Release 4.10 fs/xfs/xfs_ioctl.c

/*
 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * 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.
 *
 * This program is distributed in the hope that it would 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 the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_ioctl.h"
#include "xfs_alloc.h"
#include "xfs_rtalloc.h"
#include "xfs_itable.h"
#include "xfs_error.h"
#include "xfs_attr.h"
#include "xfs_bmap.h"
#include "xfs_bmap_util.h"
#include "xfs_fsops.h"
#include "xfs_discard.h"
#include "xfs_quota.h"
#include "xfs_export.h"
#include "xfs_trace.h"
#include "xfs_icache.h"
#include "xfs_symlink.h"
#include "xfs_trans.h"
#include "xfs_pnfs.h"
#include "xfs_acl.h"

#include <linux/capability.h>
#include <linux/dcache.h>
#include <linux/mount.h>
#include <linux/namei.h>
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/exportfs.h>

/*
 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
 * a file or fs handle.
 *
 * XFS_IOC_PATH_TO_FSHANDLE
 *    returns fs handle for a mount point or path within that mount point
 * XFS_IOC_FD_TO_HANDLE
 *    returns full handle for a FD opened in user space
 * XFS_IOC_PATH_TO_HANDLE
 *    returns full handle for a path
 */

int

xfs_find_handle(
	unsigned int		cmd,
	xfs_fsop_handlereq_t	*hreq)
{
	int			hsize;
	xfs_handle_t		handle;
	struct inode		*inode;
	struct fd		f = {NULL};
	struct path		path;
	int			error;
	struct xfs_inode	*ip;

	if (cmd == XFS_IOC_FD_TO_HANDLE) {
		f = fdget(hreq->fd);
		if (!f.file)
			return -EBADF;
		inode = file_inode(f.file);
	} else {
		error = user_lpath((const char __user *)hreq->path, &path);
		if (error)
			return error;
		inode = d_inode(path.dentry);
	}
	ip = XFS_I(inode);

	/*
         * We can only generate handles for inodes residing on a XFS filesystem,
         * and only for regular files, directories or symbolic links.
         */
	error = -EINVAL;
	if (inode->i_sb->s_magic != XFS_SB_MAGIC)
		goto out_put;

	error = -EBADF;
	if (!S_ISREG(inode->i_mode) &&
	    !S_ISDIR(inode->i_mode) &&
	    !S_ISLNK(inode->i_mode))
		goto out_put;


	memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));

	if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
		/*
                 * This handle only contains an fsid, zero the rest.
                 */
		memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
		hsize = sizeof(xfs_fsid_t);
	} else {
		handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
					sizeof(handle.ha_fid.fid_len);
		handle.ha_fid.fid_pad = 0;
		handle.ha_fid.fid_gen = inode->i_generation;
		handle.ha_fid.fid_ino = ip->i_ino;

		hsize = XFS_HSIZE(handle);
	}

	error = -EFAULT;
	if (copy_to_user(hreq->ohandle, &handle, hsize) ||
	    copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
		goto out_put;

	error = 0;

 out_put:
	if (cmd == XFS_IOC_FD_TO_HANDLE)
		fdput(f);
	else
		path_put(&path);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
319
90.62%
7
41.18%
al viro
al viro
16
4.55%
3
17.65%
dave chinner
dave chinner
5
1.42%
2
11.76%
eric sandeen
eric sandeen
5
1.42%
1
5.88%
david howells
david howells
3
0.85%
1
5.88%
josef 'jeff' sipek
josef 'jeff' sipek
2
0.57%
1
5.88%
nathan scott
nathan scott
1
0.28%
1
5.88%
david chinner
david chinner
1
0.28%
1
5.88%
Total
352
100.00%
17
100.00%

/*
 * No need to do permission checks on the various pathname components
 * as the handle operations are privileged.
 */

STATIC int

xfs_handle_acceptable(
	void			*context,
	struct dentry		*dentry)
{
	return 1;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
18
100.00%
2
100.00%
Total
18
100.00%
2
100.00%

/*
 * Convert userspace handle data into a dentry.
 */

struct dentry *

xfs_handle_to_dentry(
	struct file		*parfilp,
	void __user		*uhandle,
	u32			hlen)
{
	xfs_handle_t		handle;
	struct xfs_fid64	fid;

	/*
         * Only allow handle opens under a directory.
         */
	if (!S_ISDIR(file_inode(parfilp)->i_mode))
		return ERR_PTR(-ENOTDIR);

	if (hlen != sizeof(xfs_handle_t))
		return ERR_PTR(-EINVAL);
	if (copy_from_user(&handle, uhandle, hlen))
		return ERR_PTR(-EFAULT);
	if (handle.ha_fid.fid_len !=
	    sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
		return ERR_PTR(-EINVAL);

	memset(&fid, 0, sizeof(struct fid));
	fid.ino = handle.ha_fid.fid_ino;
	fid.gen = handle.ha_fid.fid_gen;

	return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
			FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
			xfs_handle_acceptable, NULL);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
172
97.73%
4
66.67%
al viro
al viro
3
1.70%
1
16.67%
nathan scott
nathan scott
1
0.57%
1
16.67%
Total
176
100.00%
6
100.00%


STATIC struct dentry *

xfs_handlereq_to_dentry(
	struct file		*parfilp,
	xfs_fsop_handlereq_t	*hreq)
{
	return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
31
100.00%
3
100.00%
Total
31
100.00%
3
100.00%


int

xfs_open_by_handle(
	struct file		*parfilp,
	xfs_fsop_handlereq_t	*hreq)
{
	const struct cred	*cred = current_cred();
	int			error;
	int			fd;
	int			permflag;
	struct file		*filp;
	struct inode		*inode;
	struct dentry		*dentry;
	fmode_t			fmode;
	struct path		path;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	dentry = xfs_handlereq_to_dentry(parfilp, hreq);
	if (IS_ERR(dentry))
		return PTR_ERR(dentry);
	inode = d_inode(dentry);

	/* Restrict xfs_open_by_handle to directories & regular files. */
	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
		error = -EPERM;
		goto out_dput;
	}

#if BITS_PER_LONG != 32
	hreq->oflags |= O_LARGEFILE;
#endif

	permflag = hreq->oflags;
	fmode = OPEN_FMODE(permflag);
	if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
	    (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
		error = -EPERM;
		goto out_dput;
	}

	if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
		error = -EPERM;
		goto out_dput;
	}

	/* Can't write directories. */
	if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
		error = -EISDIR;
		goto out_dput;
	}

	fd = get_unused_fd_flags(0);
	if (fd < 0) {
		error = fd;
		goto out_dput;
	}

	path.mnt = parfilp->f_path.mnt;
	path.dentry = dentry;
	filp = dentry_open(&path, hreq->oflags, cred);
	dput(dentry);
	if (IS_ERR(filp)) {
		put_unused_fd(fd);
		return PTR_ERR(filp);
	}

	if (S_ISREG(inode->i_mode)) {
		filp->f_flags |= O_NOATIME;
		filp->f_mode |= FMODE_NOCMTIME;
	}

	fd_install(fd, filp);
	return fd;

 out_dput:
	dput(dentry);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
234
65.36%
4
25.00%
nathan scott
nathan scott
46
12.85%
1
6.25%
al viro
al viro
28
7.82%
2
12.50%
david howells
david howells
14
3.91%
2
12.50%
dave chinner
dave chinner
11
3.07%
1
6.25%
vlad apostolov
vlad apostolov
8
2.23%
1
6.25%
stephen lord
stephen lord
6
1.68%
1
6.25%
yann droneaud
yann droneaud
4
1.12%
1
6.25%
josef 'jeff' sipek
josef 'jeff' sipek
3
0.84%
1
6.25%
eric sandeen
eric sandeen
3
0.84%
1
6.25%
eryu guan
eryu guan
1
0.28%
1
6.25%
Total
358
100.00%
16
100.00%


int

xfs_readlink_by_handle(
	struct file		*parfilp,
	xfs_fsop_handlereq_t	*hreq)
{
	struct dentry		*dentry;
	__u32			olen;
	int			error;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	dentry = xfs_handlereq_to_dentry(parfilp, hreq);
	if (IS_ERR(dentry))
		return PTR_ERR(dentry);

	/* Restrict this handle operation to symlinks only. */
	if (!d_is_symlink(dentry)) {
		error = -EINVAL;
		goto out_dput;
	}

	if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
		error = -EFAULT;
		goto out_dput;
	}

	error = vfs_readlink(dentry, hreq->ohandle, olen);

 out_dput:
	dput(dentry);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
116
90.62%
6
60.00%
nathan scott
nathan scott
6
4.69%
2
20.00%
eric sandeen
eric sandeen
4
3.12%
1
10.00%
miklos szeredi
miklos szeredi
2
1.56%
1
10.00%
Total
128
100.00%
10
100.00%


int

xfs_set_dmattrs(
	xfs_inode_t     *ip,
	u_int		evmask,
	u_int16_t	state)
{
	xfs_mount_t	*mp = ip->i_mount;
	xfs_trans_t	*tp;
	int		error;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	if (XFS_FORCED_SHUTDOWN(mp))
		return -EIO;

	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
	if (error)
		return error;

	xfs_ilock(ip, XFS_ILOCK_EXCL);
	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);

	ip->i_d.di_dmevmask = evmask;
	ip->i_d.di_dmstate  = state;

	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
	error = xfs_trans_commit(tp);

	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
dave chinner
dave chinner
125
92.59%
2
50.00%
christoph hellwig
christoph hellwig
6
4.44%
1
25.00%
jeff liu
jeff liu
4
2.96%
1
25.00%
Total
135
100.00%
4
100.00%


STATIC int

xfs_fssetdm_by_handle(
	struct file		*parfilp,
	void			__user *arg)
{
	int			error;
	struct fsdmidata	fsd;
	xfs_fsop_setdm_handlereq_t dmhreq;
	struct dentry		*dentry;

	if (!capable(CAP_MKNOD))
		return -EPERM;
	if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
		return -EFAULT;

	error = mnt_want_write_file(parfilp);
	if (error)
		return error;

	dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
	if (IS_ERR(dentry)) {
		mnt_drop_write_file(parfilp);
		return PTR_ERR(dentry);
	}

	if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
		error = -EPERM;
		goto out;
	}

	if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
		error = -EFAULT;
		goto out;
	}

	error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
				 fsd.fsd_dmstate);

 out:
	mnt_drop_write_file(parfilp);
	dput(dentry);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
147
73.87%
5
55.56%
jan kara
jan kara
26
13.07%
1
11.11%
nathan scott
nathan scott
17
8.54%
2
22.22%
david howells
david howells
9
4.52%
1
11.11%
Total
199
100.00%
9
100.00%


STATIC int

xfs_attrlist_by_handle(
	struct file		*parfilp,
	void			__user *arg)
{
	int			error = -ENOMEM;
	attrlist_cursor_kern_t	*cursor;
	struct xfs_fsop_attrlist_handlereq __user	*p = arg;
	xfs_fsop_attrlist_handlereq_t al_hreq;
	struct dentry		*dentry;
	char			*kbuf;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
		return -EFAULT;
	if (al_hreq.buflen < sizeof(struct attrlist) ||
	    al_hreq.buflen > XFS_XATTR_LIST_MAX)
		return -EINVAL;

	/*
         * Reject flags, only allow namespaces.
         */
	if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
		return -EINVAL;

	dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
	if (IS_ERR(dentry))
		return PTR_ERR(dentry);

	kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
	if (!kbuf)
		goto out_dput;

	cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
	error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
					al_hreq.flags, cursor);
	if (error)
		goto out_kfree;

	if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
		error = -EFAULT;
		goto out_kfree;
	}

	if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
		error = -EFAULT;

out_kfree:
	kmem_free(kbuf);
out_dput:
	dput(dentry);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
211
78.73%
5
38.46%
darrick j. wong
darrick j. wong
35
13.06%
1
7.69%
dan carpenter
dan carpenter
10
3.73%
1
7.69%
nathan scott
nathan scott
5
1.87%
2
15.38%
david howells
david howells
3
1.12%
1
7.69%
eric sandeen
eric sandeen
2
0.75%
1
7.69%
jan tulak
jan tulak
1
0.37%
1
7.69%
dave chinner
dave chinner
1
0.37%
1
7.69%
Total
268
100.00%
13
100.00%


int

xfs_attrmulti_attr_get(
	struct inode		*inode,
	unsigned char		*name,
	unsigned char		__user *ubuf,
	__uint32_t		*len,
	__uint32_t		flags)
{
	unsigned char		*kbuf;
	int			error = -EFAULT;

	if (*len > XFS_XATTR_SIZE_MAX)
		return -EINVAL;
	kbuf = kmem_zalloc_large(*len, KM_SLEEP);
	if (!kbuf)
		return -ENOMEM;

	error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
	if (error)
		goto out_kfree;

	if (copy_to_user(ubuf, kbuf, *len))
		error = -EFAULT;

out_kfree:
	kmem_free(kbuf);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
108
86.40%
3
30.00%
dave chinner
dave chinner
7
5.60%
3
30.00%
david chinner
david chinner
7
5.60%
2
20.00%
nathan scott
nathan scott
2
1.60%
1
10.00%
jan tulak
jan tulak
1
0.80%
1
10.00%
Total
125
100.00%
10
100.00%


int

xfs_attrmulti_attr_set(
	struct inode		*inode,
	unsigned char		*name,
	const unsigned char	__user *ubuf,
	__uint32_t		len,
	__uint32_t		flags)
{
	unsigned char		*kbuf;
	int			error;

	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
		return -EPERM;
	if (len > XFS_XATTR_SIZE_MAX)
		return -EINVAL;

	kbuf = memdup_user(ubuf, len);
	if (IS_ERR(kbuf))
		return PTR_ERR(kbuf);

	error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
	if (!error)
		xfs_forget_acl(inode, name, flags);
	kfree(kbuf);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
83
66.94%
3
33.33%
andreas gruenbacher
andreas gruenbacher
27
21.77%
2
22.22%
li zefan
li zefan
8
6.45%
1
11.11%
david chinner
david chinner
3
2.42%
1
11.11%
dave chinner
dave chinner
2
1.61%
1
11.11%
jan tulak
jan tulak
1
0.81%
1
11.11%
Total
124
100.00%
9
100.00%


int

xfs_attrmulti_attr_remove(
	struct inode		*inode,
	unsigned char		*name,
	__uint32_t		flags)
{
	int			error;

	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
		return -EPERM;
	error = xfs_attr_remove(XFS_I(inode), name, flags);
	if (!error)
		xfs_forget_acl(inode, name, flags);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
44
64.71%
3
50.00%
andreas gruenbacher
andreas gruenbacher
22
32.35%
1
16.67%
david chinner
david chinner
1
1.47%
1
16.67%
dave chinner
dave chinner
1
1.47%
1
16.67%
Total
68
100.00%
6
100.00%


STATIC int

xfs_attrmulti_by_handle(
	struct file		*parfilp,
	void			__user *arg)
{
	int			error;
	xfs_attr_multiop_t	*ops;
	xfs_fsop_attrmulti_handlereq_t am_hreq;
	struct dentry		*dentry;
	unsigned int		i, size;
	unsigned char		*attr_name;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
		return -EFAULT;

	/* overflow check */
	if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
		return -E2BIG;

	dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
	if (IS_ERR(dentry))
		return PTR_ERR(dentry);

	error = -E2BIG;
	size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
	if (!size || size > 16 * PAGE_SIZE)
		goto out_dput;

	ops = memdup_user(am_hreq.ops, size);
	if (IS_ERR(ops)) {
		error = PTR_ERR(ops);
		goto out_dput;
	}

	error = -ENOMEM;
	attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
	if (!attr_name)
		goto out_kfree_ops;

	error = 0;
	for (i = 0; i < am_hreq.opcount; i++) {
		ops[i].am_error = strncpy_from_user((char *)attr_name,
				ops[i].am_attrname, MAXNAMELEN);
		if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
			error = -ERANGE;
		if (ops[i].am_error < 0)
			break;

		switch (ops[i].am_opcode) {
		case ATTR_OP_GET:
			ops[i].am_error = xfs_attrmulti_attr_get(
					d_inode(dentry), attr_name,
					ops[i].am_attrvalue, &ops[i].am_length,
					ops[i].am_flags);
			break;
		case ATTR_OP_SET:
			ops[i].am_error = mnt_want_write_file(parfilp);
			if (ops[i].am_error)
				break;
			ops[i].am_error = xfs_attrmulti_attr_set(
					d_inode(dentry), attr_name,
					ops[i].am_attrvalue, ops[i].am_length,
					ops[i].am_flags);
			mnt_drop_write_file(parfilp);
			break;
		case ATTR_OP_REMOVE:
			ops[i].am_error = mnt_want_write_file(parfilp);
			if (ops[i].am_error)
				break;
			ops[i].am_error = xfs_attrmulti_attr_remove(
					d_inode(dentry), attr_name,
					ops[i].am_flags);
			mnt_drop_write_file(parfilp);
			break;
		default:
			ops[i].am_error = -EINVAL;
		}
	}

	if (copy_to_user(am_hreq.ops, ops, size))
		error = -EFAULT;

	kfree(attr_name);
 out_kfree_ops:
	kfree(ops);
 out_dput:
	dput(dentry);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
370
72.55%
4
26.67%
dave hansen
dave hansen
54
10.59%
1
6.67%
nathan scott
nathan scott
28
5.49%
2
13.33%
zhitong wang
zhitong wang
18
3.53%
1
6.67%
li zefan
li zefan
13
2.55%
1
6.67%
david howells
david howells
9
1.76%
1
6.67%
dave chinner
dave chinner
5
0.98%
1
6.67%
david chinner
david chinner
5
0.98%
1
6.67%
al viro
al viro
4
0.78%
2
13.33%
tuomas tynkkynen
tuomas tynkkynen
4
0.78%
1
6.67%
Total
510
100.00%
15
100.00%


int

xfs_ioc_space(
	struct file		*filp,
	unsigned int		cmd,
	xfs_flock64_t		*bf)
{
	struct inode		*inode = file_inode(filp);
	struct xfs_inode	*ip = XFS_I(inode);
	struct iattr		iattr;
	enum xfs_prealloc_flags	flags = 0;
	uint			iolock = XFS_IOLOCK_EXCL;
	int			error;

	/*
         * Only allow the sys admin to reserve space unless
         * unwritten extents are enabled.
         */
	if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
	    !capable(CAP_SYS_ADMIN))
		return -EPERM;

	if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
		return -EPERM;

	if (!(filp->f_mode & FMODE_WRITE))
		return -EBADF;

	if (!S_ISREG(inode->i_mode))
		return -EINVAL;

	if (filp->f_flags & O_DSYNC)
		flags |= XFS_PREALLOC_SYNC;
	if (filp->f_mode & FMODE_NOCMTIME)
		flags |= XFS_PREALLOC_INVISIBLE;

	error = mnt_want_write_file(filp);
	if (error)
		return error;

	xfs_ilock(ip, iolock);
	error = xfs_break_layouts(inode, &iolock);
	if (error)
		goto out_unlock;

	xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
	iolock |= XFS_MMAPLOCK_EXCL;

	switch (bf->l_whence) {
	case 0: /*SEEK_SET*/
		break;
	case 1: /*SEEK_CUR*/
		bf->l_start += filp->f_pos;
		break;
	case 2: /*SEEK_END*/
		bf->l_start += XFS_ISIZE(ip);
		break;
	default:
		error = -EINVAL;
		goto out_unlock;
	}

	/*
         * length of <= 0 for resv/unresv/zero is invalid.  length for
         * alloc/free is ignored completely and we have no idea what userspace
         * might have set it to, so set it to zero to allow range
         * checks to pass.
         */
	switch (cmd) {
	case XFS_IOC_ZERO_RANGE:
	case XFS_IOC_RESVSP:
	case XFS_IOC_RESVSP64:
	case XFS_IOC_UNRESVSP:
	case XFS_IOC_UNRESVSP64:
		if (bf->l_len <= 0) {
			error = -EINVAL;
			goto out_unlock;
		}
		break;
	default:
		bf->l_len = 0;
		break;
	}

	if (bf->l_start < 0 ||
	    bf->l_start > inode->i_sb->s_maxbytes ||
	    bf->l_start + bf->l_len < 0 ||
	    bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
		error = -EINVAL;
		goto out_unlock;
	}

	switch (cmd) {
	case XFS_IOC_ZERO_RANGE:
		flags |= XFS_PREALLOC_SET;
		error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
		break;
	case XFS_IOC_RESVSP:
	case XFS_IOC_RESVSP64:
		flags |= XFS_PREALLOC_SET;
		error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
						XFS_BMAPI_PREALLOC);
		break;
	case XFS_IOC_UNRESVSP:
	case XFS_IOC_UNRESVSP64:
		error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
		break;
	case XFS_IOC_ALLOCSP:
	case XFS_IOC_ALLOCSP64:
	case XFS_IOC_FREESP:
	case XFS_IOC_FREESP64:
		flags |= XFS_PREALLOC_CLEAR;
		if (bf->l_start > XFS_ISIZE(ip)) {
			error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
					bf->l_start - XFS_ISIZE(ip), 0);
			if (error)
				goto out_unlock;
		}

		iattr.ia_valid = ATTR_SIZE;
		iattr.ia_size = bf->l_start;

		error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
		break;
	default:
		ASSERT(0);
		error = -EINVAL;
	}

	if (error)
		goto out_unlock;

	error = xfs_update_prealloc_flags(ip, flags);

out_unlock:
	xfs_iunlock(ip, iolock);
	mnt_drop_write_file(filp);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
475
85.13%
9
47.37%
eric sandeen
eric sandeen
27
4.84%
2
10.53%
dave chinner
dave chinner
19
3.41%
3
15.79%
jan kara
jan kara
16
2.87%
2
10.53%
nathan scott
nathan scott
16
2.87%
2
10.53%
alexey dobriyan
alexey dobriyan
5
0.90%
1
5.26%
Total
558
100.00%
19
100.00%


STATIC int

xfs_ioc_bulkstat(
	xfs_mount_t		*mp,
	unsigned int		cmd,
	void			__user *arg)
{
	xfs_fsop_bulkreq_t	bulkreq;
	int			count;	/* # of records returned */
	xfs_ino_t		inlast;	/* last inode number */
	int			done;
	int			error;

	/* done = 1 if there are more stats to get and if bulkstat */
	/* should be called again (unused here, but used in dmapi) */

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	if (XFS_FORCED_SHUTDOWN(mp))
		return -EIO;

	if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
		return -EFAULT;

	if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
		return -EFAULT;

	if ((count = bulkreq.icount) <= 0)
		return -EINVAL;

	if (bulkreq.ubuffer == NULL)
		return -EINVAL;

	if (cmd == XFS_IOC_FSINUMBERS)
		error = xfs_inumbers(mp, &inlast, &count,
					bulkreq.ubuffer, xfs_inumbers_fmt);
	else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
		error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
					sizeof(xfs_bstat_t), NULL, &done);
	else	/* XFS_IOC_FSBULKSTAT */
		error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
				     sizeof(xfs_bstat_t), bulkreq.ubuffer,
				     &done);

	if (error)
		return error;

	if (bulkreq.ocount != NULL) {
		if (copy_to_user(bulkreq.lastip, &inlast,
						sizeof(xfs_ino_t)))
			return -EFAULT;

		if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
			return -EFAULT;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
257
93.45%
2
33.33%
lachlan mcilroy
lachlan mcilroy
12
4.36%
1
16.67%
nathan scott
nathan scott
4
1.45%
2
33.33%
michal marek
michal marek
2
0.73%
1
16.67%
Total
275
100.00%
6
100.00%


STATIC int

xfs_ioc_fsgeometry_v1(
	xfs_mount_t		*mp,
	void			__user *arg)
{
	xfs_fsop_geom_t         fsgeo;
	int			error;

	error = xfs_fs_geometry(mp, &fsgeo, 3);
	if (error)
		return error;

	/*
         * Caller should have passed an argument of type
         * xfs_fsop_geom_v1_t.  This is a proper subset of the
         * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
         */
	if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
		return -EFAULT;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
56
88.89%
1
25.00%
nathan scott
nathan scott
4
6.35%
2
50.00%
alex elder
alex elder
3
4.76%
1
25.00%
Total
63
100.00%
4
100.00%


STATIC int

xfs_ioc_fsgeometry(
	xfs_mount_t		*mp,
	void			__user *arg)
{
	xfs_fsop_geom_t		fsgeo;
	int			error;

	error = xfs_fs_geometry(mp, &fsgeo, 4);
	if (error)
		return error;

	if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
		return -EFAULT;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
58
93.55%
1
33.33%
nathan scott
nathan scott
4
6.45%
2
66.67%
Total
62
100.00%
3
100.00%

/*
 * Linux extended inode flags interface.
 */


STATIC unsigned int

xfs_merge_ioc_xflags(
	unsigned int	flags,
	unsigned int	start)
{
	unsigned int	xflags = start;

	if (flags & FS_IMMUTABLE_FL)
		xflags |= FS_XFLAG_IMMUTABLE;
	else
		xflags &= ~FS_XFLAG_IMMUTABLE;
	if (flags & FS_APPEND_FL)
		xflags |= FS_XFLAG_APPEND;
	else
		xflags &= ~FS_XFLAG_APPEND;
	if (flags & FS_SYNC_FL)
		xflags |= FS_XFLAG_SYNC;
	else
		xflags &= ~FS_XFLAG_SYNC;
	if (flags & FS_NOATIME_FL)
		xflags |= FS_XFLAG_NOATIME;
	else
		xflags &= ~FS_XFLAG_NOATIME;
	if (flags & FS_NODUMP_FL)
		xflags |= FS_XFLAG_NODUMP;
	else
		xflags &= ~FS_XFLAG_NODUMP;

	return xflags;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
nathan scott
nathan scott
89
85.58%
1
33.33%
dave chinner
dave chinner
10
9.62%
1
33.33%
eric sandeen
eric sandeen
5
4.81%
1
33.33%
Total
104
100.00%
3
100.00%


STATIC unsigned int

xfs_di2lxflags(
	__uint16_t	di_flags)
{
	unsigned int	flags = 0;

	if (di_flags & XFS_DIFLAG_IMMUTABLE)
		flags |= FS_IMMUTABLE_FL;
	if (di_flags & XFS_DIFLAG_APPEND)
		flags |= FS_APPEND_FL;
	if (di_flags & XFS_DIFLAG_SYNC)
		flags |= FS_SYNC_FL;
	if (di_flags & XFS_DIFLAG_NOATIME)
		flags |= FS_NOATIME_FL;
	if (di_flags & XFS_DIFLAG_NODUMP)
		flags |= FS_NODUMP_FL;
	return flags;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
nathan scott
nathan scott
64
92.75%
2
66.67%
eric sandeen
eric sandeen
5
7.25%
1
33.33%
Total
69
100.00%
3
100.00%


STATIC int

xfs_ioc_fsgetxattr(
	xfs_inode_t		*ip,
	int			attr,
	void			__user *arg)
{
	struct fsxattr		fa;

	memset(&fa, 0, sizeof(struct fsxattr));

	xfs_ilock(ip, XFS_ILOCK_SHARED);
	fa.fsx_xflags = xfs_ip2xflags(ip);
	fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
	fa.fsx_cowextsize = ip->i_d.di_cowextsize <<
			ip->i_mount->m_sb.sb_blocklog;
	fa.fsx_projid = xfs_get_projid(ip);

	if (attr) {
		if (ip->i_afp) {
			if (ip->i_afp->if_flags & XFS_IFEXTENTS)
				fa.fsx_nextents = xfs_iext_count(ip->i_afp);
			else
				fa.fsx_nextents = ip->i_d.di_anextents;
		} else
			fa.fsx_nextents = 0;
	} else {
		if (ip->i_df.if_flags & XFS_IFEXTENTS)
			fa.fsx_nextents = xfs_iext_count(&ip->i_df);
		else
			fa.fsx_nextents = ip->i_d.di_nextents;
	}
	xfs_iunlock(ip, XFS_ILOCK_SHARED);

	if (copy_to_user(arg, &fa, sizeof(fa)))
		return -EFAULT;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
174
80.93%
2
28.57%
darrick j. wong
darrick j. wong
18
8.37%
1
14.29%
dan rosenberg
dan rosenberg
14
6.51%
1
14.29%
eric sandeen
eric sandeen
5
2.33%
1
14.29%
arkadiusz miskiewicz
arkadiusz miskiewicz
3
1.40%
1
14.29%
nathan scott
nathan scott
1
0.47%
1
14.29%
Total
215
100.00%
7
100.00%


STATIC void

xfs_set_diflags(
	struct xfs_inode	*ip,
	unsigned int		xflags)
{
	unsigned int		di_flags;
	uint64_t		di_flags2;

	/* can't set PREALLOC this way, just preserve it */
	di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
	if (xflags & FS_XFLAG_IMMUTABLE)
		di_flags |= XFS_DIFLAG_IMMUTABLE;
	if (xflags & FS_XFLAG_APPEND)
		di_flags |= XFS_DIFLAG_APPEND;
	if (xflags & FS_XFLAG_SYNC)
		di_flags |= XFS_DIFLAG_SYNC;
	if (xflags & FS_XFLAG_NOATIME)
		di_flags |= XFS_DIFLAG_NOATIME;
	if (xflags & FS_XFLAG_NODUMP)
		di_flags |= XFS_DIFLAG_NODUMP;
	if (xflags & FS_XFLAG_NODEFRAG)
		di_flags |= XFS_DIFLAG_NODEFRAG;
	if (xflags & FS_XFLAG_FILESTREAM)
		di_flags |= XFS_DIFLAG_FILESTREAM;
	if (S_ISDIR(VFS_I(ip)->i_mode)) {
		if (xflags & FS_XFLAG_RTINHERIT)
			di_flags |= XFS_DIFLAG_RTINHERIT;
		if (xflags & FS_XFLAG_NOSYMLINKS)
			di_flags |= XFS_DIFLAG_NOSYMLINKS;
		if (xflags & FS_XFLAG_EXTSZINHERIT)
			di_flags |= XFS_DIFLAG_EXTSZINHERIT;
		if (xflags & FS_XFLAG_PROJINHERIT)
			di_flags |= XFS_DIFLAG_PROJINHERIT;
	} else if (S_ISREG(VFS_I(ip)->i_mode)) {
		if (xflags & FS_XFLAG_REALTIME)
			di_flags |= XFS_DIFLAG_REALTIME;
		if (xflags & FS_XFLAG_EXTSIZE)
			di_flags |= XFS_DIFLAG_EXTSIZE;
	}
	ip->i_d.di_flags = di_flags;

	/* diflags2 only valid for v3 inodes. */
	if (ip->i_d.di_version < 3)
		return;

	di_flags2 = (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
	if (xflags & FS_XFLAG_DAX)
		di_flags2 |= XFS_DIFLAG2_DAX;
	if (xflags & FS_XFLAG_COWEXTSIZE)
		di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;

	ip->i_d.di_flags2 = di_flags2;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
135
53.15%
3
23.08%
dave chinner
dave chinner
66
25.98%
4
30.77%
nathan scott
nathan scott
24
9.45%
3
23.08%
darrick j. wong
darrick j. wong
19
7.48%
1
7.69%
al viro
al viro
6
2.36%
1
7.69%
lachlan mcilroy
lachlan mcilroy
4
1.57%
1
7.69%
Total
254
100.00%
13
100.00%


STATIC void

xfs_diflags_to_linux(
	struct xfs_inode	*ip)
{
	struct inode		*inode = VFS_I(ip);
	unsigned int		xflags = xfs_ip2xflags(ip);

	if (xflags & FS_XFLAG_IMMUTABLE)
		inode->i_flags |= S_IMMUTABLE;
	else
		inode->i_flags &= ~S_IMMUTABLE;
	if (xflags & FS_XFLAG_APPEND)
		inode->i_flags |= S_APPEND;
	else
		inode->i_flags &= ~S_APPEND;
	if (xflags & FS_XFLAG_SYNC)
		inode->i_flags |= S_SYNC;
	else
		inode->i_flags &= ~S_SYNC;
	if (xflags & FS_XFLAG_NOATIME)
		inode->i_flags |= S_NOATIME;
	else
		inode->i_flags &= ~S_NOATIME;
	if (xflags & FS_XFLAG_DAX)
		inode->i_flags |= S_DAX;
	else
		inode->i_flags &= ~S_DAX;

}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
105
80.77%
1
25.00%
dave chinner
dave chinner
24
18.46%
2
50.00%
david chinner
david chinner
1
0.77%
1
25.00%
Total
130
100.00%
4
100.00%


static int

xfs_ioctl_setattr_xflags(
	struct xfs_trans	*tp,
	struct xfs_inode	*ip,
	struct fsxattr		*fa)
{
	struct xfs_mount	*mp = ip->i_mount;

	/* Can't change realtime flag if any extents are allocated. */
	if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
	    XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
		return -EINVAL;

	/* If realtime flag is set then must have realtime device */
	if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
		if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
		    (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
			return -EINVAL;
	}

	/* Clear reflink if we are actually able to set the rt flag. */
	if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
		ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;

	/* Don't allow us to set DAX mode for a reflinked file for now. */
	if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
		return -EINVAL;

	/*
         * Can't modify an immutable/append-only file unless
         * we have appropriate permission.
         */
	if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
	     (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
	    !capable(CAP_LINUX_IMMUTABLE))
		return -EPERM;

	xfs_set_diflags(ip, fa->fsx_xflags);
	xfs_diflags_to_linux(ip);
	xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
	XFS_STATS_INC(mp, xs_ig_attrchg);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
dave chinner
dave chinner
113
47.68%
3
27.27%
christoph hellwig
christoph hellwig
58
24.47%
1
9.09%
darrick j. wong
darrick j. wong
45
18.99%
3
27.27%
arkadiusz miskiewicz
arkadiusz miskiewicz
18
7.59%
2
18.18%
bill o'donnell
bill o'donnell
2
0.84%
1
9.09%
dwight engen
dwight engen
1
0.42%
1
9.09%
Total
237
100.00%
11
100.00%

/*
 * If we are changing DAX flags, we have to ensure the file is clean and any
 * cached objects in the address space are invalidated and removed. This
 * requires us to lock out other IO and page faults similar to a truncate
 * operation. The locks need to be held until the transaction has been committed
 * so that the cache invalidation is atomic with respect to the DAX flag
 * manipulation.
 */

static int

xfs_ioctl_setattr_dax_invalidate(
	struct xfs_inode	*ip,
	struct fsxattr		*fa,
	int			*join_flags)
{
	struct inode		*inode = VFS_I(ip);
	int			error;

	*join_flags = 0;

	/*
         * It is only valid to set the DAX flag on regular files and
         * directories on filesystems where the block size is equal to the page
         * size. On directories it serves as an inherit hint.
         */
	if (fa->fsx_xflags & FS_XFLAG_DAX) {
		if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
			return -EINVAL;
		if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE)
			return -EINVAL;
	}

	/* If the DAX state is not changing, we have nothing to do here. */
	if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
		return 0;
	if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
		return 0;

	/* lock, flush and invalidate mapping in preparation for flag change */
	xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
	error = filemap_write_and_wait(inode->i_mapping);
	if (error)
		goto out_unlock;
	error = invalidate_inode_pages2(inode->i_mapping);
	if (error)
		goto out_unlock;

	*join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
	return 0;

out_unlock:
	xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
	return error;

}

Contributors
Person
Tokens
Prop
Commits
CommitProp
dave chinner
dave chinner
175
90.67%
4
57.14%
christoph hellwig
christoph hellwig
16
8.29%
1
14.29%
bill o'donnell
bill o'donnell
1
0.52%
1
14.29%
dwight engen
dwight engen
1
0.52%
1
14.29%
Total
193
100.00%
7
100.00%

/*
 * Set up the transaction structure for the setattr operation, checking that we
 * have permission to do so. On success, return a clean transaction and the
 * inode locked exclusively ready for further operation specific checks. On
 * failure, return an error without modifying or locking the inode.
 *
 * The inode might already be IO locked on call. If this is the case, it is
 * indicated in @join_flags and we take full responsibility for ensuring they
 * are unlocked from now on. Hence if we have an error here, we still have to
 * unlock them. Otherwise, once they are joined to the transaction, they will
 * be unlocked on commit/cancel.
 */

static struct xfs_trans *

xfs_ioctl_setattr_get_trans(
	struct xfs_inode	*ip,
	int			join_flags)
{
	struct xfs_mount	*mp = ip->i_mount;
	struct xfs_trans	*tp;
	int			error = -EROFS;

	if (mp->m_flags & XFS_MOUNT_RDONLY)
		goto out_unlock;
	error = -EIO;
	if (XFS_FORCED_SHUTDOWN(mp))
		goto out_unlock;

	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
	if (error)
		return ERR_PTR(error);

	xfs_ilock(ip, XFS_ILOCK_EXCL);
	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
	join_flags = 0;

	/*
         * CAP_FOWNER overrides the following restrictions:
         *
         * The user ID of the calling process must be equal to the file owner
         * ID, except in cases where the CAP_FSETID capability is applicable.
         */
	if (!inode_owner_or_capable(VFS_I(ip))) {
		error = -EPERM;
		goto out_cancel;
	}

	if (mp->m_flags & XFS_MOUNT_WSYNC)
		xfs_trans_set_sync(tp);

	return tp;

out_cancel:
	xfs_trans_cancel(tp);
out_unlock:
	if (join_flags)
		xfs_iunlock(ip, join_flags);
	return ERR_PTR(error);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
dave chinner
dave chinner
135
74.18%
3
37.50%
christoph hellwig
christoph hellwig
42
23.08%
3
37.50%
dwight engen
dwight engen
4
2.20%
1
12.50%
arkadiusz miskiewicz
arkadiusz miskiewicz
1
0.55%
1
12.50%
Total
182
100.00%
8
100.00%

/*
 * extent size hint validation is somewhat cumbersome. Rules are:
 *
 * 1. extent size hint is only valid for directories and regular files
 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
 * 4. can only be changed on regular files if no extents are allocated
 * 5. can be changed on directories at any time
 * 6. extsize hint of 0 turns off hints, clears inode flags.
 * 7. Extent size must be a multiple of the appropriate block size.
 * 8. for non-realtime files, the extent size hint must be limited
 *    to half the AG size to avoid alignment extending the extent beyond the
 *    limits of the AG.
 */

static int

xfs_ioctl_setattr_check_extsize(
	struct xfs_inode	*ip,
	struct fsxattr		*fa)
{
	struct xfs_mount	*mp = ip->i_mount;

	if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
		return -EINVAL;

	if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
	    !S_ISDIR(VFS_I(ip)->i_mode))
		return -EINVAL;

	if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
	    ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
		return -EINVAL;

	if (fa->fsx_extsize != 0) {
		xfs_extlen_t    size;
		xfs_fsblock_t   extsize_fsb;

		extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
		if (extsize_fsb > MAXEXTLEN)
			return -EINVAL;

		if (XFS_IS_REALTIME_INODE(ip) ||
		    (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
			size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
		} else {
			size = mp->m_sb.sb_blocksize;
			if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
				return -EINVAL;
		}

		if (fa->fsx_extsize % size)
			return -EINVAL;
	} else
		fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
dave chinner
dave chinner
128
53.56%
5
62.50%
christoph hellwig
christoph hellwig
65
27.20%
1
12.50%
iustin pop
iustin pop
45
18.83%
1
12.50%
fengguang wu
fengguang wu
1
0.42%
1
12.50%
Total
239
100.00%
8
100.00%

/*
 * CoW extent size hint validation rules are:
 *
 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
 *    The inode does not have to have any shared blocks, but it must be a v3.
 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
 *    for a directory, the hint is propagated to new files.
 * 3. Can be changed on files & directories at any time.
 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
 * 5. Extent size must be a multiple of the appropriate block size.
 * 6. The extent size hint must be limited to half the AG size to avoid
 *    alignment extending the extent beyond the limits of the AG.
 */

static int

xfs_ioctl_setattr_check_cowextsize(
	struct xfs_inode	*ip,
	struct fsxattr		*fa)
{
	struct xfs_mount	*mp = ip->i_mount;

	if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
		return 0;

	if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
	    ip->i_d.di_version != 3)
		return -EINVAL;

	if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
		return -EINVAL;

	if (fa->fsx_cowextsize != 0) {
		xfs_extlen_t    size;
		xfs_fsblock_t   cowextsize_fsb;

		cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
		if (cowextsize_fsb > MAXEXTLEN)
			return -EINVAL;

		size = mp->m_sb.sb_blocksize;
		if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
			return -EINVAL;

		if (fa->fsx_cowextsize % size)
			return -EINVAL;
	} else
		fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
darrick j. wong
darrick j. wong
176
100.00%
1
100.00%
Total
176
100.00%
1
100.00%


static int

xfs_ioctl_setattr_check_projid(
	struct xfs_inode	*ip,
	struct fsxattr		*fa)
{
	/* Disallow 32bit project ids if projid32bit feature is not enabled. */
	if (fa->fsx_projid > (__uint16_t)-1 &&
	    !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
		return -EINVAL;

	/*
         * Project Quota ID state is only allowed to change from within the init
         * namespace. Enforce that restriction only if we are trying to change
         * the quota ID state. Everything else is allowed in user namespaces.
         */
	if (current_user_ns() == &init_user_ns)
		return 0;

	if (xfs_get_projid(ip) != fa->fsx_projid)
		return -EINVAL;
	if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
	    (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
		return -EINVAL;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
37
37.76%
1
12.50%
dave chinner
dave chinner
29
29.59%
3
37.50%
arkadiusz miskiewicz
arkadiusz miskiewicz
20
20.41%
2
25.00%
david chinner
david chinner
11
11.22%
1
12.50%
fengguang wu
fengguang wu
1
1.02%
1
12.50%
Total
98
100.00%
8
100.00%


STATIC int

xfs_ioctl_setattr(
	xfs_inode_t		*ip,
	struct fsxattr		*fa)
{
	struct xfs_mount	*mp = ip->i_mount;
	struct xfs_trans	*tp;
	struct xfs_dquot	*udqp = NULL;
	struct xfs_dquot	*pdqp = NULL;
	struct xfs_dquot	*olddquot = NULL;
	int			code;
	int			join_flags = 0;

	trace_xfs_ioctl_setattr(ip);

	code = xfs_ioctl_setattr_check_projid(ip, fa);
	if (code)
		return code;

	/*
         * If disk quotas is on, we make sure that the dquots do exist on disk,
         * before we start any other transactions. Trying to do this later
         * is messy. We don't care to take a readlock to look at the ids
         * in inode here, because we can't hold it across the trans_reserve.
         * If the IDs do change before we take the ilock, we're covered
         * because the i_*dquot fields will get updated anyway.
         */
	if (XFS_IS_QUOTA_ON(mp)) {
		code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
					 ip->i_d.di_gid, fa->fsx_projid,
					 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
		if (code)
			return code;
	}

	/*
         * Changing DAX config may require inode locking for mapping
         * invalidation. These need to be held all the way to transaction commit
         * or cancel time, so need to be passed through to
         * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
         * appropriately.
         */
	code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
	if (code)
		goto error_free_dquots;

	tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
	if (IS_ERR(tp)) {
		code = PTR_ERR(tp);
		goto error_free_dquots;
	}


	if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
	    xfs_get_projid(ip) != fa->fsx_projid) {
		code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
				capable(CAP_FOWNER) ?  XFS_QMOPT_FORCE_RES : 0);
		if (code)	/* out of quota */
			goto error_trans_cancel;
	}

	code = xfs_ioctl_setattr_check_extsize(ip, fa);
	if (code)
		goto error_trans_cancel;

	code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
	if (code)
		goto error_trans_cancel;

	code = xfs_ioctl_setattr_xflags(tp, ip, fa);
	if (code)
		goto error_trans_cancel;

	/*
         * Change file ownership.  Must be the owner or privileged.  CAP_FSETID
         * overrides the following restrictions:
         *
         * The set-user-ID and set-group-ID bits of a file will be cleared upon
         * successful return from chown()
         */

	if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
	    !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
		VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);

	/* Change the ownerships and register project quota modifications */
	if (xfs_get_projid(ip) != fa->fsx_projid) {
		if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
			olddquot = xfs_qm_vop_chown(tp, ip,
						&ip->i_pdquot, pdqp);
		}
		ASSERT(ip->i_d.di_version > 1);
		xfs_set_projid(ip, fa->fsx_projid);
	}

	/*
         * Only set the extent size hint if we've already determined that the
         * extent size hint should be set on the inode. If no extent size flags
         * are set on the inode then unconditionally clear the extent size hint.
         */
	if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
		ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
	else
		ip->i_d.di_extsize = 0;
	if (ip->i_d.di_version == 3 &&
	    (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
		ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
				mp->m_sb.sb_blocklog;
	else
		ip->i_d.di_cowextsize = 0;

	code = xfs_trans_commit(tp);

	/*
         * Release any dquot(s) the inode had kept before chown.
         */
	xfs_qm_dqrele(olddquot);
	xfs_qm_dqrele(udqp);
	xfs_qm_dqrele(pdqp);

	return code;

error_trans_cancel:
	xfs_trans_cancel(tp);
error_free_dquots:
	xfs_qm_dqrele(udqp);
	xfs_qm_dqrele(pdqp);
	return code;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
264
50.57%
4
19.05%
dave chinner
dave chinner
101
19.35%
9
42.86%
david chinner
david chinner
71
13.60%
1
4.76%
darrick j. wong
darrick j. wong
61
11.69%
1
4.76%
chandra seetharaman
chandra seetharaman
9
1.72%
1
4.76%
arkadiusz miskiewicz
arkadiusz miskiewicz
7
1.34%
1
4.76%
dwight engen
dwight engen
6
1.15%
1
4.76%
nathan scott
nathan scott
1
0.19%
1
4.76%
andy lutomirski
andy lutomirski
1
0.19%
1
4.76%
lachlan mcilroy
lachlan mcilroy
1
0.19%
1
4.76%
Total
522
100.00%
21
100.00%


STATIC int

xfs_ioc_fssetxattr(
	xfs_inode_t		*ip,
	struct file		*filp,
	void			__user *arg)
{
	struct fsxattr		fa;
	int error;

	if (copy_from_user(&fa, arg, sizeof(fa)))
		return -EFAULT;

	error = mnt_want_write_file(filp);
	if (error)
		return error;
	error = xfs_ioctl_setattr(ip, &fa);
	mnt_drop_write_file(filp);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
32
41.03%
1
25.00%
jan kara
jan kara
26
33.33%
1
25.00%
lachlan mcilroy
lachlan mcilroy
19
24.36%
1
25.00%
nathan scott
nathan scott
1
1.28%
1
25.00%
Total
78
100.00%
4
100.00%


STATIC int

xfs_ioc_getxflags(
	xfs_inode_t		*ip,
	void			__user *arg)
{
	unsigned int		flags;

	flags = xfs_di2lxflags(ip->i_d.di_flags);
	if (copy_to_user(arg, &flags, sizeof(flags)))
		return -EFAULT;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
50
96.15%
1
50.00%
lachlan mcilroy
lachlan mcilroy
2
3.85%
1
50.00%
Total
52
100.00%
2
100.00%


STATIC int

xfs_ioc_setxflags(
	struct xfs_inode	*ip,
	struct file		*filp,
	void			__user *arg)
{
	struct xfs_trans	*tp;
	struct fsxattr		fa;
	unsigned int		flags;
	int			join_flags = 0;
	int			error;

	if (copy_from_user(&flags, arg, sizeof(flags)))
		return -EFAULT;

	if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
		      FS_NOATIME_FL | FS_NODUMP_FL | \
		      FS_SYNC_FL))
		return -EOPNOTSUPP;

	fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));

	error = mnt_want_write_file(filp);
	if (error)
		return error;

	/*
         * Changing DAX config may require inode locking for mapping
         * invalidation. These need to be held all the way to transaction commit
         * or cancel time, so need to be passed through to
         * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
         * appropriately.
         */
	error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
	if (error)
		goto out_drop_write;

	tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
	if (IS_ERR(tp)) {
		error = PTR_ERR(tp);
		goto out_drop_write;
	}

	error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
	if (error) {
		xfs_trans_cancel(tp);
		goto out_drop_write;
	}

	error = xfs_trans_commit(tp);
out_drop_write:
	mnt_drop_write_file(filp);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
dave chinner
dave chinner
85
41.67%
2
16.67%
nathan scott
nathan scott
48
23.53%
3
25.00%
christoph hellwig
christoph hellwig
32
15.69%
4
33.33%
jan kara
jan kara
27
13.24%
1
8.33%
lachlan mcilroy
lachlan mcilroy
7
3.43%
1
8.33%
eric sandeen
eric sandeen
5
2.45%
1
8.33%
Total
204
100.00%
12
100.00%


STATIC int

xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
{
	struct getbmap __user	*base = (struct getbmap __user *)*ap;

	/* copy only getbmap portion (not getbmapx) */
	if (copy_to_user(base, bmv, sizeof(struct getbmap)))
		return -EFAULT;

	*ap += sizeof(struct getbmap);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
eric sandeen
eric sandeen
58
86.57%
1
20.00%
dave chinner
dave chinner
7
10.45%
2
40.00%
christoph hellwig
christoph hellwig
1
1.49%
1
20.00%
nathan scott
nathan scott
1
1.49%
1
20.00%
Total
67
100.00%
5
100.00%


STATIC int

xfs_ioc_getbmap(
	struct file		*file,
	unsigned int		cmd,
	void			__user *arg)
{
	struct getbmapx		bmx;
	int			error;

	if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
		return -EFAULT;

	if (bmx.bmv_count < 2)
		return -EINVAL;

	bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
	if (file->f_mode & FMODE_NOCMTIME)
		bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;

	error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, xfs_getbmap_format,
			    (__force struct getbmap *)arg+1);
	if (error)
		return error;

	/* copy back header - only size of getbmap */
	if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
		return -EFAULT;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
120
82.19%
3
42.86%
eric sandeen
eric sandeen
21
14.38%
1
14.29%
nathan scott
nathan scott
3
2.05%
1
14.29%
dave chinner
dave chinner
1
0.68%
1
14.29%
stephen lord
stephen lord
1
0.68%
1
14.29%
Total
146
100.00%
7
100.00%


STATIC int

xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
{
	struct getbmapx __user	*base = (struct getbmapx __user *)*ap;

	if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
		return -EFAULT;

	*ap += sizeof(struct getbmapx);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
eric sandeen
eric sandeen
57
86.36%
1
20.00%
dave chinner
dave chinner
7
10.61%
2
40.00%
nathan scott
nathan scott
1
1.52%
1
20.00%
christoph hellwig
christoph hellwig
1
1.52%
1
20.00%
Total
66
100.00%
5
100.00%


STATIC int

xfs_ioc_getbmapx(
	struct xfs_inode	*ip,
	void			__user *arg)
{
	struct getbmapx		bmx;
	int			error;

	if (copy_from_user(&bmx, arg, sizeof(bmx)))
		return -EFAULT;

	if (bmx.bmv_count < 2)
		return -EINVAL;

	if (bmx.bmv_iflags & (~BMV_IF_VALID))
		return -EINVAL;

	error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
			    (__force struct getbmapx *)arg+1);
	if (error)
		return error;

	/* copy back header */
	if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
		return -EFAULT;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
108
88.52%
2
40.00%
eric sandeen
eric sandeen
10
8.20%
1
20.00%
nathan scott
nathan scott
3
2.46%
1
20.00%
dave chinner
dave chinner
1
0.82%
1
20.00%
Total
122
100.00%
5
100.00%


int

xfs_ioc_swapext(
	xfs_swapext_t	*sxp)
{
	xfs_inode_t     *ip, *tip;
	struct fd	f, tmp;
	int		error = 0;

	/* Pull information for the target fd */
	f = fdget((int)sxp->sx_fdtarget);
	if (!f.file) {
		error = -EINVAL;
		goto out;
	}

	if (!(f.file->f_mode & FMODE_WRITE) ||
	    !(f.file->f_mode & FMODE_READ) ||
	    (f.file->f_flags & O_APPEND)) {
		error = -EBADF;
		goto out_put_file;
	}

	tmp = fdget((int)sxp->sx_fdtmp);
	if (!tmp.file) {
		error = -EINVAL;
		goto out_put_file;
	}

	if (!(tmp.file->f_mode & FMODE_WRITE) ||
	    !(tmp.file->f_mode & FMODE_READ) ||
	    (tmp.file->f_flags & O_APPEND)) {
		error = -EBADF;
		goto out_put_tmp_file;
	}

	if (IS_SWAPFILE(file_inode(f.file)) ||
	    IS_SWAPFILE(file_inode(tmp.file))) {
		error = -EINVAL;
		goto out_put_tmp_file;
	}

	/*
         * We need to ensure that the fds passed in point to XFS inodes
         * before we cast and access them as XFS structures as we have no
         * control over what the user passes us here.
         */
	if (f.file->f_op != &xfs_file_operations ||
	    tmp.file->f_op != &xfs_file_operations) {
		error = -EINVAL;
		goto out_put_tmp_file;
	}

	ip = XFS_I(file_inode(f.file));
	tip = XFS_I(file_inode(tmp.file));

	if (ip->i_mount != tip->i_mount) {
		error = -EINVAL;
		goto out_put_tmp_file;
	}

	if (ip->i_ino == tip->i_ino) {
		error = -EINVAL;
		goto out_put_tmp_file;
	}

	if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
		error = -EIO;
		goto out_put_tmp_file;
	}

	error = xfs_swap_extents(ip, tip, sxp);

 out_put_tmp_file:
	fdput(tmp);
 out_put_file:
	fdput(f);
 out:
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
dave chinner
dave chinner
319
91.14%
2
66.67%
jann horn
jann horn
31
8.86%
1
33.33%
Total
350
100.00%
3
100.00%

/*
 * Note: some of the ioctl's return positive numbers as a
 * byte count indicating success, such as readlink_by_handle.
 * So we don't "sign flip" like most other routines.  This means
 * true errors need to be returned as a negative value.
 */

long

xfs_file_ioctl(
	struct file		*filp,
	unsigned int		cmd,
	unsigned long		p)
{
	struct inode		*inode = file_inode(filp);
	struct xfs_inode	*ip = XFS_I(inode);
	struct xfs_mount	*mp = ip->i_mount;
	void			__user *arg = (void __user *)p;
	int			error;

	trace_xfs_file_ioctl(ip);

	switch (cmd) {
	case FITRIM:
		return xfs_ioc_trim(mp, arg);
	case XFS_IOC_ALLOCSP:
	case XFS_IOC_FREESP:
	case XFS_IOC_RESVSP:
	case XFS_IOC_UNRESVSP:
	case XFS_IOC_ALLOCSP64:
	case XFS_IOC_FREESP64:
	case XFS_IOC_RESVSP64:
	case XFS_IOC_UNRESVSP64:
	case XFS_IOC_ZERO_RANGE: {
		xfs_flock64_t		bf;

		if (copy_from_user(&bf, arg, sizeof(bf)))
			return -EFAULT;
		return xfs_ioc_space(filp, cmd, &bf);
	}
	case XFS_IOC_DIOINFO: {
		struct dioattr	da;
		xfs_buftarg_t	*target =
			XFS_IS_REALTIME_INODE(ip) ?
			mp->m_rtdev_targp : mp->m_ddev_targp;

		da.d_mem =  da.d_miniosz = target->bt_logical_sectorsize;
		da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);

		if (copy_to_user(arg, &da, sizeof(da)))
			return -EFAULT;
		return 0;
	}

	case XFS_IOC_FSBULKSTAT_SINGLE:
	case XFS_IOC_FSBULKSTAT:
	case XFS_IOC_FSINUMBERS:
		return xfs_ioc_bulkstat(mp, cmd, arg);

	case XFS_IOC_FSGEOMETRY_V1:
		return xfs_ioc_fsgeometry_v1(mp, arg);

	case XFS_IOC_FSGEOMETRY:
		return xfs_ioc_fsgeometry(mp, arg);

	case XFS_IOC_GETVERSION:
		return put_user(inode->i_generation, (int __user *)arg);

	case XFS_IOC_FSGETXATTR:
		return xfs_ioc_fsgetxattr(ip, 0, arg);
	case XFS_IOC_FSGETXATTRA:
		return xfs_ioc_fsgetxattr(ip, 1, arg);
	case XFS_IOC_FSSETXATTR:
		return xfs_ioc_fssetxattr(ip, filp, arg);
	case XFS_IOC_GETXFLAGS:
		return xfs_ioc_getxflags(ip, arg);
	case XFS_IOC_SETXFLAGS:
		return xfs_ioc_setxflags(ip, filp, arg);

	case XFS_IOC_FSSETDM: {
		struct fsdmidata	dmi;

		if (copy_from_user(&dmi, arg, sizeof(dmi)))
			return -EFAULT;

		error = mnt_want_write_file(filp);
		if (error)
			return error;

		error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
				dmi.fsd_dmstate);
		mnt_drop_write_file(filp);
		return error;
	}

	case XFS_IOC_GETBMAP:
	case XFS_IOC_GETBMAPA:
		return xfs_ioc_getbmap(filp, cmd, arg);

	case XFS_IOC_GETBMAPX:
		return xfs_ioc_getbmapx(ip, arg);

	case XFS_IOC_FD_TO_HANDLE:
	case XFS_IOC_PATH_TO_HANDLE:
	case XFS_IOC_PATH_TO_FSHANDLE: {
		xfs_fsop_handlereq_t	hreq;

		if (copy_from_user(&hreq, arg, sizeof(hreq)))
			return -EFAULT;
		return xfs_find_handle(cmd, &hreq);
	}
	case XFS_IOC_OPEN_BY_HANDLE: {
		xfs_fsop_handlereq_t	hreq;

		if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
			return -EFAULT;
		return xfs_open_by_handle(filp, &hreq);
	}
	case XFS_IOC_FSSETDM_BY_HANDLE:
		return xfs_fssetdm_by_handle(filp, arg);

	case XFS_IOC_READLINK_BY_HANDLE: {
		xfs_fsop_handlereq_t	hreq;

		if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
			return -EFAULT;
		return xfs_readlink_by_handle(filp, &hreq);
	}
	case XFS_IOC_ATTRLIST_BY_HANDLE:
		return xfs_attrlist_by_handle(filp, arg);

	case XFS_IOC_ATTRMULTI_BY_HANDLE:
		return xfs_attrmulti_by_handle(filp, arg);

	case XFS_IOC_SWAPEXT: {
		struct xfs_swapext	sxp;

		if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
			return -EFAULT;
		error = mnt_want_write_file(filp);
		if (error)
			return error;
		error = xfs_ioc_swapext(&sxp);
		mnt_drop_write_file(filp);
		return error;
	}

	case XFS_IOC_FSCOUNTS: {
		xfs_fsop_counts_t out;

		error = xfs_fs_counts(mp, &out);
		if (error)
			return error;

		if (copy_to_user(arg, &out, sizeof(out)))
			return -EFAULT;
		return 0;
	}

	case XFS_IOC_SET_RESBLKS: {
		xfs_fsop_resblks_t inout;
		__uint64_t	   in;

		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;

		if (mp->m_flags & XFS_MOUNT_RDONLY)
			return -EROFS;

		if (copy_from_user(&inout, arg, sizeof(inout)))
			return -EFAULT;

		error = mnt_want_write_file(filp);
		if (error)
			return error;

		/* input parameter is passed in resblks field of structure */
		in = inout.resblks;
		error = xfs_reserve_blocks(mp, &in, &inout);
		mnt_drop_write_file(filp);
		if (error)
			return error;

		if (copy_to_user(arg, &inout, sizeof(inout)))
			return -EFAULT;
		return 0;
	}

	case XFS_IOC_GET_RESBLKS: {
		xfs_fsop_resblks_t out;

		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;

		error = xfs_reserve_blocks(mp, NULL, &out);
		if (error)
			return error;

		if (copy_to_user(arg, &out, sizeof(out)))
			return -EFAULT;

		return 0;
	}

	case XFS_IOC_FSGROWFSDATA: {
		xfs_growfs_data_t in;

		if (copy_from_user(&in, arg, sizeof(in)))
			return -EFAULT;

		error = mnt_want_write_file(filp);
		if (error)
			return error;
		error = xfs_growfs_data(mp, &in);
		mnt_drop_write_file(filp);
		return error;
	}

	case XFS_IOC_FSGROWFSLOG: {
		xfs_growfs_log_t in;

		if (copy_from_user(&in, arg, sizeof(in)))
			return -EFAULT;

		error = mnt_want_write_file(filp);
		if (error)
			return error;
		error = xfs_growfs_log(mp, &in);
		mnt_drop_write_file(filp);
		return error;
	}

	case XFS_IOC_FSGROWFSRT: {
		xfs_growfs_rt_t in;

		if (copy_from_user(&in, arg, sizeof(in)))
			return -EFAULT;

		error = mnt_want_write_file(filp);
		if (error)
			return error;
		error = xfs_growfs_rt(mp, &in);
		mnt_drop_write_file(filp);
		return error;
	}

	case XFS_IOC_GOINGDOWN: {
		__uint32_t in;

		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;

		if (get_user(in, (__uint32_t __user *)arg))
			return -EFAULT;

		return xfs_fs_goingdown(mp, in);
	}

	case XFS_IOC_ERROR_INJECTION: {
		xfs_error_injection_t in;

		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;

		if (copy_from_user(&in, arg, sizeof(in)))
			return -EFAULT;

		return xfs_errortag_add(in.errtag, mp);
	}

	case XFS_IOC_ERROR_CLEARALL:
		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;

		return xfs_errortag_clearall(mp, 1);

	case XFS_IOC_FREE_EOFBLOCKS: {
		struct xfs_fs_eofblocks eofb;
		struct xfs_eofblocks keofb;

		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;

		if (mp->m_flags & XFS_MOUNT_RDONLY)
			return -EROFS;

		if (copy_from_user(&eofb, arg, sizeof(eofb)))
			return -EFAULT;

		error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
		if (error)
			return error;

		return xfs_icache_free_eofblocks(mp, &keofb);
	}

	default:
		return -ENOTTY;
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
lachlan mcilroy
lachlan mcilroy
863
68.87%
3
15.00%
eric sandeen
eric sandeen
132
10.53%
3
15.00%
jan kara
jan kara
114
9.10%
1
5.00%
christoph hellwig
christoph hellwig
49
3.91%
5
25.00%
brian foster
brian foster
43
3.43%
1
5.00%
dwight engen
dwight engen
40
3.19%
2
10.00%
dave chinner
dave chinner
7
0.56%
3
15.00%
al viro
al viro
3
0.24%
1
5.00%
dave hansen
dave hansen
2
0.16%
1
5.00%
Total
1253
100.00%
20
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
4032
48.48%
37
24.67%
dave chinner
dave chinner
1411
16.97%
33
22.00%
lachlan mcilroy
lachlan mcilroy
908
10.92%
4
2.67%
nathan scott
nathan scott
379
4.56%
10
6.67%
darrick j. wong
darrick j. wong
355
4.27%
5
3.33%
eric sandeen
eric sandeen
339
4.08%
8
5.33%
jan kara
jan kara
209
2.51%
2
1.33%
david chinner
david chinner
100
1.20%
5
3.33%
al viro
al viro
60
0.72%
8
5.33%
dave hansen
dave hansen
56
0.67%
1
0.67%
dwight engen
dwight engen
52
0.63%
3
2.00%
andreas gruenbacher
andreas gruenbacher
52
0.63%
2
1.33%
arkadiusz miskiewicz
arkadiusz miskiewicz
49
0.59%
2
1.33%
iustin pop
iustin pop
45
0.54%
1
0.67%
brian foster
brian foster
43
0.52%
1
0.67%
david howells
david howells
38
0.46%
2
1.33%
jann horn
jann horn
31
0.37%
1
0.67%
russell cattelan
russell cattelan
23
0.28%
1
0.67%
li zefan
li zefan
21
0.25%
1
0.67%
zhitong wang
zhitong wang
18
0.22%
1
0.67%
dan rosenberg
dan rosenberg
14
0.17%
1
0.67%
dan carpenter
dan carpenter
10
0.12%
1
0.67%
chandra seetharaman
chandra seetharaman
9
0.11%
1
0.67%
vlad apostolov
vlad apostolov
8
0.10%
1
0.67%
stephen lord
stephen lord
7
0.08%
1
0.67%
alexey dobriyan
alexey dobriyan
5
0.06%
1
0.67%
josef 'jeff' sipek
josef 'jeff' sipek
5
0.06%
1
0.67%
tuomas tynkkynen
tuomas tynkkynen
4
0.05%
1
0.67%
yann droneaud
yann droneaud
4
0.05%
1
0.67%
jeff liu
jeff liu
4
0.05%
1
0.67%
bill o'donnell
bill o'donnell
3
0.04%
1
0.67%
alex elder
alex elder
3
0.04%
1
0.67%
jan tulak
jan tulak
3
0.04%
2
1.33%
randy dunlap
randy dunlap
3
0.04%
1
0.67%
tejun heo
tejun heo
3
0.04%
1
0.67%
michal marek
michal marek
2
0.02%
1
0.67%
miklos szeredi
miklos szeredi
2
0.02%
1
0.67%
hannes eder
hannes eder
2
0.02%
1
0.67%
fengguang wu
fengguang wu
2
0.02%
1
0.67%
andy lutomirski
andy lutomirski
1
0.01%
1
0.67%
eryu guan
eryu guan
1
0.01%
1
0.67%
Total
8316
100.00%
150
100.00%
Directory: fs/xfs

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.