X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=yaffs_guts.c;h=df6cb001995f0cdc1d7364c9d5b51221dd274008;hp=146fb2b75ca5a7f3ae78cedd6cfda356da4d61dd;hb=d9cae0a277c62c660e4802d3b8745500583273da;hpb=b4d93e23d5d94ff4de6c5d1f420153661fc6a0b3

diff --git a/yaffs_guts.c b/yaffs_guts.c
index 146fb2b..df6cb00 100644
--- a/yaffs_guts.c
+++ b/yaffs_guts.c
@@ -44,8 +44,8 @@ static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk,
 
 /* Function to calculate chunk and offset */
 
-static inline void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr,
-					int *chunk_out, u32 *offset_out)
+void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr,
+				int *chunk_out, u32 *offset_out)
 {
 	int chunk;
 	u32 offset;
@@ -177,7 +177,8 @@ void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer)
 
 	if (buffer) {
 		/* assume it is an unmanaged one. */
-		yaffs_trace(YAFFS_TRACE_BUFFERS, "Releasing unmanaged temp buffer");
+		yaffs_trace(YAFFS_TRACE_BUFFERS,
+			"Releasing unmanaged temp buffer");
 		kfree(buffer);
 		dev->unmanaged_buffer_deallocs++;
 	}
@@ -280,7 +281,8 @@ static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk,
 
 static inline int yaffs_hash_fn(int n)
 {
-	n = abs(n);
+	if (n < 0)
+		n = -n;
 	return n % YAFFS_NOBJECT_BUCKETS;
 }
 
@@ -696,6 +698,11 @@ void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj,
 #endif
 }
 
+loff_t yaffs_max_file_size(struct yaffs_dev *dev)
+{
+	return ((loff_t) YAFFS_MAX_CHUNK_ID) * dev->data_bytes_per_chunk;
+}
+
 /*-------------------- TNODES -------------------
 
  * List of spare tnodes
@@ -1953,7 +1960,8 @@ struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number,
 	case YAFFS_OBJECT_TYPE_FILE:
 		the_obj->variant.file_variant.file_size = 0;
 		the_obj->variant.file_variant.scanned_size = 0;
-		the_obj->variant.file_variant.shrink_size = ~0; /* max */
+		the_obj->variant.file_variant.shrink_size =
+						yaffs_max_file_size(dev);
 		the_obj->variant.file_variant.top_level = 0;
 		the_obj->variant.file_variant.top = tn;
 		break;
@@ -2381,7 +2389,7 @@ void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no)
 	bi->has_shrink_hdr = 0;
 	bi->skip_erased_check = 1;	/* Clean, so no need to check */
 	bi->gc_prioritise = 0;
-	bi->has_summary=0;
+	bi->has_summary = 0;
 
 	yaffs_clear_chunk_bits(dev, block_no);
 
@@ -2496,7 +2504,7 @@ static inline int yaffs_gc_process_chunk(struct yaffs_dev *dev,
 
 			/* Update file size */
 			if (object->variant_type == YAFFS_OBJECT_TYPE_FILE) {
-				yaffs_oh_size_load( oh,
+				yaffs_oh_size_load(oh,
 				    object->variant.file_variant.file_size);
 				tags.extra_file_size =
 				    object->variant.file_variant.file_size;
@@ -3339,8 +3347,8 @@ int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name, int force,
 		break;
 	case YAFFS_OBJECT_TYPE_FILE:
 		if (oh->parent_obj_id != YAFFS_OBJECTID_DELETED &&
-		     oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED)
-		     file_size = in->variant.file_variant.file_size;
+		    oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED)
+			file_size = in->variant.file_variant.file_size;
 		yaffs_oh_size_load(oh, file_size);
 		break;
 	case YAFFS_OBJECT_TYPE_HARDLINK:
@@ -3504,7 +3512,7 @@ int yaffs_file_rd(struct yaffs_obj *in, u8 * buffer, loff_t offset, int n_bytes)
 }
 
 int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
-		     int n_bytes, int write_trhrough)
+		     int n_bytes, int write_through)
 {
 
 	int chunk;
@@ -3513,10 +3521,10 @@ int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
 	int n = n_bytes;
 	int n_done = 0;
 	int n_writeback;
-	int start_write = offset;
+	loff_t start_write = offset;
 	int chunk_written = 0;
 	u32 n_bytes_read;
-	u32 chunk_start;
+	loff_t chunk_start;
 	struct yaffs_dev *dev;
 
 	dev = in->my_dev;
@@ -3524,11 +3532,12 @@ int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
 	while (n > 0 && chunk_written >= 0) {
 		yaffs_addr_to_chunk(dev, offset, &chunk, &start);
 
-		if (chunk * dev->data_bytes_per_chunk + start != offset ||
+		if (((loff_t)chunk) *
+		    dev->data_bytes_per_chunk + start != offset ||
 		    start >= dev->data_bytes_per_chunk) {
 			yaffs_trace(YAFFS_TRACE_ERROR,
-				"AddrToChunk of offset %d gives chunk %d start %d",
-				(int)offset, chunk, start);
+				"AddrToChunk of offset %lld gives chunk %d start %d",
+				offset, chunk, start);
 		}
 		chunk++;	/* File pos to chunk in file offset */
 
@@ -3545,7 +3554,8 @@ int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
 			 * before.
 			 */
 
-			chunk_start = ((chunk - 1) * dev->data_bytes_per_chunk);
+			chunk_start = (((loff_t)(chunk - 1)) *
+					dev->data_bytes_per_chunk);
 
 			if (chunk_start > in->variant.file_variant.file_size)
 				n_bytes_read = 0;	/* Past end of file */
@@ -3613,7 +3623,7 @@ int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
 					cache->locked = 0;
 					cache->n_bytes = n_writeback;
 
-					if (write_trhrough) {
+					if (write_through) {
 						chunk_written =
 						    yaffs_wr_data_obj
 						    (cache->object,
@@ -3673,25 +3683,34 @@ int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
 }
 
 int yaffs_wr_file(struct yaffs_obj *in, const u8 *buffer, loff_t offset,
-		  int n_bytes, int write_trhrough)
+		  int n_bytes, int write_through)
 {
 	yaffs2_handle_hole(in, offset);
-	return yaffs_do_file_wr(in, buffer, offset, n_bytes, write_trhrough);
+	return yaffs_do_file_wr(in, buffer, offset, n_bytes, write_through);
 }
 
 /* ---------------------- File resizing stuff ------------------ */
 
-static void yaffs_prune_chunks(struct yaffs_obj *in, int new_size)
+static void yaffs_prune_chunks(struct yaffs_obj *in, loff_t new_size)
 {
 
 	struct yaffs_dev *dev = in->my_dev;
-	int old_size = in->variant.file_variant.file_size;
+	loff_t old_size = in->variant.file_variant.file_size;
 	int i;
 	int chunk_id;
-	int last_del = 1 + (old_size - 1) / dev->data_bytes_per_chunk;
-	int start_del = 1 + (new_size + dev->data_bytes_per_chunk - 1) /
-	    dev->data_bytes_per_chunk;
+	u32 dummy;
+	int last_del;
+	int start_del;
 
+	if (old_size > 0)
+		yaffs_addr_to_chunk(dev, old_size - 1, &last_del, &dummy);
+	else
+		last_del = 0;
+
+	yaffs_addr_to_chunk(dev, new_size + dev->data_bytes_per_chunk - 1,
+				&start_del, &dummy);
+	last_del++;
+	start_del++;
 
 	/* Delete backwards so that we don't end up with holes if
 	 * power is lost part-way through the operation.
@@ -4355,7 +4374,7 @@ struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *directory,
 			 */
 			yaffs_get_obj_name(l, buffer,
 				YAFFS_MAX_NAME_LENGTH + 1);
-			if (strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
+			if (!strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH))
 				return l;
 		}
 	}
@@ -4815,7 +4834,7 @@ int yaffs_guts_initialise(struct yaffs_dev *dev)
 	if (!init_failed && !yaffs_create_initial_dir(dev))
 		init_failed = 1;
 
-	if(!init_failed && dev->param.is_yaffs2 &&
+	if (!init_failed && dev->param.is_yaffs2 &&
 		!dev->param.disable_summary &&
 		!yaffs_summary_init(dev))
 		init_failed = 1;
@@ -5001,7 +5020,13 @@ void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize)
 
 loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh)
 {
-	loff_t retval = (((loff_t) oh->file_size_high) << 32) |
+	loff_t retval;
+
+	if (~(oh->file_size_high))
+		retval = (((loff_t) oh->file_size_high) << 32) |
 			(((loff_t) oh->file_size_low) & 0xFFFFFFFF);
+	else
+		retval = (loff_t) oh->file_size_low;
+
 	return retval;
 }