btrfs-progs: qgroups usability

index 745889d1..fe6376ac 100644
@@ -120,14 +120,20 @@ static int cmd_quota_rescan(int argc, char **argv)
 	int wait_for_completion = 0;
 
 	while (1) {
-		int c = getopt(argc, argv, "sw");
+		int c = getopt(argc, argv, "swW");
 		if (c < 0)
 			break;
 		switch (c) {
 		case 's':
 			ioctlnum = BTRFS_IOC_QUOTA_RESCAN_STATUS;
 			break;
+		case 'W':
+			ioctlnum = 0;
+			wait_for_completion = 1;
+			break;
 		case 'w':
+			/* Reset it in case the user did both -W and -w */
+			ioctlnum = BTRFS_IOC_QUOTA_RESCAN;
 			wait_for_completion = 1;
 			break;
 		default:

@@ -135,8 +141,9 @@ static int cmd_quota_rescan(int argc, char **argv)
 		}
 	}
 
-	if (ioctlnum != BTRFS_IOC_QUOTA_RESCAN && wait_for_completion) {
-		error("switch -w cannot be used with -s");
+	if (ioctlnum == BTRFS_IOC_QUOTA_RESCAN_STATUS && wait_for_completion) {
+		error("switch -%c cannot be used with -s",
+		      ioctlnum ? 'w' : 'W');
 		return 1;
 	}
 

@@ -150,8 +157,10 @@ static int cmd_quota_rescan(int argc, char **argv)
 	if (fd < 0)
 		return 1;
 
-	ret = ioctl(fd, ioctlnum, &args);
-	e = errno;
+	if (ioctlnum) {
+		ret = ioctl(fd, ioctlnum, &args);
+		e = errno;
+	}
 
 	if (ioctlnum == BTRFS_IOC_QUOTA_RESCAN_STATUS) {
 		close_file_or_dir(fd, dirstream);

@@ -167,7 +176,7 @@ static int cmd_quota_rescan(int argc, char **argv)
 		return 0;
 	}
 
-	if (ret == 0) {
+	if (ioctlnum == BTRFS_IOC_QUOTA_RESCAN && ret == 0) {
 		printf("quota rescan started\n");
 		fflush(stdout);
 	} else if (ret < 0 && (!wait_for_completion || e != EINPROGRESS)) {

index 11659e83..67bc0738 100644
@@ -267,7 +267,7 @@ static void print_single_qgroup_table(struct btrfs_qgroup *qgroup)
 			continue;
 		print_qgroup_column(qgroup, i);
 
-		if (i != BTRFS_QGROUP_CHILD)
+		if (i != BTRFS_QGROUP_ALL - 1)
 			printf(" ");
 	}
 	printf("\n");

index 705bcf52..1d30db51 100644
@@ -1492,7 +1492,7 @@ out:
 	return ERR_PTR(ret);
 }
 
-static int recover_prepare(struct recover_control *rc, char *path)
+static int recover_prepare(struct recover_control *rc, const char *path)
 {
 	int ret;
 	int fd;

@@ -2296,7 +2296,7 @@ static void validate_rebuild_chunks(struct recover_control *rc)
 /*
  * Return 0 when successful, < 0 on error and > 0 if aborted by user
  */
-int btrfs_recover_chunk_tree(char *path, int verbose, int yes)
+int btrfs_recover_chunk_tree(const char *path, int verbose, int yes)
 {
 	int ret = 0;
 	struct btrfs_root *root = NULL;

index 86459d1b..a49c9d9d 100644
@@ -526,7 +526,7 @@ static const char * const cmd_device_usage_usage[] = {
 	NULL
 };
 
-static int _cmd_device_usage(int fd, char *path, unsigned unit_mode)
+static int _cmd_device_usage(int fd, const char *path, unsigned unit_mode)
 {
 	int i;
 	int ret = 0;

index de7ad668..9a1c76ab 100644
@@ -227,7 +227,7 @@ static int cmp_btrfs_ioctl_space_info(const void *a, const void *b)
 /*
  * This function load all the information about the space usage
  */
-static struct btrfs_ioctl_space_args *load_space_info(int fd, char *path)
+static struct btrfs_ioctl_space_args *load_space_info(int fd, const char *path)
 {
 	struct btrfs_ioctl_space_args *sargs = NULL, *sargs_orig = NULL;
 	int ret, count;

@@ -305,7 +305,7 @@ static void get_raid56_used(struct chunk_info *chunks, int chunkcount,
 #define	MIN_UNALOCATED_THRESH	SZ_16M
 static int print_filesystem_usage_overall(int fd, struct chunk_info *chunkinfo,
 		int chunkcount, struct device_info *devinfo, int devcount,
-		char *path, unsigned unit_mode)
+		const char *path, unsigned unit_mode)
 {
 	struct btrfs_ioctl_space_args *sargs = NULL;
 	int i;

@@ -931,7 +931,7 @@ static void _cmd_filesystem_usage_linear(unsigned unit_mode,
 static int print_filesystem_usage_by_chunk(int fd,
 		struct chunk_info *chunkinfo, int chunkcount,
 		struct device_info *devinfo, int devcount,
-		char *path, unsigned unit_mode, int tabular)
+		const char *path, unsigned unit_mode, int tabular)
 {
 	struct btrfs_ioctl_space_args *sargs;
 	int ret = 0;

index c40088ad..c61145bc 100644
@@ -32,8 +32,8 @@ static const char * const rescue_cmd_group_usage[] = {
 	NULL
 };
 
-int btrfs_recover_chunk_tree(char *path, int verbose, int yes);
-int btrfs_recover_superblocks(char *path, int verbose, int yes);
+int btrfs_recover_chunk_tree(const char *path, int verbose, int yes);
+int btrfs_recover_superblocks(const char *path, int verbose, int yes);
 
 static const char * const cmd_rescue_chunk_recover_usage[] = {
 	"btrfs rescue chunk-recover [options] <device>",

index b5289e76..8ce94de1 100644
@@ -28,8 +28,8 @@
 #include "ioctl.h"
 #include "btrfs-list.h"
 
-static int btrfs_subvolid_resolve_sub(int fd, char *path, size_t *path_len,
-				      u64 subvol_id);
+static int btrfs_subvolid_resolve_sub(int fd, char *path,
+				      size_t *path_len, u64 subvol_id);
 
 static int btrfs_get_root_id_by_sub_path(int mnt_fd, const char *sub_path,
 					 u64 *root_id)

index 48686436..94cd0fd3 100644
@@ -280,8 +280,10 @@ static const char * const cmd_qgroup_show_usage[] = {
 	"               (including ancestral qgroups)",
 	"-f             list all qgroups which impact the given path",
 	"               (excluding ancestral qgroups)",
+	"-P             print first-level qgroups using pathname",
+	"-v             verbose, prints all nested subvolumes",
 	HELPINFO_UNITS_LONG,
-	"--sort=qgroupid,rfer,excl,max_rfer,max_excl",
+	"--sort=qgroupid,rfer,excl,max_rfer,max_excl,pathname",
 	"               list qgroups sorted by specified items",
 	"               you can use '+' or '-' in front of each item.",
 	"               (+:ascending, -:descending, ascending default)",

@@ -299,6 +301,7 @@ static int cmd_qgroup_show(int argc, char **argv)
 	int filter_flag = 0;
 	unsigned unit_mode;
 	int sync = 0;
+	bool verbose = false;
 
 	struct btrfs_qgroup_comparer_set *comparer_set;
 	struct btrfs_qgroup_filter_set *filter_set;

@@ -316,10 +319,11 @@ static int cmd_qgroup_show(int argc, char **argv)
 		static const struct option long_options[] = {
 			{"sort", required_argument, NULL, GETOPT_VAL_SORT},
 			{"sync", no_argument, NULL, GETOPT_VAL_SYNC},
+			{"verbose", no_argument, NULL, 'v'},
 			{ NULL, 0, NULL, 0 }
 		};
 
-		c = getopt_long(argc, argv, "pcreFf", long_options, NULL);
+		c = getopt_long(argc, argv, "pPcreFfv", long_options, NULL);
 		if (c < 0)
 			break;
 		switch (c) {

@@ -327,6 +331,10 @@ static int cmd_qgroup_show(int argc, char **argv)
 			btrfs_qgroup_setup_print_column(
 				BTRFS_QGROUP_PARENT);
 			break;
+		case 'P':
+			btrfs_qgroup_setup_print_column(
+				BTRFS_QGROUP_PATHNAME);
+			break;
 		case 'c':
 			btrfs_qgroup_setup_print_column(
 				BTRFS_QGROUP_CHILD);

@@ -354,6 +362,9 @@ static int cmd_qgroup_show(int argc, char **argv)
 		case GETOPT_VAL_SYNC:
 			sync = 1;
 			break;
+		case 'v':
+			verbose = true;
+			break;
 		default:
 			usage(cmd_qgroup_show_usage);
 		}

@@ -394,7 +405,7 @@ static int cmd_qgroup_show(int argc, char **argv)
 					BTRFS_QGROUP_FILTER_PARENT,
 					qgroupid);
 	}
-	ret = btrfs_show_qgroups(fd, filter_set, comparer_set);
+	ret = btrfs_show_qgroups(fd, filter_set, comparer_set, verbose);
 	close_file_or_dir(fd, dirstream);
 	free(filter_set);
 	free(comparer_set);

index fa96715f..f97495ee 100644
@@ -29,6 +29,7 @@
 #include <stddef.h>
 #include <linux/types.h>
 #include <stdint.h>
+#include <stdbool.h>
 
 #include <features.h>
 

270 lines not on this page · raw message

index 875fbdf3..f7ab7de5 100644
@@ -59,11 +59,13 @@ enum btrfs_qgroup_column_enum {
 	BTRFS_QGROUP_MAX_EXCL,
 	BTRFS_QGROUP_PARENT,
 	BTRFS_QGROUP_CHILD,
+	BTRFS_QGROUP_PATHNAME,
 	BTRFS_QGROUP_ALL,
 };
 
 enum btrfs_qgroup_comp_enum {
 	BTRFS_QGROUP_COMP_QGROUPID,
+	BTRFS_QGROUP_COMP_PATHNAME,
 	BTRFS_QGROUP_COMP_RFER,
 	BTRFS_QGROUP_COMP_EXCL,
 	BTRFS_QGROUP_COMP_MAX_RFER,

@@ -80,7 +82,7 @@ enum btrfs_qgroup_filter_enum {
 int btrfs_qgroup_parse_sort_string(const char *opt_arg,
 				struct btrfs_qgroup_comparer_set **comps);
 int btrfs_show_qgroups(int fd, struct btrfs_qgroup_filter_set *,
-		       struct btrfs_qgroup_comparer_set *);
+		       struct btrfs_qgroup_comparer_set *, bool verbose);
 void btrfs_qgroup_setup_print_column(enum btrfs_qgroup_column_enum column);
 void btrfs_qgroup_setup_units(unsigned unit_mode);
 struct btrfs_qgroup_filter_set *btrfs_qgroup_alloc_filter_set(void);

index e9cb3a82..68202142 100644
@@ -2556,15 +2556,9 @@ out:
 	return ret;
 }
 
-int get_subvol_info_by_rootid(const char *mnt, struct root_info *get_ri, u64 r_id)
+int get_subvol_info_by_rootid_fd(int fd, struct root_info *get_ri, u64 r_id)
 {
-	int fd;
 	int ret;
-	DIR *dirstream = NULL;
-
-	fd = btrfs_open_dir(mnt, &dirstream, 1);
-	if (fd < 0)
-		return -EINVAL;
 
 	memset(get_ri, 0, sizeof(*get_ri));
 	get_ri->root_id = r_id;

@@ -2574,6 +2568,20 @@ int get_subvol_info_by_rootid(const char *mnt, struct root_info *get_ri, u64 r_i
 	else
 		ret = btrfs_get_subvol(fd, get_ri);
 
+	return ret;
+}
+
+int get_subvol_info_by_rootid(const char *mnt, struct root_info *get_ri, u64 r_id)
+{
+	int fd;
+	int ret;
+	DIR *dirstream = NULL;
+
+	fd = btrfs_open_dir(mnt, &dirstream, 1);
+	if (fd < 0)
+		return -EINVAL;
+
+	ret = get_subvol_info_by_rootid_fd(fd, get_ri, r_id);
 	if (ret)
 		error("can't find rootid '%llu' on '%s': %d", r_id, mnt, ret);
 

index b871c9ff..722d3c48 100644
@@ -154,6 +154,8 @@ int test_isdir(const char *path);
 
 const char *subvol_strip_mountpoint(const char *mnt, const char *full_path);
 int get_subvol_info(const char *fullpath, struct root_info *get_ri);
+int get_subvol_info_by_rootid_fd(int fd, struct root_info *get_ri,
+				 u64 rootid_arg);
 int get_subvol_info_by_rootid(const char *mnt, struct root_info *get_ri,
 							u64 rootid_arg);
 int get_subvol_info_by_uuid(const char *mnt, struct root_info *get_ri,

index 94cd0fd3..eee15ef1 100644
@@ -282,6 +282,10 @@ static const char * const cmd_qgroup_show_usage[] = {
 	"               (excluding ancestral qgroups)",
 	"-P             print first-level qgroups using pathname",
 	"-v             verbose, prints all nested subvolumes",
+#ifdef HAVE_JSON
+	"-j             export in JSON format",
+	"--json-compat  export in JSON compatibility mode",
+#endif
 	HELPINFO_UNITS_LONG,
 	"--sort=qgroupid,rfer,excl,max_rfer,max_excl,pathname",
 	"               list qgroups sorted by specified items",

@@ -302,6 +306,8 @@ static int cmd_qgroup_show(int argc, char **argv)
 	unsigned unit_mode;
 	int sync = 0;
 	bool verbose = false;
+	bool export_json = false;
+	bool compat_json = false;
 
 	struct btrfs_qgroup_comparer_set *comparer_set;
 	struct btrfs_qgroup_filter_set *filter_set;

@@ -314,16 +320,26 @@ static int cmd_qgroup_show(int argc, char **argv)
 		int c;
 		enum {
 			GETOPT_VAL_SORT = 256,
-			GETOPT_VAL_SYNC
+			GETOPT_VAL_SYNC,
+			GETOPT_VAL_JSCOMPAT,
 		};
 		static const struct option long_options[] = {
 			{"sort", required_argument, NULL, GETOPT_VAL_SORT},
 			{"sync", no_argument, NULL, GETOPT_VAL_SYNC},
 			{"verbose", no_argument, NULL, 'v'},
+#ifdef HAVE_JSON
+			{"json-compat", no_argument, NULL, GETOPT_VAL_JSCOMPAT},
+#endif
 			{ NULL, 0, NULL, 0 }
 		};
-
-		c = getopt_long(argc, argv, "pPcreFfv", long_options, NULL);
+		const char getopt_chars[] = {
+			'p', 'P', 'c', 'r', 'e', 'F', 'f', 'v',
+#ifdef HAVE_JSON
+			'j',
+#endif
+			'\0' };
+
+		c = getopt_long(argc, argv, getopt_chars, long_options, NULL);
 		if (c < 0)
 			break;
 		switch (c) {

@@ -353,6 +369,14 @@ static int cmd_qgroup_show(int argc, char **argv)
 		case 'f':
 			filter_flag |= 0x2;
 			break;
+#ifdef HAVE_JSON
+		case GETOPT_VAL_JSCOMPAT:
+			compat_json = true;
+		case 'j':
+			unit_mode = UNITS_RAW;
+			export_json = true;
+			break;
+#endif
 		case GETOPT_VAL_SORT:
 			ret = btrfs_qgroup_parse_sort_string(optarg,
 							     &comparer_set);

@@ -405,7 +429,11 @@ static int cmd_qgroup_show(int argc, char **argv)
 					BTRFS_QGROUP_FILTER_PARENT,
 					qgroupid);
 	}
-	ret = btrfs_show_qgroups(fd, filter_set, comparer_set, verbose);
+	if (export_json)
+		ret = btrfs_export_qgroups_json(fd, filter_set, comparer_set,
+						compat_json);
+	else
+		ret = btrfs_show_qgroups(fd, filter_set, comparer_set, verbose);
 	close_file_or_dir(fd, dirstream);
 	free(filter_set);
 	free(comparer_set);

229 lines not on this page · raw message

index f7ab7de5..94717b67 100644
@@ -83,6 +83,9 @@ int btrfs_qgroup_parse_sort_string(const char *opt_arg,
 				struct btrfs_qgroup_comparer_set **comps);
 int btrfs_show_qgroups(int fd, struct btrfs_qgroup_filter_set *,
 		       struct btrfs_qgroup_comparer_set *, bool verbose);
+int btrfs_export_qgroups_json(int fd, struct btrfs_qgroup_filter_set *,
+			      struct btrfs_qgroup_comparer_set *,
+			      bool compat);
 void btrfs_qgroup_setup_print_column(enum btrfs_qgroup_column_enum column);
 void btrfs_qgroup_setup_units(unsigned unit_mode);
 struct btrfs_qgroup_filter_set *btrfs_qgroup_alloc_filter_set(void);

index 83918134..b1be3311 100644
@@ -46,20 +46,12 @@ struct btrfs_qgroup {
 	/*
 	 * info_item
 	 */
-	u64 generation;
-	u64 rfer;	/*referenced*/
-	u64 rfer_cmpr;	/*referenced compressed*/
-	u64 excl;	/*exclusive*/
-	u64 excl_cmpr;	/*exclusive compressed*/
+	struct btrfs_qgroup_info info;
 
 	/*
 	 *limit_item
 	 */
-	u64 flags;	/*which limits are set*/
-	u64 max_rfer;
-	u64 max_excl;
-	u64 rsv_rfer;
-	u64 rsv_excl;
+	struct btrfs_qgroup_limit limit;
 
 	/*qgroups this group is member of*/
 	struct list_head qgroups;

@@ -272,24 +264,24 @@ static void print_qgroup_column(struct btrfs_qgroup *qgroup,
 		print_qgroup_column_add_blank(BTRFS_QGROUP_QGROUPID, len);
 		break;
 	case BTRFS_QGROUP_RFER:
-		len = printf("%*s", max_len, pretty_size_mode(qgroup->rfer, unit_mode));
+		len = printf("%*s", max_len, pretty_size_mode(qgroup->info.referenced, unit_mode));
 		break;
 	case BTRFS_QGROUP_EXCL:
-		len = printf("%*s", max_len, pretty_size_mode(qgroup->excl, unit_mode));
+		len = printf("%*s", max_len, pretty_size_mode(qgroup->info.exclusive, unit_mode));
 		break;
 	case BTRFS_QGROUP_PARENT:
 		len = print_parent_column(qgroup);
 		print_qgroup_column_add_blank(BTRFS_QGROUP_PARENT, len);
 		break;
 	case BTRFS_QGROUP_MAX_RFER:
-		if (qgroup->flags & BTRFS_QGROUP_LIMIT_MAX_RFER)
-			len = printf("%*s", max_len, pretty_size_mode(qgroup->max_rfer, unit_mode));
+		if (qgroup->limit.flags & BTRFS_QGROUP_LIMIT_MAX_RFER)
+			len = printf("%*s", max_len, pretty_size_mode(qgroup->limit.max_referenced, unit_mode));
 		else
 			len = printf("%*s", max_len, "none");
 		break;
 	case BTRFS_QGROUP_MAX_EXCL:
-		if (qgroup->flags & BTRFS_QGROUP_LIMIT_MAX_EXCL)
-			len = printf("%*s", max_len, pretty_size_mode(qgroup->max_excl, unit_mode));
+		if (qgroup->limit.flags & BTRFS_QGROUP_LIMIT_MAX_EXCL)
+			len = printf("%*s", max_len, pretty_size_mode(qgroup->limit.max_exclusive, unit_mode));
 		else
 			len = printf("%*s", max_len, "none");
 		break;

@@ -432,9 +424,9 @@ static int comp_entry_with_rfer(struct btrfs_qgroup *entry1,
 {
 	int ret;
 
-	if (entry1->rfer > entry2->rfer)
+	if (entry1->info.referenced > entry2->info.referenced)
 		ret = 1;
-	else if (entry1->rfer < entry2->rfer)
+	else if (entry1->info.referenced < entry2->info.referenced)
 		ret = -1;
 	else
 		ret = 0;

@@ -448,9 +440,9 @@ static int comp_entry_with_excl(struct btrfs_qgroup *entry1,
 {
 	int ret;
 
-	if (entry1->excl > entry2->excl)
+	if (entry1->info.exclusive > entry2->info.exclusive)
 		ret = 1;
-	else if (entry1->excl < entry2->excl)
+	else if (entry1->info.exclusive < entry2->info.exclusive)
 		ret = -1;
 	else
 		ret = 0;

@@ -464,9 +456,9 @@ static int comp_entry_with_max_rfer(struct btrfs_qgroup *entry1,
 {
 	int ret;
 
-	if (entry1->max_rfer > entry2->max_rfer)
+	if (entry1->limit.max_referenced > entry2->limit.max_referenced)
 		ret = 1;
-	else if (entry1->max_rfer < entry2->max_rfer)
+	else if (entry1->limit.max_referenced < entry2->limit.max_referenced)
 		ret = -1;
 	else
 		ret = 0;

@@ -480,9 +472,9 @@ static int comp_entry_with_max_excl(struct btrfs_qgroup *entry1,
 {
 	int ret;
 
-	if (entry1->max_excl > entry2->max_excl)
+	if (entry1->limit.max_exclusive > entry2->limit.max_exclusive)
 		ret = 1;
-	else if (entry1->max_excl < entry2->max_excl)
+	else if (entry1->limit.max_exclusive < entry2->limit.max_exclusive)
 		ret = -1;
 	else
 		ret = 0;

@@ -739,11 +731,13 @@ static int update_qgroup_info(int fd, struct qgroup_lookup *qgroup_lookup,
 	if (IS_ERR_OR_NULL(bq))
 		return PTR_ERR(bq);
 
-	bq->generation = btrfs_stack_qgroup_info_generation(info);
-	bq->rfer = btrfs_stack_qgroup_info_referenced(info);
-	bq->rfer_cmpr = btrfs_stack_qgroup_info_referenced_compressed(info);
-	bq->excl = btrfs_stack_qgroup_info_exclusive(info);
-	bq->excl_cmpr = btrfs_stack_qgroup_info_exclusive_compressed(info);
+	bq->info.generation = btrfs_stack_qgroup_info_generation(info);
+	bq->info.referenced = btrfs_stack_qgroup_info_referenced(info);
+	bq->info.referenced_compressed =
+			btrfs_stack_qgroup_info_referenced_compressed(info);
+	bq->info.exclusive = btrfs_stack_qgroup_info_exclusive(info);
+	bq->info.exclusive_compressed =
+			btrfs_stack_qgroup_info_exclusive_compressed(info);
 
 	return 0;
 }

@@ -758,11 +752,14 @@ static int update_qgroup_limit(int fd, struct qgroup_lookup *qgroup_lookup,
 	if (IS_ERR_OR_NULL(bq))
 		return PTR_ERR(bq);
 
-	bq->flags = btrfs_stack_qgroup_limit_flags(limit);
-	bq->max_rfer = btrfs_stack_qgroup_limit_max_referenced(limit);
-	bq->max_excl = btrfs_stack_qgroup_limit_max_exclusive(limit);
-	bq->rsv_rfer = btrfs_stack_qgroup_limit_rsv_referenced(limit);
-	bq->rsv_excl = btrfs_stack_qgroup_limit_rsv_exclusive(limit);
+	bq->limit.flags = btrfs_stack_qgroup_limit_flags(limit);
+	bq->limit.max_referenced =
+			btrfs_stack_qgroup_limit_max_referenced(limit);
+	bq->limit.max_exclusive =
+			btrfs_stack_qgroup_limit_max_exclusive(limit);
+	bq->limit.rsv_referenced =
+			btrfs_stack_qgroup_limit_rsv_referenced(limit);
+	bq->limit.rsv_exclusive = btrfs_stack_qgroup_limit_rsv_exclusive(limit);
 
 	return 0;
 }

@@ -1053,22 +1050,22 @@ static void __update_columns_max_len(struct btrfs_qgroup *bq,
 			btrfs_qgroup_columns[column].max_len = len;
 		break;
 	case BTRFS_QGROUP_RFER:
-		len = strlen(pretty_size_mode(bq->rfer, unit_mode));
+		len = strlen(pretty_size_mode(bq->info.referenced, unit_mode));
 		if (btrfs_qgroup_columns[column].max_len < len)
 			btrfs_qgroup_columns[column].max_len = len;
 		break;
 	case BTRFS_QGROUP_EXCL:
-		len = strlen(pretty_size_mode(bq->excl, unit_mode));
+		len = strlen(pretty_size_mode(bq->info.exclusive, unit_mode));
 		if (btrfs_qgroup_columns[column].max_len < len)
 			btrfs_qgroup_columns[column].max_len = len;
 		break;
 	case BTRFS_QGROUP_MAX_RFER:
-		len = strlen(pretty_size_mode(bq->max_rfer, unit_mode));
+		len = strlen(pretty_size_mode(bq->limit.max_referenced, unit_mode));
 		if (btrfs_qgroup_columns[column].max_len < len)
 			btrfs_qgroup_columns[column].max_len = len;
 		break;
 	case BTRFS_QGROUP_MAX_EXCL:
-		len = strlen(pretty_size_mode(bq->max_excl, unit_mode));
+		len = strlen(pretty_size_mode(bq->limit.max_exclusive, unit_mode));
 		if (btrfs_qgroup_columns[column].max_len < len)
 			btrfs_qgroup_columns[column].max_len = len;
 		break;

index f7ab7de5..5e71349c 100644
@@ -79,6 +79,14 @@ enum btrfs_qgroup_filter_enum {
 	BTRFS_QGROUP_FILTER_MAX,
 };
 
+struct btrfs_qgroup_info {
+	u64 generation;
+	u64 referenced;
+	u64 referenced_compressed;
+	u64 exclusive;
+	u64 exclusive_compressed;
+};
+
 int btrfs_qgroup_parse_sort_string(const char *opt_arg,
 				struct btrfs_qgroup_comparer_set **comps);
 int btrfs_show_qgroups(int fd, struct btrfs_qgroup_filter_set *,

index 5a7a8530..7ec12ec1 100644
@@ -50,20 +50,12 @@ struct btrfs_qgroup {
 	/*
 	 * info_item
 	 */
-	u64 generation;
-	u64 rfer;	/*referenced*/
-	u64 rfer_cmpr;	/*referenced compressed*/
-	u64 excl;	/*exclusive*/
-	u64 excl_cmpr;	/*exclusive compressed*/
+	struct btrfs_qgroup_info info;
 
 	/*
 	 *limit_item
 	 */
-	u64 flags;	/*which limits are set*/
-	u64 max_rfer;
-	u64 max_excl;
-	u64 rsv_rfer;
-	u64 rsv_excl;
+	struct btrfs_qgroup_limit limit;
 
 	/*qgroups this group is member of*/
 	struct list_head qgroups;

@@ -276,24 +268,24 @@ static void print_qgroup_column(struct btrfs_qgroup *qgroup,
 		print_qgroup_column_add_blank(BTRFS_QGROUP_QGROUPID, len);
 		break;
 	case BTRFS_QGROUP_RFER:
-		len = printf("%*s", max_len, pretty_size_mode(qgroup->rfer, unit_mode));
+		len = printf("%*s", max_len, pretty_size_mode(qgroup->info.referenced, unit_mode));
 		break;
 	case BTRFS_QGROUP_EXCL:
-		len = printf("%*s", max_len, pretty_size_mode(qgroup->excl, unit_mode));
+		len = printf("%*s", max_len, pretty_size_mode(qgroup->info.exclusive, unit_mode));
 		break;
 	case BTRFS_QGROUP_PARENT:
 		len = print_parent_column(qgroup);
 		print_qgroup_column_add_blank(BTRFS_QGROUP_PARENT, len);
 		break;
 	case BTRFS_QGROUP_MAX_RFER:
-		if (qgroup->flags & BTRFS_QGROUP_LIMIT_MAX_RFER)
-			len = printf("%*s", max_len, pretty_size_mode(qgroup->max_rfer, unit_mode));
+		if (qgroup->limit.flags & BTRFS_QGROUP_LIMIT_MAX_RFER)
+			len = printf("%*s", max_len, pretty_size_mode(qgroup->limit.max_referenced, unit_mode));
 		else
 			len = printf("%*s", max_len, "none");
 		break;
 	case BTRFS_QGROUP_MAX_EXCL:
-		if (qgroup->flags & BTRFS_QGROUP_LIMIT_MAX_EXCL)
-			len = printf("%*s", max_len, pretty_size_mode(qgroup->max_excl, unit_mode));
+		if (qgroup->limit.flags & BTRFS_QGROUP_LIMIT_MAX_EXCL)
+			len = printf("%*s", max_len, pretty_size_mode(qgroup->limit.max_exclusive, unit_mode));
 		else
 			len = printf("%*s", max_len, "none");
 		break;

@@ -436,9 +428,9 @@ static int comp_entry_with_rfer(struct btrfs_qgroup *entry1,
 {
 	int ret;
 
-	if (entry1->rfer > entry2->rfer)
+	if (entry1->info.referenced > entry2->info.referenced)
 		ret = 1;
-	else if (entry1->rfer < entry2->rfer)
+	else if (entry1->info.referenced < entry2->info.referenced)
 		ret = -1;
 	else
 		ret = 0;

@@ -452,9 +444,9 @@ static int comp_entry_with_excl(struct btrfs_qgroup *entry1,
 {
 	int ret;
 
-	if (entry1->excl > entry2->excl)
+	if (entry1->info.exclusive > entry2->info.exclusive)
 		ret = 1;
-	else if (entry1->excl < entry2->excl)
+	else if (entry1->info.exclusive < entry2->info.exclusive)
 		ret = -1;
 	else
 		ret = 0;

@@ -468,9 +460,9 @@ static int comp_entry_with_max_rfer(struct btrfs_qgroup *entry1,
 {
 	int ret;
 
-	if (entry1->max_rfer > entry2->max_rfer)
+	if (entry1->limit.max_referenced > entry2->limit.max_referenced)
 		ret = 1;
-	else if (entry1->max_rfer < entry2->max_rfer)
+	else if (entry1->limit.max_referenced < entry2->limit.max_referenced)
 		ret = -1;
 	else
 		ret = 0;

@@ -484,9 +476,9 @@ static int comp_entry_with_max_excl(struct btrfs_qgroup *entry1,
 {
 	int ret;
 
-	if (entry1->max_excl > entry2->max_excl)
+	if (entry1->limit.max_exclusive > entry2->limit.max_exclusive)
 		ret = 1;
-	else if (entry1->max_excl < entry2->max_excl)
+	else if (entry1->limit.max_exclusive < entry2->limit.max_exclusive)
 		ret = -1;
 	else
 		ret = 0;

@@ -743,11 +735,13 @@ static int update_qgroup_info(int fd, struct qgroup_lookup *qgroup_lookup,
 	if (IS_ERR_OR_NULL(bq))
 		return PTR_ERR(bq);
 
-	bq->generation = btrfs_stack_qgroup_info_generation(info);
-	bq->rfer = btrfs_stack_qgroup_info_referenced(info);
-	bq->rfer_cmpr = btrfs_stack_qgroup_info_referenced_compressed(info);
-	bq->excl = btrfs_stack_qgroup_info_exclusive(info);
-	bq->excl_cmpr = btrfs_stack_qgroup_info_exclusive_compressed(info);
+	bq->info.generation = btrfs_stack_qgroup_info_generation(info);
+	bq->info.referenced = btrfs_stack_qgroup_info_referenced(info);
+	bq->info.referenced_compressed =
+			btrfs_stack_qgroup_info_referenced_compressed(info);
+	bq->info.exclusive = btrfs_stack_qgroup_info_exclusive(info);
+	bq->info.exclusive_compressed =
+			btrfs_stack_qgroup_info_exclusive_compressed(info);
 
 	return 0;
 }

@@ -762,11 +756,14 @@ static int update_qgroup_limit(int fd, struct qgroup_lookup *qgroup_lookup,
 	if (IS_ERR_OR_NULL(bq))
 		return PTR_ERR(bq);
 
-	bq->flags = btrfs_stack_qgroup_limit_flags(limit);
-	bq->max_rfer = btrfs_stack_qgroup_limit_max_referenced(limit);
-	bq->max_excl = btrfs_stack_qgroup_limit_max_exclusive(limit);
-	bq->rsv_rfer = btrfs_stack_qgroup_limit_rsv_referenced(limit);
-	bq->rsv_excl = btrfs_stack_qgroup_limit_rsv_exclusive(limit);
+	bq->limit.flags = btrfs_stack_qgroup_limit_flags(limit);
+	bq->limit.max_referenced =
+			btrfs_stack_qgroup_limit_max_referenced(limit);
+	bq->limit.max_exclusive =
+			btrfs_stack_qgroup_limit_max_exclusive(limit);
+	bq->limit.rsv_referenced =
+			btrfs_stack_qgroup_limit_rsv_referenced(limit);
+	bq->limit.rsv_exclusive = btrfs_stack_qgroup_limit_rsv_exclusive(limit);
 
 	return 0;
 }

@@ -1057,22 +1054,22 @@ static void __update_columns_max_len(struct btrfs_qgroup *bq,
 			btrfs_qgroup_columns[column].max_len = len;
 		break;
 	case BTRFS_QGROUP_RFER:
-		len = strlen(pretty_size_mode(bq->rfer, unit_mode));
+		len = strlen(pretty_size_mode(bq->info.referenced, unit_mode));
 		if (btrfs_qgroup_columns[column].max_len < len)
 			btrfs_qgroup_columns[column].max_len = len;
 		break;
 	case BTRFS_QGROUP_EXCL:
-		len = strlen(pretty_size_mode(bq->excl, unit_mode));
+		len = strlen(pretty_size_mode(bq->info.exclusive, unit_mode));
 		if (btrfs_qgroup_columns[column].max_len < len)
 			btrfs_qgroup_columns[column].max_len = len;
 		break;
 	case BTRFS_QGROUP_MAX_RFER:
-		len = strlen(pretty_size_mode(bq->max_rfer, unit_mode));
+		len = strlen(pretty_size_mode(bq->limit.max_referenced, unit_mode));
 		if (btrfs_qgroup_columns[column].max_len < len)
 			btrfs_qgroup_columns[column].max_len = len;
 		break;
 	case BTRFS_QGROUP_MAX_EXCL:
-		len = strlen(pretty_size_mode(bq->max_excl, unit_mode));
+		len = strlen(pretty_size_mode(bq->limit.max_exclusive, unit_mode));
 		if (btrfs_qgroup_columns[column].max_len < len)
 			btrfs_qgroup_columns[column].max_len = len;
 		break;

@@ -1367,27 +1364,27 @@ static bool export_one_qgroup(json_object *container,
 		goto failure;
 	json_object_object_add(obj, "qgroupid_raw", tmp);
 
-	tmp = export_one_u64(qgroup->generation, compat);
+	tmp = export_one_u64(qgroup->info.generation, compat);
 	if (!tmp)
 		goto failure;
 	json_object_object_add(obj, "generation", tmp);
 
-	tmp = export_one_u64(qgroup->rfer, compat);
+	tmp = export_one_u64(qgroup->info.referenced, compat);
 	if (!tmp)
 		goto failure;
 	json_object_object_add(obj, "referenced_bytes", tmp);
 
-	tmp = export_one_u64(qgroup->excl, compat);
+	tmp = export_one_u64(qgroup->info.exclusive, compat);
 	if (!tmp)
 		goto failure;
 	json_object_object_add(obj, "exclusive_bytes", tmp);
 
-	tmp = export_one_u64(qgroup->max_rfer, compat);
+	tmp = export_one_u64(qgroup->limit.max_referenced, compat);
 	if (!tmp)
 		goto failure;
 	json_object_object_add(obj, "referenced_limit_bytes", tmp);
 
-	tmp = export_one_u64(qgroup->max_excl, compat);
+	tmp = export_one_u64(qgroup->limit.max_exclusive, compat);
 	if (!tmp)
 		goto failure;
 	json_object_object_add(obj, "exclusive_limit_bytes", tmp);

index 94717b67..e11bbef3 100644
@@ -79,6 +79,14 @@ enum btrfs_qgroup_filter_enum {
 	BTRFS_QGROUP_FILTER_MAX,
 };
 
+struct btrfs_qgroup_info {
+	u64 generation;
+	u64 referenced;
+	u64 referenced_compressed;
+	u64 exclusive;
+	u64 exclusive_compressed;
+};
+
 int btrfs_qgroup_parse_sort_string(const char *opt_arg,
 				struct btrfs_qgroup_comparer_set **comps);
 int btrfs_show_qgroups(int fd, struct btrfs_qgroup_filter_set *,

index b1be3311..2d0a6947 100644
@@ -1146,11 +1146,11 @@ static inline void print_status_flag_warning(u64 flags)
 		warning("qgroup data inconsistent, rescan recommended");
 }
 
-static int __qgroups_search(int fd, struct qgroup_lookup *qgroup_lookup)
+static int __qgroups_search(int fd, struct btrfs_ioctl_search_args *args,
+			    struct qgroup_lookup *qgroup_lookup)
 {
 	int ret;
-	struct btrfs_ioctl_search_args args;
-	struct btrfs_ioctl_search_key *sk = &args.key;
+	struct btrfs_ioctl_search_key *sk = &args->key;
 	struct btrfs_ioctl_search_header *sh;
 	unsigned long off = 0;
 	unsigned int i;

@@ -1161,30 +1161,12 @@ static int __qgroups_search(int fd, struct qgroup_lookup *qgroup_lookup)
 	u64 qgroupid;
 	u64 qgroupid1;
 
-	memset(&args, 0, sizeof(args));
-
-	sk->tree_id = BTRFS_QUOTA_TREE_OBJECTID;
-	sk->max_type = BTRFS_QGROUP_RELATION_KEY;
-	sk->min_type = BTRFS_QGROUP_STATUS_KEY;
-	sk->max_objectid = (u64)-1;
-	sk->max_offset = (u64)-1;
-	sk->max_transid = (u64)-1;
-	sk->nr_items = 4096;
-
 	qgroup_lookup_init(qgroup_lookup);
 
 	while (1) {
-		ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
+		ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, args);
 		if (ret < 0) {
-			if (errno == ENOENT) {
-				error("can't list qgroups: quotas not enabled");
-				ret = -ENOTTY;
-			} else {
-				error("can't list qgroups: %s",
-				       strerror(errno));
-				ret = -errno;
-			}
-
+			ret = -errno;
 			break;
 		}
 

@@ -1198,14 +1180,14 @@ static int __qgroups_search(int fd, struct qgroup_lookup *qgroup_lookup)
 		 * read the root_ref item it contains
 		 */
 		for (i = 0; i < sk->nr_items; i++) {
-			sh = (struct btrfs_ioctl_search_header *)(args.buf +
+			sh = (struct btrfs_ioctl_search_header *)(args->buf +
 								  off);
 			off += sizeof(*sh);
 
 			switch (btrfs_search_header_type(sh)) {
 			case BTRFS_QGROUP_STATUS_KEY:
 				si = (struct btrfs_qgroup_status_item *)
-				     (args.buf + off);
+				     (args->buf + off);
 				flags = btrfs_stack_qgroup_status_flags(si);
 
 				print_status_flag_warning(flags);

@@ -1213,7 +1195,7 @@ static int __qgroups_search(int fd, struct qgroup_lookup *qgroup_lookup)
 			case BTRFS_QGROUP_INFO_KEY:
 				qgroupid = btrfs_search_header_offset(sh);
 				info = (struct btrfs_qgroup_info_item *)
-				       (args.buf + off);
+				       (args->buf + off);
 
 				ret = update_qgroup_info(fd, qgroup_lookup,
 							 qgroupid, info);

@@ -1221,7 +1203,7 @@ static int __qgroups_search(int fd, struct qgroup_lookup *qgroup_lookup)
 			case BTRFS_QGROUP_LIMIT_KEY:
 				qgroupid = btrfs_search_header_offset(sh);
 				limit = (struct btrfs_qgroup_limit_item *)
-					(args.buf + off);
+					(args->buf + off);
 
 				ret = update_qgroup_limit(fd, qgroup_lookup,
 							  qgroupid, limit);

@@ -1267,6 +1249,66 @@ static int __qgroups_search(int fd, struct qgroup_lookup *qgroup_lookup)
 	return ret;
 }
 
+static int qgroups_search_all(int fd, struct qgroup_lookup *qgroup_lookup)
+{
+	struct btrfs_ioctl_search_args args = {
+		.key = {
+			.tree_id = BTRFS_QUOTA_TREE_OBJECTID,
+			.max_type = BTRFS_QGROUP_RELATION_KEY,
+			.min_type = BTRFS_QGROUP_STATUS_KEY,
+			.max_objectid = (u64)-1,
+			.max_offset = (u64)-1,
+			.max_transid = (u64)-1,
+			.nr_items = 4096,
+		},
+	};
+	int ret;
+
+	ret = __qgroups_search(fd, &args, qgroup_lookup);
+	if (ret == -ENOTTY)
+		error("can't list qgroups: quotas not enabled");
+	else if (ret < 0)
+		error("can't list qgroups: %s", strerror(-ret));
+	return ret;
+}
+
+int btrfs_qgroup_query(int fd, u64 qgroupid, struct btrfs_qgroup_stats *stats)
+{
+	struct btrfs_ioctl_search_args args = {
+		.key = {
+			.tree_id = BTRFS_QUOTA_TREE_OBJECTID,
+			.min_type = BTRFS_QGROUP_INFO_KEY,
+			.max_type = BTRFS_QGROUP_LIMIT_KEY,
+			.max_objectid = 0,
+			.max_offset = qgroupid,
+			.max_transid = (u64)-1,
+			.nr_items = 4096, /* should be 2, i think */
+		},
+	};
+	struct qgroup_lookup qgroup_lookup;
+	struct btrfs_qgroup *qgroup;
+	struct rb_node *n;
+	int ret;
+
+	ret = __qgroups_search(fd, &args, &qgroup_lookup);
+	if (ret < 0)
+		return ret;
+
+	ret = -ENODATA;
+	n = rb_first(&qgroup_lookup.root);
+	if (n) {
+		qgroup = rb_entry(n, struct btrfs_qgroup, rb_node);
+		stats->qgroupid = qgroup->qgroupid;
+		stats->info = qgroup->info;
+		stats->limit = qgroup->limit;
+
+		ret = 0;
+	}
+
+	__free_all_qgroups(&qgroup_lookup);
+	return ret;
+}
+
 static void print_all_qgroups(struct qgroup_lookup *qgroup_lookup, bool verbose)
 {
 

@@ -1293,7 +1335,7 @@ int btrfs_show_qgroups(int fd,
 	struct qgroup_lookup sort_tree;
 	int ret;
 
-	ret = __qgroups_search(fd, &qgroup_lookup);
+	ret = qgroups_search_all(fd, &qgroup_lookup);
 	if (ret)
 		return ret;
 	__filter_and_sort_qgroups(&qgroup_lookup, &sort_tree,

index 5e71349c..688f92b2 100644
@@ -87,6 +87,12 @@ struct btrfs_qgroup_info {
 	u64 exclusive_compressed;
 };
 
+struct btrfs_qgroup_stats {
+	u64 qgroupid;
+	struct btrfs_qgroup_info info;
+	struct btrfs_qgroup_limit limit;
+};
+
 int btrfs_qgroup_parse_sort_string(const char *opt_arg,
 				struct btrfs_qgroup_comparer_set **comps);
 int btrfs_show_qgroups(int fd, struct btrfs_qgroup_filter_set *,

@@ -105,4 +111,5 @@ int qgroup_inherit_add_group(struct btrfs_qgroup_inherit **inherit, char *arg);
 int qgroup_inherit_add_copy(struct btrfs_qgroup_inherit **inherit, char *arg,
 			    int type);
 
+int btrfs_qgroup_query(int fd, u64 qgroupid, struct btrfs_qgroup_stats *stats);
 #endif

index 8a473f7a..29d0e0e5 100644
@@ -972,6 +972,7 @@ static const char * const cmd_subvol_show_usage[] = {
 	"Show more information about the subvolume",
 	"-r|--rootid   rootid of the subvolume",
 	"-u|--uuid     uuid of the subvolume",
+	HELPINFO_UNITS_SHORT_LONG,
 	"",
 	"If no option is specified, <subvol-path> will be shown, otherwise",
 	"the rootid or uuid are resolved relative to the <mnt> path.",

@@ -993,6 +994,13 @@ static int cmd_subvol_show(int argc, char **argv)
 	int by_uuid = 0;
 	u64 rootid_arg;
 	u8 uuid_arg[BTRFS_UUID_SIZE];
+	struct btrfs_qgroup_stats stats;
+	unsigned int unit_mode;
+	const char *referenced_size;
+	const char *referenced_limit_size = "-";
+	unsigned field_width = 0;
+
+	unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
 
 	while (1) {
 		int c;

@@ -1112,6 +1120,44 @@ static int cmd_subvol_show(int argc, char **argv)
 	btrfs_list_subvols_print(fd, filter_set, NULL, BTRFS_LIST_LAYOUT_RAW,
 			1, raw_prefix);
 
+	ret = btrfs_qgroup_query(fd, get_ri.root_id, &stats);
+	if (ret < 0) {
+		if (ret == -ENODATA)
+			printf("Quotas must be enabled for per-subvolume usage\n");
+		else if (ret != -ENOTTY)
+			fprintf(stderr,
+				"\nERROR: BTRFS_IOC_QUOTA_QUERY failed: %s\n",
+				strerror(errno));
+		goto out;
+	}
+
+	printf("\tQuota Usage:\t\t");
+	fflush(stdout);
+
+	referenced_size = pretty_size_mode(stats.info.referenced, unit_mode);
+	if (stats.limit.max_referenced)
+	       referenced_limit_size = pretty_size_mode(
+						stats.limit.max_referenced,
+						unit_mode);
+	field_width = max(strlen(referenced_size),
+			  strlen(referenced_limit_size));
+
+	printf("%-*s referenced, %s exclusive\n ", field_width,
+	       referenced_size,
+	       pretty_size_mode(stats.info.exclusive, unit_mode));
+
+	printf("\tQuota Limits:\t\t");
+	if (stats.limit.max_referenced || stats.limit.max_exclusive) {
+		const char *excl = "-";
+
+		if (stats.limit.max_exclusive)
+		       excl = pretty_size_mode(stats.limit.max_exclusive,
+					       unit_mode);
+		printf("%-*s referenced, %s exclusive\n", field_width,
+		       referenced_limit_size, excl);
+	} else
+		printf("None\n");
+
 out:
 	/* clean up */
 	free(get_ri.path);

index 7ec12ec1..f632a45c 100644
@@ -1150,11 +1150,11 @@ static inline void print_status_flag_warning(u64 flags)
 		warning("qgroup data inconsistent, rescan recommended");
 }
 
-static int __qgroups_search(int fd, struct qgroup_lookup *qgroup_lookup)
+static int __qgroups_search(int fd, struct btrfs_ioctl_search_args *args,
+			    struct qgroup_lookup *qgroup_lookup)
 {
 	int ret;
-	struct btrfs_ioctl_search_args args;
-	struct btrfs_ioctl_search_key *sk = &args.key;
+	struct btrfs_ioctl_search_key *sk = &args->key;
 	struct btrfs_ioctl_search_header *sh;
 	unsigned long off = 0;
 	unsigned int i;

@@ -1165,30 +1165,12 @@ static int __qgroups_search(int fd, struct qgroup_lookup *qgroup_lookup)
 	u64 qgroupid;
 	u64 qgroupid1;
 
-	memset(&args, 0, sizeof(args));
-
-	sk->tree_id = BTRFS_QUOTA_TREE_OBJECTID;
-	sk->max_type = BTRFS_QGROUP_RELATION_KEY;
-	sk->min_type = BTRFS_QGROUP_STATUS_KEY;
-	sk->max_objectid = (u64)-1;
-	sk->max_offset = (u64)-1;
-	sk->max_transid = (u64)-1;
-	sk->nr_items = 4096;
-
 	qgroup_lookup_init(qgroup_lookup);
 
 	while (1) {
-		ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
+		ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, args);
 		if (ret < 0) {
-			if (errno == ENOENT) {
-				error("can't list qgroups: quotas not enabled");
-				ret = -ENOTTY;
-			} else {
-				error("can't list qgroups: %s",
-				       strerror(errno));
-				ret = -errno;
-			}
-
+			ret = -errno;
 			break;
 		}
 

@@ -1202,14 +1184,14 @@ static int __qgroups_search(int fd, struct qgroup_lookup *qgroup_lookup)
 		 * read the root_ref item it contains
 		 */
 		for (i = 0; i < sk->nr_items; i++) {
-			sh = (struct btrfs_ioctl_search_header *)(args.buf +
+			sh = (struct btrfs_ioctl_search_header *)(args->buf +
 								  off);
 			off += sizeof(*sh);
 
 			switch (btrfs_search_header_type(sh)) {
 			case BTRFS_QGROUP_STATUS_KEY:
 				si = (struct btrfs_qgroup_status_item *)
-				     (args.buf + off);
+				     (args->buf + off);
 				flags = btrfs_stack_qgroup_status_flags(si);
 
 				print_status_flag_warning(flags);

@@ -1217,7 +1199,7 @@ static int __qgroups_search(int fd, struct qgroup_lookup *qgroup_lookup)
 			case BTRFS_QGROUP_INFO_KEY:
 				qgroupid = btrfs_search_header_offset(sh);
 				info = (struct btrfs_qgroup_info_item *)
-				       (args.buf + off);
+				       (args->buf + off);
 
 				ret = update_qgroup_info(fd, qgroup_lookup,
 							 qgroupid, info);

@@ -1225,7 +1207,7 @@ static int __qgroups_search(int fd, struct qgroup_lookup *qgroup_lookup)
 			case BTRFS_QGROUP_LIMIT_KEY:
 				qgroupid = btrfs_search_header_offset(sh);
 				limit = (struct btrfs_qgroup_limit_item *)
-					(args.buf + off);
+					(args->buf + off);
 
 				ret = update_qgroup_limit(fd, qgroup_lookup,
 							  qgroupid, limit);

@@ -1271,6 +1253,66 @@ static int __qgroups_search(int fd, struct qgroup_lookup *qgroup_lookup)
 	return ret;
 }
 
+static int qgroups_search_all(int fd, struct qgroup_lookup *qgroup_lookup)
+{
+	struct btrfs_ioctl_search_args args = {
+		.key = {
+			.tree_id = BTRFS_QUOTA_TREE_OBJECTID,
+			.max_type = BTRFS_QGROUP_RELATION_KEY,
+			.min_type = BTRFS_QGROUP_STATUS_KEY,
+			.max_objectid = (u64)-1,
+			.max_offset = (u64)-1,
+			.max_transid = (u64)-1,
+			.nr_items = 4096,
+		},
+	};
+	int ret;
+
+	ret = __qgroups_search(fd, &args, qgroup_lookup);
+	if (ret == -ENOTTY)
+		error("can't list qgroups: quotas not enabled");
+	else if (ret < 0)
+		error("can't list qgroups: %s", strerror(-ret));
+	return ret;
+}
+
+int btrfs_qgroup_query(int fd, u64 qgroupid, struct btrfs_qgroup_stats *stats)
+{
+	struct btrfs_ioctl_search_args args = {
+		.key = {
+			.tree_id = BTRFS_QUOTA_TREE_OBJECTID,
+			.min_type = BTRFS_QGROUP_INFO_KEY,
+			.max_type = BTRFS_QGROUP_LIMIT_KEY,
+			.max_objectid = 0,
+			.max_offset = qgroupid,
+			.max_transid = (u64)-1,
+			.nr_items = 4096, /* should be 2, i think */
+		},
+	};
+	struct qgroup_lookup qgroup_lookup;
+	struct btrfs_qgroup *qgroup;
+	struct rb_node *n;
+	int ret;
+
+	ret = __qgroups_search(fd, &args, &qgroup_lookup);
+	if (ret < 0)
+		return ret;
+
+	ret = -ENODATA;
+	n = rb_first(&qgroup_lookup.root);
+	if (n) {
+		qgroup = rb_entry(n, struct btrfs_qgroup, rb_node);
+		stats->qgroupid = qgroup->qgroupid;
+		stats->info = qgroup->info;
+		stats->limit = qgroup->limit;
+
+		ret = 0;
+	}
+
+	__free_all_qgroups(&qgroup_lookup);
+	return ret;
+}
+
 static void print_all_qgroups(struct qgroup_lookup *qgroup_lookup, bool verbose)
 {
 

@@ -1297,7 +1339,7 @@ int btrfs_show_qgroups(int fd,
 	struct qgroup_lookup sort_tree;
 	int ret;
 
-	ret = __qgroups_search(fd, &qgroup_lookup);
+	ret = qgroups_search_all(fd, &qgroup_lookup);
 	if (ret)
 		return ret;
 	__filter_and_sort_qgroups(&qgroup_lookup, &sort_tree,

@@ -1500,7 +1542,7 @@ int btrfs_export_qgroups_json(int fd,
 	struct qgroup_lookup sort_tree;
 	int ret = 0;
 
-	ret = __qgroups_search(fd, &qgroup_lookup);
+	ret = qgroups_search_all(fd, &qgroup_lookup);
 	if (ret)
 		return ret;
 	__filter_and_sort_qgroups(&qgroup_lookup, &sort_tree,

index e11bbef3..2883727b 100644
@@ -87,6 +87,12 @@ struct btrfs_qgroup_info {
 	u64 exclusive_compressed;
 };
 
+struct btrfs_qgroup_stats {
+	u64 qgroupid;
+	struct btrfs_qgroup_info info;
+	struct btrfs_qgroup_limit limit;
+};
+
 int btrfs_qgroup_parse_sort_string(const char *opt_arg,
 				struct btrfs_qgroup_comparer_set **comps);
 int btrfs_show_qgroups(int fd, struct btrfs_qgroup_filter_set *,

@@ -108,4 +114,5 @@ int qgroup_inherit_add_group(struct btrfs_qgroup_inherit **inherit, char *arg);
 int qgroup_inherit_add_copy(struct btrfs_qgroup_inherit **inherit, char *arg,
 			    int type);
 
+int btrfs_qgroup_query(int fd, u64 qgroupid, struct btrfs_qgroup_stats *stats);
 #endif

index 8a473f7a..29d0e0e5 100644
@@ -972,6 +972,7 @@ static const char * const cmd_subvol_show_usage[] = {
 	"Show more information about the subvolume",
 	"-r|--rootid   rootid of the subvolume",
 	"-u|--uuid     uuid of the subvolume",
+	HELPINFO_UNITS_SHORT_LONG,
 	"",
 	"If no option is specified, <subvol-path> will be shown, otherwise",
 	"the rootid or uuid are resolved relative to the <mnt> path.",

@@ -993,6 +994,13 @@ static int cmd_subvol_show(int argc, char **argv)
 	int by_uuid = 0;
 	u64 rootid_arg;
 	u8 uuid_arg[BTRFS_UUID_SIZE];
+	struct btrfs_qgroup_stats stats;
+	unsigned int unit_mode;
+	const char *referenced_size;
+	const char *referenced_limit_size = "-";
+	unsigned field_width = 0;
+
+	unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
 
 	while (1) {
 		int c;

@@ -1112,6 +1120,44 @@ static int cmd_subvol_show(int argc, char **argv)
 	btrfs_list_subvols_print(fd, filter_set, NULL, BTRFS_LIST_LAYOUT_RAW,
 			1, raw_prefix);
 
+	ret = btrfs_qgroup_query(fd, get_ri.root_id, &stats);
+	if (ret < 0) {
+		if (ret == -ENODATA)
+			printf("Quotas must be enabled for per-subvolume usage\n");
+		else if (ret != -ENOTTY)
+			fprintf(stderr,
+				"\nERROR: BTRFS_IOC_QUOTA_QUERY failed: %s\n",
+				strerror(errno));
+		goto out;
+	}
+
+	printf("\tQuota Usage:\t\t");
+	fflush(stdout);
+
+	referenced_size = pretty_size_mode(stats.info.referenced, unit_mode);
+	if (stats.limit.max_referenced)
+	       referenced_limit_size = pretty_size_mode(
+						stats.limit.max_referenced,
+						unit_mode);
+	field_width = max(strlen(referenced_size),
+			  strlen(referenced_limit_size));
+
+	printf("%-*s referenced, %s exclusive\n ", field_width,
+	       referenced_size,
+	       pretty_size_mode(stats.info.exclusive, unit_mode));
+
+	printf("\tQuota Limits:\t\t");
+	if (stats.limit.max_referenced || stats.limit.max_exclusive) {
+		const char *excl = "-";
+
+		if (stats.limit.max_exclusive)
+		       excl = pretty_size_mode(stats.limit.max_exclusive,
+					       unit_mode);
+		printf("%-*s referenced, %s exclusive\n", field_width,
+		       referenced_limit_size, excl);
+	} else
+		printf("None\n");
+
 out:
 	/* clean up */
 	free(get_ri.path);

index 94cd0fd3..eee15ef1 100644
@@ -282,6 +282,10 @@ static const char * const cmd_qgroup_show_usage[] = {
 	"               (excluding ancestral qgroups)",
 	"-P             print first-level qgroups using pathname",
 	"-v             verbose, prints all nested subvolumes",
+#ifdef HAVE_JSON
+	"-j             export in JSON format",
+	"--json-compat  export in JSON compatibility mode",
+#endif
 	HELPINFO_UNITS_LONG,
 	"--sort=qgroupid,rfer,excl,max_rfer,max_excl,pathname",
 	"               list qgroups sorted by specified items",

@@ -302,6 +306,8 @@ static int cmd_qgroup_show(int argc, char **argv)
 	unsigned unit_mode;
 	int sync = 0;
 	bool verbose = false;
+	bool export_json = false;
+	bool compat_json = false;
 
 	struct btrfs_qgroup_comparer_set *comparer_set;
 	struct btrfs_qgroup_filter_set *filter_set;

@@ -314,16 +320,26 @@ static int cmd_qgroup_show(int argc, char **argv)
 		int c;
 		enum {
 			GETOPT_VAL_SORT = 256,
-			GETOPT_VAL_SYNC
+			GETOPT_VAL_SYNC,
+			GETOPT_VAL_JSCOMPAT,
 		};
 		static const struct option long_options[] = {
 			{"sort", required_argument, NULL, GETOPT_VAL_SORT},
 			{"sync", no_argument, NULL, GETOPT_VAL_SYNC},
 			{"verbose", no_argument, NULL, 'v'},
+#ifdef HAVE_JSON
+			{"json-compat", no_argument, NULL, GETOPT_VAL_JSCOMPAT},
+#endif
 			{ NULL, 0, NULL, 0 }
 		};
-
-		c = getopt_long(argc, argv, "pPcreFfv", long_options, NULL);
+		const char getopt_chars[] = {
+			'p', 'P', 'c', 'r', 'e', 'F', 'f', 'v',
+#ifdef HAVE_JSON
+			'j',
+#endif
+			'\0' };
+
+		c = getopt_long(argc, argv, getopt_chars, long_options, NULL);
 		if (c < 0)
 			break;
 		switch (c) {

@@ -353,6 +369,14 @@ static int cmd_qgroup_show(int argc, char **argv)
 		case 'f':
 			filter_flag |= 0x2;
 			break;
+#ifdef HAVE_JSON
+		case GETOPT_VAL_JSCOMPAT:
+			compat_json = true;
+		case 'j':
+			unit_mode = UNITS_RAW;
+			export_json = true;
+			break;
+#endif
 		case GETOPT_VAL_SORT:
 			ret = btrfs_qgroup_parse_sort_string(optarg,
 							     &comparer_set);

@@ -405,7 +429,11 @@ static int cmd_qgroup_show(int argc, char **argv)
 					BTRFS_QGROUP_FILTER_PARENT,
 					qgroupid);
 	}
-	ret = btrfs_show_qgroups(fd, filter_set, comparer_set, verbose);
+	if (export_json)
+		ret = btrfs_export_qgroups_json(fd, filter_set, comparer_set,
+						compat_json);
+	else
+		ret = btrfs_show_qgroups(fd, filter_set, comparer_set, verbose);
 	close_file_or_dir(fd, dirstream);
 	free(filter_set);
 	free(comparer_set);

229 lines not on this page · raw message

index 688f92b2..2883727b 100644
@@ -97,6 +97,9 @@ int btrfs_qgroup_parse_sort_string(const char *opt_arg,
 				struct btrfs_qgroup_comparer_set **comps);
 int btrfs_show_qgroups(int fd, struct btrfs_qgroup_filter_set *,
 		       struct btrfs_qgroup_comparer_set *, bool verbose);
+int btrfs_export_qgroups_json(int fd, struct btrfs_qgroup_filter_set *,
+			      struct btrfs_qgroup_comparer_set *,
+			      bool compat);
 void btrfs_qgroup_setup_print_column(enum btrfs_qgroup_column_enum column);
 void btrfs_qgroup_setup_units(unsigned unit_mode);
 struct btrfs_qgroup_filter_set *btrfs_qgroup_alloc_filter_set(void);