From d7918a23986d28fe85d4ecb6021b40969036557c Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Tue, 20 Apr 2021 22:15:00 +0000
Subject: driver: support directory recursion (in write and copy mode).

---
 src/driver/tpax_driver_ctx.c    | 35 +++++++++++++++++++++++++++++++----
 src/internal/tpax_driver_impl.h | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/driver/tpax_driver_ctx.c b/src/driver/tpax_driver_ctx.c
index 7557ace..fa3a930 100644
--- a/src/driver/tpax_driver_ctx.c
+++ b/src/driver/tpax_driver_ctx.c
@@ -289,11 +289,24 @@ static struct tpax_driver_ctx_impl * tpax_driver_ctx_alloc(
 			PROT_READ|PROT_WRITE,
 			MAP_PRIVATE|MAP_ANONYMOUS,
 			-1,0);
-	}
 
-	if (ictx->ctx.bufaddr == MAP_FAILED) {
-		ictx->ctx.bufaddr = 0;
-		ictx->ctx.bufsize = 0;
+		if (ictx->ctx.bufaddr == MAP_FAILED) {
+			free(ictx);
+			return 0;
+		}
+
+		if (cctx->drvflags & TPAX_DRIVER_DIR_MEMBER_RECURSE)
+			ictx->ctx.dirbuff = mmap(
+				0,TPAX_DIRENT_BUFLEN,
+				PROT_READ|PROT_WRITE,
+				MAP_PRIVATE|MAP_ANONYMOUS,
+				-1,0);
+
+		if (ictx->ctx.dirbuff == MAP_FAILED) {
+			munmap(ictx->ctx.bufaddr,ictx->ctx.bufsize);
+			free(ictx);
+			return 0;
+		}
 	}
 
 	ictx->ctx.ctx.units = ictx->units;
@@ -552,9 +565,23 @@ int tpax_get_driver_ctx(
 
 static void tpax_free_driver_ctx_impl(struct tpax_driver_ctx_alloc * ictx)
 {
+	void *  next;
+	size_t  size;
+
+	for (; ictx->ctx.dirents; ) {
+		next = ictx->ctx.dirents->next;
+		size = ictx->ctx.dirents->size;
+
+		munmap(ictx->ctx.dirents,size);
+		ictx->ctx.dirents = (struct tpax_dirent_buffer *)next;
+	}
+
 	if (ictx->ctx.bufaddr)
 		munmap(ictx->ctx.bufaddr,ictx->ctx.bufsize);
 
+	if (ictx->ctx.dirbuff)
+		munmap(ictx->ctx.dirbuff,TPAX_DIRENT_BUFLEN);
+
 	argv_free(ictx->meta);
 	free(ictx);
 }
diff --git a/src/internal/tpax_driver_impl.h b/src/internal/tpax_driver_impl.h
index 4003305..47d8fd5 100644
--- a/src/internal/tpax_driver_impl.h
+++ b/src/internal/tpax_driver_impl.h
@@ -8,6 +8,7 @@
 #define TPAX_DRIVER_IMPL_H
 
 #include <stdint.h>
+#include <dirent.h>
 #include <stdio.h>
 #include <sys/stat.h>
 #include <sys/types.h>
@@ -18,6 +19,7 @@
 #include "argv/argv.h"
 
 #define TPAX_OPTV_ELEMENTS 64
+#define TPAX_DIRENT_BUFLEN 65536
 
 #define TPAX_DRIVER_EXEC_MODE_WRITE_COPY \
 	(TPAX_DRIVER_EXEC_MODE_WRITE |    \
@@ -40,6 +42,22 @@ enum app_tags {
 	TAG_PURE_PATH,
 };
 
+struct tpax_dirent {
+	int                           fdat;
+	int                           depth;
+	size_t                        nsize;
+	const struct tpax_dirent *    parent;
+	struct dirent                 dirent;
+};
+
+struct tpax_dirent_buffer {
+	struct tpax_dirent_buffer *   next;
+	size_t                        size;
+	size_t                        nfree;
+	struct tpax_dirent *          cdent;
+	struct tpax_dirent            dbuf[];
+};
+
 struct tpax_driver_ctx_impl {
 	struct tpax_common_ctx        cctx;
 	struct tpax_driver_ctx        ctx;
@@ -50,6 +68,8 @@ struct tpax_driver_ctx_impl {
 	struct tpax_error_info **     erricap;
 	struct tpax_error_info *      erriptr[64];
 	struct tpax_error_info        erribuf[64];
+	struct tpax_dirent_buffer *   dirents;
+	void *                        dirbuff;
 	void *                        bufaddr;
 	size_t                        bufsize;
 	off_t                         cpos;
@@ -103,6 +123,13 @@ static inline void * tpax_get_driver_anon_map_addr(
 	return ictx->bufaddr;
 }
 
+static inline void * tpax_get_driver_getdents_buffer(
+	const struct tpax_driver_ctx * dctx)
+{
+	struct tpax_driver_ctx_impl * ictx = tpax_get_driver_ictx(dctx);
+	return ictx->dirbuff;
+}
+
 static inline void tpax_driver_set_ectx(
 	const struct tpax_driver_ctx * dctx,
 	const struct tpax_unit_ctx *   uctx,
@@ -171,6 +198,13 @@ static inline void tpax_set_driver_cpos(const struct tpax_driver_ctx * dctx, off
 	ictx->cpos = cpos;
 }
 
+static inline struct tpax_dirent_buffer * tpax_get_driver_dirents(const struct tpax_driver_ctx * dctx)
+{
+	struct tpax_driver_ctx_impl * ictx;
+	ictx = tpax_get_driver_ictx(dctx);
+	return ictx->dirents;
+}
+
 static inline off_t tpax_get_unit_hpos(const struct tpax_unit_ctx * uctx)
 {
 	struct tpax_unit_ctx_impl * ictx;
-- 
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