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smb3: check for and properly advertise directory lease support
Although servers will typically ignore unsupported features, we should advertise the support for directory leases (as Windows e.g. does) in the negotiate protocol capabilities we pass to the server, and should check for the server capability (CAP_DIRECTORY_LEASING) before sending a lease request for an open of a directory. This will prevent us from accidentally sending directory leases to SMB2.1 or SMB2 server for example. Signed-off-by: Steve French <stfrench@microsoft.com> CC: Stable <stable@vger.kernel.org> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
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25f2573512
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2 changed files with 8 additions and 5 deletions
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@ -3654,7 +3654,7 @@ struct smb_version_values smb21_values = {
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struct smb_version_values smb3any_values = {
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.version_string = SMB3ANY_VERSION_STRING,
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.protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
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.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
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.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
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.large_lock_type = 0,
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.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
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.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
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@ -3675,7 +3675,7 @@ struct smb_version_values smb3any_values = {
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struct smb_version_values smbdefault_values = {
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.version_string = SMBDEFAULT_VERSION_STRING,
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.protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
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.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
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.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
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.large_lock_type = 0,
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.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
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.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
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@ -3696,7 +3696,7 @@ struct smb_version_values smbdefault_values = {
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struct smb_version_values smb30_values = {
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.version_string = SMB30_VERSION_STRING,
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.protocol_id = SMB30_PROT_ID,
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.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
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.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
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.large_lock_type = 0,
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.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
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.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
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@ -3717,7 +3717,7 @@ struct smb_version_values smb30_values = {
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struct smb_version_values smb302_values = {
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.version_string = SMB302_VERSION_STRING,
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.protocol_id = SMB302_PROT_ID,
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.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
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.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
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.large_lock_type = 0,
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.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
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.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
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@ -3738,7 +3738,7 @@ struct smb_version_values smb302_values = {
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struct smb_version_values smb311_values = {
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.version_string = SMB311_VERSION_STRING,
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.protocol_id = SMB311_PROT_ID,
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.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
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.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
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.large_lock_type = 0,
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.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
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.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
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@ -2178,6 +2178,9 @@ SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, __u8 *oplock,
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if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
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*oplock == SMB2_OPLOCK_LEVEL_NONE)
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req->RequestedOplockLevel = *oplock;
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else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) &&
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(oparms->create_options & CREATE_NOT_FILE))
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req->RequestedOplockLevel = *oplock; /* no srv lease support */
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else {
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rc = add_lease_context(server, iov, &n_iov,
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oparms->fid->lease_key, oplock);
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