X-Git-Url: https://git.wh0rd.org/?p=dump.git;a=blobdiff_plain;f=common%2Fslave.h;fp=common%2Fslave.h;h=cd05d6d90bfc868a4190c67e41ec4febd3a613fc;hp=0000000000000000000000000000000000000000;hb=70deb804d2211535f1f188a14e8fc867db9c6625;hpb=e3956dfb7715a21919aa66dd4209a2dc1c3c82da

diff --git a/common/slave.h b/common/slave.h
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+++ b/common/slave.h
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+
+/*
+ * Structures pulled from dump/tape.c. We need it here so the 'archive' code can
+ * determine where we are in the tape.
+ */
+#ifndef _SLAVE_H
+#define _SLAVE_H 1
+
+/*
+ * Concurrent dump mods (Caltech) - disk block reading and tape writing
+ * are exported to several slave processes.  While one slave writes the
+ * tape, the others read disk blocks; they pass control of the tape in
+ * a ring via signals. The parent process traverses the filesystem and
+ * sends writeheader()'s and lists of daddr's to the slaves via pipes.
+ * The following structure defines the instruction packets sent to slaves.
+ */
+struct req {
+	ext2_loff_t dblk;
+	int count;
+};
+
+#define SLAVES 3		/* 1 slave writing, 1 reading, 1 for slack */
+
+struct slave {
+	int tapea;		/* header number at start of this chunk */
+	int count;		/* count to next header (used for TS_TAPE */
+				/* after EOT) */
+	int inode;		/* inode that we are currently dealing with */
+	int fd;			/* FD for this slave */
+	int pid;		/* PID for this slave */
+	int sent;		/* 1 == we've sent this slave requests */
+	int firstrec;		/* record number of this block */
+	char (*tblock)[TP_BSIZE]; /* buffer for data blocks */
+	struct req *req;	/* buffer for requests */
+};
+
+extern struct slave *slp;
+
+#endif