Last year I try to add trace event support for usb gadget configfs [1], this time the idea is change a lot, the purpose is trace all user space operation to gadget configuration, include gadget and it's function. In usb gadget configfs, mainly user can do mkdir/rmdir a group, link/unlink a function, change gadget/function attributes, echo operation will touch a struct config_item. It only have one trace event entry which store string, provide several API which represent user operation and generate string from struct config_item. As it is different from last year change, start a new thread. [1] https://lore.kernel.org/linux-usb/1635229309-2821-1-git-send-email-quic_linyyuan@xxxxxxxxxxx/ Linyu Yuan (4): usb: gadget: add trace event of configfs operation usb: gadget: add trace event of configfs group operation usb: gadget: add trace event of configfs link/unlink operation usb: gadget: add trace event of configfs write attributes operation drivers/usb/gadget/Makefile | 1 + drivers/usb/gadget/configfs.c | 188 +++++++++++++++++++++++++ drivers/usb/gadget/function/f_acm.c | 1 + drivers/usb/gadget/function/f_hid.c | 4 + drivers/usb/gadget/function/f_loopback.c | 4 + drivers/usb/gadget/function/f_mass_storage.c | 20 +++ drivers/usb/gadget/function/f_midi.c | 6 + drivers/usb/gadget/function/f_printer.c | 4 + drivers/usb/gadget/function/f_serial.c | 1 + drivers/usb/gadget/function/f_sourcesink.c | 16 +++ drivers/usb/gadget/function/f_uac1.c | 6 + drivers/usb/gadget/function/f_uac1_legacy.c | 4 + drivers/usb/gadget/function/f_uac2.c | 8 ++ drivers/usb/gadget/function/u_ether_configfs.h | 10 ++ drivers/usb/gadget/function/uvc_configfs.c | 42 ++++++ drivers/usb/gadget/trace.h | 39 +++++ include/linux/usb/composite.h | 18 +++ include/linux/usb/gadget_configfs.h | 4 + 18 files changed, 376 insertions(+) create mode 100644 drivers/usb/gadget/trace.h -- 2.7.4
