Extend PF_FSTRANS critical regions

Additional testing has shown that the region covered by PF_FSTRANS
needs to be extended to cover the  zpl_xattr_security_init() and
init_acl() functions.  The zpl_mark_dirty() function can also recurse
and therefore must always be protected.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <tuxoko@gmail.com>
Closes #3331

Author: behlendorf

module/zfs/zpl_inode.c

@@ -106,13 +106,13 @@ zpl_create(struct inode *dir, struct dentry *dentry, zpl_umode_t mode,
 
 	cookie = spl_fstrans_mark();
 	error = -zfs_create(dir, dname(dentry), vap, 0, mode, &ip, cr, 0, NULL);
-	spl_fstrans_unmark(cookie);
 	if (error == 0) {
 		VERIFY0(zpl_xattr_security_init(ip, dir, &dentry->d_name));
 		VERIFY0(zpl_init_acl(ip, dir));
 		d_instantiate(dentry, ip);
 	}
 
+	spl_fstrans_unmark(cookie);
 	kmem_free(vap, sizeof (vattr_t));
 	crfree(cr);
 	ASSERT3S(error, <=, 0);
@@ -144,13 +144,13 @@ zpl_mknod(struct inode *dir, struct dentry *dentry, zpl_umode_t mode,
 
 	cookie = spl_fstrans_mark();
 	error = -zfs_create(dir, dname(dentry), vap, 0, mode, &ip, cr, 0, NULL);
-	spl_fstrans_unmark(cookie);
 	if (error == 0) {
 		VERIFY0(zpl_xattr_security_init(ip, dir, &dentry->d_name));
 		VERIFY0(zpl_init_acl(ip, dir));
 		d_instantiate(dentry, ip);
 	}
 
+	spl_fstrans_unmark(cookie);
 	kmem_free(vap, sizeof (vattr_t));
 	crfree(cr);
 	ASSERT3S(error, <=, 0);
@@ -190,13 +190,13 @@ zpl_mkdir(struct inode *dir, struct dentry *dentry, zpl_umode_t mode)
 
 	cookie = spl_fstrans_mark();
 	error = -zfs_mkdir(dir, dname(dentry), vap, &ip, cr, 0, NULL);
-	spl_fstrans_unmark(cookie);
 	if (error == 0) {
 		VERIFY0(zpl_xattr_security_init(ip, dir, &dentry->d_name));
 		VERIFY0(zpl_init_acl(ip, dir));
 		d_instantiate(dentry, ip);
 	}
 
+	spl_fstrans_unmark(cookie);
 	kmem_free(vap, sizeof (vattr_t));
 	crfree(cr);
 	ASSERT3S(error, <=, 0);
@@ -273,10 +273,10 @@ zpl_setattr(struct dentry *dentry, struct iattr *ia)
 
 	cookie = spl_fstrans_mark();
 	error = -zfs_setattr(ip, vap, 0, cr);
-	spl_fstrans_unmark(cookie);
 	if (!error && (ia->ia_valid & ATTR_MODE))
 		error = zpl_chmod_acl(ip);
 
+	spl_fstrans_unmark(cookie);
 	kmem_free(vap, sizeof (vattr_t));
 	crfree(cr);
 	ASSERT3S(error, <=, 0);
@@ -317,12 +317,12 @@ zpl_symlink(struct inode *dir, struct dentry *dentry, const char *name)
 
 	cookie = spl_fstrans_mark();
 	error = -zfs_symlink(dir, dname(dentry), vap, (char *)name, &ip, cr, 0);
-	spl_fstrans_unmark(cookie);
 	if (error == 0) {
 		VERIFY0(zpl_xattr_security_init(ip, dir, &dentry->d_name));
 		d_instantiate(dentry, ip);
 	}
 
+	spl_fstrans_unmark(cookie);
 	kmem_free(vap, sizeof (vattr_t));
 	crfree(cr);
 	ASSERT3S(error, <=, 0);
@@ -391,14 +391,14 @@ zpl_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
 
 	cookie = spl_fstrans_mark();
 	error = -zfs_link(dir, ip, dname(dentry), cr);
-	spl_fstrans_unmark(cookie);
 	if (error) {
 		iput(ip);
 		goto out;
 	}
 
 	d_instantiate(dentry, ip);
 out:
+	spl_fstrans_unmark(cookie);
 	crfree(cr);
 	ASSERT3S(error, <=, 0);
 

module/zfs/zpl_super.c

@@ -57,13 +57,21 @@ zpl_inode_destroy(struct inode *ip)
 static void
 zpl_dirty_inode(struct inode *ip, int flags)
 {
+	fstrans_cookie_t cookie;
+
+	cookie = spl_fstrans_mark();
 	zfs_dirty_inode(ip, flags);
+	spl_fstrans_unmark(cookie);
 }
 #else
 static void
 zpl_dirty_inode(struct inode *ip)
 {
+	fstrans_cookie_t cookie;
+
+	cookie = spl_fstrans_mark();
 	zfs_dirty_inode(ip, 0);
+	spl_fstrans_unmark(cookie);
 }
 #endif /* HAVE_DIRTY_INODE_WITH_FLAGS */