mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 00:34:20 +08:00
1c6fdbd8f2
Initially forked from drivers/md/bcache, bcachefs is a new copy-on-write filesystem with every feature you could possibly want. Website: https://bcachefs.org Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#include "bcachefs.h"
|
|
#include "keylist.h"
|
|
|
|
int bch2_keylist_realloc(struct keylist *l, u64 *inline_u64s,
|
|
size_t nr_inline_u64s, size_t new_u64s)
|
|
{
|
|
size_t oldsize = bch_keylist_u64s(l);
|
|
size_t newsize = oldsize + new_u64s;
|
|
u64 *old_buf = l->keys_p == inline_u64s ? NULL : l->keys_p;
|
|
u64 *new_keys;
|
|
|
|
newsize = roundup_pow_of_two(newsize);
|
|
|
|
if (newsize <= nr_inline_u64s ||
|
|
(old_buf && roundup_pow_of_two(oldsize) == newsize))
|
|
return 0;
|
|
|
|
new_keys = krealloc(old_buf, sizeof(u64) * newsize, GFP_NOIO);
|
|
if (!new_keys)
|
|
return -ENOMEM;
|
|
|
|
if (!old_buf)
|
|
memcpy_u64s(new_keys, inline_u64s, oldsize);
|
|
|
|
l->keys_p = new_keys;
|
|
l->top_p = new_keys + oldsize;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void bch2_keylist_add_in_order(struct keylist *l, struct bkey_i *insert)
|
|
{
|
|
struct bkey_i *where;
|
|
|
|
for_each_keylist_key(l, where)
|
|
if (bkey_cmp(insert->k.p, where->k.p) < 0)
|
|
break;
|
|
|
|
memmove_u64s_up((u64 *) where + insert->k.u64s,
|
|
where,
|
|
((u64 *) l->top) - ((u64 *) where));
|
|
|
|
l->top_p += insert->k.u64s;
|
|
bkey_copy(where, insert);
|
|
}
|
|
|
|
void bch2_keylist_pop_front(struct keylist *l)
|
|
{
|
|
l->top_p -= bch2_keylist_front(l)->k.u64s;
|
|
|
|
memmove_u64s_down(l->keys,
|
|
bkey_next(l->keys),
|
|
bch_keylist_u64s(l));
|
|
}
|
|
|
|
#ifdef CONFIG_BCACHEFS_DEBUG
|
|
void bch2_verify_keylist_sorted(struct keylist *l)
|
|
{
|
|
struct bkey_i *k;
|
|
|
|
for_each_keylist_key(l, k)
|
|
BUG_ON(bkey_next(k) != l->top &&
|
|
bkey_cmp(k->k.p, bkey_next(k)->k.p) >= 0);
|
|
}
|
|
#endif
|