| 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 "file.h" |
| 13 | #include "fio.h" |
| 14 | |
| 15 | #include "pshared.h" |
| 16 | #include "fdp.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) + 128 * sizeof(*ruhs->plis)); |
| 49 | if (!ruhs) |
| 50 | return -ENOMEM; |
| 51 | |
| 52 | ret = fdp_ruh_info(td, f, ruhs); |
| 53 | if (ret) { |
| 54 | log_info("fio: ruh info failed for %s (%d)\n", |
| 55 | f->file_name, -ret); |
| 56 | goto out; |
| 57 | } |
| 58 | |
| 59 | if (ruhs->nr_ruhs > 128) |
| 60 | ruhs->nr_ruhs = 128; |
| 61 | |
| 62 | if (td->o.fdp_nrpli == 0) { |
| 63 | f->ruhs_info = ruhs; |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | for (i = 0; i < td->o.fdp_nrpli; i++) { |
| 68 | if (td->o.fdp_plis[i] > ruhs->nr_ruhs) { |
| 69 | ret = -EINVAL; |
| 70 | goto out; |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | tmp = scalloc(1, sizeof(*tmp) + ruhs->nr_ruhs * sizeof(*tmp->plis)); |
| 75 | if (!tmp) { |
| 76 | ret = -ENOMEM; |
| 77 | goto out; |
| 78 | } |
| 79 | |
| 80 | tmp->nr_ruhs = td->o.fdp_nrpli; |
| 81 | for (i = 0; i < td->o.fdp_nrpli; i++) |
| 82 | tmp->plis[i] = ruhs->plis[td->o.fdp_plis[i]]; |
| 83 | f->ruhs_info = tmp; |
| 84 | out: |
| 85 | sfree(ruhs); |
| 86 | return ret; |
| 87 | } |
| 88 | |
| 89 | int fdp_init(struct thread_data *td) |
| 90 | { |
| 91 | struct fio_file *f; |
| 92 | int i, ret = 0; |
| 93 | |
| 94 | for_each_file(td, f, i) { |
| 95 | ret = init_ruh_info(td, f); |
| 96 | if (ret) |
| 97 | break; |
| 98 | } |
| 99 | return ret; |
| 100 | } |
| 101 | |
| 102 | void fdp_free_ruhs_info(struct fio_file *f) |
| 103 | { |
| 104 | if (!f->ruhs_info) |
| 105 | return; |
| 106 | sfree(f->ruhs_info); |
| 107 | f->ruhs_info = NULL; |
| 108 | } |
| 109 | |
| 110 | void fdp_fill_dspec_data(struct thread_data *td, struct io_u *io_u) |
| 111 | { |
| 112 | struct fio_file *f = io_u->file; |
| 113 | struct fio_ruhs_info *ruhs = f->ruhs_info; |
| 114 | int dspec; |
| 115 | |
| 116 | if (!ruhs || io_u->ddir != DDIR_WRITE) { |
| 117 | io_u->dtype = 0; |
| 118 | io_u->dspec = 0; |
| 119 | return; |
| 120 | } |
| 121 | |
| 122 | dspec = ruhs->plis[ruhs->pli_loc++ % ruhs->nr_ruhs]; |
| 123 | io_u->dtype = 2; |
| 124 | io_u->dspec = dspec; |
| 125 | } |