From 66a362a2aa8ffa72670259fa15e2a77a01cc2217 Mon Sep 17 00:00:00 2001 From: Jan Andres Date: Wed, 4 Aug 2010 22:52:46 +0200 Subject: isofs: Fix lseek() to position beyond 4 GB isofs supports files larger than 4 GB by using multi-extent files. However an lseek() to a position beyond 4 GB in such a file will fail with EINVAL, because s_maxbytes in the isofs superblock is initialized to 2^32-1, and generic_file_llseek() checks against that value. I therefore suggest increasing the value of s_maxbytes to have full support for large files in isofs. With multi-extent files, file size is only limited by the maximum size of the file system (8 TB), so this seems a reasonable value for s_maxbytes. Signed-off-by: Jan Andres Signed-off-by: Al Viro --- fs/isofs/inode.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c index 6b4dcd4f2943..5a44811b5027 100644 --- a/fs/isofs/inode.c +++ b/fs/isofs/inode.c @@ -722,7 +722,12 @@ root_found: } s->s_magic = ISOFS_SUPER_MAGIC; - s->s_maxbytes = 0xffffffff; /* We can handle files up to 4 GB */ + + /* + * With multi-extent files, file size is only limited by the maximum + * size of a file system, which is 8 TB. + */ + s->s_maxbytes = 0x80000000000LL; /* * The CDROM is read-only, has no nodes (devices) on it, and since -- cgit v1.2.2