After we install cifs-utils package on to the system and There is no cifs support advertised in /proc/filesystems. Doing a modprobe cifs works, but modinfo cifs shows that it’s the Mellanox dummy cifs kernel module, and trying to mount shares gives the same error as above. Looking deeper, I found that the cifs module is getting overridden by the Mellanox drivers.
[root@almahpc ~]# modprobe cifs
[root@almahpc ~]# modinfo cifs
filename: /lib/modules/4.18.0-425.3.1.el8.x86_64/extra/mlnx-ofa_kernel/fs/cifs/cifs.ko
version: 2.31
license: Dual BSD/GPL
description: cifs dummy kernel module
author: Mohammad Kabat
rhelversion: 8.7
srcversion: 01E451882B55F354B7F130B
depends: mlx_compat
name: cifs
vermagic: 4.18.0-425.3.1.el8.x86_64 SMP mod_unload modversions
[root@ almahpc ~]# grep -c cifs /proc/filesystems
0
[root@almahpc ~]# grep cifs /proc/filesystems
[root@almahpc ~]#
I removed the MLNX driver, and I see now the modinfo cifs is giving the correct version.
[root@almahpc MLNX_OFED_LINUX-23.04-0.5.3.3-rhel8.7-x86_64]# ./uninstall.sh
This program will uninstall all MLNX_OFED_LINUX-23.04-0.5.3.3 packages on your machine.
Do you want to continue?[y/N]:y
rpm -e --allmatches --nodeps mstflint sharp mlnx-ethtool mlnx-ofa_kernel-modules iser infiniband-diags ibutils2 ucx-rdmacm ibarr mlnx-tools knem-modules rdma-core librdmacm-utils libibverbs mlnx-ofa_kernel-source opensm-static srp_daemon ucx ucx-ib hcoll rshim xpmem isert librdmacm libibverbs-utils opensm-libs opensm-devel dpcp ucx-cma ucx-xpmem mlnx-iproute2 mpitests_openmpi mlnx-ofa_kernel kernel-mft xpmem-modules libxpmem libibumad ibsim opensm ibdump ucx-knem mlnxofed-docs knem ibacm perftest ucx-devel openmpi mlnx-ofa_kernel-devel srp rdma-core-devel infiniband-diags rdma-core rshim mlnx-fw-updater mft kernel-mft ofed-scripts rdma-core-devel mlnx-ofa_kernel-23.04-OFED.23.04.0.5.3.1.rhel8u7.x86_64 sharp-3.3.0.MLNX20230417.ec919ce9-1.2304053.x86_64 hcoll-4.8.3221-1.2304053.x86_64 opensm-5.15.0.MLNX20230417.d84ecf64-0.1.2304053.x86_64 opensm-devel-5.15.0.MLNX20230417.d84ecf64-0.1.2304053.x86_64 opensm-static-5.15.0.MLNX20230417.d84ecf64-0.1.2304053.x86_64
Uninstall finished successfully
[root@almahpc MLNX_OFED_LINUX-23.04-0.5.3.3-rhel8.7-x86_64]# modinfo cifs
filename: /lib/modules/4.18.0-425.3.1.el8.x86_64/kernel/fs/cifs/cifs.ko.xz
softdep: gcm
softdep: ccm
softdep: aead2
softdep: sha512
softdep: sha256
softdep: cmac
softdep: aes
softdep: nls
softdep: md5
softdep: md4
softdep: hmac
softdep: ecb
softdep: pre: des
version: 2.29
description: VFS to access SMB3 servers e.g. Samba, Macs, Azure and Windows (and also older servers complying with the SNIA CIFS Specification)
license: GPL
author: Steve French
alias: smb3
alias: fs-smb3
alias: fs-cifs
rhelversion: 8.7
srcversion: 368290631B75A5A1CA09E2C
depends: ib_core,rdma_cm,libarc4,dns_resolver
intree: Y
name: cifs
vermagic: 4.18.0-425.3.1.el8.x86_64 SMP mod_unload modversions
sig_id: PKCS#7
signer: AlmaLinux kernel signing key
sig_key: 34:62:E5:6E:49:5A:36:CC:92:3A:DC:C9:8B:40:D9:2C:16:AB:77:F6
sig_hashalgo: sha256
signature: 5E:4D:97:42:7B:80:B8:41:60:84:FC:AB:CE:57:76:22:B6:B3:7F:CA:
AF:73:72:E1:2B:74:08:2B:8B:0A:AF:A3:F6:02:36:3C:DC:3D:B6:46:
A9:22:17:00:26:02:C2:39:32:5A:D0:95:65:70:C3:21:9D:58:3A:AC:
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C6:54:CD:8F:71:5E:FA:01:FE:1B:08:76:76:0D:C4:AF:35:A8:96:D6:
C6:11:6C:E8:4D:62:B9:B5:D7:B3:BA:C5:8D:D7:8F:90:F8:5D:E1:62:
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BB:12:9B:9E:D4:B1:AD:0C:10:04:2D:92:4C:B6:D6:1A:C6:1A:D9:0C:
21:F0:BA:2D:43:C5:F3:2E:B0:10:8D:6C:51:1A:81:A1:52:46:F9:8D:
88:48:57:63:BC:25:21:2A:06:76:F0:CE:F1:98:DF:04:6E:4E:DF:28:
8C:4B:90:6C:2F:52:CE:4A:6A:A7:12:66:4E:90:D9:29:F2:11:44:D7:
B3:49:C8:79:E3:DD:DC:47:00:04:44:6D:73:65:EC:40:95:7B:38:0A:
65:0C:88:C5:E7:B2:95:53:F1:83:91:D3:AA:1C:A5:80:09:6B:03:42:
5C:B7:5D:C6
parm: smbd_logging_class:Logging class for SMBD transport 0x0 to 0x100 (uint)
parm: smbd_logging_level:Logging level for SMBD transport, 0 (default): error, 1: info (uint)
parm: CIFSMaxBufSize:Network buffer size (not including header) for CIFS requests. 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 for CIFS/SMB1 dialect (N/A for SMB3) Default: 32767 Range: 2 to 32767. (uint)
parm: enable_oplocks:Enable or disable oplocks. Default: y/Y/1 (bool)
parm: enable_gcm_256:Enable requesting strongest (256 bit) GCM encryption. Default: n/N/0 (bool)
parm: require_gcm_256:Require strongest (256 bit) GCM encryption. Default: n/N/0 (bool)
parm: disable_legacy_dialects:To improve security it may be helpful to restrict the ability to override the default dialects (SMB2.1, SMB3 and SMB3.02) on mount with old dialects (CIFS/SMB1 and SMB2) since vers=1.0 (CIFS/SMB1) and vers=2.0 are weaker and less secure. Default: n/N/0 (bool)
[root@almahpc MLNX_OFED_LINUX-23.04-0.5.3.3-rhel8.7-x86_64]#
This looks like a known issue with the Mellanox driver and still no solution is available.
https://docs.nvidia.com/networking/display/MLNXOFEDv23041130/Known+Issues
If you remove the MLNX driver, you can mount CIFS as usual.
I found some information in the following link to fix it
https://mellanox.my.site.com/mellanoxcommunity/s/question/0D51T00008sHiFlSAK/mount-error-cifs-filesystem-not-supported-by-the-system
Could you please provide the procedure to recompile the CIFS module manually after installation of MLNX_OFED.?