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author | Jeff Layton <jlayton@redhat.com> | 2014-01-04 12:18:03 (GMT) |
---|---|---|
committer | J. Bruce Fields <bfields@redhat.com> | 2014-01-06 20:14:16 (GMT) |
commit | 1654a04cd702fd19c297c36300a6ab834cf8c072 (patch) | |
tree | d8d4a040c6614baa92b735a6b96dce962541cae7 /net/sunrpc/auth_gss/svcauth_gss.c | |
parent | 73ca65904c5abaa29b8d9699089292239564300f (diff) | |
download | linux-1654a04cd702fd19c297c36300a6ab834cf8c072.tar.xz |
sunrpc: don't wait for write before allowing reads from use-gss-proxy file
It doesn't make much sense to make reads from this procfile hang. As
far as I can tell, only gssproxy itself will open this file and it
never reads from it. Change it to just give the present setting of
sn->use_gss_proxy without waiting for anything.
Note that we do not want to call use_gss_proxy() in this codepath
since an inopportune read of this file could cause it to be disabled
prematurely.
Cc: stable@vger.kernel.org
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net/sunrpc/auth_gss/svcauth_gss.c')
-rw-r--r-- | net/sunrpc/auth_gss/svcauth_gss.c | 33 |
1 files changed, 2 insertions, 31 deletions
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c index 008cdad..1b94a9c 100644 --- a/net/sunrpc/auth_gss/svcauth_gss.c +++ b/net/sunrpc/auth_gss/svcauth_gss.c @@ -1295,34 +1295,9 @@ static int set_gss_proxy(struct net *net, int type) else ret = -EBUSY; spin_unlock(&use_gssp_lock); - wake_up(&sn->gssp_wq); return ret; } -static inline bool gssp_ready(struct sunrpc_net *sn) -{ - switch (sn->use_gss_proxy) { - case -1: - return false; - case 0: - return true; - case 1: - return sn->gssp_clnt; - } - WARN_ON_ONCE(1); - return false; -} - -static int wait_for_gss_proxy(struct net *net, struct file *file) -{ - struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); - - if (file->f_flags & O_NONBLOCK && !gssp_ready(sn)) - return -EAGAIN; - return wait_event_interruptible(sn->gssp_wq, gssp_ready(sn)); -} - - static ssize_t write_gssp(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { @@ -1355,16 +1330,12 @@ static ssize_t read_gssp(struct file *file, char __user *buf, size_t count, loff_t *ppos) { struct net *net = PDE_DATA(file_inode(file)); + struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); unsigned long p = *ppos; char tbuf[10]; size_t len; - int ret; - - ret = wait_for_gss_proxy(net, file); - if (ret) - return ret; - snprintf(tbuf, sizeof(tbuf), "%d\n", use_gss_proxy(net)); + snprintf(tbuf, sizeof(tbuf), "%d\n", sn->use_gss_proxy); len = strlen(tbuf); if (p >= len) return 0; |