summaryrefslogtreecommitdiff
path: root/e2fslib/inode.c
diff options
context:
space:
mode:
Diffstat (limited to 'e2fslib/inode.c')
-rw-r--r--e2fslib/inode.c724
1 files changed, 0 insertions, 724 deletions
diff --git a/e2fslib/inode.c b/e2fslib/inode.c
deleted file mode 100644
index 2da328c..0000000
--- a/e2fslib/inode.c
+++ /dev/null
@@ -1,724 +0,0 @@
-/*
- * inode.c --- utility routines to read and write inodes
- *
- * Copyright (C) 1993, 1994, 1995, 1996, 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
-#if HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-#if HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-
-#include "ext2_fs.h"
-#include "ext2fsP.h"
-#include "e2image.h"
-
-struct ext2_struct_inode_scan {
- errcode_t magic;
- ext2_filsys fs;
- ext2_ino_t current_inode;
- blk_t current_block;
- dgrp_t current_group;
- ext2_ino_t inodes_left;
- blk_t blocks_left;
- dgrp_t groups_left;
- blk_t inode_buffer_blocks;
- char * inode_buffer;
- int inode_size;
- char * ptr;
- int bytes_left;
- char *temp_buffer;
- errcode_t (*done_group)(ext2_filsys fs,
- ext2_inode_scan scan,
- dgrp_t group,
- void * priv_data);
- void * done_group_data;
- int bad_block_ptr;
- int scan_flags;
- int reserved[6];
-};
-
-/*
- * This routine flushes the icache, if it exists.
- */
-errcode_t ext2fs_flush_icache(ext2_filsys fs)
-{
- int i;
-
- if (!fs->icache)
- return 0;
-
- for (i=0; i < fs->icache->cache_size; i++)
- fs->icache->cache[i].ino = 0;
-
- return 0;
-}
-
-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),
- (void **) &fs->icache);
- if (retval)
- return retval;
-
- memset(fs->icache, 0, sizeof(struct ext2_inode_cache));
- retval = ext2fs_get_mem(fs->blocksize, (void **) &fs->icache->buffer);
- if (retval) {
- ext2fs_free_mem((void **) &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_mem(sizeof(struct ext2_inode_cache_ent)
- * fs->icache->cache_size,
- (void **) &fs->icache->cache);
- if (retval) {
- ext2fs_free_mem((void **) &fs->icache->buffer);
- ext2fs_free_mem((void **) &fs->icache);
- return retval;
- }
- ext2fs_flush_icache(fs);
- return 0;
-}
-
-errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks,
- ext2_inode_scan *ret_scan)
-{
- ext2_inode_scan scan;
- errcode_t retval;
- errcode_t (*save_get_blocks)(ext2_filsys f, ext2_ino_t ino, blk_t *blocks);
-
- EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
-
- /*
- * If fs->badblocks isn't set, then set it --- since the inode
- * scanning functions require it.
- */
- if (fs->badblocks == 0) {
- /*
- * Temporarly save fs->get_blocks and set it to zero,
- * for compatibility with old e2fsck's.
- */
- save_get_blocks = fs->get_blocks;
- fs->get_blocks = 0;
- retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
- if (retval && fs->badblocks) {
- ext2fs_badblocks_list_free(fs->badblocks);
- fs->badblocks = 0;
- }
- fs->get_blocks = save_get_blocks;
- }
-
- retval = ext2fs_get_mem(sizeof(struct ext2_struct_inode_scan),
- (void **) &scan);
- if (retval)
- return retval;
- memset(scan, 0, sizeof(struct ext2_struct_inode_scan));
-
- scan->magic = EXT2_ET_MAGIC_INODE_SCAN;
- scan->fs = fs;
- scan->inode_size = EXT2_INODE_SIZE(fs->super);
- scan->bytes_left = 0;
- scan->current_group = 0;
- scan->groups_left = fs->group_desc_count - 1;
- scan->inode_buffer_blocks = buffer_blocks ? buffer_blocks : 8;
- scan->current_block = scan->fs->
- group_desc[scan->current_group].bg_inode_table;
- scan->inodes_left = EXT2_INODES_PER_GROUP(scan->fs->super);
- scan->blocks_left = scan->fs->inode_blocks_per_group;
- retval = ext2fs_get_mem((size_t) (scan->inode_buffer_blocks *
- fs->blocksize),
- (void **) &scan->inode_buffer);
- scan->done_group = 0;
- scan->done_group_data = 0;
- scan->bad_block_ptr = 0;
- if (retval) {
- ext2fs_free_mem((void **) &scan);
- return retval;
- }
- retval = ext2fs_get_mem(scan->inode_size,
- (void **) &scan->temp_buffer);
- if (retval) {
- ext2fs_free_mem((void **) &scan->inode_buffer);
- ext2fs_free_mem((void **) &scan);
- return retval;
- }
- if (scan->fs->badblocks && scan->fs->badblocks->num)
- scan->scan_flags |= EXT2_SF_CHK_BADBLOCKS;
- *ret_scan = scan;
- return 0;
-}
-
-void ext2fs_close_inode_scan(ext2_inode_scan scan)
-{
- if (!scan || (scan->magic != EXT2_ET_MAGIC_INODE_SCAN))
- return;
-
- ext2fs_free_mem((void **) &scan->inode_buffer);
- scan->inode_buffer = NULL;
- ext2fs_free_mem((void **) &scan->temp_buffer);
- scan->temp_buffer = NULL;
- ext2fs_free_mem((void **) &scan);
- return;
-}
-
-void ext2fs_set_inode_callback(ext2_inode_scan scan,
- errcode_t (*done_group)(ext2_filsys fs,
- ext2_inode_scan scan,
- dgrp_t group,
- void * priv_data),
- void *done_group_data)
-{
- if (!scan || (scan->magic != EXT2_ET_MAGIC_INODE_SCAN))
- return;
-
- scan->done_group = done_group;
- scan->done_group_data = done_group_data;
-}
-
-int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags,
- int clear_flags)
-{
- int old_flags;
-
- if (!scan || (scan->magic != EXT2_ET_MAGIC_INODE_SCAN))
- return 0;
-
- old_flags = scan->scan_flags;
- scan->scan_flags &= ~clear_flags;
- scan->scan_flags |= set_flags;
- return old_flags;
-}
-
-/*
- * This function is called by ext2fs_get_next_inode when it needs to
- * get ready to read in a new blockgroup.
- */
-static errcode_t get_next_blockgroup(ext2_inode_scan scan)
-{
- scan->current_group++;
- scan->groups_left--;
-
- scan->current_block = scan->fs->
- group_desc[scan->current_group].bg_inode_table;
-
- scan->current_inode = scan->current_group *
- EXT2_INODES_PER_GROUP(scan->fs->super);
-
- scan->bytes_left = 0;
- scan->inodes_left = EXT2_INODES_PER_GROUP(scan->fs->super);
- scan->blocks_left = scan->fs->inode_blocks_per_group;
- return 0;
-}
-
-errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan,
- int group)
-{
- scan->current_group = group - 1;
- scan->groups_left = scan->fs->group_desc_count - group;
- return get_next_blockgroup(scan);
-}
-
-/*
- * This function is called by get_next_blocks() to check for bad
- * blocks in the inode table.
- *
- * This function assumes that badblocks_list->list is sorted in
- * increasing order.
- */
-static errcode_t check_for_inode_bad_blocks(ext2_inode_scan scan,
- blk_t *num_blocks)
-{
- blk_t blk = scan->current_block;
- badblocks_list bb = scan->fs->badblocks;
-
- /*
- * If the inode table is missing, then obviously there are no
- * bad blocks. :-)
- */
- if (blk == 0)
- return 0;
-
- /*
- * If the current block is greater than the bad block listed
- * in the bad block list, then advance the pointer until this
- * is no longer the case. If we run out of bad blocks, then
- * we don't need to do any more checking!
- */
- while (blk > bb->list[scan->bad_block_ptr]) {
- if (++scan->bad_block_ptr >= bb->num) {
- scan->scan_flags &= ~EXT2_SF_CHK_BADBLOCKS;
- return 0;
- }
- }
-
- /*
- * If the current block is equal to the bad block listed in
- * the bad block list, then handle that one block specially.
- * (We could try to handle runs of bad blocks, but that
- * only increases CPU efficiency by a small amount, at the
- * expense of a huge expense of code complexity, and for an
- * uncommon case at that.)
- */
- if (blk == bb->list[scan->bad_block_ptr]) {
- scan->scan_flags |= EXT2_SF_BAD_INODE_BLK;
- *num_blocks = 1;
- if (++scan->bad_block_ptr >= bb->num)
- scan->scan_flags &= ~EXT2_SF_CHK_BADBLOCKS;
- return 0;
- }
-
- /*
- * If there is a bad block in the range that we're about to
- * read in, adjust the number of blocks to read so that we we
- * don't read in the bad block. (Then the next block to read
- * will be the bad block, which is handled in the above case.)
- */
- if ((blk + *num_blocks) > bb->list[scan->bad_block_ptr])
- *num_blocks = (int) (bb->list[scan->bad_block_ptr] - blk);
-
- return 0;
-}
-
-/*
- * This function is called by ext2fs_get_next_inode when it needs to
- * read in more blocks from the current blockgroup's inode table.
- */
-static errcode_t get_next_blocks(ext2_inode_scan scan)
-{
- blk_t num_blocks;
- errcode_t retval;
-
- /*
- * Figure out how many blocks to read; we read at most
- * inode_buffer_blocks, and perhaps less if there aren't that
- * many blocks left to read.
- */
- num_blocks = scan->inode_buffer_blocks;
- if (num_blocks > scan->blocks_left)
- num_blocks = scan->blocks_left;
-
- /*
- * If the past block "read" was a bad block, then mark the
- * left-over extra bytes as also being bad.
- */
- if (scan->scan_flags & EXT2_SF_BAD_INODE_BLK) {
- if (scan->bytes_left)
- scan->scan_flags |= EXT2_SF_BAD_EXTRA_BYTES;
- scan->scan_flags &= ~EXT2_SF_BAD_INODE_BLK;
- }
-
- /*
- * Do inode bad block processing, if necessary.
- */
- if (scan->scan_flags & EXT2_SF_CHK_BADBLOCKS) {
- retval = check_for_inode_bad_blocks(scan, &num_blocks);
- if (retval)
- return retval;
- }
-
- if ((scan->scan_flags & EXT2_SF_BAD_INODE_BLK) ||
- (scan->current_block == 0)) {
- memset(scan->inode_buffer, 0,
- (size_t) num_blocks * scan->fs->blocksize);
- } else {
- retval = io_channel_read_blk(scan->fs->io,
- scan->current_block,
- (int) num_blocks,
- scan->inode_buffer);
- if (retval)
- return EXT2_ET_NEXT_INODE_READ;
- }
- scan->ptr = scan->inode_buffer;
- scan->bytes_left = num_blocks * scan->fs->blocksize;
-
- scan->blocks_left -= num_blocks;
- if (scan->current_block)
- scan->current_block += num_blocks;
- return 0;
-}
-
-#if 0
-/*
- * Returns 1 if the entire inode_buffer has a non-zero size and
- * contains all zeros. (Not just deleted inodes, since that means
- * that part of the inode table was used at one point; we want all
- * zeros, which means that the inode table is pristine.)
- */
-static inline int is_empty_scan(ext2_inode_scan scan)
-{
- int i;
-
- if (scan->bytes_left == 0)
- return 0;
-
- for (i=0; i < scan->bytes_left; i++)
- if (scan->ptr[i])
- return 0;
- return 1;
-}
-#endif
-
-errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino,
- struct ext2_inode *inode)
-{
- errcode_t retval;
- int extra_bytes = 0;
-
- EXT2_CHECK_MAGIC(scan, EXT2_ET_MAGIC_INODE_SCAN);
-
- /*
- * Do we need to start reading a new block group?
- */
- if (scan->inodes_left <= 0) {
- force_new_group:
- if (scan->done_group) {
- retval = (scan->done_group)
- (scan->fs, scan, scan->current_group,
- scan->done_group_data);
- if (retval)
- return retval;
- }
- if (scan->groups_left <= 0) {
- *ino = 0;
- return 0;
- }
- retval = get_next_blockgroup(scan);
- if (retval)
- return retval;
- }
- /*
- * This is done outside the above if statement so that the
- * check can be done for block group #0.
- */
- if (scan->current_block == 0) {
- if (scan->scan_flags & EXT2_SF_SKIP_MISSING_ITABLE) {
- goto force_new_group;
- } else
- return EXT2_ET_MISSING_INODE_TABLE;
- }
-
-
- /*
- * Have we run out of space in the inode buffer? If so, we
- * need to read in more blocks.
- */
- if (scan->bytes_left < scan->inode_size) {
- memcpy(scan->temp_buffer, scan->ptr, scan->bytes_left);
- extra_bytes = scan->bytes_left;
-
- retval = get_next_blocks(scan);
- if (retval)
- return retval;
-#if 0
- /*
- * XXX test Need check for used inode somehow.
- * (Note: this is hard.)
- */
- if (is_empty_scan(scan))
- goto force_new_group;
-#endif
- }
-
- retval = 0;
- if (extra_bytes) {
- memcpy(scan->temp_buffer+extra_bytes, scan->ptr,
- scan->inode_size - extra_bytes);
- scan->ptr += scan->inode_size - extra_bytes;
- scan->bytes_left -= scan->inode_size - extra_bytes;
-
-#ifdef EXT2FS_ENABLE_SWAPFS
- if ((scan->fs->flags & EXT2_FLAG_SWAP_BYTES) ||
- (scan->fs->flags & EXT2_FLAG_SWAP_BYTES_READ))
- ext2fs_swap_inode(scan->fs, inode,
- (struct ext2_inode *) scan->temp_buffer, 0);
- else
-#endif
- *inode = *((struct ext2_inode *) scan->temp_buffer);
- if (scan->scan_flags & EXT2_SF_BAD_EXTRA_BYTES)
- retval = EXT2_ET_BAD_BLOCK_IN_INODE_TABLE;
- scan->scan_flags &= ~EXT2_SF_BAD_EXTRA_BYTES;
- } else {
-#ifdef EXT2FS_ENABLE_SWAPFS
- if ((scan->fs->flags & EXT2_FLAG_SWAP_BYTES) ||
- (scan->fs->flags & EXT2_FLAG_SWAP_BYTES_READ))
- ext2fs_swap_inode(scan->fs, inode,
- (struct ext2_inode *) scan->ptr, 0);
- else
-#endif
- *inode = *((struct ext2_inode *) scan->ptr);
- scan->ptr += scan->inode_size;
- scan->bytes_left -= scan->inode_size;
- if (scan->scan_flags & EXT2_SF_BAD_INODE_BLK)
- retval = EXT2_ET_BAD_BLOCK_IN_INODE_TABLE;
- }
-
- scan->inodes_left--;
- scan->current_inode++;
- *ino = scan->current_inode;
- return retval;
-}
-
-/*
- * Functions to read and write a single inode.
- */
-errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino,
- struct ext2_inode * inode)
-{
- unsigned long group, block, block_nr, offset;
- char *ptr;
- errcode_t retval;
- int clen, length, i, inodes_per_block;
-
- EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
-
- /* Check to see if user has an override function */
- if (fs->read_inode) {
- retval = (fs->read_inode)(fs, ino, inode);
- if (retval != EXT2_ET_CALLBACK_NOTHANDLED)
- return retval;
- }
- /* Create inode cache if not present */
- if (!fs->icache) {
- retval = create_icache(fs);
- if (retval)
- return retval;
- }
- /* Check to see if it's in the inode cache */
- for (i=0; i < fs->icache->cache_size; i++) {
- if (fs->icache->cache[i].ino == ino) {
- *inode = fs->icache->cache[i].inode;
- return 0;
- }
- }
- if ((ino == 0) || (ino > fs->super->s_inodes_count))
- return EXT2_ET_BAD_INODE_NUM;
- if (fs->flags & EXT2_FLAG_IMAGE_FILE) {
- inodes_per_block = fs->blocksize / EXT2_INODE_SIZE(fs->super);
- block_nr = fs->image_header->offset_inode / fs->blocksize;
- block_nr += (ino - 1) / inodes_per_block;
- offset = ((ino - 1) % inodes_per_block) *
- EXT2_INODE_SIZE(fs->super);
- } else {
- group = (ino - 1) / EXT2_INODES_PER_GROUP(fs->super);
- offset = ((ino - 1) % EXT2_INODES_PER_GROUP(fs->super)) *
- EXT2_INODE_SIZE(fs->super);
- block = offset >> EXT2_BLOCK_SIZE_BITS(fs->super);
- if (!fs->group_desc[(unsigned)group].bg_inode_table)
- return EXT2_ET_MISSING_INODE_TABLE;
- block_nr = fs->group_desc[(unsigned)group].bg_inode_table +
- block;
- }
- if (block_nr != fs->icache->buffer_blk) {
- retval = io_channel_read_blk(fs->io, block_nr, 1,
- fs->icache->buffer);
- if (retval)
- return retval;
- fs->icache->buffer_blk = block_nr;
- }
- offset &= (EXT2_BLOCK_SIZE(fs->super) - 1);
- ptr = ((char *) fs->icache->buffer) + (unsigned) offset;
-
- memset(inode, 0, sizeof(struct ext2_inode));
- length = EXT2_INODE_SIZE(fs->super);
- if (length > sizeof(struct ext2_inode))
- length = sizeof(struct ext2_inode);
-
- if ((offset + length) > EXT2_BLOCK_SIZE(fs->super)) {
- clen = (int) (EXT2_BLOCK_SIZE(fs->super) - offset);
- memcpy((char *) inode, ptr, clen);
- length -= clen;
-
- retval = io_channel_read_blk(fs->io, block_nr+1, 1,
- fs->icache->buffer);
- if (retval) {
- fs->icache->buffer_blk = 0;
- return retval;
- }
- fs->icache->buffer_blk = block_nr+1;
-
- memcpy(((char *) inode) + clen,
- fs->icache->buffer, length);
- } else
- memcpy((char *) inode, ptr, length);
-
-#ifdef EXT2FS_ENABLE_SWAPFS
- if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
- (fs->flags & EXT2_FLAG_SWAP_BYTES_READ))
- ext2fs_swap_inode(fs, inode, inode, 0);
-#endif
-
- /* Update the inode cache */
- fs->icache->cache_last = (fs->icache->cache_last + 1) %
- fs->icache->cache_size;
- fs->icache->cache[fs->icache->cache_last].ino = ino;
- fs->icache->cache[fs->icache->cache_last].inode = *inode;
-
- return 0;
-}
-
-errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino,
- struct ext2_inode * inode)
-{
- unsigned long group, block, block_nr, offset;
- errcode_t retval;
- struct ext2_inode temp_inode;
- char *ptr;
- int clen, length, i;
-
- EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
-
- /* Check to see if user provided an override function */
- if (fs->write_inode) {
- retval = (fs->write_inode)(fs, ino, inode);
- if (retval != EXT2_ET_CALLBACK_NOTHANDLED)
- return retval;
- }
-
- /* Check to see if the inode cache needs to be updated */
- if (fs->icache) {
- for (i=0; i < fs->icache->cache_size; i++) {
- if (fs->icache->cache[i].ino == ino) {
- fs->icache->cache[i].inode = *inode;
- break;
- }
- }
- } else {
- retval = create_icache(fs);
- if (retval)
- return retval;
- }
-
- if (!(fs->flags & EXT2_FLAG_RW))
- return EXT2_ET_RO_FILSYS;
-
- if ((ino == 0) || (ino > fs->super->s_inodes_count))
- return EXT2_ET_BAD_INODE_NUM;
-
-#ifdef EXT2FS_ENABLE_SWAPFS
- if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
- (fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE))
- ext2fs_swap_inode(fs, &temp_inode, inode, 1);
- else
-#endif
- memcpy(&temp_inode, inode, sizeof(struct ext2_inode));
-
- group = (ino - 1) / EXT2_INODES_PER_GROUP(fs->super);
- offset = ((ino - 1) % EXT2_INODES_PER_GROUP(fs->super)) *
- EXT2_INODE_SIZE(fs->super);
- block = offset >> EXT2_BLOCK_SIZE_BITS(fs->super);
- if (!fs->group_desc[(unsigned) group].bg_inode_table)
- return EXT2_ET_MISSING_INODE_TABLE;
- block_nr = fs->group_desc[(unsigned) group].bg_inode_table + block;
- offset &= (EXT2_BLOCK_SIZE(fs->super) - 1);
- ptr = (char *) fs->icache->buffer + (unsigned) offset;
-
- length = EXT2_INODE_SIZE(fs->super);
- clen = length;
- if (length > sizeof(struct ext2_inode))
- length = sizeof(struct ext2_inode);
-
- if (fs->icache->buffer_blk != block_nr) {
- retval = io_channel_read_blk(fs->io, block_nr, 1,
- fs->icache->buffer);
- if (retval)
- return retval;
- fs->icache->buffer_blk = block_nr;
- }
-
- if ((offset + length) > EXT2_BLOCK_SIZE(fs->super)) {
- clen = (int) (EXT2_BLOCK_SIZE(fs->super) - offset);
- length -= clen;
- } else {
- length = 0;
- }
- memcpy(ptr, &temp_inode, clen);
- retval = io_channel_write_blk(fs->io, block_nr, 1, fs->icache->buffer);
- if (retval)
- return retval;
-
- if (length) {
- retval = io_channel_read_blk(fs->io, ++block_nr, 1,
- fs->icache->buffer);
- if (retval) {
- fs->icache->buffer_blk = 0;
- return retval;
- }
- fs->icache->buffer_blk = block_nr;
- memcpy(fs->icache->buffer, ((char *) &temp_inode) + clen,
- length);
-
- retval = io_channel_write_blk(fs->io, block_nr, 1,
- fs->icache->buffer);
- if (retval)
- return retval;
- }
-
- fs->flags |= EXT2_FLAG_CHANGED;
- return 0;
-}
-
-errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks)
-{
- struct ext2_inode inode;
- int i;
- errcode_t retval;
-
- EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
-
- if (ino > fs->super->s_inodes_count)
- return EXT2_ET_BAD_INODE_NUM;
-
- if (fs->get_blocks) {
- if (!(*fs->get_blocks)(fs, ino, blocks))
- return 0;
- }
- retval = ext2fs_read_inode(fs, ino, &inode);
- if (retval)
- return retval;
- for (i=0; i < EXT2_N_BLOCKS; i++)
- blocks[i] = inode.i_block[i];
- return 0;
-}
-
-errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino)
-{
- struct ext2_inode inode;
- errcode_t retval;
-
- EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
-
- if (ino > fs->super->s_inodes_count)
- return EXT2_ET_BAD_INODE_NUM;
-
- if (fs->check_directory) {
- retval = (fs->check_directory)(fs, ino);
- if (retval != EXT2_ET_CALLBACK_NOTHANDLED)
- return retval;
- }
- retval = ext2fs_read_inode(fs, ino, &inode);
- if (retval)
- return retval;
- if (!LINUX_S_ISDIR(inode.i_mode))
- return EXT2_ET_NO_DIRECTORY;
- return 0;
-}
-