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authorJan Andres <jandres@gmx.net>2010-08-04 22:52:46 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2010-08-11 00:29:47 -0400
commit66a362a2aa8ffa72670259fa15e2a77a01cc2217 (patch)
treedc41e40bb9e0e8c9f1a5947c23670da9e8ba9b49
parent532490f0a5350fd92d838b7430a4c846bc8eac3f (diff)
downloadop-kernel-dev-66a362a2aa8ffa72670259fa15e2a77a01cc2217.zip
op-kernel-dev-66a362a2aa8ffa72670259fa15e2a77a01cc2217.tar.gz
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 <jandres@gmx.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/isofs/inode.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 6b4dcd4..5a44811 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
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