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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"
Dave Chinner70a98832013-10-23 10:36:05 +110020#include "xfs_shared.h"
Dave Chinner239880e2013-10-23 10:50:10 +110021#include "xfs_format.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110022#include "xfs_log_format.h"
Dave Chinner239880e2013-10-23 10:50:10 +110023#include "xfs_trans_resv.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "xfs_sb.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "xfs_mount.h"
Dave Chinner8f661932014-06-06 15:15:59 +100026#include "xfs_da_format.h"
27#include "xfs_da_btree.h"
Nathan Scotta844f452005-11-02 14:38:42 +110028#include "xfs_inode.h"
Dave Chinner239880e2013-10-23 10:50:10 +110029#include "xfs_trans.h"
Nathan Scotta844f452005-11-02 14:38:42 +110030#include "xfs_inode_item.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "xfs_error.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110032#include "xfs_btree.h"
33#include "xfs_alloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#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"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000040#include "xfs_trace.h"
Dave Chinner239880e2013-10-23 10:50:10 +110041#include "xfs_log.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110042#include "xfs_filestream.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
44/*
45 * File system operations
46 */
47
48int
49xfs_fs_geometry(
50 xfs_mount_t *mp,
51 xfs_fsop_geom_t *geo,
52 int new_version)
53{
Dan Rosenbergc4d0c3b2011-02-14 13:45:28 +000054
55 memset(geo, 0, sizeof(*geo));
56
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 geo->blocksize = mp->m_sb.sb_blocksize;
58 geo->rtextsize = mp->m_sb.sb_rextsize;
59 geo->agblocks = mp->m_sb.sb_agblocks;
60 geo->agcount = mp->m_sb.sb_agcount;
61 geo->logblocks = mp->m_sb.sb_logblocks;
62 geo->sectsize = mp->m_sb.sb_sectsize;
63 geo->inodesize = mp->m_sb.sb_inodesize;
64 geo->imaxpct = mp->m_sb.sb_imax_pct;
65 geo->datablocks = mp->m_sb.sb_dblocks;
66 geo->rtblocks = mp->m_sb.sb_rblocks;
67 geo->rtextents = mp->m_sb.sb_rextents;
68 geo->logstart = mp->m_sb.sb_logstart;
69 ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid));
70 memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid));
71 if (new_version >= 2) {
72 geo->sunit = mp->m_sb.sb_unit;
73 geo->swidth = mp->m_sb.sb_width;
74 }
75 if (new_version >= 3) {
76 geo->version = XFS_FSOP_GEOM_VERSION;
Dave Chinner263997a2014-05-20 07:46:40 +100077 geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK |
Dave Chinner5d074a42014-05-20 07:46:55 +100078 XFS_FSOP_GEOM_FLAGS_DIRV2 |
Eric Sandeen62118702008-03-06 13:44:28 +110079 (xfs_sb_version_hasattr(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 XFS_FSOP_GEOM_FLAGS_ATTR : 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_hasextflgbit(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110089 (xfs_sb_version_hassector(&mp->m_sb) ?
Nathan Scottd8cc8902005-11-02 10:34:53 +110090 XFS_FSOP_GEOM_FLAGS_SECTOR : 0) |
Barry Naujok189f4bf2008-05-21 16:58:55 +100091 (xfs_sb_version_hasasciici(&mp->m_sb) ?
92 XFS_FSOP_GEOM_FLAGS_DIRV2CI : 0) |
David Chinner92821e22007-05-24 15:26:31 +100093 (xfs_sb_version_haslazysbcount(&mp->m_sb) ?
94 XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) |
Eric Sandeen62118702008-03-06 13:44:28 +110095 (xfs_sb_version_hasattr2(&mp->m_sb) ?
Eric Sandeen69a58a42012-10-09 14:11:45 -050096 XFS_FSOP_GEOM_FLAGS_ATTR2 : 0) |
97 (xfs_sb_version_hasprojid32bit(&mp->m_sb) ?
Dave Chinner74137fff2013-05-27 16:38:26 +100098 XFS_FSOP_GEOM_FLAGS_PROJID32 : 0) |
99 (xfs_sb_version_hascrc(&mp->m_sb) ?
Mark Tinguely2900a572013-10-02 16:00:06 -0500100 XFS_FSOP_GEOM_FLAGS_V5SB : 0) |
101 (xfs_sb_version_hasftype(&mp->m_sb) ?
Brian Foster0c153c12014-04-24 16:01:41 +1000102 XFS_FSOP_GEOM_FLAGS_FTYPE : 0) |
103 (xfs_sb_version_hasfinobt(&mp->m_sb) ?
Brian Foster502a4e72015-05-29 08:58:32 +1000104 XFS_FSOP_GEOM_FLAGS_FINOBT : 0) |
105 (xfs_sb_version_hassparseinodes(&mp->m_sb) ?
106 XFS_FSOP_GEOM_FLAGS_SPINODES : 0);
Eric Sandeen62118702008-03-06 13:44:28 +1100107 geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 mp->m_sb.sb_logsectsize : BBSIZE;
109 geo->rtsectsize = mp->m_sb.sb_blocksize;
Dave Chinner8f661932014-06-06 15:15:59 +1000110 geo->dirblocksize = mp->m_dir_geo->blksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 }
112 if (new_version >= 4) {
113 geo->flags |=
Eric Sandeen62118702008-03-06 13:44:28 +1100114 (xfs_sb_version_haslogv2(&mp->m_sb) ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 XFS_FSOP_GEOM_FLAGS_LOGV2 : 0);
116 geo->logsunit = mp->m_sb.sb_logsunit;
117 }
118 return 0;
119}
120
Dave Chinnerfd236832012-11-12 22:53:59 +1100121static struct xfs_buf *
122xfs_growfs_get_hdr_buf(
123 struct xfs_mount *mp,
124 xfs_daddr_t blkno,
125 size_t numblks,
Dave Chinner1813dd62012-11-14 17:54:40 +1100126 int flags,
127 const struct xfs_buf_ops *ops)
Dave Chinnerfd236832012-11-12 22:53:59 +1100128{
129 struct xfs_buf *bp;
130
131 bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags);
132 if (!bp)
133 return NULL;
134
135 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
136 bp->b_bn = blkno;
137 bp->b_maps[0].bm_bn = blkno;
Dave Chinner1813dd62012-11-14 17:54:40 +1100138 bp->b_ops = ops;
Dave Chinnerfd236832012-11-12 22:53:59 +1100139
140 return bp;
141}
142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143static int
144xfs_growfs_data_private(
145 xfs_mount_t *mp, /* mount point for filesystem */
146 xfs_growfs_data_t *in) /* growfs data input struct */
147{
148 xfs_agf_t *agf;
Dave Chinnerde497682012-11-12 22:54:00 +1100149 struct xfs_agfl *agfl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 xfs_agi_t *agi;
151 xfs_agnumber_t agno;
152 xfs_extlen_t agsize;
153 xfs_extlen_t tmpsize;
154 xfs_alloc_rec_t *arec;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 xfs_buf_t *bp;
156 int bucket;
157 int dpct;
Eric Sandeen59e5a0e2013-10-11 14:14:05 -0500158 int error, saved_error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 xfs_agnumber_t nagcount;
160 xfs_agnumber_t nagimax = 0;
161 xfs_rfsblock_t nb, nb_mod;
162 xfs_rfsblock_t new;
163 xfs_rfsblock_t nfree;
164 xfs_agnumber_t oagcount;
165 int pct;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 xfs_trans_t *tp;
167
168 nb = in->newblocks;
169 pct = in->imaxpct;
170 if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100)
Dave Chinner24513372014-06-25 14:58:08 +1000171 return -EINVAL;
Nathan Scott4cc929e2007-05-14 18:24:02 +1000172 if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb)))
173 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 dpct = pct - mp->m_sb.sb_imax_pct;
Dave Chinnerba372672014-10-02 09:05:32 +1000175 error = xfs_buf_read_uncached(mp->m_ddev_targp,
Dave Chinner1922c942010-09-22 10:47:20 +1000176 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
Dave Chinnerba372672014-10-02 09:05:32 +1000177 XFS_FSS_TO_BB(mp, 1), 0, &bp, NULL);
178 if (error)
Dave Chinnereab4e632012-11-12 22:54:02 +1100179 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 xfs_buf_relse(bp);
181
182 new = nb; /* use new as a temporary here */
183 nb_mod = do_div(new, mp->m_sb.sb_agblocks);
184 nagcount = new + (nb_mod != 0);
185 if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) {
186 nagcount--;
Eric Sandeene6da7c92009-05-23 14:30:12 -0500187 nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 if (nb < mp->m_sb.sb_dblocks)
Dave Chinner24513372014-06-25 14:58:08 +1000189 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 }
191 new = nb - mp->m_sb.sb_dblocks;
192 oagcount = mp->m_sb.sb_agcount;
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000193
194 /* allocate the new per-ag structures */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 if (nagcount > oagcount) {
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000196 error = xfs_initialize_perag(mp, nagcount, &nagimax);
197 if (error)
198 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 }
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS);
David Chinner84e1e992007-06-18 16:50:27 +1000202 tp->t_flags |= XFS_TRANS_RESERVE;
Jie Liu3d3c8b52013-08-12 20:49:59 +1000203 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_growdata,
204 XFS_GROWFS_SPACE_RES(mp), 0);
205 if (error) {
Christoph Hellwig4906e212015-06-04 13:47:56 +1000206 xfs_trans_cancel(tp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 return error;
208 }
209
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000210 /*
211 * Write new AG headers to disk. Non-transactional, but written
212 * synchronously so they are completed prior to the growfs transaction
213 * being logged.
214 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 nfree = 0;
216 for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) {
Dave Chinnerf94c4452013-11-21 15:41:06 +1100217 __be32 *agfl_bno;
218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 /*
Dave Chinnerde497682012-11-12 22:54:00 +1100220 * AG freespace header block
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 */
Dave Chinnerfd236832012-11-12 22:53:59 +1100222 bp = xfs_growfs_get_hdr_buf(mp,
223 XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
Dave Chinner1813dd62012-11-14 17:54:40 +1100224 XFS_FSS_TO_BB(mp, 1), 0,
225 &xfs_agf_buf_ops);
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000226 if (!bp) {
Dave Chinner24513372014-06-25 14:58:08 +1000227 error = -ENOMEM;
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000228 goto error0;
229 }
Dave Chinnerfd236832012-11-12 22:53:59 +1100230
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 agf = XFS_BUF_TO_AGF(bp);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100232 agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
233 agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
234 agf->agf_seqno = cpu_to_be32(agno);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 if (agno == nagcount - 1)
236 agsize =
237 nb -
238 (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks);
239 else
240 agsize = mp->m_sb.sb_agblocks;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100241 agf->agf_length = cpu_to_be32(agsize);
242 agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp));
243 agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp));
244 agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1);
245 agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 agf->agf_flfirst = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100247 agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 agf->agf_flcount = 0;
249 tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100250 agf->agf_freeblks = cpu_to_be32(tmpsize);
251 agf->agf_longest = cpu_to_be32(tmpsize);
Dave Chinner4e0e6042013-04-03 16:11:13 +1100252 if (xfs_sb_version_hascrc(&mp->m_sb))
Dave Chinnerac383de2015-08-19 10:31:41 +1000253 uuid_copy(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid);
Dave Chinner4e0e6042013-04-03 16:11:13 +1100254
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000255 error = xfs_bwrite(bp);
256 xfs_buf_relse(bp);
257 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 goto error0;
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000259
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 /*
Dave Chinnerde497682012-11-12 22:54:00 +1100261 * AG freelist header block
262 */
263 bp = xfs_growfs_get_hdr_buf(mp,
264 XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)),
Dave Chinner1813dd62012-11-14 17:54:40 +1100265 XFS_FSS_TO_BB(mp, 1), 0,
266 &xfs_agfl_buf_ops);
Dave Chinnerde497682012-11-12 22:54:00 +1100267 if (!bp) {
Dave Chinner24513372014-06-25 14:58:08 +1000268 error = -ENOMEM;
Dave Chinnerde497682012-11-12 22:54:00 +1100269 goto error0;
270 }
271
272 agfl = XFS_BUF_TO_AGFL(bp);
Christoph Hellwig77c95bb2013-04-03 16:11:14 +1100273 if (xfs_sb_version_hascrc(&mp->m_sb)) {
274 agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC);
275 agfl->agfl_seqno = cpu_to_be32(agno);
Dave Chinnerac383de2015-08-19 10:31:41 +1000276 uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid);
Christoph Hellwig77c95bb2013-04-03 16:11:14 +1100277 }
Dave Chinnerf94c4452013-11-21 15:41:06 +1100278
279 agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, bp);
Dave Chinnerde497682012-11-12 22:54:00 +1100280 for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++)
Dave Chinnerf94c4452013-11-21 15:41:06 +1100281 agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);
Dave Chinnerde497682012-11-12 22:54:00 +1100282
283 error = xfs_bwrite(bp);
284 xfs_buf_relse(bp);
285 if (error)
286 goto error0;
287
288 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 * AG inode header block
290 */
Dave Chinnerfd236832012-11-12 22:53:59 +1100291 bp = xfs_growfs_get_hdr_buf(mp,
292 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
Dave Chinner1813dd62012-11-14 17:54:40 +1100293 XFS_FSS_TO_BB(mp, 1), 0,
294 &xfs_agi_buf_ops);
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000295 if (!bp) {
Dave Chinner24513372014-06-25 14:58:08 +1000296 error = -ENOMEM;
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000297 goto error0;
298 }
Dave Chinnerfd236832012-11-12 22:53:59 +1100299
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 agi = XFS_BUF_TO_AGI(bp);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100301 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
302 agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
303 agi->agi_seqno = cpu_to_be32(agno);
304 agi->agi_length = cpu_to_be32(agsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 agi->agi_count = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100306 agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp));
307 agi->agi_level = cpu_to_be32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 agi->agi_freecount = 0;
Christoph Hellwig16259e72005-11-02 15:11:25 +1100309 agi->agi_newino = cpu_to_be32(NULLAGINO);
310 agi->agi_dirino = cpu_to_be32(NULLAGINO);
Dave Chinner983d09f2013-04-03 16:11:15 +1100311 if (xfs_sb_version_hascrc(&mp->m_sb))
Dave Chinnerac383de2015-08-19 10:31:41 +1000312 uuid_copy(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid);
Brian Fostera3fa5162014-04-24 16:01:39 +1000313 if (xfs_sb_version_hasfinobt(&mp->m_sb)) {
314 agi->agi_free_root = cpu_to_be32(XFS_FIBT_BLOCK(mp));
315 agi->agi_free_level = cpu_to_be32(1);
316 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
Christoph Hellwig16259e72005-11-02 15:11:25 +1100318 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
Dave Chinner983d09f2013-04-03 16:11:15 +1100319
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000320 error = xfs_bwrite(bp);
321 xfs_buf_relse(bp);
322 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 goto error0;
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000324
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 /*
326 * BNO btree root block
327 */
Dave Chinnerfd236832012-11-12 22:53:59 +1100328 bp = xfs_growfs_get_hdr_buf(mp,
329 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
Dave Chinner1813dd62012-11-14 17:54:40 +1100330 BTOBB(mp->m_sb.sb_blocksize), 0,
331 &xfs_allocbt_buf_ops);
Dave Chinnerfd236832012-11-12 22:53:59 +1100332
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000333 if (!bp) {
Dave Chinner24513372014-06-25 14:58:08 +1000334 error = -ENOMEM;
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000335 goto error0;
336 }
Dave Chinnerb64f3a32012-11-13 16:40:27 -0600337
Christoph Hellwigee1a47a2013-04-21 14:53:46 -0500338 if (xfs_sb_version_hascrc(&mp->m_sb))
339 xfs_btree_init_block(mp, bp, XFS_ABTB_CRC_MAGIC, 0, 1,
340 agno, XFS_BTREE_CRC_BLOCKS);
341 else
342 xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1,
343 agno, 0);
344
Dave Chinnerb64f3a32012-11-13 16:40:27 -0600345 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100346 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
347 arec->ar_blockcount = cpu_to_be32(
348 agsize - be32_to_cpu(arec->ar_startblock));
Dave Chinnerb64f3a32012-11-13 16:40:27 -0600349
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000350 error = xfs_bwrite(bp);
351 xfs_buf_relse(bp);
352 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 goto error0;
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000354
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 /*
356 * CNT btree root block
357 */
Dave Chinnerfd236832012-11-12 22:53:59 +1100358 bp = xfs_growfs_get_hdr_buf(mp,
359 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
Dave Chinner1813dd62012-11-14 17:54:40 +1100360 BTOBB(mp->m_sb.sb_blocksize), 0,
361 &xfs_allocbt_buf_ops);
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000362 if (!bp) {
Dave Chinner24513372014-06-25 14:58:08 +1000363 error = -ENOMEM;
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000364 goto error0;
365 }
Dave Chinnerb64f3a32012-11-13 16:40:27 -0600366
Christoph Hellwigee1a47a2013-04-21 14:53:46 -0500367 if (xfs_sb_version_hascrc(&mp->m_sb))
368 xfs_btree_init_block(mp, bp, XFS_ABTC_CRC_MAGIC, 0, 1,
369 agno, XFS_BTREE_CRC_BLOCKS);
370 else
371 xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1,
372 agno, 0);
373
Dave Chinnerb64f3a32012-11-13 16:40:27 -0600374 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100375 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
376 arec->ar_blockcount = cpu_to_be32(
377 agsize - be32_to_cpu(arec->ar_startblock));
378 nfree += be32_to_cpu(arec->ar_blockcount);
Dave Chinnerb64f3a32012-11-13 16:40:27 -0600379
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000380 error = xfs_bwrite(bp);
381 xfs_buf_relse(bp);
382 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 goto error0;
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000384
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 /*
386 * INO btree root block
387 */
Dave Chinnerfd236832012-11-12 22:53:59 +1100388 bp = xfs_growfs_get_hdr_buf(mp,
389 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
Dave Chinner1813dd62012-11-14 17:54:40 +1100390 BTOBB(mp->m_sb.sb_blocksize), 0,
391 &xfs_inobt_buf_ops);
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000392 if (!bp) {
Dave Chinner24513372014-06-25 14:58:08 +1000393 error = -ENOMEM;
Chandra Seetharamanb5229502011-09-07 19:37:54 +0000394 goto error0;
395 }
Dave Chinnerfd236832012-11-12 22:53:59 +1100396
Christoph Hellwigee1a47a2013-04-21 14:53:46 -0500397 if (xfs_sb_version_hascrc(&mp->m_sb))
398 xfs_btree_init_block(mp, bp, XFS_IBT_CRC_MAGIC, 0, 0,
399 agno, XFS_BTREE_CRC_BLOCKS);
400 else
401 xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0,
402 agno, 0);
Dave Chinnerb64f3a32012-11-13 16:40:27 -0600403
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000404 error = xfs_bwrite(bp);
405 xfs_buf_relse(bp);
406 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 goto error0;
Brian Fostera3fa5162014-04-24 16:01:39 +1000408
409 /*
410 * FINO btree root block
411 */
412 if (xfs_sb_version_hasfinobt(&mp->m_sb)) {
413 bp = xfs_growfs_get_hdr_buf(mp,
414 XFS_AGB_TO_DADDR(mp, agno, XFS_FIBT_BLOCK(mp)),
415 BTOBB(mp->m_sb.sb_blocksize), 0,
416 &xfs_inobt_buf_ops);
417 if (!bp) {
Dave Chinner24513372014-06-25 14:58:08 +1000418 error = -ENOMEM;
Brian Fostera3fa5162014-04-24 16:01:39 +1000419 goto error0;
420 }
421
422 if (xfs_sb_version_hascrc(&mp->m_sb))
423 xfs_btree_init_block(mp, bp, XFS_FIBT_CRC_MAGIC,
424 0, 0, agno,
425 XFS_BTREE_CRC_BLOCKS);
426 else
427 xfs_btree_init_block(mp, bp, XFS_FIBT_MAGIC, 0,
428 0, agno, 0);
429
430 error = xfs_bwrite(bp);
431 xfs_buf_relse(bp);
432 if (error)
433 goto error0;
434 }
435
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 }
437 xfs_trans_agblocks_delta(tp, nfree);
438 /*
439 * There are new blocks in the old last a.g.
440 */
441 if (new) {
442 /*
443 * Change the agi length.
444 */
445 error = xfs_ialloc_read_agi(mp, tp, agno, &bp);
446 if (error) {
447 goto error0;
448 }
449 ASSERT(bp);
450 agi = XFS_BUF_TO_AGI(bp);
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800451 be32_add_cpu(&agi->agi_length, new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 ASSERT(nagcount == oagcount ||
Christoph Hellwig16259e72005-11-02 15:11:25 +1100453 be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH);
455 /*
456 * Change agf length.
457 */
458 error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp);
459 if (error) {
460 goto error0;
461 }
462 ASSERT(bp);
463 agf = XFS_BUF_TO_AGF(bp);
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800464 be32_add_cpu(&agf->agf_length, new);
Christoph Hellwig16259e72005-11-02 15:11:25 +1100465 ASSERT(be32_to_cpu(agf->agf_length) ==
466 be32_to_cpu(agi->agi_length));
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000467
Tim Shimmin0164af52007-06-18 16:50:08 +1000468 xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 /*
470 * Free the new space.
471 */
472 error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno,
Christoph Hellwig16259e72005-11-02 15:11:25 +1100473 be32_to_cpu(agf->agf_length) - new), new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 if (error) {
475 goto error0;
476 }
477 }
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000478
479 /*
480 * Update changed superblock fields transactionally. These are not
481 * seen by the rest of the world until the transaction commit applies
482 * them atomically to the superblock.
483 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 if (nagcount > oagcount)
485 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount);
486 if (nb > mp->m_sb.sb_dblocks)
487 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS,
488 nb - mp->m_sb.sb_dblocks);
489 if (nfree)
490 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree);
491 if (dpct)
492 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
Christoph Hellwigf8079b82015-02-05 11:13:21 +1100493 xfs_trans_set_sync(tp);
Christoph Hellwig70393312015-06-04 13:48:08 +1000494 error = xfs_trans_commit(tp);
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000495 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 return error;
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000497
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 /* New allocation groups fully initialized, so update mount struct */
499 if (nagimax)
500 mp->m_maxagi = nagimax;
501 if (mp->m_sb.sb_imax_pct) {
502 __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
503 do_div(icount, 100);
504 mp->m_maxicount = icount << mp->m_sb.sb_inopblog;
505 } else
506 mp->m_maxicount = 0;
Dave Chinner055388a2011-01-04 11:35:03 +1100507 xfs_set_low_space_thresholds(mp);
Dave Chinner1c1c6eb2010-01-11 11:47:44 +0000508
509 /* update secondary superblocks. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 for (agno = 1; agno < nagcount; agno++) {
Dave Chinner1375cb62012-10-09 14:50:52 +1100511 error = 0;
512 /*
513 * new secondary superblocks need to be zeroed, not read from
514 * disk as the contents of the new area we are growing into is
515 * completely unknown.
516 */
517 if (agno < oagcount) {
518 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
Dave Chinner98021822012-11-12 22:54:03 +1100520 XFS_FSS_TO_BB(mp, 1), 0, &bp,
Dave Chinner1813dd62012-11-14 17:54:40 +1100521 &xfs_sb_buf_ops);
Dave Chinner1375cb62012-10-09 14:50:52 +1100522 } else {
523 bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp,
524 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
525 XFS_FSS_TO_BB(mp, 1), 0);
Dave Chinnerb0f539d2012-11-14 17:53:49 +1100526 if (bp) {
Dave Chinner1813dd62012-11-14 17:54:40 +1100527 bp->b_ops = &xfs_sb_buf_ops;
Dave Chinner1375cb62012-10-09 14:50:52 +1100528 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
Dave Chinnerb0f539d2012-11-14 17:53:49 +1100529 } else
Dave Chinner24513372014-06-25 14:58:08 +1000530 error = -ENOMEM;
Dave Chinner1375cb62012-10-09 14:50:52 +1100531 }
532
Eric Sandeen59e5a0e2013-10-11 14:14:05 -0500533 /*
534 * If we get an error reading or writing alternate superblocks,
535 * continue. xfs_repair chooses the "best" superblock based
536 * on most matches; if we break early, we'll leave more
537 * superblocks un-updated than updated, and xfs_repair may
538 * pick them over the properly-updated primary.
539 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 if (error) {
Dave Chinner53487782011-03-07 10:05:35 +1100541 xfs_warn(mp,
542 "error %d reading secondary superblock for ag %d",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 error, agno);
Eric Sandeen59e5a0e2013-10-11 14:14:05 -0500544 saved_error = error;
545 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 }
Dave Chinner4d11a402015-01-22 09:10:26 +1100547 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb);
Dave Chinner98021822012-11-12 22:54:03 +1100548
Christoph Hellwigc2b006c2011-08-23 08:28:07 +0000549 error = xfs_bwrite(bp);
550 xfs_buf_relse(bp);
551 if (error) {
Dave Chinner53487782011-03-07 10:05:35 +1100552 xfs_warn(mp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 "write error %d updating secondary superblock for ag %d",
554 error, agno);
Eric Sandeen59e5a0e2013-10-11 14:14:05 -0500555 saved_error = error;
556 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 }
558 }
Eric Sandeen59e5a0e2013-10-11 14:14:05 -0500559 return saved_error ? saved_error : error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
561 error0:
Christoph Hellwig4906e212015-06-04 13:47:56 +1000562 xfs_trans_cancel(tp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 return error;
564}
565
566static int
567xfs_growfs_log_private(
568 xfs_mount_t *mp, /* mount point for filesystem */
569 xfs_growfs_log_t *in) /* growfs log input struct */
570{
571 xfs_extlen_t nb;
572
573 nb = in->newblocks;
574 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
Dave Chinner24513372014-06-25 14:58:08 +1000575 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 if (nb == mp->m_sb.sb_logblocks &&
577 in->isint == (mp->m_sb.sb_logstart != 0))
Dave Chinner24513372014-06-25 14:58:08 +1000578 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 /*
580 * Moving the log is hard, need new interfaces to sync
581 * the log first, hold off all activity while moving it.
582 * Can have shorter or longer log in the same space,
583 * or transform internal to external log or vice versa.
584 */
Dave Chinner24513372014-06-25 14:58:08 +1000585 return -ENOSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586}
587
588/*
589 * protected versions of growfs function acquire and release locks on the mount
590 * point - exported through ioctls: XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG,
591 * XFS_IOC_FSGROWFSRT
592 */
593
594
595int
596xfs_growfs_data(
597 xfs_mount_t *mp,
598 xfs_growfs_data_t *in)
599{
600 int error;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600601
602 if (!capable(CAP_SYS_ADMIN))
Dave Chinner24513372014-06-25 14:58:08 +1000603 return -EPERM;
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000604 if (!mutex_trylock(&mp->m_growlock))
Dave Chinner24513372014-06-25 14:58:08 +1000605 return -EWOULDBLOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 error = xfs_growfs_data_private(mp, in);
Christoph Hellwig52785112015-02-16 11:49:23 +1100607 /*
608 * Increment the generation unconditionally, the error could be from
609 * updating the secondary superblocks, in which case the new size
610 * is live already.
611 */
612 mp->m_generation++;
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000613 mutex_unlock(&mp->m_growlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 return error;
615}
616
617int
618xfs_growfs_log(
619 xfs_mount_t *mp,
620 xfs_growfs_log_t *in)
621{
622 int error;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600623
624 if (!capable(CAP_SYS_ADMIN))
Dave Chinner24513372014-06-25 14:58:08 +1000625 return -EPERM;
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000626 if (!mutex_trylock(&mp->m_growlock))
Dave Chinner24513372014-06-25 14:58:08 +1000627 return -EWOULDBLOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 error = xfs_growfs_log_private(mp, in);
Christoph Hellwigcc92e7a2007-08-30 17:21:54 +1000629 mutex_unlock(&mp->m_growlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 return error;
631}
632
633/*
634 * exported through ioctl XFS_IOC_FSCOUNTS
635 */
636
637int
638xfs_fs_counts(
639 xfs_mount_t *mp,
640 xfs_fsop_counts_t *cnt)
641{
Dave Chinner501ab322015-02-23 21:19:28 +1100642 cnt->allocino = percpu_counter_read_positive(&mp->m_icount);
Dave Chinnere88b64e2015-02-23 21:19:53 +1100643 cnt->freeino = percpu_counter_read_positive(&mp->m_ifree);
Dave Chinner0d485ad2015-02-23 21:22:03 +1100644 cnt->freedata = percpu_counter_read_positive(&mp->m_fdblocks) -
645 XFS_ALLOC_SET_ASIDE(mp);
Dave Chinner501ab322015-02-23 21:19:28 +1100646
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000647 spin_lock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 cnt->freertx = mp->m_sb.sb_frextents;
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000649 spin_unlock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 return 0;
651}
652
653/*
654 * exported through ioctl XFS_IOC_SET_RESBLKS & XFS_IOC_GET_RESBLKS
655 *
656 * xfs_reserve_blocks is called to set m_resblks
657 * in the in-core mount table. The number of unused reserved blocks
Nathan Scottc41564b2006-03-29 08:55:14 +1000658 * is kept in m_resblks_avail.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 *
660 * Reserve the requested number of blocks if available. Otherwise return
661 * as many as possible to satisfy the request. The actual number
662 * reserved are returned in outval
663 *
664 * A null inval pointer indicates that only the current reserved blocks
665 * available should be returned no settings are changed.
666 */
667
668int
669xfs_reserve_blocks(
670 xfs_mount_t *mp,
671 __uint64_t *inval,
672 xfs_fsop_resblks_t *outval)
673{
David Chinnerdbcabad2007-02-10 18:36:17 +1100674 __int64_t lcounter, delta, fdblks_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 __uint64_t request;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676
677 /* If inval is null, report current values and return */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 if (inval == (__uint64_t *)NULL) {
David Chinner84e1e992007-06-18 16:50:27 +1000679 if (!outval)
Dave Chinner24513372014-06-25 14:58:08 +1000680 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 outval->resblks = mp->m_resblks;
682 outval->resblks_avail = mp->m_resblks_avail;
Jesper Juhl014c2542006-01-15 02:37:08 +0100683 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 }
685
686 request = *inval;
David Chinnerdbcabad2007-02-10 18:36:17 +1100687
688 /*
689 * With per-cpu counters, this becomes an interesting
690 * problem. we needto work out if we are freeing or allocation
691 * blocks first, then we can do the modification as necessary.
692 *
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000693 * We do this under the m_sb_lock so that if we are near
David Chinnerdbcabad2007-02-10 18:36:17 +1100694 * ENOSPC, we will hold out any changes while we work out
695 * what to do. This means that the amount of free space can
696 * change while we do this, so we need to retry if we end up
697 * trying to reserve more space than is available.
David Chinnerdbcabad2007-02-10 18:36:17 +1100698 */
699retry:
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000700 spin_lock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
702 /*
703 * If our previous reservation was larger than the current value,
704 * then move any unused blocks back to the free pool.
705 */
David Chinnerdbcabad2007-02-10 18:36:17 +1100706 fdblks_delta = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 if (mp->m_resblks > request) {
708 lcounter = mp->m_resblks_avail - request;
709 if (lcounter > 0) { /* release unused blocks */
David Chinnerdbcabad2007-02-10 18:36:17 +1100710 fdblks_delta = lcounter;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 mp->m_resblks_avail -= lcounter;
712 }
713 mp->m_resblks = request;
714 } else {
David Chinner4be536d2006-09-07 14:26:50 +1000715 __int64_t free;
716
Dave Chinner0d485ad2015-02-23 21:22:03 +1100717 free = percpu_counter_sum(&mp->m_fdblocks) -
718 XFS_ALLOC_SET_ASIDE(mp);
David Chinnerdbcabad2007-02-10 18:36:17 +1100719 if (!free)
720 goto out; /* ENOSPC and fdblks_delta = 0 */
721
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 delta = request - mp->m_resblks;
David Chinner4be536d2006-09-07 14:26:50 +1000723 lcounter = free - delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 if (lcounter < 0) {
725 /* We can't satisfy the request, just get what we can */
David Chinner4be536d2006-09-07 14:26:50 +1000726 mp->m_resblks += free;
727 mp->m_resblks_avail += free;
David Chinnerdbcabad2007-02-10 18:36:17 +1100728 fdblks_delta = -free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 } else {
David Chinnerdbcabad2007-02-10 18:36:17 +1100730 fdblks_delta = -delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 mp->m_resblks = request;
732 mp->m_resblks_avail += delta;
733 }
734 }
David Chinnerdbcabad2007-02-10 18:36:17 +1100735out:
David Chinner84e1e992007-06-18 16:50:27 +1000736 if (outval) {
737 outval->resblks = mp->m_resblks;
738 outval->resblks_avail = mp->m_resblks_avail;
739 }
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000740 spin_unlock(&mp->m_sb_lock);
David Chinnerdbcabad2007-02-10 18:36:17 +1100741
742 if (fdblks_delta) {
743 /*
744 * If we are putting blocks back here, m_resblks_avail is
Malcolm Parsons9da096f2009-03-29 09:55:42 +0200745 * already at its max so this will put it in the free pool.
David Chinnerdbcabad2007-02-10 18:36:17 +1100746 *
747 * If we need space, we'll either succeed in getting it
748 * from the free block count or we'll get an enospc. If
749 * we get a ENOSPC, it means things changed while we were
750 * calculating fdblks_delta and so we should try again to
751 * see if there is anything left to reserve.
752 *
753 * Don't set the reserved flag here - we don't want to reserve
754 * the extra reserve blocks from the reserve.....
755 */
756 int error;
Dave Chinner0d485ad2015-02-23 21:22:03 +1100757 error = xfs_mod_fdblocks(mp, fdblks_delta, 0);
Dave Chinner24513372014-06-25 14:58:08 +1000758 if (error == -ENOSPC)
David Chinnerdbcabad2007-02-10 18:36:17 +1100759 goto retry;
760 }
Jesper Juhl014c2542006-01-15 02:37:08 +0100761 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762}
763
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764int
765xfs_fs_goingdown(
766 xfs_mount_t *mp,
767 __uint32_t inflags)
768{
769 switch (inflags) {
770 case XFS_FSOP_GOING_FLAGS_DEFAULT: {
Christoph Hellwigb267ce92007-08-30 17:21:30 +1000771 struct super_block *sb = freeze_bdev(mp->m_super->s_bdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772
Christoph Hellwigf33c6792005-11-25 16:41:47 +1100773 if (sb && !IS_ERR(sb)) {
Nathan Scott7d04a332006-06-09 14:58:38 +1000774 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 thaw_bdev(sb->s_bdev, sb);
776 }
Barry Naujok189f4bf2008-05-21 16:58:55 +1000777
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 break;
779 }
780 case XFS_FSOP_GOING_FLAGS_LOGFLUSH:
Nathan Scott7d04a332006-06-09 14:58:38 +1000781 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 break;
783 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH:
Nathan Scott7d04a332006-06-09 14:58:38 +1000784 xfs_force_shutdown(mp,
785 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 break;
787 default:
Dave Chinner24513372014-06-25 14:58:08 +1000788 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 }
790
791 return 0;
792}
Dave Chinner2af51f32012-04-23 15:59:03 +1000793
794/*
795 * Force a shutdown of the filesystem instantly while keeping the filesystem
796 * consistent. We don't do an unmount here; just shutdown the shop, make sure
797 * that absolutely nothing persistent happens to this filesystem after this
798 * point.
799 */
800void
801xfs_do_force_shutdown(
802 xfs_mount_t *mp,
803 int flags,
804 char *fname,
805 int lnnum)
806{
807 int logerror;
808
809 logerror = flags & SHUTDOWN_LOG_IO_ERROR;
810
811 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
812 xfs_notice(mp,
813 "%s(0x%x) called from line %d of file %s. Return address = 0x%p",
814 __func__, flags, lnnum, fname, __return_address);
815 }
816 /*
817 * No need to duplicate efforts.
818 */
819 if (XFS_FORCED_SHUTDOWN(mp) && !logerror)
820 return;
821
822 /*
823 * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't
824 * queue up anybody new on the log reservations, and wakes up
825 * everybody who's sleeping on log reservations to tell them
826 * the bad news.
827 */
828 if (xfs_log_force_umount(mp, logerror))
829 return;
830
831 if (flags & SHUTDOWN_CORRUPT_INCORE) {
832 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT,
833 "Corruption of in-memory data detected. Shutting down filesystem");
834 if (XFS_ERRLEVEL_HIGH <= xfs_error_level)
835 xfs_stack_trace();
836 } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
837 if (logerror) {
838 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR,
839 "Log I/O Error Detected. Shutting down filesystem");
840 } else if (flags & SHUTDOWN_DEVICE_REQ) {
841 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
842 "All device paths lost. Shutting down filesystem");
843 } else if (!(flags & SHUTDOWN_REMOTE_REQ)) {
844 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
845 "I/O Error Detected. Shutting down filesystem");
846 }
847 }
848 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
849 xfs_alert(mp,
850 "Please umount the filesystem and rectify the problem(s)");
851 }
852}