/*
* 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.
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
* %End-Header%
*/
+#include "config.h"
#include <stdio.h>
#include <string.h>
#if HAVE_UNISTD_H
#if HAVE_ERRNO_H
#include <errno.h>
#endif
+#include <time.h>
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
errcode_t magic;
ext2_filsys fs;
ext2_ino_t current_inode;
- blk_t current_block;
+ blk64_t current_block;
dgrp_t current_group;
ext2_ino_t inodes_left;
blk_t blocks_left;
errcode_t ext2fs_flush_icache(ext2_filsys fs)
{
int i;
-
+
if (!fs->icache)
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), &fs->icache);
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,
- &fs->icache->cache);
+ 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);
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->current_block = ext2fs_inode_table_loc(scan->fs,
+ scan->current_group);
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),
- &scan->inode_buffer);
+ if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
+ __u32 unused = ext2fs_bg_itable_unused(fs, scan->current_group);
+ if (scan->inodes_left > unused)
+ scan->inodes_left -= unused;
+ else
+ scan->inodes_left = 0;
+ scan->blocks_left =
+ (scan->inodes_left +
+ (fs->blocksize / scan->inode_size - 1)) *
+ scan->inode_size / fs->blocksize;
+ }
+ retval = io_channel_alloc_buf(fs->io, scan->inode_buffer_blocks,
+ &scan->inode_buffer);
scan->done_group = 0;
scan->done_group_data = 0;
scan->bad_block_ptr = 0;
}
if (scan->fs->badblocks && scan->fs->badblocks->num)
scan->scan_flags |= EXT2_SF_CHK_BADBLOCKS;
- if (EXT2_HAS_COMPAT_FEATURE(fs->super,
- EXT2_FEATURE_COMPAT_LAZY_BG))
+ if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
scan->scan_flags |= EXT2_SF_DO_LAZY;
*ret_scan = scan;
return 0;
{
if (!scan || (scan->magic != EXT2_ET_MAGIC_INODE_SCAN))
return;
-
+
ext2fs_free_mem(&scan->inode_buffer);
scan->inode_buffer = NULL;
ext2fs_free_mem(&scan->temp_buffer);
{
if (!scan || (scan->magic != EXT2_ET_MAGIC_INODE_SCAN))
return;
-
+
scan->done_group = done_group;
scan->done_group_data = done_group_data;
}
*/
static errcode_t get_next_blockgroup(ext2_inode_scan scan)
{
+ ext2_filsys fs = scan->fs;
+
scan->current_group++;
scan->groups_left--;
-
- scan->current_block = scan->fs->
- group_desc[scan->current_group].bg_inode_table;
+ scan->current_block = ext2fs_inode_table_loc(scan->fs,
+ scan->current_group);
scan->current_inode = scan->current_group *
- EXT2_INODES_PER_GROUP(scan->fs->super);
+ EXT2_INODES_PER_GROUP(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;
+ scan->inodes_left = EXT2_INODES_PER_GROUP(fs->super);
+ scan->blocks_left = fs->inode_blocks_per_group;
+ if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
+ __u32 unused = ext2fs_bg_itable_unused(fs, scan->current_group);
+ if (scan->inodes_left > unused)
+ scan->inodes_left -= unused;
+ else
+ scan->inodes_left = 0;
+ scan->blocks_left =
+ (scan->inodes_left +
+ (fs->blocksize / scan->inode_size - 1)) *
+ scan->inode_size / fs->blocksize;
+ }
+
return 0;
}
* increasing order.
*/
static errcode_t check_for_inode_bad_blocks(ext2_inode_scan scan,
- blk_t *num_blocks)
+ blk64_t *num_blocks)
{
- blk_t blk = scan->current_block;
+ blk64_t blk = scan->current_block;
badblocks_list bb = scan->fs->badblocks;
/*
*/
static errcode_t get_next_blocks(ext2_inode_scan scan)
{
- blk_t num_blocks;
+ blk64_t num_blocks;
errcode_t retval;
/*
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,
+ retval = io_channel_read_blk64(scan->fs->io,
scan->current_block,
(int) num_blocks,
scan->inode_buffer);
static inline int is_empty_scan(ext2_inode_scan scan)
{
int i;
-
+
if (scan->bytes_left == 0)
return 0;
{
errcode_t retval;
int extra_bytes = 0;
-
+
EXT2_CHECK_MAGIC(scan, EXT2_ET_MAGIC_INODE_SCAN);
/*
return retval;
}
/*
- * These checks are done outside the above if statement so
+ * These checks are done outside the above if statement so
* they can be done for block group #0.
*/
if ((scan->scan_flags & EXT2_SF_DO_LAZY) &&
- (scan->fs->group_desc[scan->current_group].bg_flags &
- EXT2_BG_INODE_UNINIT))
+ (ext2fs_bg_flags_test(scan->fs, scan->current_group, EXT2_BG_INODE_UNINIT)
+ ))
+ goto force_new_group;
+ if (scan->inodes_left == 0)
goto force_new_group;
if (scan->current_block == 0) {
if (scan->scan_flags & EXT2_SF_SKIP_MISSING_ITABLE) {
} else
return EXT2_ET_MISSING_INODE_TABLE;
}
-
+
/*
* Have we run out of space in the inode buffer? If so, we
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_full(scan->fs,
- (struct ext2_inode_large *) inode,
- (struct ext2_inode_large *) scan->temp_buffer,
- 0, bufsize);
- else
+#ifdef WORDS_BIGENDIAN
+ memset(inode, 0, bufsize);
+ ext2fs_swap_inode_full(scan->fs,
+ (struct ext2_inode_large *) inode,
+ (struct ext2_inode_large *) scan->temp_buffer,
+ 0, bufsize);
+#else
+ memcpy(inode, scan->temp_buffer, bufsize);
#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_full(scan->fs,
+#ifdef WORDS_BIGENDIAN
+ memset(inode, 0, bufsize);
+ ext2fs_swap_inode_full(scan->fs,
(struct ext2_inode_large *) inode,
(struct ext2_inode_large *) scan->ptr,
0, bufsize);
- else
+#else
+ memcpy(inode, scan->ptr, bufsize);
#endif
- memcpy(inode, scan->ptr, bufsize);
scan->ptr += scan->inode_size;
scan->bytes_left -= scan->inode_size;
if (scan->scan_flags & EXT2_SF_BAD_INODE_BLK)
errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino,
struct ext2_inode * inode, int bufsize)
{
- unsigned long group, block, block_nr, offset;
+ blk64_t block_nr;
+ unsigned long group, block, offset;
char *ptr;
errcode_t retval;
int clen, i, inodes_per_block, length;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
/* Check to see if user has an override function */
- if (fs->read_inode) {
+ if (fs->read_inode &&
+ ((bufsize == sizeof(struct ext2_inode)) ||
+ (EXT2_INODE_SIZE(fs->super) == sizeof(struct ext2_inode)))) {
retval = (fs->read_inode)(fs, ino, inode);
if (retval != EXT2_ET_CALLBACK_NOTHANDLED)
return retval;
}
+ if ((ino == 0) || (ino > fs->super->s_inodes_count))
+ return EXT2_ET_BAD_INODE_NUM;
/* Create inode cache if not present */
if (!fs->icache) {
retval = create_icache(fs);
}
/* Check to see if it's in the inode cache */
if (bufsize == sizeof(struct ext2_inode)) {
- /* only old good inode can be retrieve from the cache */
+ /* only old good inode can be retrieved from the cache */
for (i=0; i < fs->icache->cache_size; i++) {
if (fs->icache->cache[i].ino == ino) {
*inode = fs->icache->cache[i].inode;
}
}
}
- 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;
io = fs->image_io;
} else {
group = (ino - 1) / EXT2_INODES_PER_GROUP(fs->super);
+ if (group > fs->group_desc_count)
+ return EXT2_ET_BAD_INODE_NUM;
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)
+ if (!ext2fs_inode_table_loc(fs, (unsigned) group))
return EXT2_ET_MISSING_INODE_TABLE;
- block_nr = fs->group_desc[(unsigned)group].bg_inode_table +
+ block_nr = ext2fs_inode_table_loc(fs, group) +
block;
io = fs->io;
}
clen = fs->blocksize - offset;
if (block_nr != fs->icache->buffer_blk) {
- retval = io_channel_read_blk(io, block_nr, 1,
+ retval = io_channel_read_blk64(io, block_nr, 1,
fs->icache->buffer);
if (retval)
return retval;
block_nr++;
}
-#ifdef EXT2FS_ENABLE_SWAPFS
- if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
- (fs->flags & EXT2_FLAG_SWAP_BYTES_READ))
- ext2fs_swap_inode_full(fs, (struct ext2_inode_large *) inode,
- (struct ext2_inode_large *) inode,
- 0, length);
+#ifdef WORDS_BIGENDIAN
+ ext2fs_swap_inode_full(fs, (struct ext2_inode_large *) inode,
+ (struct ext2_inode_large *) inode,
+ 0, bufsize);
#endif
/* Update the inode cache */
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_full(ext2_filsys fs, ext2_ino_t ino,
struct ext2_inode * inode, int bufsize)
{
- unsigned long group, block, block_nr, offset;
+ blk64_t block_nr;
+ unsigned long group, block, offset;
errcode_t retval = 0;
struct ext2_inode_large temp_inode, *w_inode;
char *ptr;
if (retval)
return retval;
}
-
+
if (!(fs->flags & EXT2_FLAG_RW))
return EXT2_ET_RO_FILSYS;
if (length > (int) sizeof(struct ext2_inode_large)) {
w_inode = malloc(length);
- if (!w_inode)
- return ENOMEM;
+ if (!w_inode) {
+ retval = ENOMEM;
+ goto errout;
+ }
} else
w_inode = &temp_inode;
memset(w_inode, 0, length);
-#ifdef EXT2FS_ENABLE_SWAPFS
- if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
- (fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE))
- ext2fs_swap_inode_full(fs, w_inode,
- (struct ext2_inode_large *) inode,
- 1, bufsize);
- else
+#ifdef WORDS_BIGENDIAN
+ ext2fs_swap_inode_full(fs, w_inode,
+ (struct ext2_inode_large *) inode,
+ 1, bufsize);
+#else
+ memcpy(w_inode, inode, bufsize);
#endif
- memcpy(w_inode, inode, bufsize);
-
+
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 (!ext2fs_inode_table_loc(fs, (unsigned) group)) {
+ retval = EXT2_ET_MISSING_INODE_TABLE;
+ goto errout;
+ }
+ block_nr = ext2fs_inode_table_loc(fs, (unsigned) group) + block;
offset &= (EXT2_BLOCK_SIZE(fs->super) - 1);
clen = fs->blocksize - offset;
if (fs->icache->buffer_blk != block_nr) {
- retval = io_channel_read_blk(fs->io, block_nr, 1,
+ retval = io_channel_read_blk64(fs->io, block_nr, 1,
fs->icache->buffer);
if (retval)
goto errout;
fs->icache->buffer_blk = block_nr;
}
-
- memcpy((char *) fs->icache->buffer + (unsigned) offset,
+
+ memcpy((char *) fs->icache->buffer + (unsigned) offset,
ptr, clen);
- retval = io_channel_write_blk(fs->io, block_nr, 1,
+ retval = io_channel_write_blk64(fs->io, block_nr, 1,
fs->icache->buffer);
if (retval)
goto errout;
length -= clen;
block_nr++;
}
-
+
fs->flags |= EXT2_FLAG_CHANGED;
errout:
if (w_inode && w_inode != &temp_inode)
sizeof(struct ext2_inode));
}
-/*
+/*
* This function should be called when writing a new inode. It makes
* sure that extra part of large inodes is initialized properly.
*/
struct ext2_inode *buf;
int size = EXT2_INODE_SIZE(fs->super);
struct ext2_inode_large *large_inode;
+ errcode_t retval;
+ __u32 t = fs->now ? fs->now : time(NULL);
+
+ if (!inode->i_ctime)
+ inode->i_ctime = t;
+ if (!inode->i_mtime)
+ inode->i_mtime = t;
+ if (!inode->i_atime)
+ inode->i_atime = t;
if (size == sizeof(struct ext2_inode))
return ext2fs_write_inode_full(fs, ino, inode,
*buf = *inode;
large_inode = (struct ext2_inode_large *) buf;
- large_inode->i_extra_isize = sizeof(struct ext2_inode_large) -
+ large_inode->i_extra_isize = sizeof(struct ext2_inode_large) -
EXT2_GOOD_OLD_INODE_SIZE;
+ if (!large_inode->i_crtime)
+ large_inode->i_crtime = t;
- return ext2fs_write_inode_full(fs, ino, buf, size);
+ retval = ext2fs_write_inode_full(fs, ino, buf, size);
+ free(buf);
+ return retval;
}
-
+
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)
{
struct ext2_inode inode;
errcode_t retval;
-
+
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
if (ino > fs->super->s_inodes_count)
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff