Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2003-2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #ifndef __XFS_IOMAP_H__ |
| 19 | #define __XFS_IOMAP_H__ |
| 20 | |
| 21 | #define IOMAP_DADDR_NULL ((xfs_daddr_t) (-1LL)) |
| 22 | |
| 23 | |
| 24 | typedef enum { /* iomap_flags values */ |
Lachlan McIlroy | ba87ea6 | 2007-05-08 13:49:46 +1000 | [diff] [blame] | 25 | IOMAP_READ = 0, /* mapping for a read */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | IOMAP_HOLE = 0x02, /* mapping covers a hole */ |
| 27 | IOMAP_DELAY = 0x04, /* mapping covers delalloc region */ |
| 28 | IOMAP_REALTIME = 0x10, /* mapping on the realtime device */ |
| 29 | IOMAP_UNWRITTEN = 0x20, /* mapping covers allocated */ |
| 30 | /* but uninitialized file data */ |
| 31 | IOMAP_NEW = 0x40 /* just allocate */ |
| 32 | } iomap_flags_t; |
| 33 | |
| 34 | typedef enum { |
| 35 | /* base extent manipulation calls */ |
| 36 | BMAPI_READ = (1 << 0), /* read extents */ |
| 37 | BMAPI_WRITE = (1 << 1), /* create extents */ |
| 38 | BMAPI_ALLOCATE = (1 << 2), /* delayed allocate to real extents */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | /* modifiers */ |
| 40 | BMAPI_IGNSTATE = (1 << 4), /* ignore unwritten state on read */ |
Nathan Scott | 24e17b5 | 2005-05-05 13:33:20 -0700 | [diff] [blame] | 41 | BMAPI_DIRECT = (1 << 5), /* direct instead of buffered write */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | BMAPI_MMAP = (1 << 6), /* allocate for mmap write */ |
| 43 | BMAPI_SYNC = (1 << 7), /* sync write to flush delalloc space */ |
| 44 | BMAPI_TRYLOCK = (1 << 8), /* non-blocking request */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | } bmapi_flags_t; |
| 46 | |
| 47 | |
| 48 | /* |
| 49 | * xfs_iomap_t: File system I/O map |
| 50 | * |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 51 | * The iomap_bn field is expressed in 512-byte blocks, and is where the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | * mapping starts on disk. |
| 53 | * |
| 54 | * The iomap_offset, iomap_bsize and iomap_delta fields are in bytes. |
| 55 | * iomap_offset is the offset of the mapping in the file itself. |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 56 | * iomap_bsize is the size of the mapping, iomap_delta is the |
| 57 | * desired data's offset into the mapping, given the offset supplied |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | * to the file I/O map routine. |
| 59 | * |
| 60 | * When a request is made to read beyond the logical end of the object, |
| 61 | * iomap_size may be set to 0, but iomap_offset and iomap_length should be set |
| 62 | * to the actual amount of underlying storage that has been allocated, if any. |
| 63 | */ |
| 64 | |
| 65 | typedef struct xfs_iomap { |
Malcolm Parsons | 9da096f | 2009-03-29 09:55:42 +0200 | [diff] [blame] | 66 | xfs_daddr_t iomap_bn; /* first 512B blk of mapping */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | xfs_buftarg_t *iomap_target; |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 68 | xfs_off_t iomap_offset; /* offset of mapping, bytes */ |
| 69 | xfs_off_t iomap_bsize; /* size of mapping, bytes */ |
Eric Sandeen | 55b02d7 | 2005-11-25 16:41:33 +1100 | [diff] [blame] | 70 | xfs_off_t iomap_delta; /* offset into mapping, bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | iomap_flags_t iomap_flags; |
| 72 | } xfs_iomap_t; |
| 73 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | struct xfs_inode; |
| 75 | struct xfs_bmbt_irec; |
| 76 | |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 77 | extern int xfs_iomap(struct xfs_inode *, xfs_off_t, ssize_t, int, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | struct xfs_iomap *, int *); |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 79 | extern int xfs_iomap_write_direct(struct xfs_inode *, xfs_off_t, size_t, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | int, struct xfs_bmbt_irec *, int *, int); |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 81 | extern int xfs_iomap_write_delay(struct xfs_inode *, xfs_off_t, size_t, int, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | struct xfs_bmbt_irec *, int *); |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 83 | extern int xfs_iomap_write_allocate(struct xfs_inode *, xfs_off_t, size_t, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | struct xfs_bmbt_irec *, int *); |
Nathan Scott | f403b7f | 2005-05-05 13:33:40 -0700 | [diff] [blame] | 85 | extern int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, size_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | #endif /* __XFS_IOMAP_H__*/ |