[Pvfs2-cvs] commit by pcarns in pvfs2-1/src/apps/admin: pvfs2-drop-caches.c module.mk.in

[CVS commit program]

Update of /projects/cvsroot/pvfs2-1/src/apps/admin
In directory parlweb1:/tmp/cvs-serv6835/src/apps/admin

Modified Files:
      Tag: small-file-branch
	module.mk.in 
Added Files:
      Tag: small-file-branch
	pvfs2-drop-caches.c 
Log Message:
reverse merge latest trunk changes to small-file-branch and update msgpair
usage where needed


--- /dev/null	2004-06-24 14:04:38.000000000 -0400
+++ pvfs2-drop-caches.c	2008-06-24 11:01:28.000000000 -0400
@@ -0,0 +1,179 @@
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <time.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include "pvfs2.h"
+#include "pvfs2-mgmt.h"
+
+#ifndef PVFS2_VERSION
+#define PVFS2_VERSION "Unknown"
+#endif
+
+struct options
+{
+    char* mnt_point;
+    int mnt_point_set;
+};
+
+static struct options* parse_args(int argc, char* argv[]);
+static void usage(int argc, char** argv);
+
+int main(int argc, char **argv)
+{
+    int ret = -1;
+    PVFS_fs_id cur_fs;
+    struct options* user_opts = NULL;
+    char pvfs_path[PVFS_NAME_MAX] = {0};
+    PVFS_credentials creds;
+
+    /* look at command line arguments */
+    user_opts = parse_args(argc, argv);
+    if(!user_opts)
+    {
+	fprintf(stderr, "Error: failed to parse command line arguments.\n");
+	usage(argc, argv);
+	return(-1);
+    }
+
+    ret = PVFS_util_init_defaults();
+    if(ret < 0)
+    {
+	PVFS_perror("PVFS_util_init_defaults", ret);
+	return(-1);
+    }
+
+    /* translate local path into pvfs2 relative path */
+    ret = PVFS_util_resolve(user_opts->mnt_point,
+        &cur_fs, pvfs_path, PVFS_NAME_MAX);
+    if(ret < 0)
+    {
+	fprintf(stderr, "Error: could not find filesystem for %s in pvfstab\n", 
+	    user_opts->mnt_point);
+	return(-1);
+    }
+
+    PVFS_util_gen_credentials(&creds);
+
+    ret = PVFS_mgmt_setparam_all(cur_fs,
+				 &creds,
+				 PVFS_SERV_PARAM_DROP_CACHES,
+				 0,
+				 NULL,
+				 NULL /* detailed errors */);
+    if(ret < 0)
+    {
+        PVFS_perror("PVFS_mgmt_setparam_all", ret);
+        return(-1);
+    }
+
+    PVFS_sys_finalize();
+
+    return(ret);
+}
+
+
+/* parse_args()
+ *
+ * parses command line arguments
+ *
+ * returns pointer to options structure on success, NULL on failure
+ */
+static struct options* parse_args(int argc, char* argv[])
+{
+    char flags[] = "vm:";
+    int one_opt = 0;
+    int len = 0;
+
+    struct options* tmp_opts = NULL;
+    int ret = -1;
+
+    /* create storage for the command line options */
+    tmp_opts = (struct options*)malloc(sizeof(struct options));
+    if(!tmp_opts){
+	return(NULL);
+    }
+    memset(tmp_opts, 0, sizeof(struct options));
+
+    /* look at command line arguments */
+    while((one_opt = getopt(argc, argv, flags)) != EOF){
+	switch(one_opt)
+        {
+            case('v'):
+                printf("%s\n", PVFS2_VERSION);
+                exit(0);
+	    case('m'):
+		len = strlen(optarg)+1;
+		tmp_opts->mnt_point = (char*)malloc(len+1);
+		if(!tmp_opts->mnt_point)
+		{
+		    free(tmp_opts);
+		    return(NULL);
+		}
+		memset(tmp_opts->mnt_point, 0, len+1);
+		ret = sscanf(optarg, "%s", tmp_opts->mnt_point);
+		if(ret < 1){
+		    free(tmp_opts);
+		    return(NULL);
+		}
+		/* TODO: dirty hack... fix later.  The remove_dir_prefix()
+		 * function expects some trailing segments or at least
+		 * a slash off of the mount point
+		 */
+		strcat(tmp_opts->mnt_point, "/");
+		tmp_opts->mnt_point_set = 1;
+		break;
+	    case('?'):
+		usage(argc, argv);
+		exit(EXIT_FAILURE);
+	}
+    }
+
+    if(optind < argc)
+    {
+	usage(argc, argv);
+	exit(EXIT_FAILURE);
+    }
+
+    if(!tmp_opts->mnt_point_set)
+    {
+	free(tmp_opts);
+	return(NULL);
+    }
+
+    return(tmp_opts);
+}
+
+
+static void usage(int argc, char** argv)
+{
+    fprintf(stderr, "\n");
+    fprintf(stderr, "Usage  : %s [-m fs_mount_point]\n",
+	argv[0]);
+    fprintf(stderr, "Request that the OS flush and drop all I/O caches on servers.\n");
+
+    return;
+}
+
+/*
+ * Local variables:
+ *  c-indent-level: 4
+ *  c-basic-offset: 4
+ * End:
+ *
+ * vim: ts=8 sts=4 sw=4 expandtab
+ */
+

Index: module.mk.in
===================================================================
RCS file: /projects/cvsroot/pvfs2-1/src/apps/admin/module.mk.in,v
diff -p -u -r1.46 -r1.46.6.1
--- module.mk.in	7 Nov 2007 21:46:55 -0000	1.46
+++ module.mk.in	24 Jun 2008 15:01:28 -0000	1.46.6.1
@@ -27,7 +27,8 @@ ADMINSRC := \
 	$(DIR)/pvfs2-remove-object.c \
 	$(DIR)/pvfs2-ln.c \
 	$(DIR)/pvfs2-perror.c \
-	$(DIR)/pvfs2-check-server.c
+	$(DIR)/pvfs2-check-server.c \
+	$(DIR)/pvfs2-drop-caches.c
 
 ADMINSRC_SERVER := \
 	$(DIR)/pvfs2-mkspace.c \