git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/alloc_foreground.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_ALLOC_FOREGROUND_H
   3 #define _BCACHEFS_ALLOC_FOREGROUND_H
   4
   5 #include "bcachefs.h"
   6 #include "alloc_types.h"
   7 #include "extents.h"
   8 #include "super.h"
   9
  10 #include <linux/hash.h>
  11
  12 struct bkey;
  13 struct bch_dev;
  14 struct bch_fs;
  15 struct bch_devs_List;
  16
  17 extern const char * const bch2_alloc_reserves[];
  18
  19 void bch2_reset_alloc_cursors(struct bch_fs *);
  20
  21 struct dev_alloc_list {
  22         unsigned        nr;
  23         u8              devs[BCH_SB_MEMBERS_MAX];
  24 };
  25
  26 struct dev_alloc_list bch2_dev_alloc_list(struct bch_fs *,
  27                                           struct dev_stripe_state *,
  28                                           struct bch_devs_mask *);
  29 void bch2_dev_stripe_increment(struct bch_dev *, struct dev_stripe_state *);
  30
  31 long bch2_bucket_alloc_new_fs(struct bch_dev *);
  32
  33 struct open_bucket *bch2_bucket_alloc(struct bch_fs *, struct bch_dev *,
  34                                       enum alloc_reserve, bool,
  35                                       struct closure *);
  36
  37 static inline void ob_push(struct bch_fs *c, struct open_buckets *obs,
  38                            struct open_bucket *ob)
  39 {
  40         BUG_ON(obs->nr >= ARRAY_SIZE(obs->v));
  41
  42         obs->v[obs->nr++] = ob - c->open_buckets;
  43 }
  44
  45 #define open_bucket_for_each(_c, _obs, _ob, _i)                         \
  46         for ((_i) = 0;                                                  \
  47              (_i) < (_obs)->nr &&                                       \
  48              ((_ob) = (_c)->open_buckets + (_obs)->v[_i], true);        \
  49              (_i)++)
  50
  51 static inline struct open_bucket *ec_open_bucket(struct bch_fs *c,
  52                                                  struct open_buckets *obs)
  53 {
  54         struct open_bucket *ob;
  55         unsigned i;
  56
  57         open_bucket_for_each(c, obs, ob, i)
  58                 if (ob->ec)
  59                         return ob;
  60
  61         return NULL;
  62 }
  63
  64 void bch2_open_bucket_write_error(struct bch_fs *,
  65                         struct open_buckets *, unsigned);
  66
  67 void __bch2_open_bucket_put(struct bch_fs *, struct open_bucket *);
  68
  69 static inline void bch2_open_bucket_put(struct bch_fs *c, struct open_bucket *ob)
  70 {
  71         if (atomic_dec_and_test(&ob->pin))
  72                 __bch2_open_bucket_put(c, ob);
  73 }
  74
  75 static inline void bch2_open_buckets_put(struct bch_fs *c,
  76                                          struct open_buckets *ptrs)
  77 {
  78         struct open_bucket *ob;
  79         unsigned i;
  80
  81         open_bucket_for_each(c, ptrs, ob, i)
  82                 bch2_open_bucket_put(c, ob);
  83         ptrs->nr = 0;
  84 }
  85
  86 static inline void bch2_alloc_sectors_done_inlined(struct bch_fs *c, struct write_point *wp)
  87 {
  88         struct open_buckets ptrs = { .nr = 0 }, keep = { .nr = 0 };
  89         struct open_bucket *ob;
  90         unsigned i;
  91
  92         open_bucket_for_each(c, &wp->ptrs, ob, i)
  93                 ob_push(c, !ob->sectors_free ? &ptrs : &keep, ob);
  94         wp->ptrs = keep;
  95
  96         mutex_unlock(&wp->lock);
  97
  98         bch2_open_buckets_put(c, &ptrs);
  99 }
 100
 101 static inline void bch2_open_bucket_get(struct bch_fs *c,
 102                                         struct write_point *wp,
 103                                         struct open_buckets *ptrs)
 104 {
 105         struct open_bucket *ob;
 106         unsigned i;
 107
 108         open_bucket_for_each(c, &wp->ptrs, ob, i) {
 109                 ob->data_type = wp->data_type;
 110                 atomic_inc(&ob->pin);
 111                 ob_push(c, ptrs, ob);
 112         }
 113 }
 114
 115 static inline open_bucket_idx_t *open_bucket_hashslot(struct bch_fs *c,
 116                                                   unsigned dev, u64 bucket)
 117 {
 118         return c->open_buckets_hash +
 119                 (jhash_3words(dev, bucket, bucket >> 32, 0) &
 120                  (OPEN_BUCKETS_COUNT - 1));
 121 }
 122
 123 static inline bool bch2_bucket_is_open(struct bch_fs *c, unsigned dev, u64 bucket)
 124 {
 125         open_bucket_idx_t slot = *open_bucket_hashslot(c, dev, bucket);
 126
 127         while (slot) {
 128                 struct open_bucket *ob = &c->open_buckets[slot];
 129
 130                 if (ob->dev == dev && ob->bucket == bucket)
 131                         return true;
 132
 133                 slot = ob->hash;
 134         }
 135
 136         return false;
 137 }
 138
 139 static inline bool bch2_bucket_is_open_safe(struct bch_fs *c, unsigned dev, u64 bucket)
 140 {
 141         bool ret;
 142
 143         if (bch2_bucket_is_open(c, dev, bucket))
 144                 return true;
 145
 146         spin_lock(&c->freelist_lock);
 147         ret = bch2_bucket_is_open(c, dev, bucket);
 148         spin_unlock(&c->freelist_lock);
 149
 150         return ret;
 151 }
 152
 153 int bch2_bucket_alloc_set(struct bch_fs *, struct open_buckets *,
 154                       struct dev_stripe_state *, struct bch_devs_mask *,
 155                       unsigned, unsigned *, bool *, enum alloc_reserve,
 156                       unsigned, struct closure *);
 157
 158 int bch2_alloc_sectors_start_trans(struct btree_trans *,
 159                                    unsigned, unsigned,
 160                                    struct write_point_specifier,
 161                                    struct bch_devs_list *,
 162                                    unsigned, unsigned,
 163                                    enum alloc_reserve,
 164                                    unsigned,
 165                                    struct closure *,
 166                                    struct write_point **);
 167
 168 struct bch_extent_ptr bch2_ob_ptr(struct bch_fs *, struct open_bucket *);
 169
 170 /*
 171  * Append pointers to the space we just allocated to @k, and mark @sectors space
 172  * as allocated out of @ob
 173  */
 174 static inline void
 175 bch2_alloc_sectors_append_ptrs_inlined(struct bch_fs *c, struct write_point *wp,
 176                                        struct bkey_i *k, unsigned sectors,
 177                                        bool cached)
 178 {
 179         struct open_bucket *ob;
 180         unsigned i;
 181
 182         BUG_ON(sectors > wp->sectors_free);
 183         wp->sectors_free        -= sectors;
 184         wp->sectors_allocated   += sectors;
 185
 186         open_bucket_for_each(c, &wp->ptrs, ob, i) {
 187                 struct bch_dev *ca = bch_dev_bkey_exists(c, ob->dev);
 188                 struct bch_extent_ptr ptr = bch2_ob_ptr(c, ob);
 189
 190                 ptr.cached = cached ||
 191                         (!ca->mi.durability &&
 192                          wp->data_type == BCH_DATA_user);
 193
 194                 bch2_bkey_append_ptr(k, ptr);
 195
 196                 BUG_ON(sectors > ob->sectors_free);
 197                 ob->sectors_free -= sectors;
 198         }
 199 }
 200
 201 void bch2_alloc_sectors_append_ptrs(struct bch_fs *, struct write_point *,
 202                                     struct bkey_i *, unsigned, bool);
 203 void bch2_alloc_sectors_done(struct bch_fs *, struct write_point *);
 204
 205 void bch2_open_buckets_stop_dev(struct bch_fs *, struct bch_dev *,
 206                                 struct open_buckets *);
 207
 208 void bch2_writepoint_stop(struct bch_fs *, struct bch_dev *,
 209                           struct write_point *);
 210
 211 static inline struct write_point_specifier writepoint_hashed(unsigned long v)
 212 {
 213         return (struct write_point_specifier) { .v = v | 1 };
 214 }
 215
 216 static inline struct write_point_specifier writepoint_ptr(struct write_point *wp)
 217 {
 218         return (struct write_point_specifier) { .v = (unsigned long) wp };
 219 }
 220
 221 void bch2_fs_allocator_foreground_init(struct bch_fs *);
 222
 223 void bch2_open_buckets_to_text(struct printbuf *, struct bch_fs *);
 224
 225 void bch2_write_points_to_text(struct printbuf *, struct bch_fs *);
 226
 227 #endif /* _BCACHEFS_ALLOC_FOREGROUND_H */