ceph: include the initial ACL in create/mkdir/mknod MDS requests

Current code set new file/directory's initial ACL in a non-atomic
manner.
Client first sends request to MDS to create new file/directory, then set
the initial ACL after the new file/directory is successfully created.

The fix is include the initial ACL in create/mkdir/mknod MDS requests.
So MDS can handle creating file/directory and setting the initial ACL in
one request.

Signed-off-by: Yan, Zheng <zyan@redhat.com>
Reviewed-by: Sage Weil <sage@redhat.com>

1 files changed, 31 insertions, 10 deletions

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index c29d6ae68874..26be84929439 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -682,17 +682,22 @@ static int ceph_mknod(struct inode *dir, struct dentry *dentry,
 	struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
 	struct ceph_mds_client *mdsc = fsc->mdsc;
 	struct ceph_mds_request *req;
+	struct ceph_acls_info acls = {};
 	int err;
 
 	if (ceph_snap(dir) != CEPH_NOSNAP)
 		return -EROFS;
 
+	err = ceph_pre_init_acls(dir, &mode, &acls);
+	if (err < 0)
+		return err;
+
 	dout("mknod in dir %p dentry %p mode 0%ho rdev %d\n",
 	     dir, dentry, mode, rdev);
 	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_MKNOD, USE_AUTH_MDS);
 	if (IS_ERR(req)) {
-		d_drop(dentry);
-		return PTR_ERR(req);
+		err = PTR_ERR(req);
+		goto out;
 	}
 	req->r_dentry = dget(dentry);
 	req->r_num_caps = 2;
@@ -701,15 +706,20 @@ static int ceph_mknod(struct inode *dir, struct dentry *dentry,
 	req->r_args.mknod.rdev = cpu_to_le32(rdev);
 	req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
 	req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
+	if (acls.pagelist) {
+		req->r_pagelist = acls.pagelist;
+		acls.pagelist = NULL;
+	}
 	err = ceph_mdsc_do_request(mdsc, dir, req);
 	if (!err && !req->r_reply_info.head->is_dentry)
 		err = ceph_handle_notrace_create(dir, dentry);
 	ceph_mdsc_put_request(req);
-
+out:
 	if (!err)
-		ceph_init_acl(dentry, dentry->d_inode, dir);
+		ceph_init_inode_acls(dentry->d_inode, &acls);
 	else
 		d_drop(dentry);
+	ceph_release_acls_info(&acls);
 	return err;
 }
 
@@ -733,8 +743,8 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry,
 	dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest);
 	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS);
 	if (IS_ERR(req)) {
-		d_drop(dentry);
-		return PTR_ERR(req);
+		err = PTR_ERR(req);
+		goto out;
 	}
 	req->r_dentry = dget(dentry);
 	req->r_num_caps = 2;
@@ -746,9 +756,8 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry,
 	if (!err && !req->r_reply_info.head->is_dentry)
 		err = ceph_handle_notrace_create(dir, dentry);
 	ceph_mdsc_put_request(req);
-	if (!err)
-		ceph_init_acl(dentry, dentry->d_inode, dir);
-	else
+out:
+	if (err)
 		d_drop(dentry);
 	return err;
 }
@@ -758,6 +767,7 @@ static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 	struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
 	struct ceph_mds_client *mdsc = fsc->mdsc;
 	struct ceph_mds_request *req;
+	struct ceph_acls_info acls = {};
 	int err = -EROFS;
 	int op;
 
@@ -772,6 +782,12 @@ static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 	} else {
 		goto out;
 	}
+
+	mode |= S_IFDIR;
+	err = ceph_pre_init_acls(dir, &mode, &acls);
+	if (err < 0)
+		goto out;
+
 	req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);
 	if (IS_ERR(req)) {
 		err = PTR_ERR(req);
@@ -784,15 +800,20 @@ static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 	req->r_args.mkdir.mode = cpu_to_le32(mode);
 	req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
 	req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
+	if (acls.pagelist) {
+		req->r_pagelist = acls.pagelist;
+		acls.pagelist = NULL;
+	}
 	err = ceph_mdsc_do_request(mdsc, dir, req);
 	if (!err && !req->r_reply_info.head->is_dentry)
 		err = ceph_handle_notrace_create(dir, dentry);
 	ceph_mdsc_put_request(req);
 out:
 	if (!err)
-		ceph_init_acl(dentry, dentry->d_inode, dir);
+		ceph_init_inode_acls(dentry->d_inode, &acls);
 	else
 		d_drop(dentry);
+	ceph_release_acls_info(&acls);
 	return err;
 }