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Commit | Line | Data |
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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) ? |
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; |
e70b73f8 | 147 | bp = xfs_buf_read_uncached(mp->m_ddev_targp, |
1922c949 | 148 | XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1), |
e70b73f8 | 149 | XFS_FSS_TO_BB(mp, 1), 0); |
1922c949 DC |
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 | 192 | XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), |
611c9946 | 193 | XFS_FSS_TO_BB(mp, 1), 0); |
b522950f CS |
194 | if (!bp) { |
195 | error = ENOMEM; | |
196 | goto error0; | |
197 | } | |
1da177e4 LT |
198 | agf = XFS_BUF_TO_AGF(bp); |
199 | memset(agf, 0, mp->m_sb.sb_sectsize); | |
16259e7d CH |
200 | agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC); |
201 | agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION); | |
202 | agf->agf_seqno = cpu_to_be32(agno); | |
1da177e4 LT |
203 | if (agno == nagcount - 1) |
204 | agsize = | |
205 | nb - | |
206 | (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks); | |
207 | else | |
208 | agsize = mp->m_sb.sb_agblocks; | |
16259e7d CH |
209 | agf->agf_length = cpu_to_be32(agsize); |
210 | agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp)); | |
211 | agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp)); | |
212 | agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1); | |
213 | agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1); | |
1da177e4 | 214 | agf->agf_flfirst = 0; |
16259e7d | 215 | agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1); |
1da177e4 LT |
216 | agf->agf_flcount = 0; |
217 | tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp); | |
16259e7d CH |
218 | agf->agf_freeblks = cpu_to_be32(tmpsize); |
219 | agf->agf_longest = cpu_to_be32(tmpsize); | |
c2b006c1 CH |
220 | error = xfs_bwrite(bp); |
221 | xfs_buf_relse(bp); | |
222 | if (error) | |
1da177e4 | 223 | goto error0; |
c2b006c1 | 224 | |
1da177e4 LT |
225 | /* |
226 | * AG inode header block | |
227 | */ | |
228 | bp = xfs_buf_get(mp->m_ddev_targp, | |
6ad112bf | 229 | XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), |
611c9946 | 230 | XFS_FSS_TO_BB(mp, 1), 0); |
b522950f CS |
231 | if (!bp) { |
232 | error = ENOMEM; | |
233 | goto error0; | |
234 | } | |
1da177e4 LT |
235 | agi = XFS_BUF_TO_AGI(bp); |
236 | memset(agi, 0, mp->m_sb.sb_sectsize); | |
16259e7d CH |
237 | agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC); |
238 | agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION); | |
239 | agi->agi_seqno = cpu_to_be32(agno); | |
240 | agi->agi_length = cpu_to_be32(agsize); | |
1da177e4 | 241 | agi->agi_count = 0; |
16259e7d CH |
242 | agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp)); |
243 | agi->agi_level = cpu_to_be32(1); | |
1da177e4 | 244 | agi->agi_freecount = 0; |
16259e7d CH |
245 | agi->agi_newino = cpu_to_be32(NULLAGINO); |
246 | agi->agi_dirino = cpu_to_be32(NULLAGINO); | |
1da177e4 | 247 | for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) |
16259e7d | 248 | agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); |
c2b006c1 CH |
249 | error = xfs_bwrite(bp); |
250 | xfs_buf_relse(bp); | |
251 | if (error) | |
1da177e4 | 252 | goto error0; |
c2b006c1 | 253 | |
1da177e4 LT |
254 | /* |
255 | * BNO btree root block | |
256 | */ | |
257 | bp = xfs_buf_get(mp->m_ddev_targp, | |
6ad112bf | 258 | XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), |
611c9946 | 259 | BTOBB(mp->m_sb.sb_blocksize), 0); |
b522950f CS |
260 | if (!bp) { |
261 | error = ENOMEM; | |
262 | goto error0; | |
263 | } | |
7cc95a82 | 264 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 | 265 | memset(block, 0, mp->m_sb.sb_blocksize); |
16259e7d | 266 | block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC); |
1da177e4 | 267 | block->bb_level = 0; |
16259e7d | 268 | block->bb_numrecs = cpu_to_be16(1); |
7cc95a82 CH |
269 | block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK); |
270 | block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK); | |
136341b4 | 271 | arec = XFS_ALLOC_REC_ADDR(mp, block, 1); |
16259e7d CH |
272 | arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); |
273 | arec->ar_blockcount = cpu_to_be32( | |
274 | agsize - be32_to_cpu(arec->ar_startblock)); | |
c2b006c1 CH |
275 | error = xfs_bwrite(bp); |
276 | xfs_buf_relse(bp); | |
277 | if (error) | |
1da177e4 | 278 | goto error0; |
c2b006c1 | 279 | |
1da177e4 LT |
280 | /* |
281 | * CNT btree root block | |
282 | */ | |
283 | bp = xfs_buf_get(mp->m_ddev_targp, | |
6ad112bf | 284 | XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)), |
611c9946 | 285 | BTOBB(mp->m_sb.sb_blocksize), 0); |
b522950f CS |
286 | if (!bp) { |
287 | error = ENOMEM; | |
288 | goto error0; | |
289 | } | |
7cc95a82 | 290 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 | 291 | memset(block, 0, mp->m_sb.sb_blocksize); |
16259e7d | 292 | block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC); |
1da177e4 | 293 | block->bb_level = 0; |
16259e7d | 294 | block->bb_numrecs = cpu_to_be16(1); |
7cc95a82 CH |
295 | block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK); |
296 | block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK); | |
136341b4 | 297 | arec = XFS_ALLOC_REC_ADDR(mp, block, 1); |
16259e7d CH |
298 | arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); |
299 | arec->ar_blockcount = cpu_to_be32( | |
300 | agsize - be32_to_cpu(arec->ar_startblock)); | |
301 | nfree += be32_to_cpu(arec->ar_blockcount); | |
c2b006c1 CH |
302 | error = xfs_bwrite(bp); |
303 | xfs_buf_relse(bp); | |
304 | if (error) | |
1da177e4 | 305 | goto error0; |
c2b006c1 | 306 | |
1da177e4 LT |
307 | /* |
308 | * INO btree root block | |
309 | */ | |
310 | bp = xfs_buf_get(mp->m_ddev_targp, | |
6ad112bf | 311 | XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), |
611c9946 | 312 | BTOBB(mp->m_sb.sb_blocksize), 0); |
b522950f CS |
313 | if (!bp) { |
314 | error = ENOMEM; | |
315 | goto error0; | |
316 | } | |
7cc95a82 | 317 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 | 318 | memset(block, 0, mp->m_sb.sb_blocksize); |
16259e7d | 319 | block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC); |
1da177e4 LT |
320 | block->bb_level = 0; |
321 | block->bb_numrecs = 0; | |
7cc95a82 CH |
322 | block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK); |
323 | block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK); | |
c2b006c1 CH |
324 | error = xfs_bwrite(bp); |
325 | xfs_buf_relse(bp); | |
326 | if (error) | |
1da177e4 | 327 | goto error0; |
1da177e4 LT |
328 | } |
329 | xfs_trans_agblocks_delta(tp, nfree); | |
330 | /* | |
331 | * There are new blocks in the old last a.g. | |
332 | */ | |
333 | if (new) { | |
334 | /* | |
335 | * Change the agi length. | |
336 | */ | |
337 | error = xfs_ialloc_read_agi(mp, tp, agno, &bp); | |
338 | if (error) { | |
339 | goto error0; | |
340 | } | |
341 | ASSERT(bp); | |
342 | agi = XFS_BUF_TO_AGI(bp); | |
413d57c9 | 343 | be32_add_cpu(&agi->agi_length, new); |
1da177e4 | 344 | ASSERT(nagcount == oagcount || |
16259e7d | 345 | be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks); |
1da177e4 LT |
346 | xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH); |
347 | /* | |
348 | * Change agf length. | |
349 | */ | |
350 | error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp); | |
351 | if (error) { | |
352 | goto error0; | |
353 | } | |
354 | ASSERT(bp); | |
355 | agf = XFS_BUF_TO_AGF(bp); | |
413d57c9 | 356 | be32_add_cpu(&agf->agf_length, new); |
16259e7d CH |
357 | ASSERT(be32_to_cpu(agf->agf_length) == |
358 | be32_to_cpu(agi->agi_length)); | |
0b1b213f | 359 | |
0164af51 | 360 | xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH); |
1da177e4 LT |
361 | /* |
362 | * Free the new space. | |
363 | */ | |
364 | error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno, | |
16259e7d | 365 | be32_to_cpu(agf->agf_length) - new), new); |
1da177e4 LT |
366 | if (error) { |
367 | goto error0; | |
368 | } | |
369 | } | |
1c1c6ebc DC |
370 | |
371 | /* | |
372 | * Update changed superblock fields transactionally. These are not | |
373 | * seen by the rest of the world until the transaction commit applies | |
374 | * them atomically to the superblock. | |
375 | */ | |
1da177e4 LT |
376 | if (nagcount > oagcount) |
377 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount); | |
378 | if (nb > mp->m_sb.sb_dblocks) | |
379 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, | |
380 | nb - mp->m_sb.sb_dblocks); | |
381 | if (nfree) | |
382 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree); | |
383 | if (dpct) | |
384 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct); | |
1c72bf90 | 385 | error = xfs_trans_commit(tp, 0); |
1c1c6ebc | 386 | if (error) |
1da177e4 | 387 | return error; |
1c1c6ebc | 388 | |
1da177e4 LT |
389 | /* New allocation groups fully initialized, so update mount struct */ |
390 | if (nagimax) | |
391 | mp->m_maxagi = nagimax; | |
392 | if (mp->m_sb.sb_imax_pct) { | |
393 | __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct; | |
394 | do_div(icount, 100); | |
395 | mp->m_maxicount = icount << mp->m_sb.sb_inopblog; | |
396 | } else | |
397 | mp->m_maxicount = 0; | |
055388a3 | 398 | xfs_set_low_space_thresholds(mp); |
1c1c6ebc DC |
399 | |
400 | /* update secondary superblocks. */ | |
1da177e4 | 401 | for (agno = 1; agno < nagcount; agno++) { |
7ca790a5 | 402 | error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, |
1da177e4 LT |
403 | XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), |
404 | XFS_FSS_TO_BB(mp, 1), 0, &bp); | |
405 | if (error) { | |
53487786 DC |
406 | xfs_warn(mp, |
407 | "error %d reading secondary superblock for ag %d", | |
1da177e4 LT |
408 | error, agno); |
409 | break; | |
410 | } | |
2bdf7cd0 | 411 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS); |
1da177e4 LT |
412 | /* |
413 | * If we get an error writing out the alternate superblocks, | |
414 | * just issue a warning and continue. The real work is | |
415 | * already done and committed. | |
416 | */ | |
c2b006c1 CH |
417 | error = xfs_bwrite(bp); |
418 | xfs_buf_relse(bp); | |
419 | if (error) { | |
53487786 | 420 | xfs_warn(mp, |
1da177e4 LT |
421 | "write error %d updating secondary superblock for ag %d", |
422 | error, agno); | |
423 | break; /* no point in continuing */ | |
424 | } | |
425 | } | |
426 | return 0; | |
427 | ||
428 | error0: | |
429 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); | |
430 | return error; | |
431 | } | |
432 | ||
433 | static int | |
434 | xfs_growfs_log_private( | |
435 | xfs_mount_t *mp, /* mount point for filesystem */ | |
436 | xfs_growfs_log_t *in) /* growfs log input struct */ | |
437 | { | |
438 | xfs_extlen_t nb; | |
439 | ||
440 | nb = in->newblocks; | |
441 | if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES)) | |
442 | return XFS_ERROR(EINVAL); | |
443 | if (nb == mp->m_sb.sb_logblocks && | |
444 | in->isint == (mp->m_sb.sb_logstart != 0)) | |
445 | return XFS_ERROR(EINVAL); | |
446 | /* | |
447 | * Moving the log is hard, need new interfaces to sync | |
448 | * the log first, hold off all activity while moving it. | |
449 | * Can have shorter or longer log in the same space, | |
450 | * or transform internal to external log or vice versa. | |
451 | */ | |
452 | return XFS_ERROR(ENOSYS); | |
453 | } | |
454 | ||
455 | /* | |
456 | * protected versions of growfs function acquire and release locks on the mount | |
457 | * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG, | |
458 | * XFS_IOC_FSGROWFSRT | |
459 | */ | |
460 | ||
461 | ||
462 | int | |
463 | xfs_growfs_data( | |
464 | xfs_mount_t *mp, | |
465 | xfs_growfs_data_t *in) | |
466 | { | |
467 | int error; | |
743bb465 | 468 | |
469 | if (!capable(CAP_SYS_ADMIN)) | |
470 | return XFS_ERROR(EPERM); | |
cc92e7ac | 471 | if (!mutex_trylock(&mp->m_growlock)) |
1da177e4 LT |
472 | return XFS_ERROR(EWOULDBLOCK); |
473 | error = xfs_growfs_data_private(mp, in); | |
cc92e7ac | 474 | mutex_unlock(&mp->m_growlock); |
1da177e4 LT |
475 | return error; |
476 | } | |
477 | ||
478 | int | |
479 | xfs_growfs_log( | |
480 | xfs_mount_t *mp, | |
481 | xfs_growfs_log_t *in) | |
482 | { | |
483 | int error; | |
743bb465 | 484 | |
485 | if (!capable(CAP_SYS_ADMIN)) | |
486 | return XFS_ERROR(EPERM); | |
cc92e7ac | 487 | if (!mutex_trylock(&mp->m_growlock)) |
1da177e4 LT |
488 | return XFS_ERROR(EWOULDBLOCK); |
489 | error = xfs_growfs_log_private(mp, in); | |
cc92e7ac | 490 | mutex_unlock(&mp->m_growlock); |
1da177e4 LT |
491 | return error; |
492 | } | |
493 | ||
494 | /* | |
495 | * exported through ioctl XFS_IOC_FSCOUNTS | |
496 | */ | |
497 | ||
498 | int | |
499 | xfs_fs_counts( | |
500 | xfs_mount_t *mp, | |
501 | xfs_fsop_counts_t *cnt) | |
502 | { | |
d4d90b57 | 503 | xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); |
3685c2a1 | 504 | spin_lock(&mp->m_sb_lock); |
4be536de | 505 | cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); |
1da177e4 LT |
506 | cnt->freertx = mp->m_sb.sb_frextents; |
507 | cnt->freeino = mp->m_sb.sb_ifree; | |
508 | cnt->allocino = mp->m_sb.sb_icount; | |
3685c2a1 | 509 | spin_unlock(&mp->m_sb_lock); |
1da177e4 LT |
510 | return 0; |
511 | } | |
512 | ||
513 | /* | |
514 | * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS | |
515 | * | |
516 | * xfs_reserve_blocks is called to set m_resblks | |
517 | * in the in-core mount table. The number of unused reserved blocks | |
c41564b5 | 518 | * is kept in m_resblks_avail. |
1da177e4 LT |
519 | * |
520 | * Reserve the requested number of blocks if available. Otherwise return | |
521 | * as many as possible to satisfy the request. The actual number | |
522 | * reserved are returned in outval | |
523 | * | |
524 | * A null inval pointer indicates that only the current reserved blocks | |
525 | * available should be returned no settings are changed. | |
526 | */ | |
527 | ||
528 | int | |
529 | xfs_reserve_blocks( | |
530 | xfs_mount_t *mp, | |
531 | __uint64_t *inval, | |
532 | xfs_fsop_resblks_t *outval) | |
533 | { | |
dbcabad1 | 534 | __int64_t lcounter, delta, fdblks_delta; |
1da177e4 | 535 | __uint64_t request; |
1da177e4 LT |
536 | |
537 | /* If inval is null, report current values and return */ | |
1da177e4 | 538 | if (inval == (__uint64_t *)NULL) { |
84e1e99f DC |
539 | if (!outval) |
540 | return EINVAL; | |
1da177e4 LT |
541 | outval->resblks = mp->m_resblks; |
542 | outval->resblks_avail = mp->m_resblks_avail; | |
014c2544 | 543 | return 0; |
1da177e4 LT |
544 | } |
545 | ||
546 | request = *inval; | |
dbcabad1 DC |
547 | |
548 | /* | |
549 | * With per-cpu counters, this becomes an interesting | |
550 | * problem. we needto work out if we are freeing or allocation | |
551 | * blocks first, then we can do the modification as necessary. | |
552 | * | |
3685c2a1 | 553 | * We do this under the m_sb_lock so that if we are near |
dbcabad1 DC |
554 | * ENOSPC, we will hold out any changes while we work out |
555 | * what to do. This means that the amount of free space can | |
556 | * change while we do this, so we need to retry if we end up | |
557 | * trying to reserve more space than is available. | |
558 | * | |
559 | * We also use the xfs_mod_incore_sb() interface so that we | |
560 | * don't have to care about whether per cpu counter are | |
561 | * enabled, disabled or even compiled in.... | |
562 | */ | |
563 | retry: | |
3685c2a1 | 564 | spin_lock(&mp->m_sb_lock); |
d4d90b57 | 565 | xfs_icsb_sync_counters_locked(mp, 0); |
1da177e4 LT |
566 | |
567 | /* | |
568 | * If our previous reservation was larger than the current value, | |
569 | * then move any unused blocks back to the free pool. | |
570 | */ | |
dbcabad1 | 571 | fdblks_delta = 0; |
1da177e4 LT |
572 | if (mp->m_resblks > request) { |
573 | lcounter = mp->m_resblks_avail - request; | |
574 | if (lcounter > 0) { /* release unused blocks */ | |
dbcabad1 | 575 | fdblks_delta = lcounter; |
1da177e4 LT |
576 | mp->m_resblks_avail -= lcounter; |
577 | } | |
578 | mp->m_resblks = request; | |
579 | } else { | |
4be536de DC |
580 | __int64_t free; |
581 | ||
582 | free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); | |
dbcabad1 DC |
583 | if (!free) |
584 | goto out; /* ENOSPC and fdblks_delta = 0 */ | |
585 | ||
1da177e4 | 586 | delta = request - mp->m_resblks; |
4be536de | 587 | lcounter = free - delta; |
1da177e4 LT |
588 | if (lcounter < 0) { |
589 | /* We can't satisfy the request, just get what we can */ | |
4be536de DC |
590 | mp->m_resblks += free; |
591 | mp->m_resblks_avail += free; | |
dbcabad1 | 592 | fdblks_delta = -free; |
1da177e4 | 593 | } else { |
dbcabad1 | 594 | fdblks_delta = -delta; |
1da177e4 LT |
595 | mp->m_resblks = request; |
596 | mp->m_resblks_avail += delta; | |
597 | } | |
598 | } | |
dbcabad1 | 599 | out: |
84e1e99f DC |
600 | if (outval) { |
601 | outval->resblks = mp->m_resblks; | |
602 | outval->resblks_avail = mp->m_resblks_avail; | |
603 | } | |
3685c2a1 | 604 | spin_unlock(&mp->m_sb_lock); |
dbcabad1 DC |
605 | |
606 | if (fdblks_delta) { | |
607 | /* | |
608 | * If we are putting blocks back here, m_resblks_avail is | |
9da096fd | 609 | * already at its max so this will put it in the free pool. |
dbcabad1 DC |
610 | * |
611 | * If we need space, we'll either succeed in getting it | |
612 | * from the free block count or we'll get an enospc. If | |
613 | * we get a ENOSPC, it means things changed while we were | |
614 | * calculating fdblks_delta and so we should try again to | |
615 | * see if there is anything left to reserve. | |
616 | * | |
617 | * Don't set the reserved flag here - we don't want to reserve | |
618 | * the extra reserve blocks from the reserve..... | |
619 | */ | |
620 | int error; | |
96540c78 CH |
621 | error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, |
622 | fdblks_delta, 0); | |
dbcabad1 DC |
623 | if (error == ENOSPC) |
624 | goto retry; | |
625 | } | |
014c2544 | 626 | return 0; |
1da177e4 LT |
627 | } |
628 | ||
1a387d3b DC |
629 | /* |
630 | * Dump a transaction into the log that contains no real change. This is needed | |
631 | * to be able to make the log dirty or stamp the current tail LSN into the log | |
632 | * during the covering operation. | |
633 | * | |
634 | * We cannot use an inode here for this - that will push dirty state back up | |
635 | * into the VFS and then periodic inode flushing will prevent log covering from | |
c58efdb4 DC |
636 | * making progress. Hence we log a field in the superblock instead and use a |
637 | * synchronous transaction to ensure the superblock is immediately unpinned | |
638 | * and can be written back. | |
1a387d3b | 639 | */ |
c4be0c1d | 640 | int |
421ad134 | 641 | xfs_fs_log_dummy( |
c58efdb4 | 642 | xfs_mount_t *mp) |
e13a73f0 | 643 | { |
421ad134 | 644 | xfs_trans_t *tp; |
c4be0c1d | 645 | int error; |
e13a73f0 | 646 | |
80641dc6 | 647 | tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1, KM_SLEEP); |
1a387d3b DC |
648 | error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0, |
649 | XFS_DEFAULT_LOG_COUNT); | |
c4be0c1d | 650 | if (error) { |
e13a73f0 | 651 | xfs_trans_cancel(tp, 0); |
c4be0c1d | 652 | return error; |
e13a73f0 CH |
653 | } |
654 | ||
1a387d3b DC |
655 | /* log the UUID because it is an unchanging field */ |
656 | xfs_mod_sb(tp, XFS_SB_UUID); | |
c58efdb4 | 657 | xfs_trans_set_sync(tp); |
1a387d3b | 658 | return xfs_trans_commit(tp, 0); |
e13a73f0 CH |
659 | } |
660 | ||
1da177e4 LT |
661 | int |
662 | xfs_fs_goingdown( | |
663 | xfs_mount_t *mp, | |
664 | __uint32_t inflags) | |
665 | { | |
666 | switch (inflags) { | |
667 | case XFS_FSOP_GOING_FLAGS_DEFAULT: { | |
b267ce99 | 668 | struct super_block *sb = freeze_bdev(mp->m_super->s_bdev); |
1da177e4 | 669 | |
f33c6797 | 670 | if (sb && !IS_ERR(sb)) { |
7d04a335 | 671 | xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); |
1da177e4 LT |
672 | thaw_bdev(sb->s_bdev, sb); |
673 | } | |
189f4bf2 | 674 | |
1da177e4 LT |
675 | break; |
676 | } | |
677 | case XFS_FSOP_GOING_FLAGS_LOGFLUSH: | |
7d04a335 | 678 | xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); |
1da177e4 LT |
679 | break; |
680 | case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH: | |
7d04a335 NS |
681 | xfs_force_shutdown(mp, |
682 | SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR); | |
1da177e4 LT |
683 | break; |
684 | default: | |
685 | return XFS_ERROR(EINVAL); | |
686 | } | |
687 | ||
688 | return 0; | |
689 | } | |
2af51f3a DC |
690 | |
691 | /* | |
692 | * Force a shutdown of the filesystem instantly while keeping the filesystem | |
693 | * consistent. We don't do an unmount here; just shutdown the shop, make sure | |
694 | * that absolutely nothing persistent happens to this filesystem after this | |
695 | * point. | |
696 | */ | |
697 | void | |
698 | xfs_do_force_shutdown( | |
699 | xfs_mount_t *mp, | |
700 | int flags, | |
701 | char *fname, | |
702 | int lnnum) | |
703 | { | |
704 | int logerror; | |
705 | ||
706 | logerror = flags & SHUTDOWN_LOG_IO_ERROR; | |
707 | ||
708 | if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { | |
709 | xfs_notice(mp, | |
710 | "%s(0x%x) called from line %d of file %s. Return address = 0x%p", | |
711 | __func__, flags, lnnum, fname, __return_address); | |
712 | } | |
713 | /* | |
714 | * No need to duplicate efforts. | |
715 | */ | |
716 | if (XFS_FORCED_SHUTDOWN(mp) && !logerror) | |
717 | return; | |
718 | ||
719 | /* | |
720 | * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't | |
721 | * queue up anybody new on the log reservations, and wakes up | |
722 | * everybody who's sleeping on log reservations to tell them | |
723 | * the bad news. | |
724 | */ | |
725 | if (xfs_log_force_umount(mp, logerror)) | |
726 | return; | |
727 | ||
728 | if (flags & SHUTDOWN_CORRUPT_INCORE) { | |
729 | xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT, | |
730 | "Corruption of in-memory data detected. Shutting down filesystem"); | |
731 | if (XFS_ERRLEVEL_HIGH <= xfs_error_level) | |
732 | xfs_stack_trace(); | |
733 | } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { | |
734 | if (logerror) { | |
735 | xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR, | |
736 | "Log I/O Error Detected. Shutting down filesystem"); | |
737 | } else if (flags & SHUTDOWN_DEVICE_REQ) { | |
738 | xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR, | |
739 | "All device paths lost. Shutting down filesystem"); | |
740 | } else if (!(flags & SHUTDOWN_REMOTE_REQ)) { | |
741 | xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR, | |
742 | "I/O Error Detected. Shutting down filesystem"); | |
743 | } | |
744 | } | |
745 | if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { | |
746 | xfs_alert(mp, | |
747 | "Please umount the filesystem and rectify the problem(s)"); | |
748 | } | |
749 | } |