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 | { | |
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) ? |
d8cc890d | 100 | XFS_FSOP_GEOM_FLAGS_ATTR2 : 0); |
62118709 | 101 | geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ? |
1da177e4 LT |
102 | mp->m_sb.sb_logsectsize : BBSIZE; |
103 | geo->rtsectsize = mp->m_sb.sb_blocksize; | |
104 | geo->dirblocksize = mp->m_dirblksize; | |
105 | } | |
106 | if (new_version >= 4) { | |
107 | geo->flags |= | |
62118709 | 108 | (xfs_sb_version_haslogv2(&mp->m_sb) ? |
1da177e4 LT |
109 | XFS_FSOP_GEOM_FLAGS_LOGV2 : 0); |
110 | geo->logsunit = mp->m_sb.sb_logsunit; | |
111 | } | |
112 | return 0; | |
113 | } | |
114 | ||
115 | static int | |
116 | xfs_growfs_data_private( | |
117 | xfs_mount_t *mp, /* mount point for filesystem */ | |
118 | xfs_growfs_data_t *in) /* growfs data input struct */ | |
119 | { | |
120 | xfs_agf_t *agf; | |
121 | xfs_agi_t *agi; | |
122 | xfs_agnumber_t agno; | |
123 | xfs_extlen_t agsize; | |
124 | xfs_extlen_t tmpsize; | |
125 | xfs_alloc_rec_t *arec; | |
7cc95a82 | 126 | struct xfs_btree_block *block; |
1da177e4 LT |
127 | xfs_buf_t *bp; |
128 | int bucket; | |
129 | int dpct; | |
130 | int error; | |
131 | xfs_agnumber_t nagcount; | |
132 | xfs_agnumber_t nagimax = 0; | |
133 | xfs_rfsblock_t nb, nb_mod; | |
134 | xfs_rfsblock_t new; | |
135 | xfs_rfsblock_t nfree; | |
136 | xfs_agnumber_t oagcount; | |
137 | int pct; | |
1da177e4 LT |
138 | xfs_trans_t *tp; |
139 | ||
140 | nb = in->newblocks; | |
141 | pct = in->imaxpct; | |
142 | if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100) | |
143 | return XFS_ERROR(EINVAL); | |
4cc929ee NS |
144 | if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb))) |
145 | return error; | |
1da177e4 | 146 | dpct = pct - mp->m_sb.sb_imax_pct; |
1922c949 DC |
147 | bp = xfs_buf_read_uncached(mp, mp->m_ddev_targp, |
148 | XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1), | |
149 | BBTOB(XFS_FSS_TO_BB(mp, 1)), 0); | |
150 | if (!bp) | |
151 | return EIO; | |
1da177e4 LT |
152 | xfs_buf_relse(bp); |
153 | ||
154 | new = nb; /* use new as a temporary here */ | |
155 | nb_mod = do_div(new, mp->m_sb.sb_agblocks); | |
156 | nagcount = new + (nb_mod != 0); | |
157 | if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) { | |
158 | nagcount--; | |
e6da7c9f | 159 | nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks; |
1da177e4 LT |
160 | if (nb < mp->m_sb.sb_dblocks) |
161 | return XFS_ERROR(EINVAL); | |
162 | } | |
163 | new = nb - mp->m_sb.sb_dblocks; | |
164 | oagcount = mp->m_sb.sb_agcount; | |
0cc6eee1 | 165 | |
1c1c6ebc DC |
166 | /* allocate the new per-ag structures */ |
167 | if (nagcount > oagcount) { | |
168 | error = xfs_initialize_perag(mp, nagcount, &nagimax); | |
169 | if (error) | |
170 | return error; | |
1da177e4 | 171 | } |
1c1c6ebc | 172 | |
1da177e4 | 173 | tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS); |
84e1e99f | 174 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
175 | if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp), |
176 | XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) { | |
177 | xfs_trans_cancel(tp, 0); | |
178 | return error; | |
179 | } | |
180 | ||
1c1c6ebc DC |
181 | /* |
182 | * Write new AG headers to disk. Non-transactional, but written | |
183 | * synchronously so they are completed prior to the growfs transaction | |
184 | * being logged. | |
185 | */ | |
1da177e4 LT |
186 | nfree = 0; |
187 | for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) { | |
188 | /* | |
189 | * AG freelist header block | |
190 | */ | |
191 | bp = xfs_buf_get(mp->m_ddev_targp, | |
6ad112bf CH |
192 | XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), |
193 | XFS_FSS_TO_BB(mp, 1), XBF_LOCK | XBF_MAPPED); | |
1da177e4 LT |
194 | agf = XFS_BUF_TO_AGF(bp); |
195 | memset(agf, 0, mp->m_sb.sb_sectsize); | |
16259e7d CH |
196 | agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC); |
197 | agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION); | |
198 | agf->agf_seqno = cpu_to_be32(agno); | |
1da177e4 LT |
199 | if (agno == nagcount - 1) |
200 | agsize = | |
201 | nb - | |
202 | (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks); | |
203 | else | |
204 | agsize = mp->m_sb.sb_agblocks; | |
16259e7d CH |
205 | agf->agf_length = cpu_to_be32(agsize); |
206 | agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp)); | |
207 | agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp)); | |
208 | agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1); | |
209 | agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1); | |
1da177e4 | 210 | agf->agf_flfirst = 0; |
16259e7d | 211 | agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1); |
1da177e4 LT |
212 | agf->agf_flcount = 0; |
213 | tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp); | |
16259e7d CH |
214 | agf->agf_freeblks = cpu_to_be32(tmpsize); |
215 | agf->agf_longest = cpu_to_be32(tmpsize); | |
1da177e4 LT |
216 | error = xfs_bwrite(mp, bp); |
217 | if (error) { | |
218 | goto error0; | |
219 | } | |
220 | /* | |
221 | * AG inode header block | |
222 | */ | |
223 | bp = xfs_buf_get(mp->m_ddev_targp, | |
6ad112bf CH |
224 | XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), |
225 | XFS_FSS_TO_BB(mp, 1), XBF_LOCK | XBF_MAPPED); | |
1da177e4 LT |
226 | agi = XFS_BUF_TO_AGI(bp); |
227 | memset(agi, 0, mp->m_sb.sb_sectsize); | |
16259e7d CH |
228 | agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC); |
229 | agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION); | |
230 | agi->agi_seqno = cpu_to_be32(agno); | |
231 | agi->agi_length = cpu_to_be32(agsize); | |
1da177e4 | 232 | agi->agi_count = 0; |
16259e7d CH |
233 | agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp)); |
234 | agi->agi_level = cpu_to_be32(1); | |
1da177e4 | 235 | agi->agi_freecount = 0; |
16259e7d CH |
236 | agi->agi_newino = cpu_to_be32(NULLAGINO); |
237 | agi->agi_dirino = cpu_to_be32(NULLAGINO); | |
1da177e4 | 238 | for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) |
16259e7d | 239 | agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); |
1da177e4 LT |
240 | error = xfs_bwrite(mp, bp); |
241 | if (error) { | |
242 | goto error0; | |
243 | } | |
244 | /* | |
245 | * BNO btree root block | |
246 | */ | |
247 | bp = xfs_buf_get(mp->m_ddev_targp, | |
6ad112bf CH |
248 | XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), |
249 | BTOBB(mp->m_sb.sb_blocksize), | |
250 | XBF_LOCK | XBF_MAPPED); | |
7cc95a82 | 251 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 | 252 | memset(block, 0, mp->m_sb.sb_blocksize); |
16259e7d | 253 | block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC); |
1da177e4 | 254 | block->bb_level = 0; |
16259e7d | 255 | block->bb_numrecs = cpu_to_be16(1); |
7cc95a82 CH |
256 | block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK); |
257 | block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK); | |
136341b4 | 258 | arec = XFS_ALLOC_REC_ADDR(mp, block, 1); |
16259e7d CH |
259 | arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); |
260 | arec->ar_blockcount = cpu_to_be32( | |
261 | agsize - be32_to_cpu(arec->ar_startblock)); | |
1da177e4 LT |
262 | error = xfs_bwrite(mp, bp); |
263 | if (error) { | |
264 | goto error0; | |
265 | } | |
266 | /* | |
267 | * CNT btree root block | |
268 | */ | |
269 | bp = xfs_buf_get(mp->m_ddev_targp, | |
6ad112bf CH |
270 | XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)), |
271 | BTOBB(mp->m_sb.sb_blocksize), | |
272 | XBF_LOCK | XBF_MAPPED); | |
7cc95a82 | 273 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 | 274 | memset(block, 0, mp->m_sb.sb_blocksize); |
16259e7d | 275 | block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC); |
1da177e4 | 276 | block->bb_level = 0; |
16259e7d | 277 | block->bb_numrecs = cpu_to_be16(1); |
7cc95a82 CH |
278 | block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK); |
279 | block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK); | |
136341b4 | 280 | arec = XFS_ALLOC_REC_ADDR(mp, block, 1); |
16259e7d CH |
281 | arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); |
282 | arec->ar_blockcount = cpu_to_be32( | |
283 | agsize - be32_to_cpu(arec->ar_startblock)); | |
284 | nfree += be32_to_cpu(arec->ar_blockcount); | |
1da177e4 LT |
285 | error = xfs_bwrite(mp, bp); |
286 | if (error) { | |
287 | goto error0; | |
288 | } | |
289 | /* | |
290 | * INO btree root block | |
291 | */ | |
292 | bp = xfs_buf_get(mp->m_ddev_targp, | |
6ad112bf CH |
293 | XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), |
294 | BTOBB(mp->m_sb.sb_blocksize), | |
295 | XBF_LOCK | XBF_MAPPED); | |
7cc95a82 | 296 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 | 297 | memset(block, 0, mp->m_sb.sb_blocksize); |
16259e7d | 298 | block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC); |
1da177e4 LT |
299 | block->bb_level = 0; |
300 | block->bb_numrecs = 0; | |
7cc95a82 CH |
301 | block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK); |
302 | block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK); | |
1da177e4 LT |
303 | error = xfs_bwrite(mp, bp); |
304 | if (error) { | |
305 | goto error0; | |
306 | } | |
307 | } | |
308 | xfs_trans_agblocks_delta(tp, nfree); | |
309 | /* | |
310 | * There are new blocks in the old last a.g. | |
311 | */ | |
312 | if (new) { | |
313 | /* | |
314 | * Change the agi length. | |
315 | */ | |
316 | error = xfs_ialloc_read_agi(mp, tp, agno, &bp); | |
317 | if (error) { | |
318 | goto error0; | |
319 | } | |
320 | ASSERT(bp); | |
321 | agi = XFS_BUF_TO_AGI(bp); | |
413d57c9 | 322 | be32_add_cpu(&agi->agi_length, new); |
1da177e4 | 323 | ASSERT(nagcount == oagcount || |
16259e7d | 324 | be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks); |
1da177e4 LT |
325 | xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH); |
326 | /* | |
327 | * Change agf length. | |
328 | */ | |
329 | error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp); | |
330 | if (error) { | |
331 | goto error0; | |
332 | } | |
333 | ASSERT(bp); | |
334 | agf = XFS_BUF_TO_AGF(bp); | |
413d57c9 | 335 | be32_add_cpu(&agf->agf_length, new); |
16259e7d CH |
336 | ASSERT(be32_to_cpu(agf->agf_length) == |
337 | be32_to_cpu(agi->agi_length)); | |
0b1b213f | 338 | |
0164af51 | 339 | xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH); |
1da177e4 LT |
340 | /* |
341 | * Free the new space. | |
342 | */ | |
343 | error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno, | |
16259e7d | 344 | be32_to_cpu(agf->agf_length) - new), new); |
1da177e4 LT |
345 | if (error) { |
346 | goto error0; | |
347 | } | |
348 | } | |
1c1c6ebc DC |
349 | |
350 | /* | |
351 | * Update changed superblock fields transactionally. These are not | |
352 | * seen by the rest of the world until the transaction commit applies | |
353 | * them atomically to the superblock. | |
354 | */ | |
1da177e4 LT |
355 | if (nagcount > oagcount) |
356 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount); | |
357 | if (nb > mp->m_sb.sb_dblocks) | |
358 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, | |
359 | nb - mp->m_sb.sb_dblocks); | |
360 | if (nfree) | |
361 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree); | |
362 | if (dpct) | |
363 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct); | |
1c72bf90 | 364 | error = xfs_trans_commit(tp, 0); |
1c1c6ebc | 365 | if (error) |
1da177e4 | 366 | return error; |
1c1c6ebc | 367 | |
1da177e4 LT |
368 | /* New allocation groups fully initialized, so update mount struct */ |
369 | if (nagimax) | |
370 | mp->m_maxagi = nagimax; | |
371 | if (mp->m_sb.sb_imax_pct) { | |
372 | __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct; | |
373 | do_div(icount, 100); | |
374 | mp->m_maxicount = icount << mp->m_sb.sb_inopblog; | |
375 | } else | |
376 | mp->m_maxicount = 0; | |
1c1c6ebc DC |
377 | |
378 | /* update secondary superblocks. */ | |
1da177e4 LT |
379 | for (agno = 1; agno < nagcount; agno++) { |
380 | error = xfs_read_buf(mp, mp->m_ddev_targp, | |
381 | XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
382 | XFS_FSS_TO_BB(mp, 1), 0, &bp); | |
383 | if (error) { | |
384 | xfs_fs_cmn_err(CE_WARN, mp, | |
385 | "error %d reading secondary superblock for ag %d", | |
386 | error, agno); | |
387 | break; | |
388 | } | |
2bdf7cd0 | 389 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS); |
1da177e4 LT |
390 | /* |
391 | * If we get an error writing out the alternate superblocks, | |
392 | * just issue a warning and continue. The real work is | |
393 | * already done and committed. | |
394 | */ | |
395 | if (!(error = xfs_bwrite(mp, bp))) { | |
396 | continue; | |
397 | } else { | |
398 | xfs_fs_cmn_err(CE_WARN, mp, | |
399 | "write error %d updating secondary superblock for ag %d", | |
400 | error, agno); | |
401 | break; /* no point in continuing */ | |
402 | } | |
403 | } | |
404 | return 0; | |
405 | ||
406 | error0: | |
407 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); | |
408 | return error; | |
409 | } | |
410 | ||
411 | static int | |
412 | xfs_growfs_log_private( | |
413 | xfs_mount_t *mp, /* mount point for filesystem */ | |
414 | xfs_growfs_log_t *in) /* growfs log input struct */ | |
415 | { | |
416 | xfs_extlen_t nb; | |
417 | ||
418 | nb = in->newblocks; | |
419 | if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES)) | |
420 | return XFS_ERROR(EINVAL); | |
421 | if (nb == mp->m_sb.sb_logblocks && | |
422 | in->isint == (mp->m_sb.sb_logstart != 0)) | |
423 | return XFS_ERROR(EINVAL); | |
424 | /* | |
425 | * Moving the log is hard, need new interfaces to sync | |
426 | * the log first, hold off all activity while moving it. | |
427 | * Can have shorter or longer log in the same space, | |
428 | * or transform internal to external log or vice versa. | |
429 | */ | |
430 | return XFS_ERROR(ENOSYS); | |
431 | } | |
432 | ||
433 | /* | |
434 | * protected versions of growfs function acquire and release locks on the mount | |
435 | * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG, | |
436 | * XFS_IOC_FSGROWFSRT | |
437 | */ | |
438 | ||
439 | ||
440 | int | |
441 | xfs_growfs_data( | |
442 | xfs_mount_t *mp, | |
443 | xfs_growfs_data_t *in) | |
444 | { | |
445 | int error; | |
743bb465 | 446 | |
447 | if (!capable(CAP_SYS_ADMIN)) | |
448 | return XFS_ERROR(EPERM); | |
cc92e7ac | 449 | if (!mutex_trylock(&mp->m_growlock)) |
1da177e4 LT |
450 | return XFS_ERROR(EWOULDBLOCK); |
451 | error = xfs_growfs_data_private(mp, in); | |
cc92e7ac | 452 | mutex_unlock(&mp->m_growlock); |
1da177e4 LT |
453 | return error; |
454 | } | |
455 | ||
456 | int | |
457 | xfs_growfs_log( | |
458 | xfs_mount_t *mp, | |
459 | xfs_growfs_log_t *in) | |
460 | { | |
461 | int error; | |
743bb465 | 462 | |
463 | if (!capable(CAP_SYS_ADMIN)) | |
464 | return XFS_ERROR(EPERM); | |
cc92e7ac | 465 | if (!mutex_trylock(&mp->m_growlock)) |
1da177e4 LT |
466 | return XFS_ERROR(EWOULDBLOCK); |
467 | error = xfs_growfs_log_private(mp, in); | |
cc92e7ac | 468 | mutex_unlock(&mp->m_growlock); |
1da177e4 LT |
469 | return error; |
470 | } | |
471 | ||
472 | /* | |
473 | * exported through ioctl XFS_IOC_FSCOUNTS | |
474 | */ | |
475 | ||
476 | int | |
477 | xfs_fs_counts( | |
478 | xfs_mount_t *mp, | |
479 | xfs_fsop_counts_t *cnt) | |
480 | { | |
d4d90b57 | 481 | xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); |
3685c2a1 | 482 | spin_lock(&mp->m_sb_lock); |
4be536de | 483 | cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); |
1da177e4 LT |
484 | cnt->freertx = mp->m_sb.sb_frextents; |
485 | cnt->freeino = mp->m_sb.sb_ifree; | |
486 | cnt->allocino = mp->m_sb.sb_icount; | |
3685c2a1 | 487 | spin_unlock(&mp->m_sb_lock); |
1da177e4 LT |
488 | return 0; |
489 | } | |
490 | ||
491 | /* | |
492 | * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS | |
493 | * | |
494 | * xfs_reserve_blocks is called to set m_resblks | |
495 | * in the in-core mount table. The number of unused reserved blocks | |
c41564b5 | 496 | * is kept in m_resblks_avail. |
1da177e4 LT |
497 | * |
498 | * Reserve the requested number of blocks if available. Otherwise return | |
499 | * as many as possible to satisfy the request. The actual number | |
500 | * reserved are returned in outval | |
501 | * | |
502 | * A null inval pointer indicates that only the current reserved blocks | |
503 | * available should be returned no settings are changed. | |
504 | */ | |
505 | ||
506 | int | |
507 | xfs_reserve_blocks( | |
508 | xfs_mount_t *mp, | |
509 | __uint64_t *inval, | |
510 | xfs_fsop_resblks_t *outval) | |
511 | { | |
dbcabad1 | 512 | __int64_t lcounter, delta, fdblks_delta; |
1da177e4 | 513 | __uint64_t request; |
1da177e4 LT |
514 | |
515 | /* If inval is null, report current values and return */ | |
1da177e4 | 516 | if (inval == (__uint64_t *)NULL) { |
84e1e99f DC |
517 | if (!outval) |
518 | return EINVAL; | |
1da177e4 LT |
519 | outval->resblks = mp->m_resblks; |
520 | outval->resblks_avail = mp->m_resblks_avail; | |
014c2544 | 521 | return 0; |
1da177e4 LT |
522 | } |
523 | ||
524 | request = *inval; | |
dbcabad1 DC |
525 | |
526 | /* | |
527 | * With per-cpu counters, this becomes an interesting | |
528 | * problem. we needto work out if we are freeing or allocation | |
529 | * blocks first, then we can do the modification as necessary. | |
530 | * | |
3685c2a1 | 531 | * We do this under the m_sb_lock so that if we are near |
dbcabad1 DC |
532 | * ENOSPC, we will hold out any changes while we work out |
533 | * what to do. This means that the amount of free space can | |
534 | * change while we do this, so we need to retry if we end up | |
535 | * trying to reserve more space than is available. | |
536 | * | |
537 | * We also use the xfs_mod_incore_sb() interface so that we | |
538 | * don't have to care about whether per cpu counter are | |
539 | * enabled, disabled or even compiled in.... | |
540 | */ | |
541 | retry: | |
3685c2a1 | 542 | spin_lock(&mp->m_sb_lock); |
d4d90b57 | 543 | xfs_icsb_sync_counters_locked(mp, 0); |
1da177e4 LT |
544 | |
545 | /* | |
546 | * If our previous reservation was larger than the current value, | |
547 | * then move any unused blocks back to the free pool. | |
548 | */ | |
dbcabad1 | 549 | fdblks_delta = 0; |
1da177e4 LT |
550 | if (mp->m_resblks > request) { |
551 | lcounter = mp->m_resblks_avail - request; | |
552 | if (lcounter > 0) { /* release unused blocks */ | |
dbcabad1 | 553 | fdblks_delta = lcounter; |
1da177e4 LT |
554 | mp->m_resblks_avail -= lcounter; |
555 | } | |
556 | mp->m_resblks = request; | |
557 | } else { | |
4be536de DC |
558 | __int64_t free; |
559 | ||
560 | free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); | |
dbcabad1 DC |
561 | if (!free) |
562 | goto out; /* ENOSPC and fdblks_delta = 0 */ | |
563 | ||
1da177e4 | 564 | delta = request - mp->m_resblks; |
4be536de | 565 | lcounter = free - delta; |
1da177e4 LT |
566 | if (lcounter < 0) { |
567 | /* We can't satisfy the request, just get what we can */ | |
4be536de DC |
568 | mp->m_resblks += free; |
569 | mp->m_resblks_avail += free; | |
dbcabad1 | 570 | fdblks_delta = -free; |
1da177e4 | 571 | } else { |
dbcabad1 | 572 | fdblks_delta = -delta; |
1da177e4 LT |
573 | mp->m_resblks = request; |
574 | mp->m_resblks_avail += delta; | |
575 | } | |
576 | } | |
dbcabad1 | 577 | out: |
84e1e99f DC |
578 | if (outval) { |
579 | outval->resblks = mp->m_resblks; | |
580 | outval->resblks_avail = mp->m_resblks_avail; | |
581 | } | |
3685c2a1 | 582 | spin_unlock(&mp->m_sb_lock); |
dbcabad1 DC |
583 | |
584 | if (fdblks_delta) { | |
585 | /* | |
586 | * If we are putting blocks back here, m_resblks_avail is | |
9da096fd | 587 | * already at its max so this will put it in the free pool. |
dbcabad1 DC |
588 | * |
589 | * If we need space, we'll either succeed in getting it | |
590 | * from the free block count or we'll get an enospc. If | |
591 | * we get a ENOSPC, it means things changed while we were | |
592 | * calculating fdblks_delta and so we should try again to | |
593 | * see if there is anything left to reserve. | |
594 | * | |
595 | * Don't set the reserved flag here - we don't want to reserve | |
596 | * the extra reserve blocks from the reserve..... | |
597 | */ | |
598 | int error; | |
96540c78 CH |
599 | error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, |
600 | fdblks_delta, 0); | |
dbcabad1 DC |
601 | if (error == ENOSPC) |
602 | goto retry; | |
603 | } | |
014c2544 | 604 | return 0; |
1da177e4 LT |
605 | } |
606 | ||
1a387d3b DC |
607 | /* |
608 | * Dump a transaction into the log that contains no real change. This is needed | |
609 | * to be able to make the log dirty or stamp the current tail LSN into the log | |
610 | * during the covering operation. | |
611 | * | |
612 | * We cannot use an inode here for this - that will push dirty state back up | |
613 | * into the VFS and then periodic inode flushing will prevent log covering from | |
614 | * making progress. Hence we log a field in the superblock instead. | |
615 | */ | |
c4be0c1d | 616 | int |
421ad134 | 617 | xfs_fs_log_dummy( |
1a387d3b DC |
618 | xfs_mount_t *mp, |
619 | int flags) | |
e13a73f0 | 620 | { |
421ad134 | 621 | xfs_trans_t *tp; |
c4be0c1d | 622 | int error; |
e13a73f0 | 623 | |
80641dc6 | 624 | tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1, KM_SLEEP); |
1a387d3b DC |
625 | error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0, |
626 | XFS_DEFAULT_LOG_COUNT); | |
c4be0c1d | 627 | if (error) { |
e13a73f0 | 628 | xfs_trans_cancel(tp, 0); |
c4be0c1d | 629 | return error; |
e13a73f0 CH |
630 | } |
631 | ||
1a387d3b DC |
632 | /* log the UUID because it is an unchanging field */ |
633 | xfs_mod_sb(tp, XFS_SB_UUID); | |
634 | if (flags & SYNC_WAIT) | |
635 | xfs_trans_set_sync(tp); | |
636 | return xfs_trans_commit(tp, 0); | |
e13a73f0 CH |
637 | } |
638 | ||
1da177e4 LT |
639 | int |
640 | xfs_fs_goingdown( | |
641 | xfs_mount_t *mp, | |
642 | __uint32_t inflags) | |
643 | { | |
644 | switch (inflags) { | |
645 | case XFS_FSOP_GOING_FLAGS_DEFAULT: { | |
b267ce99 | 646 | struct super_block *sb = freeze_bdev(mp->m_super->s_bdev); |
1da177e4 | 647 | |
f33c6797 | 648 | if (sb && !IS_ERR(sb)) { |
7d04a335 | 649 | xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); |
1da177e4 LT |
650 | thaw_bdev(sb->s_bdev, sb); |
651 | } | |
189f4bf2 | 652 | |
1da177e4 LT |
653 | break; |
654 | } | |
655 | case XFS_FSOP_GOING_FLAGS_LOGFLUSH: | |
7d04a335 | 656 | xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); |
1da177e4 LT |
657 | break; |
658 | case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH: | |
7d04a335 NS |
659 | xfs_force_shutdown(mp, |
660 | SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR); | |
1da177e4 LT |
661 | break; |
662 | default: | |
663 | return XFS_ERROR(EINVAL); | |
664 | } | |
665 | ||
666 | return 0; | |
667 | } |