The Samba-Bugzilla – Attachment 8737 Details for
Bug 9412
SMB2 server doesn't support recvfile.
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[patch]
git-am fix for master and 4.0.next
recvfile-4.0-master.patchset (text/plain), 18.48 KB, created by
Jeremy Allison
on 2013-04-08 19:45:40 UTC
(
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Description:
git-am fix for master and 4.0.next
Filename:
MIME Type:
Creator:
Jeremy Allison
Created:
2013-04-08 19:45:40 UTC
Size:
18.48 KB
patch
obsolete
>From bfd489407abf5083cd58605038e529bf6023e7f6 Mon Sep 17 00:00:00 2001 >From: Jeremy Allison <jra@samba.org> >Date: Mon, 18 Mar 2013 12:00:25 -0700 >Subject: [PATCH 01/13] Ensure we don't do an SMB2 aio write if RECVFILE is > active. > >Signed-off-by: Jeremy Allison <jra@samba.org> >--- > source3/smbd/aio.c | 5 +++++ > 1 file changed, 5 insertions(+) > >diff --git a/source3/smbd/aio.c b/source3/smbd/aio.c >index 3f553eb..e8be408 100644 >--- a/source3/smbd/aio.c >+++ b/source3/smbd/aio.c >@@ -861,6 +861,11 @@ NTSTATUS schedule_aio_smb2_write(connection_struct *conn, > return NT_STATUS_RETRY; > } > >+ if (smbreq->unread_bytes) { >+ /* Can't do async with recvfile. */ >+ return NT_STATUS_RETRY; >+ } >+ > if (!(aio_ex = create_aio_extra(smbreq->smb2req, fsp, 0))) { > return NT_STATUS_NO_MEMORY; > } >-- >1.8.1.3 > > >From 35b384c0c4d6c60a3c5bea386296570e78a83d1a Mon Sep 17 00:00:00 2001 >From: Jeremy Allison <jra@samba.org> >Date: Tue, 19 Mar 2013 12:16:32 -0700 >Subject: [PATCH 02/13] If we already have an smb1req attached to the struct > smbd_smb2_request, don't recreate it. > >Signed-off-by: Jeremy Allison <jra@samba.org> >--- > source3/smbd/smb2_glue.c | 10 +++++++--- > 1 file changed, 7 insertions(+), 3 deletions(-) > >diff --git a/source3/smbd/smb2_glue.c b/source3/smbd/smb2_glue.c >index 1b2b4dd..9fc1e49 100644 >--- a/source3/smbd/smb2_glue.c >+++ b/source3/smbd/smb2_glue.c >@@ -28,9 +28,13 @@ struct smb_request *smbd_smb2_fake_smb_request(struct smbd_smb2_request *req) > struct smb_request *smbreq; > const uint8_t *inhdr = SMBD_SMB2_IN_HDR_PTR(req); > >- smbreq = talloc_zero(req, struct smb_request); >- if (smbreq == NULL) { >- return NULL; >+ if (req->smb1req) { >+ smbreq = req->smb1req; >+ } else { >+ smbreq = talloc_zero(req, struct smb_request); >+ if (smbreq == NULL) { >+ return NULL; >+ } > } > > smbreq->request_time = req->request_time; >-- >1.8.1.3 > > >From ba4ec4874d3aa6fa483f7962fb39d926b4a7a950 Mon Sep 17 00:00:00 2001 >From: Jeremy Allison <jra@samba.org> >Date: Tue, 19 Mar 2013 12:24:17 -0700 >Subject: [PATCH 03/13] Add function smbd_smb2_unread_bytes(). > >Returns number of bytes left to read for recvfile. Will be >used in SMB_2_WRITE_FILE code path. > >Signed-off-by: Jeremy Allison <jra@samba.org> >--- > source3/smbd/globals.h | 1 + > source3/smbd/smb2_glue.c | 12 ++++++++++++ > 2 files changed, 13 insertions(+) > >diff --git a/source3/smbd/globals.h b/source3/smbd/globals.h >index 3461bc5..a0a04bb 100644 >--- a/source3/smbd/globals.h >+++ b/source3/smbd/globals.h >@@ -247,6 +247,7 @@ NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req, > uint32_t defer_time); > > struct smb_request *smbd_smb2_fake_smb_request(struct smbd_smb2_request *req); >+size_t smbd_smb2_unread_bytes(struct smbd_smb2_request *req); > void remove_smb2_chained_fsp(files_struct *fsp); > > NTSTATUS smbd_smb2_request_verify_creditcharge(struct smbd_smb2_request *req, >diff --git a/source3/smbd/smb2_glue.c b/source3/smbd/smb2_glue.c >index 9fc1e49..54135b5 100644 >--- a/source3/smbd/smb2_glue.c >+++ b/source3/smbd/smb2_glue.c >@@ -59,6 +59,18 @@ struct smb_request *smbd_smb2_fake_smb_request(struct smbd_smb2_request *req) > } > > /********************************************************* >+ Are there unread bytes for recvfile ? >+*********************************************************/ >+ >+size_t smbd_smb2_unread_bytes(struct smbd_smb2_request *req) >+{ >+ if (req->smb1req) { >+ return req->smb1req->unread_bytes; >+ } >+ return 0; >+} >+ >+/********************************************************* > Called from file_free() to remove any chained fsp pointers. > *********************************************************/ > >-- >1.8.1.3 > > >From 53e52c2e5c32d51fd3d71ce69fdf447ba1c50bdd Mon Sep 17 00:00:00 2001 >From: Jeremy Allison <jra@samba.org> >Date: Tue, 19 Mar 2013 12:36:52 -0700 >Subject: [PATCH 04/13] Allow smbd_smb2_request_error_ex() to cope with unread > bytes on error. > >Drain the socket if a RECVFILE write failed. > >Signed-off-by: Jeremy Allison <jra@samba.org> >--- > source3/smbd/smb2_server.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) > >diff --git a/source3/smbd/smb2_server.c b/source3/smbd/smb2_server.c >index eb7059e..7eb62fc 100644 >--- a/source3/smbd/smb2_server.c >+++ b/source3/smbd/smb2_server.c >@@ -2621,11 +2621,21 @@ NTSTATUS smbd_smb2_request_error_ex(struct smbd_smb2_request *req, > { > DATA_BLOB body; > uint8_t *outhdr = SMBD_SMB2_OUT_HDR_PTR(req); >+ size_t unread_bytes = smbd_smb2_unread_bytes(req); > > DEBUG(10,("smbd_smb2_request_error_ex: idx[%d] status[%s] |%s| at %s\n", > req->current_idx, nt_errstr(status), info ? " +info" : "", > location)); > >+ if (unread_bytes) { >+ /* Recvfile error. Drain incoming socket. */ >+ size_t ret = drain_socket(req->sconn->sock, unread_bytes); >+ if (ret != unread_bytes) { >+ smbd_server_connection_terminate(req->sconn, >+ "Failed to drain SMB2 socket\n"); >+ } >+ } >+ > body.data = outhdr + SMB2_HDR_BODY; > body.length = 8; > SSVAL(body.data, 0, 9); >-- >1.8.1.3 > > >From b3073bcba6638456556694b311fe874bb8ff4c8a Mon Sep 17 00:00:00 2001 >From: Jeremy Allison <jra@samba.org> >Date: Mon, 1 Apr 2013 13:12:55 -0700 >Subject: [PATCH 05/13] Add utility function get_min_receive_file_size(). > >Signed-off-by: Jeremy Allison <jra@samba.org> >--- > source3/smbd/smb2_server.c | 11 +++++++++++ > 1 file changed, 11 insertions(+) > >diff --git a/source3/smbd/smb2_server.c b/source3/smbd/smb2_server.c >index 7eb62fc..1c622a8 100644 >--- a/source3/smbd/smb2_server.c >+++ b/source3/smbd/smb2_server.c >@@ -2842,6 +2842,17 @@ static int smbd_smb2_request_next_vector(struct tstream_context *stream, > size_t *_count); > static void smbd_smb2_request_read_done(struct tevent_req *subreq); > >+static size_t get_min_receive_file_size(struct smbd_smb2_request *smb2_req) >+{ >+ if (smb2_req->do_signing) { >+ return 0; >+ } >+ if (smb2_req->do_encryption) { >+ return 0; >+ } >+ return (size_t)lp_min_receive_file_size(); >+} >+ > static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx, > struct tevent_context *ev, > struct smbd_server_connection *sconn) >-- >1.8.1.3 > > >From fd95f9c131dd3926d6dc38b67713d3c3068dc64d Mon Sep 17 00:00:00 2001 >From: Jeremy Allison <jra@samba.org> >Date: Mon, 1 Apr 2013 13:14:13 -0700 >Subject: [PATCH 06/13] Add macro SMBD_SMB2_SHORT_RECEIVEFILE_WRITE_LEN. > >This is the 'short' length we'll read in the SMB2_WRITE receivefile >code path. > >Signed-off-by: Jeremy Allison <jra@samba.org> >--- > source3/smbd/globals.h | 2 ++ > 1 file changed, 2 insertions(+) > >diff --git a/source3/smbd/globals.h b/source3/smbd/globals.h >index a0a04bb..f075a6d 100644 >--- a/source3/smbd/globals.h >+++ b/source3/smbd/globals.h >@@ -546,6 +546,8 @@ struct smbd_smb2_request { > #define SMBD_SMB2_OUT_DYN_PTR(req) (uint8_t *)(SMBD_SMB2_OUT_DYN_IOV(req)->iov_base) > #define SMBD_SMB2_OUT_DYN_LEN(req) (SMBD_SMB2_OUT_DYN_IOV(req)->iov_len) > >+#define SMBD_SMB2_SHORT_RECEIVEFILE_WRITE_LEN (SMB2_HDR_BODY + 0x30) >+ > struct { > /* > * vector[0] TRANSPORT HEADER (empty) >-- >1.8.1.3 > > >From b84a813f4b757dfa8f9b77aaedd321d5410cf4e4 Mon Sep 17 00:00:00 2001 >From: Jeremy Allison <jra@samba.org> >Date: Mon, 1 Apr 2013 13:17:09 -0700 >Subject: [PATCH 07/13] Add extra fields into struct > smbd_smb2_request_read_state to support receivefile. > >Initialize min_recv_size with the size that will trigger the >receivefile write path. > >Signed-off-by: Jeremy Allison <jra@samba.org> >--- > source3/smbd/smb2_server.c | 3 +++ > 1 file changed, 3 insertions(+) > >diff --git a/source3/smbd/smb2_server.c b/source3/smbd/smb2_server.c >index 1c622a8..e1671a7 100644 >--- a/source3/smbd/smb2_server.c >+++ b/source3/smbd/smb2_server.c >@@ -2831,6 +2831,8 @@ struct smbd_smb2_request_read_state { > uint8_t nbt[NBT_HDR_SIZE]; > bool done; > } hdr; >+ bool doing_receivefile; >+ size_t min_recv_size; > size_t pktlen; > uint8_t *pktbuf; > }; >@@ -2874,6 +2876,7 @@ static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx, > return tevent_req_post(req, ev); > } > state->smb2_req->sconn = sconn; >+ state->min_recv_size = get_min_receive_file_size(state->smb2_req); > > subreq = tstream_readv_pdu_queue_send(state->smb2_req, > state->ev, >-- >1.8.1.3 > > >From fe8205f24291936d2385f55296c53fcca68d02bb Mon Sep 17 00:00:00 2001 >From: Jeremy Allison <jra@samba.org> >Date: Mon, 1 Apr 2013 13:19:01 -0700 >Subject: [PATCH 08/13] Add stub static function that will turn on/off > receivefile code path. > >Signed-off-by: Jeremy Allison <jra@samba.org> >--- > source3/smbd/smb2_server.c | 5 +++++ > 1 file changed, 5 insertions(+) > >diff --git a/source3/smbd/smb2_server.c b/source3/smbd/smb2_server.c >index e1671a7..a983dcd 100644 >--- a/source3/smbd/smb2_server.c >+++ b/source3/smbd/smb2_server.c >@@ -2892,6 +2892,11 @@ static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx, > return req; > } > >+static bool is_smb2_recvfile_write(struct smbd_smb2_request_read_state *state) >+{ >+ return false; >+} >+ > static int smbd_smb2_request_next_vector(struct tstream_context *stream, > void *private_data, > TALLOC_CTX *mem_ctx, >-- >1.8.1.3 > > >From 48383d003e6dd3efd411b67fbdbed8054b5608a7 Mon Sep 17 00:00:00 2001 >From: Jeremy Allison <jra@samba.org> >Date: Mon, 1 Apr 2013 13:24:07 -0700 >Subject: [PATCH 09/13] The guts of the receivefile code changes. > >If an incoming PDU might qualify, only read >SMBD_SMB2_SHORT_RECEIVEFILE_WRITE_LEN = (SMB2_HEADER + SMB2_WRITE_BODY_LEN) >bytes rather than the whole PDU. > >Next time we're called, use is_smb2_recvfile_write() to decide if >this is an SMB2_WRITE that fit the receivefile criteria, otherwise >just read the rest of the PDU. > >If we did do a short receivefile read, set up the smb2_req->smb1req->unread_bytes >value to show what bytes remain in the TCP buffers. > >Signed-off-by: Jeremy Allison <jra@samba.org> >--- > source3/smbd/smb2_server.c | 65 ++++++++++++++++++++++++++++++++++++++++++---- > 1 file changed, 60 insertions(+), 5 deletions(-) > >diff --git a/source3/smbd/smb2_server.c b/source3/smbd/smb2_server.c >index a983dcd..226db15 100644 >--- a/source3/smbd/smb2_server.c >+++ b/source3/smbd/smb2_server.c >@@ -2906,12 +2906,38 @@ static int smbd_smb2_request_next_vector(struct tstream_context *stream, > struct smbd_smb2_request_read_state *state = > talloc_get_type_abort(private_data, > struct smbd_smb2_request_read_state); >- struct iovec *vector; >+ struct iovec *vector = NULL; >+ size_t min_recvfile_size = UINT32_MAX; > > if (state->pktlen > 0) { >- /* if there're no remaining bytes, we're done */ >- *_vector = NULL; >- *_count = 0; >+ if (state->doing_receivefile && !is_smb2_recvfile_write(state)) { >+ /* >+ * Not a possible receivefile write. >+ * Read the rest of the data. >+ */ >+ state->doing_receivefile = false; >+ vector = talloc_array(mem_ctx, struct iovec, 1); >+ if (vector == NULL) { >+ return -1; >+ } >+ vector[0].iov_base = (void *)(state->pktbuf + >+ SMBD_SMB2_SHORT_RECEIVEFILE_WRITE_LEN); >+ vector[0].iov_len = (state->pktlen - >+ SMBD_SMB2_SHORT_RECEIVEFILE_WRITE_LEN); >+ *_vector = vector; >+ *_count = 1; >+ } else { >+ /* >+ * Either this is a receivefile write so we've >+ * done a short read, or if not we have all the data. >+ * Either way, we're done and >+ * smbd_smb2_request_read_done() will handle >+ * and short read case by looking at the >+ * state->doing_receivefile value. >+ */ >+ *_vector = NULL; >+ *_count = 0; >+ } > return 0; > } > >@@ -2957,7 +2983,26 @@ static int smbd_smb2_request_next_vector(struct tstream_context *stream, > } > > vector[0].iov_base = (void *)state->pktbuf; >- vector[0].iov_len = state->pktlen; >+ >+ if (state->min_recv_size != 0) { >+ min_recvfile_size = SMBD_SMB2_SHORT_RECEIVEFILE_WRITE_LEN; >+ min_recvfile_size += state->min_recv_size; >+ } >+ >+ if (state->pktlen > min_recvfile_size) { >+ /* >+ * Might be a receivefile write. Read the SMB2 HEADER + >+ * SMB2_WRITE header first. Set 'doing_receivefile' >+ * as we're *attempting* receivefile write. If this >+ * turns out not to be a SMB2_WRITE request or otherwise >+ * not suitable then we'll just read the rest of the data >+ * the next time this function is called. >+ */ >+ vector[0].iov_len = SMBD_SMB2_SHORT_RECEIVEFILE_WRITE_LEN; >+ state->doing_receivefile = true; >+ } else { >+ vector[0].iov_len = state->pktlen; >+ } > > *_vector = vector; > *_count = 1; >@@ -3020,6 +3065,16 @@ static void smbd_smb2_request_read_done(struct tevent_req *subreq) > return; > } > >+ if (state->doing_receivefile) { >+ state->smb2_req->smb1req = talloc_zero(state->smb2_req, >+ struct smb_request); >+ if (tevent_req_nomem(state->smb2_req->smb1req, req)) { >+ return; >+ } >+ state->smb2_req->smb1req->unread_bytes = >+ state->pktlen - SMBD_SMB2_SHORT_RECEIVEFILE_WRITE_LEN; >+ } >+ > state->smb2_req->current_idx = 1; > > tevent_req_done(req); >-- >1.8.1.3 > > >From 9ce62cc107fb46b17d05c2f841ac97c2f5e455dc Mon Sep 17 00:00:00 2001 >From: Jeremy Allison <jra@samba.org> >Date: Mon, 1 Apr 2013 11:16:01 -0700 >Subject: [PATCH 10/13] Add the internals of is_smb2_recvfile_write. > >This turns on the real receivefile detection, and completes >the receivefile code path changes. > >Signed-off-by: Jeremy Allison <jra@samba.org> >--- > source3/smbd/smb2_server.c | 38 +++++++++++++++++++++++++++++++++++++- > 1 file changed, 37 insertions(+), 1 deletion(-) > >diff --git a/source3/smbd/smb2_server.c b/source3/smbd/smb2_server.c >index 226db15..57e9c7b 100644 >--- a/source3/smbd/smb2_server.c >+++ b/source3/smbd/smb2_server.c >@@ -2894,7 +2894,43 @@ static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx, > > static bool is_smb2_recvfile_write(struct smbd_smb2_request_read_state *state) > { >- return false; >+ uint32_t flags; >+ >+ if (IVAL(state->pktbuf, 0) == SMB2_TF_MAGIC) { >+ /* Transform header. Cannot recvfile. */ >+ return false; >+ } >+ if (IVAL(state->pktbuf, 0) != SMB2_MAGIC) { >+ /* Not SMB2. Normal error path will cope. */ >+ return false; >+ } >+ if (SVAL(state->pktbuf, 4) != SMB2_HDR_BODY) { >+ /* Not SMB2. Normal error path will cope. */ >+ return false; >+ } >+ if (SVAL(state->pktbuf, SMB2_HDR_OPCODE) != SMB2_OP_WRITE) { >+ /* Needs to be a WRITE. */ >+ return false; >+ } >+ if (IVAL(state->pktbuf, SMB2_HDR_NEXT_COMMAND) != 0) { >+ /* Chained. Cannot recvfile. */ >+ return false; >+ } >+ flags = IVAL(state->pktbuf, SMB2_HDR_FLAGS); >+ if (flags & SMB2_HDR_FLAG_CHAINED) { >+ /* Chained. Cannot recvfile. */ >+ return false; >+ } >+ if (flags & SMB2_HDR_FLAG_SIGNED) { >+ /* Signed. Cannot recvfile. */ >+ return false; >+ } >+ >+ DEBUG(10,("Doing recvfile write len = %u\n", >+ (unsigned int)(state->pktlen - >+ SMBD_SMB2_SHORT_RECEIVEFILE_WRITE_LEN))); >+ >+ return true; > } > > static int smbd_smb2_request_next_vector(struct tstream_context *stream, >-- >1.8.1.3 > > >From 04aeb6d8a75e48a5db818940e668d6442c440913 Mon Sep 17 00:00:00 2001 >From: Jeremy Allison <jra@samba.org> >Date: Mon, 8 Apr 2013 10:16:48 -0700 >Subject: [PATCH 11/13] Ensure drain_socket() operates on a blocking socket. > >Signed-off-by: Jeremy Allison <jra@samba.org> >--- > source3/lib/recvfile.c | 17 +++++++++++++++-- > 1 file changed, 15 insertions(+), 2 deletions(-) > >diff --git a/source3/lib/recvfile.c b/source3/lib/recvfile.c >index c53ba77..72f4257 100644 >--- a/source3/lib/recvfile.c >+++ b/source3/lib/recvfile.c >@@ -240,6 +240,7 @@ ssize_t sys_recvfile(int fromfd, > /***************************************************************** > Throw away "count" bytes from the client socket. > Returns count or -1 on error. >+ Must only operate on a blocking socket. > *****************************************************************/ > > ssize_t drain_socket(int sockfd, size_t count) >@@ -247,6 +248,7 @@ ssize_t drain_socket(int sockfd, size_t count) > size_t total = 0; > size_t bufsize = MIN(TRANSFER_BUF_SIZE,count); > char *buffer = NULL; >+ int old_flags = 0; > > if (count == 0) { > return 0; >@@ -257,6 +259,12 @@ ssize_t drain_socket(int sockfd, size_t count) > return -1; > } > >+ old_flags = fcntl(sockfd, F_GETFL, 0); >+ if (set_blocking(sockfd, true) == -1) { >+ free(buffer); >+ return -1; >+ } >+ > while (total < count) { > ssize_t read_ret; > size_t toread = MIN(bufsize,count - total); >@@ -265,12 +273,17 @@ ssize_t drain_socket(int sockfd, size_t count) > read_ret = sys_read(sockfd, buffer, toread); > if (read_ret <= 0) { > /* EOF or socket error. */ >- free(buffer); >- return -1; >+ count = (size_t)-1; >+ goto out; > } > total += read_ret; > } > >+ out: >+ > free(buffer); >+ if (fcntl(sockfd, F_SETFL, old_flags) == -1) { >+ return -1; >+ } > return count; > } >-- >1.8.1.3 > > >From d7a185d9cc5d2e7d08b27c3b622cacf38d140983 Mon Sep 17 00:00:00 2001 >From: Jeremy Allison <jra@samba.org> >Date: Mon, 8 Apr 2013 10:32:10 -0700 >Subject: [PATCH 12/13] Ensure the RECVFILE path in vfs_write_data() operates > on a blocking socket. > >Signed-off-by: Jeremy Allison <jra@samba.org> >--- > source3/smbd/vfs.c | 13 ++++++++++++- > 1 file changed, 12 insertions(+), 1 deletion(-) > >diff --git a/source3/smbd/vfs.c b/source3/smbd/vfs.c >index b81e8de..ddac7d9 100644 >--- a/source3/smbd/vfs.c >+++ b/source3/smbd/vfs.c >@@ -428,14 +428,25 @@ ssize_t vfs_write_data(struct smb_request *req, > ssize_t ret; > > if (req && req->unread_bytes) { >+ int sockfd = req->sconn->sock; >+ int old_flags; > SMB_ASSERT(req->unread_bytes == N); > /* VFS_RECVFILE must drain the socket > * before returning. */ > req->unread_bytes = 0; >- return SMB_VFS_RECVFILE(req->sconn->sock, >+ /* Ensure the socket is blocking. */ >+ old_flags = fcntl(sockfd, F_GETFL, 0); >+ if (set_blocking(sockfd, true) == -1) { >+ return (ssize_t)-1; >+ } >+ ret = SMB_VFS_RECVFILE(sockfd, > fsp, > (off_t)-1, > N); >+ if (fcntl(sockfd, F_SETFL, old_flags) == -1) { >+ return (ssize_t)-1; >+ } >+ return ret; > } > > while (total < N) { >-- >1.8.1.3 > > >From 3062bc0dc530612258b0625b96b07117082e4227 Mon Sep 17 00:00:00 2001 >From: Jeremy Allison <jra@samba.org> >Date: Mon, 8 Apr 2013 10:49:03 -0700 >Subject: [PATCH 13/13] Ensure the RECVFILE path in vfs_pwrite_data() operates > on a blocking socket. > >Signed-off-by: Jeremy Allison <jra@samba.org> >--- > source3/smbd/vfs.c | 13 ++++++++++++- > 1 file changed, 12 insertions(+), 1 deletion(-) > >diff --git a/source3/smbd/vfs.c b/source3/smbd/vfs.c >index ddac7d9..7f67af7 100644 >--- a/source3/smbd/vfs.c >+++ b/source3/smbd/vfs.c >@@ -472,14 +472,25 @@ ssize_t vfs_pwrite_data(struct smb_request *req, > ssize_t ret; > > if (req && req->unread_bytes) { >+ int sockfd = req->sconn->sock; >+ int old_flags; > SMB_ASSERT(req->unread_bytes == N); > /* VFS_RECVFILE must drain the socket > * before returning. */ > req->unread_bytes = 0; >- return SMB_VFS_RECVFILE(req->sconn->sock, >+ /* Ensure the socket is blocking. */ >+ old_flags = fcntl(sockfd, F_GETFL, 0); >+ if (set_blocking(sockfd, true) == -1) { >+ return (ssize_t)-1; >+ } >+ ret = SMB_VFS_RECVFILE(sockfd, > fsp, > offset, > N); >+ if (fcntl(sockfd, F_SETFL, old_flags) == -1) { >+ return (ssize_t)-1; >+ } >+ return ret; > } > > while (total < N) { >-- >1.8.1.3 >
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