[GFS2] Update ioctl() to new interface
This is designed as a fs independent way to set flags on a
particular inode. The values of the ioctl() and flags are
designed to be identical to the ext2/3 values. Assuming that
this plan is acceptable to people in general, the plan is to
then move other fs across to using the same set of #defines,
etc.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/include/linux/iflags.h b/include/linux/iflags.h
new file mode 100644
index 0000000..1b4d9ef
--- /dev/null
+++ b/include/linux/iflags.h
@@ -0,0 +1,104 @@
+#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_DirectIO = 18, /* Always use direct I/O on this file */
+ iflag_InheritDirectIO = 19, /* Set DirectIO on new files in dir */
+ iflag_InheritJdata = 20, /* Set JournalData on create in dir */
+ 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_DIRECTIO __IFL(DirectIO) /* 0x00040000 */
+#define IFLAG_INHERITDIRECTIO __IFL(InheritDirectIO) /* 0x00080000 */
+#define IFLAG_INHERITJDATA __IFL(InheritJdata) /* 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 */