Merging upstream version 1.13.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

5 files changed, 648 insertions, 40 deletions

diff --git a/collectors/proc.plugin/Makefile.in b/collectors/proc.plugin/Makefile.in
new file mode 100644
index 000000000..31d15d54f
--- /dev/null
+++ b/collectors/proc.plugin/Makefile.in
@@ -0,0 +1,466 @@
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diff --git a/collectors/proc.plugin/README.md b/collectors/proc.plugin/README.md
index b505bced2..c484b11d6 100644
--- a/collectors/proc.plugin/README.md
+++ b/collectors/proc.plugin/README.md
@@ -387,12 +387,12 @@ and metrics:
 
 ```
 [plugin:proc:/sys/class/power_supply]
-    # battery capacity = yes
-    # battery charge = no
-    # battery energy = no
-    # power supply voltage = no
-    # keep files open = auto
-    # directory to monitor = /sys/class/power_supply
+  # battery capacity = yes
+  # battery charge = no
+  # battery energy = no
+  # power supply voltage = no
+  # keep files open = auto
+  # directory to monitor = /sys/class/power_supply
 ```
 
 #### notes
@@ -413,16 +413,27 @@ This way, alerts which match on these will still work.
 
 ## IPC
 
-This module monitors the number of semaphores, semaphore arrays, number of messages in message queues, and amount of memory used by message queues. As far as the message queue charts are dynamic, sane limits are applied for the number of dimensions per chart (the limit is configurable).
+### Monitored IPC metrics
 
-#### configuration
+- **number of messages in message queues**
+- **amount of memory used by message queues**
+- **number of semaphores**
+- **number of semaphore arrays**
+- **number of shared memory segments**
+- **amount of memory used by shared memory segments**
+
+As far as the message queue charts are dynamic, sane limits are applied for the number of dimensions per chart (the limit is configurable).
+
+### configuration
 
 ```
 [plugin:proc:ipc]
-    # semaphore totals = yes
-    # message queues = yes
-    # msg filename to monitor = /proc/sysvipc/msg
-    # max dimensions in memory allowed = 50
+  # message queues = yes
+  # semaphore totals = yes
+  # shared memory totals = yes
+  # msg filename to monitor = /proc/sysvipc/msg
+  # shm filename to monitor = /proc/sysvipc/shm
+  # max dimensions in memory allowed = 50
 ```
 
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diff --git a/collectors/proc.plugin/ipc.c b/collectors/proc.plugin/ipc.c
index b16e8b7c8..048fe74a7 100644
--- a/collectors/proc.plugin/ipc.c
+++ b/collectors/proc.plugin/ipc.c
@@ -65,6 +65,11 @@ struct message_queue {
     struct message_queue * next;
 };
 
+struct shm_stats {
+    unsigned long long segments;
+    unsigned long long bytes;
+};
+
 static inline int ipc_sem_get_limits(struct ipc_limits *lim) {
     static procfile *ff = NULL;
     static int error_shown = 0;
@@ -179,7 +184,7 @@ int ipc_msq_get_info(char *msg_filename, struct message_queue **message_queue_ro
     struct message_queue *msq;
 
     if(unlikely(!ff)) {
-        ff = procfile_open(config_get("plugin:proc:ipc", "msg filename to monitor", msg_filename), " \t:", PROCFILE_FLAG_DEFAULT);
+        ff = procfile_open(msg_filename, " \t:", PROCFILE_FLAG_DEFAULT);
         if(unlikely(!ff)) return 1;
     }
 
@@ -230,10 +235,49 @@ int ipc_msq_get_info(char *msg_filename, struct message_queue **message_queue_ro
     return 0;
 }
 
+int ipc_shm_get_info(char *shm_filename, struct shm_stats *shm) {
+    static procfile *ff;
+
+    if(unlikely(!ff)) {
+        ff = procfile_open(shm_filename, " \t:", PROCFILE_FLAG_DEFAULT);
+        if(unlikely(!ff)) return 1;
+    }
+
+    ff = procfile_readall(ff);
+    if(unlikely(!ff)) return 1;
+
+    size_t lines = procfile_lines(ff);
+    size_t words = 0;
+
+    if(unlikely(lines < 2)) {
+        error("Cannot read %s. Expected 2 or more lines, read %zu.", ff->filename, lines);
+        return 1;
+    }
+
+    shm->segments = 0;
+    shm->bytes = 0;
+
+    // loop through all lines except the first and the last ones
+    size_t l;
+    for(l = 1; l < lines - 1; l++) {
+        words = procfile_linewords(ff, l);
+        if(unlikely(words < 2)) continue;
+        if(unlikely(words < 16)) {
+            error("Cannot read %s line. Expected 16 params, read %zu.", ff->filename, words);
+            continue;
+        }
+
+        shm->segments++;
+        shm->bytes += str2ull(procfile_lineword(ff, l, 3));
+    }
+
+    return 0;
+}
+
 int do_ipc(int update_every, usec_t dt) {
     (void)dt;
 
-    static int do_sem = -1, do_msg = -1;
+    static int do_sem = -1, do_msg = -1, do_shm = -1;
     static int read_limits_next = -1;
     static struct ipc_limits limits;
     static struct ipc_status status;
@@ -243,15 +287,21 @@ int do_ipc(int update_every, usec_t dt) {
     static char *msg_filename = NULL;
     static struct message_queue *message_queue_root = NULL;
     static long long dimensions_limit;
+    static char *shm_filename = NULL;
 
     if(unlikely(do_sem == -1)) {
-        do_sem = config_get_boolean("plugin:proc:ipc", "semaphore totals", CONFIG_BOOLEAN_YES);
         do_msg = config_get_boolean("plugin:proc:ipc", "message queues", CONFIG_BOOLEAN_YES);
+        do_sem = config_get_boolean("plugin:proc:ipc", "semaphore totals", CONFIG_BOOLEAN_YES);
+        do_shm = config_get_boolean("plugin:proc:ipc", "shared memory totals", CONFIG_BOOLEAN_YES);
 
         char filename[FILENAME_MAX + 1];
+
         snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/sysvipc/msg");
         msg_filename = config_get("plugin:proc:ipc", "msg filename to monitor", filename);
 
+        snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/sysvipc/shm");
+        shm_filename = config_get("plugin:proc:ipc", "shm filename to monitor", filename);
+
         dimensions_limit = config_get_number("plugin:proc:ipc", "max dimensions in memory allowed", 50);
 
         // make sure it works
@@ -460,5 +510,67 @@ int do_ipc(int update_every, usec_t dt) {
         }
     }
 
+    // --------------------------------------------------------------------
+
+    if(likely(do_shm != CONFIG_BOOLEAN_NO)) {
+        static RRDSET *st_shm_segments = NULL, *st_shm_bytes = NULL;
+        static RRDDIM *rd_shm_segments = NULL, *rd_shm_bytes = NULL;
+        struct shm_stats shm;
+
+        if(!ipc_shm_get_info(shm_filename, &shm)) {
+            if(unlikely(!st_shm_segments)) {
+                st_shm_segments = rrdset_create_localhost(
+                        "system"
+                        , "shared_memory_segments"
+                        , NULL
+                        , "ipc shared memory"
+                        , NULL
+                        , "IPC Shared Memory Number of Segments"
+                        , "segments"
+                        , PLUGIN_PROC_NAME
+                        , "ipc"
+                        , NETDATA_CHART_PRIO_SYSTEM_IPC_SHARED_MEM_SEGS
+                        , update_every
+                        , RRDSET_TYPE_STACKED
+                );
+
+                rd_shm_segments = rrddim_add(st_shm_segments, "segments", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
+            }
+            else
+                rrdset_next(st_shm_segments);
+
+            rrddim_set_by_pointer(st_shm_segments, rd_shm_segments, shm.segments);
+
+            rrdset_done(st_shm_segments);
+
+            // --------------------------------------------------------------------
+
+            if(unlikely(!st_shm_bytes)) {
+                st_shm_bytes = rrdset_create_localhost(
+                        "system"
+                        , "shared_memory_bytes"
+                        , NULL
+                        , "ipc shared memory"
+                        , NULL
+                        , "IPC Shared Memory Used Bytes"
+                        , "bytes"
+                        , PLUGIN_PROC_NAME
+                        , "ipc"
+                        , NETDATA_CHART_PRIO_SYSTEM_IPC_SHARED_MEM_SIZE
+                        , update_every
+                        , RRDSET_TYPE_STACKED
+                );
+
+                rd_shm_bytes = rrddim_add(st_shm_bytes, "bytes", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
+            }
+            else
+                rrdset_next(st_shm_bytes);
+
+            rrddim_set_by_pointer(st_shm_bytes, rd_shm_bytes, shm.bytes);
+
+            rrdset_done(st_shm_bytes);
+        }
+    }
+
     return 0;
 }
diff --git a/collectors/proc.plugin/proc_stat.c b/collectors/proc.plugin/proc_stat.c
index ad893456b..f98b09561 100644
--- a/collectors/proc.plugin/proc_stat.c
+++ b/collectors/proc.plugin/proc_stat.c
@@ -404,8 +404,8 @@ static int read_cpuidle_states(char *cpuidle_name_filename , char *cpuidle_time_
         }
         snprintfz(next_state_filename, FILENAME_MAX, cpuidle_name_filename, core, cc->cpuidle_state_len);
 
-        cc->cpuidle_state = callocz(cc->cpuidle_state_len, sizeof(struct cpuidle_state));
-        memset(cc->cpuidle_state, 0, sizeof(struct cpuidle_state) * cc->cpuidle_state_len);
+        if(likely(cc->cpuidle_state_len))
+            cc->cpuidle_state = callocz(cc->cpuidle_state_len, sizeof(struct cpuidle_state));
 
         for(state = 0; state < cc->cpuidle_state_len; state++) {
             char name_buf[50 + 1];
diff --git a/collectors/proc.plugin/sys_class_power_supply.c b/collectors/proc.plugin/sys_class_power_supply.c
index 09cdc7c0d..5e37ad5ab 100644
--- a/collectors/proc.plugin/sys_class_power_supply.c
+++ b/collectors/proc.plugin/sys_class_power_supply.c
@@ -19,6 +19,7 @@ struct ps_property_dim {
 
     RRDDIM *rd;
     unsigned long long value;
+    int always_zero;
 
     struct ps_property_dim *next;
 };
@@ -184,6 +185,7 @@ int do_sys_class_power_supply(int update_every, usec_t dt) {
                 for(pr_idx = 0; pr_idx < 3; pr_idx++) {
                     if(unlikely(do_property[pr_idx] != CONFIG_BOOLEAN_NO)) {
                         struct ps_property *pr = NULL;
+                        int min_value_found = 0, max_value_found = 0;
 
                         for(pd_idx = pr_idx * 5; pd_idx < pr_idx * 5 + 5; pd_idx++) {
 
@@ -193,6 +195,11 @@ int do_sys_class_power_supply(int update_every, usec_t dt) {
                                       ps_property_names[pr_idx], ps_property_dim_names[pd_idx]);
                             if (stat(filename, &stbuf) == 0) {
 
+                                if(unlikely(pd_idx == pr_idx * 5 + 1))
+                                    min_value_found = 1;
+                                if(unlikely(pd_idx == pr_idx * 5 + 3))
+                                    max_value_found = 1;
+
                                 // add chart
                                 if(unlikely(prev_idx != pr_idx)) {
                                     pr = callocz(sizeof(struct ps_property), 1);
@@ -215,6 +222,16 @@ int do_sys_class_power_supply(int update_every, usec_t dt) {
                                 pr->property_dim_root = pd;
                             }
                         }
+
+                        // create a zero empty/min dimension
+                        if(unlikely(max_value_found && !min_value_found)) {
+                            struct ps_property_dim *pd;
+                            pd= callocz(sizeof(struct ps_property_dim), 1);
+                            pd->name = strdupz(ps_property_dim_names[pr_idx * 5 + 1]);
+                            pd->always_zero = 1;
+                            pd->next = pr->property_dim_root;
+                            pr->property_dim_root = pd;
+                        }
                     }
                 }
             }
@@ -258,36 +275,38 @@ int do_sys_class_power_supply(int update_every, usec_t dt) {
             for(pr = ps->property_root; pr && !read_error; pr = pr->next) {
                 struct ps_property_dim *pd;
                 for(pd = pr->property_dim_root; pd; pd = pd->next) {
-                    char buffer[30 + 1];
+                    if(likely(!pd->always_zero)) {
+                        char buffer[30 + 1];
 
-                    if(unlikely(pd->fd == -1)) {
-                        pd->fd = open(pd->filename, O_RDONLY, 0666);
                         if(unlikely(pd->fd == -1)) {
-                            error("Cannot open file '%s'", pd->filename);
+                            pd->fd = open(pd->filename, O_RDONLY, 0666);
+                            if(unlikely(pd->fd == -1)) {
+                                error("Cannot open file '%s'", pd->filename);
+                                read_error = 1;
+                                power_supply_free(ps);
+                                break;
+                            }
+                        }
+
+                        ssize_t r = read(pd->fd, buffer, 30);
+                        if(unlikely(r < 1)) {
+                            error("Cannot read file '%s'", pd->filename);
                             read_error = 1;
                             power_supply_free(ps);
                             break;
                         }
-                    }
+                        buffer[r] = '\0';
+                        pd->value = str2ull(buffer);
 
-                    ssize_t r = read(pd->fd, buffer, 30);
-                    if(unlikely(r < 1)) {
-                        error("Cannot read file '%s'", pd->filename);
-                        read_error = 1;
-                        power_supply_free(ps);
-                        break;
-                    }
-                    buffer[r] = '\0';
-                    pd->value = str2ull(buffer);
-
-                    if(unlikely(!keep_fds_open)) {
-                        close(pd->fd);
-                        pd->fd = -1;
-                    }
-                    else if(unlikely(lseek(pd->fd, 0, SEEK_SET) == -1)) {
-                        error("Cannot seek in file '%s'", pd->filename);
-                        close(pd->fd);
-                        pd->fd = -1;
+                        if(unlikely(!keep_fds_open)) {
+                            close(pd->fd);
+                            pd->fd = -1;
+                        }
+                        else if(unlikely(lseek(pd->fd, 0, SEEK_SET) == -1)) {
+                            error("Cannot seek in file '%s'", pd->filename);
+                            close(pd->fd);
+                            pd->fd = -1;
+                        }
                     }
                 }
             }