Contributors: 29
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Ritesh Harjani |
415 |
42.43% |
4 |
5.88% |
| Christoph Hellwig |
218 |
22.29% |
6 |
8.82% |
| Linus Torvalds (pre-git) |
94 |
9.61% |
15 |
22.06% |
| Jan Kara |
53 |
5.42% |
4 |
5.88% |
| Linus Torvalds |
33 |
3.37% |
4 |
5.88% |
| Andrew Morton |
29 |
2.97% |
4 |
5.88% |
| Theodore Y. Ts'o |
21 |
2.15% |
2 |
2.94% |
| Al Viro |
12 |
1.23% |
5 |
7.35% |
| Danila Chernetsov |
11 |
1.12% |
1 |
1.47% |
| David Howells |
11 |
1.12% |
2 |
2.94% |
| Martin J. Bligh |
11 |
1.12% |
1 |
1.47% |
| Miklos Szeredi |
10 |
1.02% |
1 |
1.47% |
| Josef Bacik |
9 |
0.92% |
2 |
2.94% |
| Jeff Layton |
8 |
0.82% |
1 |
1.47% |
| Ross Zwisler |
7 |
0.72% |
1 |
1.47% |
| Benjamin LaHaise |
6 |
0.61% |
1 |
1.47% |
| Jens Axboe |
6 |
0.61% |
1 |
1.47% |
| Toshi Kani |
5 |
0.51% |
1 |
1.47% |
| yangerkun |
5 |
0.51% |
1 |
1.47% |
| Dave Kleikamp |
3 |
0.31% |
1 |
1.47% |
| Kent Overstreet |
2 |
0.20% |
1 |
1.47% |
| Arjan van de Ven |
2 |
0.20% |
2 |
2.94% |
| Dave Jones |
1 |
0.10% |
1 |
1.47% |
| Christian Brauner |
1 |
0.10% |
1 |
1.47% |
| Ashwin Gundarapu |
1 |
0.10% |
1 |
1.47% |
| Lorenzo Stoakes |
1 |
0.10% |
1 |
1.47% |
| Greg Kroah-Hartman |
1 |
0.10% |
1 |
1.47% |
| Andi Kleen |
1 |
0.10% |
1 |
1.47% |
| Harvey Harrison |
1 |
0.10% |
1 |
1.47% |
| Total |
978 |
|
68 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* linux/fs/ext2/file.c
*
* Copyright (C) 1992, 1993, 1994, 1995
* Remy Card (card@masi.ibp.fr)
* Laboratoire MASI - Institut Blaise Pascal
* Universite Pierre et Marie Curie (Paris VI)
*
* from
*
* linux/fs/minix/file.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*
* ext2 fs regular file handling primitives
*
* 64-bit file support on 64-bit platforms by Jakub Jelinek
* (jj@sunsite.ms.mff.cuni.cz)
*/
#include <linux/time.h>
#include <linux/pagemap.h>
#include <linux/filelock.h>
#include <linux/quotaops.h>
#include <linux/iomap.h>
#include <linux/uio.h>
#include <linux/buffer_head.h>
#include "ext2.h"
#include "xattr.h"
#include "acl.h"
#include "trace.h"
/*
* Called when filp is released. This happens when all file descriptors
* for a single struct file are closed. Note that different open() calls
* for the same file yield different struct file structures.
*/
static int ext2_release_file (struct inode * inode, struct file * filp)
{
if (filp->f_mode & FMODE_WRITE) {
mutex_lock(&EXT2_I(inode)->truncate_mutex);
ext2_discard_reservation(inode);
mutex_unlock(&EXT2_I(inode)->truncate_mutex);
}
return 0;
}
int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync)
{
int ret;
struct inode *inode = file->f_mapping->host;
struct super_block *sb = inode->i_sb;
ret = mmb_fsync(file, &EXT2_I(inode)->i_metadata_bhs,
start, end, datasync);
if (ret == -EIO)
/* We don't really know where the IO error happened... */
ext2_error(sb, __func__,
"detected IO error when writing metadata buffers");
return ret;
}
static ssize_t ext2_dio_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
ssize_t ret;
trace_ext2_dio_read_begin(iocb, to, 0);
inode_lock_shared(inode);
ret = iomap_dio_rw(iocb, to, &ext2_iomap_ops, NULL, 0, NULL, 0);
inode_unlock_shared(inode);
trace_ext2_dio_read_end(iocb, to, ret);
return ret;
}
static int ext2_dio_write_end_io(struct kiocb *iocb, ssize_t size,
int error, unsigned int flags)
{
loff_t pos = iocb->ki_pos;
struct inode *inode = file_inode(iocb->ki_filp);
if (error)
goto out;
/*
* If we are extending the file, we have to update i_size here before
* page cache gets invalidated in iomap_dio_rw(). This prevents racing
* buffered reads from zeroing out too much from page cache pages.
* Note that all extending writes always happens synchronously with
* inode lock held by ext2_dio_write_iter(). So it is safe to update
* inode size here for extending file writes.
*/
pos += size;
if (pos > i_size_read(inode)) {
i_size_write(inode, pos);
mark_inode_dirty(inode);
}
out:
trace_ext2_dio_write_endio(iocb, size, error);
return error;
}
static const struct iomap_dio_ops ext2_dio_write_ops = {
.end_io = ext2_dio_write_end_io,
};
static ssize_t ext2_dio_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
ssize_t ret;
unsigned int flags = 0;
unsigned long blocksize = inode->i_sb->s_blocksize;
loff_t offset = iocb->ki_pos;
loff_t count = iov_iter_count(from);
ssize_t status = 0;
trace_ext2_dio_write_begin(iocb, from, 0);
inode_lock(inode);
ret = generic_write_checks(iocb, from);
if (ret <= 0)
goto out_unlock;
ret = kiocb_modified(iocb);
if (ret)
goto out_unlock;
/* use IOMAP_DIO_FORCE_WAIT for unaligned or extending writes */
if (iocb->ki_pos + iov_iter_count(from) > i_size_read(inode) ||
(!IS_ALIGNED(iocb->ki_pos | iov_iter_alignment(from), blocksize)))
flags |= IOMAP_DIO_FORCE_WAIT;
ret = iomap_dio_rw(iocb, from, &ext2_iomap_ops, &ext2_dio_write_ops,
flags, NULL, 0);
/* ENOTBLK is magic return value for fallback to buffered-io */
if (ret == -ENOTBLK)
ret = 0;
if (ret < 0 && ret != -EIOCBQUEUED)
ext2_write_failed(inode->i_mapping, offset + count);
/* handle case for partial write and for fallback to buffered write */
if (ret >= 0 && iov_iter_count(from)) {
loff_t pos, endbyte;
int ret2;
iocb->ki_flags &= ~IOCB_DIRECT;
pos = iocb->ki_pos;
status = generic_perform_write(iocb, from);
if (unlikely(status < 0)) {
ret = status;
goto out_unlock;
}
ret += status;
endbyte = pos + status - 1;
ret2 = filemap_write_and_wait_range(inode->i_mapping, pos,
endbyte);
if (!ret2) {
invalidate_mapping_pages(inode->i_mapping,
pos >> PAGE_SHIFT,
endbyte >> PAGE_SHIFT);
if (ret > 0)
ret = generic_write_sync(iocb, ret);
} else {
ret = ret2;
}
}
out_unlock:
inode_unlock(inode);
if (status)
trace_ext2_dio_write_buff_end(iocb, from, status);
trace_ext2_dio_write_end(iocb, from, ret);
return ret;
}
static ssize_t ext2_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
if (iocb->ki_flags & IOCB_DIRECT)
return ext2_dio_read_iter(iocb, to);
return generic_file_read_iter(iocb, to);
}
static ssize_t ext2_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
if (iocb->ki_flags & IOCB_DIRECT)
return ext2_dio_write_iter(iocb, from);
return generic_file_write_iter(iocb, from);
}
static int ext2_file_open(struct inode *inode, struct file *filp)
{
filp->f_mode |= FMODE_CAN_ODIRECT;
return dquot_file_open(inode, filp);
}
const struct file_operations ext2_file_operations = {
.llseek = generic_file_llseek,
.read_iter = ext2_file_read_iter,
.write_iter = ext2_file_write_iter,
.unlocked_ioctl = ext2_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ext2_compat_ioctl,
#endif
.mmap_prepare = generic_file_mmap_prepare,
.open = ext2_file_open,
.release = ext2_release_file,
.fsync = ext2_fsync,
.get_unmapped_area = thp_get_unmapped_area,
.splice_read = filemap_splice_read,
.splice_write = iter_file_splice_write,
.setlease = generic_setlease,
};
const struct inode_operations ext2_file_inode_operations = {
.listxattr = ext2_listxattr,
.getattr = ext2_getattr,
.setattr = ext2_setattr,
.get_inode_acl = ext2_get_acl,
.set_acl = ext2_set_acl,
.fiemap = ext2_fiemap,
.fileattr_get = ext2_fileattr_get,
.fileattr_set = ext2_fileattr_set,
};