Add superblock definition, and dumpe2fs and debugfs support.
Signed-off-by: Jose R. Santos <jrs@xxxxxxxxxx>
Signed-off-by: Valerie Clement <valerie.clement@xxxxxxxx>
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
---
debugfs/set_fields.c | 1 +
lib/e2p/ls.c | 3 +++
lib/ext2fs/ext2_fs.h | 5 ++++-
3 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/debugfs/set_fields.c b/debugfs/set_fields.c
index ee51c45..25343f0 100644
--- a/debugfs/set_fields.c
+++ b/debugfs/set_fields.c
@@ -132,6 +132,7 @@ static struct field_set_info super_fields[] = {
{ "mmp_interval", &set_sb.s_mmp_interval, 2, parse_uint },
{ "mmp_block", &set_sb.s_mmp_block, 8, parse_uint },
{ "raid_stripe_width", &set_sb.s_raid_stripe_width, 4, parse_uint },
+ { "log_groups_per_flex", &set_sb.s_log_groups_per_flex, 1, parse_uint },
{ 0, 0, 0, 0 }
};
diff --git a/lib/e2p/ls.c b/lib/e2p/ls.c
index b119606..c211dce 100644
--- a/lib/e2p/ls.c
+++ b/lib/e2p/ls.c
@@ -242,6 +242,9 @@ void list_super2(struct ext2_super_block * sb, FILE *f)
if (sb->s_first_meta_bg)
fprintf(f, "First meta block group: %u\n",
sb->s_first_meta_bg);
+ if (sb->s_log_groups_per_flex)
+ fprintf(f, "Flex block group size: %u\n",
+ 1 << sb->s_log_groups_per_flex);
if (sb->s_mkfs_time) {
tm = sb->s_mkfs_time;
fprintf(f, "Filesystem created: %s", ctime(&tm));
diff --git a/lib/ext2fs/ext2_fs.h b/lib/ext2fs/ext2_fs.h
index ad42cf8..f23c8fd 100644
--- a/lib/ext2fs/ext2_fs.h
+++ b/lib/ext2fs/ext2_fs.h
@@ -564,7 +564,10 @@ struct ext2_super_block {
__u16 s_mmp_interval; /* # seconds to wait in MMP checking */
__u64 s_mmp_block; /* Block for multi-mount protection */
__u32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/
- __u32 s_reserved[163]; /* Padding to the end of the block */
+ __u8 s_log_groups_per_flex; /* FLEX_BG group size */
+ __u8 s_reserved_char_pad;
+ __u16 s_reserved_pad; /* Padding to next 32bits */
+ __u32 s_reserved[162]; /* Padding to the end of the block */
};
/*
--
1.5.4.1.144.gdfee-dirty
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