[mirror_zfs.git] / module / zfs / zpl_inode.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2011, Lawrence Livermore National Security, LLC.
 */


#include <sys/zfs_vfsops.h>
#include <sys/zfs_vnops.h>
#include <sys/vfs.h>
#include <sys/zpl.h>


static struct dentry *
zpl_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
{
	cred_t *cr = CRED();
	struct inode *ip;
	int error;

	crhold(cr);
	error = -zfs_lookup(dir, dname(dentry), &ip, 0, cr, NULL, NULL);
	ASSERT3S(error, <=, 0);
	crfree(cr);

	if (error) {
		if (error == -ENOENT)
			return d_splice_alias(NULL, dentry);
		else
			return ERR_PTR(error);
	}

	return d_splice_alias(ip, dentry);
}

static int
zpl_create(struct inode *dir, struct dentry *dentry, int mode,
    struct nameidata *nd)
{
	cred_t *cr = CRED();
	struct inode *ip;
	vattr_t *vap;
	int error;

	crhold(cr);
	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
	vap->va_mode = mode;
	vap->va_mask = ATTR_MODE;
	vap->va_uid = crgetfsuid(cr);
	vap->va_gid = crgetfsgid(cr);
	vap->va_dentry = dentry;

	error = -zfs_create(dir, (char *)dentry->d_name.name,
	    vap, 0, mode, &ip, cr, 0, NULL);
	kmem_free(vap, sizeof(vattr_t));
	crfree(cr);
	ASSERT3S(error, <=, 0);

	return (error);
}

static int
zpl_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
{
	cred_t *cr = CRED();
	struct inode *ip;
	vattr_t *vap;
	int error;

	/*
	 * We currently expect Linux to supply rdev=0 for all sockets
	 * and fifos, but we want to know if this behavior ever changes.
	 */
	if (S_ISSOCK(mode) || S_ISFIFO(mode))
		ASSERT(rdev == 0);

	crhold(cr);
	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
	vap->va_mode = mode;
	vap->va_mask = ATTR_MODE;
	vap->va_rdev = rdev;
	vap->va_uid = crgetfsuid(cr);
	vap->va_gid = crgetfsgid(cr);
	vap->va_dentry = dentry;

	error = -zfs_create(dir, (char *)dentry->d_name.name,
	    vap, 0, mode, &ip, cr, 0, NULL);
	kmem_free(vap, sizeof(vattr_t));
	crfree(cr);
	ASSERT3S(error, <=, 0);

	return (-error);
}

static int
zpl_unlink(struct inode *dir, struct dentry *dentry)
{
	cred_t *cr = CRED();
	int error;

	crhold(cr);
	error = -zfs_remove(dir, dname(dentry), cr);
	crfree(cr);
	ASSERT3S(error, <=, 0);

	return (error);
}

static int
zpl_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
	cred_t *cr = CRED();
	vattr_t *vap;
	struct inode *ip;
	int error;

	crhold(cr);
	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
	vap->va_mode = S_IFDIR | mode;
	vap->va_mask = ATTR_MODE;
	vap->va_uid = crgetfsuid(cr);
	vap->va_gid = crgetfsgid(cr);
	vap->va_dentry = dentry;

	error = -zfs_mkdir(dir, dname(dentry), vap, &ip, cr, 0, NULL);
	kmem_free(vap, sizeof(vattr_t));
	crfree(cr);
	ASSERT3S(error, <=, 0);

	return (error);
}

static int
zpl_rmdir(struct inode * dir, struct dentry *dentry)
{
	cred_t *cr = CRED();
	int error;

	crhold(cr);
	error = -zfs_rmdir(dir, dname(dentry), NULL, cr, 0);
	crfree(cr);
	ASSERT3S(error, <=, 0);

	return (error);
}

static int
zpl_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
{
	cred_t *cr = CRED();
	vattr_t *vap;
	struct inode *ip;
	int error;

	ip = dentry->d_inode;
	crhold(cr);
	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);

	error = -zfs_getattr(ip, vap, 0, cr);
	if (error)
		goto out;

	stat->ino = ip->i_ino;
	stat->dev = ip->i_sb->s_dev;
	stat->mode = vap->va_mode;
	stat->nlink = vap->va_nlink;
	stat->uid = vap->va_uid;
	stat->gid = vap->va_gid;
	stat->rdev = vap->va_rdev;
	stat->size = vap->va_size;
	stat->atime = vap->va_atime;
	stat->mtime = vap->va_mtime;
	stat->ctime = vap->va_ctime;
	stat->blksize = vap->va_blksize;
	stat->blocks = vap->va_nblocks;
out:
	kmem_free(vap, sizeof(vattr_t));
	crfree(cr);
	ASSERT3S(error, <=, 0);

	return (error);
}

static int
zpl_setattr(struct dentry *dentry, struct iattr *ia)
{
	cred_t *cr = CRED();
	vattr_t *vap;
	int error;

	error = inode_change_ok(dentry->d_inode, ia);
	if (error)
		return (error);

	crhold(cr);
	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
	vap->va_mask = ia->ia_valid & ATTR_IATTR_MASK;
	vap->va_mode = ia->ia_mode;
	vap->va_uid = ia->ia_uid;
	vap->va_gid = ia->ia_gid;
	vap->va_size = ia->ia_size;
	vap->va_atime = ia->ia_atime;
	vap->va_mtime = ia->ia_mtime;
	vap->va_ctime = ia->ia_ctime;

	error = -zfs_setattr(dentry->d_inode, vap, 0, cr);

	kmem_free(vap, sizeof(vattr_t));
	crfree(cr);
	ASSERT3S(error, <=, 0);

	return (error);
}

static int
zpl_rename(struct inode *sdip, struct dentry *sdentry,
    struct inode *tdip, struct dentry *tdentry)
{
	cred_t *cr = CRED();
	int error;

	crhold(cr);
	error = -zfs_rename(sdip, dname(sdentry), tdip, dname(tdentry), cr, 0);
	crfree(cr);
	ASSERT3S(error, <=, 0);

	return (error);
}

static int
zpl_symlink(struct inode *dir, struct dentry *dentry, const char *name)
{
	cred_t *cr = CRED();
	vattr_t *vap;
	struct inode *ip;
	int error;

	crhold(cr);
	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
	vap->va_mode = S_IFLNK | S_IRWXUGO;
	vap->va_mask = ATTR_MODE;
	vap->va_uid = crgetfsuid(cr);
	vap->va_gid = crgetfsgid(cr);
	vap->va_dentry = dentry;

	error = -zfs_symlink(dir, dname(dentry), vap, (char *)name, &ip, cr, 0);
	kmem_free(vap, sizeof(vattr_t));
	crfree(cr);
	ASSERT3S(error, <=, 0);

	return (error);
}

static void *
zpl_follow_link(struct dentry *dentry, struct nameidata *nd)
{
	cred_t *cr = CRED();
	struct inode *ip = dentry->d_inode;
	struct iovec iov;
	uio_t uio;
	char *link;
	int error;

	crhold(cr);

	iov.iov_len = MAXPATHLEN;
	iov.iov_base = link = kmem_zalloc(MAXPATHLEN, KM_SLEEP);

	uio.uio_iov = &iov;
	uio.uio_iovcnt = 1;
	uio.uio_resid = (MAXPATHLEN - 1);
	uio.uio_segflg = UIO_SYSSPACE;

	error = -zfs_readlink(ip, &uio, cr);
	if (error) {
		kmem_free(link, MAXPATHLEN);
		nd_set_link(nd, ERR_PTR(error));
	} else {
		nd_set_link(nd, link);
	}

	crfree(cr);
	return (NULL);
}

static void
zpl_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr)
{
	char *link;

	link = nd_get_link(nd);
	if (!IS_ERR(link))
		kmem_free(link, MAXPATHLEN);
}

static int
zpl_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
{
	cred_t *cr = CRED();
	struct inode *ip = old_dentry->d_inode;
	int error;

	if (ip->i_nlink >= ZFS_LINK_MAX)
		return -EMLINK;

	crhold(cr);
	ip->i_ctime = CURRENT_TIME_SEC;
	igrab(ip); /* Use ihold() if available */

	error = -zfs_link(dir, ip, dname(dentry), cr);
	if (error) {
		iput(ip);
		goto out;
	}

	d_instantiate(dentry, ip);
out:
	crfree(cr);
	ASSERT3S(error, <=, 0);

	return (error);
}

const struct inode_operations zpl_inode_operations = {
	.create		= zpl_create,
	.link		= zpl_link,
	.unlink		= zpl_unlink,
	.symlink	= zpl_symlink,
	.mkdir		= zpl_mkdir,
	.rmdir		= zpl_rmdir,
	.mknod		= zpl_mknod,
	.rename		= zpl_rename,
	.setattr	= zpl_setattr,
	.getattr	= zpl_getattr,
	.setxattr	= generic_setxattr,
	.getxattr	= generic_getxattr,
	.removexattr	= generic_removexattr,
	.listxattr	= zpl_xattr_list,
};

const struct inode_operations zpl_dir_inode_operations = {
	.create		= zpl_create,
	.lookup		= zpl_lookup,
	.link		= zpl_link,
	.unlink		= zpl_unlink,
	.symlink	= zpl_symlink,
	.mkdir		= zpl_mkdir,
	.rmdir		= zpl_rmdir,
	.mknod		= zpl_mknod,
	.rename		= zpl_rename,
	.setattr	= zpl_setattr,
	.getattr	= zpl_getattr,
	.setxattr	= generic_setxattr,
	.getxattr	= generic_getxattr,
	.removexattr	= generic_removexattr,
	.listxattr	= zpl_xattr_list,
};

const struct inode_operations zpl_symlink_inode_operations = {
	.readlink	= generic_readlink,
	.follow_link	= zpl_follow_link,
	.put_link	= zpl_put_link,
};

const struct inode_operations zpl_special_inode_operations = {
	.setattr	= zpl_setattr,
	.getattr	= zpl_getattr,
	.setxattr	= generic_setxattr,
	.getxattr	= generic_getxattr,
	.removexattr	= generic_removexattr,
	.listxattr	= zpl_xattr_list,
};
Commit	Line	Data
ee154f01 BB	1	/*
	2	* CDDL HEADER START
	3	*
	4	* The contents of this file are subject to the terms of the
	5	* Common Development and Distribution License (the "License").
	6	* You may not use this file except in compliance with the License.
	7	*
	8	* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
	9	* or http://www.opensolaris.org/os/licensing.
	10	* See the License for the specific language governing permissions
	11	* and limitations under the License.
	12	*
	13	* When distributing Covered Code, include this CDDL HEADER in each
	14	* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
	15	* If applicable, add the following below this CDDL HEADER, with the
	16	* fields enclosed by brackets "[]" replaced with your own identifying
	17	* information: Portions Copyright [yyyy] [name of copyright owner]
	18	*
	19	* CDDL HEADER END
	20	*/
	21	/*
	22	* Copyright (c) 2011, Lawrence Livermore National Security, LLC.
	23	*/
	24
	25
	26	#include <sys/zfs_vfsops.h>
	27	#include <sys/zfs_vnops.h>
	28	#include <sys/vfs.h>
	29	#include <sys/zpl.h>
	30
	31
	32	static struct dentry *
	33	zpl_lookup(struct inode dir, struct dentry dentry, struct nameidata *nd)
	34	{
81e97e21	35	cred_t *cr = CRED();
ee154f01	36	struct inode *ip;
ee154f01 BB	37	int error;
ee154f01 BB	38
81e97e21	39	crhold(cr);
ee154f01 BB	40	error = -zfs_lookup(dir, dname(dentry), &ip, 0, cr, NULL, NULL);
ee154f01 BB	41	ASSERT3S(error, <=, 0);
81e97e21	42	crfree(cr);
ee154f01 BB	43
	44	if (error) {
	45	if (error == -ENOENT)
	46	return d_splice_alias(NULL, dentry);
	47	else
	48	return ERR_PTR(error);
	49	}
	50
	51	return d_splice_alias(ip, dentry);
	52	}
	53
	54	static int
	55	zpl_create(struct inode dir, struct dentry dentry, int mode,
	56	struct nameidata *nd)
	57	{
81e97e21	58	cred_t *cr = CRED();
ee154f01 BB	59	struct inode *ip;
	60	vattr_t *vap;
	61	int error;
	62
81e97e21	63	crhold(cr);
ee154f01 BB	64	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
	65	vap->va_mode = mode;
	66	vap->va_mask = ATTR_MODE;
81e97e21 BB	67	vap->va_uid = crgetfsuid(cr);
81e97e21 BB	68	vap->va_gid = crgetfsgid(cr);
c85b224f	69	vap->va_dentry = dentry;
ee154f01 BB	70
ee154f01 BB	71	error = -zfs_create(dir, (char *)dentry->d_name.name,
81e97e21	72	vap, 0, mode, &ip, cr, 0, NULL);
ee154f01	73	kmem_free(vap, sizeof(vattr_t));
81e97e21	74	crfree(cr);
ee154f01 BB	75	ASSERT3S(error, <=, 0);
	76
	77	return (error);
	78	}
	79
	80	static int
	81	zpl_mknod(struct inode dir, struct dentry dentry, int mode, dev_t rdev)
	82	{
81e97e21	83	cred_t *cr = CRED();
ee154f01 BB	84	struct inode *ip;
	85	vattr_t *vap;
	86	int error;
	87
aa6d8c10 NB	88	/*
	89	* We currently expect Linux to supply rdev=0 for all sockets
	90	* and fifos, but we want to know if this behavior ever changes.
	91	*/
	92	if (S_ISSOCK(mode) \|\| S_ISFIFO(mode))
	93	ASSERT(rdev == 0);
	94
81e97e21	95	crhold(cr);
ee154f01 BB	96	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
	97	vap->va_mode = mode;
	98	vap->va_mask = ATTR_MODE;
	99	vap->va_rdev = rdev;
81e97e21 BB	100	vap->va_uid = crgetfsuid(cr);
81e97e21 BB	101	vap->va_gid = crgetfsgid(cr);
c85b224f	102	vap->va_dentry = dentry;
ee154f01 BB	103
ee154f01 BB	104	error = -zfs_create(dir, (char *)dentry->d_name.name,
81e97e21	105	vap, 0, mode, &ip, cr, 0, NULL);
ee154f01	106	kmem_free(vap, sizeof(vattr_t));
81e97e21	107	crfree(cr);
ee154f01 BB	108	ASSERT3S(error, <=, 0);
	109
	110	return (-error);
	111	}
	112
	113	static int
	114	zpl_unlink(struct inode dir, struct dentry dentry)
	115	{
81e97e21	116	cred_t *cr = CRED();
ee154f01 BB	117	int error;
ee154f01 BB	118
81e97e21	119	crhold(cr);
ee154f01	120	error = -zfs_remove(dir, dname(dentry), cr);
81e97e21	121	crfree(cr);
ee154f01 BB	122	ASSERT3S(error, <=, 0);
	123
	124	return (error);
	125	}
	126
	127	static int
	128	zpl_mkdir(struct inode dir, struct dentry dentry, int mode)
	129	{
81e97e21	130	cred_t *cr = CRED();
ee154f01 BB	131	vattr_t *vap;
	132	struct inode *ip;
	133	int error;
	134
81e97e21	135	crhold(cr);
ee154f01 BB	136	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
	137	vap->va_mode = S_IFDIR \| mode;
	138	vap->va_mask = ATTR_MODE;
81e97e21 BB	139	vap->va_uid = crgetfsuid(cr);
81e97e21 BB	140	vap->va_gid = crgetfsgid(cr);
c85b224f	141	vap->va_dentry = dentry;
ee154f01 BB	142
ee154f01 BB	143	error = -zfs_mkdir(dir, dname(dentry), vap, &ip, cr, 0, NULL);
ee154f01	144	kmem_free(vap, sizeof(vattr_t));
81e97e21	145	crfree(cr);
ee154f01 BB	146	ASSERT3S(error, <=, 0);
	147
	148	return (error);
	149	}
	150
	151	static int
	152	zpl_rmdir(struct inode * dir, struct dentry *dentry)
	153	{
81e97e21	154	cred_t *cr = CRED();
ee154f01 BB	155	int error;
ee154f01 BB	156
81e97e21	157	crhold(cr);
ee154f01	158	error = -zfs_rmdir(dir, dname(dentry), NULL, cr, 0);
81e97e21	159	crfree(cr);
ee154f01 BB	160	ASSERT3S(error, <=, 0);
	161
	162	return (error);
	163	}
	164
	165	static int
	166	zpl_getattr(struct vfsmount mnt, struct dentry dentry, struct kstat *stat)
	167	{
81e97e21	168	cred_t *cr = CRED();
5484965a BB	169	vattr_t *vap;
5484965a BB	170	struct inode *ip;
ee154f01 BB	171	int error;
ee154f01 BB	172
5484965a	173	ip = dentry->d_inode;
81e97e21	174	crhold(cr);
5484965a BB	175	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
	176
	177	error = -zfs_getattr(ip, vap, 0, cr);
	178	if (error)
	179	goto out;
	180
	181	stat->ino = ip->i_ino;
53cf50e0	182	stat->dev = ip->i_sb->s_dev;
5484965a BB	183	stat->mode = vap->va_mode;
	184	stat->nlink = vap->va_nlink;
	185	stat->uid = vap->va_uid;
	186	stat->gid = vap->va_gid;
	187	stat->rdev = vap->va_rdev;
	188	stat->size = vap->va_size;
	189	stat->atime = vap->va_atime;
	190	stat->mtime = vap->va_mtime;
	191	stat->ctime = vap->va_ctime;
	192	stat->blksize = vap->va_blksize;
	193	stat->blocks = vap->va_nblocks;
	194	out:
	195	kmem_free(vap, sizeof(vattr_t));
81e97e21	196	crfree(cr);
ee154f01 BB	197	ASSERT3S(error, <=, 0);
	198
	199	return (error);
	200	}
	201
	202	static int
5484965a	203	zpl_setattr(struct dentry dentry, struct iattr ia)
ee154f01	204	{
81e97e21	205	cred_t *cr = CRED();
5484965a	206	vattr_t *vap;
ee154f01 BB	207	int error;
ee154f01 BB	208
5484965a	209	error = inode_change_ok(dentry->d_inode, ia);
ee154f01 BB	210	if (error)
	211	return (error);
	212
81e97e21	213	crhold(cr);
5484965a BB	214	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
	215	vap->va_mask = ia->ia_valid & ATTR_IATTR_MASK;
	216	vap->va_mode = ia->ia_mode;
	217	vap->va_uid = ia->ia_uid;
	218	vap->va_gid = ia->ia_gid;
	219	vap->va_size = ia->ia_size;
	220	vap->va_atime = ia->ia_atime;
	221	vap->va_mtime = ia->ia_mtime;
	222	vap->va_ctime = ia->ia_ctime;
	223
	224	error = -zfs_setattr(dentry->d_inode, vap, 0, cr);
	225
	226	kmem_free(vap, sizeof(vattr_t));
81e97e21	227	crfree(cr);
ee154f01 BB	228	ASSERT3S(error, <=, 0);
ee154f01 BB	229
5484965a	230	return (error);
ee154f01 BB	231	}
	232
	233	static int
	234	zpl_rename(struct inode sdip, struct dentry sdentry,
	235	struct inode tdip, struct dentry tdentry)
	236	{
81e97e21	237	cred_t *cr = CRED();
ee154f01 BB	238	int error;
ee154f01 BB	239
81e97e21	240	crhold(cr);
ee154f01	241	error = -zfs_rename(sdip, dname(sdentry), tdip, dname(tdentry), cr, 0);
81e97e21	242	crfree(cr);
ee154f01 BB	243	ASSERT3S(error, <=, 0);
	244
	245	return (error);
	246	}
	247
	248	static int
	249	zpl_symlink(struct inode dir, struct dentry dentry, const char *name)
	250	{
81e97e21	251	cred_t *cr = CRED();
ee154f01 BB	252	vattr_t *vap;
	253	struct inode *ip;
	254	int error;
	255
81e97e21	256	crhold(cr);
ee154f01 BB	257	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
	258	vap->va_mode = S_IFLNK \| S_IRWXUGO;
	259	vap->va_mask = ATTR_MODE;
81e97e21 BB	260	vap->va_uid = crgetfsuid(cr);
81e97e21 BB	261	vap->va_gid = crgetfsgid(cr);
c85b224f	262	vap->va_dentry = dentry;
ee154f01 BB	263
ee154f01 BB	264	error = -zfs_symlink(dir, dname(dentry), vap, (char *)name, &ip, cr, 0);
ee154f01	265	kmem_free(vap, sizeof(vattr_t));
81e97e21	266	crfree(cr);
ee154f01 BB	267	ASSERT3S(error, <=, 0);
	268
	269	return (error);
	270	}
	271
	272	static void *
	273	zpl_follow_link(struct dentry dentry, struct nameidata nd)
	274	{
81e97e21	275	cred_t *cr = CRED();
8b4f9a2d BB	276	struct inode *ip = dentry->d_inode;
	277	struct iovec iov;
	278	uio_t uio;
	279	char *link;
8b4f9a2d BB	280	int error;
8b4f9a2d BB	281
81e97e21	282	crhold(cr);
8b4f9a2d BB	283
	284	iov.iov_len = MAXPATHLEN;
	285	iov.iov_base = link = kmem_zalloc(MAXPATHLEN, KM_SLEEP);
	286
	287	uio.uio_iov = &iov;
	288	uio.uio_iovcnt = 1;
	289	uio.uio_resid = (MAXPATHLEN - 1);
	290	uio.uio_segflg = UIO_SYSSPACE;
	291
50950001	292	error = -zfs_readlink(ip, &uio, cr);
8b4f9a2d BB	293	if (error) {
	294	kmem_free(link, MAXPATHLEN);
	295	nd_set_link(nd, ERR_PTR(error));
	296	} else {
	297	nd_set_link(nd, link);
	298	}
	299
81e97e21	300	crfree(cr);
8b4f9a2d	301	return (NULL);
ee154f01 BB	302	}
	303
	304	static void
	305	zpl_put_link(struct dentry dentry, struct nameidata nd, void *ptr)
	306	{
	307	char *link;
	308
	309	link = nd_get_link(nd);
	310	if (!IS_ERR(link))
8b4f9a2d	311	kmem_free(link, MAXPATHLEN);
ee154f01 BB	312	}
	313
	314	static int
	315	zpl_link(struct dentry old_dentry, struct inode dir, struct dentry *dentry)
	316	{
81e97e21	317	cred_t *cr = CRED();
ee154f01	318	struct inode *ip = old_dentry->d_inode;
ee154f01 BB	319	int error;
	320
	321	if (ip->i_nlink >= ZFS_LINK_MAX)
	322	return -EMLINK;
	323
81e97e21	324	crhold(cr);
ee154f01 BB	325	ip->i_ctime = CURRENT_TIME_SEC;
	326	igrab(ip); /* Use ihold() if available */
	327
	328	error = -zfs_link(dir, ip, dname(dentry), cr);
	329	if (error) {
	330	iput(ip);
	331	goto out;
	332	}
	333
	334	d_instantiate(dentry, ip);
	335	out:
81e97e21	336	crfree(cr);
ee154f01 BB	337	ASSERT3S(error, <=, 0);
	338
	339	return (error);
	340	}
	341
	342	const struct inode_operations zpl_inode_operations = {
ee154f01 BB	343	.create = zpl_create,
	344	.link = zpl_link,
	345	.unlink = zpl_unlink,
	346	.symlink = zpl_symlink,
	347	.mkdir = zpl_mkdir,
	348	.rmdir = zpl_rmdir,
	349	.mknod = zpl_mknod,
	350	.rename = zpl_rename,
	351	.setattr = zpl_setattr,
	352	.getattr = zpl_getattr,
	353	.setxattr = generic_setxattr,
	354	.getxattr = generic_getxattr,
	355	.removexattr = generic_removexattr,
	356	.listxattr = zpl_xattr_list,
	357	};
	358
	359	const struct inode_operations zpl_dir_inode_operations = {
ee154f01 BB	360	.create = zpl_create,
	361	.lookup = zpl_lookup,
	362	.link = zpl_link,
	363	.unlink = zpl_unlink,
	364	.symlink = zpl_symlink,
	365	.mkdir = zpl_mkdir,
	366	.rmdir = zpl_rmdir,
	367	.mknod = zpl_mknod,
	368	.rename = zpl_rename,
	369	.setattr = zpl_setattr,
a6695d83 BB	370	.getattr = zpl_getattr,
	371	.setxattr = generic_setxattr,
	372	.getxattr = generic_getxattr,
	373	.removexattr = generic_removexattr,
	374	.listxattr = zpl_xattr_list,
ee154f01 BB	375	};
	376
	377	const struct inode_operations zpl_symlink_inode_operations = {
ee154f01 BB	378	.readlink = generic_readlink,
	379	.follow_link = zpl_follow_link,
	380	.put_link = zpl_put_link,
	381	};
	382
	383	const struct inode_operations zpl_special_inode_operations = {
a6695d83 BB	384	.setattr = zpl_setattr,
	385	.getattr = zpl_getattr,
	386	.setxattr = generic_setxattr,
	387	.getxattr = generic_getxattr,
	388	.removexattr = generic_removexattr,
	389	.listxattr = zpl_xattr_list,
ee154f01	390	};