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| author | Thomas Gleixner <tglx@inhell4.tec.linutronix.de> | 2007-04-05 11:09:01 +0200 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2007-04-17 18:26:18 +0100 |
| commit | 53043002ef6cc0369fd5c5fa0a257f290ba6a3a6 (patch) | |
| tree | cad0817f06b09b442eb395b4fc201e1deade8f3f /fs/jffs2 | |
| parent | 873b6a230652803d1de480f5d3b802e4ffd0bcad (diff) | |
| download | linux-53043002ef6cc0369fd5c5fa0a257f290ba6a3a6.tar.gz linux-53043002ef6cc0369fd5c5fa0a257f290ba6a3a6.tar.bz2 linux-53043002ef6cc0369fd5c5fa0a257f290ba6a3a6.zip | |
[JFFS2] check node crc before doing anything else
Check the node CRC on scan before doing anything else with the node.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'fs/jffs2')
| -rw-r--r-- | fs/jffs2/scan.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/fs/jffs2/scan.c b/fs/jffs2/scan.c index 7fb45bd4915c..a5103df5242e 100644 --- a/fs/jffs2/scan.c +++ b/fs/jffs2/scan.c @@ -952,8 +952,7 @@ static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_erasebloc struct jffs2_raw_inode *ri, uint32_t ofs, struct jffs2_summary *s) { struct jffs2_inode_cache *ic; - uint32_t ino = je32_to_cpu(ri->ino); - int err; + uint32_t crc, ino = je32_to_cpu(ri->ino); D1(printk(KERN_DEBUG "jffs2_scan_inode_node(): Node at 0x%08x\n", ofs)); @@ -966,21 +965,22 @@ static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_erasebloc Which means that the _full_ amount of time to get to proper write mode with GC operational may actually be _longer_ than before. Sucks to be me. */ + /* Check the node CRC in any case. */ + crc = crc32(0, ri, sizeof(*ri)-8); + if (crc != je32_to_cpu(ri->node_crc)) { + printk(KERN_NOTICE "jffs2_scan_inode_node(): CRC failed on " + "node at 0x%08x: Read 0x%08x, calculated 0x%08x\n", + ofs, je32_to_cpu(ri->node_crc), crc); + /* + * We believe totlen because the CRC on the node + * _header_ was OK, just the node itself failed. + */ + return jffs2_scan_dirty_space(c, jeb, + PAD(je32_to_cpu(ri->totlen))); + } + ic = jffs2_get_ino_cache(c, ino); if (!ic) { - /* Inocache get failed. Either we read a bogus ino# or it's just genuinely the - first node we found for this inode. Do a CRC check to protect against the former - case */ - uint32_t crc = crc32(0, ri, sizeof(*ri)-8); - - if (crc != je32_to_cpu(ri->node_crc)) { - printk(KERN_NOTICE "jffs2_scan_inode_node(): CRC failed on node at 0x%08x: Read 0x%08x, calculated 0x%08x\n", - ofs, je32_to_cpu(ri->node_crc), crc); - /* We believe totlen because the CRC on the node _header_ was OK, just the node itself failed. */ - if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(ri->totlen))))) - return err; - return 0; - } ic = jffs2_scan_make_ino_cache(c, ino); if (!ic) return -ENOMEM; |