diff options
| author |   Philipp Reisner <philipp.reisner@linbit.com> | 2011-04-19 17:10:19 +0200 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2012-11-08 16:48:59 +0100 |
| commit | 44ed167da74825bfb7950d45a4f83bce3e84921c (patch) | |
| tree | 5d62fe65143717ff11af26138726540b35953c89 /drivers/block/drbd/drbd_proc.c | |
| parent | drbd: Allow online change of replication protocol only with agreed_pv >= 100 (diff) | |
| download | linux-dev-44ed167da74825bfb7950d45a4f83bce3e84921c.tar.xz linux-dev-44ed167da74825bfb7950d45a4f83bce3e84921c.zip | |
drbd: rcu_read_lock() and rcu_dereference() for tconn->net_conf
Removing the get_net_conf()/put_net_conf() calls
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block/drbd/drbd_proc.c')
| -rw-r--r-- | drivers/block/drbd/drbd_proc.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/block/drbd/drbd_proc.c b/drivers/block/drbd/drbd_proc.c index 4025d0883bad..792a71ec2e69 100644 --- a/drivers/block/drbd/drbd_proc.c +++ b/drivers/block/drbd/drbd_proc.c @@ -197,6 +197,8 @@ static int drbd_seq_show(struct seq_file *seq, void *v) int i, prev_i = -1; const char *sn; struct drbd_conf *mdev; + struct net_conf *nc; + char wp; static char write_ordering_chars[] = { [WO_none] = 'n', @@ -240,6 +242,10 @@ static int drbd_seq_show(struct seq_file *seq, void *v) mdev->state.role == R_SECONDARY) { seq_printf(seq, "%2d: cs:Unconfigured\n", i); } else { + rcu_read_lock(); + nc = rcu_dereference(mdev->tconn->net_conf); + wp = nc ? nc->wire_protocol - DRBD_PROT_A + 'A' : ' '; + rcu_read_unlock(); seq_printf(seq, "%2d: cs:%s ro:%s/%s ds:%s/%s %c %c%c%c%c%c%c\n" " ns:%u nr:%u dw:%u dr:%u al:%u bm:%u " @@ -249,8 +255,7 @@ static int drbd_seq_show(struct seq_file *seq, void *v) drbd_role_str(mdev->state.peer), drbd_disk_str(mdev->state.disk), drbd_disk_str(mdev->state.pdsk), - (mdev->tconn->net_conf == NULL ? ' ' : - (mdev->tconn->net_conf->wire_protocol - DRBD_PROT_A+'A')), + wp, drbd_suspended(mdev) ? 's' : 'r', mdev->state.aftr_isp ? 'a' : '-', mdev->state.peer_isp ? 'p' : '-', |