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From 1e6837c8ce063399eeb9580104da33f807e15443 Mon Sep 17 00:00:00 2001
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From: Chris Leech <cleech@redhat.com>
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Date: Tue, 23 Mar 2021 11:16:06 -0700
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Subject: [PATCH 2/5] Revert "Make gcc compiler happy about ifname string
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truncation."
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This change dropped the "." from between the physical interface name and
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the vlan number, making fipvlan created vlan names incompatible with
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fcoeadm commands that ended up calling get_pci_dev_from_netdev in
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lib/sysfs_hba.c (fcoeadm -i). That requirement should be fixed, but for
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now lets deal with the fipvlan naming regression.
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safe_makevlan_name isn't doing anything that can't be handled by
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checking the return from snprintf
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This reverts commit eee875e6526786031ec916274deec92148677c38.
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Signed-off-by: Chris Leech <cleech@redhat.com>
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---
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fipvlan.c | 34 +---------------------------------
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1 file changed, 1 insertion(+), 33 deletions(-)
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diff --git a/fipvlan.c b/fipvlan.c
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index c8a07339314..fe8d7955cc5 100644
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--- a/fipvlan.c
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+++ b/fipvlan.c
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@@ -595,36 +595,6 @@ static int rtnl_listener_handler(struct nlmsghdr *nh, UNUSED void *arg)
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return -1;
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}
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-static int
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-safe_makevlan_name(char *vlan_name, size_t vsz,
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- char *ifname, int vlan_num, char *suffix)
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-{
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- size_t ifsz = strlen(ifname);
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- size_t susz = strlen(suffix); /* should never be NULL */
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- int nusz;
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- char numbuf[16];
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- char *cp = vlan_name;
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-
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- nusz = snprintf(numbuf, sizeof(numbuf), "%d", vlan_num);
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-
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- if ((ifsz + susz + nusz + 2) > vsz) {
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- FIP_LOG_ERR(EINVAL,
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- "Cannot make VLAN name from ifname=\"%s\", vlan %d, and suffix=\"%s\"\n",
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- ifname, vlan_num, suffix);
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- return -EINVAL;
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- }
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- memcpy(cp, ifname, ifsz);
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- cp += ifsz;
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- memcpy(cp, numbuf, nusz);
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- cp += nusz;
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- if (susz > 0) {
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- memcpy(cp, suffix, susz);
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- cp += susz;
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- }
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- *cp = '\0';
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- return 0;
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-}
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-
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static int
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create_and_start_vlan(struct fcf *fcf, bool vn2vn)
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{
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@@ -654,10 +624,8 @@ create_and_start_vlan(struct fcf *fcf, bool vn2vn)
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real_dev->ifname, fcf->vlan, vlan->ifname);
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rc = 0;
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} else {
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- rc = safe_makevlan_name(vlan_name, sizeof(vlan_name),
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+ snprintf(vlan_name, IFNAMSIZ, "%s.%d%s",
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real_dev->ifname, fcf->vlan, config.suffix);
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- if (rc < 0)
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- return rc;
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rc = vlan_create(fcf->ifindex, fcf->vlan, vlan_name);
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if (rc < 0)
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printf("Failed to create VLAN device %s\n\t%s\n",
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--
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2.26.2
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