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authorJose R. Santos <jrs@us.ibm.com>2007-10-16 18:38:25 -0400
committerTheodore Ts'o <tytso@mit.edu>2007-10-17 18:50:01 -0400
commitce421581794f6593830b056969ad7536ab929b2f (patch)
treef1b225ae41dbd64f9e6e931ee5454842c6b272ba /include/linux/ext4_fs.h
parentc1bddad9491b3941f7ae27eeee1e4f4822fb3169 (diff)
ext4: FLEX_BG Kernel support v2.
This feature relaxes check restrictions on where each block groups meta data is located within the storage media. This allows for the allocation of bitmaps or inode tables outside the block group boundaries in cases where bad blocks forces us to look for new blocks which the owning block group can not satisfy. This will also allow for new meta-data allocation schemes to improve performance and scalability. Signed-off-by: Jose R. Santos <jrs@us.ibm.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/ext4_fs.h')
-rw-r--r--include/linux/ext4_fs.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h
index 722d4ef12bf3..46b304d18345 100644
--- a/include/linux/ext4_fs.h
+++ b/include/linux/ext4_fs.h
@@ -682,13 +682,15 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
682#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 682#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010
683#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ 683#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */
684#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 684#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
685#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
685 686
686#define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR 687#define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
687#define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 688#define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
688 EXT4_FEATURE_INCOMPAT_RECOVER| \ 689 EXT4_FEATURE_INCOMPAT_RECOVER| \
689 EXT4_FEATURE_INCOMPAT_META_BG| \ 690 EXT4_FEATURE_INCOMPAT_META_BG| \
690 EXT4_FEATURE_INCOMPAT_EXTENTS| \ 691 EXT4_FEATURE_INCOMPAT_EXTENTS| \
691 EXT4_FEATURE_INCOMPAT_64BIT) 692 EXT4_FEATURE_INCOMPAT_64BIT| \
693 EXT4_FEATURE_INCOMPAT_FLEX_BG)
692#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 694#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
693 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 695 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
694 EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ 696 EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \