LU-5778 lod: Fix lod_qos_statfs_update()

When an OST is sick, or unactivate, lod cannot fetch its statfs
information. In lod_qos_statfs_update() this was preventing lod
to get information for other OST because refresh was stopped at
first error.
This patch fixes this behaviour.

Patch backported from master:
Lustre-change: http://review.whamcloud.com/12617
Lustre-commit: b50a6ccf9fe32c2fae1e6225f8e1a5b420b45d56

Signed-off-by: Aurelien Degremont <aurelien.degremont@cea.fr>
Change-Id: I26ea91e54275f9e1accf51b779edf1b6e6a796a0
Reviewed-on: http://review.whamcloud.com/12685
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>

diff --git a/lustre/lod/lod_qos.c b/lustre/lod/lod_qos.c
index e7b1de0..a90f70c 100644 (file)
--- a/lustre/lod/lod_qos.c
+++ b/lustre/lod/lod_qos.c
@@ -150,6 +150,7 @@ static int lod_statfs_and_check(const struct lu_env *env, struct lod_device *d,
 {
        struct lod_tgt_desc *ost;
        int                  rc;
+       ENTRY;
 
        LASSERT(d);
        ost = OST_TGT(d,index);
@@ -198,7 +199,7 @@ static void lod_qos_statfs_update(const struct lu_env *env,
 {
        struct obd_device *obd = lod2obd(lod);
        struct ost_pool   *osts = &(lod->lod_pool_info);
-       int                i, idx, rc = 0;
+       int                i, idx;
        __u64              max_age, avail;
        ENTRY;
 
@@ -210,15 +211,14 @@ static void lod_qos_statfs_update(const struct lu_env *env,
 
        down_write(&lod->lod_qos.lq_rw_sem);
        if (cfs_time_beforeq_64(max_age, obd->obd_osfs_age))
-               GOTO(out, rc = 0);
+               goto out;
 
        for (i = 0; i < osts->op_count; i++) {
                idx = osts->op_array[i];
                avail = OST_TGT(lod,idx)->ltd_statfs.os_bavail;
-               rc = lod_statfs_and_check(env, lod, idx,
-                                         &OST_TGT(lod,idx)->ltd_statfs);
-               if (rc)
-                       break;
+               if (lod_statfs_and_check(env, lod, idx,
+                                        &OST_TGT(lod, idx)->ltd_statfs))
+                       continue;
                if (OST_TGT(lod,idx)->ltd_statfs.os_bavail != avail)
                        /* recalculate weigths */
                        lod->lod_qos.lq_dirty = 1;