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
367
e2fsprogs/old_e2fsprogs/ext2fs/irel_ma.c
Normal file
367
e2fsprogs/old_e2fsprogs/ext2fs/irel_ma.c
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@ -0,0 +1,367 @@
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/* vi: set sw=4 ts=4: */
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/*
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* irel_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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* %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 "irel.h"
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static errcode_t ima_put(ext2_irel irel, ext2_ino_t old,
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struct ext2_inode_relocate_entry *ent);
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static errcode_t ima_get(ext2_irel irel, ext2_ino_t old,
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struct ext2_inode_relocate_entry *ent);
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static errcode_t ima_get_by_orig(ext2_irel irel, ext2_ino_t orig, ext2_ino_t *old,
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struct ext2_inode_relocate_entry *ent);
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static errcode_t ima_start_iter(ext2_irel irel);
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static errcode_t ima_next(ext2_irel irel, ext2_ino_t *old,
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struct ext2_inode_relocate_entry *ent);
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static errcode_t ima_add_ref(ext2_irel irel, ext2_ino_t ino,
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struct ext2_inode_reference *ref);
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static errcode_t ima_start_iter_ref(ext2_irel irel, ext2_ino_t ino);
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static errcode_t ima_next_ref(ext2_irel irel, struct ext2_inode_reference *ref);
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static errcode_t ima_move(ext2_irel irel, ext2_ino_t old, ext2_ino_t new);
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static errcode_t ima_delete(ext2_irel irel, ext2_ino_t old);
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static errcode_t ima_free(ext2_irel irel);
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/*
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* This data structure stores the array of inode references; there is
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* a structure for each inode.
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*/
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struct inode_reference_entry {
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__u16 num;
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struct ext2_inode_reference *refs;
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};
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struct irel_ma {
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__u32 magic;
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ext2_ino_t max_inode;
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ext2_ino_t ref_current;
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int ref_iter;
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ext2_ino_t *orig_map;
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struct ext2_inode_relocate_entry *entries;
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struct inode_reference_entry *ref_entries;
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};
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errcode_t ext2fs_irel_memarray_create(char *name, ext2_ino_t max_inode,
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ext2_irel *new_irel)
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{
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ext2_irel irel = 0;
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errcode_t retval;
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struct irel_ma *ma = 0;
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size_t size;
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*new_irel = 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_inode_relocation_table),
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&irel);
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if (retval)
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goto errout;
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memset(irel, 0, sizeof(struct ext2_inode_relocation_table));
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retval = ext2fs_get_mem(strlen(name)+1, &irel->name);
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if (retval)
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goto errout;
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strcpy(irel->name, name);
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retval = ext2fs_get_mem(sizeof(struct irel_ma), &ma);
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if (retval)
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goto errout;
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memset(ma, 0, sizeof(struct irel_ma));
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irel->priv_data = ma;
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size = (size_t) (sizeof(ext2_ino_t) * (max_inode+1));
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retval = ext2fs_get_mem(size, &ma->orig_map);
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if (retval)
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goto errout;
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memset(ma->orig_map, 0, size);
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size = (size_t) (sizeof(struct ext2_inode_relocate_entry) *
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(max_inode+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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size = (size_t) (sizeof(struct inode_reference_entry) *
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(max_inode+1));
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retval = ext2fs_get_mem(size, &ma->ref_entries);
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if (retval)
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goto errout;
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memset(ma->ref_entries, 0, size);
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ma->max_inode = max_inode;
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/*
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* Fill in the irel data structure
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*/
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irel->put = ima_put;
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irel->get = ima_get;
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irel->get_by_orig = ima_get_by_orig;
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irel->start_iter = ima_start_iter;
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irel->next = ima_next;
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irel->add_ref = ima_add_ref;
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irel->start_iter_ref = ima_start_iter_ref;
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irel->next_ref = ima_next_ref;
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irel->move = ima_move;
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irel->delete = ima_delete;
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irel->free = ima_free;
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*new_irel = irel;
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return 0;
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errout:
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ima_free(irel);
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return retval;
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}
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static errcode_t ima_put(ext2_irel irel, ext2_ino_t old,
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struct ext2_inode_relocate_entry *ent)
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{
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struct inode_reference_entry *ref_ent;
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struct irel_ma *ma;
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errcode_t retval;
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size_t size, old_size;
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ma = irel->priv_data;
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if (old > ma->max_inode)
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return EXT2_ET_INVALID_ARGUMENT;
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/*
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* Force the orig field to the correct value; the application
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* program shouldn't be messing with this field.
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*/
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if (ma->entries[(unsigned) old].new == 0)
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ent->orig = old;
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else
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ent->orig = ma->entries[(unsigned) old].orig;
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/*
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* If max_refs has changed, reallocate the refs array
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*/
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ref_ent = ma->ref_entries + (unsigned) old;
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if (ref_ent->refs && ent->max_refs !=
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ma->entries[(unsigned) old].max_refs) {
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size = (sizeof(struct ext2_inode_reference) * ent->max_refs);
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old_size = (sizeof(struct ext2_inode_reference) *
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ma->entries[(unsigned) old].max_refs);
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retval = ext2fs_resize_mem(old_size, size, &ref_ent->refs);
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if (retval)
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return retval;
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}
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ma->entries[(unsigned) old] = *ent;
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ma->orig_map[(unsigned) ent->orig] = old;
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return 0;
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}
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static errcode_t ima_get(ext2_irel irel, ext2_ino_t old,
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struct ext2_inode_relocate_entry *ent)
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{
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struct irel_ma *ma;
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ma = irel->priv_data;
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if (old > ma->max_inode)
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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[(unsigned) old];
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return 0;
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}
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static errcode_t ima_get_by_orig(ext2_irel irel, ext2_ino_t orig, ext2_ino_t *old,
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struct ext2_inode_relocate_entry *ent)
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{
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struct irel_ma *ma;
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ext2_ino_t ino;
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ma = irel->priv_data;
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if (orig > ma->max_inode)
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return EXT2_ET_INVALID_ARGUMENT;
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ino = ma->orig_map[(unsigned) orig];
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if (ino == 0)
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return ENOENT;
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*old = ino;
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*ent = ma->entries[(unsigned) ino];
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return 0;
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}
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static errcode_t ima_start_iter(ext2_irel irel)
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{
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irel->current = 0;
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return 0;
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}
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static errcode_t ima_next(ext2_irel irel, ext2_ino_t *old,
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struct ext2_inode_relocate_entry *ent)
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{
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struct irel_ma *ma;
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ma = irel->priv_data;
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while (++irel->current < ma->max_inode) {
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if (ma->entries[(unsigned) irel->current].new == 0)
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continue;
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*old = irel->current;
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*ent = ma->entries[(unsigned) irel->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 ima_add_ref(ext2_irel irel, ext2_ino_t ino,
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struct ext2_inode_reference *ref)
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{
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struct irel_ma *ma;
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size_t size;
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struct inode_reference_entry *ref_ent;
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struct ext2_inode_relocate_entry *ent;
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errcode_t retval;
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ma = irel->priv_data;
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if (ino > ma->max_inode)
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return EXT2_ET_INVALID_ARGUMENT;
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ref_ent = ma->ref_entries + (unsigned) ino;
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ent = ma->entries + (unsigned) ino;
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/*
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* If the inode reference array doesn't exist, create it.
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*/
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if (ref_ent->refs == 0) {
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size = (size_t) ((sizeof(struct ext2_inode_reference) *
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ent->max_refs));
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retval = ext2fs_get_mem(size, &ref_ent->refs);
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if (retval)
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return retval;
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memset(ref_ent->refs, 0, size);
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ref_ent->num = 0;
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}
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if (ref_ent->num >= ent->max_refs)
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return EXT2_ET_TOO_MANY_REFS;
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ref_ent->refs[(unsigned) ref_ent->num++] = *ref;
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return 0;
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}
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static errcode_t ima_start_iter_ref(ext2_irel irel, ext2_ino_t ino)
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{
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struct irel_ma *ma;
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ma = irel->priv_data;
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if (ino > ma->max_inode)
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return EXT2_ET_INVALID_ARGUMENT;
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if (ma->entries[(unsigned) ino].new == 0)
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return ENOENT;
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ma->ref_current = ino;
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ma->ref_iter = 0;
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return 0;
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}
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static errcode_t ima_next_ref(ext2_irel irel,
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struct ext2_inode_reference *ref)
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{
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struct irel_ma *ma;
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struct inode_reference_entry *ref_ent;
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ma = irel->priv_data;
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ref_ent = ma->ref_entries + ma->ref_current;
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if ((ref_ent->refs == NULL) ||
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(ma->ref_iter >= ref_ent->num)) {
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ref->block = 0;
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ref->offset = 0;
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return 0;
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}
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*ref = ref_ent->refs[ma->ref_iter++];
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return 0;
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}
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static errcode_t ima_move(ext2_irel irel, ext2_ino_t old, ext2_ino_t new)
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{
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struct irel_ma *ma;
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ma = irel->priv_data;
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if ((old > ma->max_inode) || (new > ma->max_inode))
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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[(unsigned) old];
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ext2fs_free_mem(&ma->ref_entries[(unsigned) new].refs);
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ma->ref_entries[(unsigned) new] = ma->ref_entries[(unsigned) old];
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ma->entries[(unsigned) old].new = 0;
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ma->ref_entries[(unsigned) old].num = 0;
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ma->ref_entries[(unsigned) old].refs = 0;
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ma->orig_map[ma->entries[new].orig] = new;
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return 0;
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}
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static errcode_t ima_delete(ext2_irel irel, ext2_ino_t old)
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{
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struct irel_ma *ma;
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ma = irel->priv_data;
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if (old > ma->max_inode)
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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[old].new = 0;
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ext2fs_free_mem(&ma->ref_entries[(unsigned) old].refs);
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ma->orig_map[ma->entries[(unsigned) old].orig] = 0;
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ma->ref_entries[(unsigned) old].num = 0;
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ma->ref_entries[(unsigned) old].refs = 0;
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return 0;
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}
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static errcode_t ima_free(ext2_irel irel)
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{
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struct irel_ma *ma;
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ext2_ino_t ino;
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if (!irel)
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return 0;
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ma = irel->priv_data;
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if (ma) {
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ext2fs_free_mem(&ma->orig_map);
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ext2fs_free_mem(&ma->entries);
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if (ma->ref_entries) {
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for (ino = 0; ino <= ma->max_inode; ino++) {
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ext2fs_free_mem(&ma->ref_entries[(unsigned) ino].refs);
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}
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ext2fs_free_mem(&ma->ref_entries);
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}
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ext2fs_free_mem(&ma);
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}
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ext2fs_free_mem(&irel->name);
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ext2fs_free_mem(&irel);
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return 0;
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}
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Reference in New Issue
Block a user