From: Andrii Nakryiko Date: Fri, 8 Oct 2021 20:22:57 +0000 (-0700) Subject: Merge branch 'add support for writable bare tracepoint' X-Git-Tag: v6.6.17~8953^2~2^2~63 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a1852ce0e54251c977e92ca55476ef37bd08fb0e;p=platform%2Fkernel%2Flinux-rpi.git Merge branch 'add support for writable bare tracepoint' Hou Tao says: ==================== From: Hou Tao Hi, The patchset series supports writable context for bare tracepoint. The main idea comes from patchset "writable contexts for bpf raw tracepoints" [1], but it only supports normal tracepoint with associated trace event under tracefs. Now we have one use case in which we add bare tracepoint in VFS layer, and update file::f_mode for specific files. The reason using bare tracepoint is that it doesn't form a ABI and we can change it freely. So add support for it in BPF. Comments are always welcome. [1]: https://lore.kernel.org/lkml/20190426184951.21812-1-mmullins@fb.com Change log: v5: * rebased on bpf-next * patch 1: add Acked-by tag * patch 2: handle invalid section name, make prefixes array being const v4: https://www.spinics.net/lists/bpf/msg47021.html * rebased on bpf-next * update patch 2 to add support for writable raw tracepoint attachment in attach_raw_tp(). * update patch 3 to add Acked-by tag v3: https://www.spinics.net/lists/bpf/msg46824.html * use raw_tp.w instead of raw_tp_writable as section name of writable tp * use ASSERT_XXX() instead of CHECK() * define a common macro for "/sys/kernel/bpf_testmod" v2: https://www.spinics.net/lists/bpf/msg46356.html * rebase on bpf-next tree * address comments from Yonghong Song * rename bpf_testmode_test_writable_ctx::ret as early_ret to reflect its purpose better. v1: https://www.spinics.net/lists/bpf/msg46221.html ==================== Signed-off-by: Andrii Nakryiko --- a1852ce0e54251c977e92ca55476ef37bd08fb0e