*
* 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 1.116 2005/02/09 09:09:02 pavlov Exp $
*
*/
#include <linux/kernel.h>
#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; \
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;
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;
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) {
+ if (ofs == EMPTY_SCAN_SIZE(c->sector_size)) {
#ifdef CONFIG_JFFS2_FS_NAND
if (jffs2_cleanmarker_oob(c)) {
/* scan oob, take care of 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));
+ 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;
}
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: wbuf.c,v 1.86 2005/02/05 18:23:37 hammache Exp $
+ * $Id: wbuf.c,v 1.87 2005/02/09 09:09:02 pavlov Exp $
*
*/
int ret;
size_t retlen;
- /* Nothing to do if not NAND flash. In particular, we shouldn't
+ /* Nothing to do if not write-buffering the flash. In particular, we shouldn't
del_timer() the timer we never initialised. */
- if (jffs2_can_mark_obsolete(c))
+ if (!jffs2_is_writebuffered(c))
return 0;
if (!down_trylock(&c->alloc_sem)) {
BUG();
}
- if(!c->wbuf || !c->wbuf_len)
+ if (!c->wbuf_len) /* already checked c->wbuf above */
return 0;
/* claim remaining space on the page
uint32_t outvec_to = to;
/* If not NAND flash, don't bother */
- if (!c->wbuf)
+ if (!jffs2_is_writebuffered(c))
return jffs2_flash_direct_writev(c, invecs, count, to, retlen);
down_write(&c->wbuf_sem);
erase block. Anything else, and you die.
New block starts at xxx000c (0-b = block header)
*/
- if ( (to & ~(c->sector_size-1)) != (c->wbuf_ofs & ~(c->sector_size-1)) ) {
+ if (SECTOR_ADDR(to) != SECTOR_ADDR(c->wbuf_ofs)) {
/* It's a write to a new block */
if (c->wbuf_len) {
D1(printk(KERN_DEBUG "jffs2_flash_writev() to 0x%lx causes flush of wbuf at 0x%08x\n", (unsigned long)to, c->wbuf_ofs));
{
struct kvec vecs[1];
- if (jffs2_can_mark_obsolete(c))
+ if (!jffs2_is_writebuffered(c))
return c->mtd->write(c->mtd, ofs, len, retlen, buf);
vecs[0].iov_base = (unsigned char *) buf;
loff_t orbf = 0, owbf = 0, lwbf = 0;
int ret;
- /* Read flash */
- if (!jffs2_can_mark_obsolete(c)) {
-
- if (jffs2_cleanmarker_oob(c))
- ret = c->mtd->read_ecc(c->mtd, ofs, len, retlen, buf, NULL, c->oobinfo);
- else
- ret = c->mtd->read(c->mtd, ofs, len, retlen, buf);
-
- if ( (ret == -EBADMSG) && (*retlen == len) ) {
- printk(KERN_WARNING "mtd->read(0x%zx bytes from 0x%llx) returned ECC error\n",
- len, ofs);
- /*
- * We have the raw data without ECC correction in the buffer, maybe
- * we are lucky and all data or parts are correct. We check the node.
- * If data are corrupted node check will sort it out.
- * We keep this block, it will fail on write or erase and the we
- * mark it bad. Or should we do that now? But we should give him a chance.
- * Maybe we had a system crash or power loss before the ecc write or
- * a erase was completed.
- * So we return success. :)
- */
- ret = 0;
- }
- } else
+ if (!jffs2_is_writebuffered(c))
return c->mtd->read(c->mtd, ofs, len, retlen, buf);
+ /* Read flash */
+ if (jffs2_cleanmarker_oob(c))
+ ret = c->mtd->read_ecc(c->mtd, ofs, len, retlen, buf, NULL, c->oobinfo);
+ else
+ ret = c->mtd->read(c->mtd, ofs, len, retlen, buf);
+
+ if ( (ret == -EBADMSG) && (*retlen == len) ) {
+ printk(KERN_WARNING "mtd->read(0x%zx bytes from 0x%llx) returned ECC error\n",
+ len, ofs);
+ /*
+ * We have the raw data without ECC correction in the buffer, maybe
+ * we are lucky and all data or parts are correct. We check the node.
+ * If data are corrupted node check will sort it out.
+ * We keep this block, it will fail on write or erase and the we
+ * mark it bad. Or should we do that now? But we should give him a chance.
+ * Maybe we had a system crash or power loss before the ecc write or
+ * a erase was completed.
+ * So we return success. :)
+ */
+ ret = 0;
+ }
+
/* if no writebuffer available or write buffer empty, return */
if (!c->wbuf_pagesize || !c->wbuf_len)
return ret;;
/* if we read in a different block, return */
- if ( (ofs & ~(c->sector_size-1)) != (c->wbuf_ofs & ~(c->sector_size-1)) )
+ if (SECTOR_ADDR(ofs) != SECTOR_ADDR(c->wbuf_ofs))
return ret;
/* Lock only if we have reason to believe wbuf contains relevant data,
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff