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Commit 97a5c6b7 authored by Marc Dionne's avatar Marc Dionne Committed by Greg Kroah-Hartman
Browse files

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 b9b1f8d5 ("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: b9b1f8d5 ("AFS: write support fixes")
Signed-off-by: default avatarMarc Dionne <marc.dionne@auristor.com>
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 2d916a17

fs/afs/super.c

+1 −0
Original line number Diff line number Diff line
@@ -393,6 +393,7 @@ 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;

	if (!as->dyn_root)