git: 0d2058abf3b2 - main - pf: convert DIOCRDELTABLES to netlink

The branch main has been updated by kp:

URL: https://cgit.FreeBSD.org/src/commit/?id=0d2058abf3b252e77dae8808dd744c0293b5f433

commit 0d2058abf3b252e77dae8808dd744c0293b5f433
Author:     Kristof Provost <kp@FreeBSD.org>
AuthorDate: 2025-02-07 17:39:51 +0000
Commit:     Kristof Provost <kp@FreeBSD.org>
CommitDate: 2025-02-10 11:09:47 +0000

    pf: convert DIOCRDELTABLES to netlink
    
    Sponsored by:   Rubicon Communications, LLC ("Netgate")
---
 lib/libpfctl/libpfctl.c  | 38 ++++++++++++++++++++++++++++++++++++++
 lib/libpfctl/libpfctl.h  |  2 ++
 sbin/pfctl/pfctl_radix.c | 15 +--------------
 sys/netpfil/pf/pf_nl.c   | 44 ++++++++++++++++++++++++++++++++++++++++++++
 sys/netpfil/pf/pf_nl.h   |  1 +
 5 files changed, 86 insertions(+), 14 deletions(-)

diff --git a/lib/libpfctl/libpfctl.c b/lib/libpfctl/libpfctl.c
index 50dfcfea703d..8569d691773c 100644
--- a/lib/libpfctl/libpfctl.c
+++ b/lib/libpfctl/libpfctl.c
@@ -3143,3 +3143,41 @@ pfctl_add_table(struct pfctl_handle *h, struct pfr_table *table,
 	return (e.error);
 }
 
+int
+pfctl_del_table(struct pfctl_handle *h, struct pfr_table *table,
+    int *ndel, int flags)
+{
+	struct snl_writer nw;
+	struct snl_errmsg_data e = {};
+	struct nlmsghdr *hdr;
+	uint32_t seq_id;
+	int family_id;
+
+	family_id = snl_get_genl_family(&h->ss, PFNL_FAMILY_NAME);
+	if (family_id == 0)
+		return (ENOTSUP);
+
+	snl_init_writer(&h->ss, &nw);
+	hdr = snl_create_genl_msg_request(&nw, family_id, PFNL_CMD_DEL_TABLE);
+
+	snl_add_msg_attr_string(&nw, PF_T_ANCHOR, table->pfrt_anchor);
+	snl_add_msg_attr_string(&nw, PF_T_NAME, table->pfrt_name);
+	snl_add_msg_attr_u32(&nw, PF_T_TABLE_FLAGS, table->pfrt_flags);
+	snl_add_msg_attr_u32(&nw, PF_T_FLAGS, flags);
+
+	if ((hdr = snl_finalize_msg(&nw)) == NULL)
+		return (ENXIO);
+
+	seq_id = hdr->nlmsg_seq;
+
+	if (!snl_send_message(&h->ss, hdr))
+		return (ENXIO);
+
+	while ((hdr = snl_read_reply_multi(&h->ss, seq_id, &e)) != NULL) {
+		if (!snl_parse_nlmsg(&h->ss, hdr, &ndel_parser, ndel))
+			continue;
+	}
+
+	return (e.error);
+}
+
diff --git a/lib/libpfctl/libpfctl.h b/lib/libpfctl/libpfctl.h
index 300511452d8f..d5d0a43f90a3 100644
--- a/lib/libpfctl/libpfctl.h
+++ b/lib/libpfctl/libpfctl.h
@@ -544,5 +544,7 @@ int	pfctl_clear_tables(struct pfctl_handle *h, struct pfr_table *filter,
 	    int *ndel, int flags);
 int	pfctl_add_table(struct pfctl_handle *h, struct pfr_table *table,
 	    int *nadd, int flags);
+int	pfctl_del_table(struct pfctl_handle *h, struct pfr_table *table,
+	    int *ndel, int flags);
 
 #endif
diff --git a/sbin/pfctl/pfctl_radix.c b/sbin/pfctl/pfctl_radix.c
index 451b83371d05..94de63414885 100644
--- a/sbin/pfctl/pfctl_radix.c
+++ b/sbin/pfctl/pfctl_radix.c
@@ -82,20 +82,7 @@ pfr_add_table(struct pfr_table *tbl, int *nadd, int flags)
 int
 pfr_del_table(struct pfr_table *tbl, int *ndel, int flags)
 {
-	struct pfioc_table io;
-
-	bzero(&io, sizeof io);
-	io.pfrio_flags = flags;
-	io.pfrio_buffer = tbl;
-	io.pfrio_esize = sizeof(*tbl);
-	io.pfrio_size = 1;
-	if (ioctl(dev, DIOCRDELTABLES, &io)) {
-		pfr_report_error(tbl, &io, "delete table");
-		return (-1);
-	}
-	if (ndel != NULL)
-		*ndel = io.pfrio_ndel;
-	return (0);
+	return (pfctl_del_table(pfh, tbl, ndel, flags));
 }
 
 int
diff --git a/sys/netpfil/pf/pf_nl.c b/sys/netpfil/pf/pf_nl.c
index 74c5bdca4f77..97552880b9e3 100644
--- a/sys/netpfil/pf/pf_nl.c
+++ b/sys/netpfil/pf/pf_nl.c
@@ -1879,6 +1879,43 @@ pf_handle_add_table(struct nlmsghdr *hdr, struct nl_pstate *npt)
 	return (0);
 }
 
+static int
+pf_handle_del_table(struct nlmsghdr *hdr, struct nl_pstate *npt)
+{
+	struct pfioc_table attrs = { 0 };
+	struct nl_writer *nw = npt->nw;
+	struct genlmsghdr *ghdr_new;
+	int error;
+
+	error = nl_parse_nlmsg(hdr, &table_parser, npt, &attrs);
+	if (error != 0)
+		return (error);
+
+	PF_RULES_WLOCK();
+	error = pfr_del_tables(&attrs.pfrio_table, 1, &attrs.pfrio_ndel,
+	    attrs.pfrio_flags | PFR_FLAG_USERIOCTL);
+	PF_RULES_WUNLOCK();
+	if (error != 0)
+		return (error);
+
+	if (!nlmsg_reply(nw, hdr, sizeof(struct genlmsghdr)))
+		return (ENOMEM);
+
+	ghdr_new = nlmsg_reserve_object(nw, struct genlmsghdr);
+	ghdr_new->cmd = PFNL_CMD_ADD_TABLE;
+	ghdr_new->version = 0;
+	ghdr_new->reserved = 0;
+
+	nlattr_add_u32(nw, PF_T_NBR_DELETED, attrs.pfrio_ndel);
+
+	if (!nlmsg_end(nw)) {
+		nlmsg_abort(nw);
+		return (ENOMEM);
+	}
+
+	return (0);
+}
+
 static const struct nlhdr_parser *all_parsers[] = {
 	&state_parser,
 	&addrule_parser,
@@ -2087,6 +2124,13 @@ static const struct genl_cmd pf_cmds[] = {
 		.cmd_flags = GENL_CMD_CAP_DO | GENL_CMD_CAP_HASPOL,
 		.cmd_priv = PRIV_NETINET_PF,
 	},
+	{
+		.cmd_num = PFNL_CMD_DEL_TABLE,
+		.cmd_name = "DEL_TABLE",
+		.cmd_cb = pf_handle_del_table,
+		.cmd_flags = GENL_CMD_CAP_DO | GENL_CMD_CAP_HASPOL,
+		.cmd_priv = PRIV_NETINET_PF,
+	},
 };
 
 void
diff --git a/sys/netpfil/pf/pf_nl.h b/sys/netpfil/pf/pf_nl.h
index 38a44c2c4395..a66ff5bc3f1e 100644
--- a/sys/netpfil/pf/pf_nl.h
+++ b/sys/netpfil/pf/pf_nl.h
@@ -63,6 +63,7 @@ enum {
 	PFNL_CMD_GET_SRCNODES = 25,
 	PFNL_CMD_CLEAR_TABLES = 26,
 	PFNL_CMD_ADD_TABLE = 27,
+	PFNL_CMD_DEL_TABLE = 28,
 	__PFNL_CMD_MAX,
 };
 #define PFNL_CMD_MAX (__PFNL_CMD_MAX -1)