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" |
a844f451 | 21 | #include "xfs_bit.h" |
1da177e4 LT |
22 | #include "xfs_inum.h" |
23 | #include "xfs_log.h" | |
24 | #include "xfs_trans.h" | |
25 | #include "xfs_sb.h" | |
a844f451 | 26 | #include "xfs_ag.h" |
1da177e4 | 27 | #include "xfs_mount.h" |
1da177e4 | 28 | #include "xfs_bmap_btree.h" |
a844f451 | 29 | #include "xfs_alloc_btree.h" |
1da177e4 | 30 | #include "xfs_ialloc_btree.h" |
a844f451 NS |
31 | #include "xfs_dinode.h" |
32 | #include "xfs_inode.h" | |
33 | #include "xfs_inode_item.h" | |
1da177e4 LT |
34 | #include "xfs_btree.h" |
35 | #include "xfs_error.h" | |
36 | #include "xfs_alloc.h" | |
37 | #include "xfs_ialloc.h" | |
38 | #include "xfs_fsops.h" | |
39 | #include "xfs_itable.h" | |
1da177e4 LT |
40 | #include "xfs_trans_space.h" |
41 | #include "xfs_rtalloc.h" | |
a844f451 | 42 | #include "xfs_rw.h" |
2a82b8be | 43 | #include "xfs_filestream.h" |
0b1b213f | 44 | #include "xfs_trace.h" |
1da177e4 LT |
45 | |
46 | /* | |
47 | * File system operations | |
48 | */ | |
49 | ||
50 | int | |
51 | xfs_fs_geometry( | |
52 | xfs_mount_t *mp, | |
53 | xfs_fsop_geom_t *geo, | |
54 | int new_version) | |
55 | { | |
c4d0c3b0 DR |
56 | |
57 | memset(geo, 0, sizeof(*geo)); | |
58 | ||
1da177e4 LT |
59 | geo->blocksize = mp->m_sb.sb_blocksize; |
60 | geo->rtextsize = mp->m_sb.sb_rextsize; | |
61 | geo->agblocks = mp->m_sb.sb_agblocks; | |
62 | geo->agcount = mp->m_sb.sb_agcount; | |
63 | geo->logblocks = mp->m_sb.sb_logblocks; | |
64 | geo->sectsize = mp->m_sb.sb_sectsize; | |
65 | geo->inodesize = mp->m_sb.sb_inodesize; | |
66 | geo->imaxpct = mp->m_sb.sb_imax_pct; | |
67 | geo->datablocks = mp->m_sb.sb_dblocks; | |
68 | geo->rtblocks = mp->m_sb.sb_rblocks; | |
69 | geo->rtextents = mp->m_sb.sb_rextents; | |
70 | geo->logstart = mp->m_sb.sb_logstart; | |
71 | ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid)); | |
72 | memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid)); | |
73 | if (new_version >= 2) { | |
74 | geo->sunit = mp->m_sb.sb_unit; | |
75 | geo->swidth = mp->m_sb.sb_width; | |
76 | } | |
77 | if (new_version >= 3) { | |
78 | geo->version = XFS_FSOP_GEOM_VERSION; | |
79 | geo->flags = | |
62118709 | 80 | (xfs_sb_version_hasattr(&mp->m_sb) ? |
1da177e4 | 81 | XFS_FSOP_GEOM_FLAGS_ATTR : 0) | |
62118709 | 82 | (xfs_sb_version_hasnlink(&mp->m_sb) ? |
1da177e4 | 83 | XFS_FSOP_GEOM_FLAGS_NLINK : 0) | |
62118709 | 84 | (xfs_sb_version_hasquota(&mp->m_sb) ? |
1da177e4 | 85 | XFS_FSOP_GEOM_FLAGS_QUOTA : 0) | |
62118709 | 86 | (xfs_sb_version_hasalign(&mp->m_sb) ? |
1da177e4 | 87 | XFS_FSOP_GEOM_FLAGS_IALIGN : 0) | |
62118709 | 88 | (xfs_sb_version_hasdalign(&mp->m_sb) ? |
1da177e4 | 89 | XFS_FSOP_GEOM_FLAGS_DALIGN : 0) | |
62118709 | 90 | (xfs_sb_version_hasshared(&mp->m_sb) ? |
1da177e4 | 91 | XFS_FSOP_GEOM_FLAGS_SHARED : 0) | |
62118709 | 92 | (xfs_sb_version_hasextflgbit(&mp->m_sb) ? |
1da177e4 | 93 | XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) | |
62118709 | 94 | (xfs_sb_version_hasdirv2(&mp->m_sb) ? |
1da177e4 | 95 | XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) | |
62118709 | 96 | (xfs_sb_version_hassector(&mp->m_sb) ? |
d8cc890d | 97 | XFS_FSOP_GEOM_FLAGS_SECTOR : 0) | |
189f4bf2 BN |
98 | (xfs_sb_version_hasasciici(&mp->m_sb) ? |
99 | XFS_FSOP_GEOM_FLAGS_DIRV2CI : 0) | | |
92821e2b DC |
100 | (xfs_sb_version_haslazysbcount(&mp->m_sb) ? |
101 | XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) | | |
62118709 | 102 | (xfs_sb_version_hasattr2(&mp->m_sb) ? |
d8cc890d | 103 | XFS_FSOP_GEOM_FLAGS_ATTR2 : 0); |
62118709 | 104 | geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ? |
1da177e4 LT |
105 | mp->m_sb.sb_logsectsize : BBSIZE; |
106 | geo->rtsectsize = mp->m_sb.sb_blocksize; | |
107 | geo->dirblocksize = mp->m_dirblksize; | |
108 | } | |
109 | if (new_version >= 4) { | |
110 | geo->flags |= | |
62118709 | 111 | (xfs_sb_version_haslogv2(&mp->m_sb) ? |
1da177e4 LT |
112 | XFS_FSOP_GEOM_FLAGS_LOGV2 : 0); |
113 | geo->logsunit = mp->m_sb.sb_logsunit; | |
114 | } | |
115 | return 0; | |
116 | } | |
117 | ||
118 | static int | |
119 | xfs_growfs_data_private( | |
120 | xfs_mount_t *mp, /* mount point for filesystem */ | |
121 | xfs_growfs_data_t *in) /* growfs data input struct */ | |
122 | { | |
123 | xfs_agf_t *agf; | |
124 | xfs_agi_t *agi; | |
125 | xfs_agnumber_t agno; | |
126 | xfs_extlen_t agsize; | |
127 | xfs_extlen_t tmpsize; | |
128 | xfs_alloc_rec_t *arec; | |
7cc95a82 | 129 | struct xfs_btree_block *block; |
1da177e4 LT |
130 | xfs_buf_t *bp; |
131 | int bucket; | |
132 | int dpct; | |
133 | int error; | |
134 | xfs_agnumber_t nagcount; | |
135 | xfs_agnumber_t nagimax = 0; | |
136 | xfs_rfsblock_t nb, nb_mod; | |
137 | xfs_rfsblock_t new; | |
138 | xfs_rfsblock_t nfree; | |
139 | xfs_agnumber_t oagcount; | |
140 | int pct; | |
1da177e4 LT |
141 | xfs_trans_t *tp; |
142 | ||
143 | nb = in->newblocks; | |
144 | pct = in->imaxpct; | |
145 | if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100) | |
146 | return XFS_ERROR(EINVAL); | |
4cc929ee NS |
147 | if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb))) |
148 | return error; | |
1da177e4 | 149 | dpct = pct - mp->m_sb.sb_imax_pct; |
1922c949 DC |
150 | bp = xfs_buf_read_uncached(mp, mp->m_ddev_targp, |
151 | XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1), | |
152 | BBTOB(XFS_FSS_TO_BB(mp, 1)), 0); | |
153 | if (!bp) | |
154 | return EIO; | |
1da177e4 LT |
155 | xfs_buf_relse(bp); |
156 | ||
157 | new = nb; /* use new as a temporary here */ | |
158 | nb_mod = do_div(new, mp->m_sb.sb_agblocks); | |
159 | nagcount = new + (nb_mod != 0); | |
160 | if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) { | |
161 | nagcount--; | |
e6da7c9f | 162 | nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks; |
1da177e4 LT |
163 | if (nb < mp->m_sb.sb_dblocks) |
164 | return XFS_ERROR(EINVAL); | |
165 | } | |
166 | new = nb - mp->m_sb.sb_dblocks; | |
167 | oagcount = mp->m_sb.sb_agcount; | |
0cc6eee1 | 168 | |
1c1c6ebc DC |
169 | /* allocate the new per-ag structures */ |
170 | if (nagcount > oagcount) { | |
171 | error = xfs_initialize_perag(mp, nagcount, &nagimax); | |
172 | if (error) | |
173 | return error; | |
1da177e4 | 174 | } |
1c1c6ebc | 175 | |
1da177e4 | 176 | tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS); |
84e1e99f | 177 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
178 | if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp), |
179 | XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) { | |
180 | xfs_trans_cancel(tp, 0); | |
181 | return error; | |
182 | } | |
183 | ||
1c1c6ebc DC |
184 | /* |
185 | * Write new AG headers to disk. Non-transactional, but written | |
186 | * synchronously so they are completed prior to the growfs transaction | |
187 | * being logged. | |
188 | */ | |
1da177e4 LT |
189 | nfree = 0; |
190 | for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) { | |
191 | /* | |
192 | * AG freelist header block | |
193 | */ | |
194 | bp = xfs_buf_get(mp->m_ddev_targp, | |
6ad112bf CH |
195 | XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), |
196 | XFS_FSS_TO_BB(mp, 1), XBF_LOCK | XBF_MAPPED); | |
1da177e4 LT |
197 | agf = XFS_BUF_TO_AGF(bp); |
198 | memset(agf, 0, mp->m_sb.sb_sectsize); | |
16259e7d CH |
199 | agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC); |
200 | agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION); | |
201 | agf->agf_seqno = cpu_to_be32(agno); | |
1da177e4 LT |
202 | if (agno == nagcount - 1) |
203 | agsize = | |
204 | nb - | |
205 | (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks); | |
206 | else | |
207 | agsize = mp->m_sb.sb_agblocks; | |
16259e7d CH |
208 | agf->agf_length = cpu_to_be32(agsize); |
209 | agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp)); | |
210 | agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp)); | |
211 | agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1); | |
212 | agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1); | |
1da177e4 | 213 | agf->agf_flfirst = 0; |
16259e7d | 214 | agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1); |
1da177e4 LT |
215 | agf->agf_flcount = 0; |
216 | tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp); | |
16259e7d CH |
217 | agf->agf_freeblks = cpu_to_be32(tmpsize); |
218 | agf->agf_longest = cpu_to_be32(tmpsize); | |
1da177e4 LT |
219 | error = xfs_bwrite(mp, bp); |
220 | if (error) { | |
221 | goto error0; | |
222 | } | |
223 | /* | |
224 | * AG inode header block | |
225 | */ | |
226 | bp = xfs_buf_get(mp->m_ddev_targp, | |
6ad112bf CH |
227 | XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), |
228 | XFS_FSS_TO_BB(mp, 1), XBF_LOCK | XBF_MAPPED); | |
1da177e4 LT |
229 | agi = XFS_BUF_TO_AGI(bp); |
230 | memset(agi, 0, mp->m_sb.sb_sectsize); | |
16259e7d CH |
231 | agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC); |
232 | agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION); | |
233 | agi->agi_seqno = cpu_to_be32(agno); | |
234 | agi->agi_length = cpu_to_be32(agsize); | |
1da177e4 | 235 | agi->agi_count = 0; |
16259e7d CH |
236 | agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp)); |
237 | agi->agi_level = cpu_to_be32(1); | |
1da177e4 | 238 | agi->agi_freecount = 0; |
16259e7d CH |
239 | agi->agi_newino = cpu_to_be32(NULLAGINO); |
240 | agi->agi_dirino = cpu_to_be32(NULLAGINO); | |
1da177e4 | 241 | for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) |
16259e7d | 242 | agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); |
1da177e4 LT |
243 | error = xfs_bwrite(mp, bp); |
244 | if (error) { | |
245 | goto error0; | |
246 | } | |
247 | /* | |
248 | * BNO btree root block | |
249 | */ | |
250 | bp = xfs_buf_get(mp->m_ddev_targp, | |
6ad112bf CH |
251 | XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), |
252 | BTOBB(mp->m_sb.sb_blocksize), | |
253 | XBF_LOCK | XBF_MAPPED); | |
7cc95a82 | 254 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 | 255 | memset(block, 0, mp->m_sb.sb_blocksize); |
16259e7d | 256 | block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC); |
1da177e4 | 257 | block->bb_level = 0; |
16259e7d | 258 | block->bb_numrecs = cpu_to_be16(1); |
7cc95a82 CH |
259 | block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK); |
260 | block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK); | |
136341b4 | 261 | arec = XFS_ALLOC_REC_ADDR(mp, block, 1); |
16259e7d CH |
262 | arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); |
263 | arec->ar_blockcount = cpu_to_be32( | |
264 | agsize - be32_to_cpu(arec->ar_startblock)); | |
1da177e4 LT |
265 | error = xfs_bwrite(mp, bp); |
266 | if (error) { | |
267 | goto error0; | |
268 | } | |
269 | /* | |
270 | * CNT btree root block | |
271 | */ | |
272 | bp = xfs_buf_get(mp->m_ddev_targp, | |
6ad112bf CH |
273 | XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)), |
274 | BTOBB(mp->m_sb.sb_blocksize), | |
275 | XBF_LOCK | XBF_MAPPED); | |
7cc95a82 | 276 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 | 277 | memset(block, 0, mp->m_sb.sb_blocksize); |
16259e7d | 278 | block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC); |
1da177e4 | 279 | block->bb_level = 0; |
16259e7d | 280 | block->bb_numrecs = cpu_to_be16(1); |
7cc95a82 CH |
281 | block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK); |
282 | block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK); | |
136341b4 | 283 | arec = XFS_ALLOC_REC_ADDR(mp, block, 1); |
16259e7d CH |
284 | arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); |
285 | arec->ar_blockcount = cpu_to_be32( | |
286 | agsize - be32_to_cpu(arec->ar_startblock)); | |
287 | nfree += be32_to_cpu(arec->ar_blockcount); | |
1da177e4 LT |
288 | error = xfs_bwrite(mp, bp); |
289 | if (error) { | |
290 | goto error0; | |
291 | } | |
292 | /* | |
293 | * INO btree root block | |
294 | */ | |
295 | bp = xfs_buf_get(mp->m_ddev_targp, | |
6ad112bf CH |
296 | XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), |
297 | BTOBB(mp->m_sb.sb_blocksize), | |
298 | XBF_LOCK | XBF_MAPPED); | |
7cc95a82 | 299 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 | 300 | memset(block, 0, mp->m_sb.sb_blocksize); |
16259e7d | 301 | block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC); |
1da177e4 LT |
302 | block->bb_level = 0; |
303 | block->bb_numrecs = 0; | |
7cc95a82 CH |
304 | block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK); |
305 | block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK); | |
1da177e4 LT |
306 | error = xfs_bwrite(mp, bp); |
307 | if (error) { | |
308 | goto error0; | |
309 | } | |
310 | } | |
311 | xfs_trans_agblocks_delta(tp, nfree); | |
312 | /* | |
313 | * There are new blocks in the old last a.g. | |
314 | */ | |
315 | if (new) { | |
316 | /* | |
317 | * Change the agi length. | |
318 | */ | |
319 | error = xfs_ialloc_read_agi(mp, tp, agno, &bp); | |
320 | if (error) { | |
321 | goto error0; | |
322 | } | |
323 | ASSERT(bp); | |
324 | agi = XFS_BUF_TO_AGI(bp); | |
413d57c9 | 325 | be32_add_cpu(&agi->agi_length, new); |
1da177e4 | 326 | ASSERT(nagcount == oagcount || |
16259e7d | 327 | be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks); |
1da177e4 LT |
328 | xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH); |
329 | /* | |
330 | * Change agf length. | |
331 | */ | |
332 | error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp); | |
333 | if (error) { | |
334 | goto error0; | |
335 | } | |
336 | ASSERT(bp); | |
337 | agf = XFS_BUF_TO_AGF(bp); | |
413d57c9 | 338 | be32_add_cpu(&agf->agf_length, new); |
16259e7d CH |
339 | ASSERT(be32_to_cpu(agf->agf_length) == |
340 | be32_to_cpu(agi->agi_length)); | |
0b1b213f | 341 | |
0164af51 | 342 | xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH); |
1da177e4 LT |
343 | /* |
344 | * Free the new space. | |
345 | */ | |
346 | error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno, | |
16259e7d | 347 | be32_to_cpu(agf->agf_length) - new), new); |
1da177e4 LT |
348 | if (error) { |
349 | goto error0; | |
350 | } | |
351 | } | |
1c1c6ebc DC |
352 | |
353 | /* | |
354 | * Update changed superblock fields transactionally. These are not | |
355 | * seen by the rest of the world until the transaction commit applies | |
356 | * them atomically to the superblock. | |
357 | */ | |
1da177e4 LT |
358 | if (nagcount > oagcount) |
359 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount); | |
360 | if (nb > mp->m_sb.sb_dblocks) | |
361 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, | |
362 | nb - mp->m_sb.sb_dblocks); | |
363 | if (nfree) | |
364 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree); | |
365 | if (dpct) | |
366 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct); | |
1c72bf90 | 367 | error = xfs_trans_commit(tp, 0); |
1c1c6ebc | 368 | if (error) |
1da177e4 | 369 | return error; |
1c1c6ebc | 370 | |
1da177e4 LT |
371 | /* New allocation groups fully initialized, so update mount struct */ |
372 | if (nagimax) | |
373 | mp->m_maxagi = nagimax; | |
374 | if (mp->m_sb.sb_imax_pct) { | |
375 | __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct; | |
376 | do_div(icount, 100); | |
377 | mp->m_maxicount = icount << mp->m_sb.sb_inopblog; | |
378 | } else | |
379 | mp->m_maxicount = 0; | |
055388a3 | 380 | xfs_set_low_space_thresholds(mp); |
1c1c6ebc DC |
381 | |
382 | /* update secondary superblocks. */ | |
1da177e4 LT |
383 | for (agno = 1; agno < nagcount; agno++) { |
384 | error = xfs_read_buf(mp, mp->m_ddev_targp, | |
385 | XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
386 | XFS_FSS_TO_BB(mp, 1), 0, &bp); | |
387 | if (error) { | |
53487786 DC |
388 | xfs_warn(mp, |
389 | "error %d reading secondary superblock for ag %d", | |
1da177e4 LT |
390 | error, agno); |
391 | break; | |
392 | } | |
2bdf7cd0 | 393 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS); |
1da177e4 LT |
394 | /* |
395 | * If we get an error writing out the alternate superblocks, | |
396 | * just issue a warning and continue. The real work is | |
397 | * already done and committed. | |
398 | */ | |
399 | if (!(error = xfs_bwrite(mp, bp))) { | |
400 | continue; | |
401 | } else { | |
53487786 | 402 | xfs_warn(mp, |
1da177e4 LT |
403 | "write error %d updating secondary superblock for ag %d", |
404 | error, agno); | |
405 | break; /* no point in continuing */ | |
406 | } | |
407 | } | |
408 | return 0; | |
409 | ||
410 | error0: | |
411 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); | |
412 | return error; | |
413 | } | |
414 | ||
415 | static int | |
416 | xfs_growfs_log_private( | |
417 | xfs_mount_t *mp, /* mount point for filesystem */ | |
418 | xfs_growfs_log_t *in) /* growfs log input struct */ | |
419 | { | |
420 | xfs_extlen_t nb; | |
421 | ||
422 | nb = in->newblocks; | |
423 | if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES)) | |
424 | return XFS_ERROR(EINVAL); | |
425 | if (nb == mp->m_sb.sb_logblocks && | |
426 | in->isint == (mp->m_sb.sb_logstart != 0)) | |
427 | return XFS_ERROR(EINVAL); | |
428 | /* | |
429 | * Moving the log is hard, need new interfaces to sync | |
430 | * the log first, hold off all activity while moving it. | |
431 | * Can have shorter or longer log in the same space, | |
432 | * or transform internal to external log or vice versa. | |
433 | */ | |
434 | return XFS_ERROR(ENOSYS); | |
435 | } | |
436 | ||
437 | /* | |
438 | * protected versions of growfs function acquire and release locks on the mount | |
439 | * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG, | |
440 | * XFS_IOC_FSGROWFSRT | |
441 | */ | |
442 | ||
443 | ||
444 | int | |
445 | xfs_growfs_data( | |
446 | xfs_mount_t *mp, | |
447 | xfs_growfs_data_t *in) | |
448 | { | |
449 | int error; | |
743bb465 | 450 | |
451 | if (!capable(CAP_SYS_ADMIN)) | |
452 | return XFS_ERROR(EPERM); | |
cc92e7ac | 453 | if (!mutex_trylock(&mp->m_growlock)) |
1da177e4 LT |
454 | return XFS_ERROR(EWOULDBLOCK); |
455 | error = xfs_growfs_data_private(mp, in); | |
cc92e7ac | 456 | mutex_unlock(&mp->m_growlock); |
1da177e4 LT |
457 | return error; |
458 | } | |
459 | ||
460 | int | |
461 | xfs_growfs_log( | |
462 | xfs_mount_t *mp, | |
463 | xfs_growfs_log_t *in) | |
464 | { | |
465 | int error; | |
743bb465 | 466 | |
467 | if (!capable(CAP_SYS_ADMIN)) | |
468 | return XFS_ERROR(EPERM); | |
cc92e7ac | 469 | if (!mutex_trylock(&mp->m_growlock)) |
1da177e4 LT |
470 | return XFS_ERROR(EWOULDBLOCK); |
471 | error = xfs_growfs_log_private(mp, in); | |
cc92e7ac | 472 | mutex_unlock(&mp->m_growlock); |
1da177e4 LT |
473 | return error; |
474 | } | |
475 | ||
476 | /* | |
477 | * exported through ioctl XFS_IOC_FSCOUNTS | |
478 | */ | |
479 | ||
480 | int | |
481 | xfs_fs_counts( | |
482 | xfs_mount_t *mp, | |
483 | xfs_fsop_counts_t *cnt) | |
484 | { | |
d4d90b57 | 485 | xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); |
3685c2a1 | 486 | spin_lock(&mp->m_sb_lock); |
4be536de | 487 | cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); |
1da177e4 LT |
488 | cnt->freertx = mp->m_sb.sb_frextents; |
489 | cnt->freeino = mp->m_sb.sb_ifree; | |
490 | cnt->allocino = mp->m_sb.sb_icount; | |
3685c2a1 | 491 | spin_unlock(&mp->m_sb_lock); |
1da177e4 LT |
492 | return 0; |
493 | } | |
494 | ||
495 | /* | |
496 | * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS | |
497 | * | |
498 | * xfs_reserve_blocks is called to set m_resblks | |
499 | * in the in-core mount table. The number of unused reserved blocks | |
c41564b5 | 500 | * is kept in m_resblks_avail. |
1da177e4 LT |
501 | * |
502 | * Reserve the requested number of blocks if available. Otherwise return | |
503 | * as many as possible to satisfy the request. The actual number | |
504 | * reserved are returned in outval | |
505 | * | |
506 | * A null inval pointer indicates that only the current reserved blocks | |
507 | * available should be returned no settings are changed. | |
508 | */ | |
509 | ||
510 | int | |
511 | xfs_reserve_blocks( | |
512 | xfs_mount_t *mp, | |
513 | __uint64_t *inval, | |
514 | xfs_fsop_resblks_t *outval) | |
515 | { | |
dbcabad1 | 516 | __int64_t lcounter, delta, fdblks_delta; |
1da177e4 | 517 | __uint64_t request; |
1da177e4 LT |
518 | |
519 | /* If inval is null, report current values and return */ | |
1da177e4 | 520 | if (inval == (__uint64_t *)NULL) { |
84e1e99f DC |
521 | if (!outval) |
522 | return EINVAL; | |
1da177e4 LT |
523 | outval->resblks = mp->m_resblks; |
524 | outval->resblks_avail = mp->m_resblks_avail; | |
014c2544 | 525 | return 0; |
1da177e4 LT |
526 | } |
527 | ||
528 | request = *inval; | |
dbcabad1 DC |
529 | |
530 | /* | |
531 | * With per-cpu counters, this becomes an interesting | |
532 | * problem. we needto work out if we are freeing or allocation | |
533 | * blocks first, then we can do the modification as necessary. | |
534 | * | |
3685c2a1 | 535 | * We do this under the m_sb_lock so that if we are near |
dbcabad1 DC |
536 | * ENOSPC, we will hold out any changes while we work out |
537 | * what to do. This means that the amount of free space can | |
538 | * change while we do this, so we need to retry if we end up | |
539 | * trying to reserve more space than is available. | |
540 | * | |
541 | * We also use the xfs_mod_incore_sb() interface so that we | |
542 | * don't have to care about whether per cpu counter are | |
543 | * enabled, disabled or even compiled in.... | |
544 | */ | |
545 | retry: | |
3685c2a1 | 546 | spin_lock(&mp->m_sb_lock); |
d4d90b57 | 547 | xfs_icsb_sync_counters_locked(mp, 0); |
1da177e4 LT |
548 | |
549 | /* | |
550 | * If our previous reservation was larger than the current value, | |
551 | * then move any unused blocks back to the free pool. | |
552 | */ | |
dbcabad1 | 553 | fdblks_delta = 0; |
1da177e4 LT |
554 | if (mp->m_resblks > request) { |
555 | lcounter = mp->m_resblks_avail - request; | |
556 | if (lcounter > 0) { /* release unused blocks */ | |
dbcabad1 | 557 | fdblks_delta = lcounter; |
1da177e4 LT |
558 | mp->m_resblks_avail -= lcounter; |
559 | } | |
560 | mp->m_resblks = request; | |
561 | } else { | |
4be536de DC |
562 | __int64_t free; |
563 | ||
564 | free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); | |
dbcabad1 DC |
565 | if (!free) |
566 | goto out; /* ENOSPC and fdblks_delta = 0 */ | |
567 | ||
1da177e4 | 568 | delta = request - mp->m_resblks; |
4be536de | 569 | lcounter = free - delta; |
1da177e4 LT |
570 | if (lcounter < 0) { |
571 | /* We can't satisfy the request, just get what we can */ | |
4be536de DC |
572 | mp->m_resblks += free; |
573 | mp->m_resblks_avail += free; | |
dbcabad1 | 574 | fdblks_delta = -free; |
1da177e4 | 575 | } else { |
dbcabad1 | 576 | fdblks_delta = -delta; |
1da177e4 LT |
577 | mp->m_resblks = request; |
578 | mp->m_resblks_avail += delta; | |
579 | } | |
580 | } | |
dbcabad1 | 581 | out: |
84e1e99f DC |
582 | if (outval) { |
583 | outval->resblks = mp->m_resblks; | |
584 | outval->resblks_avail = mp->m_resblks_avail; | |
585 | } | |
3685c2a1 | 586 | spin_unlock(&mp->m_sb_lock); |
dbcabad1 DC |
587 | |
588 | if (fdblks_delta) { | |
589 | /* | |
590 | * If we are putting blocks back here, m_resblks_avail is | |
9da096fd | 591 | * already at its max so this will put it in the free pool. |
dbcabad1 DC |
592 | * |
593 | * If we need space, we'll either succeed in getting it | |
594 | * from the free block count or we'll get an enospc. If | |
595 | * we get a ENOSPC, it means things changed while we were | |
596 | * calculating fdblks_delta and so we should try again to | |
597 | * see if there is anything left to reserve. | |
598 | * | |
599 | * Don't set the reserved flag here - we don't want to reserve | |
600 | * the extra reserve blocks from the reserve..... | |
601 | */ | |
602 | int error; | |
96540c78 CH |
603 | error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, |
604 | fdblks_delta, 0); | |
dbcabad1 DC |
605 | if (error == ENOSPC) |
606 | goto retry; | |
607 | } | |
014c2544 | 608 | return 0; |
1da177e4 LT |
609 | } |
610 | ||
1a387d3b DC |
611 | /* |
612 | * Dump a transaction into the log that contains no real change. This is needed | |
613 | * to be able to make the log dirty or stamp the current tail LSN into the log | |
614 | * during the covering operation. | |
615 | * | |
616 | * We cannot use an inode here for this - that will push dirty state back up | |
617 | * into the VFS and then periodic inode flushing will prevent log covering from | |
c58efdb4 DC |
618 | * making progress. Hence we log a field in the superblock instead and use a |
619 | * synchronous transaction to ensure the superblock is immediately unpinned | |
620 | * and can be written back. | |
1a387d3b | 621 | */ |
c4be0c1d | 622 | int |
421ad134 | 623 | xfs_fs_log_dummy( |
c58efdb4 | 624 | xfs_mount_t *mp) |
e13a73f0 | 625 | { |
421ad134 | 626 | xfs_trans_t *tp; |
c4be0c1d | 627 | int error; |
e13a73f0 | 628 | |
b2ce3974 | 629 | tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1, KM_SLEEP); |
1a387d3b DC |
630 | error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0, |
631 | XFS_DEFAULT_LOG_COUNT); | |
c4be0c1d | 632 | if (error) { |
e13a73f0 | 633 | xfs_trans_cancel(tp, 0); |
c4be0c1d | 634 | return error; |
e13a73f0 CH |
635 | } |
636 | ||
1a387d3b DC |
637 | /* log the UUID because it is an unchanging field */ |
638 | xfs_mod_sb(tp, XFS_SB_UUID); | |
c58efdb4 | 639 | xfs_trans_set_sync(tp); |
1a387d3b | 640 | return xfs_trans_commit(tp, 0); |
e13a73f0 CH |
641 | } |
642 | ||
1da177e4 LT |
643 | int |
644 | xfs_fs_goingdown( | |
645 | xfs_mount_t *mp, | |
646 | __uint32_t inflags) | |
647 | { | |
648 | switch (inflags) { | |
649 | case XFS_FSOP_GOING_FLAGS_DEFAULT: { | |
b267ce99 | 650 | struct super_block *sb = freeze_bdev(mp->m_super->s_bdev); |
1da177e4 | 651 | |
f33c6797 | 652 | if (sb && !IS_ERR(sb)) { |
7d04a335 | 653 | xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); |
1da177e4 LT |
654 | thaw_bdev(sb->s_bdev, sb); |
655 | } | |
189f4bf2 | 656 | |
1da177e4 LT |
657 | break; |
658 | } | |
659 | case XFS_FSOP_GOING_FLAGS_LOGFLUSH: | |
7d04a335 | 660 | xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); |
1da177e4 LT |
661 | break; |
662 | case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH: | |
7d04a335 NS |
663 | xfs_force_shutdown(mp, |
664 | SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR); | |
1da177e4 LT |
665 | break; |
666 | default: | |
667 | return XFS_ERROR(EINVAL); | |
668 | } | |
669 | ||
670 | return 0; | |
671 | } |