When seccomp policy is applied to filter ioctl syscall with
SNDRV_CTL_IOCTL_TLV_COMMAND, SNDRV_CTL_IOCTL_TLV_READ and
SNDRV_CTL_IOCTL_TLV_WRITE in whiltelist, alsa-lib still breaks
in at snd_ctl_hw_elem_tlv().
The problem behind is because ioctl() takes unsigned long cmd
argument, and the signed bit of local int variable could cause
0xff bytes appended after casted to unsigned long.
In kernel, seccomp data struct takes 64 bits argument to check
against seccomp rules, these unexpected 0xff bytes could make
the rule check fail.
Fix the problem by passing unsigned int to ioctl.
Signed-off-by: Hsin-Yu Chao <hychao@chromium.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
A series of SNDRV_CTL_TLVO_XXX macro was introduced for position offset
of TLV data. This commit applies a code optimization.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Like pcm and rawmidi, each object parser needs to accept the hint
component. Now a new local function _snd_conf_generic_id() was
introduced to replace each call of "comment" and "type" field checks.
Also, the two existing identical functions for pcm and rawmidi are
removed and the new function is used commonly.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Add --with-max-cards option to specify the max number of cards in
configure script, when the support for more than 32 cards is
required.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Instead of keeping modified asound.h and asequencer.h, copy the files
in the kernel include/uapi/sound as is, and give some renames for
avoiding conflicts with alsa-lib's definitions.
Some structs, unions and typedefs in asound.h and asequencer.h are
once renamed in local.h before inclusion, then renamed back again.
A bonus by this action is that some local codes don't have to refer to
sndrv_xxx any longer. However, some codes like src/seq/seq.c need
explicit cast because of unavoidable conflicts of struct types.
Another significant change is that now snd_pcm_sw_params.period_event
field is removed. Instead, try to access the last reserved field
internally.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Handling of user control elements was implemented for all types except
BYTES and ENUMERATED. Enumerated user controls will be needed for the
device-specific mixers of upcoming FireWire drivers.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Since they are never changed it does not make sense to have them in
the writeable .data section, just make sure to add const to the ops
member in the structure definitions so that there are no extra
warnings added.
Signed-off-by: Diego E. 'Flameeyes' Pettenò <flameeyes@gmail.com>
Add configuration options to change the default device path from the
default /dev/snd. This is useful for embedded systems that do not want
subdirectories in /dev.
- changed snd_config_get_id function to follow semantic of other get functions
- added snd_config_test_id
- added runtime pointer type (not persistent)
- added snd_config_make_pointer, snd_config_set_pointer, snd_config_get_pointer
- added type/contents checking for callback functions
- changed 'void *private_data' to 'snd_config_t *private_data'
- renamed card_strtype functions to card_driver
Control:
- fixed passing parameters to snd_ctl_async
Async handlers:
- added public snd_async_handler_get_signo function
Documentation:
- moved all documentation to source files
