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net-snmp/SOURCES/net-snmp-5.8-dskTable-dynam...

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diff -ruNp a/agent/mibgroup/ucd-snmp/disk.c b/agent/mibgroup/ucd-snmp/disk.c
--- a/agent/mibgroup/ucd-snmp/disk.c 2020-06-10 09:29:35.867328760 +0200
+++ b/agent/mibgroup/ucd-snmp/disk.c 2020-06-10 09:44:13.053535421 +0200
@@ -153,9 +153,10 @@ static void disk_free_config(void)
static void disk_parse_config(const char *, char *);
static void disk_parse_config_all(const char *, char *);
#if HAVE_FSTAB_H || HAVE_GETMNTENT || HAVE_STATFS
-static void find_and_add_allDisks(int minpercent);
+static void refresh_disk_table(int addNewDisks, int minpercent);
static void add_device(char *path, char *device,
- int minspace, int minpercent, int override);
+ int minspace, int minpercent, int addNewDisks,
+ int override);
static void modify_disk_parameters(int index, int minspace,
int minpercent);
static int disk_exists(char *path);
@@ -167,6 +168,7 @@ struct diskpart {
char path[STRMAX];
int minimumspace;
int minpercent;
+ int alive;
};
#define MAX_INT_32 0x7fffffff
@@ -174,6 +176,7 @@ struct diskpart {
unsigned int numdisks;
int allDisksIncluded = 0;
+int allDisksMinPercent = 0;
unsigned int maxdisks = 0;
struct diskpart *disks;
@@ -238,6 +241,7 @@ init_disk(void)
disk_free_config,
"minpercent%");
allDisksIncluded = 0;
+ allDisksMinPercent = 0;
}
static void
@@ -253,6 +257,7 @@ disk_free_config(void)
disks[i].minpercent = -1;
}
allDisksIncluded = 0;
+ allDisksMinPercent = 0;
}
static void
@@ -313,7 +318,7 @@ disk_parse_config(const char *token, cha
* check if the disk already exists, if so then modify its
* parameters. if it does not exist then add it
*/
- add_device(path, find_device(path), minspace, minpercent, 1);
+ add_device(path, find_device(path), minspace, minpercent, 1, 1);
#endif /* HAVE_FSTAB_H || HAVE_GETMNTENT || HAVE_STATFS */
}
@@ -372,7 +377,7 @@ disk_parse_config_all(const char *token,
#if HAVE_FSTAB_H || HAVE_GETMNTENT || HAVE_STATFS
static void
-add_device(char *path, char *device, int minspace, int minpercent, int override)
+add_device(char *path, char *device, int minspace, int minpercent, int addNewDisks, int override)
{
int index;
@@ -402,10 +407,16 @@ add_device(char *path, char *device, int
}
index = disk_exists(path);
- if((index != -1) && (index < maxdisks) && (override==1)) {
- modify_disk_parameters(index, minspace, minpercent);
+ if((index != -1) && (index < maxdisks)) {
+ /* the path is already in the table */
+ disks[index].alive = 1;
+ /* -> update its device */
+ strlcpy(disks[index].device, device, sizeof(disks[index].device));
+ if (override == 1) {
+ modify_disk_parameters(index, minspace, minpercent);
+ }
}
- else if(index == -1){
+ else if(index == -1 && addNewDisks){
/* add if and only if the device was found */
if(device[0] != 0) {
/* The following buffers are cleared above, no need to add '\0' */
@@ -413,6 +424,7 @@ add_device(char *path, char *device, int
strlcpy(disks[numdisks].device, device, sizeof(disks[numdisks].device));
disks[numdisks].minimumspace = minspace;
disks[numdisks].minpercent = minpercent;
+ disks[numdisks].alive = 1;
numdisks++;
}
else {
@@ -420,6 +432,7 @@ add_device(char *path, char *device, int
disks[numdisks].minpercent = -1;
disks[numdisks].path[0] = 0;
disks[numdisks].device[0] = 0;
+ disks[numdisks].alive = 0;
}
}
}
@@ -444,7 +457,7 @@ int disk_exists(char *path)
}
static void
-find_and_add_allDisks(int minpercent)
+refresh_disk_table(int addNewDisks, int minpercent)
{
#if HAVE_GETMNTENT
#if HAVE_SYS_MNTTAB_H
@@ -480,7 +493,7 @@ find_and_add_allDisks(int minpercent)
return;
}
while (mntfp && NULL != (mntent = getmntent(mntfp))) {
- add_device(mntent->mnt_dir, mntent->mnt_fsname, -1, minpercent, 0);
+ add_device(mntent->mnt_dir, mntent->mnt_fsname, -1, minpercent, addNewDisks, 0);
dummy = 1;
}
if (mntfp)
@@ -497,7 +510,7 @@ find_and_add_allDisks(int minpercent)
return;
}
while ((i = getmntent(mntfp, &mnttab)) == 0) {
- add_device(mnttab.mnt_mountp, mnttab.mnt_special, -1, minpercent, 0);
+ add_device(mnttab.mnt_mountp, mnttab.mnt_special, -1, minpercent, addNewDisks, 0);
dummy = 1;
}
fclose(mntfp);
@@ -510,7 +523,7 @@ find_and_add_allDisks(int minpercent)
#elif HAVE_FSTAB_H
setfsent(); /* open /etc/fstab */
while((fstab1 = getfsent()) != NULL) {
- add_device(fstab1->fs_file, fstab1->fs_spec, -1, minpercent, 0);
+ add_device(fstab1->fs_file, fstab1->fs_spec, -1, minpercent, addNewDisks, 0);
dummy = 1;
}
endfsent(); /* close /etc/fstab */
@@ -521,7 +534,7 @@ find_and_add_allDisks(int minpercent)
mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
for (i = 0; i < mntsize; i++) {
if (strncmp(mntbuf[i].f_fstypename, "zfs", 3) == 0) {
- add_device(mntbuf[i].f_mntonname, mntbuf[i].f_mntfromname, -1, minpercent, 0);
+ add_device(mntbuf[i].f_mntonname, mntbuf[i].f_mntfromname, -1, minpercent, addNewDisks, 0);
}
}
}
@@ -537,7 +550,7 @@ find_and_add_allDisks(int minpercent)
* statfs we default to the root partition "/"
*/
if (statfs("/", &statf) == 0) {
- add_device("/", statf.f_mntfromname, -1, minpercent, 0);
+ add_device("/", statf.f_mntfromname, -1, minpercent, addNewDisks, 0);
}
#endif
else {
@@ -696,6 +709,10 @@ fill_dsk_entry(int disknum, struct dsk_e
#endif
#endif
+ if (disks[disknum].alive == 0){
+ return -1;
+ }
+
entry->dskPercentInode = -1;
#if defined(HAVE_STATVFS) || defined(HAVE_STATFS)
@@ -826,6 +843,13 @@ var_extensible_disk(struct variable *vp,
static long long_ret;
static char *errmsg;
+ int i;
+ for (i = 0; i < numdisks; i++){
+ disks[i].alive = 0;
+ }
+ /* dynamically add new disks + update alive flag */
+ refresh_disk_table(allDisksIncluded, allDisksMinPercent);
+
tryAgain:
if (header_simple_table
(vp, name, length, exact, var_len, write_method, numdisks))
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