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ksmbd: add continuous availability share parameter

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If capabilities of the share is not SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY,
ksmbd should not grant a persistent handle to the client.
This patch add continuous availability share parameter to control it.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Namjae Jeon 2024-04-20 09:17:58 +09:00 committed by Steve French
parent 0268a7cc7f
commit e9d8c2f95a
2 changed files with 27 additions and 19 deletions
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1
fs/smb/server/ksmbd_netlink.h
View File

@ -357,6 +357,7 @@ enum KSMBD_TREE_CONN_STATUS {
#define KSMBD_SHARE_FLAG_ACL_XATTR BIT(13)
#define KSMBD_SHARE_FLAG_UPDATE BIT(14)
#define KSMBD_SHARE_FLAG_CROSSMNT BIT(15)
#define KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY BIT(16)
/*
* Tree connect request flags.

9
fs/smb/server/smb2pdu.c
View File

@ -1988,6 +1988,11 @@ int smb2_tree_connect(struct ksmbd_work *work)
write_unlock(&sess->tree_conns_lock);
rsp->StructureSize = cpu_to_le16(16);
out_err1:
if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE &&
test_share_config_flag(share,
KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY;
else
rsp->Capabilities = 0;
rsp->Reserved = 0;
/* default manual caching */
@ -3502,7 +3507,9 @@ int smb2_open(struct ksmbd_work *work)
memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) {
if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent)
if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent &&
test_share_config_flag(work->tcon->share_conf,
KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY))
fp->is_persistent = true;
else
fp->is_durable = true;