Commit | Line | Data |
---|---|---|
0d29de83 JA |
1 | /* |
2 | * TRIM/DISCARD support | |
3 | */ | |
4 | #include <unistd.h> | |
5 | #include <fcntl.h> | |
6 | #include <string.h> | |
7 | #include <assert.h> | |
8 | #include <pthread.h> | |
9 | ||
10 | #include "fio.h" | |
11 | #include "trim.h" | |
12 | ||
13 | #ifdef FIO_HAVE_TRIM | |
14 | int get_next_trim(struct thread_data *td, struct io_u *io_u) | |
15 | { | |
16 | struct io_piece *ipo; | |
17 | ||
18 | /* | |
19 | * this io_u is from a requeue, we already filled the offsets | |
20 | */ | |
21 | if (io_u->file) | |
22 | return 0; | |
23 | if (flist_empty(&td->trim_list)) | |
24 | return 0; | |
25 | ||
26 | assert(td->trim_entries); | |
27 | ipo = flist_entry(td->trim_list.next, struct io_piece, trim_list); | |
28 | remove_trim_entry(td, ipo); | |
29 | ipo->flags |= IP_F_TRIMMED; | |
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--; | |
43 | } | |
44 | ||
45 | io_u->offset = ipo->offset; | |
46 | io_u->buflen = ipo->len; | |
47 | io_u->file = ipo->file; | |
48 | ||
49 | if (!fio_file_open(io_u->file)) { | |
50 | int r = td_io_open_file(td, io_u->file); | |
51 | ||
52 | if (r) { | |
53 | dprint(FD_VERIFY, "failed file %s open\n", | |
54 | io_u->file->file_name); | |
55 | return 1; | |
56 | } | |
57 | } | |
58 | ||
59 | get_file(ipo->file); | |
60 | assert(fio_file_open(io_u->file)); | |
61 | io_u->ddir = DDIR_TRIM; | |
62 | io_u->xfer_buf = NULL; | |
63 | io_u->xfer_buflen = io_u->buflen; | |
64 | ||
65 | free(ipo); | |
66 | dprint(FD_VERIFY, "get_next_trim: ret io_u %p\n", io_u); | |
67 | return 0; | |
68 | } | |
69 | ||
70 | int io_u_should_trim(struct thread_data *td, struct io_u *io_u) | |
71 | { | |
72 | unsigned long long val; | |
73 | long r; | |
74 | ||
75 | if (!td->o.trim_percentage) | |
76 | return 0; | |
77 | ||
78 | r = os_random_long(&td->trim_state); | |
79 | val = (OS_RAND_MAX / 100ULL); | |
80 | val *= (unsigned long long) td->o.trim_percentage; | |
81 | ||
82 | return r <= val; | |
83 | } | |
84 | #endif |