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authorLennart Poettering <lennart@poettering.net>2014-11-26 14:59:12 +0100
committerLennart Poettering <lennart@poettering.net>2014-11-26 14:59:12 +0100
commite12d81ae80214ef05ddedafd016bdd604ce17d12 (patch)
tree55d8b2a5dd356154b24ab8c8a5c5287196d5176a
parent8514b67754c5ff7fa628929b3d27131010c21842 (diff)
sd-bus: given that the kernel now passes the auxgroups list as 32bit array to us, no need to convert to uid_t manually
This way, we can save one allocation and avoid copying the array unnecesarily.
-rw-r--r--src/libsystemd/sd-bus/bus-control.c22
-rw-r--r--src/libsystemd/sd-bus/bus-creds.c3
-rw-r--r--src/libsystemd/sd-bus/bus-kernel.c17
3 files changed, 17 insertions, 25 deletions
diff --git a/src/libsystemd/sd-bus/bus-control.c b/src/libsystemd/sd-bus/bus-control.c
index 9cd5cd5fb6..758715d74e 100644
--- a/src/libsystemd/sd-bus/bus-control.c
+++ b/src/libsystemd/sd-bus/bus-control.c
@@ -402,6 +402,10 @@ static int bus_populate_creds_from_items(
uint64_t m;
int r;
+ assert(bus);
+ assert(info);
+ assert(c);
+
KDBUS_ITEM_FOREACH(item, info, items) {
switch (item->type) {
@@ -590,18 +594,18 @@ static int bus_populate_creds_from_items(
case KDBUS_ITEM_AUXGROUPS:
if (mask & SD_BUS_CREDS_SUPPLEMENTARY_GIDS) {
- size_t i, n;
- uid_t *u;
+ size_t n;
+ uid_t *g;
- n = (item->size - offsetof(struct kdbus_item, data64)) / sizeof(uint64_t);
- u = new(uid_t, n);
- if (!u)
- return -ENOMEM;
+ assert_cc(sizeof(gid_t) == sizeof(uint32_t));
- for (i = 0; i < n; i++)
- u[i] = (uid_t) item->data64[i];
+ n = (item->size - offsetof(struct kdbus_item, data32)) / sizeof(uint32_t);
+ g = newdup(gid_t, item->data32, n);
+ if (!g)
+ return -ENOMEM;
- c->supplementary_gids = u;
+ free(c->supplementary_gids);
+ c->supplementary_gids = g;
c->n_supplementary_gids = n;
c->mask |= SD_BUS_CREDS_SUPPLEMENTARY_GIDS;
diff --git a/src/libsystemd/sd-bus/bus-creds.c b/src/libsystemd/sd-bus/bus-creds.c
index 43315b5b50..8aa53362fb 100644
--- a/src/libsystemd/sd-bus/bus-creds.c
+++ b/src/libsystemd/sd-bus/bus-creds.c
@@ -53,8 +53,6 @@ void bus_creds_done(sd_bus_creds *c) {
strv_free(c->cmdline_array);
strv_free(c->well_known_names);
-
- free(c->supplementary_gids);
}
_public_ sd_bus_creds *sd_bus_creds_ref(sd_bus_creds *c) {
@@ -97,6 +95,7 @@ _public_ sd_bus_creds *sd_bus_creds_unref(sd_bus_creds *c) {
free(c->unique_name);
free(c->cgroup_root);
free(c->description);
+ free(c->supplementary_gids);
free(c);
}
} else {
diff --git a/src/libsystemd/sd-bus/bus-kernel.c b/src/libsystemd/sd-bus/bus-kernel.c
index 907c5c5cf6..2beaa892bc 100644
--- a/src/libsystemd/sd-bus/bus-kernel.c
+++ b/src/libsystemd/sd-bus/bus-kernel.c
@@ -677,21 +677,10 @@ static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k) {
case KDBUS_ITEM_AUXGROUPS:
if (bus->creds_mask & SD_BUS_CREDS_SUPPLEMENTARY_GIDS) {
- size_t i, n;
- uid_t *u;
- n = (d->size - offsetof(struct kdbus_item, data32)) / sizeof(uint32_t);
- u = new(uid_t, n);
- if (!u) {
- r = -ENOMEM;
- goto fail;
- }
-
- for (i = 0; i < n; i++)
- u[i] = (uid_t) d->data32[i];
-
- m->creds.supplementary_gids = u;
- m->creds.n_supplementary_gids = n;
+ assert_cc(sizeof(gid_t) == sizeof(uint32_t));
+ m->creds.n_supplementary_gids = (d->size - offsetof(struct kdbus_item, data32)) / sizeof(uint32_t);
+ m->creds.supplementary_gids = (gid_t*) d->data32;
m->creds.mask |= SD_BUS_CREDS_SUPPLEMENTARY_GIDS;
}