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@@ -344,6 +344,83 @@ static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags)
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return flags & EXT4_OTHER_FLMASK;
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}
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+/*
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+ * Inode flags used for atomic set/get
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+ */
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+enum {
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+ EXT4_INODE_SECRM = 0, /* Secure deletion */
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+ EXT4_INODE_UNRM = 1, /* Undelete */
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+ EXT4_INODE_COMPR = 2, /* Compress file */
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+ EXT4_INODE_SYNC = 3, /* Synchronous updates */
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+ EXT4_INODE_IMMUTABLE = 4, /* Immutable file */
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+ EXT4_INODE_APPEND = 5, /* writes to file may only append */
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+ EXT4_INODE_NODUMP = 6, /* do not dump file */
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+ EXT4_INODE_NOATIME = 7, /* do not update atime */
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+/* Reserved for compression usage... */
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+ EXT4_INODE_DIRTY = 8,
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+ EXT4_INODE_COMPRBLK = 9, /* One or more compressed clusters */
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+ EXT4_INODE_NOCOMPR = 10, /* Don't compress */
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+ EXT4_INODE_ECOMPR = 11, /* Compression error */
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+/* End compression flags --- maybe not all used */
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+ EXT4_INODE_INDEX = 12, /* hash-indexed directory */
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+ EXT4_INODE_IMAGIC = 13, /* AFS directory */
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+ EXT4_INODE_JOURNAL_DATA = 14, /* file data should be journaled */
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+ EXT4_INODE_NOTAIL = 15, /* file tail should not be merged */
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+ EXT4_INODE_DIRSYNC = 16, /* dirsync behaviour (directories only) */
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+ EXT4_INODE_TOPDIR = 17, /* Top of directory hierarchies*/
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+ EXT4_INODE_HUGE_FILE = 18, /* Set to each huge file */
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+ EXT4_INODE_EXTENTS = 19, /* Inode uses extents */
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+ EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */
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+ EXT4_INODE_EOFBLOCKS = 22, /* Blocks allocated beyond EOF */
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+ EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */
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+};
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+
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+#define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG))
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+#define CHECK_FLAG_VALUE(FLAG) if (!TEST_FLAG_VALUE(FLAG)) { \
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+ printk(KERN_EMERG "EXT4 flag fail: " #FLAG ": %d %d\n", \
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+ EXT4_##FLAG##_FL, EXT4_INODE_##FLAG); BUG_ON(1); }
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+
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+/*
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+ * Since it's pretty easy to mix up bit numbers and hex values, and we
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+ * can't do a compile-time test for ENUM values, we use a run-time
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+ * test to make sure that EXT4_XXX_FL is consistent with respect to
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+ * EXT4_INODE_XXX. If all is well the printk and BUG_ON will all drop
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+ * out so it won't cost any extra space in the compiled kernel image.
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+ * But it's important that these values are the same, since we are
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+ * using EXT4_INODE_XXX to test for the flag values, but EXT4_XX_FL
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+ * must be consistent with the values of FS_XXX_FL defined in
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+ * include/linux/fs.h and the on-disk values found in ext2, ext3, and
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+ * ext4 filesystems, and of course the values defined in e2fsprogs.
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+ *
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+ * It's not paranoia if the Murphy's Law really *is* out to get you. :-)
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+ */
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+static inline void ext4_check_flag_values(void)
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+{
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+ CHECK_FLAG_VALUE(SECRM);
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+ CHECK_FLAG_VALUE(UNRM);
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+ CHECK_FLAG_VALUE(COMPR);
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+ CHECK_FLAG_VALUE(SYNC);
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+ CHECK_FLAG_VALUE(IMMUTABLE);
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+ CHECK_FLAG_VALUE(APPEND);
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+ CHECK_FLAG_VALUE(NODUMP);
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+ CHECK_FLAG_VALUE(NOATIME);
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+ CHECK_FLAG_VALUE(DIRTY);
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+ CHECK_FLAG_VALUE(COMPRBLK);
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+ CHECK_FLAG_VALUE(NOCOMPR);
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+ CHECK_FLAG_VALUE(ECOMPR);
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+ CHECK_FLAG_VALUE(INDEX);
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+ CHECK_FLAG_VALUE(IMAGIC);
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+ CHECK_FLAG_VALUE(JOURNAL_DATA);
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+ CHECK_FLAG_VALUE(NOTAIL);
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+ CHECK_FLAG_VALUE(DIRSYNC);
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+ CHECK_FLAG_VALUE(TOPDIR);
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+ CHECK_FLAG_VALUE(HUGE_FILE);
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+ CHECK_FLAG_VALUE(EXTENTS);
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+ CHECK_FLAG_VALUE(EA_INODE);
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+ CHECK_FLAG_VALUE(EOFBLOCKS);
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+ CHECK_FLAG_VALUE(RESERVED);
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+}
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+
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/* Used to pass group descriptor data when online resize is done */
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struct ext4_new_group_input {
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__u32 group; /* Group number for this data */
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@@ -639,9 +716,8 @@ struct ext4_ext_cache {
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*/
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struct ext4_inode_info {
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__le32 i_data[15]; /* unconverted */
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- __u32 i_flags;
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- ext4_fsblk_t i_file_acl;
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__u32 i_dtime;
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+ ext4_fsblk_t i_file_acl;
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/*
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* i_block_group is the number of the block group which contains
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@@ -652,6 +728,7 @@ struct ext4_inode_info {
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*/
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ext4_group_t i_block_group;
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unsigned long i_state_flags; /* Dynamic state flags */
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+ unsigned long i_flags;
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ext4_lblk_t i_dir_start_lookup;
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#ifdef CONFIG_EXT4_FS_XATTR
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@@ -1087,20 +1164,22 @@ enum {
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EXT4_STATE_DIO_UNWRITTEN, /* need convert on dio done*/
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};
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-static inline int ext4_test_inode_state(struct inode *inode, int bit)
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-{
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- return test_bit(bit, &EXT4_I(inode)->i_state_flags);
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+#define EXT4_INODE_BIT_FNS(name, field) \
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+static inline int ext4_test_inode_##name(struct inode *inode, int bit) \
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+{ \
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+ return test_bit(bit, &EXT4_I(inode)->i_##field); \
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+} \
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+static inline void ext4_set_inode_##name(struct inode *inode, int bit) \
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+{ \
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+ set_bit(bit, &EXT4_I(inode)->i_##field); \
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+} \
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+static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \
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+{ \
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+ clear_bit(bit, &EXT4_I(inode)->i_##field); \
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}
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-static inline void ext4_set_inode_state(struct inode *inode, int bit)
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-{
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- set_bit(bit, &EXT4_I(inode)->i_state_flags);
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-}
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-
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-static inline void ext4_clear_inode_state(struct inode *inode, int bit)
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-{
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- clear_bit(bit, &EXT4_I(inode)->i_state_flags);
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-}
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+EXT4_INODE_BIT_FNS(flag, flags)
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+EXT4_INODE_BIT_FNS(state, state_flags)
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#else
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/* Assume that user mode programs are passing in an ext4fs superblock, not
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* a kernel struct super_block. This will allow us to call the feature-test
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@@ -1287,7 +1366,7 @@ struct ext4_dir_entry_2 {
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#define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \
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EXT4_FEATURE_COMPAT_DIR_INDEX) && \
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- (EXT4_I(dir)->i_flags & EXT4_INDEX_FL))
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+ ext4_test_inode_flag((dir), EXT4_INODE_INDEX))
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#define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX)
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#define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
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Dmitry Monakhov