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| Rev | Author | Line No. | Line |
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| 352 | giacomo | 1 | /* |
| 2 | * Project: S.Ha.R.K. |
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| 3 | * |
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| 4 | * Coordinators: |
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| 5 | * Giorgio Buttazzo <giorgio@sssup.it> |
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| 6 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 7 | * |
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| 8 | * Authors : |
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| 9 | * Massimiliano Giorgi <massy@gandalf.sssup.it> |
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| 10 | * (see the web pages for full authors list) |
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| 11 | * |
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| 12 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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| 13 | * |
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| 14 | * http://www.sssup.it |
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| 15 | * http://retis.sssup.it |
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| 16 | * http://shark.sssup.it |
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| 17 | */ |
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| 18 | |||
| 19 | #include <ll/sys/types.h> |
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| 20 | #include <ll/stdlib.h> |
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| 21 | |||
| 22 | #include <kernel/func.h> |
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| 23 | #include <kernel/mem.h> |
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| 24 | #include <kernel/log.h> |
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| 25 | |||
| 26 | #include <types.h> |
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| 27 | #include <trace.h> |
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| 28 | #include <queues.h> |
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| 29 | |||
| 30 | #include <ll/i386/x-dos.h> |
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| 31 | |||
| 32 | /* this file implement a fixed queue, that is simply an array that |
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| 33 | is filled with the events until it is full. After that, all the other |
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| 34 | events are discarded. It uses the DOSFS Filesystem to write all the data |
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| 35 | |||
| 36 | This file is derived from the trcfixed.c file; I used a different file |
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| 37 | because including trcfixed.c in the executable would have implied the |
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| 38 | linking of all the filesystem... |
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| 39 | */ |
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| 40 | |||
| 41 | |||
| 42 | |||
| 43 | |||
| 44 | typedef struct TAGfixed_queue_t { |
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| 45 | int size; |
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| 46 | int index; |
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| 47 | char *filename; |
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| 48 | int uniq; |
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| 49 | |||
| 50 | trc_event_t table[0]; |
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| 51 | /* Yes, 0!... the elements are allocated |
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| 52 | in a dirty way into the kern_alloc into fixed_create */ |
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| 53 | } dosfs_fixed_queue_t; |
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| 54 | |||
| 55 | /* This function simply return an event to fill (only if the fixed table |
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| 56 | is not yet full) */ |
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| 57 | static trc_event_t *dosfs_fixed_get(dosfs_fixed_queue_t *queue) |
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| 58 | { |
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| 59 | if (queue->index>=queue->size) return NULL; |
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| 60 | return &queue->table[queue->index++]; |
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| 61 | } |
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| 62 | |||
| 63 | /* since get returns the correct event address, |
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| 64 | the post function does nothing... */ |
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| 65 | static int dosfs_fixed_post(dosfs_fixed_queue_t *queue) |
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| 66 | { |
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| 67 | return 0; |
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| 68 | } |
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| 69 | |||
| 70 | static TRC_FIXED_PARMS defaultargs; |
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| 71 | static int once=0; |
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| 72 | |||
| 73 | static void dosfs_fixed_flush(void *arg); |
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| 74 | |||
| 75 | static int dosfs_fixed_create(trc_queue_t *queue, TRC_FIXED_PARMS *args) |
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| 76 | { |
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| 77 | dosfs_fixed_queue_t *ptr; |
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| 78 | |||
| 79 | /* initialize the default arguments for the fixed queue */ |
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| 80 | if (!once) { |
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| 81 | /* well... this func is called when the system is not running! */ |
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| 82 | once=1; |
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| 83 | trc_fixed_default_parms(defaultargs); |
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| 84 | } |
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| 85 | if (args==NULL) args=&defaultargs; |
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| 86 | |||
| 87 | /* allocate the fixed queue data structure plus the array of events */ |
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| 88 | ptr=(dosfs_fixed_queue_t*)kern_alloc(sizeof(dosfs_fixed_queue_t)+ |
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| 89 | sizeof(trc_event_t)*(args->size+1)); |
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| 90 | if (ptr==NULL) return -1; |
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| 91 | |||
| 92 | /* set the current queue pointers and data */ |
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| 93 | queue->get=(trc_event_t*(*)(void*))dosfs_fixed_get; |
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| 94 | queue->post=(int(*)(void*))dosfs_fixed_post; |
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| 95 | queue->data=ptr; |
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| 96 | |||
| 97 | ptr->size=args->size; |
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| 98 | ptr->index=0; |
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| 99 | ptr->filename=args->filename; |
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| 100 | |||
| 101 | /* prepare for shutdown ;-) */ |
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| 102 | sys_atrunlevel(dosfs_fixed_flush, (void *)ptr, RUNLEVEL_AFTER_EXIT); |
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| 103 | |||
| 104 | return 0; |
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| 105 | } |
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| 106 | |||
| 107 | static void dosfs_fixed_flush(void *arg) |
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| 108 | { |
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| 109 | DOS_FILE *f; |
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| 110 | dosfs_fixed_queue_t *queue = (dosfs_fixed_queue_t *)arg; |
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| 111 | |||
| 112 | char pathname[100]; /* it should be PATH_MAX, but we do not use the |
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| 113 | filesystem, so the symbol is not defined */ |
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| 114 | |||
| 115 | if (queue->filename==NULL) trc_create_name("fix",queue->uniq,pathname); |
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| 116 | else trc_create_name(queue->filename,0,pathname); |
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| 117 | |||
| 118 | printk(KERN_DEBUG "tracer flush index= %d pathname=%s\n", |
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| 119 | queue->index, pathname); |
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| 120 | |||
| 121 | f = DOS_fopen(pathname,"w"); |
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| 122 | |||
| 123 | DOS_fwrite(queue->table,1,queue->index*sizeof(trc_event_t),f); |
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| 124 | |||
| 125 | DOS_fclose(f); |
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| 126 | |||
| 127 | } |
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| 128 | |||
| 129 | static int dosfs_fixed_activate(dosfs_fixed_queue_t *queue, int uniq) |
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| 130 | { |
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| 131 | queue->uniq=uniq; |
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| 132 | return 0; |
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| 133 | } |
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| 134 | |||
| 135 | static int dosfs_fixed_terminate(dosfs_fixed_queue_t *queue) |
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| 136 | { |
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| 137 | return 0; |
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| 138 | } |
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| 139 | |||
| 140 | int trc_register_dosfs_fixed_queue(void) |
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| 141 | { |
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| 142 | int res; |
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| 143 | |||
| 144 | res=trc_register_queuetype(TRC_DOSFS_FIXED_QUEUE, |
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| 145 | (int(*)(trc_queue_t*,void*))dosfs_fixed_create, |
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| 146 | (int(*)(void*,int))dosfs_fixed_activate, |
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| 147 | (int(*)(void*))dosfs_fixed_terminate |
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| 148 | ); |
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| 149 | |||
| 150 | if (res!=0) printk(KERN_WARNING "can't register tracer DOSFS fixed queue"); |
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| 151 | return res; |
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| 152 | } |