[PATCH] Create asm-generic/fcntl.h

[linux-2.6] / fs / jffs2 / scan.c

diff --git a/fs/jffs2/scan.c b/fs/jffs2/scan.c
index ded53584a897dff6d0e93f3d005222288b442d6c..b63160f83bab8fe693d23025f275157840b0f2d6 100644 (file)
--- a/fs/jffs2/scan.c
+++ b/fs/jffs2/scan.c
@@ -7,7 +7,7 @@
  *
  * For licensing information, see the file 'LICENCE' in this directory.
  *
- * $Id: scan.c,v 1.115 2004/11/17 12:59:08 dedekind Exp $
+ * $Id: scan.c,v 1.119 2005/02/17 17:51:13 dedekind Exp $
  *
  */
 #include <linux/kernel.h>
@@ -19,7 +19,7 @@
 #include <linux/compiler.h>
 #include "nodelist.h"
 
-#define EMPTY_SCAN_SIZE 1024
+#define DEFAULT_EMPTY_SCAN_SIZE 1024
 
 #define DIRTY_SPACE(x) do { typeof(x) _x = (x); \
                c->free_size -= _x; c->dirty_size += _x; \
@@ -68,13 +68,21 @@ static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblo
 static inline int min_free(struct jffs2_sb_info *c)
 {
        uint32_t min = 2 * sizeof(struct jffs2_raw_inode);
-#if defined CONFIG_JFFS2_FS_NAND || defined CONFIG_JFFS2_FS_NOR_ECC
+#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
        if (!jffs2_can_mark_obsolete(c) && min < c->wbuf_pagesize)
                return c->wbuf_pagesize;
 #endif
        return min;
 
 }
+
+static inline uint32_t EMPTY_SCAN_SIZE(uint32_t sector_size) {
+       if (sector_size < DEFAULT_EMPTY_SCAN_SIZE)
+               return sector_size;
+       else
+               return DEFAULT_EMPTY_SCAN_SIZE;
+}
+
 int jffs2_scan_medium(struct jffs2_sb_info *c)
 {
        int i, ret;
@@ -220,7 +228,7 @@ int jffs2_scan_medium(struct jffs2_sb_info *c)
                c->dirty_size -= c->nextblock->dirty_size;
                c->nextblock->dirty_size = 0;
        }
-#if defined CONFIG_JFFS2_FS_NAND || defined CONFIG_JFFS2_FS_NOR_ECC
+#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
        if (!jffs2_can_mark_obsolete(c) && c->nextblock && (c->nextblock->free_size & (c->wbuf_pagesize-1))) {
                /* If we're going to start writing into a block which already 
                   contains data, and the end of the data isn't page-aligned,
@@ -286,7 +294,7 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo
        uint32_t hdr_crc, buf_ofs, buf_len;
        int err;
        int noise = 0;
-#ifdef CONFIG_JFFS2_FS_NAND
+#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
        int cleanmarkerfound = 0;
 #endif
 
@@ -295,7 +303,7 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo
 
        D1(printk(KERN_DEBUG "jffs2_scan_eraseblock(): Scanning block at 0x%x\n", ofs));
 
-#ifdef CONFIG_JFFS2_FS_NAND
+#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
        if (jffs2_cleanmarker_oob(c)) {
                int ret = jffs2_check_nand_cleanmarker(c, jeb);
                D2(printk(KERN_NOTICE "jffs_check_nand_cleanmarker returned %d\n",ret));
@@ -316,7 +324,7 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo
        if (!buf_size) {
                buf_len = c->sector_size;
        } else {
-               buf_len = EMPTY_SCAN_SIZE;
+               buf_len = EMPTY_SCAN_SIZE(c->sector_size);
                err = jffs2_fill_scan_buf(c, buf, buf_ofs, buf_len);
                if (err)
                        return err;
@@ -326,11 +334,11 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo
        ofs = 0;
 
        /* Scan only 4KiB of 0xFF before declaring it's empty */
-       while(ofs < EMPTY_SCAN_SIZE && *(uint32_t *)(&buf[ofs]) == 0xFFFFFFFF)
+       while(ofs < EMPTY_SCAN_SIZE(c->sector_size) && *(uint32_t *)(&buf[ofs]) == 0xFFFFFFFF)
                ofs += 4;
 
-       if (ofs == EMPTY_SCAN_SIZE) {
-#ifdef CONFIG_JFFS2_FS_NAND
+       if (ofs == EMPTY_SCAN_SIZE(c->sector_size)) {
+#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
                if (jffs2_cleanmarker_oob(c)) {
                        /* scan oob, take care of cleanmarker */
                        int ret = jffs2_check_oob_empty(c, jeb, cleanmarkerfound);
@@ -343,7 +351,10 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo
                }
 #endif
                D1(printk(KERN_DEBUG "Block at 0x%08x is empty (erased)\n", jeb->offset));
-               return BLK_STATE_ALLFF; /* OK to erase if all blocks are like this */
+               if (c->cleanmarker_size == 0)
+                       return BLK_STATE_CLEANMARKER;   /* don't bother with re-erase */
+               else
+                       return BLK_STATE_ALLFF; /* OK to erase if all blocks are like this */
        }
        if (ofs) {
                D1(printk(KERN_DEBUG "Free space at %08x ends at %08x\n", jeb->offset,
@@ -422,8 +433,8 @@ scan_more:
                        /* If we're only checking the beginning of a block with a cleanmarker,
                           bail now */
                        if (buf_ofs == jeb->offset && jeb->used_size == PAD(c->cleanmarker_size) && 
-                           c->cleanmarker_size && !jeb->dirty_size && !jeb->first_node->next_in_ino) {
-                               D1(printk(KERN_DEBUG "%d bytes at start of block seems clean... assuming all clean\n", EMPTY_SCAN_SIZE));
+                           c->cleanmarker_size && !jeb->dirty_size && !jeb->first_node->next_phys) {
+                               D1(printk(KERN_DEBUG "%d bytes at start of block seems clean... assuming all clean\n", EMPTY_SCAN_SIZE(c->sector_size)));
                                return BLK_STATE_CLEANMARKER;
                        }
 
@@ -618,7 +629,7 @@ scan_more:
        }
 
        if ((jeb->used_size + jeb->unchecked_size) == PAD(c->cleanmarker_size) && !jeb->dirty_size 
-               && (!jeb->first_node || !jeb->first_node->next_in_ino) )
+               && (!jeb->first_node || !jeb->first_node->next_phys) )
                return BLK_STATE_CLEANMARKER;
                
        /* move blocks with max 4 byte dirty space to cleanlist */