bcacheadm: add command to modify sysfs attributes for

[bcachefs-tools-debian] / bcache.h

diff --git a/bcache.h b/bcache.h
index eab2195df5b4d26b1c6f33e1d2d76704f4a3d1b5..dc79d066521460284f3716b41e371cb42201d38e 100644 (file)
--- a/bcache.h
+++ b/bcache.h
@@ -1,44 +1,120 @@
+/*
+ * Author: Kent Overstreet <kmo@daterainc.com>
+ *
+ * GPLv2
+ */
+
 #ifndef _BCACHE_H
 #define _BCACHE_H
 
-static const char bcache_magic[] = {
-       0xc6, 0x85, 0x73, 0xf6, 0x4e, 0x1a, 0x45, 0xca,
-       0x82, 0x65, 0xf5, 0x7f, 0x48, 0xba, 0x6d, 0x81 };
+#include <linux/bcache.h>
+#include <dirent.h>
+
+typedef __u8   u8;
+typedef __u16  u16;
+typedef __u32  u32;
+typedef __u64  u64;
+
+typedef __s8   s8;
+typedef __s16  s16;
+typedef __s32  s32;
+typedef __s64  s64;
 
-#define SB_SECTOR              8
-#define SB_LABEL_SIZE          32
+#define SB_START               (SB_SECTOR * 512)
+#define MAX_PATH               256
 
-struct cache_sb {
-       uint64_t                csum;
-       uint64_t                offset; /* sector where this sb was written */
-       uint64_t                version;
-#define CACHE_BACKING_DEV      1
 
-       uint8_t                 magic[16];
+#define max(x, y) ({                           \
+       typeof(x) _max1 = (x);                  \
+       typeof(y) _max2 = (y);                  \
+       (void) (&_max1 == &_max2);              \
+       _max1 > _max2 ? _max1 : _max2; })
 
-       uint8_t                 uuid[16];
-       union {
-               uint8_t         set_uuid[16];
-               uint64_t        set_magic;
-       };
-       uint8_t                 label[SB_LABEL_SIZE];
+extern const char * const cache_state[];
+extern const char * const replacement_policies[];
+extern const char * const csum_types[];
+extern const char * const bdev_cache_mode[];
+extern const char * const bdev_state[];
 
-       uint64_t                flags;
-       uint64_t                seq;
-       uint64_t                pad[8];
+ssize_t read_string_list(const char *, const char * const[]);
+ssize_t read_string_list_or_die(const char *, const char * const[],
+                               const char *);
+void print_string_list(const char * const[], size_t);
 
-       uint64_t                nbuckets;       /* device size */
-       uint16_t                block_size;     /* sectors */
-       uint16_t                bucket_size;    /* sectors */
+uint64_t bch_checksum(unsigned, const void *, size_t);
 
-       uint16_t                nr_in_set;
-       uint16_t                nr_this_dev;
+uint64_t getblocks(int);
+uint64_t hatoi(const char *);
+unsigned hatoi_validate(const char *, const char *);
+void write_backingdev_sb(int, unsigned, unsigned *,    bool, uint64_t,
+                               const char *, uuid_le);
+int dev_open(const char *, bool);
+void write_cache_sbs(int *, struct cache_sb *, unsigned, unsigned *, int);
+void next_cache_device(struct cache_sb *, unsigned, int, unsigned, bool);
+unsigned get_blocksize(const char *);
+long strtoul_or_die(const char *, size_t, const char *);
 
-       uint32_t                last_mount;     /* time_t */
+void show_super_backingdev(struct cache_sb *, bool);
+void show_super_cache(struct cache_sb *, bool);
+
+enum sysfs_attr {SET_ATTR, CACHE_ATTR, INTERNAL_ATTR};
+
+static const char *set_attrs[] = {
+       "btree_flush_delay",
+       "btree_scan_ratelimit",
+       "bucket_reserve_percent",
+       "cache_reserve_percent",
+       "checksum_type",
+       "congested_read_threshold_us",
+       "congested_write_threshold_us",
+       "data_replicas",
+       "errors",
+       "foreground_target_percent",
+       "gc_sector_percent",
+       "journal_delay_ms",
+       "meta_replicas",
+       "sector_reserve_percent",
+       "tiering_percent",
+       NULL
+};
 
-       uint16_t                first_bucket;
-       uint16_t                keys;           /* number of journal buckets */
-       uint64_t                d[512];         /* journal buckets */
+static const char *cache_attrs[] = {
+       "cache_replacement_policy",
+       "discard",
+       "state",
+       "tier",
+       NULL
 };
 
+static const char *internal_attrs[] = {
+       "btree_shrinker_disabled",
+       "copy_gc_enabled",
+       "foreground_write_rate",
+       "tiering_enabled",
+       "tiering_rate",
+       NULL
+};
+
+enum sysfs_attr sysfs_attr_type(char *attr);
+void sysfs_attr_list();
+
+struct cache_sb *query_dev(char *, bool, bool, bool, char *dev_uuid);
+char *list_cachesets(char *, bool);
+char *parse_array_to_list(char *const *);
+char *register_bcache(char *const *);
+char *unregister_bcache(char *const *);
+char *probe(char *, int);
+char *read_stat_dir(DIR *, char *, char *, bool);
+char *find_matching_uuid(char *, char *, const char*);
+char *add_devices(char *const *, char *);
+char *remove_device(const char *, bool);
+
+#define csum_set(i, type)                                              \
+({                                                                     \
+       void *start = ((void *) (i)) + sizeof(uint64_t);                \
+       void *end = bset_bkey_last(i);                                  \
+                                                                       \
+       bch_checksum(type, start, end - start);                         \
+})
+
 #endif