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-rw-r--r--debugfs/extent_inode.c568
1 files changed, 568 insertions, 0 deletions
diff --git a/debugfs/extent_inode.c b/debugfs/extent_inode.c
new file mode 100644
index 0000000..e4e815e
--- /dev/null
+++ b/debugfs/extent_inode.c
@@ -0,0 +1,568 @@
+/*
+ * extent_inode.c --- direct extent tree manipulation
+ *
+ * Copyright (C) 2012 Theodore Ts'o. This file may be redistributed
+ * under the terms of the GNU Public License.
+ */
+
+#include "config.h"
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+#include <time.h>
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#include <sys/types.h>
+#ifdef HAVE_GETOPT_H
+#include <getopt.h>
+#else
+extern int optind;
+extern char *optarg;
+#endif
+
+#include "debugfs.h"
+
+static ext2_ino_t current_ino;
+static ext2_extent_handle_t current_handle;
+
+static void dbg_print_extent(char *desc, struct ext2fs_extent *extent)
+{
+ if (desc)
+ printf("%s: ", desc);
+ printf("extent: lblk %llu--%llu, len %u, pblk %llu, flags: ",
+ (unsigned long long) extent->e_lblk,
+ (unsigned long long) extent->e_lblk + extent->e_len - 1,
+ extent->e_len, (unsigned long long) extent->e_pblk);
+ if (extent->e_flags & EXT2_EXTENT_FLAGS_LEAF)
+ fputs("LEAF ", stdout);
+ if (extent->e_flags & EXT2_EXTENT_FLAGS_UNINIT)
+ fputs("UNINIT ", stdout);
+ if (extent->e_flags & EXT2_EXTENT_FLAGS_SECOND_VISIT)
+ fputs("2ND_VISIT ", stdout);
+ if (!extent->e_flags)
+ fputs("(none)", stdout);
+ fputc('\n', stdout);
+
+}
+
+static int common_extent_args_process(int argc, char *argv[], int min_argc,
+ int max_argc, const char *cmd,
+ const char *usage, int flags)
+{
+ 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;
+ }
+ return 0;
+}
+
+static char *orig_prompt, *extent_prompt;
+
+void do_extent_open(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ ext2_ino_t inode;
+ int ret;
+ errcode_t retval;
+ char *cp;
+
+ if (check_fs_open(argv[0]))
+ return;
+
+ if (argc == 1) {
+ if (current_ino)
+ printf("Current inode is %u\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, &current_handle);
+ if (retval) {
+ com_err(argv[1], retval, "while opening extent handle");
+ return;
+ }
+
+ current_ino = inode;
+
+ orig_prompt = ss_get_prompt(sci_idx);
+ extent_prompt = malloc(strlen(orig_prompt) + 32);
+ if (extent_prompt == NULL) {
+ com_err(argv[1], retval, "out of memory");
+ return;
+ }
+
+ strcpy(extent_prompt, orig_prompt);
+ cp = strchr(extent_prompt, ':');
+ if (cp)
+ *cp = 0;
+ sprintf(extent_prompt + strlen(extent_prompt), " (extent ino %u): ",
+ current_ino);
+ ss_add_request_table(sci_idx, &extent_cmds, 1, &ret);
+ ss_set_prompt(sci_idx, extent_prompt);
+ return;
+}
+
+void do_extent_close(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ int ret;
+
+ if (common_args_process(argc, argv, 1, 1,
+ "extent_close", "", 0))
+ return;
+
+ if (!current_handle) {
+ com_err(argv[0], 0, "Extent handle not open");
+ return;
+ }
+
+ ext2fs_extent_free(current_handle);
+ current_handle = NULL;
+ current_ino = 0;
+ ss_delete_request_table(sci_idx, &extent_cmds, &ret);
+ ss_set_prompt(sci_idx, orig_prompt);
+ free(extent_prompt);
+ extent_prompt = NULL;
+}
+
+static void generic_goto_node(const char *my_name, int argc,
+ char **argv, int op)
+{
+ struct ext2fs_extent extent;
+ errcode_t retval;
+
+ if (my_name && common_args_process(argc, argv, 1, 1,
+ my_name, "", 0))
+ return;
+
+ if (!current_handle) {
+ com_err(argv[0], 0, "Extent handle not open");
+ return;
+ }
+
+ retval = ext2fs_extent_get(current_handle, op, &extent);
+ if (retval) {
+ com_err(argv[0], retval, 0);
+ return;
+ }
+ dbg_print_extent(0, &extent);
+}
+
+void do_current_node(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ generic_goto_node("current_node", argc, argv, EXT2_EXTENT_CURRENT);
+}
+
+void do_root_node(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ generic_goto_node("root_node", argc, argv, EXT2_EXTENT_ROOT);
+}
+
+void do_last_leaf(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ generic_goto_node("last_leaf", argc, argv, EXT2_EXTENT_LAST_LEAF);
+}
+
+void do_first_sib(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ generic_goto_node("first_sib", argc, argv, EXT2_EXTENT_FIRST_SIB);
+}
+
+void do_last_sib(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ generic_goto_node("next_sib", argc, argv, EXT2_EXTENT_LAST_SIB);
+}
+
+void do_next_sib(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ generic_goto_node("next_sib", argc, argv, EXT2_EXTENT_NEXT_SIB);
+}
+
+void do_prev_sib(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ generic_goto_node("prev_sib", argc, argv, EXT2_EXTENT_PREV_SIB);
+}
+
+void do_next_leaf(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ generic_goto_node("next_leaf", argc, argv, EXT2_EXTENT_NEXT_LEAF);
+}
+
+void do_prev_leaf(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ generic_goto_node("prev_leaf", argc, argv, EXT2_EXTENT_PREV_LEAF);
+}
+
+void do_next(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ generic_goto_node("next", argc, argv, EXT2_EXTENT_NEXT);
+}
+
+void do_prev(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ generic_goto_node("prev", argc, argv, EXT2_EXTENT_PREV);
+}
+
+void do_up(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ generic_goto_node("up", argc, argv, EXT2_EXTENT_UP);
+}
+
+void do_down(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ generic_goto_node("down", argc, argv, EXT2_EXTENT_DOWN);
+}
+
+void do_delete_node(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ struct ext2fs_extent extent;
+ errcode_t retval;
+
+ if (common_extent_args_process(argc, argv, 1, 1, "delete_node",
+ "", CHECK_FS_RW | CHECK_FS_BITMAPS))
+ return;
+
+ retval = ext2fs_extent_delete(current_handle, 0);
+ if (retval) {
+ com_err(argv[0], retval, 0);
+ return;
+ }
+
+ retval = ext2fs_extent_get(current_handle, EXT2_EXTENT_CURRENT,
+ &extent);
+ if (retval)
+ return;
+ dbg_print_extent(0, &extent);
+}
+
+void do_replace_node(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ const char *usage = "[--uninit] <lblk> <len> <pblk>";
+ errcode_t retval;
+ struct ext2fs_extent extent;
+ int err;
+
+ if (common_extent_args_process(argc, argv, 3, 5, "replace_node",
+ usage, CHECK_FS_RW | CHECK_FS_BITMAPS))
+ return;
+
+ extent.e_flags = 0;
+
+ if (!strcmp(argv[1], "--uninit")) {
+ argc--;
+ argv++;
+ extent.e_flags |= EXT2_EXTENT_FLAGS_UNINIT;
+ }
+
+ if (argc != 4) {
+ fprintf(stderr, "Usage: %s %s\n", argv[0], usage);
+ return;
+ }
+
+ err = strtoblk(argv[0], argv[1], "logical block", &extent.e_lblk);
+ if (err)
+ return;
+
+ extent.e_len = parse_ulong(argv[2], argv[0], "length", &err);
+ if (err)
+ return;
+
+ err = strtoblk(argv[0], argv[3], "physical block", &extent.e_pblk);
+ if (err)
+ return;
+
+ retval = ext2fs_extent_replace(current_handle, 0, &extent);
+ if (retval) {
+ com_err(argv[0], retval, 0);
+ return;
+ }
+ generic_goto_node(NULL, argc, argv, EXT2_EXTENT_CURRENT);
+}
+
+void do_split_node(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ errcode_t retval;
+
+ if (common_extent_args_process(argc, argv, 1, 1, "split_node",
+ "", CHECK_FS_RW | CHECK_FS_BITMAPS))
+ return;
+
+ retval = ext2fs_extent_node_split(current_handle);
+ if (retval) {
+ com_err(argv[0], retval, 0);
+ return;
+ }
+ generic_goto_node(NULL, argc, argv, EXT2_EXTENT_CURRENT);
+}
+
+void do_insert_node(int argc, char *argv[], int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ const char *usage = "[--after] [--uninit] <lblk> <len> <pblk>";
+ errcode_t retval;
+ struct ext2fs_extent extent;
+ char *cmd;
+ int err;
+ int flags = 0;
+
+ if (common_extent_args_process(argc, argv, 3, 6, "insert_node",
+ usage, CHECK_FS_RW | CHECK_FS_BITMAPS))
+ return;
+
+ cmd = argv[0];
+
+ extent.e_flags = 0;
+
+ while (argc > 2) {
+ if (!strcmp(argv[1], "--after")) {
+ argc--;
+ argv++;
+ flags |= EXT2_EXTENT_INSERT_AFTER;
+ continue;
+ }
+ if (!strcmp(argv[1], "--uninit")) {
+ argc--;
+ argv++;
+ extent.e_flags |= EXT2_EXTENT_FLAGS_UNINIT;
+ continue;
+ }
+ break;
+ }
+
+ if (argc != 4) {
+ fprintf(stderr, "usage: %s %s\n", cmd, usage);
+ return;
+ }
+
+ err = strtoblk(cmd, argv[1], "logical block", &extent.e_lblk);
+ if (err)
+ return;
+
+ extent.e_len = parse_ulong(argv[2], cmd, "length", &err);
+ if (err)
+ return;
+
+ err = strtoblk(cmd, argv[3], "physical block", &extent.e_pblk);
+ if (err)
+ return;
+
+ retval = ext2fs_extent_insert(current_handle, flags, &extent);
+ if (retval) {
+ com_err(cmd, retval, 0);
+ return;
+ }
+ generic_goto_node(NULL, argc, argv, EXT2_EXTENT_CURRENT);
+}
+
+void do_set_bmap(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ const char *usage = "[--uninit] <lblk> <pblk>";
+ struct ext2fs_extent extent;
+ errcode_t retval;
+ blk64_t logical;
+ blk64_t physical;
+ char *cmd = argv[0];
+ int flags = 0;
+ int err;
+
+ if (common_extent_args_process(argc, argv, 3, 5, "set_bmap",
+ usage, CHECK_FS_RW | CHECK_FS_BITMAPS))
+ return;
+
+ if (argc > 2 && !strcmp(argv[1], "--uninit")) {
+ argc--;
+ argv++;
+ flags |= EXT2_EXTENT_SET_BMAP_UNINIT;
+ }
+
+ if (argc != 3) {
+ fprintf(stderr, "Usage: %s %s\n", cmd, usage);
+ return;
+ }
+
+ err = strtoblk(cmd, argv[1], "logical block", &logical);
+ if (err)
+ return;
+
+ err = strtoblk(cmd, argv[2], "physical block", &physical);
+ if (err)
+ return;
+
+ retval = ext2fs_extent_set_bmap(current_handle, logical,
+ physical, flags);
+ if (retval) {
+ com_err(cmd, retval, 0);
+ return;
+ }
+
+ retval = ext2fs_extent_get(current_handle, EXT2_EXTENT_CURRENT,
+ &extent);
+ if (retval)
+ return;
+ dbg_print_extent(0, &extent);
+}
+
+void do_print_all(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ const char *usage = "[--leaf-only|--reverse|--reverse-leaf]";
+ 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 (common_extent_args_process(argc, argv, 1, 2, "print_all",
+ usage, 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 {
+ fprintf(stderr, "Usage: %s %s\n", argv[0], usage);
+ return;
+ }
+ }
+
+ 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_fix_parents(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ errcode_t retval;
+
+ if (common_extent_args_process(argc, argv, 1, 1, "fix_parents", "",
+ CHECK_FS_RW))
+ return;
+
+ retval = ext2fs_extent_fix_parents(current_handle);
+ if (retval) {
+ com_err(argv[0], retval, 0);
+ return;
+ }
+}
+
+void do_info(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ struct ext2fs_extent extent;
+ struct ext2_extent_info info;
+ errcode_t retval;
+
+ if (common_extent_args_process(argc, argv, 1, 1, "info", "", 0))
+ 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",
+ (unsigned long long) info.max_lblk,
+ (unsigned long long) 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, int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ errcode_t retval;
+ blk64_t blk;
+ int level = 0, err;
+
+ if (common_extent_args_process(argc, argv, 2, 3, "goto_block",
+ "block [level]", 0))
+ return;
+
+ if (strtoblk(argv[0], argv[1], NULL, &blk))
+ return;
+
+ if (argc == 3) {
+ level = parse_ulong(argv[2], argv[0], "level", &err);
+ if (err)
+ return;
+ }
+
+ retval = ext2fs_extent_goto2(current_handle, level, (blk64_t) blk);
+
+ if (retval) {
+ com_err(argv[0], retval,
+ "while trying to go to block %llu, level %d",
+ (unsigned long long) blk, level);
+ return;
+ }
+
+ generic_goto_node(NULL, argc, argv, EXT2_EXTENT_CURRENT);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-26 22:48:11 +0000