move Rust sources to top level, C sources into c_src

This moves the Rust sources out of rust_src/ and into the top level.
Running the bcachefs executable out of the development tree is now:

$ ./target/release/bcachefs command
or
$ cargo run --profile release -- command

instead of "./bcachefs command".

Building and installing is still:

$ make && make install

Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 348 insertions, 0 deletions

diff --git a/c_src/cmd_fs.c b/c_src/cmd_fs.c
new file mode 100644
index 00000000..67c38af6
--- /dev/null
+++ b/c_src/cmd_fs.c
@@ -0,0 +1,348 @@
+#include <getopt.h>
+#include <stdio.h>
+#include <sys/ioctl.h>
+
+#include <uuid/uuid.h>
+
+#include "linux/sort.h"
+
+#include "libbcachefs/bcachefs_ioctl.h"
+#include "libbcachefs/darray.h"
+#include "libbcachefs/opts.h"
+#include "libbcachefs/super-io.h"
+
+#include "cmds.h"
+#include "libbcachefs.h"
+
+static void __dev_usage_type_to_text(struct printbuf *out,
+				     const char *type,
+				     unsigned bucket_size,
+				     u64 buckets, u64 sectors, u64 frag)
+{
+	prt_printf(out, "%s:", type);
+	prt_tab(out);
+
+	prt_units_u64(out, sectors << 9);
+	prt_tab_rjust(out);
+
+	prt_printf(out, "%llu", buckets);
+	prt_tab_rjust(out);
+
+	if (frag) {
+		prt_units_u64(out, frag << 9);
+		prt_tab_rjust(out);
+	}
+	prt_newline(out);
+}
+
+static void dev_usage_type_to_text(struct printbuf *out,
+				   struct bch_ioctl_dev_usage_v2 *u,
+				   enum bch_data_type type)
+{
+	u64 sectors = 0;
+	switch (type) {
+	case BCH_DATA_free:
+	case BCH_DATA_need_discard:
+	case BCH_DATA_need_gc_gens:
+		/* sectors are 0 for these types so calculate sectors for them */
+		sectors = u->d[type].buckets * u->bucket_size;
+		break;
+	default:
+		sectors = u->d[type].sectors;
+	}
+
+	__dev_usage_type_to_text(out, bch2_data_types[type],
+			u->bucket_size,
+			u->d[type].buckets,
+			sectors,
+			u->d[type].fragmented);
+}
+
+static void dev_usage_to_text(struct printbuf *out,
+			      struct bchfs_handle fs,
+			      struct dev_name *d)
+{
+	struct bch_ioctl_dev_usage_v2 *u = bchu_dev_usage(fs, d->idx);
+
+	prt_newline(out);
+	prt_printf(out, "%s (device %u):", d->label ?: "(no label)", d->idx);
+	prt_tab(out);
+	prt_str(out, d->dev ?: "(device not found)");
+	prt_tab_rjust(out);
+
+	prt_str(out, bch2_member_states[u->state]);
+	prt_tab_rjust(out);
+
+	prt_newline(out);
+
+	printbuf_indent_add(out, 2);
+	prt_tab(out);
+
+	prt_str(out, "data");
+	prt_tab_rjust(out);
+
+	prt_str(out, "buckets");
+	prt_tab_rjust(out);
+
+	prt_str(out, "fragmented");
+	prt_tab_rjust(out);
+
+	prt_newline(out);
+
+	for (unsigned i = 0; i < u->nr_data_types; i++)
+		dev_usage_type_to_text(out, u, i);
+
+	prt_str(out, "capacity:");
+	prt_tab(out);
+
+	prt_units_u64(out, (u->nr_buckets * u->bucket_size) << 9);
+	prt_tab_rjust(out);
+	prt_printf(out, "%llu", u->nr_buckets);
+	prt_tab_rjust(out);
+
+	printbuf_indent_sub(out, 2);
+
+	prt_newline(out);
+	free(u);
+}
+
+static int dev_by_label_cmp(const void *_l, const void *_r)
+{
+	const struct dev_name *l = _l, *r = _r;
+
+	return  (l->label && r->label
+		 ? strcmp(l->label, r->label) : 0) ?:
+		(l->dev && r->dev
+		 ? strcmp(l->dev, r->dev) : 0) ?:
+		cmp_int(l->idx, r->idx);
+}
+
+static struct dev_name *dev_idx_to_name(dev_names *dev_names, unsigned idx)
+{
+	darray_for_each(*dev_names, dev)
+		if (dev->idx == idx)
+			return dev;
+	return NULL;
+}
+
+static void replicas_usage_to_text(struct printbuf *out,
+				   const struct bch_replicas_usage *r,
+				   dev_names *dev_names)
+{
+	if (!r->sectors)
+		return;
+
+	char devs[4096], *d = devs;
+	*d++ = '[';
+
+	unsigned durability = 0;
+
+	for (unsigned i = 0; i < r->r.nr_devs; i++) {
+		unsigned dev_idx = r->r.devs[i];
+		struct dev_name *dev = dev_idx_to_name(dev_names, dev_idx);
+
+		durability += dev->durability;
+
+		if (i)
+			*d++ = ' ';
+
+		d += dev && dev->dev
+			? sprintf(d, "%s", dev->dev)
+			: sprintf(d, "%u", dev_idx);
+	}
+	*d++ = ']';
+	*d++ = '\0';
+
+	prt_printf(out, "%s: ", bch2_data_types[r->r.data_type]);
+	prt_tab(out);
+
+	prt_printf(out, "%u/%u ", r->r.nr_required, r->r.nr_devs);
+	prt_tab(out);
+
+	prt_printf(out, "%u ", durability);
+	prt_tab(out);
+
+	prt_printf(out, "%s ", devs);
+	prt_tab(out);
+
+	prt_units_u64(out, r->sectors << 9);
+	prt_tab_rjust(out);
+	prt_newline(out);
+}
+
+#define for_each_usage_replica(_u, _r)					\
+	for (_r = (_u)->replicas;					\
+	     _r != (void *) (_u)->replicas + (_u)->replica_entries_bytes;\
+	     _r = replicas_usage_next(_r),				\
+	     BUG_ON((void *) _r > (void *) (_u)->replicas + (_u)->replica_entries_bytes))
+
+static void fs_usage_to_text(struct printbuf *out, const char *path)
+{
+	unsigned i;
+
+	struct bchfs_handle fs = bcache_fs_open(path);
+
+	dev_names dev_names = bchu_fs_get_devices(fs);
+
+	struct bch_ioctl_fs_usage *u = bchu_fs_usage(fs);
+
+	prt_str(out, "Filesystem: ");
+	pr_uuid(out, fs.uuid.b);
+	prt_newline(out);
+
+	printbuf_tabstops_reset(out);
+	printbuf_tabstop_push(out, 20);
+	printbuf_tabstop_push(out, 16);
+
+	prt_str(out, "Size:");
+	prt_tab(out);
+	prt_units_u64(out, u->capacity << 9);
+	prt_tab_rjust(out);
+	prt_newline(out);
+
+	prt_str(out, "Used:");
+	prt_tab(out);
+	prt_units_u64(out, u->used << 9);
+	prt_tab_rjust(out);
+	prt_newline(out);
+
+	prt_str(out, "Online reserved:");
+	prt_tab(out);
+	prt_units_u64(out, u->online_reserved << 9);
+	prt_tab_rjust(out);
+	prt_newline(out);
+
+	prt_newline(out);
+
+	printbuf_tabstops_reset(out);
+
+	printbuf_tabstop_push(out, 16);
+	prt_str(out, "Data type");
+	prt_tab(out);
+
+	printbuf_tabstop_push(out, 16);
+	prt_str(out, "Required/total");
+	prt_tab(out);
+
+	printbuf_tabstop_push(out, 14);
+	prt_str(out, "Durability");
+	prt_tab(out);
+
+	printbuf_tabstop_push(out, 14);
+	prt_str(out, "Devices");
+	prt_newline(out);
+
+	printbuf_tabstop_push(out, 14);
+
+	for (i = 0; i < BCH_REPLICAS_MAX; i++) {
+		if (!u->persistent_reserved[i])
+			continue;
+
+		prt_str(out, "reserved:");
+		prt_tab(out);
+		prt_printf(out, "%u/%u ", 1, i);
+		prt_tab(out);
+		prt_str(out, "[] ");
+		prt_units_u64(out, u->persistent_reserved[i] << 9);
+		prt_tab_rjust(out);
+		prt_newline(out);
+	}
+
+	struct bch_replicas_usage *r;
+
+	for_each_usage_replica(u, r)
+		if (r->r.data_type < BCH_DATA_user)
+			replicas_usage_to_text(out, r, &dev_names);
+
+	for_each_usage_replica(u, r)
+		if (r->r.data_type == BCH_DATA_user &&
+		    r->r.nr_required <= 1)
+			replicas_usage_to_text(out, r, &dev_names);
+
+	for_each_usage_replica(u, r)
+		if (r->r.data_type == BCH_DATA_user &&
+		    r->r.nr_required > 1)
+			replicas_usage_to_text(out, r, &dev_names);
+
+	for_each_usage_replica(u, r)
+		if (r->r.data_type > BCH_DATA_user)
+			replicas_usage_to_text(out, r, &dev_names);
+
+	free(u);
+
+	sort(dev_names.data, dev_names.nr,
+	     sizeof(dev_names.data[0]), dev_by_label_cmp, NULL);
+
+	printbuf_tabstops_reset(out);
+	printbuf_tabstop_push(out, 16);
+	printbuf_tabstop_push(out, 20);
+	printbuf_tabstop_push(out, 16);
+	printbuf_tabstop_push(out, 14);
+
+	darray_for_each(dev_names, dev)
+		dev_usage_to_text(out, fs, dev);
+
+	darray_for_each(dev_names, dev) {
+		free(dev->dev);
+		free(dev->label);
+	}
+	darray_exit(&dev_names);
+
+	bcache_fs_close(fs);
+}
+
+static void fs_usage_usage(void)
+{
+	puts("bcachefs fs usage - display detailed filesystem usage\n"
+	     "Usage: bcachefs fs usage [OPTION]... <mountpoint>\n"
+	     "\n"
+	     "Options:\n"
+	     "  -h, --human-readable              Human readable units\n"
+	     "  -H, --help                        Display this help and exit\n"
+	     "Report bugs to <linux-bcachefs@vger.kernel.org>");
+}
+
+int cmd_fs_usage(int argc, char *argv[])
+{
+	static const struct option longopts[] = {
+		{ "help",		no_argument,		NULL, 'H' },
+		{ "human-readable",     no_argument,            NULL, 'h' },
+		{ NULL }
+	};
+	bool human_readable = false;
+	struct printbuf buf = PRINTBUF;
+	char *fs;
+	int opt;
+
+	while ((opt = getopt_long(argc, argv, "h",
+				  longopts, NULL)) != -1)
+		switch (opt) {
+		case 'h':
+			human_readable = true;
+			break;
+		case 'H':
+			fs_usage_usage();
+			exit(EXIT_SUCCESS);
+		default:
+			fs_usage_usage();
+			exit(EXIT_FAILURE);
+		}
+	args_shift(optind);
+
+	if (!argc) {
+		printbuf_reset(&buf);
+		buf.human_readable_units = human_readable;
+		fs_usage_to_text(&buf, ".");
+		printf("%s", buf.buf);
+	} else {
+		while ((fs = arg_pop())) {
+			printbuf_reset(&buf);
+			buf.human_readable_units = human_readable;
+			fs_usage_to_text(&buf, fs);
+			printf("%s", buf.buf);
+		}
+	}
+
+	printbuf_exit(&buf);
+	return 0;
+}