ifdef CONFIG_GFS2_FS_LOCKING_DLM
1027 } else if (!strcmp("lock_dlm", proto)) {
1028 lm = &gfs2_dlm_ops;
1029#endif
1030 } else {
1031 printk(KERN_INFO "GFS2: can't find protocol %s\n", proto);
1032 return -ENOENT;
1033 }
Steven Whitehouseda755fd2008-01-30 15:34:04 +00001034
1035 fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
1036
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001037 ls->ls_ops = lm;
1038 ls->ls_first = 1;
Steven Whitehouseda755fd2008-01-30 15:34:04 +00001039
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001040 for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) {
1041 substring_t tmp[MAX_OPT_ARGS];
1042 int token, option;
1043
1044 if (!o || !*o)
1045 continue;
1046
1047 token = match_token(o, *lm->lm_tokens, tmp);
1048 switch (token) {
1049 case Opt_jid:
1050 ret = match_int(&tmp[0], &option);
1051 if (ret || option < 0)
1052 goto hostdata_error;
1053 ls->ls_jid = option;
1054 break;
1055 case Opt_id:
Steven Whitehouse2b88f7c2009-09-09 15:59:35 +01001056 /* Obsolete, but left for backward compat purposes */
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001057 break;
1058 case Opt_first:
1059 ret = match_int(&tmp[0], &option);
1060 if (ret || (option != 0 && option != 1))
1061 goto hostdata_error;
1062 ls->ls_first = option;
1063 break;
1064 case Opt_nodir:
1065 ret = match_int(&tmp[0], &option);
1066 if (ret || (option != 0 && option != 1))
1067 goto hostdata_error;
1068 ls->ls_nodir = option;
1069 break;
1070 case Opt_err:
1071 default:
1072hostdata_error:
1073 fs_info(sdp, "unknown hostdata (%s)\n", o);
1074 return -EINVAL;
1075 }
Steven Whitehouseda755fd2008-01-30 15:34:04 +00001076 }
1077
1078 if (sdp->sd_args.ar_spectator)
1079 snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", table);
1080 else
1081 snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", table,
1082 sdp->sd_lockstruct.ls_jid);
1083
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001084 fsname = strchr(table, ':');
1085 if (fsname)
1086 fsname++;
1087 if (lm->lm_mount == NULL) {
1088 fs_info(sdp, "Now mounting FS...\n");
1089 return 0;
Steven Whitehouseda755fd2008-01-30 15:34:04 +00001090 }
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001091 ret = lm->lm_mount(sdp, fsname);
1092 if (ret == 0)
1093 fs_info(sdp, "Joined cluster. Now mounting FS...\n");
1094 return ret;
Steven Whitehouseda755fd2008-01-30 15:34:04 +00001095}
1096
1097void gfs2_lm_unmount(struct gfs2_sbd *sdp)
1098{
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001099 const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops;
1100 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) &&
1101 lm->lm_unmount)
1102 lm->lm_unmount(sdp);
Steven Whitehouseda755fd2008-01-30 15:34:04 +00001103}
1104
Steven Whitehouse8633ecf2009-07-31 11:07:29 +01001105void gfs2_online_uevent(struct gfs2_sbd *sdp)
1106{
1107 struct super_block *sb = sdp->sd_vfs;
1108 char ro[20];
1109 char spectator[20];
1110 char *envp[] = { ro, spectator, NULL };
1111 sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
1112 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
1113 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp);
1114}
1115
Steven Whitehouseda755fd2008-01-30 15:34:04 +00001116/**
David Teiglandb3b94fa2006-01-16 16:50:04 +00001117 * fill_super - Read in superblock
1118 * @sb: The VFS superblock
1119 * @data: Mount options
1120 * @silent: Don't complain if it's not a GFS2 filesystem
1121 *
1122 * Returns: errno
1123 */
1124
Steven Whitehousef55073f2009-09-28 10:30:49 +01001125static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001126{
1127 struct gfs2_sbd *sdp;
1128 struct gfs2_holder mount_gh;
1129 int error;
1130
1131 sdp = init_sbd(sb);
1132 if (!sdp) {
Steven Whitehoused92a8d42006-02-27 10:57:14 -05001133 printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
David Teiglandb3b94fa2006-01-16 16:50:04 +00001134 return -ENOMEM;
1135 }
Steven Whitehousef55073f2009-09-28 10:30:49 +01001136 sdp->sd_args = *args;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001137
Steven Whitehousefe64d512009-05-19 10:01:18 +01001138 if (sdp->sd_args.ar_spectator) {
Steven Whitehouse6f04c1c2009-01-06 11:52:25 +00001139 sb->s_flags |= MS_RDONLY;
Steven Whitehousefe64d512009-05-19 10:01:18 +01001140 set_bit(SDF_NORECOVERY, &sdp->sd_flags);
1141 }
Steven Whitehouse6f04c1c2009-01-06 11:52:25 +00001142 if (sdp->sd_args.ar_posix_acl)
1143 sb->s_flags |= MS_POSIXACL;
Christoph Hellwigf25934c2009-10-30 08:03:27 +01001144 if (sdp->sd_args.ar_nobarrier)
1145 set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
Steven Whitehouse6f04c1c2009-01-06 11:52:25 +00001146
Steven Whitehouse719ee342008-09-18 13:53:59 +01001147 sb->s_magic = GFS2_MAGIC;
1148 sb->s_op = &gfs2_super_ops;
1149 sb->s_export_op = &gfs2_export_ops;
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001150 sb->s_xattr = gfs2_xattr_handlers;
Steven Whitehousecc632e72009-09-15 09:59:02 +01001151 sb->s_qcop = &gfs2_quotactl_ops;
1152 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
Steven Whitehouse719ee342008-09-18 13:53:59 +01001153 sb->s_time_gran = 1;
1154 sb->s_maxbytes = MAX_LFS_FILESIZE;
Steven Whitehouse419c93e2006-03-02 16:33:41 -05001155
1156 /* Set up the buffer cache and fill in some fake block size values
1157 to allow us to read-in the on-disk superblock. */
1158 sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
1159 sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
1160 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
1161 GFS2_BASIC_BLOCK_SHIFT;
1162 sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001163
Benjamin Marzinski5e687ea2010-05-04 14:29:16 -05001164 sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit;
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001165 sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum;
1166 if (sdp->sd_args.ar_statfs_quantum) {
1167 sdp->sd_tune.gt_statfs_slow = 0;
1168 sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum;
1169 }
1170 else {
1171 sdp->sd_tune.gt_statfs_slow = 1;
1172 sdp->sd_tune.gt_statfs_quantum = 30;
1173 }
Steven Whitehouse48c2b612009-05-13 14:49:48 +01001174
David Teiglandb3b94fa2006-01-16 16:50:04 +00001175 error = init_names(sdp, silent);
1176 if (error)
1177 goto fail;
1178
Robert Peterson7c52b162007-03-16 10:26:37 +00001179 gfs2_create_debugfs_file(sdp);
1180
David Teiglandb3b94fa2006-01-16 16:50:04 +00001181 error = gfs2_sys_fs_add(sdp);
1182 if (error)
1183 goto fail;
1184
1185 error = gfs2_lm_mount(sdp, silent);
1186 if (error)
1187 goto fail_sys;
1188
1189 error = init_locking(sdp, &mount_gh, DO);
1190 if (error)
1191 goto fail_lm;
1192
Steven Whitehouse9b8df982008-08-08 13:45:13 +01001193 error = init_sb(sdp, silent);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001194 if (error)
1195 goto fail_locking;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001196
1197 error = init_inodes(sdp, DO);
1198 if (error)
Steven Whitehousef42faf42006-01-30 18:34:10 +00001199 goto fail_sb;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001200
1201 error = init_per_node(sdp, DO);
1202 if (error)
1203 goto fail_inodes;
1204
1205 error = gfs2_statfs_init(sdp);
1206 if (error) {
1207 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
1208 goto fail_per_node;
1209 }
1210
1211 error = init_threads(sdp, DO);
1212 if (error)
1213 goto fail_per_node;
1214
1215 if (!(sb->s_flags & MS_RDONLY)) {
1216 error = gfs2_make_fs_rw(sdp);
1217 if (error) {
1218 fs_err(sdp, "can't make FS RW: %d\n", error);
1219 goto fail_threads;
1220 }
1221 }
1222
1223 gfs2_glock_dq_uninit(&mount_gh);
Steven Whitehouse8633ecf2009-07-31 11:07:29 +01001224 gfs2_online_uevent(sdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001225 return 0;
1226
Steven Whitehousea91ea692006-09-04 12:04:26 -04001227fail_threads:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001228 init_threads(sdp, UNDO);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001229fail_per_node:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001230 init_per_node(sdp, UNDO);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001231fail_inodes:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001232 init_inodes(sdp, UNDO);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001233fail_sb:
Steven Whitehouse9b8df982008-08-08 13:45:13 +01001234 if (sdp->sd_root_dir)
1235 dput(sdp->sd_root_dir);
1236 if (sdp->sd_master_dir)
1237 dput(sdp->sd_master_dir);
Steven Whitehousee7c87072009-01-20 16:39:23 +00001238 if (sb->s_root)
1239 dput(sb->s_root);
Steven Whitehouse9b8df982008-08-08 13:45:13 +01001240 sb->s_root = NULL;
Steven Whitehousea91ea692006-09-04 12:04:26 -04001241fail_locking:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001242 init_locking(sdp, &mount_gh, UNDO);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001243fail_lm:
Steven Whitehousec1184f82010-01-08 16:14:29 +00001244 invalidate_inodes(sb);
Steven Whitehousefefc03b2008-12-19 15:32:06 +00001245 gfs2_gl_hash_clear(sdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001246 gfs2_lm_unmount(sdp);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001247fail_sys:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001248 gfs2_sys_fs_del(sdp);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001249fail:
Robert Peterson5f882092007-04-18 11:41:11 -05001250 gfs2_delete_debugfs_file(sdp);
Steven Whitehousea2c45802006-09-08 10:13:03 -04001251 kfree(sdp);
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001252 sb->s_fs_info = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001253 return error;
1254}
1255
Steven Whitehousef55073f2009-09-28 10:30:49 +01001256static int set_gfs2_super(struct super_block *s, void *data)
Steven Whitehouse9b8df982008-08-08 13:45:13 +01001257{
Steven Whitehousef55073f2009-09-28 10:30:49 +01001258 s->s_bdev = data;
1259 s->s_dev = s->s_bdev->bd_dev;
1260
1261 /*
1262 * We set the bdi here to the queue backing, file systems can
1263 * overwrite this in ->fill_super()
1264 */
1265 s->s_bdi = &bdev_get_queue(s->s_bdev)->backing_dev_info;
1266 return 0;
Steven Whitehouse9b8df982008-08-08 13:45:13 +01001267}
1268
Steven Whitehousef55073f2009-09-28 10:30:49 +01001269static int test_gfs2_super(struct super_block *s, void *ptr)
Steven Whitehousef6d03132009-06-05 07:18:57 +01001270{
1271 struct block_device *bdev = ptr;
1272 return (bdev == s->s_bdev);
1273}
1274
Steven Whitehousef55073f2009-09-28 10:30:49 +01001275/**
1276 * gfs2_get_sb - Get the GFS2 superblock
1277 * @fs_type: The GFS2 filesystem type
1278 * @flags: Mount flags
1279 * @dev_name: The name of the device
1280 * @data: The mount arguments
1281 * @mnt: The vfsmnt for this mount
1282 *
1283 * Q. Why not use get_sb_bdev() ?
1284 * A. We need to select one of two root directories to mount, independent
1285 * of whether this is the initial, or subsequent, mount of this sb
1286 *
1287 * Returns: 0 or -ve on error
1288 */
1289
1290static int gfs2_get_sb(struct file_system_type *fs_type, int flags,
1291 const char *dev_name, void *data, struct vfsmount *mnt)
1292{
1293 struct block_device *bdev;
1294 struct super_block *s;
1295 fmode_t mode = FMODE_READ;
1296 int error;
1297 struct gfs2_args args;
1298 struct gfs2_sbd *sdp;
1299
1300 if (!(flags & MS_RDONLY))
1301 mode |= FMODE_WRITE;
1302
1303 bdev = open_bdev_exclusive(dev_name, mode, fs_type);
1304 if (IS_ERR(bdev))
1305 return PTR_ERR(bdev);
1306
1307 /*
1308 * once the super is inserted into the list by sget, s_umount
1309 * will protect the lockfs code from trying to start a snapshot
1310 * while we are mounting
1311 */
1312 mutex_lock(&bdev->bd_fsfreeze_mutex);
1313 if (bdev->bd_fsfreeze_count > 0) {
1314 mutex_unlock(&bdev->bd_fsfreeze_mutex);
1315 error = -EBUSY;
1316 goto error_bdev;
1317 }
1318 s = sget(fs_type, test_gfs2_super, set_gfs2_super, bdev);
1319 mutex_unlock(&bdev->bd_fsfreeze_mutex);
1320 error = PTR_ERR(s);
1321 if (IS_ERR(s))
1322 goto error_bdev;
1323
1324 memset(&args, 0, sizeof(args));
1325 args.ar_quota = GFS2_QUOTA_DEFAULT;
1326 args.ar_data = GFS2_DATA_DEFAULT;
Benjamin Marzinski5e687ea2010-05-04 14:29:16 -05001327 args.ar_commit = 30;
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001328 args.ar_statfs_quantum = 30;
1329 args.ar_quota_quantum = 60;
Steven Whitehousef55073f2009-09-28 10:30:49 +01001330 args.ar_errors = GFS2_ERRORS_DEFAULT;
1331
1332 error = gfs2_mount_args(&args, data);
1333 if (error) {
1334 printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
1335 if (s->s_root)
1336 goto error_super;
1337 deactivate_locked_super(s);
1338 return error;
1339 }
1340
1341 if (s->s_root) {
1342 error = -EBUSY;
1343 if ((flags ^ s->s_flags) & MS_RDONLY)
1344 goto error_super;
1345 close_bdev_exclusive(bdev, mode);
1346 } else {
1347 char b[BDEVNAME_SIZE];
1348
1349 s->s_flags = flags;
1350 s->s_mode = mode;
1351 strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
1352 sb_set_blocksize(s, block_size(bdev));
1353 error = fill_super(s, &args, flags & MS_SILENT ? 1 : 0);
1354 if (error) {
1355 deactivate_locked_super(s);
1356 return error;
1357 }
1358 s->s_flags |= MS_ACTIVE;
1359 bdev->bd_super = s;
1360 }
1361
1362 sdp = s->s_fs_info;
1363 mnt->mnt_sb = s;
1364 if (args.ar_meta)
1365 mnt->mnt_root = dget(sdp->sd_master_dir);
1366 else
1367 mnt->mnt_root = dget(sdp->sd_root_dir);
1368 return 0;
1369
1370error_super:
1371 deactivate_locked_super(s);
1372error_bdev:
1373 close_bdev_exclusive(bdev, mode);
1374 return error;
1375}
1376
Steven Whitehousef6d03132009-06-05 07:18:57 +01001377static int set_meta_super(struct super_block *s, void *ptr)
1378{
1379 return -EINVAL;
1380}
1381
Steven Whitehouse003dec82009-06-10 10:31:45 +01001382static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
1383 const char *dev_name, void *data, struct vfsmount *mnt)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001384{
Steven Whitehousef6d03132009-06-05 07:18:57 +01001385 struct super_block *s;
Steven Whitehouse003dec82009-06-10 10:31:45 +01001386 struct gfs2_sbd *sdp;
Al Viroe24977d2009-04-02 21:17:03 -04001387 struct path path;
Abhijith Das86384602006-08-25 11:13:37 -05001388 int error;
Steven Whitehouse907b9bc2006-09-25 09:26:04 -04001389
Al Viroe24977d2009-04-02 21:17:03 -04001390 error = kern_path(dev_name, LOOKUP_FOLLOW, &path);
Abhijith Das86384602006-08-25 11:13:37 -05001391 if (error) {
Steven Whitehouse9b8df982008-08-08 13:45:13 +01001392 printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n",
1393 dev_name, error);
Steven Whitehouse003dec82009-06-10 10:31:45 +01001394 return error;
Abhijith Das86384602006-08-25 11:13:37 -05001395 }
Steven Whitehousef55073f2009-09-28 10:30:49 +01001396 s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super,
Steven Whitehousef6d03132009-06-05 07:18:57 +01001397 path.dentry->d_inode->i_sb->s_bdev);
Al Viroe24977d2009-04-02 21:17:03 -04001398 path_put(&path);
Steven Whitehousef6d03132009-06-05 07:18:57 +01001399 if (IS_ERR(s)) {
Abhijith Das86384602006-08-25 11:13:37 -05001400 printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
Steven Whitehousef6d03132009-06-05 07:18:57 +01001401 return PTR_ERR(s);
Abhijith Das86384602006-08-25 11:13:37 -05001402 }
Steven Whitehousef55073f2009-09-28 10:30:49 +01001403 if ((flags ^ s->s_flags) & MS_RDONLY) {
1404 deactivate_locked_super(s);
1405 return -EBUSY;
1406 }
Steven Whitehousef6d03132009-06-05 07:18:57 +01001407 sdp = s->s_fs_info;
1408 mnt->mnt_sb = s;
Steven Whitehouse9b8df982008-08-08 13:45:13 +01001409 mnt->mnt_root = dget(sdp->sd_master_dir);
1410 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001411}
1412
Steven Whitehouse419c93e2006-03-02 16:33:41 -05001413static void gfs2_kill_sb(struct super_block *sb)
1414{
Abhijith Das86384602006-08-25 11:13:37 -05001415 struct gfs2_sbd *sdp = sb->s_fs_info;
Steven Whitehouse88a19ad2008-12-19 15:43:05 +00001416
1417 if (sdp == NULL) {
1418 kill_block_super(sb);
1419 return;
Abhijith Dasacd2c8a2008-09-15 08:54:06 -05001420 }
Steven Whitehouse88a19ad2008-12-19 15:43:05 +00001421
1422 gfs2_meta_syncfs(sdp);
1423 dput(sdp->sd_root_dir);
1424 dput(sdp->sd_master_dir);
1425 sdp->sd_root_dir = NULL;
1426 sdp->sd_master_dir = NULL;
Steven Whitehousefefc03b2008-12-19 15:32:06 +00001427 shrink_dcache_sb(sb);
Steven Whitehouse9b8df982008-08-08 13:45:13 +01001428 kill_block_super(sb);
Steven Whitehouse88a19ad2008-12-19 15:43:05 +00001429 gfs2_delete_debugfs_file(sdp);
1430 kfree(sdp);
Abhijith Das86384602006-08-25 11:13:37 -05001431}
1432
David Teiglandb3b94fa2006-01-16 16:50:04 +00001433struct file_system_type gfs2_fs_type = {
1434 .name = "gfs2",
1435 .fs_flags = FS_REQUIRES_DEV,
1436 .get_sb = gfs2_get_sb,
Steven Whitehouse419c93e2006-03-02 16:33:41 -05001437 .kill_sb = gfs2_kill_sb,
1438 .owner = THIS_MODULE,
1439};
1440
1441struct file_system_type gfs2meta_fs_type = {
1442 .name = "gfs2meta",
1443 .fs_flags = FS_REQUIRES_DEV,
Abhijith Das86384602006-08-25 11:13:37 -05001444 .get_sb = gfs2_get_sb_meta,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001445 .owner = THIS_MODULE,
1446};
1447