Update bcachefs sources to f0ebca18293c bcachefs: bch2_fs_open() now takes a darray

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

20 files changed, 98 insertions, 67 deletions

diff --git a/.bcachefs_revision b/.bcachefs_revision
index a5b138f7..d1c1f3ca 100644
--- a/.bcachefs_revision
+++ b/.bcachefs_revision
@@ -1 +1 @@
-6e73711dc3556f90eefa12d6cc7547d4b0eba5dc
+f0ebca18293c398beddfd80e2ec3575401e7abc4
diff --git a/bch_bindgen/src/fs.rs b/bch_bindgen/src/fs.rs
index 2997ed8f..00c5d965 100644
--- a/bch_bindgen/src/fs.rs
+++ b/bch_bindgen/src/fs.rs
@@ -9,13 +9,25 @@ pub struct Fs {
 }
 
 impl Fs {
-    pub fn open(devs: &[PathBuf], opts: c::bch_opts) -> Result<Fs, bch_errcode> {
-        let devs: Vec<_> = devs
+    pub fn open(devs: &[PathBuf], mut opts: c::bch_opts) -> Result<Fs, bch_errcode> {
+        let devs_cstrs : Vec<_> = devs
             .iter()
-            .map(|i| CString::new(i.as_os_str().as_bytes()).unwrap().into_raw())
+            .map(|i| CString::new(i.as_os_str().as_bytes()).unwrap())
             .collect();
 
-        let ret = unsafe { c::bch2_fs_open(devs[..].as_ptr(), devs.len() as u32, opts) };
+        let mut devs_array: Vec<_> = devs_cstrs
+            .iter()
+            .map(|i| i.as_ptr())
+            .collect();
+
+        let ret = unsafe {
+            let mut devs: c::darray_const_str = std::mem::zeroed();
+
+            devs.data = devs_array[..].as_mut_ptr();
+            devs.nr = devs_array.len();
+
+            c::bch2_fs_open(&mut devs, &mut opts)
+        };
 
         errptr_to_result(ret).map(|fs| Fs { raw: fs })
     }
diff --git a/c_src/cmd_device.c b/c_src/cmd_device.c
index 96c25310..cb40dcea 100644
--- a/c_src/cmd_device.c
+++ b/c_src/cmd_device.c
@@ -515,7 +515,11 @@ static int cmd_device_resize(int argc, char *argv[])
 	} else {
 		printf("Doing offline resize of %s\n", dev);
 
-		struct bch_fs *c = bch2_fs_open(&dev, 1, bch2_opts_empty());
+		darray_const_str devs = {};
+		darray_push(&devs, dev);
+
+		struct bch_opts opts = bch2_opts_empty();
+		struct bch_fs *c = bch2_fs_open(&devs, &opts);
 		if (IS_ERR(c))
 			die("error opening %s: %s", dev, bch2_err_str(PTR_ERR(c)));
 
@@ -612,7 +616,11 @@ static int cmd_device_resize_journal(int argc, char *argv[])
 	} else {
 		printf("%s is offline - starting:\n", dev);
 
-		struct bch_fs *c = bch2_fs_open(&dev, 1, bch2_opts_empty());
+		darray_const_str devs = {};
+		darray_push(&devs, dev);
+
+		struct bch_opts opts = bch2_opts_empty();
+		struct bch_fs *c = bch2_fs_open(&devs, &opts);
 		if (IS_ERR(c))
 			die("error opening %s: %s", dev, bch2_err_str(PTR_ERR(c)));
 
diff --git a/c_src/cmd_dump.c b/c_src/cmd_dump.c
index 7d7ceaa5..c6b813e9 100644
--- a/c_src/cmd_dump.c
+++ b/c_src/cmd_dump.c
@@ -147,7 +147,9 @@ int cmd_dump(int argc, char *argv[])
 	if (!argc)
 		die("Please supply device(s) to check");
 
-	struct bch_fs *c = bch2_fs_open(argv, argc, opts);
+	darray_const_str devs = get_or_split_cmdline_devs(argc, argv);
+
+	struct bch_fs *c = bch2_fs_open(&devs, &opts);
 	if (IS_ERR(c))
 		die("error opening devices: %s", bch2_err_str(PTR_ERR(c)));
 
@@ -177,5 +179,6 @@ int cmd_dump(int argc, char *argv[])
 	up_read(&c->state_lock);
 
 	bch2_fs_stop(c);
+	darray_exit(&devs);
 	return 0;
 }
diff --git a/c_src/cmd_format.c b/c_src/cmd_format.c
index ac48454f..aa87feb0 100644
--- a/c_src/cmd_format.c
+++ b/c_src/cmd_format.c
@@ -123,7 +123,7 @@ static void build_fs(struct bch_fs *c, const char *src_path)
 int cmd_format(int argc, char *argv[])
 {
 	dev_opts_list devices = {};
-	darray_str device_paths = {};
+	darray_const_str device_paths = {};
 	struct format_opts opts	= format_opts_default();
 	struct dev_opts dev_opts = dev_opts_default();
 	bool force = false, no_passphrase = false, quiet = false, initialize = true, verbose = false;
@@ -302,9 +302,8 @@ int cmd_format(int argc, char *argv[])
 		 * Start the filesystem once, to allocate the journal and create
 		 * the root directory:
 		 */
-		struct bch_fs *c = bch2_fs_open(device_paths.data,
-						device_paths.nr,
-						bch2_opts_empty());
+		struct bch_opts open_opts = bch2_opts_empty();
+		struct bch_fs *c = bch2_fs_open(&device_paths, &open_opts);
 		if (IS_ERR(c))
 			die("error opening %s: %s", device_paths.data[0],
 			    bch2_err_str(PTR_ERR(c)));
diff --git a/c_src/cmd_fsck.c b/c_src/cmd_fsck.c
index aa81fa11..e18f89c5 100644
--- a/c_src/cmd_fsck.c
+++ b/c_src/cmd_fsck.c
@@ -113,7 +113,7 @@ static void append_opt(struct printbuf *out, const char *opt)
 	prt_str(out, opt);
 }
 
-static bool should_use_kernel_fsck(darray_str devs)
+static bool should_use_kernel_fsck(darray_const_str devs)
 {
 	system("modprobe bcachefs");
 
@@ -131,7 +131,7 @@ static bool should_use_kernel_fsck(darray_str devs)
 	opt_set(opts, nochanges, true);
 	opt_set(opts, read_only, true);
 
-	struct bch_fs *c = bch2_fs_open(devs.data, devs.nr, opts);
+	struct bch_fs *c = bch2_fs_open(&devs, &opts);
 	if (IS_ERR(c))
 		return false;
 
@@ -265,7 +265,7 @@ int cmd_fsck(int argc, char *argv[])
 		exit(8);
 	}
 
-	darray_str devs = get_or_split_cmdline_devs(argc, argv);
+	darray_const_str devs = get_or_split_cmdline_devs(argc, argv);
 
 	darray_for_each(devs, i)
 		if (dev_mounted(*i)) {
@@ -324,7 +324,7 @@ userland_fsck:
 		if (ret)
 			return ret;
 
-		struct bch_fs *c = bch2_fs_open(devs.data, devs.nr, opts);
+		struct bch_fs *c = bch2_fs_open(&devs, &opts);
 		if (IS_ERR(c))
 			exit(8);
 
diff --git a/c_src/cmd_key.c b/c_src/cmd_key.c
index ac8a94a8..c1b72ff4 100644
--- a/c_src/cmd_key.c
+++ b/c_src/cmd_key.c
@@ -87,12 +87,13 @@ int cmd_unlock(int argc, char *argv[])
 
 int cmd_set_passphrase(int argc, char *argv[])
 {
-	struct bch_opts opts = bch2_opts_empty();
-	struct bch_fs *c;
-
-	if (argc < 2)
+	args_shift(1);
+	if (!argc)
 		die("Please supply one or more devices");
 
+	darray_const_str devs = get_or_split_cmdline_devs(argc, argv);
+
+	struct bch_opts opts = bch2_opts_empty();
 	opt_set(opts, nostart, true);
 
 	/*
@@ -100,7 +101,7 @@ int cmd_set_passphrase(int argc, char *argv[])
 	 * to make sure we're opening and updating every component device:
 	 */
 
-	c = bch2_fs_open(argv + 1, argc - 1, opts);
+	struct bch_fs *c = bch2_fs_open(&devs, &opts);
 	if (IS_ERR(c))
 		die("Error opening %s: %s", argv[1], bch2_err_str(PTR_ERR(c)));
 
@@ -126,14 +127,16 @@ int cmd_set_passphrase(int argc, char *argv[])
 
 int cmd_remove_passphrase(int argc, char *argv[])
 {
-	struct bch_opts opts = bch2_opts_empty();
-	struct bch_fs *c;
-
-	if (argc < 2)
+	args_shift(1);
+	if (!argc)
 		die("Please supply one or more devices");
 
+	darray_const_str devs = get_or_split_cmdline_devs(argc, argv);
+
+	struct bch_opts opts = bch2_opts_empty();
 	opt_set(opts, nostart, true);
-	c = bch2_fs_open(argv + 1, argc - 1, opts);
+
+	struct bch_fs *c = bch2_fs_open(&devs, &opts);
 	if (IS_ERR(c))
 		die("Error opening %s: %s", argv[1], bch2_err_str(PTR_ERR(c)));
 
diff --git a/c_src/cmd_kill_btree_node.c b/c_src/cmd_kill_btree_node.c
index c8f43150..81dbdd4b 100644
--- a/c_src/cmd_kill_btree_node.c
+++ b/c_src/cmd_kill_btree_node.c
@@ -74,7 +74,9 @@ int cmd_kill_btree_node(int argc, char *argv[])
 	if (!argc)
 		die("Please supply device(s)");
 
-	struct bch_fs *c = bch2_fs_open(argv, argc, opts);
+	darray_const_str devs = get_or_split_cmdline_devs(argc, argv);
+
+	struct bch_fs *c = bch2_fs_open(&devs, &opts);
 	if (IS_ERR(c))
 		die("error opening %s: %s", argv[0], bch2_err_str(PTR_ERR(c)));
 
diff --git a/c_src/cmd_list_journal.c b/c_src/cmd_list_journal.c
index 3cdf4846..fe9e3bbd 100644
--- a/c_src/cmd_list_journal.c
+++ b/c_src/cmd_list_journal.c
@@ -319,9 +319,9 @@ int cmd_list_journal(int argc, char *argv[])
 	if (!argc)
 		die("Please supply device(s) to open");
 
-	darray_str devs = get_or_split_cmdline_devs(argc, argv);
+	darray_const_str devs = get_or_split_cmdline_devs(argc, argv);
 
-	struct bch_fs *c = bch2_fs_open(devs.data, devs.nr, opts);
+	struct bch_fs *c = bch2_fs_open(&devs, &opts);
 	if (IS_ERR(c))
 		die("error opening %s: %s", argv[0], bch2_err_str(PTR_ERR(c)));
 
diff --git a/c_src/cmd_migrate.c b/c_src/cmd_migrate.c
index edd77377..91c42302 100644
--- a/c_src/cmd_migrate.c
+++ b/c_src/cmd_migrate.c
@@ -253,14 +253,15 @@ static int migrate_fs(const char		*fs_path,
 
 	free(sb);
 
-	char *path[1] = { dev->path };
+	darray_const_str dev_paths = {};
+	darray_push(&dev_paths, dev->path);
 
 	struct bch_opts opts = bch2_opts_empty();
 	opt_set(opts, sb,	sb_offset);
 	opt_set(opts, nostart,	true);
 	opt_set(opts, noexcl,	true);
 
-	struct bch_fs *c = bch2_fs_open(path, 1, opts);
+	struct bch_fs *c = bch2_fs_open(&dev_paths, &opts);
 	if (IS_ERR(c))
 		die("Error opening new filesystem: %s", bch2_err_str(PTR_ERR(c)));
 
@@ -295,7 +296,7 @@ static int migrate_fs(const char		*fs_path,
 	opt_set(opts, nochanges, true);
 	opt_set(opts, read_only, true);
 
-	c = bch2_fs_open(path, 1, opts);
+	c = bch2_fs_open(&dev_paths, &opts);
 	if (IS_ERR(c))
 		die("Error opening new filesystem: %s", bch2_err_str(PTR_ERR(c)));
 
@@ -377,14 +378,14 @@ static void migrate_superblock_usage(void)
 
 int cmd_migrate_superblock(int argc, char *argv[])
 {
-	char *dev = NULL;
+	darray_const_str devs = {};
 	u64 sb_offset = 0;
 	int opt, ret;
 
 	while ((opt = getopt(argc, argv, "d:o:h")) != -1)
 		switch (opt) {
 			case 'd':
-				dev = optarg;
+				darray_push(&devs, optarg);
 				break;
 			case 'o':
 				ret = kstrtou64(optarg, 10, &sb_offset);
@@ -396,13 +397,13 @@ int cmd_migrate_superblock(int argc, char *argv[])
 				exit(EXIT_SUCCESS);
 		}
 
-	if (!dev)
+	if (!devs.nr)
 		die("Please specify a device");
 
 	if (!sb_offset)
 		die("Please specify offset of existing superblock");
 
-	int fd = xopen(dev, O_RDWR);
+	int fd = xopen(devs.data[0], O_RDWR);
 	struct bch_sb *sb = __bch2_super_read(fd, sb_offset);
 	unsigned sb_size = 1U << sb->layout.sb_max_size_bits;
 
@@ -435,7 +436,7 @@ int cmd_migrate_superblock(int argc, char *argv[])
 	opt_set(opts, nostart,	true);
 	opt_set(opts, sb,	sb_offset);
 
-	struct bch_fs *c = bch2_fs_open(&dev, 1, opts);
+	struct bch_fs *c = bch2_fs_open(&devs, &opts);
 	ret =   PTR_ERR_OR_ZERO(c) ?:
 		bch2_buckets_nouse_alloc(c);
 	if (ret)
@@ -461,7 +462,7 @@ int cmd_migrate_superblock(int argc, char *argv[])
 	 * inconsequential:
 	 */
 
-	c = bch2_fs_open(&dev, 1, opts);
+	c = bch2_fs_open(&devs, &opts);
 	ret =   PTR_ERR_OR_ZERO(c);
 	if (ret)
 		die("error opening filesystem: %s", bch2_err_str(ret));
diff --git a/c_src/cmd_option.c b/c_src/cmd_option.c
index e314903a..14201c8d 100644
--- a/c_src/cmd_option.c
+++ b/c_src/cmd_option.c
@@ -94,10 +94,12 @@ int cmd_set_option(int argc, char *argv[])
 		}
 
 	if (!online) {
+		darray_const_str devs = get_or_split_cmdline_devs(argc, argv);
+
 		struct bch_opts open_opts = bch2_opts_empty();
 		opt_set(open_opts, nostart, true);
 
-		struct bch_fs *c = bch2_fs_open(argv, argc, open_opts);
+		struct bch_fs *c = bch2_fs_open(&devs, &open_opts);
 		if (IS_ERR(c)) {
 			fprintf(stderr, "error opening %s: %s\n", argv[0], bch2_err_str(PTR_ERR(c)));
 			exit(EXIT_FAILURE);
diff --git a/c_src/tools-util.c b/c_src/tools-util.c
index ea12946c..03ad009f 100644
--- a/c_src/tools-util.c
+++ b/c_src/tools-util.c
@@ -547,7 +547,7 @@ char *dev_to_path(dev_t dev)
 	return path;
 }
 
-struct mntent *dev_to_mount(char *dev)
+struct mntent *dev_to_mount(const char *dev)
 {
 	struct mntent *mnt, *ret = NULL;
 	FILE *f = setmntent("/proc/mounts", "r");
@@ -586,7 +586,7 @@ found:
 	return ret;
 }
 
-int dev_mounted(char *dev)
+int dev_mounted(const char *dev)
 {
 	struct mntent *mnt = dev_to_mount(dev);
 
@@ -748,9 +748,9 @@ unsigned version_parse(char *buf)
 	return BCH_VERSION(major, minor);
 }
 
-darray_str get_or_split_cmdline_devs(int argc, char *argv[])
+darray_const_str get_or_split_cmdline_devs(int argc, char *argv[])
 {
-	darray_str ret = {};
+	darray_const_str ret = {};
 
 	if (argc == 1) {
 		bch2_split_devs(argv[0], &ret);
diff --git a/c_src/tools-util.h b/c_src/tools-util.h
index 27652b62..1352050e 100644
--- a/c_src/tools-util.h
+++ b/c_src/tools-util.h
@@ -186,8 +186,8 @@ u32 crc32c(u32, const void *, size_t);
 
 char *dev_to_name(dev_t);
 char *dev_to_path(dev_t);
-struct mntent *dev_to_mount(char *);
-int dev_mounted(char *);
+struct mntent *dev_to_mount(const char *);
+int dev_mounted(const char *);
 char *fd_to_dev_model(int);
 
 #define args_shift(_nr)							\
@@ -217,7 +217,7 @@ struct bbpos_range bbpos_range_parse(char *);
 
 unsigned version_parse(char *);
 
-darray_str get_or_split_cmdline_devs(int argc, char *argv[]);
+darray_const_str get_or_split_cmdline_devs(int argc, char *argv[]);
 
 char *pop_cmd(int *argc, char *argv[]);
 
diff --git a/libbcachefs/darray.h b/libbcachefs/darray.h
index 88f0ca3f..50ec3dec 100644
--- a/libbcachefs/darray.h
+++ b/libbcachefs/darray.h
@@ -21,6 +21,7 @@ struct {								\
 
 typedef DARRAY(char)	darray_char;
 typedef DARRAY(char *)	darray_str;
+typedef DARRAY(const char *) darray_const_str;
 
 typedef DARRAY(u8)	darray_u8;
 typedef DARRAY(u16)	darray_u16;
diff --git a/libbcachefs/fs.c b/libbcachefs/fs.c
index dea63ede..f1472e91 100644
--- a/libbcachefs/fs.c
+++ b/libbcachefs/fs.c
@@ -2463,7 +2463,7 @@ static int bch2_fs_get_tree(struct fs_context *fc)
 	struct inode *vinode;
 	struct bch2_opts_parse *opts_parse = fc->fs_private;
 	struct bch_opts opts = opts_parse->opts;
-	darray_str devs;
+	darray_const_str devs;
 	darray_fs devs_to_fs = {};
 	int ret;
 
@@ -2487,7 +2487,7 @@ static int bch2_fs_get_tree(struct fs_context *fc)
 	if (!IS_ERR(sb))
 		goto got_sb;
 
-	c = bch2_fs_open(devs.data, devs.nr, opts);
+	c = bch2_fs_open(&devs, &opts);
 	ret = PTR_ERR_OR_ZERO(c);
 	if (ret)
 		goto err;
diff --git a/libbcachefs/fsck.c b/libbcachefs/fsck.c
index 540db66e..7d3dd1a0 100644
--- a/libbcachefs/fsck.c
+++ b/libbcachefs/fsck.c
@@ -3022,7 +3022,7 @@ long bch2_ioctl_fsck_offline(struct bch_ioctl_fsck_offline __user *user_arg)
 {
 	struct bch_ioctl_fsck_offline arg;
 	struct fsck_thread *thr = NULL;
-	darray_str(devs) = {};
+	darray_const_str devs = {};
 	long ret = 0;
 
 	if (copy_from_user(&arg, user_arg, sizeof(arg)))
@@ -3080,7 +3080,7 @@ long bch2_ioctl_fsck_offline(struct bch_ioctl_fsck_offline __user *user_arg)
 
 	bch2_thread_with_stdio_init(&thr->thr, &bch2_offline_fsck_ops);
 
-	thr->c = bch2_fs_open(devs.data, arg.nr_devs, thr->opts);
+	thr->c = bch2_fs_open(&devs, &thr->opts);
 
 	if (!IS_ERR(thr->c) &&
 	    thr->c->opts.errors == BCH_ON_ERROR_panic)
diff --git a/libbcachefs/super.c b/libbcachefs/super.c
index 81a7e703..7102a2bf 100644
--- a/libbcachefs/super.c
+++ b/libbcachefs/super.c
@@ -803,7 +803,7 @@ static int bch2_fs_init_rw(struct bch_fs *c)
 	return 0;
 }
 
-static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts,
+static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts *opts,
 				    bch_sb_handles *sbs)
 {
 	struct bch_fs *c;
@@ -817,7 +817,7 @@ static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts,
 		goto out;
 	}
 
-	c->stdio = (void *)(unsigned long) opts.stdio;
+	c->stdio = (void *)(unsigned long) opts->stdio;
 
 	__module_get(THIS_MODULE);
 
@@ -917,7 +917,7 @@ static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts,
 	if (ret)
 		goto err;
 
-	bch2_opts_apply(&c->opts, opts);
+	bch2_opts_apply(&c->opts, *opts);
 
 	c->btree_key_cache_btrees |= 1U << BTREE_ID_alloc;
 	if (c->opts.inodes_use_key_cache)
@@ -2273,8 +2273,8 @@ static inline int sb_cmp(struct bch_sb *l, struct bch_sb *r)
 		cmp_int(le64_to_cpu(l->write_time), le64_to_cpu(r->write_time));
 }
 
-struct bch_fs *bch2_fs_open(char * const *devices, unsigned nr_devices,
-			    struct bch_opts opts)
+struct bch_fs *bch2_fs_open(darray_const_str *devices,
+			    struct bch_opts *opts)
 {
 	bch_sb_handles sbs = {};
 	struct bch_fs *c = NULL;
@@ -2285,26 +2285,26 @@ struct bch_fs *bch2_fs_open(char * const *devices, unsigned nr_devices,
 	if (!try_module_get(THIS_MODULE))
 		return ERR_PTR(-ENODEV);
 
-	if (!nr_devices) {
+	if (!devices->nr) {
 		ret = -EINVAL;
 		goto err;
 	}
 
-	ret = darray_make_room(&sbs, nr_devices);
+	ret = darray_make_room(&sbs, devices->nr);
 	if (ret)
 		goto err;
 
-	for (unsigned i = 0; i < nr_devices; i++) {
+	darray_for_each(*devices, i) {
 		struct bch_sb_handle sb = { NULL };
 
-		ret = bch2_read_super(devices[i], &opts, &sb);
+		ret = bch2_read_super(*i, opts, &sb);
 		if (ret)
 			goto err;
 
 		BUG_ON(darray_push(&sbs, sb));
 	}
 
-	if (opts.nochanges && !opts.read_only) {
+	if (opts->nochanges && !opts->read_only) {
 		ret = -BCH_ERR_erofs_nochanges;
 		goto err_print;
 	}
@@ -2314,7 +2314,7 @@ struct bch_fs *bch2_fs_open(char * const *devices, unsigned nr_devices,
 			best = sb;
 
 	darray_for_each_reverse(sbs, sb) {
-		ret = bch2_dev_in_fs(best, sb, &opts);
+		ret = bch2_dev_in_fs(best, sb, opts);
 
 		if (ret == -BCH_ERR_device_has_been_removed ||
 		    ret == -BCH_ERR_device_splitbrain) {
@@ -2358,7 +2358,7 @@ out:
 	return c;
 err_print:
 	pr_err("bch_fs_open err opening %s: %s",
-	       devices[0], bch2_err_str(ret));
+	       devices->data[0], bch2_err_str(ret));
 err:
 	if (!IS_ERR_OR_NULL(c))
 		bch2_fs_stop(c);
diff --git a/libbcachefs/super.h b/libbcachefs/super.h
index a0bbb9f4..7252544c 100644
--- a/libbcachefs/super.h
+++ b/libbcachefs/super.h
@@ -43,7 +43,7 @@ void bch2_fs_free(struct bch_fs *);
 void bch2_fs_stop(struct bch_fs *);
 
 int bch2_fs_start(struct bch_fs *);
-struct bch_fs *bch2_fs_open(char * const *, unsigned, struct bch_opts);
+struct bch_fs *bch2_fs_open(darray_const_str *, struct bch_opts *);
 
 extern const struct blk_holder_ops bch2_sb_handle_bdev_ops;
 
diff --git a/libbcachefs/util.c b/libbcachefs/util.c
index 1cff407c..dc3817f5 100644
--- a/libbcachefs/util.c
+++ b/libbcachefs/util.c
@@ -1016,14 +1016,14 @@ u64 *bch2_acc_percpu_u64s(u64 __percpu *p, unsigned nr)
 	return ret;
 }
 
-void bch2_darray_str_exit(darray_str *d)
+void bch2_darray_str_exit(darray_const_str *d)
 {
 	darray_for_each(*d, i)
 		kfree(*i);
 	darray_exit(d);
 }
 
-int bch2_split_devs(const char *_dev_name, darray_str *ret)
+int bch2_split_devs(const char *_dev_name, darray_const_str *ret)
 {
 	darray_init(ret);
 
diff --git a/libbcachefs/util.h b/libbcachefs/util.h
index 7a93e187..14cb2c7d 100644
--- a/libbcachefs/util.h
+++ b/libbcachefs/util.h
@@ -690,8 +690,8 @@ static inline bool qstr_eq(const struct qstr l, const struct qstr r)
 	return l.len == r.len && !memcmp(l.name, r.name, l.len);
 }
 
-void bch2_darray_str_exit(darray_str *);
-int bch2_split_devs(const char *, darray_str *);
+void bch2_darray_str_exit(darray_const_str *);
+int bch2_split_devs(const char *, darray_const_str *);
 
 #ifdef __KERNEL__