| 36,7 → 36,6 |
|---|
| |
| #include "libfs.h" |
| #include "../../srv/vfs/vfs.h" |
| #include "../../srv/rd/rd.h" |
| #include <errno.h> |
| #include <async.h> |
| #include <ipc/ipc.h> |
| 331,62 → 330,5 |
|---|
| ops->node_put(tmp); |
| } |
| |
| /** Read data from a block device. |
| * |
| * @param phone Phone to be used to communicate with the device. |
| * @param buffer Communication buffer shared with the device. |
| * @param bufpos Pointer to the first unread valid offset within the |
| * communication buffer. |
| * @param buflen Pointer to the number of unread bytes that are ready in |
| * the communication buffer. |
| * @param pos Device position to be read. |
| * @param dst Destination buffer. |
| * @param size Size of the destination buffer. |
| * @param block_size Block size to be used for the transfer. |
| * |
| * @return True on success, false on failure. |
| */ |
| bool libfs_blockread(int phone, void *buffer, off_t *bufpos, size_t *buflen, |
| off_t *pos, void *dst, size_t size, size_t block_size) |
| { |
| off_t offset = 0; |
| size_t left = size; |
| |
| while (left > 0) { |
| size_t rd; |
| |
| if (*bufpos + left < *buflen) |
| rd = left; |
| else |
| rd = *buflen - *bufpos; |
| |
| if (rd > 0) { |
| /* |
| * Copy the contents of the communication buffer to the |
| * destination buffer. |
| */ |
| memcpy(dst + offset, buffer + *bufpos, rd); |
| offset += rd; |
| *bufpos += rd; |
| *pos += rd; |
| left -= rd; |
| } |
| |
| if (*bufpos == *buflen) { |
| /* Refill the communication buffer with a new block. */ |
| ipcarg_t retval; |
| int rc = async_req_2_1(phone, RD_READ_BLOCK, |
| *pos / block_size, block_size, &retval); |
| if ((rc != EOK) || (retval != EOK)) |
| return false; |
| |
| *bufpos = 0; |
| *buflen = block_size; |
| } |
| } |
| |
| return true; |
| } |
| |
| /** @} |
| */ |