[systemd-devel] [PATCH 1/3] blkio bandwidth: don't clean up all of entries in blockio_device_bandwidths list

[Gao feng]

if we get BlockIOReadBandwidth="", we should only remove the
read-bandwidth-entries in blockio_device_bandwidths list.
---
 src/core/load-fragment.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index 4714687..6f316cc 100644
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -2205,6 +2205,7 @@ int config_parse_blockio_bandwidth(
         CGroupContext *c = data;
         const char *bandwidth;
         off_t bytes;
+        bool read;
         size_t n;
         int r;
 
@@ -2212,9 +2213,18 @@ int config_parse_blockio_bandwidth(
         assert(lvalue);
         assert(rvalue);
 
+        read = streq("BlockIOReadBandwidth", lvalue);
+
         if (isempty(rvalue)) {
-                while (c->blockio_device_bandwidths)
-                        cgroup_context_free_blockio_device_bandwidth(c, c->blockio_device_bandwidths);
+                CGroupBlockIODeviceBandwidth *next;
+
+                LIST_FOREACH_SAFE (device_bandwidths, b, next, c->blockio_device_bandwidths) {
+                        if (b->read == read) {
+                                LIST_REMOVE(CGroupBlockIODeviceBandwidth, device_bandwidths, c->blockio_device_bandwidths, b);
+                                free(b->path);
+                                free(b);
+                        }
+                }
 
                 return 0;
         }
@@ -2253,7 +2263,7 @@ int config_parse_blockio_bandwidth(
         b->path = path;
         path = NULL;
         b->bandwidth = (uint64_t) bytes;
-        b->read = streq("BlockIOReadBandwidth", lvalue);
+        b->read = read;
 
         LIST_PREPEND(CGroupBlockIODeviceBandwidth, device_bandwidths, c->blockio_device_bandwidths, b);
 
-- 
1.8.3.1