Since there isn't a fixed array to hold all the channels, and also limit
the total number of channels that can be created, we'll add a module
parameter to allow the system administrator to specify the maximum
number of pseudo channels. This is to prevent a potentially
non-privledged process from consuming too much CPU (since all pseudos
are checked each "tick" for conferencing) and kernel memory.
By default the number of pseudo channels is limited to 512. Change the
default limit with:
]# modprobe dahdi max_pseudo_channels=<new limit>
or at runtime with:
]# echo <new limit> > /sys/module/dahdi/parameters/max_psuedo_channels
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9610 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Remove the remaining locations the 'chans' array was referenced but keep
the observable behavior the same. Namely, channels are numbered in
registration order. Only now it's possible to renumber channels easily
since their number is not also their implied location in the 'chans'
array.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9609 a0bf4364-ded3-4de4-8d8a-66a801d63aff
In dahdi_chec_conf, dahdi_chan_unreg, and dahdi_ioctl_confdiag maxchans
and DAHDI_MAX_CHANNELS was used to scan through all the channels. Since
the channels are stored on the list of spans and list of pseudo
channels, we can directly iterate through those lists. This also paves
the way for removing the arbitrary limit on the number of channels in
the driver.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9608 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Part of getting rid of global chans array. We need to search the list
of spans and the list of pseudo channels. While this is slower than a
direct index into a 'chans' array, the places where this function is
called are not in the 'hot' path but instead part of channel
configuration and conferencing setup.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9607 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Streamlines the function a bit by grouping the three conditions that
would cause the channel receive to be completely skipped.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9606 a0bf4364-ded3-4de4-8d8a-66a801d63aff
IMO this improves readability of dahdi_receive and dahdi_transmit, and
the compiler can decide if it is better to inline this in with the
caller or break it out into a separate function.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9605 a0bf4364-ded3-4de4-8d8a-66a801d63aff
When we're in monitor mode, we can save a pointer to the channel we are
monitoring directly instead of dereferencing the 'chans' array each
time.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9604 a0bf4364-ded3-4de4-8d8a-66a801d63aff
This both removes the need to reference the 'chans'
__dahdi_process_putaudio_chunk and __dahdi_process_getaudio_chunk, and
allows the dahdi_receive / dahdi_transmit logic to be streamlined. DACS
channels can no longer be echocanceled if crossed. However, if a
channel was DACSed with dahi_cfg it couldn't have been echocanceled
anyway since the echo cancelers are disabled on the channel by default.
This change was originally contained in a patch kpfleming had floating
around. I split it up and merged it.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Kevin P. Fleming <kpfleming@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9603 a0bf4364-ded3-4de4-8d8a-66a801d63aff
There is no need to check the flag on the master channel when processing all
the slave channels. Originally part of a patch kpfleming had floating around.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Kevin P. Fleming <kpfleming@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9602 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Eliminates the need to look for the channel number twice.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9599 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Spans are no longer added to a static array, but they are chained
together in a list. DAHDI_MAX_SPANS, while no longer used in the
kernel, is still in include/dahdi/user.h since dahdi tools is currently
using it.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9598 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Clarify that these definitions are not / no longer used outside
dahdi-base.c.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9597 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Mainly I wanted to document that the global_dialparams is protected by
the BKL so that it can be closely checked when lock_kernel is removed
from DAHDI.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9596 a0bf4364-ded3-4de4-8d8a-66a801d63aff
This change primarily is a memory reduction. Most users only ever have
a single tone zone loaded so we can save some mostly unused pointers by
using a list instead of an array. Since we also have a pointer to the
dahdi_zone in struct dahdi_chan, we also don't need to store the integer
that is an index into that array. This saves 4 bytes for every channel
allocated in the system. Finally, we don't need a separate default_zone
member since we're on a list, we can define the first element on
the list to always be the default zone.
Additionally, all reference counted structures in the drivers should
standardize on kref as much as possible for simplicity.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9594 a0bf4364-ded3-4de4-8d8a-66a801d63aff
kasprintf will be used in upcoming changes and it's not supported on
RHEL4 kernels. This change essentially backports it.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9593 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Might help when someone wonders why they are now getting errors about
"lock_kernel" being undefined.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9592 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Not only should you not reach that line, it's impossible for you to
reach that line.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9591 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Do not allocate the structure with GFP_KERNEL under the lock in
dahdi_echocan_factory_register and closes a leak in
dahdi_echocan_factory_unregister.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9590 a0bf4364-ded3-4de4-8d8a-66a801d63aff
rwlocks are slowly being deprecated because they typically do not
provide the performance increase expected. Most of the
ecfactory_list_lock acquiring is during setup and not in the hot path
anyway, so we can just use the simpler spinlock semantics without the
overhead of a semaphore or mutex.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9589 a0bf4364-ded3-4de4-8d8a-66a801d63aff
rwlocks are deprecated and there aren't that many places where read_lock
was called on the lock anyway.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9588 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Since the return value is not defined/used just return void.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
Acked-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9587 a0bf4364-ded3-4de4-8d8a-66a801d63aff
This is a trivial cleanup to primarily to remove the #ifdef test out of
process_masterspan.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9586 a0bf4364-ded3-4de4-8d8a-66a801d63aff
There is already a safe string copying function in all the kernels DAHDI
currently supports.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9585 a0bf4364-ded3-4de4-8d8a-66a801d63aff
2.6.25 added the DEFINE_PCI_DEVICE_TABLE macro to make sure that the
pci_device_id tables are put into the correct section in the binary.
Convert all the places where the tables were defined to use them.
This is linux-2.6 commit where the change went in along with the
rationale: 90a1ba0c5e39eeea278f263c28ae02166c5911c8
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9584 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Normally, spans are accessed via channels, which increment the reference
count on the supporting module as part of the open call. When operating
on spans by number we are susceptible to a module_unload while we are
accessing the span.
Renames find_span to span_find_and_get to indicate that we're both
finding the span by number and increasing the reference count on the
span. Spans themselves don't currently have reference counts, but we
can increment the reference count on the module that owns the spans.
This will prevent the module that has the span from unloading in the
middle of a span_config call, which in the case of the wcte12xp can take
awhile since the VPM firmware is loading.
Hopefully in the near future the spans themselves will be reference
counted directly.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9583 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Some spans, specifically dynamic local spans, should never be the timing
master since they are dependent on some other timing source driving
them.
The bit in 'struct dahdi_span' is named cannot provide timing so that by
default the other drivers will set it to 0.
This is loosely related to issue #13205 but doesn't address any of the
other elements of that issue about how to allow the user to configure
what the master span order of succession is.
(issue #13205)
Reported by: biohumanoid
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9581 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Also makes it safe to unregister a dynamic driver when there aren't any
open channels on the dynamic spans.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9580 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Mutexes were added in 2.6.16. This will allow future changes to use the
mutex API without breaking on pre 2.6.16 kernels.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9579 a0bf4364-ded3-4de4-8d8a-66a801d63aff
This allows the pvt member to be set under lock without holding the lock
through the call to create destroy.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9578 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Running in tasklets does not work well when dahdi doesn't have a span that is
acting as the master. In this case, process_masterspan is being called in
system timer that may not be running at 1ms intervals. The end result is that
the dynamic_run function isn't called for every chunk processed, and there is
data loss.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9577 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Dynamic spans that are unable to provide their own timing, like dahdi
local spans, typically derived their timing source from
dahdi_dynamic_ioctl(0,0) call in process_masterspan.
This change uses the sync_tick member of dahdi_span_ops instead so that
dynamic operations do not happen on a span until it is fully registered.
Also removes the check for dahdi_dynamic_ioctl in process masterspan for
those users that never load a dynamic span.
This was originally suggested in a comment on:
(issue #13205)
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9576 a0bf4364-ded3-4de4-8d8a-66a801d63aff
2.6.9 is the earliest kernel version currently supported by DAHDI.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9575 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Move the try_module_get/module_put calls from the various dynamic
drivers into the "core" dahdi_dynamic.c file itself. This way, a
reference count can always be held while calling through the function
pointers. This is enabled by adding an .owner field to 'struct
dahdi_dynamic_driver'.
Dynamic spans are also unique in dahdi in that they require a "dahdi_cfg
-s" to stop them and release the references on the modules. This is
counterintuitive. This change makes sure they are reference counted just
like other spans and on driver unload, if there aren't any open handles
from userspace, they will take care of unwinding themselves.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9573 a0bf4364-ded3-4de4-8d8a-66a801d63aff
dahdi_dynamic can be converted to use kernel idiomatic reference
counting since DAHDI only supports 2.6.9+ kernels now.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9571 a0bf4364-ded3-4de4-8d8a-66a801d63aff
The return value from the transmit callback function was not used
anywhere, and is now removed.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9570 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Replaces all the 'z' references to 'd' as appropriate and cleans up any
formatting problems that popped up as a result. The intent here is to
reduce confusion in the future as someone may wonder what the 'Z's refer
to.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9567 a0bf4364-ded3-4de4-8d8a-66a801d63aff
It's possible for dahdi_dynamic_loc spans to be "peered" before the
dahdi_span is fully register. Do not call dahdi_dynamic_receive on any
peers before they are fully registered.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9566 a0bf4364-ded3-4de4-8d8a-66a801d63aff
This is a trivial formatting change in order to not introduce any warnings.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9565 a0bf4364-ded3-4de4-8d8a-66a801d63aff
The memory saved by using a singly linked list does not, in my opinion,
outweigh the benefit of using the standard kernel macros.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9564 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Hopefully will eliminate any questions about what the 'z's are supposed
to represent.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9562 a0bf4364-ded3-4de4-8d8a-66a801d63aff
