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1da177e4 LT |
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 | #include "xfs_macros.h" | |
35 | #include "xfs_types.h" | |
36 | #include "xfs_inum.h" | |
37 | #include "xfs_log.h" | |
38 | #include "xfs_trans.h" | |
39 | #include "xfs_sb.h" | |
40 | #include "xfs_ag.h" | |
41 | #include "xfs_dir.h" | |
42 | #include "xfs_dir2.h" | |
43 | #include "xfs_dmapi.h" | |
44 | #include "xfs_mount.h" | |
45 | #include "xfs_alloc_btree.h" | |
46 | #include "xfs_bmap_btree.h" | |
47 | #include "xfs_ialloc_btree.h" | |
48 | #include "xfs_btree.h" | |
49 | #include "xfs_ialloc.h" | |
50 | #include "xfs_attr_sf.h" | |
51 | #include "xfs_dir_sf.h" | |
52 | #include "xfs_dir2_sf.h" | |
53 | #include "xfs_dinode.h" | |
54 | #include "xfs_inode.h" | |
55 | #include "xfs_alloc.h" | |
56 | #include "xfs_rtalloc.h" | |
57 | #include "xfs_bmap.h" | |
58 | #include "xfs_error.h" | |
59 | #include "xfs_bit.h" | |
60 | #include "xfs_rw.h" | |
61 | #include "xfs_quota.h" | |
62 | #include "xfs_fsops.h" | |
63 | ||
64 | STATIC void xfs_mount_log_sbunit(xfs_mount_t *, __int64_t); | |
65 | STATIC int xfs_uuid_mount(xfs_mount_t *); | |
66 | STATIC void xfs_uuid_unmount(xfs_mount_t *mp); | |
ba0f32d4 | 67 | STATIC void xfs_unmountfs_wait(xfs_mount_t *); |
1da177e4 LT |
68 | |
69 | static struct { | |
70 | short offset; | |
71 | short type; /* 0 = integer | |
72 | * 1 = binary / string (no translation) | |
73 | */ | |
74 | } xfs_sb_info[] = { | |
75 | { offsetof(xfs_sb_t, sb_magicnum), 0 }, | |
76 | { offsetof(xfs_sb_t, sb_blocksize), 0 }, | |
77 | { offsetof(xfs_sb_t, sb_dblocks), 0 }, | |
78 | { offsetof(xfs_sb_t, sb_rblocks), 0 }, | |
79 | { offsetof(xfs_sb_t, sb_rextents), 0 }, | |
80 | { offsetof(xfs_sb_t, sb_uuid), 1 }, | |
81 | { offsetof(xfs_sb_t, sb_logstart), 0 }, | |
82 | { offsetof(xfs_sb_t, sb_rootino), 0 }, | |
83 | { offsetof(xfs_sb_t, sb_rbmino), 0 }, | |
84 | { offsetof(xfs_sb_t, sb_rsumino), 0 }, | |
85 | { offsetof(xfs_sb_t, sb_rextsize), 0 }, | |
86 | { offsetof(xfs_sb_t, sb_agblocks), 0 }, | |
87 | { offsetof(xfs_sb_t, sb_agcount), 0 }, | |
88 | { offsetof(xfs_sb_t, sb_rbmblocks), 0 }, | |
89 | { offsetof(xfs_sb_t, sb_logblocks), 0 }, | |
90 | { offsetof(xfs_sb_t, sb_versionnum), 0 }, | |
91 | { offsetof(xfs_sb_t, sb_sectsize), 0 }, | |
92 | { offsetof(xfs_sb_t, sb_inodesize), 0 }, | |
93 | { offsetof(xfs_sb_t, sb_inopblock), 0 }, | |
94 | { offsetof(xfs_sb_t, sb_fname[0]), 1 }, | |
95 | { offsetof(xfs_sb_t, sb_blocklog), 0 }, | |
96 | { offsetof(xfs_sb_t, sb_sectlog), 0 }, | |
97 | { offsetof(xfs_sb_t, sb_inodelog), 0 }, | |
98 | { offsetof(xfs_sb_t, sb_inopblog), 0 }, | |
99 | { offsetof(xfs_sb_t, sb_agblklog), 0 }, | |
100 | { offsetof(xfs_sb_t, sb_rextslog), 0 }, | |
101 | { offsetof(xfs_sb_t, sb_inprogress), 0 }, | |
102 | { offsetof(xfs_sb_t, sb_imax_pct), 0 }, | |
103 | { offsetof(xfs_sb_t, sb_icount), 0 }, | |
104 | { offsetof(xfs_sb_t, sb_ifree), 0 }, | |
105 | { offsetof(xfs_sb_t, sb_fdblocks), 0 }, | |
106 | { offsetof(xfs_sb_t, sb_frextents), 0 }, | |
107 | { offsetof(xfs_sb_t, sb_uquotino), 0 }, | |
108 | { offsetof(xfs_sb_t, sb_gquotino), 0 }, | |
109 | { offsetof(xfs_sb_t, sb_qflags), 0 }, | |
110 | { offsetof(xfs_sb_t, sb_flags), 0 }, | |
111 | { offsetof(xfs_sb_t, sb_shared_vn), 0 }, | |
112 | { offsetof(xfs_sb_t, sb_inoalignmt), 0 }, | |
113 | { offsetof(xfs_sb_t, sb_unit), 0 }, | |
114 | { offsetof(xfs_sb_t, sb_width), 0 }, | |
115 | { offsetof(xfs_sb_t, sb_dirblklog), 0 }, | |
116 | { offsetof(xfs_sb_t, sb_logsectlog), 0 }, | |
117 | { offsetof(xfs_sb_t, sb_logsectsize),0 }, | |
118 | { offsetof(xfs_sb_t, sb_logsunit), 0 }, | |
119 | { offsetof(xfs_sb_t, sb_features2), 0 }, | |
120 | { sizeof(xfs_sb_t), 0 } | |
121 | }; | |
122 | ||
123 | /* | |
124 | * Return a pointer to an initialized xfs_mount structure. | |
125 | */ | |
126 | xfs_mount_t * | |
127 | xfs_mount_init(void) | |
128 | { | |
129 | xfs_mount_t *mp; | |
130 | ||
131 | mp = kmem_zalloc(sizeof(*mp), KM_SLEEP); | |
132 | ||
133 | AIL_LOCKINIT(&mp->m_ail_lock, "xfs_ail"); | |
134 | spinlock_init(&mp->m_sb_lock, "xfs_sb"); | |
135 | mutex_init(&mp->m_ilock, MUTEX_DEFAULT, "xfs_ilock"); | |
136 | initnsema(&mp->m_growlock, 1, "xfs_grow"); | |
137 | /* | |
138 | * Initialize the AIL. | |
139 | */ | |
140 | xfs_trans_ail_init(mp); | |
141 | ||
142 | atomic_set(&mp->m_active_trans, 0); | |
143 | ||
144 | return mp; | |
145 | } | |
146 | ||
147 | /* | |
148 | * Free up the resources associated with a mount structure. Assume that | |
149 | * the structure was initially zeroed, so we can tell which fields got | |
150 | * initialized. | |
151 | */ | |
152 | void | |
153 | xfs_mount_free( | |
154 | xfs_mount_t *mp, | |
155 | int remove_bhv) | |
156 | { | |
157 | if (mp->m_ihash) | |
158 | xfs_ihash_free(mp); | |
159 | if (mp->m_chash) | |
160 | xfs_chash_free(mp); | |
161 | ||
162 | if (mp->m_perag) { | |
163 | int agno; | |
164 | ||
165 | for (agno = 0; agno < mp->m_maxagi; agno++) | |
166 | if (mp->m_perag[agno].pagb_list) | |
167 | kmem_free(mp->m_perag[agno].pagb_list, | |
168 | sizeof(xfs_perag_busy_t) * | |
169 | XFS_PAGB_NUM_SLOTS); | |
170 | kmem_free(mp->m_perag, | |
171 | sizeof(xfs_perag_t) * mp->m_sb.sb_agcount); | |
172 | } | |
173 | ||
174 | AIL_LOCK_DESTROY(&mp->m_ail_lock); | |
175 | spinlock_destroy(&mp->m_sb_lock); | |
176 | mutex_destroy(&mp->m_ilock); | |
177 | freesema(&mp->m_growlock); | |
178 | if (mp->m_quotainfo) | |
179 | XFS_QM_DONE(mp); | |
180 | ||
181 | if (mp->m_fsname != NULL) | |
182 | kmem_free(mp->m_fsname, mp->m_fsname_len); | |
183 | ||
184 | if (remove_bhv) { | |
185 | struct vfs *vfsp = XFS_MTOVFS(mp); | |
186 | ||
187 | bhv_remove_all_vfsops(vfsp, 0); | |
188 | VFS_REMOVEBHV(vfsp, &mp->m_bhv); | |
189 | } | |
190 | ||
191 | kmem_free(mp, sizeof(xfs_mount_t)); | |
192 | } | |
193 | ||
194 | ||
195 | /* | |
196 | * Check the validity of the SB found. | |
197 | */ | |
198 | STATIC int | |
199 | xfs_mount_validate_sb( | |
200 | xfs_mount_t *mp, | |
201 | xfs_sb_t *sbp) | |
202 | { | |
203 | /* | |
204 | * If the log device and data device have the | |
205 | * same device number, the log is internal. | |
206 | * Consequently, the sb_logstart should be non-zero. If | |
207 | * we have a zero sb_logstart in this case, we may be trying to mount | |
208 | * a volume filesystem in a non-volume manner. | |
209 | */ | |
210 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { | |
211 | cmn_err(CE_WARN, "XFS: bad magic number"); | |
212 | return XFS_ERROR(EWRONGFS); | |
213 | } | |
214 | ||
215 | if (!XFS_SB_GOOD_VERSION(sbp)) { | |
216 | cmn_err(CE_WARN, "XFS: bad version"); | |
217 | return XFS_ERROR(EWRONGFS); | |
218 | } | |
219 | ||
220 | if (unlikely( | |
221 | sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { | |
222 | cmn_err(CE_WARN, | |
223 | "XFS: filesystem is marked as having an external log; " | |
224 | "specify logdev on the\nmount command line."); | |
225 | XFS_CORRUPTION_ERROR("xfs_mount_validate_sb(1)", | |
226 | XFS_ERRLEVEL_HIGH, mp, sbp); | |
227 | return XFS_ERROR(EFSCORRUPTED); | |
228 | } | |
229 | ||
230 | if (unlikely( | |
231 | sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { | |
232 | cmn_err(CE_WARN, | |
233 | "XFS: filesystem is marked as having an internal log; " | |
234 | "don't specify logdev on\nthe mount command line."); | |
235 | XFS_CORRUPTION_ERROR("xfs_mount_validate_sb(2)", | |
236 | XFS_ERRLEVEL_HIGH, mp, sbp); | |
237 | return XFS_ERROR(EFSCORRUPTED); | |
238 | } | |
239 | ||
240 | /* | |
241 | * More sanity checking. These were stolen directly from | |
242 | * xfs_repair. | |
243 | */ | |
244 | if (unlikely( | |
245 | sbp->sb_agcount <= 0 || | |
246 | sbp->sb_sectsize < XFS_MIN_SECTORSIZE || | |
247 | sbp->sb_sectsize > XFS_MAX_SECTORSIZE || | |
248 | sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || | |
249 | sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || | |
250 | sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || | |
251 | sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || | |
252 | sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || | |
253 | sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || | |
254 | sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || | |
255 | sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || | |
256 | (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || | |
257 | (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || | |
258 | sbp->sb_imax_pct > 100)) { | |
259 | cmn_err(CE_WARN, "XFS: SB sanity check 1 failed"); | |
260 | XFS_CORRUPTION_ERROR("xfs_mount_validate_sb(3)", | |
261 | XFS_ERRLEVEL_LOW, mp, sbp); | |
262 | return XFS_ERROR(EFSCORRUPTED); | |
263 | } | |
264 | ||
265 | /* | |
266 | * Sanity check AG count, size fields against data size field | |
267 | */ | |
268 | if (unlikely( | |
269 | sbp->sb_dblocks == 0 || | |
270 | sbp->sb_dblocks > | |
271 | (xfs_drfsbno_t)sbp->sb_agcount * sbp->sb_agblocks || | |
272 | sbp->sb_dblocks < (xfs_drfsbno_t)(sbp->sb_agcount - 1) * | |
273 | sbp->sb_agblocks + XFS_MIN_AG_BLOCKS)) { | |
274 | cmn_err(CE_WARN, "XFS: SB sanity check 2 failed"); | |
275 | XFS_ERROR_REPORT("xfs_mount_validate_sb(4)", | |
276 | XFS_ERRLEVEL_LOW, mp); | |
277 | return XFS_ERROR(EFSCORRUPTED); | |
278 | } | |
279 | ||
280 | ASSERT(PAGE_SHIFT >= sbp->sb_blocklog); | |
281 | ASSERT(sbp->sb_blocklog >= BBSHIFT); | |
282 | ||
283 | #if XFS_BIG_BLKNOS /* Limited by ULONG_MAX of page cache index */ | |
284 | if (unlikely( | |
285 | (sbp->sb_dblocks >> (PAGE_SHIFT - sbp->sb_blocklog)) > ULONG_MAX || | |
286 | (sbp->sb_rblocks >> (PAGE_SHIFT - sbp->sb_blocklog)) > ULONG_MAX)) { | |
287 | #else /* Limited by UINT_MAX of sectors */ | |
288 | if (unlikely( | |
289 | (sbp->sb_dblocks << (sbp->sb_blocklog - BBSHIFT)) > UINT_MAX || | |
290 | (sbp->sb_rblocks << (sbp->sb_blocklog - BBSHIFT)) > UINT_MAX)) { | |
291 | #endif | |
292 | cmn_err(CE_WARN, | |
293 | "XFS: File system is too large to be mounted on this system."); | |
294 | return XFS_ERROR(E2BIG); | |
295 | } | |
296 | ||
297 | if (unlikely(sbp->sb_inprogress)) { | |
298 | cmn_err(CE_WARN, "XFS: file system busy"); | |
299 | XFS_ERROR_REPORT("xfs_mount_validate_sb(5)", | |
300 | XFS_ERRLEVEL_LOW, mp); | |
301 | return XFS_ERROR(EFSCORRUPTED); | |
302 | } | |
303 | ||
de20614b NS |
304 | /* |
305 | * Version 1 directory format has never worked on Linux. | |
306 | */ | |
307 | if (unlikely(!XFS_SB_VERSION_HASDIRV2(sbp))) { | |
308 | cmn_err(CE_WARN, | |
309 | "XFS: Attempted to mount file system using version 1 directory format"); | |
310 | return XFS_ERROR(ENOSYS); | |
311 | } | |
312 | ||
1da177e4 LT |
313 | /* |
314 | * Until this is fixed only page-sized or smaller data blocks work. | |
315 | */ | |
316 | if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) { | |
317 | cmn_err(CE_WARN, | |
318 | "XFS: Attempted to mount file system with blocksize %d bytes", | |
319 | sbp->sb_blocksize); | |
320 | cmn_err(CE_WARN, | |
321 | "XFS: Only page-sized (%d) or less blocksizes currently work.", | |
322 | PAGE_SIZE); | |
323 | return XFS_ERROR(ENOSYS); | |
324 | } | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
329 | xfs_agnumber_t | |
330 | xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount) | |
331 | { | |
332 | xfs_agnumber_t index, max_metadata; | |
333 | xfs_perag_t *pag; | |
334 | xfs_agino_t agino; | |
335 | xfs_ino_t ino; | |
336 | xfs_sb_t *sbp = &mp->m_sb; | |
337 | xfs_ino_t max_inum = XFS_MAXINUMBER_32; | |
338 | ||
339 | /* Check to see if the filesystem can overflow 32 bit inodes */ | |
340 | agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0); | |
341 | ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino); | |
342 | ||
343 | /* Clear the mount flag if no inode can overflow 32 bits | |
344 | * on this filesystem, or if specifically requested.. | |
345 | */ | |
346 | if ((mp->m_flags & XFS_MOUNT_32BITINOOPT) && ino > max_inum) { | |
347 | mp->m_flags |= XFS_MOUNT_32BITINODES; | |
348 | } else { | |
349 | mp->m_flags &= ~XFS_MOUNT_32BITINODES; | |
350 | } | |
351 | ||
352 | /* If we can overflow then setup the ag headers accordingly */ | |
353 | if (mp->m_flags & XFS_MOUNT_32BITINODES) { | |
354 | /* Calculate how much should be reserved for inodes to | |
355 | * meet the max inode percentage. | |
356 | */ | |
357 | if (mp->m_maxicount) { | |
358 | __uint64_t icount; | |
359 | ||
360 | icount = sbp->sb_dblocks * sbp->sb_imax_pct; | |
361 | do_div(icount, 100); | |
362 | icount += sbp->sb_agblocks - 1; | |
363 | do_div(icount, mp->m_ialloc_blks); | |
364 | max_metadata = icount; | |
365 | } else { | |
366 | max_metadata = agcount; | |
367 | } | |
368 | for (index = 0; index < agcount; index++) { | |
369 | ino = XFS_AGINO_TO_INO(mp, index, agino); | |
370 | if (ino > max_inum) { | |
371 | index++; | |
372 | break; | |
373 | } | |
374 | ||
375 | /* This ag is prefered for inodes */ | |
376 | pag = &mp->m_perag[index]; | |
377 | pag->pagi_inodeok = 1; | |
378 | if (index < max_metadata) | |
379 | pag->pagf_metadata = 1; | |
380 | } | |
381 | } else { | |
382 | /* Setup default behavior for smaller filesystems */ | |
383 | for (index = 0; index < agcount; index++) { | |
384 | pag = &mp->m_perag[index]; | |
385 | pag->pagi_inodeok = 1; | |
386 | } | |
387 | } | |
388 | return index; | |
389 | } | |
390 | ||
391 | /* | |
392 | * xfs_xlatesb | |
393 | * | |
394 | * data - on disk version of sb | |
395 | * sb - a superblock | |
396 | * dir - conversion direction: <0 - convert sb to buf | |
397 | * >0 - convert buf to sb | |
398 | * fields - which fields to copy (bitmask) | |
399 | */ | |
400 | void | |
401 | xfs_xlatesb( | |
402 | void *data, | |
403 | xfs_sb_t *sb, | |
404 | int dir, | |
405 | __int64_t fields) | |
406 | { | |
407 | xfs_caddr_t buf_ptr; | |
408 | xfs_caddr_t mem_ptr; | |
409 | xfs_sb_field_t f; | |
410 | int first; | |
411 | int size; | |
412 | ||
413 | ASSERT(dir); | |
414 | ASSERT(fields); | |
415 | ||
416 | if (!fields) | |
417 | return; | |
418 | ||
419 | buf_ptr = (xfs_caddr_t)data; | |
420 | mem_ptr = (xfs_caddr_t)sb; | |
421 | ||
422 | while (fields) { | |
423 | f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields); | |
424 | first = xfs_sb_info[f].offset; | |
425 | size = xfs_sb_info[f + 1].offset - first; | |
426 | ||
427 | ASSERT(xfs_sb_info[f].type == 0 || xfs_sb_info[f].type == 1); | |
428 | ||
429 | if (size == 1 || xfs_sb_info[f].type == 1) { | |
430 | if (dir > 0) { | |
431 | memcpy(mem_ptr + first, buf_ptr + first, size); | |
432 | } else { | |
433 | memcpy(buf_ptr + first, mem_ptr + first, size); | |
434 | } | |
435 | } else { | |
436 | switch (size) { | |
437 | case 2: | |
438 | INT_XLATE(*(__uint16_t*)(buf_ptr+first), | |
439 | *(__uint16_t*)(mem_ptr+first), | |
440 | dir, ARCH_CONVERT); | |
441 | break; | |
442 | case 4: | |
443 | INT_XLATE(*(__uint32_t*)(buf_ptr+first), | |
444 | *(__uint32_t*)(mem_ptr+first), | |
445 | dir, ARCH_CONVERT); | |
446 | break; | |
447 | case 8: | |
448 | INT_XLATE(*(__uint64_t*)(buf_ptr+first), | |
449 | *(__uint64_t*)(mem_ptr+first), dir, ARCH_CONVERT); | |
450 | break; | |
451 | default: | |
452 | ASSERT(0); | |
453 | } | |
454 | } | |
455 | ||
456 | fields &= ~(1LL << f); | |
457 | } | |
458 | } | |
459 | ||
460 | /* | |
461 | * xfs_readsb | |
462 | * | |
463 | * Does the initial read of the superblock. | |
464 | */ | |
465 | int | |
466 | xfs_readsb(xfs_mount_t *mp) | |
467 | { | |
468 | unsigned int sector_size; | |
469 | unsigned int extra_flags; | |
470 | xfs_buf_t *bp; | |
471 | xfs_sb_t *sbp; | |
472 | int error; | |
473 | ||
474 | ASSERT(mp->m_sb_bp == NULL); | |
475 | ASSERT(mp->m_ddev_targp != NULL); | |
476 | ||
477 | /* | |
478 | * Allocate a (locked) buffer to hold the superblock. | |
479 | * This will be kept around at all times to optimize | |
480 | * access to the superblock. | |
481 | */ | |
482 | sector_size = xfs_getsize_buftarg(mp->m_ddev_targp); | |
483 | extra_flags = XFS_BUF_LOCK | XFS_BUF_MANAGE | XFS_BUF_MAPPED; | |
484 | ||
485 | bp = xfs_buf_read_flags(mp->m_ddev_targp, XFS_SB_DADDR, | |
486 | BTOBB(sector_size), extra_flags); | |
487 | if (!bp || XFS_BUF_ISERROR(bp)) { | |
488 | cmn_err(CE_WARN, "XFS: SB read failed"); | |
489 | error = bp ? XFS_BUF_GETERROR(bp) : ENOMEM; | |
490 | goto fail; | |
491 | } | |
492 | ASSERT(XFS_BUF_ISBUSY(bp)); | |
493 | ASSERT(XFS_BUF_VALUSEMA(bp) <= 0); | |
494 | ||
495 | /* | |
496 | * Initialize the mount structure from the superblock. | |
497 | * But first do some basic consistency checking. | |
498 | */ | |
499 | sbp = XFS_BUF_TO_SBP(bp); | |
500 | xfs_xlatesb(XFS_BUF_PTR(bp), &(mp->m_sb), 1, XFS_SB_ALL_BITS); | |
501 | ||
502 | error = xfs_mount_validate_sb(mp, &(mp->m_sb)); | |
503 | if (error) { | |
504 | cmn_err(CE_WARN, "XFS: SB validate failed"); | |
505 | goto fail; | |
506 | } | |
507 | ||
508 | /* | |
509 | * We must be able to do sector-sized and sector-aligned IO. | |
510 | */ | |
511 | if (sector_size > mp->m_sb.sb_sectsize) { | |
512 | cmn_err(CE_WARN, | |
513 | "XFS: device supports only %u byte sectors (not %u)", | |
514 | sector_size, mp->m_sb.sb_sectsize); | |
515 | error = ENOSYS; | |
516 | goto fail; | |
517 | } | |
518 | ||
519 | /* | |
520 | * If device sector size is smaller than the superblock size, | |
521 | * re-read the superblock so the buffer is correctly sized. | |
522 | */ | |
523 | if (sector_size < mp->m_sb.sb_sectsize) { | |
524 | XFS_BUF_UNMANAGE(bp); | |
525 | xfs_buf_relse(bp); | |
526 | sector_size = mp->m_sb.sb_sectsize; | |
527 | bp = xfs_buf_read_flags(mp->m_ddev_targp, XFS_SB_DADDR, | |
528 | BTOBB(sector_size), extra_flags); | |
529 | if (!bp || XFS_BUF_ISERROR(bp)) { | |
530 | cmn_err(CE_WARN, "XFS: SB re-read failed"); | |
531 | error = bp ? XFS_BUF_GETERROR(bp) : ENOMEM; | |
532 | goto fail; | |
533 | } | |
534 | ASSERT(XFS_BUF_ISBUSY(bp)); | |
535 | ASSERT(XFS_BUF_VALUSEMA(bp) <= 0); | |
536 | } | |
537 | ||
538 | mp->m_sb_bp = bp; | |
539 | xfs_buf_relse(bp); | |
540 | ASSERT(XFS_BUF_VALUSEMA(bp) > 0); | |
541 | return 0; | |
542 | ||
543 | fail: | |
544 | if (bp) { | |
545 | XFS_BUF_UNMANAGE(bp); | |
546 | xfs_buf_relse(bp); | |
547 | } | |
548 | return error; | |
549 | } | |
550 | ||
551 | ||
552 | /* | |
553 | * xfs_mount_common | |
554 | * | |
555 | * Mount initialization code establishing various mount | |
556 | * fields from the superblock associated with the given | |
557 | * mount structure | |
558 | */ | |
ba0f32d4 | 559 | STATIC void |
1da177e4 LT |
560 | xfs_mount_common(xfs_mount_t *mp, xfs_sb_t *sbp) |
561 | { | |
562 | int i; | |
563 | ||
564 | mp->m_agfrotor = mp->m_agirotor = 0; | |
565 | spinlock_init(&mp->m_agirotor_lock, "m_agirotor_lock"); | |
566 | mp->m_maxagi = mp->m_sb.sb_agcount; | |
567 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; | |
568 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; | |
569 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; | |
570 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; | |
571 | mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; | |
572 | mp->m_litino = sbp->sb_inodesize - | |
573 | ((uint)sizeof(xfs_dinode_core_t) + (uint)sizeof(xfs_agino_t)); | |
574 | mp->m_blockmask = sbp->sb_blocksize - 1; | |
575 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; | |
576 | mp->m_blockwmask = mp->m_blockwsize - 1; | |
577 | INIT_LIST_HEAD(&mp->m_del_inodes); | |
578 | ||
579 | /* | |
580 | * Setup for attributes, in case they get created. | |
581 | * This value is for inodes getting attributes for the first time, | |
582 | * the per-inode value is for old attribute values. | |
583 | */ | |
584 | ASSERT(sbp->sb_inodesize >= 256 && sbp->sb_inodesize <= 2048); | |
585 | switch (sbp->sb_inodesize) { | |
586 | case 256: | |
587 | mp->m_attroffset = XFS_LITINO(mp) - XFS_BMDR_SPACE_CALC(2); | |
588 | break; | |
589 | case 512: | |
590 | case 1024: | |
591 | case 2048: | |
592 | mp->m_attroffset = XFS_BMDR_SPACE_CALC(12); | |
593 | break; | |
594 | default: | |
595 | ASSERT(0); | |
596 | } | |
597 | ASSERT(mp->m_attroffset < XFS_LITINO(mp)); | |
598 | ||
599 | for (i = 0; i < 2; i++) { | |
600 | mp->m_alloc_mxr[i] = XFS_BTREE_BLOCK_MAXRECS(sbp->sb_blocksize, | |
601 | xfs_alloc, i == 0); | |
602 | mp->m_alloc_mnr[i] = XFS_BTREE_BLOCK_MINRECS(sbp->sb_blocksize, | |
603 | xfs_alloc, i == 0); | |
604 | } | |
605 | for (i = 0; i < 2; i++) { | |
606 | mp->m_bmap_dmxr[i] = XFS_BTREE_BLOCK_MAXRECS(sbp->sb_blocksize, | |
607 | xfs_bmbt, i == 0); | |
608 | mp->m_bmap_dmnr[i] = XFS_BTREE_BLOCK_MINRECS(sbp->sb_blocksize, | |
609 | xfs_bmbt, i == 0); | |
610 | } | |
611 | for (i = 0; i < 2; i++) { | |
612 | mp->m_inobt_mxr[i] = XFS_BTREE_BLOCK_MAXRECS(sbp->sb_blocksize, | |
613 | xfs_inobt, i == 0); | |
614 | mp->m_inobt_mnr[i] = XFS_BTREE_BLOCK_MINRECS(sbp->sb_blocksize, | |
615 | xfs_inobt, i == 0); | |
616 | } | |
617 | ||
618 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); | |
619 | mp->m_ialloc_inos = (int)MAX((__uint16_t)XFS_INODES_PER_CHUNK, | |
620 | sbp->sb_inopblock); | |
621 | mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog; | |
622 | } | |
623 | /* | |
624 | * xfs_mountfs | |
625 | * | |
626 | * This function does the following on an initial mount of a file system: | |
627 | * - reads the superblock from disk and init the mount struct | |
628 | * - if we're a 32-bit kernel, do a size check on the superblock | |
629 | * so we don't mount terabyte filesystems | |
630 | * - init mount struct realtime fields | |
631 | * - allocate inode hash table for fs | |
632 | * - init directory manager | |
633 | * - perform recovery and init the log manager | |
634 | */ | |
635 | int | |
636 | xfs_mountfs( | |
637 | vfs_t *vfsp, | |
638 | xfs_mount_t *mp, | |
639 | int mfsi_flags) | |
640 | { | |
641 | xfs_buf_t *bp; | |
642 | xfs_sb_t *sbp = &(mp->m_sb); | |
643 | xfs_inode_t *rip; | |
644 | vnode_t *rvp = NULL; | |
645 | int readio_log, writeio_log; | |
646 | xfs_daddr_t d; | |
647 | __uint64_t ret64; | |
648 | __int64_t update_flags; | |
649 | uint quotamount, quotaflags; | |
650 | int agno; | |
651 | int uuid_mounted = 0; | |
652 | int error = 0; | |
653 | ||
654 | if (mp->m_sb_bp == NULL) { | |
655 | if ((error = xfs_readsb(mp))) { | |
656 | return (error); | |
657 | } | |
658 | } | |
659 | xfs_mount_common(mp, sbp); | |
660 | ||
661 | /* | |
662 | * Check if sb_agblocks is aligned at stripe boundary | |
663 | * If sb_agblocks is NOT aligned turn off m_dalign since | |
664 | * allocator alignment is within an ag, therefore ag has | |
665 | * to be aligned at stripe boundary. | |
666 | */ | |
667 | update_flags = 0LL; | |
668 | if (mp->m_dalign && !(mfsi_flags & XFS_MFSI_SECOND)) { | |
669 | /* | |
670 | * If stripe unit and stripe width are not multiples | |
671 | * of the fs blocksize turn off alignment. | |
672 | */ | |
673 | if ((BBTOB(mp->m_dalign) & mp->m_blockmask) || | |
674 | (BBTOB(mp->m_swidth) & mp->m_blockmask)) { | |
675 | if (mp->m_flags & XFS_MOUNT_RETERR) { | |
676 | cmn_err(CE_WARN, | |
677 | "XFS: alignment check 1 failed"); | |
678 | error = XFS_ERROR(EINVAL); | |
679 | goto error1; | |
680 | } | |
681 | mp->m_dalign = mp->m_swidth = 0; | |
682 | } else { | |
683 | /* | |
684 | * Convert the stripe unit and width to FSBs. | |
685 | */ | |
686 | mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign); | |
687 | if (mp->m_dalign && (sbp->sb_agblocks % mp->m_dalign)) { | |
688 | if (mp->m_flags & XFS_MOUNT_RETERR) { | |
689 | error = XFS_ERROR(EINVAL); | |
690 | goto error1; | |
691 | } | |
692 | xfs_fs_cmn_err(CE_WARN, mp, | |
693 | "stripe alignment turned off: sunit(%d)/swidth(%d) incompatible with agsize(%d)", | |
694 | mp->m_dalign, mp->m_swidth, | |
695 | sbp->sb_agblocks); | |
696 | ||
697 | mp->m_dalign = 0; | |
698 | mp->m_swidth = 0; | |
699 | } else if (mp->m_dalign) { | |
700 | mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth); | |
701 | } else { | |
702 | if (mp->m_flags & XFS_MOUNT_RETERR) { | |
703 | xfs_fs_cmn_err(CE_WARN, mp, | |
704 | "stripe alignment turned off: sunit(%d) less than bsize(%d)", | |
705 | mp->m_dalign, | |
706 | mp->m_blockmask +1); | |
707 | error = XFS_ERROR(EINVAL); | |
708 | goto error1; | |
709 | } | |
710 | mp->m_swidth = 0; | |
711 | } | |
712 | } | |
713 | ||
714 | /* | |
715 | * Update superblock with new values | |
716 | * and log changes | |
717 | */ | |
718 | if (XFS_SB_VERSION_HASDALIGN(sbp)) { | |
719 | if (sbp->sb_unit != mp->m_dalign) { | |
720 | sbp->sb_unit = mp->m_dalign; | |
721 | update_flags |= XFS_SB_UNIT; | |
722 | } | |
723 | if (sbp->sb_width != mp->m_swidth) { | |
724 | sbp->sb_width = mp->m_swidth; | |
725 | update_flags |= XFS_SB_WIDTH; | |
726 | } | |
727 | } | |
728 | } else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN && | |
729 | XFS_SB_VERSION_HASDALIGN(&mp->m_sb)) { | |
730 | mp->m_dalign = sbp->sb_unit; | |
731 | mp->m_swidth = sbp->sb_width; | |
732 | } | |
733 | ||
734 | xfs_alloc_compute_maxlevels(mp); | |
735 | xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK); | |
736 | xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK); | |
737 | xfs_ialloc_compute_maxlevels(mp); | |
738 | ||
739 | if (sbp->sb_imax_pct) { | |
740 | __uint64_t icount; | |
741 | ||
742 | /* Make sure the maximum inode count is a multiple of the | |
743 | * units we allocate inodes in. | |
744 | */ | |
745 | ||
746 | icount = sbp->sb_dblocks * sbp->sb_imax_pct; | |
747 | do_div(icount, 100); | |
748 | do_div(icount, mp->m_ialloc_blks); | |
749 | mp->m_maxicount = (icount * mp->m_ialloc_blks) << | |
750 | sbp->sb_inopblog; | |
751 | } else | |
752 | mp->m_maxicount = 0; | |
753 | ||
754 | mp->m_maxioffset = xfs_max_file_offset(sbp->sb_blocklog); | |
755 | ||
756 | /* | |
757 | * XFS uses the uuid from the superblock as the unique | |
758 | * identifier for fsid. We can not use the uuid from the volume | |
759 | * since a single partition filesystem is identical to a single | |
760 | * partition volume/filesystem. | |
761 | */ | |
762 | if ((mfsi_flags & XFS_MFSI_SECOND) == 0 && | |
763 | (mp->m_flags & XFS_MOUNT_NOUUID) == 0) { | |
764 | if (xfs_uuid_mount(mp)) { | |
765 | error = XFS_ERROR(EINVAL); | |
766 | goto error1; | |
767 | } | |
768 | uuid_mounted=1; | |
769 | ret64 = uuid_hash64(&sbp->sb_uuid); | |
770 | memcpy(&vfsp->vfs_fsid, &ret64, sizeof(ret64)); | |
771 | } | |
772 | ||
773 | /* | |
774 | * Set the default minimum read and write sizes unless | |
775 | * already specified in a mount option. | |
776 | * We use smaller I/O sizes when the file system | |
777 | * is being used for NFS service (wsync mount option). | |
778 | */ | |
779 | if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) { | |
780 | if (mp->m_flags & XFS_MOUNT_WSYNC) { | |
781 | readio_log = XFS_WSYNC_READIO_LOG; | |
782 | writeio_log = XFS_WSYNC_WRITEIO_LOG; | |
783 | } else { | |
784 | readio_log = XFS_READIO_LOG_LARGE; | |
785 | writeio_log = XFS_WRITEIO_LOG_LARGE; | |
786 | } | |
787 | } else { | |
788 | readio_log = mp->m_readio_log; | |
789 | writeio_log = mp->m_writeio_log; | |
790 | } | |
791 | ||
792 | /* | |
793 | * Set the number of readahead buffers to use based on | |
794 | * physical memory size. | |
795 | */ | |
796 | if (xfs_physmem <= 4096) /* <= 16MB */ | |
797 | mp->m_nreadaheads = XFS_RW_NREADAHEAD_16MB; | |
798 | else if (xfs_physmem <= 8192) /* <= 32MB */ | |
799 | mp->m_nreadaheads = XFS_RW_NREADAHEAD_32MB; | |
800 | else | |
801 | mp->m_nreadaheads = XFS_RW_NREADAHEAD_K32; | |
802 | if (sbp->sb_blocklog > readio_log) { | |
803 | mp->m_readio_log = sbp->sb_blocklog; | |
804 | } else { | |
805 | mp->m_readio_log = readio_log; | |
806 | } | |
807 | mp->m_readio_blocks = 1 << (mp->m_readio_log - sbp->sb_blocklog); | |
808 | if (sbp->sb_blocklog > writeio_log) { | |
809 | mp->m_writeio_log = sbp->sb_blocklog; | |
810 | } else { | |
811 | mp->m_writeio_log = writeio_log; | |
812 | } | |
813 | mp->m_writeio_blocks = 1 << (mp->m_writeio_log - sbp->sb_blocklog); | |
814 | ||
815 | /* | |
816 | * Set the inode cluster size based on the physical memory | |
817 | * size. This may still be overridden by the file system | |
818 | * block size if it is larger than the chosen cluster size. | |
819 | */ | |
820 | if (xfs_physmem <= btoc(32 * 1024 * 1024)) { /* <= 32 MB */ | |
821 | mp->m_inode_cluster_size = XFS_INODE_SMALL_CLUSTER_SIZE; | |
822 | } else { | |
823 | mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE; | |
824 | } | |
825 | /* | |
826 | * Set whether we're using inode alignment. | |
827 | */ | |
828 | if (XFS_SB_VERSION_HASALIGN(&mp->m_sb) && | |
829 | mp->m_sb.sb_inoalignmt >= | |
830 | XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)) | |
831 | mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1; | |
832 | else | |
833 | mp->m_inoalign_mask = 0; | |
834 | /* | |
835 | * If we are using stripe alignment, check whether | |
836 | * the stripe unit is a multiple of the inode alignment | |
837 | */ | |
838 | if (mp->m_dalign && mp->m_inoalign_mask && | |
839 | !(mp->m_dalign & mp->m_inoalign_mask)) | |
840 | mp->m_sinoalign = mp->m_dalign; | |
841 | else | |
842 | mp->m_sinoalign = 0; | |
843 | /* | |
844 | * Check that the data (and log if separate) are an ok size. | |
845 | */ | |
846 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks); | |
847 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) { | |
848 | cmn_err(CE_WARN, "XFS: size check 1 failed"); | |
849 | error = XFS_ERROR(E2BIG); | |
850 | goto error1; | |
851 | } | |
852 | error = xfs_read_buf(mp, mp->m_ddev_targp, | |
853 | d - XFS_FSS_TO_BB(mp, 1), | |
854 | XFS_FSS_TO_BB(mp, 1), 0, &bp); | |
855 | if (!error) { | |
856 | xfs_buf_relse(bp); | |
857 | } else { | |
858 | cmn_err(CE_WARN, "XFS: size check 2 failed"); | |
859 | if (error == ENOSPC) { | |
860 | error = XFS_ERROR(E2BIG); | |
861 | } | |
862 | goto error1; | |
863 | } | |
864 | ||
865 | if (((mfsi_flags & XFS_MFSI_CLIENT) == 0) && | |
866 | mp->m_logdev_targp != mp->m_ddev_targp) { | |
867 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks); | |
868 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) { | |
869 | cmn_err(CE_WARN, "XFS: size check 3 failed"); | |
870 | error = XFS_ERROR(E2BIG); | |
871 | goto error1; | |
872 | } | |
873 | error = xfs_read_buf(mp, mp->m_logdev_targp, | |
874 | d - XFS_FSB_TO_BB(mp, 1), | |
875 | XFS_FSB_TO_BB(mp, 1), 0, &bp); | |
876 | if (!error) { | |
877 | xfs_buf_relse(bp); | |
878 | } else { | |
879 | cmn_err(CE_WARN, "XFS: size check 3 failed"); | |
880 | if (error == ENOSPC) { | |
881 | error = XFS_ERROR(E2BIG); | |
882 | } | |
883 | goto error1; | |
884 | } | |
885 | } | |
886 | ||
887 | /* | |
888 | * Initialize realtime fields in the mount structure | |
889 | */ | |
890 | if ((error = xfs_rtmount_init(mp))) { | |
891 | cmn_err(CE_WARN, "XFS: RT mount failed"); | |
892 | goto error1; | |
893 | } | |
894 | ||
895 | /* | |
896 | * For client case we are done now | |
897 | */ | |
898 | if (mfsi_flags & XFS_MFSI_CLIENT) { | |
899 | return(0); | |
900 | } | |
901 | ||
902 | /* | |
903 | * Copies the low order bits of the timestamp and the randomly | |
904 | * set "sequence" number out of a UUID. | |
905 | */ | |
906 | uuid_getnodeuniq(&sbp->sb_uuid, mp->m_fixedfsid); | |
907 | ||
908 | /* | |
909 | * The vfs structure needs to have a file system independent | |
910 | * way of checking for the invariant file system ID. Since it | |
911 | * can't look at mount structures it has a pointer to the data | |
912 | * in the mount structure. | |
913 | * | |
914 | * File systems that don't support user level file handles (i.e. | |
915 | * all of them except for XFS) will leave vfs_altfsid as NULL. | |
916 | */ | |
917 | vfsp->vfs_altfsid = (xfs_fsid_t *)mp->m_fixedfsid; | |
918 | mp->m_dmevmask = 0; /* not persistent; set after each mount */ | |
919 | ||
920 | /* | |
921 | * Select the right directory manager. | |
922 | */ | |
923 | mp->m_dirops = | |
924 | XFS_SB_VERSION_HASDIRV2(&mp->m_sb) ? | |
925 | xfsv2_dirops : | |
926 | xfsv1_dirops; | |
927 | ||
928 | /* | |
929 | * Initialize directory manager's entries. | |
930 | */ | |
931 | XFS_DIR_MOUNT(mp); | |
932 | ||
933 | /* | |
934 | * Initialize the attribute manager's entries. | |
935 | */ | |
936 | mp->m_attr_magicpct = (mp->m_sb.sb_blocksize * 37) / 100; | |
937 | ||
938 | /* | |
939 | * Initialize the precomputed transaction reservations values. | |
940 | */ | |
941 | xfs_trans_init(mp); | |
942 | ||
943 | /* | |
944 | * Allocate and initialize the inode hash table for this | |
945 | * file system. | |
946 | */ | |
947 | xfs_ihash_init(mp); | |
948 | xfs_chash_init(mp); | |
949 | ||
950 | /* | |
951 | * Allocate and initialize the per-ag data. | |
952 | */ | |
953 | init_rwsem(&mp->m_peraglock); | |
954 | mp->m_perag = | |
955 | kmem_zalloc(sbp->sb_agcount * sizeof(xfs_perag_t), KM_SLEEP); | |
956 | ||
957 | mp->m_maxagi = xfs_initialize_perag(mp, sbp->sb_agcount); | |
958 | ||
959 | /* | |
960 | * log's mount-time initialization. Perform 1st part recovery if needed | |
961 | */ | |
962 | if (likely(sbp->sb_logblocks > 0)) { /* check for volume case */ | |
963 | error = xfs_log_mount(mp, mp->m_logdev_targp, | |
964 | XFS_FSB_TO_DADDR(mp, sbp->sb_logstart), | |
965 | XFS_FSB_TO_BB(mp, sbp->sb_logblocks)); | |
966 | if (error) { | |
967 | cmn_err(CE_WARN, "XFS: log mount failed"); | |
968 | goto error2; | |
969 | } | |
970 | } else { /* No log has been defined */ | |
971 | cmn_err(CE_WARN, "XFS: no log defined"); | |
972 | XFS_ERROR_REPORT("xfs_mountfs_int(1)", XFS_ERRLEVEL_LOW, mp); | |
973 | error = XFS_ERROR(EFSCORRUPTED); | |
974 | goto error2; | |
975 | } | |
976 | ||
977 | /* | |
978 | * Get and sanity-check the root inode. | |
979 | * Save the pointer to it in the mount structure. | |
980 | */ | |
981 | error = xfs_iget(mp, NULL, sbp->sb_rootino, 0, XFS_ILOCK_EXCL, &rip, 0); | |
982 | if (error) { | |
983 | cmn_err(CE_WARN, "XFS: failed to read root inode"); | |
984 | goto error3; | |
985 | } | |
986 | ||
987 | ASSERT(rip != NULL); | |
988 | rvp = XFS_ITOV(rip); | |
989 | ||
990 | if (unlikely((rip->i_d.di_mode & S_IFMT) != S_IFDIR)) { | |
991 | cmn_err(CE_WARN, "XFS: corrupted root inode"); | |
992 | prdev("Root inode %llu is not a directory", | |
993 | mp->m_ddev_targp, (unsigned long long)rip->i_ino); | |
994 | xfs_iunlock(rip, XFS_ILOCK_EXCL); | |
995 | XFS_ERROR_REPORT("xfs_mountfs_int(2)", XFS_ERRLEVEL_LOW, | |
996 | mp); | |
997 | error = XFS_ERROR(EFSCORRUPTED); | |
998 | goto error4; | |
999 | } | |
1000 | mp->m_rootip = rip; /* save it */ | |
1001 | ||
1002 | xfs_iunlock(rip, XFS_ILOCK_EXCL); | |
1003 | ||
1004 | /* | |
1005 | * Initialize realtime inode pointers in the mount structure | |
1006 | */ | |
1007 | if ((error = xfs_rtmount_inodes(mp))) { | |
1008 | /* | |
1009 | * Free up the root inode. | |
1010 | */ | |
1011 | cmn_err(CE_WARN, "XFS: failed to read RT inodes"); | |
1012 | goto error4; | |
1013 | } | |
1014 | ||
1015 | /* | |
1016 | * If fs is not mounted readonly, then update the superblock | |
1017 | * unit and width changes. | |
1018 | */ | |
1019 | if (update_flags && !(vfsp->vfs_flag & VFS_RDONLY)) | |
1020 | xfs_mount_log_sbunit(mp, update_flags); | |
1021 | ||
1022 | /* | |
1023 | * Initialise the XFS quota management subsystem for this mount | |
1024 | */ | |
1025 | if ((error = XFS_QM_INIT(mp, "amount, "aflags))) | |
1026 | goto error4; | |
1027 | ||
1028 | /* | |
1029 | * Finish recovering the file system. This part needed to be | |
1030 | * delayed until after the root and real-time bitmap inodes | |
1031 | * were consistently read in. | |
1032 | */ | |
1033 | error = xfs_log_mount_finish(mp, mfsi_flags); | |
1034 | if (error) { | |
1035 | cmn_err(CE_WARN, "XFS: log mount finish failed"); | |
1036 | goto error4; | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Complete the quota initialisation, post-log-replay component. | |
1041 | */ | |
1042 | if ((error = XFS_QM_MOUNT(mp, quotamount, quotaflags, mfsi_flags))) | |
1043 | goto error4; | |
1044 | ||
1045 | return 0; | |
1046 | ||
1047 | error4: | |
1048 | /* | |
1049 | * Free up the root inode. | |
1050 | */ | |
1051 | VN_RELE(rvp); | |
1052 | error3: | |
1053 | xfs_log_unmount_dealloc(mp); | |
1054 | error2: | |
1055 | xfs_ihash_free(mp); | |
1056 | xfs_chash_free(mp); | |
1057 | for (agno = 0; agno < sbp->sb_agcount; agno++) | |
1058 | if (mp->m_perag[agno].pagb_list) | |
1059 | kmem_free(mp->m_perag[agno].pagb_list, | |
1060 | sizeof(xfs_perag_busy_t) * XFS_PAGB_NUM_SLOTS); | |
1061 | kmem_free(mp->m_perag, sbp->sb_agcount * sizeof(xfs_perag_t)); | |
1062 | mp->m_perag = NULL; | |
1063 | /* FALLTHROUGH */ | |
1064 | error1: | |
1065 | if (uuid_mounted) | |
1066 | xfs_uuid_unmount(mp); | |
1067 | xfs_freesb(mp); | |
1068 | return error; | |
1069 | } | |
1070 | ||
1071 | /* | |
1072 | * xfs_unmountfs | |
1073 | * | |
1074 | * This flushes out the inodes,dquots and the superblock, unmounts the | |
1075 | * log and makes sure that incore structures are freed. | |
1076 | */ | |
1077 | int | |
1078 | xfs_unmountfs(xfs_mount_t *mp, struct cred *cr) | |
1079 | { | |
1080 | struct vfs *vfsp = XFS_MTOVFS(mp); | |
1081 | #if defined(DEBUG) || defined(INDUCE_IO_ERROR) | |
1082 | int64_t fsid; | |
1083 | #endif | |
1084 | ||
efa80278 | 1085 | xfs_iflush_all(mp); |
1da177e4 LT |
1086 | |
1087 | XFS_QM_DQPURGEALL(mp, | |
1088 | XFS_QMOPT_UQUOTA | XFS_QMOPT_GQUOTA | XFS_QMOPT_UMOUNTING); | |
1089 | ||
1090 | /* | |
1091 | * Flush out the log synchronously so that we know for sure | |
1092 | * that nothing is pinned. This is important because bflush() | |
1093 | * will skip pinned buffers. | |
1094 | */ | |
1095 | xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC); | |
1096 | ||
1097 | xfs_binval(mp->m_ddev_targp); | |
1098 | if (mp->m_rtdev_targp) { | |
1099 | xfs_binval(mp->m_rtdev_targp); | |
1100 | } | |
1101 | ||
1102 | xfs_unmountfs_writesb(mp); | |
1103 | ||
1104 | xfs_unmountfs_wait(mp); /* wait for async bufs */ | |
1105 | ||
1106 | xfs_log_unmount(mp); /* Done! No more fs ops. */ | |
1107 | ||
1108 | xfs_freesb(mp); | |
1109 | ||
1110 | /* | |
1111 | * All inodes from this mount point should be freed. | |
1112 | */ | |
1113 | ASSERT(mp->m_inodes == NULL); | |
1114 | ||
1da177e4 LT |
1115 | xfs_unmountfs_close(mp, cr); |
1116 | if ((mp->m_flags & XFS_MOUNT_NOUUID) == 0) | |
1117 | xfs_uuid_unmount(mp); | |
1118 | ||
1119 | #if defined(DEBUG) || defined(INDUCE_IO_ERROR) | |
1120 | /* | |
1121 | * clear all error tags on this filesystem | |
1122 | */ | |
1123 | memcpy(&fsid, &vfsp->vfs_fsid, sizeof(int64_t)); | |
1124 | xfs_errortag_clearall_umount(fsid, mp->m_fsname, 0); | |
1125 | #endif | |
1126 | XFS_IODONE(vfsp); | |
1127 | xfs_mount_free(mp, 1); | |
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | void | |
1132 | xfs_unmountfs_close(xfs_mount_t *mp, struct cred *cr) | |
1133 | { | |
1134 | if (mp->m_logdev_targp != mp->m_ddev_targp) | |
1135 | xfs_free_buftarg(mp->m_logdev_targp, 1); | |
1136 | if (mp->m_rtdev_targp) | |
1137 | xfs_free_buftarg(mp->m_rtdev_targp, 1); | |
1138 | xfs_free_buftarg(mp->m_ddev_targp, 0); | |
1139 | } | |
1140 | ||
ba0f32d4 | 1141 | STATIC void |
1da177e4 LT |
1142 | xfs_unmountfs_wait(xfs_mount_t *mp) |
1143 | { | |
1144 | if (mp->m_logdev_targp != mp->m_ddev_targp) | |
1145 | xfs_wait_buftarg(mp->m_logdev_targp); | |
1146 | if (mp->m_rtdev_targp) | |
1147 | xfs_wait_buftarg(mp->m_rtdev_targp); | |
1148 | xfs_wait_buftarg(mp->m_ddev_targp); | |
1149 | } | |
1150 | ||
1151 | int | |
1152 | xfs_unmountfs_writesb(xfs_mount_t *mp) | |
1153 | { | |
1154 | xfs_buf_t *sbp; | |
1155 | xfs_sb_t *sb; | |
1156 | int error = 0; | |
1157 | ||
1158 | /* | |
1159 | * skip superblock write if fs is read-only, or | |
1160 | * if we are doing a forced umount. | |
1161 | */ | |
1162 | sbp = xfs_getsb(mp, 0); | |
1163 | if (!(XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY || | |
1164 | XFS_FORCED_SHUTDOWN(mp))) { | |
1165 | /* | |
1166 | * mark shared-readonly if desired | |
1167 | */ | |
1168 | sb = XFS_BUF_TO_SBP(sbp); | |
1169 | if (mp->m_mk_sharedro) { | |
1170 | if (!(sb->sb_flags & XFS_SBF_READONLY)) | |
1171 | sb->sb_flags |= XFS_SBF_READONLY; | |
1172 | if (!XFS_SB_VERSION_HASSHARED(sb)) | |
1173 | XFS_SB_VERSION_ADDSHARED(sb); | |
1174 | xfs_fs_cmn_err(CE_NOTE, mp, | |
1175 | "Unmounting, marking shared read-only"); | |
1176 | } | |
1177 | XFS_BUF_UNDONE(sbp); | |
1178 | XFS_BUF_UNREAD(sbp); | |
1179 | XFS_BUF_UNDELAYWRITE(sbp); | |
1180 | XFS_BUF_WRITE(sbp); | |
1181 | XFS_BUF_UNASYNC(sbp); | |
1182 | ASSERT(XFS_BUF_TARGET(sbp) == mp->m_ddev_targp); | |
1183 | xfsbdstrat(mp, sbp); | |
1184 | /* Nevermind errors we might get here. */ | |
1185 | error = xfs_iowait(sbp); | |
1186 | if (error) | |
1187 | xfs_ioerror_alert("xfs_unmountfs_writesb", | |
1188 | mp, sbp, XFS_BUF_ADDR(sbp)); | |
1189 | if (error && mp->m_mk_sharedro) | |
1190 | xfs_fs_cmn_err(CE_ALERT, mp, "Superblock write error detected while unmounting. Filesystem may not be marked shared readonly"); | |
1191 | } | |
1192 | xfs_buf_relse(sbp); | |
1193 | return (error); | |
1194 | } | |
1195 | ||
1196 | /* | |
1197 | * xfs_mod_sb() can be used to copy arbitrary changes to the | |
1198 | * in-core superblock into the superblock buffer to be logged. | |
1199 | * It does not provide the higher level of locking that is | |
1200 | * needed to protect the in-core superblock from concurrent | |
1201 | * access. | |
1202 | */ | |
1203 | void | |
1204 | xfs_mod_sb(xfs_trans_t *tp, __int64_t fields) | |
1205 | { | |
1206 | xfs_buf_t *bp; | |
1207 | int first; | |
1208 | int last; | |
1209 | xfs_mount_t *mp; | |
1210 | xfs_sb_t *sbp; | |
1211 | xfs_sb_field_t f; | |
1212 | ||
1213 | ASSERT(fields); | |
1214 | if (!fields) | |
1215 | return; | |
1216 | mp = tp->t_mountp; | |
1217 | bp = xfs_trans_getsb(tp, mp, 0); | |
1218 | sbp = XFS_BUF_TO_SBP(bp); | |
1219 | first = sizeof(xfs_sb_t); | |
1220 | last = 0; | |
1221 | ||
1222 | /* translate/copy */ | |
1223 | ||
1224 | xfs_xlatesb(XFS_BUF_PTR(bp), &(mp->m_sb), -1, fields); | |
1225 | ||
1226 | /* find modified range */ | |
1227 | ||
1228 | f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields); | |
1229 | ASSERT((1LL << f) & XFS_SB_MOD_BITS); | |
1230 | first = xfs_sb_info[f].offset; | |
1231 | ||
1232 | f = (xfs_sb_field_t)xfs_highbit64((__uint64_t)fields); | |
1233 | ASSERT((1LL << f) & XFS_SB_MOD_BITS); | |
1234 | last = xfs_sb_info[f + 1].offset - 1; | |
1235 | ||
1236 | xfs_trans_log_buf(tp, bp, first, last); | |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | * xfs_mod_incore_sb_unlocked() is a utility routine common used to apply | |
1241 | * a delta to a specified field in the in-core superblock. Simply | |
1242 | * switch on the field indicated and apply the delta to that field. | |
1243 | * Fields are not allowed to dip below zero, so if the delta would | |
1244 | * do this do not apply it and return EINVAL. | |
1245 | * | |
1246 | * The SB_LOCK must be held when this routine is called. | |
1247 | */ | |
1248 | STATIC int | |
1249 | xfs_mod_incore_sb_unlocked(xfs_mount_t *mp, xfs_sb_field_t field, | |
1250 | int delta, int rsvd) | |
1251 | { | |
1252 | int scounter; /* short counter for 32 bit fields */ | |
1253 | long long lcounter; /* long counter for 64 bit fields */ | |
1254 | long long res_used, rem; | |
1255 | ||
1256 | /* | |
1257 | * With the in-core superblock spin lock held, switch | |
1258 | * on the indicated field. Apply the delta to the | |
1259 | * proper field. If the fields value would dip below | |
1260 | * 0, then do not apply the delta and return EINVAL. | |
1261 | */ | |
1262 | switch (field) { | |
1263 | case XFS_SBS_ICOUNT: | |
1264 | lcounter = (long long)mp->m_sb.sb_icount; | |
1265 | lcounter += delta; | |
1266 | if (lcounter < 0) { | |
1267 | ASSERT(0); | |
1268 | return (XFS_ERROR(EINVAL)); | |
1269 | } | |
1270 | mp->m_sb.sb_icount = lcounter; | |
1271 | return (0); | |
1272 | case XFS_SBS_IFREE: | |
1273 | lcounter = (long long)mp->m_sb.sb_ifree; | |
1274 | lcounter += delta; | |
1275 | if (lcounter < 0) { | |
1276 | ASSERT(0); | |
1277 | return (XFS_ERROR(EINVAL)); | |
1278 | } | |
1279 | mp->m_sb.sb_ifree = lcounter; | |
1280 | return (0); | |
1281 | case XFS_SBS_FDBLOCKS: | |
1282 | ||
1283 | lcounter = (long long)mp->m_sb.sb_fdblocks; | |
1284 | res_used = (long long)(mp->m_resblks - mp->m_resblks_avail); | |
1285 | ||
1286 | if (delta > 0) { /* Putting blocks back */ | |
1287 | if (res_used > delta) { | |
1288 | mp->m_resblks_avail += delta; | |
1289 | } else { | |
1290 | rem = delta - res_used; | |
1291 | mp->m_resblks_avail = mp->m_resblks; | |
1292 | lcounter += rem; | |
1293 | } | |
1294 | } else { /* Taking blocks away */ | |
1295 | ||
1296 | lcounter += delta; | |
1297 | ||
1298 | /* | |
1299 | * If were out of blocks, use any available reserved blocks if | |
1300 | * were allowed to. | |
1301 | */ | |
1302 | ||
1303 | if (lcounter < 0) { | |
1304 | if (rsvd) { | |
1305 | lcounter = (long long)mp->m_resblks_avail + delta; | |
1306 | if (lcounter < 0) { | |
1307 | return (XFS_ERROR(ENOSPC)); | |
1308 | } | |
1309 | mp->m_resblks_avail = lcounter; | |
1310 | return (0); | |
1311 | } else { /* not reserved */ | |
1312 | return (XFS_ERROR(ENOSPC)); | |
1313 | } | |
1314 | } | |
1315 | } | |
1316 | ||
1317 | mp->m_sb.sb_fdblocks = lcounter; | |
1318 | return (0); | |
1319 | case XFS_SBS_FREXTENTS: | |
1320 | lcounter = (long long)mp->m_sb.sb_frextents; | |
1321 | lcounter += delta; | |
1322 | if (lcounter < 0) { | |
1323 | return (XFS_ERROR(ENOSPC)); | |
1324 | } | |
1325 | mp->m_sb.sb_frextents = lcounter; | |
1326 | return (0); | |
1327 | case XFS_SBS_DBLOCKS: | |
1328 | lcounter = (long long)mp->m_sb.sb_dblocks; | |
1329 | lcounter += delta; | |
1330 | if (lcounter < 0) { | |
1331 | ASSERT(0); | |
1332 | return (XFS_ERROR(EINVAL)); | |
1333 | } | |
1334 | mp->m_sb.sb_dblocks = lcounter; | |
1335 | return (0); | |
1336 | case XFS_SBS_AGCOUNT: | |
1337 | scounter = mp->m_sb.sb_agcount; | |
1338 | scounter += delta; | |
1339 | if (scounter < 0) { | |
1340 | ASSERT(0); | |
1341 | return (XFS_ERROR(EINVAL)); | |
1342 | } | |
1343 | mp->m_sb.sb_agcount = scounter; | |
1344 | return (0); | |
1345 | case XFS_SBS_IMAX_PCT: | |
1346 | scounter = mp->m_sb.sb_imax_pct; | |
1347 | scounter += delta; | |
1348 | if (scounter < 0) { | |
1349 | ASSERT(0); | |
1350 | return (XFS_ERROR(EINVAL)); | |
1351 | } | |
1352 | mp->m_sb.sb_imax_pct = scounter; | |
1353 | return (0); | |
1354 | case XFS_SBS_REXTSIZE: | |
1355 | scounter = mp->m_sb.sb_rextsize; | |
1356 | scounter += delta; | |
1357 | if (scounter < 0) { | |
1358 | ASSERT(0); | |
1359 | return (XFS_ERROR(EINVAL)); | |
1360 | } | |
1361 | mp->m_sb.sb_rextsize = scounter; | |
1362 | return (0); | |
1363 | case XFS_SBS_RBMBLOCKS: | |
1364 | scounter = mp->m_sb.sb_rbmblocks; | |
1365 | scounter += delta; | |
1366 | if (scounter < 0) { | |
1367 | ASSERT(0); | |
1368 | return (XFS_ERROR(EINVAL)); | |
1369 | } | |
1370 | mp->m_sb.sb_rbmblocks = scounter; | |
1371 | return (0); | |
1372 | case XFS_SBS_RBLOCKS: | |
1373 | lcounter = (long long)mp->m_sb.sb_rblocks; | |
1374 | lcounter += delta; | |
1375 | if (lcounter < 0) { | |
1376 | ASSERT(0); | |
1377 | return (XFS_ERROR(EINVAL)); | |
1378 | } | |
1379 | mp->m_sb.sb_rblocks = lcounter; | |
1380 | return (0); | |
1381 | case XFS_SBS_REXTENTS: | |
1382 | lcounter = (long long)mp->m_sb.sb_rextents; | |
1383 | lcounter += delta; | |
1384 | if (lcounter < 0) { | |
1385 | ASSERT(0); | |
1386 | return (XFS_ERROR(EINVAL)); | |
1387 | } | |
1388 | mp->m_sb.sb_rextents = lcounter; | |
1389 | return (0); | |
1390 | case XFS_SBS_REXTSLOG: | |
1391 | scounter = mp->m_sb.sb_rextslog; | |
1392 | scounter += delta; | |
1393 | if (scounter < 0) { | |
1394 | ASSERT(0); | |
1395 | return (XFS_ERROR(EINVAL)); | |
1396 | } | |
1397 | mp->m_sb.sb_rextslog = scounter; | |
1398 | return (0); | |
1399 | default: | |
1400 | ASSERT(0); | |
1401 | return (XFS_ERROR(EINVAL)); | |
1402 | } | |
1403 | } | |
1404 | ||
1405 | /* | |
1406 | * xfs_mod_incore_sb() is used to change a field in the in-core | |
1407 | * superblock structure by the specified delta. This modification | |
1408 | * is protected by the SB_LOCK. Just use the xfs_mod_incore_sb_unlocked() | |
1409 | * routine to do the work. | |
1410 | */ | |
1411 | int | |
1412 | xfs_mod_incore_sb(xfs_mount_t *mp, xfs_sb_field_t field, int delta, int rsvd) | |
1413 | { | |
1414 | unsigned long s; | |
1415 | int status; | |
1416 | ||
1417 | s = XFS_SB_LOCK(mp); | |
1418 | status = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd); | |
1419 | XFS_SB_UNLOCK(mp, s); | |
1420 | return (status); | |
1421 | } | |
1422 | ||
1423 | /* | |
1424 | * xfs_mod_incore_sb_batch() is used to change more than one field | |
1425 | * in the in-core superblock structure at a time. This modification | |
1426 | * is protected by a lock internal to this module. The fields and | |
1427 | * changes to those fields are specified in the array of xfs_mod_sb | |
1428 | * structures passed in. | |
1429 | * | |
1430 | * Either all of the specified deltas will be applied or none of | |
1431 | * them will. If any modified field dips below 0, then all modifications | |
1432 | * will be backed out and EINVAL will be returned. | |
1433 | */ | |
1434 | int | |
1435 | xfs_mod_incore_sb_batch(xfs_mount_t *mp, xfs_mod_sb_t *msb, uint nmsb, int rsvd) | |
1436 | { | |
1437 | unsigned long s; | |
1438 | int status=0; | |
1439 | xfs_mod_sb_t *msbp; | |
1440 | ||
1441 | /* | |
1442 | * Loop through the array of mod structures and apply each | |
1443 | * individually. If any fail, then back out all those | |
1444 | * which have already been applied. Do all of this within | |
1445 | * the scope of the SB_LOCK so that all of the changes will | |
1446 | * be atomic. | |
1447 | */ | |
1448 | s = XFS_SB_LOCK(mp); | |
1449 | msbp = &msb[0]; | |
1450 | for (msbp = &msbp[0]; msbp < (msb + nmsb); msbp++) { | |
1451 | /* | |
1452 | * Apply the delta at index n. If it fails, break | |
1453 | * from the loop so we'll fall into the undo loop | |
1454 | * below. | |
1455 | */ | |
1456 | status = xfs_mod_incore_sb_unlocked(mp, msbp->msb_field, | |
1457 | msbp->msb_delta, rsvd); | |
1458 | if (status != 0) { | |
1459 | break; | |
1460 | } | |
1461 | } | |
1462 | ||
1463 | /* | |
1464 | * If we didn't complete the loop above, then back out | |
1465 | * any changes made to the superblock. If you add code | |
1466 | * between the loop above and here, make sure that you | |
1467 | * preserve the value of status. Loop back until | |
1468 | * we step below the beginning of the array. Make sure | |
1469 | * we don't touch anything back there. | |
1470 | */ | |
1471 | if (status != 0) { | |
1472 | msbp--; | |
1473 | while (msbp >= msb) { | |
1474 | status = xfs_mod_incore_sb_unlocked(mp, | |
1475 | msbp->msb_field, -(msbp->msb_delta), rsvd); | |
1476 | ASSERT(status == 0); | |
1477 | msbp--; | |
1478 | } | |
1479 | } | |
1480 | XFS_SB_UNLOCK(mp, s); | |
1481 | return (status); | |
1482 | } | |
1483 | ||
1484 | /* | |
1485 | * xfs_getsb() is called to obtain the buffer for the superblock. | |
1486 | * The buffer is returned locked and read in from disk. | |
1487 | * The buffer should be released with a call to xfs_brelse(). | |
1488 | * | |
1489 | * If the flags parameter is BUF_TRYLOCK, then we'll only return | |
1490 | * the superblock buffer if it can be locked without sleeping. | |
1491 | * If it can't then we'll return NULL. | |
1492 | */ | |
1493 | xfs_buf_t * | |
1494 | xfs_getsb( | |
1495 | xfs_mount_t *mp, | |
1496 | int flags) | |
1497 | { | |
1498 | xfs_buf_t *bp; | |
1499 | ||
1500 | ASSERT(mp->m_sb_bp != NULL); | |
1501 | bp = mp->m_sb_bp; | |
1502 | if (flags & XFS_BUF_TRYLOCK) { | |
1503 | if (!XFS_BUF_CPSEMA(bp)) { | |
1504 | return NULL; | |
1505 | } | |
1506 | } else { | |
1507 | XFS_BUF_PSEMA(bp, PRIBIO); | |
1508 | } | |
1509 | XFS_BUF_HOLD(bp); | |
1510 | ASSERT(XFS_BUF_ISDONE(bp)); | |
1511 | return (bp); | |
1512 | } | |
1513 | ||
1514 | /* | |
1515 | * Used to free the superblock along various error paths. | |
1516 | */ | |
1517 | void | |
1518 | xfs_freesb( | |
1519 | xfs_mount_t *mp) | |
1520 | { | |
1521 | xfs_buf_t *bp; | |
1522 | ||
1523 | /* | |
1524 | * Use xfs_getsb() so that the buffer will be locked | |
1525 | * when we call xfs_buf_relse(). | |
1526 | */ | |
1527 | bp = xfs_getsb(mp, 0); | |
1528 | XFS_BUF_UNMANAGE(bp); | |
1529 | xfs_buf_relse(bp); | |
1530 | mp->m_sb_bp = NULL; | |
1531 | } | |
1532 | ||
1533 | /* | |
1534 | * See if the UUID is unique among mounted XFS filesystems. | |
1535 | * Mount fails if UUID is nil or a FS with the same UUID is already mounted. | |
1536 | */ | |
1537 | STATIC int | |
1538 | xfs_uuid_mount( | |
1539 | xfs_mount_t *mp) | |
1540 | { | |
1541 | if (uuid_is_nil(&mp->m_sb.sb_uuid)) { | |
1542 | cmn_err(CE_WARN, | |
1543 | "XFS: Filesystem %s has nil UUID - can't mount", | |
1544 | mp->m_fsname); | |
1545 | return -1; | |
1546 | } | |
1547 | if (!uuid_table_insert(&mp->m_sb.sb_uuid)) { | |
1548 | cmn_err(CE_WARN, | |
1549 | "XFS: Filesystem %s has duplicate UUID - can't mount", | |
1550 | mp->m_fsname); | |
1551 | return -1; | |
1552 | } | |
1553 | return 0; | |
1554 | } | |
1555 | ||
1556 | /* | |
1557 | * Remove filesystem from the UUID table. | |
1558 | */ | |
1559 | STATIC void | |
1560 | xfs_uuid_unmount( | |
1561 | xfs_mount_t *mp) | |
1562 | { | |
1563 | uuid_table_remove(&mp->m_sb.sb_uuid); | |
1564 | } | |
1565 | ||
1566 | /* | |
1567 | * Used to log changes to the superblock unit and width fields which could | |
1568 | * be altered by the mount options. Only the first superblock is updated. | |
1569 | */ | |
1570 | STATIC void | |
1571 | xfs_mount_log_sbunit( | |
1572 | xfs_mount_t *mp, | |
1573 | __int64_t fields) | |
1574 | { | |
1575 | xfs_trans_t *tp; | |
1576 | ||
1577 | ASSERT(fields & (XFS_SB_UNIT|XFS_SB_WIDTH|XFS_SB_UUID)); | |
1578 | ||
1579 | tp = xfs_trans_alloc(mp, XFS_TRANS_SB_UNIT); | |
1580 | if (xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0, | |
1581 | XFS_DEFAULT_LOG_COUNT)) { | |
1582 | xfs_trans_cancel(tp, 0); | |
1583 | return; | |
1584 | } | |
1585 | xfs_mod_sb(tp, fields); | |
1586 | xfs_trans_commit(tp, 0, NULL); | |
1587 | } |