Add missing avr prj to nightly test.

[bertos.git] / bertos / fs / battfs.c

diff --git a/bertos/fs/battfs.c b/bertos/fs/battfs.c
index 3bac5f08a2a79630f21ecb5d17ccdb977048139e..f40d310d8d3bae3d77f500dbd6640f30b9054700 100644 (file)
--- a/bertos/fs/battfs.c
+++ b/bertos/fs/battfs.c
@@ -32,7 +32,6 @@
  *
  * \brief BattFS: a filesystem for embedded platforms (implementation).
  *
- * \version $Id$
  *
  * \author Francesco Sacchi <batt@develer.com>
  *
@@ -367,6 +366,7 @@ bool battfs_mount(struct BattFsSuper *disk, struct KBlock *dev, pgcnt_t *page_ar
        pgoff_t filelen_table[BATTFS_MAX_FILES];
 
        ASSERT(dev);
+       ASSERT(kblock_partialWrite(dev));
        disk->dev = dev;
 
        ASSERT(disk->dev->blk_size > BATTFS_HEADER_LEN);
@@ -583,22 +583,33 @@ static size_t battfs_write(struct KFile *fd, const void *_buf, size_t size)
 
        if (fd->seek_pos > fd->size)
        {
-               // TODO: renew this last page only if needed
                if (!readHdr(disk, fdb->start[fdb->max_off], &curr_hdr))
                {
                        fdb->errors |= BATTFS_DISK_READ_ERR;
                        return total_write;
                }
 
-               new_page = renewPage(disk, fdb->start[fdb->max_off]);
-               if (new_page == NO_SPACE)
+               /*
+                * Renew page only if is not in cache.
+                * This avoids rewriting the same page continuously
+                * if the user code keeps writing in the same portion
+                * of the file.
+                */
+               if (kblock_buffered(disk->dev)
+                       && ((fdb->start[fdb->max_off] != kblock_cachedBlock(disk->dev)) || !kblock_cacheDirty(disk->dev)))
                {
-                       fdb->errors |= BATTFS_DISK_SPACEOVER_ERR;
-                       return total_write;
-               }
+                       new_page = renewPage(disk, fdb->start[fdb->max_off]);
+                       if (new_page == NO_SPACE)
+                       {
+                               fdb->errors |= BATTFS_DISK_SPACEOVER_ERR;
+                               return total_write;
+                       }
 
-               kblock_copy(disk->dev, fdb->start[fdb->max_off], new_page);
-               fdb->start[fdb->max_off] = new_page;
+                       kblock_copy(disk->dev, fdb->start[fdb->max_off], new_page);
+                       fdb->start[fdb->max_off] = new_page;
+               }
+               else
+                       new_page = fdb->start[fdb->max_off];
 
                /* Fill unused space of first page with 0s */
                uint8_t dummy = 0;
@@ -692,27 +703,37 @@ static size_t battfs_write(struct KFile *fd, const void *_buf, size_t size)
                }
                else
                {
-                       // TODO: do not renew page if its cached
                        if (!readHdr(disk, fdb->start[pg_offset], &curr_hdr))
                        {
                                fdb->errors |= BATTFS_DISK_READ_ERR;
                                return total_write;
                        }
 
-                       new_page = renewPage(disk, fdb->start[pg_offset]);
-                       if (new_page == NO_SPACE)
+                       /* Renew page only if is not in cache. */
+                       if (kblock_buffered(disk->dev)
+                               && ((fdb->start[fdb->max_off] != kblock_cachedBlock(disk->dev)) || !kblock_cacheDirty(disk->dev)))
                        {
-                               fdb->errors |= BATTFS_DISK_SPACEOVER_ERR;
-                               return total_write;
-                       }
+                               new_page = renewPage(disk, fdb->start[pg_offset]);
+                               if (new_page == NO_SPACE)
+                               {
+                                       fdb->errors |= BATTFS_DISK_SPACEOVER_ERR;
+                                       return total_write;
+                               }
 
-                       LOG_INFO("Re-writing page %d to %d\n", fdb->start[pg_offset], new_page);
-                       if (kblock_copy(disk->dev, fdb->start[pg_offset], new_page) != 0)
+                               LOG_INFO("Re-writing page %d to %d\n", fdb->start[pg_offset], new_page);
+                               if (kblock_copy(disk->dev, fdb->start[pg_offset], new_page) != 0)
+                               {
+                                       fdb->errors |= BATTFS_DISK_WRITE_ERR;
+                                       return total_write;
+                               }
+                               fdb->start[pg_offset] = new_page;
+                       }
+                       else
                        {
-                               fdb->errors |= BATTFS_DISK_WRITE_ERR;
-                               return total_write;
+                               LOG_INFO("Using cached block %d\n", fdb->start[pg_offset]);
+                               new_page = fdb->start[pg_offset];
                        }
-                       fdb->start[pg_offset] = new_page;
+
                        curr_hdr.seq++;
                }
                //LOG_INFO("writing to buffer for page %d, offset %d, size %d\n", disk->curr_page, addr_offset, wr_len);