diff options
Diffstat (limited to 'fs/cifs/smb2pdu.c')
| -rw-r--r-- | fs/cifs/smb2pdu.c | 159 |
1 files changed, 157 insertions, 2 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 2165f0d1596..1bf037ec5a9 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -110,8 +110,8 @@ smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ , hdr->SessionId = tcon->ses->Suid; /* BB check following DFS flags BB */ /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */ - /* if (tcon->share_flags & SHI1005_FLAGS_DFS) - hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */ + if (tcon->share_flags & SHI1005_FLAGS_DFS) + hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; /* BB how does SMB2 do case sensitive? */ /* if (tcon->nocase) hdr->Flags |= SMBFLG_CASELESS; */ @@ -549,3 +549,158 @@ SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) */ return rc; } + +static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) +{ + /* cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[code]); */ +} + +#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) + +int +SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, + struct cifs_tcon *tcon, const struct nls_table *cp) +{ + struct smb2_tree_connect_req *req; + struct smb2_tree_connect_rsp *rsp = NULL; + struct kvec iov[2]; + int rc = 0; + int resp_buftype; + int unc_path_len; + struct TCP_Server_Info *server; + __le16 *unc_path = NULL; + + cFYI(1, "TCON"); + + if ((ses->server) && tree) + server = ses->server; + else + return -EIO; + + if (tcon && tcon->bad_network_name) + return -ENOENT; + + unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); + if (unc_path == NULL) + return -ENOMEM; + + unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1; + unc_path_len *= 2; + if (unc_path_len < 2) { + kfree(unc_path); + return -EINVAL; + } + + rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req); + if (rc) { + kfree(unc_path); + return rc; + } + + if (tcon == NULL) { + /* since no tcon, smb2_init can not do this, so do here */ + req->hdr.SessionId = ses->Suid; + /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED) + req->hdr.Flags |= SMB2_FLAGS_SIGNED; */ + } + + iov[0].iov_base = (char *)req; + /* 4 for rfc1002 length field and 1 for pad */ + iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; + + /* Testing shows that buffer offset must be at location of Buffer[0] */ + req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) + - 1 /* pad */ - 4 /* do not count rfc1001 len field */); + req->PathLength = cpu_to_le16(unc_path_len - 2); + iov[1].iov_base = unc_path; + iov[1].iov_len = unc_path_len; + + inc_rfc1001_len(req, unc_path_len - 1 /* pad */); + + rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); + rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base; + + if (rc != 0) { + if (tcon) { + cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); + tcon->need_reconnect = true; + } + goto tcon_error_exit; + } + + if (rsp == NULL) { + rc = -EIO; + goto tcon_exit; + } + + if (tcon == NULL) { + ses->ipc_tid = rsp->hdr.TreeId; + goto tcon_exit; + } + + if (rsp->ShareType & SMB2_SHARE_TYPE_DISK) + cFYI(1, "connection to disk share"); + else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) { + tcon->ipc = true; + cFYI(1, "connection to pipe share"); + } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) { + tcon->print = true; + cFYI(1, "connection to printer"); + } else { + cERROR(1, "unknown share type %d", rsp->ShareType); + rc = -EOPNOTSUPP; + goto tcon_error_exit; + } + + tcon->share_flags = le32_to_cpu(rsp->ShareFlags); + tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); + tcon->tidStatus = CifsGood; + tcon->need_reconnect = false; + tcon->tid = rsp->hdr.TreeId; + strncpy(tcon->treeName, tree, MAX_TREE_SIZE); + + if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && + ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) + cERROR(1, "DFS capability contradicts DFS flag"); + +tcon_exit: + free_rsp_buf(resp_buftype, rsp); + kfree(unc_path); + return rc; + +tcon_error_exit: + if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) { + cERROR(1, "BAD_NETWORK_NAME: %s", tree); + tcon->bad_network_name = true; + } + goto tcon_exit; +} + +int +SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) +{ + struct smb2_tree_disconnect_req *req; /* response is trivial */ + int rc = 0; + struct TCP_Server_Info *server; + struct cifs_ses *ses = tcon->ses; + + cFYI(1, "Tree Disconnect"); + + if (ses && (ses->server)) + server = ses->server; + else + return -EIO; + + if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) + return 0; + + rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req); + if (rc) + return rc; + + rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0); + if (rc) + cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); + + return rc; +} |