[PATCH 2/3] Fix problems on multi-TB filesystem and file

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This is a patch to add blkcnt_t as the type of inode.i_blocks.
This enables you to make the size of blkcnt_t either 4 bytes or 8 bytes
on 32 bits architecture with CONFIG_LSF.

The content of the patch attached to this mail is below.
- CONFIG_LSF
  Add new configuration parameter.
- blkcnt_t
  On h8300, i386, mips, powerpc, s390 and sh that define sector_t,
  blkcnt_t is defined as u64 if CONFIG_LSF is enabled; otherwise it is
  defined as unsigned long.
  On other architectures, it is defined as unsigned long.
- inode.i_blocks
  Change the type from sector_t to blkcnt_t.

Any feedback and comments are welcome.

Signed-off-by: Takashi Sato <[email protected]>

diff -uprN -X linux-2.6.15-iblocks/Documentation/dontdiff linux-2.6.15-iblocks/block/Kconfig linux-2.6.15-lsf/block/Kconfig
--- linux-2.6.15-iblocks/block/Kconfig	2006-01-03 12:21:10.000000000 +0900
+++ linux-2.6.15-lsf/block/Kconfig	2006-01-04 15:37:17.000000000 +0900
@@ -6,9 +6,19 @@
 config LBD
 	bool "Support for Large Block Devices"
 	depends on X86 || (MIPS && 32BIT) || PPC32 || ARCH_S390_31 || SUPERH || UML
+	select LSF
 	help
 	  Say Y here if you want to attach large (bigger than 2TB) discs to
 	  your machine, or if you want to have a raid or loopback device
 	  bigger than 2TB.  Otherwise say N.

+config LSF
+	bool "Support for Large Single Files"
+	depends on X86 || (MIPS && 32BIT) || PPC32 || ARCH_S390_31 || SUPERH || UML
+	default n
+	help
+	  When CONFIG_LBD is disabled, say Y here if you want to
+	  handle large file(bigger than 2TB), otherwise say N.
+	  When CONFIG_LBD is enabled, Y is set automatically.
+
 source block/Kconfig.iosched
diff -uprN -X linux-2.6.15-iblocks/Documentation/dontdiff linux-2.6.15-iblocks/include/asm-h8300/types.h
linux-2.6.15-lsf/include/asm-h8300/types.h
--- linux-2.6.15-iblocks/include/asm-h8300/types.h	2006-01-03 12:21:10.000000000 +0900
+++ linux-2.6.15-lsf/include/asm-h8300/types.h	2006-01-04 15:37:17.000000000 +0900
@@ -58,6 +58,9 @@ typedef u32 dma_addr_t;
 #define HAVE_SECTOR_T
 typedef u64 sector_t;

+#define HAVE_BLKCNT_T
+typedef u64 blkcnt_t;
+
 #endif /* __KERNEL__ */

 #endif /* __ASSEMBLY__ */
diff -uprN -X linux-2.6.15-iblocks/Documentation/dontdiff linux-2.6.15-iblocks/include/asm-i386/types.h
linux-2.6.15-lsf/include/asm-i386/types.h
--- linux-2.6.15-iblocks/include/asm-i386/types.h	2006-01-03 12:21:10.000000000 +0900
+++ linux-2.6.15-lsf/include/asm-i386/types.h	2006-01-04 15:37:17.000000000 +0900
@@ -63,6 +63,11 @@ typedef u64 sector_t;
 #define HAVE_SECTOR_T
 #endif

+#ifdef CONFIG_LSF
+typedef u64 blkcnt_t;
+#define HAVE_BLKCNT_T
+#endif
+
 #endif /* __ASSEMBLY__ */

 #endif /* __KERNEL__ */
diff -uprN -X linux-2.6.15-iblocks/Documentation/dontdiff linux-2.6.15-iblocks/include/asm-mips/types.h
linux-2.6.15-lsf/include/asm-mips/types.h
--- linux-2.6.15-iblocks/include/asm-mips/types.h	2006-01-03 12:21:10.000000000 +0900
+++ linux-2.6.15-lsf/include/asm-mips/types.h	2006-01-04 15:37:17.000000000 +0900
@@ -99,6 +99,11 @@ typedef u64 sector_t;
 #define HAVE_SECTOR_T
 #endif

+#ifdef CONFIG_LSF
+typedef u64 blkcnt_t;
+#define HAVE_BLKCNT_T
+#endif
+
 #endif /* __ASSEMBLY__ */

 #endif /* __KERNEL__ */
diff -uprN -X linux-2.6.15-iblocks/Documentation/dontdiff linux-2.6.15-iblocks/include/asm-powerpc/types.h
linux-2.6.15-lsf/include/asm-powerpc/types.h
--- linux-2.6.15-iblocks/include/asm-powerpc/types.h	2006-01-03 12:21:10.000000000 +0900
+++ linux-2.6.15-lsf/include/asm-powerpc/types.h	2006-01-04 15:37:17.000000000 +0900
@@ -103,6 +103,11 @@ typedef u64 sector_t;
 #define HAVE_SECTOR_T
 #endif

+#ifdef CONFIG_LSF
+typedef u64 blkcnt_t;
+#define HAVE_BLKCNT_T
+#endif
+
 #endif /* __ASSEMBLY__ */

 #endif /* __KERNEL__ */
diff -uprN -X linux-2.6.15-iblocks/Documentation/dontdiff linux-2.6.15-iblocks/include/asm-s390/types.h
linux-2.6.15-lsf/include/asm-s390/types.h
--- linux-2.6.15-iblocks/include/asm-s390/types.h	2006-01-03 12:21:10.000000000 +0900
+++ linux-2.6.15-lsf/include/asm-s390/types.h	2006-01-04 15:37:17.000000000 +0900
@@ -93,6 +93,11 @@ typedef u64 sector_t;
 #define HAVE_SECTOR_T
 #endif

+#ifdef CONFIG_LSF
+typedef u64 blkcnt_t;
+#define HAVE_BLKCNT_T
+#endif
+
 #endif /* ! __s390x__   */
 #endif /* __ASSEMBLY__  */
 #endif /* __KERNEL__    */
diff -uprN -X linux-2.6.15-iblocks/Documentation/dontdiff linux-2.6.15-iblocks/include/asm-sh/types.h
linux-2.6.15-lsf/include/asm-sh/types.h
--- linux-2.6.15-iblocks/include/asm-sh/types.h	2006-01-03 12:21:10.000000000 +0900
+++ linux-2.6.15-lsf/include/asm-sh/types.h	2006-01-04 15:37:17.000000000 +0900
@@ -58,6 +58,11 @@ typedef u64 sector_t;
 #define HAVE_SECTOR_T
 #endif

+#ifdef CONFIG_LSF
+typedef u64 blkcnt_t;
+#define HAVE_BLKCNT_T
+#endif
+
 #endif /* __ASSEMBLY__ */

 #endif /* __KERNEL__ */
diff -uprN -X linux-2.6.15-iblocks/Documentation/dontdiff linux-2.6.15-iblocks/include/linux/fs.h
linux-2.6.15-lsf/include/linux/fs.h
--- linux-2.6.15-iblocks/include/linux/fs.h	2006-01-04 15:39:06.000000000 +0900
+++ linux-2.6.15-lsf/include/linux/fs.h	2006-01-04 15:37:17.000000000 +0900
@@ -450,7 +450,7 @@ struct inode {
 	unsigned int		i_blkbits;
 	unsigned long		i_blksize;
 	unsigned long		i_version;
-	sector_t		i_blocks;
+	blkcnt_t		i_blocks;
 	unsigned short          i_bytes;
 	spinlock_t		i_lock;	/* i_blocks, i_bytes, maybe i_size */
 	struct semaphore	i_sem;
diff -uprN -X linux-2.6.15-iblocks/Documentation/dontdiff linux-2.6.15-iblocks/include/linux/types.h
linux-2.6.15-lsf/include/linux/types.h
--- linux-2.6.15-iblocks/include/linux/types.h	2006-01-03 12:21:10.000000000 +0900
+++ linux-2.6.15-lsf/include/linux/types.h	2006-01-04 15:37:17.000000000 +0900
@@ -135,6 +135,10 @@ typedef		__s64		int64_t;
 typedef unsigned long sector_t;
 #endif

+#ifndef HAVE_BLKCNT_T
+typedef unsigned long blkcnt_t;
+#endif
+
 /*
  * The type of an index into the pagecache.  Use a #define so asm/types.h
  * can override it.

-- Takashi Sato


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