Release 4.10 fs/xfs/xfs_iops.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_da_format.h"
#include "xfs_inode.h"
#include "xfs_bmap.h"
#include "xfs_bmap_util.h"
#include "xfs_acl.h"
#include "xfs_quota.h"
#include "xfs_error.h"
#include "xfs_attr.h"
#include "xfs_trans.h"
#include "xfs_trace.h"
#include "xfs_icache.h"
#include "xfs_symlink.h"
#include "xfs_da_btree.h"
#include "xfs_dir2.h"
#include "xfs_trans_space.h"
#include "xfs_pnfs.h"
#include "xfs_iomap.h"

#include <linux/capability.h>
#include <linux/xattr.h>
#include <linux/posix_acl.h>
#include <linux/security.h>
#include <linux/iomap.h>
#include <linux/slab.h>

/*
 * Directories have different lock order w.r.t. mmap_sem compared to regular
 * files. This is due to readdir potentially triggering page faults on a user
 * buffer inside filldir(), and this happens with the ilock on the directory
 * held. For regular files, the lock order is the other way around - the
 * mmap_sem is taken during the page fault, and then we lock the ilock to do
 * block mapping. Hence we need a different class for the directory ilock so
 * that lockdep can tell them apart.
 */

static struct lock_class_key xfs_nondir_ilock_class;

static struct lock_class_key xfs_dir_ilock_class;


static int

xfs_initxattrs(
	struct inode		*inode,
	const struct xattr	*xattr_array,
	void			*fs_info)
{
	const struct xattr	*xattr;
	struct xfs_inode	*ip = XFS_I(inode);
	int			error = 0;

	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
		error = xfs_attr_set(ip, xattr->name, xattr->value,
				      xattr->value_len, ATTR_SECURE);
		if (error < 0)
			break;
	}
	return error;
}

Contributors
Person
Tokens
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Commits
CommitProp
mimi zohar
mimi zohar
45
50.00%
1
20.00%
nathan scott
nathan scott
35
38.89%
1
20.00%
christoph hellwig
christoph hellwig
6
6.67%
1
20.00%
eric paris
eric paris
3
3.33%
1
20.00%
dave chinner
dave chinner
1
1.11%
1
20.00%
Total
90
100.00%
5
100.00%

/*
 * Hook in SELinux.  This is not quite correct yet, what we really need
 * here (as we do for default ACLs) is a mechanism by which creation of
 * these attrs can be journalled at inode creation time (along with the
 * inode, of course, such that log replay can't cause these to be lost).
 */


STATIC int

xfs_init_security(
	struct inode	*inode,
	struct inode	*dir,
	const struct qstr *qstr)
{
	return security_inode_init_security(inode, dir, qstr,
					     &xfs_initxattrs, NULL);
}

Contributors
Person
Tokens
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Commits
CommitProp
mimi zohar
mimi zohar
29
78.38%
1
50.00%
nathan scott
nathan scott
8
21.62%
1
50.00%
Total
37
100.00%
2
100.00%


static void

xfs_dentry_to_name(
	struct xfs_name	*namep,
	struct dentry	*dentry)
{
	namep->name = dentry->d_name.name;
	namep->len = dentry->d_name.len;
	namep->type = XFS_DIR3_FT_UNKNOWN;
}

Contributors
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amir goldstein
amir goldstein
29
69.05%
1
50.00%
barry naujok
barry naujok
13
30.95%
1
50.00%
Total
42
100.00%
2
100.00%


static int

xfs_dentry_mode_to_name(
	struct xfs_name	*namep,
	struct dentry	*dentry,
	int		mode)
{
	namep->name = dentry->d_name.name;
	namep->len = dentry->d_name.len;
	namep->type = xfs_mode_to_ftype(mode);

	if (unlikely(namep->type == XFS_DIR3_FT_UNKNOWN))
		return -EFSCORRUPTED;

	return 0;
}

Contributors
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amir goldstein
amir goldstein
33
50.00%
2
50.00%
barry naujok
barry naujok
23
34.85%
1
25.00%
dave chinner
dave chinner
10
15.15%
1
25.00%
Total
66
100.00%
4
100.00%


STATIC void

xfs_cleanup_inode(
	struct inode	*dir,
	struct inode	*inode,
	struct dentry	*dentry)
{
	struct xfs_name	teardown;

	/* Oh, the horror.
         * If we can't add the ACL or we fail in
         * xfs_init_security we must back out.
         * ENOSPC can hit here, among other things.
         */
	xfs_dentry_to_name(&teardown, dentry);

	xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
}

Contributors
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yingping lu
yingping lu
25
50.00%
1
16.67%
christoph hellwig
christoph hellwig
12
24.00%
3
50.00%
barry naujok
barry naujok
11
22.00%
1
16.67%
nathan scott
nathan scott
2
4.00%
1
16.67%
Total
50
100.00%
6
100.00%


STATIC int

xfs_generic_create(
	struct inode	*dir,
	struct dentry	*dentry,
	umode_t		mode,
	dev_t		rdev,
	bool		tmpfile)	/* unnamed file */
{
	struct inode	*inode;
	struct xfs_inode *ip = NULL;
	struct posix_acl *default_acl, *acl;
	struct xfs_name	name;
	int		error;

	/*
         * Irix uses Missed'em'V split, but doesn't want to see
         * the upper 5 bits of (14bit) major.
         */
	if (S_ISCHR(mode) || S_ISBLK(mode)) {
		if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
			return -EINVAL;
		rdev = sysv_encode_dev(rdev);
	} else {
		rdev = 0;
	}

	error = posix_acl_create(dir, &mode, &default_acl, &acl);
	if (error)
		return error;

	/* Verify mode is valid also for tmpfile case */
	error = xfs_dentry_mode_to_name(&name, dentry, mode);
	if (unlikely(error))
		goto out_free_acl;

	if (!tmpfile) {
		error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
	} else {
		error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip);
	}
	if (unlikely(error))
		goto out_free_acl;

	inode = VFS_I(ip);

	error = xfs_init_security(inode, dir, &dentry->d_name);
	if (unlikely(error))
		goto out_cleanup_inode;

#ifdef CONFIG_XFS_POSIX_ACL
	if (default_acl) {
		error = xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
		if (error)
			goto out_cleanup_inode;
	}
	if (acl) {
		error = xfs_set_acl(inode, acl, ACL_TYPE_ACCESS);
		if (error)
			goto out_cleanup_inode;
	}
#endif

	xfs_setup_iops(ip);

	if (tmpfile)
		d_tmpfile(dentry, inode);
	else
		d_instantiate(dentry, inode);

	xfs_finish_inode_setup(ip);

 out_free_acl:
	if (default_acl)
		posix_acl_release(default_acl);
	if (acl)
		posix_acl_release(acl);
	return error;

 out_cleanup_inode:
	xfs_finish_inode_setup(ip);
	if (!tmpfile)
		xfs_cleanup_inode(dir, inode, dentry);
	iput(inode);
	goto out_free_acl;
}

Contributors
Person
Tokens
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Commits
CommitProp
christoph hellwig
christoph hellwig
212
56.84%
9
32.14%
brian foster
brian foster
48
12.87%
1
3.57%
nathan scott
nathan scott
40
10.72%
5
17.86%
al viro
al viro
22
5.90%
4
14.29%
amir goldstein
amir goldstein
20
5.36%
1
3.57%
dave chinner
dave chinner
12
3.22%
2
7.14%
barry naujok
barry naujok
8
2.14%
1
3.57%
eric paris
eric paris
5
1.34%
1
3.57%
david chinner
david chinner
3
0.80%
1
3.57%
yingping lu
yingping lu
1
0.27%
1
3.57%
andries brouwer
andries brouwer
1
0.27%
1
3.57%
lachlan mcilroy
lachlan mcilroy
1
0.27%
1
3.57%
Total
373
100.00%
28
100.00%


STATIC int

xfs_vn_mknod(
	struct inode	*dir,
	struct dentry	*dentry,
	umode_t		mode,
	dev_t		rdev)
{
	return xfs_generic_create(dir, dentry, mode, rdev, false);
}

Contributors
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CommitProp
brian foster
brian foster
34
94.44%
1
50.00%
christoph hellwig
christoph hellwig
2
5.56%
1
50.00%
Total
36
100.00%
2
100.00%


STATIC int

xfs_vn_create(
	struct inode	*dir,
	struct dentry	*dentry,
	umode_t		mode,
	bool		flags)
{
	return xfs_vn_mknod(dir, dentry, mode, 0);
}

Contributors
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CommitProp
christoph hellwig
christoph hellwig
26
76.47%
1
16.67%
al viro
al viro
3
8.82%
2
33.33%
nathan scott
nathan scott
2
5.88%
1
16.67%
brian foster
brian foster
2
5.88%
1
16.67%
trond myklebust
trond myklebust
1
2.94%
1
16.67%
Total
34
100.00%
6
100.00%


STATIC int

xfs_vn_mkdir(
	struct inode	*dir,
	struct dentry	*dentry,
	umode_t		mode)
{
	return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
30
90.91%
1
33.33%
nathan scott
nathan scott
2
6.06%
1
33.33%
al viro
al viro
1
3.03%
1
33.33%
Total
33
100.00%
3
100.00%


STATIC struct dentry *

xfs_vn_lookup(
	struct inode	*dir,
	struct dentry	*dentry,
	unsigned int flags)
{
	struct xfs_inode *cip;
	struct xfs_name	name;
	int		error;

	if (dentry->d_name.len >= MAXNAMELEN)
		return ERR_PTR(-ENAMETOOLONG);

	xfs_dentry_to_name(&name, dentry);
	error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
	if (unlikely(error)) {
		if (unlikely(error != -ENOENT))
			return ERR_PTR(error);
		d_add(dentry, NULL);
		return NULL;
	}

	return d_splice_alias(VFS_I(cip), dentry);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
90
73.17%
4
30.77%
barry naujok
barry naujok
16
13.01%
2
15.38%
nathan scott
nathan scott
9
7.32%
3
23.08%
al viro
al viro
3
2.44%
1
7.69%
david chinner
david chinner
3
2.44%
1
7.69%
trond myklebust
trond myklebust
1
0.81%
1
7.69%
dave chinner
dave chinner
1
0.81%
1
7.69%
Total
123
100.00%
13
100.00%


STATIC struct dentry *

xfs_vn_ci_lookup(
	struct inode	*dir,
	struct dentry	*dentry,
	unsigned int flags)
{
	struct xfs_inode *ip;
	struct xfs_name	xname;
	struct xfs_name ci_name;
	struct qstr	dname;
	int		error;

	if (dentry->d_name.len >= MAXNAMELEN)
		return ERR_PTR(-ENAMETOOLONG);

	xfs_dentry_to_name(&xname, dentry);
	error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
	if (unlikely(error)) {
		if (unlikely(error != -ENOENT))
			return ERR_PTR(error);
		/*
                 * call d_add(dentry, NULL) here when d_drop_negative_children
                 * is called in xfs_vn_mknod (ie. allow negative dentries
                 * with CI filesystems).
                 */
		return NULL;
	}

	/* if exact match, just splice and exit */
	if (!ci_name.name)
		return d_splice_alias(VFS_I(ip), dentry);

	/* else case-insensitive match... */
	dname.name = ci_name.name;
	dname.len = ci_name.len;
	dentry = d_add_ci(dentry, VFS_I(ip), &dname);
	kmem_free(ci_name.name);
	return dentry;
}

Contributors
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CommitProp
barry naujok
barry naujok
163
92.61%
2
28.57%
david chinner
david chinner
6
3.41%
1
14.29%
christoph hellwig
christoph hellwig
3
1.70%
2
28.57%
al viro
al viro
3
1.70%
1
14.29%
dave chinner
dave chinner
1
0.57%
1
14.29%
Total
176
100.00%
7
100.00%


STATIC int

xfs_vn_link(
	struct dentry	*old_dentry,
	struct inode	*dir,
	struct dentry	*dentry)
{
	struct inode	*inode = d_inode(old_dentry);
	struct xfs_name	name;
	int		error;

	error = xfs_dentry_mode_to_name(&name, dentry, inode->i_mode);
	if (unlikely(error))
		return error;

	error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
	if (unlikely(error))
		return error;

	ihold(inode);
	d_instantiate(dentry, inode);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
59
56.19%
4
26.67%
barry naujok
barry naujok
14
13.33%
2
13.33%
amir goldstein
amir goldstein
13
12.38%
1
6.67%
nathan scott
nathan scott
11
10.48%
5
33.33%
dave chinner
dave chinner
4
3.81%
1
6.67%
david howells
david howells
3
2.86%
1
6.67%
al viro
al viro
1
0.95%
1
6.67%
Total
105
100.00%
15
100.00%


STATIC int

xfs_vn_unlink(
	struct inode	*dir,
	struct dentry	*dentry)
{
	struct xfs_name	name;
	int		error;

	xfs_dentry_to_name(&name, dentry);

	error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry)));
	if (error)
		return error;

	/*
         * With unlink, the VFS makes the dentry "negative": no inode,
         * but still hashed. This is incompatible with case-insensitive
         * mode, so invalidate (unhash) the dentry in CI-mode.
         */
	if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
		d_invalidate(dentry);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
39
46.99%
3
37.50%
barry naujok
barry naujok
37
44.58%
2
25.00%
nathan scott
nathan scott
4
4.82%
2
25.00%
david howells
david howells
3
3.61%
1
12.50%
Total
83
100.00%
8
100.00%


STATIC int

xfs_vn_symlink(
	struct inode	*dir,
	struct dentry	*dentry,
	const char	*symname)
{
	struct inode	*inode;
	struct xfs_inode *cip = NULL;
	struct xfs_name	name;
	int		error;
	umode_t		mode;

	mode = S_IFLNK |
		(irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
	error = xfs_dentry_mode_to_name(&name, dentry, mode);
	if (unlikely(error))
		goto out;

	error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip);
	if (unlikely(error))
		goto out;

	inode = VFS_I(cip);

	error = xfs_init_security(inode, dir, &dentry->d_name);
	if (unlikely(error))
		goto out_cleanup_inode;

	xfs_setup_iops(cip);

	d_instantiate(dentry, inode);
	xfs_finish_inode_setup(cip);
	return 0;

 out_cleanup_inode:
	xfs_finish_inode_setup(cip);
	xfs_cleanup_inode(dir, inode, dentry);
	iput(inode);
 out:
	return error;
}

Contributors
Person
Tokens
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Commits
CommitProp
christoph hellwig
christoph hellwig
101
53.72%
7
33.33%
nathan scott
nathan scott
30
15.96%
4
19.05%
amir goldstein
amir goldstein
13
6.91%
1
4.76%
barry naujok
barry naujok
13
6.91%
1
4.76%
dave chinner
dave chinner
12
6.38%
2
9.52%
brian foster
brian foster
5
2.66%
1
4.76%
eric paris
eric paris
5
2.66%
1
4.76%
al viro
al viro
3
1.60%
2
9.52%
david chinner
david chinner
3
1.60%
1
4.76%
eric sandeen
eric sandeen
3
1.60%
1
4.76%
Total
188
100.00%
21
100.00%


STATIC int

xfs_vn_rename(
	struct inode	*odir,
	struct dentry	*odentry,
	struct inode	*ndir,
	struct dentry	*ndentry,
	unsigned int	flags)
{
	struct inode	*new_inode = d_inode(ndentry);
	int		omode = 0;
	int		error;
	struct xfs_name	oname;
	struct xfs_name	nname;

	if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
		return -EINVAL;

	/* if we are exchanging files, we need to set i_mode of both files */
	if (flags & RENAME_EXCHANGE)
		omode = d_inode(ndentry)->i_mode;

	error = xfs_dentry_mode_to_name(&oname, odentry, omode);
	if (omode && unlikely(error))
		return error;

	error = xfs_dentry_mode_to_name(&nname, ndentry,
					d_inode(odentry)->i_mode);
	if (unlikely(error))
		return error;

	return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)),
			  XFS_I(ndir), &nname,
			  new_inode ? XFS_I(new_inode) : NULL, flags);
}

Contributors
Person
Tokens
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Commits
CommitProp
christoph hellwig
christoph hellwig
51
28.49%
5
35.71%
carlos maiolino
carlos maiolino
40
22.35%
2
14.29%
barry naujok
barry naujok
31
17.32%
1
7.14%
amir goldstein
amir goldstein
31
17.32%
1
7.14%
david howells
david howells
12
6.70%
1
7.14%
dave chinner
dave chinner
7
3.91%
2
14.29%
nathan scott
nathan scott
7
3.91%
2
14.29%
Total
179
100.00%
14
100.00%

/*
 * careful here - this function can get called recursively, so
 * we need to be very careful about how much stack we use.
 * uio is kmalloced for this reason...
 */

STATIC const char *

xfs_vn_get_link(
	struct dentry		*dentry,
	struct inode		*inode,
	struct delayed_call	*done)
{
	char			*link;
	int			error = -ENOMEM;

	if (!dentry)
		return ERR_PTR(-ECHILD);

	link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
	if (!link)
		goto out_err;

	error = xfs_readlink(XFS_I(d_inode(dentry)), link);
	if (unlikely(error))
		goto out_kfree;

	set_delayed_call(done, kfree_link, link);
	return link;

 out_kfree:
	kfree(link);
 out_err:
	return ERR_PTR(error);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
70
60.34%
3
27.27%
al viro
al viro
38
32.76%
5
45.45%
nathan scott
nathan scott
5
4.31%
2
18.18%
david howells
david howells
3
2.59%
1
9.09%
Total
116
100.00%
11
100.00%


STATIC const char *

xfs_vn_get_link_inline(
	struct dentry		*dentry,
	struct inode		*inode,
	struct delayed_call	*done)
{
	ASSERT(XFS_I(inode)->i_df.if_flags & XFS_IFINLINE);
	return XFS_I(inode)->i_df.if_u1.if_data;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
48
97.96%
1
50.00%
nathan scott
nathan scott
1
2.04%
1
50.00%
Total
49
100.00%
2
100.00%


STATIC int

xfs_vn_getattr(
	struct vfsmount		*mnt,
	struct dentry		*dentry,
	struct kstat		*stat)
{
	struct inode		*inode = d_inode(dentry);
	struct xfs_inode	*ip = XFS_I(inode);
	struct xfs_mount	*mp = ip->i_mount;

	trace_xfs_getattr(ip);

	if (XFS_FORCED_SHUTDOWN(mp))
		return -EIO;

	stat->size = XFS_ISIZE(ip);
	stat->dev = inode->i_sb->s_dev;
	stat->mode = inode->i_mode;
	stat->nlink = inode->i_nlink;
	stat->uid = inode->i_uid;
	stat->gid = inode->i_gid;
	stat->ino = ip->i_ino;
	stat->atime = inode->i_atime;
	stat->mtime = inode->i_mtime;
	stat->ctime = inode->i_ctime;
	stat->blocks =
		XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);


	switch (inode->i_mode & S_IFMT) {
	case S_IFBLK:
	case S_IFCHR:
		stat->blksize = BLKDEV_IOSIZE;
		stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
				   sysv_minor(ip->i_df.if_u2.if_rdev));
		break;
	default:
		if (XFS_IS_REALTIME_INODE(ip)) {
			/*
                         * If the file blocks are being allocated from a
                         * realtime volume, then return the inode's realtime
                         * extent size or the realtime volume's extent size.
                         */
			stat->blksize =
				xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
		} else
			stat->blksize = xfs_preferred_iosize(mp);
		stat->rdev = 0;
		break;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
192
71.64%
7
46.67%
nathan scott
nathan scott
61
22.76%
2
13.33%
dwight engen
dwight engen
4
1.49%
1
6.67%
dave chinner
dave chinner
4
1.49%
2
13.33%
eric sandeen
eric sandeen
3
1.12%
1
6.67%
david howells
david howells
3
1.12%
1
6.67%
mitsuo hayasaka
mitsuo hayasaka
1
0.37%
1
6.67%
Total
268
100.00%
15
100.00%


static void

xfs_setattr_mode(
	struct xfs_inode	*ip,
	struct iattr		*iattr)
{
	struct inode		*inode = VFS_I(ip);
	umode_t			mode = iattr->ia_mode;

	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));

	inode->i_mode &= S_IFMT;
	inode->i_mode |= mode & ~S_IFMT;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
dave chinner
dave chinner
58
100.00%
1
100.00%
Total
58
100.00%
1
100.00%


void

xfs_setattr_time(
	struct xfs_inode	*ip,
	struct iattr		*iattr)
{
	struct inode		*inode = VFS_I(ip);

	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));

	if (iattr->ia_valid & ATTR_ATIME)
		inode->i_atime = iattr->ia_atime;
	if (iattr->ia_valid & ATTR_CTIME)
		inode->i_ctime = iattr->ia_ctime;
	if (iattr->ia_valid & ATTR_MTIME)
		inode->i_mtime = iattr->ia_mtime;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
83
100.00%
1
100.00%
Total
83
100.00%
1
100.00%


static int

xfs_vn_change_ok(
	struct dentry	*dentry,
	struct iattr	*iattr)
{
	struct xfs_mount	*mp = XFS_I(d_inode(dentry))->i_mount;

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

	if (XFS_FORCED_SHUTDOWN(mp))
		return -EIO;

	return setattr_prepare(dentry, iattr);
}

Contributors
Person
Tokens
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CommitProp
jan kara
jan kara
62
100.00%
2
100.00%
Total
62
100.00%
2
100.00%

/*
 * Set non-size attributes of an inode.
 *
 * Caution: The caller of this function is responsible for calling
 * setattr_prepare() or otherwise verifying the change is fine.
 */

int

xfs_setattr_nonsize(
	struct xfs_inode	*ip,
	struct iattr		*iattr,
	int			flags)
{
	xfs_mount_t		*mp = ip->i_mount;
	struct inode		*inode = VFS_I(ip);
	int			mask = iattr->ia_valid;
	xfs_trans_t		*tp;
	int			error;
	kuid_t			uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID;
	kgid_t			gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID;
	struct xfs_dquot	*udqp = NULL, *gdqp = NULL;
	struct xfs_dquot	*olddquot1 = NULL, *olddquot2 = NULL;

	ASSERT((mask & ATTR_SIZE) == 0);

	/*
         * 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) && (mask & (ATTR_UID|ATTR_GID))) {
		uint	qflags = 0;

		if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
			uid = iattr->ia_uid;
			qflags |= XFS_QMOPT_UQUOTA;
		} else {
			uid = inode->i_uid;
		}
		if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
			gid = iattr->ia_gid;
			qflags |= XFS_QMOPT_GQUOTA;
		}  else {
			gid = inode->i_gid;
		}

		/*
                 * We take a reference when we initialize udqp and gdqp,
                 * so it is important that we never blindly double trip on
                 * the same variable. See xfs_create() for an example.
                 */
		ASSERT(udqp == NULL);
		ASSERT(gdqp == NULL);
		error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid),
					   xfs_kgid_to_gid(gid),
					   xfs_get_projid(ip),
					   qflags, &udqp, &gdqp, NULL);
		if (error)
			return error;
	}

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

	xfs_ilock(ip, XFS_ILOCK_EXCL);
	xfs_trans_ijoin(tp, ip, 0);

	/*
         * Change file ownership.  Must be the owner or privileged.
         */
	if (mask & (ATTR_UID|ATTR_GID)) {
		/*
                 * These IDs could have changed since we last looked at them.
                 * But, we're assured that if the ownership did change
                 * while we didn't have the inode locked, inode's dquot(s)
                 * would have changed also.
                 */
		iuid = inode->i_uid;
		igid = inode->i_gid;
		gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
		uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;

		/*
                 * Do a quota reservation only if uid/gid is actually
                 * going to change.
                 */
		if (XFS_IS_QUOTA_RUNNING(mp) &&
		    ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) ||
		     (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) {
			ASSERT(tp);
			error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
						NULL, capable(CAP_FOWNER) ?
						XFS_QMOPT_FORCE_RES : 0);
			if (error)	/* out of quota */
				goto out_cancel;
		}
	}

	/*
         * Change file ownership.  Must be the owner or privileged.
         */
	if (mask & (ATTR_UID|ATTR_GID)) {
		/*
                 * 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 ((inode->i_mode & (S_ISUID|S_ISGID)) &&
		    !capable(CAP_FSETID))
			inode->i_mode &= ~(S_ISUID|S_ISGID);

		/*
                 * Change the ownerships and register quota modifications
                 * in the transaction.
                 */
		if (!uid_eq(iuid, uid)) {
			if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) {
				ASSERT(mask & ATTR_UID);
				ASSERT(udqp);
				olddquot1 = xfs_qm_vop_chown(tp, ip,
							&ip->i_udquot, udqp);
			}
			ip->i_d.di_uid = xfs_kuid_to_uid(uid);
			inode->i_uid = uid;
		}
		if (!gid_eq(igid, gid)) {
			if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
				ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) ||
				       !XFS_IS_PQUOTA_ON(mp));
				ASSERT(mask & ATTR_GID);
				ASSERT(gdqp);
				olddquot2 = xfs_qm_vop_chown(tp, ip,
							&ip->i_gdquot, gdqp);
			}
			ip->i_d.di_gid = xfs_kgid_to_gid(gid);
			inode->i_gid = gid;
		}
	}

	if (mask & ATTR_MODE)
		xfs_setattr_mode(ip, iattr);
	if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
		xfs_setattr_time(ip, iattr);

	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);

	XFS_STATS_INC(mp, xs_ig_attrchg);

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

	xfs_iunlock(ip, XFS_ILOCK_EXCL);

	/*
         * Release any dquot(s) the inode had kept before chown.
         */
	xfs_qm_dqrele(olddquot1);
	xfs_qm_dqrele(olddquot2);
	xfs_qm_dqrele(udqp);
	xfs_qm_dqrele(gdqp);

	if (error)
		return error;

	/*
         * XXX(hch): Updating the ACL entries is not atomic vs the i_mode
         *           update.  We could avoid this with linked transactions
         *           and passing down the transaction pointer all the way
         *           to attr_set.  No previous user of the generic
         *           Posix ACL code seems to care about this issue either.
         */
	if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
		error = posix_acl_chmod(inode, inode->i_mode);
		if (error)
			return error;
	}

	return 0;

out_cancel:
	xfs_trans_cancel(tp);
out_dqrele:
	xfs_qm_dqrele(udqp);
	xfs_qm_dqrele(gdqp);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
722
90.36%
6
42.86%
dwight engen
dwight engen
46
5.76%
1
7.14%
jeff liu
jeff liu
12
1.50%
2
14.29%
dave chinner
dave chinner
8
1.00%
2
14.29%
eric sandeen
eric sandeen
5
0.63%
1
7.14%
chandra seetharaman
chandra seetharaman
4
0.50%
1
7.14%
bill o'donnell
bill o'donnell
2
0.25%
1
7.14%
Total
799
100.00%
14
100.00%


int

xfs_vn_setattr_nonsize(
	struct dentry		*dentry,
	struct iattr		*iattr)
{
	struct xfs_inode	*ip = XFS_I(d_inode(dentry));
	int error;

	trace_xfs_setattr(ip);

	error = xfs_vn_change_ok(dentry, iattr);
	if (error)
		return error;
	return xfs_setattr_nonsize(ip, iattr, 0);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
jan kara
jan kara
62
100.00%
1
100.00%
Total
62
100.00%
1
100.00%

/*
 * Truncate file.  Must have write permission and not be a directory.
 *
 * Caution: The caller of this function is responsible for calling
 * setattr_prepare() or otherwise verifying the change is fine.
 */

int

xfs_setattr_size(
	struct xfs_inode	*ip,
	struct iattr		*iattr)
{
	struct xfs_mount	*mp = ip->i_mount;
	struct inode		*inode = VFS_I(ip);
	xfs_off_t		oldsize, newsize;
	struct xfs_trans	*tp;
	int			error;
	uint			lock_flags = 0;
	bool			did_zeroing = false;

	ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
	ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
	ASSERT(S_ISREG(inode->i_mode));
	ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
		ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);

	oldsize = inode->i_size;
	newsize = iattr->ia_size;

	/*
         * Short circuit the truncate case for zero length files.
         */
	if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) {
		if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME)))
			return 0;

		/*
                 * Use the regular setattr path to update the timestamps.
                 */
		iattr->ia_valid &= ~ATTR_SIZE;
		return xfs_setattr_nonsize(ip, iattr, 0);
	}

	/*
         * Make sure that the dquots are attached to the inode.
         */
	error = xfs_qm_dqattach(ip, 0);
	if (error)
		return error;

	/*
         * Wait for all direct I/O to complete.
         */
	inode_dio_wait(inode);

	/*
         * File data changes must be complete before we start the transaction to
         * modify the inode.  This needs to be done before joining the inode to
         * the transaction because the inode cannot be unlocked once it is a
         * part of the transaction.
         *
         * Start with zeroing any data beyond EOF that we may expose on file
         * extension, or zeroing out the rest of the block on a downward
         * truncate.
         */
	if (newsize > oldsize) {
		error = xfs_zero_eof(ip, newsize, oldsize, &did_zeroing);
	} else {
		error = iomap_truncate_page(inode, newsize, &did_zeroing,
				&xfs_iomap_ops);
	}

	if (error)
		return error;

	/*
         * We are going to log the inode size change in this transaction so
         * any previous writes that are beyond the on disk EOF and the new
         * EOF that have not been written out need to be written here.  If we
         * do not write the data out, we expose ourselves to the null files
         * problem. Note that this includes any block zeroing we did above;
         * otherwise those blocks may not be zeroed after a crash.
         */
	if (did_zeroing ||
	    (newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) {
		error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
						      ip->i_d.di_size, newsize);
		if (error)
			return error;
	}

	/*
         * We've already locked out new page faults, so now we can safely remove
         * pages from the page cache knowing they won't get refaulted until we
         * drop the XFS_MMAP_EXCL lock after the extent manipulations are
         * complete. The truncate_setsize() call also cleans partial EOF page
         * PTEs on extending truncates and hence ensures sub-page block size
         * filesystems are correctly handled, too.
         *
         * We have to do all the page cache truncate work outside the
         * transaction context as the "lock" order is page lock->log space
         * reservation as defined by extent allocation in the writeback path.
         * Hence a truncate can fail with ENOMEM from xfs_trans_alloc(), but
         * having already truncated the in-memory version of the file (i.e. made
         * user visible changes). There's not much we can do about this, except
         * to hope that the caller sees ENOMEM and retries the truncate
         * operation.
         */
	truncate_setsize(inode, newsize);

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

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

	/*
         * Only change the c/mtime if we are changing the size or we are
         * explicitly asked to change it.  This handles the semantic difference
         * between truncate() and ftruncate() as implemented in the VFS.
         *
         * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
         * special case where we need to update the times despite not having
         * these flags set.  For all other operations the VFS set these flags
         * explicitly if it wants a timestamp update.
         */
	if (newsize != oldsize &&
	    !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
		iattr->ia_ctime = iattr->ia_mtime =
			current_time(inode);
		iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
	}

	/*
         * The first thing we do is set the size to new_size permanently on
         * disk.  This way we don't have to worry about anyone ever being able
         * to look at the data being freed even in the face of a crash.
         * What we're getting around here is the case where we free a block, it
         * is allocated to another file, it is written to, and then we crash.
         * If the new data gets written to the file but the log buffers
         * containing the free and reallocation don't, then we'd end up with
         * garbage in the blocks being freed.  As long as we make the new size
         * permanent before actually freeing any blocks it doesn't matter if
         * they get written to.
         */
	ip->i_d.di_size = newsize;
	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);

	if (newsize <= oldsize) {
		error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
		if (error)
			goto out_trans_cancel;

		/*
                 * Truncated "down", so we're removing references to old data
                 * here - if we delay flushing for a long time, we expose
                 * ourselves unduly to the notorious NULL files problem.  So,
                 * we mark this inode and flush it when the file is closed,
                 * and do not wait the usual (long) time for writeout.
                 */
		xfs_iflags_set(ip, XFS_ITRUNCATED);

		/* A truncate down always removes post-EOF blocks. */
		xfs_inode_clear_eofblocks_tag(ip);
	}

	if (iattr->ia_valid & ATTR_MODE)
		xfs_setattr_mode(ip, iattr);
	if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
		xfs_setattr_time(ip, iattr);

	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);

	XFS_STATS_INC(mp, xs_ig_attrchg);

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

	error = xfs_trans_commit(tp);
out_unlock:
	if (lock_flags)
		xfs_iunlock(ip, lock_flags);
	return error;

out_trans_cancel:
	xfs_trans_cancel(tp);
	goto out_unlock;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
502
88.54%
13
56.52%
dave chinner
dave chinner
51
8.99%
6
26.09%
brian foster
brian foster
6
1.06%
1
4.35%
jeff liu
jeff liu
5
0.88%
1
4.35%
bill o'donnell
bill o'donnell
2
0.35%
1
4.35%
deepa dinamani
deepa dinamani
1
0.18%
1
4.35%
Total
567
100.00%
23
100.00%


int

xfs_vn_setattr_size(
	struct dentry		*dentry,
	struct iattr		*iattr)
{
	struct xfs_inode	*ip = XFS_I(d_inode(dentry));
	int error;

	trace_xfs_setattr(ip);

	error = xfs_vn_change_ok(dentry, iattr);
	if (error)
		return error;
	return xfs_setattr_size(ip, iattr);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
jan kara
jan kara
31
51.67%
1
25.00%
christoph hellwig
christoph hellwig
26
43.33%
2
50.00%
david howells
david howells
3
5.00%
1
25.00%
Total
60
100.00%
4
100.00%


STATIC int

xfs_vn_setattr(
	struct dentry		*dentry,
	struct iattr		*iattr)
{
	int			error;

	if (iattr->ia_valid & ATTR_SIZE) {
		struct xfs_inode	*ip = XFS_I(d_inode(dentry));
		uint			iolock = XFS_IOLOCK_EXCL;

		error = xfs_break_layouts(d_inode(dentry), &iolock);
		if (error)
			return error;

		xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
		error = xfs_vn_setattr_size(dentry, iattr);
		xfs_iunlock(ip, XFS_MMAPLOCK_EXCL);
	} else {
		error = xfs_vn_setattr_nonsize(dentry, iattr);
	}

	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
60
57.14%
6
60.00%
jan kara
jan kara
33
31.43%
1
10.00%
dave chinner
dave chinner
7
6.67%
1
10.00%
david howells
david howells
3
2.86%
1
10.00%
eryu guan
eryu guan
2
1.90%
1
10.00%
Total
105
100.00%
10
100.00%


STATIC int

xfs_vn_update_time(
	struct inode		*inode,
	struct timespec		*now,
	int			flags)
{
	struct xfs_inode	*ip = XFS_I(inode);
	struct xfs_mount	*mp = ip->i_mount;
	struct xfs_trans	*tp;
	int			error;

	trace_xfs_update_time(ip);

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

	xfs_ilock(ip, XFS_ILOCK_EXCL);
	if (flags & S_CTIME)
		inode->i_ctime = *now;
	if (flags & S_MTIME)
		inode->i_mtime = *now;
	if (flags & S_ATIME)
		inode->i_atime = *now;

	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
	xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
	return xfs_trans_commit(tp);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
148
97.37%
2
66.67%
jeff liu
jeff liu
4
2.63%
1
33.33%
Total
152
100.00%
3
100.00%


STATIC int

xfs_vn_fiemap(
	struct inode		*inode,
	struct fiemap_extent_info *fieinfo,
	u64			start,
	u64			length)
{
	int			error;

	xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED);
	if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
		fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR;
		error = iomap_fiemap(inode, fieinfo, start, length,
				&xfs_xattr_iomap_ops);
	} else {
		error = iomap_fiemap(inode, fieinfo, start, length,
				&xfs_iomap_ops);
	}
	xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED);

	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
55
55.00%
2
40.00%
eric sandeen
eric sandeen
41
41.00%
1
20.00%
tao ma
tao ma
3
3.00%
1
20.00%
brian foster
brian foster
1
1.00%
1
20.00%
Total
100
100.00%
5
100.00%


STATIC int

xfs_vn_tmpfile(
	struct inode	*dir,
	struct dentry	*dentry,
	umode_t		mode)
{
	return xfs_generic_create(dir, dentry, mode, 0, true);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
zhi yong wu
zhi yong wu
24
72.73%
1
33.33%
brian foster
brian foster
9
27.27%
2
66.67%
Total
33
100.00%
3
100.00%


static const struct inode_operations xfs_inode_operations = {
	.get_acl		= xfs_get_acl,
	.set_acl		= xfs_set_acl,
	.getattr		= xfs_vn_getattr,
	.setattr		= xfs_vn_setattr,
	.listxattr		= xfs_vn_listxattr,
	.fiemap			= xfs_vn_fiemap,
	.update_time		= xfs_vn_update_time,
};


static const struct inode_operations xfs_dir_inode_operations = {
	.create			= xfs_vn_create,
	.lookup			= xfs_vn_lookup,
	.link			= xfs_vn_link,
	.unlink			= xfs_vn_unlink,
	.symlink		= xfs_vn_symlink,
	.mkdir			= xfs_vn_mkdir,
	/*
         * Yes, XFS uses the same method for rmdir and unlink.
         *
         * There are some subtile differences deeper in the code,
         * but we use S_ISDIR to check for those.
         */
	.rmdir			= xfs_vn_unlink,
	.mknod			= xfs_vn_mknod,
	.rename			= xfs_vn_rename,
	.get_acl		= xfs_get_acl,
	.set_acl		= xfs_set_acl,
	.getattr		= xfs_vn_getattr,
	.setattr		= xfs_vn_setattr,
	.listxattr		= xfs_vn_listxattr,
	.update_time		= xfs_vn_update_time,
	.tmpfile		= xfs_vn_tmpfile,
};


static const struct inode_operations xfs_dir_ci_inode_operations = {
	.create			= xfs_vn_create,
	.lookup			= xfs_vn_ci_lookup,
	.link			= xfs_vn_link,
	.unlink			= xfs_vn_unlink,
	.symlink		= xfs_vn_symlink,
	.mkdir			= xfs_vn_mkdir,
	/*
         * Yes, XFS uses the same method for rmdir and unlink.
         *
         * There are some subtile differences deeper in the code,
         * but we use S_ISDIR to check for those.
         */
	.rmdir			= xfs_vn_unlink,
	.mknod			= xfs_vn_mknod,
	.rename			= xfs_vn_rename,
	.get_acl		= xfs_get_acl,
	.set_acl		= xfs_set_acl,
	.getattr		= xfs_vn_getattr,
	.setattr		= xfs_vn_setattr,
	.listxattr		= xfs_vn_listxattr,
	.update_time		= xfs_vn_update_time,
	.tmpfile		= xfs_vn_tmpfile,
};


static const struct inode_operations xfs_symlink_inode_operations = {
	.get_link		= xfs_vn_get_link,
	.getattr		= xfs_vn_getattr,
	.setattr		= xfs_vn_setattr,
	.listxattr		= xfs_vn_listxattr,
	.update_time		= xfs_vn_update_time,
};


static const struct inode_operations xfs_inline_symlink_inode_operations = {
	.get_link		= xfs_vn_get_link_inline,
	.getattr		= xfs_vn_getattr,
	.setattr		= xfs_vn_setattr,
	.listxattr		= xfs_vn_listxattr,
	.update_time		= xfs_vn_update_time,
};


STATIC void

xfs_diflags_to_iflags(
	struct inode		*inode,
	struct xfs_inode	*ip)
{
	uint16_t		flags = ip->i_d.di_flags;

	inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC |
			    S_NOATIME | S_DAX);

	if (flags & XFS_DIFLAG_IMMUTABLE)
		inode->i_flags |= S_IMMUTABLE;
	if (flags & XFS_DIFLAG_APPEND)
		inode->i_flags |= S_APPEND;
	if (flags & XFS_DIFLAG_SYNC)
		inode->i_flags |= S_SYNC;
	if (flags & XFS_DIFLAG_NOATIME)
		inode->i_flags |= S_NOATIME;
	if (S_ISREG(inode->i_mode) &&
	    ip->i_mount->m_sb.sb_blocksize == PAGE_SIZE &&
	    !xfs_is_reflink_inode(ip) &&
	    (ip->i_mount->m_flags & XFS_MOUNT_DAX ||
	     ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))
		inode->i_flags |= S_DAX;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
68
48.92%
1
16.67%
dave chinner
dave chinner
65
46.76%
4
66.67%
darrick j. wong
darrick j. wong
6
4.32%
1
16.67%
Total
139
100.00%
6
100.00%

/*
 * Initialize the Linux inode.
 *
 * When reading existing inodes from disk this is called directly from xfs_iget,
 * when creating a new inode it is called from xfs_ialloc after setting up the
 * inode. These callers have different criteria for clearing XFS_INEW, so leave
 * it up to the caller to deal with unlocking the inode appropriately.
 */

void

xfs_setup_inode(
	struct xfs_inode	*ip)
{
	struct inode		*inode = &ip->i_vnode;
	gfp_t			gfp_mask;

	inode->i_ino = ip->i_ino;
	inode->i_state = I_NEW;

	inode_sb_list_add(inode);
	/* make the inode look hashed for the writeback code */
	hlist_add_fake(&inode->i_hash);

	inode->i_uid    = xfs_uid_to_kuid(ip->i_d.di_uid);
	inode->i_gid    = xfs_gid_to_kgid(ip->i_d.di_gid);

	switch (inode->i_mode & S_IFMT) {
	case S_IFBLK:
	case S_IFCHR:
		inode->i_rdev =
			MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
			      sysv_minor(ip->i_df.if_u2.if_rdev));
		break;
	default:
		inode->i_rdev = 0;
		break;
	}

	i_size_write(inode, ip->i_d.di_size);
	xfs_diflags_to_iflags(inode, ip);

	if (S_ISDIR(inode->i_mode)) {
		lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
		ip->d_ops = ip->i_mount->m_dir_inode_ops;
	} else {
		ip->d_ops = ip->i_mount->m_nondir_inode_ops;
		lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
	}

	/*
         * Ensure all page cache allocations are done from GFP_NOFS context to
         * prevent direct reclaim recursion back into the filesystem and blowing
         * stacks or deadlocking.
         */
	gfp_mask = mapping_gfp_mask(inode->i_mapping);
	mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));

	/*
         * If there is no attribute fork no ACL can exist on this inode,
         * and it can't have any file capabilities attached to it either.
         */
	if (!XFS_IFORK_Q(ip)) {
		inode_has_no_xattr(inode);
		cache_no_acl(inode);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
207
80.23%
4
44.44%
david chinner
david chinner
29
11.24%
2
22.22%
dave chinner
dave chinner
16
6.20%
2
22.22%
dwight engen
dwight engen
6
2.33%
1
11.11%
Total
258
100.00%
9
100.00%


void

xfs_setup_iops(
	struct xfs_inode	*ip)
{
	struct inode		*inode = &ip->i_vnode;

	switch (inode->i_mode & S_IFMT) {
	case S_IFREG:
		inode->i_op = &xfs_inode_operations;
		inode->i_fop = &xfs_file_operations;
		inode->i_mapping->a_ops = &xfs_address_space_operations;
		break;
	case S_IFDIR:
		if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
			inode->i_op = &xfs_dir_ci_inode_operations;
		else
			inode->i_op = &xfs_dir_inode_operations;
		inode->i_fop = &xfs_dir_file_operations;
		break;
	case S_IFLNK:
		if (ip->i_df.if_flags & XFS_IFINLINE)
			inode->i_op = &xfs_inline_symlink_inode_operations;
		else
			inode->i_op = &xfs_symlink_inode_operations;
		break;
	default:
		inode->i_op = &xfs_inode_operations;
		init_special_inode(inode, inode->i_mode, inode->i_rdev);
		break;
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
149
100.00%
3
100.00%
Total
149
100.00%
3
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
christoph hellwig
christoph hellwig
3155
62.24%
51
33.77%
barry naujok
barry naujok
395
7.79%
4
2.65%
dave chinner
dave chinner
299
5.90%
25
16.56%
nathan scott
nathan scott
237
4.68%
13
8.61%
jan kara
jan kara
190
3.75%
2
1.32%
amir goldstein
amir goldstein
139
2.74%
2
1.32%
brian foster
brian foster
107
2.11%
4
2.65%
al viro
al viro
78
1.54%
16
10.60%
mimi zohar
mimi zohar
75
1.48%
1
0.66%
dwight engen
dwight engen
56
1.10%
1
0.66%
eric sandeen
eric sandeen
55
1.09%
4
2.65%
david chinner
david chinner
48
0.95%
4
2.65%
carlos maiolino
carlos maiolino
40
0.79%
2
1.32%
zhi yong wu
zhi yong wu
37
0.73%
1
0.66%
david howells
david howells
30
0.59%
1
0.66%
yingping lu
yingping lu
26
0.51%
1
0.66%
russell cattelan
russell cattelan
24
0.47%
1
0.66%
jeff liu
jeff liu
21
0.41%
2
1.32%
eric paris
eric paris
13
0.26%
1
0.66%
lachlan mcilroy
lachlan mcilroy
9
0.18%
1
0.66%
darrick j. wong
darrick j. wong
6
0.12%
1
0.66%
chandra seetharaman
chandra seetharaman
4
0.08%
1
0.66%
bill o'donnell
bill o'donnell
4
0.08%
1
0.66%
tao ma
tao ma
3
0.06%
1
0.66%
arjan van de ven
arjan van de ven
3
0.06%
1
0.66%
tejun heo
tejun heo
3
0.06%
1
0.66%
randy dunlap
randy dunlap
3
0.06%
1
0.66%
miklos szeredi
miklos szeredi
2
0.04%
1
0.66%
eryu guan
eryu guan
2
0.04%
1
0.66%
trond myklebust
trond myklebust
2
0.04%
2
1.32%
mitsuo hayasaka
mitsuo hayasaka
1
0.02%
1
0.66%
andries brouwer
andries brouwer
1
0.02%
1
0.66%
deepa dinamani
deepa dinamani
1
0.02%
1
0.66%
Total
5069
100.00%
151
100.00%
Directory: fs/xfs

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