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[Cluster-devel] cluster/gfs2/mkfs main.c main_mkfs.c gfs2_mkfs ...



CVSROOT:	/cvs/cluster
Module name:	cluster
Changes by:	adas sourceware org	2006-07-10 22:51:10

Modified files:
	gfs2/mkfs      : main.c main_mkfs.c gfs2_mkfs.h Makefile 
Added files:
	gfs2/mkfs      : main_jadd.c 

Log message:
	Initial commit of gfs2_jadd. Doesn't work fully. Needs to be tested with GFS2 filesystem.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs2/mkfs/main_jadd.c.diff?cvsroot=cluster&r1=1.5&r2=1.6
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs2/mkfs/main.c.diff?cvsroot=cluster&r1=1.6&r2=1.7
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs2/mkfs/main_mkfs.c.diff?cvsroot=cluster&r1=1.7&r2=1.8
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs2/mkfs/gfs2_mkfs.h.diff?cvsroot=cluster&r1=1.7&r2=1.8
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs2/mkfs/Makefile.diff?cvsroot=cluster&r1=1.9&r2=1.10

--- cluster/gfs2/mkfs/main_jadd.c	2006/02/08 14:32:47	1.5
+++ cluster/gfs2/mkfs/main_jadd.c	2006/07/10 22:51:10	1.6
@@ -1,43 +1,106 @@
-/******************************************************************************
-*******************************************************************************
-**
-**  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
-**  Copyright (C) 2004 Red Hat, Inc.  All rights reserved.
-**
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
-**
-*******************************************************************************
-******************************************************************************/
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdint.h>
 #include <inttypes.h>
 #include <sys/types.h>
+#include <dirent.h>
 #include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/file.h>
+#include <sys/vfs.h>
+#include <sys/mount.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <time.h>
-#include <sys/ioctl.h>
-#include <sys/param.h>
 #include <errno.h>
+#include <stdarg.h>
 
-#define __user
 #include <linux/types.h>
-#include <linux/gfs2_ioctl.h>
-#include <linux/gfs2_ondisk.h>
-
+#include <linux/iflags.h>
+#include "libgfs2.h"
 #include "gfs2_mkfs.h"
 
+#define BUF_SIZE 4096
+
+static char device_name[PATH_MAX];
+static char fspath[BUF_SIZE];
+static char fsoptions[BUF_SIZE];
+static char metafs_path[BUF_SIZE];
+static char lock_table[PATH_MAX];
+static char meta_mount[PATH_MAX] = "/tmp/.gfs2meta";
+static int metafs_fd;
+static int metafs_mounted = 0; /* If metafs was already mounted */
+
+void
+make_jdata(int fd, char *value)
+{
+        int err;
+        uint32_t val;
+
+        err = ioctl(fd, IFLAGS_GET_IOC, &val);
+        if (err)
+                die("error doing get flags (%d): %s\n", err, strerror(errno));
+        if (strcmp(value, "set") == 0)
+                val |= IFLAG_JOURNAL_DATA;
+        if (strcmp(value, "clear") == 0)
+                val &= ~IFLAG_JOURNAL_DATA;
+        err = ioctl(fd, IFLAGS_SET_IOC, &val);
+        if (err)
+                die("error doing set flags (%d): %s\n", err, strerror(errno));
+}
+
+int 
+rename2system(struct gfs2_sbd *sdp, char *new_dir, char *new_name)
+{
+	char oldpath[PATH_MAX], newpath[PATH_MAX];
+	int error = 0;
+	error = snprintf(oldpath, PATH_MAX, "%s/new_inode", 
+			 metafs_path);
+	if (error >= PATH_MAX)
+		die("rename2system (1)\n");
+
+	error = snprintf(newpath, PATH_MAX, "%s/%s/%s",
+			 metafs_path, new_dir, new_name);
+	if (error >= PATH_MAX)
+		die("rename2system (2)\n");
+	
+	return rename(oldpath, newpath);
+}
+
+void
+lock_for_admin(struct gfs2_sbd *sdp)
+{
+        int error;
+
+        if (sdp->debug)
+                printf("\nTrying to get admin lock...\n");
+
+        for (;;) {
+
+                metafs_fd = open(metafs_path, O_RDONLY | O_NOFOLLOW);
+                if (metafs_fd < 0)
+                        die("can't open %s: %s\n",
+                            metafs_path, strerror(errno));
+
+                error = flock(metafs_fd, LOCK_EX);
+                if (error)
+                        die("can't flock %s: %s\n", metafs_path,
+                            strerror(errno));
+
+                break;
+        }
+
+        if (sdp->debug)
+                printf("Got it.\n");
+}
+
 /**
  * print_usage - print out usage information
  *
  */
 
-static void
+static void 
 print_usage(void)
 {
 	printf("Usage:\n");
@@ -46,15 +109,14 @@
 	printf("\n");
 	printf("Options:\n");
 	printf("\n");
-	printf("  -c <MB>          Size of quota change file\n");
-	printf("  -D               Enable debugging code\n");
-	printf("  -h               Print this help, then exit\n");
-	printf("  -J <MB>          Size of journals\n");
-	printf("  -j <num>         Number of journals\n");
-	printf("  -q               Don't print anything\n");
-	printf("  -T               Test, do everything except update FS\n");
-	printf("  -u <MB>          Size of unlinked file\n");
-	printf("  -V               Print program version information, then exit\n");
+	printf("  -c <MB>           Size of quota change file\n");
+	printf("  -D                Enable debugging code\n");
+	printf("  -h                Print this help, then exit\n");
+	printf("  -J <MB>           Size of journals\n");
+	printf("  -j <num>          Number of journals\n");
+	printf("  -q                Don't print anything\n");
+	printf("  -T                Test, do everything except update FS\n");
+	printf("  -V                Print program version information, then exit\n");
 }
 
 /**
@@ -70,65 +132,50 @@
 {
 	int cont = TRUE;
 	int optchar;
-
+	
 	while (cont) {
 		optchar = getopt(argc, argv, "c:DhJ:j:qTu:VX");
-
+		
 		switch (optchar) {
 		case 'c':
 			sdp->qcsize = atoi(optarg);
 			break;
-
 		case 'D':
 			sdp->debug = TRUE;
 			break;
-
 		case 'h':
 			print_usage();
 			exit(EXIT_SUCCESS);
 			break;
-
 		case 'J':
 			sdp->jsize = atoi(optarg);
 			break;
-
 		case 'j':
-			sdp->journals = atoi(optarg);
+			sdp->md.journals = atoi(optarg);
 			break;
-
 		case 'q':
 			sdp->quiet = TRUE;
 			break;
-
 		case 'T':
 			sdp->test = TRUE;
 			break;
-
-		case 'u':
-			sdp->utsize = atoi(optarg);
-			break;
-
 		case 'V':
-			printf("gfs2_grow %s (built %s %s)\n", GFS2_RELEASE_NAME,
+			printf("gfs2_jadd %s (built %s %s)\n", GFS2_RELEASE_NAME,
 			       __DATE__, __TIME__);
 			printf("%s\n", REDHAT_COPYRIGHT);
 			exit(EXIT_SUCCESS);
 			break;
-
 		case 'X':
 			sdp->expert = TRUE;
 			break;
-
 		case ':':
 		case '?':
 			fprintf(stderr, "Please use '-h' for usage.\n");
 			exit(EXIT_FAILURE);
 			break;
-
 		case EOF:
 			cont = FALSE;
 			break;
-
 		default:
 			die("unknown option: %c\n", optchar);
 			break;
@@ -140,7 +187,7 @@
 		optind++;
 	} else
 		die("no path specified (try -h for help)\n");
-
+	
 	if (optind < argc)
 		die("Unrecognized option: %s\n", argv[optind]);
 
@@ -148,26 +195,20 @@
 		printf("Command Line Arguments:\n");
 		printf("  qcsize = %u\n", sdp->qcsize);
 		printf("  jsize = %u\n", sdp->jsize);
-		printf("  journals = %u\n", sdp->journals);
+		printf("  journals = %u\n", sdp->md.journals);
 		printf("  quiet = %d\n", sdp->quiet);
 		printf("  test = %d\n", sdp->test);
-		printf("  utsize = %u\n", sdp->utsize);
 		printf("  path = %s\n", sdp->path_name);
 	}
 }
 
-static void
+static void 
 verify_arguments(struct gfs2_sbd *sdp)
 {
-	if (!sdp->journals)
+	if (!sdp->md.journals)
 		die("no journals specified\n");
-
-	if (sdp->jsize < 8 || sdp->jsize > 1024)
+	if (sdp->jsize < 32 || sdp->jsize > 1024)
 		die("bad journal size\n");
-
-	if (!sdp->utsize || sdp->utsize > 64)
-		die("bad unlinked size\n");
-
 	if (!sdp->qcsize || sdp->qcsize > 64)
 		die("bad quota change size\n");
 }
@@ -178,7 +219,7 @@
  *
  */
 
-static void
+static void 
 print_results(struct gfs2_sbd *sdp)
 {
 	if (sdp->debug)
@@ -187,26 +228,26 @@
 		return;
 
 	if (sdp->test)
-		printf("Test mode:                 on\n");
+		printf("Test mode:              on\n");
 	if (sdp->expert)
-		printf("Expert mode:               on\n");
+		printf("Expert mode:            on\n");
 
-	printf("Filesystem:                %s\n", sdp->path_name);
-	printf("Old Journals               %u\n", sdp->orig_journals);
-	printf("New Journals               %u\n", sdp->journals);
+	printf("Filesystem:            %s\n", sdp->path_name);
+	printf("Old Journals           %u\n", sdp->orig_journals);
+	printf("New Journals           %u\n", sdp->md.journals);
 
 	if (sdp->test)
 		printf("\nThe filesystem was not modified.\n");
 }
 
-int
+int 
 create_new_inode(struct gfs2_sbd *sdp)
 {
 	char name[PATH_MAX];
 	int fd;
 	int error;
 
-	error = snprintf(name, PATH_MAX, "%s/.gfs2_admin/new_inode", sdp->path_name);
+	error = snprintf(name, PATH_MAX, "%s/new_inode", metafs_path);
 	if (error >= PATH_MAX)
 		die("create_new_inode (1)\n");
 
@@ -220,14 +261,13 @@
 				die("can't unlink %s: %s\n",
 				    name, strerror(errno));
 		} else
-			die("can't create %s: %s\n",
-			    name, strerror(errno));
+			die("can't create %s: %s\n", name, strerror(errno));
 	}
-
+	
 	return fd;
 }
 
-void
+void 
 add_ir(struct gfs2_sbd *sdp)
 {
 	int fd;
@@ -238,57 +278,48 @@
 
 	{
 		struct gfs2_inum_range ir;
-
 		make_jdata(fd, "set");
-
 		memset(&ir, 0, sizeof(struct gfs2_inum_range));
-		error = write(fd, &ir, sizeof(struct gfs2_inum_range));
-		if (error != sizeof(struct gfs2_inum_range))
-			die("can't write to new_inode (%d): %s\n",
-			    error, strerror(errno));
+		do_write(fd, (void*)&ir, sizeof(struct gfs2_inum_range));
 	}
 
 	close(fd);
-
-	sprintf(new_name, "inum_range%u", sdp->journals);
+	
+	sprintf(new_name, "inum_range%u", sdp->md.journals);
 	error = rename2system(sdp, "per_node", new_name);
 	if (error < 0 && errno != EEXIST)
-		die("can't rename2system %s (%d): %s\n",
+		die("can't rename2system %s (%d): %s\n", 
 		    new_name, error, strerror(errno));
 }
 
-void
+void 
 add_sc(struct gfs2_sbd *sdp)
 {
 	int fd;
 	char new_name[256];
 	int error;
-
+	
 	fd = create_new_inode(sdp);
-
+	
 	{
 		struct gfs2_statfs_change sc;
-
 		make_jdata(fd, "set");
 
 		memset(&sc, 0, sizeof(struct gfs2_statfs_change));
-		error = write(fd, &sc, sizeof(struct gfs2_statfs_change));
-		if (error != sizeof(struct gfs2_statfs_change))
-			die("can't write to new_inode (%d): %s\n",
-			    error, strerror(errno));
+		do_write(fd, (void*)&sc, sizeof(struct gfs2_statfs_change));
 	}
 
 	close(fd);
-
-	sprintf(new_name, "statfs_change%u", sdp->journals);
+	
+	sprintf(new_name, "statfs_change%u", sdp->md.journals);
 	error = rename2system(sdp, "per_node", new_name);
 	if (error < 0 && errno != EEXIST)
 		die("can't rename2system %s (%d): %s\n",
 		    new_name, error, strerror(errno));
 }
 
-void
-add_ut(struct gfs2_sbd *sdp)
+void 
+add_qc(struct gfs2_sbd *sdp)
 {
 	int fd;
 	char new_name[256];
@@ -298,37 +329,27 @@
 
 	{
 		char buf[sdp->bsize];
-		unsigned int blocks = sdp->utsize << (20 - sdp->bsize_shift);
+		unsigned int blocks = sdp->qcsize << (20 - sdp->bsize_shift);
 		unsigned int x;
 		struct gfs2_meta_header mh;
 
 		make_jdata(fd, "clear");
-
 		memset(buf, 0, sdp->bsize);
 
-		for (x = 0; x < blocks; x++) {
-			error = write(fd, buf, sdp->bsize);
-			if (error != sdp->bsize)
-				die("can't write to new_inode (%d): %s\n",
-				    error, strerror(errno));
+		for (x=0; x<blocks; x++) {
+			do_write(fd, buf, sdp->bsize);
 		}
 
-		error = lseek(fd, 0, SEEK_SET);
-		if (error)
-			die("can't lseek: %s\n", strerror(errno));
-
+		do_lseek(fd, 0);
+		
 		memset(&mh, 0, sizeof(struct gfs2_meta_header));
 		mh.mh_magic = GFS2_MAGIC;
-		mh.mh_type = GFS2_METATYPE_UT;
-		mh.mh_format = GFS2_FORMAT_UT;
-
-		for (x = 0; x < blocks; x++) {
-			gfs2_meta_header_out(&mh, buf);
+		mh.mh_type = GFS2_METATYPE_QC;
+		mh.mh_format = GFS2_FORMAT_QC;
+		gfs2_meta_header_out(&mh, buf);
 
-			error = write(fd, buf, sdp->bsize);
-			if (error != sdp->bsize)
-				die("can't write to new_inode (%d): %s\n",
-				    error, strerror(errno));
+		for (x=0; x<blocks; x++) {
+			do_write(fd, buf, sdp->bsize);
 		}
 
 		error = fsync(fd);
@@ -338,74 +359,88 @@
 	}
 
 	close(fd);
-
-	sprintf(new_name, "unlinked_tag%u", sdp->journals);
+	
+	sprintf(new_name, "quota_change%u", sdp->md.journals);
 	error = rename2system(sdp, "per_node", new_name);
 	if (error < 0 && errno != EEXIST)
 		die("can't rename2system %s (%d): %s\n",
 		    new_name, error, strerror(errno));
 }
 
-void
-add_qc(struct gfs2_sbd *sdp)
+#if 0 /* FIXME: When we have a mountpoint in sysfs for gfs2meta, enable this 
+       * to get the lock_table name and block size from the ondisk superblock
+       */
+void 
+read_superblock(struct gfs2_sbd *sdp)
 {
 	int fd;
-	char new_name[256];
-	int error;
-
-	fd = create_new_inode(sdp);
-
-	{
-		char buf[sdp->bsize];
-		unsigned int blocks = sdp->qcsize << (20 - sdp->bsize_shift);
-		unsigned int x;
-		struct gfs2_meta_header mh;
-
-		make_jdata(fd, "clear");
-
-		memset(buf, 0, sdp->bsize);
-
-		for (x = 0; x < blocks; x++) {
-			error = write(fd, buf, sdp->bsize);
-			if (error != sdp->bsize)
-				die("can't write to new_inode (%d): %s\n",
-				    error, strerror(errno));
-		}
-
-		error = lseek(fd, 0, SEEK_SET);
-		if (error)
-			die("can't lseek: %s\n", strerror(errno));
-
-		memset(&mh, 0, sizeof(struct gfs2_meta_header));
-		mh.mh_magic = GFS2_MAGIC;
-		mh.mh_type = GFS2_METATYPE_QC;
-		mh.mh_format = GFS2_FORMAT_QC;
-
-		for (x = 0; x < blocks; x++) {
-			gfs2_meta_header_out(&mh, buf);
+	char buf[PATH_MAX];
+	
+	fd = open(sdp->device_name, O_RDONLY);
+	if (fd < 0) {
+		die("Could not open the block device %s: %s\n",
+			sdp->device_name, strerror(errno));
+	}
+	do_lseek(fd, 0x10 * 4096);
+	do_read(fd, buf, 4096);
+	gfs2_sb_in(&(sdp->sd_sb), buf);
+	sdp->bsize = sdp->sd_sb.sb_bsize;
+	strcpy(lock_table,sdp->sd_sb.sb_locktable);
+	sprintf(meta_mount, "%s%s%s", "/sys/fs/gfs2/", lock_table, "/meta");
 
-			error = write(fd, buf, sdp->bsize);
-			if (error != sdp->bsize)
-				die("can't write to new_inode (%d): %s\n",
-				    error, strerror(errno));
-		}
+	close(fd);
+}
 
-		error = fsync(fd);
-		if (error)
-			die("can't fsync: %s\n",
-			    strerror(errno));
+void 
+gather_info(struct gfs2_sbd *sdp)
+{
+	read_superblock(sdp);
+}
+#else
+void 
+gather_info(struct gfs2_sbd *sdp)
+{
+	struct statfs statbuf;
+	if (statfs(sdp->path_name, &statbuf) < 0) {
+		die("Could not statfs the filesystem %s: %s\n",
+		    sdp->path_name, strerror(errno));
 	}
+	sdp->bsize = statbuf.f_bsize;
+}
+#endif 
 
-	close(fd);
+void 
+find_current_journals(struct gfs2_sbd *sdp)
+{
+	char jindex[PATH_MAX];
+	struct dirent *dp;
+	DIR *dirp;
+	int existing_journals = 0;
+
+	sprintf(jindex, "%s/jindex", metafs_path);
+	dirp = opendir(jindex);
+	if (!dirp) {
+		die("Could not find the jindex directory "
+		    "in gfs2meta mount! error: %s\n", strerror(errno));
+	}
+	while (dirp) {
+		if ((dp = readdir(dirp)) != NULL) {
+			if (strncmp(dp->d_name, "journal", 7) == 0)
+				existing_journals++;
+		} else
+			goto close;
+	}
+close:
+	closedir(dirp);
+	if (existing_journals <= 0) {
+		die("There are no journals for this "
+		    "gfs2 fs! Did you mkfs.gfs2 correctly?\n");
+	}
 
-	sprintf(new_name, "quota_change%u", sdp->journals);
-	error = rename2system(sdp, "per_node", new_name);
-	if (error < 0 && errno != EEXIST)
-		die("can't rename2system %s (%d): %s\n",
-		    new_name, error, strerror(errno));
+	sdp->orig_journals = existing_journals;
 }
 
-void
+void 
 add_j(struct gfs2_sbd *sdp)
 {
 	int fd;
@@ -422,19 +457,12 @@
 		uint64_t seq = RANDOM(blocks);
 
 		make_jdata(fd, "clear");
-
 		memset(buf, 0, sdp->bsize);
-
-		for (x = 0; x < blocks; x++) {
-			error = write(fd, buf, sdp->bsize);
-			if (error != sdp->bsize)
-				die("can't write to new_inode (%d): %s\n",
-				    error, strerror(errno));
+		for (x=0; x<blocks; x++) {
+			do_write(fd, buf, sdp->bsize);
 		}
 
-		error = lseek(fd, 0, SEEK_SET);
-		if (error)
-			die("can't lseek: %s\n", strerror(errno));
+		do_lseek(fd, 0);
 
 		memset(&lh, 0, sizeof(struct gfs2_log_header));
 		lh.lh_header.mh_magic = GFS2_MAGIC;
@@ -442,19 +470,16 @@
 		lh.lh_header.mh_format = GFS2_FORMAT_LH;
 		lh.lh_flags = GFS2_LOG_HEAD_UNMOUNT;
 
-		for (x = 0; x < blocks; x++) {
+		for (x=0; x<blocks; x++) {
 			uint32_t hash;
 
 			lh.lh_sequence = seq;
 			lh.lh_blkno = x;
 			gfs2_log_header_out(&lh, buf);
 			hash = gfs2_disk_hash(buf, sizeof(struct gfs2_log_header));
-			((struct gfs2_log_header *)buf)->lh_hash = cpu_to_be32(hash);
+			((struct gfs2_log_header *)buf)->lh_hash = cpu_to_le32(hash);
 
-			error = write(fd, buf, sdp->bsize);
-			if (error != sdp->bsize)
-				die("can't write to new_inode (%d): %s\n",
-				    error, strerror(errno));
+			do_write(fd, buf, sdp->bsize);
 
 			if (++seq == blocks)
 				seq = 0;
@@ -467,14 +492,148 @@
 	}
 
 	close(fd);
-
-	sprintf(new_name, "journal%u", sdp->journals);
+	
+	sprintf(new_name, "journal%u", sdp->md.journals);
 	error = rename2system(sdp, "jindex", new_name);
 	if (error < 0 && errno != EEXIST)
 		die("can't rename2system %s (%d): %s\n",
 		    new_name, error, strerror(errno));
 }
 
+static int 
+find_gfs2_meta(struct gfs2_sbd *sdp)
+{
+	FILE *fp = fopen("/proc/mounts", "r");
+	char name[] = "gfs2meta";
+	char buffer[BUF_SIZE];
+	char fstype[80], mfsoptions[BUF_SIZE];
+	char meta_device[BUF_SIZE];
+	int fsdump, fspass;
+
+	if (fp == NULL) {
+		perror("open: /proc/mounts");
+		exit(EXIT_FAILURE);
+	}
+	while ((fgets(buffer, 4095, fp)) != NULL) {
+		buffer[4095] = 0;
+		if (strstr(buffer, name) == 0)
+			continue;
+
+		if (sscanf(buffer, "%s %s %s %s %d %d", meta_device, 
+			   metafs_path, fstype,mfsoptions, &fsdump, 
+			   &fspass) != 6)
+			continue;
+		
+		if (strcmp(meta_device, sdp->device_name) != 0)
+			continue;
+		
+		metafs_mounted = 1;
+		
+		fclose(fp);
+		return TRUE;
+	}
+	fclose(fp);
+	return FALSE;
+}
+
+static int
+dir_exists(const char *dir)
+{
+	int fd, ret;
+	struct stat statbuf;
+	fd = open(dir, O_RDONLY);
+	if (fd<0) { 
+		if (errno == ENOENT)
+			return 0;
+		die("Couldn't open %s : %s\n", dir, strerror(errno));
+	}
+	ret = fstat(fd, &statbuf);
+	if (ret)
+		die("stat failed on %s : %s\n", dir, strerror(errno));
+	if (S_ISDIR(statbuf.st_mode)) {
+		close(fd);
+		return 1;
+	}
+	close(fd);
+	die("%s exists, but is not a directory. Cannot mount metafs here\n", dir);
+}
+
+static void 
+mount_gfs2_meta(struct gfs2_sbd *sdp) 	 
+{
+	int ret;
+	/* mount the meta fs */
+	fprintf(stderr, "mount %s %s %s %d\n", sdp->device_name,
+		meta_mount, "gfs2_meta", 0);
+	if (!dir_exists(meta_mount)) {
+		ret = mkdir(meta_mount, 0700);
+		if (ret)
+			die("Couldn't create %s : %s\n", meta_mount,
+			    strerror(errno));
+	}
+		
+	ret = mount(sdp->device_name, meta_mount, "gfs2meta", 0, NULL);
+	if (ret)
+		die("Couldn't mount %s : %s\n", meta_mount,
+		    strerror(errno));
+	strcpy(metafs_path, meta_mount);
+}
+
+static void
+check_for_gfs2(struct gfs2_sbd *sdp)
+{
+	FILE *fp = fopen("/proc/mounts", "r");
+	char *name = sdp->path_name;
+	char buffer[BUF_SIZE];
+	char fstype[80];
+	int fsdump, fspass, ret;
+
+	if (name[strlen(name) - 1] == '/')
+		name[strlen(name) - 1] = '\0';
+
+	if (fp == NULL) {
+		perror("open: /proc/mounts");
+		exit(EXIT_FAILURE);
+	}
+	while ((fgets(buffer, 4095, fp)) != NULL) {
+		buffer[4095] = 0;
+
+		if (strstr(buffer, "0") == 0)
+			continue;
+
+		if ((ret = sscanf(buffer, "%s %s %s %s %d %d", device_name, fspath, 
+				  fstype, fsoptions, &fsdump, &fspass)) != 6) 
+			continue;
+		sdp->device_name = device_name;
+
+		if (strcmp(fstype, "gfs2") != 0)
+			continue;
+
+		if (strcmp(fspath, name) != 0)
+			continue;
+
+		fclose(fp);
+		if (strncmp(device_name, "/dev/loop", 9) == 0)
+			die("Cannot add journal(s) to a loopback GFS mount\n");
+
+		return;
+	}
+	fclose(fp);
+	die("gfs2 Filesystem %s not found\n", name);
+}
+
+static void
+cleanup(struct gfs2_sbd *sdp)
+{
+	int ret;
+	if (!metafs_mounted) { /* was mounted by us */
+		ret = umount(meta_mount);
+		if (ret)
+			fprintf(stderr, "Couldn't unmount %s : %s\n", meta_mount, 
+			    strerror(errno));
+	}
+}
+
 /**
  * main_jadd - do everything
  * @argc:
@@ -482,45 +641,50 @@
  *
  */
 
-void
+void 
 main_jadd(int argc, char *argv[])
 {
 	struct gfs2_sbd sbd, *sdp = &sbd;
 	unsigned int total;
 
 	memset(sdp, 0, sizeof(struct gfs2_sbd));
-	sdp->jsize = MKFS_DEFAULT_JSIZE;
-	sdp->utsize = MKFS_DEFAULT_UTSIZE;
-	sdp->qcsize = MKFS_DEFAULT_QCSIZE;
+	sdp->jsize = GFS2_DEFAULT_JSIZE;
+	sdp->qcsize = GFS2_DEFAULT_QCSIZE;
+	sdp->md.journals = 1;
 
 	decode_arguments(argc, argv, sdp);
 	verify_arguments(sdp);
-
+	
 	sdp->path_fd = open(sdp->path_name, O_RDONLY);
 	if (sdp->path_fd < 0)
 		die("can't open root directory %s: %s\n",
 		    sdp->path_name, strerror(errno));
 
 	check_for_gfs2(sdp);
-	lock_for_admin(sdp);
 
-	find_block_size(sdp);
+	gather_info(sdp);
+	if (!find_gfs2_meta(sdp))
+		mount_gfs2_meta(sdp);
+	lock_for_admin(sdp);
+	
 	compute_constants(sdp);
 	find_current_journals(sdp);
 
-	total = sdp->orig_journals + sdp->journals;
-	for (sdp->journals = sdp->orig_journals;
-	     sdp->journals < total;
-	     sdp->journals++) {
+	total = sdp->orig_journals + sdp->md.journals;
+	for (sdp->md.journals = sdp->orig_journals; 
+	     sdp->md.journals < total;
+	     sdp->md.journals++) {
 		add_ir(sdp);
 		add_sc(sdp);
-		add_ut(sdp);
 		add_qc(sdp);
 		add_j(sdp);
 	}
 
+	close(metafs_fd);
 	close(sdp->path_fd);
 
+	cleanup(sdp);
+
 	sync();
 
 	print_results(sdp);
--- cluster/gfs2/mkfs/main.c	2006/02/08 14:32:47	1.6
+++ cluster/gfs2/mkfs/main.c	2006/07/10 22:51:10	1.7
@@ -25,6 +25,7 @@
 #include <libgen.h>
 
 #include <linux/types.h>
+#include "libgfs2.h"
 #include "gfs2_mkfs.h"
 
 char *prog_name;
@@ -47,15 +48,14 @@
 
 	p = strdup(prog_name);
 	whoami = basename(p);
-#if 0
-	if (!strcmp(whoami, "gfs2_grow"))
-		main_grow(argc, argv);
-	else if (!strcmp(whoami, "gfs2_jadd"))
+	
+	if (!strcmp(whoami, "gfs2_jadd"))
 		main_jadd(argc, argv);
 	else if (!strcmp(whoami, "gfs2_mkfs") || !strcmp(whoami, "mkfs.gfs2"))
-#endif
 		main_mkfs(argc, argv);
 #if 0
+	if (!strcmp(whoami, "gfs2_grow"))
+		main_grow(argc, argv);
 	else if (!strcmp(whoami, "gfs2_shrink"))
 		main_shrink(argc, argv);
 	else
--- cluster/gfs2/mkfs/main_mkfs.c	2006/06/27 21:04:13	1.7
+++ cluster/gfs2/mkfs/main_mkfs.c	2006/07/10 22:51:10	1.8
@@ -25,8 +25,8 @@
 #include <stdarg.h>
 
 #include <linux/types.h>
-#include "gfs2_mkfs.h"
 #include "libgfs2.h"
+#include "gfs2_mkfs.h"
 #include "libvolume_id.h"
 
 char *prog_name;
--- cluster/gfs2/mkfs/gfs2_mkfs.h	2006/05/15 20:27:03	1.7
+++ cluster/gfs2/mkfs/gfs2_mkfs.h	2006/07/10 22:51:10	1.8
@@ -35,4 +35,44 @@
 /* main_shrink */
 void main_shrink(int argc, char *argv[]);
 
+static inline int __do_read(int fd, char *buff, size_t len, 
+			    const char *file, int line)
+{
+	int ret = read(fd, buff, len);
+	if (ret < 0) {
+		die("bad read: %s on line %d of file %s\n", 
+		    strerror(errno), line, file);
+	}
+	return ret;
+}
+
+#define do_read(fd, buf, len) \
+	__do_read((fd), (buf), (len), __FILE__, __LINE__)
+
+static inline int __do_write(int fd, char *buff, size_t len,
+			     const char *file, int line)
+{
+	int ret = write(fd, buff, len);
+	if (ret != len) {
+		die("bad write: %s on line %d of file %s\n",
+		    strerror(errno), line, file);
+	}
+	return ret;
+}
+
+#define do_write(fd, buf, len) \
+	__do_write((fd), (buf), (len), __FILE__, __LINE__)
+
+static inline int __do_lseek(int fd, off_t off, const char *file, int line)
+{
+	if (lseek(fd, off, SEEK_SET) != off) {
+		die("bad seek: %s on line %d of file %s\n",
+		    strerror(errno), line, file);
+	}
+	return 0;
+}
+
+#define do_lseek(fd, off) \
+	__do_lseek((fd), (off), __FILE__, __LINE__)
+
 #endif /* __GFS2_MKFS_DOT_H__ */
--- cluster/gfs2/mkfs/Makefile	2006/06/27 21:04:13	1.9
+++ cluster/gfs2/mkfs/Makefile	2006/07/10 22:51:10	1.10
@@ -1,13 +1,14 @@
 #
 # Makefile for GFS2 mkfs
 #
-.PHONY: all clean install
+.PHONY: all clean install copytobin
 
 top_srcdir=..
 
 include ${top_srcdir}/make/defines.mk
 
 MKFS=mkfs.gfs2
+JADD=gfs2_jadd
 INSTALLPATH=/sbin
 INCLUDEPATH=-I${KERNEL_SRC}/include/ -I${top_srcdir}/include/ -I${top_srcdir}/libgfs2/ -I${top_srcdir}/config/
 
@@ -19,23 +20,28 @@
 LDFLAGS=-L${top_srcdir}/libgfs2 -L${libdir}
 
 H=gfs2_disk_hash.h gfs2_mkfs.h linux_endian.h ondisk.h osi_list.h
-C=main.c main_mkfs.c
+C=main.c main_mkfs.c main_jadd.c
 O=$(subst .c,.o,${C})
 
-all: ${MKFS}
+all: ${MKFS} ${JADD}
 
 ${MKFS}: ${O}
 	${LD} ${LDFLAGS} ${O} -o ${ } -lgfs2 -lvolume_id
 
+${JADD}: ${MKFS}
+	ln -s ${MKFS} ${JADD}
+
 .c.o: $<
 	${CC} ${CFLAGS} -o $@ $^
 
 copytobin: ${MKFS}
 	cp ${MKFS} ${top_srcdir}/bin
+	ln -sf ${MKFS} ${top_srcdir}/bin/${JADD}
 
 install: ${MKFS}
 	${INSTALL} -m 0755 -g root -o root ${MKFS} ${INSTALLPATH}
+	ln -sf ${MKFS} ${INSTALLPATH}/${JADD}
 
 clean:
-	rm -f *.o ${MKFS}
+	rm -f *.o ${MKFS} ${JADD}
 


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