X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=fs%2Fext2%2Fsuper.c;h=ab65b5f7965f684b06bc444adde2a2dee7f93ee1;hb=987b0145d94eecf292d8b301228356f44611ab7c;hp=f05b2cff499c1ad22431fbfa967f21a0fc86d4af;hpb=e6a27dba1cf83d871b2dfcd64f04f12a67e3f4d5;p=linux-2.6.git

diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index f05b2cff4..ab65b5f79 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -175,8 +175,7 @@ static int init_inodecache(void)
 {
 	ext2_inode_cachep = kmem_cache_create("ext2_inode_cache",
 					     sizeof(struct ext2_inode_info),
-					     0, (SLAB_RECLAIM_ACCOUNT|
-						SLAB_MEM_SPREAD),
+					     0, SLAB_RECLAIM_ACCOUNT,
 					     init_once, NULL);
 	if (ext2_inode_cachep == NULL)
 		return -ENOMEM;
@@ -211,6 +210,8 @@ static int ext2_show_options(struct seq_file *seq, struct vfsmount *vfs)
 
 	if (sbi->s_mount_opt & EXT2_MOUNT_GRPID)
 		seq_puts(seq, ",grpid");
+	else
+		seq_puts(seq, ",nogrpid");
 
 #if defined(CONFIG_QUOTA)
 	if (sbi->s_mount_opt & EXT2_MOUNT_USRQUOTA)
@@ -252,13 +253,55 @@ static struct super_operations ext2_sops = {
 #endif
 };
 
+static struct dentry *ext2_get_dentry(struct super_block *sb, void *vobjp)
+{
+	__u32 *objp = vobjp;
+	unsigned long ino = objp[0];
+	__u32 generation = objp[1];
+	struct inode *inode;
+	struct dentry *result;
+
+	if (ino != EXT2_ROOT_INO && ino < EXT2_FIRST_INO(sb))
+		return ERR_PTR(-ESTALE);
+	if (ino > le32_to_cpu(EXT2_SB(sb)->s_es->s_inodes_count))
+		return ERR_PTR(-ESTALE);
+
+	/* iget isn't really right if the inode is currently unallocated!!
+	 * ext2_read_inode currently does appropriate checks, but
+	 * it might be "neater" to call ext2_get_inode first and check
+	 * if the inode is valid.....
+	 */
+	inode = iget(sb, ino);
+	if (inode == NULL)
+		return ERR_PTR(-ENOMEM);
+	if (is_bad_inode(inode)
+	    || (generation && inode->i_generation != generation)
+		) {
+		/* we didn't find the right inode.. */
+		iput(inode);
+		return ERR_PTR(-ESTALE);
+	}
+	/* now to find a dentry.
+	 * If possible, get a well-connected one
+	 */
+	result = d_alloc_anon(inode);
+	if (!result) {
+		iput(inode);
+		return ERR_PTR(-ENOMEM);
+	}
+	return result;
+}
+
+
 /* Yes, most of these are left as NULL!!
  * A NULL value implies the default, which works with ext2-like file
  * systems, but can be improved upon.
  * Currently only get_parent is required.
  */
+struct dentry *ext2_get_parent(struct dentry *child);
 static struct export_operations ext2_export_ops = {
 	.get_parent = ext2_get_parent,
+	.get_dentry = ext2_get_dentry,
 };
 
 static unsigned long get_sb_block(void **data)