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s3:smb2_server: generate a header blob for the sendfile path

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We need to pass the NBT header, SMB2 header and SMB2 Read header
as header blob to SMB_VFS_SENDFILE(). This allows the usage
of MSG_SEND or other tricks to avoid multiple TCP packets
on the wire.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
This commit is contained in:
Stefan Metzmacher 2013-10-14 14:18:26 +02:00
parent 9d33a3f3e8
commit 36efaac259
3 changed files with 40 additions and 5 deletions
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1
source3/smbd/globals.h
View File

@ -470,6 +470,7 @@ NTSTATUS smbXsrv_open_cleanup(uint64_t persistent_id);
struct smbd_smb2_send_queue {
struct smbd_smb2_send_queue *prev, *next;
DATA_BLOB *sendfile_header;
struct iovec *vector;
int count;

10
source3/smbd/smb2_read.c
View File

@ -166,6 +166,7 @@ struct smbd_smb2_read_state {
uint32_t in_length;
uint64_t in_offset;
uint32_t in_minimum;
DATA_BLOB out_headers;
DATA_BLOB out_data;
uint32_t out_remaining;
};
@ -180,10 +181,10 @@ static int smb2_sendfile_send_data(struct smbd_smb2_read_state *state)
ssize_t nread;
nread = SMB_VFS_SENDFILE(fsp->conn->sconn->sock,
fsp,
NULL,
in_offset,
in_length);
fsp,
state->smb2req->queue_entry.sendfile_header,
in_offset,
in_length);
DEBUG(10,("smb2_sendfile_send_data: SMB_VFS_SENDFILE returned %d on file %s\n",
(int)nread,
fsp_str_dbg(fsp) ));
@ -301,6 +302,7 @@ static NTSTATUS schedule_smb2_sendfile_read(struct smbd_smb2_request *smb2req,
}
*state_copy = *state;
talloc_set_destructor(state_copy, smb2_sendfile_send_data);
state->smb2req->queue_entry.sendfile_header = &state_copy->out_headers;
return NT_STATUS_OK;
}

34
source3/smbd/smb2_server.c
View File

@ -2680,7 +2680,7 @@ NTSTATUS smbd_smb2_send_oplock_break(struct smbd_server_connection *sconn,
do_encryption = true;
}
state = talloc(sconn, struct smbd_smb2_send_oplock_break_state);
state = talloc_zero(sconn, struct smbd_smb2_send_oplock_break_state);
if (state == NULL) {
return NT_STATUS_NO_MEMORY;
}
@ -2983,6 +2983,38 @@ static NTSTATUS smbd_smb2_flush_send_queue(struct smbd_server_connection *sconn)
while (sconn->smb2.send_queue != NULL) {
struct smbd_smb2_send_queue *e = sconn->smb2.send_queue;
if (e->sendfile_header != NULL) {
size_t size = 0;
size_t i = 0;
uint8_t *buf;
for (i=0; i < e->count; i++) {
size += e->vector[i].iov_len;
}
buf = talloc_array(e->mem_ctx, uint8_t, size);
if (buf == NULL) {
return NT_STATUS_NO_MEMORY;
}
size = 0;
for (i=0; i < e->count; i++) {
memcpy(buf+size,
e->vector[i].iov_base,
e->vector[i].iov_len);
size += e->vector[i].iov_len;
}
e->sendfile_header->data = buf;
e->sendfile_header->length = size;
e->count = 0;
sconn->smb2.send_queue_len--;
DLIST_REMOVE(sconn->smb2.send_queue, e);
talloc_free(e->mem_ctx);
continue;
}
ret = writev(sconn->sock, e->vector, e->count);
if (ret == 0) {
/* propagate end of file */