Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
1da177e4 | 20 | #include "xfs_types.h" |
1da177e4 LT |
21 | #include "xfs_log.h" |
22 | #include "xfs_trans.h" | |
23 | #include "xfs_sb.h" | |
a844f451 | 24 | #include "xfs_ag.h" |
1da177e4 | 25 | #include "xfs_mount.h" |
1da177e4 | 26 | #include "xfs_bmap_btree.h" |
a844f451 | 27 | #include "xfs_alloc_btree.h" |
1da177e4 | 28 | #include "xfs_ialloc_btree.h" |
a844f451 NS |
29 | #include "xfs_dinode.h" |
30 | #include "xfs_inode.h" | |
31 | #include "xfs_inode_item.h" | |
1da177e4 LT |
32 | #include "xfs_btree.h" |
33 | #include "xfs_error.h" | |
34 | #include "xfs_alloc.h" | |
35 | #include "xfs_ialloc.h" | |
36 | #include "xfs_fsops.h" | |
37 | #include "xfs_itable.h" | |
1da177e4 LT |
38 | #include "xfs_trans_space.h" |
39 | #include "xfs_rtalloc.h" | |
2a82b8be | 40 | #include "xfs_filestream.h" |
0b1b213f | 41 | #include "xfs_trace.h" |
1da177e4 LT |
42 | |
43 | /* | |
44 | * File system operations | |
45 | */ | |
46 | ||
47 | int | |
48 | xfs_fs_geometry( | |
49 | xfs_mount_t *mp, | |
50 | xfs_fsop_geom_t *geo, | |
51 | int new_version) | |
52 | { | |
c4d0c3b0 DR |
53 | |
54 | memset(geo, 0, sizeof(*geo)); | |
55 | ||
1da177e4 LT |
56 | geo->blocksize = mp->m_sb.sb_blocksize; |
57 | geo->rtextsize = mp->m_sb.sb_rextsize; | |
58 | geo->agblocks = mp->m_sb.sb_agblocks; | |
59 | geo->agcount = mp->m_sb.sb_agcount; | |
60 | geo->logblocks = mp->m_sb.sb_logblocks; | |
61 | geo->sectsize = mp->m_sb.sb_sectsize; | |
62 | geo->inodesize = mp->m_sb.sb_inodesize; | |
63 | geo->imaxpct = mp->m_sb.sb_imax_pct; | |
64 | geo->datablocks = mp->m_sb.sb_dblocks; | |
65 | geo->rtblocks = mp->m_sb.sb_rblocks; | |
66 | geo->rtextents = mp->m_sb.sb_rextents; | |
67 | geo->logstart = mp->m_sb.sb_logstart; | |
68 | ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid)); | |
69 | memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid)); | |
70 | if (new_version >= 2) { | |
71 | geo->sunit = mp->m_sb.sb_unit; | |
72 | geo->swidth = mp->m_sb.sb_width; | |
73 | } | |
74 | if (new_version >= 3) { | |
75 | geo->version = XFS_FSOP_GEOM_VERSION; | |
76 | geo->flags = | |
62118709 | 77 | (xfs_sb_version_hasattr(&mp->m_sb) ? |
1da177e4 | 78 | XFS_FSOP_GEOM_FLAGS_ATTR : 0) | |
62118709 | 79 | (xfs_sb_version_hasnlink(&mp->m_sb) ? |
1da177e4 | 80 | XFS_FSOP_GEOM_FLAGS_NLINK : 0) | |
62118709 | 81 | (xfs_sb_version_hasquota(&mp->m_sb) ? |
1da177e4 | 82 | XFS_FSOP_GEOM_FLAGS_QUOTA : 0) | |
62118709 | 83 | (xfs_sb_version_hasalign(&mp->m_sb) ? |
1da177e4 | 84 | XFS_FSOP_GEOM_FLAGS_IALIGN : 0) | |
62118709 | 85 | (xfs_sb_version_hasdalign(&mp->m_sb) ? |
1da177e4 | 86 | XFS_FSOP_GEOM_FLAGS_DALIGN : 0) | |
62118709 | 87 | (xfs_sb_version_hasshared(&mp->m_sb) ? |
1da177e4 | 88 | XFS_FSOP_GEOM_FLAGS_SHARED : 0) | |
62118709 | 89 | (xfs_sb_version_hasextflgbit(&mp->m_sb) ? |
1da177e4 | 90 | XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) | |
62118709 | 91 | (xfs_sb_version_hasdirv2(&mp->m_sb) ? |
1da177e4 | 92 | XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) | |
62118709 | 93 | (xfs_sb_version_hassector(&mp->m_sb) ? |
d8cc890d | 94 | XFS_FSOP_GEOM_FLAGS_SECTOR : 0) | |
189f4bf2 BN |
95 | (xfs_sb_version_hasasciici(&mp->m_sb) ? |
96 | XFS_FSOP_GEOM_FLAGS_DIRV2CI : 0) | | |
92821e2b DC |
97 | (xfs_sb_version_haslazysbcount(&mp->m_sb) ? |
98 | XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) | | |
62118709 | 99 | (xfs_sb_version_hasattr2(&mp->m_sb) ? |
69a58a43 ES |
100 | XFS_FSOP_GEOM_FLAGS_ATTR2 : 0) | |
101 | (xfs_sb_version_hasprojid32bit(&mp->m_sb) ? | |
102 | XFS_FSOP_GEOM_FLAGS_PROJID32 : 0); | |
62118709 | 103 | geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ? |
1da177e4 LT |
104 | mp->m_sb.sb_logsectsize : BBSIZE; |
105 | geo->rtsectsize = mp->m_sb.sb_blocksize; | |
106 | geo->dirblocksize = mp->m_dirblksize; | |
107 | } | |
108 | if (new_version >= 4) { | |
109 | geo->flags |= | |
62118709 | 110 | (xfs_sb_version_haslogv2(&mp->m_sb) ? |
1da177e4 LT |
111 | XFS_FSOP_GEOM_FLAGS_LOGV2 : 0); |
112 | geo->logsunit = mp->m_sb.sb_logsunit; | |
113 | } | |
114 | return 0; | |
115 | } | |
116 | ||
fd23683c DC |
117 | static struct xfs_buf * |
118 | xfs_growfs_get_hdr_buf( | |
119 | struct xfs_mount *mp, | |
120 | xfs_daddr_t blkno, | |
121 | size_t numblks, | |
122 | int flags) | |
123 | { | |
124 | struct xfs_buf *bp; | |
125 | ||
126 | bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags); | |
127 | if (!bp) | |
128 | return NULL; | |
129 | ||
130 | xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); | |
131 | bp->b_bn = blkno; | |
132 | bp->b_maps[0].bm_bn = blkno; | |
133 | ||
134 | return bp; | |
135 | } | |
136 | ||
1da177e4 LT |
137 | static int |
138 | xfs_growfs_data_private( | |
139 | xfs_mount_t *mp, /* mount point for filesystem */ | |
140 | xfs_growfs_data_t *in) /* growfs data input struct */ | |
141 | { | |
142 | xfs_agf_t *agf; | |
143 | xfs_agi_t *agi; | |
144 | xfs_agnumber_t agno; | |
145 | xfs_extlen_t agsize; | |
146 | xfs_extlen_t tmpsize; | |
147 | xfs_alloc_rec_t *arec; | |
1da177e4 LT |
148 | xfs_buf_t *bp; |
149 | int bucket; | |
150 | int dpct; | |
151 | int error; | |
152 | xfs_agnumber_t nagcount; | |
153 | xfs_agnumber_t nagimax = 0; | |
154 | xfs_rfsblock_t nb, nb_mod; | |
155 | xfs_rfsblock_t new; | |
156 | xfs_rfsblock_t nfree; | |
157 | xfs_agnumber_t oagcount; | |
158 | int pct; | |
1da177e4 LT |
159 | xfs_trans_t *tp; |
160 | ||
161 | nb = in->newblocks; | |
162 | pct = in->imaxpct; | |
163 | if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100) | |
164 | return XFS_ERROR(EINVAL); | |
4cc929ee NS |
165 | if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb))) |
166 | return error; | |
1da177e4 | 167 | dpct = pct - mp->m_sb.sb_imax_pct; |
e70b73f8 | 168 | bp = xfs_buf_read_uncached(mp->m_ddev_targp, |
1922c949 | 169 | XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1), |
e70b73f8 | 170 | XFS_FSS_TO_BB(mp, 1), 0); |
1922c949 DC |
171 | if (!bp) |
172 | return EIO; | |
1da177e4 LT |
173 | xfs_buf_relse(bp); |
174 | ||
175 | new = nb; /* use new as a temporary here */ | |
176 | nb_mod = do_div(new, mp->m_sb.sb_agblocks); | |
177 | nagcount = new + (nb_mod != 0); | |
178 | if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) { | |
179 | nagcount--; | |
e6da7c9f | 180 | nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks; |
1da177e4 LT |
181 | if (nb < mp->m_sb.sb_dblocks) |
182 | return XFS_ERROR(EINVAL); | |
183 | } | |
184 | new = nb - mp->m_sb.sb_dblocks; | |
185 | oagcount = mp->m_sb.sb_agcount; | |
0cc6eee1 | 186 | |
1c1c6ebc DC |
187 | /* allocate the new per-ag structures */ |
188 | if (nagcount > oagcount) { | |
189 | error = xfs_initialize_perag(mp, nagcount, &nagimax); | |
190 | if (error) | |
191 | return error; | |
1da177e4 | 192 | } |
1c1c6ebc | 193 | |
1da177e4 | 194 | tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS); |
84e1e99f | 195 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
196 | if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp), |
197 | XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) { | |
198 | xfs_trans_cancel(tp, 0); | |
199 | return error; | |
200 | } | |
201 | ||
1c1c6ebc DC |
202 | /* |
203 | * Write new AG headers to disk. Non-transactional, but written | |
204 | * synchronously so they are completed prior to the growfs transaction | |
205 | * being logged. | |
206 | */ | |
1da177e4 LT |
207 | nfree = 0; |
208 | for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) { | |
209 | /* | |
210 | * AG freelist header block | |
211 | */ | |
fd23683c DC |
212 | bp = xfs_growfs_get_hdr_buf(mp, |
213 | XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), | |
214 | XFS_FSS_TO_BB(mp, 1), 0); | |
b522950f CS |
215 | if (!bp) { |
216 | error = ENOMEM; | |
217 | goto error0; | |
218 | } | |
fd23683c | 219 | |
1da177e4 | 220 | agf = XFS_BUF_TO_AGF(bp); |
16259e7d CH |
221 | agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC); |
222 | agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION); | |
223 | agf->agf_seqno = cpu_to_be32(agno); | |
1da177e4 LT |
224 | if (agno == nagcount - 1) |
225 | agsize = | |
226 | nb - | |
227 | (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks); | |
228 | else | |
229 | agsize = mp->m_sb.sb_agblocks; | |
16259e7d CH |
230 | agf->agf_length = cpu_to_be32(agsize); |
231 | agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp)); | |
232 | agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp)); | |
233 | agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1); | |
234 | agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1); | |
1da177e4 | 235 | agf->agf_flfirst = 0; |
16259e7d | 236 | agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1); |
1da177e4 LT |
237 | agf->agf_flcount = 0; |
238 | tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp); | |
16259e7d CH |
239 | agf->agf_freeblks = cpu_to_be32(tmpsize); |
240 | agf->agf_longest = cpu_to_be32(tmpsize); | |
c2b006c1 CH |
241 | error = xfs_bwrite(bp); |
242 | xfs_buf_relse(bp); | |
243 | if (error) | |
1da177e4 | 244 | goto error0; |
c2b006c1 | 245 | |
1da177e4 LT |
246 | /* |
247 | * AG inode header block | |
248 | */ | |
fd23683c DC |
249 | bp = xfs_growfs_get_hdr_buf(mp, |
250 | XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), | |
251 | XFS_FSS_TO_BB(mp, 1), 0); | |
b522950f CS |
252 | if (!bp) { |
253 | error = ENOMEM; | |
254 | goto error0; | |
255 | } | |
fd23683c | 256 | |
1da177e4 | 257 | agi = XFS_BUF_TO_AGI(bp); |
16259e7d CH |
258 | agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC); |
259 | agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION); | |
260 | agi->agi_seqno = cpu_to_be32(agno); | |
261 | agi->agi_length = cpu_to_be32(agsize); | |
1da177e4 | 262 | agi->agi_count = 0; |
16259e7d CH |
263 | agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp)); |
264 | agi->agi_level = cpu_to_be32(1); | |
1da177e4 | 265 | agi->agi_freecount = 0; |
16259e7d CH |
266 | agi->agi_newino = cpu_to_be32(NULLAGINO); |
267 | agi->agi_dirino = cpu_to_be32(NULLAGINO); | |
1da177e4 | 268 | for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) |
16259e7d | 269 | agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); |
c2b006c1 CH |
270 | error = xfs_bwrite(bp); |
271 | xfs_buf_relse(bp); | |
272 | if (error) | |
1da177e4 | 273 | goto error0; |
c2b006c1 | 274 | |
1da177e4 LT |
275 | /* |
276 | * BNO btree root block | |
277 | */ | |
fd23683c DC |
278 | bp = xfs_growfs_get_hdr_buf(mp, |
279 | XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), | |
280 | BTOBB(mp->m_sb.sb_blocksize), 0); | |
281 | ||
b522950f CS |
282 | if (!bp) { |
283 | error = ENOMEM; | |
284 | goto error0; | |
285 | } | |
b64f3a39 | 286 | |
fd23683c | 287 | xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1, 0); |
b64f3a39 | 288 | arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); |
16259e7d CH |
289 | arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); |
290 | arec->ar_blockcount = cpu_to_be32( | |
291 | agsize - be32_to_cpu(arec->ar_startblock)); | |
b64f3a39 | 292 | |
c2b006c1 CH |
293 | error = xfs_bwrite(bp); |
294 | xfs_buf_relse(bp); | |
295 | if (error) | |
1da177e4 | 296 | goto error0; |
c2b006c1 | 297 | |
1da177e4 LT |
298 | /* |
299 | * CNT btree root block | |
300 | */ | |
fd23683c DC |
301 | bp = xfs_growfs_get_hdr_buf(mp, |
302 | XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)), | |
303 | BTOBB(mp->m_sb.sb_blocksize), 0); | |
b522950f CS |
304 | if (!bp) { |
305 | error = ENOMEM; | |
306 | goto error0; | |
307 | } | |
b64f3a39 | 308 | |
fd23683c | 309 | xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1, 0); |
b64f3a39 | 310 | arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); |
16259e7d CH |
311 | arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); |
312 | arec->ar_blockcount = cpu_to_be32( | |
313 | agsize - be32_to_cpu(arec->ar_startblock)); | |
314 | nfree += be32_to_cpu(arec->ar_blockcount); | |
b64f3a39 | 315 | |
c2b006c1 CH |
316 | error = xfs_bwrite(bp); |
317 | xfs_buf_relse(bp); | |
318 | if (error) | |
1da177e4 | 319 | goto error0; |
c2b006c1 | 320 | |
1da177e4 LT |
321 | /* |
322 | * INO btree root block | |
323 | */ | |
fd23683c DC |
324 | bp = xfs_growfs_get_hdr_buf(mp, |
325 | XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), | |
326 | BTOBB(mp->m_sb.sb_blocksize), 0); | |
b522950f CS |
327 | if (!bp) { |
328 | error = ENOMEM; | |
329 | goto error0; | |
330 | } | |
fd23683c | 331 | |
b64f3a39 DC |
332 | xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0, 0); |
333 | ||
c2b006c1 CH |
334 | error = xfs_bwrite(bp); |
335 | xfs_buf_relse(bp); | |
336 | if (error) | |
1da177e4 | 337 | goto error0; |
1da177e4 LT |
338 | } |
339 | xfs_trans_agblocks_delta(tp, nfree); | |
340 | /* | |
341 | * There are new blocks in the old last a.g. | |
342 | */ | |
343 | if (new) { | |
344 | /* | |
345 | * Change the agi length. | |
346 | */ | |
347 | error = xfs_ialloc_read_agi(mp, tp, agno, &bp); | |
348 | if (error) { | |
349 | goto error0; | |
350 | } | |
351 | ASSERT(bp); | |
352 | agi = XFS_BUF_TO_AGI(bp); | |
413d57c9 | 353 | be32_add_cpu(&agi->agi_length, new); |
1da177e4 | 354 | ASSERT(nagcount == oagcount || |
16259e7d | 355 | be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks); |
1da177e4 LT |
356 | xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH); |
357 | /* | |
358 | * Change agf length. | |
359 | */ | |
360 | error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp); | |
361 | if (error) { | |
362 | goto error0; | |
363 | } | |
364 | ASSERT(bp); | |
365 | agf = XFS_BUF_TO_AGF(bp); | |
413d57c9 | 366 | be32_add_cpu(&agf->agf_length, new); |
16259e7d CH |
367 | ASSERT(be32_to_cpu(agf->agf_length) == |
368 | be32_to_cpu(agi->agi_length)); | |
0b1b213f | 369 | |
0164af51 | 370 | xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH); |
1da177e4 LT |
371 | /* |
372 | * Free the new space. | |
373 | */ | |
374 | error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno, | |
16259e7d | 375 | be32_to_cpu(agf->agf_length) - new), new); |
1da177e4 LT |
376 | if (error) { |
377 | goto error0; | |
378 | } | |
379 | } | |
1c1c6ebc DC |
380 | |
381 | /* | |
382 | * Update changed superblock fields transactionally. These are not | |
383 | * seen by the rest of the world until the transaction commit applies | |
384 | * them atomically to the superblock. | |
385 | */ | |
1da177e4 LT |
386 | if (nagcount > oagcount) |
387 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount); | |
388 | if (nb > mp->m_sb.sb_dblocks) | |
389 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, | |
390 | nb - mp->m_sb.sb_dblocks); | |
391 | if (nfree) | |
392 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree); | |
393 | if (dpct) | |
394 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct); | |
1c72bf90 | 395 | error = xfs_trans_commit(tp, 0); |
1c1c6ebc | 396 | if (error) |
1da177e4 | 397 | return error; |
1c1c6ebc | 398 | |
1da177e4 LT |
399 | /* New allocation groups fully initialized, so update mount struct */ |
400 | if (nagimax) | |
401 | mp->m_maxagi = nagimax; | |
402 | if (mp->m_sb.sb_imax_pct) { | |
403 | __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct; | |
404 | do_div(icount, 100); | |
405 | mp->m_maxicount = icount << mp->m_sb.sb_inopblog; | |
406 | } else | |
407 | mp->m_maxicount = 0; | |
055388a3 | 408 | xfs_set_low_space_thresholds(mp); |
1c1c6ebc DC |
409 | |
410 | /* update secondary superblocks. */ | |
1da177e4 | 411 | for (agno = 1; agno < nagcount; agno++) { |
1375cb65 DC |
412 | error = 0; |
413 | /* | |
414 | * new secondary superblocks need to be zeroed, not read from | |
415 | * disk as the contents of the new area we are growing into is | |
416 | * completely unknown. | |
417 | */ | |
418 | if (agno < oagcount) { | |
419 | error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, | |
1da177e4 LT |
420 | XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), |
421 | XFS_FSS_TO_BB(mp, 1), 0, &bp); | |
1375cb65 DC |
422 | } else { |
423 | bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp, | |
424 | XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
425 | XFS_FSS_TO_BB(mp, 1), 0); | |
426 | if (bp) | |
427 | xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); | |
428 | else | |
429 | error = ENOMEM; | |
430 | } | |
431 | ||
1da177e4 | 432 | if (error) { |
53487786 DC |
433 | xfs_warn(mp, |
434 | "error %d reading secondary superblock for ag %d", | |
1da177e4 LT |
435 | error, agno); |
436 | break; | |
437 | } | |
2bdf7cd0 | 438 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS); |
1da177e4 LT |
439 | /* |
440 | * If we get an error writing out the alternate superblocks, | |
441 | * just issue a warning and continue. The real work is | |
442 | * already done and committed. | |
443 | */ | |
c2b006c1 CH |
444 | error = xfs_bwrite(bp); |
445 | xfs_buf_relse(bp); | |
446 | if (error) { | |
53487786 | 447 | xfs_warn(mp, |
1da177e4 LT |
448 | "write error %d updating secondary superblock for ag %d", |
449 | error, agno); | |
450 | break; /* no point in continuing */ | |
451 | } | |
452 | } | |
1375cb65 | 453 | return error; |
1da177e4 LT |
454 | |
455 | error0: | |
456 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); | |
457 | return error; | |
458 | } | |
459 | ||
460 | static int | |
461 | xfs_growfs_log_private( | |
462 | xfs_mount_t *mp, /* mount point for filesystem */ | |
463 | xfs_growfs_log_t *in) /* growfs log input struct */ | |
464 | { | |
465 | xfs_extlen_t nb; | |
466 | ||
467 | nb = in->newblocks; | |
468 | if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES)) | |
469 | return XFS_ERROR(EINVAL); | |
470 | if (nb == mp->m_sb.sb_logblocks && | |
471 | in->isint == (mp->m_sb.sb_logstart != 0)) | |
472 | return XFS_ERROR(EINVAL); | |
473 | /* | |
474 | * Moving the log is hard, need new interfaces to sync | |
475 | * the log first, hold off all activity while moving it. | |
476 | * Can have shorter or longer log in the same space, | |
477 | * or transform internal to external log or vice versa. | |
478 | */ | |
479 | return XFS_ERROR(ENOSYS); | |
480 | } | |
481 | ||
482 | /* | |
483 | * protected versions of growfs function acquire and release locks on the mount | |
484 | * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG, | |
485 | * XFS_IOC_FSGROWFSRT | |
486 | */ | |
487 | ||
488 | ||
489 | int | |
490 | xfs_growfs_data( | |
491 | xfs_mount_t *mp, | |
492 | xfs_growfs_data_t *in) | |
493 | { | |
494 | int error; | |
743bb465 | 495 | |
496 | if (!capable(CAP_SYS_ADMIN)) | |
497 | return XFS_ERROR(EPERM); | |
cc92e7ac | 498 | if (!mutex_trylock(&mp->m_growlock)) |
1da177e4 LT |
499 | return XFS_ERROR(EWOULDBLOCK); |
500 | error = xfs_growfs_data_private(mp, in); | |
cc92e7ac | 501 | mutex_unlock(&mp->m_growlock); |
1da177e4 LT |
502 | return error; |
503 | } | |
504 | ||
505 | int | |
506 | xfs_growfs_log( | |
507 | xfs_mount_t *mp, | |
508 | xfs_growfs_log_t *in) | |
509 | { | |
510 | int error; | |
743bb465 | 511 | |
512 | if (!capable(CAP_SYS_ADMIN)) | |
513 | return XFS_ERROR(EPERM); | |
cc92e7ac | 514 | if (!mutex_trylock(&mp->m_growlock)) |
1da177e4 LT |
515 | return XFS_ERROR(EWOULDBLOCK); |
516 | error = xfs_growfs_log_private(mp, in); | |
cc92e7ac | 517 | mutex_unlock(&mp->m_growlock); |
1da177e4 LT |
518 | return error; |
519 | } | |
520 | ||
521 | /* | |
522 | * exported through ioctl XFS_IOC_FSCOUNTS | |
523 | */ | |
524 | ||
525 | int | |
526 | xfs_fs_counts( | |
527 | xfs_mount_t *mp, | |
528 | xfs_fsop_counts_t *cnt) | |
529 | { | |
d4d90b57 | 530 | xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); |
3685c2a1 | 531 | spin_lock(&mp->m_sb_lock); |
4be536de | 532 | cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); |
1da177e4 LT |
533 | cnt->freertx = mp->m_sb.sb_frextents; |
534 | cnt->freeino = mp->m_sb.sb_ifree; | |
535 | cnt->allocino = mp->m_sb.sb_icount; | |
3685c2a1 | 536 | spin_unlock(&mp->m_sb_lock); |
1da177e4 LT |
537 | return 0; |
538 | } | |
539 | ||
540 | /* | |
541 | * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS | |
542 | * | |
543 | * xfs_reserve_blocks is called to set m_resblks | |
544 | * in the in-core mount table. The number of unused reserved blocks | |
c41564b5 | 545 | * is kept in m_resblks_avail. |
1da177e4 LT |
546 | * |
547 | * Reserve the requested number of blocks if available. Otherwise return | |
548 | * as many as possible to satisfy the request. The actual number | |
549 | * reserved are returned in outval | |
550 | * | |
551 | * A null inval pointer indicates that only the current reserved blocks | |
552 | * available should be returned no settings are changed. | |
553 | */ | |
554 | ||
555 | int | |
556 | xfs_reserve_blocks( | |
557 | xfs_mount_t *mp, | |
558 | __uint64_t *inval, | |
559 | xfs_fsop_resblks_t *outval) | |
560 | { | |
dbcabad1 | 561 | __int64_t lcounter, delta, fdblks_delta; |
1da177e4 | 562 | __uint64_t request; |
1da177e4 LT |
563 | |
564 | /* If inval is null, report current values and return */ | |
1da177e4 | 565 | if (inval == (__uint64_t *)NULL) { |
84e1e99f DC |
566 | if (!outval) |
567 | return EINVAL; | |
1da177e4 LT |
568 | outval->resblks = mp->m_resblks; |
569 | outval->resblks_avail = mp->m_resblks_avail; | |
014c2544 | 570 | return 0; |
1da177e4 LT |
571 | } |
572 | ||
573 | request = *inval; | |
dbcabad1 DC |
574 | |
575 | /* | |
576 | * With per-cpu counters, this becomes an interesting | |
577 | * problem. we needto work out if we are freeing or allocation | |
578 | * blocks first, then we can do the modification as necessary. | |
579 | * | |
3685c2a1 | 580 | * We do this under the m_sb_lock so that if we are near |
dbcabad1 DC |
581 | * ENOSPC, we will hold out any changes while we work out |
582 | * what to do. This means that the amount of free space can | |
583 | * change while we do this, so we need to retry if we end up | |
584 | * trying to reserve more space than is available. | |
585 | * | |
586 | * We also use the xfs_mod_incore_sb() interface so that we | |
587 | * don't have to care about whether per cpu counter are | |
588 | * enabled, disabled or even compiled in.... | |
589 | */ | |
590 | retry: | |
3685c2a1 | 591 | spin_lock(&mp->m_sb_lock); |
d4d90b57 | 592 | xfs_icsb_sync_counters_locked(mp, 0); |
1da177e4 LT |
593 | |
594 | /* | |
595 | * If our previous reservation was larger than the current value, | |
596 | * then move any unused blocks back to the free pool. | |
597 | */ | |
dbcabad1 | 598 | fdblks_delta = 0; |
1da177e4 LT |
599 | if (mp->m_resblks > request) { |
600 | lcounter = mp->m_resblks_avail - request; | |
601 | if (lcounter > 0) { /* release unused blocks */ | |
dbcabad1 | 602 | fdblks_delta = lcounter; |
1da177e4 LT |
603 | mp->m_resblks_avail -= lcounter; |
604 | } | |
605 | mp->m_resblks = request; | |
606 | } else { | |
4be536de DC |
607 | __int64_t free; |
608 | ||
609 | free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); | |
dbcabad1 DC |
610 | if (!free) |
611 | goto out; /* ENOSPC and fdblks_delta = 0 */ | |
612 | ||
1da177e4 | 613 | delta = request - mp->m_resblks; |
4be536de | 614 | lcounter = free - delta; |
1da177e4 LT |
615 | if (lcounter < 0) { |
616 | /* We can't satisfy the request, just get what we can */ | |
4be536de DC |
617 | mp->m_resblks += free; |
618 | mp->m_resblks_avail += free; | |
dbcabad1 | 619 | fdblks_delta = -free; |
1da177e4 | 620 | } else { |
dbcabad1 | 621 | fdblks_delta = -delta; |
1da177e4 LT |
622 | mp->m_resblks = request; |
623 | mp->m_resblks_avail += delta; | |
624 | } | |
625 | } | |
dbcabad1 | 626 | out: |
84e1e99f DC |
627 | if (outval) { |
628 | outval->resblks = mp->m_resblks; | |
629 | outval->resblks_avail = mp->m_resblks_avail; | |
630 | } | |
3685c2a1 | 631 | spin_unlock(&mp->m_sb_lock); |
dbcabad1 DC |
632 | |
633 | if (fdblks_delta) { | |
634 | /* | |
635 | * If we are putting blocks back here, m_resblks_avail is | |
9da096fd | 636 | * already at its max so this will put it in the free pool. |
dbcabad1 DC |
637 | * |
638 | * If we need space, we'll either succeed in getting it | |
639 | * from the free block count or we'll get an enospc. If | |
640 | * we get a ENOSPC, it means things changed while we were | |
641 | * calculating fdblks_delta and so we should try again to | |
642 | * see if there is anything left to reserve. | |
643 | * | |
644 | * Don't set the reserved flag here - we don't want to reserve | |
645 | * the extra reserve blocks from the reserve..... | |
646 | */ | |
647 | int error; | |
96540c78 CH |
648 | error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, |
649 | fdblks_delta, 0); | |
dbcabad1 DC |
650 | if (error == ENOSPC) |
651 | goto retry; | |
652 | } | |
014c2544 | 653 | return 0; |
1da177e4 LT |
654 | } |
655 | ||
1a387d3b DC |
656 | /* |
657 | * Dump a transaction into the log that contains no real change. This is needed | |
658 | * to be able to make the log dirty or stamp the current tail LSN into the log | |
659 | * during the covering operation. | |
660 | * | |
661 | * We cannot use an inode here for this - that will push dirty state back up | |
662 | * into the VFS and then periodic inode flushing will prevent log covering from | |
c58efdb4 DC |
663 | * making progress. Hence we log a field in the superblock instead and use a |
664 | * synchronous transaction to ensure the superblock is immediately unpinned | |
665 | * and can be written back. | |
1a387d3b | 666 | */ |
c4be0c1d | 667 | int |
421ad134 | 668 | xfs_fs_log_dummy( |
c58efdb4 | 669 | xfs_mount_t *mp) |
e13a73f0 | 670 | { |
421ad134 | 671 | xfs_trans_t *tp; |
c4be0c1d | 672 | int error; |
e13a73f0 | 673 | |
80641dc6 | 674 | tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1, KM_SLEEP); |
1a387d3b DC |
675 | error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0, |
676 | XFS_DEFAULT_LOG_COUNT); | |
c4be0c1d | 677 | if (error) { |
e13a73f0 | 678 | xfs_trans_cancel(tp, 0); |
c4be0c1d | 679 | return error; |
e13a73f0 CH |
680 | } |
681 | ||
1a387d3b DC |
682 | /* log the UUID because it is an unchanging field */ |
683 | xfs_mod_sb(tp, XFS_SB_UUID); | |
c58efdb4 | 684 | xfs_trans_set_sync(tp); |
1a387d3b | 685 | return xfs_trans_commit(tp, 0); |
e13a73f0 CH |
686 | } |
687 | ||
1da177e4 LT |
688 | int |
689 | xfs_fs_goingdown( | |
690 | xfs_mount_t *mp, | |
691 | __uint32_t inflags) | |
692 | { | |
693 | switch (inflags) { | |
694 | case XFS_FSOP_GOING_FLAGS_DEFAULT: { | |
b267ce99 | 695 | struct super_block *sb = freeze_bdev(mp->m_super->s_bdev); |
1da177e4 | 696 | |
f33c6797 | 697 | if (sb && !IS_ERR(sb)) { |
7d04a335 | 698 | xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); |
1da177e4 LT |
699 | thaw_bdev(sb->s_bdev, sb); |
700 | } | |
189f4bf2 | 701 | |
1da177e4 LT |
702 | break; |
703 | } | |
704 | case XFS_FSOP_GOING_FLAGS_LOGFLUSH: | |
7d04a335 | 705 | xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); |
1da177e4 LT |
706 | break; |
707 | case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH: | |
7d04a335 NS |
708 | xfs_force_shutdown(mp, |
709 | SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR); | |
1da177e4 LT |
710 | break; |
711 | default: | |
712 | return XFS_ERROR(EINVAL); | |
713 | } | |
714 | ||
715 | return 0; | |
716 | } | |
2af51f3a DC |
717 | |
718 | /* | |
719 | * Force a shutdown of the filesystem instantly while keeping the filesystem | |
720 | * consistent. We don't do an unmount here; just shutdown the shop, make sure | |
721 | * that absolutely nothing persistent happens to this filesystem after this | |
722 | * point. | |
723 | */ | |
724 | void | |
725 | xfs_do_force_shutdown( | |
726 | xfs_mount_t *mp, | |
727 | int flags, | |
728 | char *fname, | |
729 | int lnnum) | |
730 | { | |
731 | int logerror; | |
732 | ||
733 | logerror = flags & SHUTDOWN_LOG_IO_ERROR; | |
734 | ||
735 | if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { | |
736 | xfs_notice(mp, | |
737 | "%s(0x%x) called from line %d of file %s. Return address = 0x%p", | |
738 | __func__, flags, lnnum, fname, __return_address); | |
739 | } | |
740 | /* | |
741 | * No need to duplicate efforts. | |
742 | */ | |
743 | if (XFS_FORCED_SHUTDOWN(mp) && !logerror) | |
744 | return; | |
745 | ||
746 | /* | |
747 | * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't | |
748 | * queue up anybody new on the log reservations, and wakes up | |
749 | * everybody who's sleeping on log reservations to tell them | |
750 | * the bad news. | |
751 | */ | |
752 | if (xfs_log_force_umount(mp, logerror)) | |
753 | return; | |
754 | ||
755 | if (flags & SHUTDOWN_CORRUPT_INCORE) { | |
756 | xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT, | |
757 | "Corruption of in-memory data detected. Shutting down filesystem"); | |
758 | if (XFS_ERRLEVEL_HIGH <= xfs_error_level) | |
759 | xfs_stack_trace(); | |
760 | } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { | |
761 | if (logerror) { | |
762 | xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR, | |
763 | "Log I/O Error Detected. Shutting down filesystem"); | |
764 | } else if (flags & SHUTDOWN_DEVICE_REQ) { | |
765 | xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR, | |
766 | "All device paths lost. Shutting down filesystem"); | |
767 | } else if (!(flags & SHUTDOWN_REMOTE_REQ)) { | |
768 | xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR, | |
769 | "I/O Error Detected. Shutting down filesystem"); | |
770 | } | |
771 | } | |
772 | if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { | |
773 | xfs_alert(mp, | |
774 | "Please umount the filesystem and rectify the problem(s)"); | |
775 | } | |
776 | } |