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" |
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_dir.h" |
a844f451 | 28 | #include "xfs_dir2.h" |
1da177e4 LT |
29 | #include "xfs_dmapi.h" |
30 | #include "xfs_mount.h" | |
1da177e4 | 31 | #include "xfs_bmap_btree.h" |
a844f451 | 32 | #include "xfs_alloc_btree.h" |
1da177e4 | 33 | #include "xfs_ialloc_btree.h" |
a844f451 NS |
34 | #include "xfs_dir_sf.h" |
35 | #include "xfs_dir2_sf.h" | |
36 | #include "xfs_attr_sf.h" | |
37 | #include "xfs_dinode.h" | |
38 | #include "xfs_inode.h" | |
39 | #include "xfs_inode_item.h" | |
1da177e4 LT |
40 | #include "xfs_btree.h" |
41 | #include "xfs_error.h" | |
42 | #include "xfs_alloc.h" | |
43 | #include "xfs_ialloc.h" | |
44 | #include "xfs_fsops.h" | |
45 | #include "xfs_itable.h" | |
1da177e4 LT |
46 | #include "xfs_trans_space.h" |
47 | #include "xfs_rtalloc.h" | |
a844f451 | 48 | #include "xfs_rw.h" |
1da177e4 LT |
49 | |
50 | /* | |
51 | * File system operations | |
52 | */ | |
53 | ||
54 | int | |
55 | xfs_fs_geometry( | |
56 | xfs_mount_t *mp, | |
57 | xfs_fsop_geom_t *geo, | |
58 | int new_version) | |
59 | { | |
60 | geo->blocksize = mp->m_sb.sb_blocksize; | |
61 | geo->rtextsize = mp->m_sb.sb_rextsize; | |
62 | geo->agblocks = mp->m_sb.sb_agblocks; | |
63 | geo->agcount = mp->m_sb.sb_agcount; | |
64 | geo->logblocks = mp->m_sb.sb_logblocks; | |
65 | geo->sectsize = mp->m_sb.sb_sectsize; | |
66 | geo->inodesize = mp->m_sb.sb_inodesize; | |
67 | geo->imaxpct = mp->m_sb.sb_imax_pct; | |
68 | geo->datablocks = mp->m_sb.sb_dblocks; | |
69 | geo->rtblocks = mp->m_sb.sb_rblocks; | |
70 | geo->rtextents = mp->m_sb.sb_rextents; | |
71 | geo->logstart = mp->m_sb.sb_logstart; | |
72 | ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid)); | |
73 | memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid)); | |
74 | if (new_version >= 2) { | |
75 | geo->sunit = mp->m_sb.sb_unit; | |
76 | geo->swidth = mp->m_sb.sb_width; | |
77 | } | |
78 | if (new_version >= 3) { | |
79 | geo->version = XFS_FSOP_GEOM_VERSION; | |
80 | geo->flags = | |
81 | (XFS_SB_VERSION_HASATTR(&mp->m_sb) ? | |
82 | XFS_FSOP_GEOM_FLAGS_ATTR : 0) | | |
83 | (XFS_SB_VERSION_HASNLINK(&mp->m_sb) ? | |
84 | XFS_FSOP_GEOM_FLAGS_NLINK : 0) | | |
85 | (XFS_SB_VERSION_HASQUOTA(&mp->m_sb) ? | |
86 | XFS_FSOP_GEOM_FLAGS_QUOTA : 0) | | |
87 | (XFS_SB_VERSION_HASALIGN(&mp->m_sb) ? | |
88 | XFS_FSOP_GEOM_FLAGS_IALIGN : 0) | | |
89 | (XFS_SB_VERSION_HASDALIGN(&mp->m_sb) ? | |
90 | XFS_FSOP_GEOM_FLAGS_DALIGN : 0) | | |
91 | (XFS_SB_VERSION_HASSHARED(&mp->m_sb) ? | |
92 | XFS_FSOP_GEOM_FLAGS_SHARED : 0) | | |
93 | (XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) ? | |
94 | XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) | | |
95 | (XFS_SB_VERSION_HASDIRV2(&mp->m_sb) ? | |
96 | XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) | | |
97 | (XFS_SB_VERSION_HASSECTOR(&mp->m_sb) ? | |
d8cc890d NS |
98 | XFS_FSOP_GEOM_FLAGS_SECTOR : 0) | |
99 | (XFS_SB_VERSION_HASATTR2(&mp->m_sb) ? | |
100 | XFS_FSOP_GEOM_FLAGS_ATTR2 : 0); | |
1da177e4 LT |
101 | geo->logsectsize = XFS_SB_VERSION_HASSECTOR(&mp->m_sb) ? |
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 |= | |
108 | (XFS_SB_VERSION_HASLOGV2(&mp->m_sb) ? | |
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; | |
126 | xfs_btree_sblock_t *block; | |
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; | |
138 | xfs_sb_t *sbp; | |
139 | xfs_trans_t *tp; | |
140 | ||
141 | nb = in->newblocks; | |
142 | pct = in->imaxpct; | |
143 | if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100) | |
144 | return XFS_ERROR(EINVAL); | |
145 | dpct = pct - mp->m_sb.sb_imax_pct; | |
146 | error = xfs_read_buf(mp, mp->m_ddev_targp, | |
147 | XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1), | |
148 | XFS_FSS_TO_BB(mp, 1), 0, &bp); | |
149 | if (error) | |
150 | return error; | |
151 | ASSERT(bp); | |
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--; | |
159 | nb = nagcount * mp->m_sb.sb_agblocks; | |
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; | |
165 | if (nagcount > oagcount) { | |
166 | down_write(&mp->m_peraglock); | |
167 | mp->m_perag = kmem_realloc(mp->m_perag, | |
168 | sizeof(xfs_perag_t) * nagcount, | |
169 | sizeof(xfs_perag_t) * oagcount, | |
170 | KM_SLEEP); | |
171 | memset(&mp->m_perag[oagcount], 0, | |
172 | (nagcount - oagcount) * sizeof(xfs_perag_t)); | |
173 | mp->m_flags |= XFS_MOUNT_32BITINODES; | |
174 | nagimax = xfs_initialize_perag(mp, nagcount); | |
175 | up_write(&mp->m_peraglock); | |
176 | } | |
177 | tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS); | |
178 | if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp), | |
179 | XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) { | |
180 | xfs_trans_cancel(tp, 0); | |
181 | return error; | |
182 | } | |
183 | ||
184 | nfree = 0; | |
185 | for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) { | |
186 | /* | |
187 | * AG freelist header block | |
188 | */ | |
189 | bp = xfs_buf_get(mp->m_ddev_targp, | |
190 | XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), | |
191 | XFS_FSS_TO_BB(mp, 1), 0); | |
192 | agf = XFS_BUF_TO_AGF(bp); | |
193 | memset(agf, 0, mp->m_sb.sb_sectsize); | |
194 | INT_SET(agf->agf_magicnum, ARCH_CONVERT, XFS_AGF_MAGIC); | |
195 | INT_SET(agf->agf_versionnum, ARCH_CONVERT, XFS_AGF_VERSION); | |
196 | INT_SET(agf->agf_seqno, ARCH_CONVERT, agno); | |
197 | if (agno == nagcount - 1) | |
198 | agsize = | |
199 | nb - | |
200 | (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks); | |
201 | else | |
202 | agsize = mp->m_sb.sb_agblocks; | |
203 | INT_SET(agf->agf_length, ARCH_CONVERT, agsize); | |
204 | INT_SET(agf->agf_roots[XFS_BTNUM_BNOi], ARCH_CONVERT, | |
205 | XFS_BNO_BLOCK(mp)); | |
206 | INT_SET(agf->agf_roots[XFS_BTNUM_CNTi], ARCH_CONVERT, | |
207 | XFS_CNT_BLOCK(mp)); | |
208 | INT_SET(agf->agf_levels[XFS_BTNUM_BNOi], ARCH_CONVERT, 1); | |
209 | INT_SET(agf->agf_levels[XFS_BTNUM_CNTi], ARCH_CONVERT, 1); | |
210 | agf->agf_flfirst = 0; | |
211 | INT_SET(agf->agf_fllast, ARCH_CONVERT, XFS_AGFL_SIZE(mp) - 1); | |
212 | agf->agf_flcount = 0; | |
213 | tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp); | |
214 | INT_SET(agf->agf_freeblks, ARCH_CONVERT, tmpsize); | |
215 | INT_SET(agf->agf_longest, ARCH_CONVERT, tmpsize); | |
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, | |
224 | XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), | |
225 | XFS_FSS_TO_BB(mp, 1), 0); | |
226 | agi = XFS_BUF_TO_AGI(bp); | |
227 | memset(agi, 0, mp->m_sb.sb_sectsize); | |
228 | INT_SET(agi->agi_magicnum, ARCH_CONVERT, XFS_AGI_MAGIC); | |
229 | INT_SET(agi->agi_versionnum, ARCH_CONVERT, XFS_AGI_VERSION); | |
230 | INT_SET(agi->agi_seqno, ARCH_CONVERT, agno); | |
231 | INT_SET(agi->agi_length, ARCH_CONVERT, agsize); | |
232 | agi->agi_count = 0; | |
233 | INT_SET(agi->agi_root, ARCH_CONVERT, XFS_IBT_BLOCK(mp)); | |
234 | INT_SET(agi->agi_level, ARCH_CONVERT, 1); | |
235 | agi->agi_freecount = 0; | |
236 | INT_SET(agi->agi_newino, ARCH_CONVERT, NULLAGINO); | |
237 | INT_SET(agi->agi_dirino, ARCH_CONVERT, NULLAGINO); | |
238 | for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) | |
239 | INT_SET(agi->agi_unlinked[bucket], ARCH_CONVERT, | |
240 | NULLAGINO); | |
241 | error = xfs_bwrite(mp, bp); | |
242 | if (error) { | |
243 | goto error0; | |
244 | } | |
245 | /* | |
246 | * BNO btree root block | |
247 | */ | |
248 | bp = xfs_buf_get(mp->m_ddev_targp, | |
249 | XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), | |
250 | BTOBB(mp->m_sb.sb_blocksize), 0); | |
251 | block = XFS_BUF_TO_SBLOCK(bp); | |
252 | memset(block, 0, mp->m_sb.sb_blocksize); | |
253 | INT_SET(block->bb_magic, ARCH_CONVERT, XFS_ABTB_MAGIC); | |
254 | block->bb_level = 0; | |
255 | INT_SET(block->bb_numrecs, ARCH_CONVERT, 1); | |
256 | INT_SET(block->bb_leftsib, ARCH_CONVERT, NULLAGBLOCK); | |
257 | INT_SET(block->bb_rightsib, ARCH_CONVERT, NULLAGBLOCK); | |
258 | arec = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, xfs_alloc, | |
259 | block, 1, mp->m_alloc_mxr[0]); | |
260 | INT_SET(arec->ar_startblock, ARCH_CONVERT, | |
261 | XFS_PREALLOC_BLOCKS(mp)); | |
262 | INT_SET(arec->ar_blockcount, ARCH_CONVERT, | |
263 | agsize - INT_GET(arec->ar_startblock, ARCH_CONVERT)); | |
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); | |
276 | INT_SET(block->bb_magic, ARCH_CONVERT, XFS_ABTC_MAGIC); | |
277 | block->bb_level = 0; | |
278 | INT_SET(block->bb_numrecs, ARCH_CONVERT, 1); | |
279 | INT_SET(block->bb_leftsib, ARCH_CONVERT, NULLAGBLOCK); | |
280 | INT_SET(block->bb_rightsib, ARCH_CONVERT, NULLAGBLOCK); | |
281 | arec = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, xfs_alloc, | |
282 | block, 1, mp->m_alloc_mxr[0]); | |
283 | INT_SET(arec->ar_startblock, ARCH_CONVERT, | |
284 | XFS_PREALLOC_BLOCKS(mp)); | |
285 | INT_SET(arec->ar_blockcount, ARCH_CONVERT, | |
286 | agsize - INT_GET(arec->ar_startblock, ARCH_CONVERT)); | |
287 | nfree += INT_GET(arec->ar_blockcount, ARCH_CONVERT); | |
288 | error = xfs_bwrite(mp, bp); | |
289 | if (error) { | |
290 | goto error0; | |
291 | } | |
292 | /* | |
293 | * INO btree root block | |
294 | */ | |
295 | bp = xfs_buf_get(mp->m_ddev_targp, | |
296 | XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), | |
297 | BTOBB(mp->m_sb.sb_blocksize), 0); | |
298 | block = XFS_BUF_TO_SBLOCK(bp); | |
299 | memset(block, 0, mp->m_sb.sb_blocksize); | |
300 | INT_SET(block->bb_magic, ARCH_CONVERT, XFS_IBT_MAGIC); | |
301 | block->bb_level = 0; | |
302 | block->bb_numrecs = 0; | |
303 | INT_SET(block->bb_leftsib, ARCH_CONVERT, NULLAGBLOCK); | |
304 | INT_SET(block->bb_rightsib, ARCH_CONVERT, NULLAGBLOCK); | |
305 | error = xfs_bwrite(mp, bp); | |
306 | if (error) { | |
307 | goto error0; | |
308 | } | |
309 | } | |
310 | xfs_trans_agblocks_delta(tp, nfree); | |
311 | /* | |
312 | * There are new blocks in the old last a.g. | |
313 | */ | |
314 | if (new) { | |
315 | /* | |
316 | * Change the agi length. | |
317 | */ | |
318 | error = xfs_ialloc_read_agi(mp, tp, agno, &bp); | |
319 | if (error) { | |
320 | goto error0; | |
321 | } | |
322 | ASSERT(bp); | |
323 | agi = XFS_BUF_TO_AGI(bp); | |
324 | INT_MOD(agi->agi_length, ARCH_CONVERT, new); | |
325 | ASSERT(nagcount == oagcount || | |
326 | INT_GET(agi->agi_length, ARCH_CONVERT) == | |
327 | mp->m_sb.sb_agblocks); | |
328 | xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH); | |
329 | /* | |
330 | * Change agf length. | |
331 | */ | |
332 | error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp); | |
333 | if (error) { | |
334 | goto error0; | |
335 | } | |
336 | ASSERT(bp); | |
337 | agf = XFS_BUF_TO_AGF(bp); | |
338 | INT_MOD(agf->agf_length, ARCH_CONVERT, new); | |
339 | ASSERT(INT_GET(agf->agf_length, ARCH_CONVERT) == | |
340 | INT_GET(agi->agi_length, ARCH_CONVERT)); | |
341 | /* | |
342 | * Free the new space. | |
343 | */ | |
344 | error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno, | |
345 | INT_GET(agf->agf_length, ARCH_CONVERT) - new), new); | |
346 | if (error) { | |
347 | goto error0; | |
348 | } | |
349 | } | |
350 | if (nagcount > oagcount) | |
351 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount); | |
352 | if (nb > mp->m_sb.sb_dblocks) | |
353 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, | |
354 | nb - mp->m_sb.sb_dblocks); | |
355 | if (nfree) | |
356 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree); | |
357 | if (dpct) | |
358 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct); | |
359 | error = xfs_trans_commit(tp, 0, NULL); | |
360 | if (error) { | |
361 | return error; | |
362 | } | |
363 | /* New allocation groups fully initialized, so update mount struct */ | |
364 | if (nagimax) | |
365 | mp->m_maxagi = nagimax; | |
366 | if (mp->m_sb.sb_imax_pct) { | |
367 | __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct; | |
368 | do_div(icount, 100); | |
369 | mp->m_maxicount = icount << mp->m_sb.sb_inopblog; | |
370 | } else | |
371 | mp->m_maxicount = 0; | |
372 | for (agno = 1; agno < nagcount; agno++) { | |
373 | error = xfs_read_buf(mp, mp->m_ddev_targp, | |
374 | XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), | |
375 | XFS_FSS_TO_BB(mp, 1), 0, &bp); | |
376 | if (error) { | |
377 | xfs_fs_cmn_err(CE_WARN, mp, | |
378 | "error %d reading secondary superblock for ag %d", | |
379 | error, agno); | |
380 | break; | |
381 | } | |
382 | sbp = XFS_BUF_TO_SBP(bp); | |
383 | xfs_xlatesb(sbp, &mp->m_sb, -1, XFS_SB_ALL_BITS); | |
384 | /* | |
385 | * If we get an error writing out the alternate superblocks, | |
386 | * just issue a warning and continue. The real work is | |
387 | * already done and committed. | |
388 | */ | |
389 | if (!(error = xfs_bwrite(mp, bp))) { | |
390 | continue; | |
391 | } else { | |
392 | xfs_fs_cmn_err(CE_WARN, mp, | |
393 | "write error %d updating secondary superblock for ag %d", | |
394 | error, agno); | |
395 | break; /* no point in continuing */ | |
396 | } | |
397 | } | |
398 | return 0; | |
399 | ||
400 | error0: | |
401 | xfs_trans_cancel(tp, XFS_TRANS_ABORT); | |
402 | return error; | |
403 | } | |
404 | ||
405 | static int | |
406 | xfs_growfs_log_private( | |
407 | xfs_mount_t *mp, /* mount point for filesystem */ | |
408 | xfs_growfs_log_t *in) /* growfs log input struct */ | |
409 | { | |
410 | xfs_extlen_t nb; | |
411 | ||
412 | nb = in->newblocks; | |
413 | if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES)) | |
414 | return XFS_ERROR(EINVAL); | |
415 | if (nb == mp->m_sb.sb_logblocks && | |
416 | in->isint == (mp->m_sb.sb_logstart != 0)) | |
417 | return XFS_ERROR(EINVAL); | |
418 | /* | |
419 | * Moving the log is hard, need new interfaces to sync | |
420 | * the log first, hold off all activity while moving it. | |
421 | * Can have shorter or longer log in the same space, | |
422 | * or transform internal to external log or vice versa. | |
423 | */ | |
424 | return XFS_ERROR(ENOSYS); | |
425 | } | |
426 | ||
427 | /* | |
428 | * protected versions of growfs function acquire and release locks on the mount | |
429 | * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG, | |
430 | * XFS_IOC_FSGROWFSRT | |
431 | */ | |
432 | ||
433 | ||
434 | int | |
435 | xfs_growfs_data( | |
436 | xfs_mount_t *mp, | |
437 | xfs_growfs_data_t *in) | |
438 | { | |
439 | int error; | |
440 | if (!cpsema(&mp->m_growlock)) | |
441 | return XFS_ERROR(EWOULDBLOCK); | |
442 | error = xfs_growfs_data_private(mp, in); | |
443 | vsema(&mp->m_growlock); | |
444 | return error; | |
445 | } | |
446 | ||
447 | int | |
448 | xfs_growfs_log( | |
449 | xfs_mount_t *mp, | |
450 | xfs_growfs_log_t *in) | |
451 | { | |
452 | int error; | |
453 | if (!cpsema(&mp->m_growlock)) | |
454 | return XFS_ERROR(EWOULDBLOCK); | |
455 | error = xfs_growfs_log_private(mp, in); | |
456 | vsema(&mp->m_growlock); | |
457 | return error; | |
458 | } | |
459 | ||
460 | /* | |
461 | * exported through ioctl XFS_IOC_FSCOUNTS | |
462 | */ | |
463 | ||
464 | int | |
465 | xfs_fs_counts( | |
466 | xfs_mount_t *mp, | |
467 | xfs_fsop_counts_t *cnt) | |
468 | { | |
469 | unsigned long s; | |
470 | ||
471 | s = XFS_SB_LOCK(mp); | |
472 | cnt->freedata = mp->m_sb.sb_fdblocks; | |
473 | cnt->freertx = mp->m_sb.sb_frextents; | |
474 | cnt->freeino = mp->m_sb.sb_ifree; | |
475 | cnt->allocino = mp->m_sb.sb_icount; | |
476 | XFS_SB_UNLOCK(mp, s); | |
477 | return 0; | |
478 | } | |
479 | ||
480 | /* | |
481 | * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS | |
482 | * | |
483 | * xfs_reserve_blocks is called to set m_resblks | |
484 | * in the in-core mount table. The number of unused reserved blocks | |
485 | * is kept in m_resbls_avail. | |
486 | * | |
487 | * Reserve the requested number of blocks if available. Otherwise return | |
488 | * as many as possible to satisfy the request. The actual number | |
489 | * reserved are returned in outval | |
490 | * | |
491 | * A null inval pointer indicates that only the current reserved blocks | |
492 | * available should be returned no settings are changed. | |
493 | */ | |
494 | ||
495 | int | |
496 | xfs_reserve_blocks( | |
497 | xfs_mount_t *mp, | |
498 | __uint64_t *inval, | |
499 | xfs_fsop_resblks_t *outval) | |
500 | { | |
501 | __int64_t lcounter, delta; | |
502 | __uint64_t request; | |
503 | unsigned long s; | |
504 | ||
505 | /* If inval is null, report current values and return */ | |
506 | ||
507 | if (inval == (__uint64_t *)NULL) { | |
508 | outval->resblks = mp->m_resblks; | |
509 | outval->resblks_avail = mp->m_resblks_avail; | |
510 | return(0); | |
511 | } | |
512 | ||
513 | request = *inval; | |
514 | s = XFS_SB_LOCK(mp); | |
515 | ||
516 | /* | |
517 | * If our previous reservation was larger than the current value, | |
518 | * then move any unused blocks back to the free pool. | |
519 | */ | |
520 | ||
521 | if (mp->m_resblks > request) { | |
522 | lcounter = mp->m_resblks_avail - request; | |
523 | if (lcounter > 0) { /* release unused blocks */ | |
524 | mp->m_sb.sb_fdblocks += lcounter; | |
525 | mp->m_resblks_avail -= lcounter; | |
526 | } | |
527 | mp->m_resblks = request; | |
528 | } else { | |
529 | delta = request - mp->m_resblks; | |
530 | lcounter = mp->m_sb.sb_fdblocks - delta; | |
531 | if (lcounter < 0) { | |
532 | /* We can't satisfy the request, just get what we can */ | |
533 | mp->m_resblks += mp->m_sb.sb_fdblocks; | |
534 | mp->m_resblks_avail += mp->m_sb.sb_fdblocks; | |
535 | mp->m_sb.sb_fdblocks = 0; | |
536 | } else { | |
537 | mp->m_sb.sb_fdblocks = lcounter; | |
538 | mp->m_resblks = request; | |
539 | mp->m_resblks_avail += delta; | |
540 | } | |
541 | } | |
542 | ||
543 | outval->resblks = mp->m_resblks; | |
544 | outval->resblks_avail = mp->m_resblks_avail; | |
545 | XFS_SB_UNLOCK(mp, s); | |
546 | return(0); | |
547 | } | |
548 | ||
1da177e4 LT |
549 | int |
550 | xfs_fs_goingdown( | |
551 | xfs_mount_t *mp, | |
552 | __uint32_t inflags) | |
553 | { | |
554 | switch (inflags) { | |
555 | case XFS_FSOP_GOING_FLAGS_DEFAULT: { | |
556 | struct vfs *vfsp = XFS_MTOVFS(mp); | |
557 | struct super_block *sb = freeze_bdev(vfsp->vfs_super->s_bdev); | |
558 | ||
559 | if (sb) { | |
560 | xfs_force_shutdown(mp, XFS_FORCE_UMOUNT); | |
561 | thaw_bdev(sb->s_bdev, sb); | |
562 | } | |
563 | ||
564 | break; | |
565 | } | |
566 | case XFS_FSOP_GOING_FLAGS_LOGFLUSH: | |
567 | xfs_force_shutdown(mp, XFS_FORCE_UMOUNT); | |
568 | break; | |
569 | case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH: | |
570 | xfs_force_shutdown(mp, XFS_FORCE_UMOUNT|XFS_LOG_IO_ERROR); | |
571 | break; | |
572 | default: | |
573 | return XFS_ERROR(EINVAL); | |
574 | } | |
575 | ||
576 | return 0; | |
577 | } |