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[71.56.157.77]) by smtp.gmail.com with ESMTPSA id ik3-20020a170902ab0300b00170d34cf7f3sm9137783plb.257.2022.10.18.16.46.04 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Oct 2022 16:46:05 -0700 (PDT) From: Luiz Augusto von Dentz To: linux-bluetooth@vger.kernel.org Subject: [PATCH BlueZ v2 2/3] monitor/att: Detect cache changes Date: Tue, 18 Oct 2022 16:45:59 -0700 Message-Id: <20221018234600.3990980-2-luiz.dentz@gmail.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221018234600.3990980-1-luiz.dentz@gmail.com> References: <20221018234600.3990980-1-luiz.dentz@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org From: Luiz Augusto von Dentz This attempts to detect if the were any changes on cache files since they were last loaded and then attempt to reload them. --- monitor/att.c | 41 +++++++++++++++++++++++++++++------------ 1 file changed, 29 insertions(+), 12 deletions(-) diff --git a/monitor/att.c b/monitor/att.c index 491f196bf38d..7a4125567498 100644 --- a/monitor/att.c +++ b/monitor/att.c @@ -22,6 +22,7 @@ #include #include #include +#include #include @@ -2426,7 +2427,9 @@ struct att_read { struct att_conn_data { struct gatt_db *ldb; + struct timespec ldb_mtim; struct gatt_db *rdb; + struct timespec rdb_mtim; struct queue *reads; }; @@ -2440,6 +2443,28 @@ static void att_conn_data_free(void *data) free(att_data); } +static void gatt_load_db(struct gatt_db *db, const char *filename, + struct timespec *mtim) +{ + struct stat st; + + if (lstat(filename, &st)) + return; + + if (!gatt_db_isempty(db)) { + /* Check if file has been modified since last time */ + if (st.st_mtim.tv_sec == mtim->tv_sec && + st.st_mtim.tv_nsec == mtim->tv_nsec) + return; + /* Clear db before reloading */ + gatt_db_clear(db); + } + + *mtim = st.st_mtim; + + btd_settings_gatt_db_load(db, filename); +} + static void load_gatt_db(struct packet_conn_data *conn) { struct att_conn_data *data = conn->data; @@ -2455,22 +2480,14 @@ static void load_gatt_db(struct packet_conn_data *conn) conn->destroy = att_conn_data_free; } - if (!gatt_db_isempty(data->ldb) && !gatt_db_isempty(data->rdb)) - return; - ba2str((bdaddr_t *)conn->src, local); ba2str((bdaddr_t *)conn->dst, peer); - if (gatt_db_isempty(data->ldb)) { - create_filename(filename, PATH_MAX, "/%s/attributes", local); - btd_settings_gatt_db_load(data->ldb, filename); - } + create_filename(filename, PATH_MAX, "/%s/attributes", local); + gatt_load_db(data->ldb, filename, &data->ldb_mtim); - if (gatt_db_isempty(data->rdb)) { - create_filename(filename, PATH_MAX, "/%s/cache/%s", local, - peer); - btd_settings_gatt_db_load(data->rdb, filename); - } + create_filename(filename, PATH_MAX, "/%s/cache/%s", local, peer); + gatt_load_db(data->rdb, filename, &data->rdb_mtim); } static struct gatt_db_attribute *get_attribute(const struct l2cap_frame *frame,