--- /dev/null
+#ifndef _LIBBCACHE_H
+#define _LIBBCACHE_H
+
+#include <linux/uuid.h>
+#include <stdbool.h>
+
+#include "libbcachefs/bcachefs_format.h"
+#include "libbcachefs/bcachefs_ioctl.h"
+#include "libbcachefs/opts.h"
+#include "libbcachefs/vstructs.h"
+#include "tools-util.h"
+
+/* option parsing */
+
+#define SUPERBLOCK_SIZE_DEFAULT 2048 /* 1 MB */
+
+struct bch_opt_strs {
+union {
+ char *by_id[bch2_opts_nr];
+struct {
+#define x(_name, ...) char *_name;
+ BCH_OPTS()
+#undef x
+};
+};
+};
+
+void bch2_opt_strs_free(struct bch_opt_strs *);
+struct bch_opt_strs bch2_cmdline_opts_get(int *, char *[], unsigned);
+struct bch_opts bch2_parse_opts(struct bch_opt_strs);
+void bch2_opts_usage(unsigned);
+
+struct format_opts {
+ char *label;
+ __uuid_t uuid;
+ unsigned version;
+ unsigned superblock_size;
+ bool encrypted;
+ char *passphrase;
+};
+
+static inline struct format_opts format_opts_default()
+{
+ unsigned version = !access( "/sys/module/bcachefs/parameters/version", R_OK)
+ ? read_file_u64(AT_FDCWD, "/sys/module/bcachefs/parameters/version")
+ : bcachefs_metadata_version_current;
+
+ return (struct format_opts) {
+ .version = version,
+ .superblock_size = SUPERBLOCK_SIZE_DEFAULT,
+ };
+}
+
+struct dev_opts {
+ struct block_device *bdev;
+ char *path;
+ u64 size; /* bytes*/
+ u64 bucket_size; /* bytes */
+ const char *label;
+ unsigned data_allowed;
+ unsigned durability;
+ bool discard;
+
+ u64 nbuckets;
+
+ u64 sb_offset;
+ u64 sb_end;
+};
+
+static inline struct dev_opts dev_opts_default()
+{
+ return (struct dev_opts) {
+ .data_allowed = ~0U << 2,
+ .durability = 1,
+ };
+}
+
+u64 bch2_pick_bucket_size(struct bch_opts, struct dev_opts *);
+void bch2_check_bucket_size(struct bch_opts, struct dev_opts *);
+
+struct bch_sb *bch2_format(struct bch_opt_strs,
+ struct bch_opts,
+ struct format_opts, struct dev_opts *, size_t);
+
+void bch2_super_write(int, struct bch_sb *);
+struct bch_sb *__bch2_super_read(int, u64);
+
+/* ioctl interface: */
+
+int bcachectl_open(void);
+
+struct bchfs_handle {
+ __uuid_t uuid;
+ int ioctl_fd;
+ int sysfs_fd;
+};
+
+void bcache_fs_close(struct bchfs_handle);
+struct bchfs_handle bcache_fs_open(const char *);
+struct bchfs_handle bchu_fs_open_by_dev(const char *, int *);
+int bchu_dev_path_to_idx(struct bchfs_handle, const char *);
+
+static inline void bchu_disk_add(struct bchfs_handle fs, char *dev)
+{
+ struct bch_ioctl_disk i = { .dev = (unsigned long) dev, };
+
+ xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_ADD, &i);
+}
+
+static inline void bchu_disk_remove(struct bchfs_handle fs, unsigned dev_idx,
+ unsigned flags)
+{
+ struct bch_ioctl_disk i = {
+ .flags = flags|BCH_BY_INDEX,
+ .dev = dev_idx,
+ };
+
+ xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_REMOVE, &i);
+}
+
+static inline void bchu_disk_online(struct bchfs_handle fs, char *dev)
+{
+ struct bch_ioctl_disk i = { .dev = (unsigned long) dev, };
+
+ xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_ONLINE, &i);
+}
+
+static inline void bchu_disk_offline(struct bchfs_handle fs, unsigned dev_idx,
+ unsigned flags)
+{
+ struct bch_ioctl_disk i = {
+ .flags = flags|BCH_BY_INDEX,
+ .dev = dev_idx,
+ };
+
+ xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_OFFLINE, &i);
+}
+
+static inline void bchu_disk_set_state(struct bchfs_handle fs, unsigned dev,
+ unsigned new_state, unsigned flags)
+{
+ struct bch_ioctl_disk_set_state i = {
+ .flags = flags|BCH_BY_INDEX,
+ .new_state = new_state,
+ .dev = dev,
+ };
+
+ xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_SET_STATE, &i);
+}
+
+static inline struct bch_ioctl_fs_usage *bchu_fs_usage(struct bchfs_handle fs)
+{
+ struct bch_ioctl_fs_usage *u = NULL;
+ size_t replica_entries_bytes = 4096;
+
+ while (1) {
+ u = xrealloc(u, sizeof(*u) + replica_entries_bytes);
+ u->replica_entries_bytes = replica_entries_bytes;
+
+ if (!ioctl(fs.ioctl_fd, BCH_IOCTL_FS_USAGE, u))
+ return u;
+
+ if (errno != ERANGE)
+ die("BCH_IOCTL_USAGE error: %m");
+
+ replica_entries_bytes *= 2;
+ }
+}
+
+static inline struct bch_ioctl_dev_usage_v2 *bchu_dev_usage(struct bchfs_handle fs,
+ unsigned idx)
+{
+ struct bch_ioctl_dev_usage_v2 *u = xcalloc(sizeof(*u) + sizeof(u->d[0]) * BCH_DATA_NR, 1);
+
+ u->dev = idx;
+ u->flags = BCH_BY_INDEX;
+ u->nr_data_types = BCH_DATA_NR;
+
+ if (!ioctl(fs.ioctl_fd, BCH_IOCTL_DEV_USAGE_V2, u))
+ return u;
+
+ struct bch_ioctl_dev_usage u_v1 = { .dev = idx, .flags = BCH_BY_INDEX};
+ xioctl(fs.ioctl_fd, BCH_IOCTL_DEV_USAGE, &u_v1);
+
+ u->state = u_v1.state;
+ u->nr_data_types = ARRAY_SIZE(u_v1.d);
+ u->bucket_size = u_v1.bucket_size;
+ u->nr_buckets = u_v1.nr_buckets;
+
+ for (unsigned i = 0; i < ARRAY_SIZE(u_v1.d); i++)
+ u->d[i] = u_v1.d[i];
+
+ return u;
+}
+
+static inline struct bch_sb *bchu_read_super(struct bchfs_handle fs, unsigned idx)
+{
+ size_t size = 4096;
+ struct bch_sb *sb = NULL;
+
+ while (1) {
+ sb = xrealloc(sb, size);
+ struct bch_ioctl_read_super i = {
+ .size = size,
+ .sb = (unsigned long) sb,
+ };
+
+ if (idx != -1) {
+ i.flags |= BCH_READ_DEV|BCH_BY_INDEX;
+ i.dev = idx;
+ }
+
+ if (!ioctl(fs.ioctl_fd, BCH_IOCTL_READ_SUPER, &i))
+ return sb;
+ if (errno != ERANGE)
+ die("BCH_IOCTL_READ_SUPER error: %m");
+ size *= 2;
+ }
+}
+
+static inline unsigned bchu_disk_get_idx(struct bchfs_handle fs, dev_t dev)
+{
+ struct bch_ioctl_disk_get_idx i = { .dev = dev };
+
+ return xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_GET_IDX, &i);
+}
+
+static inline void bchu_disk_resize(struct bchfs_handle fs,
+ unsigned idx,
+ u64 nbuckets)
+{
+ struct bch_ioctl_disk_resize i = {
+ .flags = BCH_BY_INDEX,
+ .dev = idx,
+ .nbuckets = nbuckets,
+ };
+
+ xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_RESIZE, &i);
+}
+
+static inline void bchu_disk_resize_journal(struct bchfs_handle fs,
+ unsigned idx,
+ u64 nbuckets)
+{
+ struct bch_ioctl_disk_resize i = {
+ .flags = BCH_BY_INDEX,
+ .dev = idx,
+ .nbuckets = nbuckets,
+ };
+
+ xioctl(fs.ioctl_fd, BCH_IOCTL_DISK_RESIZE_JOURNAL, &i);
+}
+
+int bchu_data(struct bchfs_handle, struct bch_ioctl_data);
+
+struct dev_name {
+ unsigned idx;
+ char *dev;
+ char *label;
+ uuid_t uuid;
+ unsigned durability;
+};
+typedef DARRAY(struct dev_name) dev_names;
+
+dev_names bchu_fs_get_devices(struct bchfs_handle);
+
+#endif /* _LIBBCACHE_H */
projects / bcachefs-tools-debian / blobdiff