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