From: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Date: Wed, 31 Dec 2008 04:08:37 +0000 (-0600)
Subject: nfsd race fixes: jfs
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1f3403fa640f9f7b135dee79f2d39d01c8ad4a08;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

nfsd race fixes: jfs

jfs version of Al Viro's nfsd race patches

Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/jfs/jfs_inode.c b/fs/jfs/jfs_inode.c
index 70022fd1c539..d4d142c2edd4 100644
--- a/fs/jfs/jfs_inode.c
+++ b/fs/jfs/jfs_inode.c
@@ -79,7 +79,8 @@ struct inode *ialloc(struct inode *parent, umode_t mode)
 	inode = new_inode(sb);
 	if (!inode) {
 		jfs_warn("ialloc: new_inode returned NULL!");
-		return ERR_PTR(-ENOMEM);
+		rc = -ENOMEM;
+		goto fail;
 	}
 
 	jfs_inode = JFS_IP(inode);
@@ -89,8 +90,12 @@ struct inode *ialloc(struct inode *parent, umode_t mode)
 		jfs_warn("ialloc: diAlloc returned %d!", rc);
 		if (rc == -EIO)
 			make_bad_inode(inode);
-		iput(inode);
-		return ERR_PTR(rc);
+		goto fail_put;
+	}
+
+	if (insert_inode_locked(inode) < 0) {
+		rc = -EINVAL;
+		goto fail_unlock;
 	}
 
 	inode->i_uid = current_fsuid();
@@ -112,11 +117,8 @@ struct inode *ialloc(struct inode *parent, umode_t mode)
 	 * Allocate inode to quota.
 	 */
 	if (DQUOT_ALLOC_INODE(inode)) {
-		DQUOT_DROP(inode);
-		inode->i_flags |= S_NOQUOTA;
-		inode->i_nlink = 0;
-		iput(inode);
-		return ERR_PTR(-EDQUOT);
+		rc = -EDQUOT;
+		goto fail_drop;
 	}
 
 	inode->i_mode = mode;
@@ -158,4 +160,15 @@ struct inode *ialloc(struct inode *parent, umode_t mode)
 	jfs_info("ialloc returns inode = 0x%p\n", inode);
 
 	return inode;
+
+fail_drop:
+	DQUOT_DROP(inode);
+	inode->i_flags |= S_NOQUOTA;
+fail_unlock:
+	inode->i_nlink = 0;
+	unlock_new_inode(inode);
+fail_put:
+	iput(inode);
+fail:
+	return ERR_PTR(rc);
 }
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index cc3cedffbfa1..b4de56b851e4 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -155,7 +155,6 @@ static int jfs_create(struct inode *dip, struct dentry *dentry, int mode,
 	ip->i_fop = &jfs_file_operations;
 	ip->i_mapping->a_ops = &jfs_aops;
 
-	insert_inode_hash(ip);
 	mark_inode_dirty(ip);
 
 	dip->i_ctime = dip->i_mtime = CURRENT_TIME;
@@ -171,9 +170,12 @@ static int jfs_create(struct inode *dip, struct dentry *dentry, int mode,
 	if (rc) {
 		free_ea_wmap(ip);
 		ip->i_nlink = 0;
+		unlock_new_inode(ip);
 		iput(ip);
-	} else
+	} else {
 		d_instantiate(dentry, ip);
+		unlock_new_inode(ip);
+	}
 
       out2:
 	free_UCSname(&dname);
@@ -289,7 +291,6 @@ static int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode)
 	ip->i_op = &jfs_dir_inode_operations;
 	ip->i_fop = &jfs_dir_operations;
 
-	insert_inode_hash(ip);
 	mark_inode_dirty(ip);
 
 	/* update parent directory inode */
@@ -306,9 +307,12 @@ static int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode)
 	if (rc) {
 		free_ea_wmap(ip);
 		ip->i_nlink = 0;
+		unlock_new_inode(ip);
 		iput(ip);
-	} else
+	} else {
 		d_instantiate(dentry, ip);
+		unlock_new_inode(ip);
+	}
 
       out2:
 	free_UCSname(&dname);
@@ -1019,7 +1023,6 @@ static int jfs_symlink(struct inode *dip, struct dentry *dentry,
 		goto out3;
 	}
 
-	insert_inode_hash(ip);
 	mark_inode_dirty(ip);
 
 	dip->i_ctime = dip->i_mtime = CURRENT_TIME;
@@ -1039,9 +1042,12 @@ static int jfs_symlink(struct inode *dip, struct dentry *dentry,
 	if (rc) {
 		free_ea_wmap(ip);
 		ip->i_nlink = 0;
+		unlock_new_inode(ip);
 		iput(ip);
-	} else
+	} else {
 		d_instantiate(dentry, ip);
+		unlock_new_inode(ip);
+	}
 
       out2:
 	free_UCSname(&dname);
@@ -1399,7 +1405,6 @@ static int jfs_mknod(struct inode *dir, struct dentry *dentry,
 	jfs_ip->dev = new_encode_dev(rdev);
 	init_special_inode(ip, ip->i_mode, rdev);
 
-	insert_inode_hash(ip);
 	mark_inode_dirty(ip);
 
 	dir->i_ctime = dir->i_mtime = CURRENT_TIME;
@@ -1417,9 +1422,12 @@ static int jfs_mknod(struct inode *dir, struct dentry *dentry,
 	if (rc) {
 		free_ea_wmap(ip);
 		ip->i_nlink = 0;
+		unlock_new_inode(ip);
 		iput(ip);
-	} else
+	} else {
 		d_instantiate(dentry, ip);
+		unlock_new_inode(ip);
+	}
 
       out1:
 	free_UCSname(&dname);