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NFSD: move lockd_up() before svc_addsock() 

Clean up.

A couple of years ago, a series of commits, finishing with commit
5680c446, swapped the order of the lockd_up() and svc_addsock() calls
in __write_ports().  At that time lockd_up() needed to know the
transport protocol of the passed-in socket to start a listener on the
same transport protocol.

These days, lockd_up() doesn't take a protocol argument; it always
starts both a UDP and TCP listener.  It's now more straightforward to
try the lockd_up() first, then do a lockd_down() if the svc_addsock()
fails.

Careful review of this code shows that the svc_sock_names() call is
used only to close the just-opened socket in case lockd_up() fails.
So it is no longer needed if lockd_up() is done first.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Chuck Lever 2009-04-23 19:32:18 -04:00 committed by J. Bruce Fields
parent 0a5372d8a1
commit ea068bad27
1 changed files with 10 additions and 9 deletions
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19
fs/nfsd/nfsctl.c
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@ -939,17 +939,18 @@ static ssize_t __write_ports_addfd(char *buf)
if (err != 0)
return err;
err = lockd_up();
if (err != 0)
goto out;
err = svc_addsock(nfsd_serv, fd, buf);
if (err >= 0) {
err = lockd_up();
if (err < 0)
svc_sock_names(buf + strlen(buf) + 1, nfsd_serv, buf);
if (err < 0)
lockd_down();
/* Decrease the count, but don't shut down the service */
nfsd_serv->sv_nrthreads--;
}
return err < 0 ? err : 0;
out:
/* Decrease the count, but don't shut down the service */
nfsd_serv->sv_nrthreads--;
return err;
}
/*