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/*
* 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)
{
struct inode *ip;
cred_t *cr;
int error;
cr = (cred_t *)get_current_cred();
error = -zfs_lookup(dir, dname(dentry), &ip, 0, cr, NULL, NULL);
ASSERT3S(error, <=, 0);
put_cred(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)
{
const struct cred *cred;
struct inode *ip;
vattr_t *vap;
int error;
cred = get_current_cred();
vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
vap->va_mode = mode;
vap->va_mask = ATTR_MODE;
vap->va_uid = current_fsuid();
vap->va_gid = current_fsgid();
error = -zfs_create(dir, (char *)dentry->d_name.name,
vap, 0, mode, &ip, (struct cred *)cred, 0, NULL);
if (error)
goto out;
d_instantiate(dentry, ip);
out:
kmem_free(vap, sizeof(vattr_t));
put_cred(cred);
ASSERT3S(error, <=, 0);
return (error);
}
static int
zpl_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
{
const struct cred *cred;
struct inode *ip;
vattr_t *vap;
int error;
cred = get_current_cred();
vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
vap->va_mode = mode;
vap->va_mask = ATTR_MODE;
vap->va_rdev = rdev;
vap->va_uid = current_fsuid();
vap->va_gid = current_fsgid();
error = -zfs_create(dir, (char *)dentry->d_name.name,
vap, 0, mode, &ip, (struct cred *)cred, 0, NULL);
if (error)
goto out;
d_instantiate(dentry, ip);
out:
kmem_free(vap, sizeof(vattr_t));
put_cred(cred);
ASSERT3S(error, <=, 0);
return (-error);
}
static int
zpl_unlink(struct inode *dir, struct dentry *dentry)
{
cred_t *cr;
int error;
cr = (cred_t *)get_current_cred();
error = -zfs_remove(dir, dname(dentry), cr);
put_cred(cr);
ASSERT3S(error, <=, 0);
return (error);
}
static int
zpl_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
cred_t *cr;
vattr_t *vap;
struct inode *ip;
int error;
cr = (cred_t *)get_current_cred();
vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
vap->va_mode = S_IFDIR | mode;
vap->va_mask = ATTR_MODE;
vap->va_uid = current_fsuid();
vap->va_gid = current_fsgid();
error = -zfs_mkdir(dir, dname(dentry), vap, &ip, cr, 0, NULL);
if (error)
goto out;
d_instantiate(dentry, ip);
out:
kmem_free(vap, sizeof(vattr_t));
put_cred(cr);
ASSERT3S(error, <=, 0);
return (error);
}
static int
zpl_rmdir(struct inode * dir, struct dentry *dentry)
{
cred_t *cr;
int error;
cr = (cred_t *)get_current_cred();
error = -zfs_rmdir(dir, dname(dentry), NULL, cr, 0);
put_cred(cr);
ASSERT3S(error, <=, 0);
return (error);
}
static int
zpl_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
{
cred_t *cr;
vattr_t *vap;
struct inode *ip;
int error;
ip = dentry->d_inode;
cr = (cred_t *)get_current_cred();
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));
put_cred(cr);
ASSERT3S(error, <=, 0);
return (error);
}
static int
zpl_setattr(struct dentry *dentry, struct iattr *ia)
{
cred_t *cr;
vattr_t *vap;
int error;
error = inode_change_ok(dentry->d_inode, ia);
if (error)
return (error);
cr = (cred_t *)get_current_cred();
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));
put_cred(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;
int error;
cr = (cred_t *)get_current_cred();
error = -zfs_rename(sdip, dname(sdentry), tdip, dname(tdentry), cr, 0);
put_cred(cr);
ASSERT3S(error, <=, 0);
return (error);
}
static int
zpl_symlink(struct inode *dir, struct dentry *dentry, const char *name)
{
cred_t *cr;
vattr_t *vap;
struct inode *ip;
int error;
cr = (cred_t *)get_current_cred();
vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
vap->va_mode = S_IFLNK | S_IRWXUGO;
vap->va_mask = ATTR_MODE;
vap->va_uid = current_fsuid();
vap->va_gid = current_fsgid();
error = -zfs_symlink(dir, dname(dentry), vap, (char *)name, &ip, cr, 0);
if (error)
goto out;
d_instantiate(dentry, ip);
out:
kmem_free(vap, sizeof(vattr_t));
put_cred(cr);
ASSERT3S(error, <=, 0);
return (error);
}
static void *
zpl_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct inode *ip = dentry->d_inode;
struct iovec iov;
uio_t uio;
char *link;
cred_t *cr;
int error;
cr = (cred_t *)get_current_cred();
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);
}
put_cred(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)
{
struct inode *ip = old_dentry->d_inode;
cred_t *cr;
int error;
if (ip->i_nlink >= ZFS_LINK_MAX)
return -EMLINK;
cr = (cred_t *)get_current_cred();
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:
put_cred(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,
};
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