[PATCH 08/25] elevate mnt writers for callers of vfs_mkdir()

Dave Hansen haveblue at us.ibm.com
Mon Dec 11 14:30:07 PST 2006




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

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

diff -puN fs/namei.c~07-24-elevate-mnt-writers-for-callers-of-vfs-mkdir fs/namei.c
--- lxc/fs/namei.c~07-24-elevate-mnt-writers-for-callers-of-vfs-mkdir	2006-12-11 14:22:01.000000000 -0800
+++ lxc-dave/fs/namei.c	2006-12-11 14:22:01.000000000 -0800
@@ -1959,7 +1959,12 @@ 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);
diff -puN fs/nfsd/nfs4recover.c~07-24-elevate-mnt-writers-for-callers-of-vfs-mkdir fs/nfsd/nfs4recover.c
--- lxc/fs/nfsd/nfs4recover.c~07-24-elevate-mnt-writers-for-callers-of-vfs-mkdir	2006-12-11 14:22:01.000000000 -0800
+++ lxc-dave/fs/nfsd/nfs4recover.c	2006-12-11 14:22:01.000000000 -0800
@@ -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:
_



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