[patch 11/22] elevate mnt writers for callers of vfs_mkdir()

[Cedric Le Goater]

From: Dave Hansen <hansendc at us.ibm.com>

elevate mnt writers for callers of vfs_mkdir()

Pretty self-explanatory.  Fits in with the rest of the series.

Signed-off-by: Dave Hansen <hansendc at us.ibm.com>
---

---
 fs/namei.c            |    5 +++++
 fs/nfsd/nfs4recover.c |    4 ++++
 2 files changed, 9 insertions(+)

Index: 2.6.22-rc4-mm2-robindmount/fs/namei.c
===================================================================
--- 2.6.22-rc4-mm2-robindmount.orig/fs/namei.c
+++ 2.6.22-rc4-mm2-robindmount/fs/namei.c
@@ -2023,7 +2023,12 @@ asmlinkage long sys_mkdirat(int dfd, con
 
 	if (!IS_POSIXACL(nd.dentry->d_inode))
 		mode &= ~current->fs->umask;
+	error = mnt_want_write(nd.mnt);
+	if (error)
+		goto out_dput;
 	error = vfs_mkdir(nd.dentry->d_inode, dentry, mode);
+	mnt_drop_write(nd.mnt);
+out_dput:
 	dput(dentry);
 out_unlock:
 	mutex_unlock(&nd.dentry->d_inode->i_mutex);
Index: 2.6.22-rc4-mm2-robindmount/fs/nfsd/nfs4recover.c
===================================================================
--- 2.6.22-rc4-mm2-robindmount.orig/fs/nfsd/nfs4recover.c
+++ 2.6.22-rc4-mm2-robindmount/fs/nfsd/nfs4recover.c
@@ -156,7 +156,11 @@ nfsd4_create_clid_dir(struct nfs4_client
 		dprintk("NFSD: nfsd4_create_clid_dir: DIRECTORY EXISTS\n");
 		goto out_put;
 	}
+	status = mnt_want_write(rec_dir.mnt);
+	if (status)
+		goto out_put;
 	status = vfs_mkdir(rec_dir.dentry->d_inode, dentry, S_IRWXU);
+	mnt_drop_write(rec_dir.mnt);
 out_put:
 	dput(dentry);
 out_unlock:

--