CIFS: parse and store info on iface queries
Signed-off-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Aurelien Aptel
Steve French
parent
b6f0dd5d75
commit
fe856be475
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@ -294,34 +294,176 @@ smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
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return rsize;
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}
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#ifdef CONFIG_CIFS_STATS2
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static int
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parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
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size_t buf_len,
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struct cifs_server_iface **iface_list,
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size_t *iface_count)
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{
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struct network_interface_info_ioctl_rsp *p;
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struct sockaddr_in *addr4;
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struct sockaddr_in6 *addr6;
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struct iface_info_ipv4 *p4;
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struct iface_info_ipv6 *p6;
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struct cifs_server_iface *info;
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ssize_t bytes_left;
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size_t next = 0;
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int nb_iface = 0;
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int rc = 0;
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*iface_list = NULL;
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*iface_count = 0;
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/*
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* Fist pass: count and sanity check
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*/
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bytes_left = buf_len;
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p = buf;
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while (bytes_left >= sizeof(*p)) {
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nb_iface++;
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next = le32_to_cpu(p->Next);
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if (!next) {
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bytes_left -= sizeof(*p);
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break;
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}
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p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
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bytes_left -= next;
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}
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if (!nb_iface) {
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cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
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rc = -EINVAL;
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goto out;
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}
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if (bytes_left || p->Next)
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cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
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/*
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* Second pass: extract info to internal structure
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*/
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*iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
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if (!*iface_list) {
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rc = -ENOMEM;
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goto out;
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}
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info = *iface_list;
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bytes_left = buf_len;
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p = buf;
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while (bytes_left >= sizeof(*p)) {
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info->speed = le64_to_cpu(p->LinkSpeed);
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info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
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info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
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cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
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cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
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cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
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le32_to_cpu(p->Capability));
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switch (p->Family) {
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/*
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* The kernel and wire socket structures have the same
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* layout and use network byte order but make the
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* conversion explicit in case either one changes.
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*/
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case INTERNETWORK:
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addr4 = (struct sockaddr_in *)&info->sockaddr;
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p4 = (struct iface_info_ipv4 *)p->Buffer;
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addr4->sin_family = AF_INET;
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memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
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/* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
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addr4->sin_port = cpu_to_be16(CIFS_PORT);
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cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
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&addr4->sin_addr);
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break;
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case INTERNETWORKV6:
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addr6 = (struct sockaddr_in6 *)&info->sockaddr;
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p6 = (struct iface_info_ipv6 *)p->Buffer;
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addr6->sin6_family = AF_INET6;
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memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
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/* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
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addr6->sin6_flowinfo = 0;
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addr6->sin6_scope_id = 0;
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addr6->sin6_port = cpu_to_be16(CIFS_PORT);
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cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
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&addr6->sin6_addr);
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break;
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default:
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cifs_dbg(VFS,
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"%s: skipping unsupported socket family\n",
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__func__);
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goto next_iface;
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}
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(*iface_count)++;
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info++;
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next_iface:
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next = le32_to_cpu(p->Next);
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if (!next)
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break;
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p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
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bytes_left -= next;
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}
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if (!*iface_count) {
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rc = -EINVAL;
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goto out;
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}
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out:
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if (rc) {
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kfree(*iface_list);
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*iface_count = 0;
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*iface_list = NULL;
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}
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return rc;
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}
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static int
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SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
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{
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int rc;
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unsigned int ret_data_len = 0;
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struct network_interface_info_ioctl_rsp *out_buf;
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struct network_interface_info_ioctl_rsp *out_buf = NULL;
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struct cifs_server_iface *iface_list;
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size_t iface_count;
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struct cifs_ses *ses = tcon->ses;
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rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
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FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
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NULL /* no data input */, 0 /* no data input */,
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(char **)&out_buf, &ret_data_len);
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if (rc != 0)
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if (rc != 0) {
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cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
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else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
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cifs_dbg(VFS, "server returned bad net interface info buf\n");
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rc = -EINVAL;
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} else {
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/* Dump info on first interface */
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cifs_dbg(FYI, "Adapter Capability 0x%x\t",
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le32_to_cpu(out_buf->Capability));
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cifs_dbg(FYI, "Link Speed %lld\n",
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le64_to_cpu(out_buf->LinkSpeed));
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goto out;
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}
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rc = parse_server_interfaces(out_buf, ret_data_len,
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&iface_list, &iface_count);
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if (rc)
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goto out;
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spin_lock(&ses->iface_lock);
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kfree(ses->iface_list);
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ses->iface_list = iface_list;
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ses->iface_count = iface_count;
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ses->iface_last_update = jiffies;
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spin_unlock(&ses->iface_lock);
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out:
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kfree(out_buf);
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return rc;
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}
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#endif /* STATS2 */
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void
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smb2_cached_lease_break(struct work_struct *work)
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@ -399,9 +541,7 @@ smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
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if (rc)
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return;
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#ifdef CONFIG_CIFS_STATS2
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SMB3_request_interfaces(xid, tcon);
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#endif /* STATS2 */
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SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
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FS_ATTRIBUTE_INFORMATION);
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