Added all files

1 files changed, 1349 insertions, 0 deletions

diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c
new file mode 100644
index 00000000000..616c7a8ce68
--- /dev/null
+++ b/libglusterfs/src/common-utils.c
@@ -0,0 +1,1349 @@
+/*
+  Copyright (c) 2006, 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef HAVE_BACKTRACE
+#include <execinfo.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <unistd.h>
+#include <time.h>
+#include <locale.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <signal.h>
+
+#include "logging.h"
+#include "common-utils.h"
+#include "revision.h"
+#include "glusterfs.h"
+#include "stack.h"
+
+typedef int32_t (*rw_op_t)(int32_t fd, char *buf, int32_t size);
+typedef int32_t (*rwv_op_t)(int32_t fd, const struct iovec *buf, int32_t size);
+static glusterfs_ctx_t *gf_global_ctx;
+
+
+struct dnscache6 {
+	struct addrinfo *first;
+	struct addrinfo *next;
+};
+
+int32_t
+gf_resolve_ip6 (const char *hostname, 
+		uint16_t port, 
+		int family, 
+		void **dnscache, 
+		struct addrinfo **addr_info)
+{
+	int32_t ret = 0;
+	struct addrinfo hints;
+	struct dnscache6 *cache = NULL;
+	char service[NI_MAXSERV], host[NI_MAXHOST];
+
+	if (!hostname) {
+		gf_log ("resolver", GF_LOG_WARNING, "hostname is NULL");
+		return -1;
+	}
+
+	if (!*dnscache) {
+		*dnscache = CALLOC (1, sizeof (struct dnscache6));
+	}
+
+	cache = *dnscache;
+	if (cache->first && !cache->next) {
+		freeaddrinfo(cache->first);
+		cache->first = cache->next = NULL;
+		gf_log ("resolver", GF_LOG_DEBUG,
+			"flushing DNS cache");
+	}
+
+	if (!cache->first) {
+		char *port_str = NULL;
+		gf_log ("resolver", GF_LOG_DEBUG,
+			"DNS cache not present, freshly probing hostname: %s",
+			hostname);
+
+		memset(&hints, 0, sizeof(hints));
+		hints.ai_family   = family;
+		hints.ai_socktype = SOCK_STREAM;
+		hints.ai_flags    = AI_ADDRCONFIG;
+
+		asprintf (&port_str, "%d", port);
+		if ((ret = getaddrinfo(hostname, port_str, &hints, &cache->first)) != 0) {
+			gf_log ("resolver", GF_LOG_ERROR,
+				"getaddrinfo failed (%s)", gai_strerror (ret));
+
+			free (*dnscache);
+			*dnscache = NULL;
+			free (port_str);
+			return -1;
+		}
+		free (port_str);
+
+		cache->next = cache->first;
+	}
+
+	if (cache->next) {
+		ret = getnameinfo((struct sockaddr *)cache->next->ai_addr,
+				  cache->next->ai_addrlen,
+				  host, sizeof (host),
+				  service, sizeof (service),
+				  NI_NUMERICHOST);
+		if (ret != 0) {
+			gf_log ("resolver",
+				GF_LOG_ERROR,
+				"getnameinfo failed (%s)", gai_strerror (ret));
+			goto err;
+		}
+
+		gf_log ("resolver", GF_LOG_DEBUG,
+			"returning ip-%s (port-%s) for hostname: %s and port: %d",
+			host, service, hostname, port);
+
+		*addr_info = cache->next;
+	}
+
+	cache->next = cache->next->ai_next;
+	if (cache->next) {
+		ret = getnameinfo((struct sockaddr *)cache->next->ai_addr,
+				  cache->next->ai_addrlen,
+				  host, sizeof (host),
+				  service, sizeof (service),
+				  NI_NUMERICHOST);
+		if (ret != 0) {
+			gf_log ("resolver",
+				GF_LOG_ERROR,
+				"getnameinfo failed (%s)", gai_strerror (ret));
+			goto err;
+		}
+
+		gf_log ("resolver", GF_LOG_DEBUG,
+			"next DNS query will return: ip-%s port-%s", host, service);
+	}
+
+	return 0;
+
+err:
+	freeaddrinfo (cache->first);
+	cache->first = cache->next = NULL;
+	free (cache);
+	*dnscache = NULL;
+	return -1;
+}
+
+char *gf_fop_list[GF_FOP_MAXVALUE];
+char *gf_mop_list[GF_MOP_MAXVALUE];
+char *gf_cbk_list[GF_CBK_MAXVALUE];
+
+void
+gf_global_variable_init()
+{
+	gf_fop_list[GF_FOP_STAT]        = "STAT";       /* 0 */
+	gf_fop_list[GF_FOP_READLINK]    = "READLINK";   /* 1 */
+	gf_fop_list[GF_FOP_MKNOD]       = "MKNOD";      /* 2 */
+	gf_fop_list[GF_FOP_MKDIR]       = "MKDIR";
+	gf_fop_list[GF_FOP_UNLINK]      = "UNLINK";
+	gf_fop_list[GF_FOP_RMDIR]       = "RMDIR";      /* 5 */
+	gf_fop_list[GF_FOP_SYMLINK]     = "SYMLINK";
+	gf_fop_list[GF_FOP_RENAME]      = "RENAME";
+	gf_fop_list[GF_FOP_LINK]        = "LINK";
+	gf_fop_list[GF_FOP_CHMOD]       = "CHMOD";
+	gf_fop_list[GF_FOP_CHOWN]       = "CHOWN";      /* 10 */
+	gf_fop_list[GF_FOP_TRUNCATE]    = "TRUNCATE";
+	gf_fop_list[GF_FOP_OPEN]        = "OPEN";
+	gf_fop_list[GF_FOP_READ]        = "READ";
+	gf_fop_list[GF_FOP_WRITE]       = "WRITE";
+	gf_fop_list[GF_FOP_STATFS]      = "STATFS";     /* 15 */
+	gf_fop_list[GF_FOP_FLUSH]       = "FLUSH";
+	gf_fop_list[GF_FOP_FSYNC]       = "FSYNC";
+	gf_fop_list[GF_FOP_SETXATTR]    = "SETXATTR";
+	gf_fop_list[GF_FOP_GETXATTR]    = "GETXATTR";   /* 20 */
+	gf_fop_list[GF_FOP_REMOVEXATTR] = "REMOVEXATTR";
+	gf_fop_list[GF_FOP_OPENDIR]     = "OPENDIR";
+	gf_fop_list[GF_FOP_GETDENTS]    = "GETDENTS";
+	gf_fop_list[GF_FOP_FSYNCDIR]    = "FSYNCDIR";   /* 25 */
+	gf_fop_list[GF_FOP_ACCESS]      = "ACCESS";
+	gf_fop_list[GF_FOP_CREATE]      = "CREATE";
+	gf_fop_list[GF_FOP_FTRUNCATE]   = "FTRUNCATE";
+	gf_fop_list[GF_FOP_FSTAT]       = "FSTAT";
+	gf_fop_list[GF_FOP_LK]          = "LK";         /* 30 */
+	gf_fop_list[GF_FOP_UTIMENS]     = "UTIMENS";
+	gf_fop_list[GF_FOP_FCHMOD]      = "FCHMOD";
+	gf_fop_list[GF_FOP_FCHOWN]      = "FCHOWN";
+	gf_fop_list[GF_FOP_LOOKUP]      = "LOOKUP";
+	gf_fop_list[GF_FOP_SETDENTS]    = "SETDENTS";   /* 35 */
+	gf_fop_list[GF_FOP_READDIR]     = "READDIR";
+	gf_fop_list[GF_FOP_INODELK]     = "INODELK";
+	gf_fop_list[GF_FOP_FINODELK]    = "FINODELK";      
+	gf_fop_list[GF_FOP_ENTRYLK]     = "ENTRYLK";
+	gf_fop_list[GF_FOP_FENTRYLK]    = "FENTRYLK";   /* 40 */
+	gf_fop_list[GF_FOP_CHECKSUM]    = "CHECKSUM";   /* 41 */   
+	gf_fop_list[GF_FOP_XATTROP]     = "XATTROP";
+
+	gf_mop_list[GF_MOP_SETVOLUME]   = "SETVOLUME"; /* 0 */
+	gf_mop_list[GF_MOP_GETVOLUME]   = "GETVOLUME"; /* 1 */
+	gf_mop_list[GF_MOP_STATS]       = "STATS";
+	gf_mop_list[GF_MOP_SETSPEC]     = "SETSPEC";
+	gf_mop_list[GF_MOP_GETSPEC]     = "GETSPEC";
+	
+	gf_cbk_list[GF_CBK_FORGET]      = "FORGET";
+	gf_cbk_list[GF_CBK_RELEASE]     = "RELEASE";
+	gf_cbk_list[GF_CBK_RELEASEDIR]  = "RELEASEDIR";
+	/* Are there any more variables to be included? All global 
+	   variables initialization should go here */
+
+	return;
+}
+
+void 
+set_global_ctx_ptr (glusterfs_ctx_t *ctx)
+{
+	gf_global_ctx = ctx;
+}
+
+glusterfs_ctx_t *
+get_global_ctx_ptr (void)
+{
+	return gf_global_ctx;
+}
+
+void 
+gf_log_volume_file (FILE *specfp)
+{
+	extern FILE *gf_log_logfile;
+	int          lcount = 0;
+	char         data[GF_UNIT_KB];
+	
+	fseek (specfp, 0L, SEEK_SET);
+	
+	fprintf (gf_log_logfile, "Given volfile:\n");
+	fprintf (gf_log_logfile, 
+		 "+---------------------------------------"
+		 "---------------------------------------+\n");
+	while (!feof (specfp)) {
+		if (fgets (data, GF_UNIT_KB, specfp) == NULL)
+			break;
+		lcount++;
+		fprintf (gf_log_logfile, "%3d: %s", lcount, data);
+	}
+	fprintf (gf_log_logfile, 
+		 "\n+---------------------------------------"
+		 "---------------------------------------+\n");
+	fflush (gf_log_logfile);
+	fseek (specfp, 0L, SEEK_SET);
+}
+
+static void 
+gf_dump_config_flags (int fd)
+{
+
+	write (fd, "configuration details:\n", 22);
+
+/* have argp */
+#ifdef HAVE_ARGP
+	write (fd, "argp 1\n", 7);
+#endif
+
+/* ifdef if found backtrace */
+#ifdef HAVE_BACKTRACE 
+	write (fd, "backtrace 1\n", 12);
+#endif
+
+/* Berkeley-DB version has cursor->get() */
+#ifdef HAVE_BDB_CURSOR_GET 
+	write (fd, "bdb->cursor->get 1\n", 19);
+#endif
+
+/* Define to 1 if you have the <db.h> header file. */
+#ifdef HAVE_DB_H 
+	write (fd, "db.h 1\n", 7);
+#endif
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#ifdef HAVE_DLFCN_H 
+	write (fd, "dlfcn 1\n", 8);
+#endif
+
+/* define if fdatasync exists */
+#ifdef HAVE_FDATASYNC 
+	write (fd, "fdatasync 1\n", 12);
+#endif
+
+/* Define to 1 if you have the `pthread' library (-lpthread). */
+#ifdef HAVE_LIBPTHREAD 
+	write (fd, "libpthread 1\n", 13);
+#endif
+
+/* define if llistxattr exists */
+#ifdef HAVE_LLISTXATTR 
+	write (fd, "llistxattr 1\n", 13);
+#endif
+
+/* define if found setfsuid setfsgid */
+#ifdef HAVE_SET_FSID 
+	write (fd, "setfsid 1\n", 10);
+#endif
+
+/* define if found spinlock */
+#ifdef HAVE_SPINLOCK 
+	write (fd, "spinlock 1\n", 11);
+#endif
+
+/* Define to 1 if you have the <sys/epoll.h> header file. */
+#ifdef HAVE_SYS_EPOLL_H 
+	write (fd, "epoll.h 1\n", 10);
+#endif
+
+/* Define to 1 if you have the <sys/extattr.h> header file. */
+#ifdef HAVE_SYS_EXTATTR_H 
+	write (fd, "extattr.h 1\n", 12);
+#endif
+
+/* Define to 1 if you have the <sys/xattr.h> header file. */
+#ifdef HAVE_SYS_XATTR_H 
+	write (fd, "xattr.h 1\n", 10);
+#endif
+
+/* define if found st_atim.tv_nsec */
+#ifdef HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC
+	write (fd, "st_atim.tv_nsec 1\n", 18);
+#endif
+
+/* define if found st_atimespec.tv_nsec */
+#ifdef HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC
+	write (fd, "st_atimespec.tv_nsec 1\n",23);
+#endif
+
+/* Define to the full name and version of this package. */
+#ifdef PACKAGE_STRING 
+	{
+		char msg[128];
+		sprintf (msg, "package-string: %s\n", PACKAGE_STRING); 
+		write (fd, msg, strlen (msg));
+	}
+#endif
+
+	return;
+}
+
+/* Obtain a backtrace and print it to stdout. */
+/* TODO: It looks like backtrace_symbols allocates memory,
+   it may be problem because mostly memory allocation/free causes 'sigsegv' */
+void
+gf_print_trace (int32_t signum)
+{
+	extern FILE *gf_log_logfile;
+	int fd = fileno (gf_log_logfile);
+	char msg[1024];
+
+
+	/* Pending frames, (if any), list them in order */
+	write (fd, "pending frames:\n", 16);
+	{
+		extern glusterfs_ctx_t *gf_global_ctx;
+		glusterfs_ctx_t *ctx = gf_global_ctx;
+		struct list_head *trav = ((call_pool_t *)ctx->pool)->all_frames.next;
+		while (trav != (&((call_pool_t *)ctx->pool)->all_frames)) {
+			call_frame_t *tmp = (call_frame_t *)(&((call_stack_t *)trav)->frames);
+			if ((tmp->root->type == GF_OP_TYPE_FOP_REQUEST) ||
+			    (tmp->root->type == GF_OP_TYPE_FOP_REPLY))
+				sprintf (msg,"frame : type(%d) op(%s)\n",
+					 tmp->root->type, 
+					 gf_fop_list[tmp->root->op]);
+			if ((tmp->root->type == GF_OP_TYPE_MOP_REQUEST) ||
+			    (tmp->root->type == GF_OP_TYPE_MOP_REPLY))
+				sprintf (msg,"frame : type(%d) op(%s)\n",
+					 tmp->root->type, 
+					 gf_mop_list[tmp->root->op]);
+			if ((tmp->root->type == GF_OP_TYPE_CBK_REQUEST) ||
+			    (tmp->root->type == GF_OP_TYPE_CBK_REPLY))
+				sprintf (msg,"frame : type(%d) op(%s)\n",
+					 tmp->root->type, 
+					 gf_cbk_list[tmp->root->op]);
+			
+			write (fd, msg, strlen (msg));
+			trav = trav->next;
+		}
+		write (fd, "\n", 1);
+	}
+
+	sprintf (msg, "patchset: %s\n", GLUSTERFS_REPOSITORY_REVISION); 
+	write (fd, msg, strlen (msg));
+
+	sprintf (msg, "signal received: %d\n", signum); 
+	write (fd, msg, strlen (msg));
+
+	gf_dump_config_flags (fd);
+#if HAVE_BACKTRACE
+	/* Print 'backtrace' */
+	{
+		void *array[200];
+		size_t size;
+    
+		size = backtrace (array, 200);
+		backtrace_symbols_fd (&array[1], size-1, fd);
+		sprintf (msg, "---------\n");
+		write (fd, msg, strlen (msg));
+	}
+#endif /* HAVE_BACKTRACE */
+  
+	/* Send a signal to terminate the process */
+	signal (signum, SIG_DFL);
+	raise (signum);
+}
+
+void
+trap (void)
+{
+
+}
+
+char *
+gf_trim (char *string)
+{
+	register char *s, *t;
+  
+	if (string == NULL)
+	{
+		return NULL;
+	}
+  
+	for (s = string; isspace (*s); s++)
+		;
+  
+	if (*s == 0)
+		return s;
+  
+	t = s + strlen (s) - 1;
+	while (t > s && isspace (*t))
+		t--;
+	*++t = '\0';
+  
+	return s;
+}
+
+int 
+gf_strsplit (const char *str, const char *delim, 
+	     char ***tokens, int *token_count)
+{
+	char *_running = NULL;
+	char *running = NULL;
+	char *token = NULL;
+	char **token_list = NULL;
+	int count = 0;
+	int i = 0;
+	int j = 0;
+  
+	if (str == NULL || delim == NULL || tokens == NULL || token_count == NULL)
+	{
+		return -1;
+	}
+  
+	if ((_running = strdup (str)) == NULL)
+	{
+		return -1;
+	}
+	running = _running;
+  
+	while ((token = strsep (&running, delim)) != NULL)
+	{
+		if (token[0] != '\0')
+			count++;
+	}
+	free (_running);
+  
+	if ((_running = strdup (str)) == NULL)
+	{
+		return -1;
+	}
+	running = _running;
+  
+	if ((token_list = CALLOC (count, sizeof (char *))) == NULL)
+	{
+		free (_running);
+		return -1;
+	}
+  
+	while ((token = strsep (&running, delim)) != NULL)
+	{
+		if (token[0] == '\0')
+			continue;
+      
+		if ((token_list[i++] = strdup (token)) == NULL)
+			goto free_exit;
+	}
+  
+	free (_running);
+  
+	*tokens = token_list;
+	*token_count = count;
+	return 0;
+  
+free_exit:
+	free (_running);
+	for (j = 0; j < i; j++)
+	{
+		free (token_list[j]);
+	}
+	free (token_list);
+	return -1;
+}
+
+int 
+gf_volume_name_validate (const char *volume_name)
+{
+	const char *vname = NULL;
+  
+	if (volume_name == NULL)
+	{
+		return -1;
+	}
+  
+	if (!isalpha (volume_name[0]))
+	{
+		return 1;
+	}
+  
+	for (vname = &volume_name[1]; *vname != '\0'; vname++)
+	{
+		if (!(isalnum (*vname) || *vname == '_'))
+			return 1;
+	}
+  
+	return 0;
+}
+
+
+int 
+gf_string2time (const char *str, uint32_t *n)
+{
+	unsigned long value = 0;
+	char *tail = NULL;
+	int old_errno = 0;
+	const char *s = NULL;
+  
+	if (str == NULL || n == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+  
+	for (s = str; *s != '\0'; s++)
+	{
+		if (isspace (*s))
+		{
+			continue;
+		}
+		if (*s == '-')
+		{
+			return -1;
+		}
+		break;
+	}
+  
+	old_errno = errno;
+	errno = 0;
+	value = strtol (str, &tail, 0);
+  
+	if (errno == ERANGE || errno == EINVAL)
+	{
+		return -1;
+	}
+  
+	if (errno == 0)
+	{
+		errno = old_errno;
+	}
+  
+	if (!((tail[0] == '\0') || 
+	      ((tail[0] == 's') && (tail[1] == '\0')) ||
+	      ((tail[0] == 's') && (tail[1] == 'e') && (tail[2] == 'c') && (tail[3] == '\0'))))
+	{
+		return -1;
+	}
+  
+	*n = value;
+  
+	return 0;
+}
+
+
+int 
+gf_string2percent (const char *str, uint32_t *n)
+{
+	unsigned long value = 0;
+	char *tail = NULL;
+	int old_errno = 0;
+	const char *s = NULL;
+  
+	if (str == NULL || n == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+  
+	for (s = str; *s != '\0'; s++)
+	{
+		if (isspace (*s))
+		{
+			continue;
+		}
+		if (*s == '-')
+		{
+			return -1;
+		}
+		break;
+	}
+  
+	old_errno = errno;
+	errno = 0;
+	value = strtol (str, &tail, 0);
+  
+	if (errno == ERANGE || errno == EINVAL)
+	{
+		return -1;
+	}
+  
+	if (errno == 0)
+	{
+		errno = old_errno;
+	}
+  
+	if (!((tail[0] == '\0') || 
+	      ((tail[0] == '%') && (tail[1] == '\0'))))
+	{
+		return -1;
+	}
+  
+	*n = value;
+  
+	return 0;
+}
+
+
+static int 
+_gf_string2long (const char *str, long *n, int base)
+{
+	long value = 0;
+	char *tail = NULL;
+	int old_errno = 0;
+  
+	if (str == NULL || n == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+  
+	old_errno = errno;
+	errno = 0;
+	value = strtol (str, &tail, base);
+  
+	if (errno == ERANGE || errno == EINVAL)
+	{
+		return -1;
+	}
+  
+	if (errno == 0)
+	{
+		errno = old_errno;
+	}
+
+	if (tail[0] != '\0')
+	{
+		/* bala: invalid integer format */
+		return -1;
+	}
+  
+	*n = value;
+  
+	return 0;
+}
+
+static int 
+_gf_string2ulong (const char *str, unsigned long *n, int base)
+{
+	unsigned long value = 0;
+	char *tail = NULL;
+	int old_errno = 0;
+	const char *s = NULL;
+  
+	if (str == NULL || n == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+  
+	for (s = str; *s != '\0'; s++)
+	{
+		if (isspace (*s))
+		{
+			continue;
+		}
+		if (*s == '-')
+		{
+			/* bala: we do not support suffixed (-) sign and 
+			   invalid integer format */
+			return -1;
+		}
+		break;
+	}
+  
+	old_errno = errno;
+	errno = 0;
+	value = strtoul (str, &tail, base);
+  
+	if (errno == ERANGE || errno == EINVAL)
+	{
+		return -1;
+	}
+  
+	if (errno == 0)
+	{
+		errno = old_errno;
+	}
+  
+	if (tail[0] != '\0')
+	{
+		/* bala: invalid integer format */
+		return -1;
+	}
+  
+	*n = value;
+  
+	return 0;
+}
+
+static int 
+_gf_string2uint (const char *str, unsigned int *n, int base)
+{
+	unsigned long value = 0;
+	char *tail = NULL;
+	int old_errno = 0;
+	const char *s = NULL;
+  
+	if (str == NULL || n == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+  
+	for (s = str; *s != '\0'; s++)
+	{
+		if (isspace (*s))
+		{
+			continue;
+		}
+		if (*s == '-')
+		{
+			/* bala: we do not support suffixed (-) sign and 
+			   invalid integer format */
+			return -1;
+		}
+		break;
+	}
+  
+	old_errno = errno;
+	errno = 0;
+	value = strtoul (str, &tail, base);
+  
+	if (errno == ERANGE || errno == EINVAL)
+	{
+		return -1;
+	}
+  
+	if (errno == 0)
+	{
+		errno = old_errno;
+	}
+  
+	if (tail[0] != '\0')
+	{
+		/* bala: invalid integer format */
+		return -1;
+	}
+  
+	*n = (unsigned int)value;
+  
+	return 0;
+}
+
+static int 
+_gf_string2longlong (const char *str, long long *n, int base)
+{
+	long long value = 0;
+	char *tail = NULL;
+	int old_errno = 0;
+  
+	if (str == NULL || n == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+  
+	old_errno = errno;
+	errno = 0;
+	value = strtoll (str, &tail, base);
+  
+	if (errno == ERANGE || errno == EINVAL)
+	{
+		return -1;
+	}
+  
+	if (errno == 0)
+	{
+		errno = old_errno;
+	}
+  
+	if (tail[0] != '\0')
+	{
+		/* bala: invalid integer format */
+		return -1;
+	}
+  
+	*n = value;
+  
+	return 0;
+}
+
+static int 
+_gf_string2ulonglong (const char *str, unsigned long long *n, int base)
+{
+	unsigned long long value = 0;
+	char *tail = NULL;
+	int old_errno = 0;
+	const char *s = NULL;
+  
+	if (str == NULL || n == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+  
+	for (s = str; *s != '\0'; s++)
+	{
+		if (isspace (*s))
+		{
+			continue;
+		}
+		if (*s == '-')
+		{
+			/* bala: we do not support suffixed (-) sign and 
+			   invalid integer format */
+			return -1;
+		}
+		break;
+	}
+  
+	old_errno = errno;
+	errno = 0;
+	value = strtoull (str, &tail, base);
+  
+	if (errno == ERANGE || errno == EINVAL)
+	{
+		return -1;
+	}
+  
+	if (errno == 0)
+	{
+		errno = old_errno;
+	}
+  
+	if (tail[0] != '\0')
+	{
+		/* bala: invalid integer format */
+		return -1;
+	}
+  
+	*n = value;
+  
+	return 0;
+}
+
+int 
+gf_string2long (const char *str, long *n)
+{
+	return _gf_string2long (str, n, 0);
+}
+
+int 
+gf_string2ulong (const char *str, unsigned long *n)
+{
+	return _gf_string2ulong (str, n, 0);
+}
+
+int 
+gf_string2int (const char *str, int *n)
+{
+	return _gf_string2long (str, (long *) n, 0);
+}
+
+int 
+gf_string2uint (const char *str, unsigned int *n)
+{
+	return _gf_string2uint (str, n, 0);
+}
+
+int 
+gf_string2longlong (const char *str, long long *n)
+{
+	return _gf_string2longlong (str, n, 0);
+}
+
+int 
+gf_string2ulonglong (const char *str, unsigned long long *n)
+{
+	return _gf_string2ulonglong (str, n, 0);
+}
+
+int 
+gf_string2int8 (const char *str, int8_t *n)
+{
+	long l = 0L;
+	int rv = 0;
+  
+	rv = _gf_string2long (str, &l, 0);
+	if (rv != 0)
+		return rv;
+  
+	if (l >= INT8_MIN && l <= INT8_MAX)
+	{
+		*n = (int8_t) l;
+		return 0;
+	}
+  
+	errno = ERANGE;
+	return -1;
+}
+
+int 
+gf_string2int16 (const char *str, int16_t *n)
+{
+	long l = 0L;
+	int rv = 0;
+  
+	rv = _gf_string2long (str, &l, 0);
+	if (rv != 0)
+		return rv;
+  
+	if (l >= INT16_MIN && l <= INT16_MAX)
+	{
+		*n = (int16_t) l;
+		return 0;
+	}
+  
+	errno = ERANGE;
+	return -1;
+}
+
+int 
+gf_string2int32 (const char *str, int32_t *n)
+{
+	long l = 0L;
+	int rv = 0;
+  
+	rv = _gf_string2long (str, &l, 0);
+	if (rv != 0)
+		return rv;
+  
+	if (l >= INT32_MIN && l <= INT32_MAX)
+	{
+		*n = (int32_t) l;
+		return 0;
+	}
+  
+	errno = ERANGE;
+	return -1;
+}
+
+int 
+gf_string2int64 (const char *str, int64_t *n)
+{
+	long long l = 0LL;
+	int rv = 0;
+  
+	rv = _gf_string2longlong (str, &l, 0);
+	if (rv != 0)
+		return rv;
+  
+	if (l >= INT64_MIN && l <= INT64_MAX)
+	{
+		*n = (int64_t) l;
+		return 0;
+	}
+  
+	errno = ERANGE;
+	return -1;
+}
+
+int 
+gf_string2uint8 (const char *str, uint8_t *n)
+{
+	unsigned long l = 0L;
+	int rv = 0;
+  
+	rv = _gf_string2ulong (str, &l, 0);
+	if (rv != 0)
+		return rv;
+  
+	if (l >= 0 && l <= UINT8_MAX)
+	{
+		*n = (uint8_t) l;
+		return 0;
+	}
+  
+	errno = ERANGE;
+	return -1;
+}
+
+int 
+gf_string2uint16 (const char *str, uint16_t *n)
+{
+	unsigned long l = 0L;
+	int rv = 0;
+  
+	rv = _gf_string2ulong (str, &l, 0);
+	if (rv != 0)
+		return rv;
+  
+	if (l >= 0 && l <= UINT16_MAX)
+	{
+		*n = (uint16_t) l;
+		return 0;
+	}
+  
+	errno = ERANGE;
+	return -1;
+}
+
+int 
+gf_string2uint32 (const char *str, uint32_t *n)
+{
+	unsigned long l = 0L;
+	int rv = 0;
+  
+	rv = _gf_string2ulong (str, &l, 0);
+	if (rv != 0)
+		return rv;
+  
+	if (l >= 0 && l <= UINT32_MAX)
+	{
+		*n = (uint32_t) l;
+		return 0;
+	}
+  
+	errno = ERANGE;
+	return -1;
+}
+
+int 
+gf_string2uint64 (const char *str, uint64_t *n)
+{
+	unsigned long long l = 0ULL;
+	int rv = 0;
+  
+	rv = _gf_string2ulonglong (str, &l, 0);
+	if (rv != 0)
+		return rv;
+  
+	if (l >= 0 && l <= UINT64_MAX)
+	{
+		*n = (uint64_t) l;
+		return 0;
+	}
+  
+	errno = ERANGE;
+	return -1;
+}
+
+int 
+gf_string2ulong_base10 (const char *str, unsigned long *n)
+{
+	return _gf_string2ulong (str, n, 10);
+}
+
+int 
+gf_string2uint_base10 (const char *str, unsigned int *n)
+{
+	return _gf_string2uint (str,  n, 10);
+}
+
+int 
+gf_string2uint8_base10 (const char *str, uint8_t *n)
+{
+	unsigned long l = 0L;
+	int rv = 0;
+  
+	rv = _gf_string2ulong (str, &l, 10);
+	if (rv != 0)
+		return rv;
+  
+	if (l >= 0 && l <= UINT8_MAX)
+	{
+		*n = (uint8_t) l;
+		return 0;
+	}
+  
+	errno = ERANGE;
+	return -1;
+}
+
+int 
+gf_string2uint16_base10 (const char *str, uint16_t *n)
+{
+	unsigned long l = 0L;
+	int rv = 0;
+  
+	rv = _gf_string2ulong (str, &l, 10);
+	if (rv != 0)
+		return rv;
+  
+	if (l >= 0 && l <= UINT16_MAX)
+	{
+		*n = (uint16_t) l;
+		return 0;
+	}
+  
+	errno = ERANGE;
+	return -1;
+}
+
+int 
+gf_string2uint32_base10 (const char *str, uint32_t *n)
+{
+	unsigned long l = 0L;
+	int rv = 0;
+  
+	rv = _gf_string2ulong (str, &l, 10);
+	if (rv != 0)
+		return rv;
+  
+	if (l >= 0 && l <= UINT32_MAX)
+	{
+		*n = (uint32_t) l;
+		return 0;
+	}
+  
+	errno = ERANGE;
+	return -1;
+}
+
+int 
+gf_string2uint64_base10 (const char *str, uint64_t *n)
+{
+	unsigned long long l = 0ULL;
+	int rv = 0;
+  
+	rv = _gf_string2ulonglong (str, &l, 10);
+	if (rv != 0)
+		return rv;
+  
+	if (l >= 0 && l <= UINT64_MAX)
+	{
+		*n = (uint64_t) l;
+		return 0;
+	}
+  
+	errno = ERANGE;
+	return -1;
+}
+
+int 
+gf_string2bytesize (const char *str, uint64_t *n)
+{
+	uint64_t value = 0ULL;
+	char *tail = NULL;
+	int old_errno = 0;
+	const char *s = NULL;
+  
+	if (str == NULL || n == NULL)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+  
+	for (s = str; *s != '\0'; s++)
+	{
+		if (isspace (*s))
+		{
+			continue;
+		}
+		if (*s == '-')
+		{
+			/* bala: we do not support suffixed (-) sign and 
+			   invalid integer format */
+			return -1;
+		}
+		break;
+	}
+  
+	old_errno = errno;
+	errno = 0;
+	value = strtoull (str, &tail, 10);
+  
+	if (errno == ERANGE || errno == EINVAL)
+	{
+		return -1;
+	}
+  
+	if (errno == 0)
+	{
+		errno = old_errno;
+	}
+  
+	if (tail[0] != '\0')
+	{
+		if (strcasecmp (tail, GF_UNIT_KB_STRING) == 0)
+		{
+			value *= GF_UNIT_KB;
+		}
+		else if (strcasecmp (tail, GF_UNIT_MB_STRING) == 0)
+		{
+			value *= GF_UNIT_MB;
+		}
+		else if (strcasecmp (tail, GF_UNIT_GB_STRING) == 0)
+		{
+			value *= GF_UNIT_GB;
+		}
+		else if (strcasecmp (tail, GF_UNIT_TB_STRING) == 0)
+		{
+			value *= GF_UNIT_TB;
+		}
+		else if (strcasecmp (tail, GF_UNIT_PB_STRING) == 0)
+		{
+			value *= GF_UNIT_PB;
+		}
+		else 
+		{
+			/* bala: invalid integer format */
+			return -1;
+		}
+	}
+  
+	*n = value;
+  
+	return 0;
+}
+
+int64_t 
+gf_str_to_long_long (const char *number)
+{
+	int64_t unit = 1;
+	int64_t ret = 0;
+	char *endptr = NULL ;
+	if (!number)
+		return 0;
+
+	ret = strtoll (number, &endptr, 0);
+
+	if (endptr) {
+		switch (*endptr) {
+		case 'G':
+		case 'g':
+			if ((* (endptr + 1) == 'B') ||(* (endptr + 1) == 'b'))
+				unit = 1024 * 1024 * 1024;
+			break;
+		case 'M':
+		case 'm':
+			if ((* (endptr + 1) == 'B') ||(* (endptr + 1) == 'b'))
+				unit = 1024 * 1024;
+			break;
+		case 'K':
+		case 'k':
+			if ((* (endptr + 1) == 'B') ||(* (endptr + 1) == 'b'))
+				unit = 1024;
+			break;
+		case '%':
+			unit = 1;
+			break;
+		default:
+			unit = 1;
+			break;
+		}
+	}
+	return ret * unit;
+}
+
+int 
+gf_string2boolean (const char *str, gf_boolean_t *b)
+{
+	if (str == NULL) {
+		return -1;
+	}
+	
+	if ((strcasecmp (str, "1") == 0) || 
+	    (strcasecmp (str, "on") == 0) || 
+	    (strcasecmp (str, "yes") == 0) || 
+	    (strcasecmp (str, "true") == 0) || 
+	    (strcasecmp (str, "enable") == 0)) {
+		*b = _gf_true;
+		return 0;
+	}
+	
+	if ((strcasecmp (str, "0") == 0) || 
+	    (strcasecmp (str, "off") == 0) || 
+	    (strcasecmp (str, "no") == 0) || 
+	    (strcasecmp (str, "false") == 0) || 
+	    (strcasecmp (str, "disable") == 0)) {
+		*b = _gf_false;
+		return 0;
+	}
+	
+	return -1;
+}
+
+
+int 
+gf_lockfd (int fd)
+{
+	struct flock fl;
+	
+	fl.l_type = F_WRLCK;
+	fl.l_whence = SEEK_SET;
+	fl.l_start = 0;
+	fl.l_len = 0;
+	
+	return fcntl (fd, F_SETLK, &fl);
+}
+
+
+int 
+gf_unlockfd (int fd)
+{
+	struct flock fl;
+	
+	fl.l_type = F_UNLCK;
+	fl.l_whence = SEEK_SET;
+	fl.l_start = 0;
+	fl.l_len = 0;
+	
+	return fcntl (fd, F_SETLK, &fl);
+}
+