This is a copy of non-merged following patch originally written
by Omar Sandoval:
btrfs-progs: use libbtrfsutil for subvolume list
expect this commit keeps libbtrfs implementation which above commit
tries to remove (therefore this adds suffix _v2 for struct/function).
Original Author: Omar Sandoval <osan...@fb.com>
Signed-off-by: Misono Tomohiro <misono.tomoh...@jp.fujitsu.com>
---
cmds-subvolume.c | 963 +++++++++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 936 insertions(+), 27 deletions(-)
diff --git a/cmds-subvolume.c b/cmds-subvolume.c
index 45363a5a..c54a8003 100644
--- a/cmds-subvolume.c
+++ b/cmds-subvolume.c
@@ -404,6 +404,915 @@ keep_fd:
return ret;
}
+#define BTRFS_LIST_NFILTERS_INCREASE (2 * BTRFS_LIST_FILTER_MAX)
+#define BTRFS_LIST_NCOMPS_INCREASE (2 * BTRFS_LIST_COMP_MAX)
+
+struct listed_subvol {
+ struct btrfs_util_subvolume_info info;
+ char *path;
+};
+
+struct subvol_list {
+ size_t num;
+ struct listed_subvol subvols[];
+};
+
+typedef int (*btrfs_list_filter_func_v2)(struct listed_subvol *, uint64_t);
+typedef int (*btrfs_list_comp_func_v2)(const struct listed_subvol *,
+ const struct listed_subvol *,
+ int);
+
+struct btrfs_list_filter_v2 {
+ btrfs_list_filter_func_v2 filter_func;
+ u64 data;
+};
+
+struct btrfs_list_comparer_v2 {
+ btrfs_list_comp_func_v2 comp_func;
+ int is_descending;
+};
+
+struct btrfs_list_filter_set_v2 {
+ int total;
+ int nfilters;
+ int only_deleted;
+ struct btrfs_list_filter_v2 filters[0];
+};
+
+struct btrfs_list_comparer_set_v2 {
+ int total;
+ int ncomps;
+ struct btrfs_list_comparer_v2 comps[0];
+};
+
+static struct {
+ char *name;
+ char *column_name;
+ int need_print;
+} btrfs_list_columns[] = {
+ {
+ .name = "ID",
+ .column_name = "ID",
+ .need_print = 0,
+ },
+ {
+ .name = "gen",
+ .column_name = "Gen",
+ .need_print = 0,
+ },
+ {
+ .name = "cgen",
+ .column_name = "CGen",
+ .need_print = 0,
+ },
+ {
+ .name = "parent",
+ .column_name = "Parent",
+ .need_print = 0,
+ },
+ {
+ .name = "top level",
+ .column_name = "Top Level",
+ .need_print = 0,
+ },
+ {
+ .name = "otime",
+ .column_name = "OTime",
+ .need_print = 0,
+ },
+ {
+ .name = "parent_uuid",
+ .column_name = "Parent UUID",
+ .need_print = 0,
+ },
+ {
+ .name = "received_uuid",
+ .column_name = "Received UUID",
+ .need_print = 0,
+ },
+ {
+ .name = "uuid",
+ .column_name = "UUID",
+ .need_print = 0,
+ },
+ {
+ .name = "path",
+ .column_name = "Path",
+ .need_print = 0,
+ },
+ {
+ .name = NULL,
+ .column_name = NULL,
+ .need_print = 0,
+ },
+};
+
+static btrfs_list_filter_func_v2 all_filter_funcs[];
+static btrfs_list_comp_func_v2 all_comp_funcs[];
+
+static void btrfs_list_setup_print_column_v2(enum btrfs_list_column_enum
column)
+{
+ int i;
+
+ ASSERT(0 <= column && column <= BTRFS_LIST_ALL);
+
+ if (column < BTRFS_LIST_ALL) {
+ btrfs_list_columns[column].need_print = 1;
+ return;
+ }
+
+ for (i = 0; i < BTRFS_LIST_ALL; i++)
+ btrfs_list_columns[i].need_print = 1;
+}
+
+static int comp_entry_with_rootid_v2(const struct listed_subvol *entry1,
+ const struct listed_subvol *entry2,
+ int is_descending)
+{
+ int ret;
+
+ if (entry1->info.id > entry2->info.id)
+ ret = 1;
+ else if (entry1->info.id < entry2->info.id)
+ ret = -1;
+ else
+ ret = 0;
+
+ return is_descending ? -ret : ret;
+}
+
+static int comp_entry_with_gen_v2(const struct listed_subvol *entry1,
+ const struct listed_subvol *entry2,
+ int is_descending)
+{
+ int ret;
+
+ if (entry1->info.generation > entry2->info.generation)
+ ret = 1;
+ else if (entry1->info.generation < entry2->info.generation)
+ ret = -1;
+ else
+ ret = 0;
+
+ return is_descending ? -ret : ret;
+}
+
+static int comp_entry_with_ogen_v2(const struct listed_subvol *entry1,
+ const struct listed_subvol *entry2,
+ int is_descending)
+{
+ int ret;
+
+ if (entry1->info.otransid > entry2->info.otransid)
+ ret = 1;
+ else if (entry1->info.otransid < entry2->info.otransid)
+ ret = -1;
+ else
+ ret = 0;
+
+ return is_descending ? -ret : ret;
+}
+
+static int comp_entry_with_path_v2(const struct listed_subvol *entry1,
+ const struct listed_subvol *entry2,
+ int is_descending)
+{
+ int ret;
+
+ if (strcmp(entry1->path, entry2->path) > 0)
+ ret = 1;
+ else if (strcmp(entry1->path, entry2->path) < 0)
+ ret = -1;
+ else
+ ret = 0;
+
+ return is_descending ? -ret : ret;
+}
+
+static btrfs_list_comp_func_v2 all_comp_funcs[] = {
+ [BTRFS_LIST_COMP_ROOTID] = comp_entry_with_rootid_v2,
+ [BTRFS_LIST_COMP_OGEN] = comp_entry_with_ogen_v2,
+ [BTRFS_LIST_COMP_GEN] = comp_entry_with_gen_v2,
+ [BTRFS_LIST_COMP_PATH] = comp_entry_with_path_v2,
+};
+
+static char *all_sort_items[] = {
+ [BTRFS_LIST_COMP_ROOTID] = "rootid",
+ [BTRFS_LIST_COMP_OGEN] = "ogen",
+ [BTRFS_LIST_COMP_GEN] = "gen",
+ [BTRFS_LIST_COMP_PATH] = "path",
+ [BTRFS_LIST_COMP_MAX] = NULL,
+};
+
+static int btrfs_list_get_sort_item(char *sort_name)
+{
+ int i;
+
+ for (i = 0; i < BTRFS_LIST_COMP_MAX; i++) {
+ if (strcmp(sort_name, all_sort_items[i]) == 0)
+ return i;
+ }
+ return -1;
+}
+
+static struct btrfs_list_comparer_set_v2
*btrfs_list_alloc_comparer_set_v2(void)
+{
+ struct btrfs_list_comparer_set_v2 *set;
+ int size;
+
+ size = sizeof(struct btrfs_list_comparer_set_v2) +
+ BTRFS_LIST_NCOMPS_INCREASE *
+ sizeof(struct btrfs_list_comparer_v2);
+ set = calloc(1, size);
+ if (!set) {
+ fprintf(stderr, "memory allocation failed\n");
+ exit(1);
+ }
+
+ set->total = BTRFS_LIST_NCOMPS_INCREASE;
+
+ return set;
+}
+
+static int btrfs_list_setup_comparer_v2(struct btrfs_list_comparer_set_v2
**comp_set,
+ enum btrfs_list_comp_enum comparer,
+ int is_descending)
+{
+ struct btrfs_list_comparer_set_v2 *set = *comp_set;
+ int size;
+
+ ASSERT(set != NULL);
+ ASSERT(comparer < BTRFS_LIST_COMP_MAX);
+ ASSERT(set->ncomps <= set->total);
+
+ if (set->ncomps == set->total) {
+ void *tmp;
+
+ size = set->total + BTRFS_LIST_NCOMPS_INCREASE;
+ size = sizeof(*set) +
+ size * sizeof(struct btrfs_list_comparer_v2);
+ tmp = set;
+ set = realloc(set, size);
+ if (!set) {
+ fprintf(stderr, "memory allocation failed\n");
+ free(tmp);
+ exit(1);
+ }
+
+ memset(&set->comps[set->total], 0,
+ BTRFS_LIST_NCOMPS_INCREASE *
+ sizeof(struct btrfs_list_comparer_v2));
+ set->total += BTRFS_LIST_NCOMPS_INCREASE;
+ *comp_set = set;
+ }
+
+ ASSERT(set->comps[set->ncomps].comp_func == NULL);
+
+ set->comps[set->ncomps].comp_func = all_comp_funcs[comparer];
+ set->comps[set->ncomps].is_descending = is_descending;
+ set->ncomps++;
+ return 0;
+}
+
+static int subvol_comp(const void *entry1, const void *entry2, void *arg)
+{
+ const struct btrfs_list_comparer_set_v2 * const set = arg;
+ int rootid_compared = 0;
+ int ret;
+ int i;
+
+ for (i = 0; set && i < set->ncomps; i++) {
+ if (!set->comps[i].comp_func)
+ break;
+
+ ret = set->comps[i].comp_func(entry1, entry2,
+ set->comps[i].is_descending);
+ if (ret)
+ return ret;
+
+ if (set->comps[i].comp_func == comp_entry_with_rootid_v2)
+ rootid_compared = 1;
+ }
+
+ if (!rootid_compared)
+ return comp_entry_with_rootid_v2(entry1, entry2, 0);
+
+ return 0;
+}
+
+static void sort_subvols(struct btrfs_list_comparer_set_v2 *comp_set,
+ struct subvol_list *subvols)
+{
+ qsort_r(subvols->subvols, subvols->num, sizeof(subvols->subvols[0]),
+ subvol_comp, comp_set);
+}
+
+static int filter_by_rootid(struct listed_subvol *subvol, uint64_t data)
+{
+ return subvol->info.id == data;
+}
+
+static int filter_snapshot(struct listed_subvol *subvol, uint64_t data)
+{
+ return !uuid_is_null(subvol->info.parent_uuid);
+}
+
+static int filter_flags(struct listed_subvol *subvol, uint64_t data)
+{
+ return subvol->info.flags & data;
+}
+
+static int filter_gen_more(struct listed_subvol *subvol, uint64_t data)
+{
+ return subvol->info.generation >= data;
+}
+
+static int filter_gen_less(struct listed_subvol *subvol, uint64_t data)
+{
+ return subvol->info.generation <= data;
+}
+
+static int filter_gen_equal(struct listed_subvol *subvol, uint64_t data)
+{
+ return subvol->info.generation == data;
+}
+
+static int filter_cgen_more(struct listed_subvol *subvol, uint64_t data)
+{
+ return subvol->info.otransid >= data;
+}
+
+static int filter_cgen_less(struct listed_subvol *subvol, uint64_t data)
+{
+ return subvol->info.otransid <= data;
+}
+
+static int filter_cgen_equal(struct listed_subvol *subvol, uint64_t data)
+{
+ return subvol->info.otransid == data;
+}
+
+static int filter_topid_equal(struct listed_subvol *subvol, uint64_t data)
+{
+ /* See the comment in print_subvolume_column() about top level. */
+ return subvol->info.parent_id == data;
+}
+
+static int filter_full_path(struct listed_subvol *subvol, uint64_t data)
+{
+ /*
+ * This implements the same behavior as before the conversion to
+ * libbtrfsutil, which is mostly nonsensical.
+ */
+ if (subvol->info.parent_id != data) {
+ char *tmp;
+ int ret;
+
+ ret = asprintf(&tmp, "<FS_TREE>/%s", subvol->path);
+ if (ret == -1) {
+ error("out of memory");
+ exit(1);
+ }
+
+ free(subvol->path);
+ subvol->path = tmp;
+ }
+ return 1;
+}
+
+static int filter_by_parent(struct listed_subvol *subvol, uint64_t data)
+{
+ return !uuid_compare(subvol->info.parent_uuid,
+ (u8 *)(unsigned long)data);
+}
+
+static btrfs_list_filter_func_v2 all_filter_funcs[] = {
+ [BTRFS_LIST_FILTER_ROOTID] = filter_by_rootid,
+ [BTRFS_LIST_FILTER_SNAPSHOT_ONLY] = filter_snapshot,
+ [BTRFS_LIST_FILTER_FLAGS] = filter_flags,
+ [BTRFS_LIST_FILTER_GEN_MORE] = filter_gen_more,
+ [BTRFS_LIST_FILTER_GEN_LESS] = filter_gen_less,
+ [BTRFS_LIST_FILTER_GEN_EQUAL] = filter_gen_equal,
+ [BTRFS_LIST_FILTER_CGEN_MORE] = filter_cgen_more,
+ [BTRFS_LIST_FILTER_CGEN_LESS] = filter_cgen_less,
+ [BTRFS_LIST_FILTER_CGEN_EQUAL] = filter_cgen_equal,
+ [BTRFS_LIST_FILTER_TOPID_EQUAL] = filter_topid_equal,
+ [BTRFS_LIST_FILTER_FULL_PATH] = filter_full_path,
+ [BTRFS_LIST_FILTER_BY_PARENT] = filter_by_parent,
+};
+
+static struct btrfs_list_filter_set_v2 *btrfs_list_alloc_filter_set_v2(void)
+{
+ struct btrfs_list_filter_set_v2 *set;
+ int size;
+
+ size = sizeof(struct btrfs_list_filter_set_v2) +
+ BTRFS_LIST_NFILTERS_INCREASE *
+ sizeof(struct btrfs_list_filter_v2);
+ set = calloc(1, size);
+ if (!set) {
+ fprintf(stderr, "memory allocation failed\n");
+ exit(1);
+ }
+
+ set->total = BTRFS_LIST_NFILTERS_INCREASE;
+
+ return set;
+}
+
+/*
+ * Setup list filters. Exit if there's not enough memory, as we can't continue
+ * without the structures set up properly.
+ */
+static void btrfs_list_setup_filter_v2(struct btrfs_list_filter_set_v2
**filter_set,
+ enum btrfs_list_filter_enum filter,
+ u64 data)
+{
+ struct btrfs_list_filter_set_v2 *set = *filter_set;
+ int size;
+
+ ASSERT(set != NULL);
+ ASSERT(filter < BTRFS_LIST_FILTER_MAX);
+ ASSERT(set->nfilters <= set->total);
+
+ if (set->nfilters == set->total) {
+ void *tmp;
+
+ size = set->total + BTRFS_LIST_NFILTERS_INCREASE;
+ size = sizeof(*set) +
+ size * sizeof(struct btrfs_list_filter_v2);
+ tmp = set;
+ set = realloc(set, size);
+ if (!set) {
+ fprintf(stderr, "memory allocation failed\n");
+ free(tmp);
+ exit(1);
+ }
+
+ memset(&set->filters[set->total], 0,
+ BTRFS_LIST_NFILTERS_INCREASE *
+ sizeof(struct btrfs_list_filter_v2));
+ set->total += BTRFS_LIST_NFILTERS_INCREASE;
+ *filter_set = set;
+ }
+
+ ASSERT(set->filters[set->nfilters].filter_func == NULL);
+
+ if (filter == BTRFS_LIST_FILTER_DELETED) {
+ set->only_deleted = 1;
+ } else {
+ set->filters[set->nfilters].filter_func =
+ all_filter_funcs[filter];
+ set->filters[set->nfilters].data = data;
+ set->nfilters++;
+ }
+}
+
+static int filters_match(struct listed_subvol *subvol,
+ struct btrfs_list_filter_set_v2 *set)
+{
+ int i, ret;
+
+ if (!set)
+ return 1;
+
+ for (i = 0; i < set->nfilters; i++) {
+ if (!set->filters[i].filter_func)
+ break;
+ ret = set->filters[i].filter_func(subvol, set->filters[i].data);
+ if (!ret)
+ return 0;
+ }
+ return 1;
+}
+
+static void print_subvolume_column(struct listed_subvol *subvol,
+ enum btrfs_list_column_enum column)
+{
+ char tstr[256];
+ char uuidparse[BTRFS_UUID_UNPARSED_SIZE];
+
+ ASSERT(0 <= column && column < BTRFS_LIST_ALL);
+
+ switch (column) {
+ case BTRFS_LIST_OBJECTID:
+ printf("%" PRIu64, subvol->info.id);
+ break;
+ case BTRFS_LIST_GENERATION:
+ printf("%" PRIu64, subvol->info.generation);
+ break;
+ case BTRFS_LIST_OGENERATION:
+ printf("%" PRIu64, subvol->info.otransid);
+ break;
+ case BTRFS_LIST_PARENT:
+ /*
+ * Top level used to mean something else, but since 4f5ebb3ef553
+ * ("Btrfs-progs: fix to make list specified directory's subvolumes
+ * work") it was always set to the parent ID. See
+ * https://www.spinics.net/lists/linux-btrfs/msg69820.html.
+ */
+ case BTRFS_LIST_TOP_LEVEL:
+ printf("%" PRIu64, subvol->info.parent_id);
+ break;
+ case BTRFS_LIST_OTIME:
+ if (subvol->info.otime.tv_sec) {
+ struct tm tm;
+
+ localtime_r(&subvol->info.otime.tv_sec, &tm);
+ strftime(tstr, sizeof(tstr), "%Y-%m-%d %X", &tm);
+ } else
+ strcpy(tstr, "-");
+ printf("%s", tstr);
+ break;
+ case BTRFS_LIST_UUID:
+ if (uuid_is_null(subvol->info.uuid))
+ strcpy(uuidparse, "-");
+ else
+ uuid_unparse(subvol->info.uuid, uuidparse);
+ printf("%-36s", uuidparse);
+ break;
+ case BTRFS_LIST_PUUID:
+ if (uuid_is_null(subvol->info.parent_uuid))
+ strcpy(uuidparse, "-");
+ else
+ uuid_unparse(subvol->info.parent_uuid, uuidparse);
+ printf("%-36s", uuidparse);
+ break;
+ case BTRFS_LIST_RUUID:
+ if (uuid_is_null(subvol->info.received_uuid))
+ strcpy(uuidparse, "-");
+ else
+ uuid_unparse(subvol->info.received_uuid, uuidparse);
+ printf("%-36s", uuidparse);
+ break;
+ case BTRFS_LIST_PATH:
+ printf("%s", subvol->path);
+ break;
+ default:
+ break;
+ }
+}
+
+static void print_one_subvol_info_raw(struct listed_subvol *subvol,
+ const char *raw_prefix)
+{
+ int i;
+
+ for (i = 0; i < BTRFS_LIST_ALL; i++) {
+ if (!btrfs_list_columns[i].need_print)
+ continue;
+
+ if (raw_prefix)
+ printf("%s", raw_prefix);
+
+ print_subvolume_column(subvol, i);
+ }
+ printf("\n");
+}
+
+static void print_one_subvol_info_table(struct listed_subvol *subvol)
+{
+ int i;
+
+ for (i = 0; i < BTRFS_LIST_ALL; i++) {
+ if (!btrfs_list_columns[i].need_print)
+ continue;
+
+ print_subvolume_column(subvol, i);
+
+ if (i != BTRFS_LIST_PATH)
+ printf("\t");
+
+ if (i == BTRFS_LIST_TOP_LEVEL)
+ printf("\t");
+ }
+ printf("\n");
+}
+
+static void print_one_subvol_info_default(struct listed_subvol *subvol)
+{
+ int i;
+
+ for (i = 0; i < BTRFS_LIST_ALL; i++) {
+ if (!btrfs_list_columns[i].need_print)
+ continue;
+
+ printf("%s ", btrfs_list_columns[i].name);
+ print_subvolume_column(subvol, i);
+
+ if (i != BTRFS_LIST_PATH)
+ printf(" ");
+ }
+ printf("\n");
+}
+
+static void print_all_subvol_info_tab_head(void)
+{
+ int i;
+ int len;
+ char barrier[20];
+
+ for (i = 0; i < BTRFS_LIST_ALL; i++) {
+ if (btrfs_list_columns[i].need_print)
+ printf("%s\t", btrfs_list_columns[i].name);
+
+ if (i == BTRFS_LIST_ALL-1)
+ printf("\n");
+ }
+
+ for (i = 0; i < BTRFS_LIST_ALL; i++) {
+ memset(barrier, 0, sizeof(barrier));
+
+ if (btrfs_list_columns[i].need_print) {
+ len = strlen(btrfs_list_columns[i].name);
+ while (len--)
+ strcat(barrier, "-");
+
+ printf("%s\t", barrier);
+ }
+ if (i == BTRFS_LIST_ALL-1)
+ printf("\n");
+ }
+}
+
+static void print_all_subvol_info(struct subvol_list *subvols,
+ enum btrfs_list_layout layout,
+ const char *raw_prefix)
+{
+ size_t i;
+
+ if (layout == BTRFS_LIST_LAYOUT_TABLE)
+ print_all_subvol_info_tab_head();
+
+ for (i = 0; i < subvols->num; i++) {
+ struct listed_subvol *subvol = &subvols->subvols[i];
+
+ switch (layout) {
+ case BTRFS_LIST_LAYOUT_DEFAULT:
+ print_one_subvol_info_default(subvol);
+ break;
+ case BTRFS_LIST_LAYOUT_TABLE:
+ print_one_subvol_info_table(subvol);
+ break;
+ case BTRFS_LIST_LAYOUT_RAW:
+ print_one_subvol_info_raw(subvol, raw_prefix);
+ break;
+ }
+ }
+}
+
+static void free_subvol_list(struct subvol_list *subvols)
+{
+ size_t i;
+
+ if (subvols) {
+ for (i = 0; i < subvols->num; i++)
+ free(subvols->subvols[i].path);
+ free(subvols);
+ }
+}
+
+static struct subvol_list *btrfs_list_deleted_subvols(int fd,
+ struct
btrfs_list_filter_set_v2 *filter_set)
+{
+ struct subvol_list *subvols = NULL;
+ uint64_t *ids = NULL;
+ size_t i, n;
+ enum btrfs_util_error err;
+ int ret = -1;
+
+ err = btrfs_util_deleted_subvolumes_fd(fd, &ids, &n);
+ if (err) {
+ error_btrfs_util(err);
+ return NULL;
+ }
+
+ subvols = malloc(sizeof(*subvols) + n * sizeof(subvols->subvols[0]));
+ if (!subvols) {
+ error("out of memory");
+ goto out;
+ }
+
+ subvols->num = 0;
+ for (i = 0; i < n; i++) {
+ struct listed_subvol *subvol = &subvols->subvols[subvols->num];
+
+ err = btrfs_util_subvolume_info_fd(fd, ids[i], &subvol->info);
+ if (err) {
+ error_btrfs_util(err);
+ goto out;
+ }
+
+ subvol->path = strdup("DELETED");
+ if (!subvol->path)
+ goto out;
+
+ if (!filters_match(subvol, filter_set)) {
+ free(subvol->path);
+ continue;
+ }
+
+ subvols->num++;
+ }
+
+ ret = 0;
+out:
+ if (ret) {
+ free_subvol_list(subvols);
+ subvols = NULL;
+ free(ids);
+ }
+ return subvols;
+}
+
+static struct subvol_list *btrfs_list_subvols(int fd,
+ struct btrfs_list_filter_set_v2
*filter_set)
+{
+ struct subvol_list *subvols;
+ size_t capacity = 0;
+ struct btrfs_util_subvolume_iterator *iter;
+ enum btrfs_util_error err;
+ int ret = -1;
+
+ subvols = malloc(sizeof(*subvols));
+ if (!subvols) {
+ error("out of memory");
+ return NULL;
+ }
+ subvols->num = 0;
+
+ err = btrfs_util_create_subvolume_iterator_fd(fd,
+ BTRFS_FS_TREE_OBJECTID, 0,
+ &iter);
+ if (err) {
+ iter = NULL;
+ error_btrfs_util(err);
+ goto out;
+ }
+
+ for (;;) {
+ struct listed_subvol subvol;
+
+ err = btrfs_util_subvolume_iterator_next_info(iter,
+ &subvol.path,
+ &subvol.info);
+ if (err == BTRFS_UTIL_ERROR_STOP_ITERATION) {
+ break;
+ } else if (err) {
+ error_btrfs_util(err);
+ goto out;
+ }
+
+ if (!filters_match(&subvol, filter_set)) {
+ free(subvol.path);
+ continue;
+ }
+
+ if (subvols->num >= capacity) {
+ struct subvol_list *new_subvols;
+ size_t new_capacity = max_t(size_t, 1, capacity * 2);
+
+ new_subvols = realloc(subvols,
+ sizeof(*new_subvols) +
+ new_capacity *
+ sizeof(new_subvols->subvols[0]));
+ if (!new_subvols) {
+ error("out of memory");
+ goto out;
+ }
+
+ subvols = new_subvols;
+ capacity = new_capacity;
+ }
+
+ subvols->subvols[subvols->num] = subvol;
+ subvols->num++;
+ }
+
+ ret = 0;
+out:
+ if (iter)
+ btrfs_util_destroy_subvolume_iterator(iter);
+ if (ret) {
+ free_subvol_list(subvols);
+ subvols = NULL;
+ }
+ return subvols;
+}
+
+static int btrfs_list_subvols_print_v2(int fd,
+ struct btrfs_list_filter_set_v2 *filter_set,
+ struct btrfs_list_comparer_set_v2 *comp_set,
+ enum btrfs_list_layout layout,
+ int full_path, const char *raw_prefix)
+{
+ struct subvol_list *subvols;
+
+ /*
+ * full_path hasn't done anything since 4f5ebb3ef553 ("Btrfs-progs: fix
+ * to make list specified directory's subvolumes work"). See
+ * https://www.spinics.net/lists/linux-btrfs/msg69820.html
+ */
+
+ if (filter_set->only_deleted)
+ subvols = btrfs_list_deleted_subvols(fd, filter_set);
+ else
+ subvols = btrfs_list_subvols(fd, filter_set);
+ if (!subvols)
+ return -1;
+
+ sort_subvols(comp_set, subvols);
+
+ print_all_subvol_info(subvols, layout, raw_prefix);
+
+ free_subvol_list(subvols);
+
+ return 0;
+}
+
+static int btrfs_list_parse_sort_string_v2(char *opt_arg,
+ struct btrfs_list_comparer_set_v2
**comps)
+{
+ int order;
+ int flag;
+ char *p;
+ char **ptr_argv;
+ int what_to_sort;
+
+ while ((p = strtok(opt_arg, ",")) != NULL) {
+ flag = 0;
+ ptr_argv = all_sort_items;
+
+ while (*ptr_argv) {
+ if (strcmp(*ptr_argv, p) == 0) {
+ flag = 1;
+ break;
+ } else {
+ p++;
+ if (strcmp(*ptr_argv, p) == 0) {
+ flag = 1;
+ p--;
+ break;
+ }
+ p--;
+ }
+ ptr_argv++;
+ }
+
+ if (flag == 0)
+ return -1;
+
+ else {
+ if (*p == '+') {
+ order = 0;
+ p++;
+ } else if (*p == '-') {
+ order = 1;
+ p++;
+ } else
+ order = 0;
+
+ what_to_sort = btrfs_list_get_sort_item(p);
+ btrfs_list_setup_comparer_v2(comps,
+ what_to_sort, order);
+ }
+ opt_arg = NULL;
+ }
+
+ return 0;
+}
+
+static int btrfs_list_parse_filter_string_v2(char *opt_arg,
+ struct btrfs_list_filter_set_v2
**filters,
+ enum btrfs_list_filter_enum type)
+{
+
+ u64 arg;
+
+ switch (*(opt_arg++)) {
+ case '+':
+ arg = arg_strtou64(opt_arg);
+ type += 2;
+
+ btrfs_list_setup_filter_v2(filters, type, arg);
+ break;
+ case '-':
+ arg = arg_strtou64(opt_arg);
+ type += 1;
+
+ btrfs_list_setup_filter_v2(filters, type, arg);
+ break;
+ default:
+ opt_arg--;
+ arg = arg_strtou64(opt_arg);
+
+ btrfs_list_setup_filter_v2(filters, type, arg);
+ break;
+ }
+
+ return 0;
+}
+
/*
* Naming of options:
* - uppercase for filters and sort options
@@ -451,8 +1360,8 @@ static const char * const cmd_subvol_list_usage[] = {
static int cmd_subvol_list(int argc, char **argv)
{
- struct btrfs_list_filter_set *filter_set;
- struct btrfs_list_comparer_set *comparer_set;
+ struct btrfs_list_filter_set_v2 *filter_set;
+ struct btrfs_list_comparer_set_v2 *comparer_set;
u64 flags = 0;
int fd = -1;
u64 top_id;
@@ -463,8 +1372,8 @@ static int cmd_subvol_list(int argc, char **argv)
DIR *dirstream = NULL;
enum btrfs_list_layout layout = BTRFS_LIST_LAYOUT_DEFAULT;
- filter_set = btrfs_list_alloc_filter_set();
- comparer_set = btrfs_list_alloc_comparer_set();
+ filter_set = btrfs_list_alloc_filter_set_v2();
+ comparer_set = btrfs_list_alloc_comparer_set_v2();
while(1) {
int c;
@@ -480,21 +1389,21 @@ static int cmd_subvol_list(int argc, char **argv)
switch(c) {
case 'p':
- btrfs_list_setup_print_column(BTRFS_LIST_PARENT);
+ btrfs_list_setup_print_column_v2(BTRFS_LIST_PARENT);
break;
case 'a':
is_list_all = 1;
break;
case 'c':
- btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
+
btrfs_list_setup_print_column_v2(BTRFS_LIST_OGENERATION);
break;
case 'd':
- btrfs_list_setup_filter(&filter_set,
+ btrfs_list_setup_filter_v2(&filter_set,
BTRFS_LIST_FILTER_DELETED,
0);
break;
case 'g':
- btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
+ btrfs_list_setup_print_column_v2(BTRFS_LIST_GENERATION);
break;
case 'o':
is_only_in_path = 1;
@@ -503,27 +1412,27 @@ static int cmd_subvol_list(int argc, char **argv)
layout = BTRFS_LIST_LAYOUT_TABLE;
break;
case 's':
- btrfs_list_setup_filter(&filter_set,
+ btrfs_list_setup_filter_v2(&filter_set,
BTRFS_LIST_FILTER_SNAPSHOT_ONLY,
0);
- btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
- btrfs_list_setup_print_column(BTRFS_LIST_OTIME);
+
btrfs_list_setup_print_column_v2(BTRFS_LIST_OGENERATION);
+ btrfs_list_setup_print_column_v2(BTRFS_LIST_OTIME);
break;
case 'u':
- btrfs_list_setup_print_column(BTRFS_LIST_UUID);
+ btrfs_list_setup_print_column_v2(BTRFS_LIST_UUID);
break;
case 'q':
- btrfs_list_setup_print_column(BTRFS_LIST_PUUID);
+ btrfs_list_setup_print_column_v2(BTRFS_LIST_PUUID);
break;
case 'R':
- btrfs_list_setup_print_column(BTRFS_LIST_RUUID);
+ btrfs_list_setup_print_column_v2(BTRFS_LIST_RUUID);
break;
case 'r':
flags |= BTRFS_ROOT_SUBVOL_RDONLY;
break;
case 'G':
- btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
- ret = btrfs_list_parse_filter_string(optarg,
+ btrfs_list_setup_print_column_v2(BTRFS_LIST_GENERATION);
+ ret = btrfs_list_parse_filter_string_v2(optarg,
&filter_set,
BTRFS_LIST_FILTER_GEN);
if (ret) {
@@ -533,8 +1442,8 @@ static int cmd_subvol_list(int argc, char **argv)
break;
case 'C':
- btrfs_list_setup_print_column(BTRFS_LIST_OGENERATION);
- ret = btrfs_list_parse_filter_string(optarg,
+
btrfs_list_setup_print_column_v2(BTRFS_LIST_OGENERATION);
+ ret = btrfs_list_parse_filter_string_v2(optarg,
&filter_set,
BTRFS_LIST_FILTER_CGEN);
if (ret) {
@@ -543,7 +1452,7 @@ static int cmd_subvol_list(int argc, char **argv)
}
break;
case 'S':
- ret = btrfs_list_parse_sort_string(optarg,
+ ret = btrfs_list_parse_sort_string_v2(optarg,
&comparer_set);
if (ret) {
uerr = 1;
@@ -571,7 +1480,7 @@ static int cmd_subvol_list(int argc, char **argv)
}
if (flags)
- btrfs_list_setup_filter(&filter_set, BTRFS_LIST_FILTER_FLAGS,
+ btrfs_list_setup_filter_v2(&filter_set, BTRFS_LIST_FILTER_FLAGS,
flags);
ret = btrfs_list_get_path_rootid(fd, &top_id);
@@ -579,21 +1488,21 @@ static int cmd_subvol_list(int argc, char **argv)
goto out;
if (is_list_all)
- btrfs_list_setup_filter(&filter_set,
+ btrfs_list_setup_filter_v2(&filter_set,
BTRFS_LIST_FILTER_FULL_PATH,
top_id);
else if (is_only_in_path)
- btrfs_list_setup_filter(&filter_set,
+ btrfs_list_setup_filter_v2(&filter_set,
BTRFS_LIST_FILTER_TOPID_EQUAL,
top_id);
/* by default we shall print the following columns*/
- btrfs_list_setup_print_column(BTRFS_LIST_OBJECTID);
- btrfs_list_setup_print_column(BTRFS_LIST_GENERATION);
- btrfs_list_setup_print_column(BTRFS_LIST_TOP_LEVEL);
- btrfs_list_setup_print_column(BTRFS_LIST_PATH);
+ btrfs_list_setup_print_column_v2(BTRFS_LIST_OBJECTID);
+ btrfs_list_setup_print_column_v2(BTRFS_LIST_GENERATION);
+ btrfs_list_setup_print_column_v2(BTRFS_LIST_TOP_LEVEL);
+ btrfs_list_setup_print_column_v2(BTRFS_LIST_PATH);
- ret = btrfs_list_subvols_print(fd, filter_set, comparer_set,
+ ret = btrfs_list_subvols_print_v2(fd, filter_set, comparer_set,
layout, !is_list_all && !is_only_in_path, NULL);
out:
--
2.14.4
--
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