1 files changed, 102 insertions, 0 deletions

diff --git a/include/linux/iflags.h b/include/linux/iflags.h
new file mode 100644
index 000000000000..5b27102dfeaf
--- /dev/null
+++ b/include/linux/iflags.h
@@ -0,0 +1,102 @@
+#ifndef _LINUX_IFLAGS_H
+#define _LINUX_IFLAGS_H
+
+/*
+ * A universal set of inode flags.
+ *
+ * Originally taken from ext2/3 with additions for other filesystems.
+ * Filesystems supporting this interface should interoperate with
+ * the lsattr and chattr command line tools.
+ *
+ * This interface is supported in whole or in part by:
+ * ext2
+ * ext3
+ * xfs
+ * jfs
+ * gfs2
+ *
+ */
+
+#define IFLAGS_GET_IOC          _IOR('f', 1, long)
+#define IFLAGS_SET_IOC          _IOW('f', 2, long)
+
+/*
+ * These values are provided for use as indices of an array
+ * for use with the iflags_cvt function below
+ */
+enum {
+        iflag_SecureRm          = 0,    /* Secure deletion */
+        iflag_Unrm              = 1,    /* Undelete */
+        iflag_Compress          = 2,    /* Compress file */
+        iflag_Sync              = 3,    /* Synchronous updates */
+        iflag_Immutable = 4,    /* Immutable */
+        iflag_Append            = 5,    /* Append */
+        iflag_NoDump            = 6,    /* Don't dump file */
+        iflag_NoAtime           = 7,    /* No atime updates */
+        /* Reserved for compression usage */
+        iflag_Dirty             = 8,
+        iflag_ComprBlk          = 9,    /* One or more compressed clusters */
+        iflag_NoComp            = 10,   /* Don't compress */
+        iflag_Ecompr            = 11,   /* Compression error */
+        /* End of compression flags */
+        iflag_Btree             = 12,   /* btree format dir */
+        iflag_Index             = 12,   /* hash-indexed directory */
+        iflag_Imagic            = 13,   /* AFS directory */
+        iflag_JournalData       = 14,   /* file data should be journaled */
+        iflag_NoTail            = 15,   /* file tail should not be merged */
+        iflag_DirSync           = 16,   /* dirsync behaviour */
+        iflag_TopDir            = 17,   /* Top of directory hierarchies */
+        iflag_Extent            = 19,   /* Extents */
+        iflag_DirectIO          = 20,   /* Always use direct I/O on this file */
+        iflag_Reserved          = 31    /* reserved for ext2/3 lib */
+};
+
+#define __IFL(x) (1<<(iflag_##x))
+#define IFLAG_SECRM             __IFL(SecureRm)         /* 0x00000001 */
+#define IFLAG_UNRM              __IFL(Unrm)             /* 0x00000002 */
+#define IFLAG_COMPR             __IFL(Compr)            /* 0x00000004 */
+#define IFLAG_SYNC              __IFL(Sync)             /* 0x00000008 */
+#define IFLAG_IMMUTABLE         __IFL(Immutable)        /* 0x00000010 */
+#define IFLAG_APPEND            __IFL(Append)           /* 0x00000020 */
+#define IFLAG_NODUMP            __IFL(NoDump)           /* 0x00000040 */
+#define IFLAG_NOATIME           __IFL(NoAtime)          /* 0x00000080 */
+#define IFLAG_DIRTY             __IFL(Dirty)            /* 0x00000100 */
+#define IFLAG_COMPRBLK          __IFL(ComprBlk)         /* 0x00000200 */
+#define IFLAG_NOCOMP            __IFL(NoComp)           /* 0x00000400 */
+#define IFLAG_ECOMPR            __IFL(Ecompr)           /* 0x00000800 */
+#define IFLAG_BTREE             __IFL(Btree)            /* 0x00001000 */
+#define IFLAG_INDEX             __IFL(Index)            /* 0x00001000 */
+#define IFLAG_IMAGIC            __IFL(Imagic)           /* 0x00002000 */
+#define IFLAG_JOURNAL_DATA      __IFL(JournalData)      /* 0x00004000 */
+#define IFLAG_NOTAIL            __IFL(NoTail)           /* 0x00008000 */
+#define IFLAG_DIRSYNC           __IFL(DirSync)          /* 0x00010000 */
+#define IFLAG_TOPDIR            __IFL(TopDir)           /* 0x00020000 */
+#define IFLAG_EXTENT            __IFL(Extent)           /* 0x00080000 */
+#define IFLAG_DIRECTIO          __IFL(DirectIO)         /* 0x00100000 */
+#define IFLAG_RESERVED          __IFL(Reserved)         /* 0x80000000 */
+
+#ifdef __KERNEL__
+/**
+ * iflags_cvt
+ * @table: A table of 32 u32 flags
+ * @val: a 32 bit value to convert
+ *
+ * This function can be used to convert between IFLAGS values and
+ * the filesystem's own flags values.
+ *
+ * Returns: the converted flags
+ */
+static inline u32 iflags_cvt(const u32 *table, u32 val)
+{
+        u32 res = 0;
+        while(val) {
+                if (val & 1)
+                        res |= *table;
+                table++;
+                val >>= 1;
+        }
+        return res;
+}
+#endif /* __KERNEL__ */
+
+#endif /* _LINUX_IFLAGS_H */