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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "xfs.h"
Nathan Scotta844f452005-11-02 14:38:42 +110019#include "xfs_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include "xfs_types.h"
Nathan Scotta844f452005-11-02 14:38:42 +110021#include "xfs_bit.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include "xfs_inum.h"
23#include "xfs_log.h"
24#include "xfs_trans.h"
25#include "xfs_sb.h"
Nathan Scotta844f452005-11-02 14:38:42 +110026#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "xfs_bmap_btree.h"
Nathan Scotta844f452005-11-02 14:38:42 +110029#include "xfs_alloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include "xfs_ialloc_btree.h"
Nathan Scotta844f452005-11-02 14:38:42 +110031#include "xfs_dinode.h"
32#include "xfs_inode.h"
33#include "xfs_inode_item.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include "xfs_btree.h"
35#include "xfs_error.h"
36#include "xfs_alloc.h"
37#include "xfs_ialloc.h"
38#include "xfs_fsops.h"
39#include "xfs_itable.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include "xfs_trans_space.h"
41#include "xfs_rtalloc.h"
Nathan Scotta844f452005-11-02 14:38:42 +110042#include "xfs_rw.h"
David Chinner2a82b8b2007-07-11 11:09:12 +100043#include "xfs_filestream.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000044#include "xfs_trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46/*
47 * File system operations
48 */
49
50int
51xfs_fs_geometry(
52 xfs_mount_t *mp,
53 xfs_fsop_geom_t *geo,
54 int new_version)
55{
56 geo->blocksize = mp->m_sb.sb_blocksize;
57 geo->rtextsize = mp->m_sb.sb_rextsize;
58 geo->agblocks = mp->m_sb.sb_agblocks;
59 geo->agcount = mp->m_sb.sb_agcount;
60 geo->logblocks = mp->m_sb.sb_logblocks;
61 geo->sectsize = mp->m_sb.sb_sectsize;
62 geo->inodesize = mp->m_sb.sb_inodesize;
63 geo->imaxpct = mp->m_sb.sb_imax_pct;
64 geo->datablocks = mp->m_sb.sb_dblocks;
65 geo->rtblocks = mp->m_sb.sb_rblocks;
66 geo->rtextents = mp->m_sb.sb_rextents;
67 geo->logstart = mp->m_sb.sb_logstart;
68 ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid));
69 memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid));
70 if (new_version >= 2) {
71 geo->sunit = mp->m_sb.sb_unit;
72 geo->swidth = mp->m_sb.sb_width;
73 }
74 if (new_version >= 3) {
75 geo->version = XFS_FSOP_GEOM_VERSION;
76 geo->flags =
Eric Sandeen62118702008-03-06 13:44:28 +110077 (xfs_sb_version_hasattr(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 XFS_FSOP_GEOM_FLAGS_ATTR : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110079 (xfs_sb_version_hasnlink(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 XFS_FSOP_GEOM_FLAGS_NLINK : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110081 (xfs_sb_version_hasquota(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 XFS_FSOP_GEOM_FLAGS_QUOTA : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110083 (xfs_sb_version_hasalign(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 XFS_FSOP_GEOM_FLAGS_IALIGN : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110085 (xfs_sb_version_hasdalign(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 XFS_FSOP_GEOM_FLAGS_DALIGN : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110087 (xfs_sb_version_hasshared(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 XFS_FSOP_GEOM_FLAGS_SHARED : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110089 (xfs_sb_version_hasextflgbit(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110091 (xfs_sb_version_hasdirv2(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110093 (xfs_sb_version_hassector(&mp->m_sb) ?
Nathan Scottd8cc8902005-11-02 10:34:53 +110094 XFS_FSOP_GEOM_FLAGS_SECTOR : 0) |
Barry Naujok189f4bf2008-05-21 16:58:55 +100095 (xfs_sb_version_hasasciici(&mp->m_sb) ?
96 XFS_FSOP_GEOM_FLAGS_DIRV2CI : 0) |
David Chinner92821e22007-05-24 15:26:31 +100097 (xfs_sb_version_haslazysbcount(&mp->m_sb) ?
98 XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110099 (xfs_sb_version_hasattr2(&mp->m_sb) ?
Nathan Scottd8cc8902005-11-02 10:34:53 +1100100 XFS_FSOP_GEOM_FLAGS_ATTR2 : 0);
Eric Sandeen62118702008-03-06 13:44:28 +1100101 geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 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 |=
Eric Sandeen62118702008-03-06 13:44:28 +1100108 (xfs_sb_version_haslogv2(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 XFS_FSOP_GEOM_FLAGS_LOGV2 : 0);
110 geo->logsunit = mp->m_sb.sb_logsunit;
111 }
112 return 0;
113}
114
115static int
116xfs_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;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100126 struct xfs_btree_block *block;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 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);
Nathan Scott4cc929e2007-05-14 18:24:02 +1000144 if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb)))
145 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 dpct = pct - mp->m_sb.sb_imax_pct;
Dave Chinner1922c942010-09-22 10:47:20 +1000147 bp = xfs_buf_read_uncached(mp, mp->m_ddev_targp,
148 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
149 BBTOB(XFS_FSS_TO_BB(mp, 1)), 0);
150 if (!bp)
151 return EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 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--;
Eric Sandeene6da7c92009-05-23 14:30:12 -0500159 nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 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;
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000165
166 /* allocate the new per-ag structures */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 if (nagcount > oagcount) {
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000168 error = xfs_initialize_perag(mp, nagcount, &nagimax);
169 if (error)
170 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 }
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000172
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS);
David Chinner84e1e992007-06-18 16:50:27 +1000174 tp->t_flags |= XFS_TRANS_RESERVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 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
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000181 /*
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 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,
Christoph Hellwig6ad112b2009-11-24 18:02:23 +0000192 XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
193 XFS_FSS_TO_BB(mp, 1), XBF_LOCK | XBF_MAPPED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 agf = XFS_BUF_TO_AGF(bp);
195 memset(agf, 0, mp->m_sb.sb_sectsize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100196 agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
197 agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
198 agf->agf_seqno = cpu_to_be32(agno);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 if (agno == nagcount - 1)
200 agsize =
201 nb -
202 (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks);
203 else
204 agsize = mp->m_sb.sb_agblocks;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100205 agf->agf_length = cpu_to_be32(agsize);
206 agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp));
207 agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp));
208 agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1);
209 agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 agf->agf_flfirst = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100211 agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 agf->agf_flcount = 0;
213 tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100214 agf->agf_freeblks = cpu_to_be32(tmpsize);
215 agf->agf_longest = cpu_to_be32(tmpsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 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,
Christoph Hellwig6ad112b2009-11-24 18:02:23 +0000224 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
225 XFS_FSS_TO_BB(mp, 1), XBF_LOCK | XBF_MAPPED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 agi = XFS_BUF_TO_AGI(bp);
227 memset(agi, 0, mp->m_sb.sb_sectsize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100228 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
229 agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
230 agi->agi_seqno = cpu_to_be32(agno);
231 agi->agi_length = cpu_to_be32(agsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 agi->agi_count = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100233 agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp));
234 agi->agi_level = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 agi->agi_freecount = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100236 agi->agi_newino = cpu_to_be32(NULLAGINO);
237 agi->agi_dirino = cpu_to_be32(NULLAGINO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
Christoph Hellwig16259e72005-11-02 15:11:25 +1100239 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 error = xfs_bwrite(mp, bp);
241 if (error) {
242 goto error0;
243 }
244 /*
245 * BNO btree root block
246 */
247 bp = xfs_buf_get(mp->m_ddev_targp,
Christoph Hellwig6ad112b2009-11-24 18:02:23 +0000248 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
249 BTOBB(mp->m_sb.sb_blocksize),
250 XBF_LOCK | XBF_MAPPED);
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100251 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 memset(block, 0, mp->m_sb.sb_blocksize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100253 block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 block->bb_level = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100255 block->bb_numrecs = cpu_to_be16(1);
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100256 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
257 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
Christoph Hellwig136341b2008-10-30 17:11:40 +1100258 arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100259 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
260 arec->ar_blockcount = cpu_to_be32(
261 agsize - be32_to_cpu(arec->ar_startblock));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 error = xfs_bwrite(mp, bp);
263 if (error) {
264 goto error0;
265 }
266 /*
267 * CNT btree root block
268 */
269 bp = xfs_buf_get(mp->m_ddev_targp,
Christoph Hellwig6ad112b2009-11-24 18:02:23 +0000270 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
271 BTOBB(mp->m_sb.sb_blocksize),
272 XBF_LOCK | XBF_MAPPED);
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100273 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 memset(block, 0, mp->m_sb.sb_blocksize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100275 block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 block->bb_level = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100277 block->bb_numrecs = cpu_to_be16(1);
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100278 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
279 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
Christoph Hellwig136341b2008-10-30 17:11:40 +1100280 arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100281 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
282 arec->ar_blockcount = cpu_to_be32(
283 agsize - be32_to_cpu(arec->ar_startblock));
284 nfree += be32_to_cpu(arec->ar_blockcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 error = xfs_bwrite(mp, bp);
286 if (error) {
287 goto error0;
288 }
289 /*
290 * INO btree root block
291 */
292 bp = xfs_buf_get(mp->m_ddev_targp,
Christoph Hellwig6ad112b2009-11-24 18:02:23 +0000293 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
294 BTOBB(mp->m_sb.sb_blocksize),
295 XBF_LOCK | XBF_MAPPED);
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100296 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 memset(block, 0, mp->m_sb.sb_blocksize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100298 block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 block->bb_level = 0;
300 block->bb_numrecs = 0;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100301 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
302 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 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);
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800322 be32_add_cpu(&agi->agi_length, new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 ASSERT(nagcount == oagcount ||
Christoph Hellwig16259e72005-11-02 15:11:25 +1100324 be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 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);
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800335 be32_add_cpu(&agf->agf_length, new);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100336 ASSERT(be32_to_cpu(agf->agf_length) ==
337 be32_to_cpu(agi->agi_length));
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000338
Tim Shimmin0164af52007-06-18 16:50:08 +1000339 xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 /*
341 * Free the new space.
342 */
343 error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno,
Christoph Hellwig16259e72005-11-02 15:11:25 +1100344 be32_to_cpu(agf->agf_length) - new), new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 if (error) {
346 goto error0;
347 }
348 }
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000349
350 /*
351 * Update changed superblock fields transactionally. These are not
352 * seen by the rest of the world until the transaction commit applies
353 * them atomically to the superblock.
354 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 if (nagcount > oagcount)
356 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount);
357 if (nb > mp->m_sb.sb_dblocks)
358 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS,
359 nb - mp->m_sb.sb_dblocks);
360 if (nfree)
361 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree);
362 if (dpct)
363 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
Eric Sandeen1c72bf92007-05-08 13:48:42 +1000364 error = xfs_trans_commit(tp, 0);
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000365 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 return error;
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000367
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 /* New allocation groups fully initialized, so update mount struct */
369 if (nagimax)
370 mp->m_maxagi = nagimax;
371 if (mp->m_sb.sb_imax_pct) {
372 __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
373 do_div(icount, 100);
374 mp->m_maxicount = icount << mp->m_sb.sb_inopblog;
375 } else
376 mp->m_maxicount = 0;
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000377
378 /* update secondary superblocks. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 for (agno = 1; agno < nagcount; agno++) {
380 error = xfs_read_buf(mp, mp->m_ddev_targp,
381 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
382 XFS_FSS_TO_BB(mp, 1), 0, &bp);
383 if (error) {
384 xfs_fs_cmn_err(CE_WARN, mp,
385 "error %d reading secondary superblock for ag %d",
386 error, agno);
387 break;
388 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000389 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 /*
391 * If we get an error writing out the alternate superblocks,
392 * just issue a warning and continue. The real work is
393 * already done and committed.
394 */
395 if (!(error = xfs_bwrite(mp, bp))) {
396 continue;
397 } else {
398 xfs_fs_cmn_err(CE_WARN, mp,
399 "write error %d updating secondary superblock for ag %d",
400 error, agno);
401 break; /* no point in continuing */
402 }
403 }
404 return 0;
405
406 error0:
407 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
408 return error;
409}
410
411static int
412xfs_growfs_log_private(
413 xfs_mount_t *mp, /* mount point for filesystem */
414 xfs_growfs_log_t *in) /* growfs log input struct */
415{
416 xfs_extlen_t nb;
417
418 nb = in->newblocks;
419 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
420 return XFS_ERROR(EINVAL);
421 if (nb == mp->m_sb.sb_logblocks &&
422 in->isint == (mp->m_sb.sb_logstart != 0))
423 return XFS_ERROR(EINVAL);
424 /*
425 * Moving the log is hard, need new interfaces to sync
426 * the log first, hold off all activity while moving it.
427 * Can have shorter or longer log in the same space,
428 * or transform internal to external log or vice versa.
429 */
430 return XFS_ERROR(ENOSYS);
431}
432
433/*
434 * protected versions of growfs function acquire and release locks on the mount
435 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG,
436 * XFS_IOC_FSGROWFSRT
437 */
438
439
440int
441xfs_growfs_data(
442 xfs_mount_t *mp,
443 xfs_growfs_data_t *in)
444{
445 int error;
sandeen@sandeen.net743bb462008-11-25 21:20:06 -0600446
447 if (!capable(CAP_SYS_ADMIN))
448 return XFS_ERROR(EPERM);
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000449 if (!mutex_trylock(&mp->m_growlock))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 return XFS_ERROR(EWOULDBLOCK);
451 error = xfs_growfs_data_private(mp, in);
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000452 mutex_unlock(&mp->m_growlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 return error;
454}
455
456int
457xfs_growfs_log(
458 xfs_mount_t *mp,
459 xfs_growfs_log_t *in)
460{
461 int error;
sandeen@sandeen.net743bb462008-11-25 21:20:06 -0600462
463 if (!capable(CAP_SYS_ADMIN))
464 return XFS_ERROR(EPERM);
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000465 if (!mutex_trylock(&mp->m_growlock))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 return XFS_ERROR(EWOULDBLOCK);
467 error = xfs_growfs_log_private(mp, in);
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000468 mutex_unlock(&mp->m_growlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 return error;
470}
471
472/*
473 * exported through ioctl XFS_IOC_FSCOUNTS
474 */
475
476int
477xfs_fs_counts(
478 xfs_mount_t *mp,
479 xfs_fsop_counts_t *cnt)
480{
Christoph Hellwigd4d90b52008-04-22 17:34:37 +1000481 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000482 spin_lock(&mp->m_sb_lock);
David Chinner4be536d2006-09-07 14:26:50 +1000483 cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 cnt->freertx = mp->m_sb.sb_frextents;
485 cnt->freeino = mp->m_sb.sb_ifree;
486 cnt->allocino = mp->m_sb.sb_icount;
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000487 spin_unlock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 return 0;
489}
490
491/*
492 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS
493 *
494 * xfs_reserve_blocks is called to set m_resblks
495 * in the in-core mount table. The number of unused reserved blocks
Nathan Scottc41564b2006-03-29 08:55:14 +1000496 * is kept in m_resblks_avail.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 *
498 * Reserve the requested number of blocks if available. Otherwise return
499 * as many as possible to satisfy the request. The actual number
500 * reserved are returned in outval
501 *
502 * A null inval pointer indicates that only the current reserved blocks
503 * available should be returned no settings are changed.
504 */
505
506int
507xfs_reserve_blocks(
508 xfs_mount_t *mp,
509 __uint64_t *inval,
510 xfs_fsop_resblks_t *outval)
511{
David Chinnerdbcabad2007-02-10 18:36:17 +1100512 __int64_t lcounter, delta, fdblks_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 __uint64_t request;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514
515 /* If inval is null, report current values and return */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 if (inval == (__uint64_t *)NULL) {
David Chinner84e1e992007-06-18 16:50:27 +1000517 if (!outval)
518 return EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 outval->resblks = mp->m_resblks;
520 outval->resblks_avail = mp->m_resblks_avail;
Jesper Juhl014c2542006-01-15 02:37:08 +0100521 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 }
523
524 request = *inval;
David Chinnerdbcabad2007-02-10 18:36:17 +1100525
526 /*
527 * With per-cpu counters, this becomes an interesting
528 * problem. we needto work out if we are freeing or allocation
529 * blocks first, then we can do the modification as necessary.
530 *
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000531 * We do this under the m_sb_lock so that if we are near
David Chinnerdbcabad2007-02-10 18:36:17 +1100532 * ENOSPC, we will hold out any changes while we work out
533 * what to do. This means that the amount of free space can
534 * change while we do this, so we need to retry if we end up
535 * trying to reserve more space than is available.
536 *
537 * We also use the xfs_mod_incore_sb() interface so that we
538 * don't have to care about whether per cpu counter are
539 * enabled, disabled or even compiled in....
540 */
541retry:
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000542 spin_lock(&mp->m_sb_lock);
Christoph Hellwigd4d90b52008-04-22 17:34:37 +1000543 xfs_icsb_sync_counters_locked(mp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544
545 /*
546 * If our previous reservation was larger than the current value,
547 * then move any unused blocks back to the free pool.
548 */
David Chinnerdbcabad2007-02-10 18:36:17 +1100549 fdblks_delta = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 if (mp->m_resblks > request) {
551 lcounter = mp->m_resblks_avail - request;
552 if (lcounter > 0) { /* release unused blocks */
David Chinnerdbcabad2007-02-10 18:36:17 +1100553 fdblks_delta = lcounter;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 mp->m_resblks_avail -= lcounter;
555 }
556 mp->m_resblks = request;
557 } else {
David Chinner4be536d2006-09-07 14:26:50 +1000558 __int64_t free;
559
560 free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
David Chinnerdbcabad2007-02-10 18:36:17 +1100561 if (!free)
562 goto out; /* ENOSPC and fdblks_delta = 0 */
563
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 delta = request - mp->m_resblks;
David Chinner4be536d2006-09-07 14:26:50 +1000565 lcounter = free - delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 if (lcounter < 0) {
567 /* We can't satisfy the request, just get what we can */
David Chinner4be536d2006-09-07 14:26:50 +1000568 mp->m_resblks += free;
569 mp->m_resblks_avail += free;
David Chinnerdbcabad2007-02-10 18:36:17 +1100570 fdblks_delta = -free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 } else {
David Chinnerdbcabad2007-02-10 18:36:17 +1100572 fdblks_delta = -delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 mp->m_resblks = request;
574 mp->m_resblks_avail += delta;
575 }
576 }
David Chinnerdbcabad2007-02-10 18:36:17 +1100577out:
David Chinner84e1e992007-06-18 16:50:27 +1000578 if (outval) {
579 outval->resblks = mp->m_resblks;
580 outval->resblks_avail = mp->m_resblks_avail;
581 }
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000582 spin_unlock(&mp->m_sb_lock);
David Chinnerdbcabad2007-02-10 18:36:17 +1100583
584 if (fdblks_delta) {
585 /*
586 * If we are putting blocks back here, m_resblks_avail is
Malcolm Parsons9da096f2009-03-29 09:55:42 +0200587 * already at its max so this will put it in the free pool.
David Chinnerdbcabad2007-02-10 18:36:17 +1100588 *
589 * If we need space, we'll either succeed in getting it
590 * from the free block count or we'll get an enospc. If
591 * we get a ENOSPC, it means things changed while we were
592 * calculating fdblks_delta and so we should try again to
593 * see if there is anything left to reserve.
594 *
595 * Don't set the reserved flag here - we don't want to reserve
596 * the extra reserve blocks from the reserve.....
597 */
598 int error;
Christoph Hellwig96540c72010-09-30 02:25:55 +0000599 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
600 fdblks_delta, 0);
David Chinnerdbcabad2007-02-10 18:36:17 +1100601 if (error == ENOSPC)
602 goto retry;
603 }
Jesper Juhl014c2542006-01-15 02:37:08 +0100604 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605}
606
Dave Chinner1a387d32010-08-24 11:46:31 +1000607/*
608 * Dump a transaction into the log that contains no real change. This is needed
609 * to be able to make the log dirty or stamp the current tail LSN into the log
610 * during the covering operation.
611 *
612 * We cannot use an inode here for this - that will push dirty state back up
613 * into the VFS and then periodic inode flushing will prevent log covering from
614 * making progress. Hence we log a field in the superblock instead.
615 */
Takashi Satoc4be0c12009-01-09 16:40:58 -0800616int
Nathan Scott421ad132006-06-09 17:12:46 +1000617xfs_fs_log_dummy(
Dave Chinner1a387d32010-08-24 11:46:31 +1000618 xfs_mount_t *mp,
619 int flags)
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100620{
Nathan Scott421ad132006-06-09 17:12:46 +1000621 xfs_trans_t *tp;
Takashi Satoc4be0c12009-01-09 16:40:58 -0800622 int error;
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100623
Christoph Hellwig80641dc2009-10-19 04:00:03 +0000624 tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1, KM_SLEEP);
Dave Chinner1a387d32010-08-24 11:46:31 +1000625 error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
626 XFS_DEFAULT_LOG_COUNT);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800627 if (error) {
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100628 xfs_trans_cancel(tp, 0);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800629 return error;
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100630 }
631
Dave Chinner1a387d32010-08-24 11:46:31 +1000632 /* log the UUID because it is an unchanging field */
633 xfs_mod_sb(tp, XFS_SB_UUID);
634 if (flags & SYNC_WAIT)
635 xfs_trans_set_sync(tp);
636 return xfs_trans_commit(tp, 0);
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100637}
638
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639int
640xfs_fs_goingdown(
641 xfs_mount_t *mp,
642 __uint32_t inflags)
643{
644 switch (inflags) {
645 case XFS_FSOP_GOING_FLAGS_DEFAULT: {
Christoph Hellwigb267ce92007-08-30 17:21:30 +1000646 struct super_block *sb = freeze_bdev(mp->m_super->s_bdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647
Christoph Hellwigf33c6792005-11-25 16:41:47 +1100648 if (sb && !IS_ERR(sb)) {
Nathan Scott7d04a332006-06-09 14:58:38 +1000649 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 thaw_bdev(sb->s_bdev, sb);
651 }
Barry Naujok189f4bf2008-05-21 16:58:55 +1000652
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 break;
654 }
655 case XFS_FSOP_GOING_FLAGS_LOGFLUSH:
Nathan Scott7d04a332006-06-09 14:58:38 +1000656 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 break;
658 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH:
Nathan Scott7d04a332006-06-09 14:58:38 +1000659 xfs_force_shutdown(mp,
660 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 break;
662 default:
663 return XFS_ERROR(EINVAL);
664 }
665
666 return 0;
667}