perf trace: Beautify mount's first pathname arg
The pathname beautifiers so far support just one augmented pathname per syscall, so do it just for mount's first arg, later this will get fixed. With: # perf probe -l probe:vfs_getname (on getname_flags:73@acme/git/linux/fs/namei.c with pathname) # Later this will get added to augmented_syscalls.c (eBPF): In one xterm: # perf trace -e mount,umount 2687.331 ( 3.544 ms): mount/8892 mount(dev_name: /mnt, dir_name: 0x561f9ac184a0, type: 0x561f9ac1b170, flags: BIND) = 0 3912.126 ( 8.807 ms): umount/8895 umount2(name: /mnt) = 0 ^C# In the other: $ sudo mount --bind /proc /mnt $ sudo umount /mnt Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Benjamin Peterson <benjamin@python.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-qsvhrm2es635cl4zicqjeth2@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -727,7 +727,8 @@ static struct syscall_fmt {
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[2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
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[3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, }, },
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{ .name = "mount",
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.arg = { [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
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.arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
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[3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
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.mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
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{ .name = "mprotect",
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.arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
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