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ksmbd: fix wrong smbd max read/write size check

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smb-direct max read/write size can be different with smb2 max read/write
size. So smb2_read() can return error by wrong max read/write size check.
This patch use smb_direct_max_read_write_size for this check in
smb-direct read/write().

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Namjae Jeon 2022-05-16 16:23:28 +09:00 committed by Steve French
parent 65bb45b97b
commit 7a84399e1c
3 changed files with 32 additions and 14 deletions
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39
fs/ksmbd/smb2pdu.c
View file

@ -6183,6 +6183,8 @@ int smb2_read(struct ksmbd_work *work)
size_t length, mincount;
ssize_t nbytes = 0, remain_bytes = 0;
int err = 0;
bool is_rdma_channel = false;
unsigned int max_read_size = conn->vals->max_read_size;
WORK_BUFFERS(work, req, rsp);
@ -6194,6 +6196,11 @@ int smb2_read(struct ksmbd_work *work)
if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
req->Channel == SMB2_CHANNEL_RDMA_V1) {
is_rdma_channel = true;
max_read_size = get_smbd_max_read_write_size();
}
if (is_rdma_channel == true) {
unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
@ -6225,9 +6232,9 @@ int smb2_read(struct ksmbd_work *work)
length = le32_to_cpu(req->Length);
mincount = le32_to_cpu(req->MinimumCount);
if (length > conn->vals->max_read_size) {
if (length > max_read_size) {
ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
conn->vals->max_read_size);
max_read_size);
err = -EINVAL;
goto out;
}
@ -6259,8 +6266,7 @@ int smb2_read(struct ksmbd_work *work)
ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
nbytes, offset, mincount);
if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
req->Channel == SMB2_CHANNEL_RDMA_V1) {
if (is_rdma_channel == true) {
/* write data to the client using rdma channel */
remain_bytes = smb2_read_rdma_channel(work, req,
work->aux_payload_buf,
@ -6421,8 +6427,9 @@ int smb2_write(struct ksmbd_work *work)
size_t length;
ssize_t nbytes;
char *data_buf;
bool writethrough = false;
bool writethrough = false, is_rdma_channel = false;
int err = 0;
unsigned int max_write_size = work->conn->vals->max_write_size;
WORK_BUFFERS(work, req, rsp);
@ -6431,8 +6438,17 @@ int smb2_write(struct ksmbd_work *work)
return smb2_write_pipe(work);
}
offset = le64_to_cpu(req->Offset);
length = le32_to_cpu(req->Length);
if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
is_rdma_channel = true;
max_write_size = get_smbd_max_read_write_size();
length = le32_to_cpu(req->RemainingBytes);
}
if (is_rdma_channel == true) {
unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
if (req->Length != 0 || req->DataOffset != 0 ||
@ -6467,12 +6483,9 @@ int smb2_write(struct ksmbd_work *work)
goto out;
}
offset = le64_to_cpu(req->Offset);
length = le32_to_cpu(req->Length);
if (length > work->conn->vals->max_write_size) {
if (length > max_write_size) {
ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
work->conn->vals->max_write_size);
max_write_size);
err = -EINVAL;
goto out;
}
@ -6480,8 +6493,7 @@ int smb2_write(struct ksmbd_work *work)
if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
writethrough = true;
if (req->Channel != SMB2_CHANNEL_RDMA_V1 &&
req->Channel != SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
if (is_rdma_channel == false) {
if ((u64)le16_to_cpu(req->DataOffset) + length >
get_rfc1002_len(work->request_buf)) {
pr_err("invalid write data offset %u, smb_len %u\n",
@ -6507,8 +6519,7 @@ int smb2_write(struct ksmbd_work *work)
/* read data from the client using rdma channel, and
* write the data.
*/
nbytes = smb2_write_rdma_channel(work, req, fp, offset,
le32_to_cpu(req->RemainingBytes),
nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
writethrough);
if (nbytes < 0) {
err = (int)nbytes;

5
fs/ksmbd/transport_rdma.c
View file

@ -220,6 +220,11 @@ void init_smbd_max_io_size(unsigned int sz)
smb_direct_max_read_write_size = sz;
}
unsigned int get_smbd_max_read_write_size(void)
{
return smb_direct_max_read_write_size;
}
static inline int get_buf_page_count(void *buf, int size)
{
return DIV_ROUND_UP((uintptr_t)buf + size, PAGE_SIZE) -

2
fs/ksmbd/transport_rdma.h
View file

@ -57,11 +57,13 @@ int ksmbd_rdma_init(void);
void ksmbd_rdma_destroy(void);
bool ksmbd_rdma_capable_netdev(struct net_device *netdev);
void init_smbd_max_io_size(unsigned int sz);
unsigned int get_smbd_max_read_write_size(void);
#else
static inline int ksmbd_rdma_init(void) { return 0; }
static inline int ksmbd_rdma_destroy(void) { return 0; }
static inline bool ksmbd_rdma_capable_netdev(struct net_device *netdev) { return false; }
static inline void init_smbd_max_io_size(unsigned int sz) { }
static inline unsigned int get_smbd_max_read_write_size(void) { return 0; }
#endif
#endif /* __KSMBD_TRANSPORT_RDMA_H__ */