1 /* 2 * glusterfs engine 3 * 4 * IO engine using Glusterfs's gfapi async interface 5 * 6 */ 7 #include "gfapi.h" 8 #define NOT_YET 1 9 struct fio_gf_iou { 10 struct io_u *io_u; 11 int io_complete; 12 }; 13 14 static struct io_u *fio_gf_event(struct thread_data *td, int event) 15 { 16 struct gf_data *gf_data = td->io_ops->data; 17 18 dprint(FD_IO, "%s\n", __FUNCTION__); 19 return gf_data->aio_events[event]; 20 } 21 22 static int fio_gf_getevents(struct thread_data *td, unsigned int min, 23 unsigned int max, const struct timespec *t) 24 { 25 struct gf_data *g = td->io_ops->data; 26 unsigned int events = 0; 27 struct io_u *io_u; 28 int i; 29 30 dprint(FD_IO, "%s\n", __FUNCTION__); 31 do { 32 io_u_qiter(&td->io_u_all, io_u, i) { 33 struct fio_gf_iou *io; 34 35 if (!(io_u->flags & IO_U_F_FLIGHT)) 36 continue; 37 38 io = io_u->engine_data; 39 if (io->io_complete) { 40 io->io_complete = 0; 41 g->aio_events[events] = io_u; 42 events++; 43 44 if (events >= max) 45 break; 46 } 47 48 } 49 if (events < min) 50 usleep(100); 51 else 52 break; 53 54 } while (1); 55 56 return events; 57 } 58 59 static void fio_gf_io_u_free(struct thread_data *td, struct io_u *io_u) 60 { 61 struct fio_gf_iou *io = io_u->engine_data; 62 63 if (io) { 64 if (io->io_complete) 65 log_err("incomplete IO found.\n"); 66 io_u->engine_data = NULL; 67 free(io); 68 } 69 } 70 71 static int fio_gf_io_u_init(struct thread_data *td, struct io_u *io_u) 72 { 73 dprint(FD_FILE, "%s\n", __FUNCTION__); 74 75 if (!io_u->engine_data) { 76 struct fio_gf_iou *io; 77 78 io = malloc(sizeof(struct fio_gf_iou)); 79 if (!io) { 80 td_verror(td, errno, "malloc"); 81 return 1; 82 } 83 io->io_complete = 0; 84 io->io_u = io_u; 85 io_u->engine_data = io; 86 } 87 return 0; 88 } 89 90 static void gf_async_cb(glfs_fd_t * fd, ssize_t ret, void *data) 91 { 92 struct io_u *io_u = data; 93 struct fio_gf_iou *iou = io_u->engine_data; 94 95 dprint(FD_IO, "%s ret %lu\n", __FUNCTION__, ret); 96 iou->io_complete = 1; 97 } 98 99 static int fio_gf_async_queue(struct thread_data fio_unused * td, 100 struct io_u *io_u) 101 { 102 struct gf_data *g = td->io_ops->data; 103 int r; 104 105 dprint(FD_IO, "%s op %s\n", __FUNCTION__, io_ddir_name(io_u->ddir)); 106 107 fio_ro_check(td, io_u); 108 109 if (io_u->ddir == DDIR_READ) 110 r = glfs_pread_async(g->fd, io_u->xfer_buf, io_u->xfer_buflen, 111 io_u->offset, 0, gf_async_cb, io_u); 112 else if (io_u->ddir == DDIR_WRITE) 113 r = glfs_pwrite_async(g->fd, io_u->xfer_buf, io_u->xfer_buflen, 114 io_u->offset, 0, gf_async_cb, io_u); 115 #if defined(CONFIG_GF_TRIM) 116 else if (io_u->ddir == DDIR_TRIM) 117 r = glfs_discard_async(g->fd, io_u->offset, io_u->xfer_buflen, 118 gf_async_cb, io_u); 119 #endif 120 else if (io_u->ddir == DDIR_DATASYNC) 121 r = glfs_fdatasync_async(g->fd, gf_async_cb, io_u); 122 else if (io_u->ddir == DDIR_SYNC) 123 r = glfs_fsync_async(g->fd, gf_async_cb, io_u); 124 else 125 r = EINVAL; 126 127 if (r) { 128 log_err("glfs queue failed.\n"); 129 io_u->error = r; 130 goto failed; 131 } 132 return FIO_Q_QUEUED; 133 134 failed: 135 io_u->error = r; 136 td_verror(td, io_u->error, "xfer"); 137 return FIO_Q_COMPLETED; 138 } 139 140 int fio_gf_async_setup(struct thread_data *td) 141 { 142 struct gf_data *g; 143 int r; 144 145 #if defined(NOT_YET) 146 log_err("the async interface is still very experimental...\n"); 147 #endif 148 r = fio_gf_setup(td); 149 if (r) 150 return r; 151 152 td->o.use_thread = 1; 153 g = td->io_ops->data; 154 g->aio_events = calloc(td->o.iodepth, sizeof(struct io_u *)); 155 if (!g->aio_events) { 156 r = -ENOMEM; 157 fio_gf_cleanup(td); 158 return r; 159 } 160 161 return r; 162 } 163 164 static struct ioengine_ops ioengine = { 165 .name = "gfapi_async", 166 .version = FIO_IOOPS_VERSION, 167 .init = fio_gf_async_setup, 168 .cleanup = fio_gf_cleanup, 169 .queue = fio_gf_async_queue, 170 .open_file = fio_gf_open_file, 171 .close_file = fio_gf_close_file, 172 .unlink_file = fio_gf_unlink_file, 173 .get_file_size = fio_gf_get_file_size, 174 .getevents = fio_gf_getevents, 175 .event = fio_gf_event, 176 .io_u_init = fio_gf_io_u_init, 177 .io_u_free = fio_gf_io_u_free, 178 .options = gfapi_options, 179 .option_struct_size = sizeof(struct gf_options), 180 .flags = FIO_DISKLESSIO, 181 }; 182 183 static void fio_init fio_gf_register(void) 184 { 185 register_ioengine(&ioengine); 186 } 187 188 static void fio_exit fio_gf_unregister(void) 189 { 190 unregister_ioengine(&ioengine); 191 } 192
