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Date: Sun, 23 Oct 2011 15:21:28 +0800
From: Yongqiang Yang <xiaoqiangnk@...il.com>
To: linux-ext4@...r.kernel.org
Cc: amir73il@...rs.sf.net, Yongqiang Yang <xiaoqiangnk@...il.com>
Subject: [PATCH 8/8] e2fsprogs: add exclude bitmap support in debugfs
Exclude bitmap is a feature needed by ext4 snapshot. This patch
adds exclude bitmap support in debugfs.
Signed-off-by: Yongqiang Yang <xiaoqiangnk@...il.com>
---
debugfs/debug_cmds.ct | 9 +++++
debugfs/debugfs.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++--
debugfs/set_fields.c | 1 +
lib/ext2fs/bitops.h | 49 +++++++++++++++++++++++++++++
4 files changed, 136 insertions(+), 4 deletions(-)
diff --git a/debugfs/debug_cmds.ct b/debugfs/debug_cmds.ct
index ea677da..2098f29 100644
--- a/debugfs/debug_cmds.ct
+++ b/debugfs/debug_cmds.ct
@@ -88,6 +88,15 @@ request do_setb, "Set a block's in-use flag",
request do_testb, "Test a block's in-use flag",
testb;
+request do_freee, "Clear a block's exclude flag",
+ freee;
+
+request do_sete, "Set a block's exclude flag",
+ sete;
+
+request do_teste, "Test a block's exclude flag",
+ teste;
+
request do_modify_inode, "Modify an inode by structure",
modify_inode, mi;
diff --git a/debugfs/debugfs.c b/debugfs/debugfs.c
index dd1435b..f839563 100644
--- a/debugfs/debugfs.c
+++ b/debugfs/debugfs.c
@@ -98,6 +98,11 @@ static void open_filesystem(char *device, int open_flags, blk64_t superblock,
com_err(device, retval, "while reading inode bitmap");
goto errout;
}
+ retval = ext2fs_read_exclude_bitmap(current_fs);
+ if (retval) {
+ com_err(device, retval, "while reading exclude bitmap");
+ goto errout;
+ }
retval = ext2fs_read_block_bitmap(current_fs);
if (retval) {
com_err(device, retval, "while reading block bitmap");
@@ -352,12 +357,14 @@ void do_show_super_stats(int argc, char *argv[])
EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
for (i = 0; i < current_fs->group_desc_count; i++) {
fprintf(out, " Group %2d: block bitmap at %llu, "
+ "exlcude bitmap at %llu, "
"inode bitmap at %llu, "
"inode table at %llu\n"
" %u free %s%s, "
"%u free %s, "
"%u used %s%s",
i, ext2fs_block_bitmap_loc(current_fs, i),
+ ext2fs_exclude_bitmap_loc(current_fs, i),
ext2fs_inode_bitmap_loc(current_fs, i),
ext2fs_inode_table_loc(current_fs, i),
ext2fs_bg_free_blocks_count(current_fs, i), units,
@@ -375,10 +382,12 @@ void do_show_super_stats(int argc, char *argv[])
ext2fs_bg_itable_unused(current_fs, i) != 1 ?
"inodes" : "inode");
first = 1;
- print_bg_opts(current_fs, i, EXT2_BG_INODE_UNINIT, "Inode not init",
- &first, out);
- print_bg_opts(current_fs, i, EXT2_BG_BLOCK_UNINIT, "Block not init",
- &first, out);
+ print_bg_opts(current_fs, i, EXT2_BG_INODE_UNINIT,
+ "Inode not init", &first, out);
+ print_bg_opts(current_fs, i, EXT2_BG_EXCLUDE_UNINIT,
+ "Exclude not init", &first, out);
+ print_bg_opts(current_fs, i, EXT2_BG_BLOCK_UNINIT,
+ "Block not init", &first, out);
if (gdt_csum) {
fprintf(out, "%sChecksum 0x%04x",
first ? " [":", ", ext2fs_bg_checksum(current_fs, i));
@@ -1074,6 +1083,70 @@ void do_testb(int argc, char *argv[])
}
}
+void do_freee(int argc, char *argv[])
+{
+ blk64_t block;
+ blk64_t count = 1;
+
+ if (!EXT2_HAS_COMPAT_FEATURE(current_fs->super,
+ EXT2_FEATURE_COMPAT_EXCLUDE_BITMAP))
+ return;
+ if (common_block_args_process(argc, argv, &block, &count))
+ return;
+ if (check_fs_read_write(argv[0]))
+ return;
+ while (count-- > 0) {
+ if (!ext2fs_test_exclude_bitmap2(current_fs->exclude_map,
+ block))
+ com_err(argv[0], 0, "Warning: block %llu already "
+ "not excluded", block);
+ ext2fs_unmark_exclude_bitmap2(current_fs->exclude_map, block);
+ block++;
+ }
+ ext2fs_mark_eb_dirty(current_fs);
+}
+
+void do_sete(int argc, char *argv[])
+{
+ blk64_t block;
+ blk64_t count = 1;
+
+ if (!EXT2_HAS_COMPAT_FEATURE(current_fs->super,
+ EXT2_FEATURE_COMPAT_EXCLUDE_BITMAP))
+ return;
+ if (common_block_args_process(argc, argv, &block, &count))
+ return;
+ if (check_fs_read_write(argv[0]))
+ return;
+ while (count-- > 0) {
+ if (ext2fs_test_exclude_bitmap2(current_fs->exclude_map, block))
+ com_err(argv[0], 0, "Warning: block %llu already "
+ "excluded", block);
+ ext2fs_mark_exclude_bitmap2(current_fs->exclude_map, block);
+ block++;
+ }
+ ext2fs_mark_eb_dirty(current_fs);
+}
+
+void do_teste(int argc, char *argv[])
+{
+ blk64_t block;
+ blk64_t count = 1;
+
+ if (!EXT2_HAS_COMPAT_FEATURE(current_fs->super,
+ EXT2_FEATURE_COMPAT_EXCLUDE_BITMAP))
+ return;
+ if (common_block_args_process(argc, argv, &block, &count))
+ return;
+ while (count-- > 0) {
+ if (ext2fs_test_exclude_bitmap2(current_fs->exclude_map, block))
+ printf("Block %llu marked excluded\n", block);
+ else
+ printf("Block %llu not excluded\n", block);
+ block++;
+ }
+}
+
static void modify_u8(char *com, const char *prompt,
const char *format, __u8 *val)
{
diff --git a/debugfs/set_fields.c b/debugfs/set_fields.c
index d461275..7ecf7d8 100644
--- a/debugfs/set_fields.c
+++ b/debugfs/set_fields.c
@@ -205,6 +205,7 @@ static struct field_set_info inode_fields[] = {
static struct field_set_info ext2_bg_fields[] = {
{ "block_bitmap", &set_gd.bg_block_bitmap, NULL, 4, parse_uint },
+ { "exclude_bitmap", &set_gd.bg_exclude_bitmap_lo, NULL, 4, parse_uint },
{ "inode_bitmap", &set_gd.bg_inode_bitmap, NULL, 4, parse_uint },
{ "inode_table", &set_gd.bg_inode_table, NULL, 4, parse_uint },
{ "free_blocks_count", &set_gd.bg_free_blocks_count, NULL, 2, parse_uint },
diff --git a/lib/ext2fs/bitops.h b/lib/ext2fs/bitops.h
index 83a01e4..64d14f9 100644
--- a/lib/ext2fs/bitops.h
+++ b/lib/ext2fs/bitops.h
@@ -72,6 +72,13 @@ extern int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
blk_t block);
extern int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);
+extern int ext2fs_mark_exclude_bitmap(ext2fs_exclude_bitmap bitmap,
+ blk_t block);
+extern int ext2fs_unmark_exclude_bitmap(ext2fs_exclude_bitmap bitmap,
+ blk_t block);
+extern int ext2fs_test_exclude_bitmap(ext2fs_exclude_bitmap bitmap,
+ blk_t block);
+
extern int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);
extern int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
ext2_ino_t inode);
@@ -415,6 +422,27 @@ _INLINE_ int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap,
block);
}
+_INLINE_ int ext2fs_mark_exclude_bitmap(ext2fs_exclude_bitmap bitmap,
+ blk_t block)
+{
+ return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
+ block);
+}
+
+_INLINE_ int ext2fs_unmark_exclude_bitmap(ext2fs_exclude_bitmap bitmap,
+ blk_t block)
+{
+ return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
+ block);
+}
+
+_INLINE_ int ext2fs_test_exclude_bitmap(ext2fs_exclude_bitmap bitmap,
+ blk_t block)
+{
+ return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap,
+ block);
+}
+
_INLINE_ int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
ext2_ino_t inode)
{
@@ -534,6 +562,27 @@ _INLINE_ int ext2fs_test_block_bitmap2(ext2fs_block_bitmap bitmap,
block);
}
+_INLINE_ int ext2fs_mark_exclude_bitmap2(ext2fs_exclude_bitmap bitmap,
+ blk64_t block)
+{
+ return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
+ block);
+}
+
+_INLINE_ int ext2fs_unmark_exclude_bitmap2(ext2fs_exclude_bitmap bitmap,
+ blk64_t block)
+{
+ return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
+ block);
+}
+
+_INLINE_ int ext2fs_test_exclude_bitmap2(ext2fs_exclude_bitmap bitmap,
+ blk64_t block)
+{
+ return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap,
+ block);
+}
+
_INLINE_ int ext2fs_mark_inode_bitmap2(ext2fs_inode_bitmap bitmap,
ext2_ino_t inode)
{
--
1.7.5.1
--
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