[PATCH] 2TB files: st_blocks is invalid when calling stat64
This patch series fixes the following problems on 32 bits architecture.
o stat64 returns the lower 32 bits of blocks, although userland st_blocks
has 64 bits, because i_blocks has only 32 bits. The ioctl with FIOQSIZE has
the same problem.
o As Dave Kleikamp said, making >2TB file on JFS results in writing an
invalid block number to disk inode. The cause is the same as above too.
o In generic quota code dquot_transfer(), the file usage is calculated from
i_blocks via inode_get_bytes(). If the file is over 2TB, the change of
usage is less than expected. The cause is the same as above too.
o As Trond Myklebust said, statfs64's entries related to blocks are invalid
on statfs64 for a network filesystem which has more than 2^32-1 blocks with
CONFIG_LBD disabled. [PATCH 3/3]
We made patches to fix problems that occur when handling a large filesystem
and a large file. It was discussed on the mails titled "stat64 for over 2TB
file returned invalid st_blocks".
Signed-off-by: Takashi Sato <sho@tnes.nec.co.jp>
Cc: Dave Kleikamp <shaggy@austin.ibm.com>
Cc: Jan Kara <jack@ucw.cz>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-i386/stat.h b/include/asm-i386/stat.h
index b464f80..67eae78 100644
--- a/include/asm-i386/stat.h
+++ b/include/asm-i386/stat.h
@@ -58,8 +58,7 @@
long long st_size;
unsigned long st_blksize;
- unsigned long st_blocks; /* Number 512-byte blocks allocated. */
- unsigned long __pad4; /* future possible st_blocks high bits */
+ unsigned long long st_blocks; /* Number 512-byte blocks allocated. */
unsigned long st_atime;
unsigned long st_atime_nsec;
diff --git a/include/asm-m68k/stat.h b/include/asm-m68k/stat.h
index c4c402a..dd38bc2 100644
--- a/include/asm-m68k/stat.h
+++ b/include/asm-m68k/stat.h
@@ -60,8 +60,7 @@
long long st_size;
unsigned long st_blksize;
- unsigned long __pad4; /* future possible st_blocks high bits */
- unsigned long st_blocks; /* Number 512-byte blocks allocated. */
+ unsigned long long st_blocks; /* Number 512-byte blocks allocated. */
unsigned long st_atime;
unsigned long st_atime_nsec;
diff --git a/include/asm-sh/stat.h b/include/asm-sh/stat.h
index 914e3fc..6c41a60 100644
--- a/include/asm-sh/stat.h
+++ b/include/asm-sh/stat.h
@@ -60,13 +60,7 @@
long long st_size;
unsigned long st_blksize;
-#if defined(__BIG_ENDIAN__)
- unsigned long __pad4; /* Future possible st_blocks hi bits */
- unsigned long st_blocks; /* Number 512-byte blocks allocated. */
-#else /* Must be little */
- unsigned long st_blocks; /* Number 512-byte blocks allocated. */
- unsigned long __pad4; /* Future possible st_blocks hi bits */
-#endif
+ unsigned long long st_blocks; /* Number 512-byte blocks allocated. */
unsigned long st_atime;
unsigned long st_atime_nsec;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index ab67181..64b0ca4 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -490,7 +490,7 @@
unsigned int i_blkbits;
unsigned long i_blksize;
unsigned long i_version;
- unsigned long i_blocks;
+ sector_t i_blocks;
unsigned short i_bytes;
spinlock_t i_lock; /* i_blocks, i_bytes, maybe i_size */
struct mutex i_mutex;
diff --git a/include/linux/stat.h b/include/linux/stat.h
index 8ff2a12..8669291 100644
--- a/include/linux/stat.h
+++ b/include/linux/stat.h
@@ -69,7 +69,7 @@
struct timespec mtime;
struct timespec ctime;
unsigned long blksize;
- unsigned long blocks;
+ unsigned long long blocks;
};
#endif