Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "xfs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include "xfs_fs.h" |
Dave Chinner | 70a9883c | 2013-10-23 10:36:05 +1100 | [diff] [blame] | 20 | #include "xfs_shared.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 21 | #include "xfs_format.h" |
| 22 | #include "xfs_log_format.h" |
| 23 | #include "xfs_trans_resv.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_sb.h" |
| 25 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "xfs_inode.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 28 | #include "xfs_btree.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 29 | #include "xfs_bmap_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include "xfs_bmap.h" |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 31 | #include "xfs_bmap_util.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include "xfs_error.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 33 | #include "xfs_trans.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include "xfs_trans_space.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include "xfs_iomap.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 36 | #include "xfs_trace.h" |
Brian Foster | 27b5286 | 2012-11-06 09:50:38 -0500 | [diff] [blame] | 37 | #include "xfs_icache.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 38 | #include "xfs_quota.h" |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 39 | #include "xfs_dquot_item.h" |
| 40 | #include "xfs_dquot.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 41 | #include "xfs_dinode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
| 44 | #define XFS_WRITEIO_ALIGN(mp,off) (((off) >> mp->m_writeio_log) \ |
| 45 | << mp->m_writeio_log) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #define XFS_WRITE_IMAPS XFS_BMAP_MAX_NMAP |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | STATIC int |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 49 | xfs_iomap_eof_align_last_fsb( |
| 50 | xfs_mount_t *mp, |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 51 | xfs_inode_t *ip, |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 52 | xfs_extlen_t extsize, |
| 53 | xfs_fileoff_t *last_fsb) |
| 54 | { |
| 55 | xfs_fileoff_t new_last_fsb = 0; |
Christoph Hellwig | bf322d9 | 2011-12-18 20:00:05 +0000 | [diff] [blame] | 56 | xfs_extlen_t align = 0; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 57 | int eof, error; |
| 58 | |
Christoph Hellwig | bf322d9 | 2011-12-18 20:00:05 +0000 | [diff] [blame] | 59 | if (!XFS_IS_REALTIME_INODE(ip)) { |
| 60 | /* |
| 61 | * Round up the allocation request to a stripe unit |
| 62 | * (m_dalign) boundary if the file size is >= stripe unit |
| 63 | * size, and we are allocating past the allocation eof. |
| 64 | * |
| 65 | * If mounted with the "-o swalloc" option the alignment is |
| 66 | * increased from the strip unit size to the stripe width. |
| 67 | */ |
| 68 | if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC)) |
| 69 | align = mp->m_swidth; |
| 70 | else if (mp->m_dalign) |
| 71 | align = mp->m_dalign; |
| 72 | |
Christoph Hellwig | ce7ae151 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 73 | if (align && XFS_ISIZE(ip) >= XFS_FSB_TO_B(mp, align)) |
Christoph Hellwig | bf322d9 | 2011-12-18 20:00:05 +0000 | [diff] [blame] | 74 | new_last_fsb = roundup_64(*last_fsb, align); |
| 75 | } |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 76 | |
| 77 | /* |
| 78 | * Always round up the allocation request to an extent boundary |
| 79 | * (when file on a real-time subvolume or has di_extsize hint). |
| 80 | */ |
| 81 | if (extsize) { |
| 82 | if (new_last_fsb) |
| 83 | align = roundup_64(new_last_fsb, extsize); |
| 84 | else |
| 85 | align = extsize; |
| 86 | new_last_fsb = roundup_64(*last_fsb, align); |
| 87 | } |
| 88 | |
| 89 | if (new_last_fsb) { |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 90 | error = xfs_bmap_eof(ip, new_last_fsb, XFS_DATA_FORK, &eof); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 91 | if (error) |
| 92 | return error; |
| 93 | if (eof) |
| 94 | *last_fsb = new_last_fsb; |
| 95 | } |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | STATIC int |
Dave Chinner | 6d4a8ec | 2011-03-07 10:06:35 +1100 | [diff] [blame] | 100 | xfs_alert_fsblock_zero( |
Nathan Scott | 572d95f | 2006-09-28 11:03:20 +1000 | [diff] [blame] | 101 | xfs_inode_t *ip, |
| 102 | xfs_bmbt_irec_t *imap) |
| 103 | { |
Dave Chinner | 6a19d93 | 2011-03-07 10:02:35 +1100 | [diff] [blame] | 104 | xfs_alert_tag(ip->i_mount, XFS_PTAG_FSBLOCK_ZERO, |
Nathan Scott | 572d95f | 2006-09-28 11:03:20 +1000 | [diff] [blame] | 105 | "Access to block zero in inode %llu " |
| 106 | "start_block: %llx start_off: %llx " |
Eric Sandeen | 08e96e1 | 2013-10-11 20:59:05 -0500 | [diff] [blame] | 107 | "blkcnt: %llx extent-state: %x", |
Nathan Scott | 572d95f | 2006-09-28 11:03:20 +1000 | [diff] [blame] | 108 | (unsigned long long)ip->i_ino, |
| 109 | (unsigned long long)imap->br_startblock, |
| 110 | (unsigned long long)imap->br_startoff, |
| 111 | (unsigned long long)imap->br_blockcount, |
| 112 | imap->br_state); |
| 113 | return EFSCORRUPTED; |
| 114 | } |
| 115 | |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 116 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | xfs_iomap_write_direct( |
| 118 | xfs_inode_t *ip, |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 119 | xfs_off_t offset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | size_t count, |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 121 | xfs_bmbt_irec_t *imap, |
Christoph Hellwig | 405f804 | 2010-12-10 08:42:19 +0000 | [diff] [blame] | 122 | int nmaps) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | { |
| 124 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | xfs_fileoff_t offset_fsb; |
| 126 | xfs_fileoff_t last_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 127 | xfs_filblks_t count_fsb, resaligned; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | xfs_fsblock_t firstfsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 129 | xfs_extlen_t extsz, temp; |
Eric Sandeen | 0116d93 | 2005-11-02 15:00:01 +1100 | [diff] [blame] | 130 | int nimaps; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | int bmapi_flag; |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 132 | int quota_flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | int rt; |
| 134 | xfs_trans_t *tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | xfs_bmap_free_t free_list; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 136 | uint qblocks, resblks, resrtextents; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | int committed; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 138 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 140 | error = xfs_qm_dqattach(ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | if (error) |
| 142 | return XFS_ERROR(error); |
| 143 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 144 | rt = XFS_IS_REALTIME_INODE(ip); |
David Chinner | 957d0eb | 2007-06-18 16:50:37 +1000 | [diff] [blame] | 145 | extsz = xfs_get_extsz_hint(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
David Chinner | 957d0eb | 2007-06-18 16:50:37 +1000 | [diff] [blame] | 147 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 148 | last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); |
Christoph Hellwig | ce7ae151 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 149 | if ((offset + count) > XFS_ISIZE(ip)) { |
Lachlan McIlroy | 9f6c92b | 2008-12-22 17:56:49 +1100 | [diff] [blame] | 150 | error = xfs_iomap_eof_align_last_fsb(mp, ip, extsz, &last_fsb); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 151 | if (error) |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 152 | return XFS_ERROR(error); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 153 | } else { |
Christoph Hellwig | 405f804 | 2010-12-10 08:42:19 +0000 | [diff] [blame] | 154 | if (nmaps && (imap->br_startblock == HOLESTARTBLOCK)) |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 155 | last_fsb = MIN(last_fsb, (xfs_fileoff_t) |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 156 | imap->br_blockcount + |
| 157 | imap->br_startoff); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 158 | } |
| 159 | count_fsb = last_fsb - offset_fsb; |
| 160 | ASSERT(count_fsb > 0); |
| 161 | |
| 162 | resaligned = count_fsb; |
| 163 | if (unlikely(extsz)) { |
| 164 | if ((temp = do_mod(offset_fsb, extsz))) |
| 165 | resaligned += temp; |
| 166 | if ((temp = do_mod(resaligned, extsz))) |
| 167 | resaligned += extsz - temp; |
| 168 | } |
| 169 | |
| 170 | if (unlikely(rt)) { |
| 171 | resrtextents = qblocks = resaligned; |
| 172 | resrtextents /= mp->m_sb.sb_rextsize; |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 173 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); |
| 174 | quota_flag = XFS_QMOPT_RES_RTBLKS; |
| 175 | } else { |
| 176 | resrtextents = 0; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 177 | resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resaligned); |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 178 | quota_flag = XFS_QMOPT_RES_REGBLKS; |
| 179 | } |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | /* |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 182 | * Allocate and setup the transaction |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 185 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write, |
| 186 | resblks, resrtextents); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | /* |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 188 | * Check for running out of space, note: need lock to return |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | */ |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 190 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | xfs_trans_cancel(tp, 0); |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 192 | return XFS_ERROR(error); |
| 193 | } |
| 194 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 197 | error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks, 0, quota_flag); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 198 | if (error) |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 199 | goto out_trans_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 201 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 203 | bmapi_flag = 0; |
Christoph Hellwig | ce7ae151 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 204 | if (offset < XFS_ISIZE(ip) || extsz) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | bmapi_flag |= XFS_BMAPI_PREALLOC; |
| 206 | |
| 207 | /* |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 208 | * From this point onwards we overwrite the imap pointer that the |
| 209 | * caller gave to us. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 211 | xfs_bmap_init(&free_list, &firstfsb); |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 212 | nimaps = 1; |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 213 | error = xfs_bmapi_write(tp, ip, offset_fsb, count_fsb, bmapi_flag, |
| 214 | &firstfsb, 0, imap, &nimaps, &free_list); |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 215 | if (error) |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 216 | goto out_bmap_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
| 218 | /* |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 219 | * Complete the transaction |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | */ |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 221 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 222 | if (error) |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 223 | goto out_bmap_cancel; |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 224 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 225 | if (error) |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 226 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 228 | /* |
| 229 | * Copy any maps to caller's array and return any error. |
| 230 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | if (nimaps == 0) { |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 232 | error = XFS_ERROR(ENOSPC); |
| 233 | goto out_unlock; |
Nathan Scott | 572d95f | 2006-09-28 11:03:20 +1000 | [diff] [blame] | 234 | } |
| 235 | |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 236 | if (!(imap->br_startblock || XFS_IS_REALTIME_INODE(ip))) |
Dave Chinner | 6d4a8ec | 2011-03-07 10:06:35 +1100 | [diff] [blame] | 237 | error = xfs_alert_fsblock_zero(ip, imap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 239 | out_unlock: |
| 240 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 241 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 243 | out_bmap_cancel: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | xfs_bmap_cancel(&free_list); |
Dave Chinner | ea562ed | 2012-05-08 20:48:53 +1000 | [diff] [blame] | 245 | xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag); |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 246 | out_trans_cancel: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 248 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | } |
| 250 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 251 | /* |
Dave Chinner | 8de2bf9 | 2009-04-06 18:49:12 +0200 | [diff] [blame] | 252 | * If the caller is doing a write at the end of the file, then extend the |
| 253 | * allocation out to the file system's write iosize. We clean up any extra |
| 254 | * space left over when the file is closed in xfs_inactive(). |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 255 | * |
| 256 | * If we find we already have delalloc preallocation beyond EOF, don't do more |
| 257 | * preallocation as it it not needed. |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 258 | */ |
| 259 | STATIC int |
| 260 | xfs_iomap_eof_want_preallocate( |
| 261 | xfs_mount_t *mp, |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 262 | xfs_inode_t *ip, |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 263 | xfs_off_t offset, |
| 264 | size_t count, |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 265 | xfs_bmbt_irec_t *imap, |
| 266 | int nimaps, |
| 267 | int *prealloc) |
| 268 | { |
| 269 | xfs_fileoff_t start_fsb; |
| 270 | xfs_filblks_t count_fsb; |
| 271 | xfs_fsblock_t firstblock; |
| 272 | int n, error, imaps; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 273 | int found_delalloc = 0; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 274 | |
| 275 | *prealloc = 0; |
Christoph Hellwig | ce7ae151 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 276 | if (offset + count <= XFS_ISIZE(ip)) |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 277 | return 0; |
| 278 | |
| 279 | /* |
Dave Chinner | 133eeb1 | 2013-06-27 16:04:48 +1000 | [diff] [blame] | 280 | * If the file is smaller than the minimum prealloc and we are using |
| 281 | * dynamic preallocation, don't do any preallocation at all as it is |
| 282 | * likely this is the only write to the file that is going to be done. |
| 283 | */ |
| 284 | if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) && |
| 285 | XFS_ISIZE(ip) < XFS_FSB_TO_B(mp, mp->m_writeio_blocks)) |
| 286 | return 0; |
| 287 | |
| 288 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 289 | * If there are any real blocks past eof, then don't |
| 290 | * do any speculative allocation. |
| 291 | */ |
| 292 | start_fsb = XFS_B_TO_FSBT(mp, ((xfs_ufsize_t)(offset + count - 1))); |
Dave Chinner | 3297238 | 2012-06-08 15:44:54 +1000 | [diff] [blame] | 293 | count_fsb = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 294 | while (count_fsb > 0) { |
| 295 | imaps = nimaps; |
Nathan Scott | 3ddb8fa | 2006-01-11 15:33:02 +1100 | [diff] [blame] | 296 | firstblock = NULLFSBLOCK; |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 297 | error = xfs_bmapi_read(ip, start_fsb, count_fsb, imap, &imaps, |
| 298 | 0); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 299 | if (error) |
| 300 | return error; |
| 301 | for (n = 0; n < imaps; n++) { |
| 302 | if ((imap[n].br_startblock != HOLESTARTBLOCK) && |
| 303 | (imap[n].br_startblock != DELAYSTARTBLOCK)) |
| 304 | return 0; |
| 305 | start_fsb += imap[n].br_blockcount; |
| 306 | count_fsb -= imap[n].br_blockcount; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 307 | |
| 308 | if (imap[n].br_startblock == DELAYSTARTBLOCK) |
| 309 | found_delalloc = 1; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 310 | } |
| 311 | } |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 312 | if (!found_delalloc) |
| 313 | *prealloc = 1; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 314 | return 0; |
| 315 | } |
| 316 | |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 317 | /* |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 318 | * Determine the initial size of the preallocation. We are beyond the current |
| 319 | * EOF here, but we need to take into account whether this is a sparse write or |
| 320 | * an extending write when determining the preallocation size. Hence we need to |
| 321 | * look up the extent that ends at the current write offset and use the result |
| 322 | * to determine the preallocation size. |
| 323 | * |
| 324 | * If the extent is a hole, then preallocation is essentially disabled. |
| 325 | * Otherwise we take the size of the preceeding data extent as the basis for the |
| 326 | * preallocation size. If the size of the extent is greater than half the |
| 327 | * maximum extent length, then use the current offset as the basis. This ensures |
| 328 | * that for large files the preallocation size always extends to MAXEXTLEN |
| 329 | * rather than falling short due to things like stripe unit/width alignment of |
| 330 | * real extents. |
| 331 | */ |
Mark Tinguely | e8108ce | 2013-02-24 13:04:37 -0600 | [diff] [blame] | 332 | STATIC xfs_fsblock_t |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 333 | xfs_iomap_eof_prealloc_initial_size( |
| 334 | struct xfs_mount *mp, |
| 335 | struct xfs_inode *ip, |
| 336 | xfs_off_t offset, |
| 337 | xfs_bmbt_irec_t *imap, |
| 338 | int nimaps) |
| 339 | { |
| 340 | xfs_fileoff_t start_fsb; |
| 341 | int imaps = 1; |
| 342 | int error; |
| 343 | |
| 344 | ASSERT(nimaps >= imaps); |
| 345 | |
| 346 | /* if we are using a specific prealloc size, return now */ |
| 347 | if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) |
| 348 | return 0; |
| 349 | |
Dave Chinner | 133eeb1 | 2013-06-27 16:04:48 +1000 | [diff] [blame] | 350 | /* If the file is small, then use the minimum prealloc */ |
| 351 | if (XFS_ISIZE(ip) < XFS_FSB_TO_B(mp, mp->m_dalign)) |
| 352 | return 0; |
| 353 | |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 354 | /* |
| 355 | * As we write multiple pages, the offset will always align to the |
| 356 | * start of a page and hence point to a hole at EOF. i.e. if the size is |
| 357 | * 4096 bytes, we only have one block at FSB 0, but XFS_B_TO_FSB(4096) |
| 358 | * will return FSB 1. Hence if there are blocks in the file, we want to |
| 359 | * point to the block prior to the EOF block and not the hole that maps |
| 360 | * directly at @offset. |
| 361 | */ |
| 362 | start_fsb = XFS_B_TO_FSB(mp, offset); |
| 363 | if (start_fsb) |
| 364 | start_fsb--; |
| 365 | error = xfs_bmapi_read(ip, start_fsb, 1, imap, &imaps, XFS_BMAPI_ENTIRE); |
| 366 | if (error) |
| 367 | return 0; |
| 368 | |
| 369 | ASSERT(imaps == 1); |
| 370 | if (imap[0].br_startblock == HOLESTARTBLOCK) |
| 371 | return 0; |
| 372 | if (imap[0].br_blockcount <= (MAXEXTLEN >> 1)) |
Brian Foster | e114b5f | 2013-02-19 10:24:41 -0500 | [diff] [blame] | 373 | return imap[0].br_blockcount << 1; |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 374 | return XFS_B_TO_FSB(mp, offset); |
| 375 | } |
| 376 | |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 377 | STATIC bool |
| 378 | xfs_quota_need_throttle( |
| 379 | struct xfs_inode *ip, |
| 380 | int type, |
| 381 | xfs_fsblock_t alloc_blocks) |
| 382 | { |
| 383 | struct xfs_dquot *dq = xfs_inode_dquot(ip, type); |
| 384 | |
| 385 | if (!dq || !xfs_this_quota_on(ip->i_mount, type)) |
| 386 | return false; |
| 387 | |
| 388 | /* no hi watermark, no throttle */ |
| 389 | if (!dq->q_prealloc_hi_wmark) |
| 390 | return false; |
| 391 | |
| 392 | /* under the lo watermark, no throttle */ |
| 393 | if (dq->q_res_bcount + alloc_blocks < dq->q_prealloc_lo_wmark) |
| 394 | return false; |
| 395 | |
| 396 | return true; |
| 397 | } |
| 398 | |
| 399 | STATIC void |
| 400 | xfs_quota_calc_throttle( |
| 401 | struct xfs_inode *ip, |
| 402 | int type, |
| 403 | xfs_fsblock_t *qblocks, |
| 404 | int *qshift) |
| 405 | { |
| 406 | int64_t freesp; |
| 407 | int shift = 0; |
| 408 | struct xfs_dquot *dq = xfs_inode_dquot(ip, type); |
| 409 | |
| 410 | /* over hi wmark, squash the prealloc completely */ |
| 411 | if (dq->q_res_bcount >= dq->q_prealloc_hi_wmark) { |
| 412 | *qblocks = 0; |
| 413 | return; |
| 414 | } |
| 415 | |
| 416 | freesp = dq->q_prealloc_hi_wmark - dq->q_res_bcount; |
| 417 | if (freesp < dq->q_low_space[XFS_QLOWSP_5_PCNT]) { |
| 418 | shift = 2; |
| 419 | if (freesp < dq->q_low_space[XFS_QLOWSP_3_PCNT]) |
| 420 | shift += 2; |
| 421 | if (freesp < dq->q_low_space[XFS_QLOWSP_1_PCNT]) |
| 422 | shift += 2; |
| 423 | } |
| 424 | |
| 425 | /* only overwrite the throttle values if we are more aggressive */ |
| 426 | if ((freesp >> shift) < (*qblocks >> *qshift)) { |
| 427 | *qblocks = freesp; |
| 428 | *qshift = shift; |
| 429 | } |
| 430 | } |
| 431 | |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 432 | /* |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 433 | * If we don't have a user specified preallocation size, dynamically increase |
| 434 | * the preallocation size as the size of the file grows. Cap the maximum size |
| 435 | * at a single extent or less if the filesystem is near full. The closer the |
| 436 | * filesystem is to full, the smaller the maximum prealocation. |
| 437 | */ |
| 438 | STATIC xfs_fsblock_t |
| 439 | xfs_iomap_prealloc_size( |
| 440 | struct xfs_mount *mp, |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 441 | struct xfs_inode *ip, |
| 442 | xfs_off_t offset, |
| 443 | struct xfs_bmbt_irec *imap, |
| 444 | int nimaps) |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 445 | { |
| 446 | xfs_fsblock_t alloc_blocks = 0; |
Brian Foster | 3c58b5f | 2013-03-18 10:51:43 -0400 | [diff] [blame] | 447 | int shift = 0; |
| 448 | int64_t freesp; |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 449 | xfs_fsblock_t qblocks; |
| 450 | int qshift = 0; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 451 | |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 452 | alloc_blocks = xfs_iomap_eof_prealloc_initial_size(mp, ip, offset, |
| 453 | imap, nimaps); |
Brian Foster | 3c58b5f | 2013-03-18 10:51:43 -0400 | [diff] [blame] | 454 | if (!alloc_blocks) |
| 455 | goto check_writeio; |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 456 | qblocks = alloc_blocks; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 457 | |
Brian Foster | c9bdbdc | 2013-03-18 10:51:44 -0400 | [diff] [blame] | 458 | /* |
| 459 | * MAXEXTLEN is not a power of two value but we round the prealloc down |
| 460 | * to the nearest power of two value after throttling. To prevent the |
| 461 | * round down from unconditionally reducing the maximum supported prealloc |
| 462 | * size, we round up first, apply appropriate throttling, round down and |
| 463 | * cap the value to MAXEXTLEN. |
| 464 | */ |
| 465 | alloc_blocks = XFS_FILEOFF_MIN(roundup_pow_of_two(MAXEXTLEN), |
| 466 | alloc_blocks); |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 467 | |
Brian Foster | 3c58b5f | 2013-03-18 10:51:43 -0400 | [diff] [blame] | 468 | xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); |
| 469 | freesp = mp->m_sb.sb_fdblocks; |
| 470 | if (freesp < mp->m_low_space[XFS_LOWSP_5_PCNT]) { |
| 471 | shift = 2; |
| 472 | if (freesp < mp->m_low_space[XFS_LOWSP_4_PCNT]) |
| 473 | shift++; |
| 474 | if (freesp < mp->m_low_space[XFS_LOWSP_3_PCNT]) |
| 475 | shift++; |
| 476 | if (freesp < mp->m_low_space[XFS_LOWSP_2_PCNT]) |
| 477 | shift++; |
| 478 | if (freesp < mp->m_low_space[XFS_LOWSP_1_PCNT]) |
| 479 | shift++; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 480 | } |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 481 | |
| 482 | /* |
| 483 | * Check each quota to cap the prealloc size and provide a shift |
| 484 | * value to throttle with. |
| 485 | */ |
| 486 | if (xfs_quota_need_throttle(ip, XFS_DQ_USER, alloc_blocks)) |
| 487 | xfs_quota_calc_throttle(ip, XFS_DQ_USER, &qblocks, &qshift); |
| 488 | if (xfs_quota_need_throttle(ip, XFS_DQ_GROUP, alloc_blocks)) |
| 489 | xfs_quota_calc_throttle(ip, XFS_DQ_GROUP, &qblocks, &qshift); |
| 490 | if (xfs_quota_need_throttle(ip, XFS_DQ_PROJ, alloc_blocks)) |
| 491 | xfs_quota_calc_throttle(ip, XFS_DQ_PROJ, &qblocks, &qshift); |
| 492 | |
| 493 | /* |
| 494 | * The final prealloc size is set to the minimum of free space available |
| 495 | * in each of the quotas and the overall filesystem. |
| 496 | * |
| 497 | * The shift throttle value is set to the maximum value as determined by |
| 498 | * the global low free space values and per-quota low free space values. |
| 499 | */ |
| 500 | alloc_blocks = MIN(alloc_blocks, qblocks); |
| 501 | shift = MAX(shift, qshift); |
| 502 | |
Brian Foster | 3c58b5f | 2013-03-18 10:51:43 -0400 | [diff] [blame] | 503 | if (shift) |
| 504 | alloc_blocks >>= shift; |
Brian Foster | c9bdbdc | 2013-03-18 10:51:44 -0400 | [diff] [blame] | 505 | /* |
| 506 | * rounddown_pow_of_two() returns an undefined result if we pass in |
| 507 | * alloc_blocks = 0. |
| 508 | */ |
| 509 | if (alloc_blocks) |
| 510 | alloc_blocks = rounddown_pow_of_two(alloc_blocks); |
| 511 | if (alloc_blocks > MAXEXTLEN) |
| 512 | alloc_blocks = MAXEXTLEN; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 513 | |
Brian Foster | 3c58b5f | 2013-03-18 10:51:43 -0400 | [diff] [blame] | 514 | /* |
| 515 | * If we are still trying to allocate more space than is |
| 516 | * available, squash the prealloc hard. This can happen if we |
| 517 | * have a large file on a small filesystem and the above |
| 518 | * lowspace thresholds are smaller than MAXEXTLEN. |
| 519 | */ |
| 520 | while (alloc_blocks && alloc_blocks >= freesp) |
| 521 | alloc_blocks >>= 4; |
| 522 | |
| 523 | check_writeio: |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 524 | if (alloc_blocks < mp->m_writeio_blocks) |
| 525 | alloc_blocks = mp->m_writeio_blocks; |
| 526 | |
Brian Foster | 19cb7e3 | 2013-03-18 10:51:48 -0400 | [diff] [blame] | 527 | trace_xfs_iomap_prealloc_size(ip, alloc_blocks, shift, |
| 528 | mp->m_writeio_blocks); |
| 529 | |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 530 | return alloc_blocks; |
| 531 | } |
| 532 | |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 533 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | xfs_iomap_write_delay( |
| 535 | xfs_inode_t *ip, |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 536 | xfs_off_t offset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | size_t count, |
Christoph Hellwig | 405f804 | 2010-12-10 08:42:19 +0000 | [diff] [blame] | 538 | xfs_bmbt_irec_t *ret_imap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | { |
| 540 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | xfs_fileoff_t offset_fsb; |
| 542 | xfs_fileoff_t last_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 543 | xfs_off_t aligned_offset; |
| 544 | xfs_fileoff_t ioalign; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 545 | xfs_extlen_t extsz; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | int nimaps; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | xfs_bmbt_irec_t imap[XFS_WRITE_IMAPS]; |
Dave Chinner | 9aa0500 | 2012-10-08 21:56:04 +1100 | [diff] [blame] | 548 | int prealloc; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 549 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 551 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | |
| 553 | /* |
| 554 | * Make sure that the dquots are there. This doesn't hold |
| 555 | * the ilock across a disk read. |
| 556 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 557 | error = xfs_qm_dqattach_locked(ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | if (error) |
| 559 | return XFS_ERROR(error); |
| 560 | |
David Chinner | 957d0eb | 2007-06-18 16:50:37 +1000 | [diff] [blame] | 561 | extsz = xfs_get_extsz_hint(ip); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 562 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 563 | |
Lachlan McIlroy | 9f6c92b | 2008-12-22 17:56:49 +1100 | [diff] [blame] | 564 | error = xfs_iomap_eof_want_preallocate(mp, ip, offset, count, |
Christoph Hellwig | 405f804 | 2010-12-10 08:42:19 +0000 | [diff] [blame] | 565 | imap, XFS_WRITE_IMAPS, &prealloc); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 566 | if (error) |
| 567 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
Dave Chinner | 8de2bf9 | 2009-04-06 18:49:12 +0200 | [diff] [blame] | 569 | retry: |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 570 | if (prealloc) { |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 571 | xfs_fsblock_t alloc_blocks; |
| 572 | |
| 573 | alloc_blocks = xfs_iomap_prealloc_size(mp, ip, offset, imap, |
| 574 | XFS_WRITE_IMAPS); |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 575 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | aligned_offset = XFS_WRITEIO_ALIGN(mp, (offset + count - 1)); |
| 577 | ioalign = XFS_B_TO_FSBT(mp, aligned_offset); |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 578 | last_fsb = ioalign + alloc_blocks; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 579 | } else { |
| 580 | last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | } |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 582 | |
| 583 | if (prealloc || extsz) { |
Lachlan McIlroy | 9f6c92b | 2008-12-22 17:56:49 +1100 | [diff] [blame] | 584 | error = xfs_iomap_eof_align_last_fsb(mp, ip, extsz, &last_fsb); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 585 | if (error) |
| 586 | return error; |
| 587 | } |
| 588 | |
Dave Chinner | 3ed9116 | 2012-04-29 22:43:19 +1000 | [diff] [blame] | 589 | /* |
| 590 | * Make sure preallocation does not create extents beyond the range we |
| 591 | * actually support in this filesystem. |
| 592 | */ |
Dave Chinner | d2c2819 | 2012-06-08 15:44:53 +1000 | [diff] [blame] | 593 | if (last_fsb > XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes)) |
| 594 | last_fsb = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes); |
Dave Chinner | 3ed9116 | 2012-04-29 22:43:19 +1000 | [diff] [blame] | 595 | |
| 596 | ASSERT(last_fsb > offset_fsb); |
| 597 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | nimaps = XFS_WRITE_IMAPS; |
Christoph Hellwig | 4403280 | 2011-09-18 20:40:48 +0000 | [diff] [blame] | 599 | error = xfs_bmapi_delay(ip, offset_fsb, last_fsb - offset_fsb, |
| 600 | imap, &nimaps, XFS_BMAPI_ENTIRE); |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 601 | switch (error) { |
| 602 | case 0: |
| 603 | case ENOSPC: |
| 604 | case EDQUOT: |
| 605 | break; |
| 606 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | return XFS_ERROR(error); |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 608 | } |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 609 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | /* |
Dave Chinner | 9aa0500 | 2012-10-08 21:56:04 +1100 | [diff] [blame] | 611 | * If bmapi returned us nothing, we got either ENOSPC or EDQUOT. Retry |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 612 | * without EOF preallocation. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | */ |
| 614 | if (nimaps == 0) { |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 615 | trace_xfs_delalloc_enospc(ip, offset, count); |
Dave Chinner | 9aa0500 | 2012-10-08 21:56:04 +1100 | [diff] [blame] | 616 | if (prealloc) { |
| 617 | prealloc = 0; |
| 618 | error = 0; |
| 619 | goto retry; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 620 | } |
Dave Chinner | 9aa0500 | 2012-10-08 21:56:04 +1100 | [diff] [blame] | 621 | return XFS_ERROR(error ? error : ENOSPC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | } |
| 623 | |
David Chinner | 86c4d62 | 2008-04-29 12:53:21 +1000 | [diff] [blame] | 624 | if (!(imap[0].br_startblock || XFS_IS_REALTIME_INODE(ip))) |
Dave Chinner | 6d4a8ec | 2011-03-07 10:06:35 +1100 | [diff] [blame] | 625 | return xfs_alert_fsblock_zero(ip, &imap[0]); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 626 | |
Brian Foster | 27b5286 | 2012-11-06 09:50:38 -0500 | [diff] [blame] | 627 | /* |
| 628 | * Tag the inode as speculatively preallocated so we can reclaim this |
| 629 | * space on demand, if necessary. |
| 630 | */ |
| 631 | if (prealloc) |
| 632 | xfs_inode_set_eofblocks_tag(ip); |
| 633 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 634 | *ret_imap = imap[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | return 0; |
| 636 | } |
| 637 | |
| 638 | /* |
| 639 | * Pass in a delayed allocate extent, convert it to real extents; |
| 640 | * return to the caller the extent we create which maps on top of |
| 641 | * the originating callers request. |
| 642 | * |
| 643 | * Called without a lock on the inode. |
David Chinner | e4143a1 | 2007-11-23 16:29:11 +1100 | [diff] [blame] | 644 | * |
| 645 | * We no longer bother to look at the incoming map - all we have to |
| 646 | * guarantee is that whatever we allocate fills the required range. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | */ |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 648 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | xfs_iomap_write_allocate( |
| 650 | xfs_inode_t *ip, |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 651 | xfs_off_t offset, |
Christoph Hellwig | 405f804 | 2010-12-10 08:42:19 +0000 | [diff] [blame] | 652 | xfs_bmbt_irec_t *imap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | { |
| 654 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | xfs_fileoff_t offset_fsb, last_block; |
| 656 | xfs_fileoff_t end_fsb, map_start_fsb; |
| 657 | xfs_fsblock_t first_block; |
| 658 | xfs_bmap_free_t free_list; |
| 659 | xfs_filblks_t count_fsb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | xfs_trans_t *tp; |
David Chinner | e4143a1 | 2007-11-23 16:29:11 +1100 | [diff] [blame] | 661 | int nimaps, committed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | int error = 0; |
| 663 | int nres; |
| 664 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | /* |
| 666 | * Make sure that the dquots are there. |
| 667 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 668 | error = xfs_qm_dqattach(ip, 0); |
| 669 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | return XFS_ERROR(error); |
| 671 | |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 672 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 673 | count_fsb = imap->br_blockcount; |
| 674 | map_start_fsb = imap->br_startoff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | |
| 676 | XFS_STATS_ADD(xs_xstrat_bytes, XFS_FSB_TO_B(mp, count_fsb)); |
| 677 | |
| 678 | while (count_fsb != 0) { |
| 679 | /* |
| 680 | * Set up a transaction with which to allocate the |
| 681 | * backing store for the file. Do allocations in a |
| 682 | * loop until we get some space in the range we are |
| 683 | * interested in. The other space that might be allocated |
| 684 | * is in the delayed allocation extent on which we sit |
| 685 | * but before our buffer starts. |
| 686 | */ |
| 687 | |
| 688 | nimaps = 0; |
| 689 | while (nimaps == 0) { |
| 690 | tp = xfs_trans_alloc(mp, XFS_TRANS_STRAT_WRITE); |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 691 | tp->t_flags |= XFS_TRANS_RESERVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | nres = XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK); |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 693 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write, |
| 694 | nres, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | if (error) { |
| 696 | xfs_trans_cancel(tp, 0); |
| 697 | return XFS_ERROR(error); |
| 698 | } |
| 699 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 700 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 702 | xfs_bmap_init(&free_list, &first_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | /* |
David Chinner | e4143a1 | 2007-11-23 16:29:11 +1100 | [diff] [blame] | 705 | * it is possible that the extents have changed since |
| 706 | * we did the read call as we dropped the ilock for a |
| 707 | * while. We have to be careful about truncates or hole |
| 708 | * punchs here - we are not allowed to allocate |
| 709 | * non-delalloc blocks here. |
| 710 | * |
| 711 | * The only protection against truncation is the pages |
| 712 | * for the range we are being asked to convert are |
| 713 | * locked and hence a truncate will block on them |
| 714 | * first. |
| 715 | * |
| 716 | * As a result, if we go beyond the range we really |
| 717 | * need and hit an delalloc extent boundary followed by |
| 718 | * a hole while we have excess blocks in the map, we |
| 719 | * will fill the hole incorrectly and overrun the |
| 720 | * transaction reservation. |
| 721 | * |
| 722 | * Using a single map prevents this as we are forced to |
| 723 | * check each map we look for overlap with the desired |
| 724 | * range and abort as soon as we find it. Also, given |
| 725 | * that we only return a single map, having one beyond |
| 726 | * what we can return is probably a bit silly. |
| 727 | * |
| 728 | * We also need to check that we don't go beyond EOF; |
| 729 | * this is a truncate optimisation as a truncate sets |
| 730 | * the new file size before block on the pages we |
| 731 | * currently have locked under writeback. Because they |
| 732 | * are about to be tossed, we don't need to write them |
| 733 | * back.... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | */ |
David Chinner | e4143a1 | 2007-11-23 16:29:11 +1100 | [diff] [blame] | 735 | nimaps = 1; |
Christoph Hellwig | ce7ae151 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 736 | end_fsb = XFS_B_TO_FSB(mp, XFS_ISIZE(ip)); |
David Chinner | 7c9ef85 | 2008-04-10 12:21:59 +1000 | [diff] [blame] | 737 | error = xfs_bmap_last_offset(NULL, ip, &last_block, |
| 738 | XFS_DATA_FORK); |
| 739 | if (error) |
| 740 | goto trans_cancel; |
| 741 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | last_block = XFS_FILEOFF_MAX(last_block, end_fsb); |
| 743 | if ((map_start_fsb + count_fsb) > last_block) { |
| 744 | count_fsb = last_block - map_start_fsb; |
| 745 | if (count_fsb == 0) { |
| 746 | error = EAGAIN; |
| 747 | goto trans_cancel; |
| 748 | } |
| 749 | } |
| 750 | |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 751 | /* |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 752 | * From this point onwards we overwrite the imap |
| 753 | * pointer that the caller gave to us. |
| 754 | */ |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 755 | error = xfs_bmapi_write(tp, ip, map_start_fsb, |
Dave Chinner | 2455881 | 2012-10-05 11:06:58 +1000 | [diff] [blame] | 756 | count_fsb, |
| 757 | XFS_BMAPI_STACK_SWITCH, |
| 758 | &first_block, 1, |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 759 | imap, &nimaps, &free_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | if (error) |
| 761 | goto trans_cancel; |
| 762 | |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 763 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | if (error) |
| 765 | goto trans_cancel; |
| 766 | |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 767 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | if (error) |
| 769 | goto error0; |
| 770 | |
| 771 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 772 | } |
| 773 | |
| 774 | /* |
| 775 | * See if we were able to allocate an extent that |
| 776 | * covers at least part of the callers request |
| 777 | */ |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 778 | if (!(imap->br_startblock || XFS_IS_REALTIME_INODE(ip))) |
Dave Chinner | 6d4a8ec | 2011-03-07 10:06:35 +1100 | [diff] [blame] | 779 | return xfs_alert_fsblock_zero(ip, imap); |
David Chinner | 86c4d62 | 2008-04-29 12:53:21 +1000 | [diff] [blame] | 780 | |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 781 | if ((offset_fsb >= imap->br_startoff) && |
| 782 | (offset_fsb < (imap->br_startoff + |
| 783 | imap->br_blockcount))) { |
David Chinner | e4143a1 | 2007-11-23 16:29:11 +1100 | [diff] [blame] | 784 | XFS_STATS_INC(xs_xstrat_quick); |
| 785 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | } |
| 787 | |
David Chinner | e4143a1 | 2007-11-23 16:29:11 +1100 | [diff] [blame] | 788 | /* |
| 789 | * So far we have not mapped the requested part of the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | * file, just surrounding data, try again. |
| 791 | */ |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 792 | count_fsb -= imap->br_blockcount; |
| 793 | map_start_fsb = imap->br_startoff + imap->br_blockcount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | } |
| 795 | |
| 796 | trans_cancel: |
| 797 | xfs_bmap_cancel(&free_list); |
| 798 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| 799 | error0: |
| 800 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 801 | return XFS_ERROR(error); |
| 802 | } |
| 803 | |
| 804 | int |
| 805 | xfs_iomap_write_unwritten( |
| 806 | xfs_inode_t *ip, |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 807 | xfs_off_t offset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | size_t count) |
| 809 | { |
| 810 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | xfs_fileoff_t offset_fsb; |
| 812 | xfs_filblks_t count_fsb; |
| 813 | xfs_filblks_t numblks_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 814 | xfs_fsblock_t firstfsb; |
| 815 | int nimaps; |
| 816 | xfs_trans_t *tp; |
| 817 | xfs_bmbt_irec_t imap; |
| 818 | xfs_bmap_free_t free_list; |
Christoph Hellwig | 84803fb | 2012-02-29 09:53:50 +0000 | [diff] [blame] | 819 | xfs_fsize_t i_size; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 820 | uint resblks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | int committed; |
| 822 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 824 | trace_xfs_unwritten_convert(ip, offset, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | |
| 826 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 827 | count_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count); |
| 828 | count_fsb = (xfs_filblks_t)(count_fsb - offset_fsb); |
| 829 | |
Lachlan McIlroy | 4ddd8bb | 2008-06-27 13:32:53 +1000 | [diff] [blame] | 830 | /* |
| 831 | * Reserve enough blocks in this transaction for two complete extent |
| 832 | * btree splits. We may be converting the middle part of an unwritten |
| 833 | * extent and in this case we will insert two new extents in the btree |
| 834 | * each of which could cause a full split. |
| 835 | * |
| 836 | * This reservation amount will be used in the first call to |
| 837 | * xfs_bmbt_split() to select an AG with enough space to satisfy the |
| 838 | * rest of the operation. |
| 839 | */ |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 840 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0) << 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 842 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | /* |
| 844 | * set up a transaction to convert the range of extents |
| 845 | * from unwritten to real. Do allocations in a loop until |
| 846 | * we have covered the range passed in. |
Christoph Hellwig | 80641dc | 2009-10-19 04:00:03 +0000 | [diff] [blame] | 847 | * |
| 848 | * Note that we open code the transaction allocation here |
| 849 | * to pass KM_NOFS--we can't risk to recursing back into |
| 850 | * the filesystem here as we might be asked to write out |
| 851 | * the same inode that we complete here and might deadlock |
| 852 | * on the iolock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | */ |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 854 | sb_start_intwrite(mp->m_super); |
Christoph Hellwig | 80641dc | 2009-10-19 04:00:03 +0000 | [diff] [blame] | 855 | tp = _xfs_trans_alloc(mp, XFS_TRANS_STRAT_WRITE, KM_NOFS); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 856 | tp->t_flags |= XFS_TRANS_RESERVE | XFS_TRANS_FREEZE_PROT; |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 857 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write, |
| 858 | resblks, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | if (error) { |
| 860 | xfs_trans_cancel(tp, 0); |
Nathan Scott | 572d95f | 2006-09-28 11:03:20 +1000 | [diff] [blame] | 861 | return XFS_ERROR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | } |
| 863 | |
| 864 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 865 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | |
| 867 | /* |
| 868 | * Modify the unwritten extent state of the buffer. |
| 869 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 870 | xfs_bmap_init(&free_list, &firstfsb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | nimaps = 1; |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 872 | error = xfs_bmapi_write(tp, ip, offset_fsb, count_fsb, |
| 873 | XFS_BMAPI_CONVERT, &firstfsb, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 874 | 1, &imap, &nimaps, &free_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | if (error) |
| 876 | goto error_on_bmapi_transaction; |
| 877 | |
Christoph Hellwig | 84803fb | 2012-02-29 09:53:50 +0000 | [diff] [blame] | 878 | /* |
| 879 | * Log the updated inode size as we go. We have to be careful |
| 880 | * to only log it up to the actual write offset if it is |
| 881 | * halfway into a block. |
| 882 | */ |
| 883 | i_size = XFS_FSB_TO_B(mp, offset_fsb + count_fsb); |
| 884 | if (i_size > offset + count) |
| 885 | i_size = offset + count; |
| 886 | |
| 887 | i_size = xfs_new_eof(ip, i_size); |
| 888 | if (i_size) { |
| 889 | ip->i_d.di_size = i_size; |
| 890 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 891 | } |
| 892 | |
| 893 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | if (error) |
| 895 | goto error_on_bmapi_transaction; |
| 896 | |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 897 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 899 | if (error) |
Nathan Scott | 572d95f | 2006-09-28 11:03:20 +1000 | [diff] [blame] | 900 | return XFS_ERROR(error); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 901 | |
David Chinner | 86c4d62 | 2008-04-29 12:53:21 +1000 | [diff] [blame] | 902 | if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip))) |
Dave Chinner | 6d4a8ec | 2011-03-07 10:06:35 +1100 | [diff] [blame] | 903 | return xfs_alert_fsblock_zero(ip, &imap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | |
| 905 | if ((numblks_fsb = imap.br_blockcount) == 0) { |
| 906 | /* |
| 907 | * The numblks_fsb value should always get |
| 908 | * smaller, otherwise the loop is stuck. |
| 909 | */ |
| 910 | ASSERT(imap.br_blockcount); |
| 911 | break; |
| 912 | } |
| 913 | offset_fsb += numblks_fsb; |
| 914 | count_fsb -= numblks_fsb; |
| 915 | } while (count_fsb > 0); |
| 916 | |
| 917 | return 0; |
| 918 | |
| 919 | error_on_bmapi_transaction: |
| 920 | xfs_bmap_cancel(&free_list); |
| 921 | xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT)); |
| 922 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | return XFS_ERROR(error); |
| 924 | } |