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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/ufs/swab.h
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Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/ufs/swab.h')
-rw-r--r--fs/ufs/swab.h133
1 files changed, 133 insertions, 0 deletions
diff --git a/fs/ufs/swab.h b/fs/ufs/swab.h
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+++ b/fs/ufs/swab.h
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+/*
+ * linux/fs/ufs/swab.h
+ *
+ * Copyright (C) 1997, 1998 Francois-Rene Rideau <fare@tunes.org>
+ * Copyright (C) 1998 Jakub Jelinek <jj@ultra.linux.cz>
+ * Copyright (C) 2001 Christoph Hellwig <hch@infradead.org>
+ */
+
+#ifndef _UFS_SWAB_H
+#define _UFS_SWAB_H
+
+/*
+ * Notes:
+ * HERE WE ASSUME EITHER BIG OR LITTLE ENDIAN UFSes
+ * in case there are ufs implementations that have strange bytesexes,
+ * you'll need to modify code here as well as in ufs_super.c and ufs_fs.h
+ * to support them.
+ */
+
+enum {
+ BYTESEX_LE,
+ BYTESEX_BE
+};
+
+static inline u64
+fs64_to_cpu(struct super_block *sbp, __fs64 n)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ return le64_to_cpu((__force __le64)n);
+ else
+ return be64_to_cpu((__force __be64)n);
+}
+
+static inline __fs64
+cpu_to_fs64(struct super_block *sbp, u64 n)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ return (__force __fs64)cpu_to_le64(n);
+ else
+ return (__force __fs64)cpu_to_be64(n);
+}
+
+static __inline u32
+fs64_add(struct super_block *sbp, u32 *n, int d)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ return *n = cpu_to_le64(le64_to_cpu(*n)+d);
+ else
+ return *n = cpu_to_be64(be64_to_cpu(*n)+d);
+}
+
+static __inline u32
+fs64_sub(struct super_block *sbp, u32 *n, int d)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ return *n = cpu_to_le64(le64_to_cpu(*n)-d);
+ else
+ return *n = cpu_to_be64(be64_to_cpu(*n)-d);
+}
+
+static __inline u32
+fs32_to_cpu(struct super_block *sbp, __fs32 n)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ return le32_to_cpu((__force __le32)n);
+ else
+ return be32_to_cpu((__force __be32)n);
+}
+
+static inline __fs32
+cpu_to_fs32(struct super_block *sbp, u32 n)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ return (__force __fs32)cpu_to_le32(n);
+ else
+ return (__force __fs32)cpu_to_be32(n);
+}
+
+static inline void
+fs32_add(struct super_block *sbp, __fs32 *n, int d)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ *(__le32 *)n = cpu_to_le32(le32_to_cpu(*(__le32 *)n)+d);
+ else
+ *(__be32 *)n = cpu_to_be32(be32_to_cpu(*(__be32 *)n)+d);
+}
+
+static inline void
+fs32_sub(struct super_block *sbp, __fs32 *n, int d)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ *(__le32 *)n = cpu_to_le32(le32_to_cpu(*(__le32 *)n)-d);
+ else
+ *(__be32 *)n = cpu_to_be32(be32_to_cpu(*(__be32 *)n)-d);
+}
+
+static inline u16
+fs16_to_cpu(struct super_block *sbp, __fs16 n)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ return le16_to_cpu((__force __le16)n);
+ else
+ return be16_to_cpu((__force __be16)n);
+}
+
+static inline __fs16
+cpu_to_fs16(struct super_block *sbp, u16 n)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ return (__force __fs16)cpu_to_le16(n);
+ else
+ return (__force __fs16)cpu_to_be16(n);
+}
+
+static inline void
+fs16_add(struct super_block *sbp, __fs16 *n, int d)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ *(__le16 *)n = cpu_to_le16(le16_to_cpu(*(__le16 *)n)+d);
+ else
+ *(__be16 *)n = cpu_to_be16(be16_to_cpu(*(__be16 *)n)+d);
+}
+
+static inline void
+fs16_sub(struct super_block *sbp, __fs16 *n, int d)
+{
+ if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
+ *(__le16 *)n = cpu_to_le16(le16_to_cpu(*(__le16 *)n)-d);
+ else
+ *(__be16 *)n = cpu_to_be16(be16_to_cpu(*(__be16 *)n)-d);
+}
+
+#endif /* _UFS_SWAB_H */