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_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include "xfs_inode.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 26 | #include "xfs_btree.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 27 | #include "xfs_bmap_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include "xfs_bmap.h" |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 29 | #include "xfs_bmap_util.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include "xfs_error.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 31 | #include "xfs_trans.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include "xfs_trans_space.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "xfs_iomap.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 34 | #include "xfs_trace.h" |
Brian Foster | 27b5286 | 2012-11-06 09:50:38 -0500 | [diff] [blame] | 35 | #include "xfs_icache.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 36 | #include "xfs_quota.h" |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 37 | #include "xfs_dquot_item.h" |
| 38 | #include "xfs_dquot.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | #define XFS_WRITEIO_ALIGN(mp,off) (((off) >> mp->m_writeio_log) \ |
| 42 | << mp->m_writeio_log) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #define XFS_WRITE_IMAPS XFS_BMAP_MAX_NMAP |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | STATIC int |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 46 | xfs_iomap_eof_align_last_fsb( |
| 47 | xfs_mount_t *mp, |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 48 | xfs_inode_t *ip, |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 49 | xfs_extlen_t extsize, |
| 50 | xfs_fileoff_t *last_fsb) |
| 51 | { |
Christoph Hellwig | bf322d9 | 2011-12-18 20:00:05 +0000 | [diff] [blame] | 52 | xfs_extlen_t align = 0; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 53 | int eof, error; |
| 54 | |
Christoph Hellwig | bf322d9 | 2011-12-18 20:00:05 +0000 | [diff] [blame] | 55 | if (!XFS_IS_REALTIME_INODE(ip)) { |
| 56 | /* |
| 57 | * Round up the allocation request to a stripe unit |
| 58 | * (m_dalign) boundary if the file size is >= stripe unit |
| 59 | * size, and we are allocating past the allocation eof. |
| 60 | * |
| 61 | * If mounted with the "-o swalloc" option the alignment is |
| 62 | * increased from the strip unit size to the stripe width. |
| 63 | */ |
| 64 | if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC)) |
| 65 | align = mp->m_swidth; |
| 66 | else if (mp->m_dalign) |
| 67 | align = mp->m_dalign; |
| 68 | |
Peter Watkins | 76b5730 | 2014-12-04 09:30:51 +1100 | [diff] [blame] | 69 | if (align && XFS_ISIZE(ip) < XFS_FSB_TO_B(mp, align)) |
| 70 | align = 0; |
Christoph Hellwig | bf322d9 | 2011-12-18 20:00:05 +0000 | [diff] [blame] | 71 | } |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 72 | |
| 73 | /* |
| 74 | * Always round up the allocation request to an extent boundary |
| 75 | * (when file on a real-time subvolume or has di_extsize hint). |
| 76 | */ |
| 77 | if (extsize) { |
Peter Watkins | 76b5730 | 2014-12-04 09:30:51 +1100 | [diff] [blame] | 78 | if (align) |
| 79 | align = roundup_64(align, extsize); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 80 | else |
| 81 | align = extsize; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 82 | } |
| 83 | |
Peter Watkins | 76b5730 | 2014-12-04 09:30:51 +1100 | [diff] [blame] | 84 | if (align) { |
| 85 | xfs_fileoff_t new_last_fsb = roundup_64(*last_fsb, align); |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 86 | error = xfs_bmap_eof(ip, new_last_fsb, XFS_DATA_FORK, &eof); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 87 | if (error) |
| 88 | return error; |
| 89 | if (eof) |
| 90 | *last_fsb = new_last_fsb; |
| 91 | } |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | STATIC int |
Dave Chinner | 6d4a8ec | 2011-03-07 10:06:35 +1100 | [diff] [blame] | 96 | xfs_alert_fsblock_zero( |
Nathan Scott | 572d95f | 2006-09-28 11:03:20 +1000 | [diff] [blame] | 97 | xfs_inode_t *ip, |
| 98 | xfs_bmbt_irec_t *imap) |
| 99 | { |
Dave Chinner | 6a19d93 | 2011-03-07 10:02:35 +1100 | [diff] [blame] | 100 | xfs_alert_tag(ip->i_mount, XFS_PTAG_FSBLOCK_ZERO, |
Nathan Scott | 572d95f | 2006-09-28 11:03:20 +1000 | [diff] [blame] | 101 | "Access to block zero in inode %llu " |
| 102 | "start_block: %llx start_off: %llx " |
Eric Sandeen | 08e96e1 | 2013-10-11 20:59:05 -0500 | [diff] [blame] | 103 | "blkcnt: %llx extent-state: %x", |
Nathan Scott | 572d95f | 2006-09-28 11:03:20 +1000 | [diff] [blame] | 104 | (unsigned long long)ip->i_ino, |
| 105 | (unsigned long long)imap->br_startblock, |
| 106 | (unsigned long long)imap->br_startoff, |
| 107 | (unsigned long long)imap->br_blockcount, |
| 108 | imap->br_state); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 109 | return -EFSCORRUPTED; |
Nathan Scott | 572d95f | 2006-09-28 11:03:20 +1000 | [diff] [blame] | 110 | } |
| 111 | |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 112 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | xfs_iomap_write_direct( |
| 114 | xfs_inode_t *ip, |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 115 | xfs_off_t offset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | size_t count, |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 117 | xfs_bmbt_irec_t *imap, |
Christoph Hellwig | 405f804 | 2010-12-10 08:42:19 +0000 | [diff] [blame] | 118 | int nmaps) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | { |
| 120 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | xfs_fileoff_t offset_fsb; |
| 122 | xfs_fileoff_t last_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 123 | xfs_filblks_t count_fsb, resaligned; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | xfs_fsblock_t firstfsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 125 | xfs_extlen_t extsz, temp; |
Eric Sandeen | 0116d93 | 2005-11-02 15:00:01 +1100 | [diff] [blame] | 126 | int nimaps; |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 127 | int quota_flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | int rt; |
| 129 | xfs_trans_t *tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | xfs_bmap_free_t free_list; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 131 | uint qblocks, resblks, resrtextents; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | int committed; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 133 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 135 | error = xfs_qm_dqattach(ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | if (error) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 137 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 139 | rt = XFS_IS_REALTIME_INODE(ip); |
David Chinner | 957d0eb | 2007-06-18 16:50:37 +1000 | [diff] [blame] | 140 | extsz = xfs_get_extsz_hint(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
David Chinner | 957d0eb | 2007-06-18 16:50:37 +1000 | [diff] [blame] | 142 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 143 | last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); |
Christoph Hellwig | ce7ae151 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 144 | if ((offset + count) > XFS_ISIZE(ip)) { |
Lachlan McIlroy | 9f6c92b | 2008-12-22 17:56:49 +1100 | [diff] [blame] | 145 | error = xfs_iomap_eof_align_last_fsb(mp, ip, extsz, &last_fsb); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 146 | if (error) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 147 | return error; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 148 | } else { |
Christoph Hellwig | 405f804 | 2010-12-10 08:42:19 +0000 | [diff] [blame] | 149 | if (nmaps && (imap->br_startblock == HOLESTARTBLOCK)) |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 150 | last_fsb = MIN(last_fsb, (xfs_fileoff_t) |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 151 | imap->br_blockcount + |
| 152 | imap->br_startoff); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 153 | } |
| 154 | count_fsb = last_fsb - offset_fsb; |
| 155 | ASSERT(count_fsb > 0); |
| 156 | |
| 157 | resaligned = count_fsb; |
| 158 | if (unlikely(extsz)) { |
| 159 | if ((temp = do_mod(offset_fsb, extsz))) |
| 160 | resaligned += temp; |
| 161 | if ((temp = do_mod(resaligned, extsz))) |
| 162 | resaligned += extsz - temp; |
| 163 | } |
| 164 | |
| 165 | if (unlikely(rt)) { |
| 166 | resrtextents = qblocks = resaligned; |
| 167 | resrtextents /= mp->m_sb.sb_rextsize; |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 168 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); |
| 169 | quota_flag = XFS_QMOPT_RES_RTBLKS; |
| 170 | } else { |
| 171 | resrtextents = 0; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 172 | resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resaligned); |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 173 | quota_flag = XFS_QMOPT_RES_REGBLKS; |
| 174 | } |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | /* |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 177 | * Allocate and setup the transaction |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 180 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write, |
| 181 | resblks, resrtextents); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | /* |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 183 | * Check for running out of space, note: need lock to return |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | */ |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 185 | if (error) { |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 186 | xfs_trans_cancel(tp); |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 187 | return error; |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 188 | } |
| 189 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 192 | error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks, 0, quota_flag); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 193 | if (error) |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 194 | goto out_trans_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 196 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | /* |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 199 | * From this point onwards we overwrite the imap pointer that the |
| 200 | * caller gave to us. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 202 | xfs_bmap_init(&free_list, &firstfsb); |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 203 | nimaps = 1; |
Christoph Hellwig | d531d91 | 2014-02-10 10:27:43 +1100 | [diff] [blame] | 204 | error = xfs_bmapi_write(tp, ip, offset_fsb, count_fsb, |
| 205 | XFS_BMAPI_PREALLOC, &firstfsb, 0, |
| 206 | imap, &nimaps, &free_list); |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 207 | if (error) |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 208 | goto out_bmap_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
| 210 | /* |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 211 | * Complete the transaction |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | */ |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 213 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 214 | if (error) |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 215 | goto out_bmap_cancel; |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 216 | error = xfs_trans_commit(tp); |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 217 | if (error) |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 218 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
Nathan Scott | 06d10dd | 2005-06-21 15:48:47 +1000 | [diff] [blame] | 220 | /* |
| 221 | * Copy any maps to caller's array and return any error. |
| 222 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | if (nimaps == 0) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 224 | error = -ENOSPC; |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 225 | goto out_unlock; |
Nathan Scott | 572d95f | 2006-09-28 11:03:20 +1000 | [diff] [blame] | 226 | } |
| 227 | |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 228 | if (!(imap->br_startblock || XFS_IS_REALTIME_INODE(ip))) |
Dave Chinner | 6d4a8ec | 2011-03-07 10:06:35 +1100 | [diff] [blame] | 229 | error = xfs_alert_fsblock_zero(ip, imap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 231 | out_unlock: |
| 232 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 233 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 235 | out_bmap_cancel: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | xfs_bmap_cancel(&free_list); |
Dave Chinner | ea562ed | 2012-05-08 20:48:53 +1000 | [diff] [blame] | 237 | xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag); |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 238 | out_trans_cancel: |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 239 | xfs_trans_cancel(tp); |
Dave Chinner | 507630b | 2012-03-27 10:34:50 -0400 | [diff] [blame] | 240 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
| 242 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 243 | /* |
Dave Chinner | 8de2bf9 | 2009-04-06 18:49:12 +0200 | [diff] [blame] | 244 | * If the caller is doing a write at the end of the file, then extend the |
| 245 | * allocation out to the file system's write iosize. We clean up any extra |
| 246 | * space left over when the file is closed in xfs_inactive(). |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 247 | * |
| 248 | * If we find we already have delalloc preallocation beyond EOF, don't do more |
| 249 | * preallocation as it it not needed. |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 250 | */ |
| 251 | STATIC int |
| 252 | xfs_iomap_eof_want_preallocate( |
| 253 | xfs_mount_t *mp, |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 254 | xfs_inode_t *ip, |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 255 | xfs_off_t offset, |
| 256 | size_t count, |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 257 | xfs_bmbt_irec_t *imap, |
| 258 | int nimaps, |
| 259 | int *prealloc) |
| 260 | { |
| 261 | xfs_fileoff_t start_fsb; |
| 262 | xfs_filblks_t count_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 263 | int n, error, imaps; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 264 | int found_delalloc = 0; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 265 | |
| 266 | *prealloc = 0; |
Christoph Hellwig | ce7ae151 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 267 | if (offset + count <= XFS_ISIZE(ip)) |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 268 | return 0; |
| 269 | |
| 270 | /* |
Dave Chinner | 133eeb1 | 2013-06-27 16:04:48 +1000 | [diff] [blame] | 271 | * If the file is smaller than the minimum prealloc and we are using |
| 272 | * dynamic preallocation, don't do any preallocation at all as it is |
| 273 | * likely this is the only write to the file that is going to be done. |
| 274 | */ |
| 275 | if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) && |
| 276 | XFS_ISIZE(ip) < XFS_FSB_TO_B(mp, mp->m_writeio_blocks)) |
| 277 | return 0; |
| 278 | |
| 279 | /* |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 280 | * If there are any real blocks past eof, then don't |
| 281 | * do any speculative allocation. |
| 282 | */ |
| 283 | 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] | 284 | count_fsb = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 285 | while (count_fsb > 0) { |
| 286 | imaps = nimaps; |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 287 | error = xfs_bmapi_read(ip, start_fsb, count_fsb, imap, &imaps, |
| 288 | 0); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 289 | if (error) |
| 290 | return error; |
| 291 | for (n = 0; n < imaps; n++) { |
| 292 | if ((imap[n].br_startblock != HOLESTARTBLOCK) && |
| 293 | (imap[n].br_startblock != DELAYSTARTBLOCK)) |
| 294 | return 0; |
| 295 | start_fsb += imap[n].br_blockcount; |
| 296 | count_fsb -= imap[n].br_blockcount; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 297 | |
| 298 | if (imap[n].br_startblock == DELAYSTARTBLOCK) |
| 299 | found_delalloc = 1; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 300 | } |
| 301 | } |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 302 | if (!found_delalloc) |
| 303 | *prealloc = 1; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 304 | return 0; |
| 305 | } |
| 306 | |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 307 | /* |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 308 | * Determine the initial size of the preallocation. We are beyond the current |
| 309 | * EOF here, but we need to take into account whether this is a sparse write or |
| 310 | * an extending write when determining the preallocation size. Hence we need to |
| 311 | * look up the extent that ends at the current write offset and use the result |
| 312 | * to determine the preallocation size. |
| 313 | * |
| 314 | * If the extent is a hole, then preallocation is essentially disabled. |
| 315 | * Otherwise we take the size of the preceeding data extent as the basis for the |
| 316 | * preallocation size. If the size of the extent is greater than half the |
| 317 | * maximum extent length, then use the current offset as the basis. This ensures |
| 318 | * that for large files the preallocation size always extends to MAXEXTLEN |
| 319 | * rather than falling short due to things like stripe unit/width alignment of |
| 320 | * real extents. |
| 321 | */ |
Mark Tinguely | e8108ce | 2013-02-24 13:04:37 -0600 | [diff] [blame] | 322 | STATIC xfs_fsblock_t |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 323 | xfs_iomap_eof_prealloc_initial_size( |
| 324 | struct xfs_mount *mp, |
| 325 | struct xfs_inode *ip, |
| 326 | xfs_off_t offset, |
| 327 | xfs_bmbt_irec_t *imap, |
| 328 | int nimaps) |
| 329 | { |
| 330 | xfs_fileoff_t start_fsb; |
| 331 | int imaps = 1; |
| 332 | int error; |
| 333 | |
| 334 | ASSERT(nimaps >= imaps); |
| 335 | |
| 336 | /* if we are using a specific prealloc size, return now */ |
| 337 | if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) |
| 338 | return 0; |
| 339 | |
Dave Chinner | 133eeb1 | 2013-06-27 16:04:48 +1000 | [diff] [blame] | 340 | /* If the file is small, then use the minimum prealloc */ |
| 341 | if (XFS_ISIZE(ip) < XFS_FSB_TO_B(mp, mp->m_dalign)) |
| 342 | return 0; |
| 343 | |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 344 | /* |
| 345 | * As we write multiple pages, the offset will always align to the |
| 346 | * start of a page and hence point to a hole at EOF. i.e. if the size is |
| 347 | * 4096 bytes, we only have one block at FSB 0, but XFS_B_TO_FSB(4096) |
| 348 | * will return FSB 1. Hence if there are blocks in the file, we want to |
| 349 | * point to the block prior to the EOF block and not the hole that maps |
| 350 | * directly at @offset. |
| 351 | */ |
| 352 | start_fsb = XFS_B_TO_FSB(mp, offset); |
| 353 | if (start_fsb) |
| 354 | start_fsb--; |
| 355 | error = xfs_bmapi_read(ip, start_fsb, 1, imap, &imaps, XFS_BMAPI_ENTIRE); |
| 356 | if (error) |
| 357 | return 0; |
| 358 | |
| 359 | ASSERT(imaps == 1); |
| 360 | if (imap[0].br_startblock == HOLESTARTBLOCK) |
| 361 | return 0; |
| 362 | if (imap[0].br_blockcount <= (MAXEXTLEN >> 1)) |
Brian Foster | e114b5f | 2013-02-19 10:24:41 -0500 | [diff] [blame] | 363 | return imap[0].br_blockcount << 1; |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 364 | return XFS_B_TO_FSB(mp, offset); |
| 365 | } |
| 366 | |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 367 | STATIC bool |
| 368 | xfs_quota_need_throttle( |
| 369 | struct xfs_inode *ip, |
| 370 | int type, |
| 371 | xfs_fsblock_t alloc_blocks) |
| 372 | { |
| 373 | struct xfs_dquot *dq = xfs_inode_dquot(ip, type); |
| 374 | |
| 375 | if (!dq || !xfs_this_quota_on(ip->i_mount, type)) |
| 376 | return false; |
| 377 | |
| 378 | /* no hi watermark, no throttle */ |
| 379 | if (!dq->q_prealloc_hi_wmark) |
| 380 | return false; |
| 381 | |
| 382 | /* under the lo watermark, no throttle */ |
| 383 | if (dq->q_res_bcount + alloc_blocks < dq->q_prealloc_lo_wmark) |
| 384 | return false; |
| 385 | |
| 386 | return true; |
| 387 | } |
| 388 | |
| 389 | STATIC void |
| 390 | xfs_quota_calc_throttle( |
| 391 | struct xfs_inode *ip, |
| 392 | int type, |
| 393 | xfs_fsblock_t *qblocks, |
Brian Foster | f074051 | 2014-07-24 19:56:08 +1000 | [diff] [blame] | 394 | int *qshift, |
| 395 | int64_t *qfreesp) |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 396 | { |
| 397 | int64_t freesp; |
| 398 | int shift = 0; |
| 399 | struct xfs_dquot *dq = xfs_inode_dquot(ip, type); |
| 400 | |
Eric Sandeen | 5cca3f6 | 2014-10-02 09:27:09 +1000 | [diff] [blame] | 401 | /* no dq, or over hi wmark, squash the prealloc completely */ |
| 402 | if (!dq || dq->q_res_bcount >= dq->q_prealloc_hi_wmark) { |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 403 | *qblocks = 0; |
Brian Foster | f074051 | 2014-07-24 19:56:08 +1000 | [diff] [blame] | 404 | *qfreesp = 0; |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 405 | return; |
| 406 | } |
| 407 | |
| 408 | freesp = dq->q_prealloc_hi_wmark - dq->q_res_bcount; |
| 409 | if (freesp < dq->q_low_space[XFS_QLOWSP_5_PCNT]) { |
| 410 | shift = 2; |
| 411 | if (freesp < dq->q_low_space[XFS_QLOWSP_3_PCNT]) |
| 412 | shift += 2; |
| 413 | if (freesp < dq->q_low_space[XFS_QLOWSP_1_PCNT]) |
| 414 | shift += 2; |
| 415 | } |
| 416 | |
Brian Foster | f074051 | 2014-07-24 19:56:08 +1000 | [diff] [blame] | 417 | if (freesp < *qfreesp) |
| 418 | *qfreesp = freesp; |
| 419 | |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 420 | /* only overwrite the throttle values if we are more aggressive */ |
| 421 | if ((freesp >> shift) < (*qblocks >> *qshift)) { |
| 422 | *qblocks = freesp; |
| 423 | *qshift = shift; |
| 424 | } |
| 425 | } |
| 426 | |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 427 | /* |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 428 | * If we don't have a user specified preallocation size, dynamically increase |
| 429 | * the preallocation size as the size of the file grows. Cap the maximum size |
| 430 | * at a single extent or less if the filesystem is near full. The closer the |
| 431 | * filesystem is to full, the smaller the maximum prealocation. |
| 432 | */ |
| 433 | STATIC xfs_fsblock_t |
| 434 | xfs_iomap_prealloc_size( |
| 435 | struct xfs_mount *mp, |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 436 | struct xfs_inode *ip, |
| 437 | xfs_off_t offset, |
| 438 | struct xfs_bmbt_irec *imap, |
| 439 | int nimaps) |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 440 | { |
| 441 | xfs_fsblock_t alloc_blocks = 0; |
Brian Foster | 3c58b5f | 2013-03-18 10:51:43 -0400 | [diff] [blame] | 442 | int shift = 0; |
| 443 | int64_t freesp; |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 444 | xfs_fsblock_t qblocks; |
| 445 | int qshift = 0; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 446 | |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 447 | alloc_blocks = xfs_iomap_eof_prealloc_initial_size(mp, ip, offset, |
| 448 | imap, nimaps); |
Brian Foster | 3c58b5f | 2013-03-18 10:51:43 -0400 | [diff] [blame] | 449 | if (!alloc_blocks) |
| 450 | goto check_writeio; |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 451 | qblocks = alloc_blocks; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 452 | |
Brian Foster | c9bdbdc | 2013-03-18 10:51:44 -0400 | [diff] [blame] | 453 | /* |
| 454 | * MAXEXTLEN is not a power of two value but we round the prealloc down |
| 455 | * to the nearest power of two value after throttling. To prevent the |
| 456 | * round down from unconditionally reducing the maximum supported prealloc |
| 457 | * size, we round up first, apply appropriate throttling, round down and |
| 458 | * cap the value to MAXEXTLEN. |
| 459 | */ |
| 460 | alloc_blocks = XFS_FILEOFF_MIN(roundup_pow_of_two(MAXEXTLEN), |
| 461 | alloc_blocks); |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 462 | |
Dave Chinner | 0d485ad | 2015-02-23 21:22:03 +1100 | [diff] [blame] | 463 | freesp = percpu_counter_read_positive(&mp->m_fdblocks); |
Brian Foster | 3c58b5f | 2013-03-18 10:51:43 -0400 | [diff] [blame] | 464 | if (freesp < mp->m_low_space[XFS_LOWSP_5_PCNT]) { |
| 465 | shift = 2; |
| 466 | if (freesp < mp->m_low_space[XFS_LOWSP_4_PCNT]) |
| 467 | shift++; |
| 468 | if (freesp < mp->m_low_space[XFS_LOWSP_3_PCNT]) |
| 469 | shift++; |
| 470 | if (freesp < mp->m_low_space[XFS_LOWSP_2_PCNT]) |
| 471 | shift++; |
| 472 | if (freesp < mp->m_low_space[XFS_LOWSP_1_PCNT]) |
| 473 | shift++; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 474 | } |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 475 | |
| 476 | /* |
Brian Foster | f074051 | 2014-07-24 19:56:08 +1000 | [diff] [blame] | 477 | * Check each quota to cap the prealloc size, provide a shift value to |
| 478 | * throttle with and adjust amount of available space. |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 479 | */ |
| 480 | if (xfs_quota_need_throttle(ip, XFS_DQ_USER, alloc_blocks)) |
Brian Foster | f074051 | 2014-07-24 19:56:08 +1000 | [diff] [blame] | 481 | xfs_quota_calc_throttle(ip, XFS_DQ_USER, &qblocks, &qshift, |
| 482 | &freesp); |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 483 | if (xfs_quota_need_throttle(ip, XFS_DQ_GROUP, alloc_blocks)) |
Brian Foster | f074051 | 2014-07-24 19:56:08 +1000 | [diff] [blame] | 484 | xfs_quota_calc_throttle(ip, XFS_DQ_GROUP, &qblocks, &qshift, |
| 485 | &freesp); |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 486 | if (xfs_quota_need_throttle(ip, XFS_DQ_PROJ, alloc_blocks)) |
Brian Foster | f074051 | 2014-07-24 19:56:08 +1000 | [diff] [blame] | 487 | xfs_quota_calc_throttle(ip, XFS_DQ_PROJ, &qblocks, &qshift, |
| 488 | &freesp); |
Brian Foster | 76a4202 | 2013-03-18 10:51:47 -0400 | [diff] [blame] | 489 | |
| 490 | /* |
| 491 | * The final prealloc size is set to the minimum of free space available |
| 492 | * in each of the quotas and the overall filesystem. |
| 493 | * |
| 494 | * The shift throttle value is set to the maximum value as determined by |
| 495 | * the global low free space values and per-quota low free space values. |
| 496 | */ |
| 497 | alloc_blocks = MIN(alloc_blocks, qblocks); |
| 498 | shift = MAX(shift, qshift); |
| 499 | |
Brian Foster | 3c58b5f | 2013-03-18 10:51:43 -0400 | [diff] [blame] | 500 | if (shift) |
| 501 | alloc_blocks >>= shift; |
Brian Foster | c9bdbdc | 2013-03-18 10:51:44 -0400 | [diff] [blame] | 502 | /* |
| 503 | * rounddown_pow_of_two() returns an undefined result if we pass in |
| 504 | * alloc_blocks = 0. |
| 505 | */ |
| 506 | if (alloc_blocks) |
| 507 | alloc_blocks = rounddown_pow_of_two(alloc_blocks); |
| 508 | if (alloc_blocks > MAXEXTLEN) |
| 509 | alloc_blocks = MAXEXTLEN; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 510 | |
Brian Foster | 3c58b5f | 2013-03-18 10:51:43 -0400 | [diff] [blame] | 511 | /* |
| 512 | * If we are still trying to allocate more space than is |
| 513 | * available, squash the prealloc hard. This can happen if we |
| 514 | * have a large file on a small filesystem and the above |
| 515 | * lowspace thresholds are smaller than MAXEXTLEN. |
| 516 | */ |
| 517 | while (alloc_blocks && alloc_blocks >= freesp) |
| 518 | alloc_blocks >>= 4; |
| 519 | |
| 520 | check_writeio: |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 521 | if (alloc_blocks < mp->m_writeio_blocks) |
| 522 | alloc_blocks = mp->m_writeio_blocks; |
| 523 | |
Brian Foster | 19cb7e3 | 2013-03-18 10:51:48 -0400 | [diff] [blame] | 524 | trace_xfs_iomap_prealloc_size(ip, alloc_blocks, shift, |
| 525 | mp->m_writeio_blocks); |
| 526 | |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 527 | return alloc_blocks; |
| 528 | } |
| 529 | |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 530 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | xfs_iomap_write_delay( |
| 532 | xfs_inode_t *ip, |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 533 | xfs_off_t offset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | size_t count, |
Christoph Hellwig | 405f804 | 2010-12-10 08:42:19 +0000 | [diff] [blame] | 535 | xfs_bmbt_irec_t *ret_imap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | { |
| 537 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | xfs_fileoff_t offset_fsb; |
| 539 | xfs_fileoff_t last_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 540 | xfs_off_t aligned_offset; |
| 541 | xfs_fileoff_t ioalign; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 542 | xfs_extlen_t extsz; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | int nimaps; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | xfs_bmbt_irec_t imap[XFS_WRITE_IMAPS]; |
Dave Chinner | 9aa0500 | 2012-10-08 21:56:04 +1100 | [diff] [blame] | 545 | int prealloc; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 546 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 548 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | |
| 550 | /* |
| 551 | * Make sure that the dquots are there. This doesn't hold |
| 552 | * the ilock across a disk read. |
| 553 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 554 | error = xfs_qm_dqattach_locked(ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | if (error) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 556 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | |
David Chinner | 957d0eb | 2007-06-18 16:50:37 +1000 | [diff] [blame] | 558 | extsz = xfs_get_extsz_hint(ip); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 559 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 560 | |
Lachlan McIlroy | 9f6c92b | 2008-12-22 17:56:49 +1100 | [diff] [blame] | 561 | error = xfs_iomap_eof_want_preallocate(mp, ip, offset, count, |
Christoph Hellwig | 405f804 | 2010-12-10 08:42:19 +0000 | [diff] [blame] | 562 | imap, XFS_WRITE_IMAPS, &prealloc); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 563 | if (error) |
| 564 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
Dave Chinner | 8de2bf9 | 2009-04-06 18:49:12 +0200 | [diff] [blame] | 566 | retry: |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 567 | if (prealloc) { |
Dave Chinner | a1e16c2 | 2013-02-11 16:05:01 +1100 | [diff] [blame] | 568 | xfs_fsblock_t alloc_blocks; |
| 569 | |
| 570 | alloc_blocks = xfs_iomap_prealloc_size(mp, ip, offset, imap, |
| 571 | XFS_WRITE_IMAPS); |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 572 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | aligned_offset = XFS_WRITEIO_ALIGN(mp, (offset + count - 1)); |
| 574 | ioalign = XFS_B_TO_FSBT(mp, aligned_offset); |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 575 | last_fsb = ioalign + alloc_blocks; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 576 | } else { |
| 577 | last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | } |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 579 | |
| 580 | if (prealloc || extsz) { |
Lachlan McIlroy | 9f6c92b | 2008-12-22 17:56:49 +1100 | [diff] [blame] | 581 | error = xfs_iomap_eof_align_last_fsb(mp, ip, extsz, &last_fsb); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 582 | if (error) |
| 583 | return error; |
| 584 | } |
| 585 | |
Dave Chinner | 3ed9116 | 2012-04-29 22:43:19 +1000 | [diff] [blame] | 586 | /* |
| 587 | * Make sure preallocation does not create extents beyond the range we |
| 588 | * actually support in this filesystem. |
| 589 | */ |
Dave Chinner | d2c2819 | 2012-06-08 15:44:53 +1000 | [diff] [blame] | 590 | if (last_fsb > XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes)) |
| 591 | last_fsb = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes); |
Dave Chinner | 3ed9116 | 2012-04-29 22:43:19 +1000 | [diff] [blame] | 592 | |
| 593 | ASSERT(last_fsb > offset_fsb); |
| 594 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | nimaps = XFS_WRITE_IMAPS; |
Christoph Hellwig | 4403280 | 2011-09-18 20:40:48 +0000 | [diff] [blame] | 596 | error = xfs_bmapi_delay(ip, offset_fsb, last_fsb - offset_fsb, |
| 597 | imap, &nimaps, XFS_BMAPI_ENTIRE); |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 598 | switch (error) { |
| 599 | case 0: |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 600 | case -ENOSPC: |
| 601 | case -EDQUOT: |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 602 | break; |
| 603 | default: |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 604 | return error; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 605 | } |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 606 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | /* |
Dave Chinner | 9aa0500 | 2012-10-08 21:56:04 +1100 | [diff] [blame] | 608 | * If bmapi returned us nothing, we got either ENOSPC or EDQUOT. Retry |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 609 | * without EOF preallocation. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | */ |
| 611 | if (nimaps == 0) { |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 612 | trace_xfs_delalloc_enospc(ip, offset, count); |
Dave Chinner | 9aa0500 | 2012-10-08 21:56:04 +1100 | [diff] [blame] | 613 | if (prealloc) { |
| 614 | prealloc = 0; |
| 615 | error = 0; |
| 616 | goto retry; |
Dave Chinner | 055388a | 2011-01-04 11:35:03 +1100 | [diff] [blame] | 617 | } |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 618 | return error ? error : -ENOSPC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | } |
| 620 | |
David Chinner | 86c4d62 | 2008-04-29 12:53:21 +1000 | [diff] [blame] | 621 | if (!(imap[0].br_startblock || XFS_IS_REALTIME_INODE(ip))) |
Dave Chinner | 6d4a8ec | 2011-03-07 10:06:35 +1100 | [diff] [blame] | 622 | return xfs_alert_fsblock_zero(ip, &imap[0]); |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 623 | |
Brian Foster | 27b5286 | 2012-11-06 09:50:38 -0500 | [diff] [blame] | 624 | /* |
| 625 | * Tag the inode as speculatively preallocated so we can reclaim this |
| 626 | * space on demand, if necessary. |
| 627 | */ |
| 628 | if (prealloc) |
| 629 | xfs_inode_set_eofblocks_tag(ip); |
| 630 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 631 | *ret_imap = imap[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | return 0; |
| 633 | } |
| 634 | |
| 635 | /* |
| 636 | * Pass in a delayed allocate extent, convert it to real extents; |
| 637 | * return to the caller the extent we create which maps on top of |
| 638 | * the originating callers request. |
| 639 | * |
| 640 | * Called without a lock on the inode. |
David Chinner | e4143a1 | 2007-11-23 16:29:11 +1100 | [diff] [blame] | 641 | * |
| 642 | * We no longer bother to look at the incoming map - all we have to |
| 643 | * guarantee is that whatever we allocate fills the required range. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | */ |
Christoph Hellwig | a206c81 | 2010-12-10 08:42:20 +0000 | [diff] [blame] | 645 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | xfs_iomap_write_allocate( |
| 647 | xfs_inode_t *ip, |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 648 | xfs_off_t offset, |
Christoph Hellwig | 405f804 | 2010-12-10 08:42:19 +0000 | [diff] [blame] | 649 | xfs_bmbt_irec_t *imap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | { |
| 651 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | xfs_fileoff_t offset_fsb, last_block; |
| 653 | xfs_fileoff_t end_fsb, map_start_fsb; |
| 654 | xfs_fsblock_t first_block; |
| 655 | xfs_bmap_free_t free_list; |
| 656 | xfs_filblks_t count_fsb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | xfs_trans_t *tp; |
David Chinner | e4143a1 | 2007-11-23 16:29:11 +1100 | [diff] [blame] | 658 | int nimaps, committed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | int error = 0; |
| 660 | int nres; |
| 661 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | /* |
| 663 | * Make sure that the dquots are there. |
| 664 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 665 | error = xfs_qm_dqattach(ip, 0); |
| 666 | if (error) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 667 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 669 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 670 | count_fsb = imap->br_blockcount; |
| 671 | map_start_fsb = imap->br_startoff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | |
| 673 | XFS_STATS_ADD(xs_xstrat_bytes, XFS_FSB_TO_B(mp, count_fsb)); |
| 674 | |
| 675 | while (count_fsb != 0) { |
| 676 | /* |
| 677 | * Set up a transaction with which to allocate the |
| 678 | * backing store for the file. Do allocations in a |
| 679 | * loop until we get some space in the range we are |
| 680 | * interested in. The other space that might be allocated |
| 681 | * is in the delayed allocation extent on which we sit |
| 682 | * but before our buffer starts. |
| 683 | */ |
| 684 | |
| 685 | nimaps = 0; |
| 686 | while (nimaps == 0) { |
| 687 | tp = xfs_trans_alloc(mp, XFS_TRANS_STRAT_WRITE); |
David Chinner | 84e1e99 | 2007-06-18 16:50:27 +1000 | [diff] [blame] | 688 | tp->t_flags |= XFS_TRANS_RESERVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | nres = XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK); |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 690 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write, |
| 691 | nres, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | if (error) { |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 693 | xfs_trans_cancel(tp); |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 694 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | } |
| 696 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 697 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 699 | xfs_bmap_init(&free_list, &first_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | /* |
David Chinner | e4143a1 | 2007-11-23 16:29:11 +1100 | [diff] [blame] | 702 | * it is possible that the extents have changed since |
| 703 | * we did the read call as we dropped the ilock for a |
| 704 | * while. We have to be careful about truncates or hole |
| 705 | * punchs here - we are not allowed to allocate |
| 706 | * non-delalloc blocks here. |
| 707 | * |
| 708 | * The only protection against truncation is the pages |
| 709 | * for the range we are being asked to convert are |
| 710 | * locked and hence a truncate will block on them |
| 711 | * first. |
| 712 | * |
| 713 | * As a result, if we go beyond the range we really |
| 714 | * need and hit an delalloc extent boundary followed by |
| 715 | * a hole while we have excess blocks in the map, we |
| 716 | * will fill the hole incorrectly and overrun the |
| 717 | * transaction reservation. |
| 718 | * |
| 719 | * Using a single map prevents this as we are forced to |
| 720 | * check each map we look for overlap with the desired |
| 721 | * range and abort as soon as we find it. Also, given |
| 722 | * that we only return a single map, having one beyond |
| 723 | * what we can return is probably a bit silly. |
| 724 | * |
| 725 | * We also need to check that we don't go beyond EOF; |
| 726 | * this is a truncate optimisation as a truncate sets |
| 727 | * the new file size before block on the pages we |
| 728 | * currently have locked under writeback. Because they |
| 729 | * are about to be tossed, we don't need to write them |
| 730 | * back.... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | */ |
David Chinner | e4143a1 | 2007-11-23 16:29:11 +1100 | [diff] [blame] | 732 | nimaps = 1; |
Christoph Hellwig | ce7ae151 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 733 | end_fsb = XFS_B_TO_FSB(mp, XFS_ISIZE(ip)); |
Eric Sandeen | 7fb2cd4 | 2014-04-14 18:58:05 +1000 | [diff] [blame] | 734 | error = xfs_bmap_last_offset(ip, &last_block, |
David Chinner | 7c9ef85 | 2008-04-10 12:21:59 +1000 | [diff] [blame] | 735 | XFS_DATA_FORK); |
| 736 | if (error) |
| 737 | goto trans_cancel; |
| 738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | last_block = XFS_FILEOFF_MAX(last_block, end_fsb); |
| 740 | if ((map_start_fsb + count_fsb) > last_block) { |
| 741 | count_fsb = last_block - map_start_fsb; |
| 742 | if (count_fsb == 0) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 743 | error = -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | goto trans_cancel; |
| 745 | } |
| 746 | } |
| 747 | |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 748 | /* |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 749 | * From this point onwards we overwrite the imap |
| 750 | * pointer that the caller gave to us. |
| 751 | */ |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 752 | error = xfs_bmapi_write(tp, ip, map_start_fsb, |
Dave Chinner | cf11da9 | 2014-07-15 07:08:24 +1000 | [diff] [blame] | 753 | count_fsb, 0, |
Dave Chinner | 2455881 | 2012-10-05 11:06:58 +1000 | [diff] [blame] | 754 | &first_block, 1, |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 755 | imap, &nimaps, &free_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | if (error) |
| 757 | goto trans_cancel; |
| 758 | |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 759 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | if (error) |
| 761 | goto trans_cancel; |
| 762 | |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 763 | error = xfs_trans_commit(tp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | if (error) |
| 765 | goto error0; |
| 766 | |
| 767 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 768 | } |
| 769 | |
| 770 | /* |
| 771 | * See if we were able to allocate an extent that |
| 772 | * covers at least part of the callers request |
| 773 | */ |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 774 | if (!(imap->br_startblock || XFS_IS_REALTIME_INODE(ip))) |
Dave Chinner | 6d4a8ec | 2011-03-07 10:06:35 +1100 | [diff] [blame] | 775 | return xfs_alert_fsblock_zero(ip, imap); |
David Chinner | 86c4d62 | 2008-04-29 12:53:21 +1000 | [diff] [blame] | 776 | |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 777 | if ((offset_fsb >= imap->br_startoff) && |
| 778 | (offset_fsb < (imap->br_startoff + |
| 779 | imap->br_blockcount))) { |
David Chinner | e4143a1 | 2007-11-23 16:29:11 +1100 | [diff] [blame] | 780 | XFS_STATS_INC(xs_xstrat_quick); |
| 781 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | } |
| 783 | |
David Chinner | e4143a1 | 2007-11-23 16:29:11 +1100 | [diff] [blame] | 784 | /* |
| 785 | * So far we have not mapped the requested part of the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | * file, just surrounding data, try again. |
| 787 | */ |
Christoph Hellwig | 3070451 | 2010-06-24 11:42:19 +1000 | [diff] [blame] | 788 | count_fsb -= imap->br_blockcount; |
| 789 | map_start_fsb = imap->br_startoff + imap->br_blockcount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | } |
| 791 | |
| 792 | trans_cancel: |
| 793 | xfs_bmap_cancel(&free_list); |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 794 | xfs_trans_cancel(tp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | error0: |
| 796 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 797 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | } |
| 799 | |
| 800 | int |
| 801 | xfs_iomap_write_unwritten( |
| 802 | xfs_inode_t *ip, |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 803 | xfs_off_t offset, |
Christoph Hellwig | d32057f | 2015-01-09 10:48:12 +1100 | [diff] [blame] | 804 | xfs_off_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | { |
| 806 | xfs_mount_t *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | xfs_fileoff_t offset_fsb; |
| 808 | xfs_filblks_t count_fsb; |
| 809 | xfs_filblks_t numblks_fsb; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 810 | xfs_fsblock_t firstfsb; |
| 811 | int nimaps; |
| 812 | xfs_trans_t *tp; |
| 813 | xfs_bmbt_irec_t imap; |
| 814 | xfs_bmap_free_t free_list; |
Christoph Hellwig | 84803fb | 2012-02-29 09:53:50 +0000 | [diff] [blame] | 815 | xfs_fsize_t i_size; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 816 | uint resblks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | int committed; |
| 818 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 820 | trace_xfs_unwritten_convert(ip, offset, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | |
| 822 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
| 823 | count_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count); |
| 824 | count_fsb = (xfs_filblks_t)(count_fsb - offset_fsb); |
| 825 | |
Lachlan McIlroy | 4ddd8bb | 2008-06-27 13:32:53 +1000 | [diff] [blame] | 826 | /* |
| 827 | * Reserve enough blocks in this transaction for two complete extent |
| 828 | * btree splits. We may be converting the middle part of an unwritten |
| 829 | * extent and in this case we will insert two new extents in the btree |
| 830 | * each of which could cause a full split. |
| 831 | * |
| 832 | * This reservation amount will be used in the first call to |
| 833 | * xfs_bmbt_split() to select an AG with enough space to satisfy the |
| 834 | * rest of the operation. |
| 835 | */ |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 836 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0) << 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 838 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | /* |
| 840 | * set up a transaction to convert the range of extents |
| 841 | * from unwritten to real. Do allocations in a loop until |
| 842 | * we have covered the range passed in. |
Christoph Hellwig | 80641dc | 2009-10-19 04:00:03 +0000 | [diff] [blame] | 843 | * |
| 844 | * Note that we open code the transaction allocation here |
| 845 | * to pass KM_NOFS--we can't risk to recursing back into |
| 846 | * the filesystem here as we might be asked to write out |
| 847 | * the same inode that we complete here and might deadlock |
| 848 | * on the iolock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | */ |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 850 | sb_start_intwrite(mp->m_super); |
Christoph Hellwig | 80641dc | 2009-10-19 04:00:03 +0000 | [diff] [blame] | 851 | tp = _xfs_trans_alloc(mp, XFS_TRANS_STRAT_WRITE, KM_NOFS); |
Jan Kara | d9457dc | 2012-06-12 16:20:39 +0200 | [diff] [blame] | 852 | tp->t_flags |= XFS_TRANS_RESERVE | XFS_TRANS_FREEZE_PROT; |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 853 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write, |
| 854 | resblks, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | if (error) { |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 856 | xfs_trans_cancel(tp); |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 857 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | } |
| 859 | |
| 860 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 861 | xfs_trans_ijoin(tp, ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | |
| 863 | /* |
| 864 | * Modify the unwritten extent state of the buffer. |
| 865 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 866 | xfs_bmap_init(&free_list, &firstfsb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | nimaps = 1; |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 868 | error = xfs_bmapi_write(tp, ip, offset_fsb, count_fsb, |
| 869 | XFS_BMAPI_CONVERT, &firstfsb, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 870 | 1, &imap, &nimaps, &free_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | if (error) |
| 872 | goto error_on_bmapi_transaction; |
| 873 | |
Christoph Hellwig | 84803fb | 2012-02-29 09:53:50 +0000 | [diff] [blame] | 874 | /* |
| 875 | * Log the updated inode size as we go. We have to be careful |
| 876 | * to only log it up to the actual write offset if it is |
| 877 | * halfway into a block. |
| 878 | */ |
| 879 | i_size = XFS_FSB_TO_B(mp, offset_fsb + count_fsb); |
| 880 | if (i_size > offset + count) |
| 881 | i_size = offset + count; |
| 882 | |
| 883 | i_size = xfs_new_eof(ip, i_size); |
| 884 | if (i_size) { |
| 885 | ip->i_d.di_size = i_size; |
| 886 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 887 | } |
| 888 | |
| 889 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | if (error) |
| 891 | goto error_on_bmapi_transaction; |
| 892 | |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 893 | error = xfs_trans_commit(tp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 895 | if (error) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 896 | return error; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 897 | |
David Chinner | 86c4d62 | 2008-04-29 12:53:21 +1000 | [diff] [blame] | 898 | if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip))) |
Dave Chinner | 6d4a8ec | 2011-03-07 10:06:35 +1100 | [diff] [blame] | 899 | return xfs_alert_fsblock_zero(ip, &imap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | |
| 901 | if ((numblks_fsb = imap.br_blockcount) == 0) { |
| 902 | /* |
| 903 | * The numblks_fsb value should always get |
| 904 | * smaller, otherwise the loop is stuck. |
| 905 | */ |
| 906 | ASSERT(imap.br_blockcount); |
| 907 | break; |
| 908 | } |
| 909 | offset_fsb += numblks_fsb; |
| 910 | count_fsb -= numblks_fsb; |
| 911 | } while (count_fsb > 0); |
| 912 | |
| 913 | return 0; |
| 914 | |
| 915 | error_on_bmapi_transaction: |
| 916 | xfs_bmap_cancel(&free_list); |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 917 | xfs_trans_cancel(tp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 919 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | } |