> -----Original Message----- > From: netdev-ow...@vger.kernel.org <netdev-ow...@vger.kernel.org> On > Behalf Of Jiri Pirko > Sent: Monday, April 27, 2020 10:43 PM > To: Keller, Jacob E <jacob.e.kel...@intel.com> > Cc: netdev@vger.kernel.org; Jakub Kicinski <k...@kernel.org> > Subject: Re: [iproute2] devlink: add support for DEVLINK_CMD_REGION_NEW > > Tue, Apr 28, 2020 at 04:05:12AM CEST, jacob.e.kel...@intel.com wrote: > >Add support to request that a new snapshot be taken immediately for > >a devlink region. To avoid confusion, the desired snapshot id must be > >provided. > > > >Note that if a region does not support snapshots on demand, the kernel > >will reject the request with -EOPNOTSUP. > > > >Signed-off-by: Jacob Keller <jacob.e.kel...@intel.com> > >--- > > devlink/devlink.c | 20 ++++++++++++++++++++ > > 1 file changed, 20 insertions(+) > > > >diff --git a/devlink/devlink.c b/devlink/devlink.c > >index 67e6e64181f9..c750ee1ec6d3 100644 > >--- a/devlink/devlink.c > >+++ b/devlink/devlink.c > >@@ -6362,10 +6362,27 @@ static int cmd_region_read(struct dl *dl) > > return err; > > } > > > >+static int cmd_region_snapshot_new(struct dl *dl) > >+{ > >+ struct nlmsghdr *nlh; > >+ int err; > >+ > >+ nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_REGION_NEW, > >+ NLM_F_REQUEST | NLM_F_ACK); > >+ > >+ err = dl_argv_parse_put(nlh, dl, DL_OPT_HANDLE_REGION | > >+ DL_OPT_REGION_SNAPSHOT_ID, 0); > >+ if (err) > >+ return err; > >+ > >+ return _mnlg_socket_sndrcv(dl->nlg, nlh, NULL, NULL); > >+} > >+ > > static void cmd_region_help(void) > > { > > pr_err("Usage: devlink region show [ DEV/REGION ]\n"); > > pr_err(" devlink region del DEV/REGION snapshot SNAPSHOT_ID\n"); > >+ pr_err(" devlink region new DEV/REGION [snapshot > SNAPSHOT_ID]\n"); > > Same as for "del", snapshot id is mandatory. You should not have it in "[]". > Ah, right! > > > pr_err(" devlink region dump DEV/REGION [ snapshot SNAPSHOT_ID > ]\n"); > > pr_err(" devlink region read DEV/REGION [ snapshot SNAPSHOT_ID ] > address ADDRESS length LENGTH\n"); > > } > >@@ -6389,6 +6406,9 @@ static int cmd_region(struct dl *dl) > > } else if (dl_argv_match(dl, "read")) { > > dl_arg_inc(dl); > > return cmd_region_read(dl); > >+ } else if (dl_argv_match(dl, "new")) { > >+ dl_arg_inc(dl); > >+ return cmd_region_snapshot_new(dl); > > } > > pr_err("Command \"%s\" not found\n", dl_argv(dl)); > > return -ENOENT; > >-- > >2.25.2 > >