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    Subject[PATCH 15/29] perf trace beauty ioctl: Beautify USBDEVFS_ commands
    Date
    From: Arnaldo Carvalho de Melo <acme@redhat.com>

    For instance, while debugging the 'galileo' python utility to
    synchronize fitbit trackers:

    # perf trace -e ioctl ./run --force
    ioctl(0</dev/pts/8>, TCSETS, 0x7ffe28666420) = 0
    ioctl(0</dev/pts/8>, TCSETS, 0x7ffe28666290) = 0
    ioctl(1</dev/pts/8>, TCSETS, 0x7ffe28666290) = 0
    ioctl(2</dev/pts/8>, TCSETS, 0x7ffe28666290) = 0
    ioctl(3</home/acme/hg/galileo/run>, TCSETS, 0x7ffe286663f0) = -1 ENOTTY (Inappropriate ioctl for device)
    ioctl(1</dev/pts/8>, TCSETS, 0x7ffe286655a0) = 0
    ioctl(1</dev/pts/8>, TCSETS, 0x7ffe28665470) = 0
    ioctl(1</dev/pts/8>, TCSETS, 0x7ffe28665470) = 0
    ioctl(1</dev/pts/8>, TCSETS, 0x7ffe286654a0) = 0
    ioctl(1</dev/pts/8>, TCSETS, 0x7ffe286654a0) = 0
    ioctl(1</dev/pts/8>, TCSETS, 0x7ffe28665400) = 0
    ioctl(1</dev/pts/8>, TIOCSWINSZ, 0x7ffe286654c0) = 0
    ioctl(0</dev/pts/8>, TIOCSWINSZ, 0x7ffe28665560) = 0
    ioctl(0</dev/pts/8>, TIOCSWINSZ, 0x7ffe28665560) = 0
    ioctl(0</dev/pts/8>, TIOCMGET, 0x7ffe28665560) = 0
    ioctl(0</dev/pts/8>, TCSETS, 0x7ffe28665530) = 0
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_GET_CAPABILITIES, 0x561468dad048) = 0
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_GETDRIVER, 0x7ffe28665500) = -1 ENODATA (No data available)
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_GETDRIVER, 0x7ffe28665500) = -1 ENODATA (No data available)
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_SETCONFIGURATION, 0x7ffe2866513c) = 0
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_CLAIMINTERFACE, 0x7ffe286647bc) = 0
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_SUBMITURB, 0x561468dace40) = 0
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_REAPURBNDELAY, 0x7ffe28664c10) = 0
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_REAPURBNDELAY, 0x7ffe28664c10) = -1 EAGAIN (Resource temporarily unavailable)
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_SUBMITURB, 0x561468dace40) = 0
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_REAPURBNDELAY, 0x7ffe28664dd0) = 0
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_REAPURBNDELAY, 0x7ffe28664dd0) = -1 EAGAIN (Resource temporarily unavailable)
    <SNIP>
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_SUBMITURB, 0x561468e72ec0) = 0
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_REAPURBNDELAY, 0x7ffe28664cc0) = 0
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_REAPURBNDELAY, 0x7ffe28664cc0) = -1 EAGAIN (Resource temporarily unavailable)
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_RELEASEINTERFACE, 0x7ffe2866463c) = 0
    ioctl(10</dev/bus/usb/001/011>, USBDEVFS_RELEASEINTERFACE, 0x7ffe2866463c) = 0
    Tracker: 813F4690C3D1: Synchronisation successful
    #

    Cc: Adrian Hunter <adrian.hunter@intel.com>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Wang Nan <wangnan0@huawei.com>
    Link: https://lkml.kernel.org/n/tip-6x2cawak7jno3gpp5pagzj50@git.kernel.org
    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
    ---
    tools/perf/trace/beauty/ioctl.c | 22 ++++++++++++++++++++++
    1 file changed, 22 insertions(+)

    diff --git a/tools/perf/trace/beauty/ioctl.c b/tools/perf/trace/beauty/ioctl.c
    index 9efeb6a936c2..620350d41209 100644
    --- a/tools/perf/trace/beauty/ioctl.c
    +++ b/tools/perf/trace/beauty/ioctl.c
    @@ -112,6 +112,17 @@ static size_t ioctl__scnprintf_perf_cmd(int nr, int dir, char *bf, size_t size)
    return scnprintf(bf, size, "(%#x, %#x, %#x)", 0xAE, nr, dir);
    }

    +static size_t ioctl__scnprintf_usbdevfs_cmd(int nr, int dir, char *bf, size_t size)
    +{
    +#include "trace/beauty/generated/ioctl/usbdevfs_ioctl_array.c"
    + static DEFINE_STRARRAY(usbdevfs_ioctl_cmds, "");
    +
    + if (nr < strarray__usbdevfs_ioctl_cmds.nr_entries && strarray__usbdevfs_ioctl_cmds.entries[nr] != NULL)
    + return scnprintf(bf, size, "USBDEVFS_%s", strarray__usbdevfs_ioctl_cmds.entries[nr]);
    +
    + return scnprintf(bf, size, "(%c, %#x, %#x)", 'U', nr, dir);
    +}
    +
    static size_t ioctl__scnprintf_cmd(unsigned long cmd, char *bf, size_t size, bool show_prefix)
    {
    const char *prefix = "_IOC_";
    @@ -157,9 +168,20 @@ static size_t ioctl__scnprintf_cmd(unsigned long cmd, char *bf, size_t size, boo
    return printed + scnprintf(bf + printed, size - printed, ", %#x, %#x, %#x)", type, nr, sz);
    }

    +#ifndef USB_DEVICE_MAJOR
    +#define USB_DEVICE_MAJOR 189
    +#endif // USB_DEVICE_MAJOR
    +
    size_t syscall_arg__scnprintf_ioctl_cmd(char *bf, size_t size, struct syscall_arg *arg)
    {
    unsigned long cmd = arg->val;
    + unsigned int fd = syscall_arg__val(arg, 0);
    + struct file *file = thread__files_entry(arg->thread, fd);
    +
    + if (file != NULL) {
    + if (file->dev_maj == USB_DEVICE_MAJOR)
    + return ioctl__scnprintf_usbdevfs_cmd(_IOC_NR(cmd), _IOC_DIR(cmd), bf, size);
    + }

    return ioctl__scnprintf_cmd(cmd, bf, size, arg->show_string_prefix);
    }
    --
    2.19.2
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