1 /*
2 * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
22 *
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
25 *
26 * http://www.sgi.com
27 *
28 * For further information regarding this notice, see:
29 *
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
31 */
32
33 #include "xfs.h"
34
35 #include "xfs_inum.h"
36 #include "xfs_log.h"
37 #include "xfs_clnt.h"
38 #include "xfs_trans.h"
39 #include "xfs_sb.h"
40 #include "xfs_dir.h"
41 #include "xfs_dir2.h"
42 #include "xfs_alloc.h"
43 #include "xfs_dmapi.h"
44 #include "xfs_quota.h"
45 #include "xfs_mount.h"
46 #include "xfs_alloc_btree.h"
47 #include "xfs_bmap_btree.h"
48 #include "xfs_ialloc_btree.h"
49 #include "xfs_btree.h"
50 #include "xfs_ialloc.h"
51 #include "xfs_attr_sf.h"
52 #include "xfs_dir_sf.h"
53 #include "xfs_dir2_sf.h"
54 #include "xfs_dinode.h"
55 #include "xfs_inode.h"
56 #include "xfs_bmap.h"
57 #include "xfs_bit.h"
58 #include "xfs_rtalloc.h"
59 #include "xfs_error.h"
60 #include "xfs_itable.h"
61 #include "xfs_rw.h"
62 #include "xfs_acl.h"
63 #include "xfs_cap.h"
64 #include "xfs_mac.h"
65 #include "xfs_attr.h"
66 #include "xfs_buf_item.h"
67 #include "xfs_utils.h"
68 #include "xfs_version.h"
69 #include "xfs_ioctl32.h"
70
71 #include <linux/namei.h>
72 #include <linux/init.h>
73 #include <linux/mount.h>
74 #include <linux/writeback.h>
75
76 STATIC struct quotactl_ops linvfs_qops;
77 STATIC struct super_operations linvfs_sops;
78 STATIC kmem_zone_t *linvfs_inode_zone;
79 STATIC kmem_shaker_t xfs_inode_shaker;
80
81 STATIC struct xfs_mount_args *
82 xfs_args_allocate(
83 struct super_block *sb)
84 {
85 struct xfs_mount_args *args;
86
87 args = kmem_zalloc(sizeof(struct xfs_mount_args), KM_SLEEP);
88 args->logbufs = args->logbufsize = -1;
89 strncpy(args->fsname, sb->s_id, MAXNAMELEN);
90
91 /* Copy the already-parsed mount(2) flags we're interested in */
92 if (sb->s_flags & MS_NOATIME)
93 args->flags |= XFSMNT_NOATIME;
94
95 /* Default to 32 bit inodes on Linux all the time */
96 args->flags |= XFSMNT_32BITINODES;
97
98 return args;
99 }
100
101 __uint64_t
102 xfs_max_file_offset(
103 unsigned int blockshift)
104 {
105 unsigned int pagefactor = 1;
106 unsigned int bitshift = BITS_PER_LONG - 1;
107
108 /* Figure out maximum filesize, on Linux this can depend on
109 * the filesystem blocksize (on 32 bit platforms).
110 * __block_prepare_write does this in an [unsigned] long...
111 * page->index << (PAGE_CACHE_SHIFT - bbits)
112 * So, for page sized blocks (4K on 32 bit platforms),
113 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
114 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
115 * but for smaller blocksizes it is less (bbits = log2 bsize).
116 * Note1: get_block_t takes a long (implicit cast from above)
117 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
118 * can optionally convert the [unsigned] long from above into
119 * an [unsigned] long long.
120 */
121
122 #if BITS_PER_LONG == 32
123 # if defined(CONFIG_LBD)
124 ASSERT(sizeof(sector_t) == 8);
125 pagefactor = PAGE_CACHE_SIZE;
126 bitshift = BITS_PER_LONG;
127 # else
128 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
129 # endif
130 #endif
131
132 return (((__uint64_t)pagefactor) << bitshift) - 1;
133 }
134
135 STATIC __inline__ void
136 xfs_set_inodeops(
137 struct inode *inode)
138 {
139 vnode_t *vp = LINVFS_GET_VP(inode);
140
141 if (vp->v_type == VNON) {
142 vn_mark_bad(vp);
143 } else if (S_ISREG(inode->i_mode)) {
144 inode->i_op = &linvfs_file_inode_operations;
145 inode->i_fop = &linvfs_file_operations;
146 inode->i_mapping->a_ops = &linvfs_aops;
147 } else if (S_ISDIR(inode->i_mode)) {
148 inode->i_op = &linvfs_dir_inode_operations;
149 inode->i_fop = &linvfs_dir_operations;
150 } else if (S_ISLNK(inode->i_mode)) {
151 inode->i_op = &linvfs_symlink_inode_operations;
152 if (inode->i_blocks)
153 inode->i_mapping->a_ops = &linvfs_aops;
154 } else {
155 inode->i_op = &linvfs_file_inode_operations;
156 init_special_inode(inode, inode->i_mode, inode->i_rdev);
157 }
158 }
159
160 STATIC __inline__ void
161 xfs_revalidate_inode(
162 xfs_mount_t *mp,
163 vnode_t *vp,
164 xfs_inode_t *ip)
165 {
166 struct inode *inode = LINVFS_GET_IP(vp);
167
168 inode->i_mode = (ip->i_d.di_mode & MODEMASK) | VTTOIF(vp->v_type);
169 inode->i_nlink = ip->i_d.di_nlink;
170 inode->i_uid = ip->i_d.di_uid;
171 inode->i_gid = ip->i_d.di_gid;
172 if (((1 << vp->v_type) & ((1<<VBLK) | (1<<VCHR))) == 0) {
173 inode->i_rdev = 0;
174 } else {
175 xfs_dev_t dev = ip->i_df.if_u2.if_rdev;
176 inode->i_rdev = MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev));
177 }
178 inode->i_blksize = PAGE_CACHE_SIZE;
179 inode->i_generation = ip->i_d.di_gen;
180 i_size_write(inode, ip->i_d.di_size);
181 inode->i_blocks =
182 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
183 inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
184 inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
185 inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
186 inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
187 inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
188 inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
189 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
190 inode->i_flags |= S_IMMUTABLE;
191 else
192 inode->i_flags &= ~S_IMMUTABLE;
193 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
194 inode->i_flags |= S_APPEND;
195 else
196 inode->i_flags &= ~S_APPEND;
197 if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
198 inode->i_flags |= S_SYNC;
199 else
200 inode->i_flags &= ~S_SYNC;
201 if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
202 inode->i_flags |= S_NOATIME;
203 else
204 inode->i_flags &= ~S_NOATIME;
205 vp->v_flag &= ~VMODIFIED;
206 }
207
208 void
209 xfs_initialize_vnode(
210 bhv_desc_t *bdp,
211 vnode_t *vp,
212 bhv_desc_t *inode_bhv,
213 int unlock)
214 {
215 xfs_inode_t *ip = XFS_BHVTOI(inode_bhv);
216 struct inode *inode = LINVFS_GET_IP(vp);
217
218 if (!inode_bhv->bd_vobj) {
219 vp->v_vfsp = bhvtovfs(bdp);
220 bhv_desc_init(inode_bhv, ip, vp, &xfs_vnodeops);
221 bhv_insert(VN_BHV_HEAD(vp), inode_bhv);
222 }
223
224 /*
225 * We need to set the ops vectors, and unlock the inode, but if
226 * we have been called during the new inode create process, it is
227 * too early to fill in the Linux inode. We will get called a
228 * second time once the inode is properly set up, and then we can
229 * finish our work.
230 */
231 if (ip->i_d.di_mode != 0 && unlock && (inode->i_state & I_NEW)) {
232 vp->v_type = IFTOVT(ip->i_d.di_mode);
233 xfs_revalidate_inode(XFS_BHVTOM(bdp), vp, ip);
234 xfs_set_inodeops(inode);
235
236 ip->i_flags &= ~XFS_INEW;
237 barrier();
238
239 unlock_new_inode(inode);
240 }
241 }
242
243 int
244 xfs_blkdev_get(
245 xfs_mount_t *mp,
246 const char *name,
247 struct block_device **bdevp)
248 {
249 int error = 0;
250
251 *bdevp = open_bdev_excl(name, 0, mp);
252 if (IS_ERR(*bdevp)) {
253 error = PTR_ERR(*bdevp);
254 printk("XFS: Invalid device [%s], error=%d\n", name, error);
255 }
256
257 return -error;
258 }
259
260 void
261 xfs_blkdev_put(
262 struct block_device *bdev)
263 {
264 if (bdev)
265 close_bdev_excl(bdev);
266 }
267
268
269 STATIC struct inode *
270 linvfs_alloc_inode(
271 struct super_block *sb)
272 {
273 vnode_t *vp;
274
275 vp = (vnode_t *)kmem_cache_alloc(linvfs_inode_zone,
276 kmem_flags_convert(KM_SLEEP));
277 if (!vp)
278 return NULL;
279 return LINVFS_GET_IP(vp);
280 }
281
282 STATIC void
283 linvfs_destroy_inode(
284 struct inode *inode)
285 {
286 kmem_cache_free(linvfs_inode_zone, LINVFS_GET_VP(inode));
287 }
288
289 STATIC int
290 xfs_inode_shake(
291 int priority,
292 unsigned int gfp_mask)
293 {
294 int pages;
295
296 pages = kmem_zone_shrink(linvfs_inode_zone);
297 pages += kmem_zone_shrink(xfs_inode_zone);
298 return pages;
299 }
300
301 STATIC void
302 init_once(
303 void *data,
304 kmem_cache_t *cachep,
305 unsigned long flags)
306 {
307 vnode_t *vp = (vnode_t *)data;
308
309 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
310 SLAB_CTOR_CONSTRUCTOR)
311 inode_init_once(LINVFS_GET_IP(vp));
312 }
313
314 STATIC int
315 init_inodecache( void )
316 {
317 linvfs_inode_zone = kmem_cache_create("linvfs_icache",
318 sizeof(vnode_t), 0, SLAB_RECLAIM_ACCOUNT,
319 init_once, NULL);
320 if (linvfs_inode_zone == NULL)
321 return -ENOMEM;
322 return 0;
323 }
324
325 STATIC void
326 destroy_inodecache( void )
327 {
328 if (kmem_cache_destroy(linvfs_inode_zone))
329 printk(KERN_WARNING "%s: cache still in use!\n", __FUNCTION__);
330 }
331
332 /*
333 * Attempt to flush the inode, this will actually fail
334 * if the inode is pinned, but we dirty the inode again
335 * at the point when it is unpinned after a log write,
336 * since this is when the inode itself becomes flushable.
337 */
338 STATIC int
339 linvfs_write_inode(
340 struct inode *inode,
341 int sync)
342 {
343 vnode_t *vp = LINVFS_GET_VP(inode);
344 int error = 0, flags = FLUSH_INODE;
345
346 if (vp) {
347 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
348 if (sync)
349 flags |= FLUSH_SYNC;
350 VOP_IFLUSH(vp, flags, error);
351 if (error == EAGAIN) {
352 if (sync)
353 VOP_IFLUSH(vp, flags | FLUSH_LOG, error);
354 else
355 error = 0;
356 }
357 }
358
359 return -error;
360 }
361
362 STATIC void
363 linvfs_clear_inode(
364 struct inode *inode)
365 {
366 vnode_t *vp = LINVFS_GET_VP(inode);
367
368 if (vp) {
369 vn_rele(vp);
370 vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
371 /*
372 * Do all our cleanup, and remove this vnode.
373 */
374 vn_remove(vp);
375 }
376 }
377
378
379 /*
380 * Enqueue a work item to be picked up by the vfs xfssyncd thread.
381 * Doing this has two advantages:
382 * - It saves on stack space, which is tight in certain situations
383 * - It can be used (with care) as a mechanism to avoid deadlocks.
384 * Flushing while allocating in a full filesystem requires both.
385 */
386 STATIC void
387 xfs_syncd_queue_work(
388 struct vfs *vfs,
389 void *data,
390 void (*syncer)(vfs_t *, void *))
391 {
392 vfs_sync_work_t *work;
393
394 work = kmem_alloc(sizeof(struct vfs_sync_work), KM_SLEEP);
395 INIT_LIST_HEAD(&work->w_list);
396 work->w_syncer = syncer;
397 work->w_data = data;
398 work->w_vfs = vfs;
399 spin_lock(&vfs->vfs_sync_lock);
400 list_add_tail(&work->w_list, &vfs->vfs_sync_list);
401 spin_unlock(&vfs->vfs_sync_lock);
402 wake_up_process(vfs->vfs_sync_task);
403 }
404
405 /*
406 * Flush delayed allocate data, attempting to free up reserved space
407 * from existing allocations. At this point a new allocation attempt
408 * has failed with ENOSPC and we are in the process of scratching our
409 * heads, looking about for more room...
410 */
411 STATIC void
412 xfs_flush_inode_work(
413 vfs_t *vfs,
414 void *inode)
415 {
416 filemap_flush(((struct inode *)inode)->i_mapping);
417 iput((struct inode *)inode);
418 }
419
420 void
421 xfs_flush_inode(
422 xfs_inode_t *ip)
423 {
424 struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip));
425 struct vfs *vfs = XFS_MTOVFS(ip->i_mount);
426
427 igrab(inode);
428 xfs_syncd_queue_work(vfs, inode, xfs_flush_inode_work);
429 delay(HZ/2);
430 }
431
432 /*
433 * This is the "bigger hammer" version of xfs_flush_inode_work...
434 * (IOW, "If at first you don't succeed, use a Bigger Hammer").
435 */
436 STATIC void
437 xfs_flush_device_work(
438 vfs_t *vfs,
439 void *inode)
440 {
441 sync_blockdev(vfs->vfs_super->s_bdev);
442 iput((struct inode *)inode);
443 }
444
445 void
446 xfs_flush_device(
447 xfs_inode_t *ip)
448 {
449 struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip));
450 struct vfs *vfs = XFS_MTOVFS(ip->i_mount);
451
452 igrab(inode);
453 xfs_syncd_queue_work(vfs, inode, xfs_flush_device_work);
454 delay(HZ/2);
455 xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC);
456 }
457
458 #define SYNCD_FLAGS (SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR)
459 STATIC void
460 vfs_sync_worker(
461 vfs_t *vfsp,
462 void *unused)
463 {
464 int error;
465
466 if (!(vfsp->vfs_flag & VFS_RDONLY))
467 VFS_SYNC(vfsp, SYNCD_FLAGS, NULL, error);
468 vfsp->vfs_sync_seq++;
469 wmb();
470 wake_up(&vfsp->vfs_wait_single_sync_task);
471 }
472
473 STATIC int
474 xfssyncd(
475 void *arg)
476 {
477 long timeleft;
478 vfs_t *vfsp = (vfs_t *) arg;
479 struct list_head tmp;
480 struct vfs_sync_work *work, *n;
481
482 daemonize("xfssyncd");
483
484 vfsp->vfs_sync_work.w_vfs = vfsp;
485 vfsp->vfs_sync_work.w_syncer = vfs_sync_worker;
486 vfsp->vfs_sync_task = current;
487 wmb();
488 wake_up(&vfsp->vfs_wait_sync_task);
489
490 INIT_LIST_HEAD(&tmp);
491 timeleft = (xfs_syncd_centisecs * HZ) / 100;
492 for (;;) {
493 set_current_state(TASK_INTERRUPTIBLE);
494 timeleft = schedule_timeout(timeleft);
495 /* swsusp */
496 try_to_freeze(PF_FREEZE);
497 if (vfsp->vfs_flag & VFS_UMOUNT)
498 break;
499
500 spin_lock(&vfsp->vfs_sync_lock);
501 /*
502 * We can get woken by laptop mode, to do a sync -
503 * that's the (only!) case where the list would be
504 * empty with time remaining.
505 */
506 if (!timeleft || list_empty(&vfsp->vfs_sync_list)) {
507 if (!timeleft)
508 timeleft = (xfs_syncd_centisecs * HZ) / 100;
509 INIT_LIST_HEAD(&vfsp->vfs_sync_work.w_list);
510 list_add_tail(&vfsp->vfs_sync_work.w_list,
511 &vfsp->vfs_sync_list);
512 }
513 list_for_each_entry_safe(work, n, &vfsp->vfs_sync_list, w_list)
514 list_move(&work->w_list, &tmp);
515 spin_unlock(&vfsp->vfs_sync_lock);
516
517 list_for_each_entry_safe(work, n, &tmp, w_list) {
518 (*work->w_syncer)(vfsp, work->w_data);
519 list_del(&work->w_list);
520 if (work == &vfsp->vfs_sync_work)
521 continue;
522 kmem_free(work, sizeof(struct vfs_sync_work));
523 }
524 }
525
526 vfsp->vfs_sync_task = NULL;
527 wmb();
528 wake_up(&vfsp->vfs_wait_sync_task);
529
530 return 0;
531 }
532
533 STATIC int
534 linvfs_start_syncd(
535 vfs_t *vfsp)
536 {
537 int pid;
538
539 pid = kernel_thread(xfssyncd, (void *) vfsp,
540 CLONE_VM | CLONE_FS | CLONE_FILES);
541 if (pid < 0)
542 return -pid;
543 wait_event(vfsp->vfs_wait_sync_task, vfsp->vfs_sync_task);
544 return 0;
545 }
546
547 STATIC void
548 linvfs_stop_syncd(
549 vfs_t *vfsp)
550 {
551 vfsp->vfs_flag |= VFS_UMOUNT;
552 wmb();
553
554 wake_up_process(vfsp->vfs_sync_task);
555 wait_event(vfsp->vfs_wait_sync_task, !vfsp->vfs_sync_task);
556 }
557
558 STATIC void
559 linvfs_put_super(
560 struct super_block *sb)
561 {
562 vfs_t *vfsp = LINVFS_GET_VFS(sb);
563 int error;
564
565 linvfs_stop_syncd(vfsp);
566 VFS_SYNC(vfsp, SYNC_ATTR|SYNC_DELWRI, NULL, error);
567 if (!error)
568 VFS_UNMOUNT(vfsp, 0, NULL, error);
569 if (error) {
570 printk("XFS unmount got error %d\n", error);
571 printk("%s: vfsp/0x%p left dangling!\n", __FUNCTION__, vfsp);
572 return;
573 }
574
575 vfs_deallocate(vfsp);
576 }
577
578 STATIC void
579 linvfs_write_super(
580 struct super_block *sb)
581 {
582 vfs_t *vfsp = LINVFS_GET_VFS(sb);
583 int error;
584
585 if (sb->s_flags & MS_RDONLY) {
586 sb->s_dirt = 0; /* paranoia */
587 return;
588 }
589 /* Push the log and superblock a little */
590 VFS_SYNC(vfsp, SYNC_FSDATA, NULL, error);
591 sb->s_dirt = 0;
592 }
593
594 STATIC int
595 linvfs_sync_super(
596 struct super_block *sb,
597 int wait)
598 {
599 vfs_t *vfsp = LINVFS_GET_VFS(sb);
600 int error;
601 int flags = SYNC_FSDATA;
602
603 if (wait)
604 flags |= SYNC_WAIT;
605
606 VFS_SYNC(vfsp, flags, NULL, error);
607 sb->s_dirt = 0;
608
609 if (unlikely(laptop_mode)) {
610 int prev_sync_seq = vfsp->vfs_sync_seq;
611
612 /*
613 * The disk must be active because we're syncing.
614 * We schedule xfssyncd now (now that the disk is
615 * active) instead of later (when it might not be).
616 */
617 wake_up_process(vfsp->vfs_sync_task);
618 /*
619 * We have to wait for the sync iteration to complete.
620 * If we don't, the disk activity caused by the sync
621 * will come after the sync is completed, and that
622 * triggers another sync from laptop mode.
623 */
624 wait_event(vfsp->vfs_wait_single_sync_task,
625 vfsp->vfs_sync_seq != prev_sync_seq);
626 }
627
628 return -error;
629 }
630
631 STATIC int
632 linvfs_statfs(
633 struct super_block *sb,
634 struct kstatfs *statp)
635 {
636 vfs_t *vfsp = LINVFS_GET_VFS(sb);
637 int error;
638
639 VFS_STATVFS(vfsp, statp, NULL, error);
640 return -error;
641 }
642
643 STATIC int
644 linvfs_remount(
645 struct super_block *sb,
646 int *flags,
647 char *options)
648 {
649 vfs_t *vfsp = LINVFS_GET_VFS(sb);
650 struct xfs_mount_args *args = xfs_args_allocate(sb);
651 int error;
652
653 VFS_PARSEARGS(vfsp, options, args, 1, error);
654 if (!error)
655 VFS_MNTUPDATE(vfsp, flags, args, error);
656 kmem_free(args, sizeof(*args));
657 return -error;
658 }
659
660 STATIC void
661 linvfs_freeze_fs(
662 struct super_block *sb)
663 {
664 VFS_FREEZE(LINVFS_GET_VFS(sb));
665 }
666
667 STATIC int
668 linvfs_show_options(
669 struct seq_file *m,
670 struct vfsmount *mnt)
671 {
672 struct vfs *vfsp = LINVFS_GET_VFS(mnt->mnt_sb);
673 int error;
674
675 VFS_SHOWARGS(vfsp, m, error);
676 return error;
677 }
678
679 STATIC int
680 linvfs_getxstate(
681 struct super_block *sb,
682 struct fs_quota_stat *fqs)
683 {
684 struct vfs *vfsp = LINVFS_GET_VFS(sb);
685 int error;
686
687 VFS_QUOTACTL(vfsp, Q_XGETQSTAT, 0, (caddr_t)fqs, error);
688 return -error;
689 }
690
691 STATIC int
692 linvfs_setxstate(
693 struct super_block *sb,
694 unsigned int flags,
695 int op)
696 {
697 struct vfs *vfsp = LINVFS_GET_VFS(sb);
698 int error;
699
700 VFS_QUOTACTL(vfsp, op, 0, (caddr_t)&flags, error);
701 return -error;
702 }
703
704 STATIC int
705 linvfs_getxquota(
706 struct super_block *sb,
707 int type,
708 qid_t id,
709 struct fs_disk_quota *fdq)
710 {
711 struct vfs *vfsp = LINVFS_GET_VFS(sb);
712 int error, getmode;
713
714 getmode = (type == GRPQUOTA) ? Q_XGETGQUOTA : Q_XGETQUOTA;
715 VFS_QUOTACTL(vfsp, getmode, id, (caddr_t)fdq, error);
716 return -error;
717 }
718
719 STATIC int
720 linvfs_setxquota(
721 struct super_block *sb,
722 int type,
723 qid_t id,
724 struct fs_disk_quota *fdq)
725 {
726 struct vfs *vfsp = LINVFS_GET_VFS(sb);
727 int error, setmode;
728
729 setmode = (type == GRPQUOTA) ? Q_XSETGQLIM : Q_XSETQLIM;
730 VFS_QUOTACTL(vfsp, setmode, id, (caddr_t)fdq, error);
731 return -error;
732 }
733
734 STATIC int
735 linvfs_fill_super(
736 struct super_block *sb,
737 void *data,
738 int silent)
739 {
740 vnode_t *rootvp;
741 struct vfs *vfsp = vfs_allocate();
742 struct xfs_mount_args *args = xfs_args_allocate(sb);
743 struct kstatfs statvfs;
744 int error, error2;
745
746 vfsp->vfs_super = sb;
747 LINVFS_SET_VFS(sb, vfsp);
748 if (sb->s_flags & MS_RDONLY)
749 vfsp->vfs_flag |= VFS_RDONLY;
750 bhv_insert_all_vfsops(vfsp);
751
752 VFS_PARSEARGS(vfsp, (char *)data, args, 0, error);
753 if (error) {
754 bhv_remove_all_vfsops(vfsp, 1);
755 goto fail_vfsop;
756 }
757
758 sb_min_blocksize(sb, BBSIZE);
759 #ifdef CONFIG_XFS_EXPORT
760 sb->s_export_op = &linvfs_export_ops;
761 #endif
762 sb->s_qcop = &linvfs_qops;
763 sb->s_op = &linvfs_sops;
764
765 VFS_MOUNT(vfsp, args, NULL, error);
766 if (error) {
767 bhv_remove_all_vfsops(vfsp, 1);
768 goto fail_vfsop;
769 }
770
771 VFS_STATVFS(vfsp, &statvfs, NULL, error);
772 if (error)
773 goto fail_unmount;
774
775 sb->s_dirt = 1;
776 sb->s_magic = statvfs.f_type;
777 sb->s_blocksize = statvfs.f_bsize;
778 sb->s_blocksize_bits = ffs(statvfs.f_bsize) - 1;
779 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
780 sb->s_time_gran = 1;
781 set_posix_acl_flag(sb);
782
783 VFS_ROOT(vfsp, &rootvp, error);
784 if (error)
785 goto fail_unmount;
786
787 sb->s_root = d_alloc_root(LINVFS_GET_IP(rootvp));
788 if (!sb->s_root) {
789 error = ENOMEM;
790 goto fail_vnrele;
791 }
792 if (is_bad_inode(sb->s_root->d_inode)) {
793 error = EINVAL;
794 goto fail_vnrele;
795 }
796 if ((error = linvfs_start_syncd(vfsp)))
797 goto fail_vnrele;
798 vn_trace_exit(rootvp, __FUNCTION__, (inst_t *)__return_address);
799
800 kmem_free(args, sizeof(*args));
801 return 0;
802
803 fail_vnrele:
804 if (sb->s_root) {
805 dput(sb->s_root);
806 sb->s_root = NULL;
807 } else {
808 VN_RELE(rootvp);
809 }
810
811 fail_unmount:
812 VFS_UNMOUNT(vfsp, 0, NULL, error2);
813
814 fail_vfsop:
815 vfs_deallocate(vfsp);
816 kmem_free(args, sizeof(*args));
817 return -error;
818 }
819
820 STATIC struct super_block *
821 linvfs_get_sb(
822 struct file_system_type *fs_type,
823 int flags,
824 const char *dev_name,
825 void *data)
826 {
827 return get_sb_bdev(fs_type, flags, dev_name, data, linvfs_fill_super);
828 }
829
830 STATIC struct super_operations linvfs_sops = {
831 .alloc_inode = linvfs_alloc_inode,
832 .destroy_inode = linvfs_destroy_inode,
833 .write_inode = linvfs_write_inode,
834 .clear_inode = linvfs_clear_inode,
835 .put_super = linvfs_put_super,
836 .write_super = linvfs_write_super,
837 .sync_fs = linvfs_sync_super,
838 .write_super_lockfs = linvfs_freeze_fs,
839 .statfs = linvfs_statfs,
840 .remount_fs = linvfs_remount,
841 .show_options = linvfs_show_options,
842 };
843
844 STATIC struct quotactl_ops linvfs_qops = {
845 .get_xstate = linvfs_getxstate,
846 .set_xstate = linvfs_setxstate,
847 .get_xquota = linvfs_getxquota,
848 .set_xquota = linvfs_setxquota,
849 };
850
851 STATIC struct file_system_type xfs_fs_type = {
852 .owner = THIS_MODULE,
853 .name = "xfs",
854 .get_sb = linvfs_get_sb,
855 .kill_sb = kill_block_super,
856 .fs_flags = FS_REQUIRES_DEV,
857 };
858
859
860 STATIC int __init
861 init_xfs_fs( void )
862 {
863 int error;
864 struct sysinfo si;
865 static char message[] __initdata = KERN_INFO \
866 XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled\n";
867
868 printk(message);
869
870 si_meminfo(&si);
871 xfs_physmem = si.totalram;
872
873 ktrace_init(64);
874
875 error = init_inodecache();
876 if (error < 0)
877 goto undo_inodecache;
878
879 error = pagebuf_init();
880 if (error < 0)
881 goto undo_pagebuf;
882
883 vn_init();
884 xfs_init();
885 uuid_init();
886 vfs_initquota();
887
888 xfs_inode_shaker = kmem_shake_register(xfs_inode_shake);
889 if (!xfs_inode_shaker) {
890 error = -ENOMEM;
891 goto undo_shaker;
892 }
893
894 error = register_filesystem(&xfs_fs_type);
895 if (error)
896 goto undo_register;
897 XFS_DM_INIT(&xfs_fs_type);
898 return 0;
899
900 undo_register:
901 kmem_shake_deregister(xfs_inode_shaker);
902
903 undo_shaker:
904 pagebuf_terminate();
905
906 undo_pagebuf:
907 destroy_inodecache();
908
909 undo_inodecache:
910 return error;
911 }
912
913 STATIC void __exit
914 exit_xfs_fs( void )
915 {
916 vfs_exitquota();
917 XFS_DM_EXIT(&xfs_fs_type);
918 unregister_filesystem(&xfs_fs_type);
919 kmem_shake_deregister(xfs_inode_shaker);
920 xfs_cleanup();
921 pagebuf_terminate();
922 destroy_inodecache();
923 ktrace_uninit();
924 }
925
926 module_init(init_xfs_fs);
927 module_exit(exit_xfs_fs);
928
929 MODULE_AUTHOR("Silicon Graphics, Inc.");
930 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
931 MODULE_LICENSE("GPL");
932
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