From 96b1046d1c68352677aa888cc110951a68daf155 Mon Sep 17 00:00:00 2001
From: Suriyan Ramasami <suriyan.r@gmail.com>
Date: Mon, 17 Nov 2014 14:39:37 -0800
Subject: sandbox: Prepare API change for files greater than 2GB

Change the internal sandbox functions to use loff_t for file offsets.

Signed-off-by: Suriyan Ramasami <suriyan.r@gmail.com>

Acked-by: Simon Glass <sjg@chromium.org>
---
 fs/sandbox/sandboxfs.c | 78 +++++++++++++++++++++++++++++++++++---------------
 1 file changed, 55 insertions(+), 23 deletions(-)

(limited to 'fs')

diff --git a/fs/sandbox/sandboxfs.c b/fs/sandbox/sandboxfs.c
index ba6402c81c..d11c087cc1 100644
--- a/fs/sandbox/sandboxfs.c
+++ b/fs/sandbox/sandboxfs.c
@@ -13,10 +13,10 @@ int sandbox_fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info)
 	return 0;
 }
 
-long sandbox_fs_read_at(const char *filename, unsigned long pos,
-			     void *buffer, unsigned long maxsize)
+int sandbox_fs_read_at(const char *filename, loff_t pos, void *buffer,
+		       loff_t maxsize, loff_t *actread)
 {
-	ssize_t size;
+	loff_t size;
 	int fd, ret;
 
 	fd = os_open(filename, OS_O_RDONLY);
@@ -27,16 +27,31 @@ long sandbox_fs_read_at(const char *filename, unsigned long pos,
 		os_close(fd);
 		return ret;
 	}
-	if (!maxsize)
-		maxsize = os_get_filesize(filename);
+	if (!maxsize) {
+		ret = os_get_filesize(filename, &size);
+		if (ret) {
+			os_close(fd);
+			return ret;
+		}
+
+		maxsize = size;
+	}
+
 	size = os_read(fd, buffer, maxsize);
 	os_close(fd);
 
-	return size;
+	if (size < 0) {
+		ret = -1;
+	} else {
+		ret = 0;
+		*actread = size;
+	}
+
+	return ret;
 }
 
-long sandbox_fs_write_at(const char *filename, unsigned long pos,
-			 void *buffer, unsigned long towrite)
+int sandbox_fs_write_at(const char *filename, loff_t pos, void *buffer,
+			loff_t towrite, loff_t *actwrite)
 {
 	ssize_t size;
 	int fd, ret;
@@ -52,7 +67,14 @@ long sandbox_fs_write_at(const char *filename, unsigned long pos,
 	size = os_write(fd, buffer, towrite);
 	os_close(fd);
 
-	return size;
+	if (size == -1) {
+		ret = -1;
+	} else {
+		ret = 0;
+		*actwrite = size;
+	}
+
+	return ret;
 }
 
 int sandbox_fs_ls(const char *dirname)
@@ -74,15 +96,23 @@ int sandbox_fs_ls(const char *dirname)
 
 int sandbox_fs_exists(const char *filename)
 {
-	ssize_t sz;
+	loff_t size;
+	int ret;
 
-	sz = os_get_filesize(filename);
-	return sz >= 0;
+	ret = os_get_filesize(filename, &size);
+	return ret == 0;
 }
 
 int sandbox_fs_size(const char *filename)
 {
-	return os_get_filesize(filename);
+	loff_t size;
+	int ret;
+
+	ret = os_get_filesize(filename, &size);
+	if (ret)
+		return ret;
+	else
+		return size;
 }
 
 void sandbox_fs_close(void)
@@ -91,26 +121,28 @@ void sandbox_fs_close(void)
 
 int fs_read_sandbox(const char *filename, void *buf, int offset, int len)
 {
-	int len_read;
+	int ret;
+	loff_t actread;
 
-	len_read = sandbox_fs_read_at(filename, offset, buf, len);
-	if (len_read == -1) {
+	ret = sandbox_fs_read_at(filename, offset, buf, len, &actread);
+	if (ret) {
 		printf("** Unable to read file %s **\n", filename);
-		return -1;
+		return ret;
 	}
 
-	return len_read;
+	return actread;
 }
 
 int fs_write_sandbox(const char *filename, void *buf, int offset, int len)
 {
-	int len_written;
+	int ret;
+	loff_t actwrite;
 
-	len_written = sandbox_fs_write_at(filename, offset, buf, len);
-	if (len_written == -1) {
+	ret = sandbox_fs_write_at(filename, offset, buf, len, &actwrite);
+	if (ret) {
 		printf("** Unable to write file %s **\n", filename);
-		return -1;
+		return ret;
 	}
 
-	return len_written;
+	return actwrite;
 }
-- 
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