git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * file.c | |
| 3 | * | |
| 4 | * Copyright (c) 1999 Al Smith | |
| 5 | * | |
| 6 | * Portions derived from work (c) 1995,1996 Christian Vogelgsang. | |
| 7 | */ | |
| 8 | ||
| 9 | #include <linux/buffer_head.h> | |
| 45254b4f | 10 | #include "efs.h" |
| 1da177e4 LT |
11 | |
| 12 | int efs_get_block(struct inode *inode, sector_t iblock, | |
| 13 | struct buffer_head *bh_result, int create) | |
| 14 | { | |
| 15 | int error = -EROFS; | |
| 16 | long phys; | |
| 17 | ||
| 18 | if (create) | |
| 19 | return error; | |
| 20 | if (iblock >= inode->i_blocks) { | |
| 21 | #ifdef DEBUG | |
| 22 | /* | |
| 23 | * i have no idea why this happens as often as it does | |
| 24 | */ | |
| 25 | printk(KERN_WARNING "EFS: bmap(): block %d >= %ld (filesize %ld)\n", | |
| 26 | block, | |
| 27 | inode->i_blocks, | |
| 28 | inode->i_size); | |
| 29 | #endif | |
| 30 | return 0; | |
| 31 | } | |
| 32 | phys = efs_map_block(inode, iblock); | |
| 33 | if (phys) | |
| 34 | map_bh(bh_result, inode->i_sb, phys); | |
| 35 | return 0; | |
| 36 | } | |
| 37 | ||
| 38 | int efs_bmap(struct inode *inode, efs_block_t block) { | |
| 39 | ||
| 40 | if (block < 0) { | |
| 41 | printk(KERN_WARNING "EFS: bmap(): block < 0\n"); | |
| 42 | return 0; | |
| 43 | } | |
| 44 | ||
| 45 | /* are we about to read past the end of a file ? */ | |
| 46 | if (!(block < inode->i_blocks)) { | |
| 47 | #ifdef DEBUG | |
| 48 | /* | |
| 49 | * i have no idea why this happens as often as it does | |
| 50 | */ | |
| 51 | printk(KERN_WARNING "EFS: bmap(): block %d >= %ld (filesize %ld)\n", | |
| 52 | block, | |
| 53 | inode->i_blocks, | |
| 54 | inode->i_size); | |
| 55 | #endif | |
| 56 | return 0; | |
| 57 | } | |
| 58 | ||
| 59 | return efs_map_block(inode, block); | |
| 60 | } |