diff options
| author | Suresh Jayaraman | 2009-08-20 13:03:34 +0530 |
|---|---|---|
| committer | Steve French | 2009-09-01 17:08:48 +0000 |
| commit | bdb97adcdf0993adbd2eef44b4533620d43792de (patch) | |
| tree | 5d2a120233c93d6a372d26d5ce3fc6cb6525fa6e /fs/cifs | |
| parent | 1b3859bc9e20d764316346665fc93ecea2d2b176 (diff) | |
PATCH] cifs: fix broken mounts when a SSH tunnel is used (try #4)
One more try..
It seems there is a regression that got introduced while Jeff fixed
all the mount/umount races. While attempting to find whether a tcp
session is already existing, we were not checking whether the "port"
used are the same. When a second mount is attempted with a different
"port=" option, it is being ignored. Because of this the cifs mounts
that uses a SSH tunnel appears to be broken.
Steps to reproduce:
1. create 2 shares
# SSH Tunnel a SMB session
2. ssh -f -L 6111:127.0.0.1:445 root@localhost "sleep 86400"
3. ssh -f -L 6222:127.0.0.1:445 root@localhost "sleep 86400"
4. tcpdump -i lo 6111 &
5. mkdir -p /mnt/mnt1
6. mkdir -p /mnt/mnt2
7. mount.cifs //localhost/a /mnt/mnt1 -o username=guest,ip=127.0.0.1,port=6111
#(shows tcpdump activity on port 6111)
8. mount.cifs //localhost/b /mnt/mnt2 -o username=guest,ip=127.0.0.1,port=6222
#(shows tcpdump activity only on port 6111 and not on 6222
Fix by adding a check to compare the port _only_ if the user tries to
override the tcp port with "port=" option, before deciding that an
existing tcp session is found. Also, clean up a bit by replacing
if-else if by a switch statment while at it as suggested by Jeff.
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/connect.c | 45 |
1 files changed, 33 insertions, 12 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 1f3345d7fa79..4e47a9b800ce 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -1377,7 +1377,7 @@ cifs_parse_mount_options(char *options, const char *devname, } static struct TCP_Server_Info * -cifs_find_tcp_session(struct sockaddr_storage *addr) +cifs_find_tcp_session(struct sockaddr_storage *addr, unsigned short int port) { struct list_head *tmp; struct TCP_Server_Info *server; @@ -1397,16 +1397,37 @@ cifs_find_tcp_session(struct sockaddr_storage *addr) if (server->tcpStatus == CifsNew) continue; - if (addr->ss_family == AF_INET && - (addr4->sin_addr.s_addr != - server->addr.sockAddr.sin_addr.s_addr)) - continue; - else if (addr->ss_family == AF_INET6 && - (!ipv6_addr_equal(&server->addr.sockAddr6.sin6_addr, - &addr6->sin6_addr) || - server->addr.sockAddr6.sin6_scope_id != - addr6->sin6_scope_id)) - continue; + switch (addr->ss_family) { + case AF_INET: + if (addr4->sin_addr.s_addr == + server->addr.sockAddr.sin_addr.s_addr) { + addr4->sin_port = htons(port); + /* user overrode default port? */ + if (addr4->sin_port) { + if (addr4->sin_port != + server->addr.sockAddr.sin_port) + continue; + } + break; + } else + continue; + + case AF_INET6: + if (ipv6_addr_equal(&addr6->sin6_addr, + &server->addr.sockAddr6.sin6_addr) && + (addr6->sin6_scope_id == + server->addr.sockAddr6.sin6_scope_id)) { + addr6->sin6_port = htons(port); + /* user overrode default port? */ + if (addr6->sin6_port) { + if (addr6->sin6_port != + server->addr.sockAddr6.sin6_port) + continue; + } + break; + } else + continue; + } ++server->srv_count; write_unlock(&cifs_tcp_ses_lock); @@ -1475,7 +1496,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info) } /* see if we already have a matching tcp_ses */ - tcp_ses = cifs_find_tcp_session(&addr); + tcp_ses = cifs_find_tcp_session(&addr, volume_info->port); if (tcp_ses) return tcp_ses; |