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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{
Dan Rosenbergc4d0c3b2011-02-14 13:45:28 +000056
57 memset(geo, 0, sizeof(*geo));
58
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 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 =
Eric Sandeen62118702008-03-06 13:44:28 +110080 (xfs_sb_version_hasattr(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 XFS_FSOP_GEOM_FLAGS_ATTR : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110082 (xfs_sb_version_hasnlink(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 XFS_FSOP_GEOM_FLAGS_NLINK : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110084 (xfs_sb_version_hasquota(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 XFS_FSOP_GEOM_FLAGS_QUOTA : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110086 (xfs_sb_version_hasalign(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 XFS_FSOP_GEOM_FLAGS_IALIGN : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110088 (xfs_sb_version_hasdalign(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 XFS_FSOP_GEOM_FLAGS_DALIGN : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110090 (xfs_sb_version_hasshared(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 XFS_FSOP_GEOM_FLAGS_SHARED : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110092 (xfs_sb_version_hasextflgbit(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110094 (xfs_sb_version_hasdirv2(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110096 (xfs_sb_version_hassector(&mp->m_sb) ?
Nathan Scottd8cc8902005-11-02 10:34:53 +110097 XFS_FSOP_GEOM_FLAGS_SECTOR : 0) |
Barry Naujok189f4bf2008-05-21 16:58:55 +100098 (xfs_sb_version_hasasciici(&mp->m_sb) ?
99 XFS_FSOP_GEOM_FLAGS_DIRV2CI : 0) |
David Chinner92821e22007-05-24 15:26:31 +1000100 (xfs_sb_version_haslazysbcount(&mp->m_sb) ?
101 XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +1100102 (xfs_sb_version_hasattr2(&mp->m_sb) ?
Nathan Scottd8cc8902005-11-02 10:34:53 +1100103 XFS_FSOP_GEOM_FLAGS_ATTR2 : 0);
Eric Sandeen62118702008-03-06 13:44:28 +1100104 geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 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 |=
Eric Sandeen62118702008-03-06 13:44:28 +1100111 (xfs_sb_version_haslogv2(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 XFS_FSOP_GEOM_FLAGS_LOGV2 : 0);
113 geo->logsunit = mp->m_sb.sb_logsunit;
114 }
115 return 0;
116}
117
118static int
119xfs_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;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100129 struct xfs_btree_block *block;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 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);
Nathan Scott4cc929e2007-05-14 18:24:02 +1000147 if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb)))
148 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 dpct = pct - mp->m_sb.sb_imax_pct;
Dave Chinner1922c942010-09-22 10:47:20 +1000150 bp = xfs_buf_read_uncached(mp, mp->m_ddev_targp,
151 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
152 BBTOB(XFS_FSS_TO_BB(mp, 1)), 0);
153 if (!bp)
154 return EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 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--;
Eric Sandeene6da7c92009-05-23 14:30:12 -0500162 nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 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;
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000168
169 /* allocate the new per-ag structures */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 if (nagcount > oagcount) {
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000171 error = xfs_initialize_perag(mp, nagcount, &nagimax);
172 if (error)
173 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 }
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000175
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS);
David Chinner84e1e992007-06-18 16:50:27 +1000177 tp->t_flags |= XFS_TRANS_RESERVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 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
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000184 /*
185 * Write new AG headers to disk. Non-transactional, but written
186 * synchronously so they are completed prior to the growfs transaction
187 * being logged.
188 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 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,
Christoph Hellwig6ad112b2009-11-24 18:02:23 +0000195 XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
196 XFS_FSS_TO_BB(mp, 1), XBF_LOCK | XBF_MAPPED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 agf = XFS_BUF_TO_AGF(bp);
198 memset(agf, 0, mp->m_sb.sb_sectsize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100199 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 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;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100208 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 agf->agf_flfirst = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100214 agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 agf->agf_flcount = 0;
216 tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100217 agf->agf_freeblks = cpu_to_be32(tmpsize);
218 agf->agf_longest = cpu_to_be32(tmpsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 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,
Christoph Hellwig6ad112b2009-11-24 18:02:23 +0000227 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
228 XFS_FSS_TO_BB(mp, 1), XBF_LOCK | XBF_MAPPED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 agi = XFS_BUF_TO_AGI(bp);
230 memset(agi, 0, mp->m_sb.sb_sectsize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100231 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 agi->agi_count = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100236 agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp));
237 agi->agi_level = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 agi->agi_freecount = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100239 agi->agi_newino = cpu_to_be32(NULLAGINO);
240 agi->agi_dirino = cpu_to_be32(NULLAGINO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
Christoph Hellwig16259e72005-11-02 15:11:25 +1100242 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 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,
Christoph Hellwig6ad112b2009-11-24 18:02:23 +0000251 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
252 BTOBB(mp->m_sb.sb_blocksize),
253 XBF_LOCK | XBF_MAPPED);
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100254 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 memset(block, 0, mp->m_sb.sb_blocksize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100256 block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 block->bb_level = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100258 block->bb_numrecs = cpu_to_be16(1);
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100259 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
260 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
Christoph Hellwig136341b2008-10-30 17:11:40 +1100261 arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100262 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));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 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,
Christoph Hellwig6ad112b2009-11-24 18:02:23 +0000273 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
274 BTOBB(mp->m_sb.sb_blocksize),
275 XBF_LOCK | XBF_MAPPED);
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100276 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 memset(block, 0, mp->m_sb.sb_blocksize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100278 block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 block->bb_level = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100280 block->bb_numrecs = cpu_to_be16(1);
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100281 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
282 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
Christoph Hellwig136341b2008-10-30 17:11:40 +1100283 arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100284 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
285 arec->ar_blockcount = cpu_to_be32(
286 agsize - be32_to_cpu(arec->ar_startblock));
287 nfree += be32_to_cpu(arec->ar_blockcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 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,
Christoph Hellwig6ad112b2009-11-24 18:02:23 +0000296 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
297 BTOBB(mp->m_sb.sb_blocksize),
298 XBF_LOCK | XBF_MAPPED);
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100299 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 memset(block, 0, mp->m_sb.sb_blocksize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100301 block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 block->bb_level = 0;
303 block->bb_numrecs = 0;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100304 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
305 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 error = xfs_bwrite(mp, bp);
307 if (error) {
308 goto error0;
309 }
310 }
311 xfs_trans_agblocks_delta(tp, nfree);
312 /*
313 * There are new blocks in the old last a.g.
314 */
315 if (new) {
316 /*
317 * Change the agi length.
318 */
319 error = xfs_ialloc_read_agi(mp, tp, agno, &bp);
320 if (error) {
321 goto error0;
322 }
323 ASSERT(bp);
324 agi = XFS_BUF_TO_AGI(bp);
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800325 be32_add_cpu(&agi->agi_length, new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 ASSERT(nagcount == oagcount ||
Christoph Hellwig16259e72005-11-02 15:11:25 +1100327 be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 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);
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800338 be32_add_cpu(&agf->agf_length, new);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100339 ASSERT(be32_to_cpu(agf->agf_length) ==
340 be32_to_cpu(agi->agi_length));
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000341
Tim Shimmin0164af52007-06-18 16:50:08 +1000342 xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 /*
344 * Free the new space.
345 */
346 error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno,
Christoph Hellwig16259e72005-11-02 15:11:25 +1100347 be32_to_cpu(agf->agf_length) - new), new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 if (error) {
349 goto error0;
350 }
351 }
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000352
353 /*
354 * Update changed superblock fields transactionally. These are not
355 * seen by the rest of the world until the transaction commit applies
356 * them atomically to the superblock.
357 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 if (nagcount > oagcount)
359 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount);
360 if (nb > mp->m_sb.sb_dblocks)
361 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS,
362 nb - mp->m_sb.sb_dblocks);
363 if (nfree)
364 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree);
365 if (dpct)
366 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
Eric Sandeen1c72bf92007-05-08 13:48:42 +1000367 error = xfs_trans_commit(tp, 0);
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000368 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 return error;
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000370
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 /* New allocation groups fully initialized, so update mount struct */
372 if (nagimax)
373 mp->m_maxagi = nagimax;
374 if (mp->m_sb.sb_imax_pct) {
375 __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
376 do_div(icount, 100);
377 mp->m_maxicount = icount << mp->m_sb.sb_inopblog;
378 } else
379 mp->m_maxicount = 0;
Dave Chinner055388a2011-01-04 11:35:03 +1100380 xfs_set_low_space_thresholds(mp);
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000381
382 /* update secondary superblocks. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 for (agno = 1; agno < nagcount; agno++) {
384 error = xfs_read_buf(mp, mp->m_ddev_targp,
385 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
386 XFS_FSS_TO_BB(mp, 1), 0, &bp);
387 if (error) {
Dave Chinner53487782011-03-07 10:05:35 +1100388 xfs_warn(mp,
389 "error %d reading secondary superblock for ag %d",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 error, agno);
391 break;
392 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000393 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 /*
395 * If we get an error writing out the alternate superblocks,
396 * just issue a warning and continue. The real work is
397 * already done and committed.
398 */
399 if (!(error = xfs_bwrite(mp, bp))) {
400 continue;
401 } else {
Dave Chinner53487782011-03-07 10:05:35 +1100402 xfs_warn(mp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 "write error %d updating secondary superblock for ag %d",
404 error, agno);
405 break; /* no point in continuing */
406 }
407 }
408 return 0;
409
410 error0:
411 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
412 return error;
413}
414
415static int
416xfs_growfs_log_private(
417 xfs_mount_t *mp, /* mount point for filesystem */
418 xfs_growfs_log_t *in) /* growfs log input struct */
419{
420 xfs_extlen_t nb;
421
422 nb = in->newblocks;
423 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
424 return XFS_ERROR(EINVAL);
425 if (nb == mp->m_sb.sb_logblocks &&
426 in->isint == (mp->m_sb.sb_logstart != 0))
427 return XFS_ERROR(EINVAL);
428 /*
429 * Moving the log is hard, need new interfaces to sync
430 * the log first, hold off all activity while moving it.
431 * Can have shorter or longer log in the same space,
432 * or transform internal to external log or vice versa.
433 */
434 return XFS_ERROR(ENOSYS);
435}
436
437/*
438 * protected versions of growfs function acquire and release locks on the mount
439 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG,
440 * XFS_IOC_FSGROWFSRT
441 */
442
443
444int
445xfs_growfs_data(
446 xfs_mount_t *mp,
447 xfs_growfs_data_t *in)
448{
449 int error;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600450
451 if (!capable(CAP_SYS_ADMIN))
452 return XFS_ERROR(EPERM);
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000453 if (!mutex_trylock(&mp->m_growlock))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 return XFS_ERROR(EWOULDBLOCK);
455 error = xfs_growfs_data_private(mp, in);
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000456 mutex_unlock(&mp->m_growlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 return error;
458}
459
460int
461xfs_growfs_log(
462 xfs_mount_t *mp,
463 xfs_growfs_log_t *in)
464{
465 int error;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600466
467 if (!capable(CAP_SYS_ADMIN))
468 return XFS_ERROR(EPERM);
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000469 if (!mutex_trylock(&mp->m_growlock))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 return XFS_ERROR(EWOULDBLOCK);
471 error = xfs_growfs_log_private(mp, in);
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000472 mutex_unlock(&mp->m_growlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 return error;
474}
475
476/*
477 * exported through ioctl XFS_IOC_FSCOUNTS
478 */
479
480int
481xfs_fs_counts(
482 xfs_mount_t *mp,
483 xfs_fsop_counts_t *cnt)
484{
Christoph Hellwigd4d90b52008-04-22 17:34:37 +1000485 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000486 spin_lock(&mp->m_sb_lock);
David Chinner4be536d2006-09-07 14:26:50 +1000487 cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 cnt->freertx = mp->m_sb.sb_frextents;
489 cnt->freeino = mp->m_sb.sb_ifree;
490 cnt->allocino = mp->m_sb.sb_icount;
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000491 spin_unlock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 return 0;
493}
494
495/*
496 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS
497 *
498 * xfs_reserve_blocks is called to set m_resblks
499 * in the in-core mount table. The number of unused reserved blocks
Nathan Scottc41564b2006-03-29 08:55:14 +1000500 * is kept in m_resblks_avail.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 *
502 * Reserve the requested number of blocks if available. Otherwise return
503 * as many as possible to satisfy the request. The actual number
504 * reserved are returned in outval
505 *
506 * A null inval pointer indicates that only the current reserved blocks
507 * available should be returned no settings are changed.
508 */
509
510int
511xfs_reserve_blocks(
512 xfs_mount_t *mp,
513 __uint64_t *inval,
514 xfs_fsop_resblks_t *outval)
515{
David Chinnerdbcabad2007-02-10 18:36:17 +1100516 __int64_t lcounter, delta, fdblks_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 __uint64_t request;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518
519 /* If inval is null, report current values and return */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 if (inval == (__uint64_t *)NULL) {
David Chinner84e1e992007-06-18 16:50:27 +1000521 if (!outval)
522 return EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 outval->resblks = mp->m_resblks;
524 outval->resblks_avail = mp->m_resblks_avail;
Jesper Juhl014c2542006-01-15 02:37:08 +0100525 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 }
527
528 request = *inval;
David Chinnerdbcabad2007-02-10 18:36:17 +1100529
530 /*
531 * With per-cpu counters, this becomes an interesting
532 * problem. we needto work out if we are freeing or allocation
533 * blocks first, then we can do the modification as necessary.
534 *
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000535 * We do this under the m_sb_lock so that if we are near
David Chinnerdbcabad2007-02-10 18:36:17 +1100536 * ENOSPC, we will hold out any changes while we work out
537 * what to do. This means that the amount of free space can
538 * change while we do this, so we need to retry if we end up
539 * trying to reserve more space than is available.
540 *
541 * We also use the xfs_mod_incore_sb() interface so that we
542 * don't have to care about whether per cpu counter are
543 * enabled, disabled or even compiled in....
544 */
545retry:
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000546 spin_lock(&mp->m_sb_lock);
Christoph Hellwigd4d90b52008-04-22 17:34:37 +1000547 xfs_icsb_sync_counters_locked(mp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548
549 /*
550 * If our previous reservation was larger than the current value,
551 * then move any unused blocks back to the free pool.
552 */
David Chinnerdbcabad2007-02-10 18:36:17 +1100553 fdblks_delta = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 if (mp->m_resblks > request) {
555 lcounter = mp->m_resblks_avail - request;
556 if (lcounter > 0) { /* release unused blocks */
David Chinnerdbcabad2007-02-10 18:36:17 +1100557 fdblks_delta = lcounter;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 mp->m_resblks_avail -= lcounter;
559 }
560 mp->m_resblks = request;
561 } else {
David Chinner4be536d2006-09-07 14:26:50 +1000562 __int64_t free;
563
564 free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
David Chinnerdbcabad2007-02-10 18:36:17 +1100565 if (!free)
566 goto out; /* ENOSPC and fdblks_delta = 0 */
567
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 delta = request - mp->m_resblks;
David Chinner4be536d2006-09-07 14:26:50 +1000569 lcounter = free - delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 if (lcounter < 0) {
571 /* We can't satisfy the request, just get what we can */
David Chinner4be536d2006-09-07 14:26:50 +1000572 mp->m_resblks += free;
573 mp->m_resblks_avail += free;
David Chinnerdbcabad2007-02-10 18:36:17 +1100574 fdblks_delta = -free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 } else {
David Chinnerdbcabad2007-02-10 18:36:17 +1100576 fdblks_delta = -delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 mp->m_resblks = request;
578 mp->m_resblks_avail += delta;
579 }
580 }
David Chinnerdbcabad2007-02-10 18:36:17 +1100581out:
David Chinner84e1e992007-06-18 16:50:27 +1000582 if (outval) {
583 outval->resblks = mp->m_resblks;
584 outval->resblks_avail = mp->m_resblks_avail;
585 }
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000586 spin_unlock(&mp->m_sb_lock);
David Chinnerdbcabad2007-02-10 18:36:17 +1100587
588 if (fdblks_delta) {
589 /*
590 * If we are putting blocks back here, m_resblks_avail is
Malcolm Parsons9da096f2009-03-29 09:55:42 +0200591 * already at its max so this will put it in the free pool.
David Chinnerdbcabad2007-02-10 18:36:17 +1100592 *
593 * If we need space, we'll either succeed in getting it
594 * from the free block count or we'll get an enospc. If
595 * we get a ENOSPC, it means things changed while we were
596 * calculating fdblks_delta and so we should try again to
597 * see if there is anything left to reserve.
598 *
599 * Don't set the reserved flag here - we don't want to reserve
600 * the extra reserve blocks from the reserve.....
601 */
602 int error;
Christoph Hellwig96540c72010-09-30 02:25:55 +0000603 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
604 fdblks_delta, 0);
David Chinnerdbcabad2007-02-10 18:36:17 +1100605 if (error == ENOSPC)
606 goto retry;
607 }
Jesper Juhl014c2542006-01-15 02:37:08 +0100608 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609}
610
Dave Chinner1a387d32010-08-24 11:46:31 +1000611/*
612 * Dump a transaction into the log that contains no real change. This is needed
613 * to be able to make the log dirty or stamp the current tail LSN into the log
614 * during the covering operation.
615 *
616 * We cannot use an inode here for this - that will push dirty state back up
617 * into the VFS and then periodic inode flushing will prevent log covering from
Dave Chinnerc58efdb2011-01-04 04:49:29 +0000618 * making progress. Hence we log a field in the superblock instead and use a
619 * synchronous transaction to ensure the superblock is immediately unpinned
620 * and can be written back.
Dave Chinner1a387d32010-08-24 11:46:31 +1000621 */
Takashi Satoc4be0c12009-01-09 16:40:58 -0800622int
Nathan Scott421ad132006-06-09 17:12:46 +1000623xfs_fs_log_dummy(
Dave Chinnerc58efdb2011-01-04 04:49:29 +0000624 xfs_mount_t *mp)
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100625{
Nathan Scott421ad132006-06-09 17:12:46 +1000626 xfs_trans_t *tp;
Takashi Satoc4be0c12009-01-09 16:40:58 -0800627 int error;
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100628
Christoph Hellwig80641dc2009-10-19 04:00:03 +0000629 tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1, KM_SLEEP);
Dave Chinner1a387d32010-08-24 11:46:31 +1000630 error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
631 XFS_DEFAULT_LOG_COUNT);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800632 if (error) {
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100633 xfs_trans_cancel(tp, 0);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800634 return error;
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100635 }
636
Dave Chinner1a387d32010-08-24 11:46:31 +1000637 /* log the UUID because it is an unchanging field */
638 xfs_mod_sb(tp, XFS_SB_UUID);
Dave Chinnerc58efdb2011-01-04 04:49:29 +0000639 xfs_trans_set_sync(tp);
Dave Chinner1a387d32010-08-24 11:46:31 +1000640 return xfs_trans_commit(tp, 0);
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100641}
642
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643int
644xfs_fs_goingdown(
645 xfs_mount_t *mp,
646 __uint32_t inflags)
647{
648 switch (inflags) {
649 case XFS_FSOP_GOING_FLAGS_DEFAULT: {
Christoph Hellwigb267ce92007-08-30 17:21:30 +1000650 struct super_block *sb = freeze_bdev(mp->m_super->s_bdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651
Christoph Hellwigf33c6792005-11-25 16:41:47 +1100652 if (sb && !IS_ERR(sb)) {
Nathan Scott7d04a332006-06-09 14:58:38 +1000653 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 thaw_bdev(sb->s_bdev, sb);
655 }
Barry Naujok189f4bf2008-05-21 16:58:55 +1000656
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 break;
658 }
659 case XFS_FSOP_GOING_FLAGS_LOGFLUSH:
Nathan Scott7d04a332006-06-09 14:58:38 +1000660 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 break;
662 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH:
Nathan Scott7d04a332006-06-09 14:58:38 +1000663 xfs_force_shutdown(mp,
664 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 break;
666 default:
667 return XFS_ERROR(EINVAL);
668 }
669
670 return 0;
671}