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| author | Artem B. Bityutskiy <dedekind@infradead.org> | 2005-08-17 15:57:43 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@mtd.linutronix.de> | 2005-11-06 20:29:56 +0100 |
| commit | 280562b2104c9a0ca7efc5e716b6452a7ba820fa (patch) | |
| tree | 6dcee70d0ec3da6fbb8afd9e05e6b73c1a46e97a | |
| parent | 8d5df40954281a8e0f788b311f9c08f96e530ffa (diff) | |
| download | linux-280562b2104c9a0ca7efc5e716b6452a7ba820fa.tar.gz linux-280562b2104c9a0ca7efc5e716b6452a7ba820fa.tar.bz2 linux-280562b2104c9a0ca7efc5e716b6452a7ba820fa.zip | |
[JFFS2] Calculate CRC check starting point correctly
When data starts from the beginning of NAND page, 'len' must be zero, not
c->wbuf_page.
Thanks to Zoltan Sogor for reporting this problem.
Signed-off-by: Artem B. Bityutskiy <dedekind@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | fs/jffs2/nodelist.c | 5 | ||||
| -rw-r--r-- | fs/jffs2/readinode.c | 12 |
2 files changed, 9 insertions, 8 deletions
diff --git a/fs/jffs2/nodelist.c b/fs/jffs2/nodelist.c index 0393d27eafc7..fd21f109fbd2 100644 --- a/fs/jffs2/nodelist.c +++ b/fs/jffs2/nodelist.c @@ -7,7 +7,7 @@ * * For licensing information, see the file 'LICENCE' in this directory. * - * $Id: nodelist.c,v 1.110 2005/08/17 14:13:45 dedekind Exp $ + * $Id: nodelist.c,v 1.111 2005/08/17 14:57:39 dedekind Exp $ * */ @@ -413,7 +413,8 @@ static int check_node_data(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info /* Calculate how many bytes were already checked */ ofs = ref_offset(ref) + sizeof(struct jffs2_raw_inode); len = ofs & (c->wbuf_pagesize - 1); - len = c->wbuf_pagesize - len; + if (likely(len)) + len = c->wbuf_pagesize - len; if (len >= tn->csize) { JFFS2_DBG_READINODE("no need to check node at %#08x, data length %u, data starts at %#08x - it has already been checked.\n", diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c index 6d5adaba4062..6f1e4a7ecd9f 100644 --- a/fs/jffs2/readinode.c +++ b/fs/jffs2/readinode.c @@ -7,7 +7,7 @@ * * For licensing information, see the file 'LICENCE' in this directory. * - * $Id: readinode.c,v 1.140 2005/08/17 13:46:23 dedekind Exp $ + * $Id: readinode.c,v 1.141 2005/08/17 14:57:39 dedekind Exp $ * */ @@ -272,9 +272,9 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref buf = (unsigned char *)rd + sizeof(*rd); /* len will be the read data length */ len = min_t(uint32_t, rdlen - sizeof(*rd), csize); - - if (len) - tn->partial_crc = crc = crc32(0, buf, len); + tn->partial_crc = crc32(0, buf, len); + + JFFS2_DBG_READINODE("Calculates CRC (%#08x) for %d bytes, csize %d\n", tn->partial_crc, len, csize); /* If we actually calculated the whole data CRC * and it is wrong, drop the node. */ @@ -327,8 +327,8 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref else // normal case... tn->fn->size = je32_to_cpu(rd->dsize); - JFFS2_DBG_READINODE("dnode @%08x: ver %u, offset %#04x, dsize %#04x\n", - ref_offset(ref), je32_to_cpu(rd->version), je32_to_cpu(rd->offset), je32_to_cpu(rd->dsize)); + JFFS2_DBG_READINODE("dnode @%08x: ver %u, offset %#04x, dsize %#04x, csize %#04x\n", + ref_offset(ref), je32_to_cpu(rd->version), je32_to_cpu(rd->offset), je32_to_cpu(rd->dsize), csize); jffs2_add_tn_to_tree(tn, tnp); |