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Add Hooks for Linux Inode Operations
The Linux specific inode operations have all been located in the file zpl_inode.c. These functions primarily rely on the reworked zfs_* functions to do their job. They are also responsible for converting the possible Solaris style error codes to negative Linux errors.
This commit is contained in:
Brian Behlendorf
parent
1efb473f89
commit
ee154f01bf
331
module/zfs/zpl_inode.c
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331
module/zfs/zpl_inode.c
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@ -0,0 +1,331 @@
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2011, Lawrence Livermore National Security, LLC.
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*/
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#include <sys/zfs_vfsops.h>
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#include <sys/zfs_vnops.h>
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#include <sys/vfs.h>
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#include <sys/zpl.h>
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static struct dentry *
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zpl_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
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{
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struct inode *ip;
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cred_t *cr;
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int error;
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cr = (cred_t *)get_current_cred();
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error = -zfs_lookup(dir, dname(dentry), &ip, 0, cr, NULL, NULL);
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ASSERT3S(error, <=, 0);
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put_cred(cr);
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if (error) {
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if (error == -ENOENT)
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return d_splice_alias(NULL, dentry);
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else
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return ERR_PTR(error);
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}
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return d_splice_alias(ip, dentry);
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}
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static int
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zpl_create(struct inode *dir, struct dentry *dentry, int mode,
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struct nameidata *nd)
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{
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const struct cred *cred;
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struct inode *ip;
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vattr_t *vap;
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int error;
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cred = get_current_cred();
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vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
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vap->va_mode = mode;
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vap->va_mask = ATTR_MODE;
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vap->va_uid = current_fsuid();
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vap->va_gid = current_fsgid();
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error = -zfs_create(dir, (char *)dentry->d_name.name,
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vap, 0, mode, &ip, (struct cred *)cred, 0, NULL);
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if (error)
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goto out;
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d_instantiate(dentry, ip);
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out:
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kmem_free(vap, sizeof(vattr_t));
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put_cred(cred);
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ASSERT3S(error, <=, 0);
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return (error);
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}
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static int
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zpl_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
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{
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const struct cred *cred;
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struct inode *ip;
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vattr_t *vap;
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int error;
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cred = get_current_cred();
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vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
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vap->va_mode = mode;
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vap->va_mask = ATTR_MODE;
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vap->va_rdev = rdev;
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vap->va_uid = current_fsuid();
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vap->va_gid = current_fsgid();
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error = -zfs_create(dir, (char *)dentry->d_name.name,
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vap, 0, mode, &ip, (struct cred *)cred, 0, NULL);
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if (error)
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goto out;
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d_instantiate(dentry, ip);
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out:
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kmem_free(vap, sizeof(vattr_t));
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put_cred(cred);
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ASSERT3S(error, <=, 0);
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return (-error);
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}
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static int
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zpl_unlink(struct inode *dir, struct dentry *dentry)
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{
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cred_t *cr;
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int error;
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cr = (cred_t *)get_current_cred();
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error = -zfs_remove(dir, dname(dentry), cr);
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put_cred(cr);
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ASSERT3S(error, <=, 0);
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return (error);
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}
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static int
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zpl_mkdir(struct inode *dir, struct dentry *dentry, int mode)
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{
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cred_t *cr;
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vattr_t *vap;
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struct inode *ip;
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int error;
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cr = (cred_t *)get_current_cred();
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vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
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vap->va_mode = S_IFDIR | mode;
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vap->va_mask = ATTR_MODE;
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vap->va_uid = current_fsuid();
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vap->va_gid = current_fsgid();
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error = -zfs_mkdir(dir, dname(dentry), vap, &ip, cr, 0, NULL);
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if (error)
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goto out;
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d_instantiate(dentry, ip);
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out:
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kmem_free(vap, sizeof(vattr_t));
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put_cred(cr);
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ASSERT3S(error, <=, 0);
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return (error);
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}
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static int
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zpl_rmdir(struct inode * dir, struct dentry *dentry)
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{
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cred_t *cr;
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int error;
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cr = (cred_t *)get_current_cred();
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error = -zfs_rmdir(dir, dname(dentry), NULL, cr, 0);
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put_cred(cr);
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ASSERT3S(error, <=, 0);
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return (error);
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}
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static int
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zpl_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
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{
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cred_t *cr;
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int error;
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cr = (cred_t *)get_current_cred();
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error = -zfs_getattr(dentry->d_inode, stat, 0, cr);
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put_cred(cr);
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ASSERT3S(error, <=, 0);
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return (error);
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}
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static int
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zpl_setattr(struct dentry *dentry, struct iattr *attr)
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{
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cred_t *cr;
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int error;
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error = inode_change_ok(dentry->d_inode, attr);
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if (error)
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return (error);
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cr = (cred_t *)get_current_cred();
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error = -zfs_setattr(dentry->d_inode, attr, 0, cr);
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put_cred(cr);
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ASSERT3S(error, <=, 0);
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return (-error);
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}
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static int
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zpl_rename(struct inode *sdip, struct dentry *sdentry,
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struct inode *tdip, struct dentry *tdentry)
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{
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cred_t *cr;
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int error;
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cr = (cred_t *)get_current_cred();
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error = -zfs_rename(sdip, dname(sdentry), tdip, dname(tdentry), cr, 0);
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put_cred(cr);
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ASSERT3S(error, <=, 0);
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return (error);
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}
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static int
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zpl_symlink(struct inode *dir, struct dentry *dentry, const char *name)
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{
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cred_t *cr;
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vattr_t *vap;
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struct inode *ip;
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int error;
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cr = (cred_t *)get_current_cred();
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vap = kmem_zalloc(sizeof(vattr_t), KM_SLEEP);
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vap->va_mode = S_IFLNK | S_IRWXUGO;
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vap->va_mask = ATTR_MODE;
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vap->va_uid = current_fsuid();
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vap->va_gid = current_fsgid();
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error = -zfs_symlink(dir, dname(dentry), vap, (char *)name, &ip, cr, 0);
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if (error)
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goto out;
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d_instantiate(dentry, ip);
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out:
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kmem_free(vap, sizeof(vattr_t));
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put_cred(cr);
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ASSERT3S(error, <=, 0);
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return (error);
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}
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static void *
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zpl_follow_link(struct dentry *dentry, struct nameidata *nd)
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{
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(void) zfs_follow_link(dentry, nd);
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return NULL;
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}
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static void
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zpl_put_link(struct dentry *dentry, struct nameidata *nd, void *ptr)
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{
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char *link;
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link = nd_get_link(nd);
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if (!IS_ERR(link))
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kmem_free(link, MAXPATHLEN + 1);
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}
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static int
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zpl_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
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{
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struct inode *ip = old_dentry->d_inode;
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cred_t *cr;
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int error;
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if (ip->i_nlink >= ZFS_LINK_MAX)
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return -EMLINK;
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cr = (cred_t *)get_current_cred();
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ip->i_ctime = CURRENT_TIME_SEC;
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igrab(ip); /* Use ihold() if available */
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error = -zfs_link(dir, ip, dname(dentry), cr);
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if (error) {
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iput(ip);
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goto out;
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}
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d_instantiate(dentry, ip);
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out:
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put_cred(cr);
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ASSERT3S(error, <=, 0);
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return (error);
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}
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const struct inode_operations zpl_inode_operations = {
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.check_acl = NULL,
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.create = zpl_create,
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.link = zpl_link,
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.unlink = zpl_unlink,
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.symlink = zpl_symlink,
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.mkdir = zpl_mkdir,
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.rmdir = zpl_rmdir,
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.mknod = zpl_mknod,
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.rename = zpl_rename,
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.setattr = zpl_setattr,
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.getattr = zpl_getattr,
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.setxattr = generic_setxattr,
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.getxattr = generic_getxattr,
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.removexattr = generic_removexattr,
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.listxattr = zpl_xattr_list,
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};
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const struct inode_operations zpl_dir_inode_operations = {
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.check_acl = NULL,
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.create = zpl_create,
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.lookup = zpl_lookup,
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.link = zpl_link,
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.unlink = zpl_unlink,
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.symlink = zpl_symlink,
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.mkdir = zpl_mkdir,
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.rmdir = zpl_rmdir,
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.mknod = zpl_mknod,
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.rename = zpl_rename,
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.setattr = zpl_setattr,
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};
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const struct inode_operations zpl_symlink_inode_operations = {
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.check_acl = NULL,
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.readlink = generic_readlink,
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.follow_link = zpl_follow_link,
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.put_link = zpl_put_link,
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};
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const struct inode_operations zpl_special_inode_operations = {
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.check_acl = NULL,
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};
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