Contributors: 18
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Ryusuke Konishi |
458 |
77.36% |
12 |
33.33% |
| Jan Kara |
35 |
5.91% |
2 |
5.56% |
| Matthew Wilcox |
30 |
5.07% |
1 |
2.78% |
| Miklos Szeredi |
10 |
1.69% |
1 |
2.78% |
| Dave Jiang |
9 |
1.52% |
1 |
2.78% |
| Theodore Y. Ts'o |
7 |
1.18% |
1 |
2.78% |
| Al Viro |
7 |
1.18% |
3 |
8.33% |
| Andreas Rohner |
6 |
1.01% |
2 |
5.56% |
| Christoph Hellwig |
5 |
0.84% |
2 |
5.56% |
| Kirill A. Shutemov |
5 |
0.84% |
1 |
2.78% |
| Koji Sato |
5 |
0.84% |
1 |
2.78% |
| Joachim Henke |
5 |
0.84% |
1 |
2.78% |
| Alexey Dobriyan |
4 |
0.68% |
3 |
8.33% |
| Jiro SEKIBA |
2 |
0.34% |
1 |
2.78% |
| David Howells |
1 |
0.17% |
1 |
2.78% |
| Josef Bacik |
1 |
0.17% |
1 |
2.78% |
| Ross Zwisler |
1 |
0.17% |
1 |
2.78% |
| Souptick Joarder |
1 |
0.17% |
1 |
2.78% |
| Total |
592 |
|
36 |
|
// SPDX-License-Identifier: GPL-2.0+
/*
* NILFS regular file handling primitives including fsync().
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*
* Written by Amagai Yoshiji and Ryusuke Konishi.
*/
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/writeback.h>
#include "nilfs.h"
#include "segment.h"
int nilfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
{
/*
* Called from fsync() system call
* This is the only entry point that can catch write and synch
* timing for both data blocks and intermediate blocks.
*
* This function should be implemented when the writeback function
* will be implemented.
*/
struct the_nilfs *nilfs;
struct inode *inode = file->f_mapping->host;
int err = 0;
if (nilfs_inode_dirty(inode)) {
if (datasync)
err = nilfs_construct_dsync_segment(inode->i_sb, inode,
start, end);
else
err = nilfs_construct_segment(inode->i_sb);
}
nilfs = inode->i_sb->s_fs_info;
if (!err)
err = nilfs_flush_device(nilfs);
return err;
}
static vm_fault_t nilfs_page_mkwrite(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct folio *folio = page_folio(vmf->page);
struct inode *inode = file_inode(vma->vm_file);
struct nilfs_transaction_info ti;
struct buffer_head *bh, *head;
int ret = 0;
if (unlikely(nilfs_near_disk_full(inode->i_sb->s_fs_info)))
return VM_FAULT_SIGBUS; /* -ENOSPC */
sb_start_pagefault(inode->i_sb);
folio_lock(folio);
if (folio->mapping != inode->i_mapping ||
folio_pos(folio) >= i_size_read(inode) ||
!folio_test_uptodate(folio)) {
folio_unlock(folio);
ret = -EFAULT; /* make the VM retry the fault */
goto out;
}
/*
* check to see if the folio is mapped already (no holes)
*/
if (folio_test_mappedtodisk(folio))
goto mapped;
head = folio_buffers(folio);
if (head) {
int fully_mapped = 1;
bh = head;
do {
if (!buffer_mapped(bh)) {
fully_mapped = 0;
break;
}
} while (bh = bh->b_this_page, bh != head);
if (fully_mapped) {
folio_set_mappedtodisk(folio);
goto mapped;
}
}
folio_unlock(folio);
/*
* fill hole blocks
*/
ret = nilfs_transaction_begin(inode->i_sb, &ti, 1);
/* never returns -ENOMEM, but may return -ENOSPC */
if (unlikely(ret))
goto out;
file_update_time(vma->vm_file);
ret = block_page_mkwrite(vma, vmf, nilfs_get_block);
if (ret) {
nilfs_transaction_abort(inode->i_sb);
goto out;
}
nilfs_set_file_dirty(inode, 1 << (PAGE_SHIFT - inode->i_blkbits));
nilfs_transaction_commit(inode->i_sb);
mapped:
/*
* Since checksumming including data blocks is performed to determine
* the validity of the log to be written and used for recovery, it is
* necessary to wait for writeback to finish here, regardless of the
* stable write requirement of the backing device.
*/
folio_wait_writeback(folio);
out:
sb_end_pagefault(inode->i_sb);
return vmf_fs_error(ret);
}
static const struct vm_operations_struct nilfs_file_vm_ops = {
.fault = filemap_fault,
.map_pages = filemap_map_pages,
.page_mkwrite = nilfs_page_mkwrite,
};
static int nilfs_file_mmap(struct file *file, struct vm_area_struct *vma)
{
file_accessed(file);
vma->vm_ops = &nilfs_file_vm_ops;
return 0;
}
/*
* We have mostly NULL's here: the current defaults are ok for
* the nilfs filesystem.
*/
const struct file_operations nilfs_file_operations = {
.llseek = generic_file_llseek,
.read_iter = generic_file_read_iter,
.write_iter = generic_file_write_iter,
.unlocked_ioctl = nilfs_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = nilfs_compat_ioctl,
#endif /* CONFIG_COMPAT */
.mmap = nilfs_file_mmap,
.open = generic_file_open,
/* .release = nilfs_release_file, */
.fsync = nilfs_sync_file,
.splice_read = filemap_splice_read,
.splice_write = iter_file_splice_write,
};
const struct inode_operations nilfs_file_inode_operations = {
.setattr = nilfs_setattr,
.permission = nilfs_permission,
.fiemap = nilfs_fiemap,
.fileattr_get = nilfs_fileattr_get,
.fileattr_set = nilfs_fileattr_set,
};
/* end of file */