From: Eric Munson <emun...@bert.localdomain>
This patch adds the ability to list active hugetlbfs mount points to hugeadm.
Mount points are printed with their mount options (anything that was
specified with -o) so mount points for page different page sizes can be
easily identified.
Signed-off-by: Eric B Munson <ebmun...@us.ibm.com>
---
hugeadm.c | 32 ++++++++++++++++++++++++++++++++
1 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/hugeadm.c b/hugeadm.c
index a023786..5e93fab 100644
--- a/hugeadm.c
+++ b/hugeadm.c
@@ -28,6 +28,7 @@
#include <errno.h>
#include <string.h>
#include <limits.h>
+#include <mntent.h>
#define _GNU_SOURCE /* for getopt_long */
#include <unistd.h>
@@ -43,11 +44,15 @@ extern char *optarg;
#define OPTION(opts, text) fprintf(stderr, " %-25s %s\n", opts, text)
#define CONT(text) fprintf(stderr, " %-25s %s\n", "", text)
+#define MTAB "/etc/mtab"
+#define FS_NAME "hugetlbfs"
+
void print_usage()
{
fprintf(stderr, "hugeadm [options]\n");
fprintf(stderr, "options:\n");
+ OPTION("--mounts-list", "List all cuurent hugetlbfs mount points");
OPTION("--pool-list", "List all pools");
OPTION("--pool-pages-min <size>:[+|-]<count>", "");
CONT("Adjust pool 'size' lower bound");
@@ -67,6 +72,7 @@ int opt_dry_run = 0;
* getopts return values for options which are long only.
*/
#define LONG_POOL ('p' << 8)
+#define LONG_MOUNT_LIST (LONG_POOL|'S')
#define LONG_POOL_LIST (LONG_POOL|'l')
#define LONG_POOL_MIN_ADJ (LONG_POOL|'m')
#define LONG_POOL_MAX_ADJ (LONG_POOL|'M')
@@ -105,6 +111,26 @@ void pool_list(void)
}
}
+void mount_list(void)
+{
+ FILE *mtab;
+ struct mntent *ent;
+
+ mtab = setmntent(MTAB, "r");
+ if (!mtab) {
+ ERROR("unable to open %s for reading", MTAB);
+ exit(EXIT_FAILURE);
+ }
+
+ printf("Mount Point Options\n");
+ while ((ent = getmntent(mtab))) {
+ if (strcasecmp(FS_NAME, ent->mnt_type) == 0)
+ printf("%-25s %s\n", ent->mnt_dir, ent->mnt_opts);
+ }
+
+ endmntent(mtab);
+}
+
enum {
POOL_MIN,
POOL_MAX,
@@ -256,6 +282,7 @@ int main(int argc, char** argv)
struct option long_opts[] = {
{"help", no_argument, NULL, 'h'},
+ {"mounts-list", no_argument, NULL, LONG_MOUNT_LIST},
{"pool-list", no_argument, NULL, LONG_POOL_LIST},
{"pool-pages-min", required_argument, NULL, LONG_POOL_MIN_ADJ},
{"pool-pages-max", required_argument, NULL, LONG_POOL_MAX_ADJ},
@@ -294,6 +321,11 @@ int main(int argc, char** argv)
switch (ret) {
case -1:
break;
+
+ case LONG_MOUNT_LIST:
+ mount_list();
+ break;
+
case LONG_POOL_LIST:
pool_list();
break;
--
1.6.0.4
------------------------------------------------------------------------------
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