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authorVladimir Davydov <vdavydov@parallels.com>2015-04-15 01:46:39 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-15 02:49:03 +0300
commit58be19dcf7c0c206e60796c2ee18fc4fc1659fea (patch)
treed60ef840cacb476a104820fea3baff0ff5133a59 /fs/ocfs2
parent93e478d4c36ecaf15b942988b8272102d661d44e (diff)
downloadlinux-58be19dcf7c0c206e60796c2ee18fc4fc1659fea.tar.xz
ocfs2: copy fs uuid to superblock
Currently, maximal number of cleancache enabled filesystems equals 32, which is insufficient nowadays, because a Linux host can have hundreds of containers on board, each of which might want its own filesystem. This patch set targets at removing this limitation - see patch 4 for more details. Patches 1-3 prepare the code for this change. This patch (of 4): This will allow us to remove the uuid argument from cleancache_init_shared_fs. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: David Vrabel <david.vrabel@citrix.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Stefan Hengelein <ilendir@googlemail.com> Cc: Florian Schmaus <fschmaus@gmail.com> Cc: Andor Daam <andor.daam@googlemail.com> Cc: Dan Magenheimer <dan.magenheimer@oracle.com> Cc: Bob Liu <lliubbo@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2')
-rw-r--r--fs/ocfs2/super.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index c558bff99165..a811a95cfd5f 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -2070,6 +2070,8 @@ static int ocfs2_initialize_super(struct super_block *sb,
cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
+ memcpy(sb->s_uuid, di->id2.i_super.s_uuid,
+ sizeof(di->id2.i_super.s_uuid));
osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;