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 = | |
80 | (XFS_SB_VERSION_HASATTR(&mp->m_sb) ? | |
81 | XFS_FSOP_GEOM_FLAGS_ATTR : 0) | | |
82 | (XFS_SB_VERSION_HASNLINK(&mp->m_sb) ? | |
83 | XFS_FSOP_GEOM_FLAGS_NLINK : 0) | | |
84 | (XFS_SB_VERSION_HASQUOTA(&mp->m_sb) ? | |
85 | XFS_FSOP_GEOM_FLAGS_QUOTA : 0) | | |
86 | (XFS_SB_VERSION_HASALIGN(&mp->m_sb) ? | |
87 | XFS_FSOP_GEOM_FLAGS_IALIGN : 0) | | |
88 | (XFS_SB_VERSION_HASDALIGN(&mp->m_sb) ? | |
89 | XFS_FSOP_GEOM_FLAGS_DALIGN : 0) | | |
90 | (XFS_SB_VERSION_HASSHARED(&mp->m_sb) ? | |
91 | XFS_FSOP_GEOM_FLAGS_SHARED : 0) | | |
92 | (XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) ? | |
93 | XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) | | |
94 | (XFS_SB_VERSION_HASDIRV2(&mp->m_sb) ? | |
95 | XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) | | |
96 | (XFS_SB_VERSION_HASSECTOR(&mp->m_sb) ? | |
d8cc890d | 97 | XFS_FSOP_GEOM_FLAGS_SECTOR : 0) | |
92821e2b DC |
98 | (xfs_sb_version_haslazysbcount(&mp->m_sb) ? |
99 | XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) | | |
d8cc890d NS |
100 | (XFS_SB_VERSION_HASATTR2(&mp->m_sb) ? |
101 | XFS_FSOP_GEOM_FLAGS_ATTR2 : 0); | |
1da177e4 LT |
102 | geo->logsectsize = XFS_SB_VERSION_HASSECTOR(&mp->m_sb) ? |
103 | mp->m_sb.sb_logsectsize : BBSIZE; | |
104 | geo->rtsectsize = mp->m_sb.sb_blocksize; | |
105 | geo->dirblocksize = mp->m_dirblksize; | |
106 | } | |
107 | if (new_version >= 4) { | |
108 | geo->flags |= | |
109 | (XFS_SB_VERSION_HASLOGV2(&mp->m_sb) ? | |
110 | XFS_FSOP_GEOM_FLAGS_LOGV2 : 0); | |
111 | geo->logsunit = mp->m_sb.sb_logsunit; | |
112 | } | |
113 | return 0; | |
114 | } | |
115 | ||
116 | static int | |
117 | xfs_growfs_data_private( | |
118 | xfs_mount_t *mp, /* mount point for filesystem */ | |
119 | xfs_growfs_data_t *in) /* growfs data input struct */ | |
120 | { | |
121 | xfs_agf_t *agf; | |
122 | xfs_agi_t *agi; | |
123 | xfs_agnumber_t agno; | |
124 | xfs_extlen_t agsize; | |
125 | xfs_extlen_t tmpsize; | |
126 | xfs_alloc_rec_t *arec; | |
127 | xfs_btree_sblock_t *block; | |
128 | xfs_buf_t *bp; | |
129 | int bucket; | |
130 | int dpct; | |
131 | int error; | |
132 | xfs_agnumber_t nagcount; | |
133 | xfs_agnumber_t nagimax = 0; | |
134 | xfs_rfsblock_t nb, nb_mod; | |
135 | xfs_rfsblock_t new; | |
136 | xfs_rfsblock_t nfree; | |
137 | xfs_agnumber_t oagcount; | |
138 | int pct; | |
139 | xfs_sb_t *sbp; | |
140 | xfs_trans_t *tp; | |
141 | ||
142 | nb = in->newblocks; | |
143 | pct = in->imaxpct; | |
144 | if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100) | |
145 | return XFS_ERROR(EINVAL); | |
4cc929ee NS |
146 | if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb))) |
147 | return error; | |
1da177e4 LT |
148 | dpct = pct - mp->m_sb.sb_imax_pct; |
149 | error = xfs_read_buf(mp, mp->m_ddev_targp, | |
150 | XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1), | |
151 | XFS_FSS_TO_BB(mp, 1), 0, &bp); | |
152 | if (error) | |
153 | return error; | |
154 | ASSERT(bp); | |
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--; | |
162 | nb = nagcount * mp->m_sb.sb_agblocks; | |
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; | |
168 | if (nagcount > oagcount) { | |
2a82b8be | 169 | xfs_filestream_flush(mp); |
1da177e4 LT |
170 | down_write(&mp->m_peraglock); |
171 | mp->m_perag = kmem_realloc(mp->m_perag, | |
172 | sizeof(xfs_perag_t) * nagcount, | |
173 | sizeof(xfs_perag_t) * oagcount, | |
174 | KM_SLEEP); | |
175 | memset(&mp->m_perag[oagcount], 0, | |
176 | (nagcount - oagcount) * sizeof(xfs_perag_t)); | |
177 | mp->m_flags |= XFS_MOUNT_32BITINODES; | |
c11e2c36 | 178 | nagimax = xfs_initialize_perag(XFS_MTOVFS(mp), mp, nagcount); |
1da177e4 LT |
179 | up_write(&mp->m_peraglock); |
180 | } | |
181 | tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS); | |
84e1e99f | 182 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
183 | if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp), |
184 | XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) { | |
185 | xfs_trans_cancel(tp, 0); | |
186 | return error; | |
187 | } | |
188 | ||
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, | |
195 | XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), | |
196 | XFS_FSS_TO_BB(mp, 1), 0); | |
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, | |
227 | XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), | |
228 | XFS_FSS_TO_BB(mp, 1), 0); | |
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, | |
251 | XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), | |
252 | BTOBB(mp->m_sb.sb_blocksize), 0); | |
253 | block = XFS_BUF_TO_SBLOCK(bp); | |
254 | memset(block, 0, mp->m_sb.sb_blocksize); | |
16259e7d | 255 | block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC); |
1da177e4 | 256 | block->bb_level = 0; |
16259e7d CH |
257 | block->bb_numrecs = cpu_to_be16(1); |
258 | block->bb_leftsib = cpu_to_be32(NULLAGBLOCK); | |
259 | block->bb_rightsib = cpu_to_be32(NULLAGBLOCK); | |
2c36dded | 260 | arec = XFS_BTREE_REC_ADDR(xfs_alloc, block, 1); |
16259e7d CH |
261 | arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); |
262 | arec->ar_blockcount = cpu_to_be32( | |
263 | agsize - be32_to_cpu(arec->ar_startblock)); | |
1da177e4 LT |
264 | error = xfs_bwrite(mp, bp); |
265 | if (error) { | |
266 | goto error0; | |
267 | } | |
268 | /* | |
269 | * CNT btree root block | |
270 | */ | |
271 | bp = xfs_buf_get(mp->m_ddev_targp, | |
272 | XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)), | |
273 | BTOBB(mp->m_sb.sb_blocksize), 0); | |
274 | block = XFS_BUF_TO_SBLOCK(bp); | |
275 | memset(block, 0, mp->m_sb.sb_blocksize); | |
16259e7d | 276 | block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC); |
1da177e4 | 277 | block->bb_level = 0; |
16259e7d CH |
278 | block->bb_numrecs = cpu_to_be16(1); |
279 | block->bb_leftsib = cpu_to_be32(NULLAGBLOCK); | |
280 | block->bb_rightsib = cpu_to_be32(NULLAGBLOCK); | |
2c36dded | 281 | arec = XFS_BTREE_REC_ADDR(xfs_alloc, block, 1); |
16259e7d CH |
282 | arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); |
283 | arec->ar_blockcount = cpu_to_be32( | |
284 | agsize - be32_to_cpu(arec->ar_startblock)); | |
285 | nfree += be32_to_cpu(arec->ar_blockcount); | |
1da177e4 LT |
286 | error = xfs_bwrite(mp, bp); |
287 | if (error) { | |
288 | goto error0; | |
289 | } | |
290 | /* | |
291 | * INO btree root block | |
292 | */ | |
293 | bp = xfs_buf_get(mp->m_ddev_targp, | |
294 | XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), | |
295 | BTOBB(mp->m_sb.sb_blocksize), 0); | |
296 | block = XFS_BUF_TO_SBLOCK(bp); | |
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; | |
16259e7d CH |
301 | block->bb_leftsib = cpu_to_be32(NULLAGBLOCK); |
302 | block->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); | |
16259e7d | 322 | be32_add(&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); | |
16259e7d CH |
335 | be32_add(&agf->agf_length, new); |
336 | ASSERT(be32_to_cpu(agf->agf_length) == | |
337 | be32_to_cpu(agi->agi_length)); | |
0164af51 | 338 | xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH); |
1da177e4 LT |
339 | /* |
340 | * Free the new space. | |
341 | */ | |
342 | error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno, | |
16259e7d | 343 | be32_to_cpu(agf->agf_length) - new), new); |
1da177e4 LT |
344 | if (error) { |
345 | goto error0; | |
346 | } | |
347 | } | |
348 | if (nagcount > oagcount) | |
349 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount); | |
350 | if (nb > mp->m_sb.sb_dblocks) | |
351 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, | |
352 | nb - mp->m_sb.sb_dblocks); | |
353 | if (nfree) | |
354 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree); | |
355 | if (dpct) | |
356 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct); | |
1c72bf90 | 357 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
358 | if (error) { |
359 | return error; | |
360 | } | |
361 | /* New allocation groups fully initialized, so update mount struct */ | |
362 | if (nagimax) | |
363 | mp->m_maxagi = nagimax; | |
364 | if (mp->m_sb.sb_imax_pct) { | |
365 | __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct; | |
366 | do_div(icount, 100); | |
367 | mp->m_maxicount = icount << mp->m_sb.sb_inopblog; | |
368 | } else | |
369 | mp->m_maxicount = 0; | |
370 | for (agno = 1; agno < nagcount; agno++) { | |
371 | error = xfs_read_buf(mp, mp->m_ddev_targp, | |
372 | XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
373 | XFS_FSS_TO_BB(mp, 1), 0, &bp); | |
374 | if (error) { | |
375 | xfs_fs_cmn_err(CE_WARN, mp, | |
376 | "error %d reading secondary superblock for ag %d", | |
377 | error, agno); | |
378 | break; | |
379 | } | |
380 | sbp = XFS_BUF_TO_SBP(bp); | |
381 | xfs_xlatesb(sbp, &mp->m_sb, -1, XFS_SB_ALL_BITS); | |
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; | |
438 | if (!cpsema(&mp->m_growlock)) | |
439 | return XFS_ERROR(EWOULDBLOCK); | |
440 | error = xfs_growfs_data_private(mp, in); | |
441 | vsema(&mp->m_growlock); | |
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; | |
451 | if (!cpsema(&mp->m_growlock)) | |
452 | return XFS_ERROR(EWOULDBLOCK); | |
453 | error = xfs_growfs_log_private(mp, in); | |
454 | vsema(&mp->m_growlock); | |
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 | { | |
467 | unsigned long s; | |
468 | ||
dbcabad1 | 469 | xfs_icsb_sync_counters_flags(mp, XFS_ICSB_LAZY_COUNT); |
1da177e4 | 470 | s = XFS_SB_LOCK(mp); |
4be536de | 471 | cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); |
1da177e4 LT |
472 | cnt->freertx = mp->m_sb.sb_frextents; |
473 | cnt->freeino = mp->m_sb.sb_ifree; | |
474 | cnt->allocino = mp->m_sb.sb_icount; | |
475 | XFS_SB_UNLOCK(mp, s); | |
476 | return 0; | |
477 | } | |
478 | ||
479 | /* | |
480 | * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS | |
481 | * | |
482 | * xfs_reserve_blocks is called to set m_resblks | |
483 | * in the in-core mount table. The number of unused reserved blocks | |
c41564b5 | 484 | * is kept in m_resblks_avail. |
1da177e4 LT |
485 | * |
486 | * Reserve the requested number of blocks if available. Otherwise return | |
487 | * as many as possible to satisfy the request. The actual number | |
488 | * reserved are returned in outval | |
489 | * | |
490 | * A null inval pointer indicates that only the current reserved blocks | |
491 | * available should be returned no settings are changed. | |
492 | */ | |
493 | ||
494 | int | |
495 | xfs_reserve_blocks( | |
496 | xfs_mount_t *mp, | |
497 | __uint64_t *inval, | |
498 | xfs_fsop_resblks_t *outval) | |
499 | { | |
dbcabad1 | 500 | __int64_t lcounter, delta, fdblks_delta; |
1da177e4 LT |
501 | __uint64_t request; |
502 | unsigned long s; | |
503 | ||
504 | /* If inval is null, report current values and return */ | |
1da177e4 | 505 | if (inval == (__uint64_t *)NULL) { |
84e1e99f DC |
506 | if (!outval) |
507 | return EINVAL; | |
1da177e4 LT |
508 | outval->resblks = mp->m_resblks; |
509 | outval->resblks_avail = mp->m_resblks_avail; | |
014c2544 | 510 | return 0; |
1da177e4 LT |
511 | } |
512 | ||
513 | request = *inval; | |
dbcabad1 DC |
514 | |
515 | /* | |
516 | * With per-cpu counters, this becomes an interesting | |
517 | * problem. we needto work out if we are freeing or allocation | |
518 | * blocks first, then we can do the modification as necessary. | |
519 | * | |
520 | * We do this under the XFS_SB_LOCK so that if we are near | |
521 | * ENOSPC, we will hold out any changes while we work out | |
522 | * what to do. This means that the amount of free space can | |
523 | * change while we do this, so we need to retry if we end up | |
524 | * trying to reserve more space than is available. | |
525 | * | |
526 | * We also use the xfs_mod_incore_sb() interface so that we | |
527 | * don't have to care about whether per cpu counter are | |
528 | * enabled, disabled or even compiled in.... | |
529 | */ | |
530 | retry: | |
1da177e4 | 531 | s = XFS_SB_LOCK(mp); |
dbcabad1 | 532 | xfs_icsb_sync_counters_flags(mp, XFS_ICSB_SB_LOCKED); |
1da177e4 LT |
533 | |
534 | /* | |
535 | * If our previous reservation was larger than the current value, | |
536 | * then move any unused blocks back to the free pool. | |
537 | */ | |
dbcabad1 | 538 | fdblks_delta = 0; |
1da177e4 LT |
539 | if (mp->m_resblks > request) { |
540 | lcounter = mp->m_resblks_avail - request; | |
541 | if (lcounter > 0) { /* release unused blocks */ | |
dbcabad1 | 542 | fdblks_delta = lcounter; |
1da177e4 LT |
543 | mp->m_resblks_avail -= lcounter; |
544 | } | |
545 | mp->m_resblks = request; | |
546 | } else { | |
4be536de DC |
547 | __int64_t free; |
548 | ||
549 | free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); | |
dbcabad1 DC |
550 | if (!free) |
551 | goto out; /* ENOSPC and fdblks_delta = 0 */ | |
552 | ||
1da177e4 | 553 | delta = request - mp->m_resblks; |
4be536de | 554 | lcounter = free - delta; |
1da177e4 LT |
555 | if (lcounter < 0) { |
556 | /* We can't satisfy the request, just get what we can */ | |
4be536de DC |
557 | mp->m_resblks += free; |
558 | mp->m_resblks_avail += free; | |
dbcabad1 | 559 | fdblks_delta = -free; |
4be536de | 560 | mp->m_sb.sb_fdblocks = XFS_ALLOC_SET_ASIDE(mp); |
1da177e4 | 561 | } else { |
dbcabad1 | 562 | fdblks_delta = -delta; |
4be536de DC |
563 | mp->m_sb.sb_fdblocks = |
564 | lcounter + XFS_ALLOC_SET_ASIDE(mp); | |
1da177e4 LT |
565 | mp->m_resblks = request; |
566 | mp->m_resblks_avail += delta; | |
567 | } | |
568 | } | |
dbcabad1 | 569 | out: |
84e1e99f DC |
570 | if (outval) { |
571 | outval->resblks = mp->m_resblks; | |
572 | outval->resblks_avail = mp->m_resblks_avail; | |
573 | } | |
1da177e4 | 574 | XFS_SB_UNLOCK(mp, s); |
dbcabad1 DC |
575 | |
576 | if (fdblks_delta) { | |
577 | /* | |
578 | * If we are putting blocks back here, m_resblks_avail is | |
579 | * already at it's max so this will put it in the free pool. | |
580 | * | |
581 | * If we need space, we'll either succeed in getting it | |
582 | * from the free block count or we'll get an enospc. If | |
583 | * we get a ENOSPC, it means things changed while we were | |
584 | * calculating fdblks_delta and so we should try again to | |
585 | * see if there is anything left to reserve. | |
586 | * | |
587 | * Don't set the reserved flag here - we don't want to reserve | |
588 | * the extra reserve blocks from the reserve..... | |
589 | */ | |
590 | int error; | |
591 | error = xfs_mod_incore_sb(mp, XFS_SBS_FDBLOCKS, fdblks_delta, 0); | |
592 | if (error == ENOSPC) | |
593 | goto retry; | |
594 | } | |
595 | ||
014c2544 | 596 | return 0; |
1da177e4 LT |
597 | } |
598 | ||
e13a73f0 | 599 | void |
421ad134 NS |
600 | xfs_fs_log_dummy( |
601 | xfs_mount_t *mp) | |
e13a73f0 | 602 | { |
421ad134 NS |
603 | xfs_trans_t *tp; |
604 | xfs_inode_t *ip; | |
e13a73f0 CH |
605 | |
606 | tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1); | |
e13a73f0 CH |
607 | if (xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0)) { |
608 | xfs_trans_cancel(tp, 0); | |
609 | return; | |
610 | } | |
611 | ||
612 | ip = mp->m_rootip; | |
613 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
614 | ||
615 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
616 | xfs_trans_ihold(tp, ip); | |
617 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
618 | xfs_trans_set_sync(tp); | |
1c72bf90 | 619 | xfs_trans_commit(tp, 0); |
e13a73f0 CH |
620 | |
621 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
622 | } | |
623 | ||
1da177e4 LT |
624 | int |
625 | xfs_fs_goingdown( | |
626 | xfs_mount_t *mp, | |
627 | __uint32_t inflags) | |
628 | { | |
629 | switch (inflags) { | |
630 | case XFS_FSOP_GOING_FLAGS_DEFAULT: { | |
b83bd138 | 631 | struct bhv_vfs *vfsp = XFS_MTOVFS(mp); |
1da177e4 LT |
632 | struct super_block *sb = freeze_bdev(vfsp->vfs_super->s_bdev); |
633 | ||
f33c6797 | 634 | if (sb && !IS_ERR(sb)) { |
7d04a335 | 635 | xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); |
1da177e4 LT |
636 | thaw_bdev(sb->s_bdev, sb); |
637 | } | |
638 | ||
639 | break; | |
640 | } | |
641 | case XFS_FSOP_GOING_FLAGS_LOGFLUSH: | |
7d04a335 | 642 | xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); |
1da177e4 LT |
643 | break; |
644 | case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH: | |
7d04a335 NS |
645 | xfs_force_shutdown(mp, |
646 | SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR); | |
1da177e4 LT |
647 | break; |
648 | default: | |
649 | return XFS_ERROR(EINVAL); | |
650 | } | |
651 | ||
652 | return 0; | |
653 | } |