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lockd: unlock lockd locks held for a certain filesystem

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Add /proc/fs/nfsd/unlock_filesystem, which allows e.g.:

shell> echo /mnt/sfs1 > /proc/fs/nfsd/unlock_filesystem

so that a filesystem can be unmounted before allowing a peer nfsd to
take over nfs service for the filesystem.

Signed-off-by: S. Wendy Cheng <wcheng@redhat.com>
Cc: Lon Hohberger  <lhh@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

 fs/lockd/svcsubs.c          |   66 +++++++++++++++++++++++++++++++++++++++-----
 fs/nfsd/nfsctl.c            |   65 +++++++++++++++++++++++++++++++++++++++++++
 include/linux/lockd/lockd.h |    7 ++++
 3 files changed, 131 insertions(+), 7 deletions(-)
This commit is contained in:
Wendy Cheng
2008-01-17 11:10:12 -05:00
committed by J. Bruce Fields
parent 4373ea84c8
commit 17efa372cf
3 changed files with 65 additions and 5 deletions
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1
include/linux/lockd/lockd.h
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@ -223,6 +223,7 @@ void nlmsvc_invalidate_all(void);
/*
* Cluster failover support
*/
int nlmsvc_unlock_all_by_sb(struct super_block *sb);
int nlmsvc_unlock_all_by_ip(__be32 server_addr);
static inline struct inode *nlmsvc_file_inode(struct nlm_file *file)