From f7c85868fcacc331dd3454a4f08f006d7942521f Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 22 Jun 2011 18:53:18 -0400 Subject: fix mknod() on nfs4 (hopefully) a) check the right flags in ->create() (LOOKUP_OPEN, not LOOKUP_CREATE) b) default (!LOOKUP_OPEN) open_flags is O_CREAT|O_EXCL|FMODE_READ, not 0 c) lookup_instantiate_filp() should be done only with LOOKUP_OPEN; otherwise we need to issue CLOSE, lest we leak stateid on server. Signed-off-by: Al Viro --- fs/nfs/dir.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) (limited to 'fs') diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index cc613c354bb8..1f4625749038 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -1567,7 +1567,7 @@ static int nfs_open_create(struct inode *dir, struct dentry *dentry, int mode, struct nfs_open_context *ctx = NULL; struct iattr attr; int error; - int open_flags = 0; + int open_flags = O_CREAT|O_EXCL|FMODE_READ; dfprintk(VFS, "NFS: create(%s/%ld), %s\n", dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); @@ -1575,27 +1575,27 @@ static int nfs_open_create(struct inode *dir, struct dentry *dentry, int mode, attr.ia_mode = mode; attr.ia_valid = ATTR_MODE; - if ((nd->flags & LOOKUP_CREATE) != 0) { + if (nd && (nd->flags & LOOKUP_OPEN) != 0) open_flags = nd->intent.open.flags; - ctx = create_nfs_open_context(dentry, open_flags); - error = PTR_ERR(ctx); - if (IS_ERR(ctx)) - goto out_err_drop; - } + ctx = create_nfs_open_context(dentry, open_flags); + error = PTR_ERR(ctx); + if (IS_ERR(ctx)) + goto out_err_drop; error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, ctx); if (error != 0) goto out_put_ctx; - if (ctx != NULL) { + if (nd && (nd->flags & LOOKUP_OPEN) != 0) { error = nfs_intent_set_file(nd, ctx); if (error < 0) goto out_err; + } else { + put_nfs_open_context(ctx); } return 0; out_put_ctx: - if (ctx != NULL) - put_nfs_open_context(ctx); + put_nfs_open_context(ctx); out_err_drop: d_drop(dentry); out_err: @@ -1657,7 +1657,7 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode, { struct iattr attr; int error; - int open_flags = 0; + int open_flags = O_CREAT|O_EXCL|FMODE_READ; dfprintk(VFS, "NFS: create(%s/%ld), %s\n", dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); @@ -1665,7 +1665,7 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode, attr.ia_mode = mode; attr.ia_valid = ATTR_MODE; - if ((nd->flags & LOOKUP_CREATE) != 0) + if (nd && (nd->flags & LOOKUP_OPEN) != 0) open_flags = nd->intent.open.flags; error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, NULL); -- cgit v1.2.3