Update close file handler to return potential error
[fio.git] / engines / mmap.c
CommitLineData
2866c82d 1/*
da751ca9
JA
2 * mmap engine
3 *
4 * IO engine that reads/writes from files by doing memcpy to/from
5 * a memory mapped region of the file.
2866c82d
JA
6 *
7 */
8#include <stdio.h>
9#include <stdlib.h>
10#include <unistd.h>
11#include <errno.h>
12#include <assert.h>
13#include <sys/mman.h>
5f350952
JA
14
15#include "../fio.h"
2866c82d 16
2866c82d
JA
17static int fio_mmapio_queue(struct thread_data *td, struct io_u *io_u)
18{
53cdc686
JA
19 struct fio_file *f = io_u->file;
20 unsigned long long real_off = io_u->offset - f->file_offset;
2866c82d 21
7101d9c2
JA
22 fio_ro_check(td, io_u);
23
2866c82d 24 if (io_u->ddir == DDIR_READ)
cec6b55d 25 memcpy(io_u->xfer_buf, f->mmap + real_off, io_u->xfer_buflen);
87dc1ab1 26 else if (io_u->ddir == DDIR_WRITE)
cec6b55d 27 memcpy(f->mmap + real_off, io_u->xfer_buf, io_u->xfer_buflen);
b907a5b5 28 else if (io_u->ddir == DDIR_SYNC) {
7bb48f84 29 size_t len = (f->io_size + page_size - 1) & ~page_mask;
cfc99db7
JA
30
31 if (msync(f->mmap, len, MS_SYNC)) {
b907a5b5 32 io_u->error = errno;
cfc99db7
JA
33 td_verror(td, io_u->error, "msync");
34 }
b907a5b5 35 }
2866c82d
JA
36
37 /*
38 * not really direct, but should drop the pages from the cache
39 */
2dc1bbeb 40 if (td->o.odirect && io_u->ddir != DDIR_SYNC) {
cfc99db7
JA
41 size_t len = (io_u->xfer_buflen + page_size - 1) & ~page_mask;
42 unsigned long long off = real_off & ~page_mask;
43
44 if (msync(f->mmap + off, len, MS_SYNC) < 0) {
2866c82d 45 io_u->error = errno;
cfc99db7
JA
46 td_verror(td, io_u->error, "msync");
47 }
48 if (madvise(f->mmap + off, len, MADV_DONTNEED) < 0) {
2866c82d 49 io_u->error = errno;
cfc99db7
JA
50 td_verror(td, io_u->error, "madvise");
51 }
2866c82d
JA
52 }
53
36167d82 54 return FIO_Q_COMPLETED;
2866c82d
JA
55}
56
b5af8293
JA
57static int fio_mmapio_open(struct thread_data *td, struct fio_file *f)
58{
59 int ret, flags;
60
61 ret = generic_open_file(td, f);
62 if (ret)
63 return ret;
64
c97d8369
JA
65 /*
66 * for size checkup, don't mmap anything.
67 */
68 if (!f->io_size)
69 return 0;
70
b5af8293
JA
71 if (td_rw(td))
72 flags = PROT_READ | PROT_WRITE;
73 else if (td_write(td)) {
74 flags = PROT_WRITE;
75
2dc1bbeb 76 if (td->o.verify != VERIFY_NONE)
b5af8293
JA
77 flags |= PROT_READ;
78 } else
79 flags = PROT_READ;
80
7bb48f84 81 f->mmap = mmap(NULL, f->io_size, flags, MAP_SHARED, f->fd, f->file_offset);
b5af8293
JA
82 if (f->mmap == MAP_FAILED) {
83 f->mmap = NULL;
84 td_verror(td, errno, "mmap");
85 goto err;
86 }
87
88 if (file_invalidate_cache(td, f))
89 goto err;
90
91 if (!td_random(td)) {
7bb48f84 92 if (madvise(f->mmap, f->io_size, MADV_SEQUENTIAL) < 0) {
b5af8293
JA
93 td_verror(td, errno, "madvise");
94 goto err;
95 }
96 } else {
7bb48f84 97 if (madvise(f->mmap, f->io_size, MADV_RANDOM) < 0) {
b5af8293
JA
98 td_verror(td, errno, "madvise");
99 goto err;
100 }
101 }
102
103 return 0;
104
105err:
0263882a 106 td->io_ops->close_file(td, f);
b5af8293
JA
107 return 1;
108}
109
6977bcd0
JA
110static int fio_mmapio_close(struct thread_data fio_unused *td,
111 struct fio_file *f)
b5af8293 112{
6977bcd0
JA
113 int ret = 0, ret2;
114
b5af8293 115 if (f->mmap) {
6977bcd0
JA
116 if (munmap(f->mmap, f->io_size) < 0)
117 ret = errno;
118
b5af8293
JA
119 f->mmap = NULL;
120 }
6977bcd0
JA
121
122 ret2 = generic_close_file(td, f);
123 if (!ret && ret2)
124 ret = ret2;
125
126 return ret;
b5af8293
JA
127}
128
5f350952 129static struct ioengine_ops ioengine = {
2866c82d
JA
130 .name = "mmap",
131 .version = FIO_IOOPS_VERSION,
2866c82d 132 .queue = fio_mmapio_queue,
b5af8293
JA
133 .open_file = fio_mmapio_open,
134 .close_file = fio_mmapio_close,
0263882a 135 .flags = FIO_SYNCIO | FIO_NOEXTEND,
2866c82d 136};
5f350952
JA
137
138static void fio_init fio_mmapio_register(void)
139{
140 register_ioengine(&ioengine);
141}
142
143static void fio_exit fio_mmapio_unregister(void)
144{
145 unregister_ioengine(&ioengine);
146}