fs: improve ioctl implementation #235
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Exports IOC_DIR_* constants to use for the direction parameter instead of plain integer values. The constants are based on the target's _IOC_* definitions. Signed-off-by: Jonas Jelonek <[email protected]>
Allocate memory for 'uc_string_t' with the proper size upfront and use it's internal buffer as ioctl buffer. This avoids using 'ucv_string_new_length' and thus allocating memory a second time. For ioctl read-write, this completely reuses the 'uc_string_t', also eliminating the 'ucv_string_new_length' call. Signed-off-by: Jonas Jelonek <[email protected]>
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