diff options
| author | NeilBrown <neilb@suse.de> | 2007-02-07 11:10:26 +1100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-03-09 10:50:18 -0800 |
| commit | b3725e12ab2cf9e0f1254506baef3f9206520d3e (patch) | |
| tree | a6017d4ff34399b4e77d3ff3ad9cb8a0a79aaf81 /include | |
| parent | e3844c2df6b122e494e77ab507ae96553160c006 (diff) | |
knfsd: Fix a race in closing NFSd connections.
If you lose this race, it can iput a socket inode twice and you
get a BUG in fs/inode.c
When I added the option for user-space to close a socket,
I added some cruft to svc_delete_socket so that I could call
that function when closing a socket per user-space request.
This was the wrong thing to do. I should have just set SK_CLOSE
and let normal mechanisms do the work.
Not only wrong, but buggy. The locking is all wrong and it openned
up a race where-by a socket could be closed twice.
So this patch:
Introduces svc_close_socket which sets SK_CLOSE then either leave
the close up to a thread, or calls svc_delete_socket if it can
get SK_BUSY.
Adds a bias to sk_busy which is removed when SK_DEAD is set,
This avoid races around shutting down the socket.
Changes several 'spin_lock' to 'spin_lock_bh' where the _bh
was missing.
Bugzilla-url: http://bugzilla.kernel.org/show_bug.cgi?id=7916
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sunrpc/svcsock.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/sunrpc/svcsock.h b/include/linux/sunrpc/svcsock.h index 98b21ad370f..db312a1e2ee 100644 --- a/include/linux/sunrpc/svcsock.h +++ b/include/linux/sunrpc/svcsock.h @@ -63,7 +63,7 @@ struct svc_sock { * Function prototypes. */ int svc_makesock(struct svc_serv *, int, unsigned short); -void svc_delete_socket(struct svc_sock *); +void svc_close_socket(struct svc_sock *); int svc_recv(struct svc_rqst *, long); int svc_send(struct svc_rqst *); void svc_drop(struct svc_rqst *); |