mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 18:19:02 +00:00
133 lines
4.4 KiB
Diff
133 lines
4.4 KiB
Diff
--- a/fs/jffs2/build.c
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+++ b/fs/jffs2/build.c
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@@ -112,6 +112,17 @@ static int jffs2_build_filesystem(struct
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dbg_fsbuild("scanned flash completely\n");
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jffs2_dbg_dump_block_lists_nolock(c);
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+ if (c->flags & (1 << 7)) {
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+ printk("%s(): unlocking the mtd device... ", __func__);
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+ if (c->mtd->unlock)
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+ c->mtd->unlock(c->mtd, 0, c->mtd->size);
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+ printk("done.\n");
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+
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+ printk("%s(): erasing all blocks after the end marker... ", __func__);
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+ jffs2_erase_pending_blocks(c, -1);
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+ printk("done.\n");
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+ }
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+
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dbg_fsbuild("pass 1 starting\n");
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c->flags |= JFFS2_SB_FLAG_BUILDING;
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/* Now scan the directory tree, increasing nlink according to every dirent found. */
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--- a/fs/jffs2/scan.c
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+++ b/fs/jffs2/scan.c
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@@ -72,7 +72,7 @@ static int file_dirty(struct jffs2_sb_in
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return ret;
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if ((ret = jffs2_scan_dirty_space(c, jeb, jeb->free_size)))
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return ret;
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- /* Turned wasted size into dirty, since we apparently
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+ /* Turned wasted size into dirty, since we apparently
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think it's recoverable now. */
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jeb->dirty_size += jeb->wasted_size;
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c->dirty_size += jeb->wasted_size;
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@@ -144,8 +144,11 @@ int jffs2_scan_medium(struct jffs2_sb_in
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/* reset summary info for next eraseblock scan */
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jffs2_sum_reset_collected(s);
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- ret = jffs2_scan_eraseblock(c, jeb, buf_size?flashbuf:(flashbuf+jeb->offset),
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- buf_size, s);
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+ if (c->flags & (1 << 7))
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+ ret = BLK_STATE_ALLFF;
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+ else
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+ ret = jffs2_scan_eraseblock(c, jeb, buf_size?flashbuf:(flashbuf+jeb->offset),
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+ buf_size, s);
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if (ret < 0)
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goto out;
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@@ -402,7 +405,7 @@ static int jffs2_scan_xref_node(struct j
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if (!ref)
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return -ENOMEM;
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- /* BEFORE jffs2_build_xattr_subsystem() called,
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+ /* BEFORE jffs2_build_xattr_subsystem() called,
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* and AFTER xattr_ref is marked as a dead xref,
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* ref->xid is used to store 32bit xid, xd is not used
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* ref->ino is used to store 32bit inode-number, ic is not used
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@@ -475,7 +478,7 @@ static int jffs2_scan_eraseblock (struct
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struct jffs2_sum_marker *sm;
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void *sumptr = NULL;
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uint32_t sumlen;
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-
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+
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if (!buf_size) {
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/* XIP case. Just look, point at the summary if it's there */
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sm = (void *)buf + c->sector_size - sizeof(*sm);
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@@ -491,9 +494,9 @@ static int jffs2_scan_eraseblock (struct
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buf_len = sizeof(*sm);
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/* Read as much as we want into the _end_ of the preallocated buffer */
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- err = jffs2_fill_scan_buf(c, buf + buf_size - buf_len,
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+ err = jffs2_fill_scan_buf(c, buf + buf_size - buf_len,
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jeb->offset + c->sector_size - buf_len,
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- buf_len);
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+ buf_len);
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if (err)
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return err;
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@@ -512,9 +515,9 @@ static int jffs2_scan_eraseblock (struct
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}
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if (buf_len < sumlen) {
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/* Need to read more so that the entire summary node is present */
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- err = jffs2_fill_scan_buf(c, sumptr,
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+ err = jffs2_fill_scan_buf(c, sumptr,
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jeb->offset + c->sector_size - sumlen,
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- sumlen - buf_len);
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+ sumlen - buf_len);
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if (err)
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return err;
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}
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@@ -527,7 +530,7 @@ static int jffs2_scan_eraseblock (struct
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if (buf_size && sumlen > buf_size)
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kfree(sumptr);
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- /* If it returns with a real error, bail.
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+ /* If it returns with a real error, bail.
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If it returns positive, that's a block classification
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(i.e. BLK_STATE_xxx) so return that too.
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If it returns zero, fall through to full scan. */
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@@ -548,6 +551,17 @@ static int jffs2_scan_eraseblock (struct
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return err;
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}
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+ if ((buf[0] == 0xde) &&
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+ (buf[1] == 0xad) &&
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+ (buf[2] == 0xc0) &&
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+ (buf[3] == 0xde)) {
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+ /* end of filesystem. erase everything after this point */
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+ printk("%s(): End of filesystem marker found at 0x%x\n", __func__, jeb->offset);
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+ c->flags |= (1 << 7);
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+
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+ return BLK_STATE_ALLFF;
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+ }
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+
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/* We temporarily use 'ofs' as a pointer into the buffer/jeb */
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ofs = 0;
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max_ofs = EMPTY_SCAN_SIZE(c->sector_size);
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@@ -673,7 +687,7 @@ scan_more:
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scan_end = buf_len;
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goto more_empty;
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}
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-
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+
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/* See how much more there is to read in this eraseblock... */
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buf_len = min_t(uint32_t, buf_size, jeb->offset + c->sector_size - ofs);
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if (!buf_len) {
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@@ -909,7 +923,7 @@ scan_more:
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D1(printk(KERN_DEBUG "Block at 0x%08x: free 0x%08x, dirty 0x%08x, unchecked 0x%08x, used 0x%08x, wasted 0x%08x\n",
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jeb->offset,jeb->free_size, jeb->dirty_size, jeb->unchecked_size, jeb->used_size, jeb->wasted_size));
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-
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+
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/* mark_node_obsolete can add to wasted !! */
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if (jeb->wasted_size) {
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jeb->dirty_size += jeb->wasted_size;
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