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-rw-r--r--source3/smbd/smb2_read.c111
1 files changed, 75 insertions, 36 deletions
diff --git a/source3/smbd/smb2_read.c b/source3/smbd/smb2_read.c
index b29da4a356..3e1162fb92 100644
--- a/source3/smbd/smb2_read.c
+++ b/source3/smbd/smb2_read.c
@@ -170,12 +170,67 @@ static void smbd_smb2_request_read_done(struct tevent_req *subreq)
struct smbd_smb2_read_state {
struct smbd_smb2_request *smb2req;
+ files_struct *fsp;
+ uint32_t in_length;
+ uint64_t in_offset;
+ uint32_t in_minimum;
DATA_BLOB out_data;
uint32_t out_remaining;
};
static void smbd_smb2_read_pipe_done(struct tevent_req *subreq);
+/*******************************************************************
+ Common read complete processing function for both synchronous and
+ asynchronous reads.
+*******************************************************************/
+
+NTSTATUS smb2_read_complete(struct tevent_req *req, ssize_t nread, int err)
+{
+ struct smbd_smb2_read_state *state = tevent_req_data(req,
+ struct smbd_smb2_read_state);
+ files_struct *fsp = state->fsp;
+
+ if (nread < 0) {
+ NTSTATUS status = map_nt_error_from_unix(err);
+
+ DEBUG( 3,( "smb2_read_complete: file %s nread = %d. "
+ "Error = %s (NTSTATUS %s)\n",
+ fsp_str_dbg(fsp),
+ (int)nread,
+ strerror(err),
+ nt_errstr(status)));
+
+ return status;
+ }
+ if (nread == 0 && state->in_length != 0) {
+ DEBUG(5,("smb2_read_complete: read_file[%s] end of file\n",
+ fsp_str_dbg(fsp)));
+ return NT_STATUS_END_OF_FILE;
+ }
+
+ if (nread < state->in_minimum) {
+ DEBUG(5,("smb2_read_complete: read_file[%s] read less %d than "
+ "minimum requested %u. Returning end of file\n",
+ fsp_str_dbg(fsp),
+ (int)nread,
+ (unsigned int)state->in_minimum));
+ return NT_STATUS_END_OF_FILE;
+ }
+
+ DEBUG(3,("smbd_smb2_read: fnum=[%d/%s] length=%lu offset=%lu read=%lu\n",
+ fsp->fnum,
+ fsp_str_dbg(fsp),
+ (unsigned long)state->in_length,
+ (unsigned long)state->in_offset,
+ (unsigned long)nread));
+
+ state->out_data.length = nread;
+ state->out_remaining = 0;
+
+ return NT_STATUS_OK;
+}
+
static struct tevent_req *smbd_smb2_read_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbd_smb2_request *smb2req,
@@ -186,13 +241,15 @@ static struct tevent_req *smbd_smb2_read_send(TALLOC_CTX *mem_ctx,
uint32_t in_minimum,
uint32_t in_remaining)
{
- struct tevent_req *req;
- struct smbd_smb2_read_state *state;
- struct smb_request *smbreq;
+ NTSTATUS status;
+ struct tevent_req *req = NULL;
+ struct smbd_smb2_read_state *state = NULL;
+ struct smb_request *smbreq = NULL;
connection_struct *conn = smb2req->tcon->compat_conn;
- files_struct *fsp;
+ files_struct *fsp = NULL;
ssize_t nread = -1;
struct lock_struct lock;
+ int saved_errno;
req = tevent_req_create(mem_ctx, &state,
struct smbd_smb2_read_state);
@@ -200,6 +257,9 @@ static struct tevent_req *smbd_smb2_read_send(TALLOC_CTX *mem_ctx,
return NULL;
}
state->smb2req = smb2req;
+ state->in_length = in_length;
+ state->in_offset = in_offset;
+ state->in_minimum = in_minimum;
state->out_data = data_blob_null;
state->out_remaining = 0;
@@ -234,8 +294,10 @@ static struct tevent_req *smbd_smb2_read_send(TALLOC_CTX *mem_ctx,
return tevent_req_post(req, ev);
}
+ state->fsp = fsp;
+
if (IS_IPC(smbreq->conn)) {
- struct tevent_req *subreq;
+ struct tevent_req *subreq = NULL;
if (!fsp_is_np(fsp)) {
tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
@@ -277,6 +339,8 @@ static struct tevent_req *smbd_smb2_read_send(TALLOC_CTX *mem_ctx,
in_offset,
in_length);
+ saved_errno = errno;
+
SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock);
DEBUG(10,("smbd_smb2_read: file %s handle [0x%016llX] offset=%llu "
@@ -287,38 +351,13 @@ static struct tevent_req *smbd_smb2_read_send(TALLOC_CTX *mem_ctx,
(unsigned long long)in_length,
(long long)nread));
- if (nread < 0) {
- DEBUG(5,("smbd_smb2_read: read_file[%s] nread[%lld]\n",
- fsp_str_dbg(fsp), (long long)nread));
- tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
- return tevent_req_post(req, ev);
- }
- if (nread == 0 && in_length != 0) {
- DEBUG(5,("smbd_smb2_read: read_file[%s] end of file\n",
- fsp_str_dbg(fsp)));
- tevent_req_nterror(req, NT_STATUS_END_OF_FILE);
- return tevent_req_post(req, ev);
- }
-
- if (nread < in_minimum) {
- DEBUG(5,("smbd_smb2_read: read_file[%s] read less %d than "
- "minimum requested %u. Returning end of file\n",
- fsp_str_dbg(fsp),
- (int)nread,
- (unsigned int)in_minimum));
- tevent_req_nterror(req, NT_STATUS_END_OF_FILE);
- return tevent_req_post(req, ev);
+ status = smb2_read_complete(req, nread, saved_errno);
+ if (!NT_STATUS_IS_OK(status)) {
+ tevent_req_nterror(req, status);
+ } else {
+ /* Success. */
+ tevent_req_done(req);
}
-
- DEBUG(3,("smbd_smb2_read: fnum=[%d/%s] length=%lu offset=%lu read=%lu\n",
- fsp->fnum, fsp_str_dbg(fsp),
- (unsigned long)in_length,
- (unsigned long)in_offset,
- (unsigned long)nread));
-
- state->out_data.length = nread;
- state->out_remaining = 0;
- tevent_req_done(req);
return tevent_req_post(req, ev);
}