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 "sb-members.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_watermarks[];
  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 bch_watermark, struct closure *);
  35
  36 static inline void ob_push(struct bch_fs *c, struct open_buckets *obs,
  37                            struct open_bucket *ob)
  38 {
  39         BUG_ON(obs->nr >= ARRAY_SIZE(obs->v));
  40
  41         obs->v[obs->nr++] = ob - c->open_buckets;
  42 }
  43
  44 #define open_bucket_for_each(_c, _obs, _ob, _i)                         \
  45         for ((_i) = 0;                                                  \
  46              (_i) < (_obs)->nr &&                                       \
  47              ((_ob) = (_c)->open_buckets + (_obs)->v[_i], true);        \
  48              (_i)++)
  49
  50 static inline struct open_bucket *ec_open_bucket(struct bch_fs *c,
  51                                                  struct open_buckets *obs)
  52 {
  53         struct open_bucket *ob;
  54         unsigned i;
  55
  56         open_bucket_for_each(c, obs, ob, i)
  57                 if (ob->ec)
  58                         return ob;
  59
  60         return NULL;
  61 }
  62
  63 void bch2_open_bucket_write_error(struct bch_fs *,
  64                         struct open_buckets *, unsigned);
  65
  66 void __bch2_open_bucket_put(struct bch_fs *, struct open_bucket *);
  67
  68 static inline void bch2_open_bucket_put(struct bch_fs *c, struct open_bucket *ob)
  69 {
  70         if (atomic_dec_and_test(&ob->pin))
  71                 __bch2_open_bucket_put(c, ob);
  72 }
  73
  74 static inline void bch2_open_buckets_put(struct bch_fs *c,
  75                                          struct open_buckets *ptrs)
  76 {
  77         struct open_bucket *ob;
  78         unsigned i;
  79
  80         open_bucket_for_each(c, ptrs, ob, i)
  81                 bch2_open_bucket_put(c, ob);
  82         ptrs->nr = 0;
  83 }
  84
  85 static inline void bch2_alloc_sectors_done_inlined(struct bch_fs *c, struct write_point *wp)
  86 {
  87         struct open_buckets ptrs = { .nr = 0 }, keep = { .nr = 0 };
  88         struct open_bucket *ob;
  89         unsigned i;
  90
  91         open_bucket_for_each(c, &wp->ptrs, ob, i)
  92                 ob_push(c, !ob->sectors_free ? &ptrs : &keep, ob);
  93         wp->ptrs = keep;
  94
  95         mutex_unlock(&wp->lock);
  96
  97         bch2_open_buckets_put(c, &ptrs);
  98 }
  99
 100 static inline void bch2_open_bucket_get(struct bch_fs *c,
 101                                         struct write_point *wp,
 102                                         struct open_buckets *ptrs)
 103 {
 104         struct open_bucket *ob;
 105         unsigned i;
 106
 107         open_bucket_for_each(c, &wp->ptrs, ob, i) {
 108                 ob->data_type = wp->data_type;
 109                 atomic_inc(&ob->pin);
 110                 ob_push(c, ptrs, ob);
 111         }
 112 }
 113
 114 static inline open_bucket_idx_t *open_bucket_hashslot(struct bch_fs *c,
 115                                                   unsigned dev, u64 bucket)
 116 {
 117         return c->open_buckets_hash +
 118                 (jhash_3words(dev, bucket, bucket >> 32, 0) &
 119                  (OPEN_BUCKETS_COUNT - 1));
 120 }
 121
 122 static inline bool bch2_bucket_is_open(struct bch_fs *c, unsigned dev, u64 bucket)
 123 {
 124         open_bucket_idx_t slot = *open_bucket_hashslot(c, dev, bucket);
 125
 126         while (slot) {
 127                 struct open_bucket *ob = &c->open_buckets[slot];
 128
 129                 if (ob->dev == dev && ob->bucket == bucket)
 130                         return true;
 131
 132                 slot = ob->hash;
 133         }
 134
 135         return false;
 136 }
 137
 138 static inline bool bch2_bucket_is_open_safe(struct bch_fs *c, unsigned dev, u64 bucket)
 139 {
 140         bool ret;
 141
 142         if (bch2_bucket_is_open(c, dev, bucket))
 143                 return true;
 144
 145         spin_lock(&c->freelist_lock);
 146         ret = bch2_bucket_is_open(c, dev, bucket);
 147         spin_unlock(&c->freelist_lock);
 148
 149         return ret;
 150 }
 151
 152 int bch2_bucket_alloc_set_trans(struct btree_trans *, struct open_buckets *,
 153                       struct dev_stripe_state *, struct bch_devs_mask *,
 154                       unsigned, unsigned *, bool *, unsigned,
 155                       enum bch_data_type, enum bch_watermark,
 156                       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 bch_watermark,
 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(struct bch_fs *c, struct bch_dev *, bool);
 206
 207 static inline struct write_point_specifier writepoint_hashed(unsigned long v)
 208 {
 209         return (struct write_point_specifier) { .v = v | 1 };
 210 }
 211
 212 static inline struct write_point_specifier writepoint_ptr(struct write_point *wp)
 213 {
 214         return (struct write_point_specifier) { .v = (unsigned long) wp };
 215 }
 216
 217 void bch2_fs_allocator_foreground_init(struct bch_fs *);
 218
 219 void bch2_open_buckets_to_text(struct printbuf *, struct bch_fs *);
 220 void bch2_open_buckets_partial_to_text(struct printbuf *, struct bch_fs *);
 221
 222 void bch2_write_points_to_text(struct printbuf *, struct bch_fs *);
 223
 224 #endif /* _BCACHEFS_ALLOC_FOREGROUND_H */