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 | */ |
| 18 | #ifndef __XFS_BMAP_H__ |
| 19 | #define __XFS_BMAP_H__ |
| 20 | |
| 21 | struct getbmap; |
| 22 | struct xfs_bmbt_irec; |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 23 | struct xfs_ifork; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | struct xfs_inode; |
| 25 | struct xfs_mount; |
| 26 | struct xfs_trans; |
| 27 | |
David Chinner | a8272ce | 2007-11-23 16:28:09 +1100 | [diff] [blame] | 28 | extern kmem_zone_t *xfs_bmap_free_item_zone; |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | /* |
| 31 | * List of extents to be free "later". |
| 32 | * The list is kept sorted on xbf_startblock. |
| 33 | */ |
| 34 | typedef struct xfs_bmap_free_item |
| 35 | { |
| 36 | xfs_fsblock_t xbfi_startblock;/* starting fs block number */ |
| 37 | xfs_extlen_t xbfi_blockcount;/* number of blocks in extent */ |
| 38 | struct xfs_bmap_free_item *xbfi_next; /* link to next entry */ |
| 39 | } xfs_bmap_free_item_t; |
| 40 | |
| 41 | /* |
| 42 | * Header for free extent list. |
Lachlan McIlroy | b877e3d | 2008-06-27 13:33:03 +1000 | [diff] [blame] | 43 | * |
| 44 | * xbf_low is used by the allocator to activate the lowspace algorithm - |
| 45 | * when free space is running low the extent allocator may choose to |
| 46 | * allocate an extent from an AG without leaving sufficient space for |
| 47 | * a btree split when inserting the new extent. In this case the allocator |
| 48 | * will enable the lowspace algorithm which is supposed to allow further |
| 49 | * allocations (such as btree splits and newroots) to allocate from |
| 50 | * sequential AGs. In order to avoid locking AGs out of order the lowspace |
| 51 | * algorithm will start searching for free space from AG 0. If the correct |
| 52 | * transaction reservations have been made then this algorithm will eventually |
| 53 | * find all the space it needs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | */ |
| 55 | typedef struct xfs_bmap_free |
| 56 | { |
| 57 | xfs_bmap_free_item_t *xbf_first; /* list of to-be-free extents */ |
| 58 | int xbf_count; /* count of items on list */ |
Lachlan McIlroy | b877e3d | 2008-06-27 13:33:03 +1000 | [diff] [blame] | 59 | int xbf_low; /* alloc in low mode */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | } xfs_bmap_free_t; |
| 61 | |
| 62 | #define XFS_BMAP_MAX_NMAP 4 |
| 63 | |
| 64 | /* |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 65 | * Flags for xfs_bmapi_* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | */ |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 67 | #define XFS_BMAPI_ENTIRE 0x001 /* return entire extent, not trimmed */ |
| 68 | #define XFS_BMAPI_METADATA 0x002 /* mapping metadata not user data */ |
| 69 | #define XFS_BMAPI_ATTRFORK 0x004 /* use attribute fork not data */ |
| 70 | #define XFS_BMAPI_PREALLOC 0x008 /* preallocation op: unwritten space */ |
| 71 | #define XFS_BMAPI_IGSTATE 0x010 /* Ignore state - */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | /* combine contig. space */ |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 73 | #define XFS_BMAPI_CONTIG 0x020 /* must allocate only one extent */ |
Dave Chinner | 4472235 | 2010-08-24 12:02:11 +1000 | [diff] [blame] | 74 | /* |
| 75 | * unwritten extent conversion - this needs write cache flushing and no additional |
| 76 | * allocation alignments. When specified with XFS_BMAPI_PREALLOC it converts |
| 77 | * from written to unwritten, otherwise convert from unwritten to written. |
| 78 | */ |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 79 | #define XFS_BMAPI_CONVERT 0x040 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 81 | #define XFS_BMAPI_FLAGS \ |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 82 | { XFS_BMAPI_ENTIRE, "ENTIRE" }, \ |
| 83 | { XFS_BMAPI_METADATA, "METADATA" }, \ |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 84 | { XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \ |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 85 | { XFS_BMAPI_PREALLOC, "PREALLOC" }, \ |
| 86 | { XFS_BMAPI_IGSTATE, "IGSTATE" }, \ |
| 87 | { XFS_BMAPI_CONTIG, "CONTIG" }, \ |
| 88 | { XFS_BMAPI_CONVERT, "CONVERT" } |
| 89 | |
| 90 | |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 91 | static inline int xfs_bmapi_aflag(int w) |
| 92 | { |
| 93 | return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK : 0); |
| 94 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
| 96 | /* |
| 97 | * Special values for xfs_bmbt_irec_t br_startblock field. |
| 98 | */ |
| 99 | #define DELAYSTARTBLOCK ((xfs_fsblock_t)-1LL) |
| 100 | #define HOLESTARTBLOCK ((xfs_fsblock_t)-2LL) |
| 101 | |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 102 | static inline void xfs_bmap_init(xfs_bmap_free_t *flp, xfs_fsblock_t *fbp) |
| 103 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | ((flp)->xbf_first = NULL, (flp)->xbf_count = 0, \ |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 105 | (flp)->xbf_low = 0, *(fbp) = NULLFSBLOCK); |
| 106 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
| 108 | /* |
| 109 | * Argument structure for xfs_bmap_alloc. |
| 110 | */ |
| 111 | typedef struct xfs_bmalloca { |
Dave Chinner | 0937e0f | 2011-09-18 20:40:57 +0000 | [diff] [blame] | 112 | xfs_fsblock_t *firstblock; /* i/o first block allocated */ |
| 113 | struct xfs_bmap_free *flist; /* bmap freelist */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | struct xfs_trans *tp; /* transaction pointer */ |
| 115 | struct xfs_inode *ip; /* incore inode pointer */ |
Dave Chinner | baf41a5 | 2011-09-18 20:40:56 +0000 | [diff] [blame] | 116 | struct xfs_bmbt_irec prev; /* extent before the new one */ |
| 117 | struct xfs_bmbt_irec got; /* extent after, or delayed */ |
Dave Chinner | 3a75667 | 2011-09-18 20:40:58 +0000 | [diff] [blame] | 118 | |
| 119 | xfs_fileoff_t offset; /* offset in file filling in */ |
| 120 | xfs_extlen_t length; /* i/o length asked/allocated */ |
| 121 | xfs_fsblock_t blkno; /* starting block of new extent */ |
| 122 | |
Dave Chinner | 29c8d17 | 2011-09-18 20:41:00 +0000 | [diff] [blame] | 123 | struct xfs_btree_cur *cur; /* btree cursor */ |
Dave Chinner | e0c3da5 | 2011-09-18 20:41:01 +0000 | [diff] [blame] | 124 | xfs_extnum_t idx; /* current extent index */ |
| 125 | int nallocs;/* number of extents alloc'd */ |
Christoph Hellwig | c315c90 | 2011-09-18 20:41:02 +0000 | [diff] [blame^] | 126 | int logflags;/* flags for transaction logging */ |
Dave Chinner | 29c8d17 | 2011-09-18 20:41:00 +0000 | [diff] [blame] | 127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | xfs_extlen_t total; /* total blocks needed for xaction */ |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 129 | xfs_extlen_t minlen; /* minimum allocation size (blocks) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | xfs_extlen_t minleft; /* amount must be left after alloc */ |
| 131 | char eof; /* set if allocating past last extent */ |
| 132 | char wasdel; /* replacing a delayed allocation */ |
| 133 | char userdata;/* set if is user data */ |
Nathan Scott | dd9f438 | 2006-01-11 15:28:28 +1100 | [diff] [blame] | 134 | char aeof; /* allocated space at eof */ |
| 135 | char conv; /* overwriting unwritten extents */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | } xfs_bmalloca_t; |
| 137 | |
Christoph Hellwig | 7574aa9 | 2009-11-25 00:00:19 +0000 | [diff] [blame] | 138 | /* |
| 139 | * Flags for xfs_bmap_add_extent*. |
| 140 | */ |
| 141 | #define BMAP_LEFT_CONTIG (1 << 0) |
| 142 | #define BMAP_RIGHT_CONTIG (1 << 1) |
| 143 | #define BMAP_LEFT_FILLING (1 << 2) |
| 144 | #define BMAP_RIGHT_FILLING (1 << 3) |
| 145 | #define BMAP_LEFT_DELAY (1 << 4) |
| 146 | #define BMAP_RIGHT_DELAY (1 << 5) |
| 147 | #define BMAP_LEFT_VALID (1 << 6) |
| 148 | #define BMAP_RIGHT_VALID (1 << 7) |
Christoph Hellwig | 6ef3554 | 2009-11-25 00:00:21 +0000 | [diff] [blame] | 149 | #define BMAP_ATTRFORK (1 << 8) |
Christoph Hellwig | 7574aa9 | 2009-11-25 00:00:19 +0000 | [diff] [blame] | 150 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 151 | #define XFS_BMAP_EXT_FLAGS \ |
| 152 | { BMAP_LEFT_CONTIG, "LC" }, \ |
| 153 | { BMAP_RIGHT_CONTIG, "RC" }, \ |
| 154 | { BMAP_LEFT_FILLING, "LF" }, \ |
| 155 | { BMAP_RIGHT_FILLING, "RF" }, \ |
| 156 | { BMAP_ATTRFORK, "ATTR" } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
| 158 | /* |
| 159 | * Add bmap trace insert entries for all the contents of the extent list. |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 160 | * |
| 161 | * Quite excessive tracing. Only do this for debug builds. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | */ |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 163 | #if defined(__KERNEL) && defined(DEBUG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | void |
| 165 | xfs_bmap_trace_exlist( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | struct xfs_inode *ip, /* incore inode pointer */ |
| 167 | xfs_extnum_t cnt, /* count of entries in list */ |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 168 | int whichfork, |
| 169 | unsigned long caller_ip); /* data or attr fork */ |
Eric Sandeen | 3a59c94 | 2007-07-11 11:09:47 +1000 | [diff] [blame] | 170 | #define XFS_BMAP_TRACE_EXLIST(ip,c,w) \ |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 171 | xfs_bmap_trace_exlist(ip,c,w, _THIS_IP_) |
| 172 | #else |
Eric Sandeen | 3a59c94 | 2007-07-11 11:09:47 +1000 | [diff] [blame] | 173 | #define XFS_BMAP_TRACE_EXLIST(ip,c,w) |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 174 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
| 176 | /* |
| 177 | * Convert inode from non-attributed to attributed. |
| 178 | * Must not be in a transaction, ip must not be locked. |
| 179 | */ |
| 180 | int /* error code */ |
| 181 | xfs_bmap_add_attrfork( |
| 182 | struct xfs_inode *ip, /* incore inode pointer */ |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 183 | int size, /* space needed for new attribute */ |
| 184 | int rsvd); /* flag for reserved block allocation */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | |
| 186 | /* |
| 187 | * Add the extent to the list of extents to be free at transaction end. |
| 188 | * The list is maintained sorted (by block number). |
| 189 | */ |
| 190 | void |
| 191 | xfs_bmap_add_free( |
| 192 | xfs_fsblock_t bno, /* fs block number of extent */ |
| 193 | xfs_filblks_t len, /* length of extent */ |
| 194 | xfs_bmap_free_t *flist, /* list of extents */ |
| 195 | struct xfs_mount *mp); /* mount point structure */ |
| 196 | |
| 197 | /* |
| 198 | * Routine to clean up the free list data structure when |
| 199 | * an error occurs during a transaction. |
| 200 | */ |
| 201 | void |
| 202 | xfs_bmap_cancel( |
| 203 | xfs_bmap_free_t *flist); /* free list to clean up */ |
| 204 | |
| 205 | /* |
| 206 | * Compute and fill in the value of the maximum depth of a bmap btree |
| 207 | * in this filesystem. Done once, during mount. |
| 208 | */ |
| 209 | void |
| 210 | xfs_bmap_compute_maxlevels( |
| 211 | struct xfs_mount *mp, /* file system mount structure */ |
| 212 | int whichfork); /* data or attr fork */ |
| 213 | |
| 214 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | * Returns the file-relative block number of the first unused block in the file. |
| 216 | * This is the lowest-address hole if the file has holes, else the first block |
| 217 | * past the end of file. |
| 218 | */ |
| 219 | int /* error */ |
| 220 | xfs_bmap_first_unused( |
| 221 | struct xfs_trans *tp, /* transaction pointer */ |
| 222 | struct xfs_inode *ip, /* incore inode */ |
| 223 | xfs_extlen_t len, /* size of hole to find */ |
| 224 | xfs_fileoff_t *unused, /* unused block num */ |
| 225 | int whichfork); /* data or attr fork */ |
| 226 | |
| 227 | /* |
| 228 | * Returns the file-relative block number of the last block + 1 before |
| 229 | * last_block (input value) in the file. |
| 230 | * This is not based on i_size, it is based on the extent list. |
| 231 | * Returns 0 for local files, as they do not have an extent list. |
| 232 | */ |
| 233 | int /* error */ |
| 234 | xfs_bmap_last_before( |
| 235 | struct xfs_trans *tp, /* transaction pointer */ |
| 236 | struct xfs_inode *ip, /* incore inode */ |
| 237 | xfs_fileoff_t *last_block, /* last block */ |
| 238 | int whichfork); /* data or attr fork */ |
| 239 | |
| 240 | /* |
| 241 | * Returns the file-relative block number of the first block past eof in |
| 242 | * the file. This is not based on i_size, it is based on the extent list. |
| 243 | * Returns 0 for local files, as they do not have an extent list. |
| 244 | */ |
| 245 | int /* error */ |
| 246 | xfs_bmap_last_offset( |
| 247 | struct xfs_trans *tp, /* transaction pointer */ |
| 248 | struct xfs_inode *ip, /* incore inode */ |
| 249 | xfs_fileoff_t *unused, /* last block num */ |
| 250 | int whichfork); /* data or attr fork */ |
| 251 | |
| 252 | /* |
| 253 | * Returns whether the selected fork of the inode has exactly one |
| 254 | * block or not. For the data fork we check this matches di_size, |
| 255 | * implying the file's range is 0..bsize-1. |
| 256 | */ |
| 257 | int |
| 258 | xfs_bmap_one_block( |
| 259 | struct xfs_inode *ip, /* incore inode */ |
| 260 | int whichfork); /* data or attr fork */ |
| 261 | |
| 262 | /* |
| 263 | * Read in the extents to iu_extents. |
| 264 | * All inode fields are set up by caller, we just traverse the btree |
| 265 | * and copy the records in. |
| 266 | */ |
| 267 | int /* error */ |
| 268 | xfs_bmap_read_extents( |
| 269 | struct xfs_trans *tp, /* transaction pointer */ |
| 270 | struct xfs_inode *ip, /* incore inode */ |
| 271 | int whichfork); /* data or attr fork */ |
| 272 | |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 273 | int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno, |
| 274 | xfs_filblks_t len, struct xfs_bmbt_irec *mval, |
| 275 | int *nmap, int flags); |
Christoph Hellwig | 4403280 | 2011-09-18 20:40:48 +0000 | [diff] [blame] | 276 | int xfs_bmapi_delay(struct xfs_inode *ip, xfs_fileoff_t bno, |
| 277 | xfs_filblks_t len, struct xfs_bmbt_irec *mval, |
| 278 | int *nmap, int flags); |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 279 | int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip, |
| 280 | xfs_fileoff_t bno, xfs_filblks_t len, int flags, |
| 281 | xfs_fsblock_t *firstblock, xfs_extlen_t total, |
| 282 | struct xfs_bmbt_irec *mval, int *nmap, |
| 283 | struct xfs_bmap_free *flist); |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 284 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | * Unmap (remove) blocks from a file. |
| 287 | * If nexts is nonzero then the number of extents to remove is limited to |
| 288 | * that value. If not all extents in the block range can be removed then |
| 289 | * *done is set. |
| 290 | */ |
| 291 | int /* error */ |
| 292 | xfs_bunmapi( |
| 293 | struct xfs_trans *tp, /* transaction pointer */ |
| 294 | struct xfs_inode *ip, /* incore inode */ |
| 295 | xfs_fileoff_t bno, /* starting offset to unmap */ |
| 296 | xfs_filblks_t len, /* length to unmap in file */ |
| 297 | int flags, /* XFS_BMAPI_... */ |
| 298 | xfs_extnum_t nexts, /* number of extents max */ |
| 299 | xfs_fsblock_t *firstblock, /* first allocated block |
| 300 | controls a.g. for allocs */ |
| 301 | xfs_bmap_free_t *flist, /* i/o: list extents to free */ |
| 302 | int *done); /* set if not done yet */ |
| 303 | |
| 304 | /* |
Barry Naujok | 847fff5 | 2008-10-30 17:05:38 +1100 | [diff] [blame] | 305 | * Check an extent list, which has just been read, for |
| 306 | * any bit in the extent flag field. |
| 307 | */ |
| 308 | int |
| 309 | xfs_check_nostate_extents( |
| 310 | struct xfs_ifork *ifp, |
| 311 | xfs_extnum_t idx, |
| 312 | xfs_extnum_t num); |
| 313 | |
Christoph Hellwig | 1a5902c | 2009-03-29 19:26:46 +0200 | [diff] [blame] | 314 | uint |
| 315 | xfs_default_attroffset( |
| 316 | struct xfs_inode *ip); |
| 317 | |
Barry Naujok | 847fff5 | 2008-10-30 17:05:38 +1100 | [diff] [blame] | 318 | #ifdef __KERNEL__ |
| 319 | |
| 320 | /* |
| 321 | * Routine to be called at transaction's end by xfs_bmapi, xfs_bunmapi |
| 322 | * caller. Frees all the extents that need freeing, which must be done |
| 323 | * last due to locking considerations. |
| 324 | * |
| 325 | * Return 1 if the given transaction was committed and a new one allocated, |
| 326 | * and 0 otherwise. |
| 327 | */ |
| 328 | int /* error */ |
| 329 | xfs_bmap_finish( |
| 330 | struct xfs_trans **tp, /* transaction pointer addr */ |
| 331 | xfs_bmap_free_t *flist, /* i/o: list extents to free */ |
| 332 | int *committed); /* xact committed or not */ |
| 333 | |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 334 | /* bmap to userspace formatter - copy to user & advance pointer */ |
| 335 | typedef int (*xfs_bmap_format_t)(void **, struct getbmapx *, int *); |
| 336 | |
Barry Naujok | 847fff5 | 2008-10-30 17:05:38 +1100 | [diff] [blame] | 337 | /* |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 338 | * Get inode's extents as described in bmv, and format for output. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | */ |
| 340 | int /* error code */ |
| 341 | xfs_getbmap( |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 342 | xfs_inode_t *ip, |
Eric Sandeen | 8a7141a | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 343 | struct getbmapx *bmv, /* user bmap structure */ |
| 344 | xfs_bmap_format_t formatter, /* format to user */ |
| 345 | void *arg); /* formatter arg */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | |
| 347 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | * Check if the endoff is outside the last extent. If so the caller will grow |
| 349 | * the allocation to a stripe unit boundary |
| 350 | */ |
| 351 | int |
| 352 | xfs_bmap_eof( |
| 353 | struct xfs_inode *ip, |
| 354 | xfs_fileoff_t endoff, |
| 355 | int whichfork, |
| 356 | int *eof); |
| 357 | |
| 358 | /* |
| 359 | * Count fsblocks of the given fork. |
| 360 | */ |
| 361 | int |
| 362 | xfs_bmap_count_blocks( |
| 363 | xfs_trans_t *tp, |
| 364 | struct xfs_inode *ip, |
| 365 | int whichfork, |
| 366 | int *count); |
| 367 | |
Dave Chinner | c726de4 | 2010-11-30 15:14:39 +1100 | [diff] [blame] | 368 | int |
| 369 | xfs_bmap_punch_delalloc_range( |
| 370 | struct xfs_inode *ip, |
| 371 | xfs_fileoff_t start_fsb, |
| 372 | xfs_fileoff_t length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | #endif /* __KERNEL__ */ |
| 374 | |
| 375 | #endif /* __XFS_BMAP_H__ */ |