* 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
#include "ext2_fs.h"
#include "ext2fsP.h"
#include "e2image.h"
-#include "ss/ss.h"
/*
* Definitions to be dropped in lib/ext2fs/ext2fs.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)
}
-#define dbg_printf(fmt, args...) printf(fmt, ## args)
#else
#define dbg_show_header(eh) do { } while (0)
#define dbg_show_index(ix) do { } while (0)
#define dbg_show_extent(ex) do { } while (0)
#define dbg_print_extent(desc, ex) do { } while (0)
-#define dbg_printf(fmt, args...) do { } while (0)
#endif
/*
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 (!(handle->inode->i_flags & EXT4_EXTENTS_FL))
- return EXT2_ET_INODE_NOT_EXTENT;
+ 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];
+ for (i=0; i < EXT2_N_BLOCKS; i++)
+ if (handle->inode->i_block[i])
+ break;
+ if (i >= EXT2_N_BLOCKS) {
+ eh->eh_magic = ext2fs_cpu_to_le16(EXT3_EXT_MAGIC);
+ eh->eh_depth = 0;
+ eh->eh_entries = 0;
+ i = (sizeof(handle->inode->i_block) - sizeof(*eh)) /
+ sizeof(struct ext3_extent);
+ eh->eh_max = ext2fs_cpu_to_le16(i);
+ handle->inode->i_flags |= EXT4_EXTENTS_FL;
+ }
+
+ 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) {
- dbg_printf("<<<< OP = %s\n",
+#ifdef DEBUG_GET_EXTENT
+ printf("<<<< OP = %s\n",
(op == EXT2_EXTENT_DOWN) ? "down" :
((op == EXT2_EXTENT_UP) ? "up" : "unknown"));
+#endif
}
}
return EXT2_ET_EXTENT_NO_PREV;
}
if (op != EXT2_EXTENT_PREV_SIB) {
- dbg_printf("<<<< OP = %s\n",
+#ifdef DEBUG_GET_EXTENT
+ printf("<<<< OP = %s\n",
(op == EXT2_EXTENT_DOWN_AND_LAST) ? "down/last" :
((op == EXT2_EXTENT_UP) ? "up" : "unknown"));
+#endif
}
}
op = EXT2_EXTENT_DOWN;
else
op = EXT2_EXTENT_LAST_SIB;
- dbg_printf("<<<< OP = %s\n",
+#ifdef DEBUG_GET_EXTENT
+ printf("<<<< OP = %s\n",
(op == EXT2_EXTENT_DOWN) ? "down" : "last_sib");
+#endif
}
switch (op) {
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;
+ }
+
+ if (!(handle->fs->flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) &&
+ !ext2fs_extent_block_csum_verify(handle->fs, handle->ino,
+ eh)) {
+ handle->level--;
+ return EXT2_ET_EXTENT_CSUM_INVALID;
+ }
newpath->left = newpath->entries =
ext2fs_le16_to_cpu(eh->eh_entries);
if (handle->level < handle->max_depth)
path->visit_num = 1;
}
-
- dbg_printf("Down to level %d/%d, end_blk=%llu\n",
+#ifdef DEBUG_GET_EXTENT
+ printf("Down to level %d/%d, end_blk=%llu\n",
handle->level, handle->max_depth,
path->end_blk);
-
+#endif
break;
default:
return EXT2_ET_OP_NOT_SUPPORTED;
return EXT2_ET_NO_CURRENT_NODE;
extent->e_flags = 0;
- dbg_printf("(Left %d)\n", path->left);
+#ifdef DEBUG_GET_EXTENT
+ printf("(Left %d)\n", path->left);
+#endif
if (handle->level == handle->max_depth) {
ex = (struct ext3_extent *) ix;
blk64_t blk;
errcode_t retval;
struct ext3_extent_idx *ix;
+ struct ext3_extent_header *eh;
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,
+ /* then update the checksum */
+ eh = (struct ext3_extent_header *)
+ handle->path[handle->level].buf;
+ retval = ext2fs_extent_block_csum_set(handle->fs, handle->ino,
+ eh);
+ if (retval)
+ return retval;
+
+ retval = io_channel_write_blk64(handle->fs->io,
blk, 1, handle->path[handle->level].buf);
}
return retval;
}
#endif
-static errcode_t extent_goto(ext2_extent_handle_t handle,
- int leaf_level, blk64_t blk)
+/*
+ * Go to the node at leaf_level which contains logical block blk.
+ *
+ * leaf_level is height from the leaf node level, i.e.
+ * leaf_level 0 is at leaf node, leaf_level 1 is 1 above etc.
+ *
+ * If "blk" has no mapping (hole) then handle is left at last
+ * extent before blk.
+ */
+errcode_t ext2fs_extent_goto2(ext2_extent_handle_t handle,
+ int leaf_level, blk64_t blk)
{
struct ext2fs_extent extent;
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
+ printf("leaf level %d greater than tree depth %d\n",
+ leaf_level, handle->max_depth);
+#endif
+ 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->level - leaf_level == handle->max_depth) {
+ if (handle->max_depth - handle->level == leaf_level) {
+ /* block is in this &extent */
if ((blk >= extent.e_lblk) &&
(blk < extent.e_lblk + extent.e_len))
return 0;
- if (blk < extent.e_lblk)
+ if (blk < extent.e_lblk) {
+ retval = ext2fs_extent_get(handle,
+ EXT2_EXTENT_PREV_SIB,
+ &extent);
return EXT2_ET_EXTENT_NOT_FOUND;
+ }
retval = ext2fs_extent_get(handle,
EXT2_EXTENT_NEXT_SIB,
&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
}
}
errcode_t ext2fs_extent_goto(ext2_extent_handle_t handle,
blk64_t blk)
{
- return extent_goto(handle, 0, blk);
+ return ext2fs_extent_goto2(handle, 0, blk);
}
-errcode_t ext2fs_extent_replace(ext2_extent_handle_t handle,
+/*
+ * Traverse back up to root fixing parents of current node as needed.
+ *
+ * If we changed start of first entry in a node, fix parent index start
+ * and so on.
+ *
+ * Safe to call for any position in node; if not at the first entry,
+ * will simply return.
+ */
+errcode_t ext2fs_extent_fix_parents(ext2_extent_handle_t handle)
+{
+ int retval = 0;
+ int orig_height;
+ blk64_t start;
+ struct extent_path *path;
+ struct ext2fs_extent extent;
+ struct ext2_extent_info info;
+
+ EXT2_CHECK_MAGIC(handle, EXT2_ET_MAGIC_EXTENT_HANDLE);
+
+ if (!(handle->fs->flags & EXT2_FLAG_RW))
+ return EXT2_ET_RO_FILSYS;
+
+ if (!handle->path)
+ return EXT2_ET_NO_CURRENT_NODE;
+
+ path = handle->path + handle->level;
+ if (!path->curr)
+ return EXT2_ET_NO_CURRENT_NODE;
+
+ retval = ext2fs_extent_get(handle, EXT2_EXTENT_CURRENT, &extent);
+ if (retval)
+ goto done;
+
+ /* modified node's start block */
+ start = extent.e_lblk;
+
+ if ((retval = ext2fs_extent_get_info(handle, &info)))
+ return retval;
+ orig_height = info.max_depth - info.curr_level;
+
+ /* traverse up until index not first, or startblk matches, or top */
+ while (handle->level > 0 &&
+ (path->left == path->entries - 1)) {
+ retval = ext2fs_extent_get(handle, EXT2_EXTENT_UP, &extent);
+ if (retval)
+ goto done;
+ if (extent.e_lblk == start)
+ break;
+ path = handle->path + handle->level;
+ extent.e_len += (extent.e_lblk - start);
+ extent.e_lblk = start;
+ retval = ext2fs_extent_replace(handle, 0, &extent);
+ if (retval)
+ goto done;
+ update_path(handle);
+ }
+
+ /* put handle back to where we started */
+ retval = ext2fs_extent_goto2(handle, orig_height, start);
+done:
+ return retval;
+}
+
+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;
ex->ee_block = ext2fs_cpu_to_le32(extent->e_lblk);
ex->ee_start = ext2fs_cpu_to_le32(extent->e_pblk & 0xFFFFFFFF);
ex->ee_start_hi = ext2fs_cpu_to_le16(extent->e_pblk >> 32);
- ex->ee_len = ext2fs_cpu_to_le16(extent->e_len);
+ if (extent->e_flags & EXT2_EXTENT_FLAGS_UNINIT) {
+ if (extent->e_len > EXT_UNINIT_MAX_LEN)
+ return EXT2_ET_EXTENT_INVALID_LENGTH;
+ ex->ee_len = ext2fs_cpu_to_le16(extent->e_len +
+ EXT_INIT_MAX_LEN);
+ } else {
+ if (extent->e_len > EXT_INIT_MAX_LEN)
+ return EXT2_ET_EXTENT_INVALID_LENGTH;
+ ex->ee_len = ext2fs_cpu_to_le16(extent->e_len);
+ }
} else {
ix = path->curr;
return 0;
}
+/*
+ * allocate a new block, move half the current node to it, and update parent
+ *
+ * handle will be left pointing at original record.
+ */
+errcode_t ext2fs_extent_node_split(ext2_extent_handle_t handle)
+{
+ errcode_t retval = 0;
+ blk64_t new_node_pblk;
+ blk64_t new_node_start;
+ blk64_t orig_lblk;
+ blk64_t goal_blk = 0;
+ int orig_height;
+ char *block_buf = NULL;
+ struct ext2fs_extent extent;
+ struct extent_path *path, *newpath = 0;
+ struct ext3_extent_header *eh, *neweh;
+ int tocopy;
+ int new_root = 0;
+ struct ext2_extent_info info;
+
+ /* basic sanity */
+ EXT2_CHECK_MAGIC(handle, EXT2_ET_MAGIC_EXTENT_HANDLE);
+
+ if (!(handle->fs->flags & EXT2_FLAG_RW))
+ return EXT2_ET_RO_FILSYS;
+
+ if (!handle->path)
+ return EXT2_ET_NO_CURRENT_NODE;
+
+#ifdef DEBUG
+ printf("splitting node at level %d\n", handle->level);
+#endif
+ retval = ext2fs_extent_get(handle, EXT2_EXTENT_CURRENT, &extent);
+ if (retval)
+ goto done;
+
+ retval = ext2fs_extent_get_info(handle, &info);
+ if (retval)
+ goto done;
+
+ /* save the position we were originally splitting... */
+ orig_height = info.max_depth - info.curr_level;
+ orig_lblk = extent.e_lblk;
+
+ /* Is there room in the parent for a new entry? */
+ if (handle->level &&
+ (handle->path[handle->level - 1].entries >=
+ handle->path[handle->level - 1].max_entries)) {
+
+#ifdef DEBUG
+ printf("parent level %d full; splitting it too\n",
+ handle->level - 1);
+#endif
+ /* split the parent */
+ retval = ext2fs_extent_get(handle, EXT2_EXTENT_UP, &extent);
+ if (retval)
+ goto done;
+ goal_blk = extent.e_pblk;
+
+ retval = ext2fs_extent_node_split(handle);
+ if (retval)
+ goto done;
+
+ /* get handle back to our original split position */
+ retval = ext2fs_extent_goto2(handle, orig_height, orig_lblk);
+ if (retval)
+ goto done;
+ }
+
+ /* At this point, parent should have room for this split */
+ path = handle->path + handle->level;
+ if (!path->curr)
+ return EXT2_ET_NO_CURRENT_NODE;
+
+ /* extent header of the current node we'll split */
+ eh = (struct ext3_extent_header *)path->buf;
+
+ /* splitting root level means moving them all out */
+ if (handle->level == 0) {
+ new_root = 1;
+ tocopy = ext2fs_le16_to_cpu(eh->eh_entries);
+ retval = ext2fs_get_mem(((handle->max_depth+2) *
+ sizeof(struct extent_path)),
+ &newpath);
+ if (retval)
+ goto done;
+ memset(newpath, 0,
+ ((handle->max_depth+2) * sizeof(struct extent_path)));
+ } else {
+ tocopy = ext2fs_le16_to_cpu(eh->eh_entries) / 2;
+ }
+
+#ifdef DEBUG
+ printf("will copy out %d of %d entries at level %d\n",
+ tocopy, ext2fs_le16_to_cpu(eh->eh_entries),
+ handle->level);
+#endif
+
+ if (!tocopy) {
+#ifdef DEBUG
+ printf("Nothing to copy to new block!\n");
+#endif
+ retval = EXT2_ET_CANT_SPLIT_EXTENT;
+ goto done;
+ }
+
+ /* first we need a new block, or can do nothing. */
+ block_buf = malloc(handle->fs->blocksize);
+ if (!block_buf) {
+ retval = ENOMEM;
+ goto done;
+ }
+
+ if (!goal_blk) {
+ dgrp_t group = ext2fs_group_of_ino(handle->fs, handle->ino);
+ __u8 log_flex = handle->fs->super->s_log_groups_per_flex;
+
+ if (log_flex)
+ group = group & ~((1 << (log_flex)) - 1);
+ goal_blk = ext2fs_group_first_block2(handle->fs, group);
+ }
+ 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",
+ (unsigned long) new_node_pblk);
+#endif
+
+ /* Copy data into new block buffer */
+ /* First the header for the new block... */
+ neweh = (struct ext3_extent_header *) block_buf;
+ memcpy(neweh, eh, sizeof(struct ext3_extent_header));
+ neweh->eh_entries = ext2fs_cpu_to_le16(tocopy);
+ neweh->eh_max = ext2fs_cpu_to_le16((handle->fs->blocksize -
+ sizeof(struct ext3_extent_header)) /
+ sizeof(struct ext3_extent));
+
+ /* then the entries for the new block... */
+ memcpy(EXT_FIRST_INDEX(neweh),
+ EXT_FIRST_INDEX(eh) +
+ (ext2fs_le16_to_cpu(eh->eh_entries) - tocopy),
+ sizeof(struct ext3_extent_idx) * tocopy);
+
+ new_node_start = ext2fs_le32_to_cpu(EXT_FIRST_INDEX(neweh)->ei_block);
+
+ /* then update the checksum */
+ retval = ext2fs_extent_block_csum_set(handle->fs, handle->ino, neweh);
+ if (retval)
+ goto done;
+
+ /* ...and write the new node block out to disk. */
+ retval = io_channel_write_blk64(handle->fs->io, new_node_pblk, 1,
+ block_buf);
+
+ if (retval)
+ goto done;
+
+ /* OK! we've created the new node; now adjust the tree */
+
+ /* current path now has fewer active entries, we copied some out */
+ if (handle->level == 0) {
+ memcpy(newpath, path,
+ sizeof(struct extent_path) * (handle->max_depth+1));
+ handle->path = newpath;
+ newpath = path;
+ path = handle->path;
+ path->entries = 1;
+ path->left = path->max_entries - 1;
+ handle->max_depth++;
+ eh->eh_depth = ext2fs_cpu_to_le16(handle->max_depth);
+ } else {
+ path->entries -= tocopy;
+ path->left -= tocopy;
+ }
+
+ eh->eh_entries = ext2fs_cpu_to_le16(path->entries);
+ /* this writes out the node, incl. the modified header */
+ retval = update_path(handle);
+ if (retval)
+ goto done;
+
+ /* now go up and insert/replace index for new node we created */
+ if (new_root) {
+ retval = ext2fs_extent_get(handle, EXT2_EXTENT_FIRST_SIB, &extent);
+ if (retval)
+ goto done;
+
+ extent.e_lblk = new_node_start;
+ extent.e_pblk = new_node_pblk;
+ extent.e_len = handle->path[0].end_blk - extent.e_lblk;
+ retval = ext2fs_extent_replace(handle, 0, &extent);
+ if (retval)
+ goto done;
+ } else {
+ __u32 new_node_length;
+
+ retval = ext2fs_extent_get(handle, EXT2_EXTENT_UP, &extent);
+ /* will insert after this one; it's length is shorter now */
+ new_node_length = new_node_start - extent.e_lblk;
+ extent.e_len -= new_node_length;
+ retval = ext2fs_extent_replace(handle, 0, &extent);
+ if (retval)
+ goto done;
+
+ /* now set up the new extent and insert it */
+ extent.e_lblk = new_node_start;
+ extent.e_pblk = new_node_pblk;
+ extent.e_len = new_node_length;
+ retval = ext2fs_extent_insert(handle, EXT2_EXTENT_INSERT_AFTER, &extent);
+ if (retval)
+ goto done;
+ }
+
+ /* get handle back to our original position */
+ retval = ext2fs_extent_goto2(handle, orig_height, orig_lblk);
+ if (retval)
+ goto done;
+
+ /* new node hooked in, so update inode block count (do this here?) */
+ 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);
+ free(block_buf);
+
+ return retval;
+}
+
errcode_t ext2fs_extent_insert(ext2_extent_handle_t handle, int flags,
struct ext2fs_extent *extent)
{
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)
- return EXT2_ET_CANT_INSERT_EXTENT;
+ if (path->entries >= path->max_entries) {
+ if (flags & EXT2_EXTENT_INSERT_NOSPLIT) {
+ return EXT2_ET_CANT_INSERT_EXTENT;
+ } else {
+#ifdef DEBUG
+ printf("node full (level %d) - splitting\n",
+ handle->level);
+#endif
+ retval = ext2fs_extent_node_split(handle);
+ if (retval)
+ return retval;
+ path = handle->path + handle->level;
+ }
+ }
eh = (struct ext3_extent_header *) path->buf;
if (path->curr) {
path->curr = ix;
- if (path->left > 0)
+ if (path->left >= 0)
memmove(ix + 1, ix,
(path->left+1) * sizeof(struct ext3_extent_idx));
path->left++;
return retval;
}
-errcode_t ext2fs_extent_delete(ext2_extent_handle_t handle,
- int flags EXT2FS_ATTR((unused)))
+/*
+ * Sets the physical block for a logical file block in the extent tree.
+ *
+ * May: map unmapped, unmap mapped, or remap mapped blocks.
+ *
+ * Mapping an unmapped block adds a single-block extent.
+ *
+ * Unmapping first or last block modifies extent in-place
+ * - But may need to fix parent's starts too in first-block case
+ *
+ * Mapping any unmapped block requires adding a (single-block) extent
+ * and inserting into proper point in tree.
+ *
+ * Modifying (unmapping or remapping) a block in the middle
+ * of an extent requires splitting the extent.
+ * - Remapping case requires new single-block extent.
+ *
+ * Remapping first or last block adds an extent.
+ *
+ * We really need extent adding to be smart about merging.
+ */
+
+errcode_t ext2fs_extent_set_bmap(ext2_extent_handle_t handle,
+ blk64_t logical, blk64_t physical, int flags)
+{
+ errcode_t ec, retval = 0;
+ 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, 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;
+
+ if (!handle->path)
+ return EXT2_ET_NO_CURRENT_NODE;
+
+ path = handle->path + handle->level;
+
+ if (flags & EXT2_EXTENT_SET_BMAP_UNINIT) {
+ new_uninit = 1;
+ max_len = EXT_UNINIT_MAX_LEN;
+ }
+
+ /* if (re)mapping, set up new extent to insert */
+ if (physical) {
+ newextent.e_len = 1;
+ newextent.e_pblk = physical;
+ newextent.e_lblk = logical;
+ newextent.e_flags = EXT2_EXTENT_FLAGS_LEAF;
+ if (new_uninit)
+ newextent.e_flags |= EXT2_EXTENT_FLAGS_UNINIT;
+ }
+
+ /* special case if the extent tree is completely empty */
+ if ((handle->max_depth == 0) && (path->entries == 0)) {
+ retval = ext2fs_extent_insert(handle, 0, &newextent);
+ return retval;
+ }
+
+ /* save our original location in the extent tree */
+ if ((retval = ext2fs_extent_get(handle, EXT2_EXTENT_CURRENT,
+ &extent))) {
+ if (retval != EXT2_ET_NO_CURRENT_NODE)
+ return retval;
+ memset(&extent, 0, sizeof(extent));
+ }
+ if ((retval = ext2fs_extent_get_info(handle, &info)))
+ return retval;
+ orig_height = info.max_depth - info.curr_level;
+ orig_lblk = extent.e_lblk;
+
+ /* go to the logical spot we want to (re/un)map */
+ retval = ext2fs_extent_goto(handle, logical);
+ if (retval) {
+ if (retval == EXT2_ET_EXTENT_NOT_FOUND) {
+ retval = 0;
+ mapped = 0;
+ if (!physical) {
+#ifdef DEBUG
+ printf("block %llu already unmapped\n",
+ logical);
+#endif
+ goto done;
+ }
+ } else
+ goto done;
+ }
+
+ /*
+ * 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) &&
+ (extent.e_pblk + (logical - extent.e_lblk) == physical)) {
+#ifdef DEBUG
+ printf("physical block (at %llu) unchanged\n", logical);
+#endif
+ goto done;
+ }
+
+ if (!mapped) {
+#ifdef DEBUG
+ printf("mapping unmapped logical block %llu\n", logical);
+#endif
+ if ((logical == extent.e_lblk + extent.e_len) &&
+ (physical == extent.e_pblk + extent.e_len) &&
+ (new_uninit == extent_uninit) &&
+ ((int) extent.e_len < max_len-1)) {
+ extent.e_len++;
+ retval = ext2fs_extent_replace(handle, 0, &extent);
+ } 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)
+ goto done;
+ retval = ext2fs_extent_fix_parents(handle);
+ if (retval)
+ goto done;
+ } else if ((logical == extent.e_lblk) && (extent.e_len == 1)) {
+#ifdef DEBUG
+ printf("(re/un)mapping only block in extent\n");
+#endif
+ if (physical) {
+ retval = ext2fs_extent_replace(handle, 0, &newextent);
+ } else {
+ retval = ext2fs_extent_delete(handle, 0);
+ if (retval)
+ goto done;
+ ec = ext2fs_extent_fix_parents(handle);
+ if (ec != EXT2_ET_NO_CURRENT_NODE)
+ retval = ec;
+ }
+
+ if (retval)
+ goto done;
+ } else if (logical == extent.e_lblk + extent.e_len - 1) {
+#ifdef DEBUG
+ printf("(re/un)mapping last block in extent\n");
+#endif
+ if (physical) {
+ 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;
+ retval = ext2fs_extent_fix_parents(handle);
+ 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;
+ }
+ 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) {
+ 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;
+ 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;
+ retval = ext2fs_extent_fix_parents(handle);
+ if (retval)
+ goto done;
+ } else {
+ __u32 orig_length;
+
+#ifdef DEBUG
+ printf("(re/un)mapping in middle of extent\n");
+#endif
+ /* need to split this extent; later */
+
+ orig_length = extent.e_len;
+
+ /* shorten pre-split extent */
+ extent.e_len = (logical - extent.e_lblk);
+ retval = ext2fs_extent_replace(handle, 0, &extent);
+ if (retval)
+ goto done;
+ /* insert our new extent, if any */
+ if (physical) {
+ /* insert new extent after current */
+ retval = ext2fs_extent_insert(handle,
+ EXT2_EXTENT_INSERT_AFTER, &newextent);
+ if (retval)
+ goto done;
+ }
+ /* add post-split extent */
+ extent.e_pblk += extent.e_len + 1;
+ extent.e_lblk += extent.e_len + 1;
+ extent.e_len = orig_length - extent.e_len - 1;
+ retval = ext2fs_extent_insert(handle,
+ EXT2_EXTENT_INSERT_AFTER, &extent);
+ if (retval)
+ goto done;
+ }
+
+done:
+ /* get handle back to its position */
+ if (orig_height > handle->max_depth)
+ orig_height = handle->max_depth; /* In case we shortened the tree */
+ ext2fs_extent_goto2(handle, orig_height, orig_lblk);
+ return retval;
+}
+
+errcode_t ext2fs_extent_delete(ext2_extent_handle_t handle, int flags)
{
struct extent_path *path;
char *cp;
struct ext3_extent_header *eh;
- errcode_t retval;
+ errcode_t retval = 0;
EXT2_CHECK_MAGIC(handle, EXT2_ET_MAGIC_EXTENT_HANDLE);
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;
ix--;
path->curr = ix;
}
- path->entries--;
- if (path->entries == 0)
+ if (--path->entries == 0)
path->curr = 0;
- eh = (struct ext3_extent_header *) path->buf;
- eh->eh_entries = ext2fs_cpu_to_le16(path->entries);
+ /* if non-root node has no entries left, remove it & parent ptr to it */
+ if (path->entries == 0 && handle->level) {
+ if (!(flags & EXT2_EXTENT_DELETE_KEEP_EMPTY)) {
+ struct ext2fs_extent extent;
- retval = update_path(handle);
+ retval = ext2fs_extent_get(handle, EXT2_EXTENT_UP,
+ &extent);
+ if (retval)
+ return retval;
+ retval = ext2fs_extent_delete(handle, flags);
+ 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;
+ eh->eh_entries = ext2fs_cpu_to_le16(path->entries);
+ if ((path->entries == 0) && (handle->level == 0))
+ eh->eh_depth = handle->max_depth = 0;
+ retval = update_path(handle);
+ }
return retval;
}
}
#ifdef DEBUG
-
-#include "debugfs.h"
-
/*
- * Hook in new commands into debugfs
+ * Override debugfs's prompt
*/
const char *debug_prog_name = "tst_extents";
-extern ss_request_table extent_cmds;
-ss_request_table *extra_cmds = &extent_cmds;
-
-ext2_ino_t current_ino = 0;
-ext2_extent_handle_t current_handle;
-
-void do_inode(int argc, char *argv[])
-{
- ext2_ino_t inode;
- int i;
- struct ext3_extent_header *eh;
- errcode_t retval;
-
- if (check_fs_open(argv[0]))
- return;
-
- if (argc == 1) {
- if (current_ino)
- printf("Current inode is %d\n", current_ino);
- else
- printf("No current inode\n");
- return;
- }
-
- if (common_inode_args_process(argc, argv, &inode, 0)) {
- return;
- }
-
- current_ino = 0;
-
- retval = ext2fs_extent_open(current_fs, inode, ¤t_handle);
- if (retval) {
- com_err(argv[1], retval, "while opening extent handle");
- return;
- }
-
- current_ino = inode;
-
- printf("Loaded inode %d\n", current_ino);
-
- return;
-}
-
-void generic_goto_node(char *cmd_name, int op)
-{
- struct ext2fs_extent extent;
- errcode_t retval;
-
- if (check_fs_open(cmd_name))
- return;
-
- if (!current_handle) {
- com_err(cmd_name, 0, "Extent handle not open");
- return;
- }
-
- retval = ext2fs_extent_get(current_handle, op, &extent);
- if (retval) {
- com_err(cmd_name, retval, 0);
- return;
- }
- dbg_print_extent(0, &extent);
-}
-
-void do_current_node(int argc, char *argv[])
-{
- generic_goto_node(argv[0], EXT2_EXTENT_CURRENT);
-}
-
-void do_root_node(int argc, char *argv[])
-{
- generic_goto_node(argv[0], EXT2_EXTENT_ROOT);
-}
-
-void do_last_leaf(int argc, char *argv[])
-{
- generic_goto_node(argv[0], EXT2_EXTENT_LAST_LEAF);
-}
-
-void do_first_sib(int argc, char *argv[])
-{
- generic_goto_node(argv[0], EXT2_EXTENT_FIRST_SIB);
-}
-
-void do_last_sib(int argc, char *argv[])
-{
- generic_goto_node(argv[0], EXT2_EXTENT_LAST_SIB);
-}
-
-void do_next_sib(int argc, char *argv[])
-{
- generic_goto_node(argv[0], EXT2_EXTENT_NEXT_SIB);
-}
-
-void do_prev_sib(int argc, char *argv[])
-{
- generic_goto_node(argv[0], EXT2_EXTENT_PREV_SIB);
-}
-
-void do_next_leaf(int argc, char *argv[])
-{
- generic_goto_node(argv[0], EXT2_EXTENT_NEXT_LEAF);
-}
-
-void do_prev_leaf(int argc, char *argv[])
-{
- generic_goto_node(argv[0], EXT2_EXTENT_PREV_LEAF);
-}
-
-void do_next(int argc, char *argv[])
-{
- generic_goto_node(argv[0], EXT2_EXTENT_NEXT);
-}
-
-void do_prev(int argc, char *argv[])
-{
- generic_goto_node(argv[0], EXT2_EXTENT_PREV);
-}
-
-void do_up(int argc, char *argv[])
-{
- generic_goto_node(argv[0], EXT2_EXTENT_UP);
-}
-
-void do_down(int argc, char *argv[])
-{
- generic_goto_node(argv[0], EXT2_EXTENT_DOWN);
-}
-
-void do_delete_node(int argc, char *argv[])
-{
- errcode_t retval;
- int err;
-
- if (check_fs_read_write(argv[0]))
- return;
-
- retval = ext2fs_extent_delete(current_handle, 0);
- if (retval) {
- com_err(argv[0], retval, 0);
- return;
- }
- do_current_node(argc, argv);
-}
-
-void do_replace_node(int argc, char *argv[])
-{
- errcode_t retval;
- struct ext2fs_extent extent;
- int err;
-
- if (check_fs_read_write(argv[0]))
- return;
-
- if (argc != 4) {
- fprintf(stderr, "usage: %s <lblk> <len> <pblk>\n", argv[0]);
- return;
- }
-
- extent.e_lblk = parse_ulong(argv[1], argv[0],
- "logical block", &err);
- if (err)
- return;
-
- extent.e_len = parse_ulong(argv[2], argv[0],
- "logical block", &err);
- if (err)
- return;
-
- extent.e_pblk = parse_ulong(argv[3], argv[0],
- "logical block", &err);
- if (err)
- return;
-
- retval = ext2fs_extent_replace(current_handle, 0, &extent);
- if (retval) {
- com_err(argv[0], retval, 0);
- return;
- }
- do_current_node(argc, argv);
-}
-
-void do_insert_node(int argc, char *argv[])
-{
- errcode_t retval;
- struct ext2fs_extent extent;
- char *cmd;
- int err;
- int flags = 0;
-
- if (check_fs_read_write(argv[0]))
- return;
-
- cmd = argv[0];
-
- if (argc > 2 && !strcmp(argv[1], "--after")) {
- argc--;
- argv++;
- flags |= EXT2_EXTENT_INSERT_AFTER;
- }
-
- if (argc != 4) {
- fprintf(stderr, "usage: %s <lblk> <len> <pblk>\n", cmd);
- return;
- }
-
- extent.e_lblk = parse_ulong(argv[1], cmd,
- "logical block", &err);
- if (err)
- return;
-
- extent.e_len = parse_ulong(argv[2], cmd,
- "length", &err);
- if (err)
- return;
-
- extent.e_pblk = parse_ulong(argv[3], cmd,
- "pysical block", &err);
- if (err)
- return;
-
- retval = ext2fs_extent_insert(current_handle, flags, &extent);
- if (retval) {
- com_err(cmd, retval, 0);
- return;
- }
- do_current_node(argc, argv);
-}
-
-void do_print_all(int argc, char **argv)
-{
- struct ext2fs_extent extent;
- errcode_t retval;
- errcode_t end_err = EXT2_ET_EXTENT_NO_NEXT;
- int op = EXT2_EXTENT_NEXT;
- int first_op = EXT2_EXTENT_ROOT;
-
- if (check_fs_open(argv[0]))
- return;
-
- if (!current_handle) {
- com_err(argv[0], 0, "Extent handle not open");
- return;
- }
-
- if (argc > 2) {
- print_usage:
- fprintf(stderr,
- "Usage: %s [--leaf-only|--reverse|--reverse-leaf]\n",
- argv[0]);
- return;
- }
-
- if (argc == 2) {
- if (!strcmp(argv[1], "--leaf-only"))
- op = EXT2_EXTENT_NEXT_LEAF;
- else if (!strcmp(argv[1], "--reverse")) {
- op = EXT2_EXTENT_PREV;
- first_op = EXT2_EXTENT_LAST_LEAF;
- end_err = EXT2_ET_EXTENT_NO_PREV;
- } else if (!strcmp(argv[1], "--reverse-leaf")) {
- op = EXT2_EXTENT_PREV_LEAF;
- first_op = EXT2_EXTENT_LAST_LEAF;
- end_err = EXT2_ET_EXTENT_NO_PREV;
- } else
- goto print_usage;
- }
-
- retval = ext2fs_extent_get(current_handle, first_op, &extent);
- if (retval) {
- com_err(argv[0], retval, 0);
- return;
- }
- dbg_print_extent(0, &extent);
-
- while (1) {
- retval = ext2fs_extent_get(current_handle, op, &extent);
- if (retval == end_err)
- break;
-
- if (retval) {
- com_err(argv[0], retval, 0);
- return;
- }
- dbg_print_extent(0, &extent);
- }
-}
-
-void do_info(int argc, char **argv)
-{
- struct ext2fs_extent extent;
- struct ext2_extent_info info;
- errcode_t retval;
-
- if (check_fs_open(argv[0]))
- return;
-
- if (!current_handle) {
- com_err(argv[0], 0, "Extent handle not open");
- return;
- }
-
- retval = ext2fs_extent_get_info(current_handle, &info);
- if (retval) {
- com_err(argv[0], retval, 0);
- return;
- }
-
- retval = ext2fs_extent_get(current_handle,
- EXT2_EXTENT_CURRENT, &extent);
- if (retval) {
- com_err(argv[0], retval, 0);
- return;
- }
-
- dbg_print_extent(0, &extent);
-
- printf("Current handle location: %d/%d (max: %d, bytes %d), level %d/%d\n",
- info.curr_entry, info.num_entries, info.max_entries,
- info.bytes_avail, info.curr_level, info.max_depth);
- printf("\tmax lblk: %llu, max pblk: %llu\n", info.max_lblk,
- info.max_pblk);
- printf("\tmax_len: %u, max_uninit_len: %u\n", info.max_len,
- info.max_uninit_len);
-}
-
-void do_goto_block(int argc, char **argv)
-{
- struct ext2fs_extent extent;
- errcode_t retval;
- int op = EXT2_EXTENT_NEXT_LEAF;
- blk_t blk;
-
- if (check_fs_open(argv[0]))
- return;
-
- if (!current_handle) {
- com_err(argv[0], 0, "Extent handle not open");
- return;
- }
-
- if (argc != 2) {
- fprintf(stderr, "%s block\n", argv[0]);
- return;
- }
-
- if (strtoblk(argv[0], argv[1], &blk))
- return;
-
- retval = ext2fs_extent_goto(current_handle, (blk64_t) blk);
- if (retval) {
- com_err(argv[0], retval, "while trying to go to block %lu",
- blk);
- return;
- }
-
- generic_goto_node(argv[0], EXT2_EXTENT_CURRENT);
-}
#endif
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff