diff options
author | Thomas Bertschinger <tahbertschinger@gmail.com> | 2024-01-15 23:41:02 -0700 |
---|---|---|
committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-01-16 01:47:05 -0500 |
commit | f5baaf48e3e82b1caf9f5cd1207d4d6feba3a2e5 (patch) | |
tree | 59f7b0e4667df7a9d3d5a45725f2aaab3e79b4c5 /c_src/libbcachefs.h | |
parent | fb35dbfdc5a9446fbb856dae5542b23963e28b89 (diff) |
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>
Diffstat (limited to 'c_src/libbcachefs.h')
-rw-r--r-- | c_src/libbcachefs.h | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/c_src/libbcachefs.h b/c_src/libbcachefs.h new file mode 100644 index 00000000..b189a208 --- /dev/null +++ b/c_src/libbcachefs.h @@ -0,0 +1,267 @@ +#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 */ |