1efb473f89
The Linux specific file operations have all been located in the file zpl_file.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 first zpl_* commit also includes a common zpl.h header with minimal entries to register the Linux specific hooks. In also adds all the new zpl_* file to the Makefile.in. This is not a standalone commit, you required the following zpl_* commits.
174 lines
3.9 KiB
C
174 lines
3.9 KiB
C
/*
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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/zfs_znode.h>
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#include <sys/zpl.h>
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static int
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zpl_readdir(struct file *filp, void *dirent, filldir_t filldir)
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{
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struct dentry *dentry = filp->f_path.dentry;
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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_readdir(dentry->d_inode, dirent, filldir,
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&filp->f_pos, 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_fsync(struct file *filp, struct dentry *dentry, int datasync)
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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_fsync(filp->f_path.dentry->d_inode, datasync, 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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ssize_t
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zpl_read_common(struct inode *ip, const char *buf, size_t len, loff_t pos,
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uio_seg_t segment, int flags, cred_t *cr)
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{
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int error;
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struct iovec iov;
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uio_t uio;
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iov.iov_base = (void *)buf;
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iov.iov_len = len;
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uio.uio_iov = &iov;
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uio.uio_resid = len;
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uio.uio_iovcnt = 1;
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uio.uio_loffset = pos;
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uio.uio_limit = MAXOFFSET_T;
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uio.uio_segflg = segment;
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error = -zfs_read(ip, &uio, flags, cr);
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if (error < 0)
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return (error);
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return (len - uio.uio_resid);
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}
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static ssize_t
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zpl_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos)
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{
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cred_t *cr;
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ssize_t read;
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cr = (cred_t *)get_current_cred();
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read = zpl_read_common(filp->f_mapping->host, buf, len, *ppos,
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UIO_USERSPACE, filp->f_flags, cr);
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put_cred(cr);
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if (read < 0)
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return (read);
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*ppos += read;
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return (read);
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}
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ssize_t
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zpl_write_common(struct inode *ip, const char *buf, size_t len, loff_t pos,
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uio_seg_t segment, int flags, cred_t *cr)
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{
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int error;
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struct iovec iov;
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uio_t uio;
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iov.iov_base = (void *)buf;
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iov.iov_len = len;
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uio.uio_iov = &iov;
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uio.uio_resid = len,
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uio.uio_iovcnt = 1;
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uio.uio_loffset = pos;
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uio.uio_limit = MAXOFFSET_T;
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uio.uio_segflg = segment;
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error = -zfs_write(ip, &uio, flags, cr);
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if (error < 0)
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return (error);
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return (len - uio.uio_resid);
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}
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static ssize_t
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zpl_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
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{
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cred_t *cr;
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ssize_t wrote;
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cr = (cred_t *)get_current_cred();
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wrote = zpl_write_common(filp->f_mapping->host, buf, len, *ppos,
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UIO_USERSPACE, filp->f_flags, cr);
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put_cred(cr);
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if (wrote < 0)
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return (wrote);
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*ppos += wrote;
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return (wrote);
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}
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const struct address_space_operations zpl_address_space_operations = {
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#if 0
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.readpage = zpl_readpage,
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.writepage = zpl_writepage,
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.direct_IO = zpl_direct_IO,
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#endif
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};
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const struct file_operations zpl_file_operations = {
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.open = generic_file_open,
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.llseek = generic_file_llseek,
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.read = zpl_read, /* do_sync_read */
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.write = zpl_write, /* do_sync_write */
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.readdir = zpl_readdir,
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.mmap = generic_file_mmap,
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.fsync = zpl_fsync,
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.aio_read = NULL, /* generic_file_aio_read */
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.aio_write = NULL, /* generic_file_aio_write */
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};
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const struct file_operations zpl_dir_file_operations = {
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.llseek = generic_file_llseek,
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.read = generic_read_dir,
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.readdir = zpl_readdir,
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.fsync = zpl_fsync,
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};
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