put small subset of e2fsprogs back in the tree:
lsattr, chattr, fsck. Old e2fsprogs tree is in e2fsprogs/old_e2fsprogs/*.
This commit is contained in:
Denis Vlasenko
196
e2fsprogs/old_e2fsprogs/ext2fs/brel_ma.c
Normal file
196
e2fsprogs/old_e2fsprogs/ext2fs/brel_ma.c
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@@ -0,0 +1,196 @@
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/* vi: set sw=4 ts=4: */
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/*
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* brel_ma.c
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*
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* Copyright (C) 1996, 1997 Theodore Ts'o.
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*
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* TODO: rewrite to not use a direct array!!! (Fortunately this
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* module isn't really used yet.)
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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*/
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#include "ext2_fs.h"
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#include "ext2fs.h"
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#include "brel.h"
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static errcode_t bma_put(ext2_brel brel, blk_t old,
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struct ext2_block_relocate_entry *ent);
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static errcode_t bma_get(ext2_brel brel, blk_t old,
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struct ext2_block_relocate_entry *ent);
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static errcode_t bma_start_iter(ext2_brel brel);
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static errcode_t bma_next(ext2_brel brel, blk_t *old,
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struct ext2_block_relocate_entry *ent);
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static errcode_t bma_move(ext2_brel brel, blk_t old, blk_t new);
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static errcode_t bma_delete(ext2_brel brel, blk_t old);
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static errcode_t bma_free(ext2_brel brel);
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struct brel_ma {
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__u32 magic;
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blk_t max_block;
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struct ext2_block_relocate_entry *entries;
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};
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errcode_t ext2fs_brel_memarray_create(char *name, blk_t max_block,
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ext2_brel *new_brel)
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{
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ext2_brel brel = 0;
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errcode_t retval;
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struct brel_ma *ma = 0;
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size_t size;
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*new_brel = 0;
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/*
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* Allocate memory structures
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*/
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retval = ext2fs_get_mem(sizeof(struct ext2_block_relocation_table),
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&brel);
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if (retval)
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goto errout;
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memset(brel, 0, sizeof(struct ext2_block_relocation_table));
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retval = ext2fs_get_mem(strlen(name)+1, &brel->name);
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if (retval)
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goto errout;
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strcpy(brel->name, name);
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retval = ext2fs_get_mem(sizeof(struct brel_ma), &ma);
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if (retval)
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goto errout;
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memset(ma, 0, sizeof(struct brel_ma));
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brel->priv_data = ma;
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size = (size_t) (sizeof(struct ext2_block_relocate_entry) *
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(max_block+1));
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retval = ext2fs_get_mem(size, &ma->entries);
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if (retval)
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goto errout;
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memset(ma->entries, 0, size);
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ma->max_block = max_block;
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/*
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* Fill in the brel data structure
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*/
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brel->put = bma_put;
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brel->get = bma_get;
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brel->start_iter = bma_start_iter;
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brel->next = bma_next;
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brel->move = bma_move;
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brel->delete = bma_delete;
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brel->free = bma_free;
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*new_brel = brel;
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return 0;
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errout:
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bma_free(brel);
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return retval;
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}
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static errcode_t bma_put(ext2_brel brel, blk_t old,
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struct ext2_block_relocate_entry *ent)
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{
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struct brel_ma *ma;
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ma = brel->priv_data;
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if (old > ma->max_block)
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return EXT2_ET_INVALID_ARGUMENT;
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ma->entries[(unsigned)old] = *ent;
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return 0;
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}
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static errcode_t bma_get(ext2_brel brel, blk_t old,
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struct ext2_block_relocate_entry *ent)
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{
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struct brel_ma *ma;
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ma = brel->priv_data;
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if (old > ma->max_block)
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return EXT2_ET_INVALID_ARGUMENT;
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if (ma->entries[(unsigned)old].new == 0)
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return ENOENT;
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*ent = ma->entries[old];
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return 0;
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}
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static errcode_t bma_start_iter(ext2_brel brel)
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{
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brel->current = 0;
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return 0;
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}
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static errcode_t bma_next(ext2_brel brel, blk_t *old,
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struct ext2_block_relocate_entry *ent)
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{
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struct brel_ma *ma;
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ma = brel->priv_data;
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while (++brel->current < ma->max_block) {
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if (ma->entries[(unsigned)brel->current].new == 0)
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continue;
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*old = brel->current;
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*ent = ma->entries[(unsigned)brel->current];
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return 0;
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}
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*old = 0;
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return 0;
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}
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static errcode_t bma_move(ext2_brel brel, blk_t old, blk_t new)
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{
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struct brel_ma *ma;
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ma = brel->priv_data;
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if ((old > ma->max_block) || (new > ma->max_block))
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return EXT2_ET_INVALID_ARGUMENT;
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if (ma->entries[(unsigned)old].new == 0)
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return ENOENT;
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ma->entries[(unsigned)new] = ma->entries[old];
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ma->entries[(unsigned)old].new = 0;
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return 0;
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}
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static errcode_t bma_delete(ext2_brel brel, blk_t old)
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{
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struct brel_ma *ma;
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ma = brel->priv_data;
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if (old > ma->max_block)
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return EXT2_ET_INVALID_ARGUMENT;
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if (ma->entries[(unsigned)old].new == 0)
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return ENOENT;
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ma->entries[(unsigned)old].new = 0;
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return 0;
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}
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static errcode_t bma_free(ext2_brel brel)
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{
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struct brel_ma *ma;
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if (!brel)
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return 0;
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ma = brel->priv_data;
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if (ma) {
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ext2fs_free_mem(&ma->entries);
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ext2fs_free_mem(&ma);
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}
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ext2fs_free_mem(&brel->name);
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ext2fs_free_mem(&brel);
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return 0;
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}
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