This commit adds two new flags for the itree. A new read-only file
system feature flag:
EXT4_FEATURE_RO_COMPAT_ITREE 0x1000
And an inode flag to indicate that a directory has itree:
EXT4_ITREE_FL = 0x10000000
EXT4_INODE_ITREE = 29
Also a macro for checking these flags on a directory was added.
Signed-off-by: Radek Pazdera <rpazdera@xxxxxxxxxx>
---
fs/ext4/ext4.h | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 5aae3d1..9512702 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -388,6 +388,7 @@ struct flex_groups {
#define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */
#define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */
#define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data. */
+#define EXT4_ITREE_FL 0x20000000 /* Directory has itree */
#define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */
#define EXT4_FL_USER_VISIBLE 0x004BDFFF /* User visible flags */
@@ -445,6 +446,7 @@ enum {
EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */
EXT4_INODE_EOFBLOCKS = 22, /* Blocks allocated beyond EOF */
EXT4_INODE_INLINE_DATA = 28, /* Data in inode. */
+ EXT4_INODE_ITREE = 29, /* Directory has itree */
EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */
};
@@ -489,6 +491,7 @@ static inline void ext4_check_flag_values(void)
CHECK_FLAG_VALUE(EA_INODE);
CHECK_FLAG_VALUE(EOFBLOCKS);
CHECK_FLAG_VALUE(INLINE_DATA);
+ CHECK_FLAG_VALUE(ITREE);
CHECK_FLAG_VALUE(RESERVED);
}
@@ -1481,6 +1484,7 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
* GDT_CSUM bits are mutually exclusive.
*/
#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400
+#define EXT4_FEATURE_RO_COMPAT_ITREE 0x1000
#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
@@ -1530,7 +1534,8 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\
EXT4_FEATURE_RO_COMPAT_BIGALLOC |\
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\
- EXT4_FEATURE_RO_COMPAT_QUOTA)
+ EXT4_FEATURE_RO_COMPAT_QUOTA|\
+ EXT4_FEATURE_RO_COMPAT_ITREE)
/*
* Default values for user and/or group using reserved blocks
@@ -1688,6 +1693,11 @@ static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize)
#define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX)
#define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
+#define dx_itree(dir) (is_dx(dir) && \
+ EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb, \
+ EXT4_FEATURE_RO_COMPAT_ITREE) && \
+ ext4_test_inode_flag((dir), EXT4_INODE_ITREE))
+
/* Legal values for the dx_root hash_version field: */
#define DX_HASH_LEGACY 0
--
1.7.11.7
--
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