static errcode_t create_icache(ext2_filsys fs)
{
errcode_t retval;
if (fs->icache)
return 0;
retval = ext2fs_get_mem(sizeof(struct ext2_inode_cache), &fs->icache);
if (retval)
return retval;
memset(fs->icache, 0, sizeof(struct ext2_inode_cache));
retval = ext2fs_get_mem(fs->blocksize, &fs->icache->buffer);
if (retval) {
ext2fs_free_mem(&fs->icache);
return retval;
}
fs->icache->buffer_blk = 0;
fs->icache->cache_last = -1;
fs->icache->cache_size = 4;
fs->icache->refcount = 1;
retval = ext2fs_get_array(fs->icache->cache_size,
sizeof(struct ext2_inode_cache_ent),
&fs->icache->cache);
if (retval) {
ext2fs_free_mem(&fs->icache->buffer);
ext2fs_free_mem(&fs->icache);
return retval;
}
ext2fs_flush_icache(fs);
return 0;
}
errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd,
int flags EXT2FS_ATTR((unused)))
{
unsigned int group, c, left;
char *buf;
blk_t blk;
ssize_t actual;
errcode_t retval;
buf = malloc(fs->blocksize * BUF_BLOCKS);
if (!buf)
return ENOMEM;
for (group = 0; group < fs->group_desc_count; group++) {
blk = fs->group_desc[(unsigned)group].bg_inode_table;
if (!blk) {
retval = EXT2_ET_MISSING_INODE_TABLE;
goto errout;
}
left = fs->inode_blocks_per_group;
while (left) {
c = BUF_BLOCKS;
if (c > left)
c = left;
actual = read(fd, buf, fs->blocksize * c);
if (actual == -1) {
retval = errno;
goto errout;
}
if (actual != (ssize_t) (fs->blocksize * c)) {
retval = EXT2_ET_SHORT_READ;
goto errout;
}
retval = io_channel_write_blk(fs->io, blk, c, buf);
if (retval)
goto errout;
blk += c;
left -= c;
}
}
retval = ext2fs_flush_icache(fs);
errout:
free(buf);
return retval;
}
errcode_t ext2fs_create_inode_cache(ext2_filsys fs, unsigned int cache_size)
{
unsigned i;
errcode_t retval;
if (fs->icache)
return 0;
retval = ext2fs_get_mem(sizeof(struct ext2_inode_cache), &fs->icache);
if (retval)
return retval;
memset(fs->icache, 0, sizeof(struct ext2_inode_cache));
retval = ext2fs_get_mem(fs->blocksize, &fs->icache->buffer);
if (retval)
goto errout;
fs->icache->buffer_blk = 0;
fs->icache->cache_last = -1;
fs->icache->cache_size = cache_size;
fs->icache->refcount = 1;
retval = ext2fs_get_array(fs->icache->cache_size,
sizeof(struct ext2_inode_cache_ent),
&fs->icache->cache);
if (retval)
goto errout;
for (i = 0; i < fs->icache->cache_size; i++) {
retval = ext2fs_get_mem(EXT2_INODE_SIZE(fs->super),
&fs->icache->cache[i].inode);
if (retval)
goto errout;
}
ext2fs_flush_icache(fs);
return 0;
errout:
ext2fs_free_inode_cache(fs->icache);
fs->icache = 0;
return retval;
}
static void swap_inodes(e2fsck_t ctx)
{
ext2_filsys fs = ctx->fs;
dgrp_t group;
unsigned int i;
ext2_ino_t ino = 1;
char *buf = NULL, *block_buf = NULL;
errcode_t retval;
struct ext2_inode * inode;
e2fsck_use_inode_shortcuts(ctx, 1);
retval = ext2fs_get_array(fs->blocksize, fs->inode_blocks_per_group,
&buf);
if (retval) {
com_err("swap_inodes", retval,
_("while allocating inode buffer"));
ctx->flags |= E2F_FLAG_ABORT;
goto errout;
}
block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
"block interate buffer");
for (group = 0; group < fs->group_desc_count; group++) {
retval = io_channel_read_blk(fs->io,
fs->group_desc[group].bg_inode_table,
fs->inode_blocks_per_group, buf);
if (retval) {
com_err("swap_inodes", retval,
_("while reading inode table (group %d)"),
group);
ctx->flags |= E2F_FLAG_ABORT;
goto errout;
}
inode = (struct ext2_inode *) buf;
for (i=0; i < fs->super->s_inodes_per_group;
i++, ino++, inode++) {
ctx->stashed_ino = ino;
ctx->stashed_inode = inode;
if (fs->flags & EXT2_FLAG_SWAP_BYTES_READ)
ext2fs_swap_inode(fs, inode, inode, 0);
/*
* Skip deleted files.
*/
if (inode->i_links_count == 0)
continue;
if (LINUX_S_ISDIR(inode->i_mode) ||
((inode->i_block[EXT2_IND_BLOCK] ||
inode->i_block[EXT2_DIND_BLOCK] ||
inode->i_block[EXT2_TIND_BLOCK]) &&
ext2fs_inode_has_valid_blocks(inode)))
swap_inode_blocks(ctx, ino, block_buf, inode);
if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
goto errout;
if (fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE)
ext2fs_swap_inode(fs, inode, inode, 1);
}
retval = io_channel_write_blk(fs->io,
fs->group_desc[group].bg_inode_table,
fs->inode_blocks_per_group, buf);
if (retval) {
com_err("swap_inodes", retval,
_("while writing inode table (group %d)"),
group);
ctx->flags |= E2F_FLAG_ABORT;
goto errout;
}
}
errout:
if (buf)
ext2fs_free_mem(&buf);
if (block_buf)
ext2fs_free_mem(&block_buf);
e2fsck_use_inode_shortcuts(ctx, 0);
ext2fs_flush_icache(fs);
}
