yaffsfs: Allocate directory searches from a table rather than via malloc.

[yaffs2.git] / yaffs_guts.c

diff --git a/yaffs_guts.c b/yaffs_guts.c
index 79a798808c56660f8bbe223d90b2a2e9e1488d1e..8acb59ba655bae1b3029c037e14acc1dd4e70a03 100644 (file)
--- a/yaffs_guts.c
+++ b/yaffs_guts.c
@@ -280,7 +280,8 @@ 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 +697,11 @@ 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 +1959,8 @@ 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;
@@ -3504,7 +3511,7 @@ 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 +3520,10 @@ 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 +3531,11 @@ 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 +3552,7 @@ 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 +3620,7 @@ 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 +3680,34 @@ 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.
@@ -5002,7 +5018,7 @@ 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;
-       
+
        if(~(oh->file_size_high))
                retval = (((loff_t) oh->file_size_high) << 32) |
                        (((loff_t) oh->file_size_low) & 0xFFFFFFFF);