diff options
Diffstat (limited to 'target/linux/generic/pending-4.19/532-jffs2_eofdetect.patch')
| -rw-r--r-- | target/linux/generic/pending-4.19/532-jffs2_eofdetect.patch | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/target/linux/generic/pending-4.19/532-jffs2_eofdetect.patch b/target/linux/generic/pending-4.19/532-jffs2_eofdetect.patch new file mode 100644 index 0000000000..e9952c6d84 --- /dev/null +++ b/target/linux/generic/pending-4.19/532-jffs2_eofdetect.patch @@ -0,0 +1,65 @@ +From: Felix Fietkau <nbd@nbd.name> +Subject: fs: jffs2: EOF marker + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + fs/jffs2/build.c | 10 ++++++++++ + fs/jffs2/scan.c | 21 +++++++++++++++++++-- + 2 files changed, 29 insertions(+), 2 deletions(-) + +--- a/fs/jffs2/build.c ++++ b/fs/jffs2/build.c +@@ -117,6 +117,16 @@ 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__); ++ 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 +@@ -148,8 +148,14 @@ 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)) { ++ if (mtd_block_isbad(c->mtd, jeb->offset)) ++ ret = BLK_STATE_BADBLOCK; ++ else ++ 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; +@@ -561,6 +567,17 @@ full_scan: + 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); |