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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-30 03:16:03 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-30 03:16:03 +0000
commit85b9dace1a9f0c37dfe8089364a03db541a90c7f (patch)
tree6cb322e8d36dd8efe5bd45612a4beb5b693f24ce /debian/patches/upstream-master/libuuid-split-uuidd-cache-into-dedicated-struct.patch
parentAdding debian version 2.40.1-1. (diff)
downloadutil-linux-85b9dace1a9f0c37dfe8089364a03db541a90c7f.tar.xz
util-linux-85b9dace1a9f0c37dfe8089364a03db541a90c7f.zip
Adding debian version 2.40.1-2.debian/2.40.1-2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'debian/patches/upstream-master/libuuid-split-uuidd-cache-into-dedicated-struct.patch')
-rw-r--r--debian/patches/upstream-master/libuuid-split-uuidd-cache-into-dedicated-struct.patch116
1 files changed, 116 insertions, 0 deletions
diff --git a/debian/patches/upstream-master/libuuid-split-uuidd-cache-into-dedicated-struct.patch b/debian/patches/upstream-master/libuuid-split-uuidd-cache-into-dedicated-struct.patch
new file mode 100644
index 0000000..86fe71c
--- /dev/null
+++ b/debian/patches/upstream-master/libuuid-split-uuidd-cache-into-dedicated-struct.patch
@@ -0,0 +1,116 @@
+From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= <thomas@t-8ch.de>
+Date: Tue, 7 May 2024 13:33:40 +0200
+Subject: libuuid: split uuidd cache into dedicated struct
+MIME-Version: 1.0
+Content-Type: text/plain; charset="utf-8"
+Content-Transfer-Encoding: 8bit
+
+To clear the struct we need to be able to refer to it by name.
+
+Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
+---
+ libuuid/src/gen_uuid.c | 74 +++++++++++++++++++++++++++-----------------------
+ 1 file changed, 40 insertions(+), 34 deletions(-)
+
+diff --git a/libuuid/src/gen_uuid.c b/libuuid/src/gen_uuid.c
+index 0984e24..c40f9d6 100644
+--- a/libuuid/src/gen_uuid.c
++++ b/libuuid/src/gen_uuid.c
+@@ -579,57 +579,63 @@ int __uuid_generate_time_cont(uuid_t out, int *num, uint32_t cont_offset)
+ * If neither of these is possible (e.g. because of insufficient permissions), it generates
+ * the UUID anyway, but returns -1. Otherwise, returns 0.
+ */
++
++/* thread local cache for uuidd based requests */
++THREAD_LOCAL struct {
++ int num;
++ int cache_size;
++ int last_used;
++ struct uuid uu;
++ time_t last_time;
++} uuidd_cache = {
++ .cache_size = CS_MIN,
++};
++
+ static int uuid_generate_time_generic(uuid_t out) {
+- /* thread local cache for uuidd based requests */
+- THREAD_LOCAL int num = 0;
+- THREAD_LOCAL int cache_size = CS_MIN;
+- THREAD_LOCAL int last_used = 0;
+- THREAD_LOCAL struct uuid uu;
+- THREAD_LOCAL time_t last_time = 0;
+- time_t now;
+-
+- if (num > 0) { /* expire cache */
++ time_t now;
++
++ if (uuidd_cache.num > 0) { /* expire cache */
+ now = time(NULL);
+- if (now > last_time+1) {
+- last_used = cache_size - num;
+- num = 0;
++ if (now > uuidd_cache.last_time+1) {
++ uuidd_cache.last_used = uuidd_cache.cache_size - uuidd_cache.num;
++ uuidd_cache.num = 0;
+ }
+ }
+- if (num <= 0) { /* fill cache */
++ if (uuidd_cache.num <= 0) { /* fill cache */
+ /*
+ * num + OP_BULK provides a local cache in each application.
+ * Start with a small cache size to cover short running applications
+ * and adjust the cache size over the runntime.
+ */
+- if ((last_used == cache_size) && (cache_size < CS_MAX))
+- cache_size *= CS_FACTOR;
+- else if ((last_used < (cache_size / CS_FACTOR)) && (cache_size > CS_MIN))
+- cache_size /= CS_FACTOR;
++ if ((uuidd_cache.last_used == uuidd_cache.cache_size) && (uuidd_cache.cache_size < CS_MAX))
++ uuidd_cache.cache_size *= CS_FACTOR;
++ else if ((uuidd_cache.last_used < (uuidd_cache.cache_size / CS_FACTOR)) && (uuidd_cache.cache_size > CS_MIN))
++ uuidd_cache.cache_size /= CS_FACTOR;
+
+- num = cache_size;
++ uuidd_cache.num = uuidd_cache.cache_size;
+
+ if (get_uuid_via_daemon(UUIDD_OP_BULK_TIME_UUID,
+- out, &num) == 0) {
+- last_time = time(NULL);
+- uuid_unpack(out, &uu);
+- num--;
++ out, &uuidd_cache.num) == 0) {
++ uuidd_cache.last_time = time(NULL);
++ uuid_unpack(out, &uuidd_cache.uu);
++ uuidd_cache.num--;
+ return 0;
+ }
+ /* request to daemon failed, reset cache */
+- num = 0;
+- cache_size = CS_MIN;
++ uuidd_cache.num = 0;
++ uuidd_cache.cache_size = CS_MIN;
+ }
+- if (num > 0) { /* serve uuid from cache */
+- uu.time_low++;
+- if (uu.time_low == 0) {
+- uu.time_mid++;
+- if (uu.time_mid == 0)
+- uu.time_hi_and_version++;
++ if (uuidd_cache.num > 0) { /* serve uuid from cache */
++ uuidd_cache.uu.time_low++;
++ if (uuidd_cache.uu.time_low == 0) {
++ uuidd_cache.uu.time_mid++;
++ if (uuidd_cache.uu.time_mid == 0)
++ uuidd_cache.uu.time_hi_and_version++;
+ }
+- num--;
+- uuid_pack(&uu, out);
+- if (num == 0)
+- last_used = cache_size;
++ uuidd_cache.num--;
++ uuid_pack(&uuidd_cache.uu, out);
++ if (uuidd_cache.num == 0)
++ uuidd_cache.last_used = uuidd_cache.cache_size;
+ return 0;
+ }
+