From 9824f75d56298e5fe4f9f57d9f3abd5fbf3d472c Mon Sep 17 00:00:00 2001 From: Jean-Christophe DUBOIS Date: Thu, 10 May 2012 17:13:44 +0200 Subject: jffs2: allow to discriminate between recoverable and non-recoverable errors This patch is basically a revert of commit f326966b3df47f4fa7e90425f60efdd30c31fe19. It allows JFFS2 to make the distinction between a potential transient error (reading or writing the media) and a non recoverable error like a bad CRC on the extended attribute data or some insconsitent parameters. In order to make clear that the error is indeed intended to report a corrupted attribute, a new local error code (JFFS2_XATTR_IS_CORRUPTED) is introduced rather than returning a confusing positive EIO, which is what led to the inappropriate "fix" last time. This error code is never reported to user space and only checked locally in this file. Signed-off-by: Jean-Christophe DUBOIS Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- fs/jffs2/xattr.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) (limited to 'fs/jffs2') diff --git a/fs/jffs2/xattr.c b/fs/jffs2/xattr.c index b55b803eddcb..c18c0ab70ea4 100644 --- a/fs/jffs2/xattr.c +++ b/fs/jffs2/xattr.c @@ -11,6 +11,8 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#define JFFS2_XATTR_IS_CORRUPTED 1 + #include #include #include @@ -153,7 +155,7 @@ static int do_verify_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_dat JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n", offset, je32_to_cpu(rx.hdr_crc), crc); xd->flags |= JFFS2_XFLAGS_INVALID; - return -EIO; + return JFFS2_XATTR_IS_CORRUPTED; } totlen = PAD(sizeof(rx) + rx.name_len + 1 + je16_to_cpu(rx.value_len)); if (je16_to_cpu(rx.magic) != JFFS2_MAGIC_BITMASK @@ -169,7 +171,7 @@ static int do_verify_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_dat je32_to_cpu(rx.xid), xd->xid, je32_to_cpu(rx.version), xd->version); xd->flags |= JFFS2_XFLAGS_INVALID; - return -EIO; + return JFFS2_XATTR_IS_CORRUPTED; } xd->xprefix = rx.xprefix; xd->name_len = rx.name_len; @@ -227,12 +229,12 @@ static int do_load_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum data[xd->name_len] = '\0'; crc = crc32(0, data, length); if (crc != xd->data_crc) { - JFFS2_WARNING("node CRC failed (JFFS2_NODETYPE_XREF)" + JFFS2_WARNING("node CRC failed (JFFS2_NODETYPE_XATTR)" " at %#08x, read: 0x%08x calculated: 0x%08x\n", ref_offset(xd->node), xd->data_crc, crc); kfree(data); xd->flags |= JFFS2_XFLAGS_INVALID; - return -EIO; + return JFFS2_XATTR_IS_CORRUPTED; } xd->flags |= JFFS2_XFLAGS_HOT; @@ -270,7 +272,7 @@ static int load_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *x if (xd->xname) return 0; if (xd->flags & JFFS2_XFLAGS_INVALID) - return -EIO; + return JFFS2_XATTR_IS_CORRUPTED; if (unlikely(is_xattr_datum_unchecked(c, xd))) rc = do_verify_xattr_datum(c, xd); if (!rc) @@ -462,7 +464,7 @@ static int verify_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref if (crc != je32_to_cpu(rr.node_crc)) { JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n", offset, je32_to_cpu(rr.node_crc), crc); - return -EIO; + return JFFS2_XATTR_IS_CORRUPTED; } if (je16_to_cpu(rr.magic) != JFFS2_MAGIC_BITMASK || je16_to_cpu(rr.nodetype) != JFFS2_NODETYPE_XREF @@ -472,7 +474,7 @@ static int verify_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref offset, je16_to_cpu(rr.magic), JFFS2_MAGIC_BITMASK, je16_to_cpu(rr.nodetype), JFFS2_NODETYPE_XREF, je32_to_cpu(rr.totlen), PAD(sizeof(rr))); - return -EIO; + return JFFS2_XATTR_IS_CORRUPTED; } ref->ino = je32_to_cpu(rr.ino); ref->xid = je32_to_cpu(rr.xid); -- cgit v1.2.3-59-g8ed1b