| Current Path : /sys/fs/coda/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/fs/coda/coda_venus.c |
/*-
* Coda: an Experimental Distributed File System
* Release 3.1
*
* Copyright (c) 1987-1998 Carnegie Mellon University
* All Rights Reserved
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation, and
* that credit is given to Carnegie Mellon University in all documents
* and publicity pertaining to direct or indirect use of this code or its
* derivatives.
*
* CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS,
* SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS
* FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON
* DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER
* RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF
* ANY DERIVATIVE WORK.
*
* Carnegie Mellon encourages users of this software to return any
* improvements or extensions that they make, and to grant Carnegie
* Mellon the rights to redistribute these changes without encumbrance.
*
* @(#) src/sys/cfs/coda_venus.c,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/fs/coda/coda_venus.c 210997 2010-08-07 08:08:14Z rwatson $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/fcntl.h>
#include <sys/ioccom.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sx.h>
#include <fs/coda/coda.h>
#include <fs/coda/cnode.h>
#include <fs/coda/coda_venus.h>
#include <fs/coda/coda_pioctl.h>
#define DECL_NO_IN(name) \
struct coda_in_hdr *inp; \
struct name ## _out *outp; \
int name ## _size = sizeof (struct coda_in_hdr); \
int Isize = sizeof (struct coda_in_hdr); \
int Osize = sizeof (struct name ## _out); \
int error
#define DECL(name) \
struct name ## _in *inp; \
struct name ## _out *outp; \
int name ## _size = sizeof (struct name ## _in); \
int Isize = sizeof (struct name ## _in); \
int Osize = sizeof (struct name ## _out); \
int error
#define DECL_NO_OUT(name) \
struct name ## _in *inp; \
struct coda_out_hdr *outp; \
int name ## _size = sizeof (struct name ## _in); \
int Isize = sizeof (struct name ## _in); \
int Osize = sizeof (struct coda_out_hdr); \
int error
#define ALLOC_NO_IN(name) \
if (Osize > name ## _size) \
name ## _size = Osize; \
CODA_ALLOC(inp, struct coda_in_hdr *, name ## _size); \
outp = (struct name ## _out *) inp
#define ALLOC(name) \
if (Osize > name ## _size) \
name ## _size = Osize; \
CODA_ALLOC(inp, struct name ## _in *, name ## _size); \
outp = (struct name ## _out *) inp
#define ALLOC_NO_OUT(name) \
if (Osize > name ## _size) \
name ## _size = Osize; \
CODA_ALLOC(inp, struct name ## _in *, name ## _size); \
outp = (struct coda_out_hdr *) inp
#define STRCPY(struc, name, len) \
bcopy(name, (char *)inp + (int)inp->struc, len); \
((char*)inp + (int)inp->struc)[len++] = 0; \
Isize += len
#ifdef CODA_COMPAT_5
#define INIT_IN(in, op, ident, p) do { \
(in)->opcode = (op); \
sx_slock(&proctree_lock); \
(in)->pid = p ? p->p_pid : -1; \
(in)->pgid = p ? p->p_pgid : -1; \
(in)->sid = (p && p->p_session && p->p_session->s_leader) ? \
(p->p_session->s_leader->p_pid) : -1; \
sx_sunlock(&proctree_lock); \
if (ident != NOCRED) { \
(in)->cred.cr_uid = ident->cr_uid; \
(in)->cred.cr_groupid = ident->cr_gid; \
} else { \
bzero(&((in)->cred),sizeof(struct coda_cred)); \
(in)->cred.cr_uid = -1; \
(in)->cred.cr_groupid = -1; \
} \
} while (0)
#else
#define INIT_IN(in, op, ident, p) do { \
(in)->opcode = (op); \
(in)->pid = p ? p->p_pid : -1; \
(in)->pgid = p ? p->p_pgid : -1; \
if (ident != NOCRED) \
(in)->uid = ident->cr_uid; \
else \
(in)->uid = -1; \
} while (0)
#endif
#define CNV_OFLAG(to, from) do { \
to = 0; \
if (from & FREAD) to |= C_O_READ; \
if (from & FWRITE) to |= C_O_WRITE; \
if (from & O_TRUNC) to |= C_O_TRUNC; \
if (from & O_EXCL) to |= C_O_EXCL; \
if (from & O_CREAT) to |= C_O_CREAT; \
} while (0)
#define CNV_VV2V_ATTR(top, fromp) do { \
(top)->va_type = (fromp)->va_type; \
(top)->va_mode = (fromp)->va_mode; \
(top)->va_nlink = (fromp)->va_nlink; \
(top)->va_uid = (fromp)->va_uid; \
(top)->va_gid = (fromp)->va_gid; \
(top)->va_fsid = VNOVAL; \
(top)->va_fileid = (fromp)->va_fileid; \
(top)->va_size = (fromp)->va_size; \
(top)->va_blocksize = (fromp)->va_blocksize; \
(top)->va_atime = (fromp)->va_atime; \
(top)->va_mtime = (fromp)->va_mtime; \
(top)->va_ctime = (fromp)->va_ctime; \
(top)->va_gen = (fromp)->va_gen; \
(top)->va_flags = (fromp)->va_flags; \
(top)->va_rdev = (fromp)->va_rdev; \
(top)->va_bytes = (fromp)->va_bytes; \
(top)->va_filerev = (fromp)->va_filerev; \
(top)->va_vaflags = VNOVAL; \
(top)->va_spare = VNOVAL; \
} while (0)
#define CNV_V2VV_ATTR(top, fromp) do { \
(top)->va_type = (fromp)->va_type; \
(top)->va_mode = (fromp)->va_mode; \
(top)->va_nlink = (fromp)->va_nlink; \
(top)->va_uid = (fromp)->va_uid; \
(top)->va_gid = (fromp)->va_gid; \
(top)->va_fileid = (fromp)->va_fileid; \
(top)->va_size = (fromp)->va_size; \
(top)->va_blocksize = (fromp)->va_blocksize; \
(top)->va_atime = (fromp)->va_atime; \
(top)->va_mtime = (fromp)->va_mtime; \
(top)->va_ctime = (fromp)->va_ctime; \
(top)->va_gen = (fromp)->va_gen; \
(top)->va_flags = (fromp)->va_flags; \
(top)->va_rdev = (fromp)->va_rdev; \
(top)->va_bytes = (fromp)->va_bytes; \
(top)->va_filerev = (fromp)->va_filerev; \
} while (0)
int coda_kernel_version = CODA_KERNEL_VERSION;
int
venus_root(void *mdp, struct ucred *cred, struct proc *p,
/*out*/ struct CodaFid *VFid)
{
DECL_NO_IN(coda_root); /* sets Isize & Osize */
ALLOC_NO_IN(coda_root); /* sets inp & outp */
/* send the open to venus. */
INIT_IN(inp, CODA_ROOT, cred, p);
error = coda_call(mdp, Isize, &Osize, (char *)inp);
if (!error)
*VFid = outp->Fid;
CODA_FREE(inp, coda_root_size);
return (error);
}
int
venus_open(void *mdp, struct CodaFid *fid, int flag, struct ucred *cred,
struct proc *p, /*out*/ struct vnode **vp)
{
int cflag;
DECL(coda_open_by_fd); /* sets Isize & Osize */
ALLOC(coda_open_by_fd); /* sets inp & outp */
/* send the open to venus. */
INIT_IN(&inp->ih, CODA_OPEN_BY_FD, cred, p);
inp->Fid = *fid;
CNV_OFLAG(cflag, flag);
inp->flags = cflag;
error = coda_call(mdp, Isize, &Osize, (char *)inp);
*vp = error ? NULL : outp->vp;
CODA_FREE(inp, coda_open_by_fd_size);
return (error);
}
int
venus_close(void *mdp, struct CodaFid *fid, int flag, struct ucred *cred,
struct proc *p)
{
int cflag;
DECL_NO_OUT(coda_close); /* sets Isize & Osize */
ALLOC_NO_OUT(coda_close); /* sets inp & outp */
INIT_IN(&inp->ih, CODA_CLOSE, cred, p);
inp->Fid = *fid;
CNV_OFLAG(cflag, flag);
inp->flags = cflag;
error = coda_call(mdp, Isize, &Osize, (char *)inp);
CODA_FREE(inp, coda_close_size);
return (error);
}
/*
* These two calls will not exist!!! The container file is read/written
* directly.
*/
void
venus_read(void)
{
}
void
venus_write(void)
{
}
/*
* This is a bit sad too. the ioctl's are for the control file, not for
* normal files.
*/
int
venus_ioctl(void *mdp, struct CodaFid *fid, int com, int flag, caddr_t data,
struct ucred *cred, struct proc *p)
{
DECL(coda_ioctl); /* sets Isize & Osize */
struct PioctlData *iap = (struct PioctlData *)data;
int tmp;
coda_ioctl_size = VC_MAXMSGSIZE;
ALLOC(coda_ioctl); /* sets inp & outp */
INIT_IN(&inp->ih, CODA_IOCTL, cred, p);
inp->Fid = *fid;
/*
* Command was mutated by increasing its size field to reflect the
* path and follow args. we need to subtract that out before sending
* the command to venus.
*/
inp->cmd = (com & ~(IOCPARM_MASK << 16));
tmp = ((com >> 16) & IOCPARM_MASK) - sizeof (char *) - sizeof (int);
inp->cmd |= (tmp & IOCPARM_MASK) << 16;
if (iap->vi.in_size > VC_MAXMSGSIZE ||
iap->vi.out_size > VC_MAXMSGSIZE) {
CODA_FREE(inp, coda_ioctl_size);
return (EINVAL);
}
inp->rwflag = flag;
inp->len = iap->vi.in_size;
inp->data = (char *)(sizeof (struct coda_ioctl_in));
error = copyin(iap->vi.in, (char*)inp + (long)inp->data,
iap->vi.in_size);
if (error) {
CODA_FREE(inp, coda_ioctl_size);
return (error);
}
Osize = VC_MAXMSGSIZE;
error = coda_call(mdp, Isize + iap->vi.in_size, &Osize, (char *)inp);
/*
* Copy out the out buffer.
*/
if (!error) {
if (outp->len > iap->vi.out_size)
error = EINVAL;
else
error = copyout((char *)outp + (long)outp->data,
iap->vi.out, iap->vi.out_size);
}
CODA_FREE(inp, coda_ioctl_size);
return (error);
}
int
venus_getattr(void *mdp, struct CodaFid *fid, struct ucred *cred,
struct vattr *vap)
{
struct proc *p;
DECL(coda_getattr); /* sets Isize & Osize */
ALLOC(coda_getattr); /* sets inp & outp */
/*
* Send the open to venus.
*/
p = curthread->td_proc;
INIT_IN(&inp->ih, CODA_GETATTR, cred, p);
inp->Fid = *fid;
error = coda_call(mdp, Isize, &Osize, (char *)inp);
if (!error)
CNV_VV2V_ATTR(vap, &outp->attr);
CODA_FREE(inp, coda_getattr_size);
return (error);
}
int
venus_setattr(void *mdp, struct CodaFid *fid, struct vattr *vap,
struct ucred *cred)
{
struct proc *p;
DECL_NO_OUT(coda_setattr); /* sets Isize & Osize */
ALLOC_NO_OUT(coda_setattr); /* sets inp & outp */
/*
* Send the open to venus.
*/
p = curthread->td_proc;
INIT_IN(&inp->ih, CODA_SETATTR, cred, p);
inp->Fid = *fid;
CNV_V2VV_ATTR(&inp->attr, vap);
error = coda_call(mdp, Isize, &Osize, (char *)inp);
CODA_FREE(inp, coda_setattr_size);
return (error);
}
int
venus_access(void *mdp, struct CodaFid *fid, accmode_t accmode,
struct ucred *cred, struct proc *p)
{
DECL_NO_OUT(coda_access); /* sets Isize & Osize */
ALLOC_NO_OUT(coda_access); /* sets inp & outp */
/*
* Send the open to venus.
*/
INIT_IN(&inp->ih, CODA_ACCESS, cred, p);
inp->Fid = *fid;
/*
* NOTE: FreeBSD and Venus internals use the "data" in the low 3
* bits. Hence, the conversion.
*
* XXX: We cast accmode_t variable into an int.
*/
inp->flags = (int)accmode>>6;
error = coda_call(mdp, Isize, &Osize, (char *)inp);
CODA_FREE(inp, coda_access_size);
return (error);
}
int
venus_readlink(void *mdp, struct CodaFid *fid, struct ucred *cred,
struct proc *p, /*out*/ char **str, int *len)
{
DECL(coda_readlink); /* sets Isize & Osize */
coda_readlink_size += CODA_MAXPATHLEN;
ALLOC(coda_readlink); /* sets inp & outp */
/*
* Send the open to venus.
*/
INIT_IN(&inp->ih, CODA_READLINK, cred, p);
inp->Fid = *fid;
Osize += CODA_MAXPATHLEN;
error = coda_call(mdp, Isize, &Osize, (char *)inp);
if (!error) {
CODA_ALLOC(*str, char *, outp->count);
*len = outp->count;
bcopy((char *)outp + (long)outp->data, *str, *len);
}
CODA_FREE(inp, coda_readlink_size);
return (error);
}
int
venus_fsync(void *mdp, struct CodaFid *fid, struct proc *p)
{
DECL_NO_OUT(coda_fsync); /* sets Isize & Osize */
ALLOC_NO_OUT(coda_fsync); /* sets inp & outp */
/*
* Send the open to venus.
*
* XXX: should be cached mount cred.
*/
INIT_IN(&inp->ih, CODA_FSYNC, NOCRED, p);
inp->Fid = *fid;
error = coda_call(mdp, Isize, &Osize, (char *)inp);
CODA_FREE(inp, coda_fsync_size);
return (error);
}
int
venus_lookup(void *mdp, struct CodaFid *fid, const char *nm, int len,
struct ucred *cred, struct proc *p, /*out*/ struct CodaFid *VFid,
int *vtype)
{
DECL(coda_lookup); /* sets Isize & Osize */
coda_lookup_size += len + 1;
ALLOC(coda_lookup); /* sets inp & outp */
/*
* Send the open to venus.
*/
INIT_IN(&inp->ih, CODA_LOOKUP, cred, p);
inp->Fid = *fid;
/*
* NOTE: Between version 1 and version 2 we have added an extra flag
* field to this structure. But because the string was at the end
* and because of the wierd way we represent strings by having the
* slot point to where the string characters are in the "heap", we
* can just slip the flag parameter in after the string slot pointer
* and veni that don't know better won't see this new flag field ...
* Otherwise we'd need two different venus_lookup functions.
*/
inp->name = Isize;
inp->flags = CLU_CASE_SENSITIVE; /* doesn't really matter for BSD */
STRCPY(name, nm, len); /* increments Isize */
error = coda_call(mdp, Isize, &Osize, (char *)inp);
if (!error) {
*VFid = outp->Fid;
*vtype = outp->vtype;
}
CODA_FREE(inp, coda_lookup_size);
return (error);
}
int
venus_create(void *mdp, struct CodaFid *fid, const char *nm, int len,
int exclusive, int mode, struct vattr *va, struct ucred *cred,
struct proc *p, /*out*/ struct CodaFid *VFid, struct vattr *attr)
{
DECL(coda_create); /* sets Isize & Osize */
coda_create_size += len + 1;
ALLOC(coda_create); /* sets inp & outp */
/*
* Send the open to venus.
*/
INIT_IN(&inp->ih, CODA_CREATE, cred, p);
inp->Fid = *fid;
inp->excl = exclusive ? C_O_EXCL : 0;
inp->mode = mode;
CNV_V2VV_ATTR(&inp->attr, va);
inp->name = Isize;
STRCPY(name, nm, len); /* increments Isize */
error = coda_call(mdp, Isize, &Osize, (char *)inp);
if (!error) {
*VFid = outp->Fid;
CNV_VV2V_ATTR(attr, &outp->attr);
}
CODA_FREE(inp, coda_create_size);
return (error);
}
int
venus_remove(void *mdp, struct CodaFid *fid, const char *nm, int len,
struct ucred *cred, struct proc *p)
{
DECL_NO_OUT(coda_remove); /* sets Isize & Osize */
coda_remove_size += len + 1;
ALLOC_NO_OUT(coda_remove); /* sets inp & outp */
/*
* Send the open to venus.
*/
INIT_IN(&inp->ih, CODA_REMOVE, cred, p);
inp->Fid = *fid;
inp->name = Isize;
STRCPY(name, nm, len); /* increments Isize */
error = coda_call(mdp, Isize, &Osize, (char *)inp);
CODA_FREE(inp, coda_remove_size);
return (error);
}
int
venus_link(void *mdp, struct CodaFid *fid, struct CodaFid *tfid,
const char *nm, int len, struct ucred *cred, struct proc *p)
{
DECL_NO_OUT(coda_link); /* sets Isize & Osize */
coda_link_size += len + 1;
ALLOC_NO_OUT(coda_link); /* sets inp & outp */
/*
* Send the open to venus.
*/
INIT_IN(&inp->ih, CODA_LINK, cred, p);
inp->sourceFid = *fid;
inp->destFid = *tfid;
inp->tname = Isize;
STRCPY(tname, nm, len); /* increments Isize */
error = coda_call(mdp, Isize, &Osize, (char *)inp);
CODA_FREE(inp, coda_link_size);
return (error);
}
int
venus_rename(void *mdp, struct CodaFid *fid, struct CodaFid *tfid,
const char *nm, int len, const char *tnm, int tlen, struct ucred *cred,
struct proc *p)
{
DECL_NO_OUT(coda_rename); /* sets Isize & Osize */
coda_rename_size += len + 1 + tlen + 1;
ALLOC_NO_OUT(coda_rename); /* sets inp & outp */
/*
* Send the open to venus.
*/
INIT_IN(&inp->ih, CODA_RENAME, cred, p);
inp->sourceFid = *fid;
inp->destFid = *tfid;
inp->srcname = Isize;
STRCPY(srcname, nm, len); /* increments Isize */
inp->destname = Isize;
STRCPY(destname, tnm, tlen); /* increments Isize */
error = coda_call(mdp, Isize, &Osize, (char *)inp);
CODA_FREE(inp, coda_rename_size);
return (error);
}
int
venus_mkdir(void *mdp, struct CodaFid *fid, const char *nm, int len,
struct vattr *va, struct ucred *cred, struct proc *p,
/*out*/ struct CodaFid *VFid, struct vattr *ova)
{
DECL(coda_mkdir); /* sets Isize & Osize */
coda_mkdir_size += len + 1;
ALLOC(coda_mkdir); /* sets inp & outp */
/*
* Send the open to venus.
*/
INIT_IN(&inp->ih, CODA_MKDIR, cred, p);
inp->Fid = *fid;
CNV_V2VV_ATTR(&inp->attr, va);
inp->name = Isize;
STRCPY(name, nm, len); /* increments Isize */
error = coda_call(mdp, Isize, &Osize, (char *)inp);
if (!error) {
*VFid = outp->Fid;
CNV_VV2V_ATTR(ova, &outp->attr);
}
CODA_FREE(inp, coda_mkdir_size);
return (error);
}
int
venus_rmdir(void *mdp, struct CodaFid *fid, const char *nm, int len,
struct ucred *cred, struct proc *p)
{
DECL_NO_OUT(coda_rmdir); /* sets Isize & Osize */
coda_rmdir_size += len + 1;
ALLOC_NO_OUT(coda_rmdir); /* sets inp & outp */
/*
* Send the open to venus.
*/
INIT_IN(&inp->ih, CODA_RMDIR, cred, p);
inp->Fid = *fid;
inp->name = Isize;
STRCPY(name, nm, len); /* increments Isize */
error = coda_call(mdp, Isize, &Osize, (char *)inp);
CODA_FREE(inp, coda_rmdir_size);
return (error);
}
int
venus_symlink(void *mdp, struct CodaFid *fid, const char *lnm, int llen,
const char *nm, int len, struct vattr *va, struct ucred *cred,
struct proc *p)
{
DECL_NO_OUT(coda_symlink); /* sets Isize & Osize */
coda_symlink_size += llen + 1 + len + 1;
ALLOC_NO_OUT(coda_symlink); /* sets inp & outp */
/*
* Send the open to venus.
*/
INIT_IN(&inp->ih, CODA_SYMLINK, cred, p);
inp->Fid = *fid;
CNV_V2VV_ATTR(&inp->attr, va);
inp->srcname = Isize;
STRCPY(srcname, lnm, llen); /* increments Isize */
inp->tname = Isize;
STRCPY(tname, nm, len); /* increments Isize */
error = coda_call(mdp, Isize, &Osize, (char *)inp);
CODA_FREE(inp, coda_symlink_size);
return (error);
}
/*
* XXX: Unused.
*/
int
venus_readdir(void *mdp, struct CodaFid *fid, int count, int offset,
struct ucred *cred, struct proc *p, /*out*/ char *buffer, int *len)
{
DECL(coda_readdir); /* sets Isize & Osize */
coda_readdir_size = VC_MAXMSGSIZE;
ALLOC(coda_readdir); /* sets inp & outp */
/*
* Send the open to venus.
*/
INIT_IN(&inp->ih, CODA_READDIR, cred, p);
inp->Fid = *fid;
inp->count = count;
inp->offset = offset;
Osize = VC_MAXMSGSIZE;
error = coda_call(mdp, Isize, &Osize, (char *)inp);
if (!error) {
bcopy((char *)outp + (long)outp->data, buffer, outp->size);
*len = outp->size;
}
CODA_FREE(inp, coda_readdir_size);
return (error);
}
int
venus_fhtovp(void *mdp, struct CodaFid *fid, struct ucred *cred,
struct proc *p, /*out*/ struct CodaFid *VFid, int *vtype)
{
DECL(coda_vget); /* sets Isize & Osize */
ALLOC(coda_vget); /* sets inp & outp */
/*
* Send the open to Venus.
*/
INIT_IN(&inp->ih, CODA_VGET, cred, p);
inp->Fid = *fid;
error = coda_call(mdp, Isize, &Osize, (char *)inp);
if (!error) {
*VFid = outp->Fid;
*vtype = outp->vtype;
}
CODA_FREE(inp, coda_vget_size);
return (error);
}