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authorDarrick J. Wong <darrick.wong@oracle.com>2015-10-17 16:18:43 -0400
committerTheodore Ts'o <tytso@mit.edu>2015-10-17 16:18:43 -0400
commite2b911c53584a92266943f3b7f2cdbc19c1a4e80 (patch)
tree2f1fd1771ef5e3a24b05c1fad3dc9026b3ecd73d /fs/ext4/ext4.h
parent6a797d2737838906f2ea0a31686e87c3151e21ca (diff)
downloadlinux-e2b911c53584a92266943f3b7f2cdbc19c1a4e80.tar.bz2
ext4: clean up feature test macros with predicate functions
Create separate predicate functions to test/set/clear feature flags, thereby replacing the wordy old macros. Furthermore, clean out the places where we open-coded feature tests. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/ext4/ext4.h')
-rw-r--r--fs/ext4/ext4.h146
1 files changed, 132 insertions, 14 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 6c0797346da1..b1d04aa724be 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1528,6 +1528,7 @@ static inline int ext4_encrypted_inode(struct inode *inode)
* Feature set definitions
*/
+/* Use the ext4_{has,set,clear}_feature_* helpers; these will be removed */
#define EXT4_HAS_COMPAT_FEATURE(sb,mask) \
((EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask)) != 0)
#define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask) \
@@ -1590,6 +1591,94 @@ static inline int ext4_encrypted_inode(struct inode *inode)
#define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */
#define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000
+#define EXT4_FEATURE_COMPAT_FUNCS(name, flagname) \
+static inline bool ext4_has_feature_##name(struct super_block *sb) \
+{ \
+ return ((EXT4_SB(sb)->s_es->s_feature_compat & \
+ cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname)) != 0); \
+} \
+static inline void ext4_set_feature_##name(struct super_block *sb) \
+{ \
+ EXT4_SB(sb)->s_es->s_feature_compat |= \
+ cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \
+} \
+static inline void ext4_clear_feature_##name(struct super_block *sb) \
+{ \
+ EXT4_SB(sb)->s_es->s_feature_compat &= \
+ ~cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \
+}
+
+#define EXT4_FEATURE_RO_COMPAT_FUNCS(name, flagname) \
+static inline bool ext4_has_feature_##name(struct super_block *sb) \
+{ \
+ return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \
+ cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname)) != 0); \
+} \
+static inline void ext4_set_feature_##name(struct super_block *sb) \
+{ \
+ EXT4_SB(sb)->s_es->s_feature_ro_compat |= \
+ cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \
+} \
+static inline void ext4_clear_feature_##name(struct super_block *sb) \
+{ \
+ EXT4_SB(sb)->s_es->s_feature_ro_compat &= \
+ ~cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \
+}
+
+#define EXT4_FEATURE_INCOMPAT_FUNCS(name, flagname) \
+static inline bool ext4_has_feature_##name(struct super_block *sb) \
+{ \
+ return ((EXT4_SB(sb)->s_es->s_feature_incompat & \
+ cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname)) != 0); \
+} \
+static inline void ext4_set_feature_##name(struct super_block *sb) \
+{ \
+ EXT4_SB(sb)->s_es->s_feature_incompat |= \
+ cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \
+} \
+static inline void ext4_clear_feature_##name(struct super_block *sb) \
+{ \
+ EXT4_SB(sb)->s_es->s_feature_incompat &= \
+ ~cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \
+}
+
+EXT4_FEATURE_COMPAT_FUNCS(dir_prealloc, DIR_PREALLOC)
+EXT4_FEATURE_COMPAT_FUNCS(imagic_inodes, IMAGIC_INODES)
+EXT4_FEATURE_COMPAT_FUNCS(journal, HAS_JOURNAL)
+EXT4_FEATURE_COMPAT_FUNCS(xattr, EXT_ATTR)
+EXT4_FEATURE_COMPAT_FUNCS(resize_inode, RESIZE_INODE)
+EXT4_FEATURE_COMPAT_FUNCS(dir_index, DIR_INDEX)
+EXT4_FEATURE_COMPAT_FUNCS(sparse_super2, SPARSE_SUPER2)
+
+EXT4_FEATURE_RO_COMPAT_FUNCS(sparse_super, SPARSE_SUPER)
+EXT4_FEATURE_RO_COMPAT_FUNCS(large_file, LARGE_FILE)
+EXT4_FEATURE_RO_COMPAT_FUNCS(btree_dir, BTREE_DIR)
+EXT4_FEATURE_RO_COMPAT_FUNCS(huge_file, HUGE_FILE)
+EXT4_FEATURE_RO_COMPAT_FUNCS(gdt_csum, GDT_CSUM)
+EXT4_FEATURE_RO_COMPAT_FUNCS(dir_nlink, DIR_NLINK)
+EXT4_FEATURE_RO_COMPAT_FUNCS(extra_isize, EXTRA_ISIZE)
+EXT4_FEATURE_RO_COMPAT_FUNCS(quota, QUOTA)
+EXT4_FEATURE_RO_COMPAT_FUNCS(bigalloc, BIGALLOC)
+EXT4_FEATURE_RO_COMPAT_FUNCS(metadata_csum, METADATA_CSUM)
+EXT4_FEATURE_RO_COMPAT_FUNCS(readonly, READONLY)
+EXT4_FEATURE_RO_COMPAT_FUNCS(project, PROJECT)
+
+EXT4_FEATURE_INCOMPAT_FUNCS(compression, COMPRESSION)
+EXT4_FEATURE_INCOMPAT_FUNCS(filetype, FILETYPE)
+EXT4_FEATURE_INCOMPAT_FUNCS(journal_needs_recovery, RECOVER)
+EXT4_FEATURE_INCOMPAT_FUNCS(journal_dev, JOURNAL_DEV)
+EXT4_FEATURE_INCOMPAT_FUNCS(meta_bg, META_BG)
+EXT4_FEATURE_INCOMPAT_FUNCS(extents, EXTENTS)
+EXT4_FEATURE_INCOMPAT_FUNCS(64bit, 64BIT)
+EXT4_FEATURE_INCOMPAT_FUNCS(mmp, MMP)
+EXT4_FEATURE_INCOMPAT_FUNCS(flex_bg, FLEX_BG)
+EXT4_FEATURE_INCOMPAT_FUNCS(ea_inode, EA_INODE)
+EXT4_FEATURE_INCOMPAT_FUNCS(dirdata, DIRDATA)
+EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed, CSUM_SEED)
+EXT4_FEATURE_INCOMPAT_FUNCS(largedir, LARGEDIR)
+EXT4_FEATURE_INCOMPAT_FUNCS(inline_data, INLINE_DATA)
+EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT)
+
#define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
#define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
EXT4_FEATURE_INCOMPAT_META_BG)
@@ -1605,7 +1694,7 @@ static inline int ext4_encrypted_inode(struct inode *inode)
EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
-#define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
+#define EXT4_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
#define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
EXT4_FEATURE_INCOMPAT_RECOVER| \
EXT4_FEATURE_INCOMPAT_META_BG| \
@@ -1627,6 +1716,40 @@ static inline int ext4_encrypted_inode(struct inode *inode)
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\
EXT4_FEATURE_RO_COMPAT_QUOTA)
+#define EXTN_FEATURE_FUNCS(ver) \
+static inline bool ext4_has_unknown_ext##ver##_compat_features(struct super_block *sb) \
+{ \
+ return ((EXT4_SB(sb)->s_es->s_feature_compat & \
+ cpu_to_le32(~EXT##ver##_FEATURE_COMPAT_SUPP)) != 0); \
+} \
+static inline bool ext4_has_unknown_ext##ver##_ro_compat_features(struct super_block *sb) \
+{ \
+ return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \
+ cpu_to_le32(~EXT##ver##_FEATURE_RO_COMPAT_SUPP)) != 0); \
+} \
+static inline bool ext4_has_unknown_ext##ver##_incompat_features(struct super_block *sb) \
+{ \
+ return ((EXT4_SB(sb)->s_es->s_feature_incompat & \
+ cpu_to_le32(~EXT##ver##_FEATURE_INCOMPAT_SUPP)) != 0); \
+}
+
+EXTN_FEATURE_FUNCS(2)
+EXTN_FEATURE_FUNCS(3)
+EXTN_FEATURE_FUNCS(4)
+
+static inline bool ext4_has_compat_features(struct super_block *sb)
+{
+ return (EXT4_SB(sb)->s_es->s_feature_compat != 0);
+}
+static inline bool ext4_has_ro_compat_features(struct super_block *sb)
+{
+ return (EXT4_SB(sb)->s_es->s_feature_ro_compat != 0);
+}
+static inline bool ext4_has_incompat_features(struct super_block *sb)
+{
+ return (EXT4_SB(sb)->s_es->s_feature_incompat != 0);
+}
+
/*
* Default values for user and/or group using reserved blocks
*/
@@ -1777,8 +1900,7 @@ static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize)
* (c) Daniel Phillips, 2001
*/
-#define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \
- EXT4_FEATURE_COMPAT_DIR_INDEX) && \
+#define is_dx(dir) (ext4_has_feature_dir_index((dir)->i_sb) && \
ext4_test_inode_flag((dir), EXT4_INODE_INDEX))
#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)
@@ -2079,7 +2201,7 @@ int ext4_init_crypto(void);
void ext4_exit_crypto(void);
static inline int ext4_sb_has_crypto(struct super_block *sb)
{
- return EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT);
+ return ext4_has_feature_encrypt(sb);
}
#else
static inline int ext4_init_crypto(void) { return 0; }
@@ -2200,8 +2322,7 @@ int ext4_insert_dentry(struct inode *dir,
struct ext4_filename *fname);
static inline void ext4_update_dx_flag(struct inode *inode)
{
- if (!EXT4_HAS_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_COMPAT_DIR_INDEX))
+ if (!ext4_has_feature_dir_index(inode->i_sb))
ext4_clear_inode_flag(inode, EXT4_INODE_INDEX);
}
static unsigned char ext4_filetype_table[] = {
@@ -2210,8 +2331,7 @@ static unsigned char ext4_filetype_table[] = {
static inline unsigned char get_dtype(struct super_block *sb, int filetype)
{
- if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE) ||
- (filetype >= EXT4_FT_MAX))
+ if (!ext4_has_feature_filetype(sb) || filetype >= EXT4_FT_MAX)
return DT_UNKNOWN;
return ext4_filetype_table[filetype];
@@ -2543,15 +2663,13 @@ extern int ext4_register_li_request(struct super_block *sb,
static inline int ext4_has_group_desc_csum(struct super_block *sb)
{
- return EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_GDT_CSUM) ||
- (EXT4_SB(sb)->s_chksum_driver != NULL);
+ return ext4_has_feature_gdt_csum(sb) ||
+ EXT4_SB(sb)->s_chksum_driver != NULL;
}
static inline int ext4_has_metadata_csum(struct super_block *sb)
{
- WARN_ON_ONCE(EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
+ WARN_ON_ONCE(ext4_has_feature_metadata_csum(sb) &&
!EXT4_SB(sb)->s_chksum_driver);
return (EXT4_SB(sb)->s_chksum_driver != NULL);
@@ -2898,7 +3016,7 @@ static unsigned char ext4_type_by_mode[S_IFMT >> S_SHIFT] = {
static inline void ext4_set_de_type(struct super_block *sb,
struct ext4_dir_entry_2 *de,
umode_t mode) {
- if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE))
+ if (ext4_has_feature_filetype(sb))
de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
}