Mathieu Desnoyers [Wed, 1 Dec 2021 20:55:15 +0000 (15:55 -0500)] 
Warn on event registration/unregistration failure
Warn whenever event registration/unregistration fails, including when
synchonizing the event list.
Silently ignoring errors makes identification of those failures tricky.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I764455c8535ddb906325942e70aa689ca21c04bb
Mathieu Desnoyers [Sat, 6 Nov 2021 00:34:27 +0000 (20:34 -0400)]
Fix: kernels 3.0.x do not implement IS_ENABLED macro
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Id1059e57e4caacd6892b7d18032937650833a080
Mathieu Desnoyers [Fri, 5 Nov 2021 19:22:04 +0000 (15:22 -0400)]
Refactoring: lttng_event_enabler_create_tracepoint_events_if_missing: break loop if found
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I17aa51cbfc7e6d70837c16621897c3f928467a8a
Mathieu Desnoyers [Fri, 5 Nov 2021 19:20:46 +0000 (15:20 -0400)]
Refactoring: syscall: break loops when found
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: If30584dbedd47e891a823a180204aad7a7a6ddff
Mathieu Desnoyers [Fri, 5 Nov 2021 19:08:07 +0000 (15:08 -0400)]
Fix: _lttng_kernel_event_create never returns NULL
Handle _lttng_kernel_event_create return value as IS_ERR. It is never
NULL.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Iaae2b632b7a11084403740c1849fe101bdca2472
Mathieu Desnoyers [Fri, 5 Nov 2021 19:01:46 +0000 (15:01 -0400)]
Refactoring: move lttng_syscall_event_enabler_create_matching_events after probe registration
Considering that additional events can be added after the probe
registration, there is no point in registering the probes after the
event creation in the first instance.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Iba2ce2c1e718969f81e067e56dd106cd38a11447
Mathieu Desnoyers [Fri, 5 Nov 2021 19:01:14 +0000 (15:01 -0400)]
Refactoring: combine common code into lttng_syscall_event_enabler_create_matching_events
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I6618096c1e3e62e49b6896740ddbd00921840c97
Mathieu Desnoyers [Fri, 5 Nov 2021 18:58:40 +0000 (14:58 -0400)]
Refactoring: introduce lttng_syscall_event_enabler_create_matching_syscall_table_events
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I5aed44593f8610250cde523e447b74b73202c7cf
Mathieu Desnoyers [Fri, 5 Nov 2021 18:52:50 +0000 (14:52 -0400)]
Refactoring: remove unused argument from lttng_syscall_event_enabler_create_matching_events
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ib97a4d12f3e08ef1186d78af97b90ee48b8e05ed
Mathieu Desnoyers [Fri, 5 Nov 2021 18:50:03 +0000 (14:50 -0400)]
Refactoring: add/remove to/from dispatch list on enable/disable event for event recorder
Use same behavior for event recorder as for event notifier.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Idc27de3cb353fa44c3330bec3f33f670de0ced3d
Mathieu Desnoyers [Fri, 5 Nov 2021 18:40:18 +0000 (14:40 -0400)]
Refactoring: syscall tracing: config compat
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I023a7fc9e1c03dee3e3c9421b141b03d3b353777
Mathieu Desnoyers [Fri, 5 Nov 2021 18:32:54 +0000 (14:32 -0400)]
Fix: event notifier unknown syscall match only wildcard all
The unknown system call event should only be generated when matching a
wildcard *all*, otherwise when matching a system call by name we don't
expect to emit a notification for an unknown system call.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ia5b99ac3b15849859519b9484e400ce0de95faeb
Mathieu Desnoyers [Fri, 5 Nov 2021 16:41:38 +0000 (12:41 -0400)]
Refactoring: introduce create_unknown_syscall_event
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I70c34deb6d44fd2722fedb2a1e4065fe7468d12b
Mathieu Desnoyers [Fri, 5 Nov 2021 16:35:21 +0000 (12:35 -0400)]
Refactoring: introduce lttng_syscall_event_enabler_create_matching_events
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I98018adfbec95420122737b419fb0923c045efdd
Mathieu Desnoyers [Fri, 5 Nov 2021 16:33:37 +0000 (12:33 -0400)]
Fix: add unknown event to dispatch list
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I4dcef64b8b4ce4b13ee12cc33426a2734504db4e
Mathieu Desnoyers [Fri, 5 Nov 2021 16:31:34 +0000 (12:31 -0400)]
Fix: RCU-aware add event recorder to RCU dispatch list
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I0a9f95fb04d00ce8e38e047d193401ee1178eac5
Mathieu Desnoyers [Fri, 5 Nov 2021 16:20:56 +0000 (12:20 -0400)]
Refactoring: introduce lttng_syscall_event_enabler_create_event
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ifc230027ad2bfab1da580965ce8ecc9ff0150a78
Mathieu Desnoyers [Fri, 5 Nov 2021 14:56:30 +0000 (10:56 -0400)]
Refactoring: syscall: move matching event creation before tracepoint registration
There is no point in doing the event notifier creation after tracepoint
registration for syscall tracing. Move it prior to tracepoint
registration, similarly to event recorder.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I1ddbbb765445509f8a1f571788528ff0fce3dace
Mathieu Desnoyers [Fri, 5 Nov 2021 14:55:26 +0000 (10:55 -0400)]
syscalls: remove vmalloc sync mappings
The system call tables don't use vmalloc, so there is no point in
synchronizing the mappings.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I91c5d46c85d34ca02643e8732511f25e226b3e80
Mathieu Desnoyers [Fri, 5 Nov 2021 14:16:10 +0000 (10:16 -0400)]
Refactoring: introduce lttng_event_enabler_create_{syscall,tracepoint}_events_if_missing
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I6b0a21efcb39119cffbf5b2929c87fb27f455a45
Mathieu Desnoyers [Thu, 4 Nov 2021 21:10:21 +0000 (17:10 -0400)]
Refactoring: combine common code into _lttng_kernel_event_create
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I1409d6b1f5616b66edf8a461e2b8a4991d71ea4d
Mathieu Desnoyers [Thu, 4 Nov 2021 21:05:10 +0000 (17:05 -0400)]
Fix: clear error counter before adding to lists
Adding to lists should be the last thing in the create function,
otherwise errors on error counter clear may lead to use-after-free
due to presence of freed objects in linked lists.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ia6fb83cd053c2122939add6c330834199514b0e5
Mathieu Desnoyers [Thu, 4 Nov 2021 21:02:55 +0000 (17:02 -0400)]
Refactoring: introduce lttng_kernel_event_id_available
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ib95d7aeff5072075d232f89ca7a2f194876f2636
Mathieu Desnoyers [Thu, 4 Nov 2021 20:53:32 +0000 (16:53 -0400)]
Refactoring: remove unused event_recorder_return
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I9edef31a9355abe6cd9065689a74a4ad9ef7f3ad
Mathieu Desnoyers [Thu, 4 Nov 2021 20:51:34 +0000 (16:51 -0400)]
Refactoring: event create: introduce _lttng_event_recorder_metadata_statedump
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I03494b121ef036c240f95b6cd9cae37c434452e3
Mathieu Desnoyers [Thu, 4 Nov 2021 20:45:36 +0000 (16:45 -0400)]
Refactoring: event create: use lttng_get_event_list_head_from_enabler
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Id34660d2c6ccaaa27241757cf2177605b951df2a
Mathieu Desnoyers [Thu, 4 Nov 2021 20:42:44 +0000 (16:42 -0400)]
Refactoring: introduce lttng_kernel_event_notifier_clear_error_counter
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I702eefefd920aa2260873b4366cbdde65b522734
Mathieu Desnoyers [Thu, 4 Nov 2021 20:33:39 +0000 (16:33 -0400)]
Refactoring: introduce lttng_event_enabler_event_name_match_event
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ie7960f23e06a23d0db70e3c9586ec37739d5b4da
Mathieu Desnoyers [Thu, 4 Nov 2021 19:51:24 +0000 (15:51 -0400)]
Refactoring: event create: use parent structure
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I367e629a44157e232597cb6e39ab834d34258a14
Mathieu Desnoyers [Thu, 4 Nov 2021 19:44:48 +0000 (15:44 -0400)]
Refactoring: introduce lttng_kernel_event_alloc and lttng_kernel_event_free
Eliminate duplicated code.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I31a0d95bbbf782c20e9d63397d6f386ea6a5fc9a
Mathieu Desnoyers [Wed, 3 Nov 2021 20:21:43 +0000 (16:21 -0400)]
Refactoring: merge lttng_sync_event_list common code
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I49493dbe1ff0868b5ed576828d0efe7cf526a6c5
Mathieu Desnoyers [Wed, 3 Nov 2021 20:01:14 +0000 (16:01 -0400)]
Refactoring: move enablers list into common structure
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I1a7653df9ffff24e8568d5928c0cfb0e4ce4163b
Mathieu Desnoyers [Wed, 3 Nov 2021 19:42:01 +0000 (15:42 -0400)]
Refactoring: introduce lttng_event_sync_filter_state and lttng_event_sync_capture_state
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Id0fd7ef45fa30c20b76b87b68dec85b43bc4a8af
Mathieu Desnoyers [Wed, 3 Nov 2021 19:27:37 +0000 (15:27 -0400)]
Refactoring: combine common code into lttng_event_enabler_ref_events
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I1b2b0f9f8bcd5f143780354d412f6a072acb32b7
Mathieu Desnoyers [Wed, 3 Nov 2021 19:22:28 +0000 (15:22 -0400)]
Refactoring: introduce lttng_event_enabler_init_event_filter
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I9eff68c72e55cc8a92a821043e7428220c082f6e
Mathieu Desnoyers [Wed, 3 Nov 2021 19:19:26 +0000 (15:19 -0400)]
Refactoring: introduce lttng_event_enabler_init_event_capture
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: If558bcd7e2d0583cc5729b14fe3927399966830b
Mathieu Desnoyers [Wed, 3 Nov 2021 19:09:53 +0000 (15:09 -0400)]
Refactoring: combine common code into lttng_syscall_table_set_wildcard_all
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I84bda6aa93f5ca67e57dec95710c51f9464a11f4
Mathieu Desnoyers [Wed, 3 Nov 2021 18:59:51 +0000 (14:59 -0400)]
Refactoring: introduce list head from enabler getter
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ib97b1063ccc63d2c1dbeb6f4ea204667afce9a1a
Mathieu Desnoyers [Wed, 3 Nov 2021 18:55:36 +0000 (14:55 -0400)]
Refactoring: move event list node field to common structure
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I670545ecd1a8c4289e605b452488c17cc87fdfe2
Mathieu Desnoyers [Wed, 3 Nov 2021 16:20:32 +0000 (12:20 -0400)]
Refactoring: combine common code into lttng_create_event_if_missing
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I9df1460471e3d9ce51ae0cba1b607493b5964acc
Mathieu Desnoyers [Wed, 3 Nov 2021 16:17:10 +0000 (12:17 -0400)]
Refactoring: combine identical functions into lttng_create_tracepoint_event_if_missing
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ia923b97ae0e6a6f137fc51c9737f607cf45f96a8
Mathieu Desnoyers [Wed, 3 Nov 2021 16:14:09 +0000 (12:14 -0400)]
Refactoring/fix: desc match enabler: handle error internally
This actually ensures that callers don't mistakenly consider a negative
return value (error) as a match success.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I27fe42b4d1d018b9f69de62a0cd8b43c77a61fa5
Mathieu Desnoyers [Wed, 3 Nov 2021 16:08:22 +0000 (12:08 -0400)]
Refactoring: syscalls: use common match functions
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: If63da64ce79e75fe630ee032f587b41947e52d73
Mathieu Desnoyers [Wed, 3 Nov 2021 16:00:02 +0000 (12:00 -0400)]
Refactoring: combine create event common code
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: If87900e447a45de86ca0fc2a8b999c9639f84fef
Mathieu Desnoyers [Wed, 3 Nov 2021 15:25:59 +0000 (11:25 -0400)]
Refactoring: combine match functions for notifier and recorder
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ib9ee7d770328791d584b4f4e68b441999984de29
Mathieu Desnoyers [Tue, 2 Nov 2021 20:58:34 +0000 (16:58 -0400)]
Refactoring: introduce lttng_get_event_ht_from_enabler
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I82759291c892c0d0c8b7a7c6be4a32ec8fac0dcd
Mathieu Desnoyers [Tue, 2 Nov 2021 20:42:52 +0000 (16:42 -0400)]
Refactoring: combine hlist_node into common event structure
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I998d4ff59f51da8e1c6068f0a4dbb52a759e2c3f
Mathieu Desnoyers [Tue, 2 Nov 2021 19:04:08 +0000 (15:04 -0400)]
Refactoring: event notifier create: use enablers
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ib75cc8d0336f74af96455fd04c0a967db9013633
Mathieu Desnoyers [Tue, 2 Nov 2021 18:16:38 +0000 (14:16 -0400)]
Refactoring: combine event hash tables common code
Combine common code across notifier and recorder.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I1b781cf0481cc6d532622975376cc834d1b33603
Mathieu Desnoyers [Tue, 2 Nov 2021 18:11:40 +0000 (14:11 -0400)]
Refactoring: combine _lttng_event_unregister common code
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I89111affad4b35b68939c51f2ebd3aec6f4a881b
Mathieu Desnoyers [Tue, 2 Nov 2021 18:02:37 +0000 (14:02 -0400)]
Refactoring: combine register_event common code
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Icb8d0ba19c7070c86f25b9d54ec6034ffe74ba77
Mathieu Desnoyers [Tue, 2 Nov 2021 17:52:42 +0000 (13:52 -0400)]
Refactoring: combine lttng_create_syscall_event_if_missing common code
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I392c8dd39a956e2b46ce4dac76112249bccabf7b
Mathieu Desnoyers [Tue, 2 Nov 2021 17:50:40 +0000 (13:50 -0400)]
Refactoring: syscalls: move lttng_syscalls_create_matching_event_notifiers into registration
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I3c8e7c0f2ebf832e433b0c10b5073e7e469d8329
Mathieu Desnoyers [Tue, 2 Nov 2021 17:34:00 +0000 (13:34 -0400)]
Refactoring: Rename lttng_channel_syscall_mask to lttng_syscall_table_get_active_mask
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I4740cef4ec6465ba9cbd4d61b097263e01acf4b8
Mathieu Desnoyers [Tue, 2 Nov 2021 17:30:32 +0000 (13:30 -0400)]
Refactoring: kretprobes: use event common argument types
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I9c272f240b01cf070e45d7663c331e1cbce921b8
Mathieu Desnoyers [Tue, 2 Nov 2021 16:46:48 +0000 (12:46 -0400)]
Refactoring: kprobes: combine common code between recorder and notifier
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Iea2cf795c5409b0f5dadbadccb9cb2b4cd37acfc
Mathieu Desnoyers [Tue, 2 Nov 2021 16:38:41 +0000 (12:38 -0400)]
Refactoring: uprobes: combine common code between recorder and notifier
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ibbd7ddb064ca114e0c9dcf1b88c695167ee087aa
Mathieu Desnoyers [Tue, 2 Nov 2021 16:31:08 +0000 (12:31 -0400)]
Refactoring: syscalls: combine syscalls register event for notifier/recorder
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I907ac0397d0fdf421702d50ee382eb5e79827921
Mathieu Desnoyers [Tue, 2 Nov 2021 15:21:47 +0000 (11:21 -0400)]
Refactoring: syscall: combine syscall filter enable/disable recorder/notifier
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: If0e10ade6586073255817f5a8a96f73b5aa92f99
Mathieu Desnoyers [Mon, 1 Nov 2021 20:47:39 +0000 (16:47 -0400)]
Refactoring: rename lttng_syscalls_register_event to lttng_syscalls_register_event_recorder
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Icc5a6fcfdf951dd9b4661a4485c90ea7e84ad39a
Mathieu Desnoyers [Mon, 1 Nov 2021 20:39:22 +0000 (16:39 -0400)]
Cleanup: tracepoint probe register/unregister: use parent field
Use the parent field to match the type expected in the probe callback.
This works so far only because parent is the first field of the children
structures.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I05fb3cdc75c1c04abb352cdebdaa90f780d0c789
Mathieu Desnoyers [Mon, 1 Nov 2021 19:59:10 +0000 (15:59 -0400)]
Refactoring/fix: syscall table unregister/destroy
Combine syscall table unregister/destroy for both channel buffers and
notifier groups.
This fixes an issue within notifier groups where the syscall dispatch
tables are freed before waiting for an RCU grace period.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ia69f6be86da651022c5d5f4f6bce6e321156c070
Mathieu Desnoyers [Mon, 1 Nov 2021 19:33:28 +0000 (15:33 -0400)]
Refactoring: rename lttng_channel_create to lttng_channel_buffer_create
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I2d1ca065c5eb03adab3a982d1159c2e472bbc177
Mathieu Desnoyers [Mon, 1 Nov 2021 19:31:04 +0000 (15:31 -0400)]
Refactoring: channel enable/disable using common type
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ie86e23937d00a5d53aa3dbadb7666c176f3c0d52
Mathieu Desnoyers [Mon, 1 Nov 2021 19:23:20 +0000 (15:23 -0400)]
Cleanup: rename event register/unregister for event recorder
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ifb45adfed7b5c3acef3d5003b123c12b5f2d7a64
Mathieu Desnoyers [Mon, 1 Nov 2021 19:20:22 +0000 (15:20 -0400)]
Cleanup: rename lttng_syscalls_destroy_event to lttng_syscalls_destroy_channel
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Iabff0107d1280e2d88aa607b3220fa811f80c09c
Mathieu Desnoyers [Mon, 1 Nov 2021 19:14:44 +0000 (15:14 -0400)]
Cleanup: syscall filter enable/disable event
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I36f683e209a51ef0ca9e3a490f52f2c270f9b297
Mathieu Desnoyers [Mon, 1 Nov 2021 18:59:41 +0000 (14:59 -0400)]
Cleanup: notifier syscalls: Remove useless zero-init of zeroed memory
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I30f1c97f3d8ca9f6d800c0407f8ef96d3199cf06
Mathieu Desnoyers [Mon, 1 Nov 2021 18:47:24 +0000 (14:47 -0400)]
Refactoring: combine event enabler destroy for notifier and recorder
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I39ed3d9046604e5ab16f3e565ba72460348f54f5
Mathieu Desnoyers [Mon, 1 Nov 2021 18:31:51 +0000 (14:31 -0400)]
Refactoring: combine event notifier notifier and recorder enable/disable
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ia6cffc5bb36b91c5a5c289c1d1b13accb55dcce3
Mathieu Desnoyers [Mon, 1 Nov 2021 18:16:07 +0000 (14:16 -0400)]
Refactoring: combine filter bytecode attach functions
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Idd9f50a2e2fc38b16732ada4a33dba4ba14258d8
Mathieu Desnoyers [Mon, 1 Nov 2021 17:59:48 +0000 (13:59 -0400)]
Refactoring: rename lttng_event_enabler to lttng_event_recorder_enabler
To clarify that event recorder is distinct from event notifier, rename
"event enabler" to "event recorder enabler".
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I968d2f7a4efc43dfa7f4a8bb62cc4f963af83b30
Mathieu Desnoyers [Mon, 1 Nov 2021 17:43:58 +0000 (13:43 -0400)]
Refactoring: syscall tracing: combine common fields into struct lttng_kernel_syscall_table
There was a lot of code duplication between syscall tables associated
with ring buffers and those associated with event notifiers.
Move common fields into a struct lttng_kernel_syscall_table, and add a
syscall_table field in both struct lttng_event_notifier_group and
struct lttng_kernel_channel_common_private.
This allows removing both syscall_entry_event_notifier_probe and
syscall_exit_event_notifier_probe by using the syscall_entry_event_probe
and syscall_exit_event_probe instead for event notifiers as well.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ifb78755429ebf8699ac4bd3bb66af16bda1d86c4
Mathieu Desnoyers [Fri, 22 Oct 2021 20:16:26 +0000 (16:16 -0400)]
Rename event/notifier enabler base field to parent
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I06d707d26c4e582fd1b48de9df5d0e32ab950b22
Mathieu Desnoyers [Fri, 22 Oct 2021 19:56:00 +0000 (15:56 -0400)]
Rename struct lttng_enabler to struct lttng_event_enabler_common
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I7377b74b3ea59af391c77e22ad2d0c977aa09d6c
Mathieu Desnoyers [Fri, 22 Oct 2021 19:17:25 +0000 (15:17 -0400)]
Use event enabler for event recorder creation for all instrumentation types
Remove special-cases for uprobes, kprobes, kretprobes and use a
temporary event enabler to hold relevant information for event recorder
creation.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ib353a67d1554c345ba71d31c5632ded3b33b2a92
Daniel Gomez [Fri, 8 Oct 2021 17:38:02 +0000 (19:38 +0200)] 
fix: implicit-int error in EXPORT_SYMBOL_GPL
Add module header to fix error:
error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_GPL'
[-Werror=implicit-int]
Log:
/workdir/build/workspace/sources/lttng-modules/src/wrapper/random.c:54:1:
warning: data definition has no type or storage class
54 EXPORT_SYMBOL_GPL(wrapper_get_bootid);
^~~~~~~~~~~~~~~~~
/workdir/build/workspace/sources/lttng-modules/src/wrapper/random.c:54:1:
error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_GPL'
[-Werror=implicit-int]
/workdir/build/workspace/sources/lttng-modules/src/wrapper/random.c:54:1:
warning: parameter names (without types) in function declaration
cc1: some warnings being treated as errors
make[3]: ***
[/workdir/build/tmp/work-shared/qt5222/kernel-source/scripts/Makefile.build:271:
/workdir/build/workspace/sources/lttng-modules/src/wrapper/random.o]
Signed-off-by: Daniel Gomez <daniel@qtec.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: If1b96f6fcc19988b94dc09b12d071f2c61491b83
Michael Jeanson [Mon, 13 Sep 2021 18:16:22 +0000 (14:16 -0400)] 
fix: Revert "Makefile: Enable -Wimplicit-fallthrough for Clang" (v5.15)
Starting with v5.15, "-Wimplicit-fallthrough=5" was added to the build
flags which requires the use of "__attribute__((__fallthrough__))" to
annotate fallthrough case statements.
See upstream commit by the man himself:
commit
d936eb23874433caa3e3d841cfa16f5434b85dcf
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu Jul 15 18:05:31 2021 -0700
Revert "Makefile: Enable -Wimplicit-fallthrough for Clang"
This reverts commit
b7eb335e26a9c7f258c96b3962c283c379d3ede0.
It turns out that the problem with the clang -Wimplicit-fallthrough
warning is not about the kernel source code, but about clang itself, and
that the warning is unusable until clang fixes its broken ways.
In particular, when you enable this warning for clang, you not only get
warnings about implicit fallthroughs. You also get this:
warning: fallthrough annotation in unreachable code [-Wimplicit-fallthrough]
which is completely broken becasue it
(a) doesn't even tell you where the problem is (seriously: no line
numbers, no filename, no nothing).
(b) is fundamentally broken anyway, because there are perfectly valid
reasons to have a fallthrough statement even if it turns out that
it can perhaps not be reached.
In the kernel, an example of that second case is code in the scheduler:
switch (state) {
case cpuset:
if (IS_ENABLED(CONFIG_CPUSETS)) {
cpuset_cpus_allowed_fallback(p);
state = possible;
break;
}
fallthrough;
case possible:
where if CONFIG_CPUSETS is enabled you actually never hit the
fallthrough case at all. But that in no way makes the fallthrough
wrong.
So the warning is completely broken, and enabling it for clang is a very
bad idea.
In the meantime, we can keep the gcc option enabled, and make the gcc
build use
-Wimplicit-fallthrough=5
which means that we will at least continue to require a proper
fallthrough statement, and that gcc won't silently accept the magic
comment versions. Because gcc does this all correctly, and while the odd
"=5" part is kind of obscure, it's documented in [1]:
"-Wimplicit-fallthrough=5 doesn’t recognize any comments as
fallthrough comments, only attributes disable the warning"
so if clang ever fixes its bad behavior we can try enabling it there again.
Change-Id: Iea69849592fb69ac04fb9bb28efcd6b8dce8ba88
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Mon, 13 Sep 2021 16:00:38 +0000 (12:00 -0400)]
fix: cpu/hotplug: Remove deprecated CPU-hotplug functions. (v5.15)
The CPU-hotplug functions get|put_online_cpus() were deprecated in v4.13
and removed in v5.15.
See upstream commits :
commit
8c854303ce0e38e5bbedd725ff39da7e235865d8
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue Aug 3 16:16:21 2021 +0200
cpu/hotplug: Remove deprecated CPU-hotplug functions.
No users in tree use the deprecated CPU-hotplug functions anymore.
Remove them.
Introduced in v4.13 :
commit
8f553c498e1772cccb39a114da4a498d22992758
Author: Thomas Gleixner <tglx@linutronix.de>
Date: Wed May 24 10:15:12 2017 +0200
cpu/hotplug: Provide cpus_read|write_[un]lock()
The counting 'rwsem' hackery of get|put_online_cpus() is going to be
replaced by percpu rwsem.
Rename the functions to make it clear that it's locking and not some
refcount style interface. These new functions will be used for the
preparatory patches which make the code ready for the percpu rwsem
conversion.
Rename all instances in the cpu hotplug code while at it.
Change-Id: I5a37cf5afc075a402b7347989fac637dfa60a1ed
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Mon, 12 Jul 2021 18:51:20 +0000 (14:51 -0400)]
fix: sched: Change task_struct::state (v5.14)
See upstream commit:
commit
2f064a59a11ff9bc22e52e9678bc601404c7cb34
Author: Peter Zijlstra <peterz@infradead.org>
Date: Fri Jun 11 10:28:17 2021 +0200
sched: Change task_struct::state
Change the type and name of task_struct::state. Drop the volatile and
shrink it to an 'unsigned int'. Rename it in order to find all uses
such that we can use READ_ONCE/WRITE_ONCE as appropriate.
Change-Id: I3a379192d6b977753fe58d4f67833a78dd7a0a47
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Mon, 12 Jul 2021 19:00:26 +0000 (15:00 -0400)]
fix: btrfs: pass btrfs_inode to btrfs_writepage_endio_finish_ordered() (v5.14)
See upstream commit:
commit
38a39ac77e089515acbe85c6c70c3df1e728357d
Author: Qu Wenruo <wqu@suse.com>
Date: Thu Apr 8 20:32:27 2021 +0800
btrfs: pass btrfs_inode to btrfs_writepage_endio_finish_ordered()
There is a pretty bad abuse of btrfs_writepage_endio_finish_ordered() in
end_compressed_bio_write().
It passes compressed pages to btrfs_writepage_endio_finish_ordered(),
which is only supposed to accept inode pages.
Thankfully the important info here is the inode, so let's pass
btrfs_inode directly into btrfs_writepage_endio_finish_ordered(), and
make @page parameter optional.
By this, end_compressed_bio_write() can happily pass page=NULL while
still getting everything done properly.
Also, to cooperate with such modification, replace @page parameter for
trace_btrfs_writepage_end_io_hook() with btrfs_inode.
Although this removes page_index info, the existing start/len should be
enough for most usage.
Change-Id: If96e99c2d9533d96d9d1aa6460bb7fd3ac9ed7ab
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Tue, 18 May 2021 15:16:34 +0000 (11:16 -0400)]
fix: adjust ranges for RHEL 8.4
Change-Id: I9ac44467cca4850fb4051252937542d5a054ccc4
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Tue, 11 May 2021 19:29:23 +0000 (15:29 -0400)]
fix: adjust ranges for RHEL 8.2 and 8.3
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I0863ac030f9fdfeb0173b843e75396acda21f3b6
Michael Jeanson [Thu, 13 May 2021 14:30:24 +0000 (10:30 -0400)]
Disable x86 error code bitwise enum in default build
Only generate the bitwise enumerations when
CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM is enabled, so the default build
does not generate traces which lead to warnings when viewed with
babeltrace 1.x and babeltrace 2 with default options.
commit
8c7f2a9f2732b11f5cc9798cecb621420cc0e972
Author: Francis Deslauriers <francis.deslauriers@efficios.com>
Date: Fri Jun 5 18:42:54 2020 -0400
x86: add error code enum to pagefault tracepoints
Change-Id: I7901fad216b4774a9bbf3665568f357321805871
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Wed, 12 May 2021 18:20:44 +0000 (14:20 -0400)]
Disable mmap bitwise enum in default build
Only generate the bitwise enumerations when
CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM is enabled, so the default build
does not generate traces which lead to warnings when viewed with
babeltrace 1.x and babeltrace 2 with default options.
Original commit:
commit
3cf55950d0f6aa43eb5ad119bad1dbda69f75a54
Author: Francis Deslauriers <francis.deslauriers@efficios.com>
Date: Fri Jun 5 11:38:14 2020 -0400
syscalls: Make mmap()'s fields `prot` and `flags` enums
Change-Id: I033f42855c2967356b1e90cd89450eb5100a0f0b
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Tue, 11 May 2021 21:22:12 +0000 (17:22 -0400)]
Disable block rwbs bitwise enum in default build
Only generate the bitwise enumerations when
CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM is enabled, so the default build
does not generate traces which lead to warnings when viewed with
babeltrace 1.x and babeltrace 2 with default options.
Original commit:
commit
23634515e7271c8c8594ad87a6685232d4eff297
Author: Geneviève Bastien <gbastien@versatic.net>
Date: Tue Feb 11 11:20:27 2020 -0500
block: Make the rwbs field as a bit field enum
Change-Id: I6c285d1cbfbd88e151d4b0abb52ad9a650764ea2
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Tue, 11 May 2021 21:15:15 +0000 (17:15 -0400)]
Disable sched_switch bitwise enum in default build
Only generate the bitwise enumerations when
CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM is enabled, so the default build
does not generate traces which lead to warnings when viewed with
babeltrace 1.x and babeltrace 2 with default options.
Original commit:
commit
721caea47b6506f7ad9086c3e9801dc9dfe06b6a
Author: Geneviève Bastien <gbastien@versatic.net>
Date: Wed Feb 12 16:58:25 2020 -0500
sched: Make the sched_switch task state an enum
Change-Id: Ib19d06365fbed7daa9440d5dfff283c4f89db6ee
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Tue, 11 May 2021 21:09:07 +0000 (17:09 -0400)]
Disable open[at] bitwise enum in default build
Only generate the bitwise enumerations when
CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM is enabled, so the default build
does not generate traces which lead to warnings when viewed with
babeltrace 1.x and babeltrace 2 with default options.
Original commit:
commit
c8dfb72431505d5f01a6f090f3f7427d9ca6fe94
Author: Geneviève Bastien <gbastien@versatic.net>
Date: Wed Mar 11 12:33:04 2020 -0400
syscalls: Make the flags and mode fields of open[at] enumerations
Use the non-override system call tracing implementation when the enum is
not used.
Change-Id: I2dbebe56eaba6186843dab20264d3378962c7d30
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Tue, 11 May 2021 21:05:37 +0000 (17:05 -0400)]
Disable fcntl bitwise enum in default build
Only generate the bitwise enumerations when
CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM is enabled, so the default build
does not generate traces which lead to warnings when viewed with
babeltrace 1.x and babeltrace 2 with default options.
Original commit:
commit
c1c07d681a68ba37da066d6f0456129957073169
Author: Geneviève Bastien <gbastien+lttng@versatic.net>
Date: Wed Mar 11 12:38:51 2020 -0400
syscalls: Make the cmd field of fcntl an enum
Use the non-override system call tracing implementation when the enum is
not used.
Change-Id: I4c650d40a14b1c56ada0ed9aae1877364d0c4580
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Tue, 11 May 2021 20:16:18 +0000 (16:16 -0400)]
Disable clone bitwise enum in default build
Only generate the bitwise enumerations when
CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM is enabled, so the default build
does not generate traces which lead to warnings when viewed with
babeltrace 1.x and babeltrace 2 with default options.
Original commit:
commit
d775625e2ba4825b73b5897e7701ad6e2bdba115
Author: Geneviève Bastien <gbastien@versatic.net>
Date: Wed Apr 1 14:31:49 2020 -0400
syscalls: Make clone()'s `flags` field a 2 enum struct.
Change-Id: Ia67b5fc93b932b8b76330b4965753a43401c1514
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Wed, 12 May 2021 20:21:50 +0000 (16:21 -0400)]
Add experimental bitwise enum config option
Only generate the bitwise enumerations when
CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM is enabled, so the default build
does not generate traces which lead to warnings when viewed with
babeltrace 1.x and babeltrace 2 with default options.
Change-Id: Id45c7a78b280a7f35bbeafb80f2f6f5aa1ebbdc9
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Wed, 12 May 2021 20:13:01 +0000 (16:13 -0400)]
Add defaults to Kconfig options
Add defaults to the Kconfig options used when building in-tree that
match the default configuration when built out-of-tree.
Change-Id: I436251f1fb4c3e238a013d18d67932565b92ef45
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Thu, 13 May 2021 14:42:38 +0000 (10:42 -0400)]
Cleanup: remove unused EXTCFLAGS from Makefile
Change-Id: I36c4f6f403b03a1aa158863f393049efdc70af04
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Michael Jeanson [Wed, 12 May 2021 17:35:24 +0000 (13:35 -0400)]
Sync `show_inode_state()` macro with upstream stable kernels
The following commit was backported to multiple stable branches:
commit
5fcd57505c002efc5823a7355e21f48dd02d5a51
Author: Jan Kara <jack@suse.cz>
Date: Fri May 29 16:24:43 2020 +0200
writeback: Drop I_DIRTY_TIME_EXPIRE
The only use of I_DIRTY_TIME_EXPIRE is to detect in
__writeback_single_inode() that inode got there because flush worker
decided it's time to writeback the dirty inode time stamps (either
because we are syncing or because of age). However we can detect this
directly in __writeback_single_inode() and there's no need for the
strange propagation with I_DIRTY_TIME_EXPIRE flag.
Change-Id: I6e7c0ced13acd4fcd88bcd572d0ba1f9b254c58c
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Francis Deslauriers [Mon, 10 May 2021 17:41:48 +0000 (13:41 -0400)] 
Sync `show_inode_state()` macro with Ubuntu 4.15 kernel
The following commit changed the `show_inode_state()` macro which
triggered a warning on our CI build:
commit
63388062bea96e5cd8b8d7abf7b7142f8666ca1f
Author: Jan Kara <jack@suse.cz>
Date: Mon Jan 25 12:37:43 2021 -0800
writeback: Drop I_DIRTY_TIME_EXPIRE
Also, this commit adds a comment to clarify why we keep these
`#if/#elif` even though we don't use it the macro.
Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I2dd53a1a286ab8a431977bda6cde01f700f0c7d9
Michael Jeanson [Mon, 10 May 2021 15:39:24 +0000 (11:39 -0400)]
fix: block: remove disk_part_iter (v5.12)
In v5.12 a refactoring of the genhd code was started and the symbols
related to 'disk_part_iter' were unexported. In v5.13 they were
completely removed.
This patch replaces the short lived compat code that is specific to
v5.12 and replaces it with a generic internal implementation that
iterates directly on the 'disk->part_tbl' xarray which will be used
on v5.12 and up.
This seems like a better option than keeping the compat code that will
only work on v5.12 and make maintenance more complicated. The compat was
backported to the stable branches but isn't yet part of a point release
so can be safely replaced.
See the upstream commits:
commit
3212135a718b06be38811f2d9a320ae842e76409
Author: Christoph Hellwig <hch@lst.de>
Date: Tue Apr 6 08:23:02 2021 +0200
block: remove disk_part_iter
Just open code the xa_for_each in the remaining user.
commit
a33df75c6328bf40078b35f2040d8e54d574c357
Author: Christoph Hellwig <hch@lst.de>
Date: Sun Jan 24 11:02:41 2021 +0100
block: use an xarray for disk->part_tbl
Now that no fast path lookups in the partition table are left, there is
no point in micro-optimizing the data structure for it. Just use a bog
standard xarray.
Change-Id: If3497e087fadaa285e135f57aab7e6df157b06c6
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Mathieu Desnoyers [Tue, 11 May 2021 17:29:43 +0000 (13:29 -0400)]
Cleanup: lib ring buffer: rename pagecpy local variable
Rename pagecpy local variable to bytes_left_in_page, which has a clearer
semantic. Also remove the unused pagecpy parameter from slow paths which
was always 0.
Also add a missing __user annotation on @src of
the _lib_ring_buffer_copy_from_user_inatomic prototype.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I22a85cb8e94a65aaa80ca49951479243477ac600
Mathieu Desnoyers [Tue, 11 May 2021 17:19:33 +0000 (13:19 -0400)]
Cleanup: clarify strcpy/strcpy_from_user local variables
The variable name "bytes_left_in_page" is clearer than "pagecpy". Also
the only caller of slow paths always has a 0 pagecpy parameter, so
remove that parameter. Also use a "bool" for src_terminated (no
functional change).
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I38520b8cab54c31dbbb7b9296200b432afb3cee9
Mathieu Desnoyers [Fri, 7 May 2021 18:05:00 +0000 (14:05 -0400)]
Implement ring buffer Pascal string copy
Introduce a new lib_ring_buffer_pstrcpy() to handle copying into a ring
buffer Pascal String, use them for array and sequence of text.
Cover strings copied from both kernel and user-space.
This ensures that when copying from a string input to a ring buffer
utf8/ascii-encoded array or sequence, the source is not read beyond its
null terminating character.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I74996c8c8db6eec39b189693739aa2f980e29816
Mathieu Desnoyers [Fri, 7 May 2021 18:33:58 +0000 (14:33 -0400)]
Move alignment into event write callback
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I7563cdd07163fc22e2269627879a83e871c4eb01
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