X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=cmds-quota.c;h=745889d125236e71e9fe096974f8e3ae26794eec;hb=3ccad2a6443fcae0fee2cd94132580d2d06268dd;hp=8481514cb2b9449ad13291ada50106741f45074e;hpb=7b1c567c84a6292c138db3bd1638e19e73e0e593;p=platform%2Fupstream%2Fbtrfs-progs.git

diff --git a/cmds-quota.c b/cmds-quota.c
index 8481514..745889d 100644
--- a/cmds-quota.c
+++ b/cmds-quota.c
@@ -24,19 +24,20 @@
 
 #include "commands.h"
 #include "utils.h"
+#include "help.h"
 
 static const char * const quota_cmd_group_usage[] = {
 	"btrfs quota <command> [options] <path>",
 	NULL
 };
 
-int quota_ctl(int cmd, int argc, char **argv)
+static int quota_ctl(int cmd, int argc, char **argv)
 {
 	int ret = 0;
 	int fd;
-	int e;
 	char *path = argv[1];
 	struct btrfs_ioctl_quota_ctl_args args;
+	DIR *dirstream = NULL;
 
 	if (check_argc_exact(argc, 2))
 		return -1;
@@ -44,19 +45,15 @@ int quota_ctl(int cmd, int argc, char **argv)
 	memset(&args, 0, sizeof(args));
 	args.cmd = cmd;
 
-	fd = open_file_or_dir(path);
-	if (fd < 0) {
-		fprintf(stderr, "ERROR: can't access '%s'\n", path);
-		return 12;
-	}
+	fd = btrfs_open_dir(path, &dirstream, 1);
+	if (fd < 0)
+		return 1;
 
 	ret = ioctl(fd, BTRFS_IOC_QUOTA_CTL, &args);
-	e = errno;
-	close(fd);
+	close_file_or_dir(fd, dirstream);
 	if (ret < 0) {
-		fprintf(stderr, "ERROR: quota command failed: %s\n",
-			strerror(e));
-		return 30;
+		error("quota command failed: %m");
+		return 1;
 	}
 	return 0;
 }
@@ -64,12 +61,20 @@ int quota_ctl(int cmd, int argc, char **argv)
 static const char * const cmd_quota_enable_usage[] = {
 	"btrfs quota enable <path>",
 	"Enable subvolume quota support for a filesystem.",
+	"Any data already present on the filesystem will not count towards",
+	"the space usage numbers. It is recommended to enable quota for a",
+	"filesystem before writing any data to it.",
 	NULL
 };
 
 static int cmd_quota_enable(int argc, char **argv)
 {
-	int ret = quota_ctl(BTRFS_QUOTA_CTL_ENABLE, argc, argv);
+	int ret;
+
+	clean_args_no_options(argc, argv, cmd_quota_enable_usage);
+
+	ret = quota_ctl(BTRFS_QUOTA_CTL_ENABLE, argc, argv);
+
 	if (ret < 0)
 		usage(cmd_quota_enable_usage);
 	return ret;
@@ -83,32 +88,118 @@ static const char * const cmd_quota_disable_usage[] = {
 
 static int cmd_quota_disable(int argc, char **argv)
 {
-	int ret = quota_ctl(BTRFS_QUOTA_CTL_DISABLE, argc, argv);
+	int ret;
+
+	clean_args_no_options(argc, argv, cmd_quota_disable_usage);
+
+	ret = quota_ctl(BTRFS_QUOTA_CTL_DISABLE, argc, argv);
+
 	if (ret < 0)
 		usage(cmd_quota_disable_usage);
 	return ret;
 }
 
 static const char * const cmd_quota_rescan_usage[] = {
-	"btrfs quota rescan <path>",
-	"Rescan the subvolume for a changed quota setting.",
+	"btrfs quota rescan [-sw] <path>",
+	"Trash all qgroup numbers and scan the metadata again with the current config.",
+	"",
+	"-s   show status of a running rescan operation",
+	"-w   wait for rescan operation to finish (can be already in progress)",
 	NULL
 };
 
 static int cmd_quota_rescan(int argc, char **argv)
 {
-	int ret = quota_ctl(BTRFS_QUOTA_CTL_RESCAN, argc, argv);
-	if (ret < 0)
+	int ret = 0;
+	int fd;
+	int e;
+	char *path = NULL;
+	struct btrfs_ioctl_quota_rescan_args args;
+	unsigned long ioctlnum = BTRFS_IOC_QUOTA_RESCAN;
+	DIR *dirstream = NULL;
+	int wait_for_completion = 0;
+
+	while (1) {
+		int c = getopt(argc, argv, "sw");
+		if (c < 0)
+			break;
+		switch (c) {
+		case 's':
+			ioctlnum = BTRFS_IOC_QUOTA_RESCAN_STATUS;
+			break;
+		case 'w':
+			wait_for_completion = 1;
+			break;
+		default:
+			usage(cmd_quota_rescan_usage);
+		}
+	}
+
+	if (ioctlnum != BTRFS_IOC_QUOTA_RESCAN && wait_for_completion) {
+		error("switch -w cannot be used with -s");
+		return 1;
+	}
+
+	if (check_argc_exact(argc - optind, 1))
 		usage(cmd_quota_rescan_usage);
-	return ret;
+
+	memset(&args, 0, sizeof(args));
+
+	path = argv[optind];
+	fd = btrfs_open_dir(path, &dirstream, 1);
+	if (fd < 0)
+		return 1;
+
+	ret = ioctl(fd, ioctlnum, &args);
+	e = errno;
+
+	if (ioctlnum == BTRFS_IOC_QUOTA_RESCAN_STATUS) {
+		close_file_or_dir(fd, dirstream);
+		if (ret < 0) {
+			error("could not obtain quota rescan status: %m");
+			return 1;
+		}
+		if (!args.flags)
+			printf("no rescan operation in progress\n");
+		else
+			printf("rescan operation running (current key %lld)\n",
+				args.progress);
+		return 0;
+	}
+
+	if (ret == 0) {
+		printf("quota rescan started\n");
+		fflush(stdout);
+	} else if (ret < 0 && (!wait_for_completion || e != EINPROGRESS)) {
+		error("quota rescan failed: %m");
+		close_file_or_dir(fd, dirstream);
+		return 1;
+	}
+
+	if (wait_for_completion) {
+		ret = ioctl(fd, BTRFS_IOC_QUOTA_RESCAN_WAIT, &args);
+		e = errno;
+		if (ret < 0) {
+			error("quota rescan wait failed: %m");
+			close_file_or_dir(fd, dirstream);
+			return 1;
+		}
+	}
+
+	close_file_or_dir(fd, dirstream);
+	return 0;
 }
 
+static const char quota_cmd_group_info[] =
+"manage filesystem quota settings";
+
 const struct cmd_group quota_cmd_group = {
-	quota_cmd_group_usage, NULL, {
+	quota_cmd_group_usage, quota_cmd_group_info, {
 		{ "enable", cmd_quota_enable, cmd_quota_enable_usage, NULL, 0 },
-		{ "disable", cmd_quota_disable, cmd_quota_disable_usage, 0, 0 },
+		{ "disable", cmd_quota_disable, cmd_quota_disable_usage,
+		   NULL, 0 },
 		{ "rescan", cmd_quota_rescan, cmd_quota_rescan_usage, NULL, 0 },
-		{ 0, 0, 0, 0, 0 }
+		NULL_CMD_STRUCT
 	}
 };