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authorDavid Woodhouse <dwmw2@infradead.org>2006-05-19 00:28:49 +0100
committerDavid Woodhouse <dwmw2@infradead.org>2006-05-19 00:28:49 +0100
commitaef9ab47841af45888d950baa6448072cc70bdd5 (patch)
tree79545ddc225f64bc38fa04525ac4125c86202cb8 /fs/jffs2/gc.c
parentf6a673b3f4f93c1c50e1b18f29254b0531b722a8 (diff)
[JFFS2] Support new device nodes
Device node major/minor numbers are just stored in the payload of a single data node. Just extend that to 4 bytes and use new_encode_dev() for it. We only use the 4-byte format if we _need_ to, if !old_valid_dev(foo). This preserves backwards compatibility with older code as much as possible. If we do make devices with major or minor numbers above 255, and then mount the file system with the old code, it'll just read the first two bytes and get the numbers wrong. If it comes to garbage-collect it, it'll then write back those wrong numbers. But that's about the best we can expect. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'fs/jffs2/gc.c')
-rw-r--r--fs/jffs2/gc.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c
index 967fb2cf8e21..77d30707de56 100644
--- a/fs/jffs2/gc.c
+++ b/fs/jffs2/gc.c
@@ -679,7 +679,7 @@ static int jffs2_garbage_collect_metadata(struct jffs2_sb_info *c, struct jffs2_
struct jffs2_full_dnode *new_fn;
struct jffs2_raw_inode ri;
struct jffs2_node_frag *last_frag;
- jint16_t dev;
+ union jffs2_device_node dev;
char *mdata = NULL, mdatalen = 0;
uint32_t alloclen, phys_ofs, ilen;
int ret;
@@ -687,11 +687,8 @@ static int jffs2_garbage_collect_metadata(struct jffs2_sb_info *c, struct jffs2_
if (S_ISBLK(JFFS2_F_I_MODE(f)) ||
S_ISCHR(JFFS2_F_I_MODE(f)) ) {
/* For these, we don't actually need to read the old node */
- /* FIXME: for minor or major > 255. */
- dev = cpu_to_je16(((JFFS2_F_I_RDEV_MAJ(f) << 8) |
- JFFS2_F_I_RDEV_MIN(f)));
+ mdatalen = jffs2_encode_dev(&dev, JFFS2_F_I_RDEV(f));
mdata = (char *)&dev;
- mdatalen = sizeof(dev);
D1(printk(KERN_DEBUG "jffs2_garbage_collect_metadata(): Writing %d bytes of kdev_t\n", mdatalen));
} else if (S_ISLNK(JFFS2_F_I_MODE(f))) {
mdatalen = fn->size;