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network: skip to reassign master ifindex if already set
Otherwise, the slave interface may go down, especially when the master is bond. Fixes #25067.
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@ -543,6 +543,12 @@ static int link_is_ready_to_set_link(Link *link, Request *req) {
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m = link->network->vrf->ifindex;
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}
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if (m == (uint32_t) link->master_ifindex) {
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/* The requested master is already set. */
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link->master_set = true;
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return -EALREADY; /* indicate to cancel the request. */
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}
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req->userdata = UINT32_TO_PTR(m);
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break;
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}
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@ -568,6 +574,8 @@ static int link_process_set_link(Request *req, Link *link, void *userdata) {
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assert(link);
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r = link_is_ready_to_set_link(link, req);
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if (r == -EALREADY)
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return 1; /* Cancel the request. */
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if (r <= 0)
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return r;
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