diff options
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.patch | 116 |
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; + } + |