| 1 | /* |
| 2 | * Note: This is similar to a very basic setup |
| 3 | * of ZBD devices |
| 4 | * |
| 5 | * Specify fdp=1 (With char devices /dev/ng0n1) |
| 6 | */ |
| 7 | |
| 8 | #include <errno.h> |
| 9 | #include <string.h> |
| 10 | #include <stdlib.h> |
| 11 | #include <unistd.h> |
| 12 | #include "fio.h" |
| 13 | #include "file.h" |
| 14 | |
| 15 | #include "pshared.h" |
| 16 | #include "dataplacement.h" |
| 17 | |
| 18 | static int fdp_ruh_info(struct thread_data *td, struct fio_file *f, |
| 19 | struct fio_ruhs_info *ruhs) |
| 20 | { |
| 21 | int ret = -EINVAL; |
| 22 | |
| 23 | if (!td->io_ops) { |
| 24 | log_err("fio: no ops set in fdp init?!\n"); |
| 25 | return ret; |
| 26 | } |
| 27 | |
| 28 | if (td->io_ops->fdp_fetch_ruhs) { |
| 29 | ret = td->io_ops->fdp_fetch_ruhs(td, f, ruhs); |
| 30 | if (ret < 0) { |
| 31 | td_verror(td, errno, "fdp fetch ruhs failed"); |
| 32 | log_err("%s: fdp fetch ruhs failed (%d)\n", |
| 33 | f->file_name, errno); |
| 34 | } |
| 35 | } else { |
| 36 | log_err("%s: engine (%s) lacks fetch ruhs\n", |
| 37 | f->file_name, td->io_ops->name); |
| 38 | } |
| 39 | |
| 40 | return ret; |
| 41 | } |
| 42 | |
| 43 | static int init_ruh_info(struct thread_data *td, struct fio_file *f) |
| 44 | { |
| 45 | struct fio_ruhs_info *ruhs, *tmp; |
| 46 | int i, ret; |
| 47 | |
| 48 | ruhs = scalloc(1, sizeof(*ruhs) + FDP_MAX_RUHS * sizeof(*ruhs->plis)); |
| 49 | if (!ruhs) |
| 50 | return -ENOMEM; |
| 51 | |
| 52 | /* set up the data structure used for FDP to work with the supplied stream IDs */ |
| 53 | if (td->o.dp_type == FIO_DP_STREAMS) { |
| 54 | if (!td->o.dp_nr_ids) { |
| 55 | log_err("fio: stream IDs must be provided for dataplacement=streams\n"); |
| 56 | return -EINVAL; |
| 57 | } |
| 58 | ruhs->nr_ruhs = td->o.dp_nr_ids; |
| 59 | for (int i = 0; i < ruhs->nr_ruhs; i++) |
| 60 | ruhs->plis[i] = td->o.dp_ids[i]; |
| 61 | |
| 62 | f->ruhs_info = ruhs; |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | ret = fdp_ruh_info(td, f, ruhs); |
| 67 | if (ret) { |
| 68 | log_info("fio: ruh info failed for %s (%d)\n", |
| 69 | f->file_name, -ret); |
| 70 | goto out; |
| 71 | } |
| 72 | |
| 73 | if (ruhs->nr_ruhs > FDP_MAX_RUHS) |
| 74 | ruhs->nr_ruhs = FDP_MAX_RUHS; |
| 75 | |
| 76 | if (td->o.dp_nr_ids == 0) { |
| 77 | f->ruhs_info = ruhs; |
| 78 | return 0; |
| 79 | } |
| 80 | |
| 81 | for (i = 0; i < td->o.dp_nr_ids; i++) { |
| 82 | if (td->o.dp_ids[i] >= ruhs->nr_ruhs) { |
| 83 | ret = -EINVAL; |
| 84 | goto out; |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | tmp = scalloc(1, sizeof(*tmp) + ruhs->nr_ruhs * sizeof(*tmp->plis)); |
| 89 | if (!tmp) { |
| 90 | ret = -ENOMEM; |
| 91 | goto out; |
| 92 | } |
| 93 | |
| 94 | tmp->nr_ruhs = td->o.dp_nr_ids; |
| 95 | for (i = 0; i < td->o.dp_nr_ids; i++) |
| 96 | tmp->plis[i] = ruhs->plis[td->o.dp_ids[i]]; |
| 97 | f->ruhs_info = tmp; |
| 98 | out: |
| 99 | sfree(ruhs); |
| 100 | return ret; |
| 101 | } |
| 102 | |
| 103 | int dp_init(struct thread_data *td) |
| 104 | { |
| 105 | struct fio_file *f; |
| 106 | int i, ret = 0; |
| 107 | |
| 108 | for_each_file(td, f, i) { |
| 109 | ret = init_ruh_info(td, f); |
| 110 | if (ret) |
| 111 | break; |
| 112 | } |
| 113 | return ret; |
| 114 | } |
| 115 | |
| 116 | void fdp_free_ruhs_info(struct fio_file *f) |
| 117 | { |
| 118 | if (!f->ruhs_info) |
| 119 | return; |
| 120 | sfree(f->ruhs_info); |
| 121 | f->ruhs_info = NULL; |
| 122 | } |
| 123 | |
| 124 | void dp_fill_dspec_data(struct thread_data *td, struct io_u *io_u) |
| 125 | { |
| 126 | struct fio_file *f = io_u->file; |
| 127 | struct fio_ruhs_info *ruhs = f->ruhs_info; |
| 128 | int dspec; |
| 129 | |
| 130 | if (!ruhs || io_u->ddir != DDIR_WRITE) { |
| 131 | io_u->dtype = 0; |
| 132 | io_u->dspec = 0; |
| 133 | return; |
| 134 | } |
| 135 | |
| 136 | if (td->o.dp_id_select == FIO_DP_RR) { |
| 137 | if (ruhs->pli_loc >= ruhs->nr_ruhs) |
| 138 | ruhs->pli_loc = 0; |
| 139 | |
| 140 | dspec = ruhs->plis[ruhs->pli_loc++]; |
| 141 | } else { |
| 142 | ruhs->pli_loc = rand_between(&td->fdp_state, 0, ruhs->nr_ruhs - 1); |
| 143 | dspec = ruhs->plis[ruhs->pli_loc]; |
| 144 | } |
| 145 | |
| 146 | io_u->dtype = td->o.dp_type == FIO_DP_FDP ? FDP_DIR_DTYPE : STREAMS_DIR_DTYPE; |
| 147 | io_u->dspec = dspec; |
| 148 | dprint(FD_IO, "dtype set to 0x%x, dspec set to 0x%x\n", io_u->dtype, io_u->dspec); |
| 149 | } |