diff options
Diffstat (limited to 'target/linux/generic/patches-2.6.38/512-jffs2_eofdetect.patch')
| -rw-r--r-- | target/linux/generic/patches-2.6.38/512-jffs2_eofdetect.patch | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/target/linux/generic/patches-2.6.38/512-jffs2_eofdetect.patch b/target/linux/generic/patches-2.6.38/512-jffs2_eofdetect.patch new file mode 100644 index 0000000..eaf9489 --- /dev/null +++ b/target/linux/generic/patches-2.6.38/512-jffs2_eofdetect.patch @@ -0,0 +1,132 @@ +--- a/fs/jffs2/build.c ++++ b/fs/jffs2/build.c +@@ -112,6 +112,17 @@ static int jffs2_build_filesystem(struct + dbg_fsbuild("scanned flash completely\n"); + jffs2_dbg_dump_block_lists_nolock(c); + ++ if (c->flags & (1 << 7)) { ++ printk("%s(): unlocking the mtd device... ", __func__); ++ if (c->mtd->unlock) ++ c->mtd->unlock(c->mtd, 0, c->mtd->size); ++ printk("done.\n"); ++ ++ printk("%s(): erasing all blocks after the end marker... ", __func__); ++ jffs2_erase_pending_blocks(c, -1); ++ printk("done.\n"); ++ } ++ + dbg_fsbuild("pass 1 starting\n"); + c->flags |= JFFS2_SB_FLAG_BUILDING; + /* Now scan the directory tree, increasing nlink according to every dirent found. */ +--- a/fs/jffs2/scan.c ++++ b/fs/jffs2/scan.c +@@ -72,7 +72,7 @@ static int file_dirty(struct jffs2_sb_in + return ret; + if ((ret = jffs2_scan_dirty_space(c, jeb, jeb->free_size))) + return ret; +- /* Turned wasted size into dirty, since we apparently ++ /* Turned wasted size into dirty, since we apparently + think it's recoverable now. */ + jeb->dirty_size += jeb->wasted_size; + c->dirty_size += jeb->wasted_size; +@@ -144,8 +144,11 @@ int jffs2_scan_medium(struct jffs2_sb_in + /* reset summary info for next eraseblock scan */ + jffs2_sum_reset_collected(s); + +- ret = jffs2_scan_eraseblock(c, jeb, buf_size?flashbuf:(flashbuf+jeb->offset), +- buf_size, s); ++ if (c->flags & (1 << 7)) ++ ret = BLK_STATE_ALLFF; ++ else ++ ret = jffs2_scan_eraseblock(c, jeb, buf_size?flashbuf:(flashbuf+jeb->offset), ++ buf_size, s); + + if (ret < 0) + goto out; +@@ -402,7 +405,7 @@ static int jffs2_scan_xref_node(struct j + if (!ref) + return -ENOMEM; + +- /* BEFORE jffs2_build_xattr_subsystem() called, ++ /* BEFORE jffs2_build_xattr_subsystem() called, + * and AFTER xattr_ref is marked as a dead xref, + * ref->xid is used to store 32bit xid, xd is not used + * ref->ino is used to store 32bit inode-number, ic is not used +@@ -475,7 +478,7 @@ static int jffs2_scan_eraseblock (struct + struct jffs2_sum_marker *sm; + void *sumptr = NULL; + uint32_t sumlen; +- ++ + if (!buf_size) { + /* XIP case. Just look, point at the summary if it's there */ + sm = (void *)buf + c->sector_size - sizeof(*sm); +@@ -491,9 +494,9 @@ static int jffs2_scan_eraseblock (struct + buf_len = sizeof(*sm); + + /* Read as much as we want into the _end_ of the preallocated buffer */ +- err = jffs2_fill_scan_buf(c, buf + buf_size - buf_len, ++ err = jffs2_fill_scan_buf(c, buf + buf_size - buf_len, + jeb->offset + c->sector_size - buf_len, +- buf_len); ++ buf_len); + if (err) + return err; + +@@ -512,9 +515,9 @@ static int jffs2_scan_eraseblock (struct + } + if (buf_len < sumlen) { + /* Need to read more so that the entire summary node is present */ +- err = jffs2_fill_scan_buf(c, sumptr, ++ err = jffs2_fill_scan_buf(c, sumptr, + jeb->offset + c->sector_size - sumlen, +- sumlen - buf_len); ++ sumlen - buf_len); + if (err) + return err; + } +@@ -527,7 +530,7 @@ static int jffs2_scan_eraseblock (struct + + if (buf_size && sumlen > buf_size) + kfree(sumptr); +- /* If it returns with a real error, bail. ++ /* If it returns with a real error, bail. + If it returns positive, that's a block classification + (i.e. BLK_STATE_xxx) so return that too. + If it returns zero, fall through to full scan. */ +@@ -548,6 +551,17 @@ static int jffs2_scan_eraseblock (struct + return err; + } + ++ if ((buf[0] == 0xde) && ++ (buf[1] == 0xad) && ++ (buf[2] == 0xc0) && ++ (buf[3] == 0xde)) { ++ /* end of filesystem. erase everything after this point */ ++ printk("%s(): End of filesystem marker found at 0x%x\n", __func__, jeb->offset); ++ c->flags |= (1 << 7); ++ ++ return BLK_STATE_ALLFF; ++ } ++ + /* We temporarily use 'ofs' as a pointer into the buffer/jeb */ + ofs = 0; + max_ofs = EMPTY_SCAN_SIZE(c->sector_size); +@@ -673,7 +687,7 @@ scan_more: + scan_end = buf_len; + goto more_empty; + } +- ++ + /* See how much more there is to read in this eraseblock... */ + buf_len = min_t(uint32_t, buf_size, jeb->offset + c->sector_size - ofs); + if (!buf_len) { +@@ -909,7 +923,7 @@ scan_more: + + D1(printk(KERN_DEBUG "Block at 0x%08x: free 0x%08x, dirty 0x%08x, unchecked 0x%08x, used 0x%08x, wasted 0x%08x\n", + jeb->offset,jeb->free_size, jeb->dirty_size, jeb->unchecked_size, jeb->used_size, jeb->wasted_size)); +- ++ + /* mark_node_obsolete can add to wasted !! */ + if (jeb->wasted_size) { + jeb->dirty_size += jeb->wasted_size; |