afs: Fix large file support

[ Upstream commit b485275f1aca8a9da37fd35e4fad673935e827da ]

By default s_maxbytes is set to MAX_NON_LFS, which limits the usable
file size to 2GB, enforced by the vfs.

Commit b9b1f8d5930a ("AFS: write support fixes") added support for the
64-bit fetch and store server operations, but did not change this value.
As a result, attempts to write past the 2G mark result in EFBIG errors:

 $ dd if=/dev/zero of=foo bs=1M count=1 seek=2048
 dd: error writing 'foo': File too large

Set s_maxbytes to MAX_LFS_FILESIZE.

Fixes: b9b1f8d5930a ("AFS: write support fixes")
Signed-off-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/afs/super.c b/fs/afs/super.c
index 689173c0a682fd2861a6836bc097e49e15696abc..f8529ddbd587f8c330b42b83af14bff83f159469 100644 (file)
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -359,6 +359,7 @@ static int afs_fill_super(struct super_block *sb,
        /* fill in the superblock */
        sb->s_blocksize         = PAGE_SIZE;
        sb->s_blocksize_bits    = PAGE_SHIFT;
+       sb->s_maxbytes          = MAX_LFS_FILESIZE;
        sb->s_magic             = AFS_FS_MAGIC;
        sb->s_op                = &afs_super_ops;
        sb->s_xattr             = afs_xattr_handlers;