diff options
Diffstat (limited to 'fs/jffs2/readinode.c')
| -rw-r--r-- | fs/jffs2/readinode.c | 45 |
1 files changed, 25 insertions, 20 deletions
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c index 4884d5edfe6..7b363786c2d 100644 --- a/fs/jffs2/readinode.c +++ b/fs/jffs2/readinode.c @@ -210,8 +210,7 @@ static void jffs2_kill_tn(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info * * offset, and the one with the smallest length will come first in the * ordering. * - * Returns 0 if the node was inserted - * 1 if the node is obsolete (because we can't mark it so yet) + * Returns 0 if the node was handled (including marking it obsolete) * < 0 an if error occurred */ static int jffs2_add_tn_to_tree(struct jffs2_sb_info *c, @@ -229,9 +228,16 @@ static int jffs2_add_tn_to_tree(struct jffs2_sb_info *c, check anyway. */ if (!tn->fn->size) { if (rii->mdata_tn) { - /* We had a candidate mdata node already */ - dbg_readinode("kill old mdata with ver %d\n", rii->mdata_tn->version); - jffs2_kill_tn(c, rii->mdata_tn); + if (rii->mdata_tn->version < tn->version) { + /* We had a candidate mdata node already */ + dbg_readinode("kill old mdata with ver %d\n", rii->mdata_tn->version); + jffs2_kill_tn(c, rii->mdata_tn); + } else { + dbg_readinode("kill new mdata with ver %d (older than existing %d\n", + tn->version, rii->mdata_tn->version); + jffs2_kill_tn(c, tn); + return 0; + } } rii->mdata_tn = tn; dbg_readinode("keep new mdata with ver %d\n", tn->version); @@ -565,8 +571,7 @@ static struct jffs2_raw_node_ref *jffs2_first_valid_node(struct jffs2_raw_node_r * Helper function for jffs2_get_inode_nodes(). * It is called every time an directory entry node is found. * - * Returns: 0 on succes; - * 1 if the node should be marked obsolete; + * Returns: 0 on success; * negative error code on failure. */ static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *ref, @@ -673,8 +678,7 @@ static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_r * Helper function for jffs2_get_inode_nodes(). * It is called every time an inode node is found. * - * Returns: 0 on success; - * 1 if the node should be marked obsolete; + * Returns: 0 on success (possibly after marking a bad node obsolete); * negative error code on failure. */ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *ref, @@ -683,7 +687,7 @@ 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; + int ret = 0; uint32_t crc; /* Obsoleted. This cannot happen, surely? dwmw2 20020308 */ @@ -712,8 +716,9 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref /* Sanity checks */ if (unlikely(je32_to_cpu(rd->offset) > je32_to_cpu(rd->isize)) || unlikely(PAD(je32_to_cpu(rd->csize) + sizeof(*rd)) != PAD(je32_to_cpu(rd->totlen)))) { - JFFS2_WARNING("inode node header CRC is corrupted at %#08x\n", ref_offset(ref)); - jffs2_dbg_dump_node(c, ref_offset(ref)); + JFFS2_WARNING("inode node header CRC is corrupted at %#08x\n", ref_offset(ref)); + jffs2_dbg_dump_node(c, ref_offset(ref)); + jffs2_mark_node_obsolete(c, ref); goto free_out; } @@ -768,6 +773,7 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref if (len >= csize && unlikely(tn->partial_crc != je32_to_cpu(rd->data_crc))) { JFFS2_NOTICE("wrong data CRC in data node at 0x%08x: read %#08x, calculated %#08x.\n", ref_offset(ref), tn->partial_crc, je32_to_cpu(rd->data_crc)); + jffs2_mark_node_obsolete(c, ref); goto free_out; } @@ -847,7 +853,6 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref * It is called every time an unknown node is found. * * Returns: 0 on success; - * 1 if the node should be marked obsolete; * negative error code on failure. */ static inline int read_unknown(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *ref, struct jffs2_unknown_node *un) @@ -1044,7 +1049,8 @@ static int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_inf case JFFS2_NODETYPE_DIRENT: - if (JFFS2_MIN_NODE_HEADER < sizeof(struct jffs2_raw_dirent)) { + if (JFFS2_MIN_NODE_HEADER < sizeof(struct jffs2_raw_dirent) && + len < sizeof(struct jffs2_raw_dirent)) { err = read_more(c, ref, sizeof(struct jffs2_raw_dirent), &len, buf); if (unlikely(err)) goto free_out; @@ -1058,7 +1064,8 @@ static int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_inf case JFFS2_NODETYPE_INODE: - if (JFFS2_MIN_NODE_HEADER < sizeof(struct jffs2_raw_inode)) { + if (JFFS2_MIN_NODE_HEADER < sizeof(struct jffs2_raw_inode) && + len < sizeof(struct jffs2_raw_inode)) { err = read_more(c, ref, sizeof(struct jffs2_raw_inode), &len, buf); if (unlikely(err)) goto free_out; @@ -1071,17 +1078,15 @@ static int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_inf break; default: - if (JFFS2_MIN_NODE_HEADER < sizeof(struct jffs2_unknown_node)) { + if (JFFS2_MIN_NODE_HEADER < sizeof(struct jffs2_unknown_node) && + len < sizeof(struct jffs2_unknown_node)) { err = read_more(c, ref, sizeof(struct jffs2_unknown_node), &len, buf); if (unlikely(err)) goto free_out; } err = read_unknown(c, ref, &node->u); - if (err == 1) { - jffs2_mark_node_obsolete(c, ref); - break; - } else if (unlikely(err)) + if (unlikely(err)) goto free_out; } |