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From: Jan Andres on 4 Aug 2010 17:00
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
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 <jandres(a)gmx.net>
--- linux-2.6.35-j7/fs/isofs/inode.c.orig 2010-08-02 00:11:14.000000000 +0200
+++ linux-2.6.35-j7/fs/isofs/inode.c 2010-08-04 22:49:02.000000000 +0200
@@ -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
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