diff options
Diffstat (limited to 'fs/jffs2/readinode.c')
-rw-r--r-- | fs/jffs2/readinode.c | 119 |
1 files changed, 74 insertions, 45 deletions
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c index f1695642d0f7..5ea4faafa2d3 100644 --- a/fs/jffs2/readinode.c +++ b/fs/jffs2/readinode.c @@ -116,19 +116,42 @@ static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_r uint32_t *latest_mctime, uint32_t *mctime_ver) { struct jffs2_full_dirent *fd; + uint32_t crc; - /* The direntry nodes are checked during the flash scanning */ - BUG_ON(ref_flags(ref) == REF_UNCHECKED); /* Obsoleted. This cannot happen, surely? dwmw2 20020308 */ BUG_ON(ref_obsolete(ref)); - /* Sanity check */ - if (unlikely(PAD((rd->nsize + sizeof(*rd))) != PAD(je32_to_cpu(rd->totlen)))) { - JFFS2_ERROR("illegal nsize in node at %#08x: nsize %#02x, totlen %#04x\n", - ref_offset(ref), rd->nsize, je32_to_cpu(rd->totlen)); + crc = crc32(0, rd, sizeof(*rd) - 8); + if (unlikely(crc != je32_to_cpu(rd->node_crc))) { + JFFS2_NOTICE("header CRC failed on dirent node at %#08x: read %#08x, calculated %#08x\n", + ref_offset(ref), je32_to_cpu(rd->node_crc), crc); return 1; } + /* If we've never checked the CRCs on this node, check them now */ + if (ref_flags(ref) == REF_UNCHECKED) { + struct jffs2_eraseblock *jeb; + int len; + + /* Sanity check */ + if (unlikely(PAD((rd->nsize + sizeof(*rd))) != PAD(je32_to_cpu(rd->totlen)))) { + JFFS2_ERROR("illegal nsize in node at %#08x: nsize %#02x, totlen %#04x\n", + ref_offset(ref), rd->nsize, je32_to_cpu(rd->totlen)); + return 1; + } + + jeb = &c->blocks[ref->flash_offset / c->sector_size]; + len = ref_totlen(c, jeb, ref); + + spin_lock(&c->erase_completion_lock); + jeb->used_size += len; + jeb->unchecked_size -= len; + c->used_size += len; + c->unchecked_size -= len; + ref->flash_offset = ref_offset(ref) | REF_PRISTINE; + spin_unlock(&c->erase_completion_lock); + } + fd = jffs2_alloc_full_dirent(rd->nsize + 1); if (unlikely(!fd)) return -ENOMEM; @@ -198,13 +221,21 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref struct jffs2_tmp_dnode_info *tn; uint32_t len, csize; int ret = 1; + uint32_t crc; /* Obsoleted. This cannot happen, surely? dwmw2 20020308 */ BUG_ON(ref_obsolete(ref)); + crc = crc32(0, rd, sizeof(*rd) - 8); + if (unlikely(crc != je32_to_cpu(rd->node_crc))) { + JFFS2_NOTICE("node CRC failed on dnode at %#08x: read %#08x, calculated %#08x\n", + ref_offset(ref), je32_to_cpu(rd->node_crc), crc); + return 1; + } + tn = jffs2_alloc_tmp_dnode_info(); if (!tn) { - JFFS2_ERROR("failed to allocate tn (%d bytes).\n", sizeof(*tn)); + JFFS2_ERROR("failed to allocate tn (%zu bytes).\n", sizeof(*tn)); return -ENOMEM; } @@ -213,14 +244,6 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref /* If we've never checked the CRCs on this node, check them now */ if (ref_flags(ref) == REF_UNCHECKED) { - uint32_t crc; - - crc = crc32(0, rd, sizeof(*rd) - 8); - if (unlikely(crc != je32_to_cpu(rd->node_crc))) { - JFFS2_NOTICE("header CRC failed on node at %#08x: read %#08x, calculated %#08x\n", - ref_offset(ref), je32_to_cpu(rd->node_crc), crc); - goto free_out; - } /* Sanity checks */ if (unlikely(je32_to_cpu(rd->offset) > je32_to_cpu(rd->isize)) || @@ -343,7 +366,7 @@ free_out: * Helper function for jffs2_get_inode_nodes(). * It is called every time an unknown node is found. * - * Returns: 0 on succes; + * Returns: 0 on success; * 1 if the node should be marked obsolete; * negative error code on failure. */ @@ -354,37 +377,30 @@ static inline int read_unknown(struct jffs2_sb_info *c, struct jffs2_raw_node_re un->nodetype = cpu_to_je16(JFFS2_NODE_ACCURATE | je16_to_cpu(un->nodetype)); - if (crc32(0, un, sizeof(struct jffs2_unknown_node) - 4) != je32_to_cpu(un->hdr_crc)) { - /* Hmmm. This should have been caught at scan time. */ - JFFS2_NOTICE("node header CRC failed at %#08x. But it must have been OK earlier.\n", ref_offset(ref)); - jffs2_dbg_dump_node(c, ref_offset(ref)); - return 1; - } else { - switch(je16_to_cpu(un->nodetype) & JFFS2_COMPAT_MASK) { + switch(je16_to_cpu(un->nodetype) & JFFS2_COMPAT_MASK) { - case JFFS2_FEATURE_INCOMPAT: - JFFS2_ERROR("unknown INCOMPAT nodetype %#04X at %#08x\n", - je16_to_cpu(un->nodetype), ref_offset(ref)); - /* EEP */ - BUG(); - break; + case JFFS2_FEATURE_INCOMPAT: + JFFS2_ERROR("unknown INCOMPAT nodetype %#04X at %#08x\n", + je16_to_cpu(un->nodetype), ref_offset(ref)); + /* EEP */ + BUG(); + break; - case JFFS2_FEATURE_ROCOMPAT: - JFFS2_ERROR("unknown ROCOMPAT nodetype %#04X at %#08x\n", - je16_to_cpu(un->nodetype), ref_offset(ref)); - BUG_ON(!(c->flags & JFFS2_SB_FLAG_RO)); - break; + case JFFS2_FEATURE_ROCOMPAT: + JFFS2_ERROR("unknown ROCOMPAT nodetype %#04X at %#08x\n", + je16_to_cpu(un->nodetype), ref_offset(ref)); + BUG_ON(!(c->flags & JFFS2_SB_FLAG_RO)); + break; - case JFFS2_FEATURE_RWCOMPAT_COPY: - JFFS2_NOTICE("unknown RWCOMPAT_COPY nodetype %#04X at %#08x\n", - je16_to_cpu(un->nodetype), ref_offset(ref)); - break; + case JFFS2_FEATURE_RWCOMPAT_COPY: + JFFS2_NOTICE("unknown RWCOMPAT_COPY nodetype %#04X at %#08x\n", + je16_to_cpu(un->nodetype), ref_offset(ref)); + break; - case JFFS2_FEATURE_RWCOMPAT_DELETE: - JFFS2_NOTICE("unknown RWCOMPAT_DELETE nodetype %#04X at %#08x\n", - je16_to_cpu(un->nodetype), ref_offset(ref)); - return 1; - } + case JFFS2_FEATURE_RWCOMPAT_DELETE: + JFFS2_NOTICE("unknown RWCOMPAT_DELETE nodetype %#04X at %#08x\n", + je16_to_cpu(un->nodetype), ref_offset(ref)); + return 1; } return 0; @@ -434,7 +450,7 @@ static int read_more(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *ref, } if (retlen < len) { - JFFS2_ERROR("short read at %#08x: %d instead of %d.\n", + JFFS2_ERROR("short read at %#08x: %zu instead of %d.\n", offs, retlen, len); return -EIO; } @@ -542,13 +558,25 @@ static int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_inf } if (retlen < len) { - JFFS2_ERROR("short read at %#08x: %d instead of %d.\n", ref_offset(ref), retlen, len); + JFFS2_ERROR("short read at %#08x: %zu instead of %d.\n", ref_offset(ref), retlen, len); err = -EIO; goto free_out; } node = (union jffs2_node_union *)bufstart; + /* No need to mask in the valid bit; it shouldn't be invalid */ + if (je32_to_cpu(node->u.hdr_crc) != crc32(0, node, sizeof(node->u)-4)) { + JFFS2_NOTICE("Node header CRC failed at %#08x. {%04x,%04x,%08x,%08x}\n", + ref_offset(ref), je16_to_cpu(node->u.magic), + je16_to_cpu(node->u.nodetype), + je32_to_cpu(node->u.totlen), + je32_to_cpu(node->u.hdr_crc)); + jffs2_dbg_dump_node(c, ref_offset(ref)); + jffs2_mark_node_obsolete(c, ref); + goto cont; + } + switch (je16_to_cpu(node->u.nodetype)) { case JFFS2_NODETYPE_DIRENT: @@ -606,6 +634,7 @@ static int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_inf goto free_out; } + cont: spin_lock(&c->erase_completion_lock); } |