Release 4.11 fs/9p/vfs_file.c

/*
 *  linux/fs/9p/vfs_file.c
 *
 * This file contians vfs file ops for 9P2000.
 *
 *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
 *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2
 *  as published by the Free Software Foundation.
 *
 *  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:
 *  Free Software Foundation
 *  51 Franklin Street, Fifth Floor
 *  Boston, MA  02111-1301  USA
 *
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/file.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/inet.h>
#include <linux/list.h>
#include <linux/pagemap.h>
#include <linux/utsname.h>
#include <linux/uaccess.h>
#include <linux/idr.h>
#include <linux/uio.h>
#include <linux/slab.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>

#include "v9fs.h"
#include "v9fs_vfs.h"
#include "fid.h"
#include "cache.h"


static const struct vm_operations_struct v9fs_file_vm_ops;

static const struct vm_operations_struct v9fs_mmap_file_vm_ops;

/**
 * v9fs_file_open - open a file (or directory)
 * @inode: inode to be opened
 * @file: file being opened
 *
 */



int v9fs_file_open(struct inode *inode, struct file *file)
{
	int err;
	struct v9fs_inode *v9inode;
	struct v9fs_session_info *v9ses;
	struct p9_fid *fid;
	int omode;

	p9_debug(P9_DEBUG_VFS, "inode: %p file: %p\n", inode, file);
	v9inode = V9FS_I(inode);
	v9ses = v9fs_inode2v9ses(inode);
	if (v9fs_proto_dotl(v9ses))
		omode = v9fs_open_to_dotl_flags(file->f_flags);
	else
		omode = v9fs_uflags2omode(file->f_flags,
					v9fs_proto_dotu(v9ses));
	fid = file->private_data;
	if (!fid) {
		fid = v9fs_fid_clone(file_dentry(file));
		if (IS_ERR(fid))
			return PTR_ERR(fid);

		err = p9_client_open(fid, omode);
		if (err < 0) {
			p9_client_clunk(fid);
			return err;
		}
		if ((file->f_flags & O_APPEND) &&
			(!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)))
			generic_file_llseek(file, 0, SEEK_END);
	}

	file->private_data = fid;
	mutex_lock(&v9inode->v_mutex);
	if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
	    !v9inode->writeback_fid &&
	    ((file->f_flags & O_ACCMODE) != O_RDONLY)) {
		/*
                 * clone a fid and add it to writeback_fid
                 * we do it during open time instead of
                 * page dirty time via write_begin/page_mkwrite
                 * because we want write after unlink usecase
                 * to work.
                 */
		fid = v9fs_writeback_fid(file_dentry(file));
		if (IS_ERR(fid)) {
			err = PTR_ERR(fid);
			mutex_unlock(&v9inode->v_mutex);
			goto out_error;
		}
		v9inode->writeback_fid = (void *) fid;
	}
	mutex_unlock(&v9inode->v_mutex);
	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
		v9fs_cache_inode_set_cookie(inode, file);
	return 0;
out_error:
	p9_client_clunk(file->private_data);
	file->private_data = NULL;
	return err;
}

Contributors
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CommitProp
Aneesh Kumar K.V
119
35.74%
5
26.32%
M. Mohan Kumar
70
21.02%
2
10.53%
Eric Van Hensbergen
67
20.12%
4
21.05%
Latchesar Ionkov
51
15.32%
4
21.05%
Dominique Martinet
18
5.41%
1
5.26%
Miklos Szeredi
6
1.80%
1
5.26%
Joe Perches
1
0.30%
1
5.26%
Sripathi Kodi
1
0.30%
1
5.26%
Total
333
100.00%
19
100.00%

/**
 * v9fs_file_lock - lock a file (or directory)
 * @filp: file to be locked
 * @cmd: lock command
 * @fl: file lock structure
 *
 * Bugs: this looks like a local only lock, we should extend into 9P
 *       by using open exclusive
 */



static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl)
{
	int res = 0;
	struct inode *inode = file_inode(filp);

	p9_debug(P9_DEBUG_VFS, "filp: %p lock: %p\n", filp, fl);

	/* No mandatory locks */
	if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
		return -ENOLCK;

	if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) {
		filemap_write_and_wait(inode->i_mapping);
		invalidate_mapping_pages(&inode->i_data, 0, -1);
	}

	return res;
}

Contributors
Person
Tokens
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CommitProp
M. Mohan Kumar
104
96.30%
1
33.33%
Al Viro
3
2.78%
1
33.33%
Joe Perches
1
0.93%
1
33.33%
Total
108
100.00%
3
100.00%



static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl)
{
	struct p9_flock flock;
	struct p9_fid *fid;
	uint8_t status = P9_LOCK_ERROR;
	int res = 0;
	unsigned char fl_type;

	fid = filp->private_data;
	BUG_ON(fid == NULL);

	if ((fl->fl_flags & FL_POSIX) != FL_POSIX)
		BUG();

	res = locks_lock_file_wait(filp, fl);
	if (res < 0)
		goto out;

	/* convert posix lock to p9 tlock args */
	memset(&flock, 0, sizeof(flock));
	/* map the lock type */
	switch (fl->fl_type) {
	case F_RDLCK:
		flock.type = P9_LOCK_TYPE_RDLCK;
		break;
	case F_WRLCK:
		flock.type = P9_LOCK_TYPE_WRLCK;
		break;
	case F_UNLCK:
		flock.type = P9_LOCK_TYPE_UNLCK;
		break;
	}
	flock.start = fl->fl_start;
	if (fl->fl_end == OFFSET_MAX)
		flock.length = 0;
	else
		flock.length = fl->fl_end - fl->fl_start + 1;
	flock.proc_id = fl->fl_pid;
	flock.client_id = fid->clnt->name;
	if (IS_SETLKW(cmd))
		flock.flags = P9_LOCK_FLAGS_BLOCK;

	/*
         * if its a blocked request and we get P9_LOCK_BLOCKED as the status
         * for lock request, keep on trying
         */
	for (;;) {
		res = p9_client_lock_dotl(fid, &flock, &status);
		if (res < 0)
			goto out_unlock;

		if (status != P9_LOCK_BLOCKED)
			break;
		if (status == P9_LOCK_BLOCKED && !IS_SETLKW(cmd))
			break;
		if (schedule_timeout_interruptible(P9_LOCK_TIMEOUT) != 0)
			break;
	}

	/* map 9p status to VFS status */
	switch (status) {
	case P9_LOCK_SUCCESS:
		res = 0;
		break;
	case P9_LOCK_BLOCKED:
		res = -EAGAIN;
		break;
	default:
		WARN_ONCE(1, "unknown lock status code: %d\n", status);
		/* fallthough */
	case P9_LOCK_ERROR:
	case P9_LOCK_GRACE:
		res = -ENOLCK;
		break;
	}

out_unlock:
	/*
         * incase server returned error for lock request, revert
         * it locally
         */
	if (res < 0 && fl->fl_type != F_UNLCK) {
		fl_type = fl->fl_type;
		fl->fl_type = F_UNLCK;
		/* Even if this fails we want to return the remote error */
		locks_lock_file_wait(filp, fl);
		fl->fl_type = fl_type;
	}
out:
	return res;
}

Contributors
Person
Tokens
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Commits
CommitProp
M. Mohan Kumar
299
82.14%
1
11.11%
Jim Garlick
40
10.99%
2
22.22%
Kirill A. Shutemov
16
4.40%
2
22.22%
Will Deacon
4
1.10%
1
11.11%
Dominique Martinet
3
0.82%
2
22.22%
Benjamin Coddington
2
0.55%
1
11.11%
Total
364
100.00%
9
100.00%



static int v9fs_file_getlock(struct file *filp, struct file_lock *fl)
{
	struct p9_getlock glock;
	struct p9_fid *fid;
	int res = 0;

	fid = filp->private_data;
	BUG_ON(fid == NULL);

	posix_test_lock(filp, fl);
	/*
         * if we have a conflicting lock locally, no need to validate
         * with server
         */
	if (fl->fl_type != F_UNLCK)
		return res;

	/* convert posix lock to p9 tgetlock args */
	memset(&glock, 0, sizeof(glock));
	glock.type  = P9_LOCK_TYPE_UNLCK;
	glock.start = fl->fl_start;
	if (fl->fl_end == OFFSET_MAX)
		glock.length = 0;
	else
		glock.length = fl->fl_end - fl->fl_start + 1;
	glock.proc_id = fl->fl_pid;
	glock.client_id = fid->clnt->name;

	res = p9_client_getlock_dotl(fid, &glock);
	if (res < 0)
		return res;
	/* map 9p lock type to os lock type */
	switch (glock.type) {
	case P9_LOCK_TYPE_RDLCK:
		fl->fl_type = F_RDLCK;
		break;
	case P9_LOCK_TYPE_WRLCK:
		fl->fl_type = F_WRLCK;
		break;
	case P9_LOCK_TYPE_UNLCK:
		fl->fl_type = F_UNLCK;
		break;
	}
	if (glock.type != P9_LOCK_TYPE_UNLCK) {
		fl->fl_start = glock.start;
		if (glock.length == 0)
			fl->fl_end = OFFSET_MAX;
		else
			fl->fl_end = glock.start + glock.length - 1;
		fl->fl_pid = glock.proc_id;
	}
	kfree(glock.client_id);
	return res;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
M. Mohan Kumar
213
81.92%
1
25.00%
Jim Garlick
36
13.85%
1
25.00%
Al Viro
7
2.69%
1
25.00%
Will Deacon
4
1.54%
1
25.00%
Total
260
100.00%
4
100.00%

/**
 * v9fs_file_lock_dotl - lock a file (or directory)
 * @filp: file to be locked
 * @cmd: lock command
 * @fl: file lock structure
 *
 */



static int v9fs_file_lock_dotl(struct file *filp, int cmd, struct file_lock *fl)
{
	struct inode *inode = file_inode(filp);
	int ret = -ENOLCK;

	p9_debug(P9_DEBUG_VFS, "filp: %p cmd:%d lock: %p name: %pD\n",
		 filp, cmd, fl, filp);

	/* No mandatory locks */
	if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
		goto out_err;

	if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) {
		filemap_write_and_wait(inode->i_mapping);
		invalidate_mapping_pages(&inode->i_data, 0, -1);
	}

	if (IS_SETLK(cmd) || IS_SETLKW(cmd))
		ret = v9fs_file_do_lock(filp, cmd, fl);
	else if (IS_GETLK(cmd))
		ret = v9fs_file_getlock(filp, fl);
	else
		ret = -EINVAL;
out_err:
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
M. Mohan Kumar
124
77.50%
3
25.00%
Eric Van Hensbergen
23
14.38%
4
33.33%
Al Viro
4
2.50%
2
16.67%
Abhishek Kulkarni
4
2.50%
1
8.33%
Venkateswararao Jujjuri (JV)
4
2.50%
1
8.33%
Joe Perches
1
0.62%
1
8.33%
Total
160
100.00%
12
100.00%

/**
 * v9fs_file_flock_dotl - lock a file
 * @filp: file to be locked
 * @cmd: lock command
 * @fl: file lock structure
 *
 */



static int v9fs_file_flock_dotl(struct file *filp, int cmd,
	struct file_lock *fl)
{
	struct inode *inode = file_inode(filp);
	int ret = -ENOLCK;

	p9_debug(P9_DEBUG_VFS, "filp: %p cmd:%d lock: %p name: %pD\n",
		 filp, cmd, fl, filp);

	/* No mandatory locks */
	if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
		goto out_err;

	if (!(fl->fl_flags & FL_FLOCK))
		goto out_err;

	if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) {
		filemap_write_and_wait(inode->i_mapping);
		invalidate_mapping_pages(&inode->i_data, 0, -1);
	}
	/* Convert flock to posix lock */
	fl->fl_flags |= FL_POSIX;
	fl->fl_flags ^= FL_FLOCK;

	if (IS_SETLK(cmd) | IS_SETLKW(cmd))
		ret = v9fs_file_do_lock(filp, cmd, fl);
	else
		ret = -EINVAL;
out_err:
	return ret;
}

Contributors
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CommitProp
Eric Van Hensbergen
75
44.12%
1
10.00%
M. Mohan Kumar
73
42.94%
1
10.00%
Sachin S. Prabhu
6
3.53%
1
10.00%
Andrew Morton
6
3.53%
1
10.00%
Al Viro
4
2.35%
2
20.00%
Pavel Emelyanov
3
1.76%
1
10.00%
Hirofumi Ogawa
1
0.59%
1
10.00%
Latchesar Ionkov
1
0.59%
1
10.00%
Joe Perches
1
0.59%
1
10.00%
Total
170
100.00%
10
100.00%

/**
 * v9fs_file_read - read from a file
 * @filp: file pointer to read
 * @udata: user data buffer to read data into
 * @count: size of buffer
 * @offset: offset at which to read data
 *
 */


static ssize_t

v9fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
	struct p9_fid *fid = iocb->ki_filp->private_data;
	int ret, err = 0;

	p9_debug(P9_DEBUG_VFS, "count %zu offset %lld\n",
		 iov_iter_count(to), iocb->ki_pos);

	ret = p9_client_read(fid, iocb->ki_pos, to, &err);
	if (!ret)
		return err;

	iocb->ki_pos += ret;
	return ret;
}

Contributors
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Commits
CommitProp
Al Viro
41
49.40%
2
25.00%
Eric Van Hensbergen
32
38.55%
3
37.50%
Latchesar Ionkov
8
9.64%
2
25.00%
Vincent Bernat
2
2.41%
1
12.50%
Total
83
100.00%
8
100.00%

/**
 * v9fs_file_write - write to a file
 * @filp: file pointer to write
 * @data: data buffer to write data from
 * @count: size of buffer
 * @offset: offset at which to write data
 *
 */

static ssize_t

v9fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
	struct file *file = iocb->ki_filp;
	ssize_t retval;
	loff_t origin;
	int err = 0;

	retval = generic_write_checks(iocb, from);
	if (retval <= 0)
		return retval;

	origin = iocb->ki_pos;
	retval = p9_client_write(file->private_data, iocb->ki_pos, from, &err);
	if (retval > 0) {
		struct inode *inode = file_inode(file);
		loff_t i_size;
		unsigned long pg_start, pg_end;
		pg_start = origin >> PAGE_SHIFT;
		pg_end = (origin + retval - 1) >> PAGE_SHIFT;
		if (inode->i_mapping && inode->i_mapping->nrpages)
			invalidate_inode_pages2_range(inode->i_mapping,
						      pg_start, pg_end);
		iocb->ki_pos += retval;
		i_size = i_size_read(inode);
		if (iocb->ki_pos > i_size) {
			inode_add_bytes(inode, iocb->ki_pos - i_size);
			i_size_write(inode, iocb->ki_pos);
		}
		return retval;
	}
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Al Viro
103
52.82%
4
23.53%
Abhishek Kulkarni
36
18.46%
3
17.65%
Eric Van Hensbergen
32
16.41%
4
23.53%
Aneesh Kumar K.V
19
9.74%
2
11.76%
Kirill A. Shutemov
2
1.03%
1
5.88%
Latchesar Ionkov
1
0.51%
1
5.88%
Harsh Prateek Bora
1
0.51%
1
5.88%
Venkateswararao Jujjuri (JV)
1
0.51%
1
5.88%
Total
195
100.00%
17
100.00%



static int v9fs_file_fsync(struct file *filp, loff_t start, loff_t end,
			   int datasync)
{
	struct p9_fid *fid;
	struct inode *inode = filp->f_mapping->host;
	struct p9_wstat wstat;
	int retval;

	retval = filemap_write_and_wait_range(inode->i_mapping, start, end);
	if (retval)
		return retval;

	inode_lock(inode);
	p9_debug(P9_DEBUG_VFS, "filp %p datasync %x\n", filp, datasync);

	fid = filp->private_data;
	v9fs_blank_wstat(&wstat);

	retval = p9_client_wstat(fid, &wstat);
	inode_unlock(inode);

	return retval;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
M. Mohan Kumar
60
55.05%
1
20.00%
Josef Bacik
45
41.28%
1
20.00%
Al Viro
2
1.83%
1
20.00%
Christoph Hellwig
1
0.92%
1
20.00%
Joe Perches
1
0.92%
1
20.00%
Total
109
100.00%
5
100.00%



int v9fs_file_fsync_dotl(struct file *filp, loff_t start, loff_t end,
			 int datasync)
{
	struct p9_fid *fid;
	struct inode *inode = filp->f_mapping->host;
	int retval;

	retval = filemap_write_and_wait_range(inode->i_mapping, start, end);
	if (retval)
		return retval;

	inode_lock(inode);
	p9_debug(P9_DEBUG_VFS, "filp %p datasync %x\n", filp, datasync);

	fid = filp->private_data;

	retval = p9_client_fsync(fid, datasync);
	inode_unlock(inode);

	return retval;
}

Contributors
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CommitProp
Venkateswararao Jujjuri (JV)
48
49.48%
2
40.00%
Josef Bacik
45
46.39%
1
20.00%
Al Viro
2
2.06%
1
20.00%
Joe Perches
2
2.06%
1
20.00%
Total
97
100.00%
5
100.00%


static int

v9fs_file_mmap(struct file *filp, struct vm_area_struct *vma)
{
	int retval;


	retval = generic_file_mmap(filp, vma);
	if (!retval)
		vma->vm_ops = &v9fs_file_vm_ops;

	return retval;
}

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Aneesh Kumar K.V
41
95.35%
1
50.00%
Dominique Martinet
2
4.65%
1
50.00%
Total
43
100.00%
2
100.00%


static int

v9fs_mmap_file_mmap(struct file *filp, struct vm_area_struct *vma)
{
	int retval;
	struct inode *inode;
	struct v9fs_inode *v9inode;
	struct p9_fid *fid;

	inode = file_inode(filp);
	v9inode = V9FS_I(inode);
	mutex_lock(&v9inode->v_mutex);
	if (!v9inode->writeback_fid &&
	    (vma->vm_flags & VM_WRITE)) {
		/*
                 * clone a fid and add it to writeback_fid
                 * we do it during mmap instead of
                 * page dirty time via write_begin/page_mkwrite
                 * because we want write after unlink usecase
                 * to work.
                 */
		fid = v9fs_writeback_fid(file_dentry(filp));
		if (IS_ERR(fid)) {
			retval = PTR_ERR(fid);
			mutex_unlock(&v9inode->v_mutex);
			return retval;
		}
		v9inode->writeback_fid = (void *) fid;
	}
	mutex_unlock(&v9inode->v_mutex);

	retval = generic_file_mmap(filp, vma);
	if (!retval)
		vma->vm_ops = &v9fs_mmap_file_vm_ops;

	return retval;
}

Contributors
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Tokens
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CommitProp
Dominique Martinet
148
96.73%
1
33.33%
Miklos Szeredi
3
1.96%
1
33.33%
Aneesh Kumar K.V
2
1.31%
1
33.33%
Total
153
100.00%
3
100.00%


static int

v9fs_vm_page_mkwrite(struct vm_fault *vmf)
{
	struct v9fs_inode *v9inode;
	struct page *page = vmf->page;
	struct file *filp = vmf->vma->vm_file;
	struct inode *inode = file_inode(filp);


	p9_debug(P9_DEBUG_VFS, "page %p fid %lx\n",
		 page, (unsigned long)filp->private_data);

	/* Update file times before taking page lock */
	file_update_time(filp);

	v9inode = V9FS_I(inode);
	/* make sure the cache has finished storing the page */
	v9fs_fscache_wait_on_page_write(inode, page);
	BUG_ON(!v9inode->writeback_fid);
	lock_page(page);
	if (page->mapping != inode->i_mapping)
		goto out_unlock;
	wait_for_stable_page(page);

	return VM_FAULT_LOCKED;
out_unlock:
	unlock_page(page);
	return VM_FAULT_NOPAGE;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Aneesh Kumar K.V
109
85.16%
2
25.00%
Jan Kara
6
4.69%
1
12.50%
Darrick J. Wong
5
3.91%
1
12.50%
Al Viro
3
2.34%
1
12.50%
Dave Jiang
2
1.56%
1
12.50%
Dominique Martinet
2
1.56%
1
12.50%
Joe Perches
1
0.78%
1
12.50%
Total
128
100.00%
8
100.00%

/**
 * v9fs_mmap_file_read - read from a file
 * @filp: file pointer to read
 * @data: user data buffer to read data into
 * @count: size of buffer
 * @offset: offset at which to read data
 *
 */

static ssize_t

v9fs_mmap_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
	/* TODO: Check if there are dirty pages */
	return v9fs_file_read_iter(iocb, to);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dominique Martinet
16
64.00%
1
50.00%
Al Viro
9
36.00%
1
50.00%
Total
25
100.00%
2
100.00%

/**
 * v9fs_mmap_file_write - write to a file
 * @filp: file pointer to write
 * @data: data buffer to write data from
 * @count: size of buffer
 * @offset: offset at which to write data
 *
 */

static ssize_t

v9fs_mmap_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
	/*
         * TODO: invalidate mmaps on filp's inode between
         * offset and offset+count
         */
	return v9fs_file_write_iter(iocb, from);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dominique Martinet
16
64.00%
1
50.00%
Al Viro
9
36.00%
1
50.00%
Total
25
100.00%
2
100.00%



static void v9fs_mmap_vm_close(struct vm_area_struct *vma)
{
	struct inode *inode;

	struct writeback_control wbc = {
		.nr_to_write = LONG_MAX,
		.sync_mode = WB_SYNC_ALL,
		.range_start = vma->vm_pgoff * PAGE_SIZE,
		 /* absolute end, byte at end included */
		.range_end = vma->vm_pgoff * PAGE_SIZE +
			(vma->vm_end - vma->vm_start - 1),
        };


	p9_debug(P9_DEBUG_VFS, "9p VMA close, %p, flushing", vma);

	inode = file_inode(vma->vm_file);

	if (!mapping_cap_writeback_dirty(inode->i_mapping))
		wbc.nr_to_write = 0;

	might_sleep();
	sync_inode(inode, &wbc);
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Dominique Martinet
108
100.00%
1
100.00%
Total
108
100.00%
1
100.00%


static const struct vm_operations_struct v9fs_file_vm_ops = {
	.fault = filemap_fault,
	.map_pages = filemap_map_pages,
	.page_mkwrite = v9fs_vm_page_mkwrite,
};


static const struct vm_operations_struct v9fs_mmap_file_vm_ops = {
	.close = v9fs_mmap_vm_close,
	.fault = filemap_fault,
	.map_pages = filemap_map_pages,
	.page_mkwrite = v9fs_vm_page_mkwrite,
};



const struct file_operations v9fs_cached_file_operations = {
	.llseek = generic_file_llseek,
	.read_iter = generic_file_read_iter,
	.write_iter = generic_file_write_iter,
	.open = v9fs_file_open,
	.release = v9fs_dir_release,
	.lock = v9fs_file_lock,
	.mmap = v9fs_file_mmap,
	.fsync = v9fs_file_fsync,
};


const struct file_operations v9fs_cached_file_operations_dotl = {
	.llseek = generic_file_llseek,
	.read_iter = generic_file_read_iter,
	.write_iter = generic_file_write_iter,
	.open = v9fs_file_open,
	.release = v9fs_dir_release,
	.lock = v9fs_file_lock_dotl,
	.flock = v9fs_file_flock_dotl,
	.mmap = v9fs_file_mmap,
	.fsync = v9fs_file_fsync_dotl,
};


const struct file_operations v9fs_file_operations = {
	.llseek = generic_file_llseek,
	.read_iter = v9fs_file_read_iter,
	.write_iter = v9fs_file_write_iter,
	.open = v9fs_file_open,
	.release = v9fs_dir_release,
	.lock = v9fs_file_lock,
	.mmap = generic_file_readonly_mmap,
	.fsync = v9fs_file_fsync,
};


const struct file_operations v9fs_file_operations_dotl = {
	.llseek = generic_file_llseek,
	.read_iter = v9fs_file_read_iter,
	.write_iter = v9fs_file_write_iter,
	.open = v9fs_file_open,
	.release = v9fs_dir_release,
	.lock = v9fs_file_lock_dotl,
	.flock = v9fs_file_flock_dotl,
	.mmap = generic_file_readonly_mmap,
	.fsync = v9fs_file_fsync_dotl,
};


const struct file_operations v9fs_mmap_file_operations = {
	.llseek = generic_file_llseek,
	.read_iter = v9fs_mmap_file_read_iter,
	.write_iter = v9fs_mmap_file_write_iter,
	.open = v9fs_file_open,
	.release = v9fs_dir_release,
	.lock = v9fs_file_lock,
	.mmap = v9fs_mmap_file_mmap,
	.fsync = v9fs_file_fsync,
};


const struct file_operations v9fs_mmap_file_operations_dotl = {
	.llseek = generic_file_llseek,
	.read_iter = v9fs_mmap_file_read_iter,
	.write_iter = v9fs_mmap_file_write_iter,
	.open = v9fs_file_open,
	.release = v9fs_dir_release,
	.lock = v9fs_file_lock_dotl,
	.flock = v9fs_file_flock_dotl,
	.mmap = v9fs_mmap_file_mmap,
	.fsync = v9fs_file_fsync_dotl,
};
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
M. Mohan Kumar
971
34.77%
4
5.19%
Dominique Martinet
426
15.25%
3
3.90%
Eric Van Hensbergen
343
12.28%
12
15.58%
Aneesh Kumar K.V
316
11.31%
8
10.39%
Al Viro
237
8.49%
12
15.58%
Venkateswararao Jujjuri (JV)
95
3.40%
4
5.19%
Josef Bacik
90
3.22%
1
1.30%
Jim Garlick
76
2.72%
2
2.60%
Latchesar Ionkov
64
2.29%
5
6.49%
Abhishek Kulkarni
46
1.65%
3
3.90%
Sripathi Kodi
38
1.36%
2
2.60%
Kirill A. Shutemov
28
1.00%
4
5.19%
Miklos Szeredi
9
0.32%
1
1.30%
Joe Perches
8
0.29%
1
1.30%
Will Deacon
8
0.29%
1
1.30%
Sachin S. Prabhu
6
0.21%
1
1.30%
Andrew Morton
6
0.21%
1
1.30%
Jan Kara
6
0.21%
1
1.30%
Darrick J. Wong
5
0.18%
1
1.30%
Pavel Emelyanov
3
0.11%
1
1.30%
Benjamin Coddington
2
0.07%
1
1.30%
Dave Jiang
2
0.07%
1
1.30%
Vincent Bernat
2
0.07%
1
1.30%
Hirofumi Ogawa
1
0.04%
1
1.30%
Harsh Prateek Bora
1
0.04%
1
1.30%
Christoph Hellwig
1
0.04%
1
1.30%
Fabian Frederick
1
0.04%
1
1.30%
Linus Torvalds
1
0.04%
1
1.30%
Arjan van de Ven
1
0.04%
1
1.30%
Total
2793
100.00%
77
100.00%
Directory: fs/9p

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