disk->data_size now hold the space size usable by data inside a page.

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

diff --git a/bertos/fs/battfs.c b/bertos/fs/battfs.c
index ca13600caf6ff7933d684bde3f59830e35a5bde3..87b540197661745f445983e9e149f09a179458be 100644 (file)
--- a/bertos/fs/battfs.c
+++ b/bertos/fs/battfs.c
@@ -155,7 +155,7 @@ static bool readHdr(struct BattFsSuper *disk, pgcnt_t page, struct BattFsPageHea
         * Header is actually a footer, and so
         * resides at page end.
         */
-       if (diskRead(disk, page, disk->page_size - BATTFS_HEADER_LEN, buf, BATTFS_HEADER_LEN)
+       if (diskRead(disk, page, disk->data_size, buf, BATTFS_HEADER_LEN)
            != BATTFS_HEADER_LEN)
        {
                LOG_ERR("page[%d]\n", page);
@@ -186,7 +186,7 @@ static bool setBufferHdr(struct BattFsSuper *disk, struct BattFsPageHeader *hdr)
         * Header is actually a footer, and so
         * resides at page end.
         */
-       if (disk->bufferWrite(disk, disk->page_size - BATTFS_HEADER_LEN, buf, BATTFS_HEADER_LEN)
+       if (disk->bufferWrite(disk, disk->data_size, buf, BATTFS_HEADER_LEN)
            != BATTFS_HEADER_LEN)
        {
                LOG_ERR("writing to buffer\n");
@@ -199,7 +199,7 @@ static bool getBufferHdr(struct BattFsSuper *disk, struct BattFsPageHeader *hdr)
 {
        uint8_t buf[BATTFS_HEADER_LEN];
 
-       if (disk->bufferRead(disk, disk->page_size - BATTFS_HEADER_LEN, buf, BATTFS_HEADER_LEN)
+       if (disk->bufferRead(disk, disk->data_size, buf, BATTFS_HEADER_LEN)
            != BATTFS_HEADER_LEN)
        {
                LOG_ERR("reading from buffer\n");
@@ -264,12 +264,12 @@ static bool countDiskFilePages(struct BattFsSuper *disk, pgoff_t *filelen_table)
                        return false;
 
                /* Increase free space */
-               disk->free_bytes += disk->page_size - BATTFS_HEADER_LEN;
+               disk->free_bytes += disk->data_size;
 
                /* Check header FCS */
                if (hdr.fcs == computeFcs(&hdr))
                {
-                       ASSERT(hdr.fill <= disk->page_size - BATTFS_HEADER_LEN);
+                       ASSERT(hdr.fill <= disk->data_size);
 
                        /* Page is valid and is owned by a file */
                        filelen_table[hdr.inode]++;
@@ -460,7 +460,9 @@ bool battfs_init(struct BattFsSuper *disk)
        ASSERT(disk->save);
        ASSERT(disk->erase);
        ASSERT(disk->close);
-       ASSERT(disk->page_size);
+       ASSERT(disk->page_size > BATTFS_HEADER_LEN);
+       /* Fill page_size with the usable space */
+       disk->data_size = disk->page_size - BATTFS_HEADER_LEN;
        ASSERT(disk->page_count);
        ASSERT(disk->page_count < PAGE_UNSET_SENTINEL - 1);
        ASSERT(disk->page_array);
@@ -468,7 +470,7 @@ bool battfs_init(struct BattFsSuper *disk)
        memset(filelen_table, 0, BATTFS_MAX_FILES * sizeof(pgoff_t));
 
        disk->free_bytes = 0;
-       disk->disk_size = (disk_size_t)(disk->page_size - BATTFS_HEADER_LEN) * disk->page_count;
+       disk->disk_size = (disk_size_t)disk->data_size * disk->page_count;
 
        /* Initialize page buffer cache */
        disk->cache_dirty = false;
@@ -587,13 +589,13 @@ static size_t battfs_write(struct KFile *fd, const void *_buf, size_t size)
        if (fd->seek_pos < 0)
                return total_write;
 
-       if ((fd->seek_pos / (fdb->disk->page_size - BATTFS_HEADER_LEN)) > fdb->max_off)
+       if ((fd->seek_pos / fdb->disk->data_size) > fdb->max_off)
        {
                /*
                 * Handle writing when seek pos if far over EOF,
                 * We need to allocate the missing pages first.
                 */
-               pgoff_t missing_pages = fd->seek_pos / (fdb->disk->page_size - BATTFS_HEADER_LEN) - fdb->max_off;
+               pgoff_t missing_pages = fd->seek_pos / fdb->disk->data_size - fdb->max_off;
 
                LOG_INFO("missing pages: %d\n", missing_pages);
                if (!loadPage(fdb->disk, fdb->start[fdb->max_off], &curr_hdr))
@@ -607,18 +609,18 @@ static size_t battfs_write(struct KFile *fd, const void *_buf, size_t size)
                while (missing_pages--)
                {
                        /* Update size and free space left */
-                       fd->size += (fdb->disk->page_size - BATTFS_HEADER_LEN) - curr_hdr.fill;
-                       fdb->disk->free_bytes -= (fdb->disk->page_size - BATTFS_HEADER_LEN) - curr_hdr.fill;
+                       fd->size += fdb->disk->data_size - curr_hdr.fill;
+                       fdb->disk->free_bytes -= fdb->disk->data_size - curr_hdr.fill;
 
                        /* Fill empty space with 0xFF */
-                       for (addr_offset = curr_hdr.fill; addr_offset < (fdb->disk->page_size - BATTFS_HEADER_LEN); addr_offset++)
+                       for (addr_offset = curr_hdr.fill; addr_offset < fdb->disk->data_size; addr_offset++)
                        {
                                if (fdb->disk->bufferWrite(fdb->disk, addr_offset, &dummy, 1) != 1)
                                {
                                        #warning TODO set error?
                                }
                        }
-                       curr_hdr.fill = (fdb->disk->page_size - BATTFS_HEADER_LEN);
+                       curr_hdr.fill = fdb->disk->data_size;
                        setBufferHdr(fdb->disk, &curr_hdr);
 
                        /* Get the new page needed */
@@ -628,7 +630,7 @@ static size_t battfs_write(struct KFile *fd, const void *_buf, size_t size)
                        fdb->max_off++;
                }
                /* Fix sizes for the last new page (could be only partially full) */
-               curr_hdr.fill = fd->seek_pos % (fdb->disk->page_size - BATTFS_HEADER_LEN);
+               curr_hdr.fill = fd->seek_pos % fdb->disk->data_size;
                setBufferHdr(fdb->disk, &curr_hdr);
                fd->size += curr_hdr.fill;
                fdb->disk->free_bytes -= curr_hdr.fill;
@@ -638,9 +640,9 @@ static size_t battfs_write(struct KFile *fd, const void *_buf, size_t size)
 
        while (size)
        {
-               pg_offset = fd->seek_pos / (fdb->disk->page_size - BATTFS_HEADER_LEN);
-               addr_offset = fd->seek_pos % (fdb->disk->page_size - BATTFS_HEADER_LEN);
-               wr_len = MIN(size, (size_t)(fdb->disk->page_size - BATTFS_HEADER_LEN - addr_offset));
+               pg_offset = fd->seek_pos / fdb->disk->data_size;
+               addr_offset = fd->seek_pos % fdb->disk->data_size;
+               wr_len = MIN(size, (size_t)(fdb->disk->data_size - addr_offset));
 
                /* Handle write outside EOF */
                if (pg_offset > fdb->max_off)
@@ -719,9 +721,9 @@ static size_t battfs_read(struct KFile *fd, void *_buf, size_t size)
 
        while (size)
        {
-               pg_offset = fd->seek_pos / (fdb->disk->page_size - BATTFS_HEADER_LEN);
-               addr_offset = fd->seek_pos % (fdb->disk->page_size - BATTFS_HEADER_LEN);
-               read_len = MIN(size, (size_t)(fdb->disk->page_size - BATTFS_HEADER_LEN - addr_offset));
+               pg_offset = fd->seek_pos / fdb->disk->data_size;
+               addr_offset = fd->seek_pos % fdb->disk->data_size;
+               read_len = MIN(size, (size_t)(fdb->disk->data_size - addr_offset));
 
                //LOG_INFO("reading from page %d, offset %d, size %d\n", fdb->start[pg_offset], addr_offset, read_len);
                /* Read from disk */
@@ -843,7 +845,7 @@ bool battfs_fileopen(BattFsSuper *disk, BattFs *fd, inode_t inode, filemode_t mo
        /* Fill file size */
        if ((fd->fd.size = countFileSize(disk, fd->start, inode)) == EOF)
                return false;
-       fd->max_off = fd->fd.size / (disk->page_size - BATTFS_HEADER_LEN);
+       fd->max_off = fd->fd.size / disk->data_size;
 
        /* Reset seek position */
        fd->fd.seek_pos = 0;