| 1 | /* |
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| 2 | * (C) 2011 Clemson University and The University of Chicago |
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| 3 | * |
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| 4 | * See COPYING in top-level directory. |
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| 5 | */ |
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| 6 | |
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| 7 | #include "usrint.h" |
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| 8 | #include "posix-ops.h" |
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| 9 | #include "openfile-util.h" |
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| 10 | #include "iocommon.h" |
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| 11 | #include "aiocommon.h" |
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| 12 | |
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| 13 | /* prototypes */ |
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| 14 | static void aiocommon_run_waiting_ops(void); |
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| 15 | static void aiocommon_run_op(struct pvfs_aiocb *p_cb); |
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| 16 | static void aiocommon_finish_op(struct pvfs_aiocb *p_cb); |
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| 17 | static void *aiocommon_progress(void *ptr); |
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| 18 | |
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| 19 | /* linked list variables used to implement aio structures */ |
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| 20 | static struct qlist_head *aio_waiting_list = NULL; |
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| 21 | static struct qlist_head *aio_running_list = NULL; |
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| 22 | static gen_mutex_t aio_wait_list_mutex = GEN_MUTEX_INITIALIZER; |
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| 23 | |
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| 24 | /* PROGRESS THREAD VARIABLES */ |
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| 25 | static pthread_t aio_progress_thread; |
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| 26 | static int aio_progress_status = PVFS_AIO_PROGRESS_IDLE; |
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| 27 | static int aio_num_ops_running = 0; |
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| 28 | static PVFS_sys_op_id aio_running_ops[PVFS_AIO_MAX_RUNNING] = {0}; |
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| 29 | |
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| 30 | /* Initialization of PVFS AIO system */ |
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| 31 | int aiocommon_init(void) |
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| 32 | { |
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| 33 | /* initialize waiting, running, and finished lists for aio implementation */ |
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| 34 | aio_waiting_list = (struct qlist_head *)malloc(sizeof(struct qlist_head)); |
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| 35 | if (aio_waiting_list == NULL) |
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| 36 | { |
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| 37 | return -1; |
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| 38 | } |
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| 39 | INIT_QLIST_HEAD(aio_waiting_list); |
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| 40 | |
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| 41 | aio_running_list = (struct qlist_head *)malloc(sizeof(struct qlist_head)); |
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| 42 | if (aio_running_list == NULL) |
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| 43 | { |
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| 44 | return -1; |
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| 45 | } |
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| 46 | INIT_QLIST_HEAD(aio_running_list); |
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| 47 | |
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| 48 | gossip_debug(GOSSIP_USRINT_DEBUG, "Successfully initalized PVFS AIO inteface\n"); |
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| 49 | |
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| 50 | return 0; |
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| 51 | } |
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| 52 | |
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| 53 | void aiocommon_submit_op(struct pvfs_aiocb *p_cb) |
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| 54 | { |
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| 55 | p_cb->error_code = EINPROGRESS; |
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| 56 | gen_mutex_lock(&aio_wait_list_mutex); |
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| 57 | qlist_add_tail(&(p_cb->link), aio_waiting_list); |
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| 58 | if (aio_progress_status == PVFS_AIO_PROGRESS_IDLE) |
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| 59 | { |
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| 60 | pthread_create(&aio_progress_thread, NULL, aiocommon_progress, NULL); |
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| 61 | aio_progress_status = PVFS_AIO_PROGRESS_RUNNING; |
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| 62 | } |
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| 63 | gen_mutex_unlock(&aio_wait_list_mutex); |
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| 64 | |
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| 65 | return; |
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| 66 | } |
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| 67 | |
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| 68 | static void aiocommon_run_waiting_ops(void) |
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| 69 | { |
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| 70 | struct qlist_head *next_op; |
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| 71 | struct pvfs_aiocb *p_cb; |
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| 72 | |
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| 73 | while(1) |
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| 74 | { |
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| 75 | gen_mutex_lock(&aio_wait_list_mutex); |
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| 76 | if (aio_num_ops_running == PVFS_AIO_MAX_RUNNING || |
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| 77 | qlist_empty(aio_waiting_list)) |
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| 78 | { |
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| 79 | gen_mutex_unlock(&aio_wait_list_mutex); |
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| 80 | break; |
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| 81 | } |
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| 82 | |
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| 83 | next_op = qlist_pop(aio_waiting_list); |
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| 84 | p_cb = qlist_entry(next_op, struct pvfs_aiocb, link); |
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| 85 | gossip_debug(GOSSIP_USRINT_DEBUG, "Adding AIO CB %p to running list\n", |
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| 86 | p_cb); |
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| 87 | |
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| 88 | gen_mutex_unlock(&aio_wait_list_mutex); |
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| 89 | aiocommon_run_op(p_cb); |
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| 90 | } |
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| 91 | |
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| 92 | return; |
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| 93 | } |
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| 94 | |
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| 95 | static void aiocommon_run_op(struct pvfs_aiocb *p_cb) |
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| 96 | { |
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| 97 | int rc = 0; |
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| 98 | PVFS_credential *cred; |
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| 99 | |
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| 100 | rc = iocommon_cred(&cred); |
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| 101 | |
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| 102 | switch(p_cb->op_code) |
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| 103 | { |
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| 104 | case PVFS_AIO_IO_OP: |
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| 105 | { |
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| 106 | rc = PVFS_Request_contiguous(p_cb->u.io.vector->iov_len, PVFS_BYTE, |
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| 107 | &(p_cb->u.io.file_req)); |
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| 108 | if (rc < 0) |
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| 109 | { |
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| 110 | rc = -PVFS_ENOMEM; |
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| 111 | break; |
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| 112 | } |
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| 113 | rc = pvfs_convert_iovec(p_cb->u.io.vector, 1, |
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| 114 | &(p_cb->u.io.mem_req), |
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| 115 | &(p_cb->u.io.sys_buf)); |
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| 116 | if (rc < 0) |
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| 117 | { |
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| 118 | rc = -PVFS_ENOMEM; |
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| 119 | break; |
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| 120 | } |
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| 121 | |
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| 122 | rc = PVFS_isys_io(p_cb->u.io.pd->s->pvfs_ref, |
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| 123 | p_cb->u.io.file_req, |
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| 124 | p_cb->u.io.offset, |
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| 125 | p_cb->u.io.sys_buf, |
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| 126 | p_cb->u.io.mem_req, |
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| 127 | cred, |
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| 128 | &(p_cb->u.io.io_resp), |
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| 129 | p_cb->u.io.which, |
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| 130 | &(p_cb->op_id), |
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| 131 | p_cb->hints, |
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| 132 | (void *)p_cb); |
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| 133 | break; |
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| 134 | } |
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| 135 | case PVFS_AIO_IOV_OP: |
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| 136 | { |
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| 137 | int i, size = 0; |
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| 138 | for (i = 0; i < p_cb->u.io.count; i++) |
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| 139 | { |
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| 140 | size += p_cb->u.io.vector[i].iov_len; |
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| 141 | } |
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| 142 | rc = PVFS_Request_contiguous(size, PVFS_BYTE, &(p_cb->u.io.file_req)); |
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| 143 | if (rc < 0) |
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| 144 | { |
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| 145 | rc = -PVFS_ENOMEM; |
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| 146 | break; |
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| 147 | } |
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| 148 | rc = pvfs_convert_iovec(p_cb->u.io.vector, p_cb->u.io.count, |
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| 149 | &(p_cb->u.io.mem_req), &(p_cb->u.io.sys_buf)); |
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| 150 | if (rc < 0) |
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| 151 | { |
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| 152 | rc = -PVFS_ENOMEM; |
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| 153 | break; |
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| 154 | } |
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| 155 | |
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| 156 | rc = PVFS_isys_io(p_cb->u.io.pd->s->pvfs_ref, |
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| 157 | p_cb->u.io.file_req, |
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| 158 | p_cb->u.io.offset, |
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| 159 | p_cb->u.io.sys_buf, |
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| 160 | p_cb->u.io.mem_req, |
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| 161 | cred, |
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| 162 | &(p_cb->u.io.io_resp), |
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| 163 | p_cb->u.io.which, |
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| 164 | &(p_cb->op_id), |
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| 165 | p_cb->hints, |
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| 166 | (void *)p_cb); |
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| 167 | break; |
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| 168 | } |
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| 169 | case PVFS_AIO_OPEN_OP: |
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| 170 | { |
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| 171 | rc = PVFS_iaio_open(&(p_cb->u.open.pd), |
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| 172 | p_cb->u.open.path, |
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| 173 | p_cb->u.open.directory, |
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| 174 | p_cb->u.open.filename, |
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| 175 | p_cb->u.open.flags, |
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| 176 | p_cb->u.open.file_creation_param, |
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| 177 | p_cb->u.open.mode, |
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| 178 | p_cb->u.open.pdir, |
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| 179 | cred, |
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| 180 | &(p_cb->op_id), |
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| 181 | p_cb->hints, |
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| 182 | (void *)p_cb); |
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| 183 | break; |
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| 184 | } |
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| 185 | case PVFS_AIO_RENAME_OP: |
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| 186 | { |
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| 187 | rc = PVFS_iaio_rename(p_cb->u.rename.oldpdir, |
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| 188 | p_cb->u.rename.olddir, |
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| 189 | p_cb->u.rename.oldname, |
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| 190 | p_cb->u.rename.newpdir, |
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| 191 | p_cb->u.rename.newdir, |
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| 192 | p_cb->u.rename.newname, |
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| 193 | cred, |
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| 194 | &(p_cb->op_id), |
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| 195 | p_cb->hints, |
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| 196 | (void *)p_cb); |
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| 197 | break; |
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| 198 | } |
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| 199 | case PVFS_AIO_STAT_OP: |
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| 200 | { |
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| 201 | rc = PVFS_isys_getattr(p_cb->u.stat.pd->s->pvfs_ref, |
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| 202 | p_cb->u.stat.mask, |
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| 203 | cred, |
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| 204 | &(p_cb->u.stat.getattr_resp), |
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| 205 | &(p_cb->op_id), |
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| 206 | p_cb->hints, |
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| 207 | (void *)p_cb); |
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| 208 | break; |
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| 209 | } |
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| 210 | case PVFS_AIO_STAT64_OP: |
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| 211 | { |
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| 212 | rc = PVFS_isys_getattr(p_cb->u.stat.pd->s->pvfs_ref, |
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| 213 | p_cb->u.stat.mask, |
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| 214 | cred, |
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| 215 | &(p_cb->u.stat.getattr_resp), |
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| 216 | &(p_cb->op_id), |
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| 217 | p_cb->hints, |
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| 218 | (void *)p_cb); |
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| 219 | break; |
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| 220 | } |
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| 221 | default: |
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| 222 | { |
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| 223 | rc = -PVFS_EINVAL; |
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| 224 | break; |
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| 225 | } |
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| 226 | } |
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| 227 | |
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| 228 | if (rc < 0) |
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| 229 | { |
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| 230 | p_cb->error_code = rc; |
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| 231 | aiocommon_finish_op(p_cb); |
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| 232 | } |
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| 233 | else if(rc >= 0 && p_cb->op_id == -1) |
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| 234 | { |
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| 235 | p_cb->error_code = 0; |
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| 236 | aiocommon_finish_op(p_cb); |
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| 237 | } |
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| 238 | else |
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| 239 | { |
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| 240 | /* the operation deferred completion */ |
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| 241 | gossip_debug(GOSSIP_USRINT_DEBUG, "AIO CB %p, DEFERRED\n", p_cb); |
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| 242 | qlist_add_tail(&p_cb->link, aio_running_list); |
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| 243 | aio_running_ops[aio_num_ops_running++] = p_cb->op_id; |
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| 244 | } |
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| 245 | |
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| 246 | return; |
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| 247 | } |
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| 248 | |
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| 249 | static void aiocommon_finish_op(struct pvfs_aiocb *p_cb) |
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| 250 | { |
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| 251 | int status = 0; |
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| 252 | |
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| 253 | switch (p_cb->op_code) |
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| 254 | { |
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| 255 | case PVFS_AIO_IO_OP: |
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| 256 | { |
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| 257 | if (p_cb->error_code < 0) |
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| 258 | { |
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| 259 | *(p_cb->u.io.bcnt) = -1; |
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| 260 | } |
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| 261 | else |
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| 262 | { |
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| 263 | *(p_cb->u.io.bcnt) = p_cb->u.io.io_resp.total_completed; |
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| 264 | if (p_cb->u.io.advance_fp) |
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| 265 | { |
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| 266 | gen_mutex_lock(&(p_cb->u.io.pd->s->lock)); |
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| 267 | p_cb->u.io.pd->s->file_pointer += *(p_cb->u.io.bcnt); |
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| 268 | gen_mutex_unlock(&(p_cb->u.io.pd->s->lock)); |
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| 269 | } |
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| 270 | } |
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| 271 | free(p_cb->u.io.vector); |
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| 272 | PVFS_Request_free(&(p_cb->u.io.mem_req)); |
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| 273 | PVFS_Request_free(&(p_cb->u.io.file_req)); |
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| 274 | break; |
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| 275 | } |
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| 276 | case PVFS_AIO_IOV_OP: |
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| 277 | { |
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| 278 | if (p_cb->error_code < 0) |
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| 279 | { |
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| 280 | *(p_cb->u.io.bcnt) = -1; |
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| 281 | } |
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| 282 | else |
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| 283 | { |
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| 284 | *(p_cb->u.io.bcnt) = p_cb->u.io.io_resp.total_completed; |
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| 285 | gen_mutex_lock(&(p_cb->u.io.pd->s->lock)); |
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| 286 | p_cb->u.io.pd->s->file_pointer += *(p_cb->u.io.bcnt); |
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| 287 | gen_mutex_unlock(&(p_cb->u.io.pd->s->lock)); |
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| 288 | } |
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| 289 | PVFS_Request_free(&(p_cb->u.io.mem_req)); |
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| 290 | PVFS_Request_free(&(p_cb->u.io.file_req)); |
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| 291 | break; |
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| 292 | } |
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| 293 | case PVFS_AIO_OPEN_OP: |
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| 294 | { |
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| 295 | if (p_cb->error_code < 0) |
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| 296 | { |
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| 297 | *(p_cb->u.open.fd) = -1; |
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| 298 | } |
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| 299 | else |
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| 300 | { |
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| 301 | *(p_cb->u.open.fd) = p_cb->u.open.pd->fd; |
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| 302 | } |
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| 303 | break; |
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| 304 | } |
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| 305 | case PVFS_AIO_RENAME_OP: |
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| 306 | { |
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| 307 | free(p_cb->u.rename.olddir); |
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| 308 | free(p_cb->u.rename.oldname); |
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| 309 | free(p_cb->u.rename.newdir); |
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| 310 | free(p_cb->u.rename.newname); |
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| 311 | break; |
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| 312 | } |
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| 313 | case PVFS_AIO_STAT_OP: |
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| 314 | { |
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| 315 | PVFS_sys_attr attr = p_cb->u.stat.getattr_resp.attr; |
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| 316 | struct stat *buf = (struct stat *)p_cb->u.stat.buf; |
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| 317 | |
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| 318 | buf->st_dev = p_cb->u.stat.pd->s->pvfs_ref.fs_id; |
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| 319 | buf->st_ino = p_cb->u.stat.pd->s->pvfs_ref.handle; |
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| 320 | buf->st_mode = attr.perms; |
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| 321 | if (attr.objtype == PVFS_TYPE_METAFILE) |
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| 322 | { |
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| 323 | buf->st_mode |= S_IFREG; |
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| 324 | } |
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| 325 | if (attr.objtype == PVFS_TYPE_DIRECTORY) |
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| 326 | { |
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| 327 | buf->st_mode |= S_IFDIR; |
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| 328 | } |
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| 329 | if (attr.objtype == PVFS_TYPE_SYMLINK) |
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| 330 | { |
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| 331 | buf->st_mode |= S_IFLNK; |
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| 332 | } |
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| 333 | buf->st_nlink = 1; /* PVFS does not allow hard links */ |
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| 334 | buf->st_uid = attr.owner; |
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| 335 | buf->st_gid = attr.group; |
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| 336 | buf->st_rdev = 0; /* no dev special files */ |
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| 337 | buf->st_size = attr.size; |
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| 338 | buf->st_blksize = attr.blksize; |
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| 339 | if (attr.blksize) |
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| 340 | { |
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| 341 | buf->st_blocks = (attr.size + (attr.blksize - 1)) / attr.blksize; |
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| 342 | } |
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| 343 | buf->st_atime = attr.atime; |
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| 344 | buf->st_mtime = attr.mtime; |
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| 345 | buf->st_ctime = attr.ctime; |
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| 346 | break; |
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| 347 | } |
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| 348 | case PVFS_AIO_STAT64_OP: |
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| 349 | { |
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| 350 | PVFS_sys_attr attr = p_cb->u.stat.getattr_resp.attr; |
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| 351 | struct stat64 *buf = (struct stat64 *)p_cb->u.stat.buf; |
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| 352 | |
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| 353 | buf->st_dev = p_cb->u.stat.pd->s->pvfs_ref.fs_id; |
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| 354 | buf->st_ino = p_cb->u.stat.pd->s->pvfs_ref.handle; |
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| 355 | buf->st_mode = attr.perms; |
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| 356 | if (attr.objtype == PVFS_TYPE_METAFILE) |
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| 357 | { |
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| 358 | buf->st_mode |= S_IFREG; |
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| 359 | } |
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| 360 | if (attr.objtype == PVFS_TYPE_DIRECTORY) |
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| 361 | { |
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| 362 | buf->st_mode |= S_IFDIR; |
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| 363 | } |
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| 364 | if (attr.objtype == PVFS_TYPE_SYMLINK) |
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| 365 | { |
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| 366 | buf->st_mode |= S_IFLNK; |
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| 367 | } |
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| 368 | buf->st_nlink = 1; /* PVFS does not allow hard links */ |
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| 369 | buf->st_uid = attr.owner; |
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| 370 | buf->st_gid = attr.group; |
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| 371 | buf->st_rdev = 0; /* no dev special files */ |
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| 372 | buf->st_size = attr.size; |
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| 373 | buf->st_blksize = attr.blksize; |
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| 374 | if (attr.blksize) |
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| 375 | { |
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| 376 | buf->st_blocks = (attr.size + (attr.blksize - 1)) / attr.blksize; |
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| 377 | } |
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| 378 | buf->st_atime = attr.atime; |
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| 379 | buf->st_mtime = attr.mtime; |
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| 380 | buf->st_ctime = attr.ctime; |
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| 381 | break; |
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| 382 | } |
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| 383 | default: |
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| 384 | { |
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| 385 | break; |
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| 386 | } |
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| 387 | } |
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| 388 | |
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| 389 | /* set the status with the error number, if an error occured */ |
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| 390 | if (p_cb->error_code < 0) |
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| 391 | { |
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| 392 | if (IS_PVFS_NON_ERRNO_ERROR(-(p_cb->error_code))) |
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| 393 | { |
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| 394 | status = EIO; |
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| 395 | } |
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| 396 | else if (IS_PVFS_ERROR(-(p_cb->error_code))) |
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| 397 | { |
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| 398 | status = PINT_errno_mapping[(-(p_cb->error_code)) & 0x7f]; |
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| 399 | } |
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| 400 | } |
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| 401 | |
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| 402 | if (p_cb->call_back_fn) |
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| 403 | { |
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| 404 | (*p_cb->call_back_fn)(p_cb->call_back_dat, status); |
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| 405 | } |
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| 406 | |
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| 407 | return; |
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| 408 | } |
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| 409 | |
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| 410 | static void *aiocommon_progress(void *ptr) |
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| 411 | { |
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| 412 | int i, j; |
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| 413 | int ret = 0; |
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| 414 | int op_count = 0; |
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| 415 | PVFS_sys_op_id ret_op_ids[PVFS_AIO_MAX_RUNNING]; |
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| 416 | PVFS_sys_op_id temp_running_ops[PVFS_AIO_MAX_RUNNING] = {0}; |
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| 417 | int err_code_array[PVFS_AIO_MAX_RUNNING] = {0}; |
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| 418 | struct pvfs_aiocb *pcb_array[PVFS_AIO_MAX_RUNNING] = {NULL}; |
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| 419 | |
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| 420 | pvfs_sys_init(); |
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| 421 | gossip_debug(GOSSIP_USRINT_DEBUG, "AIO progress thread starting up\n"); |
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| 422 | |
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| 423 | /* progress thread */ |
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| 424 | while (1) |
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| 425 | { |
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| 426 | /* run any queued async io operations */ |
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| 427 | aiocommon_run_waiting_ops(); |
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| 428 | |
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| 429 | /* check to see if the progress thread should exit |
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| 430 | * (no more waiting or running operations) |
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| 431 | */ |
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| 432 | gen_mutex_lock(&aio_wait_list_mutex); |
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| 433 | if (!aio_num_ops_running && qlist_empty(aio_waiting_list)) |
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| 434 | { |
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| 435 | gossip_debug(GOSSIP_USRINT_DEBUG, |
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| 436 | "No AIO requests waiting, progress thread exiting\n"); |
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| 437 | aio_progress_status = PVFS_AIO_PROGRESS_IDLE; |
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| 438 | gen_mutex_unlock(&aio_wait_list_mutex); |
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| 439 | pthread_exit(NULL); |
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| 440 | } |
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| 441 | gen_mutex_unlock(&aio_wait_list_mutex); |
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| 442 | |
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| 443 | /* call PVFS_sys_testsome() to force progress on "running" operations |
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| 444 | * in the system. |
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| 445 | * NOTE: the op_ids of the completed ops will be in ret_op_ids, |
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| 446 | * the number of operations will be in op_count, the user pointers |
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| 447 | * are stored in pcb_array, and the error codes are stored in |
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| 448 | * err_code array. |
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| 449 | */ |
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| 450 | memcpy(ret_op_ids, aio_running_ops, |
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| 451 | (aio_num_ops_running * sizeof(PVFS_sys_op_id))); |
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| 452 | op_count = aio_num_ops_running; |
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| 453 | ret = PVFS_sys_testsome(ret_op_ids, |
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| 454 | &op_count, |
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| 455 | (void *)pcb_array, |
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| 456 | err_code_array, |
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| 457 | PVFS_AIO_DEFAULT_TIMEOUT_MS); |
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| 458 | |
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| 459 | /* for each op returned */ |
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| 460 | for (i = 0; i < op_count; i++) |
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| 461 | { |
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| 462 | /* ignore completed items that do not have a user pointer |
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| 463 | * (these are not aio control blocks) |
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| 464 | */ |
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| 465 | if (pcb_array[i] == NULL) continue; |
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| 466 | |
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| 467 | /* remove the cb from the running list */ |
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| 468 | qlist_del(&(pcb_array[i]->link)); |
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| 469 | |
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| 470 | pcb_array[i]->error_code = err_code_array[i]; |
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| 471 | aiocommon_finish_op(pcb_array[i]); |
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| 472 | |
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| 473 | /* update the number of running cbs, and exit the thread |
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| 474 | * if this number is 0 |
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| 475 | */ |
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| 476 | for (j = 0; j < aio_num_ops_running; j++) |
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| 477 | { |
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| 478 | if (aio_running_ops[j] == pcb_array[i]->op_id) |
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| 479 | { |
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| 480 | free(pcb_array[i]); |
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| 481 | /* remove it from the running op_ids array */ |
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| 482 | if (j > 0) |
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| 483 | memcpy(temp_running_ops, aio_running_ops, |
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| 484 | j * sizeof(PVFS_sys_op_id)); |
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| 485 | if (j < aio_num_ops_running - 1) |
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| 486 | memcpy(temp_running_ops + j, aio_running_ops + j + 1, |
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| 487 | (aio_num_ops_running - 1 - j) * sizeof(PVFS_sys_op_id)); |
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| 488 | memcpy(aio_running_ops, temp_running_ops, |
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| 489 | (PVFS_AIO_MAX_RUNNING * sizeof(PVFS_sys_op_id))); |
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| 490 | break; |
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| 491 | } |
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| 492 | } |
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| 493 | |
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| 494 | aio_num_ops_running--; |
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| 495 | } |
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| 496 | } |
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| 497 | } |
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| 498 | |
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| 499 | /* |
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| 500 | * Local variables: |
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| 501 | * c-indent-level: 4 |
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| 502 | * c-basic-offset: 4 |
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| 503 | * End: |
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| 504 | * |
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| 505 | * vim: ts=8 sts=4 sw=4 expandtab |
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| 506 | */ |
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