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[smb3] improve error message when mount options conflict with posix

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POSIX extensions require SMB3.1.1 (so improve the error
message when vers=3.0, 2.1 or 2.0 is specified on mount)

Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Steve French 2022-02-06 18:59:57 -06:00
parent dfd42facf1
commit d0cbe56a7d
1 changed files with 10 additions and 1 deletions
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11
fs/cifs/connect.c
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@ -2340,10 +2340,19 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb3_fs_context *ctx)
if (ses->server->posix_ext_supported) {
tcon->posix_extensions = true;
pr_warn_once("SMB3.11 POSIX Extensions are experimental\n");
} else {
} else if ((ses->server->vals->protocol_id == SMB311_PROT_ID) ||
(strcmp(ses->server->vals->version_string,
SMB3ANY_VERSION_STRING) == 0) ||
(strcmp(ses->server->vals->version_string,
SMBDEFAULT_VERSION_STRING) == 0)) {
cifs_dbg(VFS, "Server does not support mounting with posix SMB3.11 extensions\n");
rc = -EOPNOTSUPP;
goto out_fail;
} else {
cifs_dbg(VFS, "Check vers= mount option. SMB3.11 "
"disabled but required for POSIX extensions\n");
rc = -EOPNOTSUPP;
goto out_fail;
}
}