* Copyright (C) 2007 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
ext2_filsys fs;
ext2_ino_t ino;
struct ext2_inode *inode;
+ struct ext2_inode inodebuf;
int type;
int level;
int max_depth;
static void dbg_show_header(struct ext3_extent_header *eh)
{
printf("header: magic=%x entries=%u max=%u depth=%u generation=%u\n",
- eh->eh_magic, eh->eh_entries, eh->eh_max, eh->eh_depth,
- eh->eh_generation);
+ ext2fs_le16_to_cpu(eh->eh_magic),
+ ext2fs_le16_to_cpu(eh->eh_entries),
+ ext2fs_le16_to_cpu(eh->eh_max),
+ ext2fs_le16_to_cpu(eh->eh_depth),
+ ext2fs_le32_to_cpu(eh->eh_generation));
}
static void dbg_show_index(struct ext3_extent_idx *ix)
{
printf("index: block=%u leaf=%u leaf_hi=%u unused=%u\n",
- ix->ei_block, ix->ei_leaf, ix->ei_leaf_hi, ix->ei_unused);
+ ext2fs_le32_to_cpu(ix->ei_block),
+ ext2fs_le32_to_cpu(ix->ei_leaf),
+ ext2fs_le16_to_cpu(ix->ei_leaf_hi),
+ ext2fs_le16_to_cpu(ix->ei_unused));
}
static void dbg_show_extent(struct ext3_extent *ex)
{
printf("extent: block=%u-%u len=%u start=%u start_hi=%u\n",
- ex->ee_block, ex->ee_block + ex->ee_len - 1,
- ex->ee_len, ex->ee_start, ex->ee_start_hi);
+ ext2fs_le32_to_cpu(ex->ee_block),
+ ext2fs_le32_to_cpu(ex->ee_block) +
+ ext2fs_le16_to_cpu(ex->ee_len) - 1,
+ ext2fs_le16_to_cpu(ex->ee_len),
+ ext2fs_le32_to_cpu(ex->ee_start),
+ ext2fs_le16_to_cpu(ex->ee_start_hi));
}
static void dbg_print_extent(char *desc, struct ext2fs_extent *extent)
{
if (desc)
printf("%s: ", desc);
- printf("extent: lblk %llu--%llu, len %lu, pblk %llu, flags: ",
+ printf("extent: lblk %llu--%llu, len %u, pblk %llu, flags: ",
extent->e_lblk, extent->e_lblk + extent->e_len - 1,
extent->e_len, extent->e_pblk);
if (extent->e_flags & EXT2_EXTENT_FLAGS_LEAF)
eh_max = (size - sizeof(*eh)) / entry_size;
/* Allow two extent-sized items at the end of the block, for
* ext4_extent_tail with checksum in the future. */
- if ((ext2fs_le16_to_cpu(eh->eh_max) > eh_max) ||
+ if ((ext2fs_le16_to_cpu(eh->eh_max) > eh_max) ||
(ext2fs_le16_to_cpu(eh->eh_max) < (eh_max - 2)))
return EXT2_ET_EXTENT_HEADER_BAD;
if (!handle)
return;
- if (handle->inode)
- ext2fs_free_mem(&handle->inode);
if (handle->path) {
- for (i=1; i < handle->max_depth; i++) {
+ for (i=1; i <= handle->max_depth; i++) {
if (handle->path[i].buf)
ext2fs_free_mem(&handle->path[i].buf);
}
extern errcode_t ext2fs_extent_open(ext2_filsys fs, ext2_ino_t ino,
ext2_extent_handle_t *ret_handle)
{
+ return ext2fs_extent_open2(fs, ino, NULL, ret_handle);
+}
+
+extern errcode_t ext2fs_extent_open2(ext2_filsys fs, ext2_ino_t ino,
+ struct ext2_inode *inode,
+ ext2_extent_handle_t *ret_handle)
+{
struct ext2_extent_handle *handle;
errcode_t retval;
- int isize = EXT2_INODE_SIZE(fs->super);
int i;
struct ext3_extent_header *eh;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
- if ((ino == 0) || (ino > fs->super->s_inodes_count))
- return EXT2_ET_BAD_INODE_NUM;
+ if (!inode)
+ if ((ino == 0) || (ino > fs->super->s_inodes_count))
+ return EXT2_ET_BAD_INODE_NUM;
retval = ext2fs_get_mem(sizeof(struct ext2_extent_handle), &handle);
if (retval)
return retval;
memset(handle, 0, sizeof(struct ext2_extent_handle));
- retval = ext2fs_get_mem(isize, &handle->inode);
- if (retval)
- goto errout;
-
handle->ino = ino;
handle->fs = fs;
- retval = ext2fs_read_inode_full(fs, ino, handle->inode, isize);
- if (retval)
- goto errout;
+ if (inode) {
+ handle->inode = inode;
+ } else {
+ handle->inode = &handle->inodebuf;
+ retval = ext2fs_read_inode(fs, ino, handle->inode);
+ if (retval)
+ goto errout;
+ }
eh = (struct ext3_extent_header *) &handle->inode->i_block[0];
handle->inode->i_flags |= EXT4_EXTENTS_FL;
}
- if (!(handle->inode->i_flags & EXT4_EXTENTS_FL))
- return EXT2_ET_INODE_NOT_EXTENT;
+ if (!(handle->inode->i_flags & EXT4_EXTENTS_FL)) {
+ retval = EXT2_ET_INODE_NOT_EXTENT;
+ goto errout;
+ }
retval = ext2fs_extent_header_verify(eh, sizeof(handle->inode->i_block));
if (retval)
- return (retval);
+ goto errout;
handle->max_depth = ext2fs_le16_to_cpu(eh->eh_depth);
handle->type = ext2fs_le16_to_cpu(eh->eh_magic);
handle->path[0].max_entries = ext2fs_le16_to_cpu(eh->eh_max);
handle->path[0].curr = 0;
handle->path[0].end_blk =
- ((((__u64) handle->inode->i_size_high << 32) +
- handle->inode->i_size + (fs->blocksize - 1))
- >> EXT2_BLOCK_SIZE_BITS(fs->super));
+ (EXT2_I_SIZE(handle->inode) + fs->blocksize - 1) >>
+ EXT2_BLOCK_SIZE_BITS(fs->super);
handle->path[0].visit_num = 1;
handle->level = 0;
handle->magic = EXT2_ET_MAGIC_EXTENT_HANDLE;
struct ext3_extent_idx *ix = 0;
struct ext3_extent *ex;
errcode_t retval;
- blk_t blk;
+ blk64_t blk;
blk64_t end_blk;
int orig_op, op;
return EXT2_ET_EXTENT_NO_NEXT;
}
if (op != EXT2_EXTENT_NEXT_SIB) {
-#ifdef DEBUG
+#ifdef DEBUG_GET_EXTENT
printf("<<<< OP = %s\n",
(op == EXT2_EXTENT_DOWN) ? "down" :
((op == EXT2_EXTENT_UP) ? "up" : "unknown"));
return EXT2_ET_EXTENT_NO_PREV;
}
if (op != EXT2_EXTENT_PREV_SIB) {
-#ifdef DEBUG
+#ifdef DEBUG_GET_EXTENT
printf("<<<< OP = %s\n",
(op == EXT2_EXTENT_DOWN_AND_LAST) ? "down/last" :
((op == EXT2_EXTENT_UP) ? "up" : "unknown"));
op = EXT2_EXTENT_DOWN;
else
op = EXT2_EXTENT_LAST_SIB;
-#ifdef DEBUG
+#ifdef DEBUG_GET_EXTENT
printf("<<<< OP = %s\n",
(op == EXT2_EXTENT_DOWN) ? "down" : "last_sib");
#endif
case EXT2_EXTENT_ROOT:
handle->level = 0;
path = handle->path + handle->level;
+ /* fallthrough */
case EXT2_EXTENT_FIRST_SIB:
path->left = path->entries;
path->curr = 0;
+ /* fallthrough */
case EXT2_EXTENT_NEXT_SIB:
if (path->left <= 0)
return EXT2_ET_EXTENT_NO_NEXT;
(handle->fs->io != handle->fs->image_io))
memset(newpath->buf, 0, handle->fs->blocksize);
else {
- retval = io_channel_read_blk(handle->fs->io,
+ retval = io_channel_read_blk64(handle->fs->io,
blk, 1, newpath->buf);
if (retval)
return retval;
eh = (struct ext3_extent_header *) newpath->buf;
retval = ext2fs_extent_header_verify(eh, handle->fs->blocksize);
- if (retval)
+ if (retval) {
+ handle->level--;
return retval;
+ }
newpath->left = newpath->entries =
ext2fs_le16_to_cpu(eh->eh_entries);
if (handle->level < handle->max_depth)
path->visit_num = 1;
}
-#ifdef DEBUG
+#ifdef DEBUG_GET_EXTENT
printf("Down to level %d/%d, end_blk=%llu\n",
handle->level, handle->max_depth,
path->end_blk);
return EXT2_ET_NO_CURRENT_NODE;
extent->e_flags = 0;
-#ifdef DEBUG
+#ifdef DEBUG_GET_EXTENT
printf("(Left %d)\n", path->left);
#endif
struct ext3_extent_idx *ix;
if (handle->level == 0) {
- retval = ext2fs_write_inode_full(handle->fs, handle->ino,
- handle->inode, EXT2_INODE_SIZE(handle->fs->super));
+ retval = ext2fs_write_inode(handle->fs, handle->ino,
+ handle->inode);
} else {
ix = handle->path[handle->level - 1].curr;
blk = ext2fs_le32_to_cpu(ix->ei_leaf) +
((__u64) ext2fs_le16_to_cpu(ix->ei_leaf_hi) << 32);
- retval = io_channel_write_blk(handle->fs->io,
+ retval = io_channel_write_blk64(handle->fs->io,
blk, 1, handle->path[handle->level].buf);
}
return retval;
errcode_t retval;
retval = ext2fs_extent_get(handle, EXT2_EXTENT_ROOT, &extent);
- if (retval)
+ if (retval) {
+ if (retval == EXT2_ET_EXTENT_NO_NEXT)
+ retval = EXT2_ET_EXTENT_NOT_FOUND;
return retval;
+ }
if (leaf_level > handle->max_depth) {
#ifdef DEBUG
return EXT2_ET_OP_NOT_SUPPORTED;
}
+#ifdef DEBUG
+ printf("goto extent ino %u, level %d, %llu\n", handle->ino,
+ leaf_level, blk);
+#endif
+
+#ifdef DEBUG_GOTO_EXTENTS
dbg_print_extent("root", &extent);
+#endif
while (1) {
if (handle->max_depth - handle->level == leaf_level) {
/* block is in this &extent */
if (retval)
return retval;
+#ifdef DEBUG_GOTO_EXTENTS
dbg_print_extent("next", &extent);
+#endif
if (blk == extent.e_lblk)
goto go_down;
if (blk > extent.e_lblk)
if (retval)
return retval;
+#ifdef DEBUG_GOTO_EXTENTS
dbg_print_extent("prev", &extent);
+#endif
go_down:
retval = ext2fs_extent_get(handle, EXT2_EXTENT_DOWN,
if (retval)
return retval;
+#ifdef DEBUG_GOTO_EXTENTS
dbg_print_extent("down", &extent);
+#endif
}
}
return retval;
}
-errcode_t ext2fs_extent_replace(ext2_extent_handle_t handle,
+errcode_t ext2fs_extent_replace(ext2_extent_handle_t handle,
int flags EXT2FS_ATTR((unused)),
struct ext2fs_extent *extent)
{
if (!path->curr)
return EXT2_ET_NO_CURRENT_NODE;
+#ifdef DEBUG
+ printf("extent replace: %u ", handle->ino);
+ dbg_print_extent(0, extent);
+#endif
+
if (handle->level == handle->max_depth) {
ex = path->curr;
static errcode_t extent_node_split(ext2_extent_handle_t handle)
{
errcode_t retval = 0;
- blk_t new_node_pblk;
+ blk64_t new_node_pblk;
blk64_t new_node_start;
blk64_t orig_lblk;
blk64_t goal_blk = 0;
goal_blk = (group * handle->fs->super->s_blocks_per_group) +
handle->fs->super->s_first_data_block;
}
- retval = ext2fs_alloc_block(handle->fs, (blk_t) goal_blk, block_buf,
+ retval = ext2fs_alloc_block2(handle->fs, goal_blk, block_buf,
&new_node_pblk);
if (retval)
goto done;
#ifdef DEBUG
- printf("will copy to new node at block %lu\n", new_node_pblk);
+ printf("will copy to new node at block %lu\n",
+ (unsigned long) new_node_pblk);
#endif
/* Copy data into new block buffer */
new_node_start = ext2fs_le32_to_cpu(EXT_FIRST_INDEX(neweh)->ei_block);
/* ...and write the new node block out to disk. */
- retval = io_channel_write_blk(handle->fs->io, new_node_pblk, 1, block_buf);
+ retval = io_channel_write_blk64(handle->fs->io, new_node_pblk, 1,
+ block_buf);
if (retval)
goto done;
goto done;
/* new node hooked in, so update inode block count (do this here?) */
- handle->inode->i_blocks += handle->fs->blocksize / 512;
- retval = ext2fs_write_inode_full(handle->fs, handle->ino,
- handle->inode, EXT2_INODE_SIZE(handle->fs->super));
+ handle->inode->i_blocks += (handle->fs->blocksize *
+ EXT2FS_CLUSTER_RATIO(handle->fs)) / 512;
+ retval = ext2fs_write_inode(handle->fs, handle->ino,
+ handle->inode);
if (retval)
goto done;
done:
if (newpath)
ext2fs_free_mem(&newpath);
- if (block_buf)
- free(block_buf);
+ free(block_buf);
return retval;
}
if (!handle->path)
return EXT2_ET_NO_CURRENT_NODE;
+#ifdef DEBUG
+ printf("extent insert: %u ", handle->ino);
+ dbg_print_extent(0, extent);
+#endif
+
path = handle->path + handle->level;
if (path->entries >= path->max_entries) {
#endif
retval = extent_node_split(handle);
if (retval)
- goto errout;
+ return retval;
path = handle->path + handle->level;
}
}
int mapped = 1; /* logical is mapped? */
int orig_height;
int extent_uninit = 0;
+ int prev_uninit = 0;
+ int next_uninit = 0;
int new_uninit = 0;
int max_len = EXT_INIT_MAX_LEN;
+ int has_prev, has_next;
blk64_t orig_lblk;
struct extent_path *path;
- struct ext2fs_extent extent;
+ struct ext2fs_extent extent, next_extent, prev_extent;
struct ext2fs_extent newextent;
struct ext2_extent_info info;
EXT2_CHECK_MAGIC(handle, EXT2_ET_MAGIC_EXTENT_HANDLE);
+#ifdef DEBUG
+ printf("set_bmap ino %u log %lld phys %lld flags %d\n",
+ handle->ino, logical, physical, flags);
+#endif
+
if (!(handle->fs->flags & EXT2_FLAG_RW))
return EXT2_ET_RO_FILSYS;
/*
* This may be the extent *before* the requested logical,
* if it's currently unmapped.
+ *
+ * Get the previous and next leaf extents, if they are present.
*/
retval = ext2fs_extent_get(handle, EXT2_EXTENT_CURRENT, &extent);
if (retval)
goto done;
if (extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT)
extent_uninit = 1;
+ retval = ext2fs_extent_get(handle, EXT2_EXTENT_NEXT_LEAF, &next_extent);
+ if (retval) {
+ has_next = 0;
+ if (retval != EXT2_ET_EXTENT_NO_NEXT)
+ goto done;
+ } else {
+ dbg_print_extent("set_bmap: next_extent",
+ &next_extent);
+ has_next = 1;
+ if (next_extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT)
+ next_uninit = 1;
+ }
+ retval = ext2fs_extent_goto(handle, logical);
+ if (retval && retval != EXT2_ET_EXTENT_NOT_FOUND)
+ goto done;
+ retval = ext2fs_extent_get(handle, EXT2_EXTENT_PREV_LEAF, &prev_extent);
+ if (retval) {
+ has_prev = 0;
+ if (retval != EXT2_ET_EXTENT_NO_PREV)
+ goto done;
+ } else {
+ has_prev = 1;
+ dbg_print_extent("set_bmap: prev_extent",
+ &prev_extent);
+ if (prev_extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT)
+ prev_uninit = 1;
+ }
+ retval = ext2fs_extent_goto(handle, logical);
+ if (retval && retval != EXT2_ET_EXTENT_NOT_FOUND)
+ goto done;
/* check if already pointing to the requested physical */
if (mapped && (new_uninit == extent_uninit) &&
((int) extent.e_len < max_len-1)) {
extent.e_len++;
retval = ext2fs_extent_replace(handle, 0, &extent);
- } else
+ } else if ((logical == extent.e_lblk - 1) &&
+ (physical == extent.e_pblk - 1) &&
+ (new_uninit == extent_uninit) &&
+ ((int) extent.e_len < max_len - 1)) {
+ extent.e_len++;
+ extent.e_lblk--;
+ extent.e_pblk--;
+ retval = ext2fs_extent_replace(handle, 0, &extent);
+ } else if (has_next &&
+ (logical == next_extent.e_lblk - 1) &&
+ (physical == next_extent.e_pblk - 1) &&
+ (new_uninit == next_uninit) &&
+ ((int) next_extent.e_len < max_len - 1)) {
+ retval = ext2fs_extent_get(handle,
+ EXT2_EXTENT_NEXT_LEAF,
+ &next_extent);
+ if (retval)
+ goto done;
+ next_extent.e_len++;
+ next_extent.e_lblk--;
+ next_extent.e_pblk--;
+ retval = ext2fs_extent_replace(handle, 0, &next_extent);
+ } else if (logical < extent.e_lblk)
+ retval = ext2fs_extent_insert(handle, 0, &newextent);
+ else
retval = ext2fs_extent_insert(handle,
EXT2_EXTENT_INSERT_AFTER, &newextent);
if (retval)
printf("(re/un)mapping only block in extent\n");
#endif
if (physical) {
- extent.e_pblk = physical;
- retval = ext2fs_extent_replace(handle, 0, &extent);
+ retval = ext2fs_extent_replace(handle, 0, &newextent);
} else {
retval = ext2fs_extent_delete(handle, 0);
if (retval)
#ifdef DEBUG
printf("(re/un)mapping last block in extent\n");
#endif
- extent.e_len--;
- retval = ext2fs_extent_replace(handle, 0, &extent);
- if (retval)
- goto done;
if (physical) {
- retval = ext2fs_extent_insert(handle,
- EXT2_EXTENT_INSERT_AFTER, &newextent);
+ if (has_next &&
+ (logical == (next_extent.e_lblk - 1)) &&
+ (physical == (next_extent.e_pblk - 1)) &&
+ (new_uninit == next_uninit) &&
+ ((int) next_extent.e_len < max_len - 1)) {
+ retval = ext2fs_extent_get(handle,
+ EXT2_EXTENT_NEXT_LEAF, &next_extent);
+ if (retval)
+ goto done;
+ next_extent.e_len++;
+ next_extent.e_lblk--;
+ next_extent.e_pblk--;
+ retval = ext2fs_extent_replace(handle, 0,
+ &next_extent);
+ if (retval)
+ goto done;
+ } else
+ retval = ext2fs_extent_insert(handle,
+ EXT2_EXTENT_INSERT_AFTER, &newextent);
+ if (retval)
+ goto done;
+ /* Now pointing at inserted extent; move back to prev */
+ retval = ext2fs_extent_get(handle,
+ EXT2_EXTENT_PREV_LEAF,
+ &extent);
if (retval)
goto done;
}
- } else if (logical == extent.e_lblk) {
-#ifdef DEBUG
- printf("(re/un)mapping first block in extent\n");
-#endif
- extent.e_pblk++;
- extent.e_lblk++;
extent.e_len--;
retval = ext2fs_extent_replace(handle, 0, &extent);
if (retval)
goto done;
+ } else if (logical == extent.e_lblk) {
+#ifdef DEBUG
+ printf("(re/un)mapping first block in extent\n");
+#endif
if (physical) {
- /* insert new extent ahead of current */
- retval = ext2fs_extent_insert(handle,
- 0, &newextent);
+ if (has_prev &&
+ (logical == (prev_extent.e_lblk +
+ prev_extent.e_len)) &&
+ (physical == (prev_extent.e_pblk +
+ prev_extent.e_len)) &&
+ (new_uninit == prev_uninit) &&
+ ((int) prev_extent.e_len < max_len-1)) {
+ retval = ext2fs_extent_get(handle,
+ EXT2_EXTENT_PREV_LEAF, &prev_extent);
+ if (retval)
+ goto done;
+ prev_extent.e_len++;
+ retval = ext2fs_extent_replace(handle, 0,
+ &prev_extent);
+ } else
+ retval = ext2fs_extent_insert(handle,
+ 0, &newextent);
if (retval)
goto done;
- } else {
- retval = ext2fs_extent_fix_parents(handle);
+ retval = ext2fs_extent_get(handle,
+ EXT2_EXTENT_NEXT_LEAF,
+ &extent);
if (retval)
goto done;
}
+ extent.e_pblk++;
+ extent.e_lblk++;
+ extent.e_len--;
+ retval = ext2fs_extent_replace(handle, 0, &extent);
+ if (retval)
+ goto done;
} else {
__u32 orig_length;
if (!handle->path)
return EXT2_ET_NO_CURRENT_NODE;
+#ifdef DEBUG
+ {
+ struct ext2fs_extent extent;
+
+ retval = ext2fs_extent_get(handle, EXT2_EXTENT_CURRENT,
+ &extent);
+ if (retval == 0) {
+ printf("extent delete %u ", handle->ino);
+ dbg_print_extent(0, &extent);
+ }
+ }
+#endif
+
path = handle->path + handle->level;
if (!path->curr)
return EXT2_ET_NO_CURRENT_NODE;
return retval;
retval = ext2fs_extent_delete(handle, flags);
- handle->inode->i_blocks -= handle->fs->blocksize / 512;
- retval = ext2fs_write_inode_full(handle->fs,
- handle->ino, handle->inode,
- EXT2_INODE_SIZE(handle->fs->super));
- ext2fs_block_alloc_stats(handle->fs, extent.e_pblk, -1);
+ handle->inode->i_blocks -=
+ (handle->fs->blocksize *
+ EXT2FS_CLUSTER_RATIO(handle->fs)) / 512;
+ retval = ext2fs_write_inode(handle->fs, handle->ino,
+ handle->inode);
+ ext2fs_block_alloc_stats2(handle->fs,
+ extent.e_pblk, -1);
}
} else {
eh = (struct ext3_extent_header *) path->buf;
if (common_args_process(argc, argv, min_argc, max_argc, cmd,
usage, flags))
return 1;
-
+
if (!current_handle) {
com_err(cmd, 0, "Extent handle not open");
return 1;
struct ext2fs_extent extent;
errcode_t retval;
int op = EXT2_EXTENT_NEXT_LEAF;
- blk_t blk;
- int level = 0;
+ blk64_t blk;
+ int level = 0, err;
if (common_extent_args_process(argc, argv, 2, 3, "goto_block",
"block [level]", 0))
if (strtoblk(argv[0], argv[1], &blk))
return;
- if (argc == 3)
- if (strtoblk(argv[0], argv[2], &level))
+ if (argc == 3) {
+ level = parse_ulong(argv[2], argv[0], "level", &err);
+ if (err)
return;
+ }
retval = extent_goto(current_handle, level, (blk64_t) blk);
if (retval) {
- com_err(argv[0], retval, "while trying to go to block %lu, level %d",
- blk, level);
+ com_err(argv[0], retval,
+ "while trying to go to block %llu, level %d",
+ (unsigned long long) blk, level);
return;
}
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff