File kdump-sftp-data-transfer.patch of Package kdump

From: Petr Tesarik <ptesarik@suse.cz>
Date: Wed, 15 Apr 2015 12:22:49 +0200
Subject: Implement file data transfer over SFTP
References: FATE#318874, bsc#917747
Patch-mainline: v0.8.16
Git-commit: d9c2ad963e8a968076f002ef6745b706093ac7c3

This commit implements the actual write into the file.

Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
---
 kdumptool/sshtransfer.cc |   50 +++++++++++++++++++++++++++++++++++++++++++++++
 kdumptool/sshtransfer.h  |    3 ++
 2 files changed, 53 insertions(+)

--- a/kdumptool/sshtransfer.cc
+++ b/kdumptool/sshtransfer.cc
@@ -424,6 +424,28 @@ void SFTPTransfer::perform(DataProvider
 
     string handle = createfile(fp);
     try {
+	dataprovider->prepare();
+	ByteVector buffer(BUFSIZ);
+	off_t off = 0;
+	try {
+	    while (true) {
+		char *bufp = (char*) buffer.data();
+		size_t len = dataprovider->getData(bufp, buffer.size());
+
+		// finished?
+		if (len == 0)
+		    break;
+
+		buffer.resize(len);
+		writefile(handle, off, buffer);
+		off += buffer.size();
+		buffer.resize(buffer.capacity());
+	    }
+	} catch (...) {
+	    dataprovider->finish();
+	    throw;
+	}
+	dataprovider->finish();
     } catch (...) {
 	closefile(handle);
 	throw;
@@ -552,6 +574,34 @@ void SFTPTransfer::closefile(const std::
 		     Stringutil::number2string(unsigned(type)));
 
     unsigned long errcode = pkt.getInt32();
+    if (errcode != SSH_FX_OK)
+	throw KSFTPError("close failed on " + handle, errcode);
+}
+
+/* -------------------------------------------------------------------------- */
+void SFTPTransfer::writefile(const std::string &handle, off_t off,
+			     const ByteVector &data)
+{
+    SFTPPacket pkt;
+    pkt.addByte(SSH_FXP_WRITE);
+    pkt.addInt32(nextId());
+    pkt.addString(handle);
+    pkt.addInt64(off);
+    pkt.addInt32(data.size());
+    pkt.addByteVector(data);
+    sendPacket(pkt);
+
+    recvPacket(pkt);
+    unsigned char type = pkt.getByte();
+    unsigned long id = pkt.getInt32();
+    if (id != m_lastid)
+	throw KError("SFTP request/reply id mismatch");
+
+    if (type != SSH_FXP_STATUS)
+	throw KError("Invalid response to SSH_FXP_WRITE: type " +
+		     Stringutil::number2string(unsigned(type)));
+
+    unsigned long errcode = pkt.getInt32();
     if (errcode != SSH_FX_OK)
 	throw KSFTPError("close failed on " + handle, errcode);
 }
--- a/kdumptool/sshtransfer.h
+++ b/kdumptool/sshtransfer.h
@@ -124,6 +124,7 @@ enum {
     SSH_FXP_VERSION	=   2,
     SSH_FXP_OPEN	=   3,
     SSH_FXP_CLOSE	=   4,
+    SSH_FXP_WRITE	=   6,
     SSH_FXP_MKDIR	=  14,
     SSH_FXP_STAT	=  17,
     SSH_FXP_STATUS	= 101,
@@ -230,6 +231,8 @@ class SFTPTransfer : public URLTransfer
         void mkpath(const std::string &path);
 	std::string createfile(const std::string &file);
 	void closefile(const std::string &handle);
+	void writefile(const std::string &handle, off_t off,
+		       const ByteVector &data);
 
     private:
 	SubProcess m_process;