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Jiri Pirko says: ==================== devlink: introduce notifications filtering From: Jiri Pirko <jiri@nvidia.com> Currently the user listening on a socket for devlink notifications gets always all messages for all existing devlink instances and objects, even if he is interested only in one of those. That may cause unnecessary overhead on setups with thousands of instances present. User is currently able to narrow down the devlink objects replies to dump commands by specifying select attributes. Allow similar approach for notifications providing user a new notify-filter-set command to select attributes with values the notification message has to match. In that case, it is delivered to the socket. Note that the filtering is done per-socket, so multiple users may specify different selection of attributes with values. This patchset initially introduces support for following attributes: DEVLINK_ATTR_BUS_NAME DEVLINK_ATTR_DEV_NAME DEVLINK_ATTR_PORT_INDEX Patches #1 - #4 are preparations in devlink code, patch #3 is an optimization done on the way. Patches #5 - #7 are preparations in netlink and generic netlink code. Patch #8 is the main one in this set implementing of the notify-filter-set command and the actual per-socket filtering. Patch #9 extends the infrastructure allowing to filter according to a port index. Example: $ devlink mon port pci/0000:08:00.0/32768 [port,new] pci/0000:08:00.0/32768: type notset flavour pcisf controller 0 pfnum 0 sfnum 107 splittable false function: hw_addr 00:00:00:00:00:00 state inactive opstate detached roce enable [port,new] pci/0000:08:00.0/32768: type eth flavour pcisf controller 0 pfnum 0 sfnum 107 splittable false function: hw_addr 00:00:00:00:00:00 state inactive opstate detached roce enable [port,new] pci/0000:08:00.0/32768: type eth netdev eth3 flavour pcisf controller 0 pfnum 0 sfnum 107 splittable false function: hw_addr 00:00:00:00:00:00 state inactive opstate detached roce enable [port,new] pci/0000:08:00.0/32768: type eth netdev eth3 flavour pcisf controller 0 pfnum 0 sfnum 107 splittable false function: hw_addr 00:00:00:00:00:00 state inactive opstate detached roce enable [port,new] pci/0000:08:00.0/32768: type eth flavour pcisf controller 0 pfnum 0 sfnum 107 splittable false function: hw_addr 00:00:00:00:00:00 state inactive opstate detached roce enable [port,new] pci/0000:08:00.0/32768: type notset flavour pcisf controller 0 pfnum 0 sfnum 107 splittable false function: hw_addr 00:00:00:00:00:00 state inactive opstate detached roce enable [port,del] pci/0000:08:00.0/32768: type notset flavour pcisf controller 0 pfnum 0 sfnum 107 splittable false function: hw_addr 00:00:00:00:00:00 state inactive opstate detached roce enable ==================== Link: https://lore.kernel.org/r/20231216123001.1293639-1-jiri@resnulli.us Signed-off-by: Paolo Abeni <pabeni@redhat.com> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.