Date: Thu, 6 Feb 2025 19:18:22 GMT From: Zhenlei Huang <zlei@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: e0b2b8fa16a1 - stable/13 - ifnet: Make if_detach_internal() and if_vmove() void Message-ID: <202502061918.516JIMH5015580@gitrepo.freebsd.org>
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The branch stable/13 has been updated by zlei: URL: https://cgit.FreeBSD.org/src/commit/?id=e0b2b8fa16a13abb1ea8326c6ff311d0d94108db commit e0b2b8fa16a13abb1ea8326c6ff311d0d94108db Author: Zhenlei Huang <zlei@FreeBSD.org> AuthorDate: 2025-02-04 15:04:59 +0000 Commit: Zhenlei Huang <zlei@FreeBSD.org> CommitDate: 2025-02-06 18:59:58 +0000 ifnet: Make if_detach_internal() and if_vmove() void if_detach_internal() never fail since change [1]. As a consequence, also does its caller if_vmove(). While here, remove a stall comment. No functional change intended. This reverts commit c7bab2a7ca9a6dae79f970c6730a19b65a1ed86e. [1] a779388f8bb3 if: Protect V_ifnet in vnet_if_return() Reviewed by: glebius MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D48820 (cherry picked from commit bb0348a17974d83671becbd32ea0e4bd2ea61906) (cherry picked from commit 700880a13566193b853f75c87ba5c37d395f6a1e) --- sys/net/if.c | 38 ++++++++++++++------------------------ 1 file changed, 14 insertions(+), 24 deletions(-) diff --git a/sys/net/if.c b/sys/net/if.c index 107ff67d547a..e30e1c7e5dca 100644 --- a/sys/net/if.c +++ b/sys/net/if.c @@ -278,12 +278,12 @@ static int if_getgroup(struct ifgroupreq *, struct ifnet *); static int if_getgroupmembers(struct ifgroupreq *); static void if_delgroups(struct ifnet *); static void if_attach_internal(struct ifnet *, bool); -static int if_detach_internal(struct ifnet *, bool); +static void if_detach_internal(struct ifnet *, bool); static void if_siocaddmulti(void *, int); static void if_link_ifnet(struct ifnet *); static bool if_unlink_ifnet(struct ifnet *, bool); #ifdef VIMAGE -static int if_vmove(struct ifnet *, struct vnet *); +static void if_vmove(struct ifnet *, struct vnet *); #endif #ifdef INET6 @@ -1137,7 +1137,7 @@ if_detach(struct ifnet *ifp) * on a vnet instance shutdown without this flag being set, e.g., when * the cloned interfaces are destoyed as first thing of teardown. */ -static int +static void if_detach_internal(struct ifnet *ifp, bool vmove) { struct ifaddr *ifa; @@ -1272,8 +1272,6 @@ finish_vnet_shutdown: ifp->if_afdata[dp->dom_family] = NULL; } } - - return (0); } #ifdef VIMAGE @@ -1284,20 +1282,16 @@ finish_vnet_shutdown: * unused if_index in target vnet and calls if_grow() if necessary, * and finally find an unused if_xname for the target vnet. */ -static int +static void if_vmove(struct ifnet *ifp, struct vnet *new_vnet) { void *old; - int rc; /* * Detach from current vnet, but preserve LLADDR info, do not * mark as dead etc. so that the ifnet can be reattached later. - * If we cannot find it, we lost the race to someone else. */ - rc = if_detach_internal(ifp, true); - if (rc != 0) - return (rc); + if_detach_internal(ifp, true); /* * Unlink the ifnet from ifindex_table[] in current vnet, and shrink @@ -1336,7 +1330,6 @@ if_vmove(struct ifnet *ifp, struct vnet *new_vnet) if_attach_internal(ifp, true); CURVNET_RESTORE(); - return (0); } /* @@ -1347,7 +1340,6 @@ if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) { struct prison *pr; struct ifnet *difp; - int error; bool found; bool shutdown; @@ -1393,16 +1385,15 @@ if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) } /* Move the interface into the child jail/vnet. */ - error = if_vmove(ifp, pr->pr_vnet); + if_vmove(ifp, pr->pr_vnet); - /* Report the new if_xname back to the userland on success. */ - if (error == 0) - sprintf(ifname, "%s", ifp->if_xname); + /* Report the new if_xname back to the userland. */ + sprintf(ifname, "%s", ifp->if_xname); sx_xunlock(&ifnet_detach_sxlock); prison_free(pr); - return (error); + return (0); } static int @@ -1411,7 +1402,7 @@ if_vmove_reclaim(struct thread *td, char *ifname, int jid) struct prison *pr; struct vnet *vnet_dst; struct ifnet *ifp; - int error, found; + int found; bool shutdown; /* Try to find the prison within our visibility. */ @@ -1452,16 +1443,15 @@ if_vmove_reclaim(struct thread *td, char *ifname, int jid) found = if_unlink_ifnet(ifp, true); MPASS(found); sx_xlock(&ifnet_detach_sxlock); - error = if_vmove(ifp, vnet_dst); + if_vmove(ifp, vnet_dst); sx_xunlock(&ifnet_detach_sxlock); CURVNET_RESTORE(); - /* Report the new if_xname back to the userland on success. */ - if (error == 0) - sprintf(ifname, "%s", ifp->if_xname); + /* Report the new if_xname back to the userland. */ + sprintf(ifname, "%s", ifp->if_xname); prison_free(pr); - return (error); + return (0); } #endif /* VIMAGE */
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