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1da177e4 | 1 | /* |
d8cc890d | 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. All Rights Reserved. |
1da177e4 LT |
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 | */ | |
1da177e4 | 32 | #include "xfs.h" |
a844f451 | 33 | #include "xfs_fs.h" |
1da177e4 | 34 | #include "xfs_types.h" |
a844f451 | 35 | #include "xfs_bit.h" |
1da177e4 | 36 | #include "xfs_log.h" |
a844f451 | 37 | #include "xfs_inum.h" |
1da177e4 LT |
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" | |
1da177e4 | 45 | #include "xfs_bmap_btree.h" |
a844f451 | 46 | #include "xfs_alloc_btree.h" |
1da177e4 | 47 | #include "xfs_ialloc_btree.h" |
1da177e4 LT |
48 | #include "xfs_dir_sf.h" |
49 | #include "xfs_dir2_sf.h" | |
a844f451 | 50 | #include "xfs_attr_sf.h" |
1da177e4 LT |
51 | #include "xfs_dinode.h" |
52 | #include "xfs_inode.h" | |
a844f451 NS |
53 | #include "xfs_btree.h" |
54 | #include "xfs_ialloc.h" | |
1da177e4 LT |
55 | #include "xfs_alloc.h" |
56 | #include "xfs_rtalloc.h" | |
57 | #include "xfs_bmap.h" | |
58 | #include "xfs_error.h" | |
1da177e4 LT |
59 | #include "xfs_rw.h" |
60 | #include "xfs_quota.h" | |
61 | #include "xfs_fsops.h" | |
62 | ||
63 | STATIC void xfs_mount_log_sbunit(xfs_mount_t *, __int64_t); | |
64 | STATIC int xfs_uuid_mount(xfs_mount_t *); | |
65 | STATIC void xfs_uuid_unmount(xfs_mount_t *mp); | |
ba0f32d4 | 66 | STATIC void xfs_unmountfs_wait(xfs_mount_t *); |
1da177e4 LT |
67 | |
68 | static struct { | |
69 | short offset; | |
70 | short type; /* 0 = integer | |
71 | * 1 = binary / string (no translation) | |
72 | */ | |
73 | } xfs_sb_info[] = { | |
74 | { offsetof(xfs_sb_t, sb_magicnum), 0 }, | |
75 | { offsetof(xfs_sb_t, sb_blocksize), 0 }, | |
76 | { offsetof(xfs_sb_t, sb_dblocks), 0 }, | |
77 | { offsetof(xfs_sb_t, sb_rblocks), 0 }, | |
78 | { offsetof(xfs_sb_t, sb_rextents), 0 }, | |
79 | { offsetof(xfs_sb_t, sb_uuid), 1 }, | |
80 | { offsetof(xfs_sb_t, sb_logstart), 0 }, | |
81 | { offsetof(xfs_sb_t, sb_rootino), 0 }, | |
82 | { offsetof(xfs_sb_t, sb_rbmino), 0 }, | |
83 | { offsetof(xfs_sb_t, sb_rsumino), 0 }, | |
84 | { offsetof(xfs_sb_t, sb_rextsize), 0 }, | |
85 | { offsetof(xfs_sb_t, sb_agblocks), 0 }, | |
86 | { offsetof(xfs_sb_t, sb_agcount), 0 }, | |
87 | { offsetof(xfs_sb_t, sb_rbmblocks), 0 }, | |
88 | { offsetof(xfs_sb_t, sb_logblocks), 0 }, | |
89 | { offsetof(xfs_sb_t, sb_versionnum), 0 }, | |
90 | { offsetof(xfs_sb_t, sb_sectsize), 0 }, | |
91 | { offsetof(xfs_sb_t, sb_inodesize), 0 }, | |
92 | { offsetof(xfs_sb_t, sb_inopblock), 0 }, | |
93 | { offsetof(xfs_sb_t, sb_fname[0]), 1 }, | |
94 | { offsetof(xfs_sb_t, sb_blocklog), 0 }, | |
95 | { offsetof(xfs_sb_t, sb_sectlog), 0 }, | |
96 | { offsetof(xfs_sb_t, sb_inodelog), 0 }, | |
97 | { offsetof(xfs_sb_t, sb_inopblog), 0 }, | |
98 | { offsetof(xfs_sb_t, sb_agblklog), 0 }, | |
99 | { offsetof(xfs_sb_t, sb_rextslog), 0 }, | |
100 | { offsetof(xfs_sb_t, sb_inprogress), 0 }, | |
101 | { offsetof(xfs_sb_t, sb_imax_pct), 0 }, | |
102 | { offsetof(xfs_sb_t, sb_icount), 0 }, | |
103 | { offsetof(xfs_sb_t, sb_ifree), 0 }, | |
104 | { offsetof(xfs_sb_t, sb_fdblocks), 0 }, | |
105 | { offsetof(xfs_sb_t, sb_frextents), 0 }, | |
106 | { offsetof(xfs_sb_t, sb_uquotino), 0 }, | |
107 | { offsetof(xfs_sb_t, sb_gquotino), 0 }, | |
108 | { offsetof(xfs_sb_t, sb_qflags), 0 }, | |
109 | { offsetof(xfs_sb_t, sb_flags), 0 }, | |
110 | { offsetof(xfs_sb_t, sb_shared_vn), 0 }, | |
111 | { offsetof(xfs_sb_t, sb_inoalignmt), 0 }, | |
112 | { offsetof(xfs_sb_t, sb_unit), 0 }, | |
113 | { offsetof(xfs_sb_t, sb_width), 0 }, | |
114 | { offsetof(xfs_sb_t, sb_dirblklog), 0 }, | |
115 | { offsetof(xfs_sb_t, sb_logsectlog), 0 }, | |
116 | { offsetof(xfs_sb_t, sb_logsectsize),0 }, | |
117 | { offsetof(xfs_sb_t, sb_logsunit), 0 }, | |
118 | { offsetof(xfs_sb_t, sb_features2), 0 }, | |
119 | { sizeof(xfs_sb_t), 0 } | |
120 | }; | |
121 | ||
122 | /* | |
123 | * Return a pointer to an initialized xfs_mount structure. | |
124 | */ | |
125 | xfs_mount_t * | |
126 | xfs_mount_init(void) | |
127 | { | |
128 | xfs_mount_t *mp; | |
129 | ||
130 | mp = kmem_zalloc(sizeof(*mp), KM_SLEEP); | |
131 | ||
132 | AIL_LOCKINIT(&mp->m_ail_lock, "xfs_ail"); | |
133 | spinlock_init(&mp->m_sb_lock, "xfs_sb"); | |
134 | mutex_init(&mp->m_ilock, MUTEX_DEFAULT, "xfs_ilock"); | |
135 | initnsema(&mp->m_growlock, 1, "xfs_grow"); | |
136 | /* | |
137 | * Initialize the AIL. | |
138 | */ | |
139 | xfs_trans_ail_init(mp); | |
140 | ||
141 | atomic_set(&mp->m_active_trans, 0); | |
142 | ||
143 | return mp; | |
144 | } | |
145 | ||
146 | /* | |
147 | * Free up the resources associated with a mount structure. Assume that | |
148 | * the structure was initially zeroed, so we can tell which fields got | |
149 | * initialized. | |
150 | */ | |
151 | void | |
152 | xfs_mount_free( | |
153 | xfs_mount_t *mp, | |
154 | int remove_bhv) | |
155 | { | |
156 | if (mp->m_ihash) | |
157 | xfs_ihash_free(mp); | |
158 | if (mp->m_chash) | |
159 | xfs_chash_free(mp); | |
160 | ||
161 | if (mp->m_perag) { | |
162 | int agno; | |
163 | ||
164 | for (agno = 0; agno < mp->m_maxagi; agno++) | |
165 | if (mp->m_perag[agno].pagb_list) | |
166 | kmem_free(mp->m_perag[agno].pagb_list, | |
167 | sizeof(xfs_perag_busy_t) * | |
168 | XFS_PAGB_NUM_SLOTS); | |
169 | kmem_free(mp->m_perag, | |
170 | sizeof(xfs_perag_t) * mp->m_sb.sb_agcount); | |
171 | } | |
172 | ||
173 | AIL_LOCK_DESTROY(&mp->m_ail_lock); | |
174 | spinlock_destroy(&mp->m_sb_lock); | |
175 | mutex_destroy(&mp->m_ilock); | |
176 | freesema(&mp->m_growlock); | |
177 | if (mp->m_quotainfo) | |
178 | XFS_QM_DONE(mp); | |
179 | ||
180 | if (mp->m_fsname != NULL) | |
181 | kmem_free(mp->m_fsname, mp->m_fsname_len); | |
fc1f8c1c NS |
182 | if (mp->m_rtname != NULL) |
183 | kmem_free(mp->m_rtname, strlen(mp->m_rtname) + 1); | |
184 | if (mp->m_logname != NULL) | |
185 | kmem_free(mp->m_logname, strlen(mp->m_logname) + 1); | |
1da177e4 LT |
186 | |
187 | if (remove_bhv) { | |
188 | struct vfs *vfsp = XFS_MTOVFS(mp); | |
189 | ||
190 | bhv_remove_all_vfsops(vfsp, 0); | |
191 | VFS_REMOVEBHV(vfsp, &mp->m_bhv); | |
192 | } | |
193 | ||
194 | kmem_free(mp, sizeof(xfs_mount_t)); | |
195 | } | |
196 | ||
197 | ||
198 | /* | |
199 | * Check the validity of the SB found. | |
200 | */ | |
201 | STATIC int | |
202 | xfs_mount_validate_sb( | |
203 | xfs_mount_t *mp, | |
204 | xfs_sb_t *sbp) | |
205 | { | |
206 | /* | |
207 | * If the log device and data device have the | |
208 | * same device number, the log is internal. | |
209 | * Consequently, the sb_logstart should be non-zero. If | |
210 | * we have a zero sb_logstart in this case, we may be trying to mount | |
211 | * a volume filesystem in a non-volume manner. | |
212 | */ | |
213 | if (sbp->sb_magicnum != XFS_SB_MAGIC) { | |
214 | cmn_err(CE_WARN, "XFS: bad magic number"); | |
215 | return XFS_ERROR(EWRONGFS); | |
216 | } | |
217 | ||
218 | if (!XFS_SB_GOOD_VERSION(sbp)) { | |
219 | cmn_err(CE_WARN, "XFS: bad version"); | |
220 | return XFS_ERROR(EWRONGFS); | |
221 | } | |
222 | ||
223 | if (unlikely( | |
224 | sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { | |
225 | cmn_err(CE_WARN, | |
226 | "XFS: filesystem is marked as having an external log; " | |
227 | "specify logdev on the\nmount command line."); | |
228 | XFS_CORRUPTION_ERROR("xfs_mount_validate_sb(1)", | |
229 | XFS_ERRLEVEL_HIGH, mp, sbp); | |
230 | return XFS_ERROR(EFSCORRUPTED); | |
231 | } | |
232 | ||
233 | if (unlikely( | |
234 | sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { | |
235 | cmn_err(CE_WARN, | |
236 | "XFS: filesystem is marked as having an internal log; " | |
237 | "don't specify logdev on\nthe mount command line."); | |
238 | XFS_CORRUPTION_ERROR("xfs_mount_validate_sb(2)", | |
239 | XFS_ERRLEVEL_HIGH, mp, sbp); | |
240 | return XFS_ERROR(EFSCORRUPTED); | |
241 | } | |
242 | ||
243 | /* | |
244 | * More sanity checking. These were stolen directly from | |
245 | * xfs_repair. | |
246 | */ | |
247 | if (unlikely( | |
248 | sbp->sb_agcount <= 0 || | |
249 | sbp->sb_sectsize < XFS_MIN_SECTORSIZE || | |
250 | sbp->sb_sectsize > XFS_MAX_SECTORSIZE || | |
251 | sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG || | |
252 | sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG || | |
253 | sbp->sb_blocksize < XFS_MIN_BLOCKSIZE || | |
254 | sbp->sb_blocksize > XFS_MAX_BLOCKSIZE || | |
255 | sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG || | |
256 | sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG || | |
257 | sbp->sb_inodesize < XFS_DINODE_MIN_SIZE || | |
258 | sbp->sb_inodesize > XFS_DINODE_MAX_SIZE || | |
259 | (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) || | |
260 | (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) || | |
261 | sbp->sb_imax_pct > 100)) { | |
262 | cmn_err(CE_WARN, "XFS: SB sanity check 1 failed"); | |
263 | XFS_CORRUPTION_ERROR("xfs_mount_validate_sb(3)", | |
264 | XFS_ERRLEVEL_LOW, mp, sbp); | |
265 | return XFS_ERROR(EFSCORRUPTED); | |
266 | } | |
267 | ||
268 | /* | |
269 | * Sanity check AG count, size fields against data size field | |
270 | */ | |
271 | if (unlikely( | |
272 | sbp->sb_dblocks == 0 || | |
273 | sbp->sb_dblocks > | |
274 | (xfs_drfsbno_t)sbp->sb_agcount * sbp->sb_agblocks || | |
275 | sbp->sb_dblocks < (xfs_drfsbno_t)(sbp->sb_agcount - 1) * | |
276 | sbp->sb_agblocks + XFS_MIN_AG_BLOCKS)) { | |
277 | cmn_err(CE_WARN, "XFS: SB sanity check 2 failed"); | |
278 | XFS_ERROR_REPORT("xfs_mount_validate_sb(4)", | |
279 | XFS_ERRLEVEL_LOW, mp); | |
280 | return XFS_ERROR(EFSCORRUPTED); | |
281 | } | |
282 | ||
283 | ASSERT(PAGE_SHIFT >= sbp->sb_blocklog); | |
284 | ASSERT(sbp->sb_blocklog >= BBSHIFT); | |
285 | ||
286 | #if XFS_BIG_BLKNOS /* Limited by ULONG_MAX of page cache index */ | |
287 | if (unlikely( | |
288 | (sbp->sb_dblocks >> (PAGE_SHIFT - sbp->sb_blocklog)) > ULONG_MAX || | |
289 | (sbp->sb_rblocks >> (PAGE_SHIFT - sbp->sb_blocklog)) > ULONG_MAX)) { | |
290 | #else /* Limited by UINT_MAX of sectors */ | |
291 | if (unlikely( | |
292 | (sbp->sb_dblocks << (sbp->sb_blocklog - BBSHIFT)) > UINT_MAX || | |
293 | (sbp->sb_rblocks << (sbp->sb_blocklog - BBSHIFT)) > UINT_MAX)) { | |
294 | #endif | |
295 | cmn_err(CE_WARN, | |
296 | "XFS: File system is too large to be mounted on this system."); | |
297 | return XFS_ERROR(E2BIG); | |
298 | } | |
299 | ||
300 | if (unlikely(sbp->sb_inprogress)) { | |
301 | cmn_err(CE_WARN, "XFS: file system busy"); | |
302 | XFS_ERROR_REPORT("xfs_mount_validate_sb(5)", | |
303 | XFS_ERRLEVEL_LOW, mp); | |
304 | return XFS_ERROR(EFSCORRUPTED); | |
305 | } | |
306 | ||
de20614b NS |
307 | /* |
308 | * Version 1 directory format has never worked on Linux. | |
309 | */ | |
310 | if (unlikely(!XFS_SB_VERSION_HASDIRV2(sbp))) { | |
311 | cmn_err(CE_WARN, | |
312 | "XFS: Attempted to mount file system using version 1 directory format"); | |
313 | return XFS_ERROR(ENOSYS); | |
314 | } | |
315 | ||
1da177e4 LT |
316 | /* |
317 | * Until this is fixed only page-sized or smaller data blocks work. | |
318 | */ | |
319 | if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) { | |
320 | cmn_err(CE_WARN, | |
321 | "XFS: Attempted to mount file system with blocksize %d bytes", | |
322 | sbp->sb_blocksize); | |
323 | cmn_err(CE_WARN, | |
da1650a5 | 324 | "XFS: Only page-sized (%ld) or less blocksizes currently work.", |
1da177e4 LT |
325 | PAGE_SIZE); |
326 | return XFS_ERROR(ENOSYS); | |
327 | } | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
332 | xfs_agnumber_t | |
333 | xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount) | |
334 | { | |
335 | xfs_agnumber_t index, max_metadata; | |
336 | xfs_perag_t *pag; | |
337 | xfs_agino_t agino; | |
338 | xfs_ino_t ino; | |
339 | xfs_sb_t *sbp = &mp->m_sb; | |
340 | xfs_ino_t max_inum = XFS_MAXINUMBER_32; | |
341 | ||
342 | /* Check to see if the filesystem can overflow 32 bit inodes */ | |
343 | agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0); | |
344 | ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino); | |
345 | ||
346 | /* Clear the mount flag if no inode can overflow 32 bits | |
347 | * on this filesystem, or if specifically requested.. | |
348 | */ | |
349 | if ((mp->m_flags & XFS_MOUNT_32BITINOOPT) && ino > max_inum) { | |
350 | mp->m_flags |= XFS_MOUNT_32BITINODES; | |
351 | } else { | |
352 | mp->m_flags &= ~XFS_MOUNT_32BITINODES; | |
353 | } | |
354 | ||
355 | /* If we can overflow then setup the ag headers accordingly */ | |
356 | if (mp->m_flags & XFS_MOUNT_32BITINODES) { | |
357 | /* Calculate how much should be reserved for inodes to | |
358 | * meet the max inode percentage. | |
359 | */ | |
360 | if (mp->m_maxicount) { | |
361 | __uint64_t icount; | |
362 | ||
363 | icount = sbp->sb_dblocks * sbp->sb_imax_pct; | |
364 | do_div(icount, 100); | |
365 | icount += sbp->sb_agblocks - 1; | |
366 | do_div(icount, mp->m_ialloc_blks); | |
367 | max_metadata = icount; | |
368 | } else { | |
369 | max_metadata = agcount; | |
370 | } | |
371 | for (index = 0; index < agcount; index++) { | |
372 | ino = XFS_AGINO_TO_INO(mp, index, agino); | |
373 | if (ino > max_inum) { | |
374 | index++; | |
375 | break; | |
376 | } | |
377 | ||
378 | /* This ag is prefered for inodes */ | |
379 | pag = &mp->m_perag[index]; | |
380 | pag->pagi_inodeok = 1; | |
381 | if (index < max_metadata) | |
382 | pag->pagf_metadata = 1; | |
383 | } | |
384 | } else { | |
385 | /* Setup default behavior for smaller filesystems */ | |
386 | for (index = 0; index < agcount; index++) { | |
387 | pag = &mp->m_perag[index]; | |
388 | pag->pagi_inodeok = 1; | |
389 | } | |
390 | } | |
391 | return index; | |
392 | } | |
393 | ||
394 | /* | |
395 | * xfs_xlatesb | |
396 | * | |
397 | * data - on disk version of sb | |
398 | * sb - a superblock | |
399 | * dir - conversion direction: <0 - convert sb to buf | |
400 | * >0 - convert buf to sb | |
401 | * fields - which fields to copy (bitmask) | |
402 | */ | |
403 | void | |
404 | xfs_xlatesb( | |
405 | void *data, | |
406 | xfs_sb_t *sb, | |
407 | int dir, | |
408 | __int64_t fields) | |
409 | { | |
410 | xfs_caddr_t buf_ptr; | |
411 | xfs_caddr_t mem_ptr; | |
412 | xfs_sb_field_t f; | |
413 | int first; | |
414 | int size; | |
415 | ||
416 | ASSERT(dir); | |
417 | ASSERT(fields); | |
418 | ||
419 | if (!fields) | |
420 | return; | |
421 | ||
422 | buf_ptr = (xfs_caddr_t)data; | |
423 | mem_ptr = (xfs_caddr_t)sb; | |
424 | ||
425 | while (fields) { | |
426 | f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields); | |
427 | first = xfs_sb_info[f].offset; | |
428 | size = xfs_sb_info[f + 1].offset - first; | |
429 | ||
430 | ASSERT(xfs_sb_info[f].type == 0 || xfs_sb_info[f].type == 1); | |
431 | ||
432 | if (size == 1 || xfs_sb_info[f].type == 1) { | |
433 | if (dir > 0) { | |
434 | memcpy(mem_ptr + first, buf_ptr + first, size); | |
435 | } else { | |
436 | memcpy(buf_ptr + first, mem_ptr + first, size); | |
437 | } | |
438 | } else { | |
439 | switch (size) { | |
440 | case 2: | |
441 | INT_XLATE(*(__uint16_t*)(buf_ptr+first), | |
442 | *(__uint16_t*)(mem_ptr+first), | |
443 | dir, ARCH_CONVERT); | |
444 | break; | |
445 | case 4: | |
446 | INT_XLATE(*(__uint32_t*)(buf_ptr+first), | |
447 | *(__uint32_t*)(mem_ptr+first), | |
448 | dir, ARCH_CONVERT); | |
449 | break; | |
450 | case 8: | |
451 | INT_XLATE(*(__uint64_t*)(buf_ptr+first), | |
452 | *(__uint64_t*)(mem_ptr+first), dir, ARCH_CONVERT); | |
453 | break; | |
454 | default: | |
455 | ASSERT(0); | |
456 | } | |
457 | } | |
458 | ||
459 | fields &= ~(1LL << f); | |
460 | } | |
461 | } | |
462 | ||
463 | /* | |
464 | * xfs_readsb | |
465 | * | |
466 | * Does the initial read of the superblock. | |
467 | */ | |
468 | int | |
469 | xfs_readsb(xfs_mount_t *mp) | |
470 | { | |
471 | unsigned int sector_size; | |
472 | unsigned int extra_flags; | |
473 | xfs_buf_t *bp; | |
474 | xfs_sb_t *sbp; | |
475 | int error; | |
476 | ||
477 | ASSERT(mp->m_sb_bp == NULL); | |
478 | ASSERT(mp->m_ddev_targp != NULL); | |
479 | ||
480 | /* | |
481 | * Allocate a (locked) buffer to hold the superblock. | |
482 | * This will be kept around at all times to optimize | |
483 | * access to the superblock. | |
484 | */ | |
485 | sector_size = xfs_getsize_buftarg(mp->m_ddev_targp); | |
486 | extra_flags = XFS_BUF_LOCK | XFS_BUF_MANAGE | XFS_BUF_MAPPED; | |
487 | ||
488 | bp = xfs_buf_read_flags(mp->m_ddev_targp, XFS_SB_DADDR, | |
489 | BTOBB(sector_size), extra_flags); | |
490 | if (!bp || XFS_BUF_ISERROR(bp)) { | |
491 | cmn_err(CE_WARN, "XFS: SB read failed"); | |
492 | error = bp ? XFS_BUF_GETERROR(bp) : ENOMEM; | |
493 | goto fail; | |
494 | } | |
495 | ASSERT(XFS_BUF_ISBUSY(bp)); | |
496 | ASSERT(XFS_BUF_VALUSEMA(bp) <= 0); | |
497 | ||
498 | /* | |
499 | * Initialize the mount structure from the superblock. | |
500 | * But first do some basic consistency checking. | |
501 | */ | |
502 | sbp = XFS_BUF_TO_SBP(bp); | |
503 | xfs_xlatesb(XFS_BUF_PTR(bp), &(mp->m_sb), 1, XFS_SB_ALL_BITS); | |
504 | ||
505 | error = xfs_mount_validate_sb(mp, &(mp->m_sb)); | |
506 | if (error) { | |
507 | cmn_err(CE_WARN, "XFS: SB validate failed"); | |
508 | goto fail; | |
509 | } | |
510 | ||
511 | /* | |
512 | * We must be able to do sector-sized and sector-aligned IO. | |
513 | */ | |
514 | if (sector_size > mp->m_sb.sb_sectsize) { | |
515 | cmn_err(CE_WARN, | |
516 | "XFS: device supports only %u byte sectors (not %u)", | |
517 | sector_size, mp->m_sb.sb_sectsize); | |
518 | error = ENOSYS; | |
519 | goto fail; | |
520 | } | |
521 | ||
522 | /* | |
523 | * If device sector size is smaller than the superblock size, | |
524 | * re-read the superblock so the buffer is correctly sized. | |
525 | */ | |
526 | if (sector_size < mp->m_sb.sb_sectsize) { | |
527 | XFS_BUF_UNMANAGE(bp); | |
528 | xfs_buf_relse(bp); | |
529 | sector_size = mp->m_sb.sb_sectsize; | |
530 | bp = xfs_buf_read_flags(mp->m_ddev_targp, XFS_SB_DADDR, | |
531 | BTOBB(sector_size), extra_flags); | |
532 | if (!bp || XFS_BUF_ISERROR(bp)) { | |
533 | cmn_err(CE_WARN, "XFS: SB re-read failed"); | |
534 | error = bp ? XFS_BUF_GETERROR(bp) : ENOMEM; | |
535 | goto fail; | |
536 | } | |
537 | ASSERT(XFS_BUF_ISBUSY(bp)); | |
538 | ASSERT(XFS_BUF_VALUSEMA(bp) <= 0); | |
539 | } | |
540 | ||
541 | mp->m_sb_bp = bp; | |
542 | xfs_buf_relse(bp); | |
543 | ASSERT(XFS_BUF_VALUSEMA(bp) > 0); | |
544 | return 0; | |
545 | ||
546 | fail: | |
547 | if (bp) { | |
548 | XFS_BUF_UNMANAGE(bp); | |
549 | xfs_buf_relse(bp); | |
550 | } | |
551 | return error; | |
552 | } | |
553 | ||
554 | ||
555 | /* | |
556 | * xfs_mount_common | |
557 | * | |
558 | * Mount initialization code establishing various mount | |
559 | * fields from the superblock associated with the given | |
560 | * mount structure | |
561 | */ | |
ba0f32d4 | 562 | STATIC void |
1da177e4 LT |
563 | xfs_mount_common(xfs_mount_t *mp, xfs_sb_t *sbp) |
564 | { | |
565 | int i; | |
566 | ||
567 | mp->m_agfrotor = mp->m_agirotor = 0; | |
568 | spinlock_init(&mp->m_agirotor_lock, "m_agirotor_lock"); | |
569 | mp->m_maxagi = mp->m_sb.sb_agcount; | |
570 | mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG; | |
571 | mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT; | |
572 | mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; | |
573 | mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; | |
574 | mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; | |
575 | mp->m_litino = sbp->sb_inodesize - | |
576 | ((uint)sizeof(xfs_dinode_core_t) + (uint)sizeof(xfs_agino_t)); | |
577 | mp->m_blockmask = sbp->sb_blocksize - 1; | |
578 | mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; | |
579 | mp->m_blockwmask = mp->m_blockwsize - 1; | |
580 | INIT_LIST_HEAD(&mp->m_del_inodes); | |
581 | ||
582 | /* | |
583 | * Setup for attributes, in case they get created. | |
584 | * This value is for inodes getting attributes for the first time, | |
585 | * the per-inode value is for old attribute values. | |
586 | */ | |
587 | ASSERT(sbp->sb_inodesize >= 256 && sbp->sb_inodesize <= 2048); | |
588 | switch (sbp->sb_inodesize) { | |
589 | case 256: | |
d8cc890d NS |
590 | mp->m_attroffset = XFS_LITINO(mp) - |
591 | XFS_BMDR_SPACE_CALC(MINABTPTRS); | |
1da177e4 LT |
592 | break; |
593 | case 512: | |
594 | case 1024: | |
595 | case 2048: | |
d8cc890d | 596 | mp->m_attroffset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS); |
1da177e4 LT |
597 | break; |
598 | default: | |
599 | ASSERT(0); | |
600 | } | |
601 | ASSERT(mp->m_attroffset < XFS_LITINO(mp)); | |
602 | ||
603 | for (i = 0; i < 2; i++) { | |
604 | mp->m_alloc_mxr[i] = XFS_BTREE_BLOCK_MAXRECS(sbp->sb_blocksize, | |
605 | xfs_alloc, i == 0); | |
606 | mp->m_alloc_mnr[i] = XFS_BTREE_BLOCK_MINRECS(sbp->sb_blocksize, | |
607 | xfs_alloc, i == 0); | |
608 | } | |
609 | for (i = 0; i < 2; i++) { | |
610 | mp->m_bmap_dmxr[i] = XFS_BTREE_BLOCK_MAXRECS(sbp->sb_blocksize, | |
611 | xfs_bmbt, i == 0); | |
612 | mp->m_bmap_dmnr[i] = XFS_BTREE_BLOCK_MINRECS(sbp->sb_blocksize, | |
613 | xfs_bmbt, i == 0); | |
614 | } | |
615 | for (i = 0; i < 2; i++) { | |
616 | mp->m_inobt_mxr[i] = XFS_BTREE_BLOCK_MAXRECS(sbp->sb_blocksize, | |
617 | xfs_inobt, i == 0); | |
618 | mp->m_inobt_mnr[i] = XFS_BTREE_BLOCK_MINRECS(sbp->sb_blocksize, | |
619 | xfs_inobt, i == 0); | |
620 | } | |
621 | ||
622 | mp->m_bsize = XFS_FSB_TO_BB(mp, 1); | |
623 | mp->m_ialloc_inos = (int)MAX((__uint16_t)XFS_INODES_PER_CHUNK, | |
624 | sbp->sb_inopblock); | |
625 | mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog; | |
626 | } | |
627 | /* | |
628 | * xfs_mountfs | |
629 | * | |
630 | * This function does the following on an initial mount of a file system: | |
631 | * - reads the superblock from disk and init the mount struct | |
632 | * - if we're a 32-bit kernel, do a size check on the superblock | |
633 | * so we don't mount terabyte filesystems | |
634 | * - init mount struct realtime fields | |
635 | * - allocate inode hash table for fs | |
636 | * - init directory manager | |
637 | * - perform recovery and init the log manager | |
638 | */ | |
639 | int | |
640 | xfs_mountfs( | |
641 | vfs_t *vfsp, | |
642 | xfs_mount_t *mp, | |
643 | int mfsi_flags) | |
644 | { | |
645 | xfs_buf_t *bp; | |
646 | xfs_sb_t *sbp = &(mp->m_sb); | |
647 | xfs_inode_t *rip; | |
648 | vnode_t *rvp = NULL; | |
649 | int readio_log, writeio_log; | |
650 | xfs_daddr_t d; | |
651 | __uint64_t ret64; | |
652 | __int64_t update_flags; | |
653 | uint quotamount, quotaflags; | |
654 | int agno; | |
655 | int uuid_mounted = 0; | |
656 | int error = 0; | |
657 | ||
658 | if (mp->m_sb_bp == NULL) { | |
659 | if ((error = xfs_readsb(mp))) { | |
660 | return (error); | |
661 | } | |
662 | } | |
663 | xfs_mount_common(mp, sbp); | |
664 | ||
665 | /* | |
666 | * Check if sb_agblocks is aligned at stripe boundary | |
667 | * If sb_agblocks is NOT aligned turn off m_dalign since | |
668 | * allocator alignment is within an ag, therefore ag has | |
669 | * to be aligned at stripe boundary. | |
670 | */ | |
671 | update_flags = 0LL; | |
672 | if (mp->m_dalign && !(mfsi_flags & XFS_MFSI_SECOND)) { | |
673 | /* | |
674 | * If stripe unit and stripe width are not multiples | |
675 | * of the fs blocksize turn off alignment. | |
676 | */ | |
677 | if ((BBTOB(mp->m_dalign) & mp->m_blockmask) || | |
678 | (BBTOB(mp->m_swidth) & mp->m_blockmask)) { | |
679 | if (mp->m_flags & XFS_MOUNT_RETERR) { | |
680 | cmn_err(CE_WARN, | |
681 | "XFS: alignment check 1 failed"); | |
682 | error = XFS_ERROR(EINVAL); | |
683 | goto error1; | |
684 | } | |
685 | mp->m_dalign = mp->m_swidth = 0; | |
686 | } else { | |
687 | /* | |
688 | * Convert the stripe unit and width to FSBs. | |
689 | */ | |
690 | mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign); | |
691 | if (mp->m_dalign && (sbp->sb_agblocks % mp->m_dalign)) { | |
692 | if (mp->m_flags & XFS_MOUNT_RETERR) { | |
693 | error = XFS_ERROR(EINVAL); | |
694 | goto error1; | |
695 | } | |
696 | xfs_fs_cmn_err(CE_WARN, mp, | |
697 | "stripe alignment turned off: sunit(%d)/swidth(%d) incompatible with agsize(%d)", | |
698 | mp->m_dalign, mp->m_swidth, | |
699 | sbp->sb_agblocks); | |
700 | ||
701 | mp->m_dalign = 0; | |
702 | mp->m_swidth = 0; | |
703 | } else if (mp->m_dalign) { | |
704 | mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth); | |
705 | } else { | |
706 | if (mp->m_flags & XFS_MOUNT_RETERR) { | |
707 | xfs_fs_cmn_err(CE_WARN, mp, | |
708 | "stripe alignment turned off: sunit(%d) less than bsize(%d)", | |
709 | mp->m_dalign, | |
710 | mp->m_blockmask +1); | |
711 | error = XFS_ERROR(EINVAL); | |
712 | goto error1; | |
713 | } | |
714 | mp->m_swidth = 0; | |
715 | } | |
716 | } | |
717 | ||
718 | /* | |
719 | * Update superblock with new values | |
720 | * and log changes | |
721 | */ | |
722 | if (XFS_SB_VERSION_HASDALIGN(sbp)) { | |
723 | if (sbp->sb_unit != mp->m_dalign) { | |
724 | sbp->sb_unit = mp->m_dalign; | |
725 | update_flags |= XFS_SB_UNIT; | |
726 | } | |
727 | if (sbp->sb_width != mp->m_swidth) { | |
728 | sbp->sb_width = mp->m_swidth; | |
729 | update_flags |= XFS_SB_WIDTH; | |
730 | } | |
731 | } | |
732 | } else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN && | |
733 | XFS_SB_VERSION_HASDALIGN(&mp->m_sb)) { | |
734 | mp->m_dalign = sbp->sb_unit; | |
735 | mp->m_swidth = sbp->sb_width; | |
736 | } | |
737 | ||
738 | xfs_alloc_compute_maxlevels(mp); | |
739 | xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK); | |
740 | xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK); | |
741 | xfs_ialloc_compute_maxlevels(mp); | |
742 | ||
743 | if (sbp->sb_imax_pct) { | |
744 | __uint64_t icount; | |
745 | ||
746 | /* Make sure the maximum inode count is a multiple of the | |
747 | * units we allocate inodes in. | |
748 | */ | |
749 | ||
750 | icount = sbp->sb_dblocks * sbp->sb_imax_pct; | |
751 | do_div(icount, 100); | |
752 | do_div(icount, mp->m_ialloc_blks); | |
753 | mp->m_maxicount = (icount * mp->m_ialloc_blks) << | |
754 | sbp->sb_inopblog; | |
755 | } else | |
756 | mp->m_maxicount = 0; | |
757 | ||
758 | mp->m_maxioffset = xfs_max_file_offset(sbp->sb_blocklog); | |
759 | ||
760 | /* | |
761 | * XFS uses the uuid from the superblock as the unique | |
762 | * identifier for fsid. We can not use the uuid from the volume | |
763 | * since a single partition filesystem is identical to a single | |
764 | * partition volume/filesystem. | |
765 | */ | |
766 | if ((mfsi_flags & XFS_MFSI_SECOND) == 0 && | |
767 | (mp->m_flags & XFS_MOUNT_NOUUID) == 0) { | |
768 | if (xfs_uuid_mount(mp)) { | |
769 | error = XFS_ERROR(EINVAL); | |
770 | goto error1; | |
771 | } | |
772 | uuid_mounted=1; | |
773 | ret64 = uuid_hash64(&sbp->sb_uuid); | |
774 | memcpy(&vfsp->vfs_fsid, &ret64, sizeof(ret64)); | |
775 | } | |
776 | ||
777 | /* | |
778 | * Set the default minimum read and write sizes unless | |
779 | * already specified in a mount option. | |
780 | * We use smaller I/O sizes when the file system | |
781 | * is being used for NFS service (wsync mount option). | |
782 | */ | |
783 | if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) { | |
784 | if (mp->m_flags & XFS_MOUNT_WSYNC) { | |
785 | readio_log = XFS_WSYNC_READIO_LOG; | |
786 | writeio_log = XFS_WSYNC_WRITEIO_LOG; | |
787 | } else { | |
788 | readio_log = XFS_READIO_LOG_LARGE; | |
789 | writeio_log = XFS_WRITEIO_LOG_LARGE; | |
790 | } | |
791 | } else { | |
792 | readio_log = mp->m_readio_log; | |
793 | writeio_log = mp->m_writeio_log; | |
794 | } | |
795 | ||
796 | /* | |
797 | * Set the number of readahead buffers to use based on | |
798 | * physical memory size. | |
799 | */ | |
800 | if (xfs_physmem <= 4096) /* <= 16MB */ | |
801 | mp->m_nreadaheads = XFS_RW_NREADAHEAD_16MB; | |
802 | else if (xfs_physmem <= 8192) /* <= 32MB */ | |
803 | mp->m_nreadaheads = XFS_RW_NREADAHEAD_32MB; | |
804 | else | |
805 | mp->m_nreadaheads = XFS_RW_NREADAHEAD_K32; | |
806 | if (sbp->sb_blocklog > readio_log) { | |
807 | mp->m_readio_log = sbp->sb_blocklog; | |
808 | } else { | |
809 | mp->m_readio_log = readio_log; | |
810 | } | |
811 | mp->m_readio_blocks = 1 << (mp->m_readio_log - sbp->sb_blocklog); | |
812 | if (sbp->sb_blocklog > writeio_log) { | |
813 | mp->m_writeio_log = sbp->sb_blocklog; | |
814 | } else { | |
815 | mp->m_writeio_log = writeio_log; | |
816 | } | |
817 | mp->m_writeio_blocks = 1 << (mp->m_writeio_log - sbp->sb_blocklog); | |
818 | ||
819 | /* | |
820 | * Set the inode cluster size based on the physical memory | |
821 | * size. This may still be overridden by the file system | |
822 | * block size if it is larger than the chosen cluster size. | |
823 | */ | |
824 | if (xfs_physmem <= btoc(32 * 1024 * 1024)) { /* <= 32 MB */ | |
825 | mp->m_inode_cluster_size = XFS_INODE_SMALL_CLUSTER_SIZE; | |
826 | } else { | |
827 | mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE; | |
828 | } | |
829 | /* | |
830 | * Set whether we're using inode alignment. | |
831 | */ | |
832 | if (XFS_SB_VERSION_HASALIGN(&mp->m_sb) && | |
833 | mp->m_sb.sb_inoalignmt >= | |
834 | XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)) | |
835 | mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1; | |
836 | else | |
837 | mp->m_inoalign_mask = 0; | |
838 | /* | |
839 | * If we are using stripe alignment, check whether | |
840 | * the stripe unit is a multiple of the inode alignment | |
841 | */ | |
842 | if (mp->m_dalign && mp->m_inoalign_mask && | |
843 | !(mp->m_dalign & mp->m_inoalign_mask)) | |
844 | mp->m_sinoalign = mp->m_dalign; | |
845 | else | |
846 | mp->m_sinoalign = 0; | |
847 | /* | |
848 | * Check that the data (and log if separate) are an ok size. | |
849 | */ | |
850 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks); | |
851 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) { | |
852 | cmn_err(CE_WARN, "XFS: size check 1 failed"); | |
853 | error = XFS_ERROR(E2BIG); | |
854 | goto error1; | |
855 | } | |
856 | error = xfs_read_buf(mp, mp->m_ddev_targp, | |
857 | d - XFS_FSS_TO_BB(mp, 1), | |
858 | XFS_FSS_TO_BB(mp, 1), 0, &bp); | |
859 | if (!error) { | |
860 | xfs_buf_relse(bp); | |
861 | } else { | |
862 | cmn_err(CE_WARN, "XFS: size check 2 failed"); | |
863 | if (error == ENOSPC) { | |
864 | error = XFS_ERROR(E2BIG); | |
865 | } | |
866 | goto error1; | |
867 | } | |
868 | ||
869 | if (((mfsi_flags & XFS_MFSI_CLIENT) == 0) && | |
870 | mp->m_logdev_targp != mp->m_ddev_targp) { | |
871 | d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks); | |
872 | if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) { | |
873 | cmn_err(CE_WARN, "XFS: size check 3 failed"); | |
874 | error = XFS_ERROR(E2BIG); | |
875 | goto error1; | |
876 | } | |
877 | error = xfs_read_buf(mp, mp->m_logdev_targp, | |
878 | d - XFS_FSB_TO_BB(mp, 1), | |
879 | XFS_FSB_TO_BB(mp, 1), 0, &bp); | |
880 | if (!error) { | |
881 | xfs_buf_relse(bp); | |
882 | } else { | |
883 | cmn_err(CE_WARN, "XFS: size check 3 failed"); | |
884 | if (error == ENOSPC) { | |
885 | error = XFS_ERROR(E2BIG); | |
886 | } | |
887 | goto error1; | |
888 | } | |
889 | } | |
890 | ||
891 | /* | |
892 | * Initialize realtime fields in the mount structure | |
893 | */ | |
894 | if ((error = xfs_rtmount_init(mp))) { | |
895 | cmn_err(CE_WARN, "XFS: RT mount failed"); | |
896 | goto error1; | |
897 | } | |
898 | ||
899 | /* | |
900 | * For client case we are done now | |
901 | */ | |
902 | if (mfsi_flags & XFS_MFSI_CLIENT) { | |
903 | return(0); | |
904 | } | |
905 | ||
906 | /* | |
907 | * Copies the low order bits of the timestamp and the randomly | |
908 | * set "sequence" number out of a UUID. | |
909 | */ | |
910 | uuid_getnodeuniq(&sbp->sb_uuid, mp->m_fixedfsid); | |
911 | ||
912 | /* | |
913 | * The vfs structure needs to have a file system independent | |
914 | * way of checking for the invariant file system ID. Since it | |
915 | * can't look at mount structures it has a pointer to the data | |
916 | * in the mount structure. | |
917 | * | |
918 | * File systems that don't support user level file handles (i.e. | |
919 | * all of them except for XFS) will leave vfs_altfsid as NULL. | |
920 | */ | |
921 | vfsp->vfs_altfsid = (xfs_fsid_t *)mp->m_fixedfsid; | |
922 | mp->m_dmevmask = 0; /* not persistent; set after each mount */ | |
923 | ||
924 | /* | |
925 | * Select the right directory manager. | |
926 | */ | |
927 | mp->m_dirops = | |
928 | XFS_SB_VERSION_HASDIRV2(&mp->m_sb) ? | |
929 | xfsv2_dirops : | |
930 | xfsv1_dirops; | |
931 | ||
932 | /* | |
933 | * Initialize directory manager's entries. | |
934 | */ | |
935 | XFS_DIR_MOUNT(mp); | |
936 | ||
937 | /* | |
938 | * Initialize the attribute manager's entries. | |
939 | */ | |
940 | mp->m_attr_magicpct = (mp->m_sb.sb_blocksize * 37) / 100; | |
941 | ||
942 | /* | |
943 | * Initialize the precomputed transaction reservations values. | |
944 | */ | |
945 | xfs_trans_init(mp); | |
946 | ||
947 | /* | |
948 | * Allocate and initialize the inode hash table for this | |
949 | * file system. | |
950 | */ | |
951 | xfs_ihash_init(mp); | |
952 | xfs_chash_init(mp); | |
953 | ||
954 | /* | |
955 | * Allocate and initialize the per-ag data. | |
956 | */ | |
957 | init_rwsem(&mp->m_peraglock); | |
958 | mp->m_perag = | |
959 | kmem_zalloc(sbp->sb_agcount * sizeof(xfs_perag_t), KM_SLEEP); | |
960 | ||
961 | mp->m_maxagi = xfs_initialize_perag(mp, sbp->sb_agcount); | |
962 | ||
963 | /* | |
964 | * log's mount-time initialization. Perform 1st part recovery if needed | |
965 | */ | |
966 | if (likely(sbp->sb_logblocks > 0)) { /* check for volume case */ | |
967 | error = xfs_log_mount(mp, mp->m_logdev_targp, | |
968 | XFS_FSB_TO_DADDR(mp, sbp->sb_logstart), | |
969 | XFS_FSB_TO_BB(mp, sbp->sb_logblocks)); | |
970 | if (error) { | |
971 | cmn_err(CE_WARN, "XFS: log mount failed"); | |
972 | goto error2; | |
973 | } | |
974 | } else { /* No log has been defined */ | |
975 | cmn_err(CE_WARN, "XFS: no log defined"); | |
976 | XFS_ERROR_REPORT("xfs_mountfs_int(1)", XFS_ERRLEVEL_LOW, mp); | |
977 | error = XFS_ERROR(EFSCORRUPTED); | |
978 | goto error2; | |
979 | } | |
980 | ||
981 | /* | |
982 | * Get and sanity-check the root inode. | |
983 | * Save the pointer to it in the mount structure. | |
984 | */ | |
985 | error = xfs_iget(mp, NULL, sbp->sb_rootino, 0, XFS_ILOCK_EXCL, &rip, 0); | |
986 | if (error) { | |
987 | cmn_err(CE_WARN, "XFS: failed to read root inode"); | |
988 | goto error3; | |
989 | } | |
990 | ||
991 | ASSERT(rip != NULL); | |
992 | rvp = XFS_ITOV(rip); | |
993 | ||
994 | if (unlikely((rip->i_d.di_mode & S_IFMT) != S_IFDIR)) { | |
995 | cmn_err(CE_WARN, "XFS: corrupted root inode"); | |
996 | prdev("Root inode %llu is not a directory", | |
997 | mp->m_ddev_targp, (unsigned long long)rip->i_ino); | |
998 | xfs_iunlock(rip, XFS_ILOCK_EXCL); | |
999 | XFS_ERROR_REPORT("xfs_mountfs_int(2)", XFS_ERRLEVEL_LOW, | |
1000 | mp); | |
1001 | error = XFS_ERROR(EFSCORRUPTED); | |
1002 | goto error4; | |
1003 | } | |
1004 | mp->m_rootip = rip; /* save it */ | |
1005 | ||
1006 | xfs_iunlock(rip, XFS_ILOCK_EXCL); | |
1007 | ||
1008 | /* | |
1009 | * Initialize realtime inode pointers in the mount structure | |
1010 | */ | |
1011 | if ((error = xfs_rtmount_inodes(mp))) { | |
1012 | /* | |
1013 | * Free up the root inode. | |
1014 | */ | |
1015 | cmn_err(CE_WARN, "XFS: failed to read RT inodes"); | |
1016 | goto error4; | |
1017 | } | |
1018 | ||
1019 | /* | |
1020 | * If fs is not mounted readonly, then update the superblock | |
1021 | * unit and width changes. | |
1022 | */ | |
1023 | if (update_flags && !(vfsp->vfs_flag & VFS_RDONLY)) | |
1024 | xfs_mount_log_sbunit(mp, update_flags); | |
1025 | ||
1026 | /* | |
1027 | * Initialise the XFS quota management subsystem for this mount | |
1028 | */ | |
1029 | if ((error = XFS_QM_INIT(mp, "amount, "aflags))) | |
1030 | goto error4; | |
1031 | ||
1032 | /* | |
1033 | * Finish recovering the file system. This part needed to be | |
1034 | * delayed until after the root and real-time bitmap inodes | |
1035 | * were consistently read in. | |
1036 | */ | |
1037 | error = xfs_log_mount_finish(mp, mfsi_flags); | |
1038 | if (error) { | |
1039 | cmn_err(CE_WARN, "XFS: log mount finish failed"); | |
1040 | goto error4; | |
1041 | } | |
1042 | ||
1043 | /* | |
1044 | * Complete the quota initialisation, post-log-replay component. | |
1045 | */ | |
1046 | if ((error = XFS_QM_MOUNT(mp, quotamount, quotaflags, mfsi_flags))) | |
1047 | goto error4; | |
1048 | ||
1049 | return 0; | |
1050 | ||
1051 | error4: | |
1052 | /* | |
1053 | * Free up the root inode. | |
1054 | */ | |
1055 | VN_RELE(rvp); | |
1056 | error3: | |
1057 | xfs_log_unmount_dealloc(mp); | |
1058 | error2: | |
1059 | xfs_ihash_free(mp); | |
1060 | xfs_chash_free(mp); | |
1061 | for (agno = 0; agno < sbp->sb_agcount; agno++) | |
1062 | if (mp->m_perag[agno].pagb_list) | |
1063 | kmem_free(mp->m_perag[agno].pagb_list, | |
1064 | sizeof(xfs_perag_busy_t) * XFS_PAGB_NUM_SLOTS); | |
1065 | kmem_free(mp->m_perag, sbp->sb_agcount * sizeof(xfs_perag_t)); | |
1066 | mp->m_perag = NULL; | |
1067 | /* FALLTHROUGH */ | |
1068 | error1: | |
1069 | if (uuid_mounted) | |
1070 | xfs_uuid_unmount(mp); | |
1071 | xfs_freesb(mp); | |
1072 | return error; | |
1073 | } | |
1074 | ||
1075 | /* | |
1076 | * xfs_unmountfs | |
1077 | * | |
1078 | * This flushes out the inodes,dquots and the superblock, unmounts the | |
1079 | * log and makes sure that incore structures are freed. | |
1080 | */ | |
1081 | int | |
1082 | xfs_unmountfs(xfs_mount_t *mp, struct cred *cr) | |
1083 | { | |
1084 | struct vfs *vfsp = XFS_MTOVFS(mp); | |
1085 | #if defined(DEBUG) || defined(INDUCE_IO_ERROR) | |
1086 | int64_t fsid; | |
1087 | #endif | |
1088 | ||
efa80278 | 1089 | xfs_iflush_all(mp); |
1da177e4 LT |
1090 | |
1091 | XFS_QM_DQPURGEALL(mp, | |
1092 | XFS_QMOPT_UQUOTA | XFS_QMOPT_GQUOTA | XFS_QMOPT_UMOUNTING); | |
1093 | ||
1094 | /* | |
1095 | * Flush out the log synchronously so that we know for sure | |
1096 | * that nothing is pinned. This is important because bflush() | |
1097 | * will skip pinned buffers. | |
1098 | */ | |
1099 | xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC); | |
1100 | ||
1101 | xfs_binval(mp->m_ddev_targp); | |
1102 | if (mp->m_rtdev_targp) { | |
1103 | xfs_binval(mp->m_rtdev_targp); | |
1104 | } | |
1105 | ||
1106 | xfs_unmountfs_writesb(mp); | |
1107 | ||
1108 | xfs_unmountfs_wait(mp); /* wait for async bufs */ | |
1109 | ||
1110 | xfs_log_unmount(mp); /* Done! No more fs ops. */ | |
1111 | ||
1112 | xfs_freesb(mp); | |
1113 | ||
1114 | /* | |
1115 | * All inodes from this mount point should be freed. | |
1116 | */ | |
1117 | ASSERT(mp->m_inodes == NULL); | |
1118 | ||
1da177e4 LT |
1119 | xfs_unmountfs_close(mp, cr); |
1120 | if ((mp->m_flags & XFS_MOUNT_NOUUID) == 0) | |
1121 | xfs_uuid_unmount(mp); | |
1122 | ||
1123 | #if defined(DEBUG) || defined(INDUCE_IO_ERROR) | |
1124 | /* | |
1125 | * clear all error tags on this filesystem | |
1126 | */ | |
1127 | memcpy(&fsid, &vfsp->vfs_fsid, sizeof(int64_t)); | |
1128 | xfs_errortag_clearall_umount(fsid, mp->m_fsname, 0); | |
1129 | #endif | |
1130 | XFS_IODONE(vfsp); | |
1131 | xfs_mount_free(mp, 1); | |
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | void | |
1136 | xfs_unmountfs_close(xfs_mount_t *mp, struct cred *cr) | |
1137 | { | |
1138 | if (mp->m_logdev_targp != mp->m_ddev_targp) | |
1139 | xfs_free_buftarg(mp->m_logdev_targp, 1); | |
1140 | if (mp->m_rtdev_targp) | |
1141 | xfs_free_buftarg(mp->m_rtdev_targp, 1); | |
1142 | xfs_free_buftarg(mp->m_ddev_targp, 0); | |
1143 | } | |
1144 | ||
ba0f32d4 | 1145 | STATIC void |
1da177e4 LT |
1146 | xfs_unmountfs_wait(xfs_mount_t *mp) |
1147 | { | |
1148 | if (mp->m_logdev_targp != mp->m_ddev_targp) | |
1149 | xfs_wait_buftarg(mp->m_logdev_targp); | |
1150 | if (mp->m_rtdev_targp) | |
1151 | xfs_wait_buftarg(mp->m_rtdev_targp); | |
1152 | xfs_wait_buftarg(mp->m_ddev_targp); | |
1153 | } | |
1154 | ||
1155 | int | |
1156 | xfs_unmountfs_writesb(xfs_mount_t *mp) | |
1157 | { | |
1158 | xfs_buf_t *sbp; | |
1159 | xfs_sb_t *sb; | |
1160 | int error = 0; | |
1161 | ||
1162 | /* | |
1163 | * skip superblock write if fs is read-only, or | |
1164 | * if we are doing a forced umount. | |
1165 | */ | |
1166 | sbp = xfs_getsb(mp, 0); | |
1167 | if (!(XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY || | |
1168 | XFS_FORCED_SHUTDOWN(mp))) { | |
1169 | /* | |
1170 | * mark shared-readonly if desired | |
1171 | */ | |
1172 | sb = XFS_BUF_TO_SBP(sbp); | |
1173 | if (mp->m_mk_sharedro) { | |
1174 | if (!(sb->sb_flags & XFS_SBF_READONLY)) | |
1175 | sb->sb_flags |= XFS_SBF_READONLY; | |
1176 | if (!XFS_SB_VERSION_HASSHARED(sb)) | |
1177 | XFS_SB_VERSION_ADDSHARED(sb); | |
1178 | xfs_fs_cmn_err(CE_NOTE, mp, | |
1179 | "Unmounting, marking shared read-only"); | |
1180 | } | |
1181 | XFS_BUF_UNDONE(sbp); | |
1182 | XFS_BUF_UNREAD(sbp); | |
1183 | XFS_BUF_UNDELAYWRITE(sbp); | |
1184 | XFS_BUF_WRITE(sbp); | |
1185 | XFS_BUF_UNASYNC(sbp); | |
1186 | ASSERT(XFS_BUF_TARGET(sbp) == mp->m_ddev_targp); | |
1187 | xfsbdstrat(mp, sbp); | |
1188 | /* Nevermind errors we might get here. */ | |
1189 | error = xfs_iowait(sbp); | |
1190 | if (error) | |
1191 | xfs_ioerror_alert("xfs_unmountfs_writesb", | |
1192 | mp, sbp, XFS_BUF_ADDR(sbp)); | |
1193 | if (error && mp->m_mk_sharedro) | |
1194 | xfs_fs_cmn_err(CE_ALERT, mp, "Superblock write error detected while unmounting. Filesystem may not be marked shared readonly"); | |
1195 | } | |
1196 | xfs_buf_relse(sbp); | |
1197 | return (error); | |
1198 | } | |
1199 | ||
1200 | /* | |
1201 | * xfs_mod_sb() can be used to copy arbitrary changes to the | |
1202 | * in-core superblock into the superblock buffer to be logged. | |
1203 | * It does not provide the higher level of locking that is | |
1204 | * needed to protect the in-core superblock from concurrent | |
1205 | * access. | |
1206 | */ | |
1207 | void | |
1208 | xfs_mod_sb(xfs_trans_t *tp, __int64_t fields) | |
1209 | { | |
1210 | xfs_buf_t *bp; | |
1211 | int first; | |
1212 | int last; | |
1213 | xfs_mount_t *mp; | |
1214 | xfs_sb_t *sbp; | |
1215 | xfs_sb_field_t f; | |
1216 | ||
1217 | ASSERT(fields); | |
1218 | if (!fields) | |
1219 | return; | |
1220 | mp = tp->t_mountp; | |
1221 | bp = xfs_trans_getsb(tp, mp, 0); | |
1222 | sbp = XFS_BUF_TO_SBP(bp); | |
1223 | first = sizeof(xfs_sb_t); | |
1224 | last = 0; | |
1225 | ||
1226 | /* translate/copy */ | |
1227 | ||
1228 | xfs_xlatesb(XFS_BUF_PTR(bp), &(mp->m_sb), -1, fields); | |
1229 | ||
1230 | /* find modified range */ | |
1231 | ||
1232 | f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields); | |
1233 | ASSERT((1LL << f) & XFS_SB_MOD_BITS); | |
1234 | first = xfs_sb_info[f].offset; | |
1235 | ||
1236 | f = (xfs_sb_field_t)xfs_highbit64((__uint64_t)fields); | |
1237 | ASSERT((1LL << f) & XFS_SB_MOD_BITS); | |
1238 | last = xfs_sb_info[f + 1].offset - 1; | |
1239 | ||
1240 | xfs_trans_log_buf(tp, bp, first, last); | |
1241 | } | |
1242 | ||
1243 | /* | |
1244 | * xfs_mod_incore_sb_unlocked() is a utility routine common used to apply | |
1245 | * a delta to a specified field in the in-core superblock. Simply | |
1246 | * switch on the field indicated and apply the delta to that field. | |
1247 | * Fields are not allowed to dip below zero, so if the delta would | |
1248 | * do this do not apply it and return EINVAL. | |
1249 | * | |
1250 | * The SB_LOCK must be held when this routine is called. | |
1251 | */ | |
1252 | STATIC int | |
1253 | xfs_mod_incore_sb_unlocked(xfs_mount_t *mp, xfs_sb_field_t field, | |
1254 | int delta, int rsvd) | |
1255 | { | |
1256 | int scounter; /* short counter for 32 bit fields */ | |
1257 | long long lcounter; /* long counter for 64 bit fields */ | |
1258 | long long res_used, rem; | |
1259 | ||
1260 | /* | |
1261 | * With the in-core superblock spin lock held, switch | |
1262 | * on the indicated field. Apply the delta to the | |
1263 | * proper field. If the fields value would dip below | |
1264 | * 0, then do not apply the delta and return EINVAL. | |
1265 | */ | |
1266 | switch (field) { | |
1267 | case XFS_SBS_ICOUNT: | |
1268 | lcounter = (long long)mp->m_sb.sb_icount; | |
1269 | lcounter += delta; | |
1270 | if (lcounter < 0) { | |
1271 | ASSERT(0); | |
1272 | return (XFS_ERROR(EINVAL)); | |
1273 | } | |
1274 | mp->m_sb.sb_icount = lcounter; | |
1275 | return (0); | |
1276 | case XFS_SBS_IFREE: | |
1277 | lcounter = (long long)mp->m_sb.sb_ifree; | |
1278 | lcounter += delta; | |
1279 | if (lcounter < 0) { | |
1280 | ASSERT(0); | |
1281 | return (XFS_ERROR(EINVAL)); | |
1282 | } | |
1283 | mp->m_sb.sb_ifree = lcounter; | |
1284 | return (0); | |
1285 | case XFS_SBS_FDBLOCKS: | |
1286 | ||
1287 | lcounter = (long long)mp->m_sb.sb_fdblocks; | |
1288 | res_used = (long long)(mp->m_resblks - mp->m_resblks_avail); | |
1289 | ||
1290 | if (delta > 0) { /* Putting blocks back */ | |
1291 | if (res_used > delta) { | |
1292 | mp->m_resblks_avail += delta; | |
1293 | } else { | |
1294 | rem = delta - res_used; | |
1295 | mp->m_resblks_avail = mp->m_resblks; | |
1296 | lcounter += rem; | |
1297 | } | |
1298 | } else { /* Taking blocks away */ | |
1299 | ||
1300 | lcounter += delta; | |
1301 | ||
1302 | /* | |
1303 | * If were out of blocks, use any available reserved blocks if | |
1304 | * were allowed to. | |
1305 | */ | |
1306 | ||
1307 | if (lcounter < 0) { | |
1308 | if (rsvd) { | |
1309 | lcounter = (long long)mp->m_resblks_avail + delta; | |
1310 | if (lcounter < 0) { | |
1311 | return (XFS_ERROR(ENOSPC)); | |
1312 | } | |
1313 | mp->m_resblks_avail = lcounter; | |
1314 | return (0); | |
1315 | } else { /* not reserved */ | |
1316 | return (XFS_ERROR(ENOSPC)); | |
1317 | } | |
1318 | } | |
1319 | } | |
1320 | ||
1321 | mp->m_sb.sb_fdblocks = lcounter; | |
1322 | return (0); | |
1323 | case XFS_SBS_FREXTENTS: | |
1324 | lcounter = (long long)mp->m_sb.sb_frextents; | |
1325 | lcounter += delta; | |
1326 | if (lcounter < 0) { | |
1327 | return (XFS_ERROR(ENOSPC)); | |
1328 | } | |
1329 | mp->m_sb.sb_frextents = lcounter; | |
1330 | return (0); | |
1331 | case XFS_SBS_DBLOCKS: | |
1332 | lcounter = (long long)mp->m_sb.sb_dblocks; | |
1333 | lcounter += delta; | |
1334 | if (lcounter < 0) { | |
1335 | ASSERT(0); | |
1336 | return (XFS_ERROR(EINVAL)); | |
1337 | } | |
1338 | mp->m_sb.sb_dblocks = lcounter; | |
1339 | return (0); | |
1340 | case XFS_SBS_AGCOUNT: | |
1341 | scounter = mp->m_sb.sb_agcount; | |
1342 | scounter += delta; | |
1343 | if (scounter < 0) { | |
1344 | ASSERT(0); | |
1345 | return (XFS_ERROR(EINVAL)); | |
1346 | } | |
1347 | mp->m_sb.sb_agcount = scounter; | |
1348 | return (0); | |
1349 | case XFS_SBS_IMAX_PCT: | |
1350 | scounter = mp->m_sb.sb_imax_pct; | |
1351 | scounter += delta; | |
1352 | if (scounter < 0) { | |
1353 | ASSERT(0); | |
1354 | return (XFS_ERROR(EINVAL)); | |
1355 | } | |
1356 | mp->m_sb.sb_imax_pct = scounter; | |
1357 | return (0); | |
1358 | case XFS_SBS_REXTSIZE: | |
1359 | scounter = mp->m_sb.sb_rextsize; | |
1360 | scounter += delta; | |
1361 | if (scounter < 0) { | |
1362 | ASSERT(0); | |
1363 | return (XFS_ERROR(EINVAL)); | |
1364 | } | |
1365 | mp->m_sb.sb_rextsize = scounter; | |
1366 | return (0); | |
1367 | case XFS_SBS_RBMBLOCKS: | |
1368 | scounter = mp->m_sb.sb_rbmblocks; | |
1369 | scounter += delta; | |
1370 | if (scounter < 0) { | |
1371 | ASSERT(0); | |
1372 | return (XFS_ERROR(EINVAL)); | |
1373 | } | |
1374 | mp->m_sb.sb_rbmblocks = scounter; | |
1375 | return (0); | |
1376 | case XFS_SBS_RBLOCKS: | |
1377 | lcounter = (long long)mp->m_sb.sb_rblocks; | |
1378 | lcounter += delta; | |
1379 | if (lcounter < 0) { | |
1380 | ASSERT(0); | |
1381 | return (XFS_ERROR(EINVAL)); | |
1382 | } | |
1383 | mp->m_sb.sb_rblocks = lcounter; | |
1384 | return (0); | |
1385 | case XFS_SBS_REXTENTS: | |
1386 | lcounter = (long long)mp->m_sb.sb_rextents; | |
1387 | lcounter += delta; | |
1388 | if (lcounter < 0) { | |
1389 | ASSERT(0); | |
1390 | return (XFS_ERROR(EINVAL)); | |
1391 | } | |
1392 | mp->m_sb.sb_rextents = lcounter; | |
1393 | return (0); | |
1394 | case XFS_SBS_REXTSLOG: | |
1395 | scounter = mp->m_sb.sb_rextslog; | |
1396 | scounter += delta; | |
1397 | if (scounter < 0) { | |
1398 | ASSERT(0); | |
1399 | return (XFS_ERROR(EINVAL)); | |
1400 | } | |
1401 | mp->m_sb.sb_rextslog = scounter; | |
1402 | return (0); | |
1403 | default: | |
1404 | ASSERT(0); | |
1405 | return (XFS_ERROR(EINVAL)); | |
1406 | } | |
1407 | } | |
1408 | ||
1409 | /* | |
1410 | * xfs_mod_incore_sb() is used to change a field in the in-core | |
1411 | * superblock structure by the specified delta. This modification | |
1412 | * is protected by the SB_LOCK. Just use the xfs_mod_incore_sb_unlocked() | |
1413 | * routine to do the work. | |
1414 | */ | |
1415 | int | |
1416 | xfs_mod_incore_sb(xfs_mount_t *mp, xfs_sb_field_t field, int delta, int rsvd) | |
1417 | { | |
1418 | unsigned long s; | |
1419 | int status; | |
1420 | ||
1421 | s = XFS_SB_LOCK(mp); | |
1422 | status = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd); | |
1423 | XFS_SB_UNLOCK(mp, s); | |
1424 | return (status); | |
1425 | } | |
1426 | ||
1427 | /* | |
1428 | * xfs_mod_incore_sb_batch() is used to change more than one field | |
1429 | * in the in-core superblock structure at a time. This modification | |
1430 | * is protected by a lock internal to this module. The fields and | |
1431 | * changes to those fields are specified in the array of xfs_mod_sb | |
1432 | * structures passed in. | |
1433 | * | |
1434 | * Either all of the specified deltas will be applied or none of | |
1435 | * them will. If any modified field dips below 0, then all modifications | |
1436 | * will be backed out and EINVAL will be returned. | |
1437 | */ | |
1438 | int | |
1439 | xfs_mod_incore_sb_batch(xfs_mount_t *mp, xfs_mod_sb_t *msb, uint nmsb, int rsvd) | |
1440 | { | |
1441 | unsigned long s; | |
1442 | int status=0; | |
1443 | xfs_mod_sb_t *msbp; | |
1444 | ||
1445 | /* | |
1446 | * Loop through the array of mod structures and apply each | |
1447 | * individually. If any fail, then back out all those | |
1448 | * which have already been applied. Do all of this within | |
1449 | * the scope of the SB_LOCK so that all of the changes will | |
1450 | * be atomic. | |
1451 | */ | |
1452 | s = XFS_SB_LOCK(mp); | |
1453 | msbp = &msb[0]; | |
1454 | for (msbp = &msbp[0]; msbp < (msb + nmsb); msbp++) { | |
1455 | /* | |
1456 | * Apply the delta at index n. If it fails, break | |
1457 | * from the loop so we'll fall into the undo loop | |
1458 | * below. | |
1459 | */ | |
1460 | status = xfs_mod_incore_sb_unlocked(mp, msbp->msb_field, | |
1461 | msbp->msb_delta, rsvd); | |
1462 | if (status != 0) { | |
1463 | break; | |
1464 | } | |
1465 | } | |
1466 | ||
1467 | /* | |
1468 | * If we didn't complete the loop above, then back out | |
1469 | * any changes made to the superblock. If you add code | |
1470 | * between the loop above and here, make sure that you | |
1471 | * preserve the value of status. Loop back until | |
1472 | * we step below the beginning of the array. Make sure | |
1473 | * we don't touch anything back there. | |
1474 | */ | |
1475 | if (status != 0) { | |
1476 | msbp--; | |
1477 | while (msbp >= msb) { | |
1478 | status = xfs_mod_incore_sb_unlocked(mp, | |
1479 | msbp->msb_field, -(msbp->msb_delta), rsvd); | |
1480 | ASSERT(status == 0); | |
1481 | msbp--; | |
1482 | } | |
1483 | } | |
1484 | XFS_SB_UNLOCK(mp, s); | |
1485 | return (status); | |
1486 | } | |
1487 | ||
1488 | /* | |
1489 | * xfs_getsb() is called to obtain the buffer for the superblock. | |
1490 | * The buffer is returned locked and read in from disk. | |
1491 | * The buffer should be released with a call to xfs_brelse(). | |
1492 | * | |
1493 | * If the flags parameter is BUF_TRYLOCK, then we'll only return | |
1494 | * the superblock buffer if it can be locked without sleeping. | |
1495 | * If it can't then we'll return NULL. | |
1496 | */ | |
1497 | xfs_buf_t * | |
1498 | xfs_getsb( | |
1499 | xfs_mount_t *mp, | |
1500 | int flags) | |
1501 | { | |
1502 | xfs_buf_t *bp; | |
1503 | ||
1504 | ASSERT(mp->m_sb_bp != NULL); | |
1505 | bp = mp->m_sb_bp; | |
1506 | if (flags & XFS_BUF_TRYLOCK) { | |
1507 | if (!XFS_BUF_CPSEMA(bp)) { | |
1508 | return NULL; | |
1509 | } | |
1510 | } else { | |
1511 | XFS_BUF_PSEMA(bp, PRIBIO); | |
1512 | } | |
1513 | XFS_BUF_HOLD(bp); | |
1514 | ASSERT(XFS_BUF_ISDONE(bp)); | |
1515 | return (bp); | |
1516 | } | |
1517 | ||
1518 | /* | |
1519 | * Used to free the superblock along various error paths. | |
1520 | */ | |
1521 | void | |
1522 | xfs_freesb( | |
1523 | xfs_mount_t *mp) | |
1524 | { | |
1525 | xfs_buf_t *bp; | |
1526 | ||
1527 | /* | |
1528 | * Use xfs_getsb() so that the buffer will be locked | |
1529 | * when we call xfs_buf_relse(). | |
1530 | */ | |
1531 | bp = xfs_getsb(mp, 0); | |
1532 | XFS_BUF_UNMANAGE(bp); | |
1533 | xfs_buf_relse(bp); | |
1534 | mp->m_sb_bp = NULL; | |
1535 | } | |
1536 | ||
1537 | /* | |
1538 | * See if the UUID is unique among mounted XFS filesystems. | |
1539 | * Mount fails if UUID is nil or a FS with the same UUID is already mounted. | |
1540 | */ | |
1541 | STATIC int | |
1542 | xfs_uuid_mount( | |
1543 | xfs_mount_t *mp) | |
1544 | { | |
1545 | if (uuid_is_nil(&mp->m_sb.sb_uuid)) { | |
1546 | cmn_err(CE_WARN, | |
1547 | "XFS: Filesystem %s has nil UUID - can't mount", | |
1548 | mp->m_fsname); | |
1549 | return -1; | |
1550 | } | |
1551 | if (!uuid_table_insert(&mp->m_sb.sb_uuid)) { | |
1552 | cmn_err(CE_WARN, | |
1553 | "XFS: Filesystem %s has duplicate UUID - can't mount", | |
1554 | mp->m_fsname); | |
1555 | return -1; | |
1556 | } | |
1557 | return 0; | |
1558 | } | |
1559 | ||
1560 | /* | |
1561 | * Remove filesystem from the UUID table. | |
1562 | */ | |
1563 | STATIC void | |
1564 | xfs_uuid_unmount( | |
1565 | xfs_mount_t *mp) | |
1566 | { | |
1567 | uuid_table_remove(&mp->m_sb.sb_uuid); | |
1568 | } | |
1569 | ||
1570 | /* | |
1571 | * Used to log changes to the superblock unit and width fields which could | |
1572 | * be altered by the mount options. Only the first superblock is updated. | |
1573 | */ | |
1574 | STATIC void | |
1575 | xfs_mount_log_sbunit( | |
1576 | xfs_mount_t *mp, | |
1577 | __int64_t fields) | |
1578 | { | |
1579 | xfs_trans_t *tp; | |
1580 | ||
1581 | ASSERT(fields & (XFS_SB_UNIT|XFS_SB_WIDTH|XFS_SB_UUID)); | |
1582 | ||
1583 | tp = xfs_trans_alloc(mp, XFS_TRANS_SB_UNIT); | |
1584 | if (xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0, | |
1585 | XFS_DEFAULT_LOG_COUNT)) { | |
1586 | xfs_trans_cancel(tp, 0); | |
1587 | return; | |
1588 | } | |
1589 | xfs_mod_sb(tp, fields); | |
1590 | xfs_trans_commit(tp, 0, NULL); | |
1591 | } |