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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"
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include "xfs_log.h"
22#include "xfs_trans.h"
23#include "xfs_sb.h"
Nathan Scotta844f452005-11-02 14:38:42 +110024#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "xfs_bmap_btree.h"
Nathan Scotta844f452005-11-02 14:38:42 +110027#include "xfs_alloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "xfs_ialloc_btree.h"
Nathan Scotta844f452005-11-02 14:38:42 +110029#include "xfs_dinode.h"
30#include "xfs_inode.h"
31#include "xfs_inode_item.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include "xfs_btree.h"
33#include "xfs_error.h"
34#include "xfs_alloc.h"
35#include "xfs_ialloc.h"
36#include "xfs_fsops.h"
37#include "xfs_itable.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include "xfs_trans_space.h"
39#include "xfs_rtalloc.h"
David Chinner2a82b8b2007-07-11 11:09:12 +100040#include "xfs_filestream.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000041#include "xfs_trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
43/*
44 * File system operations
45 */
46
47int
48xfs_fs_geometry(
49 xfs_mount_t *mp,
50 xfs_fsop_geom_t *geo,
51 int new_version)
52{
Dan Rosenbergc4d0c3b2011-02-14 13:45:28 +000053
54 memset(geo, 0, sizeof(*geo));
55
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 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 Chinnere70b73f2012-04-23 15:58:49 +1000147 bp = xfs_buf_read_uncached(mp->m_ddev_targp,
Dave Chinner1922c942010-09-22 10:47:20 +1000148 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
Dave Chinnere70b73f2012-04-23 15:58:49 +1000149 XFS_FSS_TO_BB(mp, 1), 0);
Dave Chinner1922c942010-09-22 10:47:20 +1000150 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)),
Dave Chinner611c9942012-04-23 15:59:07 +1000193 XFS_FSS_TO_BB(mp, 1), 0);
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000194 if (!bp) {
195 error = ENOMEM;
196 goto error0;
197 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 agf = XFS_BUF_TO_AGF(bp);
199 memset(agf, 0, mp->m_sb.sb_sectsize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100200 agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
201 agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
202 agf->agf_seqno = cpu_to_be32(agno);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 if (agno == nagcount - 1)
204 agsize =
205 nb -
206 (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks);
207 else
208 agsize = mp->m_sb.sb_agblocks;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100209 agf->agf_length = cpu_to_be32(agsize);
210 agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp));
211 agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp));
212 agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1);
213 agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 agf->agf_flfirst = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100215 agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 agf->agf_flcount = 0;
217 tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100218 agf->agf_freeblks = cpu_to_be32(tmpsize);
219 agf->agf_longest = cpu_to_be32(tmpsize);
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000220 error = xfs_bwrite(bp);
221 xfs_buf_relse(bp);
222 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 goto error0;
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000224
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 /*
226 * AG inode header block
227 */
228 bp = xfs_buf_get(mp->m_ddev_targp,
Christoph Hellwig6ad112b2009-11-24 18:02:23 +0000229 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
Dave Chinner611c9942012-04-23 15:59:07 +1000230 XFS_FSS_TO_BB(mp, 1), 0);
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000231 if (!bp) {
232 error = ENOMEM;
233 goto error0;
234 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 agi = XFS_BUF_TO_AGI(bp);
236 memset(agi, 0, mp->m_sb.sb_sectsize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100237 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
238 agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
239 agi->agi_seqno = cpu_to_be32(agno);
240 agi->agi_length = cpu_to_be32(agsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 agi->agi_count = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100242 agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp));
243 agi->agi_level = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 agi->agi_freecount = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100245 agi->agi_newino = cpu_to_be32(NULLAGINO);
246 agi->agi_dirino = cpu_to_be32(NULLAGINO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
Christoph Hellwig16259e72005-11-02 15:11:25 +1100248 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000249 error = xfs_bwrite(bp);
250 xfs_buf_relse(bp);
251 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 goto error0;
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000253
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 /*
255 * BNO btree root block
256 */
257 bp = xfs_buf_get(mp->m_ddev_targp,
Christoph Hellwig6ad112b2009-11-24 18:02:23 +0000258 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
Dave Chinner611c9942012-04-23 15:59:07 +1000259 BTOBB(mp->m_sb.sb_blocksize), 0);
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000260 if (!bp) {
261 error = ENOMEM;
262 goto error0;
263 }
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100264 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 memset(block, 0, mp->m_sb.sb_blocksize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100266 block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 block->bb_level = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100268 block->bb_numrecs = cpu_to_be16(1);
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100269 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
270 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
Christoph Hellwig136341b2008-10-30 17:11:40 +1100271 arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100272 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
273 arec->ar_blockcount = cpu_to_be32(
274 agsize - be32_to_cpu(arec->ar_startblock));
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000275 error = xfs_bwrite(bp);
276 xfs_buf_relse(bp);
277 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 goto error0;
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000279
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 /*
281 * CNT btree root block
282 */
283 bp = xfs_buf_get(mp->m_ddev_targp,
Christoph Hellwig6ad112b2009-11-24 18:02:23 +0000284 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
Dave Chinner611c9942012-04-23 15:59:07 +1000285 BTOBB(mp->m_sb.sb_blocksize), 0);
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000286 if (!bp) {
287 error = ENOMEM;
288 goto error0;
289 }
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100290 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 memset(block, 0, mp->m_sb.sb_blocksize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100292 block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 block->bb_level = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100294 block->bb_numrecs = cpu_to_be16(1);
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100295 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
296 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
Christoph Hellwig136341b2008-10-30 17:11:40 +1100297 arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100298 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
299 arec->ar_blockcount = cpu_to_be32(
300 agsize - be32_to_cpu(arec->ar_startblock));
301 nfree += be32_to_cpu(arec->ar_blockcount);
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000302 error = xfs_bwrite(bp);
303 xfs_buf_relse(bp);
304 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 goto error0;
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 /*
308 * INO btree root block
309 */
310 bp = xfs_buf_get(mp->m_ddev_targp,
Christoph Hellwig6ad112b2009-11-24 18:02:23 +0000311 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
Dave Chinner611c9942012-04-23 15:59:07 +1000312 BTOBB(mp->m_sb.sb_blocksize), 0);
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000313 if (!bp) {
314 error = ENOMEM;
315 goto error0;
316 }
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100317 block = XFS_BUF_TO_BLOCK(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 memset(block, 0, mp->m_sb.sb_blocksize);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100319 block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 block->bb_level = 0;
321 block->bb_numrecs = 0;
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100322 block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
323 block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000324 error = xfs_bwrite(bp);
325 xfs_buf_relse(bp);
326 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 goto error0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 }
329 xfs_trans_agblocks_delta(tp, nfree);
330 /*
331 * There are new blocks in the old last a.g.
332 */
333 if (new) {
334 /*
335 * Change the agi length.
336 */
337 error = xfs_ialloc_read_agi(mp, tp, agno, &bp);
338 if (error) {
339 goto error0;
340 }
341 ASSERT(bp);
342 agi = XFS_BUF_TO_AGI(bp);
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800343 be32_add_cpu(&agi->agi_length, new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 ASSERT(nagcount == oagcount ||
Christoph Hellwig16259e72005-11-02 15:11:25 +1100345 be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH);
347 /*
348 * Change agf length.
349 */
350 error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp);
351 if (error) {
352 goto error0;
353 }
354 ASSERT(bp);
355 agf = XFS_BUF_TO_AGF(bp);
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800356 be32_add_cpu(&agf->agf_length, new);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100357 ASSERT(be32_to_cpu(agf->agf_length) ==
358 be32_to_cpu(agi->agi_length));
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000359
Tim Shimmin0164af52007-06-18 16:50:08 +1000360 xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 /*
362 * Free the new space.
363 */
364 error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno,
Christoph Hellwig16259e72005-11-02 15:11:25 +1100365 be32_to_cpu(agf->agf_length) - new), new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 if (error) {
367 goto error0;
368 }
369 }
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000370
371 /*
372 * Update changed superblock fields transactionally. These are not
373 * seen by the rest of the world until the transaction commit applies
374 * them atomically to the superblock.
375 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 if (nagcount > oagcount)
377 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount);
378 if (nb > mp->m_sb.sb_dblocks)
379 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS,
380 nb - mp->m_sb.sb_dblocks);
381 if (nfree)
382 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree);
383 if (dpct)
384 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
Eric Sandeen1c72bf92007-05-08 13:48:42 +1000385 error = xfs_trans_commit(tp, 0);
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000386 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 return error;
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000388
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 /* New allocation groups fully initialized, so update mount struct */
390 if (nagimax)
391 mp->m_maxagi = nagimax;
392 if (mp->m_sb.sb_imax_pct) {
393 __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
394 do_div(icount, 100);
395 mp->m_maxicount = icount << mp->m_sb.sb_inopblog;
396 } else
397 mp->m_maxicount = 0;
Dave Chinner055388a2011-01-04 11:35:03 +1100398 xfs_set_low_space_thresholds(mp);
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000399
400 /* update secondary superblocks. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 for (agno = 1; agno < nagcount; agno++) {
Dave Chinner7ca790a2012-04-23 15:58:55 +1000402 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
404 XFS_FSS_TO_BB(mp, 1), 0, &bp);
405 if (error) {
Dave Chinner53487782011-03-07 10:05:35 +1100406 xfs_warn(mp,
407 "error %d reading secondary superblock for ag %d",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 error, agno);
409 break;
410 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000411 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 /*
413 * If we get an error writing out the alternate superblocks,
414 * just issue a warning and continue. The real work is
415 * already done and committed.
416 */
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000417 error = xfs_bwrite(bp);
418 xfs_buf_relse(bp);
419 if (error) {
Dave Chinner53487782011-03-07 10:05:35 +1100420 xfs_warn(mp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 "write error %d updating secondary superblock for ag %d",
422 error, agno);
423 break; /* no point in continuing */
424 }
425 }
426 return 0;
427
428 error0:
429 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
430 return error;
431}
432
433static int
434xfs_growfs_log_private(
435 xfs_mount_t *mp, /* mount point for filesystem */
436 xfs_growfs_log_t *in) /* growfs log input struct */
437{
438 xfs_extlen_t nb;
439
440 nb = in->newblocks;
441 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
442 return XFS_ERROR(EINVAL);
443 if (nb == mp->m_sb.sb_logblocks &&
444 in->isint == (mp->m_sb.sb_logstart != 0))
445 return XFS_ERROR(EINVAL);
446 /*
447 * Moving the log is hard, need new interfaces to sync
448 * the log first, hold off all activity while moving it.
449 * Can have shorter or longer log in the same space,
450 * or transform internal to external log or vice versa.
451 */
452 return XFS_ERROR(ENOSYS);
453}
454
455/*
456 * protected versions of growfs function acquire and release locks on the mount
457 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG,
458 * XFS_IOC_FSGROWFSRT
459 */
460
461
462int
463xfs_growfs_data(
464 xfs_mount_t *mp,
465 xfs_growfs_data_t *in)
466{
467 int error;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600468
469 if (!capable(CAP_SYS_ADMIN))
470 return XFS_ERROR(EPERM);
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000471 if (!mutex_trylock(&mp->m_growlock))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 return XFS_ERROR(EWOULDBLOCK);
473 error = xfs_growfs_data_private(mp, in);
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000474 mutex_unlock(&mp->m_growlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 return error;
476}
477
478int
479xfs_growfs_log(
480 xfs_mount_t *mp,
481 xfs_growfs_log_t *in)
482{
483 int error;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600484
485 if (!capable(CAP_SYS_ADMIN))
486 return XFS_ERROR(EPERM);
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000487 if (!mutex_trylock(&mp->m_growlock))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 return XFS_ERROR(EWOULDBLOCK);
489 error = xfs_growfs_log_private(mp, in);
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000490 mutex_unlock(&mp->m_growlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 return error;
492}
493
494/*
495 * exported through ioctl XFS_IOC_FSCOUNTS
496 */
497
498int
499xfs_fs_counts(
500 xfs_mount_t *mp,
501 xfs_fsop_counts_t *cnt)
502{
Christoph Hellwigd4d90b52008-04-22 17:34:37 +1000503 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT);
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000504 spin_lock(&mp->m_sb_lock);
David Chinner4be536d2006-09-07 14:26:50 +1000505 cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 cnt->freertx = mp->m_sb.sb_frextents;
507 cnt->freeino = mp->m_sb.sb_ifree;
508 cnt->allocino = mp->m_sb.sb_icount;
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000509 spin_unlock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 return 0;
511}
512
513/*
514 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS
515 *
516 * xfs_reserve_blocks is called to set m_resblks
517 * in the in-core mount table. The number of unused reserved blocks
Nathan Scottc41564b2006-03-29 08:55:14 +1000518 * is kept in m_resblks_avail.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 *
520 * Reserve the requested number of blocks if available. Otherwise return
521 * as many as possible to satisfy the request. The actual number
522 * reserved are returned in outval
523 *
524 * A null inval pointer indicates that only the current reserved blocks
525 * available should be returned no settings are changed.
526 */
527
528int
529xfs_reserve_blocks(
530 xfs_mount_t *mp,
531 __uint64_t *inval,
532 xfs_fsop_resblks_t *outval)
533{
David Chinnerdbcabad2007-02-10 18:36:17 +1100534 __int64_t lcounter, delta, fdblks_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 __uint64_t request;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
537 /* If inval is null, report current values and return */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 if (inval == (__uint64_t *)NULL) {
David Chinner84e1e992007-06-18 16:50:27 +1000539 if (!outval)
540 return EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 outval->resblks = mp->m_resblks;
542 outval->resblks_avail = mp->m_resblks_avail;
Jesper Juhl014c2542006-01-15 02:37:08 +0100543 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 }
545
546 request = *inval;
David Chinnerdbcabad2007-02-10 18:36:17 +1100547
548 /*
549 * With per-cpu counters, this becomes an interesting
550 * problem. we needto work out if we are freeing or allocation
551 * blocks first, then we can do the modification as necessary.
552 *
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000553 * We do this under the m_sb_lock so that if we are near
David Chinnerdbcabad2007-02-10 18:36:17 +1100554 * ENOSPC, we will hold out any changes while we work out
555 * what to do. This means that the amount of free space can
556 * change while we do this, so we need to retry if we end up
557 * trying to reserve more space than is available.
558 *
559 * We also use the xfs_mod_incore_sb() interface so that we
560 * don't have to care about whether per cpu counter are
561 * enabled, disabled or even compiled in....
562 */
563retry:
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000564 spin_lock(&mp->m_sb_lock);
Christoph Hellwigd4d90b52008-04-22 17:34:37 +1000565 xfs_icsb_sync_counters_locked(mp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
567 /*
568 * If our previous reservation was larger than the current value,
569 * then move any unused blocks back to the free pool.
570 */
David Chinnerdbcabad2007-02-10 18:36:17 +1100571 fdblks_delta = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 if (mp->m_resblks > request) {
573 lcounter = mp->m_resblks_avail - request;
574 if (lcounter > 0) { /* release unused blocks */
David Chinnerdbcabad2007-02-10 18:36:17 +1100575 fdblks_delta = lcounter;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 mp->m_resblks_avail -= lcounter;
577 }
578 mp->m_resblks = request;
579 } else {
David Chinner4be536d2006-09-07 14:26:50 +1000580 __int64_t free;
581
582 free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
David Chinnerdbcabad2007-02-10 18:36:17 +1100583 if (!free)
584 goto out; /* ENOSPC and fdblks_delta = 0 */
585
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 delta = request - mp->m_resblks;
David Chinner4be536d2006-09-07 14:26:50 +1000587 lcounter = free - delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 if (lcounter < 0) {
589 /* We can't satisfy the request, just get what we can */
David Chinner4be536d2006-09-07 14:26:50 +1000590 mp->m_resblks += free;
591 mp->m_resblks_avail += free;
David Chinnerdbcabad2007-02-10 18:36:17 +1100592 fdblks_delta = -free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 } else {
David Chinnerdbcabad2007-02-10 18:36:17 +1100594 fdblks_delta = -delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 mp->m_resblks = request;
596 mp->m_resblks_avail += delta;
597 }
598 }
David Chinnerdbcabad2007-02-10 18:36:17 +1100599out:
David Chinner84e1e992007-06-18 16:50:27 +1000600 if (outval) {
601 outval->resblks = mp->m_resblks;
602 outval->resblks_avail = mp->m_resblks_avail;
603 }
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000604 spin_unlock(&mp->m_sb_lock);
David Chinnerdbcabad2007-02-10 18:36:17 +1100605
606 if (fdblks_delta) {
607 /*
608 * If we are putting blocks back here, m_resblks_avail is
Malcolm Parsons9da096f2009-03-29 09:55:42 +0200609 * already at its max so this will put it in the free pool.
David Chinnerdbcabad2007-02-10 18:36:17 +1100610 *
611 * If we need space, we'll either succeed in getting it
612 * from the free block count or we'll get an enospc. If
613 * we get a ENOSPC, it means things changed while we were
614 * calculating fdblks_delta and so we should try again to
615 * see if there is anything left to reserve.
616 *
617 * Don't set the reserved flag here - we don't want to reserve
618 * the extra reserve blocks from the reserve.....
619 */
620 int error;
Christoph Hellwig96540c72010-09-30 02:25:55 +0000621 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
622 fdblks_delta, 0);
David Chinnerdbcabad2007-02-10 18:36:17 +1100623 if (error == ENOSPC)
624 goto retry;
625 }
Jesper Juhl014c2542006-01-15 02:37:08 +0100626 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627}
628
Dave Chinner1a387d32010-08-24 11:46:31 +1000629/*
630 * Dump a transaction into the log that contains no real change. This is needed
631 * to be able to make the log dirty or stamp the current tail LSN into the log
632 * during the covering operation.
633 *
634 * We cannot use an inode here for this - that will push dirty state back up
635 * into the VFS and then periodic inode flushing will prevent log covering from
Dave Chinnerc58efdb2011-01-04 04:49:29 +0000636 * making progress. Hence we log a field in the superblock instead and use a
637 * synchronous transaction to ensure the superblock is immediately unpinned
638 * and can be written back.
Dave Chinner1a387d32010-08-24 11:46:31 +1000639 */
Takashi Satoc4be0c12009-01-09 16:40:58 -0800640int
Nathan Scott421ad132006-06-09 17:12:46 +1000641xfs_fs_log_dummy(
Dave Chinnerc58efdb2011-01-04 04:49:29 +0000642 xfs_mount_t *mp)
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100643{
Nathan Scott421ad132006-06-09 17:12:46 +1000644 xfs_trans_t *tp;
Takashi Satoc4be0c12009-01-09 16:40:58 -0800645 int error;
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100646
Christoph Hellwig80641dc2009-10-19 04:00:03 +0000647 tp = _xfs_trans_alloc(mp, XFS_TRANS_DUMMY1, KM_SLEEP);
Dave Chinner1a387d32010-08-24 11:46:31 +1000648 error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
649 XFS_DEFAULT_LOG_COUNT);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800650 if (error) {
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100651 xfs_trans_cancel(tp, 0);
Takashi Satoc4be0c12009-01-09 16:40:58 -0800652 return error;
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100653 }
654
Dave Chinner1a387d32010-08-24 11:46:31 +1000655 /* log the UUID because it is an unchanging field */
656 xfs_mod_sb(tp, XFS_SB_UUID);
Dave Chinnerc58efdb2011-01-04 04:49:29 +0000657 xfs_trans_set_sync(tp);
Dave Chinner1a387d32010-08-24 11:46:31 +1000658 return xfs_trans_commit(tp, 0);
Christoph Hellwige13a73f2006-01-11 15:30:08 +1100659}
660
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661int
662xfs_fs_goingdown(
663 xfs_mount_t *mp,
664 __uint32_t inflags)
665{
666 switch (inflags) {
667 case XFS_FSOP_GOING_FLAGS_DEFAULT: {
Christoph Hellwigb267ce92007-08-30 17:21:30 +1000668 struct super_block *sb = freeze_bdev(mp->m_super->s_bdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669
Christoph Hellwigf33c6792005-11-25 16:41:47 +1100670 if (sb && !IS_ERR(sb)) {
Nathan Scott7d04a332006-06-09 14:58:38 +1000671 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 thaw_bdev(sb->s_bdev, sb);
673 }
Barry Naujok189f4bf2008-05-21 16:58:55 +1000674
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 break;
676 }
677 case XFS_FSOP_GOING_FLAGS_LOGFLUSH:
Nathan Scott7d04a332006-06-09 14:58:38 +1000678 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 break;
680 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH:
Nathan Scott7d04a332006-06-09 14:58:38 +1000681 xfs_force_shutdown(mp,
682 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 break;
684 default:
685 return XFS_ERROR(EINVAL);
686 }
687
688 return 0;
689}
Dave Chinner2af51f32012-04-23 15:59:03 +1000690
691/*
692 * Force a shutdown of the filesystem instantly while keeping the filesystem
693 * consistent. We don't do an unmount here; just shutdown the shop, make sure
694 * that absolutely nothing persistent happens to this filesystem after this
695 * point.
696 */
697void
698xfs_do_force_shutdown(
699 xfs_mount_t *mp,
700 int flags,
701 char *fname,
702 int lnnum)
703{
704 int logerror;
705
706 logerror = flags & SHUTDOWN_LOG_IO_ERROR;
707
708 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
709 xfs_notice(mp,
710 "%s(0x%x) called from line %d of file %s. Return address = 0x%p",
711 __func__, flags, lnnum, fname, __return_address);
712 }
713 /*
714 * No need to duplicate efforts.
715 */
716 if (XFS_FORCED_SHUTDOWN(mp) && !logerror)
717 return;
718
719 /*
720 * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't
721 * queue up anybody new on the log reservations, and wakes up
722 * everybody who's sleeping on log reservations to tell them
723 * the bad news.
724 */
725 if (xfs_log_force_umount(mp, logerror))
726 return;
727
728 if (flags & SHUTDOWN_CORRUPT_INCORE) {
729 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT,
730 "Corruption of in-memory data detected. Shutting down filesystem");
731 if (XFS_ERRLEVEL_HIGH <= xfs_error_level)
732 xfs_stack_trace();
733 } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
734 if (logerror) {
735 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR,
736 "Log I/O Error Detected. Shutting down filesystem");
737 } else if (flags & SHUTDOWN_DEVICE_REQ) {
738 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
739 "All device paths lost. Shutting down filesystem");
740 } else if (!(flags & SHUTDOWN_REMOTE_REQ)) {
741 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
742 "I/O Error Detected. Shutting down filesystem");
743 }
744 }
745 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
746 xfs_alert(mp,
747 "Please umount the filesystem and rectify the problem(s)");
748 }
749}