From 39c9a9613396d4bcdbf75d88726bdd980f75c822 Mon Sep 17 00:00:00 2001
From: Packit <packit>
Date: Sep 04 2020 09:57:38 +0000
Subject: Apply patch bz1833141-1-gfs2_jadd_Handle_out_of_space_issues.patch


patch_name: bz1833141-1-gfs2_jadd_Handle_out_of_space_issues.patch
present_in_specfile: true

---

diff --git a/gfs2/mkfs/main_jadd.c b/gfs2/mkfs/main_jadd.c
index efe91e3..c542480 100644
--- a/gfs2/mkfs/main_jadd.c
+++ b/gfs2/mkfs/main_jadd.c
@@ -396,6 +396,8 @@ static void gather_info(struct gfs2_sbd *sdp, struct jadd_opts *opts)
 		exit(EXIT_FAILURE);
 	}
 	sdp->bsize = statbuf.f_bsize;
+	sdp->blks_total = statbuf.f_blocks;
+	sdp->blks_alloced = sdp->blks_total - statbuf.f_bfree;
 }
 
 static void find_current_journals(struct jadd_opts *opts)
@@ -527,13 +529,43 @@ static void add_j(struct gfs2_sbd *sdp, struct jadd_opts *opts)
 	}
 }
 
+static int check_fit(struct gfs2_sbd *sdp, struct jadd_opts *opts)
+{
+	/* Compute how much space we'll need for the new journals
+	 * Number of blocks needed per added journal:
+	 * 1 block for the ir inode
+	 * 1 block for the sc inode
+	 * for sizes of the qc and journal inodes, use lgfs2_space_for_data()
+	 * to calculate.
+	 */
+	uint64_t blks_per_j, total_blks;
+
+	blks_per_j = 1 + 1 +
+		lgfs2_space_for_data(sdp, sdp->bsize, sdp->qcsize << 20) +
+		lgfs2_space_for_data(sdp, sdp->bsize, sdp->jsize << 20);
+	total_blks = opts->journals * blks_per_j;
+
+	if (total_blks > (sdp->blks_total - sdp->blks_alloced)) {
+		printf( _("\nInsufficient space on the device to add %u %uMB "
+			  "journals (%uMB QC size)\n\n"),
+			opts->journals, sdp->jsize, sdp->qcsize);
+		printf( _("Required space  : %*lu blks (%lu blks per "
+			  "journal)\n"), 10, total_blks, blks_per_j);
+		printf( _("Available space : %*lu blks\n\n"), 10,
+			sdp->blks_total - sdp->blks_alloced);
+		errno = ENOSPC;
+		return 1;
+	}
+	return 0;
+}
+
 int main(int argc, char *argv[])
 {
 	struct jadd_opts opts = {0};
 	struct gfs2_sbd sbd, *sdp = &sbd;
 	struct metafs mfs = {0};
 	struct mntent *mnt;
-	unsigned int total;
+	unsigned int total, ret = 0;
 
 	setlocale(LC_ALL, "");
 	textdomain("gfs2-utils");
@@ -574,6 +606,12 @@ int main(int argc, char *argv[])
 	}
 	find_current_journals(&opts);
 
+	ret = check_fit(sdp, &opts);
+	if (ret) {
+		perror(_("Failed to add journals"));
+		goto out;
+	}
+
 	total = opts.orig_journals + opts.journals;
 	for (opts.journals = opts.orig_journals;
 	     opts.journals < total;
@@ -588,13 +626,16 @@ int main(int argc, char *argv[])
 		add_j(sdp, &opts);
 	}
 
+out:
 	free(opts.new_inode);
 	free(opts.per_node);
 	free(opts.jindex);
 	close(sdp->path_fd);
 	cleanup_metafs(&mfs);
 	sync();
-	print_results(&opts);
 
-	return 0;
+	if (!ret)
+		print_results(&opts);
+
+	return ret;
 }
diff --git a/gfs2/mkfs/main_jadd.c.bz1833141-1-gfs2_jadd_Handle_out_of_space_issues b/gfs2/mkfs/main_jadd.c.bz1833141-1-gfs2_jadd_Handle_out_of_space_issues
new file mode 100644
index 0000000..efe91e3
--- /dev/null
+++ b/gfs2/mkfs/main_jadd.c.bz1833141-1-gfs2_jadd_Handle_out_of_space_issues
@@ -0,0 +1,600 @@
+#include "clusterautoconfig.h"
+
+#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/vfs.h>
+#include <sys/mount.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <time.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <libintl.h>
+#include <locale.h>
+#define _(String) gettext(String)
+
+#include <linux/types.h>
+#include <linux/fiemap.h>
+#include <linux/fs.h>
+#include "libgfs2.h"
+#include "gfs2_mkfs.h"
+#include "metafs.h"
+
+#define RANDOM(values) ((values) * (random() / (RAND_MAX + 1.0)))
+
+struct jadd_opts {
+	char *path;
+	char *new_inode;
+	char *per_node;
+	char *jindex;
+	unsigned orig_journals;
+	unsigned journals;
+	unsigned quiet:1;
+	unsigned debug:1;
+};
+
+#define JA_FL_SET   0
+#define JA_FL_CLEAR 1
+static void set_flags(int fd, int op, uint32_t flags)
+{
+        int err;
+	uint32_t val;
+
+        err = ioctl(fd, FS_IOC_GETFLAGS, &val);
+        if (err) {
+		perror("GETFLAGS");
+		exit(EXIT_FAILURE);
+	}
+
+        if (op == JA_FL_SET)
+                val |= flags;
+        else if (op == JA_FL_CLEAR)
+                val &= ~flags;
+
+        err = ioctl(fd, FS_IOC_SETFLAGS, &val);
+        if (err) {
+		perror("SETFLAGS");
+		exit(EXIT_FAILURE);
+	}
+}
+
+static int rename2system(struct jadd_opts *opts, const char *new_dir, const char *new_name)
+{
+	char *newpath;
+	int ret;
+
+	if (asprintf(&newpath, "%s/%s", new_dir, new_name) < 0) {
+		perror(_("Failed to allocate new path"));
+		return -1;
+	}
+
+	ret = rename(opts->new_inode, newpath);
+	free(newpath);
+	return ret;
+}
+
+static int build_paths(const char *metafs_path, struct jadd_opts *opts)
+{
+	int i = 0;
+	struct {
+		char **path;
+		const char *tail;
+	} p[] = {
+		{ &opts->new_inode, "new_inode" },
+		{ &opts->per_node, "per_node" },
+		{ &opts->jindex, "jindex" },
+		{ NULL, NULL}
+	};
+
+	while (p[i].path != NULL) {
+		if (asprintf(p[i].path, "%s/%s", metafs_path, p[i].tail) < 0) {
+			while (i > 0)
+				free(*p[--i].path);
+			return 1;
+		}
+		if (opts->debug)
+			printf("%d: %s\n", i, *p[i].path);
+		i++;
+	}
+	return 0;
+}
+
+/**
+ * print_usage - print out usage information
+ * @prog_name: The name of this program
+ */
+
+static void print_usage(const char *prog_name)
+{
+	int i;
+	const char *option, *param, *desc;
+	const char *options[] = {
+		/* Translators: This is a usage string printed with --help.
+		   <size> and <number> here are the commandline parameters,
+		   e.g. gfs2_jadd -j <number> /dev/sda */
+		"-c", "<size>",   _("Size of quota change file, in megabytes"),
+		"-D", NULL,       _("Enable debugging code"),
+		"-h", NULL,       _("Display this help, then exit"),
+		"-J", "<size>",   _("Size of journals, in megabytes"),
+		"-j", "<number>", _("Number of journals"),
+		"-q", NULL,       _("Don't print anything"),
+		"-V", NULL,       _("Display version information, then exit"),
+		NULL, NULL, NULL /* Must be kept at the end */
+	};
+
+	printf("%s\n", _("Usage:"));
+	printf("%s [%s] <%s>\n\n", prog_name, _("options"), _("device"));
+	printf(_("Adds journals to a GFS2 file system."));
+	printf("\n\n%s\n", _("Options:"));
+
+	for (i = 0; options[i] != NULL; i += 3) {
+		option = options[i];
+		param = options[i+1];
+		desc = options[i+2];
+		printf("%3s %-15s %s\n", option, param ? param : "", desc);
+	}
+}
+
+/**
+ * decode_arguments - decode command line arguments and fill in the struct gfs2_sbd
+ * @argc:
+ * @argv:
+ * @sdp: the decoded command line arguments
+ *
+ */
+
+static void decode_arguments(int argc, char *argv[], struct gfs2_sbd *sdp, struct jadd_opts *opts)
+{
+	int cont = TRUE;
+	int optchar;
+
+	while (cont) {
+		optchar = getopt(argc, argv, "c:DhJ:j:qu:V");
+
+		switch (optchar) {
+		case 'c':
+			sdp->qcsize = atoi(optarg);
+			break;
+		case 'D':
+			opts->debug = 1;
+			lgfs2_set_debug(1);
+			break;
+		case 'h':
+			print_usage(argv[0]);
+			exit(0);
+			break;
+		case 'J':
+			sdp->jsize = atoi(optarg);
+			break;
+		case 'j':
+			opts->journals = atoi(optarg);
+			break;
+		case 'q':
+			opts->quiet = 1;
+			break;
+		case 'V':
+			printf("gfs2_jadd %s (built %s %s)\n", VERSION,
+			       __DATE__, __TIME__);
+			printf(REDHAT_COPYRIGHT "\n");
+			exit(0);
+			break;
+		case ':':
+		case '?':
+			fprintf(stderr, _("Please use '-h' for help.\n"));
+			exit(EXIT_FAILURE);
+			break;
+		case EOF:
+			cont = FALSE;
+			break;
+		default:
+			die( _("Invalid option: %c\n"), optchar);
+			break;
+		};
+	}
+
+	if (optind < argc) {
+		opts->path = argv[optind];
+		optind++;
+	} else
+		die( _("no path specified (try -h for help)\n"));
+
+	if (optind < argc)
+		die( _("Unrecognized argument: %s\n"), argv[optind]);
+
+	if (opts->debug) {
+		printf( _("Command line arguments:\n"));
+		printf("  qcsize = %u\n", sdp->qcsize);
+		printf("  jsize = %u\n", sdp->jsize);
+		printf("  journals = %u\n", sdp->md.journals);
+		printf("  quiet = %u\n", opts->quiet);
+		printf("  path = %s\n", opts->path);
+	}
+}
+
+static void verify_arguments(struct gfs2_sbd *sdp, struct jadd_opts *opts)
+{
+	if (!opts->journals)
+		die( _("no journals specified\n"));
+	if (sdp->jsize < 32 || sdp->jsize > 1024)
+		die( _("bad journal size\n"));
+	if (!sdp->qcsize || sdp->qcsize > 64)
+		die( _("bad quota change size\n"));
+}
+
+static void print_results(struct jadd_opts *opts)
+{
+	if (opts->debug)
+		printf("\n");
+	else if (opts->quiet)
+		return;
+
+	printf( _("Filesystem: %s\n"), opts->path);
+	printf( _("Old journals: %u\n"), opts->orig_journals);
+	printf( _("New journals: %u\n"), opts->journals);
+}
+
+static int create_new_inode(struct jadd_opts *opts, uint64_t *addr)
+{
+	char *name = opts->new_inode;
+	int fd;
+	int error;
+
+	for (;;) {
+		fd = open(name, O_WRONLY | O_CREAT | O_EXCL | O_NOFOLLOW | O_CLOEXEC, 0600);
+		if (fd >= 0)
+			break;
+		if (errno == EEXIST) {
+			error = unlink(name);
+			if (error){
+				perror("unlink");
+				exit(EXIT_FAILURE);
+			}
+		} else{
+			perror("create");
+			exit(EXIT_FAILURE);
+		}
+	}
+	if (addr != NULL) {
+		struct stat st;
+
+		fstat(fd, &st);
+		*addr = st.st_ino;
+	}
+
+	return fd;
+}
+
+static void add_ir(struct jadd_opts *opts)
+{
+	int fd;
+	char new_name[256];
+	int error;
+
+	fd = create_new_inode(opts, NULL);
+
+	{
+		struct gfs2_inum_range ir;
+
+		set_flags(fd, JA_FL_SET, FS_JOURNAL_DATA_FL);
+		memset(&ir, 0, sizeof(struct gfs2_inum_range));
+		if (write(fd, (void*)&ir, sizeof(struct gfs2_inum_range)) !=
+		    sizeof(struct gfs2_inum_range)) {
+			perror("add_ir");
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	close(fd);
+
+	sprintf(new_name, "inum_range%u", opts->journals);
+	error = rename2system(opts, opts->per_node, new_name);
+	if (error < 0 && errno != EEXIST){
+		perror("add_ir rename2system");
+		exit(EXIT_FAILURE);
+	}
+}
+
+static void add_sc(struct jadd_opts *opts)
+{
+	int fd;
+	char new_name[256];
+	int error;
+
+	fd = create_new_inode(opts, NULL);
+
+	{
+		struct gfs2_statfs_change sc;
+		set_flags(fd, JA_FL_SET, FS_JOURNAL_DATA_FL);
+
+		memset(&sc, 0, sizeof(struct gfs2_statfs_change));
+		if (write(fd, (void*)&sc, sizeof(struct gfs2_statfs_change)) !=
+		    sizeof(struct gfs2_statfs_change)) {
+			perror("add_sc");
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	close(fd);
+
+	sprintf(new_name, "statfs_change%u", opts->journals);
+	error = rename2system(opts, opts->per_node, new_name);
+	if (error < 0 && errno != EEXIST){
+		perror("add_sc rename2system");
+		exit(EXIT_FAILURE);
+	}
+}
+
+static void add_qc(struct gfs2_sbd *sdp, struct jadd_opts *opts)
+{
+	int fd;
+	char new_name[256];
+	int error;
+
+	fd = create_new_inode(opts, NULL);
+
+	{
+		char buf[sdp->bsize];
+		unsigned int blocks =
+			sdp->qcsize << (20 - sdp->sd_sb.sb_bsize_shift);
+		unsigned int x;
+		struct gfs2_meta_header mh;
+
+		set_flags(fd, JA_FL_CLEAR, FS_JOURNAL_DATA_FL);
+		memset(buf, 0, sdp->bsize);
+
+		for (x=0; x<blocks; x++) {
+			if (write(fd, buf, sdp->bsize) != sdp->bsize) {
+				perror("add_qc");
+				exit(EXIT_FAILURE);
+			}
+		}
+
+		lseek(fd, 0, SEEK_SET);
+
+		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;
+		gfs2_meta_header_out(&mh, buf);
+
+		for (x=0; x<blocks; x++) {
+			if (write(fd, buf, sdp->bsize) != sdp->bsize) {
+				perror("add_qc");
+				exit(EXIT_FAILURE);
+			}
+		}
+
+		error = fsync(fd);
+		if (error){
+			perror("add_qc fsync");
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	close(fd);
+
+	sprintf(new_name, "quota_change%u", opts->journals);
+	error = rename2system(opts, opts->per_node, new_name);
+	if (error < 0 && errno != EEXIST){
+		perror("add_qc rename2system");
+		exit(EXIT_FAILURE);
+	}
+}
+
+static void gather_info(struct gfs2_sbd *sdp, struct jadd_opts *opts)
+{
+	struct statfs statbuf;
+	if (statfs(opts->path, &statbuf) < 0) {
+		perror(opts->path);
+		exit(EXIT_FAILURE);
+	}
+	sdp->bsize = statbuf.f_bsize;
+}
+
+static void find_current_journals(struct jadd_opts *opts)
+{
+	struct dirent *dp;
+	DIR *dirp;
+	unsigned existing_journals = 0;
+
+	dirp = opendir(opts->jindex);
+	if (!dirp) {
+		perror("jindex");
+		exit(EXIT_FAILURE);
+	}
+	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( _("No journals found. Did you run mkfs.gfs2 correctly?\n"));
+	}
+
+	opts->orig_journals = existing_journals;
+}
+
+#ifdef GFS2_HAS_LH_V2
+static uint64_t find_block_address(int fd, off_t offset, unsigned bsize)
+{
+	struct {
+		struct fiemap fm;
+		struct fiemap_extent fe;
+	} fme;
+	int ret;
+
+	fme.fm.fm_start = offset;
+	fme.fm.fm_length = 1;
+	fme.fm.fm_flags = FIEMAP_FLAG_SYNC;
+	fme.fm.fm_extent_count = 1;
+
+	ret = ioctl(fd, FS_IOC_FIEMAP, &fme.fm);
+	if (ret != 0 || fme.fm.fm_mapped_extents != 1) {
+		fprintf(stderr, "Failed to find log header block address\n");
+		return 0;
+	}
+	return fme.fe.fe_physical / bsize;
+}
+#endif
+
+static void add_j(struct gfs2_sbd *sdp, struct jadd_opts *opts)
+{
+	int fd;
+	char new_name[256];
+	int error;
+	uint64_t addr;
+
+	fd = create_new_inode(opts, &addr);
+
+	{
+		char buf[sdp->bsize];
+		unsigned int blocks =
+			sdp->jsize << (20 - sdp->sd_sb.sb_bsize_shift);
+		unsigned int x;
+		struct gfs2_log_header lh;
+		uint64_t seq = RANDOM(blocks);
+		off_t off = 0;
+
+		set_flags(fd, JA_FL_CLEAR, FS_JOURNAL_DATA_FL);
+		memset(buf, 0, sdp->bsize);
+		for (x=0; x<blocks; x++) {
+			if (write(fd, buf, sdp->bsize) != sdp->bsize) {
+				perror("add_j");
+				exit(EXIT_FAILURE);
+			}
+		}
+
+		lseek(fd, 0, SEEK_SET);
+
+		memset(&lh, 0, sizeof(struct gfs2_log_header));
+		lh.lh_header.mh_magic = GFS2_MAGIC;
+		lh.lh_header.mh_type = GFS2_METATYPE_LH;
+		lh.lh_header.mh_format = GFS2_FORMAT_LH;
+		lh.lh_flags = GFS2_LOG_HEAD_UNMOUNT;
+#ifdef GFS2_HAS_LH_V2
+		lh.lh_flags |= GFS2_LOG_HEAD_USERSPACE;
+		lh.lh_jinode = addr;
+#endif
+		for (x=0; x<blocks; x++) {
+			uint32_t hash;
+
+			lh.lh_sequence = seq;
+			lh.lh_blkno = x;
+			gfs2_log_header_out(&lh, buf);
+			hash = lgfs2_log_header_hash(buf);
+			((struct gfs2_log_header *)buf)->lh_hash = cpu_to_be32(hash);
+#ifdef GFS2_HAS_LH_V2
+			((struct gfs2_log_header *)buf)->lh_addr = cpu_to_be64(
+			                           find_block_address(fd, off, sdp->bsize));
+			hash = lgfs2_log_header_crc(buf, sdp->bsize);
+			((struct gfs2_log_header *)buf)->lh_crc = cpu_to_be32(hash);
+#endif
+			if (write(fd, buf, sdp->bsize) != sdp->bsize) {
+				perror("add_j");
+				exit(EXIT_FAILURE);
+			}
+
+			if (++seq == blocks)
+				seq = 0;
+			off += sdp->bsize;
+		}
+
+		error = fsync(fd);
+		if (error){
+			perror("add_j fsync");
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	close(fd);
+
+	sprintf(new_name, "journal%u", opts->journals);
+	error = rename2system(opts, opts->jindex, new_name);
+	if (error < 0 && errno != EEXIST){
+		perror("add_j rename2system");
+		exit(EXIT_FAILURE);
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	struct jadd_opts opts = {0};
+	struct gfs2_sbd sbd, *sdp = &sbd;
+	struct metafs mfs = {0};
+	struct mntent *mnt;
+	unsigned int total;
+
+	setlocale(LC_ALL, "");
+	textdomain("gfs2-utils");
+	srandom(time(NULL) ^ getpid());
+
+	memset(sdp, 0, sizeof(struct gfs2_sbd));
+	sdp->jsize = GFS2_DEFAULT_JSIZE;
+	sdp->qcsize = GFS2_DEFAULT_QCSIZE;
+	opts.journals = 1;
+
+	decode_arguments(argc, argv, sdp, &opts);
+	verify_arguments(sdp, &opts);
+
+	sbd.path_fd = lgfs2_open_mnt_dir(opts.path, O_RDONLY|O_CLOEXEC, &mnt);
+	if (sbd.path_fd < 0) {
+		fprintf(stderr, _("Error looking up mount '%s': %s\n"), opts.path, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+	if (mnt == NULL) {
+		fprintf(stderr, _("%s: not a mounted gfs2 file system\n"), opts.path);
+		exit(EXIT_FAILURE);
+	}
+	gather_info(sdp, &opts);
+	mfs.context = copy_context_opt(mnt);
+	if (mount_gfs2_meta(&mfs, mnt->mnt_dir, opts.debug)) {
+		perror("GFS2 metafs");
+		exit(EXIT_FAILURE);
+	}
+
+	if (build_paths(mfs.path, &opts)) {
+		perror(_("Failed to build paths"));
+		exit(EXIT_FAILURE);
+	}
+
+	if (compute_constants(sdp)) {
+		perror(_("Failed to compute file system constants"));
+		exit(EXIT_FAILURE);
+	}
+	find_current_journals(&opts);
+
+	total = opts.orig_journals + opts.journals;
+	for (opts.journals = opts.orig_journals;
+	     opts.journals < total;
+	     opts.journals++) {
+		if (metafs_interrupted) {
+			cleanup_metafs(&mfs);
+			exit(130);
+		}
+		add_ir(&opts);
+		add_sc(&opts);
+		add_qc(sdp, &opts);
+		add_j(sdp, &opts);
+	}
+
+	free(opts.new_inode);
+	free(opts.per_node);
+	free(opts.jindex);
+	close(sdp->path_fd);
+	cleanup_metafs(&mfs);
+	sync();
+	print_results(&opts);
+
+	return 0;
+}