btrfs-progs: replace open_file_or_dir with btrfs_open_fd2

For historical reasons the helpers [btrfs_]open_dir... return also
the 'DIR *dirstream' value when a directory is opened.

However this is never used. So avoid calling diropen() and return
only the fd.

Replace open_file_or_dir() with btrfs_open_fd2() removing any reference
to the unused/useless dirstream variables.  btrfs_open_fd2() is required
to avoid spurious error messages.

Signed-off-by: Goffredo Baroncelli <kreijack@libero.it>
Signed-off-by: David Sterba <dsterba@suse.com>

cmds/inspect.c

@@ -1020,7 +1020,6 @@ static int cmd_inspect_list_chunks(const struct cmd_struct *cmd,
 	int ret;
 	int fd;
 	int i;
-	DIR *dirstream = NULL;
 	unsigned unit_mode;
 	char *sortmode = NULL;
 	bool with_usage = true;
@@ -1083,7 +1082,7 @@ static int cmd_inspect_list_chunks(const struct cmd_struct *cmd,
 
 	path = argv[optind];
 
-	fd = open_file_or_dir(path, &dirstream);
+	fd = btrfs_open_fd2(path, false, true, false);
 	if (fd < 0) {
 	        error("cannot access '%s': %m", path);
 		return 1;
@@ -1187,7 +1186,7 @@ static int cmd_inspect_list_chunks(const struct cmd_struct *cmd,
 	}
 
 	ret = print_list_chunks(&ctx, sortmode, unit_mode, with_usage, with_empty);
-	close_file_or_dir(fd, dirstream);
+	close(fd);
 
 out_nomem:
 	free(ctx.stats);

cmds/scrub.c

@@ -1999,7 +1999,6 @@ static int cmd_scrub_limit(const struct cmd_struct *cmd, int argc, char **argv)
 	struct string_table *table = NULL;
 	int ret;
 	int fd = -1;
-	DIR *dirstream = NULL;
 	int cols, idx;
 	u64 opt_devid = 0;
 	bool devid_set = false;
@@ -2060,7 +2059,7 @@ static int cmd_scrub_limit(const struct cmd_struct *cmd, int argc, char **argv)
 		return 1;
 	}
 
-	fd = open_file_or_dir(argv[optind], &dirstream);
+	fd = btrfs_open_fd2(argv[optind], false, true, false);
 	if (fd < 0)
 		return 1;
 
@@ -2182,7 +2181,7 @@ static int cmd_scrub_limit(const struct cmd_struct *cmd, int argc, char **argv)
 out:
 	if (table)
 		table_free(table);
-	close_file_or_dir(fd, dirstream);
+	close(fd);
 
 	return !!ret;
 }

cmds/subvolume.c

@@ -1566,7 +1566,6 @@ static int cmd_subvolume_show(const struct cmd_struct *cmd, int argc, char **arg
 	char *fullpath = NULL;
 	int fd = -1;
 	int ret = 1;
-	DIR *dirstream1 = NULL;
 	int by_rootid = 0;
 	int by_uuid = 0;
 	u64 rootid_arg = 0;
@@ -1624,7 +1623,7 @@ static int cmd_subvolume_show(const struct cmd_struct *cmd, int argc, char **arg
 		goto out;
 	}
 
-	fd = open_file_or_dir(fullpath, &dirstream1);
+	fd = btrfs_open_fd2(fullpath, false, true, false);
 	if (fd < 0) {
 		error("can't access '%s'", fullpath);
 		goto out;
@@ -1762,7 +1761,7 @@ out2:
 
 out:
 	free(subvol_path);
-	close_file_or_dir(fd, dirstream1);
+	close(fd);
 	free(fullpath);
 	return !!ret;
 }

common/utils.c

@@ -211,7 +211,6 @@ int get_fs_info(const char *path, struct btrfs_ioctl_fs_info_args *fi_args,
 	struct btrfs_ioctl_dev_info_args *di_args;
 	struct btrfs_ioctl_dev_info_args tmp;
 	char mp[PATH_MAX];
-	DIR *dirstream = NULL;
 
 	memset(fi_args, 0, sizeof(*fi_args));
 
@@ -251,7 +250,7 @@ int get_fs_info(const char *path, struct btrfs_ioctl_fs_info_args *fi_args,
 	}
 
 	/* at this point path must not be for a block device */
-	fd = open_file_or_dir(path, &dirstream);
+	fd = btrfs_open_fd2(path, false, true, false);
 	if (fd < 0) {
 		ret = -errno;
 		goto out;
@@ -317,7 +316,7 @@ int get_fs_info(const char *path, struct btrfs_ioctl_fs_info_args *fi_args,
 	}
 
 out:
-	close_file_or_dir(fd, dirstream);
+	close(fd);
 	return ret;
 }