scftorture: Count single_rpc offline failures in statistics outputgrafted

scf_torture_stats_print() aggregates each invoker thread's counters
into a local scf_statistics structure before printing, but the
n_single_rpc_ofl field is missing from the aggregation loop.  As a
result, the "single_rpc_ofl" value printed in the statistics line is
always zero, even when smp_call_function_single() invocations for the
RPC test have failed due to offline CPUs and been counted by the
invoker threads.

Add the missing accumulation so that the printed value reflects the
actual counts.

Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

1 files changed, 261 insertions, 0 deletions

diff --git a/fs/udf/file.c b/fs/udf/file.c
new file mode 100644
index 000000000..f7f1422de
--- /dev/null
+++ b/fs/udf/file.c
@@ -0,0 +1,261 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * file.c
+ *
+ * PURPOSE
+ *  File handling routines for the OSTA-UDF(tm) filesystem.
+ *
+ * COPYRIGHT
+ *  (C) 1998-1999 Dave Boynton
+ *  (C) 1998-2004 Ben Fennema
+ *  (C) 1999-2000 Stelias Computing Inc
+ *
+ * HISTORY
+ *
+ *  10/02/98 dgb  Attempt to integrate into udf.o
+ *  10/07/98      Switched to using generic_readpage, etc., like isofs
+ *                And it works!
+ *  12/06/98 blf  Added udf_file_read. uses generic_file_read for all cases but
+ *                ICBTAG_FLAG_AD_IN_ICB.
+ *  04/06/99      64 bit file handling on 32 bit systems taken from ext2 file.c
+ *  05/12/99      Preliminary file write support
+ */
+
+#include "udfdecl.h"
+#include <linux/fs.h>
+#include <linux/uaccess.h>
+#include <linux/kernel.h>
+#include <linux/string.h> /* memset */
+#include <linux/capability.h>
+#include <linux/errno.h>
+#include <linux/filelock.h>
+#include <linux/pagemap.h>
+#include <linux/uio.h>
+
+#include "udf_i.h"
+#include "udf_sb.h"
+
+static vm_fault_t udf_page_mkwrite(struct vm_fault *vmf)
+{
+	struct vm_area_struct *vma = vmf->vma;
+	struct inode *inode = file_inode(vma->vm_file);
+	struct address_space *mapping = inode->i_mapping;
+	struct folio *folio = page_folio(vmf->page);
+	loff_t size;
+	unsigned int end;
+	vm_fault_t ret = VM_FAULT_LOCKED;
+	int err;
+
+	sb_start_pagefault(inode->i_sb);
+	file_update_time(vma->vm_file);
+	filemap_invalidate_lock_shared(mapping);
+	folio_lock(folio);
+	size = i_size_read(inode);
+	if (folio->mapping != inode->i_mapping || folio_pos(folio) >= size) {
+		folio_unlock(folio);
+		ret = VM_FAULT_NOPAGE;
+		goto out_unlock;
+	}
+	/* Space is already allocated for in-ICB file */
+	if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+		goto out_dirty;
+	if (folio->index == size >> PAGE_SHIFT)
+		end = size & ~PAGE_MASK;
+	else
+		end = PAGE_SIZE;
+	err = __block_write_begin(folio, 0, end, udf_get_block);
+	if (err) {
+		folio_unlock(folio);
+		ret = vmf_fs_error(err);
+		goto out_unlock;
+	}
+
+	block_commit_write(folio, 0, end);
+out_dirty:
+	folio_mark_dirty(folio);
+	folio_wait_stable(folio);
+out_unlock:
+	filemap_invalidate_unlock_shared(mapping);
+	sb_end_pagefault(inode->i_sb);
+	return ret;
+}
+
+static const struct vm_operations_struct udf_file_vm_ops = {
+	.fault		= filemap_fault,
+	.map_pages	= filemap_map_pages,
+	.page_mkwrite	= udf_page_mkwrite,
+};
+
+static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
+{
+	ssize_t retval;
+	struct file *file = iocb->ki_filp;
+	struct inode *inode = file_inode(file);
+	struct udf_inode_info *iinfo = UDF_I(inode);
+
+	inode_lock(inode);
+
+	retval = generic_write_checks(iocb, from);
+	if (retval <= 0)
+		goto out;
+
+	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
+	    inode->i_sb->s_blocksize < (udf_file_entry_alloc_offset(inode) +
+				 iocb->ki_pos + iov_iter_count(from))) {
+		filemap_invalidate_lock(inode->i_mapping);
+		retval = udf_expand_file_adinicb(inode);
+		filemap_invalidate_unlock(inode->i_mapping);
+		if (retval)
+			goto out;
+	}
+
+	retval = __generic_file_write_iter(iocb, from);
+out:
+	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && retval > 0) {
+		down_write(&iinfo->i_data_sem);
+		iinfo->i_lenAlloc = inode->i_size;
+		up_write(&iinfo->i_data_sem);
+	}
+	inode_unlock(inode);
+
+	if (retval > 0) {
+		mark_inode_dirty(inode);
+		retval = generic_write_sync(iocb, retval);
+	}
+
+	return retval;
+}
+
+long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	long old_block, new_block;
+	int result;
+
+	if (file_permission(filp, MAY_READ) != 0) {
+		udf_debug("no permission to access inode %llu\n", inode->i_ino);
+		return -EPERM;
+	}
+
+	if (!arg && ((cmd == UDF_GETVOLIDENT) || (cmd == UDF_GETEASIZE) ||
+		     (cmd == UDF_RELOCATE_BLOCKS) || (cmd == UDF_GETEABLOCK))) {
+		udf_debug("invalid argument to udf_ioctl\n");
+		return -EINVAL;
+	}
+
+	switch (cmd) {
+	case UDF_GETVOLIDENT:
+		if (copy_to_user((char __user *)arg,
+				 UDF_SB(inode->i_sb)->s_volume_ident, 32))
+			return -EFAULT;
+		return 0;
+	case UDF_RELOCATE_BLOCKS:
+		if (!capable(CAP_SYS_ADMIN))
+			return -EPERM;
+		if (get_user(old_block, (long __user *)arg))
+			return -EFAULT;
+		result = udf_relocate_blocks(inode->i_sb,
+						old_block, &new_block);
+		if (result == 0)
+			result = put_user(new_block, (long __user *)arg);
+		return result;
+	case UDF_GETEASIZE:
+		return put_user(UDF_I(inode)->i_lenEAttr, (int __user *)arg);
+	case UDF_GETEABLOCK:
+		return copy_to_user((char __user *)arg,
+				    UDF_I(inode)->i_data,
+				    UDF_I(inode)->i_lenEAttr) ? -EFAULT : 0;
+	default:
+		return -ENOIOCTLCMD;
+	}
+
+	return 0;
+}
+
+static int udf_release_file(struct inode *inode, struct file *filp)
+{
+	if (filp->f_mode & FMODE_WRITE &&
+	    atomic_read(&inode->i_writecount) == 1) {
+		/*
+		 * Grab i_mutex to avoid races with writes changing i_size
+		 * while we are running.
+		 */
+		inode_lock(inode);
+		down_write(&UDF_I(inode)->i_data_sem);
+		udf_discard_prealloc(inode);
+		udf_truncate_tail_extent(inode);
+		up_write(&UDF_I(inode)->i_data_sem);
+		inode_unlock(inode);
+	}
+	return 0;
+}
+
+static int udf_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	file_accessed(file);
+	vma->vm_ops = &udf_file_vm_ops;
+
+	return 0;
+}
+
+int udf_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+	return mmb_fsync(file,
+			&UDF_I(file->f_mapping->host)->i_metadata_bhs,
+			start, end, datasync);
+}
+
+const struct file_operations udf_file_operations = {
+	.read_iter		= generic_file_read_iter,
+	.unlocked_ioctl		= udf_ioctl,
+	.open			= generic_file_open,
+	.mmap			= udf_file_mmap,
+	.write_iter		= udf_file_write_iter,
+	.release		= udf_release_file,
+	.fsync			= udf_fsync,
+	.splice_read		= filemap_splice_read,
+	.splice_write		= iter_file_splice_write,
+	.llseek			= generic_file_llseek,
+	.setlease		= generic_setlease,
+};
+
+static int udf_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
+		       struct iattr *attr)
+{
+	struct inode *inode = d_inode(dentry);
+	struct super_block *sb = inode->i_sb;
+	int error;
+
+	error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
+	if (error)
+		return error;
+
+	if ((attr->ia_valid & ATTR_UID) &&
+	    UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET) &&
+	    !uid_eq(attr->ia_uid, UDF_SB(sb)->s_uid))
+		return -EPERM;
+	if ((attr->ia_valid & ATTR_GID) &&
+	    UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET) &&
+	    !gid_eq(attr->ia_gid, UDF_SB(sb)->s_gid))
+		return -EPERM;
+
+	if ((attr->ia_valid & ATTR_SIZE) &&
+	    attr->ia_size != i_size_read(inode)) {
+		filemap_invalidate_lock(inode->i_mapping);
+		error = udf_setsize(inode, attr->ia_size);
+		filemap_invalidate_unlock(inode->i_mapping);
+		if (error)
+			return error;
+	}
+
+	if (attr->ia_valid & ATTR_MODE)
+		udf_update_extra_perms(inode, attr->ia_mode);
+
+	setattr_copy(&nop_mnt_idmap, inode, attr);
+	mark_inode_dirty(inode);
+	return 0;
+}
+
+const struct inode_operations udf_file_inode_operations = {
+	.setattr		= udf_setattr,
+};