diff options
author | Denis Vlasenko <vda.linux@googlemail.com> | 2006-12-26 01:25:48 +0000 |
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committer | Denis Vlasenko <vda.linux@googlemail.com> | 2006-12-26 01:25:48 +0000 |
commit | 64c54025842f205ad722675105b88044a5b6845a (patch) | |
tree | 9b5361a46d9174b8c4c12947b006acbca33dc24c /e2fsprogs/ext2fs/bmap.c | |
parent | d63c3a032ade4d7a1953031d787eed044811b78c (diff) |
remove e2fsprogs. Nobody volunteered to clean up that mess
Diffstat (limited to 'e2fsprogs/ext2fs/bmap.c')
-rw-r--r-- | e2fsprogs/ext2fs/bmap.c | 264 |
1 files changed, 0 insertions, 264 deletions
diff --git a/e2fsprogs/ext2fs/bmap.c b/e2fsprogs/ext2fs/bmap.c deleted file mode 100644 index b22fe3dbf..000000000 --- a/e2fsprogs/ext2fs/bmap.c +++ /dev/null @@ -1,264 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * bmap.c --- logical to physical block mapping - * - * Copyright (C) 1997 Theodore Ts'o. - * - * %Begin-Header% - * This file may be redistributed under the terms of the GNU Public - * License. - * %End-Header% - */ - -#include <stdio.h> -#include <string.h> -#if HAVE_UNISTD_H -#include <unistd.h> -#endif - -#include "ext2_fs.h" -#include "ext2fs.h" - -extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino, - struct ext2_inode *inode, - char *block_buf, int bmap_flags, - blk_t block, blk_t *phys_blk); - -#define inode_bmap(inode, nr) ((inode)->i_block[(nr)]) - -static errcode_t block_ind_bmap(ext2_filsys fs, int flags, - blk_t ind, char *block_buf, - int *blocks_alloc, - blk_t nr, blk_t *ret_blk) -{ - errcode_t retval; - blk_t b; - - if (!ind) { - if (flags & BMAP_SET) - return EXT2_ET_SET_BMAP_NO_IND; - *ret_blk = 0; - return 0; - } - retval = io_channel_read_blk(fs->io, ind, 1, block_buf); - if (retval) - return retval; - - if (flags & BMAP_SET) { - b = *ret_blk; -#if BB_BIG_ENDIAN - if ((fs->flags & EXT2_FLAG_SWAP_BYTES) || - (fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE)) - b = ext2fs_swab32(b); -#endif - ((blk_t *) block_buf)[nr] = b; - return io_channel_write_blk(fs->io, ind, 1, block_buf); - } - - b = ((blk_t *) block_buf)[nr]; - -#if BB_BIG_ENDIAN - if ((fs->flags & EXT2_FLAG_SWAP_BYTES) || - (fs->flags & EXT2_FLAG_SWAP_BYTES_READ)) - b = ext2fs_swab32(b); -#endif - - if (!b && (flags & BMAP_ALLOC)) { - b = nr ? ((blk_t *) block_buf)[nr-1] : 0; - retval = ext2fs_alloc_block(fs, b, - block_buf + fs->blocksize, &b); - if (retval) - return retval; - -#if BB_BIG_ENDIAN - if ((fs->flags & EXT2_FLAG_SWAP_BYTES) || - (fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE)) - ((blk_t *) block_buf)[nr] = ext2fs_swab32(b); - else -#endif - ((blk_t *) block_buf)[nr] = b; - - retval = io_channel_write_blk(fs->io, ind, 1, block_buf); - if (retval) - return retval; - - (*blocks_alloc)++; - } - - *ret_blk = b; - return 0; -} - -static errcode_t block_dind_bmap(ext2_filsys fs, int flags, - blk_t dind, char *block_buf, - int *blocks_alloc, - blk_t nr, blk_t *ret_blk) -{ - blk_t b; - errcode_t retval; - blk_t addr_per_block; - - addr_per_block = (blk_t) fs->blocksize >> 2; - - retval = block_ind_bmap(fs, flags & ~BMAP_SET, dind, block_buf, - blocks_alloc, nr / addr_per_block, &b); - if (retval) - return retval; - retval = block_ind_bmap(fs, flags, b, block_buf, blocks_alloc, - nr % addr_per_block, ret_blk); - return retval; -} - -static errcode_t block_tind_bmap(ext2_filsys fs, int flags, - blk_t tind, char *block_buf, - int *blocks_alloc, - blk_t nr, blk_t *ret_blk) -{ - blk_t b; - errcode_t retval; - blk_t addr_per_block; - - addr_per_block = (blk_t) fs->blocksize >> 2; - - retval = block_dind_bmap(fs, flags & ~BMAP_SET, tind, block_buf, - blocks_alloc, nr / addr_per_block, &b); - if (retval) - return retval; - retval = block_ind_bmap(fs, flags, b, block_buf, blocks_alloc, - nr % addr_per_block, ret_blk); - return retval; -} - -errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino, struct ext2_inode *inode, - char *block_buf, int bmap_flags, blk_t block, - blk_t *phys_blk) -{ - struct ext2_inode inode_buf; - blk_t addr_per_block; - blk_t b; - char *buf = 0; - errcode_t retval = 0; - int blocks_alloc = 0, inode_dirty = 0; - - if (!(bmap_flags & BMAP_SET)) - *phys_blk = 0; - - /* Read inode structure if necessary */ - if (!inode) { - retval = ext2fs_read_inode(fs, ino, &inode_buf); - if (retval) - return retval; - inode = &inode_buf; - } - addr_per_block = (blk_t) fs->blocksize >> 2; - - if (!block_buf) { - retval = ext2fs_get_mem(fs->blocksize * 2, &buf); - if (retval) - return retval; - block_buf = buf; - } - - if (block < EXT2_NDIR_BLOCKS) { - if (bmap_flags & BMAP_SET) { - b = *phys_blk; -#if BB_BIG_ENDIAN - if ((fs->flags & EXT2_FLAG_SWAP_BYTES) || - (fs->flags & EXT2_FLAG_SWAP_BYTES_READ)) - b = ext2fs_swab32(b); -#endif - inode_bmap(inode, block) = b; - inode_dirty++; - goto done; - } - - *phys_blk = inode_bmap(inode, block); - b = block ? inode_bmap(inode, block-1) : 0; - - if ((*phys_blk == 0) && (bmap_flags & BMAP_ALLOC)) { - retval = ext2fs_alloc_block(fs, b, block_buf, &b); - if (retval) - goto done; - inode_bmap(inode, block) = b; - blocks_alloc++; - *phys_blk = b; - } - goto done; - } - - /* Indirect block */ - block -= EXT2_NDIR_BLOCKS; - if (block < addr_per_block) { - b = inode_bmap(inode, EXT2_IND_BLOCK); - if (!b) { - if (!(bmap_flags & BMAP_ALLOC)) { - if (bmap_flags & BMAP_SET) - retval = EXT2_ET_SET_BMAP_NO_IND; - goto done; - } - - b = inode_bmap(inode, EXT2_IND_BLOCK-1); - retval = ext2fs_alloc_block(fs, b, block_buf, &b); - if (retval) - goto done; - inode_bmap(inode, EXT2_IND_BLOCK) = b; - blocks_alloc++; - } - retval = block_ind_bmap(fs, bmap_flags, b, block_buf, - &blocks_alloc, block, phys_blk); - goto done; - } - - /* Doubly indirect block */ - block -= addr_per_block; - if (block < addr_per_block * addr_per_block) { - b = inode_bmap(inode, EXT2_DIND_BLOCK); - if (!b) { - if (!(bmap_flags & BMAP_ALLOC)) { - if (bmap_flags & BMAP_SET) - retval = EXT2_ET_SET_BMAP_NO_IND; - goto done; - } - - b = inode_bmap(inode, EXT2_IND_BLOCK); - retval = ext2fs_alloc_block(fs, b, block_buf, &b); - if (retval) - goto done; - inode_bmap(inode, EXT2_DIND_BLOCK) = b; - blocks_alloc++; - } - retval = block_dind_bmap(fs, bmap_flags, b, block_buf, - &blocks_alloc, block, phys_blk); - goto done; - } - - /* Triply indirect block */ - block -= addr_per_block * addr_per_block; - b = inode_bmap(inode, EXT2_TIND_BLOCK); - if (!b) { - if (!(bmap_flags & BMAP_ALLOC)) { - if (bmap_flags & BMAP_SET) - retval = EXT2_ET_SET_BMAP_NO_IND; - goto done; - } - - b = inode_bmap(inode, EXT2_DIND_BLOCK); - retval = ext2fs_alloc_block(fs, b, block_buf, &b); - if (retval) - goto done; - inode_bmap(inode, EXT2_TIND_BLOCK) = b; - blocks_alloc++; - } - retval = block_tind_bmap(fs, bmap_flags, b, block_buf, - &blocks_alloc, block, phys_blk); -done: - ext2fs_free_mem(&buf); - if ((retval == 0) && (blocks_alloc || inode_dirty)) { - inode->i_blocks += (blocks_alloc * fs->blocksize) / 512; - retval = ext2fs_write_inode(fs, ino, inode); - } - return retval; -} - - - |