/*
* 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 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* Simple nfs ops - open, close, read, and lseek.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <rpc/types.h>
#include <rpc/auth.h>
#include <sys/t_lock.h>
#include "clnt.h"
#include <sys/fcntl.h>
#include <sys/vfs.h>
#include <errno.h>
#include <sys/promif.h>
#include <rpc/xdr.h>
#include "nfs_inet.h"
#include <sys/stat.h>
#include <sys/bootvfs.h>
#include <sys/bootdebug.h>
#include <sys/salib.h>
#include <sys/sacache.h>
#include <rpc/rpc.h>
#include "brpc.h"
#include <rpcsvc/nfs_prot.h>
#include "socket_inet.h"
#include "mac.h"
#include <sys/mode.h>
ushort_t vttoif_tab[] = {
0, S_IFREG, S_IFDIR, S_IFBLK, S_IFCHR, S_IFLNK, S_IFIFO,
S_IFDOOR, 0, S_IFSOCK, 0
};
static int file_desc = 1;
static struct nfs_files {
struct nfs_file file;
int desc;
struct nfs_files *next;
} nfs_files[1] = {
{0, 0, 0},
};
#define dprintf if (boothowto & RB_DEBUG) printf
static int boot_nfs_open(char *filename, int flags);
static int boot_nfs_close(int fd);
static ssize_t boot_nfs_read(int fd, caddr_t buf, size_t size);
static off_t boot_nfs_lseek(int, off_t, int);
static int boot_nfs_fstat(int fd, struct bootstat *stp);
static void boot_nfs_closeall(int flag);
static int boot_nfs_getdents(int fd, struct dirent *dep, unsigned size);
struct boot_fs_ops boot_nfs_ops = {
"nfs",
boot_nfs_mountroot,
boot_nfs_unmountroot,
boot_nfs_open,
boot_nfs_close,
boot_nfs_read,
boot_nfs_lseek,
boot_nfs_fstat,
boot_nfs_closeall,
boot_nfs_getdents
};
/*
* bootops.c calls a closeall() function to close all open files. Since
* we only permit one open file at a time (not counting the device), this
* is simple to implement.
*/
/*ARGSUSED*/
static void
boot_nfs_closeall(int flag)
{
struct nfs_files *filep;
#ifdef NFS_OPS_DEBUG
if ((boothowto & DBFLAGS) == DBFLAGS)
printf("boot_nfs_closeall(%x)\n", flag);
#endif
if (nfs_files->file.version == 0 &&
nfs_files->desc == 0 &&
nfs_files->next == NULL)
return;
/* delete any dynamically allocated entries */
while ((filep = nfs_files->next) != NULL) {
nfs_files->next = filep->next;
bkmem_free((caddr_t)filep, sizeof (struct nfs_files));
}
/* clear the first, static file */
bzero((caddr_t)nfs_files, sizeof (struct nfs_files));
/* Close device */
release_cache(mac_get_dev());
mac_fini();
}
/*
* Get a file pointer given a file descriptor. Return 0 on error
*/
static struct nfs_files *
get_filep(int fd)
{
struct nfs_files *filep;
for (filep = nfs_files; filep; filep = filep->next) {
if (fd == filep->desc)
return (filep);
}
return (NULL);
}
/*
* Unmount the root fs -- not supported for this fstype.
*/
int
boot_nfs_unmountroot(void)
{
return (-1);
}
/*
* open a file for reading. Note: writing is NOT supported.
*/
static int
boot_nfs_open(char *path, int flags)
{
struct nfs_files *filep, *newfilep;
int got_filep;
#ifdef NFS_OPS_DEBUG
if ((boothowto & DBFLAGS) == DBFLAGS)
printf("boot_nfs_open(%s, %x)\n", path, flags);
#endif
/* file can only be opened readonly. */
if (flags & ~O_RDONLY) {
dprintf("boot_nfs_open: files can only be opened O_RDONLY.\n");
return (-1);
}
if (path == NULL || *path == '\0') {
dprintf("boot_nfs_open: NULL or EMPTY pathname argument.\n");
return (-1);
}
/* Try and find a vacant file pointer */
filep = nfs_files;
got_filep = FALSE;
do {
if (filep->desc == 0) {
filep->desc = file_desc++;
got_filep = TRUE;
break; /* We've got a file pointer */
}
/* Get next entry if not at end of list */
if (filep->next)
filep = filep->next;
} while (filep->next);
/* If a a vacant file pointer cannot be found, make one */
if (!got_filep) {
if ((newfilep = (struct nfs_files *)
bkmem_zalloc(sizeof (struct nfs_files))) == 0) {
dprintf("open: Cannot allocate file pointer\n");
return (-1);
}
filep->next = newfilep;
filep = newfilep;
filep->desc = file_desc++;
}
if (lookup(path, &filep->file, FALSE) != 0) {
#ifdef NFS_OPS_DEBUG
if ((boothowto & DBFLAGS) == DBFLAGS)
printf("boot_nfs_open(): Cannot open '%s'.\n", path);
#endif
/* zero file pointer */
bzero((caddr_t)filep, sizeof (struct nfs_file));
filep->desc = 0;
return (-1);
}
bzero(&filep->file.cookie, sizeof (filep->file.cookie));
#ifdef NFS_OPS_DEBUG
if ((boothowto & DBFLAGS) == DBFLAGS)
printf("boot_nfs_open(): '%s' successful, fd = 0x%x\n",
path, filep->desc);
#endif
return (filep->desc);
}
/*
* close a previously opened file.
*/
static int
boot_nfs_close(int fd)
{
struct nfs_files *filep;
#ifdef NFS_OPS_DEBUG
if ((boothowto & DBFLAGS) == DBFLAGS)
printf("boot_nfs_close(%d)\n", fd);
#endif
if ((filep = get_filep(fd)) == 0)
return (0);
/*
* zero file pointer
*/
bzero((caddr_t)&filep->file, sizeof (struct nfs_file));
/*
* "close" the fd.
*/
filep->desc = 0;
return (0);
}
/*
* read from a file.
*/
static ssize_t
boot_nfs_read(int fd, char *buf, size_t size)
{
struct nfs_files *filep;
int count = 0;
if (fd == 0) {
dprintf("boot_nfs_read: Bad file number.\n");
return (-1);
}
if (buf == NULL) {
dprintf("boot_nfs_read: Bad address.\n");
return (-1);
}
#ifdef NFS_OPS_DEBUG
if ((boothowto & DBFLAGS) == DBFLAGS)
printf("boot_nfs_read(%d, %x, 0x%x)\n", fd, buf, size);
#endif
/* initialize for read */
if ((filep = get_filep(fd)) == 0)
return (-1);
switch (filep->file.version) {
case NFS_VERSION:
count = nfsread(&filep->file, buf, size);
break;
case NFS_V3:
count = nfs3read(&filep->file, buf, size);
break;
case NFS_V4:
count = nfs4read(&filep->file, buf, size);
break;
default:
printf("boot_nfs_read: NFS Version %d not supported\n",
filep->file.version);
count = -1;
break;
}
#ifdef NFS_OPS_DEBUG
if ((boothowto & DBFLAGS) == DBFLAGS)
printf("boot_nfs_read(): 0x%x bytes.\n", count);
#endif
return (count);
}
/*
* lseek - move read file pointer.
*/
static off_t
boot_nfs_lseek(int fd, off_t offset, int whence)
{
struct nfs_files *filep;
#ifdef NFS_OPS_DEBUG
if ((boothowto & DBFLAGS) == DBFLAGS)
printf("boot_nfs_lseek(%d, 0x%x, %d)\n", fd, offset, whence);
#endif
if (fd == 0) {
dprintf("boot_nfs_lseek: Bad file number.\n");
return (-1);
}
if ((filep = get_filep(fd)) == 0)
return (-1);
switch (whence) {
case SEEK_SET:
/*
* file ptr is set to offset from beginning of file
*/
filep->file.offset = offset;
break;
case SEEK_CUR:
/*
* file ptr is set to offset from current position
*/
filep->file.offset += offset;
break;
case SEEK_END:
/*
* file ptr is set to current size of file plus offset.
* But since we only support reading, this is illegal.
*/
default:
/*
* invalid offset origin
*/
dprintf("boot_nfs_lseek: invalid whence value.\n");
return (-1);
}
#ifdef notyet
return (filep->file.offset);
#else
/*
* BROKE - lseek should return the offset seeked to on a
* successful seek, not zero - This must be fixed in the
* kernel before It can be fixed here.
*/
return (0);
#endif /* notyet */
}
/*
* This version of fstat supports mode, size, inode #, and times only.
* It can be enhanced if more is required,
*/
static int
boot_nfs_fstat(int fd, struct bootstat *stp)
{
struct vattr va;
struct nfs_files *filep;
int status;
#ifdef NFS_OPS_DEBUG
if ((boothowto & DBFLAGS) == DBFLAGS) {
printf("boot_nfs_fstat(%d, 0x%x)\n", fd, stp);
}
#endif
if (fd == 0) {
dprintf("boot_nfs_fstat(): Bad file number 0.\n");
return (-1);
}
if ((filep = get_filep(fd)) == 0)
return (-1);
bzero((char *)&va, sizeof (va));
va.va_mask = AT_TYPE | AT_SIZE | AT_MODE | AT_NODEID |
AT_ATIME | AT_CTIME | AT_MTIME;
switch (filep->file.version) {
case NFS_VERSION:
status = nfsgetattr(&filep->file, &va);
break;
case NFS_V3:
status = nfs3getattr(&filep->file, &va);
break;
case NFS_V4:
status = nfs4getattr(&filep->file, &va);
break;
default:
printf("boot_nfs_fstat: NFS Version %d not supported\n",
filep->file.version);
status = -1;
break;
}
if (status != 0)
return (-1);
if (va.va_size > (u_offset_t)MAXOFF_T) {
dprintf("boot_nfs_fstat(): File too large.\n");
return (-1);
}
stp->st_size = (off_t)va.va_size;
stp->st_mode = VTTOIF(va.va_type) | va.va_mode;
stp->st_atim.tv_sec = va.va_atime.tv_sec;
stp->st_atim.tv_nsec = va.va_atime.tv_nsec;
stp->st_ctim.tv_sec = va.va_ctime.tv_sec;
stp->st_ctim.tv_nsec = va.va_ctime.tv_nsec;
stp->st_mtim.tv_sec = va.va_mtime.tv_sec;
stp->st_mtim.tv_nsec = va.va_mtime.tv_nsec;
stp->st_ino = (ino_t)va.va_nodeid;
#ifdef NFS_OPS_DEBUG
if ((boothowto & DBFLAGS) == DBFLAGS)
printf("boot_nfs_fstat(): done.\n");
#endif
return (0);
}
static int
boot_nfs_getdents(int fd, struct dirent *dep, unsigned size)
{
struct nfs_files *filep;
int status;
#ifdef NFS_OPS_DEBUG
if ((boothowto & DBFLAGS) == DBFLAGS) {
printf("boot_nfs_getdents(%d, 0x%x, 0x%x)\n", fd, dep, size);
}
#endif
if (fd == 0) {
dprintf("boot_nfs_getdents(): Bad file number 0.\n");
return (-1);
}
if ((filep = get_filep(fd)) == 0)
return (-1);
switch (filep->file.version) {
case NFS_VERSION:
status = nfsgetdents(&filep->file, dep, size);
break;
case NFS_V3:
status = nfs3getdents(&filep->file, dep, size);
break;
default:
printf("boot_nfs_getdents: NFS Version %d not supported\n",
filep->file.version);
status = -1;
}
#ifdef NFS_OPS_DEBUG
if ((boothowto & DBFLAGS) == DBFLAGS)
printf("boot_nfs_getdents(): done.\n");
#endif
return (status);
}