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ksmbd: add support for smb2 max credit parameter

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Add smb2 max credits parameter to adjust maximum credits value to limit
number of outstanding requests.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Namjae Jeon 2021-12-29 23:08:46 +09:00 committed by Steve French
parent cb097b3dd5
commit 004443b3f6
8 changed files with 22 additions and 10 deletions
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1
fs/ksmbd/connection.h
View file

@ -62,7 +62,6 @@ struct ksmbd_conn {
/* References which are made for this Server object*/
atomic_t r_count;
unsigned short total_credits;
unsigned short max_credits;
spinlock_t credits_lock;
wait_queue_head_t req_running_q;
/* Lock to protect requests list*/

1
fs/ksmbd/ksmbd_netlink.h
View file

@ -103,6 +103,7 @@ struct ksmbd_startup_request {
* we set the SPARSE_FILES bit (0x40).
*/
__u32 sub_auth[3]; /* Subauth value for Security ID */
__u32 smb2_max_credits; /* MAX credits */
__u32 ifc_list_sz; /* interfaces list size */
__s8 ____payload[];
};

2
fs/ksmbd/smb2misc.c
View file

@ -326,7 +326,7 @@ static int smb2_validate_credit_charge(struct ksmbd_conn *conn,
ksmbd_debug(SMB, "Insufficient credit charge, given: %d, needed: %d\n",
credit_charge, calc_credit_num);
return 1;
} else if (credit_charge > conn->max_credits) {
} else if (credit_charge > conn->vals->max_credits) {
ksmbd_debug(SMB, "Too large credit charge: %d\n", credit_charge);
return 1;
}

16
fs/ksmbd/smb2ops.c
View file

@ -19,6 +19,7 @@ static struct smb_version_values smb21_server_values = {
.max_read_size = SMB21_DEFAULT_IOSIZE,
.max_write_size = SMB21_DEFAULT_IOSIZE,
.max_trans_size = SMB21_DEFAULT_IOSIZE,
.max_credits = SMB2_MAX_CREDITS,
.large_lock_type = 0,
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
.shared_lock_type = SMB2_LOCKFLAG_SHARED,
@ -44,6 +45,7 @@ static struct smb_version_values smb30_server_values = {
.max_read_size = SMB3_DEFAULT_IOSIZE,
.max_write_size = SMB3_DEFAULT_IOSIZE,
.max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
.max_credits = SMB2_MAX_CREDITS,
.large_lock_type = 0,
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
.shared_lock_type = SMB2_LOCKFLAG_SHARED,
@ -70,6 +72,7 @@ static struct smb_version_values smb302_server_values = {
.max_read_size = SMB3_DEFAULT_IOSIZE,
.max_write_size = SMB3_DEFAULT_IOSIZE,
.max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
.max_credits = SMB2_MAX_CREDITS,
.large_lock_type = 0,
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
.shared_lock_type = SMB2_LOCKFLAG_SHARED,
@ -96,6 +99,7 @@ static struct smb_version_values smb311_server_values = {
.max_read_size = SMB3_DEFAULT_IOSIZE,
.max_write_size = SMB3_DEFAULT_IOSIZE,
.max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
.max_credits = SMB2_MAX_CREDITS,
.large_lock_type = 0,
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
.shared_lock_type = SMB2_LOCKFLAG_SHARED,
@ -197,7 +201,6 @@ void init_smb2_1_server(struct ksmbd_conn *conn)
conn->ops = &smb2_0_server_ops;
conn->cmds = smb2_0_server_cmds;
conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
conn->max_credits = SMB2_MAX_CREDITS;
conn->signing_algorithm = SIGNING_ALG_HMAC_SHA256_LE;
if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
@ -215,7 +218,6 @@ void init_smb3_0_server(struct ksmbd_conn *conn)
conn->ops = &smb3_0_server_ops;
conn->cmds = smb2_0_server_cmds;
conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
conn->max_credits = SMB2_MAX_CREDITS;
conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE;
if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
@ -240,7 +242,6 @@ void init_smb3_02_server(struct ksmbd_conn *conn)
conn->ops = &smb3_0_server_ops;
conn->cmds = smb2_0_server_cmds;
conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
conn->max_credits = SMB2_MAX_CREDITS;
conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE;
if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
@ -265,7 +266,6 @@ int init_smb3_11_server(struct ksmbd_conn *conn)
conn->ops = &smb3_11_server_ops;
conn->cmds = smb2_0_server_cmds;
conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
conn->max_credits = SMB2_MAX_CREDITS;
conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE;
if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
@ -304,3 +304,11 @@ void init_smb2_max_trans_size(unsigned int sz)
smb302_server_values.max_trans_size = sz;
smb311_server_values.max_trans_size = sz;
}
void init_smb2_max_credits(unsigned int sz)
{
smb21_server_values.max_credits = sz;
smb30_server_values.max_credits = sz;
smb302_server_values.max_credits = sz;
smb311_server_values.max_credits = sz;
}

8
fs/ksmbd/smb2pdu.c
View file

@ -308,7 +308,7 @@ int smb2_set_rsp_credits(struct ksmbd_work *work)
hdr->CreditCharge = req_hdr->CreditCharge;
if (conn->total_credits > conn->max_credits) {
if (conn->total_credits > conn->vals->max_credits) {
hdr->CreditRequest = 0;
pr_err("Total credits overflow: %d\n", conn->total_credits);
return -EINVAL;
@ -329,12 +329,12 @@ int smb2_set_rsp_credits(struct ksmbd_work *work)
if (hdr->Command == SMB2_NEGOTIATE)
aux_max = 0;
else
aux_max = conn->max_credits - credit_charge;
aux_max = conn->vals->max_credits - credit_charge;
aux_credits = min_t(unsigned short, aux_credits, aux_max);
credits_granted = credit_charge + aux_credits;
if (conn->max_credits - conn->total_credits < credits_granted)
credits_granted = conn->max_credits -
if (conn->vals->max_credits - conn->total_credits < credits_granted)
credits_granted = conn->vals->max_credits -
conn->total_credits;
conn->total_credits += credits_granted;

1
fs/ksmbd/smb2pdu.h
View file

@ -980,6 +980,7 @@ int init_smb3_11_server(struct ksmbd_conn *conn);
void init_smb2_max_read_size(unsigned int sz);
void init_smb2_max_write_size(unsigned int sz);
void init_smb2_max_trans_size(unsigned int sz);
void init_smb2_max_credits(unsigned int sz);
bool is_smb2_neg_cmd(struct ksmbd_work *work);
bool is_smb2_rsp(struct ksmbd_work *work);

1
fs/ksmbd/smb_common.h
View file

@ -365,6 +365,7 @@ struct smb_version_values {
__u32 max_read_size;
__u32 max_write_size;
__u32 max_trans_size;
__u32 max_credits;
__u32 large_lock_type;
__u32 exclusive_lock_type;
__u32 shared_lock_type;

2
fs/ksmbd/transport_ipc.c
View file

@ -301,6 +301,8 @@ static int ipc_server_config_on_startup(struct ksmbd_startup_request *req)
init_smb2_max_write_size(req->smb2_max_write);
if (req->smb2_max_trans)
init_smb2_max_trans_size(req->smb2_max_trans);
if (req->smb2_max_credits)
init_smb2_max_credits(req->smb2_max_credits);
ret = ksmbd_set_netbios_name(req->netbios_name);
ret |= ksmbd_set_server_string(req->server_string);