v4.19.13 snapshot.
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
new file mode 100644
index 0000000..36665fd
--- /dev/null
+++ b/fs/jfs/file.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) International Business Machines Corp., 2000-2002
+ * Portions Copyright (C) Christoph Hellwig, 2001-2002
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/posix_acl.h>
+#include <linux/quotaops.h>
+#include "jfs_incore.h"
+#include "jfs_inode.h"
+#include "jfs_dmap.h"
+#include "jfs_txnmgr.h"
+#include "jfs_xattr.h"
+#include "jfs_acl.h"
+#include "jfs_debug.h"
+
+int jfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+ struct inode *inode = file->f_mapping->host;
+ int rc = 0;
+
+ rc = file_write_and_wait_range(file, start, end);
+ if (rc)
+ return rc;
+
+ inode_lock(inode);
+ if (!(inode->i_state & I_DIRTY_ALL) ||
+ (datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
+ /* Make sure committed changes hit the disk */
+ jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
+ inode_unlock(inode);
+ return rc;
+ }
+
+ rc |= jfs_commit_inode(inode, 1);
+ inode_unlock(inode);
+
+ return rc ? -EIO : 0;
+}
+
+static int jfs_open(struct inode *inode, struct file *file)
+{
+ int rc;
+
+ if ((rc = dquot_file_open(inode, file)))
+ return rc;
+
+ /*
+ * We attempt to allow only one "active" file open per aggregate
+ * group. Otherwise, appending to files in parallel can cause
+ * fragmentation within the files.
+ *
+ * If the file is empty, it was probably just created and going
+ * to be written to. If it has a size, we'll hold off until the
+ * file is actually grown.
+ */
+ if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
+ (inode->i_size == 0)) {
+ struct jfs_inode_info *ji = JFS_IP(inode);
+ spin_lock_irq(&ji->ag_lock);
+ if (ji->active_ag == -1) {
+ struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb);
+ ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb);
+ atomic_inc(&jfs_sb->bmap->db_active[ji->active_ag]);
+ }
+ spin_unlock_irq(&ji->ag_lock);
+ }
+
+ return 0;
+}
+static int jfs_release(struct inode *inode, struct file *file)
+{
+ struct jfs_inode_info *ji = JFS_IP(inode);
+
+ spin_lock_irq(&ji->ag_lock);
+ if (ji->active_ag != -1) {
+ struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
+ atomic_dec(&bmap->db_active[ji->active_ag]);
+ ji->active_ag = -1;
+ }
+ spin_unlock_irq(&ji->ag_lock);
+
+ return 0;
+}
+
+int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
+{
+ struct inode *inode = d_inode(dentry);
+ int rc;
+
+ rc = setattr_prepare(dentry, iattr);
+ if (rc)
+ return rc;
+
+ if (is_quota_modification(inode, iattr)) {
+ rc = dquot_initialize(inode);
+ if (rc)
+ return rc;
+ }
+ if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) ||
+ (iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) {
+ rc = dquot_transfer(inode, iattr);
+ if (rc)
+ return rc;
+ }
+
+ if ((iattr->ia_valid & ATTR_SIZE) &&
+ iattr->ia_size != i_size_read(inode)) {
+ inode_dio_wait(inode);
+
+ rc = inode_newsize_ok(inode, iattr->ia_size);
+ if (rc)
+ return rc;
+
+ truncate_setsize(inode, iattr->ia_size);
+ jfs_truncate(inode);
+ }
+
+ setattr_copy(inode, iattr);
+ mark_inode_dirty(inode);
+
+ if (iattr->ia_valid & ATTR_MODE)
+ rc = posix_acl_chmod(inode, inode->i_mode);
+ return rc;
+}
+
+const struct inode_operations jfs_file_inode_operations = {
+ .listxattr = jfs_listxattr,
+ .setattr = jfs_setattr,
+#ifdef CONFIG_JFS_POSIX_ACL
+ .get_acl = jfs_get_acl,
+ .set_acl = jfs_set_acl,
+#endif
+};
+
+const struct file_operations jfs_file_operations = {
+ .open = jfs_open,
+ .llseek = generic_file_llseek,
+ .read_iter = generic_file_read_iter,
+ .write_iter = generic_file_write_iter,
+ .mmap = generic_file_mmap,
+ .splice_read = generic_file_splice_read,
+ .splice_write = iter_file_splice_write,
+ .fsync = jfs_fsync,
+ .release = jfs_release,
+ .unlocked_ioctl = jfs_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = jfs_compat_ioctl,
+#endif
+};