WARNING: line length of 88 exceeds 80 columns
#547: FILE: include/net/xdp.h:598:
+xdp_entry_fetch_or_create(struct net_device *dev, enum bpf_xdp_mode mode, bool *created)

WARNING: line length of 82 exceeds 80 columns
#696: FILE: net/core/dev.c:5158:
+		act = netif_receive_generic_xdp(pskb, &xdp, xdp_array, &xdp_prog);

WARNING: line length of 99 exceeds 80 columns
#785: FILE: net/core/dev.c:9392:
+static bool dev_xdp_has_prog(struct net_device *dev, enum bpf_xdp_mode mode, struct bpf_prog *prog)

WARNING: line length of 96 exceeds 80 columns
#789: FILE: net/core/dev.c:9396:
+	/* Special case for NULL program, in which case we check if no programs are attached. */

WARNING: line length of 82 exceeds 80 columns
#796: FILE: net/core/dev.c:9403:
+static int dev_xdp_prog_mode_count(struct net_device *dev, enum bpf_xdp_mode mode)

WARNING: line length of 82 exceeds 80 columns
#835: FILE: net/core/dev.c:9452:
+static bool dev_xdp_supports_mprog(struct net_device *dev, enum bpf_xdp_mode mode,

WARNING: line length of 99 exceeds 80 columns
#879: FILE: net/core/dev.c:9490:
+		NL_SET_ERR_MSG(extack, "Underlying driver does not support multiple XDP programs");

WARNING: line length of 87 exceeds 80 columns
#955: FILE: net/core/dev.c:9559:
+		WARN_ON(dev_xdp_install(dev, mode, bpf_op, NULL, 0, NULL, NULL, NULL));

WARNING: line length of 88 exceeds 80 columns
#983: FILE: net/core/dev.c:9577:
+static int verify_dev_xdp_attach(struct net_device *dev, struct netlink_ext_ack *extack,

WARNING: line length of 86 exceeds 80 columns
#984: FILE: net/core/dev.c:9578:
+				 struct bpf_xdp_link *link, struct bpf_prog *new_prog,

WARNING: line length of 89 exceeds 80 columns
#1004: FILE: net/core/dev.c:9615:
+		NL_SET_ERR_MSG(extack, "Netlink does not support multiple XDP programs");

WARNING: line length of 86 exceeds 80 columns
#1020: FILE: net/core/dev.c:9633:
+	if (link && dev_xdp_has_any_prog(dev, mode) && !dev_xdp_has_link(dev, mode)) {

WARNING: line length of 84 exceeds 80 columns
#1025: FILE: net/core/dev.c:9637:
+	if ((flags & XDP_FLAGS_REPLACE) && !dev_xdp_has_prog(dev, mode, old_prog)) {

WARNING: line length of 95 exceeds 80 columns
#1034: FILE: net/core/dev.c:9651:
+		if ((flags & XDP_FLAGS_UPDATE_IF_NOEXIST) && dev_xdp_has_any_prog(dev, mode)) {

WARNING: line length of 89 exceeds 80 columns
#1060: FILE: net/core/dev.c:9680:
+static int dev_xdp_attach_netlink(struct net_device *dev, struct netlink_ext_ack *extack,

WARNING: line length of 87 exceeds 80 columns
#1061: FILE: net/core/dev.c:9681:
+				  struct bpf_prog *new_prog, struct bpf_prog *old_prog,

WARNING: line length of 82 exceeds 80 columns
#1073: FILE: net/core/dev.c:9693:
+	err = verify_dev_xdp_attach(dev, extack, NULL, new_prog, old_prog, flags);

WARNING: line length of 96 exceeds 80 columns
#1080: FILE: net/core/dev.c:9700:
+		NL_SET_ERR_MSG(extack, "Underlying driver does not support XDP in native mode");

WARNING: line length of 94 exceeds 80 columns
#1090: FILE: net/core/dev.c:9708:
+	/* Netlink does not support mprog and this is validated in verify_dev_xdp_attach(). */

WARNING: line length of 94 exceeds 80 columns
#1093: FILE: net/core/dev.c:9711:
+	/* If no new program to attach or current program to detach, there's nothing to do. */

WARNING: line length of 83 exceeds 80 columns
#1110: FILE: net/core/dev.c:9725:
+		err = bpf_mprog_detach(entry, &entry_new, cur_prog, NULL, 0, 0, 0);

WARNING: line length of 92 exceeds 80 columns
#1118: FILE: net/core/dev.c:9732:
+		err = dev_xdp_install(dev, mode, bpf_op, extack, flags, entry_new, new_prog,

WARNING: line length of 96 exceeds 80 columns
#1165: FILE: net/core/dev.c:9776:
+		NL_SET_ERR_MSG(extack, "Underlying driver does not support XDP in native mode");

WARNING: line length of 85 exceeds 80 columns
#1173: FILE: net/core/dev.c:9784:
+	err = bpf_mprog_attach(entry, &entry_new, prog, &link->link, NULL, bpf_flags,

WARNING: line length of 90 exceeds 80 columns
#1179: FILE: net/core/dev.c:9790:
+	/* Attachment via link always installs a new program so always call the driver. */

WARNING: line length of 87 exceeds 80 columns
#1180: FILE: net/core/dev.c:9791:
+	err = dev_xdp_install(dev, mode, bpf_op, extack, flags, entry_new, prog, NULL);

WARNING: line length of 90 exceeds 80 columns
#1226: FILE: net/core/dev.c:9830:
+	WARN_ON(dev_xdp_install(dev, mode, bpf_op, NULL, 0, entry_new, NULL, link->prog));

total: 0 errors, 27 warnings, 0 checks, 1231 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit b6acfad45c7a ("bpf: Add multi-prog support for XDP BPF programs") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 27 warnings, 0 checks, 1231 lines checked