[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/zfs_znode.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);
}

void
zpl_vap_init(vattr_t *vap, struct inode *dir, struct dentry *dentry,
    mode_t mode, cred_t *cr)
{
	vap->va_mask = ATTR_MODE;
	vap->va_mode = mode;
	vap->va_dentry = dentry;
	vap->va_uid = crgetfsuid(cr);

	if (dir && dir->i_mode & S_ISGID) {
		vap->va_gid = dir->i_gid;
		if (S_ISDIR(mode))
			vap->va_mode |= S_ISGID;
	} else {
		vap->va_gid = crgetfsgid(cr);
	}
}

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);
	zpl_vap_init(vap, dir, dentry, mode, cr);

	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);
	zpl_vap_init(vap, dir, dentry, mode, cr);
	vap->va_rdev = rdev;

	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);
	zpl_vap_init(vap, dir, dentry, mode | S_IFDIR, cr);

	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)
{
	boolean_t issnap = ITOZSB(dentry->d_inode)->z_issnap;
	int error;

	/*
	 * Ensure MNT_SHRINKABLE is set on snapshots to ensure they are
	 * unmounted automatically with the parent file system.  This
	 * is done on the first getattr because it's not easy to get the
	 * vfsmount structure at mount time.  This call path is explicitly
	 * marked unlikely to avoid any performance impact.  FWIW, ext4
	 * resorts to a similar trick for sysadmin convenience.
	 */
	if (unlikely(issnap && !(mnt->mnt_flags & MNT_SHRINKABLE)))
		mnt->mnt_flags |= MNT_SHRINKABLE;

	error = -zfs_getattr_fast(dentry->d_inode, stat);
	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);
	zpl_vap_init(vap, dir, dentry, S_IFLNK | S_IRWXUGO, cr);

	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);
}

static void
zpl_truncate_range(struct inode* ip, loff_t start, loff_t end)
{
	cred_t *cr = CRED();
	flock64_t bf;

	ASSERT3S(start, <=, end);

	/*
	 * zfs_freesp() will interpret (len == 0) as meaning "truncate until
	 * the end of the file". We don't want that.
	 */
	if (start == end)
		return;

	crhold(cr);

	bf.l_type = F_WRLCK;
	bf.l_whence = 0;
	bf.l_start = start;
	bf.l_len = end - start;
	bf.l_pid = 0;
	zfs_space(ip, F_FREESP, &bf, FWRITE, start, cr);

	crfree(cr);
}

#ifdef HAVE_INODE_FALLOCATE
static long
zpl_fallocate(struct inode *ip, int mode, loff_t offset, loff_t len)
{
	return zpl_fallocate_common(ip, mode, offset, len);
}
#endif /* HAVE_INODE_FALLOCATE */


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,
	.truncate_range = zpl_truncate_range,
#ifdef HAVE_INODE_FALLOCATE
	.fallocate	= zpl_fallocate,
#endif /* HAVE_INODE_FALLOCATE */
};

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,
	.setattr	= zpl_setattr,
	.getattr	= zpl_getattr,
	.setxattr	= generic_setxattr,
	.getxattr	= generic_getxattr,
	.removexattr	= generic_removexattr,
	.listxattr	= zpl_xattr_list,
};

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>
ebe7e575	28	#include <sys/zfs_znode.h>
ee154f01 BB	29	#include <sys/vfs.h>
	30	#include <sys/zpl.h>
	31
	32
	33	static struct dentry *
	34	zpl_lookup(struct inode dir, struct dentry dentry, struct nameidata *nd)
	35	{
81e97e21	36	cred_t *cr = CRED();
ee154f01	37	struct inode *ip;
ee154f01 BB	38	int error;
ee154f01 BB	39
81e97e21	40	crhold(cr);
ee154f01 BB	41	error = -zfs_lookup(dir, dname(dentry), &ip, 0, cr, NULL, NULL);
ee154f01 BB	42	ASSERT3S(error, <=, 0);
81e97e21	43	crfree(cr);
ee154f01 BB	44
	45	if (error) {
	46	if (error == -ENOENT)
	47	return d_splice_alias(NULL, dentry);
	48	else
	49	return ERR_PTR(error);
	50	}
	51
	52	return d_splice_alias(ip, dentry);
	53	}
	54
ebe7e575	55	void
9fd91dae BB	56	zpl_vap_init(vattr_t vap, struct inode dir, struct dentry *dentry,
	57	mode_t mode, cred_t *cr)
	58	{
	59	vap->va_mask = ATTR_MODE;
	60	vap->va_mode = mode;
	61	vap->va_dentry = dentry;
	62	vap->va_uid = crgetfsuid(cr);
	63
	64	if (dir && dir->i_mode & S_ISGID) {
	65	vap->va_gid = dir->i_gid;
	66	if (S_ISDIR(mode))
	67	vap->va_mode \|= S_ISGID;
	68	} else {
	69	vap->va_gid = crgetfsgid(cr);
	70	}
	71	}
	72
ee154f01 BB	73	static int
	74	zpl_create(struct inode dir, struct dentry dentry, int mode,
	75	struct nameidata *nd)
	76	{
81e97e21	77	cred_t *cr = CRED();
ee154f01 BB	78	struct inode *ip;
	79	vattr_t *vap;
	80	int error;
	81
81e97e21	82	crhold(cr);
ee154f01	83	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
9fd91dae	84	zpl_vap_init(vap, dir, dentry, mode, cr);
ee154f01 BB	85
ee154f01 BB	86	error = -zfs_create(dir, (char *)dentry->d_name.name,
81e97e21	87	vap, 0, mode, &ip, cr, 0, NULL);
ee154f01	88	kmem_free(vap, sizeof(vattr_t));
81e97e21	89	crfree(cr);
ee154f01 BB	90	ASSERT3S(error, <=, 0);
	91
	92	return (error);
	93	}
	94
	95	static int
	96	zpl_mknod(struct inode dir, struct dentry dentry, int mode, dev_t rdev)
	97	{
81e97e21	98	cred_t *cr = CRED();
ee154f01 BB	99	struct inode *ip;
	100	vattr_t *vap;
	101	int error;
	102
aa6d8c10 NB	103	/*
	104	* We currently expect Linux to supply rdev=0 for all sockets
	105	* and fifos, but we want to know if this behavior ever changes.
	106	*/
	107	if (S_ISSOCK(mode) \|\| S_ISFIFO(mode))
	108	ASSERT(rdev == 0);
	109
81e97e21	110	crhold(cr);
ee154f01	111	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
9fd91dae	112	zpl_vap_init(vap, dir, dentry, mode, cr);
ee154f01	113	vap->va_rdev = rdev;
ee154f01 BB	114
ee154f01 BB	115	error = -zfs_create(dir, (char *)dentry->d_name.name,
81e97e21	116	vap, 0, mode, &ip, cr, 0, NULL);
ee154f01	117	kmem_free(vap, sizeof(vattr_t));
81e97e21	118	crfree(cr);
ee154f01 BB	119	ASSERT3S(error, <=, 0);
	120
	121	return (-error);
	122	}
	123
	124	static int
	125	zpl_unlink(struct inode dir, struct dentry dentry)
	126	{
81e97e21	127	cred_t *cr = CRED();
ee154f01 BB	128	int error;
ee154f01 BB	129
81e97e21	130	crhold(cr);
ee154f01	131	error = -zfs_remove(dir, dname(dentry), cr);
81e97e21	132	crfree(cr);
ee154f01 BB	133	ASSERT3S(error, <=, 0);
	134
	135	return (error);
	136	}
	137
	138	static int
	139	zpl_mkdir(struct inode dir, struct dentry dentry, int mode)
	140	{
81e97e21	141	cred_t *cr = CRED();
ee154f01 BB	142	vattr_t *vap;
	143	struct inode *ip;
	144	int error;
	145
81e97e21	146	crhold(cr);
ee154f01	147	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
9fd91dae	148	zpl_vap_init(vap, dir, dentry, mode \| S_IFDIR, cr);
ee154f01 BB	149
ee154f01 BB	150	error = -zfs_mkdir(dir, dname(dentry), vap, &ip, cr, 0, NULL);
ee154f01	151	kmem_free(vap, sizeof(vattr_t));
81e97e21	152	crfree(cr);
ee154f01 BB	153	ASSERT3S(error, <=, 0);
	154
	155	return (error);
	156	}
	157
	158	static int
	159	zpl_rmdir(struct inode * dir, struct dentry *dentry)
	160	{
81e97e21	161	cred_t *cr = CRED();
ee154f01 BB	162	int error;
ee154f01 BB	163
81e97e21	164	crhold(cr);
ee154f01	165	error = -zfs_rmdir(dir, dname(dentry), NULL, cr, 0);
81e97e21	166	crfree(cr);
ee154f01 BB	167	ASSERT3S(error, <=, 0);
	168
	169	return (error);
	170	}
	171
	172	static int
	173	zpl_getattr(struct vfsmount mnt, struct dentry dentry, struct kstat *stat)
	174	{
ebe7e575	175	boolean_t issnap = ITOZSB(dentry->d_inode)->z_issnap;
ee154f01 BB	176	int error;
ee154f01 BB	177
ebe7e575 BB	178	/*
	179	* Ensure MNT_SHRINKABLE is set on snapshots to ensure they are
	180	* unmounted automatically with the parent file system. This
	181	* is done on the first getattr because it's not easy to get the
	182	* vfsmount structure at mount time. This call path is explicitly
	183	* marked unlikely to avoid any performance impact. FWIW, ext4
	184	* resorts to a similar trick for sysadmin convenience.
	185	*/
	186	if (unlikely(issnap && !(mnt->mnt_flags & MNT_SHRINKABLE)))
	187	mnt->mnt_flags \|= MNT_SHRINKABLE;
	188
057e8eee	189	error = -zfs_getattr_fast(dentry->d_inode, stat);
ee154f01 BB	190	ASSERT3S(error, <=, 0);
	191
	192	return (error);
	193	}
	194
	195	static int
5484965a	196	zpl_setattr(struct dentry dentry, struct iattr ia)
ee154f01	197	{
81e97e21	198	cred_t *cr = CRED();
5484965a	199	vattr_t *vap;
ee154f01 BB	200	int error;
ee154f01 BB	201
5484965a	202	error = inode_change_ok(dentry->d_inode, ia);
ee154f01 BB	203	if (error)
	204	return (error);
	205
81e97e21	206	crhold(cr);
5484965a BB	207	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
	208	vap->va_mask = ia->ia_valid & ATTR_IATTR_MASK;
	209	vap->va_mode = ia->ia_mode;
	210	vap->va_uid = ia->ia_uid;
	211	vap->va_gid = ia->ia_gid;
	212	vap->va_size = ia->ia_size;
	213	vap->va_atime = ia->ia_atime;
	214	vap->va_mtime = ia->ia_mtime;
	215	vap->va_ctime = ia->ia_ctime;
	216
	217	error = -zfs_setattr(dentry->d_inode, vap, 0, cr);
	218
	219	kmem_free(vap, sizeof(vattr_t));
81e97e21	220	crfree(cr);
ee154f01 BB	221	ASSERT3S(error, <=, 0);
ee154f01 BB	222
5484965a	223	return (error);
ee154f01 BB	224	}
	225
	226	static int
	227	zpl_rename(struct inode sdip, struct dentry sdentry,
	228	struct inode tdip, struct dentry tdentry)
	229	{
81e97e21	230	cred_t *cr = CRED();
ee154f01 BB	231	int error;
ee154f01 BB	232
81e97e21	233	crhold(cr);
ee154f01	234	error = -zfs_rename(sdip, dname(sdentry), tdip, dname(tdentry), cr, 0);
81e97e21	235	crfree(cr);
ee154f01 BB	236	ASSERT3S(error, <=, 0);
	237
	238	return (error);
	239	}
	240
	241	static int
	242	zpl_symlink(struct inode dir, struct dentry dentry, const char *name)
	243	{
81e97e21	244	cred_t *cr = CRED();
ee154f01 BB	245	vattr_t *vap;
	246	struct inode *ip;
	247	int error;
	248
81e97e21	249	crhold(cr);
ee154f01	250	vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
9fd91dae	251	zpl_vap_init(vap, dir, dentry, S_IFLNK \| S_IRWXUGO, cr);
ee154f01 BB	252
ee154f01 BB	253	error = -zfs_symlink(dir, dname(dentry), vap, (char *)name, &ip, cr, 0);
ee154f01	254	kmem_free(vap, sizeof(vattr_t));
81e97e21	255	crfree(cr);
ee154f01 BB	256	ASSERT3S(error, <=, 0);
	257
	258	return (error);
	259	}
	260
	261	static void *
	262	zpl_follow_link(struct dentry dentry, struct nameidata nd)
	263	{
81e97e21	264	cred_t *cr = CRED();
8b4f9a2d BB	265	struct inode *ip = dentry->d_inode;
	266	struct iovec iov;
	267	uio_t uio;
	268	char *link;
8b4f9a2d BB	269	int error;
8b4f9a2d BB	270
81e97e21	271	crhold(cr);
8b4f9a2d BB	272
	273	iov.iov_len = MAXPATHLEN;
	274	iov.iov_base = link = kmem_zalloc(MAXPATHLEN, KM_SLEEP);
	275
	276	uio.uio_iov = &iov;
	277	uio.uio_iovcnt = 1;
	278	uio.uio_resid = (MAXPATHLEN - 1);
	279	uio.uio_segflg = UIO_SYSSPACE;
	280
50950001	281	error = -zfs_readlink(ip, &uio, cr);
8b4f9a2d BB	282	if (error) {
	283	kmem_free(link, MAXPATHLEN);
	284	nd_set_link(nd, ERR_PTR(error));
	285	} else {
	286	nd_set_link(nd, link);
	287	}
	288
81e97e21	289	crfree(cr);
8b4f9a2d	290	return (NULL);
ee154f01 BB	291	}
	292
	293	static void
	294	zpl_put_link(struct dentry dentry, struct nameidata nd, void *ptr)
	295	{
	296	char *link;
	297
	298	link = nd_get_link(nd);
	299	if (!IS_ERR(link))
8b4f9a2d	300	kmem_free(link, MAXPATHLEN);
ee154f01 BB	301	}
	302
	303	static int
	304	zpl_link(struct dentry old_dentry, struct inode dir, struct dentry *dentry)
	305	{
81e97e21	306	cred_t *cr = CRED();
ee154f01	307	struct inode *ip = old_dentry->d_inode;
ee154f01 BB	308	int error;
	309
	310	if (ip->i_nlink >= ZFS_LINK_MAX)
	311	return -EMLINK;
	312
81e97e21	313	crhold(cr);
ee154f01 BB	314	ip->i_ctime = CURRENT_TIME_SEC;
	315	igrab(ip); /* Use ihold() if available */
	316
	317	error = -zfs_link(dir, ip, dname(dentry), cr);
	318	if (error) {
	319	iput(ip);
	320	goto out;
	321	}
	322
	323	d_instantiate(dentry, ip);
	324	out:
81e97e21	325	crfree(cr);
ee154f01 BB	326	ASSERT3S(error, <=, 0);
	327
	328	return (error);
	329	}
	330
5cb63a57 ED	331	static void
	332	zpl_truncate_range(struct inode* ip, loff_t start, loff_t end)
	333	{
	334	cred_t *cr = CRED();
	335	flock64_t bf;
	336
	337	ASSERT3S(start, <=, end);
	338
	339	/*
	340	* zfs_freesp() will interpret (len == 0) as meaning "truncate until
	341	* the end of the file". We don't want that.
	342	*/
	343	if (start == end)
	344	return;
	345
	346	crhold(cr);
	347
	348	bf.l_type = F_WRLCK;
	349	bf.l_whence = 0;
	350	bf.l_start = start;
	351	bf.l_len = end - start;
	352	bf.l_pid = 0;
	353	zfs_space(ip, F_FREESP, &bf, FWRITE, start, cr);
	354
	355	crfree(cr);
	356	}
	357
cb2d1901 ED	358	#ifdef HAVE_INODE_FALLOCATE
	359	static long
	360	zpl_fallocate(struct inode *ip, int mode, loff_t offset, loff_t len)
	361	{
	362	return zpl_fallocate_common(ip, mode, offset, len);
	363	}
	364	#endif /* HAVE_INODE_FALLOCATE */
	365
	366
ee154f01	367	const struct inode_operations zpl_inode_operations = {
ee154f01 BB	368	.create = zpl_create,
	369	.link = zpl_link,
	370	.unlink = zpl_unlink,
	371	.symlink = zpl_symlink,
	372	.mkdir = zpl_mkdir,
	373	.rmdir = zpl_rmdir,
	374	.mknod = zpl_mknod,
	375	.rename = zpl_rename,
	376	.setattr = zpl_setattr,
	377	.getattr = zpl_getattr,
	378	.setxattr = generic_setxattr,
	379	.getxattr = generic_getxattr,
	380	.removexattr = generic_removexattr,
	381	.listxattr = zpl_xattr_list,
5cb63a57	382	.truncate_range = zpl_truncate_range,
cb2d1901 ED	383	#ifdef HAVE_INODE_FALLOCATE
	384	.fallocate = zpl_fallocate,
	385	#endif /* HAVE_INODE_FALLOCATE */
ee154f01 BB	386	};
	387
	388	const struct inode_operations zpl_dir_inode_operations = {
ee154f01 BB	389	.create = zpl_create,
	390	.lookup = zpl_lookup,
	391	.link = zpl_link,
	392	.unlink = zpl_unlink,
	393	.symlink = zpl_symlink,
	394	.mkdir = zpl_mkdir,
	395	.rmdir = zpl_rmdir,
	396	.mknod = zpl_mknod,
	397	.rename = zpl_rename,
	398	.setattr = zpl_setattr,
a6695d83 BB	399	.getattr = zpl_getattr,
	400	.setxattr = generic_setxattr,
	401	.getxattr = generic_getxattr,
	402	.removexattr = generic_removexattr,
	403	.listxattr = zpl_xattr_list,
ee154f01 BB	404	};
	405
	406	const struct inode_operations zpl_symlink_inode_operations = {
ee154f01 BB	407	.readlink = generic_readlink,
	408	.follow_link = zpl_follow_link,
	409	.put_link = zpl_put_link,
6f2255ba BB	410	.setattr = zpl_setattr,
6f2255ba BB	411	.getattr = zpl_getattr,
f31b3ebe BB	412	.setxattr = generic_setxattr,
	413	.getxattr = generic_getxattr,
	414	.removexattr = generic_removexattr,
	415	.listxattr = zpl_xattr_list,
ee154f01 BB	416	};
	417
	418	const struct inode_operations zpl_special_inode_operations = {
a6695d83 BB	419	.setattr = zpl_setattr,
	420	.getattr = zpl_getattr,
	421	.setxattr = generic_setxattr,
	422	.getxattr = generic_getxattr,
	423	.removexattr = generic_removexattr,
	424	.listxattr = zpl_xattr_list,
ee154f01	425	};