[PATCH 1/4] CIFS: Simplify connection structure search calls

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Use separate functions for comparison between existing structure
and what we are requesting for to make server, session and tcon
search code easier to use on next superblock match call.

Signed-off-by: Pavel Shilovsky <piastry@xxxxxxxxxxx>
---
 fs/cifs/connect.c |  104 ++++++++++++++++++++++++++++++++---------------------
 1 files changed, 63 insertions(+), 41 deletions(-)

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index dd9d3e9..990c3e0 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1640,32 +1640,41 @@ match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
 	return true;
 }
 
-static struct TCP_Server_Info *
-cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
+static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr,
+			 struct smb_vol *vol)
 {
-	struct TCP_Server_Info *server;
-
-	spin_lock(&cifs_tcp_ses_lock);
-	list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
-		if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
-			continue;
+	if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
+		return 0;
 
-		if (!match_address(server, addr,
-				   (struct sockaddr *)&vol->srcaddr))
-			continue;
+	if (!match_address(server, addr,
+			   (struct sockaddr *)&vol->srcaddr))
+		return 0;
 
 #ifdef CONFIG_CIFS_SMB2
-		if ((server->is_smb2 == true) && (vol->use_smb2 == false))
-			continue;
+	if ((server->is_smb2 == true) && (vol->use_smb2 == false))
+		return 0;
 
-		if ((server->is_smb2 == false) && (vol->use_smb2 == true))
-			continue;
+	if ((server->is_smb2 == false) && (vol->use_smb2 == true))
+		return 0;
 #endif /* CONFIG_CIFS_SMB2 */
 
-		if (!match_port(server, addr))
-			continue;
+	if (!match_port(server, addr))
+		return 0;
+
+	if (!match_security(server, vol))
+		return 0;
+
+	return 1;
+}
+
+static struct TCP_Server_Info *
+cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
+{
+	struct TCP_Server_Info *server;
 
-		if (!match_security(server, vol))
+	spin_lock(&cifs_tcp_ses_lock);
+	list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
+		if (!match_server(server, addr, vol))
 			continue;
 
 		++server->srv_count;
@@ -1865,6 +1874,30 @@ out_err:
 	return ERR_PTR(rc);
 }
 
+static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
+{
+	switch (ses->server->secType) {
+	case Kerberos:
+		if (vol->cred_uid != ses->cred_uid)
+			return 0;
+		break;
+	default:
+		/* anything else takes username/password */
+		if (ses->user_name == NULL)
+			return 0;
+		if (strncmp(ses->user_name, vol->username,
+			    MAX_USERNAME_SIZE))
+			return 0;
+		if (strlen(vol->username) != 0 &&
+		    ses->password != NULL &&
+		    strncmp(ses->password,
+			    vol->password ? vol->password : "",
+			    MAX_PASSWORD_SIZE))
+			return 0;
+	}
+	return 1;
+}
+
 static struct cifs_ses *
 cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
 {
@@ -1872,25 +1905,8 @@ cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
 
 	spin_lock(&cifs_tcp_ses_lock);
 	list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
-		switch (server->secType) {
-		case Kerberos:
-			if (vol->cred_uid != ses->cred_uid)
-				continue;
-			break;
-		default:
-			/* anything else takes username/password */
-			if (ses->user_name == NULL)
-				continue;
-			if (strncmp(ses->user_name, vol->username,
-				    MAX_USERNAME_SIZE))
-				continue;
-			if (strlen(vol->username) != 0 &&
-			    ses->password != NULL &&
-			    strncmp(ses->password,
-				    vol->password ? vol->password : "",
-				    MAX_PASSWORD_SIZE))
-				continue;
-		}
+		if (!match_session(ses, vol))
+			continue;
 		++ses->ses_count;
 		spin_unlock(&cifs_tcp_ses_lock);
 		return ses;
@@ -2033,6 +2049,15 @@ get_ses_fail:
 	return ERR_PTR(rc);
 }
 
+static int match_tcon(struct cifs_tcon *tcon, const char *unc)
+{
+	if (tcon->tidStatus == CifsExiting)
+		return 0;
+	if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
+		return 0;
+	return 1;
+}
+
 static struct cifs_tcon *
 cifs_find_tcon(struct cifs_ses *ses, const char *unc)
 {
@@ -2042,11 +2067,8 @@ cifs_find_tcon(struct cifs_ses *ses, const char *unc)
 	spin_lock(&cifs_tcp_ses_lock);
 	list_for_each(tmp, &ses->tcon_list) {
 		tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
-		if (tcon->tidStatus == CifsExiting)
-			continue;
-		if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
+		if (!match_tcon(tcon, unc))
 			continue;
-
 		++tcon->tc_count;
 		spin_unlock(&cifs_tcp_ses_lock);
 		return tcon;
-- 
1.7.1

--
To unsubscribe from this list: send the line "unsubscribe linux-cifs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux