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" |
a844f451 | 27 | #include "xfs_dir2.h" |
1da177e4 LT |
28 | #include "xfs_dmapi.h" |
29 | #include "xfs_mount.h" | |
1da177e4 | 30 | #include "xfs_bmap_btree.h" |
a844f451 | 31 | #include "xfs_alloc_btree.h" |
1da177e4 | 32 | #include "xfs_ialloc_btree.h" |
a844f451 NS |
33 | #include "xfs_dir2_sf.h" |
34 | #include "xfs_attr_sf.h" | |
35 | #include "xfs_dinode.h" | |
36 | #include "xfs_inode.h" | |
37 | #include "xfs_inode_item.h" | |
1da177e4 LT |
38 | #include "xfs_btree.h" |
39 | #include "xfs_error.h" | |
40 | #include "xfs_alloc.h" | |
41 | #include "xfs_ialloc.h" | |
42 | #include "xfs_fsops.h" | |
43 | #include "xfs_itable.h" | |
1da177e4 LT |
44 | #include "xfs_trans_space.h" |
45 | #include "xfs_rtalloc.h" | |
a844f451 | 46 | #include "xfs_rw.h" |
2a82b8be | 47 | #include "xfs_filestream.h" |
1da177e4 LT |
48 | |
49 | /* | |
50 | * File system operations | |
51 | */ | |
52 | ||
53 | int | |
54 | xfs_fs_geometry( | |
55 | xfs_mount_t *mp, | |
56 | xfs_fsop_geom_t *geo, | |
57 | int new_version) | |
58 | { | |
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; | |
129 | xfs_btree_sblock_t *block; | |
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 LT |
149 | dpct = pct - mp->m_sb.sb_imax_pct; |
150 | error = xfs_read_buf(mp, mp->m_ddev_targp, | |
151 | XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1), | |
152 | XFS_FSS_TO_BB(mp, 1), 0, &bp); | |
153 | if (error) | |
154 | return error; | |
155 | ASSERT(bp); | |
156 | xfs_buf_relse(bp); | |
157 | ||
158 | new = nb; /* use new as a temporary here */ | |
159 | nb_mod = do_div(new, mp->m_sb.sb_agblocks); | |
160 | nagcount = new + (nb_mod != 0); | |
161 | if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) { | |
162 | nagcount--; | |
163 | nb = nagcount * mp->m_sb.sb_agblocks; | |
164 | if (nb < mp->m_sb.sb_dblocks) | |
165 | return XFS_ERROR(EINVAL); | |
166 | } | |
167 | new = nb - mp->m_sb.sb_dblocks; | |
168 | oagcount = mp->m_sb.sb_agcount; | |
169 | if (nagcount > oagcount) { | |
2a82b8be | 170 | xfs_filestream_flush(mp); |
1da177e4 LT |
171 | down_write(&mp->m_peraglock); |
172 | mp->m_perag = kmem_realloc(mp->m_perag, | |
173 | sizeof(xfs_perag_t) * nagcount, | |
174 | sizeof(xfs_perag_t) * oagcount, | |
175 | KM_SLEEP); | |
176 | memset(&mp->m_perag[oagcount], 0, | |
177 | (nagcount - oagcount) * sizeof(xfs_perag_t)); | |
178 | mp->m_flags |= XFS_MOUNT_32BITINODES; | |
b267ce99 | 179 | nagimax = xfs_initialize_perag(mp, nagcount); |
1da177e4 LT |
180 | up_write(&mp->m_peraglock); |
181 | } | |
182 | tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS); | |
84e1e99f | 183 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
184 | if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp), |
185 | XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) { | |
186 | xfs_trans_cancel(tp, 0); | |
187 | return error; | |
188 | } | |
189 | ||
190 | nfree = 0; | |
191 | for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) { | |
192 | /* | |
193 | * AG freelist header block | |
194 | */ | |
195 | bp = xfs_buf_get(mp->m_ddev_targp, | |
196 | XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), | |
197 | XFS_FSS_TO_BB(mp, 1), 0); | |
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); | |
1da177e4 LT |
220 | error = xfs_bwrite(mp, bp); |
221 | if (error) { | |
222 | goto error0; | |
223 | } | |
224 | /* | |
225 | * AG inode header block | |
226 | */ | |
227 | bp = xfs_buf_get(mp->m_ddev_targp, | |
228 | XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), | |
229 | XFS_FSS_TO_BB(mp, 1), 0); | |
230 | agi = XFS_BUF_TO_AGI(bp); | |
231 | memset(agi, 0, mp->m_sb.sb_sectsize); | |
16259e7d CH |
232 | agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC); |
233 | agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION); | |
234 | agi->agi_seqno = cpu_to_be32(agno); | |
235 | agi->agi_length = cpu_to_be32(agsize); | |
1da177e4 | 236 | agi->agi_count = 0; |
16259e7d CH |
237 | agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp)); |
238 | agi->agi_level = cpu_to_be32(1); | |
1da177e4 | 239 | agi->agi_freecount = 0; |
16259e7d CH |
240 | agi->agi_newino = cpu_to_be32(NULLAGINO); |
241 | agi->agi_dirino = cpu_to_be32(NULLAGINO); | |
1da177e4 | 242 | for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) |
16259e7d | 243 | agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); |
1da177e4 LT |
244 | error = xfs_bwrite(mp, bp); |
245 | if (error) { | |
246 | goto error0; | |
247 | } | |
248 | /* | |
249 | * BNO btree root block | |
250 | */ | |
251 | bp = xfs_buf_get(mp->m_ddev_targp, | |
252 | XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), | |
253 | BTOBB(mp->m_sb.sb_blocksize), 0); | |
254 | block = XFS_BUF_TO_SBLOCK(bp); | |
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 CH |
258 | block->bb_numrecs = cpu_to_be16(1); |
259 | block->bb_leftsib = cpu_to_be32(NULLAGBLOCK); | |
260 | block->bb_rightsib = cpu_to_be32(NULLAGBLOCK); | |
2c36dded | 261 | arec = XFS_BTREE_REC_ADDR(xfs_alloc, 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, | |
273 | XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)), | |
274 | BTOBB(mp->m_sb.sb_blocksize), 0); | |
275 | block = XFS_BUF_TO_SBLOCK(bp); | |
276 | memset(block, 0, mp->m_sb.sb_blocksize); | |
16259e7d | 277 | block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC); |
1da177e4 | 278 | block->bb_level = 0; |
16259e7d CH |
279 | block->bb_numrecs = cpu_to_be16(1); |
280 | block->bb_leftsib = cpu_to_be32(NULLAGBLOCK); | |
281 | block->bb_rightsib = cpu_to_be32(NULLAGBLOCK); | |
2c36dded | 282 | arec = XFS_BTREE_REC_ADDR(xfs_alloc, block, 1); |
16259e7d CH |
283 | arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); |
284 | arec->ar_blockcount = cpu_to_be32( | |
285 | agsize - be32_to_cpu(arec->ar_startblock)); | |
286 | nfree += be32_to_cpu(arec->ar_blockcount); | |
1da177e4 LT |
287 | error = xfs_bwrite(mp, bp); |
288 | if (error) { | |
289 | goto error0; | |
290 | } | |
291 | /* | |
292 | * INO btree root block | |
293 | */ | |
294 | bp = xfs_buf_get(mp->m_ddev_targp, | |
295 | XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), | |
296 | BTOBB(mp->m_sb.sb_blocksize), 0); | |
297 | block = XFS_BUF_TO_SBLOCK(bp); | |
298 | memset(block, 0, mp->m_sb.sb_blocksize); | |
16259e7d | 299 | block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC); |
1da177e4 LT |
300 | block->bb_level = 0; |
301 | block->bb_numrecs = 0; | |
16259e7d CH |
302 | block->bb_leftsib = cpu_to_be32(NULLAGBLOCK); |
303 | block->bb_rightsib = cpu_to_be32(NULLAGBLOCK); | |
1da177e4 LT |
304 | error = xfs_bwrite(mp, bp); |
305 | if (error) { | |
306 | goto error0; | |
307 | } | |
308 | } | |
309 | xfs_trans_agblocks_delta(tp, nfree); | |
310 | /* | |
311 | * There are new blocks in the old last a.g. | |
312 | */ | |
313 | if (new) { | |
314 | /* | |
315 | * Change the agi length. | |
316 | */ | |
317 | error = xfs_ialloc_read_agi(mp, tp, agno, &bp); | |
318 | if (error) { | |
319 | goto error0; | |
320 | } | |
321 | ASSERT(bp); | |
322 | agi = XFS_BUF_TO_AGI(bp); | |
413d57c9 | 323 | be32_add_cpu(&agi->agi_length, new); |
1da177e4 | 324 | ASSERT(nagcount == oagcount || |
16259e7d | 325 | be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks); |
1da177e4 LT |
326 | xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH); |
327 | /* | |
328 | * Change agf length. | |
329 | */ | |
330 | error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp); | |
331 | if (error) { | |
332 | goto error0; | |
333 | } | |
334 | ASSERT(bp); | |
335 | agf = XFS_BUF_TO_AGF(bp); | |
413d57c9 | 336 | be32_add_cpu(&agf->agf_length, new); |
16259e7d CH |
337 | ASSERT(be32_to_cpu(agf->agf_length) == |
338 | be32_to_cpu(agi->agi_length)); | |
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 | } | |
349 | if (nagcount > oagcount) | |
350 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount); | |
351 | if (nb > mp->m_sb.sb_dblocks) | |
352 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, | |
353 | nb - mp->m_sb.sb_dblocks); | |
354 | if (nfree) | |
355 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree); | |
356 | if (dpct) | |
357 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct); | |
1c72bf90 | 358 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
359 | if (error) { |
360 | return error; | |
361 | } | |
362 | /* New allocation groups fully initialized, so update mount struct */ | |
363 | if (nagimax) | |
364 | mp->m_maxagi = nagimax; | |
365 | if (mp->m_sb.sb_imax_pct) { | |
366 | __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct; | |
367 | do_div(icount, 100); | |
368 | mp->m_maxicount = icount << mp->m_sb.sb_inopblog; | |
369 | } else | |
370 | mp->m_maxicount = 0; | |
371 | for (agno = 1; agno < nagcount; agno++) { | |
372 | error = xfs_read_buf(mp, mp->m_ddev_targp, | |
373 | XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
374 | XFS_FSS_TO_BB(mp, 1), 0, &bp); | |
375 | if (error) { | |
376 | xfs_fs_cmn_err(CE_WARN, mp, | |
377 | "error %d reading secondary superblock for ag %d", | |
378 | error, agno); | |
379 | break; | |
380 | } | |
2bdf7cd0 | 381 | xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS); |
1da177e4 LT |
382 | /* |
383 | * If we get an error writing out the alternate superblocks, | |
384 | * just issue a warning and continue. The real work is | |
385 | * already done and committed. | |
386 | */ | |
387 | if (!(error = xfs_bwrite(mp, bp))) { | |
388 | continue; | |
389 | } else { | |
390 | xfs_fs_cmn_err(CE_WARN, mp, | |
391 | "write error %d updating secondary superblock for ag %d", | |
392 | error, agno); | |
393 | break; /* no point in continuing */ | |
394 | } | |
395 | } | |
396 | return 0; | |
397 | ||
398 | error0: | |
399 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); | |
400 | return error; | |
401 | } | |
402 | ||
403 | static int | |
404 | xfs_growfs_log_private( | |
405 | xfs_mount_t *mp, /* mount point for filesystem */ | |
406 | xfs_growfs_log_t *in) /* growfs log input struct */ | |
407 | { | |
408 | xfs_extlen_t nb; | |
409 | ||
410 | nb = in->newblocks; | |
411 | if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES)) | |
412 | return XFS_ERROR(EINVAL); | |
413 | if (nb == mp->m_sb.sb_logblocks && | |
414 | in->isint == (mp->m_sb.sb_logstart != 0)) | |
415 | return XFS_ERROR(EINVAL); | |
416 | /* | |
417 | * Moving the log is hard, need new interfaces to sync | |
418 | * the log first, hold off all activity while moving it. | |
419 | * Can have shorter or longer log in the same space, | |
420 | * or transform internal to external log or vice versa. | |
421 | */ | |
422 | return XFS_ERROR(ENOSYS); | |
423 | } | |
424 | ||
425 | /* | |
426 | * protected versions of growfs function acquire and release locks on the mount | |
427 | * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG, | |
428 | * XFS_IOC_FSGROWFSRT | |
429 | */ | |
430 | ||
431 | ||
432 | int | |
433 | xfs_growfs_data( | |
434 | xfs_mount_t *mp, | |
435 | xfs_growfs_data_t *in) | |
436 | { | |
437 | int error; | |
cc92e7ac | 438 | if (!mutex_trylock(&mp->m_growlock)) |
1da177e4 LT |
439 | return XFS_ERROR(EWOULDBLOCK); |
440 | error = xfs_growfs_data_private(mp, in); | |
cc92e7ac | 441 | mutex_unlock(&mp->m_growlock); |
1da177e4 LT |
442 | return error; |
443 | } | |
444 | ||
445 | int | |
446 | xfs_growfs_log( | |
447 | xfs_mount_t *mp, | |
448 | xfs_growfs_log_t *in) | |
449 | { | |
450 | int error; | |
cc92e7ac | 451 | if (!mutex_trylock(&mp->m_growlock)) |
1da177e4 LT |
452 | return XFS_ERROR(EWOULDBLOCK); |
453 | error = xfs_growfs_log_private(mp, in); | |
cc92e7ac | 454 | mutex_unlock(&mp->m_growlock); |
1da177e4 LT |
455 | return error; |
456 | } | |
457 | ||
458 | /* | |
459 | * exported through ioctl XFS_IOC_FSCOUNTS | |
460 | */ | |
461 | ||
462 | int | |
463 | xfs_fs_counts( | |
464 | xfs_mount_t *mp, | |
465 | xfs_fsop_counts_t *cnt) | |
466 | { | |
d4d90b57 | 467 | xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); |
3685c2a1 | 468 | spin_lock(&mp->m_sb_lock); |
4be536de | 469 | cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); |
1da177e4 LT |
470 | cnt->freertx = mp->m_sb.sb_frextents; |
471 | cnt->freeino = mp->m_sb.sb_ifree; | |
472 | cnt->allocino = mp->m_sb.sb_icount; | |
3685c2a1 | 473 | spin_unlock(&mp->m_sb_lock); |
1da177e4 LT |
474 | return 0; |
475 | } | |
476 | ||
477 | /* | |
478 | * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS | |
479 | * | |
480 | * xfs_reserve_blocks is called to set m_resblks | |
481 | * in the in-core mount table. The number of unused reserved blocks | |
c41564b5 | 482 | * is kept in m_resblks_avail. |
1da177e4 LT |
483 | * |
484 | * Reserve the requested number of blocks if available. Otherwise return | |
485 | * as many as possible to satisfy the request. The actual number | |
486 | * reserved are returned in outval | |
487 | * | |
488 | * A null inval pointer indicates that only the current reserved blocks | |
489 | * available should be returned no settings are changed. | |
490 | */ | |
491 | ||
492 | int | |
493 | xfs_reserve_blocks( | |
494 | xfs_mount_t *mp, | |
495 | __uint64_t *inval, | |
496 | xfs_fsop_resblks_t *outval) | |
497 | { | |
dbcabad1 | 498 | __int64_t lcounter, delta, fdblks_delta; |
1da177e4 | 499 | __uint64_t request; |
1da177e4 LT |
500 | |
501 | /* If inval is null, report current values and return */ | |
1da177e4 | 502 | if (inval == (__uint64_t *)NULL) { |
84e1e99f DC |
503 | if (!outval) |
504 | return EINVAL; | |
1da177e4 LT |
505 | outval->resblks = mp->m_resblks; |
506 | outval->resblks_avail = mp->m_resblks_avail; | |
014c2544 | 507 | return 0; |
1da177e4 LT |
508 | } |
509 | ||
510 | request = *inval; | |
dbcabad1 DC |
511 | |
512 | /* | |
513 | * With per-cpu counters, this becomes an interesting | |
514 | * problem. we needto work out if we are freeing or allocation | |
515 | * blocks first, then we can do the modification as necessary. | |
516 | * | |
3685c2a1 | 517 | * We do this under the m_sb_lock so that if we are near |
dbcabad1 DC |
518 | * ENOSPC, we will hold out any changes while we work out |
519 | * what to do. This means that the amount of free space can | |
520 | * change while we do this, so we need to retry if we end up | |
521 | * trying to reserve more space than is available. | |
522 | * | |
523 | * We also use the xfs_mod_incore_sb() interface so that we | |
524 | * don't have to care about whether per cpu counter are | |
525 | * enabled, disabled or even compiled in.... | |
526 | */ | |
527 | retry: | |
3685c2a1 | 528 | spin_lock(&mp->m_sb_lock); |
d4d90b57 | 529 | xfs_icsb_sync_counters_locked(mp, 0); |
1da177e4 LT |
530 | |
531 | /* | |
532 | * If our previous reservation was larger than the current value, | |
533 | * then move any unused blocks back to the free pool. | |
534 | */ | |
dbcabad1 | 535 | fdblks_delta = 0; |
1da177e4 LT |
536 | if (mp->m_resblks > request) { |
537 | lcounter = mp->m_resblks_avail - request; | |
538 | if (lcounter > 0) { /* release unused blocks */ | |
dbcabad1 | 539 | fdblks_delta = lcounter; |
1da177e4 LT |
540 | mp->m_resblks_avail -= lcounter; |
541 | } | |
542 | mp->m_resblks = request; | |
543 | } else { | |
4be536de DC |
544 | __int64_t free; |
545 | ||
546 | free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); | |
dbcabad1 DC |
547 | if (!free) |
548 | goto out; /* ENOSPC and fdblks_delta = 0 */ | |
549 | ||
1da177e4 | 550 | delta = request - mp->m_resblks; |
4be536de | 551 | lcounter = free - delta; |
1da177e4 LT |
552 | if (lcounter < 0) { |
553 | /* We can't satisfy the request, just get what we can */ | |
4be536de DC |
554 | mp->m_resblks += free; |
555 | mp->m_resblks_avail += free; | |
dbcabad1 | 556 | fdblks_delta = -free; |
1da177e4 | 557 | } else { |
dbcabad1 | 558 | fdblks_delta = -delta; |
1da177e4 LT |
559 | mp->m_resblks = request; |
560 | mp->m_resblks_avail += delta; | |
561 | } | |
562 | } | |
dbcabad1 | 563 | out: |
84e1e99f DC |
564 | if (outval) { |
565 | outval->resblks = mp->m_resblks; | |
566 | outval->resblks_avail = mp->m_resblks_avail; | |
567 | } | |
3685c2a1 | 568 | spin_unlock(&mp->m_sb_lock); |
dbcabad1 DC |
569 | |
570 | if (fdblks_delta) { | |
571 | /* | |
572 | * If we are putting blocks back here, m_resblks_avail is | |
573 | * already at it's max so this will put it in the free pool. | |
574 | * | |
575 | * If we need space, we'll either succeed in getting it | |
576 | * from the free block count or we'll get an enospc. If | |
577 | * we get a ENOSPC, it means things changed while we were | |
578 | * calculating fdblks_delta and so we should try again to | |
579 | * see if there is anything left to reserve. | |
580 | * | |
581 | * Don't set the reserved flag here - we don't want to reserve | |
582 | * the extra reserve blocks from the reserve..... | |
583 | */ | |
584 | int error; | |
585 | error = xfs_mod_incore_sb(mp, XFS_SBS_FDBLOCKS, fdblks_delta, 0); | |
586 | if (error == ENOSPC) | |
587 | goto retry; | |
588 | } | |
014c2544 | 589 | return 0; |
1da177e4 LT |
590 | } |
591 | ||
e13a73f0 | 592 | void |
421ad134 NS |
593 | xfs_fs_log_dummy( |
594 | xfs_mount_t *mp) | |
e13a73f0 | 595 | { |
421ad134 NS |
596 | xfs_trans_t *tp; |
597 | xfs_inode_t *ip; | |
e13a73f0 CH |
598 | |
599 | tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1); | |
e13a73f0 CH |
600 | if (xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0)) { |
601 | xfs_trans_cancel(tp, 0); | |
602 | return; | |
603 | } | |
604 | ||
605 | ip = mp->m_rootip; | |
606 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
607 | ||
608 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
609 | xfs_trans_ihold(tp, ip); | |
610 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
611 | xfs_trans_set_sync(tp); | |
1c72bf90 | 612 | xfs_trans_commit(tp, 0); |
e13a73f0 CH |
613 | |
614 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
615 | } | |
616 | ||
1da177e4 LT |
617 | int |
618 | xfs_fs_goingdown( | |
619 | xfs_mount_t *mp, | |
620 | __uint32_t inflags) | |
621 | { | |
622 | switch (inflags) { | |
623 | case XFS_FSOP_GOING_FLAGS_DEFAULT: { | |
b267ce99 | 624 | struct super_block *sb = freeze_bdev(mp->m_super->s_bdev); |
1da177e4 | 625 | |
f33c6797 | 626 | if (sb && !IS_ERR(sb)) { |
7d04a335 | 627 | xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); |
1da177e4 LT |
628 | thaw_bdev(sb->s_bdev, sb); |
629 | } | |
189f4bf2 | 630 | |
1da177e4 LT |
631 | break; |
632 | } | |
633 | case XFS_FSOP_GOING_FLAGS_LOGFLUSH: | |
7d04a335 | 634 | xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); |
1da177e4 LT |
635 | break; |
636 | case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH: | |
7d04a335 NS |
637 | xfs_force_shutdown(mp, |
638 | SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR); | |
1da177e4 LT |
639 | break; |
640 | default: | |
641 | return XFS_ERROR(EINVAL); | |
642 | } | |
643 | ||
644 | return 0; | |
645 | } |