6 files changed, 43 insertions, 22 deletions

diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index 1c8e8c0f6cea..a6c11cef1b73 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -591,12 +591,12 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
         struct jffs2_full_dnode *fn;
         struct jffs2_full_dirent *fd;
         int namelen;
-        jint16_t dev;
+        union jffs2_device_node dev;
         int devlen = 0;
         uint32_t alloclen, phys_ofs;
         int ret;
 
-        if (!old_valid_dev(rdev))
+        if (!new_valid_dev(rdev))
                 return -EINVAL;
 
         ri = jffs2_alloc_raw_inode();
@@ -605,17 +605,15 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
 
         c = JFFS2_SB_INFO(dir_i->i_sb);
 
-        if (S_ISBLK(mode) || S_ISCHR(mode)) {
-                dev = cpu_to_je16(old_encode_dev(rdev));
-                devlen = sizeof(dev);
-        }
+        if (S_ISBLK(mode) || S_ISCHR(mode))
+                devlen = jffs2_encode_dev(&dev, rdev);
 
         /* Try to reserve enough space for both node and dirent.
          * Just the node will do for now, though
          */
         namelen = dentry->d_name.len;
         ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &phys_ofs, &alloclen,
-                                ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
+                                  ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
 
         if (ret) {
                 jffs2_free_raw_inode(ri);
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index ea1f37d4fc58..24cb4c688efc 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -33,7 +33,7 @@ static int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
         struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
         struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
         struct jffs2_raw_inode *ri;
-        unsigned short dev;
+        union jffs2_device_node dev;
         unsigned char *mdata = NULL;
         int mdatalen = 0;
         unsigned int ivalid;
@@ -51,9 +51,8 @@ static int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
            it out again with the appropriate data attached */
         if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode)) {
                 /* For these, we don't actually need to read the old node */
-                dev = old_encode_dev(inode->i_rdev);
+                mdatalen = jffs2_encode_dev(&dev, inode->i_rdev);
                 mdata = (char *)&dev;
-                mdatalen = sizeof(dev);
                 D1(printk(KERN_DEBUG "jffs2_setattr(): Writing %d bytes of kdev_t\n", mdatalen));
         } else if (S_ISLNK(inode->i_mode)) {
                 down(&f->sem);
@@ -232,6 +231,8 @@ void jffs2_read_inode (struct inode *inode)
         struct jffs2_inode_info *f;
         struct jffs2_sb_info *c;
         struct jffs2_raw_inode latest_node;
+        union jffs2_device_node jdev;
+        dev_t rdev = 0;
         int ret;
 
         D1(printk(KERN_DEBUG "jffs2_read_inode(): inode->i_ino == %lu\n", inode->i_ino));
@@ -263,7 +264,6 @@ void jffs2_read_inode (struct inode *inode)
         inode->i_blocks = (inode->i_size + 511) >> 9;
 
         switch (inode->i_mode & S_IFMT) {
-                jint16_t rdev;
 
         case S_IFLNK:
                 inode->i_op = &jffs2_symlink_inode_operations;
@@ -297,8 +297,16 @@ void jffs2_read_inode (struct inode *inode)
         case S_IFBLK:
         case S_IFCHR:
                 /* Read the device numbers from the media */
+                if (f->metadata->size != sizeof(jdev.old) &&
+                    f->metadata->size != sizeof(jdev.new)) {
+                        printk(KERN_NOTICE "Device node has strange size %d\n", f->metadata->size);
+                        up(&f->sem);
+                        jffs2_do_clear_inode(c, f);
+                        make_bad_inode(inode);
+                        return;
+                }
                 D1(printk(KERN_DEBUG "Reading device numbers from flash\n"));
-                if (jffs2_read_dnode(c, f, f->metadata, (char *)&rdev, 0, sizeof(rdev)) < 0) {
+                if (jffs2_read_dnode(c, f, f->metadata, (char *)&jdev, 0, f->metadata->size) < 0) {
                         /* Eep */
                         printk(KERN_NOTICE "Read device numbers for inode %lu failed\n", (unsigned long)inode->i_ino);
                         up(&f->sem);
@@ -306,12 +314,15 @@ void jffs2_read_inode (struct inode *inode)
                         make_bad_inode(inode);
                         return;
                 }
+                if (f->metadata->size == sizeof(jdev.old))
+                        rdev = old_decode_dev(je16_to_cpu(jdev.old));
+                else
+                        rdev = new_decode_dev(je32_to_cpu(jdev.new));
 
         case S_IFSOCK:
         case S_IFIFO:
                 inode->i_op = &jffs2_file_inode_operations;
-                init_special_inode(inode, inode->i_mode,
-                                   old_decode_dev((je16_to_cpu(rdev))));
+                init_special_inode(inode, inode->i_mode, rdev);
                 break;
 
         default:
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;
diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h
index f6645afe88e4..24e0f28a8bac 100644
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -268,6 +268,17 @@ static inline uint32_t ref_totlen(struct jffs2_sb_info *c,
 
 #define PAD(x) (((x)+3)&~3)
 
+static inline int jffs2_encode_dev(union jffs2_device_node *jdev, dev_t rdev)
+{
+        if (old_valid_dev(rdev)) {
+                jdev->old = cpu_to_je16(old_encode_dev(rdev));
+                return sizeof(jdev->old);
+        } else {
+                jdev->new = cpu_to_je32(new_encode_dev(rdev));
+                return sizeof(jdev->new);
+        }
+}
+
 static inline struct jffs2_inode_cache *jffs2_raw_ref_to_ic(struct jffs2_raw_node_ref *raw)
 {
         while(raw->next_in_ino) {
diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h
index d307cf548625..a10eb03ac95b 100644
--- a/fs/jffs2/os-linux.h
+++ b/fs/jffs2/os-linux.h
@@ -31,9 +31,7 @@ struct kvec;
 #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode)
 #define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid)
 #define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid)
-
-#define JFFS2_F_I_RDEV_MIN(f) (iminor(OFNI_EDONI_2SFFJ(f)))
-#define JFFS2_F_I_RDEV_MAJ(f) (imajor(OFNI_EDONI_2SFFJ(f)))
+#define JFFS2_F_I_RDEV(f) (OFNI_EDONI_2SFFJ(f)->i_rdev)
 
 #define ITIME(sec) ((struct timespec){sec, 0})
 #define I_SEC(tv) ((tv).tv_sec)
diff --git a/include/linux/jffs2.h b/include/linux/jffs2.h
index a26fbd498c79..007d76d290cb 100644
--- a/include/linux/jffs2.h
+++ b/include/linux/jffs2.h
@@ -173,4 +173,10 @@ union jffs2_node_union
         struct jffs2_unknown_node u;
 };
 
+/* Data payload for device nodes. */
+union jffs2_device_node {
+        jint16_t old;
+        jint32_t new;
+};
+
 #endif /* __LINUX_JFFS2_H__ */