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Date: Tue, 20 Jul 2010 18:16:02 +0300
From: Amir Goldstein <amir73il@...il.com>
To: tytso@....edu, andreas.dilger@...cle.com, jack@...e.cz
Cc: linux-ext4@...r.kernel.org, Amir Goldstein <amir73il@...rs.sf.net>
Subject: [PATCH 01/12] e2fsprogs: Next3 on-disk format changes
Next3 uses a few reserved fields and flags in the Ext2 super block,
and inode structs.
Next3 defines the compatible feature 'exclude_inode', meaning that
the special exclude inode was allocated.
Next3 defines the read-only compatible features 'has_snapshot', meaning
that the file system contains snapshots.
Signed-off-by: Amir Goldstein <amir73il@...rs.sf.net>
---
lib/e2p/feature.c | 4 ++++
lib/e2p/ls.c | 12 ++++++++++++
lib/ext2fs/ext2_fs.h | 3 ++-
lib/ext2fs/ext2fs.h | 2 ++
4 files changed, 20 insertions(+), 1 deletions(-)
diff --git a/lib/e2p/feature.c b/lib/e2p/feature.c
index c7f8a35..b9dd7bd 100644
--- a/lib/e2p/feature.c
+++ b/lib/e2p/feature.c
@@ -40,6 +40,8 @@ static struct feature feature_list[] = {
"resize_inode" },
{ E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_LAZY_BG,
"lazy_bg" },
+ { E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_EXCLUDE_INODE,
+ "exclude_inode" },
{ E2P_FEATURE_RO_INCOMPAT, EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER,
"sparse_super" },
@@ -55,6 +57,8 @@ static struct feature feature_list[] = {
"dir_nlink" },
{ E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE,
"extra_isize" },
+ { E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_HAS_SNAPSHOT,
+ "has_snapshot" },
{ E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_COMPRESSION,
"compression" },
diff --git a/lib/e2p/ls.c b/lib/e2p/ls.c
index 6964519..fe12faa 100644
--- a/lib/e2p/ls.c
+++ b/lib/e2p/ls.c
@@ -160,6 +160,18 @@ static void print_super_flags(struct ext2_super_block * s, FILE *f)
fputs("test_filesystem ", f);
flags_found++;
}
+ if (s->s_flags & EXT2_FLAGS_IS_SNAPSHOT) {
+ fputs("is_snapshot ", f);
+ flags_found++;
+ }
+ if (s->s_flags & EXT2_FLAGS_FIX_SNAPSHOT) {
+ fputs("fix_snapshot ", f);
+ flags_found++;
+ }
+ if (s->s_flags & EXT2_FLAGS_FIX_EXCLUDE) {
+ fputs("fix_exclude ", f);
+ flags_found++;
+ }
if (flags_found)
fputs("\n", f);
else
diff --git a/lib/ext2fs/ext2_fs.h b/lib/ext2fs/ext2_fs.h
index fa256e5..3a65515 100644
--- a/lib/ext2fs/ext2_fs.h
+++ b/lib/ext2fs/ext2_fs.h
@@ -431,7 +431,7 @@ struct ext2_inode_large {
#define i_dir_acl i_size_high
#if defined(__KERNEL__) || defined(__linux__)
-#define i_reserved1 osd1.linux1.l_i_reserved1
+#define i_next_snapshot osd1.linux1.l_i_version
#define i_frag osd2.linux2.l_i_frag
#define i_fsize osd2.linux2.l_i_fsize
#define i_uid_low i_uid
@@ -692,6 +692,7 @@ struct ext2_super_block {
#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE)
#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
+ EXT4_FEATURE_RO_COMPAT_HAS_SNAPSHOT|\
EXT4_FEATURE_RO_COMPAT_DIR_NLINK| \
EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index e2c3b09..f0645c3 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -517,6 +517,7 @@ typedef struct ext2_icount *ext2_icount_t;
#define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\
EXT2_FEATURE_COMPAT_IMAGIC_INODES|\
EXT3_FEATURE_COMPAT_HAS_JOURNAL|\
+ EXT2_FEATURE_COMPAT_EXCLUDE_INODE|\
EXT2_FEATURE_COMPAT_RESIZE_INODE|\
EXT2_FEATURE_COMPAT_DIR_INDEX|\
EXT2_FEATURE_COMPAT_EXT_ATTR)
@@ -549,6 +550,7 @@ typedef struct ext2_icount *ext2_icount_t;
#define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\
EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\
EXT2_FEATURE_RO_COMPAT_LARGE_FILE|\
+ EXT4_FEATURE_RO_COMPAT_HAS_SNAPSHOT|\
EXT4_FEATURE_RO_COMPAT_DIR_NLINK|\
EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|\
EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
--
1.6.6
--
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