environment: # cat /etc/redhat-release CentOS Linux release 7.3.1611 (Core) # uname -r 3.10.0-514.16.1.el7.x86_64 # modinfo cifs filename: /lib/modules/3.10.0-514.16.1.el7.x86_64/kernel/fs/cifs/cifs.ko version: 2.08 description: VFS to access servers complying with the SNIA CIFS Specification e.g. Samba and Windows license: GPL author: Steve French <sfrench@xxxxxxxxxx> alias: fs-cifs rhelversion: 7.3 srcversion: 119ACC0FE17824C08D648CE depends: dns_resolver intree: Y vermagic: 3.10.0-514.16.1.el7.x86_64 SMP mod_unload modversions signer: CentOS Linux kernel signing key sig_key: 3F:E1:EB:8B:4F:91:D4:84:CD:55:44:84:54:A0:24:DE:56:34:E1:06 sig_hashalgo: sha256 parm: CIFSMaxBufSize:Network buffer size (not including header). Default: 16384 Range: 8192 to 130048 (uint) parm: cifs_min_rcv:Network buffers in pool. Default: 4 Range: 1 to 64 (uint) parm: cifs_min_small:Small network buffers in pool. Default: 30 Range: 2 to 256 (uint) parm: cifs_max_pending:Simultaneous requests to server. Default: 32767 Range: 2 to 32767. (uint) parm: enable_oplocks:Enable or disable oplocks. Default: y/Y/1 (bool) issue: 01) smb vers=1.0 + DFS works as expected: # mount -v -t cifs //my.domain/dfs/path /mnt -o "ro,vers=1.0,domain=my.domain,username=silly_user" # echo $? 0 02) smb vers=3.0 + DFS fails with: # echo 7 > /proc/fs/cifs/cifsFYI ; mount -v -t cifs //my.domain/dfs/path /mnt -o "ro,vers=3.0,domain=my.domain,username=silly_user"; sleep 5 ; echo 0 > /proc/fs/cifs/cifsFYI ; dmesg |tail -3 mount error(38): Function not implemented Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) [273116.707979] Status code returned 0xc0000016 STATUS_MORE_PROCESSING_REQUIRED [273116.712186] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED [273116.713723] CIFS VFS: cifs_mount failed w/return code = -38 03) smb vers=3.0 w/o CFS works as expected # mount -v -t cifs //real.win2k12.server/non-dfs/path /mnt -o "ro,vers=3.0,domain=my.domain,username=silly_user # echo $? 0 Is there another incantation of mount -t cifs to get smbv3 + DFS working? Or is this a known issue (and if so, is there a work-around) ? Thanks in advance! -- 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
