/*
* submit a request to create a cache object for writing.
* The StoreEntry structure is sent as a hint to the filesystem
* to what will be stored in this object, to allow the filesystem
* to select different polices depending on object size or type.
*/
storeIOState *
storeCreate(StoreEntry * e, STIOCB * file_callback, STIOCB * close_callback, void *callback_data)
{
size_t objsize;
sdirno dirn;
SwapDir *SD;
storeIOState *sio;
store_io_stats.create.calls++;
/* This is just done for logging purposes */
objsize = objectLen(e);
if (objsize != -1)
objsize += e->mem_obj->swap_hdr_sz;
/*
* Pick the swapdir
* We assume that the header has been packed by now ..
*/
dirn = storeDirSelectSwapDir(e);
if (dirn == -1) {
debug(20, 2) ("storeCreate: no valid swapdirs for this object\n");
store_io_stats.create.select_fail++;
return NULL;
}
debug(20, 2) ("storeCreate: Selected dir '%d' for obj size '%ld'\n", dirn, (long int) objsize);
SD = &Config.cacheSwap.swapDirs[dirn];
/* Now that we have a fs to use, call its storeCreate function */
sio = SD->obj.create(SD, e, file_callback, close_callback, callback_data);
if (NULL == sio)
store_io_stats.create.create_fail++;
else
store_io_stats.create.success++;
return sio;
}
int
storeDirMapAllocate(void)
{
int dirn = storeDirSelectSwapDir();
SwapDir *SD = &Config.cacheSwap.swapDirs[dirn];
int filn = file_map_allocate(SD->map, SD->suggest);
SD->suggest = filn + 1;
return (dirn << SWAP_DIR_SHIFT) | (filn & SWAP_FILE_MASK);
}
