nfsd race fixes: jfs
Dave Kleikamp [Wed, 31 Dec 2008 04:08:37 +0000 (22:08 -0600)]
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>

fs/jfs/jfs_inode.c
fs/jfs/namei.c

index 70022fd..d4d142c 100644 (file)
@@ -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);
 }
index cc3cedf..b4de56b 100644 (file)
@@ -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);