Commit | Line | Data |
---|---|---|
0d29de83 JA |
1 | /* |
2 | * TRIM/DISCARD support | |
3 | */ | |
0d29de83 JA |
4 | #include <string.h> |
5 | #include <assert.h> | |
0d29de83 JA |
6 | |
7 | #include "fio.h" | |
8 | #include "trim.h" | |
9 | ||
10 | #ifdef FIO_HAVE_TRIM | |
917c64b3 | 11 | bool get_next_trim(struct thread_data *td, struct io_u *io_u) |
0d29de83 JA |
12 | { |
13 | struct io_piece *ipo; | |
14 | ||
15 | /* | |
16 | * this io_u is from a requeue, we already filled the offsets | |
17 | */ | |
18 | if (io_u->file) | |
917c64b3 | 19 | return true; |
0d29de83 | 20 | if (flist_empty(&td->trim_list)) |
917c64b3 | 21 | return false; |
0d29de83 JA |
22 | |
23 | assert(td->trim_entries); | |
9342d5f8 | 24 | ipo = flist_first_entry(&td->trim_list, struct io_piece, trim_list); |
0d29de83 | 25 | remove_trim_entry(td, ipo); |
a917a8b3 JA |
26 | |
27 | io_u->offset = ipo->offset; | |
28 | io_u->buflen = ipo->len; | |
29 | io_u->file = ipo->file; | |
0d29de83 JA |
30 | |
31 | /* | |
32 | * If not verifying that trimmed ranges return zeroed data, | |
33 | * remove this from the to-read verify lists | |
34 | */ | |
35 | if (!td->o.trim_zero) { | |
36 | if (ipo->flags & IP_F_ONLIST) | |
37 | flist_del(&ipo->list); | |
38 | else { | |
39 | assert(ipo->flags & IP_F_ONRB); | |
40 | rb_erase(&ipo->rb_node, &td->io_hist_tree); | |
41 | } | |
42 | td->io_hist_len--; | |
a917a8b3 JA |
43 | free(ipo); |
44 | } else | |
45 | ipo->flags |= IP_F_TRIMMED; | |
0d29de83 JA |
46 | |
47 | if (!fio_file_open(io_u->file)) { | |
48 | int r = td_io_open_file(td, io_u->file); | |
49 | ||
50 | if (r) { | |
51 | dprint(FD_VERIFY, "failed file %s open\n", | |
52 | io_u->file->file_name); | |
917c64b3 | 53 | return false; |
0d29de83 JA |
54 | } |
55 | } | |
56 | ||
a917a8b3 | 57 | get_file(io_u->file); |
0d29de83 JA |
58 | assert(fio_file_open(io_u->file)); |
59 | io_u->ddir = DDIR_TRIM; | |
60 | io_u->xfer_buf = NULL; | |
61 | io_u->xfer_buflen = io_u->buflen; | |
62 | ||
0d29de83 | 63 | dprint(FD_VERIFY, "get_next_trim: ret io_u %p\n", io_u); |
917c64b3 | 64 | return true; |
0d29de83 JA |
65 | } |
66 | ||
917c64b3 | 67 | bool io_u_should_trim(struct thread_data *td, struct io_u *io_u) |
0d29de83 JA |
68 | { |
69 | unsigned long long val; | |
c3546b53 | 70 | uint64_t frand_max; |
1294c3ec | 71 | unsigned long r; |
0d29de83 JA |
72 | |
73 | if (!td->o.trim_percentage) | |
917c64b3 | 74 | return false; |
0d29de83 | 75 | |
c3546b53 | 76 | frand_max = rand_max(&td->trim_state); |
d6b72507 | 77 | r = __rand(&td->trim_state); |
c3546b53 | 78 | val = (frand_max / 100ULL); |
0d29de83 | 79 | |
4c07ad86 | 80 | val *= (unsigned long long) td->o.trim_percentage; |
0d29de83 JA |
81 | return r <= val; |
82 | } | |
83 | #endif |