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 | */ |
Robert P. J. Day | 40ebd81 | 2007-11-23 16:30:51 +1100 | [diff] [blame] | 18 | #include <linux/log2.h> |
| 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include "xfs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 21 | #include "xfs_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include "xfs_types.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 23 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 25 | #include "xfs_inum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include "xfs_trans.h" |
| 27 | #include "xfs_trans_priv.h" |
| 28 | #include "xfs_sb.h" |
| 29 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include "xfs_bmap_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 32 | #include "xfs_alloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "xfs_ialloc_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 34 | #include "xfs_attr_sf.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include "xfs_dinode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "xfs_inode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include "xfs_buf_item.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 38 | #include "xfs_inode_item.h" |
| 39 | #include "xfs_btree.h" |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 40 | #include "xfs_btree_trace.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 41 | #include "xfs_alloc.h" |
| 42 | #include "xfs_ialloc.h" |
| 43 | #include "xfs_bmap.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include "xfs_utils.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include "xfs_quota.h" |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 47 | #include "xfs_filestream.h" |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 48 | #include "xfs_vnodeops.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 49 | #include "xfs_trace.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | kmem_zone_t *xfs_ifork_zone; |
| 52 | kmem_zone_t *xfs_inode_zone; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | /* |
| 55 | * Used in xfs_itruncate(). This is the maximum number of extents |
| 56 | * freed from a file in a single transaction. |
| 57 | */ |
| 58 | #define XFS_ITRUNC_MAX_EXTENTS 2 |
| 59 | |
| 60 | STATIC int xfs_iflush_int(xfs_inode_t *, xfs_buf_t *); |
| 61 | STATIC int xfs_iformat_local(xfs_inode_t *, xfs_dinode_t *, int, int); |
| 62 | STATIC int xfs_iformat_extents(xfs_inode_t *, xfs_dinode_t *, int); |
| 63 | STATIC int xfs_iformat_btree(xfs_inode_t *, xfs_dinode_t *, int); |
| 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #ifdef DEBUG |
| 66 | /* |
| 67 | * Make sure that the extents in the given memory buffer |
| 68 | * are valid. |
| 69 | */ |
| 70 | STATIC void |
| 71 | xfs_validate_extents( |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 72 | xfs_ifork_t *ifp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | int nrecs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | xfs_exntfmt_t fmt) |
| 75 | { |
| 76 | xfs_bmbt_irec_t irec; |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 77 | xfs_bmbt_rec_host_t rec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | int i; |
| 79 | |
| 80 | for (i = 0; i < nrecs; i++) { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 81 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, i); |
| 82 | rec.l0 = get_unaligned(&ep->l0); |
| 83 | rec.l1 = get_unaligned(&ep->l1); |
| 84 | xfs_bmbt_get_all(&rec, &irec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | if (fmt == XFS_EXTFMT_NOSTATE) |
| 86 | ASSERT(irec.br_state == XFS_EXT_NORM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | } |
| 88 | } |
| 89 | #else /* DEBUG */ |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 90 | #define xfs_validate_extents(ifp, nrecs, fmt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | #endif /* DEBUG */ |
| 92 | |
| 93 | /* |
| 94 | * Check that none of the inode's in the buffer have a next |
| 95 | * unlinked field of 0. |
| 96 | */ |
| 97 | #if defined(DEBUG) |
| 98 | void |
| 99 | xfs_inobp_check( |
| 100 | xfs_mount_t *mp, |
| 101 | xfs_buf_t *bp) |
| 102 | { |
| 103 | int i; |
| 104 | int j; |
| 105 | xfs_dinode_t *dip; |
| 106 | |
| 107 | j = mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog; |
| 108 | |
| 109 | for (i = 0; i < j; i++) { |
| 110 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, |
| 111 | i * mp->m_sb.sb_inodesize); |
| 112 | if (!dip->di_next_unlinked) { |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 113 | xfs_alert(mp, |
| 114 | "Detected bogus zero next_unlinked field in incore inode buffer 0x%p.", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | bp); |
| 116 | ASSERT(dip->di_next_unlinked); |
| 117 | } |
| 118 | } |
| 119 | } |
| 120 | #endif |
| 121 | |
| 122 | /* |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 123 | * Find the buffer associated with the given inode map |
| 124 | * We do basic validation checks on the buffer once it has been |
| 125 | * retrieved from disk. |
| 126 | */ |
| 127 | STATIC int |
| 128 | xfs_imap_to_bp( |
| 129 | xfs_mount_t *mp, |
| 130 | xfs_trans_t *tp, |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 131 | struct xfs_imap *imap, |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 132 | xfs_buf_t **bpp, |
| 133 | uint buf_flags, |
Christoph Hellwig | b48d8d6 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 134 | uint iget_flags) |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 135 | { |
| 136 | int error; |
| 137 | int i; |
| 138 | int ni; |
| 139 | xfs_buf_t *bp; |
| 140 | |
| 141 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, imap->im_blkno, |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 142 | (int)imap->im_len, buf_flags, &bp); |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 143 | if (error) { |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 144 | if (error != EAGAIN) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 145 | xfs_warn(mp, |
| 146 | "%s: xfs_trans_read_buf() returned error %d.", |
| 147 | __func__, error); |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 148 | } else { |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 149 | ASSERT(buf_flags & XBF_TRYLOCK); |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 150 | } |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 151 | return error; |
| 152 | } |
| 153 | |
| 154 | /* |
| 155 | * Validate the magic number and version of every inode in the buffer |
| 156 | * (if DEBUG kernel) or the first inode in the buffer, otherwise. |
| 157 | */ |
| 158 | #ifdef DEBUG |
| 159 | ni = BBTOB(imap->im_len) >> mp->m_sb.sb_inodelog; |
| 160 | #else /* usual case */ |
| 161 | ni = 1; |
| 162 | #endif |
| 163 | |
| 164 | for (i = 0; i < ni; i++) { |
| 165 | int di_ok; |
| 166 | xfs_dinode_t *dip; |
| 167 | |
| 168 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, |
| 169 | (i << mp->m_sb.sb_inodelog)); |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 170 | di_ok = be16_to_cpu(dip->di_magic) == XFS_DINODE_MAGIC && |
| 171 | XFS_DINODE_GOOD_VERSION(dip->di_version); |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 172 | if (unlikely(XFS_TEST_ERROR(!di_ok, mp, |
| 173 | XFS_ERRTAG_ITOBP_INOTOBP, |
| 174 | XFS_RANDOM_ITOBP_INOTOBP))) { |
Dave Chinner | 1920779 | 2010-06-24 11:15:47 +1000 | [diff] [blame] | 175 | if (iget_flags & XFS_IGET_UNTRUSTED) { |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 176 | xfs_trans_brelse(tp, bp); |
| 177 | return XFS_ERROR(EINVAL); |
| 178 | } |
| 179 | XFS_CORRUPTION_ERROR("xfs_imap_to_bp", |
| 180 | XFS_ERRLEVEL_HIGH, mp, dip); |
| 181 | #ifdef DEBUG |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 182 | xfs_emerg(mp, |
| 183 | "bad inode magic/vsn daddr %lld #%d (magic=%x)", |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 184 | (unsigned long long)imap->im_blkno, i, |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 185 | be16_to_cpu(dip->di_magic)); |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 186 | ASSERT(0); |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 187 | #endif |
| 188 | xfs_trans_brelse(tp, bp); |
| 189 | return XFS_ERROR(EFSCORRUPTED); |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | xfs_inobp_check(mp, bp); |
| 194 | |
| 195 | /* |
| 196 | * Mark the buffer as an inode buffer now that it looks good |
| 197 | */ |
| 198 | XFS_BUF_SET_VTYPE(bp, B_FS_INO); |
| 199 | |
| 200 | *bpp = bp; |
| 201 | return 0; |
| 202 | } |
| 203 | |
| 204 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | * This routine is called to map an inode number within a file |
| 206 | * system to the buffer containing the on-disk version of the |
| 207 | * inode. It returns a pointer to the buffer containing the |
| 208 | * on-disk inode in the bpp parameter, and in the dip parameter |
| 209 | * it returns a pointer to the on-disk inode within that buffer. |
| 210 | * |
| 211 | * If a non-zero error is returned, then the contents of bpp and |
| 212 | * dipp are undefined. |
| 213 | * |
| 214 | * Use xfs_imap() to determine the size and location of the |
| 215 | * buffer to read from disk. |
| 216 | */ |
Christoph Hellwig | c679eef | 2008-10-30 18:04:13 +1100 | [diff] [blame] | 217 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | xfs_inotobp( |
| 219 | xfs_mount_t *mp, |
| 220 | xfs_trans_t *tp, |
| 221 | xfs_ino_t ino, |
| 222 | xfs_dinode_t **dipp, |
| 223 | xfs_buf_t **bpp, |
Christoph Hellwig | c679eef | 2008-10-30 18:04:13 +1100 | [diff] [blame] | 224 | int *offset, |
| 225 | uint imap_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | { |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 227 | struct xfs_imap imap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | xfs_buf_t *bp; |
| 229 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | imap.im_blkno = 0; |
Christoph Hellwig | a194189 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 232 | error = xfs_imap(mp, tp, ino, &imap, imap_flags); |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 233 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 236 | error = xfs_imap_to_bp(mp, tp, &imap, &bp, XBF_LOCK, imap_flags); |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 237 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | *dipp = (xfs_dinode_t *)xfs_buf_offset(bp, imap.im_boffset); |
| 241 | *bpp = bp; |
| 242 | *offset = imap.im_boffset; |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | |
| 247 | /* |
| 248 | * This routine is called to map an inode to the buffer containing |
| 249 | * the on-disk version of the inode. It returns a pointer to the |
| 250 | * buffer containing the on-disk inode in the bpp parameter, and in |
| 251 | * the dip parameter it returns a pointer to the on-disk inode within |
| 252 | * that buffer. |
| 253 | * |
| 254 | * If a non-zero error is returned, then the contents of bpp and |
| 255 | * dipp are undefined. |
| 256 | * |
Christoph Hellwig | 76d8b27 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 257 | * The inode is expected to already been mapped to its buffer and read |
| 258 | * in once, thus we can use the mapping information stored in the inode |
| 259 | * rather than calling xfs_imap(). This allows us to avoid the overhead |
| 260 | * of looking at the inode btree for small block file systems |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 261 | * (see xfs_imap()). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | */ |
| 263 | int |
| 264 | xfs_itobp( |
| 265 | xfs_mount_t *mp, |
| 266 | xfs_trans_t *tp, |
| 267 | xfs_inode_t *ip, |
| 268 | xfs_dinode_t **dipp, |
| 269 | xfs_buf_t **bpp, |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 270 | uint buf_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | { |
| 272 | xfs_buf_t *bp; |
| 273 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 275 | ASSERT(ip->i_imap.im_blkno != 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 277 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &bp, buf_flags, 0); |
David Chinner | 4ae29b4 | 2008-03-06 13:43:34 +1100 | [diff] [blame] | 278 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | return error; |
Nathan Scott | 4d1a2ed | 2006-06-09 17:12:28 +1000 | [diff] [blame] | 280 | |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 281 | if (!bp) { |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 282 | ASSERT(buf_flags & XBF_TRYLOCK); |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 283 | ASSERT(tp == NULL); |
| 284 | *bpp = NULL; |
| 285 | return EAGAIN; |
| 286 | } |
| 287 | |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 288 | *dipp = (xfs_dinode_t *)xfs_buf_offset(bp, ip->i_imap.im_boffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | *bpp = bp; |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | /* |
| 294 | * Move inode type and inode format specific information from the |
| 295 | * on-disk inode to the in-core inode. For fifos, devs, and sockets |
| 296 | * this means set if_rdev to the proper value. For files, directories, |
| 297 | * and symlinks this means to bring in the in-line data or extent |
| 298 | * pointers. For a file in B-tree format, only the root is immediately |
| 299 | * brought in-core. The rest will be in-lined in if_extents when it |
| 300 | * is first referenced (see xfs_iread_extents()). |
| 301 | */ |
| 302 | STATIC int |
| 303 | xfs_iformat( |
| 304 | xfs_inode_t *ip, |
| 305 | xfs_dinode_t *dip) |
| 306 | { |
| 307 | xfs_attr_shortform_t *atp; |
| 308 | int size; |
| 309 | int error; |
| 310 | xfs_fsize_t di_size; |
| 311 | ip->i_df.if_ext_max = |
| 312 | XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t); |
| 313 | error = 0; |
| 314 | |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 315 | if (unlikely(be32_to_cpu(dip->di_nextents) + |
| 316 | be16_to_cpu(dip->di_anextents) > |
| 317 | be64_to_cpu(dip->di_nblocks))) { |
Dave Chinner | 65333b4 | 2011-03-07 10:03:35 +1100 | [diff] [blame] | 318 | xfs_warn(ip->i_mount, |
Nathan Scott | 3762ec6 | 2006-01-12 10:29:53 +1100 | [diff] [blame] | 319 | "corrupt dinode %Lu, extent total = %d, nblocks = %Lu.", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | (unsigned long long)ip->i_ino, |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 321 | (int)(be32_to_cpu(dip->di_nextents) + |
| 322 | be16_to_cpu(dip->di_anextents)), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | (unsigned long long) |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 324 | be64_to_cpu(dip->di_nblocks)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | XFS_CORRUPTION_ERROR("xfs_iformat(1)", XFS_ERRLEVEL_LOW, |
| 326 | ip->i_mount, dip); |
| 327 | return XFS_ERROR(EFSCORRUPTED); |
| 328 | } |
| 329 | |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 330 | if (unlikely(dip->di_forkoff > ip->i_mount->m_sb.sb_inodesize)) { |
Dave Chinner | 65333b4 | 2011-03-07 10:03:35 +1100 | [diff] [blame] | 331 | xfs_warn(ip->i_mount, "corrupt dinode %Lu, forkoff = 0x%x.", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | (unsigned long long)ip->i_ino, |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 333 | dip->di_forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | XFS_CORRUPTION_ERROR("xfs_iformat(2)", XFS_ERRLEVEL_LOW, |
| 335 | ip->i_mount, dip); |
| 336 | return XFS_ERROR(EFSCORRUPTED); |
| 337 | } |
| 338 | |
Christoph Hellwig | b89d420 | 2009-08-10 11:32:18 -0300 | [diff] [blame] | 339 | if (unlikely((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) && |
| 340 | !ip->i_mount->m_rtdev_targp)) { |
Dave Chinner | 65333b4 | 2011-03-07 10:03:35 +1100 | [diff] [blame] | 341 | xfs_warn(ip->i_mount, |
Christoph Hellwig | b89d420 | 2009-08-10 11:32:18 -0300 | [diff] [blame] | 342 | "corrupt dinode %Lu, has realtime flag set.", |
| 343 | ip->i_ino); |
| 344 | XFS_CORRUPTION_ERROR("xfs_iformat(realtime)", |
| 345 | XFS_ERRLEVEL_LOW, ip->i_mount, dip); |
| 346 | return XFS_ERROR(EFSCORRUPTED); |
| 347 | } |
| 348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | switch (ip->i_d.di_mode & S_IFMT) { |
| 350 | case S_IFIFO: |
| 351 | case S_IFCHR: |
| 352 | case S_IFBLK: |
| 353 | case S_IFSOCK: |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 354 | if (unlikely(dip->di_format != XFS_DINODE_FMT_DEV)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | XFS_CORRUPTION_ERROR("xfs_iformat(3)", XFS_ERRLEVEL_LOW, |
| 356 | ip->i_mount, dip); |
| 357 | return XFS_ERROR(EFSCORRUPTED); |
| 358 | } |
| 359 | ip->i_d.di_size = 0; |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 360 | ip->i_size = 0; |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 361 | ip->i_df.if_u2.if_rdev = xfs_dinode_get_rdev(dip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | break; |
| 363 | |
| 364 | case S_IFREG: |
| 365 | case S_IFLNK: |
| 366 | case S_IFDIR: |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 367 | switch (dip->di_format) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | case XFS_DINODE_FMT_LOCAL: |
| 369 | /* |
| 370 | * no local regular files yet |
| 371 | */ |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 372 | if (unlikely((be16_to_cpu(dip->di_mode) & S_IFMT) == S_IFREG)) { |
Dave Chinner | 65333b4 | 2011-03-07 10:03:35 +1100 | [diff] [blame] | 373 | xfs_warn(ip->i_mount, |
| 374 | "corrupt inode %Lu (local format for regular file).", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | (unsigned long long) ip->i_ino); |
| 376 | XFS_CORRUPTION_ERROR("xfs_iformat(4)", |
| 377 | XFS_ERRLEVEL_LOW, |
| 378 | ip->i_mount, dip); |
| 379 | return XFS_ERROR(EFSCORRUPTED); |
| 380 | } |
| 381 | |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 382 | di_size = be64_to_cpu(dip->di_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | if (unlikely(di_size > XFS_DFORK_DSIZE(dip, ip->i_mount))) { |
Dave Chinner | 65333b4 | 2011-03-07 10:03:35 +1100 | [diff] [blame] | 384 | xfs_warn(ip->i_mount, |
| 385 | "corrupt inode %Lu (bad size %Ld for local inode).", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | (unsigned long long) ip->i_ino, |
| 387 | (long long) di_size); |
| 388 | XFS_CORRUPTION_ERROR("xfs_iformat(5)", |
| 389 | XFS_ERRLEVEL_LOW, |
| 390 | ip->i_mount, dip); |
| 391 | return XFS_ERROR(EFSCORRUPTED); |
| 392 | } |
| 393 | |
| 394 | size = (int)di_size; |
| 395 | error = xfs_iformat_local(ip, dip, XFS_DATA_FORK, size); |
| 396 | break; |
| 397 | case XFS_DINODE_FMT_EXTENTS: |
| 398 | error = xfs_iformat_extents(ip, dip, XFS_DATA_FORK); |
| 399 | break; |
| 400 | case XFS_DINODE_FMT_BTREE: |
| 401 | error = xfs_iformat_btree(ip, dip, XFS_DATA_FORK); |
| 402 | break; |
| 403 | default: |
| 404 | XFS_ERROR_REPORT("xfs_iformat(6)", XFS_ERRLEVEL_LOW, |
| 405 | ip->i_mount); |
| 406 | return XFS_ERROR(EFSCORRUPTED); |
| 407 | } |
| 408 | break; |
| 409 | |
| 410 | default: |
| 411 | XFS_ERROR_REPORT("xfs_iformat(7)", XFS_ERRLEVEL_LOW, ip->i_mount); |
| 412 | return XFS_ERROR(EFSCORRUPTED); |
| 413 | } |
| 414 | if (error) { |
| 415 | return error; |
| 416 | } |
| 417 | if (!XFS_DFORK_Q(dip)) |
| 418 | return 0; |
| 419 | ASSERT(ip->i_afp == NULL); |
Dave Chinner | 4a7eddd | 2010-07-20 17:53:59 +1000 | [diff] [blame] | 420 | ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP | KM_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | ip->i_afp->if_ext_max = |
| 422 | XFS_IFORK_ASIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t); |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 423 | switch (dip->di_aformat) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | case XFS_DINODE_FMT_LOCAL: |
| 425 | atp = (xfs_attr_shortform_t *)XFS_DFORK_APTR(dip); |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 426 | size = be16_to_cpu(atp->hdr.totsize); |
Christoph Hellwig | 2809f76 | 2009-01-19 02:04:16 +0100 | [diff] [blame] | 427 | |
| 428 | if (unlikely(size < sizeof(struct xfs_attr_sf_hdr))) { |
Dave Chinner | 65333b4 | 2011-03-07 10:03:35 +1100 | [diff] [blame] | 429 | xfs_warn(ip->i_mount, |
| 430 | "corrupt inode %Lu (bad attr fork size %Ld).", |
Christoph Hellwig | 2809f76 | 2009-01-19 02:04:16 +0100 | [diff] [blame] | 431 | (unsigned long long) ip->i_ino, |
| 432 | (long long) size); |
| 433 | XFS_CORRUPTION_ERROR("xfs_iformat(8)", |
| 434 | XFS_ERRLEVEL_LOW, |
| 435 | ip->i_mount, dip); |
| 436 | return XFS_ERROR(EFSCORRUPTED); |
| 437 | } |
| 438 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | error = xfs_iformat_local(ip, dip, XFS_ATTR_FORK, size); |
| 440 | break; |
| 441 | case XFS_DINODE_FMT_EXTENTS: |
| 442 | error = xfs_iformat_extents(ip, dip, XFS_ATTR_FORK); |
| 443 | break; |
| 444 | case XFS_DINODE_FMT_BTREE: |
| 445 | error = xfs_iformat_btree(ip, dip, XFS_ATTR_FORK); |
| 446 | break; |
| 447 | default: |
| 448 | error = XFS_ERROR(EFSCORRUPTED); |
| 449 | break; |
| 450 | } |
| 451 | if (error) { |
| 452 | kmem_zone_free(xfs_ifork_zone, ip->i_afp); |
| 453 | ip->i_afp = NULL; |
| 454 | xfs_idestroy_fork(ip, XFS_DATA_FORK); |
| 455 | } |
| 456 | return error; |
| 457 | } |
| 458 | |
| 459 | /* |
| 460 | * The file is in-lined in the on-disk inode. |
| 461 | * If it fits into if_inline_data, then copy |
| 462 | * it there, otherwise allocate a buffer for it |
| 463 | * and copy the data there. Either way, set |
| 464 | * if_data to point at the data. |
| 465 | * If we allocate a buffer for the data, make |
| 466 | * sure that its size is a multiple of 4 and |
| 467 | * record the real size in i_real_bytes. |
| 468 | */ |
| 469 | STATIC int |
| 470 | xfs_iformat_local( |
| 471 | xfs_inode_t *ip, |
| 472 | xfs_dinode_t *dip, |
| 473 | int whichfork, |
| 474 | int size) |
| 475 | { |
| 476 | xfs_ifork_t *ifp; |
| 477 | int real_size; |
| 478 | |
| 479 | /* |
| 480 | * If the size is unreasonable, then something |
| 481 | * is wrong and we just bail out rather than crash in |
| 482 | * kmem_alloc() or memcpy() below. |
| 483 | */ |
| 484 | if (unlikely(size > XFS_DFORK_SIZE(dip, ip->i_mount, whichfork))) { |
Dave Chinner | 65333b4 | 2011-03-07 10:03:35 +1100 | [diff] [blame] | 485 | xfs_warn(ip->i_mount, |
| 486 | "corrupt inode %Lu (bad size %d for local fork, size = %d).", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | (unsigned long long) ip->i_ino, size, |
| 488 | XFS_DFORK_SIZE(dip, ip->i_mount, whichfork)); |
| 489 | XFS_CORRUPTION_ERROR("xfs_iformat_local", XFS_ERRLEVEL_LOW, |
| 490 | ip->i_mount, dip); |
| 491 | return XFS_ERROR(EFSCORRUPTED); |
| 492 | } |
| 493 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 494 | real_size = 0; |
| 495 | if (size == 0) |
| 496 | ifp->if_u1.if_data = NULL; |
| 497 | else if (size <= sizeof(ifp->if_u2.if_inline_data)) |
| 498 | ifp->if_u1.if_data = ifp->if_u2.if_inline_data; |
| 499 | else { |
| 500 | real_size = roundup(size, 4); |
Dave Chinner | 4a7eddd | 2010-07-20 17:53:59 +1000 | [diff] [blame] | 501 | ifp->if_u1.if_data = kmem_alloc(real_size, KM_SLEEP | KM_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
| 503 | ifp->if_bytes = size; |
| 504 | ifp->if_real_bytes = real_size; |
| 505 | if (size) |
| 506 | memcpy(ifp->if_u1.if_data, XFS_DFORK_PTR(dip, whichfork), size); |
| 507 | ifp->if_flags &= ~XFS_IFEXTENTS; |
| 508 | ifp->if_flags |= XFS_IFINLINE; |
| 509 | return 0; |
| 510 | } |
| 511 | |
| 512 | /* |
| 513 | * The file consists of a set of extents all |
| 514 | * of which fit into the on-disk inode. |
| 515 | * If there are few enough extents to fit into |
| 516 | * the if_inline_ext, then copy them there. |
| 517 | * Otherwise allocate a buffer for them and copy |
| 518 | * them into it. Either way, set if_extents |
| 519 | * to point at the extents. |
| 520 | */ |
| 521 | STATIC int |
| 522 | xfs_iformat_extents( |
| 523 | xfs_inode_t *ip, |
| 524 | xfs_dinode_t *dip, |
| 525 | int whichfork) |
| 526 | { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 527 | xfs_bmbt_rec_t *dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | xfs_ifork_t *ifp; |
| 529 | int nex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | int size; |
| 531 | int i; |
| 532 | |
| 533 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 534 | nex = XFS_DFORK_NEXTENTS(dip, whichfork); |
| 535 | size = nex * (uint)sizeof(xfs_bmbt_rec_t); |
| 536 | |
| 537 | /* |
| 538 | * If the number of extents is unreasonable, then something |
| 539 | * is wrong and we just bail out rather than crash in |
| 540 | * kmem_alloc() or memcpy() below. |
| 541 | */ |
| 542 | if (unlikely(size < 0 || size > XFS_DFORK_SIZE(dip, ip->i_mount, whichfork))) { |
Dave Chinner | 65333b4 | 2011-03-07 10:03:35 +1100 | [diff] [blame] | 543 | xfs_warn(ip->i_mount, "corrupt inode %Lu ((a)extents = %d).", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | (unsigned long long) ip->i_ino, nex); |
| 545 | XFS_CORRUPTION_ERROR("xfs_iformat_extents(1)", XFS_ERRLEVEL_LOW, |
| 546 | ip->i_mount, dip); |
| 547 | return XFS_ERROR(EFSCORRUPTED); |
| 548 | } |
| 549 | |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 550 | ifp->if_real_bytes = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | if (nex == 0) |
| 552 | ifp->if_u1.if_extents = NULL; |
| 553 | else if (nex <= XFS_INLINE_EXTS) |
| 554 | ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext; |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 555 | else |
| 556 | xfs_iext_add(ifp, 0, nex); |
| 557 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | ifp->if_bytes = size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | if (size) { |
| 560 | dp = (xfs_bmbt_rec_t *) XFS_DFORK_PTR(dip, whichfork); |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 561 | xfs_validate_extents(ifp, nex, XFS_EXTFMT_INODE(ip)); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 562 | for (i = 0; i < nex; i++, dp++) { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 563 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, i); |
Harvey Harrison | 597bca6 | 2008-08-13 16:29:21 +1000 | [diff] [blame] | 564 | ep->l0 = get_unaligned_be64(&dp->l0); |
| 565 | ep->l1 = get_unaligned_be64(&dp->l1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | } |
Eric Sandeen | 3a59c94 | 2007-07-11 11:09:47 +1000 | [diff] [blame] | 567 | XFS_BMAP_TRACE_EXLIST(ip, nex, whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | if (whichfork != XFS_DATA_FORK || |
| 569 | XFS_EXTFMT_INODE(ip) == XFS_EXTFMT_NOSTATE) |
| 570 | if (unlikely(xfs_check_nostate_extents( |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 571 | ifp, 0, nex))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | XFS_ERROR_REPORT("xfs_iformat_extents(2)", |
| 573 | XFS_ERRLEVEL_LOW, |
| 574 | ip->i_mount); |
| 575 | return XFS_ERROR(EFSCORRUPTED); |
| 576 | } |
| 577 | } |
| 578 | ifp->if_flags |= XFS_IFEXTENTS; |
| 579 | return 0; |
| 580 | } |
| 581 | |
| 582 | /* |
| 583 | * The file has too many extents to fit into |
| 584 | * the inode, so they are in B-tree format. |
| 585 | * Allocate a buffer for the root of the B-tree |
| 586 | * and copy the root into it. The i_extents |
| 587 | * field will remain NULL until all of the |
| 588 | * extents are read in (when they are needed). |
| 589 | */ |
| 590 | STATIC int |
| 591 | xfs_iformat_btree( |
| 592 | xfs_inode_t *ip, |
| 593 | xfs_dinode_t *dip, |
| 594 | int whichfork) |
| 595 | { |
| 596 | xfs_bmdr_block_t *dfp; |
| 597 | xfs_ifork_t *ifp; |
| 598 | /* REFERENCED */ |
| 599 | int nrecs; |
| 600 | int size; |
| 601 | |
| 602 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 603 | dfp = (xfs_bmdr_block_t *)XFS_DFORK_PTR(dip, whichfork); |
| 604 | size = XFS_BMAP_BROOT_SPACE(dfp); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 605 | nrecs = be16_to_cpu(dfp->bb_numrecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | |
| 607 | /* |
| 608 | * blow out if -- fork has less extents than can fit in |
| 609 | * fork (fork shouldn't be a btree format), root btree |
| 610 | * block has more records than can fit into the fork, |
| 611 | * or the number of extents is greater than the number of |
| 612 | * blocks. |
| 613 | */ |
| 614 | if (unlikely(XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max |
| 615 | || XFS_BMDR_SPACE_CALC(nrecs) > |
| 616 | XFS_DFORK_SIZE(dip, ip->i_mount, whichfork) |
| 617 | || XFS_IFORK_NEXTENTS(ip, whichfork) > ip->i_d.di_nblocks)) { |
Dave Chinner | 65333b4 | 2011-03-07 10:03:35 +1100 | [diff] [blame] | 618 | xfs_warn(ip->i_mount, "corrupt inode %Lu (btree).", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | (unsigned long long) ip->i_ino); |
Dave Chinner | 65333b4 | 2011-03-07 10:03:35 +1100 | [diff] [blame] | 620 | XFS_CORRUPTION_ERROR("xfs_iformat_btree", XFS_ERRLEVEL_LOW, |
| 621 | ip->i_mount, dip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | return XFS_ERROR(EFSCORRUPTED); |
| 623 | } |
| 624 | |
| 625 | ifp->if_broot_bytes = size; |
Dave Chinner | 4a7eddd | 2010-07-20 17:53:59 +1000 | [diff] [blame] | 626 | ifp->if_broot = kmem_alloc(size, KM_SLEEP | KM_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | ASSERT(ifp->if_broot != NULL); |
| 628 | /* |
| 629 | * Copy and convert from the on-disk structure |
| 630 | * to the in-memory structure. |
| 631 | */ |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 632 | xfs_bmdr_to_bmbt(ip->i_mount, dfp, |
| 633 | XFS_DFORK_SIZE(dip, ip->i_mount, whichfork), |
| 634 | ifp->if_broot, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | ifp->if_flags &= ~XFS_IFEXTENTS; |
| 636 | ifp->if_flags |= XFS_IFBROOT; |
| 637 | |
| 638 | return 0; |
| 639 | } |
| 640 | |
Eric Sandeen | d96f8f8 | 2009-07-02 00:09:33 -0500 | [diff] [blame] | 641 | STATIC void |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 642 | xfs_dinode_from_disk( |
| 643 | xfs_icdinode_t *to, |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 644 | xfs_dinode_t *from) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | { |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 646 | to->di_magic = be16_to_cpu(from->di_magic); |
| 647 | to->di_mode = be16_to_cpu(from->di_mode); |
| 648 | to->di_version = from ->di_version; |
| 649 | to->di_format = from->di_format; |
| 650 | to->di_onlink = be16_to_cpu(from->di_onlink); |
| 651 | to->di_uid = be32_to_cpu(from->di_uid); |
| 652 | to->di_gid = be32_to_cpu(from->di_gid); |
| 653 | to->di_nlink = be32_to_cpu(from->di_nlink); |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 654 | to->di_projid_lo = be16_to_cpu(from->di_projid_lo); |
| 655 | to->di_projid_hi = be16_to_cpu(from->di_projid_hi); |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 656 | memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad)); |
| 657 | to->di_flushiter = be16_to_cpu(from->di_flushiter); |
| 658 | to->di_atime.t_sec = be32_to_cpu(from->di_atime.t_sec); |
| 659 | to->di_atime.t_nsec = be32_to_cpu(from->di_atime.t_nsec); |
| 660 | to->di_mtime.t_sec = be32_to_cpu(from->di_mtime.t_sec); |
| 661 | to->di_mtime.t_nsec = be32_to_cpu(from->di_mtime.t_nsec); |
| 662 | to->di_ctime.t_sec = be32_to_cpu(from->di_ctime.t_sec); |
| 663 | to->di_ctime.t_nsec = be32_to_cpu(from->di_ctime.t_nsec); |
| 664 | to->di_size = be64_to_cpu(from->di_size); |
| 665 | to->di_nblocks = be64_to_cpu(from->di_nblocks); |
| 666 | to->di_extsize = be32_to_cpu(from->di_extsize); |
| 667 | to->di_nextents = be32_to_cpu(from->di_nextents); |
| 668 | to->di_anextents = be16_to_cpu(from->di_anextents); |
| 669 | to->di_forkoff = from->di_forkoff; |
| 670 | to->di_aformat = from->di_aformat; |
| 671 | to->di_dmevmask = be32_to_cpu(from->di_dmevmask); |
| 672 | to->di_dmstate = be16_to_cpu(from->di_dmstate); |
| 673 | to->di_flags = be16_to_cpu(from->di_flags); |
| 674 | to->di_gen = be32_to_cpu(from->di_gen); |
| 675 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 677 | void |
| 678 | xfs_dinode_to_disk( |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 679 | xfs_dinode_t *to, |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 680 | xfs_icdinode_t *from) |
| 681 | { |
| 682 | to->di_magic = cpu_to_be16(from->di_magic); |
| 683 | to->di_mode = cpu_to_be16(from->di_mode); |
| 684 | to->di_version = from ->di_version; |
| 685 | to->di_format = from->di_format; |
| 686 | to->di_onlink = cpu_to_be16(from->di_onlink); |
| 687 | to->di_uid = cpu_to_be32(from->di_uid); |
| 688 | to->di_gid = cpu_to_be32(from->di_gid); |
| 689 | to->di_nlink = cpu_to_be32(from->di_nlink); |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 690 | to->di_projid_lo = cpu_to_be16(from->di_projid_lo); |
| 691 | to->di_projid_hi = cpu_to_be16(from->di_projid_hi); |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 692 | memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad)); |
| 693 | to->di_flushiter = cpu_to_be16(from->di_flushiter); |
| 694 | to->di_atime.t_sec = cpu_to_be32(from->di_atime.t_sec); |
| 695 | to->di_atime.t_nsec = cpu_to_be32(from->di_atime.t_nsec); |
| 696 | to->di_mtime.t_sec = cpu_to_be32(from->di_mtime.t_sec); |
| 697 | to->di_mtime.t_nsec = cpu_to_be32(from->di_mtime.t_nsec); |
| 698 | to->di_ctime.t_sec = cpu_to_be32(from->di_ctime.t_sec); |
| 699 | to->di_ctime.t_nsec = cpu_to_be32(from->di_ctime.t_nsec); |
| 700 | to->di_size = cpu_to_be64(from->di_size); |
| 701 | to->di_nblocks = cpu_to_be64(from->di_nblocks); |
| 702 | to->di_extsize = cpu_to_be32(from->di_extsize); |
| 703 | to->di_nextents = cpu_to_be32(from->di_nextents); |
| 704 | to->di_anextents = cpu_to_be16(from->di_anextents); |
| 705 | to->di_forkoff = from->di_forkoff; |
| 706 | to->di_aformat = from->di_aformat; |
| 707 | to->di_dmevmask = cpu_to_be32(from->di_dmevmask); |
| 708 | to->di_dmstate = cpu_to_be16(from->di_dmstate); |
| 709 | to->di_flags = cpu_to_be16(from->di_flags); |
| 710 | to->di_gen = cpu_to_be32(from->di_gen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | } |
| 712 | |
| 713 | STATIC uint |
| 714 | _xfs_dic2xflags( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | __uint16_t di_flags) |
| 716 | { |
| 717 | uint flags = 0; |
| 718 | |
| 719 | if (di_flags & XFS_DIFLAG_ANY) { |
| 720 | if (di_flags & XFS_DIFLAG_REALTIME) |
| 721 | flags |= XFS_XFLAG_REALTIME; |
| 722 | if (di_flags & XFS_DIFLAG_PREALLOC) |
| 723 | flags |= XFS_XFLAG_PREALLOC; |
| 724 | if (di_flags & XFS_DIFLAG_IMMUTABLE) |
| 725 | flags |= XFS_XFLAG_IMMUTABLE; |
| 726 | if (di_flags & XFS_DIFLAG_APPEND) |
| 727 | flags |= XFS_XFLAG_APPEND; |
| 728 | if (di_flags & XFS_DIFLAG_SYNC) |
| 729 | flags |= XFS_XFLAG_SYNC; |
| 730 | if (di_flags & XFS_DIFLAG_NOATIME) |
| 731 | flags |= XFS_XFLAG_NOATIME; |
| 732 | if (di_flags & XFS_DIFLAG_NODUMP) |
| 733 | flags |= XFS_XFLAG_NODUMP; |
| 734 | if (di_flags & XFS_DIFLAG_RTINHERIT) |
| 735 | flags |= XFS_XFLAG_RTINHERIT; |
| 736 | if (di_flags & XFS_DIFLAG_PROJINHERIT) |
| 737 | flags |= XFS_XFLAG_PROJINHERIT; |
| 738 | if (di_flags & XFS_DIFLAG_NOSYMLINKS) |
| 739 | flags |= XFS_XFLAG_NOSYMLINKS; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 740 | if (di_flags & XFS_DIFLAG_EXTSIZE) |
| 741 | flags |= XFS_XFLAG_EXTSIZE; |
| 742 | if (di_flags & XFS_DIFLAG_EXTSZINHERIT) |
| 743 | flags |= XFS_XFLAG_EXTSZINHERIT; |
Barry Naujok | d3446ea | 2006-06-09 14:54:19 +1000 | [diff] [blame] | 744 | if (di_flags & XFS_DIFLAG_NODEFRAG) |
| 745 | flags |= XFS_XFLAG_NODEFRAG; |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 746 | if (di_flags & XFS_DIFLAG_FILESTREAM) |
| 747 | flags |= XFS_XFLAG_FILESTREAM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | } |
| 749 | |
| 750 | return flags; |
| 751 | } |
| 752 | |
| 753 | uint |
| 754 | xfs_ip2xflags( |
| 755 | xfs_inode_t *ip) |
| 756 | { |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 757 | xfs_icdinode_t *dic = &ip->i_d; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | |
Nathan Scott | a916e2b | 2006-06-09 17:12:17 +1000 | [diff] [blame] | 759 | return _xfs_dic2xflags(dic->di_flags) | |
Christoph Hellwig | 45ba598 | 2007-12-07 14:07:20 +1100 | [diff] [blame] | 760 | (XFS_IFORK_Q(ip) ? XFS_XFLAG_HASATTR : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | } |
| 762 | |
| 763 | uint |
| 764 | xfs_dic2xflags( |
Christoph Hellwig | 45ba598 | 2007-12-07 14:07:20 +1100 | [diff] [blame] | 765 | xfs_dinode_t *dip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | { |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 767 | return _xfs_dic2xflags(be16_to_cpu(dip->di_flags)) | |
Christoph Hellwig | 45ba598 | 2007-12-07 14:07:20 +1100 | [diff] [blame] | 768 | (XFS_DFORK_Q(dip) ? XFS_XFLAG_HASATTR : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | } |
| 770 | |
| 771 | /* |
Christoph Hellwig | 24f211b | 2008-11-28 14:23:42 +1100 | [diff] [blame] | 772 | * Read the disk inode attributes into the in-core inode structure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | */ |
| 774 | int |
| 775 | xfs_iread( |
| 776 | xfs_mount_t *mp, |
| 777 | xfs_trans_t *tp, |
Christoph Hellwig | 24f211b | 2008-11-28 14:23:42 +1100 | [diff] [blame] | 778 | xfs_inode_t *ip, |
Christoph Hellwig | 24f211b | 2008-11-28 14:23:42 +1100 | [diff] [blame] | 779 | uint iget_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | { |
| 781 | xfs_buf_t *bp; |
| 782 | xfs_dinode_t *dip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | int error; |
| 784 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | /* |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 786 | * Fill in the location information in the in-core inode. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | */ |
Christoph Hellwig | 24f211b | 2008-11-28 14:23:42 +1100 | [diff] [blame] | 788 | error = xfs_imap(mp, tp, ip->i_ino, &ip->i_imap, iget_flags); |
Christoph Hellwig | 9ed0451 | 2008-10-30 18:26:04 +1100 | [diff] [blame] | 789 | if (error) |
Christoph Hellwig | 24f211b | 2008-11-28 14:23:42 +1100 | [diff] [blame] | 790 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | |
| 792 | /* |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 793 | * Get pointers to the on-disk inode and the buffer containing it. |
Christoph Hellwig | 76d8b27 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 794 | */ |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 795 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &bp, |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 796 | XBF_LOCK, iget_flags); |
Christoph Hellwig | 76d8b27 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 797 | if (error) |
Christoph Hellwig | 24f211b | 2008-11-28 14:23:42 +1100 | [diff] [blame] | 798 | return error; |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 799 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, ip->i_imap.im_boffset); |
Christoph Hellwig | 76d8b27 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 800 | |
| 801 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | * If we got something that isn't an inode it means someone |
| 803 | * (nfs or dmi) has a stale handle. |
| 804 | */ |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 805 | if (be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | #ifdef DEBUG |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 807 | xfs_alert(mp, |
| 808 | "%s: dip->di_magic (0x%x) != XFS_DINODE_MAGIC (0x%x)", |
| 809 | __func__, be16_to_cpu(dip->di_magic), XFS_DINODE_MAGIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | #endif /* DEBUG */ |
Christoph Hellwig | 9ed0451 | 2008-10-30 18:26:04 +1100 | [diff] [blame] | 811 | error = XFS_ERROR(EINVAL); |
| 812 | goto out_brelse; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | } |
| 814 | |
| 815 | /* |
| 816 | * If the on-disk inode is already linked to a directory |
| 817 | * entry, copy all of the inode into the in-core inode. |
| 818 | * xfs_iformat() handles copying in the inode format |
| 819 | * specific information. |
| 820 | * Otherwise, just get the truly permanent information. |
| 821 | */ |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 822 | if (dip->di_mode) { |
| 823 | xfs_dinode_from_disk(&ip->i_d, dip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | error = xfs_iformat(ip, dip); |
| 825 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | #ifdef DEBUG |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 827 | xfs_alert(mp, "%s: xfs_iformat() returned error %d", |
| 828 | __func__, error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | #endif /* DEBUG */ |
Christoph Hellwig | 9ed0451 | 2008-10-30 18:26:04 +1100 | [diff] [blame] | 830 | goto out_brelse; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | } |
| 832 | } else { |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 833 | ip->i_d.di_magic = be16_to_cpu(dip->di_magic); |
| 834 | ip->i_d.di_version = dip->di_version; |
| 835 | ip->i_d.di_gen = be32_to_cpu(dip->di_gen); |
| 836 | ip->i_d.di_flushiter = be16_to_cpu(dip->di_flushiter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | /* |
| 838 | * Make sure to pull in the mode here as well in |
| 839 | * case the inode is released without being used. |
| 840 | * This ensures that xfs_inactive() will see that |
| 841 | * the inode is already free and not try to mess |
| 842 | * with the uninitialized part of it. |
| 843 | */ |
| 844 | ip->i_d.di_mode = 0; |
| 845 | /* |
| 846 | * Initialize the per-fork minima and maxima for a new |
| 847 | * inode here. xfs_iformat will do it for old inodes. |
| 848 | */ |
| 849 | ip->i_df.if_ext_max = |
| 850 | XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t); |
| 851 | } |
| 852 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | /* |
| 854 | * The inode format changed when we moved the link count and |
| 855 | * made it 32 bits long. If this is an old format inode, |
| 856 | * convert it in memory to look like a new one. If it gets |
| 857 | * flushed to disk we will convert back before flushing or |
| 858 | * logging it. We zero out the new projid field and the old link |
| 859 | * count field. We'll handle clearing the pad field (the remains |
| 860 | * of the old uuid field) when we actually convert the inode to |
| 861 | * the new format. We don't change the version number so that we |
| 862 | * can distinguish this from a real new format inode. |
| 863 | */ |
Christoph Hellwig | 51ce16d | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 864 | if (ip->i_d.di_version == 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | ip->i_d.di_nlink = ip->i_d.di_onlink; |
| 866 | ip->i_d.di_onlink = 0; |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 867 | xfs_set_projid(ip, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | } |
| 869 | |
| 870 | ip->i_delayed_blks = 0; |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 871 | ip->i_size = ip->i_d.di_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
| 873 | /* |
| 874 | * Mark the buffer containing the inode as something to keep |
| 875 | * around for a while. This helps to keep recently accessed |
| 876 | * meta-data in-core longer. |
| 877 | */ |
Dave Chinner | 821eb21 | 2010-12-02 16:31:13 +1100 | [diff] [blame] | 878 | xfs_buf_set_ref(bp, XFS_INO_REF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | |
| 880 | /* |
| 881 | * Use xfs_trans_brelse() to release the buffer containing the |
| 882 | * on-disk inode, because it was acquired with xfs_trans_read_buf() |
| 883 | * in xfs_itobp() above. If tp is NULL, this is just a normal |
| 884 | * brelse(). If we're within a transaction, then xfs_trans_brelse() |
| 885 | * will only release the buffer if it is not dirty within the |
| 886 | * transaction. It will be OK to release the buffer in this case, |
| 887 | * because inodes on disk are never destroyed and we will be |
| 888 | * locking the new in-core inode before putting it in the hash |
| 889 | * table where other processes can find it. Thus we don't have |
| 890 | * to worry about the inode being changed just because we released |
| 891 | * the buffer. |
| 892 | */ |
Christoph Hellwig | 9ed0451 | 2008-10-30 18:26:04 +1100 | [diff] [blame] | 893 | out_brelse: |
| 894 | xfs_trans_brelse(tp, bp); |
Christoph Hellwig | 9ed0451 | 2008-10-30 18:26:04 +1100 | [diff] [blame] | 895 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | } |
| 897 | |
| 898 | /* |
| 899 | * Read in extents from a btree-format inode. |
| 900 | * Allocate and fill in if_extents. Real work is done in xfs_bmap.c. |
| 901 | */ |
| 902 | int |
| 903 | xfs_iread_extents( |
| 904 | xfs_trans_t *tp, |
| 905 | xfs_inode_t *ip, |
| 906 | int whichfork) |
| 907 | { |
| 908 | int error; |
| 909 | xfs_ifork_t *ifp; |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 910 | xfs_extnum_t nextents; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | |
| 912 | if (unlikely(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) { |
| 913 | XFS_ERROR_REPORT("xfs_iread_extents", XFS_ERRLEVEL_LOW, |
| 914 | ip->i_mount); |
| 915 | return XFS_ERROR(EFSCORRUPTED); |
| 916 | } |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 917 | nextents = XFS_IFORK_NEXTENTS(ip, whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | ifp = XFS_IFORK_PTR(ip, whichfork); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 919 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | /* |
| 921 | * We know that the size is valid (it's checked in iformat_btree) |
| 922 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | ifp->if_lastex = NULLEXTNUM; |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 924 | ifp->if_bytes = ifp->if_real_bytes = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | ifp->if_flags |= XFS_IFEXTENTS; |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 926 | xfs_iext_add(ifp, 0, nextents); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | error = xfs_bmap_read_extents(tp, ip, whichfork); |
| 928 | if (error) { |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 929 | xfs_iext_destroy(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | ifp->if_flags &= ~XFS_IFEXTENTS; |
| 931 | return error; |
| 932 | } |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 933 | xfs_validate_extents(ifp, nextents, XFS_EXTFMT_INODE(ip)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | return 0; |
| 935 | } |
| 936 | |
| 937 | /* |
| 938 | * Allocate an inode on disk and return a copy of its in-core version. |
| 939 | * The in-core inode is locked exclusively. Set mode, nlink, and rdev |
| 940 | * appropriately within the inode. The uid and gid for the inode are |
| 941 | * set according to the contents of the given cred structure. |
| 942 | * |
| 943 | * Use xfs_dialloc() to allocate the on-disk inode. If xfs_dialloc() |
| 944 | * has a free inode available, call xfs_iget() |
| 945 | * to obtain the in-core version of the allocated inode. Finally, |
| 946 | * fill in the inode and log its initial contents. In this case, |
| 947 | * ialloc_context would be set to NULL and call_again set to false. |
| 948 | * |
| 949 | * If xfs_dialloc() does not have an available inode, |
| 950 | * it will replenish its supply by doing an allocation. Since we can |
| 951 | * only do one allocation within a transaction without deadlocks, we |
| 952 | * must commit the current transaction before returning the inode itself. |
| 953 | * In this case, therefore, we will set call_again to true and return. |
| 954 | * The caller should then commit the current transaction, start a new |
| 955 | * transaction, and call xfs_ialloc() again to actually get the inode. |
| 956 | * |
| 957 | * To ensure that some other process does not grab the inode that |
| 958 | * was allocated during the first call to xfs_ialloc(), this routine |
| 959 | * also returns the [locked] bp pointing to the head of the freelist |
| 960 | * as ialloc_context. The caller should hold this buffer across |
| 961 | * the commit and pass it back into this routine on the second call. |
David Chinner | b11f94d | 2007-07-11 11:09:33 +1000 | [diff] [blame] | 962 | * |
| 963 | * If we are allocating quota inodes, we do not have a parent inode |
| 964 | * to attach to or associate with (i.e. pip == NULL) because they |
| 965 | * are not linked into the directory structure - they are attached |
| 966 | * directly to the superblock - and so have no parent. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | */ |
| 968 | int |
| 969 | xfs_ialloc( |
| 970 | xfs_trans_t *tp, |
| 971 | xfs_inode_t *pip, |
| 972 | mode_t mode, |
Nathan Scott | 31b084a | 2005-05-05 13:25:00 -0700 | [diff] [blame] | 973 | xfs_nlink_t nlink, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | xfs_dev_t rdev, |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 975 | prid_t prid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | int okalloc, |
| 977 | xfs_buf_t **ialloc_context, |
| 978 | boolean_t *call_again, |
| 979 | xfs_inode_t **ipp) |
| 980 | { |
| 981 | xfs_ino_t ino; |
| 982 | xfs_inode_t *ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | uint flags; |
| 984 | int error; |
Christoph Hellwig | dff35fd | 2008-08-13 16:44:15 +1000 | [diff] [blame] | 985 | timespec_t tv; |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 986 | int filestreams = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | |
| 988 | /* |
| 989 | * Call the space management code to pick |
| 990 | * the on-disk inode to be allocated. |
| 991 | */ |
David Chinner | b11f94d | 2007-07-11 11:09:33 +1000 | [diff] [blame] | 992 | error = xfs_dialloc(tp, pip ? pip->i_ino : 0, mode, okalloc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | ialloc_context, call_again, &ino); |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 994 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | if (*call_again || ino == NULLFSINO) { |
| 997 | *ipp = NULL; |
| 998 | return 0; |
| 999 | } |
| 1000 | ASSERT(*ialloc_context == NULL); |
| 1001 | |
| 1002 | /* |
| 1003 | * Get the in-core inode with the lock held exclusively. |
| 1004 | * This is because we're setting fields here we need |
| 1005 | * to prevent others from looking at until we're done. |
| 1006 | */ |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 1007 | error = xfs_iget(tp->t_mountp, tp, ino, XFS_IGET_CREATE, |
| 1008 | XFS_ILOCK_EXCL, &ip); |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 1009 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | ASSERT(ip != NULL); |
| 1012 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | ip->i_d.di_mode = (__uint16_t)mode; |
| 1014 | ip->i_d.di_onlink = 0; |
| 1015 | ip->i_d.di_nlink = nlink; |
| 1016 | ASSERT(ip->i_d.di_nlink == nlink); |
David Howells | 9e2b2dc | 2008-08-13 16:20:04 +0100 | [diff] [blame] | 1017 | ip->i_d.di_uid = current_fsuid(); |
| 1018 | ip->i_d.di_gid = current_fsgid(); |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 1019 | xfs_set_projid(ip, prid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad)); |
| 1021 | |
| 1022 | /* |
| 1023 | * If the superblock version is up to where we support new format |
| 1024 | * inodes and this is currently an old format inode, then change |
| 1025 | * the inode version number now. This way we only do the conversion |
| 1026 | * here rather than here and in the flush/logging code. |
| 1027 | */ |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 1028 | if (xfs_sb_version_hasnlink(&tp->t_mountp->m_sb) && |
Christoph Hellwig | 51ce16d | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 1029 | ip->i_d.di_version == 1) { |
| 1030 | ip->i_d.di_version = 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | /* |
| 1032 | * We've already zeroed the old link count, the projid field, |
| 1033 | * and the pad field. |
| 1034 | */ |
| 1035 | } |
| 1036 | |
| 1037 | /* |
| 1038 | * Project ids won't be stored on disk if we are using a version 1 inode. |
| 1039 | */ |
Christoph Hellwig | 51ce16d | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 1040 | if ((prid != 0) && (ip->i_d.di_version == 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | xfs_bump_ino_vers2(tp, ip); |
| 1042 | |
Christoph Hellwig | bd186aa | 2007-08-30 17:21:12 +1000 | [diff] [blame] | 1043 | if (pip && XFS_INHERIT_GID(pip)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | ip->i_d.di_gid = pip->i_d.di_gid; |
| 1045 | if ((pip->i_d.di_mode & S_ISGID) && (mode & S_IFMT) == S_IFDIR) { |
| 1046 | ip->i_d.di_mode |= S_ISGID; |
| 1047 | } |
| 1048 | } |
| 1049 | |
| 1050 | /* |
| 1051 | * If the group ID of the new file does not match the effective group |
| 1052 | * ID or one of the supplementary group IDs, the S_ISGID bit is cleared |
| 1053 | * (and only if the irix_sgid_inherit compatibility variable is set). |
| 1054 | */ |
| 1055 | if ((irix_sgid_inherit) && |
| 1056 | (ip->i_d.di_mode & S_ISGID) && |
| 1057 | (!in_group_p((gid_t)ip->i_d.di_gid))) { |
| 1058 | ip->i_d.di_mode &= ~S_ISGID; |
| 1059 | } |
| 1060 | |
| 1061 | ip->i_d.di_size = 0; |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1062 | ip->i_size = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | ip->i_d.di_nextents = 0; |
| 1064 | ASSERT(ip->i_d.di_nblocks == 0); |
Christoph Hellwig | dff35fd | 2008-08-13 16:44:15 +1000 | [diff] [blame] | 1065 | |
| 1066 | nanotime(&tv); |
| 1067 | ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; |
| 1068 | ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; |
| 1069 | ip->i_d.di_atime = ip->i_d.di_mtime; |
| 1070 | ip->i_d.di_ctime = ip->i_d.di_mtime; |
| 1071 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | /* |
| 1073 | * di_gen will have been taken care of in xfs_iread. |
| 1074 | */ |
| 1075 | ip->i_d.di_extsize = 0; |
| 1076 | ip->i_d.di_dmevmask = 0; |
| 1077 | ip->i_d.di_dmstate = 0; |
| 1078 | ip->i_d.di_flags = 0; |
| 1079 | flags = XFS_ILOG_CORE; |
| 1080 | switch (mode & S_IFMT) { |
| 1081 | case S_IFIFO: |
| 1082 | case S_IFCHR: |
| 1083 | case S_IFBLK: |
| 1084 | case S_IFSOCK: |
| 1085 | ip->i_d.di_format = XFS_DINODE_FMT_DEV; |
| 1086 | ip->i_df.if_u2.if_rdev = rdev; |
| 1087 | ip->i_df.if_flags = 0; |
| 1088 | flags |= XFS_ILOG_DEV; |
| 1089 | break; |
| 1090 | case S_IFREG: |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 1091 | /* |
| 1092 | * we can't set up filestreams until after the VFS inode |
| 1093 | * is set up properly. |
| 1094 | */ |
| 1095 | if (pip && xfs_inode_is_filestream(pip)) |
| 1096 | filestreams = 1; |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 1097 | /* fall through */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | case S_IFDIR: |
David Chinner | b11f94d | 2007-07-11 11:09:33 +1000 | [diff] [blame] | 1099 | if (pip && (pip->i_d.di_flags & XFS_DIFLAG_ANY)) { |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1100 | uint di_flags = 0; |
| 1101 | |
| 1102 | if ((mode & S_IFMT) == S_IFDIR) { |
| 1103 | if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) |
| 1104 | di_flags |= XFS_DIFLAG_RTINHERIT; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1105 | if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) { |
| 1106 | di_flags |= XFS_DIFLAG_EXTSZINHERIT; |
| 1107 | ip->i_d.di_extsize = pip->i_d.di_extsize; |
| 1108 | } |
| 1109 | } else if ((mode & S_IFMT) == S_IFREG) { |
Christoph Hellwig | 613d704 | 2007-10-11 17:44:08 +1000 | [diff] [blame] | 1110 | if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1111 | di_flags |= XFS_DIFLAG_REALTIME; |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 1112 | if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) { |
| 1113 | di_flags |= XFS_DIFLAG_EXTSIZE; |
| 1114 | ip->i_d.di_extsize = pip->i_d.di_extsize; |
| 1115 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | } |
| 1117 | if ((pip->i_d.di_flags & XFS_DIFLAG_NOATIME) && |
| 1118 | xfs_inherit_noatime) |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1119 | di_flags |= XFS_DIFLAG_NOATIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | if ((pip->i_d.di_flags & XFS_DIFLAG_NODUMP) && |
| 1121 | xfs_inherit_nodump) |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1122 | di_flags |= XFS_DIFLAG_NODUMP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | if ((pip->i_d.di_flags & XFS_DIFLAG_SYNC) && |
| 1124 | xfs_inherit_sync) |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1125 | di_flags |= XFS_DIFLAG_SYNC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | if ((pip->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) && |
| 1127 | xfs_inherit_nosymlinks) |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1128 | di_flags |= XFS_DIFLAG_NOSYMLINKS; |
| 1129 | if (pip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
| 1130 | di_flags |= XFS_DIFLAG_PROJINHERIT; |
Barry Naujok | d3446ea | 2006-06-09 14:54:19 +1000 | [diff] [blame] | 1131 | if ((pip->i_d.di_flags & XFS_DIFLAG_NODEFRAG) && |
| 1132 | xfs_inherit_nodefrag) |
| 1133 | di_flags |= XFS_DIFLAG_NODEFRAG; |
David Chinner | 2a82b8b | 2007-07-11 11:09:12 +1000 | [diff] [blame] | 1134 | if (pip->i_d.di_flags & XFS_DIFLAG_FILESTREAM) |
| 1135 | di_flags |= XFS_DIFLAG_FILESTREAM; |
Nathan Scott | 365ca83 | 2005-06-21 15:39:12 +1000 | [diff] [blame] | 1136 | ip->i_d.di_flags |= di_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | } |
| 1138 | /* FALLTHROUGH */ |
| 1139 | case S_IFLNK: |
| 1140 | ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS; |
| 1141 | ip->i_df.if_flags = XFS_IFEXTENTS; |
| 1142 | ip->i_df.if_bytes = ip->i_df.if_real_bytes = 0; |
| 1143 | ip->i_df.if_u1.if_extents = NULL; |
| 1144 | break; |
| 1145 | default: |
| 1146 | ASSERT(0); |
| 1147 | } |
| 1148 | /* |
| 1149 | * Attribute fork settings for new inode. |
| 1150 | */ |
| 1151 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; |
| 1152 | ip->i_d.di_anextents = 0; |
| 1153 | |
| 1154 | /* |
| 1155 | * Log the new values stuffed into the inode. |
| 1156 | */ |
Christoph Hellwig | ec3ba85 | 2011-02-13 13:26:42 +0000 | [diff] [blame] | 1157 | xfs_trans_ijoin_ref(tp, ip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | xfs_trans_log_inode(tp, ip, flags); |
| 1159 | |
Nathan Scott | b83bd13 | 2006-06-09 16:48:30 +1000 | [diff] [blame] | 1160 | /* now that we have an i_mode we can setup inode ops and unlock */ |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1161 | xfs_setup_inode(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 1163 | /* now we have set up the vfs inode we can associate the filestream */ |
| 1164 | if (filestreams) { |
| 1165 | error = xfs_filestream_associate(pip, ip); |
| 1166 | if (error < 0) |
| 1167 | return -error; |
| 1168 | if (!error) |
| 1169 | xfs_iflags_set(ip, XFS_IFILESTREAM); |
| 1170 | } |
| 1171 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | *ipp = ip; |
| 1173 | return 0; |
| 1174 | } |
| 1175 | |
| 1176 | /* |
| 1177 | * Check to make sure that there are no blocks allocated to the |
| 1178 | * file beyond the size of the file. We don't check this for |
| 1179 | * files with fixed size extents or real time extents, but we |
| 1180 | * at least do it for regular files. |
| 1181 | */ |
| 1182 | #ifdef DEBUG |
| 1183 | void |
| 1184 | xfs_isize_check( |
| 1185 | xfs_mount_t *mp, |
| 1186 | xfs_inode_t *ip, |
| 1187 | xfs_fsize_t isize) |
| 1188 | { |
| 1189 | xfs_fileoff_t map_first; |
| 1190 | int nimaps; |
| 1191 | xfs_bmbt_irec_t imaps[2]; |
| 1192 | |
| 1193 | if ((ip->i_d.di_mode & S_IFMT) != S_IFREG) |
| 1194 | return; |
| 1195 | |
Eric Sandeen | 71ddabb | 2007-11-23 16:29:42 +1100 | [diff] [blame] | 1196 | if (XFS_IS_REALTIME_INODE(ip)) |
| 1197 | return; |
| 1198 | |
| 1199 | if (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | return; |
| 1201 | |
| 1202 | nimaps = 2; |
| 1203 | map_first = XFS_B_TO_FSB(mp, (xfs_ufsize_t)isize); |
| 1204 | /* |
| 1205 | * The filesystem could be shutting down, so bmapi may return |
| 1206 | * an error. |
| 1207 | */ |
| 1208 | if (xfs_bmapi(NULL, ip, map_first, |
| 1209 | (XFS_B_TO_FSB(mp, |
| 1210 | (xfs_ufsize_t)XFS_MAXIOFFSET(mp)) - |
| 1211 | map_first), |
| 1212 | XFS_BMAPI_ENTIRE, NULL, 0, imaps, &nimaps, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1213 | NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | return; |
| 1215 | ASSERT(nimaps == 1); |
| 1216 | ASSERT(imaps[0].br_startblock == HOLESTARTBLOCK); |
| 1217 | } |
| 1218 | #endif /* DEBUG */ |
| 1219 | |
| 1220 | /* |
| 1221 | * Calculate the last possible buffered byte in a file. This must |
| 1222 | * include data that was buffered beyond the EOF by the write code. |
| 1223 | * This also needs to deal with overflowing the xfs_fsize_t type |
| 1224 | * which can happen for sizes near the limit. |
| 1225 | * |
| 1226 | * We also need to take into account any blocks beyond the EOF. It |
| 1227 | * may be the case that they were buffered by a write which failed. |
| 1228 | * In that case the pages will still be in memory, but the inode size |
| 1229 | * will never have been updated. |
| 1230 | */ |
Eric Sandeen | d96f8f8 | 2009-07-02 00:09:33 -0500 | [diff] [blame] | 1231 | STATIC xfs_fsize_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | xfs_file_last_byte( |
| 1233 | xfs_inode_t *ip) |
| 1234 | { |
| 1235 | xfs_mount_t *mp; |
| 1236 | xfs_fsize_t last_byte; |
| 1237 | xfs_fileoff_t last_block; |
| 1238 | xfs_fileoff_t size_last_block; |
| 1239 | int error; |
| 1240 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 1241 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | |
| 1243 | mp = ip->i_mount; |
| 1244 | /* |
| 1245 | * Only check for blocks beyond the EOF if the extents have |
| 1246 | * been read in. This eliminates the need for the inode lock, |
| 1247 | * and it also saves us from looking when it really isn't |
| 1248 | * necessary. |
| 1249 | */ |
| 1250 | if (ip->i_df.if_flags & XFS_IFEXTENTS) { |
Lachlan McIlroy | f25181f | 2009-04-23 22:18:00 -0400 | [diff] [blame] | 1251 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | error = xfs_bmap_last_offset(NULL, ip, &last_block, |
| 1253 | XFS_DATA_FORK); |
Lachlan McIlroy | f25181f | 2009-04-23 22:18:00 -0400 | [diff] [blame] | 1254 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | if (error) { |
| 1256 | last_block = 0; |
| 1257 | } |
| 1258 | } else { |
| 1259 | last_block = 0; |
| 1260 | } |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1261 | size_last_block = XFS_B_TO_FSB(mp, (xfs_ufsize_t)ip->i_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | last_block = XFS_FILEOFF_MAX(last_block, size_last_block); |
| 1263 | |
| 1264 | last_byte = XFS_FSB_TO_B(mp, last_block); |
| 1265 | if (last_byte < 0) { |
| 1266 | return XFS_MAXIOFFSET(mp); |
| 1267 | } |
| 1268 | last_byte += (1 << mp->m_writeio_log); |
| 1269 | if (last_byte < 0) { |
| 1270 | return XFS_MAXIOFFSET(mp); |
| 1271 | } |
| 1272 | return last_byte; |
| 1273 | } |
| 1274 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | /* |
| 1276 | * Start the truncation of the file to new_size. The new size |
| 1277 | * must be smaller than the current size. This routine will |
| 1278 | * clear the buffer and page caches of file data in the removed |
| 1279 | * range, and xfs_itruncate_finish() will remove the underlying |
| 1280 | * disk blocks. |
| 1281 | * |
| 1282 | * The inode must have its I/O lock locked EXCLUSIVELY, and it |
| 1283 | * must NOT have the inode lock held at all. This is because we're |
| 1284 | * calling into the buffer/page cache code and we can't hold the |
| 1285 | * inode lock when we do so. |
| 1286 | * |
David Chinner | 38e2299 | 2006-03-22 12:47:15 +1100 | [diff] [blame] | 1287 | * We need to wait for any direct I/Os in flight to complete before we |
| 1288 | * proceed with the truncate. This is needed to prevent the extents |
| 1289 | * being read or written by the direct I/Os from being removed while the |
| 1290 | * I/O is in flight as there is no other method of synchronising |
| 1291 | * direct I/O with the truncate operation. Also, because we hold |
| 1292 | * the IOLOCK in exclusive mode, we prevent new direct I/Os from being |
| 1293 | * started until the truncate completes and drops the lock. Essentially, |
Christoph Hellwig | 25e41b3 | 2008-12-03 12:20:39 +0100 | [diff] [blame] | 1294 | * the xfs_ioend_wait() call forms an I/O barrier that provides strict |
| 1295 | * ordering between direct I/Os and the truncate operation. |
David Chinner | 38e2299 | 2006-03-22 12:47:15 +1100 | [diff] [blame] | 1296 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | * The flags parameter can have either the value XFS_ITRUNC_DEFINITE |
| 1298 | * or XFS_ITRUNC_MAYBE. The XFS_ITRUNC_MAYBE value should be used |
| 1299 | * in the case that the caller is locking things out of order and |
| 1300 | * may not be able to call xfs_itruncate_finish() with the inode lock |
| 1301 | * held without dropping the I/O lock. If the caller must drop the |
| 1302 | * I/O lock before calling xfs_itruncate_finish(), then xfs_itruncate_start() |
| 1303 | * must be called again with all the same restrictions as the initial |
| 1304 | * call. |
| 1305 | */ |
Lachlan McIlroy | d3cf209 | 2007-05-08 13:49:27 +1000 | [diff] [blame] | 1306 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | xfs_itruncate_start( |
| 1308 | xfs_inode_t *ip, |
| 1309 | uint flags, |
| 1310 | xfs_fsize_t new_size) |
| 1311 | { |
| 1312 | xfs_fsize_t last_byte; |
| 1313 | xfs_off_t toss_start; |
| 1314 | xfs_mount_t *mp; |
Lachlan McIlroy | d3cf209 | 2007-05-08 13:49:27 +1000 | [diff] [blame] | 1315 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 1317 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1318 | ASSERT((new_size == 0) || (new_size <= ip->i_size)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | ASSERT((flags == XFS_ITRUNC_DEFINITE) || |
| 1320 | (flags == XFS_ITRUNC_MAYBE)); |
| 1321 | |
| 1322 | mp = ip->i_mount; |
Yingping Lu | 9fa8046 | 2006-03-22 12:44:35 +1100 | [diff] [blame] | 1323 | |
Lachlan McIlroy | c734c79 | 2007-12-18 16:17:41 +1100 | [diff] [blame] | 1324 | /* wait for the completion of any pending DIOs */ |
Lachlan McIlroy | d112f29 | 2008-10-30 16:59:06 +1100 | [diff] [blame] | 1325 | if (new_size == 0 || new_size < ip->i_size) |
Christoph Hellwig | 25e41b3 | 2008-12-03 12:20:39 +0100 | [diff] [blame] | 1326 | xfs_ioend_wait(ip); |
Lachlan McIlroy | c734c79 | 2007-12-18 16:17:41 +1100 | [diff] [blame] | 1327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | /* |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 1329 | * Call toss_pages or flushinval_pages to get rid of pages |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | * overlapping the region being removed. We have to use |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 1331 | * the less efficient flushinval_pages in the case that the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | * caller may not be able to finish the truncate without |
| 1333 | * dropping the inode's I/O lock. Make sure |
| 1334 | * to catch any pages brought in by buffers overlapping |
| 1335 | * the EOF by searching out beyond the isize by our |
| 1336 | * block size. We round new_size up to a block boundary |
| 1337 | * so that we don't toss things on the same block as |
| 1338 | * new_size but before it. |
| 1339 | * |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 1340 | * Before calling toss_page or flushinval_pages, make sure to |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | * call remapf() over the same region if the file is mapped. |
| 1342 | * This frees up mapped file references to the pages in the |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 1343 | * given range and for the flushinval_pages case it ensures |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | * that we get the latest mapped changes flushed out. |
| 1345 | */ |
| 1346 | toss_start = XFS_B_TO_FSB(mp, (xfs_ufsize_t)new_size); |
| 1347 | toss_start = XFS_FSB_TO_B(mp, toss_start); |
| 1348 | if (toss_start < 0) { |
| 1349 | /* |
| 1350 | * The place to start tossing is beyond our maximum |
| 1351 | * file size, so there is no way that the data extended |
| 1352 | * out there. |
| 1353 | */ |
Lachlan McIlroy | d3cf209 | 2007-05-08 13:49:27 +1000 | [diff] [blame] | 1354 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | } |
| 1356 | last_byte = xfs_file_last_byte(ip); |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1357 | trace_xfs_itruncate_start(ip, flags, new_size, toss_start, last_byte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | if (last_byte > toss_start) { |
| 1359 | if (flags & XFS_ITRUNC_DEFINITE) { |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 1360 | xfs_tosspages(ip, toss_start, |
| 1361 | -1, FI_REMAPF_LOCKED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | } else { |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 1363 | error = xfs_flushinval_pages(ip, toss_start, |
| 1364 | -1, FI_REMAPF_LOCKED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | } |
| 1366 | } |
| 1367 | |
| 1368 | #ifdef DEBUG |
| 1369 | if (new_size == 0) { |
Christoph Hellwig | df80c93 | 2008-08-13 16:22:09 +1000 | [diff] [blame] | 1370 | ASSERT(VN_CACHED(VFS_I(ip)) == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | } |
| 1372 | #endif |
Lachlan McIlroy | d3cf209 | 2007-05-08 13:49:27 +1000 | [diff] [blame] | 1373 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | } |
| 1375 | |
| 1376 | /* |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1377 | * Shrink the file to the given new_size. The new size must be smaller than |
| 1378 | * the current size. This will free up the underlying blocks in the removed |
| 1379 | * range after a call to xfs_itruncate_start() or xfs_atruncate_start(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | * |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1381 | * The transaction passed to this routine must have made a permanent log |
| 1382 | * reservation of at least XFS_ITRUNCATE_LOG_RES. This routine may commit the |
| 1383 | * given transaction and start new ones, so make sure everything involved in |
| 1384 | * the transaction is tidy before calling here. Some transaction will be |
| 1385 | * returned to the caller to be committed. The incoming transaction must |
| 1386 | * already include the inode, and both inode locks must be held exclusively. |
| 1387 | * The inode must also be "held" within the transaction. On return the inode |
| 1388 | * will be "held" within the returned transaction. This routine does NOT |
| 1389 | * require any disk space to be reserved for it within the transaction. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | * |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1391 | * The fork parameter must be either xfs_attr_fork or xfs_data_fork, and it |
| 1392 | * indicates the fork which is to be truncated. For the attribute fork we only |
| 1393 | * support truncation to size 0. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | * |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1395 | * We use the sync parameter to indicate whether or not the first transaction |
| 1396 | * we perform might have to be synchronous. For the attr fork, it needs to be |
| 1397 | * so if the unlink of the inode is not yet known to be permanent in the log. |
| 1398 | * This keeps us from freeing and reusing the blocks of the attribute fork |
| 1399 | * before the unlink of the inode becomes permanent. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | * |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1401 | * For the data fork, we normally have to run synchronously if we're being |
| 1402 | * called out of the inactive path or we're being called out of the create path |
| 1403 | * where we're truncating an existing file. Either way, the truncate needs to |
| 1404 | * be sync so blocks don't reappear in the file with altered data in case of a |
| 1405 | * crash. wsync filesystems can run the first case async because anything that |
| 1406 | * shrinks the inode has to run sync so by the time we're called here from |
| 1407 | * inactive, the inode size is permanently set to 0. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | * |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1409 | * Calls from the truncate path always need to be sync unless we're in a wsync |
| 1410 | * filesystem and the file has already been unlinked. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | * |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1412 | * The caller is responsible for correctly setting the sync parameter. It gets |
| 1413 | * too hard for us to guess here which path we're being called out of just |
| 1414 | * based on inode state. |
| 1415 | * |
| 1416 | * If we get an error, we must return with the inode locked and linked into the |
| 1417 | * current transaction. This keeps things simple for the higher level code, |
| 1418 | * because it always knows that the inode is locked and held in the transaction |
| 1419 | * that returns to it whether errors occur or not. We don't mark the inode |
| 1420 | * dirty on error so that transactions can be easily aborted if possible. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | */ |
| 1422 | int |
| 1423 | xfs_itruncate_finish( |
| 1424 | xfs_trans_t **tp, |
| 1425 | xfs_inode_t *ip, |
| 1426 | xfs_fsize_t new_size, |
| 1427 | int fork, |
| 1428 | int sync) |
| 1429 | { |
| 1430 | xfs_fsblock_t first_block; |
| 1431 | xfs_fileoff_t first_unmap_block; |
| 1432 | xfs_fileoff_t last_block; |
| 1433 | xfs_filblks_t unmap_len=0; |
| 1434 | xfs_mount_t *mp; |
| 1435 | xfs_trans_t *ntp; |
| 1436 | int done; |
| 1437 | int committed; |
| 1438 | xfs_bmap_free_t free_list; |
| 1439 | int error; |
| 1440 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 1441 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_IOLOCK_EXCL)); |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1442 | ASSERT((new_size == 0) || (new_size <= ip->i_size)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | ASSERT(*tp != NULL); |
| 1444 | ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES); |
| 1445 | ASSERT(ip->i_transp == *tp); |
| 1446 | ASSERT(ip->i_itemp != NULL); |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1447 | ASSERT(ip->i_itemp->ili_lock_flags == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | |
| 1449 | |
| 1450 | ntp = *tp; |
| 1451 | mp = (ntp)->t_mountp; |
| 1452 | ASSERT(! XFS_NOT_DQATTACHED(mp, ip)); |
| 1453 | |
| 1454 | /* |
| 1455 | * We only support truncating the entire attribute fork. |
| 1456 | */ |
| 1457 | if (fork == XFS_ATTR_FORK) { |
| 1458 | new_size = 0LL; |
| 1459 | } |
| 1460 | first_unmap_block = XFS_B_TO_FSB(mp, (xfs_ufsize_t)new_size); |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1461 | trace_xfs_itruncate_finish_start(ip, new_size); |
| 1462 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | /* |
| 1464 | * The first thing we do is set the size to new_size permanently |
| 1465 | * on disk. This way we don't have to worry about anyone ever |
| 1466 | * being able to look at the data being freed even in the face |
| 1467 | * of a crash. What we're getting around here is the case where |
| 1468 | * we free a block, it is allocated to another file, it is written |
| 1469 | * to, and then we crash. If the new data gets written to the |
| 1470 | * file but the log buffers containing the free and reallocation |
| 1471 | * don't, then we'd end up with garbage in the blocks being freed. |
| 1472 | * As long as we make the new_size permanent before actually |
| 1473 | * freeing any blocks it doesn't matter if they get writtten to. |
| 1474 | * |
| 1475 | * The callers must signal into us whether or not the size |
| 1476 | * setting here must be synchronous. There are a few cases |
| 1477 | * where it doesn't have to be synchronous. Those cases |
| 1478 | * occur if the file is unlinked and we know the unlink is |
| 1479 | * permanent or if the blocks being truncated are guaranteed |
| 1480 | * to be beyond the inode eof (regardless of the link count) |
| 1481 | * and the eof value is permanent. Both of these cases occur |
| 1482 | * only on wsync-mounted filesystems. In those cases, we're |
| 1483 | * guaranteed that no user will ever see the data in the blocks |
| 1484 | * that are being truncated so the truncate can run async. |
| 1485 | * In the free beyond eof case, the file may wind up with |
| 1486 | * more blocks allocated to it than it needs if we crash |
| 1487 | * and that won't get fixed until the next time the file |
| 1488 | * is re-opened and closed but that's ok as that shouldn't |
| 1489 | * be too many blocks. |
| 1490 | * |
| 1491 | * However, we can't just make all wsync xactions run async |
| 1492 | * because there's one call out of the create path that needs |
| 1493 | * to run sync where it's truncating an existing file to size |
| 1494 | * 0 whose size is > 0. |
| 1495 | * |
| 1496 | * It's probably possible to come up with a test in this |
| 1497 | * routine that would correctly distinguish all the above |
| 1498 | * cases from the values of the function parameters and the |
| 1499 | * inode state but for sanity's sake, I've decided to let the |
| 1500 | * layers above just tell us. It's simpler to correctly figure |
| 1501 | * out in the layer above exactly under what conditions we |
| 1502 | * can run async and I think it's easier for others read and |
| 1503 | * follow the logic in case something has to be changed. |
| 1504 | * cscope is your friend -- rcc. |
| 1505 | * |
| 1506 | * The attribute fork is much simpler. |
| 1507 | * |
| 1508 | * For the attribute fork we allow the caller to tell us whether |
| 1509 | * the unlink of the inode that led to this call is yet permanent |
| 1510 | * in the on disk log. If it is not and we will be freeing extents |
| 1511 | * in this inode then we make the first transaction synchronous |
| 1512 | * to make sure that the unlink is permanent by the time we free |
| 1513 | * the blocks. |
| 1514 | */ |
| 1515 | if (fork == XFS_DATA_FORK) { |
| 1516 | if (ip->i_d.di_nextents > 0) { |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1517 | /* |
| 1518 | * If we are not changing the file size then do |
| 1519 | * not update the on-disk file size - we may be |
| 1520 | * called from xfs_inactive_free_eofblocks(). If we |
| 1521 | * update the on-disk file size and then the system |
| 1522 | * crashes before the contents of the file are |
| 1523 | * flushed to disk then the files may be full of |
| 1524 | * holes (ie NULL files bug). |
| 1525 | */ |
| 1526 | if (ip->i_size != new_size) { |
| 1527 | ip->i_d.di_size = new_size; |
| 1528 | ip->i_size = new_size; |
| 1529 | xfs_trans_log_inode(ntp, ip, XFS_ILOG_CORE); |
| 1530 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | } |
| 1532 | } else if (sync) { |
| 1533 | ASSERT(!(mp->m_flags & XFS_MOUNT_WSYNC)); |
| 1534 | if (ip->i_d.di_anextents > 0) |
| 1535 | xfs_trans_set_sync(ntp); |
| 1536 | } |
| 1537 | ASSERT(fork == XFS_DATA_FORK || |
| 1538 | (fork == XFS_ATTR_FORK && |
| 1539 | ((sync && !(mp->m_flags & XFS_MOUNT_WSYNC)) || |
| 1540 | (sync == 0 && (mp->m_flags & XFS_MOUNT_WSYNC))))); |
| 1541 | |
| 1542 | /* |
| 1543 | * Since it is possible for space to become allocated beyond |
| 1544 | * the end of the file (in a crash where the space is allocated |
| 1545 | * but the inode size is not yet updated), simply remove any |
| 1546 | * blocks which show up between the new EOF and the maximum |
| 1547 | * possible file size. If the first block to be removed is |
| 1548 | * beyond the maximum file size (ie it is the same as last_block), |
| 1549 | * then there is nothing to do. |
| 1550 | */ |
| 1551 | last_block = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); |
| 1552 | ASSERT(first_unmap_block <= last_block); |
| 1553 | done = 0; |
| 1554 | if (last_block == first_unmap_block) { |
| 1555 | done = 1; |
| 1556 | } else { |
| 1557 | unmap_len = last_block - first_unmap_block + 1; |
| 1558 | } |
| 1559 | while (!done) { |
| 1560 | /* |
| 1561 | * Free up up to XFS_ITRUNC_MAX_EXTENTS. xfs_bunmapi() |
| 1562 | * will tell us whether it freed the entire range or |
| 1563 | * not. If this is a synchronous mount (wsync), |
| 1564 | * then we can tell bunmapi to keep all the |
| 1565 | * transactions asynchronous since the unlink |
| 1566 | * transaction that made this inode inactive has |
| 1567 | * already hit the disk. There's no danger of |
| 1568 | * the freed blocks being reused, there being a |
| 1569 | * crash, and the reused blocks suddenly reappearing |
| 1570 | * in this file with garbage in them once recovery |
| 1571 | * runs. |
| 1572 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1573 | xfs_bmap_init(&free_list, &first_block); |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 1574 | error = xfs_bunmapi(ntp, ip, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 1575 | first_unmap_block, unmap_len, |
Christoph Hellwig | cd8b0bb | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1576 | xfs_bmapi_aflag(fork), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | XFS_ITRUNC_MAX_EXTENTS, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 1578 | &first_block, &free_list, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1579 | &done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | if (error) { |
| 1581 | /* |
| 1582 | * If the bunmapi call encounters an error, |
| 1583 | * return to the caller where the transaction |
| 1584 | * can be properly aborted. We just need to |
| 1585 | * make sure we're not holding any resources |
| 1586 | * that we were not when we came in. |
| 1587 | */ |
| 1588 | xfs_bmap_cancel(&free_list); |
| 1589 | return error; |
| 1590 | } |
| 1591 | |
| 1592 | /* |
| 1593 | * Duplicate the transaction that has the permanent |
| 1594 | * reservation and commit the old transaction. |
| 1595 | */ |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1596 | error = xfs_bmap_finish(tp, &free_list, &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | ntp = *tp; |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1598 | if (committed) |
| 1599 | xfs_trans_ijoin(ntp, ip); |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1600 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | if (error) { |
| 1602 | /* |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1603 | * If the bmap finish call encounters an error, return |
| 1604 | * to the caller where the transaction can be properly |
| 1605 | * aborted. We just need to make sure we're not |
| 1606 | * holding any resources that we were not when we came |
| 1607 | * in. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1608 | * |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1609 | * Aborting from this point might lose some blocks in |
| 1610 | * the file system, but oh well. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | */ |
| 1612 | xfs_bmap_cancel(&free_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | return error; |
| 1614 | } |
| 1615 | |
| 1616 | if (committed) { |
| 1617 | /* |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1618 | * Mark the inode dirty so it will be logged and |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1619 | * moved forward in the log as part of every commit. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | xfs_trans_log_inode(ntp, ip, XFS_ILOG_CORE); |
| 1622 | } |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1623 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | ntp = xfs_trans_dup(ntp); |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1625 | error = xfs_trans_commit(*tp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | *tp = ntp; |
David Chinner | e5720ee | 2008-04-10 12:21:18 +1000 | [diff] [blame] | 1627 | |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1628 | xfs_trans_ijoin(ntp, ip); |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1629 | |
Dave Chinner | cc09c0d | 2008-11-17 17:37:10 +1100 | [diff] [blame] | 1630 | if (error) |
| 1631 | return error; |
| 1632 | /* |
| 1633 | * transaction commit worked ok so we can drop the extra ticket |
| 1634 | * reference that we gained in xfs_trans_dup() |
| 1635 | */ |
| 1636 | xfs_log_ticket_put(ntp->t_ticket); |
| 1637 | error = xfs_trans_reserve(ntp, 0, |
David Chinner | f648505 | 2008-04-17 16:50:04 +1000 | [diff] [blame] | 1638 | XFS_ITRUNCATE_LOG_RES(mp), 0, |
| 1639 | XFS_TRANS_PERM_LOG_RES, |
| 1640 | XFS_ITRUNCATE_LOG_COUNT); |
| 1641 | if (error) |
| 1642 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | } |
| 1644 | /* |
| 1645 | * Only update the size in the case of the data fork, but |
| 1646 | * always re-log the inode so that our permanent transaction |
| 1647 | * can keep on rolling it forward in the log. |
| 1648 | */ |
| 1649 | if (fork == XFS_DATA_FORK) { |
| 1650 | xfs_isize_check(mp, ip, new_size); |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 1651 | /* |
| 1652 | * If we are not changing the file size then do |
| 1653 | * not update the on-disk file size - we may be |
| 1654 | * called from xfs_inactive_free_eofblocks(). If we |
| 1655 | * update the on-disk file size and then the system |
| 1656 | * crashes before the contents of the file are |
| 1657 | * flushed to disk then the files may be full of |
| 1658 | * holes (ie NULL files bug). |
| 1659 | */ |
| 1660 | if (ip->i_size != new_size) { |
| 1661 | ip->i_d.di_size = new_size; |
| 1662 | ip->i_size = new_size; |
| 1663 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | } |
| 1665 | xfs_trans_log_inode(ntp, ip, XFS_ILOG_CORE); |
| 1666 | ASSERT((new_size != 0) || |
| 1667 | (fork == XFS_ATTR_FORK) || |
| 1668 | (ip->i_delayed_blks == 0)); |
| 1669 | ASSERT((new_size != 0) || |
| 1670 | (fork == XFS_ATTR_FORK) || |
| 1671 | (ip->i_d.di_nextents == 0)); |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1672 | trace_xfs_itruncate_finish_end(ip, new_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | return 0; |
| 1674 | } |
| 1675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | /* |
| 1677 | * This is called when the inode's link count goes to 0. |
| 1678 | * We place the on-disk inode on a list in the AGI. It |
| 1679 | * will be pulled from this list when the inode is freed. |
| 1680 | */ |
| 1681 | int |
| 1682 | xfs_iunlink( |
| 1683 | xfs_trans_t *tp, |
| 1684 | xfs_inode_t *ip) |
| 1685 | { |
| 1686 | xfs_mount_t *mp; |
| 1687 | xfs_agi_t *agi; |
| 1688 | xfs_dinode_t *dip; |
| 1689 | xfs_buf_t *agibp; |
| 1690 | xfs_buf_t *ibp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1691 | xfs_agino_t agino; |
| 1692 | short bucket_index; |
| 1693 | int offset; |
| 1694 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | |
| 1696 | ASSERT(ip->i_d.di_nlink == 0); |
| 1697 | ASSERT(ip->i_d.di_mode != 0); |
| 1698 | ASSERT(ip->i_transp == tp); |
| 1699 | |
| 1700 | mp = tp->t_mountp; |
| 1701 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | /* |
| 1703 | * Get the agi buffer first. It ensures lock ordering |
| 1704 | * on the list. |
| 1705 | */ |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1706 | error = xfs_read_agi(mp, tp, XFS_INO_TO_AGNO(mp, ip->i_ino), &agibp); |
Vlad Apostolov | 859d718 | 2007-10-11 17:44:18 +1000 | [diff] [blame] | 1707 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | agi = XFS_BUF_TO_AGI(agibp); |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1710 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | /* |
| 1712 | * Get the index into the agi hash table for the |
| 1713 | * list this inode will go on. |
| 1714 | */ |
| 1715 | agino = XFS_INO_TO_AGINO(mp, ip->i_ino); |
| 1716 | ASSERT(agino != 0); |
| 1717 | bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS; |
| 1718 | ASSERT(agi->agi_unlinked[bucket_index]); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1719 | ASSERT(be32_to_cpu(agi->agi_unlinked[bucket_index]) != agino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1721 | if (be32_to_cpu(agi->agi_unlinked[bucket_index]) != NULLAGINO) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | /* |
| 1723 | * There is already another inode in the bucket we need |
| 1724 | * to add ourselves to. Add us at the front of the list. |
| 1725 | * Here we put the head pointer into our next pointer, |
| 1726 | * and then we fall through to point the head at us. |
| 1727 | */ |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 1728 | error = xfs_itobp(mp, tp, ip, &dip, &ibp, XBF_LOCK); |
Vlad Apostolov | c319b58 | 2007-11-23 16:27:51 +1100 | [diff] [blame] | 1729 | if (error) |
| 1730 | return error; |
| 1731 | |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 1732 | ASSERT(be32_to_cpu(dip->di_next_unlinked) == NULLAGINO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | /* both on-disk, don't endian flip twice */ |
| 1734 | dip->di_next_unlinked = agi->agi_unlinked[bucket_index]; |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1735 | offset = ip->i_imap.im_boffset + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | offsetof(xfs_dinode_t, di_next_unlinked); |
| 1737 | xfs_trans_inode_buf(tp, ibp); |
| 1738 | xfs_trans_log_buf(tp, ibp, offset, |
| 1739 | (offset + sizeof(xfs_agino_t) - 1)); |
| 1740 | xfs_inobp_check(mp, ibp); |
| 1741 | } |
| 1742 | |
| 1743 | /* |
| 1744 | * Point the bucket head pointer at the inode being inserted. |
| 1745 | */ |
| 1746 | ASSERT(agino != 0); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1747 | agi->agi_unlinked[bucket_index] = cpu_to_be32(agino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
| 1749 | (sizeof(xfs_agino_t) * bucket_index); |
| 1750 | xfs_trans_log_buf(tp, agibp, offset, |
| 1751 | (offset + sizeof(xfs_agino_t) - 1)); |
| 1752 | return 0; |
| 1753 | } |
| 1754 | |
| 1755 | /* |
| 1756 | * Pull the on-disk inode from the AGI unlinked list. |
| 1757 | */ |
| 1758 | STATIC int |
| 1759 | xfs_iunlink_remove( |
| 1760 | xfs_trans_t *tp, |
| 1761 | xfs_inode_t *ip) |
| 1762 | { |
| 1763 | xfs_ino_t next_ino; |
| 1764 | xfs_mount_t *mp; |
| 1765 | xfs_agi_t *agi; |
| 1766 | xfs_dinode_t *dip; |
| 1767 | xfs_buf_t *agibp; |
| 1768 | xfs_buf_t *ibp; |
| 1769 | xfs_agnumber_t agno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1770 | xfs_agino_t agino; |
| 1771 | xfs_agino_t next_agino; |
| 1772 | xfs_buf_t *last_ibp; |
Nathan Scott | 6fdf8cc | 2006-06-28 10:13:52 +1000 | [diff] [blame] | 1773 | xfs_dinode_t *last_dip = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | short bucket_index; |
Nathan Scott | 6fdf8cc | 2006-06-28 10:13:52 +1000 | [diff] [blame] | 1775 | int offset, last_offset = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | mp = tp->t_mountp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | agno = XFS_INO_TO_AGNO(mp, ip->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1780 | |
| 1781 | /* |
| 1782 | * Get the agi buffer first. It ensures lock ordering |
| 1783 | * on the list. |
| 1784 | */ |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1785 | error = xfs_read_agi(mp, tp, agno, &agibp); |
| 1786 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1787 | return error; |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1788 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | agi = XFS_BUF_TO_AGI(agibp); |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1790 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | /* |
| 1792 | * Get the index into the agi hash table for the |
| 1793 | * list this inode will go on. |
| 1794 | */ |
| 1795 | agino = XFS_INO_TO_AGINO(mp, ip->i_ino); |
| 1796 | ASSERT(agino != 0); |
| 1797 | bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS; |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1798 | ASSERT(be32_to_cpu(agi->agi_unlinked[bucket_index]) != NULLAGINO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1799 | ASSERT(agi->agi_unlinked[bucket_index]); |
| 1800 | |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1801 | if (be32_to_cpu(agi->agi_unlinked[bucket_index]) == agino) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | /* |
| 1803 | * We're at the head of the list. Get the inode's |
| 1804 | * on-disk buffer to see if there is anyone after us |
| 1805 | * on the list. Only modify our next pointer if it |
| 1806 | * is not already NULLAGINO. This saves us the overhead |
| 1807 | * of dealing with the buffer when there is no need to |
| 1808 | * change it. |
| 1809 | */ |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 1810 | error = xfs_itobp(mp, tp, ip, &dip, &ibp, XBF_LOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1811 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1812 | xfs_warn(mp, "%s: xfs_itobp() returned error %d.", |
| 1813 | __func__, error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | return error; |
| 1815 | } |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 1816 | next_agino = be32_to_cpu(dip->di_next_unlinked); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1817 | ASSERT(next_agino != 0); |
| 1818 | if (next_agino != NULLAGINO) { |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 1819 | dip->di_next_unlinked = cpu_to_be32(NULLAGINO); |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1820 | offset = ip->i_imap.im_boffset + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1821 | offsetof(xfs_dinode_t, di_next_unlinked); |
| 1822 | xfs_trans_inode_buf(tp, ibp); |
| 1823 | xfs_trans_log_buf(tp, ibp, offset, |
| 1824 | (offset + sizeof(xfs_agino_t) - 1)); |
| 1825 | xfs_inobp_check(mp, ibp); |
| 1826 | } else { |
| 1827 | xfs_trans_brelse(tp, ibp); |
| 1828 | } |
| 1829 | /* |
| 1830 | * Point the bucket head pointer at the next inode. |
| 1831 | */ |
| 1832 | ASSERT(next_agino != 0); |
| 1833 | ASSERT(next_agino != agino); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1834 | agi->agi_unlinked[bucket_index] = cpu_to_be32(next_agino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | offset = offsetof(xfs_agi_t, agi_unlinked) + |
| 1836 | (sizeof(xfs_agino_t) * bucket_index); |
| 1837 | xfs_trans_log_buf(tp, agibp, offset, |
| 1838 | (offset + sizeof(xfs_agino_t) - 1)); |
| 1839 | } else { |
| 1840 | /* |
| 1841 | * We need to search the list for the inode being freed. |
| 1842 | */ |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1843 | next_agino = be32_to_cpu(agi->agi_unlinked[bucket_index]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1844 | last_ibp = NULL; |
| 1845 | while (next_agino != agino) { |
| 1846 | /* |
| 1847 | * If the last inode wasn't the one pointing to |
| 1848 | * us, then release its buffer since we're not |
| 1849 | * going to do anything with it. |
| 1850 | */ |
| 1851 | if (last_ibp != NULL) { |
| 1852 | xfs_trans_brelse(tp, last_ibp); |
| 1853 | } |
| 1854 | next_ino = XFS_AGINO_TO_INO(mp, agno, next_agino); |
| 1855 | error = xfs_inotobp(mp, tp, next_ino, &last_dip, |
Christoph Hellwig | c679eef | 2008-10-30 18:04:13 +1100 | [diff] [blame] | 1856 | &last_ibp, &last_offset, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1858 | xfs_warn(mp, |
| 1859 | "%s: xfs_inotobp() returned error %d.", |
| 1860 | __func__, error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1861 | return error; |
| 1862 | } |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 1863 | next_agino = be32_to_cpu(last_dip->di_next_unlinked); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | ASSERT(next_agino != NULLAGINO); |
| 1865 | ASSERT(next_agino != 0); |
| 1866 | } |
| 1867 | /* |
| 1868 | * Now last_ibp points to the buffer previous to us on |
| 1869 | * the unlinked list. Pull us from the list. |
| 1870 | */ |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 1871 | error = xfs_itobp(mp, tp, ip, &dip, &ibp, XBF_LOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | if (error) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 1873 | xfs_warn(mp, "%s: xfs_itobp(2) returned error %d.", |
| 1874 | __func__, error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1875 | return error; |
| 1876 | } |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 1877 | next_agino = be32_to_cpu(dip->di_next_unlinked); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | ASSERT(next_agino != 0); |
| 1879 | ASSERT(next_agino != agino); |
| 1880 | if (next_agino != NULLAGINO) { |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 1881 | dip->di_next_unlinked = cpu_to_be32(NULLAGINO); |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1882 | offset = ip->i_imap.im_boffset + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | offsetof(xfs_dinode_t, di_next_unlinked); |
| 1884 | xfs_trans_inode_buf(tp, ibp); |
| 1885 | xfs_trans_log_buf(tp, ibp, offset, |
| 1886 | (offset + sizeof(xfs_agino_t) - 1)); |
| 1887 | xfs_inobp_check(mp, ibp); |
| 1888 | } else { |
| 1889 | xfs_trans_brelse(tp, ibp); |
| 1890 | } |
| 1891 | /* |
| 1892 | * Point the previous inode on the list to the next inode. |
| 1893 | */ |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 1894 | last_dip->di_next_unlinked = cpu_to_be32(next_agino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | ASSERT(next_agino != 0); |
| 1896 | offset = last_offset + offsetof(xfs_dinode_t, di_next_unlinked); |
| 1897 | xfs_trans_inode_buf(tp, last_ibp); |
| 1898 | xfs_trans_log_buf(tp, last_ibp, offset, |
| 1899 | (offset + sizeof(xfs_agino_t) - 1)); |
| 1900 | xfs_inobp_check(mp, last_ibp); |
| 1901 | } |
| 1902 | return 0; |
| 1903 | } |
| 1904 | |
Dave Chinner | 5b3eed7 | 2010-08-24 11:42:41 +1000 | [diff] [blame] | 1905 | /* |
| 1906 | * A big issue when freeing the inode cluster is is that we _cannot_ skip any |
| 1907 | * inodes that are in memory - they all must be marked stale and attached to |
| 1908 | * the cluster buffer. |
| 1909 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 1910 | STATIC void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | xfs_ifree_cluster( |
| 1912 | xfs_inode_t *free_ip, |
| 1913 | xfs_trans_t *tp, |
| 1914 | xfs_ino_t inum) |
| 1915 | { |
| 1916 | xfs_mount_t *mp = free_ip->i_mount; |
| 1917 | int blks_per_cluster; |
| 1918 | int nbufs; |
| 1919 | int ninodes; |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 1920 | int i, j; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1921 | xfs_daddr_t blkno; |
| 1922 | xfs_buf_t *bp; |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 1923 | xfs_inode_t *ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1924 | xfs_inode_log_item_t *iip; |
| 1925 | xfs_log_item_t *lip; |
Dave Chinner | 5017e97 | 2010-01-11 11:47:40 +0000 | [diff] [blame] | 1926 | struct xfs_perag *pag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1927 | |
Dave Chinner | 5017e97 | 2010-01-11 11:47:40 +0000 | [diff] [blame] | 1928 | pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, inum)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | if (mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp)) { |
| 1930 | blks_per_cluster = 1; |
| 1931 | ninodes = mp->m_sb.sb_inopblock; |
| 1932 | nbufs = XFS_IALLOC_BLOCKS(mp); |
| 1933 | } else { |
| 1934 | blks_per_cluster = XFS_INODE_CLUSTER_SIZE(mp) / |
| 1935 | mp->m_sb.sb_blocksize; |
| 1936 | ninodes = blks_per_cluster * mp->m_sb.sb_inopblock; |
| 1937 | nbufs = XFS_IALLOC_BLOCKS(mp) / blks_per_cluster; |
| 1938 | } |
| 1939 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | for (j = 0; j < nbufs; j++, inum += ninodes) { |
| 1941 | blkno = XFS_AGB_TO_DADDR(mp, XFS_INO_TO_AGNO(mp, inum), |
| 1942 | XFS_INO_TO_AGBNO(mp, inum)); |
| 1943 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | /* |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 1945 | * We obtain and lock the backing buffer first in the process |
| 1946 | * here, as we have to ensure that any dirty inode that we |
| 1947 | * can't get the flush lock on is attached to the buffer. |
| 1948 | * If we scan the in-memory inodes first, then buffer IO can |
| 1949 | * complete before we get a lock on it, and hence we may fail |
| 1950 | * to mark all the active inodes on the buffer stale. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1951 | */ |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 1952 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, blkno, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | mp->m_bsize * blks_per_cluster, |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 1954 | XBF_LOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1955 | |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 1956 | /* |
| 1957 | * Walk the inodes already attached to the buffer and mark them |
| 1958 | * stale. These will all have the flush locks held, so an |
Dave Chinner | 5b3eed7 | 2010-08-24 11:42:41 +1000 | [diff] [blame] | 1959 | * in-memory inode walk can't lock them. By marking them all |
| 1960 | * stale first, we will not attempt to lock them in the loop |
| 1961 | * below as the XFS_ISTALE flag will be set. |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 1962 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1963 | lip = XFS_BUF_FSPRIVATE(bp, xfs_log_item_t *); |
| 1964 | while (lip) { |
| 1965 | if (lip->li_type == XFS_LI_INODE) { |
| 1966 | iip = (xfs_inode_log_item_t *)lip; |
| 1967 | ASSERT(iip->ili_logged == 1); |
Christoph Hellwig | ca30b2a | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1968 | lip->li_cb = xfs_istale_done; |
David Chinner | 7b2e2a3 | 2008-10-30 17:39:12 +1100 | [diff] [blame] | 1969 | xfs_trans_ail_copy_lsn(mp->m_ail, |
| 1970 | &iip->ili_flush_lsn, |
| 1971 | &iip->ili_item.li_lsn); |
David Chinner | e5ffd2b | 2006-11-21 18:55:33 +1100 | [diff] [blame] | 1972 | xfs_iflags_set(iip->ili_inode, XFS_ISTALE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | } |
| 1974 | lip = lip->li_bio_list; |
| 1975 | } |
| 1976 | |
Dave Chinner | 5b3eed7 | 2010-08-24 11:42:41 +1000 | [diff] [blame] | 1977 | |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 1978 | /* |
| 1979 | * For each inode in memory attempt to add it to the inode |
| 1980 | * buffer and set it up for being staled on buffer IO |
| 1981 | * completion. This is safe as we've locked out tail pushing |
| 1982 | * and flushing by locking the buffer. |
| 1983 | * |
| 1984 | * We have already marked every inode that was part of a |
| 1985 | * transaction stale above, which means there is no point in |
| 1986 | * even trying to lock them. |
| 1987 | */ |
| 1988 | for (i = 0; i < ninodes; i++) { |
Dave Chinner | 5b3eed7 | 2010-08-24 11:42:41 +1000 | [diff] [blame] | 1989 | retry: |
Dave Chinner | 1a3e8f3 | 2010-12-17 17:29:43 +1100 | [diff] [blame] | 1990 | rcu_read_lock(); |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 1991 | ip = radix_tree_lookup(&pag->pag_ici_root, |
| 1992 | XFS_INO_TO_AGINO(mp, (inum + i))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1993 | |
Dave Chinner | 1a3e8f3 | 2010-12-17 17:29:43 +1100 | [diff] [blame] | 1994 | /* Inode not in memory, nothing to do */ |
| 1995 | if (!ip) { |
| 1996 | rcu_read_unlock(); |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 1997 | continue; |
| 1998 | } |
| 1999 | |
Dave Chinner | 5b3eed7 | 2010-08-24 11:42:41 +1000 | [diff] [blame] | 2000 | /* |
Dave Chinner | 1a3e8f3 | 2010-12-17 17:29:43 +1100 | [diff] [blame] | 2001 | * because this is an RCU protected lookup, we could |
| 2002 | * find a recently freed or even reallocated inode |
| 2003 | * during the lookup. We need to check under the |
| 2004 | * i_flags_lock for a valid inode here. Skip it if it |
| 2005 | * is not valid, the wrong inode or stale. |
| 2006 | */ |
| 2007 | spin_lock(&ip->i_flags_lock); |
| 2008 | if (ip->i_ino != inum + i || |
| 2009 | __xfs_iflags_test(ip, XFS_ISTALE)) { |
| 2010 | spin_unlock(&ip->i_flags_lock); |
| 2011 | rcu_read_unlock(); |
| 2012 | continue; |
| 2013 | } |
| 2014 | spin_unlock(&ip->i_flags_lock); |
| 2015 | |
| 2016 | /* |
Dave Chinner | 5b3eed7 | 2010-08-24 11:42:41 +1000 | [diff] [blame] | 2017 | * Don't try to lock/unlock the current inode, but we |
| 2018 | * _cannot_ skip the other inodes that we did not find |
| 2019 | * in the list attached to the buffer and are not |
| 2020 | * already marked stale. If we can't lock it, back off |
| 2021 | * and retry. |
| 2022 | */ |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 2023 | if (ip != free_ip && |
| 2024 | !xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) { |
Dave Chinner | 1a3e8f3 | 2010-12-17 17:29:43 +1100 | [diff] [blame] | 2025 | rcu_read_unlock(); |
Dave Chinner | 5b3eed7 | 2010-08-24 11:42:41 +1000 | [diff] [blame] | 2026 | delay(1); |
| 2027 | goto retry; |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 2028 | } |
Dave Chinner | 1a3e8f3 | 2010-12-17 17:29:43 +1100 | [diff] [blame] | 2029 | rcu_read_unlock(); |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 2030 | |
Dave Chinner | 5b3eed7 | 2010-08-24 11:42:41 +1000 | [diff] [blame] | 2031 | xfs_iflock(ip); |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 2032 | xfs_iflags_set(ip, XFS_ISTALE); |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 2033 | |
Dave Chinner | 5b3eed7 | 2010-08-24 11:42:41 +1000 | [diff] [blame] | 2034 | /* |
| 2035 | * we don't need to attach clean inodes or those only |
| 2036 | * with unlogged changes (which we throw away, anyway). |
| 2037 | */ |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 2038 | iip = ip->i_itemp; |
Dave Chinner | 5b3eed7 | 2010-08-24 11:42:41 +1000 | [diff] [blame] | 2039 | if (!iip || xfs_inode_clean(ip)) { |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 2040 | ASSERT(ip != free_ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2041 | ip->i_update_core = 0; |
| 2042 | xfs_ifunlock(ip); |
| 2043 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 2044 | continue; |
| 2045 | } |
| 2046 | |
| 2047 | iip->ili_last_fields = iip->ili_format.ilf_fields; |
| 2048 | iip->ili_format.ilf_fields = 0; |
| 2049 | iip->ili_logged = 1; |
David Chinner | 7b2e2a3 | 2008-10-30 17:39:12 +1100 | [diff] [blame] | 2050 | xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn, |
| 2051 | &iip->ili_item.li_lsn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | |
Christoph Hellwig | ca30b2a | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2053 | xfs_buf_attach_iodone(bp, xfs_istale_done, |
| 2054 | &iip->ili_item); |
Dave Chinner | 5b257b4 | 2010-06-03 16:22:29 +1000 | [diff] [blame] | 2055 | |
| 2056 | if (ip != free_ip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2057 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | } |
| 2059 | |
Dave Chinner | 5b3eed7 | 2010-08-24 11:42:41 +1000 | [diff] [blame] | 2060 | xfs_trans_stale_inode_buf(tp, bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2061 | xfs_trans_binval(tp, bp); |
| 2062 | } |
| 2063 | |
Dave Chinner | 5017e97 | 2010-01-11 11:47:40 +0000 | [diff] [blame] | 2064 | xfs_perag_put(pag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2065 | } |
| 2066 | |
| 2067 | /* |
| 2068 | * This is called to return an inode to the inode free list. |
| 2069 | * The inode should already be truncated to 0 length and have |
| 2070 | * no pages associated with it. This routine also assumes that |
| 2071 | * the inode is already a part of the transaction. |
| 2072 | * |
| 2073 | * The on-disk copy of the inode will have been added to the list |
| 2074 | * of unlinked inodes in the AGI. We need to remove the inode from |
| 2075 | * that list atomically with respect to freeing it here. |
| 2076 | */ |
| 2077 | int |
| 2078 | xfs_ifree( |
| 2079 | xfs_trans_t *tp, |
| 2080 | xfs_inode_t *ip, |
| 2081 | xfs_bmap_free_t *flist) |
| 2082 | { |
| 2083 | int error; |
| 2084 | int delete; |
| 2085 | xfs_ino_t first_ino; |
Vlad Apostolov | c319b58 | 2007-11-23 16:27:51 +1100 | [diff] [blame] | 2086 | xfs_dinode_t *dip; |
| 2087 | xfs_buf_t *ibp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 2089 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2090 | ASSERT(ip->i_transp == tp); |
| 2091 | ASSERT(ip->i_d.di_nlink == 0); |
| 2092 | ASSERT(ip->i_d.di_nextents == 0); |
| 2093 | ASSERT(ip->i_d.di_anextents == 0); |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 2094 | ASSERT((ip->i_d.di_size == 0 && ip->i_size == 0) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2095 | ((ip->i_d.di_mode & S_IFMT) != S_IFREG)); |
| 2096 | ASSERT(ip->i_d.di_nblocks == 0); |
| 2097 | |
| 2098 | /* |
| 2099 | * Pull the on-disk inode from the AGI unlinked list. |
| 2100 | */ |
| 2101 | error = xfs_iunlink_remove(tp, ip); |
| 2102 | if (error != 0) { |
| 2103 | return error; |
| 2104 | } |
| 2105 | |
| 2106 | error = xfs_difree(tp, ip->i_ino, flist, &delete, &first_ino); |
| 2107 | if (error != 0) { |
| 2108 | return error; |
| 2109 | } |
| 2110 | ip->i_d.di_mode = 0; /* mark incore inode as free */ |
| 2111 | ip->i_d.di_flags = 0; |
| 2112 | ip->i_d.di_dmevmask = 0; |
| 2113 | ip->i_d.di_forkoff = 0; /* mark the attr fork not in use */ |
| 2114 | ip->i_df.if_ext_max = |
| 2115 | XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t); |
| 2116 | ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS; |
| 2117 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; |
| 2118 | /* |
| 2119 | * Bump the generation count so no one will be confused |
| 2120 | * by reincarnations of this inode. |
| 2121 | */ |
| 2122 | ip->i_d.di_gen++; |
Vlad Apostolov | c319b58 | 2007-11-23 16:27:51 +1100 | [diff] [blame] | 2123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 2125 | |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 2126 | error = xfs_itobp(ip->i_mount, tp, ip, &dip, &ibp, XBF_LOCK); |
Vlad Apostolov | c319b58 | 2007-11-23 16:27:51 +1100 | [diff] [blame] | 2127 | if (error) |
| 2128 | return error; |
| 2129 | |
| 2130 | /* |
| 2131 | * Clear the on-disk di_mode. This is to prevent xfs_bulkstat |
| 2132 | * from picking up this inode when it is reclaimed (its incore state |
| 2133 | * initialzed but not flushed to disk yet). The in-core di_mode is |
| 2134 | * already cleared and a corresponding transaction logged. |
| 2135 | * The hack here just synchronizes the in-core to on-disk |
| 2136 | * di_mode value in advance before the actual inode sync to disk. |
| 2137 | * This is OK because the inode is already unlinked and would never |
| 2138 | * change its di_mode again for this inode generation. |
| 2139 | * This is a temporary hack that would require a proper fix |
| 2140 | * in the future. |
| 2141 | */ |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 2142 | dip->di_mode = 0; |
Vlad Apostolov | c319b58 | 2007-11-23 16:27:51 +1100 | [diff] [blame] | 2143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2144 | if (delete) { |
| 2145 | xfs_ifree_cluster(ip, tp, first_ino); |
| 2146 | } |
| 2147 | |
| 2148 | return 0; |
| 2149 | } |
| 2150 | |
| 2151 | /* |
| 2152 | * Reallocate the space for if_broot based on the number of records |
| 2153 | * being added or deleted as indicated in rec_diff. Move the records |
| 2154 | * and pointers in if_broot to fit the new size. When shrinking this |
| 2155 | * will eliminate holes between the records and pointers created by |
| 2156 | * the caller. When growing this will create holes to be filled in |
| 2157 | * by the caller. |
| 2158 | * |
| 2159 | * The caller must not request to add more records than would fit in |
| 2160 | * the on-disk inode root. If the if_broot is currently NULL, then |
| 2161 | * if we adding records one will be allocated. The caller must also |
| 2162 | * not request that the number of records go below zero, although |
| 2163 | * it can go to zero. |
| 2164 | * |
| 2165 | * ip -- the inode whose if_broot area is changing |
| 2166 | * ext_diff -- the change in the number of records, positive or negative, |
| 2167 | * requested for the if_broot array. |
| 2168 | */ |
| 2169 | void |
| 2170 | xfs_iroot_realloc( |
| 2171 | xfs_inode_t *ip, |
| 2172 | int rec_diff, |
| 2173 | int whichfork) |
| 2174 | { |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 2175 | struct xfs_mount *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2176 | int cur_max; |
| 2177 | xfs_ifork_t *ifp; |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 2178 | struct xfs_btree_block *new_broot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | int new_max; |
| 2180 | size_t new_size; |
| 2181 | char *np; |
| 2182 | char *op; |
| 2183 | |
| 2184 | /* |
| 2185 | * Handle the degenerate case quietly. |
| 2186 | */ |
| 2187 | if (rec_diff == 0) { |
| 2188 | return; |
| 2189 | } |
| 2190 | |
| 2191 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 2192 | if (rec_diff > 0) { |
| 2193 | /* |
| 2194 | * If there wasn't any memory allocated before, just |
| 2195 | * allocate it now and get out. |
| 2196 | */ |
| 2197 | if (ifp->if_broot_bytes == 0) { |
| 2198 | new_size = (size_t)XFS_BMAP_BROOT_SPACE_CALC(rec_diff); |
Dave Chinner | 4a7eddd | 2010-07-20 17:53:59 +1000 | [diff] [blame] | 2199 | ifp->if_broot = kmem_alloc(new_size, KM_SLEEP | KM_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | ifp->if_broot_bytes = (int)new_size; |
| 2201 | return; |
| 2202 | } |
| 2203 | |
| 2204 | /* |
| 2205 | * If there is already an existing if_broot, then we need |
| 2206 | * to realloc() it and shift the pointers to their new |
| 2207 | * location. The records don't change location because |
| 2208 | * they are kept butted up against the btree block header. |
| 2209 | */ |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 2210 | cur_max = xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | new_max = cur_max + rec_diff; |
| 2212 | new_size = (size_t)XFS_BMAP_BROOT_SPACE_CALC(new_max); |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 2213 | ifp->if_broot = kmem_realloc(ifp->if_broot, new_size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2214 | (size_t)XFS_BMAP_BROOT_SPACE_CALC(cur_max), /* old size */ |
Dave Chinner | 4a7eddd | 2010-07-20 17:53:59 +1000 | [diff] [blame] | 2215 | KM_SLEEP | KM_NOFS); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 2216 | op = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, ifp->if_broot, 1, |
| 2217 | ifp->if_broot_bytes); |
| 2218 | np = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, ifp->if_broot, 1, |
| 2219 | (int)new_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2220 | ifp->if_broot_bytes = (int)new_size; |
| 2221 | ASSERT(ifp->if_broot_bytes <= |
| 2222 | XFS_IFORK_SIZE(ip, whichfork) + XFS_BROOT_SIZE_ADJ); |
| 2223 | memmove(np, op, cur_max * (uint)sizeof(xfs_dfsbno_t)); |
| 2224 | return; |
| 2225 | } |
| 2226 | |
| 2227 | /* |
| 2228 | * rec_diff is less than 0. In this case, we are shrinking the |
| 2229 | * if_broot buffer. It must already exist. If we go to zero |
| 2230 | * records, just get rid of the root and clear the status bit. |
| 2231 | */ |
| 2232 | ASSERT((ifp->if_broot != NULL) && (ifp->if_broot_bytes > 0)); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 2233 | cur_max = xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2234 | new_max = cur_max + rec_diff; |
| 2235 | ASSERT(new_max >= 0); |
| 2236 | if (new_max > 0) |
| 2237 | new_size = (size_t)XFS_BMAP_BROOT_SPACE_CALC(new_max); |
| 2238 | else |
| 2239 | new_size = 0; |
| 2240 | if (new_size > 0) { |
Dave Chinner | 4a7eddd | 2010-07-20 17:53:59 +1000 | [diff] [blame] | 2241 | new_broot = kmem_alloc(new_size, KM_SLEEP | KM_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2242 | /* |
| 2243 | * First copy over the btree block header. |
| 2244 | */ |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 2245 | memcpy(new_broot, ifp->if_broot, XFS_BTREE_LBLOCK_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2246 | } else { |
| 2247 | new_broot = NULL; |
| 2248 | ifp->if_flags &= ~XFS_IFBROOT; |
| 2249 | } |
| 2250 | |
| 2251 | /* |
| 2252 | * Only copy the records and pointers if there are any. |
| 2253 | */ |
| 2254 | if (new_max > 0) { |
| 2255 | /* |
| 2256 | * First copy the records. |
| 2257 | */ |
Christoph Hellwig | 136341b | 2008-10-30 17:11:40 +1100 | [diff] [blame] | 2258 | op = (char *)XFS_BMBT_REC_ADDR(mp, ifp->if_broot, 1); |
| 2259 | np = (char *)XFS_BMBT_REC_ADDR(mp, new_broot, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | memcpy(np, op, new_max * (uint)sizeof(xfs_bmbt_rec_t)); |
| 2261 | |
| 2262 | /* |
| 2263 | * Then copy the pointers. |
| 2264 | */ |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 2265 | op = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, ifp->if_broot, 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2266 | ifp->if_broot_bytes); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 2267 | np = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, new_broot, 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2268 | (int)new_size); |
| 2269 | memcpy(np, op, new_max * (uint)sizeof(xfs_dfsbno_t)); |
| 2270 | } |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2271 | kmem_free(ifp->if_broot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | ifp->if_broot = new_broot; |
| 2273 | ifp->if_broot_bytes = (int)new_size; |
| 2274 | ASSERT(ifp->if_broot_bytes <= |
| 2275 | XFS_IFORK_SIZE(ip, whichfork) + XFS_BROOT_SIZE_ADJ); |
| 2276 | return; |
| 2277 | } |
| 2278 | |
| 2279 | |
| 2280 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2281 | * This is called when the amount of space needed for if_data |
| 2282 | * is increased or decreased. The change in size is indicated by |
| 2283 | * the number of bytes that need to be added or deleted in the |
| 2284 | * byte_diff parameter. |
| 2285 | * |
| 2286 | * If the amount of space needed has decreased below the size of the |
| 2287 | * inline buffer, then switch to using the inline buffer. Otherwise, |
| 2288 | * use kmem_realloc() or kmem_alloc() to adjust the size of the buffer |
| 2289 | * to what is needed. |
| 2290 | * |
| 2291 | * ip -- the inode whose if_data area is changing |
| 2292 | * byte_diff -- the change in the number of bytes, positive or negative, |
| 2293 | * requested for the if_data array. |
| 2294 | */ |
| 2295 | void |
| 2296 | xfs_idata_realloc( |
| 2297 | xfs_inode_t *ip, |
| 2298 | int byte_diff, |
| 2299 | int whichfork) |
| 2300 | { |
| 2301 | xfs_ifork_t *ifp; |
| 2302 | int new_size; |
| 2303 | int real_size; |
| 2304 | |
| 2305 | if (byte_diff == 0) { |
| 2306 | return; |
| 2307 | } |
| 2308 | |
| 2309 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 2310 | new_size = (int)ifp->if_bytes + byte_diff; |
| 2311 | ASSERT(new_size >= 0); |
| 2312 | |
| 2313 | if (new_size == 0) { |
| 2314 | if (ifp->if_u1.if_data != ifp->if_u2.if_inline_data) { |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2315 | kmem_free(ifp->if_u1.if_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2316 | } |
| 2317 | ifp->if_u1.if_data = NULL; |
| 2318 | real_size = 0; |
| 2319 | } else if (new_size <= sizeof(ifp->if_u2.if_inline_data)) { |
| 2320 | /* |
| 2321 | * If the valid extents/data can fit in if_inline_ext/data, |
| 2322 | * copy them from the malloc'd vector and free it. |
| 2323 | */ |
| 2324 | if (ifp->if_u1.if_data == NULL) { |
| 2325 | ifp->if_u1.if_data = ifp->if_u2.if_inline_data; |
| 2326 | } else if (ifp->if_u1.if_data != ifp->if_u2.if_inline_data) { |
| 2327 | ASSERT(ifp->if_real_bytes != 0); |
| 2328 | memcpy(ifp->if_u2.if_inline_data, ifp->if_u1.if_data, |
| 2329 | new_size); |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2330 | kmem_free(ifp->if_u1.if_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2331 | ifp->if_u1.if_data = ifp->if_u2.if_inline_data; |
| 2332 | } |
| 2333 | real_size = 0; |
| 2334 | } else { |
| 2335 | /* |
| 2336 | * Stuck with malloc/realloc. |
| 2337 | * For inline data, the underlying buffer must be |
| 2338 | * a multiple of 4 bytes in size so that it can be |
| 2339 | * logged and stay on word boundaries. We enforce |
| 2340 | * that here. |
| 2341 | */ |
| 2342 | real_size = roundup(new_size, 4); |
| 2343 | if (ifp->if_u1.if_data == NULL) { |
| 2344 | ASSERT(ifp->if_real_bytes == 0); |
Dave Chinner | 4a7eddd | 2010-07-20 17:53:59 +1000 | [diff] [blame] | 2345 | ifp->if_u1.if_data = kmem_alloc(real_size, |
| 2346 | KM_SLEEP | KM_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2347 | } else if (ifp->if_u1.if_data != ifp->if_u2.if_inline_data) { |
| 2348 | /* |
| 2349 | * Only do the realloc if the underlying size |
| 2350 | * is really changing. |
| 2351 | */ |
| 2352 | if (ifp->if_real_bytes != real_size) { |
| 2353 | ifp->if_u1.if_data = |
| 2354 | kmem_realloc(ifp->if_u1.if_data, |
| 2355 | real_size, |
| 2356 | ifp->if_real_bytes, |
Dave Chinner | 4a7eddd | 2010-07-20 17:53:59 +1000 | [diff] [blame] | 2357 | KM_SLEEP | KM_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2358 | } |
| 2359 | } else { |
| 2360 | ASSERT(ifp->if_real_bytes == 0); |
Dave Chinner | 4a7eddd | 2010-07-20 17:53:59 +1000 | [diff] [blame] | 2361 | ifp->if_u1.if_data = kmem_alloc(real_size, |
| 2362 | KM_SLEEP | KM_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2363 | memcpy(ifp->if_u1.if_data, ifp->if_u2.if_inline_data, |
| 2364 | ifp->if_bytes); |
| 2365 | } |
| 2366 | } |
| 2367 | ifp->if_real_bytes = real_size; |
| 2368 | ifp->if_bytes = new_size; |
| 2369 | ASSERT(ifp->if_bytes <= XFS_IFORK_SIZE(ip, whichfork)); |
| 2370 | } |
| 2371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2372 | void |
| 2373 | xfs_idestroy_fork( |
| 2374 | xfs_inode_t *ip, |
| 2375 | int whichfork) |
| 2376 | { |
| 2377 | xfs_ifork_t *ifp; |
| 2378 | |
| 2379 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 2380 | if (ifp->if_broot != NULL) { |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2381 | kmem_free(ifp->if_broot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2382 | ifp->if_broot = NULL; |
| 2383 | } |
| 2384 | |
| 2385 | /* |
| 2386 | * If the format is local, then we can't have an extents |
| 2387 | * array so just look for an inline data array. If we're |
| 2388 | * not local then we may or may not have an extents list, |
| 2389 | * so check and free it up if we do. |
| 2390 | */ |
| 2391 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { |
| 2392 | if ((ifp->if_u1.if_data != ifp->if_u2.if_inline_data) && |
| 2393 | (ifp->if_u1.if_data != NULL)) { |
| 2394 | ASSERT(ifp->if_real_bytes != 0); |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2395 | kmem_free(ifp->if_u1.if_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2396 | ifp->if_u1.if_data = NULL; |
| 2397 | ifp->if_real_bytes = 0; |
| 2398 | } |
| 2399 | } else if ((ifp->if_flags & XFS_IFEXTENTS) && |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 2400 | ((ifp->if_flags & XFS_IFEXTIREC) || |
| 2401 | ((ifp->if_u1.if_extents != NULL) && |
| 2402 | (ifp->if_u1.if_extents != ifp->if_u2.if_inline_ext)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2403 | ASSERT(ifp->if_real_bytes != 0); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 2404 | xfs_iext_destroy(ifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2405 | } |
| 2406 | ASSERT(ifp->if_u1.if_extents == NULL || |
| 2407 | ifp->if_u1.if_extents == ifp->if_u2.if_inline_ext); |
| 2408 | ASSERT(ifp->if_real_bytes == 0); |
| 2409 | if (whichfork == XFS_ATTR_FORK) { |
| 2410 | kmem_zone_free(xfs_ifork_zone, ip->i_afp); |
| 2411 | ip->i_afp = NULL; |
| 2412 | } |
| 2413 | } |
| 2414 | |
| 2415 | /* |
Christoph Hellwig | 60ec6783 | 2010-02-17 19:43:56 +0000 | [diff] [blame] | 2416 | * This is called to unpin an inode. The caller must have the inode locked |
| 2417 | * in at least shared mode so that the buffer cannot be subsequently pinned |
| 2418 | * once someone is waiting for it to be unpinned. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2419 | */ |
Christoph Hellwig | 60ec6783 | 2010-02-17 19:43:56 +0000 | [diff] [blame] | 2420 | static void |
| 2421 | xfs_iunpin_nowait( |
| 2422 | struct xfs_inode *ip) |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2423 | { |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 2424 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2425 | |
Dave Chinner | 4aaf15d | 2010-03-08 11:24:07 +1100 | [diff] [blame] | 2426 | trace_xfs_inode_unpin_nowait(ip, _RET_IP_); |
| 2427 | |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2428 | /* Give the log a push to start the unpinning I/O */ |
Christoph Hellwig | 60ec6783 | 2010-02-17 19:43:56 +0000 | [diff] [blame] | 2429 | xfs_log_force_lsn(ip->i_mount, ip->i_itemp->ili_last_lsn, 0); |
Christoph Hellwig | a14a348 | 2010-01-19 09:56:46 +0000 | [diff] [blame] | 2430 | |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2431 | } |
| 2432 | |
Dave Chinner | 777df5a | 2010-02-06 12:37:26 +1100 | [diff] [blame] | 2433 | void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2434 | xfs_iunpin_wait( |
Christoph Hellwig | 60ec6783 | 2010-02-17 19:43:56 +0000 | [diff] [blame] | 2435 | struct xfs_inode *ip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2436 | { |
Christoph Hellwig | 60ec6783 | 2010-02-17 19:43:56 +0000 | [diff] [blame] | 2437 | if (xfs_ipincount(ip)) { |
| 2438 | xfs_iunpin_nowait(ip); |
| 2439 | wait_event(ip->i_ipin_wait, (xfs_ipincount(ip) == 0)); |
| 2440 | } |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2441 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2443 | /* |
| 2444 | * xfs_iextents_copy() |
| 2445 | * |
| 2446 | * This is called to copy the REAL extents (as opposed to the delayed |
| 2447 | * allocation extents) from the inode into the given buffer. It |
| 2448 | * returns the number of bytes copied into the buffer. |
| 2449 | * |
| 2450 | * If there are no delayed allocation extents, then we can just |
| 2451 | * memcpy() the extents into the buffer. Otherwise, we need to |
| 2452 | * examine each extent in turn and skip those which are delayed. |
| 2453 | */ |
| 2454 | int |
| 2455 | xfs_iextents_copy( |
| 2456 | xfs_inode_t *ip, |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 2457 | xfs_bmbt_rec_t *dp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2458 | int whichfork) |
| 2459 | { |
| 2460 | int copied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2461 | int i; |
| 2462 | xfs_ifork_t *ifp; |
| 2463 | int nrecs; |
| 2464 | xfs_fsblock_t start_block; |
| 2465 | |
| 2466 | ifp = XFS_IFORK_PTR(ip, whichfork); |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 2467 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | ASSERT(ifp->if_bytes > 0); |
| 2469 | |
| 2470 | nrecs = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
Eric Sandeen | 3a59c94 | 2007-07-11 11:09:47 +1000 | [diff] [blame] | 2471 | XFS_BMAP_TRACE_EXLIST(ip, nrecs, whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2472 | ASSERT(nrecs > 0); |
| 2473 | |
| 2474 | /* |
| 2475 | * There are some delayed allocation extents in the |
| 2476 | * inode, so copy the extents one at a time and skip |
| 2477 | * the delayed ones. There must be at least one |
| 2478 | * non-delayed extent. |
| 2479 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2480 | copied = 0; |
| 2481 | for (i = 0; i < nrecs; i++) { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 2482 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2483 | start_block = xfs_bmbt_get_startblock(ep); |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 2484 | if (isnullstartblock(start_block)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2485 | /* |
| 2486 | * It's a delayed allocation extent, so skip it. |
| 2487 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2488 | continue; |
| 2489 | } |
| 2490 | |
| 2491 | /* Translate to on disk format */ |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 2492 | put_unaligned(cpu_to_be64(ep->l0), &dp->l0); |
| 2493 | put_unaligned(cpu_to_be64(ep->l1), &dp->l1); |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 2494 | dp++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2495 | copied++; |
| 2496 | } |
| 2497 | ASSERT(copied != 0); |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 2498 | xfs_validate_extents(ifp, copied, XFS_EXTFMT_INODE(ip)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2499 | |
| 2500 | return (copied * (uint)sizeof(xfs_bmbt_rec_t)); |
| 2501 | } |
| 2502 | |
| 2503 | /* |
| 2504 | * Each of the following cases stores data into the same region |
| 2505 | * of the on-disk inode, so only one of them can be valid at |
| 2506 | * any given time. While it is possible to have conflicting formats |
| 2507 | * and log flags, e.g. having XFS_ILOG_?DATA set when the fork is |
| 2508 | * in EXTENTS format, this can only happen when the fork has |
| 2509 | * changed formats after being modified but before being flushed. |
| 2510 | * In these cases, the format always takes precedence, because the |
| 2511 | * format indicates the current state of the fork. |
| 2512 | */ |
| 2513 | /*ARGSUSED*/ |
David Chinner | e4ac967 | 2008-04-10 12:23:58 +1000 | [diff] [blame] | 2514 | STATIC void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | xfs_iflush_fork( |
| 2516 | xfs_inode_t *ip, |
| 2517 | xfs_dinode_t *dip, |
| 2518 | xfs_inode_log_item_t *iip, |
| 2519 | int whichfork, |
| 2520 | xfs_buf_t *bp) |
| 2521 | { |
| 2522 | char *cp; |
| 2523 | xfs_ifork_t *ifp; |
| 2524 | xfs_mount_t *mp; |
| 2525 | #ifdef XFS_TRANS_DEBUG |
| 2526 | int first; |
| 2527 | #endif |
| 2528 | static const short brootflag[2] = |
| 2529 | { XFS_ILOG_DBROOT, XFS_ILOG_ABROOT }; |
| 2530 | static const short dataflag[2] = |
| 2531 | { XFS_ILOG_DDATA, XFS_ILOG_ADATA }; |
| 2532 | static const short extflag[2] = |
| 2533 | { XFS_ILOG_DEXT, XFS_ILOG_AEXT }; |
| 2534 | |
David Chinner | e4ac967 | 2008-04-10 12:23:58 +1000 | [diff] [blame] | 2535 | if (!iip) |
| 2536 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2537 | ifp = XFS_IFORK_PTR(ip, whichfork); |
| 2538 | /* |
| 2539 | * This can happen if we gave up in iformat in an error path, |
| 2540 | * for the attribute fork. |
| 2541 | */ |
David Chinner | e4ac967 | 2008-04-10 12:23:58 +1000 | [diff] [blame] | 2542 | if (!ifp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2543 | ASSERT(whichfork == XFS_ATTR_FORK); |
David Chinner | e4ac967 | 2008-04-10 12:23:58 +1000 | [diff] [blame] | 2544 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2545 | } |
| 2546 | cp = XFS_DFORK_PTR(dip, whichfork); |
| 2547 | mp = ip->i_mount; |
| 2548 | switch (XFS_IFORK_FORMAT(ip, whichfork)) { |
| 2549 | case XFS_DINODE_FMT_LOCAL: |
| 2550 | if ((iip->ili_format.ilf_fields & dataflag[whichfork]) && |
| 2551 | (ifp->if_bytes > 0)) { |
| 2552 | ASSERT(ifp->if_u1.if_data != NULL); |
| 2553 | ASSERT(ifp->if_bytes <= XFS_IFORK_SIZE(ip, whichfork)); |
| 2554 | memcpy(cp, ifp->if_u1.if_data, ifp->if_bytes); |
| 2555 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2556 | break; |
| 2557 | |
| 2558 | case XFS_DINODE_FMT_EXTENTS: |
| 2559 | ASSERT((ifp->if_flags & XFS_IFEXTENTS) || |
| 2560 | !(iip->ili_format.ilf_fields & extflag[whichfork])); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 2561 | ASSERT((xfs_iext_get_ext(ifp, 0) != NULL) || |
| 2562 | (ifp->if_bytes == 0)); |
| 2563 | ASSERT((xfs_iext_get_ext(ifp, 0) == NULL) || |
| 2564 | (ifp->if_bytes > 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2565 | if ((iip->ili_format.ilf_fields & extflag[whichfork]) && |
| 2566 | (ifp->if_bytes > 0)) { |
| 2567 | ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) > 0); |
| 2568 | (void)xfs_iextents_copy(ip, (xfs_bmbt_rec_t *)cp, |
| 2569 | whichfork); |
| 2570 | } |
| 2571 | break; |
| 2572 | |
| 2573 | case XFS_DINODE_FMT_BTREE: |
| 2574 | if ((iip->ili_format.ilf_fields & brootflag[whichfork]) && |
| 2575 | (ifp->if_broot_bytes > 0)) { |
| 2576 | ASSERT(ifp->if_broot != NULL); |
| 2577 | ASSERT(ifp->if_broot_bytes <= |
| 2578 | (XFS_IFORK_SIZE(ip, whichfork) + |
| 2579 | XFS_BROOT_SIZE_ADJ)); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 2580 | xfs_bmbt_to_bmdr(mp, ifp->if_broot, ifp->if_broot_bytes, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2581 | (xfs_bmdr_block_t *)cp, |
| 2582 | XFS_DFORK_SIZE(dip, mp, whichfork)); |
| 2583 | } |
| 2584 | break; |
| 2585 | |
| 2586 | case XFS_DINODE_FMT_DEV: |
| 2587 | if (iip->ili_format.ilf_fields & XFS_ILOG_DEV) { |
| 2588 | ASSERT(whichfork == XFS_DATA_FORK); |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 2589 | xfs_dinode_put_rdev(dip, ip->i_df.if_u2.if_rdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2590 | } |
| 2591 | break; |
| 2592 | |
| 2593 | case XFS_DINODE_FMT_UUID: |
| 2594 | if (iip->ili_format.ilf_fields & XFS_ILOG_UUID) { |
| 2595 | ASSERT(whichfork == XFS_DATA_FORK); |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 2596 | memcpy(XFS_DFORK_DPTR(dip), |
| 2597 | &ip->i_df.if_u2.if_uuid, |
| 2598 | sizeof(uuid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2599 | } |
| 2600 | break; |
| 2601 | |
| 2602 | default: |
| 2603 | ASSERT(0); |
| 2604 | break; |
| 2605 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2606 | } |
| 2607 | |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2608 | STATIC int |
| 2609 | xfs_iflush_cluster( |
| 2610 | xfs_inode_t *ip, |
| 2611 | xfs_buf_t *bp) |
| 2612 | { |
| 2613 | xfs_mount_t *mp = ip->i_mount; |
Dave Chinner | 5017e97 | 2010-01-11 11:47:40 +0000 | [diff] [blame] | 2614 | struct xfs_perag *pag; |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2615 | unsigned long first_index, mask; |
David Chinner | c8f5f12 | 2008-05-20 11:30:15 +1000 | [diff] [blame] | 2616 | unsigned long inodes_per_cluster; |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2617 | int ilist_size; |
| 2618 | xfs_inode_t **ilist; |
| 2619 | xfs_inode_t *iq; |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2620 | int nr_found; |
| 2621 | int clcount = 0; |
| 2622 | int bufwasdelwri; |
| 2623 | int i; |
| 2624 | |
Dave Chinner | 5017e97 | 2010-01-11 11:47:40 +0000 | [diff] [blame] | 2625 | pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2626 | |
David Chinner | c8f5f12 | 2008-05-20 11:30:15 +1000 | [diff] [blame] | 2627 | inodes_per_cluster = XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog; |
| 2628 | ilist_size = inodes_per_cluster * sizeof(xfs_inode_t *); |
David Chinner | 49383b0 | 2008-05-19 16:29:34 +1000 | [diff] [blame] | 2629 | ilist = kmem_alloc(ilist_size, KM_MAYFAIL|KM_NOFS); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2630 | if (!ilist) |
Dave Chinner | 44b56e0 | 2010-01-11 11:47:43 +0000 | [diff] [blame] | 2631 | goto out_put; |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2632 | |
| 2633 | mask = ~(((XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog)) - 1); |
| 2634 | first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask; |
Dave Chinner | 1a3e8f3 | 2010-12-17 17:29:43 +1100 | [diff] [blame] | 2635 | rcu_read_lock(); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2636 | /* really need a gang lookup range call here */ |
| 2637 | nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)ilist, |
David Chinner | c8f5f12 | 2008-05-20 11:30:15 +1000 | [diff] [blame] | 2638 | first_index, inodes_per_cluster); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2639 | if (nr_found == 0) |
| 2640 | goto out_free; |
| 2641 | |
| 2642 | for (i = 0; i < nr_found; i++) { |
| 2643 | iq = ilist[i]; |
| 2644 | if (iq == ip) |
| 2645 | continue; |
Dave Chinner | 1a3e8f3 | 2010-12-17 17:29:43 +1100 | [diff] [blame] | 2646 | |
| 2647 | /* |
| 2648 | * because this is an RCU protected lookup, we could find a |
| 2649 | * recently freed or even reallocated inode during the lookup. |
| 2650 | * We need to check under the i_flags_lock for a valid inode |
| 2651 | * here. Skip it if it is not valid or the wrong inode. |
| 2652 | */ |
| 2653 | spin_lock(&ip->i_flags_lock); |
| 2654 | if (!ip->i_ino || |
| 2655 | (XFS_INO_TO_AGINO(mp, iq->i_ino) & mask) != first_index) { |
| 2656 | spin_unlock(&ip->i_flags_lock); |
| 2657 | continue; |
| 2658 | } |
| 2659 | spin_unlock(&ip->i_flags_lock); |
| 2660 | |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2661 | /* |
| 2662 | * Do an un-protected check to see if the inode is dirty and |
| 2663 | * is a candidate for flushing. These checks will be repeated |
| 2664 | * later after the appropriate locks are acquired. |
| 2665 | */ |
David Chinner | 3354040 | 2008-03-06 13:43:59 +1100 | [diff] [blame] | 2666 | if (xfs_inode_clean(iq) && xfs_ipincount(iq) == 0) |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2667 | continue; |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2668 | |
| 2669 | /* |
| 2670 | * Try to get locks. If any are unavailable or it is pinned, |
| 2671 | * then this inode cannot be flushed and is skipped. |
| 2672 | */ |
| 2673 | |
| 2674 | if (!xfs_ilock_nowait(iq, XFS_ILOCK_SHARED)) |
| 2675 | continue; |
| 2676 | if (!xfs_iflock_nowait(iq)) { |
| 2677 | xfs_iunlock(iq, XFS_ILOCK_SHARED); |
| 2678 | continue; |
| 2679 | } |
| 2680 | if (xfs_ipincount(iq)) { |
| 2681 | xfs_ifunlock(iq); |
| 2682 | xfs_iunlock(iq, XFS_ILOCK_SHARED); |
| 2683 | continue; |
| 2684 | } |
| 2685 | |
| 2686 | /* |
| 2687 | * arriving here means that this inode can be flushed. First |
| 2688 | * re-check that it's dirty before flushing. |
| 2689 | */ |
David Chinner | 3354040 | 2008-03-06 13:43:59 +1100 | [diff] [blame] | 2690 | if (!xfs_inode_clean(iq)) { |
| 2691 | int error; |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2692 | error = xfs_iflush_int(iq, bp); |
| 2693 | if (error) { |
| 2694 | xfs_iunlock(iq, XFS_ILOCK_SHARED); |
| 2695 | goto cluster_corrupt_out; |
| 2696 | } |
| 2697 | clcount++; |
| 2698 | } else { |
| 2699 | xfs_ifunlock(iq); |
| 2700 | } |
| 2701 | xfs_iunlock(iq, XFS_ILOCK_SHARED); |
| 2702 | } |
| 2703 | |
| 2704 | if (clcount) { |
| 2705 | XFS_STATS_INC(xs_icluster_flushcnt); |
| 2706 | XFS_STATS_ADD(xs_icluster_flushinode, clcount); |
| 2707 | } |
| 2708 | |
| 2709 | out_free: |
Dave Chinner | 1a3e8f3 | 2010-12-17 17:29:43 +1100 | [diff] [blame] | 2710 | rcu_read_unlock(); |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2711 | kmem_free(ilist); |
Dave Chinner | 44b56e0 | 2010-01-11 11:47:43 +0000 | [diff] [blame] | 2712 | out_put: |
| 2713 | xfs_perag_put(pag); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2714 | return 0; |
| 2715 | |
| 2716 | |
| 2717 | cluster_corrupt_out: |
| 2718 | /* |
| 2719 | * Corruption detected in the clustering loop. Invalidate the |
| 2720 | * inode buffer and shut down the filesystem. |
| 2721 | */ |
Dave Chinner | 1a3e8f3 | 2010-12-17 17:29:43 +1100 | [diff] [blame] | 2722 | rcu_read_unlock(); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2723 | /* |
| 2724 | * Clean up the buffer. If it was B_DELWRI, just release it -- |
| 2725 | * brelse can handle it with no problems. If not, shut down the |
| 2726 | * filesystem before releasing the buffer. |
| 2727 | */ |
| 2728 | bufwasdelwri = XFS_BUF_ISDELAYWRITE(bp); |
| 2729 | if (bufwasdelwri) |
| 2730 | xfs_buf_relse(bp); |
| 2731 | |
| 2732 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
| 2733 | |
| 2734 | if (!bufwasdelwri) { |
| 2735 | /* |
| 2736 | * Just like incore_relse: if we have b_iodone functions, |
| 2737 | * mark the buffer as an error and call them. Otherwise |
| 2738 | * mark it as stale and brelse. |
| 2739 | */ |
| 2740 | if (XFS_BUF_IODONE_FUNC(bp)) { |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2741 | XFS_BUF_UNDONE(bp); |
| 2742 | XFS_BUF_STALE(bp); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2743 | XFS_BUF_ERROR(bp,EIO); |
Christoph Hellwig | 1a1a3e9 | 2010-10-06 18:41:18 +0000 | [diff] [blame] | 2744 | xfs_buf_ioend(bp, 0); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2745 | } else { |
| 2746 | XFS_BUF_STALE(bp); |
| 2747 | xfs_buf_relse(bp); |
| 2748 | } |
| 2749 | } |
| 2750 | |
| 2751 | /* |
| 2752 | * Unlocks the flush lock |
| 2753 | */ |
| 2754 | xfs_iflush_abort(iq); |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2755 | kmem_free(ilist); |
Dave Chinner | 44b56e0 | 2010-01-11 11:47:43 +0000 | [diff] [blame] | 2756 | xfs_perag_put(pag); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2757 | return XFS_ERROR(EFSCORRUPTED); |
| 2758 | } |
| 2759 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2760 | /* |
| 2761 | * xfs_iflush() will write a modified inode's changes out to the |
| 2762 | * inode's on disk home. The caller must have the inode lock held |
David Chinner | c63942d | 2008-08-13 16:41:16 +1000 | [diff] [blame] | 2763 | * in at least shared mode and the inode flush completion must be |
| 2764 | * active as well. The inode lock will still be held upon return from |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2765 | * the call and the caller is free to unlock it. |
David Chinner | c63942d | 2008-08-13 16:41:16 +1000 | [diff] [blame] | 2766 | * The inode flush will be completed when the inode reaches the disk. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2767 | * The flags indicate how the inode's buffer should be written out. |
| 2768 | */ |
| 2769 | int |
| 2770 | xfs_iflush( |
| 2771 | xfs_inode_t *ip, |
| 2772 | uint flags) |
| 2773 | { |
| 2774 | xfs_inode_log_item_t *iip; |
| 2775 | xfs_buf_t *bp; |
| 2776 | xfs_dinode_t *dip; |
| 2777 | xfs_mount_t *mp; |
| 2778 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2779 | |
| 2780 | XFS_STATS_INC(xs_iflush_count); |
| 2781 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 2782 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
David Chinner | c63942d | 2008-08-13 16:41:16 +1000 | [diff] [blame] | 2783 | ASSERT(!completion_done(&ip->i_flush)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2784 | ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || |
| 2785 | ip->i_d.di_nextents > ip->i_df.if_ext_max); |
| 2786 | |
| 2787 | iip = ip->i_itemp; |
| 2788 | mp = ip->i_mount; |
| 2789 | |
| 2790 | /* |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2791 | * We can't flush the inode until it is unpinned, so wait for it if we |
| 2792 | * are allowed to block. We know noone new can pin it, because we are |
| 2793 | * holding the inode lock shared and you need to hold it exclusively to |
| 2794 | * pin the inode. |
| 2795 | * |
| 2796 | * If we are not allowed to block, force the log out asynchronously so |
| 2797 | * that when we come back the inode will be unpinned. If other inodes |
| 2798 | * in the same cluster are dirty, they will probably write the inode |
| 2799 | * out for us if they occur after the log force completes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2800 | */ |
Dave Chinner | c854363 | 2010-02-06 12:39:36 +1100 | [diff] [blame] | 2801 | if (!(flags & SYNC_WAIT) && xfs_ipincount(ip)) { |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2802 | xfs_iunpin_nowait(ip); |
| 2803 | xfs_ifunlock(ip); |
| 2804 | return EAGAIN; |
| 2805 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2806 | xfs_iunpin_wait(ip); |
| 2807 | |
| 2808 | /* |
Dave Chinner | 4b6a468 | 2010-01-11 11:45:21 +0000 | [diff] [blame] | 2809 | * For stale inodes we cannot rely on the backing buffer remaining |
| 2810 | * stale in cache for the remaining life of the stale inode and so |
| 2811 | * xfs_itobp() below may give us a buffer that no longer contains |
| 2812 | * inodes below. We have to check this after ensuring the inode is |
| 2813 | * unpinned so that it is safe to reclaim the stale inode after the |
| 2814 | * flush call. |
| 2815 | */ |
| 2816 | if (xfs_iflags_test(ip, XFS_ISTALE)) { |
| 2817 | xfs_ifunlock(ip); |
| 2818 | return 0; |
| 2819 | } |
| 2820 | |
| 2821 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2822 | * This may have been unpinned because the filesystem is shutting |
| 2823 | * down forcibly. If that's the case we must not write this inode |
| 2824 | * to disk, because the log record didn't make it to disk! |
| 2825 | */ |
| 2826 | if (XFS_FORCED_SHUTDOWN(mp)) { |
| 2827 | ip->i_update_core = 0; |
| 2828 | if (iip) |
| 2829 | iip->ili_format.ilf_fields = 0; |
| 2830 | xfs_ifunlock(ip); |
| 2831 | return XFS_ERROR(EIO); |
| 2832 | } |
| 2833 | |
| 2834 | /* |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2835 | * Get the buffer containing the on-disk inode. |
| 2836 | */ |
Christoph Hellwig | 76d8b27 | 2008-11-28 14:23:40 +1100 | [diff] [blame] | 2837 | error = xfs_itobp(mp, NULL, ip, &dip, &bp, |
Dave Chinner | c854363 | 2010-02-06 12:39:36 +1100 | [diff] [blame] | 2838 | (flags & SYNC_WAIT) ? XBF_LOCK : XBF_TRYLOCK); |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2839 | if (error || !bp) { |
| 2840 | xfs_ifunlock(ip); |
| 2841 | return error; |
| 2842 | } |
| 2843 | |
| 2844 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2845 | * First flush out the inode that xfs_iflush was called with. |
| 2846 | */ |
| 2847 | error = xfs_iflush_int(ip, bp); |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2848 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2849 | goto corrupt_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2850 | |
| 2851 | /* |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2852 | * If the buffer is pinned then push on the log now so we won't |
| 2853 | * get stuck waiting in the write for too long. |
| 2854 | */ |
| 2855 | if (XFS_BUF_ISPINNED(bp)) |
Christoph Hellwig | a14a348 | 2010-01-19 09:56:46 +0000 | [diff] [blame] | 2856 | xfs_log_force(mp, 0); |
David Chinner | a3f74ff | 2008-03-06 13:43:42 +1100 | [diff] [blame] | 2857 | |
| 2858 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2859 | * inode clustering: |
| 2860 | * see if other inodes can be gathered into this write |
| 2861 | */ |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2862 | error = xfs_iflush_cluster(ip, bp); |
| 2863 | if (error) |
| 2864 | goto cluster_corrupt_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2865 | |
Dave Chinner | c854363 | 2010-02-06 12:39:36 +1100 | [diff] [blame] | 2866 | if (flags & SYNC_WAIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2867 | error = xfs_bwrite(mp, bp); |
Dave Chinner | c854363 | 2010-02-06 12:39:36 +1100 | [diff] [blame] | 2868 | else |
| 2869 | xfs_bdwrite(mp, bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2870 | return error; |
| 2871 | |
| 2872 | corrupt_out: |
| 2873 | xfs_buf_relse(bp); |
Nathan Scott | 7d04a33 | 2006-06-09 14:58:38 +1000 | [diff] [blame] | 2874 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2875 | cluster_corrupt_out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2876 | /* |
| 2877 | * Unlocks the flush lock |
| 2878 | */ |
David Chinner | bad5584 | 2008-03-06 13:43:49 +1100 | [diff] [blame] | 2879 | xfs_iflush_abort(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2880 | return XFS_ERROR(EFSCORRUPTED); |
| 2881 | } |
| 2882 | |
| 2883 | |
| 2884 | STATIC int |
| 2885 | xfs_iflush_int( |
| 2886 | xfs_inode_t *ip, |
| 2887 | xfs_buf_t *bp) |
| 2888 | { |
| 2889 | xfs_inode_log_item_t *iip; |
| 2890 | xfs_dinode_t *dip; |
| 2891 | xfs_mount_t *mp; |
| 2892 | #ifdef XFS_TRANS_DEBUG |
| 2893 | int first; |
| 2894 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2895 | |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 2896 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
David Chinner | c63942d | 2008-08-13 16:41:16 +1000 | [diff] [blame] | 2897 | ASSERT(!completion_done(&ip->i_flush)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2898 | ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || |
| 2899 | ip->i_d.di_nextents > ip->i_df.if_ext_max); |
| 2900 | |
| 2901 | iip = ip->i_itemp; |
| 2902 | mp = ip->i_mount; |
| 2903 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2904 | /* set *dip = inode's place in the buffer */ |
Christoph Hellwig | 92bfc6e | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 2905 | dip = (xfs_dinode_t *)xfs_buf_offset(bp, ip->i_imap.im_boffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2906 | |
| 2907 | /* |
| 2908 | * Clear i_update_core before copying out the data. |
| 2909 | * This is for coordination with our timestamp updates |
| 2910 | * that don't hold the inode lock. They will always |
| 2911 | * update the timestamps BEFORE setting i_update_core, |
| 2912 | * so if we clear i_update_core after they set it we |
| 2913 | * are guaranteed to see their updates to the timestamps. |
| 2914 | * I believe that this depends on strongly ordered memory |
| 2915 | * semantics, but we have that. We use the SYNCHRONIZE |
| 2916 | * macro to make sure that the compiler does not reorder |
| 2917 | * the i_update_core access below the data copy below. |
| 2918 | */ |
| 2919 | ip->i_update_core = 0; |
| 2920 | SYNCHRONIZE(); |
| 2921 | |
Christoph Hellwig | 42fe2b1 | 2006-01-11 15:35:17 +1100 | [diff] [blame] | 2922 | /* |
Christoph Hellwig | f9581b1 | 2009-10-06 20:29:26 +0000 | [diff] [blame] | 2923 | * Make sure to get the latest timestamps from the Linux inode. |
Christoph Hellwig | 42fe2b1 | 2006-01-11 15:35:17 +1100 | [diff] [blame] | 2924 | */ |
Christoph Hellwig | f9581b1 | 2009-10-06 20:29:26 +0000 | [diff] [blame] | 2925 | xfs_synchronize_times(ip); |
Christoph Hellwig | 42fe2b1 | 2006-01-11 15:35:17 +1100 | [diff] [blame] | 2926 | |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 2927 | if (XFS_TEST_ERROR(be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2928 | mp, XFS_ERRTAG_IFLUSH_1, XFS_RANDOM_IFLUSH_1)) { |
Dave Chinner | 6a19d93 | 2011-03-07 10:02:35 +1100 | [diff] [blame] | 2929 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
| 2930 | "%s: Bad inode %Lu magic number 0x%x, ptr 0x%p", |
| 2931 | __func__, ip->i_ino, be16_to_cpu(dip->di_magic), dip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2932 | goto corrupt_out; |
| 2933 | } |
| 2934 | if (XFS_TEST_ERROR(ip->i_d.di_magic != XFS_DINODE_MAGIC, |
| 2935 | mp, XFS_ERRTAG_IFLUSH_2, XFS_RANDOM_IFLUSH_2)) { |
Dave Chinner | 6a19d93 | 2011-03-07 10:02:35 +1100 | [diff] [blame] | 2936 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
| 2937 | "%s: Bad inode %Lu, ptr 0x%p, magic number 0x%x", |
| 2938 | __func__, ip->i_ino, ip, ip->i_d.di_magic); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2939 | goto corrupt_out; |
| 2940 | } |
| 2941 | if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) { |
| 2942 | if (XFS_TEST_ERROR( |
| 2943 | (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) && |
| 2944 | (ip->i_d.di_format != XFS_DINODE_FMT_BTREE), |
| 2945 | mp, XFS_ERRTAG_IFLUSH_3, XFS_RANDOM_IFLUSH_3)) { |
Dave Chinner | 6a19d93 | 2011-03-07 10:02:35 +1100 | [diff] [blame] | 2946 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
| 2947 | "%s: Bad regular inode %Lu, ptr 0x%p", |
| 2948 | __func__, ip->i_ino, ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2949 | goto corrupt_out; |
| 2950 | } |
| 2951 | } else if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) { |
| 2952 | if (XFS_TEST_ERROR( |
| 2953 | (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) && |
| 2954 | (ip->i_d.di_format != XFS_DINODE_FMT_BTREE) && |
| 2955 | (ip->i_d.di_format != XFS_DINODE_FMT_LOCAL), |
| 2956 | mp, XFS_ERRTAG_IFLUSH_4, XFS_RANDOM_IFLUSH_4)) { |
Dave Chinner | 6a19d93 | 2011-03-07 10:02:35 +1100 | [diff] [blame] | 2957 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
| 2958 | "%s: Bad directory inode %Lu, ptr 0x%p", |
| 2959 | __func__, ip->i_ino, ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2960 | goto corrupt_out; |
| 2961 | } |
| 2962 | } |
| 2963 | if (XFS_TEST_ERROR(ip->i_d.di_nextents + ip->i_d.di_anextents > |
| 2964 | ip->i_d.di_nblocks, mp, XFS_ERRTAG_IFLUSH_5, |
| 2965 | XFS_RANDOM_IFLUSH_5)) { |
Dave Chinner | 6a19d93 | 2011-03-07 10:02:35 +1100 | [diff] [blame] | 2966 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
| 2967 | "%s: detected corrupt incore inode %Lu, " |
| 2968 | "total extents = %d, nblocks = %Ld, ptr 0x%p", |
| 2969 | __func__, ip->i_ino, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2970 | ip->i_d.di_nextents + ip->i_d.di_anextents, |
Dave Chinner | 6a19d93 | 2011-03-07 10:02:35 +1100 | [diff] [blame] | 2971 | ip->i_d.di_nblocks, ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2972 | goto corrupt_out; |
| 2973 | } |
| 2974 | if (XFS_TEST_ERROR(ip->i_d.di_forkoff > mp->m_sb.sb_inodesize, |
| 2975 | mp, XFS_ERRTAG_IFLUSH_6, XFS_RANDOM_IFLUSH_6)) { |
Dave Chinner | 6a19d93 | 2011-03-07 10:02:35 +1100 | [diff] [blame] | 2976 | xfs_alert_tag(mp, XFS_PTAG_IFLUSH, |
| 2977 | "%s: bad inode %Lu, forkoff 0x%x, ptr 0x%p", |
| 2978 | __func__, ip->i_ino, ip->i_d.di_forkoff, ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2979 | goto corrupt_out; |
| 2980 | } |
| 2981 | /* |
| 2982 | * bump the flush iteration count, used to detect flushes which |
| 2983 | * postdate a log record during recovery. |
| 2984 | */ |
| 2985 | |
| 2986 | ip->i_d.di_flushiter++; |
| 2987 | |
| 2988 | /* |
| 2989 | * Copy the dirty parts of the inode into the on-disk |
| 2990 | * inode. We always copy out the core of the inode, |
| 2991 | * because if the inode is dirty at all the core must |
| 2992 | * be. |
| 2993 | */ |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 2994 | xfs_dinode_to_disk(dip, &ip->i_d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2995 | |
| 2996 | /* Wrap, we never let the log put out DI_MAX_FLUSH */ |
| 2997 | if (ip->i_d.di_flushiter == DI_MAX_FLUSH) |
| 2998 | ip->i_d.di_flushiter = 0; |
| 2999 | |
| 3000 | /* |
| 3001 | * If this is really an old format inode and the superblock version |
| 3002 | * has not been updated to support only new format inodes, then |
| 3003 | * convert back to the old inode format. If the superblock version |
| 3004 | * has been updated, then make the conversion permanent. |
| 3005 | */ |
Christoph Hellwig | 51ce16d | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 3006 | ASSERT(ip->i_d.di_version == 1 || xfs_sb_version_hasnlink(&mp->m_sb)); |
| 3007 | if (ip->i_d.di_version == 1) { |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 3008 | if (!xfs_sb_version_hasnlink(&mp->m_sb)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3009 | /* |
| 3010 | * Convert it back. |
| 3011 | */ |
| 3012 | ASSERT(ip->i_d.di_nlink <= XFS_MAXLINK_1); |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 3013 | dip->di_onlink = cpu_to_be16(ip->i_d.di_nlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3014 | } else { |
| 3015 | /* |
| 3016 | * The superblock version has already been bumped, |
| 3017 | * so just make the conversion to the new inode |
| 3018 | * format permanent. |
| 3019 | */ |
Christoph Hellwig | 51ce16d | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 3020 | ip->i_d.di_version = 2; |
| 3021 | dip->di_version = 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3022 | ip->i_d.di_onlink = 0; |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 3023 | dip->di_onlink = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3024 | memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad)); |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 3025 | memset(&(dip->di_pad[0]), 0, |
| 3026 | sizeof(dip->di_pad)); |
Arkadiusz Mi?kiewicz | 6743099 | 2010-09-26 06:10:18 +0000 | [diff] [blame] | 3027 | ASSERT(xfs_get_projid(ip) == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3028 | } |
| 3029 | } |
| 3030 | |
David Chinner | e4ac967 | 2008-04-10 12:23:58 +1000 | [diff] [blame] | 3031 | xfs_iflush_fork(ip, dip, iip, XFS_DATA_FORK, bp); |
| 3032 | if (XFS_IFORK_Q(ip)) |
| 3033 | xfs_iflush_fork(ip, dip, iip, XFS_ATTR_FORK, bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3034 | xfs_inobp_check(mp, bp); |
| 3035 | |
| 3036 | /* |
| 3037 | * We've recorded everything logged in the inode, so we'd |
| 3038 | * like to clear the ilf_fields bits so we don't log and |
| 3039 | * flush things unnecessarily. However, we can't stop |
| 3040 | * logging all this information until the data we've copied |
| 3041 | * into the disk buffer is written to disk. If we did we might |
| 3042 | * overwrite the copy of the inode in the log with all the |
| 3043 | * data after re-logging only part of it, and in the face of |
| 3044 | * a crash we wouldn't have all the data we need to recover. |
| 3045 | * |
| 3046 | * What we do is move the bits to the ili_last_fields field. |
| 3047 | * When logging the inode, these bits are moved back to the |
| 3048 | * ilf_fields field. In the xfs_iflush_done() routine we |
| 3049 | * clear ili_last_fields, since we know that the information |
| 3050 | * those bits represent is permanently on disk. As long as |
| 3051 | * the flush completes before the inode is logged again, then |
| 3052 | * both ilf_fields and ili_last_fields will be cleared. |
| 3053 | * |
| 3054 | * We can play with the ilf_fields bits here, because the inode |
| 3055 | * lock must be held exclusively in order to set bits there |
| 3056 | * and the flush lock protects the ili_last_fields bits. |
| 3057 | * Set ili_logged so the flush done |
| 3058 | * routine can tell whether or not to look in the AIL. |
| 3059 | * Also, store the current LSN of the inode so that we can tell |
| 3060 | * whether the item has moved in the AIL from xfs_iflush_done(). |
| 3061 | * In order to read the lsn we need the AIL lock, because |
| 3062 | * it is a 64 bit value that cannot be read atomically. |
| 3063 | */ |
| 3064 | if (iip != NULL && iip->ili_format.ilf_fields != 0) { |
| 3065 | iip->ili_last_fields = iip->ili_format.ilf_fields; |
| 3066 | iip->ili_format.ilf_fields = 0; |
| 3067 | iip->ili_logged = 1; |
| 3068 | |
David Chinner | 7b2e2a3 | 2008-10-30 17:39:12 +1100 | [diff] [blame] | 3069 | xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn, |
| 3070 | &iip->ili_item.li_lsn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3071 | |
| 3072 | /* |
| 3073 | * Attach the function xfs_iflush_done to the inode's |
| 3074 | * buffer. This will remove the inode from the AIL |
| 3075 | * and unlock the inode's flush lock when the inode is |
| 3076 | * completely written to disk. |
| 3077 | */ |
Christoph Hellwig | ca30b2a | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 3078 | xfs_buf_attach_iodone(bp, xfs_iflush_done, &iip->ili_item); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3079 | |
| 3080 | ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL); |
| 3081 | ASSERT(XFS_BUF_IODONE_FUNC(bp) != NULL); |
| 3082 | } else { |
| 3083 | /* |
| 3084 | * We're flushing an inode which is not in the AIL and has |
| 3085 | * not been logged but has i_update_core set. For this |
| 3086 | * case we can use a B_DELWRI flush and immediately drop |
| 3087 | * the inode flush lock because we can avoid the whole |
| 3088 | * AIL state thing. It's OK to drop the flush lock now, |
| 3089 | * because we've already locked the buffer and to do anything |
| 3090 | * you really need both. |
| 3091 | */ |
| 3092 | if (iip != NULL) { |
| 3093 | ASSERT(iip->ili_logged == 0); |
| 3094 | ASSERT(iip->ili_last_fields == 0); |
| 3095 | ASSERT((iip->ili_item.li_flags & XFS_LI_IN_AIL) == 0); |
| 3096 | } |
| 3097 | xfs_ifunlock(ip); |
| 3098 | } |
| 3099 | |
| 3100 | return 0; |
| 3101 | |
| 3102 | corrupt_out: |
| 3103 | return XFS_ERROR(EFSCORRUPTED); |
| 3104 | } |
| 3105 | |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3106 | /* |
| 3107 | * Return a pointer to the extent record at file index idx. |
| 3108 | */ |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 3109 | xfs_bmbt_rec_host_t * |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3110 | xfs_iext_get_ext( |
| 3111 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3112 | xfs_extnum_t idx) /* index of target extent */ |
| 3113 | { |
| 3114 | ASSERT(idx >= 0); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3115 | if ((ifp->if_flags & XFS_IFEXTIREC) && (idx == 0)) { |
| 3116 | return ifp->if_u1.if_ext_irec->er_extbuf; |
| 3117 | } else if (ifp->if_flags & XFS_IFEXTIREC) { |
| 3118 | xfs_ext_irec_t *erp; /* irec pointer */ |
| 3119 | int erp_idx = 0; /* irec index */ |
| 3120 | xfs_extnum_t page_idx = idx; /* ext index in target list */ |
| 3121 | |
| 3122 | erp = xfs_iext_idx_to_irec(ifp, &page_idx, &erp_idx, 0); |
| 3123 | return &erp->er_extbuf[page_idx]; |
| 3124 | } else if (ifp->if_bytes) { |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3125 | return &ifp->if_u1.if_extents[idx]; |
| 3126 | } else { |
| 3127 | return NULL; |
| 3128 | } |
| 3129 | } |
| 3130 | |
| 3131 | /* |
| 3132 | * Insert new item(s) into the extent records for incore inode |
| 3133 | * fork 'ifp'. 'count' new items are inserted at index 'idx'. |
| 3134 | */ |
| 3135 | void |
| 3136 | xfs_iext_insert( |
Christoph Hellwig | 6ef3554 | 2009-11-25 00:00:21 +0000 | [diff] [blame] | 3137 | xfs_inode_t *ip, /* incore inode pointer */ |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3138 | xfs_extnum_t idx, /* starting index of new items */ |
| 3139 | xfs_extnum_t count, /* number of inserted items */ |
Christoph Hellwig | 6ef3554 | 2009-11-25 00:00:21 +0000 | [diff] [blame] | 3140 | xfs_bmbt_irec_t *new, /* items to insert */ |
| 3141 | int state) /* type of extent conversion */ |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3142 | { |
Christoph Hellwig | 6ef3554 | 2009-11-25 00:00:21 +0000 | [diff] [blame] | 3143 | xfs_ifork_t *ifp = (state & BMAP_ATTRFORK) ? ip->i_afp : &ip->i_df; |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3144 | xfs_extnum_t i; /* extent record index */ |
| 3145 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 3146 | trace_xfs_iext_insert(ip, idx, new, state, _RET_IP_); |
| 3147 | |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3148 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); |
| 3149 | xfs_iext_add(ifp, idx, count); |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 3150 | for (i = idx; i < idx + count; i++, new++) |
| 3151 | xfs_bmbt_set_all(xfs_iext_get_ext(ifp, i), new); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3152 | } |
| 3153 | |
| 3154 | /* |
| 3155 | * This is called when the amount of space required for incore file |
| 3156 | * extents needs to be increased. The ext_diff parameter stores the |
| 3157 | * number of new extents being added and the idx parameter contains |
| 3158 | * the extent index where the new extents will be added. If the new |
| 3159 | * extents are being appended, then we just need to (re)allocate and |
| 3160 | * initialize the space. Otherwise, if the new extents are being |
| 3161 | * inserted into the middle of the existing entries, a bit more work |
| 3162 | * is required to make room for the new extents to be inserted. The |
| 3163 | * caller is responsible for filling in the new extent entries upon |
| 3164 | * return. |
| 3165 | */ |
| 3166 | void |
| 3167 | xfs_iext_add( |
| 3168 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3169 | xfs_extnum_t idx, /* index to begin adding exts */ |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 3170 | int ext_diff) /* number of extents to add */ |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3171 | { |
| 3172 | int byte_diff; /* new bytes being added */ |
| 3173 | int new_size; /* size of extents after adding */ |
| 3174 | xfs_extnum_t nextents; /* number of extents in file */ |
| 3175 | |
| 3176 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 3177 | ASSERT((idx >= 0) && (idx <= nextents)); |
| 3178 | byte_diff = ext_diff * sizeof(xfs_bmbt_rec_t); |
| 3179 | new_size = ifp->if_bytes + byte_diff; |
| 3180 | /* |
| 3181 | * If the new number of extents (nextents + ext_diff) |
| 3182 | * fits inside the inode, then continue to use the inline |
| 3183 | * extent buffer. |
| 3184 | */ |
| 3185 | if (nextents + ext_diff <= XFS_INLINE_EXTS) { |
| 3186 | if (idx < nextents) { |
| 3187 | memmove(&ifp->if_u2.if_inline_ext[idx + ext_diff], |
| 3188 | &ifp->if_u2.if_inline_ext[idx], |
| 3189 | (nextents - idx) * sizeof(xfs_bmbt_rec_t)); |
| 3190 | memset(&ifp->if_u2.if_inline_ext[idx], 0, byte_diff); |
| 3191 | } |
| 3192 | ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext; |
| 3193 | ifp->if_real_bytes = 0; |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3194 | ifp->if_lastex = nextents + ext_diff; |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3195 | } |
| 3196 | /* |
| 3197 | * Otherwise use a linear (direct) extent list. |
| 3198 | * If the extents are currently inside the inode, |
| 3199 | * xfs_iext_realloc_direct will switch us from |
| 3200 | * inline to direct extent allocation mode. |
| 3201 | */ |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3202 | else if (nextents + ext_diff <= XFS_LINEAR_EXTS) { |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3203 | xfs_iext_realloc_direct(ifp, new_size); |
| 3204 | if (idx < nextents) { |
| 3205 | memmove(&ifp->if_u1.if_extents[idx + ext_diff], |
| 3206 | &ifp->if_u1.if_extents[idx], |
| 3207 | (nextents - idx) * sizeof(xfs_bmbt_rec_t)); |
| 3208 | memset(&ifp->if_u1.if_extents[idx], 0, byte_diff); |
| 3209 | } |
| 3210 | } |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3211 | /* Indirection array */ |
| 3212 | else { |
| 3213 | xfs_ext_irec_t *erp; |
| 3214 | int erp_idx = 0; |
| 3215 | int page_idx = idx; |
| 3216 | |
| 3217 | ASSERT(nextents + ext_diff > XFS_LINEAR_EXTS); |
| 3218 | if (ifp->if_flags & XFS_IFEXTIREC) { |
| 3219 | erp = xfs_iext_idx_to_irec(ifp, &page_idx, &erp_idx, 1); |
| 3220 | } else { |
| 3221 | xfs_iext_irec_init(ifp); |
| 3222 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 3223 | erp = ifp->if_u1.if_ext_irec; |
| 3224 | } |
| 3225 | /* Extents fit in target extent page */ |
| 3226 | if (erp && erp->er_extcount + ext_diff <= XFS_LINEAR_EXTS) { |
| 3227 | if (page_idx < erp->er_extcount) { |
| 3228 | memmove(&erp->er_extbuf[page_idx + ext_diff], |
| 3229 | &erp->er_extbuf[page_idx], |
| 3230 | (erp->er_extcount - page_idx) * |
| 3231 | sizeof(xfs_bmbt_rec_t)); |
| 3232 | memset(&erp->er_extbuf[page_idx], 0, byte_diff); |
| 3233 | } |
| 3234 | erp->er_extcount += ext_diff; |
| 3235 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, ext_diff); |
| 3236 | } |
| 3237 | /* Insert a new extent page */ |
| 3238 | else if (erp) { |
| 3239 | xfs_iext_add_indirect_multi(ifp, |
| 3240 | erp_idx, page_idx, ext_diff); |
| 3241 | } |
| 3242 | /* |
| 3243 | * If extent(s) are being appended to the last page in |
| 3244 | * the indirection array and the new extent(s) don't fit |
| 3245 | * in the page, then erp is NULL and erp_idx is set to |
| 3246 | * the next index needed in the indirection array. |
| 3247 | */ |
| 3248 | else { |
| 3249 | int count = ext_diff; |
| 3250 | |
| 3251 | while (count) { |
| 3252 | erp = xfs_iext_irec_new(ifp, erp_idx); |
| 3253 | erp->er_extcount = count; |
| 3254 | count -= MIN(count, (int)XFS_LINEAR_EXTS); |
| 3255 | if (count) { |
| 3256 | erp_idx++; |
| 3257 | } |
| 3258 | } |
| 3259 | } |
| 3260 | } |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3261 | ifp->if_bytes = new_size; |
| 3262 | } |
| 3263 | |
| 3264 | /* |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3265 | * This is called when incore extents are being added to the indirection |
| 3266 | * array and the new extents do not fit in the target extent list. The |
| 3267 | * erp_idx parameter contains the irec index for the target extent list |
| 3268 | * in the indirection array, and the idx parameter contains the extent |
| 3269 | * index within the list. The number of extents being added is stored |
| 3270 | * in the count parameter. |
| 3271 | * |
| 3272 | * |-------| |-------| |
| 3273 | * | | | | idx - number of extents before idx |
| 3274 | * | idx | | count | |
| 3275 | * | | | | count - number of extents being inserted at idx |
| 3276 | * |-------| |-------| |
| 3277 | * | count | | nex2 | nex2 - number of extents after idx + count |
| 3278 | * |-------| |-------| |
| 3279 | */ |
| 3280 | void |
| 3281 | xfs_iext_add_indirect_multi( |
| 3282 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3283 | int erp_idx, /* target extent irec index */ |
| 3284 | xfs_extnum_t idx, /* index within target list */ |
| 3285 | int count) /* new extents being added */ |
| 3286 | { |
| 3287 | int byte_diff; /* new bytes being added */ |
| 3288 | xfs_ext_irec_t *erp; /* pointer to irec entry */ |
| 3289 | xfs_extnum_t ext_diff; /* number of extents to add */ |
| 3290 | xfs_extnum_t ext_cnt; /* new extents still needed */ |
| 3291 | xfs_extnum_t nex2; /* extents after idx + count */ |
| 3292 | xfs_bmbt_rec_t *nex2_ep = NULL; /* temp list for nex2 extents */ |
| 3293 | int nlists; /* number of irec's (lists) */ |
| 3294 | |
| 3295 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 3296 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; |
| 3297 | nex2 = erp->er_extcount - idx; |
| 3298 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 3299 | |
| 3300 | /* |
| 3301 | * Save second part of target extent list |
| 3302 | * (all extents past */ |
| 3303 | if (nex2) { |
| 3304 | byte_diff = nex2 * sizeof(xfs_bmbt_rec_t); |
David Chinner | 6785073 | 2008-08-13 16:02:51 +1000 | [diff] [blame] | 3305 | nex2_ep = (xfs_bmbt_rec_t *) kmem_alloc(byte_diff, KM_NOFS); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3306 | memmove(nex2_ep, &erp->er_extbuf[idx], byte_diff); |
| 3307 | erp->er_extcount -= nex2; |
| 3308 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, -nex2); |
| 3309 | memset(&erp->er_extbuf[idx], 0, byte_diff); |
| 3310 | } |
| 3311 | |
| 3312 | /* |
| 3313 | * Add the new extents to the end of the target |
| 3314 | * list, then allocate new irec record(s) and |
| 3315 | * extent buffer(s) as needed to store the rest |
| 3316 | * of the new extents. |
| 3317 | */ |
| 3318 | ext_cnt = count; |
| 3319 | ext_diff = MIN(ext_cnt, (int)XFS_LINEAR_EXTS - erp->er_extcount); |
| 3320 | if (ext_diff) { |
| 3321 | erp->er_extcount += ext_diff; |
| 3322 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, ext_diff); |
| 3323 | ext_cnt -= ext_diff; |
| 3324 | } |
| 3325 | while (ext_cnt) { |
| 3326 | erp_idx++; |
| 3327 | erp = xfs_iext_irec_new(ifp, erp_idx); |
| 3328 | ext_diff = MIN(ext_cnt, (int)XFS_LINEAR_EXTS); |
| 3329 | erp->er_extcount = ext_diff; |
| 3330 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, ext_diff); |
| 3331 | ext_cnt -= ext_diff; |
| 3332 | } |
| 3333 | |
| 3334 | /* Add nex2 extents back to indirection array */ |
| 3335 | if (nex2) { |
| 3336 | xfs_extnum_t ext_avail; |
| 3337 | int i; |
| 3338 | |
| 3339 | byte_diff = nex2 * sizeof(xfs_bmbt_rec_t); |
| 3340 | ext_avail = XFS_LINEAR_EXTS - erp->er_extcount; |
| 3341 | i = 0; |
| 3342 | /* |
| 3343 | * If nex2 extents fit in the current page, append |
| 3344 | * nex2_ep after the new extents. |
| 3345 | */ |
| 3346 | if (nex2 <= ext_avail) { |
| 3347 | i = erp->er_extcount; |
| 3348 | } |
| 3349 | /* |
| 3350 | * Otherwise, check if space is available in the |
| 3351 | * next page. |
| 3352 | */ |
| 3353 | else if ((erp_idx < nlists - 1) && |
| 3354 | (nex2 <= (ext_avail = XFS_LINEAR_EXTS - |
| 3355 | ifp->if_u1.if_ext_irec[erp_idx+1].er_extcount))) { |
| 3356 | erp_idx++; |
| 3357 | erp++; |
| 3358 | /* Create a hole for nex2 extents */ |
| 3359 | memmove(&erp->er_extbuf[nex2], erp->er_extbuf, |
| 3360 | erp->er_extcount * sizeof(xfs_bmbt_rec_t)); |
| 3361 | } |
| 3362 | /* |
| 3363 | * Final choice, create a new extent page for |
| 3364 | * nex2 extents. |
| 3365 | */ |
| 3366 | else { |
| 3367 | erp_idx++; |
| 3368 | erp = xfs_iext_irec_new(ifp, erp_idx); |
| 3369 | } |
| 3370 | memmove(&erp->er_extbuf[i], nex2_ep, byte_diff); |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 3371 | kmem_free(nex2_ep); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3372 | erp->er_extcount += nex2; |
| 3373 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, nex2); |
| 3374 | } |
| 3375 | } |
| 3376 | |
| 3377 | /* |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3378 | * This is called when the amount of space required for incore file |
| 3379 | * extents needs to be decreased. The ext_diff parameter stores the |
| 3380 | * number of extents to be removed and the idx parameter contains |
| 3381 | * the extent index where the extents will be removed from. |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3382 | * |
| 3383 | * If the amount of space needed has decreased below the linear |
| 3384 | * limit, XFS_IEXT_BUFSZ, then switch to using the contiguous |
| 3385 | * extent array. Otherwise, use kmem_realloc() to adjust the |
| 3386 | * size to what is needed. |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3387 | */ |
| 3388 | void |
| 3389 | xfs_iext_remove( |
Christoph Hellwig | 6ef3554 | 2009-11-25 00:00:21 +0000 | [diff] [blame] | 3390 | xfs_inode_t *ip, /* incore inode pointer */ |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3391 | xfs_extnum_t idx, /* index to begin removing exts */ |
Christoph Hellwig | 6ef3554 | 2009-11-25 00:00:21 +0000 | [diff] [blame] | 3392 | int ext_diff, /* number of extents to remove */ |
| 3393 | int state) /* type of extent conversion */ |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3394 | { |
Christoph Hellwig | 6ef3554 | 2009-11-25 00:00:21 +0000 | [diff] [blame] | 3395 | xfs_ifork_t *ifp = (state & BMAP_ATTRFORK) ? ip->i_afp : &ip->i_df; |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3396 | xfs_extnum_t nextents; /* number of extents in file */ |
| 3397 | int new_size; /* size of extents after removal */ |
| 3398 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 3399 | trace_xfs_iext_remove(ip, idx, state, _RET_IP_); |
| 3400 | |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3401 | ASSERT(ext_diff > 0); |
| 3402 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 3403 | new_size = (nextents - ext_diff) * sizeof(xfs_bmbt_rec_t); |
| 3404 | |
| 3405 | if (new_size == 0) { |
| 3406 | xfs_iext_destroy(ifp); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3407 | } else if (ifp->if_flags & XFS_IFEXTIREC) { |
| 3408 | xfs_iext_remove_indirect(ifp, idx, ext_diff); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3409 | } else if (ifp->if_real_bytes) { |
| 3410 | xfs_iext_remove_direct(ifp, idx, ext_diff); |
| 3411 | } else { |
| 3412 | xfs_iext_remove_inline(ifp, idx, ext_diff); |
| 3413 | } |
| 3414 | ifp->if_bytes = new_size; |
| 3415 | } |
| 3416 | |
| 3417 | /* |
| 3418 | * This removes ext_diff extents from the inline buffer, beginning |
| 3419 | * at extent index idx. |
| 3420 | */ |
| 3421 | void |
| 3422 | xfs_iext_remove_inline( |
| 3423 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3424 | xfs_extnum_t idx, /* index to begin removing exts */ |
| 3425 | int ext_diff) /* number of extents to remove */ |
| 3426 | { |
| 3427 | int nextents; /* number of extents in file */ |
| 3428 | |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3429 | ASSERT(!(ifp->if_flags & XFS_IFEXTIREC)); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3430 | ASSERT(idx < XFS_INLINE_EXTS); |
| 3431 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 3432 | ASSERT(((nextents - ext_diff) > 0) && |
| 3433 | (nextents - ext_diff) < XFS_INLINE_EXTS); |
| 3434 | |
| 3435 | if (idx + ext_diff < nextents) { |
| 3436 | memmove(&ifp->if_u2.if_inline_ext[idx], |
| 3437 | &ifp->if_u2.if_inline_ext[idx + ext_diff], |
| 3438 | (nextents - (idx + ext_diff)) * |
| 3439 | sizeof(xfs_bmbt_rec_t)); |
| 3440 | memset(&ifp->if_u2.if_inline_ext[nextents - ext_diff], |
| 3441 | 0, ext_diff * sizeof(xfs_bmbt_rec_t)); |
| 3442 | } else { |
| 3443 | memset(&ifp->if_u2.if_inline_ext[idx], 0, |
| 3444 | ext_diff * sizeof(xfs_bmbt_rec_t)); |
| 3445 | } |
| 3446 | } |
| 3447 | |
| 3448 | /* |
| 3449 | * This removes ext_diff extents from a linear (direct) extent list, |
| 3450 | * beginning at extent index idx. If the extents are being removed |
| 3451 | * from the end of the list (ie. truncate) then we just need to re- |
| 3452 | * allocate the list to remove the extra space. Otherwise, if the |
| 3453 | * extents are being removed from the middle of the existing extent |
| 3454 | * entries, then we first need to move the extent records beginning |
| 3455 | * at idx + ext_diff up in the list to overwrite the records being |
| 3456 | * removed, then remove the extra space via kmem_realloc. |
| 3457 | */ |
| 3458 | void |
| 3459 | xfs_iext_remove_direct( |
| 3460 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3461 | xfs_extnum_t idx, /* index to begin removing exts */ |
| 3462 | int ext_diff) /* number of extents to remove */ |
| 3463 | { |
| 3464 | xfs_extnum_t nextents; /* number of extents in file */ |
| 3465 | int new_size; /* size of extents after removal */ |
| 3466 | |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3467 | ASSERT(!(ifp->if_flags & XFS_IFEXTIREC)); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3468 | new_size = ifp->if_bytes - |
| 3469 | (ext_diff * sizeof(xfs_bmbt_rec_t)); |
| 3470 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 3471 | |
| 3472 | if (new_size == 0) { |
| 3473 | xfs_iext_destroy(ifp); |
| 3474 | return; |
| 3475 | } |
| 3476 | /* Move extents up in the list (if needed) */ |
| 3477 | if (idx + ext_diff < nextents) { |
| 3478 | memmove(&ifp->if_u1.if_extents[idx], |
| 3479 | &ifp->if_u1.if_extents[idx + ext_diff], |
| 3480 | (nextents - (idx + ext_diff)) * |
| 3481 | sizeof(xfs_bmbt_rec_t)); |
| 3482 | } |
| 3483 | memset(&ifp->if_u1.if_extents[nextents - ext_diff], |
| 3484 | 0, ext_diff * sizeof(xfs_bmbt_rec_t)); |
| 3485 | /* |
| 3486 | * Reallocate the direct extent list. If the extents |
| 3487 | * will fit inside the inode then xfs_iext_realloc_direct |
| 3488 | * will switch from direct to inline extent allocation |
| 3489 | * mode for us. |
| 3490 | */ |
| 3491 | xfs_iext_realloc_direct(ifp, new_size); |
| 3492 | ifp->if_bytes = new_size; |
| 3493 | } |
| 3494 | |
| 3495 | /* |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3496 | * This is called when incore extents are being removed from the |
| 3497 | * indirection array and the extents being removed span multiple extent |
| 3498 | * buffers. The idx parameter contains the file extent index where we |
| 3499 | * want to begin removing extents, and the count parameter contains |
| 3500 | * how many extents need to be removed. |
| 3501 | * |
| 3502 | * |-------| |-------| |
| 3503 | * | nex1 | | | nex1 - number of extents before idx |
| 3504 | * |-------| | count | |
| 3505 | * | | | | count - number of extents being removed at idx |
| 3506 | * | count | |-------| |
| 3507 | * | | | nex2 | nex2 - number of extents after idx + count |
| 3508 | * |-------| |-------| |
| 3509 | */ |
| 3510 | void |
| 3511 | xfs_iext_remove_indirect( |
| 3512 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3513 | xfs_extnum_t idx, /* index to begin removing extents */ |
| 3514 | int count) /* number of extents to remove */ |
| 3515 | { |
| 3516 | xfs_ext_irec_t *erp; /* indirection array pointer */ |
| 3517 | int erp_idx = 0; /* indirection array index */ |
| 3518 | xfs_extnum_t ext_cnt; /* extents left to remove */ |
| 3519 | xfs_extnum_t ext_diff; /* extents to remove in current list */ |
| 3520 | xfs_extnum_t nex1; /* number of extents before idx */ |
| 3521 | xfs_extnum_t nex2; /* extents after idx + count */ |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3522 | int page_idx = idx; /* index in target extent list */ |
| 3523 | |
| 3524 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 3525 | erp = xfs_iext_idx_to_irec(ifp, &page_idx, &erp_idx, 0); |
| 3526 | ASSERT(erp != NULL); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3527 | nex1 = page_idx; |
| 3528 | ext_cnt = count; |
| 3529 | while (ext_cnt) { |
| 3530 | nex2 = MAX((erp->er_extcount - (nex1 + ext_cnt)), 0); |
| 3531 | ext_diff = MIN(ext_cnt, (erp->er_extcount - nex1)); |
| 3532 | /* |
| 3533 | * Check for deletion of entire list; |
| 3534 | * xfs_iext_irec_remove() updates extent offsets. |
| 3535 | */ |
| 3536 | if (ext_diff == erp->er_extcount) { |
| 3537 | xfs_iext_irec_remove(ifp, erp_idx); |
| 3538 | ext_cnt -= ext_diff; |
| 3539 | nex1 = 0; |
| 3540 | if (ext_cnt) { |
| 3541 | ASSERT(erp_idx < ifp->if_real_bytes / |
| 3542 | XFS_IEXT_BUFSZ); |
| 3543 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; |
| 3544 | nex1 = 0; |
| 3545 | continue; |
| 3546 | } else { |
| 3547 | break; |
| 3548 | } |
| 3549 | } |
| 3550 | /* Move extents up (if needed) */ |
| 3551 | if (nex2) { |
| 3552 | memmove(&erp->er_extbuf[nex1], |
| 3553 | &erp->er_extbuf[nex1 + ext_diff], |
| 3554 | nex2 * sizeof(xfs_bmbt_rec_t)); |
| 3555 | } |
| 3556 | /* Zero out rest of page */ |
| 3557 | memset(&erp->er_extbuf[nex1 + nex2], 0, (XFS_IEXT_BUFSZ - |
| 3558 | ((nex1 + nex2) * sizeof(xfs_bmbt_rec_t)))); |
| 3559 | /* Update remaining counters */ |
| 3560 | erp->er_extcount -= ext_diff; |
| 3561 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, -ext_diff); |
| 3562 | ext_cnt -= ext_diff; |
| 3563 | nex1 = 0; |
| 3564 | erp_idx++; |
| 3565 | erp++; |
| 3566 | } |
| 3567 | ifp->if_bytes -= count * sizeof(xfs_bmbt_rec_t); |
| 3568 | xfs_iext_irec_compact(ifp); |
| 3569 | } |
| 3570 | |
| 3571 | /* |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3572 | * Create, destroy, or resize a linear (direct) block of extents. |
| 3573 | */ |
| 3574 | void |
| 3575 | xfs_iext_realloc_direct( |
| 3576 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3577 | int new_size) /* new size of extents */ |
| 3578 | { |
| 3579 | int rnew_size; /* real new size of extents */ |
| 3580 | |
| 3581 | rnew_size = new_size; |
| 3582 | |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3583 | ASSERT(!(ifp->if_flags & XFS_IFEXTIREC) || |
| 3584 | ((new_size >= 0) && (new_size <= XFS_IEXT_BUFSZ) && |
| 3585 | (new_size != ifp->if_real_bytes))); |
| 3586 | |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3587 | /* Free extent records */ |
| 3588 | if (new_size == 0) { |
| 3589 | xfs_iext_destroy(ifp); |
| 3590 | } |
| 3591 | /* Resize direct extent list and zero any new bytes */ |
| 3592 | else if (ifp->if_real_bytes) { |
| 3593 | /* Check if extents will fit inside the inode */ |
| 3594 | if (new_size <= XFS_INLINE_EXTS * sizeof(xfs_bmbt_rec_t)) { |
| 3595 | xfs_iext_direct_to_inline(ifp, new_size / |
| 3596 | (uint)sizeof(xfs_bmbt_rec_t)); |
| 3597 | ifp->if_bytes = new_size; |
| 3598 | return; |
| 3599 | } |
Vignesh Babu | 16a087d | 2007-06-28 16:46:37 +1000 | [diff] [blame] | 3600 | if (!is_power_of_2(new_size)){ |
Robert P. J. Day | 40ebd81 | 2007-11-23 16:30:51 +1100 | [diff] [blame] | 3601 | rnew_size = roundup_pow_of_two(new_size); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3602 | } |
| 3603 | if (rnew_size != ifp->if_real_bytes) { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 3604 | ifp->if_u1.if_extents = |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3605 | kmem_realloc(ifp->if_u1.if_extents, |
| 3606 | rnew_size, |
David Chinner | 6785073 | 2008-08-13 16:02:51 +1000 | [diff] [blame] | 3607 | ifp->if_real_bytes, KM_NOFS); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3608 | } |
| 3609 | if (rnew_size > ifp->if_real_bytes) { |
| 3610 | memset(&ifp->if_u1.if_extents[ifp->if_bytes / |
| 3611 | (uint)sizeof(xfs_bmbt_rec_t)], 0, |
| 3612 | rnew_size - ifp->if_real_bytes); |
| 3613 | } |
| 3614 | } |
| 3615 | /* |
| 3616 | * Switch from the inline extent buffer to a direct |
| 3617 | * extent list. Be sure to include the inline extent |
| 3618 | * bytes in new_size. |
| 3619 | */ |
| 3620 | else { |
| 3621 | new_size += ifp->if_bytes; |
Vignesh Babu | 16a087d | 2007-06-28 16:46:37 +1000 | [diff] [blame] | 3622 | if (!is_power_of_2(new_size)) { |
Robert P. J. Day | 40ebd81 | 2007-11-23 16:30:51 +1100 | [diff] [blame] | 3623 | rnew_size = roundup_pow_of_two(new_size); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3624 | } |
| 3625 | xfs_iext_inline_to_direct(ifp, rnew_size); |
| 3626 | } |
| 3627 | ifp->if_real_bytes = rnew_size; |
| 3628 | ifp->if_bytes = new_size; |
| 3629 | } |
| 3630 | |
| 3631 | /* |
| 3632 | * Switch from linear (direct) extent records to inline buffer. |
| 3633 | */ |
| 3634 | void |
| 3635 | xfs_iext_direct_to_inline( |
| 3636 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3637 | xfs_extnum_t nextents) /* number of extents in file */ |
| 3638 | { |
| 3639 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); |
| 3640 | ASSERT(nextents <= XFS_INLINE_EXTS); |
| 3641 | /* |
| 3642 | * The inline buffer was zeroed when we switched |
| 3643 | * from inline to direct extent allocation mode, |
| 3644 | * so we don't need to clear it here. |
| 3645 | */ |
| 3646 | memcpy(ifp->if_u2.if_inline_ext, ifp->if_u1.if_extents, |
| 3647 | nextents * sizeof(xfs_bmbt_rec_t)); |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 3648 | kmem_free(ifp->if_u1.if_extents); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3649 | ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext; |
| 3650 | ifp->if_real_bytes = 0; |
| 3651 | } |
| 3652 | |
| 3653 | /* |
| 3654 | * Switch from inline buffer to linear (direct) extent records. |
| 3655 | * new_size should already be rounded up to the next power of 2 |
| 3656 | * by the caller (when appropriate), so use new_size as it is. |
| 3657 | * However, since new_size may be rounded up, we can't update |
| 3658 | * if_bytes here. It is the caller's responsibility to update |
| 3659 | * if_bytes upon return. |
| 3660 | */ |
| 3661 | void |
| 3662 | xfs_iext_inline_to_direct( |
| 3663 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3664 | int new_size) /* number of extents in file */ |
| 3665 | { |
David Chinner | 6785073 | 2008-08-13 16:02:51 +1000 | [diff] [blame] | 3666 | ifp->if_u1.if_extents = kmem_alloc(new_size, KM_NOFS); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3667 | memset(ifp->if_u1.if_extents, 0, new_size); |
| 3668 | if (ifp->if_bytes) { |
| 3669 | memcpy(ifp->if_u1.if_extents, ifp->if_u2.if_inline_ext, |
| 3670 | ifp->if_bytes); |
| 3671 | memset(ifp->if_u2.if_inline_ext, 0, XFS_INLINE_EXTS * |
| 3672 | sizeof(xfs_bmbt_rec_t)); |
| 3673 | } |
| 3674 | ifp->if_real_bytes = new_size; |
| 3675 | } |
| 3676 | |
| 3677 | /* |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3678 | * Resize an extent indirection array to new_size bytes. |
| 3679 | */ |
Eric Sandeen | d96f8f8 | 2009-07-02 00:09:33 -0500 | [diff] [blame] | 3680 | STATIC void |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3681 | xfs_iext_realloc_indirect( |
| 3682 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3683 | int new_size) /* new indirection array size */ |
| 3684 | { |
| 3685 | int nlists; /* number of irec's (ex lists) */ |
| 3686 | int size; /* current indirection array size */ |
| 3687 | |
| 3688 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 3689 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 3690 | size = nlists * sizeof(xfs_ext_irec_t); |
| 3691 | ASSERT(ifp->if_real_bytes); |
| 3692 | ASSERT((new_size >= 0) && (new_size != size)); |
| 3693 | if (new_size == 0) { |
| 3694 | xfs_iext_destroy(ifp); |
| 3695 | } else { |
| 3696 | ifp->if_u1.if_ext_irec = (xfs_ext_irec_t *) |
| 3697 | kmem_realloc(ifp->if_u1.if_ext_irec, |
David Chinner | 6785073 | 2008-08-13 16:02:51 +1000 | [diff] [blame] | 3698 | new_size, size, KM_NOFS); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3699 | } |
| 3700 | } |
| 3701 | |
| 3702 | /* |
| 3703 | * Switch from indirection array to linear (direct) extent allocations. |
| 3704 | */ |
Eric Sandeen | d96f8f8 | 2009-07-02 00:09:33 -0500 | [diff] [blame] | 3705 | STATIC void |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3706 | xfs_iext_indirect_to_direct( |
| 3707 | xfs_ifork_t *ifp) /* inode fork pointer */ |
| 3708 | { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 3709 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3710 | xfs_extnum_t nextents; /* number of extents in file */ |
| 3711 | int size; /* size of file extents */ |
| 3712 | |
| 3713 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 3714 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 3715 | ASSERT(nextents <= XFS_LINEAR_EXTS); |
| 3716 | size = nextents * sizeof(xfs_bmbt_rec_t); |
| 3717 | |
Lachlan McIlroy | 71a8c87 | 2008-09-26 12:17:57 +1000 | [diff] [blame] | 3718 | xfs_iext_irec_compact_pages(ifp); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3719 | ASSERT(ifp->if_real_bytes == XFS_IEXT_BUFSZ); |
| 3720 | |
| 3721 | ep = ifp->if_u1.if_ext_irec->er_extbuf; |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 3722 | kmem_free(ifp->if_u1.if_ext_irec); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3723 | ifp->if_flags &= ~XFS_IFEXTIREC; |
| 3724 | ifp->if_u1.if_extents = ep; |
| 3725 | ifp->if_bytes = size; |
| 3726 | if (nextents < XFS_LINEAR_EXTS) { |
| 3727 | xfs_iext_realloc_direct(ifp, size); |
| 3728 | } |
| 3729 | } |
| 3730 | |
| 3731 | /* |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3732 | * Free incore file extents. |
| 3733 | */ |
| 3734 | void |
| 3735 | xfs_iext_destroy( |
| 3736 | xfs_ifork_t *ifp) /* inode fork pointer */ |
| 3737 | { |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3738 | if (ifp->if_flags & XFS_IFEXTIREC) { |
| 3739 | int erp_idx; |
| 3740 | int nlists; |
| 3741 | |
| 3742 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 3743 | for (erp_idx = nlists - 1; erp_idx >= 0 ; erp_idx--) { |
| 3744 | xfs_iext_irec_remove(ifp, erp_idx); |
| 3745 | } |
| 3746 | ifp->if_flags &= ~XFS_IFEXTIREC; |
| 3747 | } else if (ifp->if_real_bytes) { |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 3748 | kmem_free(ifp->if_u1.if_extents); |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 3749 | } else if (ifp->if_bytes) { |
| 3750 | memset(ifp->if_u2.if_inline_ext, 0, XFS_INLINE_EXTS * |
| 3751 | sizeof(xfs_bmbt_rec_t)); |
| 3752 | } |
| 3753 | ifp->if_u1.if_extents = NULL; |
| 3754 | ifp->if_real_bytes = 0; |
| 3755 | ifp->if_bytes = 0; |
| 3756 | } |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3757 | |
| 3758 | /* |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 3759 | * Return a pointer to the extent record for file system block bno. |
| 3760 | */ |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 3761 | xfs_bmbt_rec_host_t * /* pointer to found extent record */ |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 3762 | xfs_iext_bno_to_ext( |
| 3763 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3764 | xfs_fileoff_t bno, /* block number to search for */ |
| 3765 | xfs_extnum_t *idxp) /* index of target extent */ |
| 3766 | { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 3767 | xfs_bmbt_rec_host_t *base; /* pointer to first extent */ |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 3768 | xfs_filblks_t blockcount = 0; /* number of blocks in extent */ |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 3769 | xfs_bmbt_rec_host_t *ep = NULL; /* pointer to target extent */ |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 3770 | xfs_ext_irec_t *erp = NULL; /* indirection array pointer */ |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 3771 | int high; /* upper boundary in search */ |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 3772 | xfs_extnum_t idx = 0; /* index of target extent */ |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 3773 | int low; /* lower boundary in search */ |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 3774 | xfs_extnum_t nextents; /* number of file extents */ |
| 3775 | xfs_fileoff_t startoff = 0; /* start offset of extent */ |
| 3776 | |
| 3777 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 3778 | if (nextents == 0) { |
| 3779 | *idxp = 0; |
| 3780 | return NULL; |
| 3781 | } |
| 3782 | low = 0; |
| 3783 | if (ifp->if_flags & XFS_IFEXTIREC) { |
| 3784 | /* Find target extent list */ |
| 3785 | int erp_idx = 0; |
| 3786 | erp = xfs_iext_bno_to_irec(ifp, bno, &erp_idx); |
| 3787 | base = erp->er_extbuf; |
| 3788 | high = erp->er_extcount - 1; |
| 3789 | } else { |
| 3790 | base = ifp->if_u1.if_extents; |
| 3791 | high = nextents - 1; |
| 3792 | } |
| 3793 | /* Binary search extent records */ |
| 3794 | while (low <= high) { |
| 3795 | idx = (low + high) >> 1; |
| 3796 | ep = base + idx; |
| 3797 | startoff = xfs_bmbt_get_startoff(ep); |
| 3798 | blockcount = xfs_bmbt_get_blockcount(ep); |
| 3799 | if (bno < startoff) { |
| 3800 | high = idx - 1; |
| 3801 | } else if (bno >= startoff + blockcount) { |
| 3802 | low = idx + 1; |
| 3803 | } else { |
| 3804 | /* Convert back to file-based extent index */ |
| 3805 | if (ifp->if_flags & XFS_IFEXTIREC) { |
| 3806 | idx += erp->er_extoff; |
| 3807 | } |
| 3808 | *idxp = idx; |
| 3809 | return ep; |
| 3810 | } |
| 3811 | } |
| 3812 | /* Convert back to file-based extent index */ |
| 3813 | if (ifp->if_flags & XFS_IFEXTIREC) { |
| 3814 | idx += erp->er_extoff; |
| 3815 | } |
| 3816 | if (bno >= startoff + blockcount) { |
| 3817 | if (++idx == nextents) { |
| 3818 | ep = NULL; |
| 3819 | } else { |
| 3820 | ep = xfs_iext_get_ext(ifp, idx); |
| 3821 | } |
| 3822 | } |
| 3823 | *idxp = idx; |
| 3824 | return ep; |
| 3825 | } |
| 3826 | |
| 3827 | /* |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3828 | * Return a pointer to the indirection array entry containing the |
| 3829 | * extent record for filesystem block bno. Store the index of the |
| 3830 | * target irec in *erp_idxp. |
| 3831 | */ |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 3832 | xfs_ext_irec_t * /* pointer to found extent record */ |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3833 | xfs_iext_bno_to_irec( |
| 3834 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3835 | xfs_fileoff_t bno, /* block number to search for */ |
| 3836 | int *erp_idxp) /* irec index of target ext list */ |
| 3837 | { |
| 3838 | xfs_ext_irec_t *erp = NULL; /* indirection array pointer */ |
| 3839 | xfs_ext_irec_t *erp_next; /* next indirection array entry */ |
Mandy Kirkconnell | 8867bc9 | 2006-03-17 17:25:04 +1100 | [diff] [blame] | 3840 | int erp_idx; /* indirection array index */ |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3841 | int nlists; /* number of extent irec's (lists) */ |
| 3842 | int high; /* binary search upper limit */ |
| 3843 | int low; /* binary search lower limit */ |
| 3844 | |
| 3845 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 3846 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 3847 | erp_idx = 0; |
| 3848 | low = 0; |
| 3849 | high = nlists - 1; |
| 3850 | while (low <= high) { |
| 3851 | erp_idx = (low + high) >> 1; |
| 3852 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; |
| 3853 | erp_next = erp_idx < nlists - 1 ? erp + 1 : NULL; |
| 3854 | if (bno < xfs_bmbt_get_startoff(erp->er_extbuf)) { |
| 3855 | high = erp_idx - 1; |
| 3856 | } else if (erp_next && bno >= |
| 3857 | xfs_bmbt_get_startoff(erp_next->er_extbuf)) { |
| 3858 | low = erp_idx + 1; |
| 3859 | } else { |
| 3860 | break; |
| 3861 | } |
| 3862 | } |
| 3863 | *erp_idxp = erp_idx; |
| 3864 | return erp; |
| 3865 | } |
| 3866 | |
| 3867 | /* |
| 3868 | * Return a pointer to the indirection array entry containing the |
| 3869 | * extent record at file extent index *idxp. Store the index of the |
| 3870 | * target irec in *erp_idxp and store the page index of the target |
| 3871 | * extent record in *idxp. |
| 3872 | */ |
| 3873 | xfs_ext_irec_t * |
| 3874 | xfs_iext_idx_to_irec( |
| 3875 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3876 | xfs_extnum_t *idxp, /* extent index (file -> page) */ |
| 3877 | int *erp_idxp, /* pointer to target irec */ |
| 3878 | int realloc) /* new bytes were just added */ |
| 3879 | { |
| 3880 | xfs_ext_irec_t *prev; /* pointer to previous irec */ |
| 3881 | xfs_ext_irec_t *erp = NULL; /* pointer to current irec */ |
| 3882 | int erp_idx; /* indirection array index */ |
| 3883 | int nlists; /* number of irec's (ex lists) */ |
| 3884 | int high; /* binary search upper limit */ |
| 3885 | int low; /* binary search lower limit */ |
| 3886 | xfs_extnum_t page_idx = *idxp; /* extent index in target list */ |
| 3887 | |
| 3888 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 3889 | ASSERT(page_idx >= 0 && page_idx <= |
| 3890 | ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)); |
| 3891 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 3892 | erp_idx = 0; |
| 3893 | low = 0; |
| 3894 | high = nlists - 1; |
| 3895 | |
| 3896 | /* Binary search extent irec's */ |
| 3897 | while (low <= high) { |
| 3898 | erp_idx = (low + high) >> 1; |
| 3899 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; |
| 3900 | prev = erp_idx > 0 ? erp - 1 : NULL; |
| 3901 | if (page_idx < erp->er_extoff || (page_idx == erp->er_extoff && |
| 3902 | realloc && prev && prev->er_extcount < XFS_LINEAR_EXTS)) { |
| 3903 | high = erp_idx - 1; |
| 3904 | } else if (page_idx > erp->er_extoff + erp->er_extcount || |
| 3905 | (page_idx == erp->er_extoff + erp->er_extcount && |
| 3906 | !realloc)) { |
| 3907 | low = erp_idx + 1; |
| 3908 | } else if (page_idx == erp->er_extoff + erp->er_extcount && |
| 3909 | erp->er_extcount == XFS_LINEAR_EXTS) { |
| 3910 | ASSERT(realloc); |
| 3911 | page_idx = 0; |
| 3912 | erp_idx++; |
| 3913 | erp = erp_idx < nlists ? erp + 1 : NULL; |
| 3914 | break; |
| 3915 | } else { |
| 3916 | page_idx -= erp->er_extoff; |
| 3917 | break; |
| 3918 | } |
| 3919 | } |
| 3920 | *idxp = page_idx; |
| 3921 | *erp_idxp = erp_idx; |
| 3922 | return(erp); |
| 3923 | } |
| 3924 | |
| 3925 | /* |
| 3926 | * Allocate and initialize an indirection array once the space needed |
| 3927 | * for incore extents increases above XFS_IEXT_BUFSZ. |
| 3928 | */ |
| 3929 | void |
| 3930 | xfs_iext_irec_init( |
| 3931 | xfs_ifork_t *ifp) /* inode fork pointer */ |
| 3932 | { |
| 3933 | xfs_ext_irec_t *erp; /* indirection array pointer */ |
| 3934 | xfs_extnum_t nextents; /* number of extents in file */ |
| 3935 | |
| 3936 | ASSERT(!(ifp->if_flags & XFS_IFEXTIREC)); |
| 3937 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 3938 | ASSERT(nextents <= XFS_LINEAR_EXTS); |
| 3939 | |
David Chinner | 6785073 | 2008-08-13 16:02:51 +1000 | [diff] [blame] | 3940 | erp = kmem_alloc(sizeof(xfs_ext_irec_t), KM_NOFS); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3941 | |
| 3942 | if (nextents == 0) { |
David Chinner | 6785073 | 2008-08-13 16:02:51 +1000 | [diff] [blame] | 3943 | ifp->if_u1.if_extents = kmem_alloc(XFS_IEXT_BUFSZ, KM_NOFS); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3944 | } else if (!ifp->if_real_bytes) { |
| 3945 | xfs_iext_inline_to_direct(ifp, XFS_IEXT_BUFSZ); |
| 3946 | } else if (ifp->if_real_bytes < XFS_IEXT_BUFSZ) { |
| 3947 | xfs_iext_realloc_direct(ifp, XFS_IEXT_BUFSZ); |
| 3948 | } |
| 3949 | erp->er_extbuf = ifp->if_u1.if_extents; |
| 3950 | erp->er_extcount = nextents; |
| 3951 | erp->er_extoff = 0; |
| 3952 | |
| 3953 | ifp->if_flags |= XFS_IFEXTIREC; |
| 3954 | ifp->if_real_bytes = XFS_IEXT_BUFSZ; |
| 3955 | ifp->if_bytes = nextents * sizeof(xfs_bmbt_rec_t); |
| 3956 | ifp->if_u1.if_ext_irec = erp; |
| 3957 | |
| 3958 | return; |
| 3959 | } |
| 3960 | |
| 3961 | /* |
| 3962 | * Allocate and initialize a new entry in the indirection array. |
| 3963 | */ |
| 3964 | xfs_ext_irec_t * |
| 3965 | xfs_iext_irec_new( |
| 3966 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 3967 | int erp_idx) /* index for new irec */ |
| 3968 | { |
| 3969 | xfs_ext_irec_t *erp; /* indirection array pointer */ |
| 3970 | int i; /* loop counter */ |
| 3971 | int nlists; /* number of irec's (ex lists) */ |
| 3972 | |
| 3973 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 3974 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 3975 | |
| 3976 | /* Resize indirection array */ |
| 3977 | xfs_iext_realloc_indirect(ifp, ++nlists * |
| 3978 | sizeof(xfs_ext_irec_t)); |
| 3979 | /* |
| 3980 | * Move records down in the array so the |
| 3981 | * new page can use erp_idx. |
| 3982 | */ |
| 3983 | erp = ifp->if_u1.if_ext_irec; |
| 3984 | for (i = nlists - 1; i > erp_idx; i--) { |
| 3985 | memmove(&erp[i], &erp[i-1], sizeof(xfs_ext_irec_t)); |
| 3986 | } |
| 3987 | ASSERT(i == erp_idx); |
| 3988 | |
| 3989 | /* Initialize new extent record */ |
| 3990 | erp = ifp->if_u1.if_ext_irec; |
David Chinner | 6785073 | 2008-08-13 16:02:51 +1000 | [diff] [blame] | 3991 | erp[erp_idx].er_extbuf = kmem_alloc(XFS_IEXT_BUFSZ, KM_NOFS); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 3992 | ifp->if_real_bytes = nlists * XFS_IEXT_BUFSZ; |
| 3993 | memset(erp[erp_idx].er_extbuf, 0, XFS_IEXT_BUFSZ); |
| 3994 | erp[erp_idx].er_extcount = 0; |
| 3995 | erp[erp_idx].er_extoff = erp_idx > 0 ? |
| 3996 | erp[erp_idx-1].er_extoff + erp[erp_idx-1].er_extcount : 0; |
| 3997 | return (&erp[erp_idx]); |
| 3998 | } |
| 3999 | |
| 4000 | /* |
| 4001 | * Remove a record from the indirection array. |
| 4002 | */ |
| 4003 | void |
| 4004 | xfs_iext_irec_remove( |
| 4005 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 4006 | int erp_idx) /* irec index to remove */ |
| 4007 | { |
| 4008 | xfs_ext_irec_t *erp; /* indirection array pointer */ |
| 4009 | int i; /* loop counter */ |
| 4010 | int nlists; /* number of irec's (ex lists) */ |
| 4011 | |
| 4012 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 4013 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4014 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; |
| 4015 | if (erp->er_extbuf) { |
| 4016 | xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, |
| 4017 | -erp->er_extcount); |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 4018 | kmem_free(erp->er_extbuf); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4019 | } |
| 4020 | /* Compact extent records */ |
| 4021 | erp = ifp->if_u1.if_ext_irec; |
| 4022 | for (i = erp_idx; i < nlists - 1; i++) { |
| 4023 | memmove(&erp[i], &erp[i+1], sizeof(xfs_ext_irec_t)); |
| 4024 | } |
| 4025 | /* |
| 4026 | * Manually free the last extent record from the indirection |
| 4027 | * array. A call to xfs_iext_realloc_indirect() with a size |
| 4028 | * of zero would result in a call to xfs_iext_destroy() which |
| 4029 | * would in turn call this function again, creating a nasty |
| 4030 | * infinite loop. |
| 4031 | */ |
| 4032 | if (--nlists) { |
| 4033 | xfs_iext_realloc_indirect(ifp, |
| 4034 | nlists * sizeof(xfs_ext_irec_t)); |
| 4035 | } else { |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 4036 | kmem_free(ifp->if_u1.if_ext_irec); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4037 | } |
| 4038 | ifp->if_real_bytes = nlists * XFS_IEXT_BUFSZ; |
| 4039 | } |
| 4040 | |
| 4041 | /* |
| 4042 | * This is called to clean up large amounts of unused memory allocated |
| 4043 | * by the indirection array. Before compacting anything though, verify |
| 4044 | * that the indirection array is still needed and switch back to the |
| 4045 | * linear extent list (or even the inline buffer) if possible. The |
| 4046 | * compaction policy is as follows: |
| 4047 | * |
| 4048 | * Full Compaction: Extents fit into a single page (or inline buffer) |
Lachlan McIlroy | 71a8c87 | 2008-09-26 12:17:57 +1000 | [diff] [blame] | 4049 | * Partial Compaction: Extents occupy less than 50% of allocated space |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4050 | * No Compaction: Extents occupy at least 50% of allocated space |
| 4051 | */ |
| 4052 | void |
| 4053 | xfs_iext_irec_compact( |
| 4054 | xfs_ifork_t *ifp) /* inode fork pointer */ |
| 4055 | { |
| 4056 | xfs_extnum_t nextents; /* number of extents in file */ |
| 4057 | int nlists; /* number of irec's (ex lists) */ |
| 4058 | |
| 4059 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 4060 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4061 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| 4062 | |
| 4063 | if (nextents == 0) { |
| 4064 | xfs_iext_destroy(ifp); |
| 4065 | } else if (nextents <= XFS_INLINE_EXTS) { |
| 4066 | xfs_iext_indirect_to_direct(ifp); |
| 4067 | xfs_iext_direct_to_inline(ifp, nextents); |
| 4068 | } else if (nextents <= XFS_LINEAR_EXTS) { |
| 4069 | xfs_iext_indirect_to_direct(ifp); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4070 | } else if (nextents < (nlists * XFS_LINEAR_EXTS) >> 1) { |
| 4071 | xfs_iext_irec_compact_pages(ifp); |
| 4072 | } |
| 4073 | } |
| 4074 | |
| 4075 | /* |
| 4076 | * Combine extents from neighboring extent pages. |
| 4077 | */ |
| 4078 | void |
| 4079 | xfs_iext_irec_compact_pages( |
| 4080 | xfs_ifork_t *ifp) /* inode fork pointer */ |
| 4081 | { |
| 4082 | xfs_ext_irec_t *erp, *erp_next;/* pointers to irec entries */ |
| 4083 | int erp_idx = 0; /* indirection array index */ |
| 4084 | int nlists; /* number of irec's (ex lists) */ |
| 4085 | |
| 4086 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 4087 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4088 | while (erp_idx < nlists - 1) { |
| 4089 | erp = &ifp->if_u1.if_ext_irec[erp_idx]; |
| 4090 | erp_next = erp + 1; |
| 4091 | if (erp_next->er_extcount <= |
| 4092 | (XFS_LINEAR_EXTS - erp->er_extcount)) { |
Lachlan McIlroy | 71a8c87 | 2008-09-26 12:17:57 +1000 | [diff] [blame] | 4093 | memcpy(&erp->er_extbuf[erp->er_extcount], |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4094 | erp_next->er_extbuf, erp_next->er_extcount * |
| 4095 | sizeof(xfs_bmbt_rec_t)); |
| 4096 | erp->er_extcount += erp_next->er_extcount; |
| 4097 | /* |
| 4098 | * Free page before removing extent record |
| 4099 | * so er_extoffs don't get modified in |
| 4100 | * xfs_iext_irec_remove. |
| 4101 | */ |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 4102 | kmem_free(erp_next->er_extbuf); |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4103 | erp_next->er_extbuf = NULL; |
| 4104 | xfs_iext_irec_remove(ifp, erp_idx + 1); |
| 4105 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4106 | } else { |
| 4107 | erp_idx++; |
| 4108 | } |
| 4109 | } |
| 4110 | } |
| 4111 | |
| 4112 | /* |
Mandy Kirkconnell | 0293ce3 | 2006-03-14 13:30:23 +1100 | [diff] [blame] | 4113 | * This is called to update the er_extoff field in the indirection |
| 4114 | * array when extents have been added or removed from one of the |
| 4115 | * extent lists. erp_idx contains the irec index to begin updating |
| 4116 | * at and ext_diff contains the number of extents that were added |
| 4117 | * or removed. |
| 4118 | */ |
| 4119 | void |
| 4120 | xfs_iext_irec_update_extoffs( |
| 4121 | xfs_ifork_t *ifp, /* inode fork pointer */ |
| 4122 | int erp_idx, /* irec index to update */ |
| 4123 | int ext_diff) /* number of new extents */ |
| 4124 | { |
| 4125 | int i; /* loop counter */ |
| 4126 | int nlists; /* number of irec's (ex lists */ |
| 4127 | |
| 4128 | ASSERT(ifp->if_flags & XFS_IFEXTIREC); |
| 4129 | nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; |
| 4130 | for (i = erp_idx; i < nlists; i++) { |
| 4131 | ifp->if_u1.if_ext_irec[i].er_extoff += ext_diff; |
| 4132 | } |
| 4133 | } |