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minix/servers/vfs/request.c
David van Moolenbroek cc810ee4d9 VFS/FS: replace protocol version with flag field 
The main motivation for this change is that only Loris supports
multithreading, and Loris supports dynamic thread allocation, so the
number of supported threads can be implemented as a bit flag (i.e.,
either 1 or "at least as many as VFS has"). The ABI break obviates the
need to support file system versioning at this time, and several
other aspects are better implemented as flags as well. Other changes:

- replace peek/bpeek test upon mount with FS flag as well;
- mark libsffs as 64-bit file size capable;
- remove old (3.2.1) getdents support.

Change-Id: I313eace9c50ed816656c31cd47d969033d952a03
2014-02-18 11:25:02 +01:00

1120 lines
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/* This file contains the wrapper functions for issuing a request
* and receiving response from FS processes.
* Each function builds a request message according to the request
* parameter, calls the most low-level fs_sendrec, and copies
* back the response.
*/
#include "fs.h"
#include <minix/com.h>
#include <minix/const.h>
#include <minix/endpoint.h>
#include <minix/u64.h>
#include <minix/vfsif.h>
#include <sys/dirent.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <assert.h>
#include <stddef.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include "fproc.h"
#include "param.h"
#include "path.h"
#include "vmnt.h"
#include "vnode.h"
/*===========================================================================*
* req_breadwrite *
*===========================================================================*/
int req_breadwrite(
endpoint_t fs_e,
endpoint_t user_e,
dev_t dev,
off_t pos,
unsigned int num_of_bytes,
vir_bytes user_addr,
int rw_flag,
off_t *new_pos,
unsigned int *cum_iop
)
{
int r;
cp_grant_id_t grant_id;
message m;
grant_id = cpf_grant_magic(fs_e, user_e, user_addr, num_of_bytes,
(rw_flag == READING ? CPF_WRITE : CPF_READ));
if(grant_id == -1)
panic("req_breadwrite: cpf_grant_magic failed");
/* Fill in request message */
m.m_type = rw_flag == READING ? REQ_BREAD : REQ_BWRITE;
m.REQ_DEV2 = dev;
m.REQ_GRANT = grant_id;
m.REQ_SEEK_POS_LO = ex64lo(pos);
m.REQ_SEEK_POS_HI = ex64hi(pos);
m.REQ_NBYTES = num_of_bytes;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
if (r != OK) return(r);
/* Fill in response structure */
*new_pos = make64(m.RES_SEEK_POS_LO, m.RES_SEEK_POS_HI);
*cum_iop = m.RES_NBYTES;
return(OK);
}
/*===========================================================================*
* req_bpeek *
*===========================================================================*/
int req_bpeek(endpoint_t fs_e, dev_t dev, off_t pos, unsigned int num_of_bytes)
{
message m;
memset(&m, 0, sizeof(m));
/* Fill in request message */
m.m_type = REQ_BPEEK;
m.REQ_DEV2 = dev;
m.REQ_SEEK_POS_LO = ex64lo(pos);
m.REQ_SEEK_POS_HI = ex64hi(pos);
m.REQ_NBYTES = num_of_bytes;
/* Send/rec request */
return fs_sendrec(fs_e, &m);
}
/*===========================================================================*
* req_chmod *
*===========================================================================*/
int req_chmod(
endpoint_t fs_e,
ino_t inode_nr,
mode_t rmode,
mode_t *new_modep
)
{
message m;
int r;
/* Fill in request message */
m.m_type = REQ_CHMOD;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_MODE = (pmode_t) rmode;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
/* Copy back actual mode. */
*new_modep = (mode_t) m.RES_MODE;
return(r);
}
/*===========================================================================*
* req_chown *
*===========================================================================*/
int req_chown(
endpoint_t fs_e,
ino_t inode_nr,
uid_t newuid,
gid_t newgid,
mode_t *new_modep
)
{
message m;
int r;
/* Fill in request message */
m.m_type = REQ_CHOWN;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_UID = (puid_t) newuid;
m.REQ_GID = (pgid_t) newgid;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
/* Return new mode to caller. */
*new_modep = (mode_t) m.RES_MODE;
return(r);
}
/*===========================================================================*
* req_create *
*===========================================================================*/
int req_create(
endpoint_t fs_e,
ino_t inode_nr,
int omode,
uid_t uid,
gid_t gid,
char *path,
node_details_t *res
)
{
int r;
cp_grant_id_t grant_id;
size_t len;
message m;
struct vmnt *vmp;
vmp = find_vmnt(fs_e);
len = strlen(path) + 1;
grant_id = cpf_grant_direct(fs_e, (vir_bytes) path, len, CPF_READ);
if (grant_id == -1)
panic("req_create: cpf_grant_direct failed");
/* Fill in request message */
m.m_type = REQ_CREATE;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_MODE = (pmode_t) omode;
m.REQ_UID = (puid_t) uid;
m.REQ_GID = (pgid_t) gid;
m.REQ_GRANT = grant_id;
m.REQ_PATH_LEN = len;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
if (r != OK) return(r);
/* Fill in response structure */
res->fs_e = m.m_source;
res->inode_nr = (ino_t) m.RES_INODE_NR;
res->fmode = (mode_t) m.RES_MODE;
if (vmp->m_fs_flags & RES_64BIT) {
res->fsize = make64(m.RES_FILE_SIZE_LO, m.RES_FILE_SIZE_HI);
} else {
res->fsize = m.RES_FILE_SIZE_LO;
}
res->uid = (uid_t) m.RES_UID;
res->gid = (gid_t) m.RES_GID;
res->dev = NO_DEV;
return(OK);
}
/*===========================================================================*
* req_flush *
*===========================================================================*/
int req_flush(endpoint_t fs_e, dev_t dev)
{
message m;
/* Fill in request message */
m.m_type = REQ_FLUSH;
m.REQ_DEV = dev;
/* Send/rec request */
return fs_sendrec(fs_e, &m);
}
/*===========================================================================*
* req_statvfs *
*===========================================================================*/
int req_statvfs(endpoint_t fs_e, struct statvfs *buf)
{
int r;
cp_grant_id_t grant_id;
message m;
grant_id = cpf_grant_direct(fs_e, (vir_bytes) buf, sizeof(struct statvfs),
CPF_WRITE);
if(grant_id == GRANT_INVALID)
panic("req_statvfs: cpf_grant_direct failed");
/* Fill in request message */
m.m_type = REQ_STATVFS;
m.REQ_GRANT = grant_id;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
return(r);
}
/*===========================================================================*
* req_ftrunc *
*===========================================================================*/
int req_ftrunc(endpoint_t fs_e, ino_t inode_nr, off_t start, off_t end)
{
message m;
struct vmnt *vmp;
vmp = find_vmnt(fs_e);
/* Fill in request message */
m.m_type = REQ_FTRUNC;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_TRC_START_LO = ex64lo(start);
if (vmp->m_fs_flags & RES_64BIT) {
m.REQ_TRC_START_HI = ex64hi(start);
} else if (start > INT_MAX) {
/* FS does not support 64-bit off_t and 32 bits is not enough */
return EINVAL;
} else {
m.REQ_TRC_START_HI = 0;
}
m.REQ_TRC_END_LO = ex64lo(end);
if (vmp->m_fs_flags & RES_64BIT) {
m.REQ_TRC_END_HI = ex64hi(end);
} else if (end > INT_MAX) {
/* FS does not support 64-bit off_t and 32 bits is not enough */
return EINVAL;
} else {
m.REQ_TRC_END_HI = 0;
}
/* Send/rec request */
return fs_sendrec(fs_e, &m);
}
/*===========================================================================*
* req_getdents *
*===========================================================================*/
int req_getdents(
endpoint_t fs_e,
ino_t inode_nr,
off_t pos,
char *buf,
size_t size,
off_t *new_pos,
int direct
)
{
int r;
message m;
cp_grant_id_t grant_id;
struct vmnt *vmp;
vmp = find_vmnt(fs_e);
assert(vmp != NULL);
if (direct) {
grant_id = cpf_grant_direct(fs_e, (vir_bytes) buf, size, CPF_WRITE);
} else {
grant_id = cpf_grant_magic(fs_e, who_e, (vir_bytes) buf, size,
CPF_WRITE);
}
if (grant_id < 0)
panic("req_getdents: cpf_grant_direct/cpf_grant_magic failed: %d",
grant_id);
m.m_type = REQ_GETDENTS;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_GRANT = grant_id;
m.REQ_MEM_SIZE = size;
m.REQ_SEEK_POS_LO = ex64lo(pos);
if (vmp->m_fs_flags & RES_64BIT) {
m.REQ_SEEK_POS_HI = ex64hi(pos);
} else if (pos > INT_MAX) {
/* FS does not support 64-bit off_t and 32 bits is not enough */
return EINVAL;
} else {
m.REQ_SEEK_POS_HI = 0;
}
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
if (r == OK) {
if (vmp->m_fs_flags & RES_64BIT) {
*new_pos = make64(m.RES_SEEK_POS_LO, m.RES_SEEK_POS_HI);
} else {
*new_pos = m.RES_SEEK_POS_LO;
}
r = m.RES_NBYTES;
}
return(r);
}
/*===========================================================================*
* req_inhibread *
*===========================================================================*/
int req_inhibread(endpoint_t fs_e, ino_t inode_nr)
{
message m;
/* Fill in request message */
m.m_type = REQ_INHIBREAD;
m.REQ_INODE_NR = (pino_t) inode_nr;
/* Send/rec request */
return fs_sendrec(fs_e, &m);
}
/*===========================================================================*
* req_link *
*===========================================================================*/
int req_link(
endpoint_t fs_e,
ino_t link_parent,
char *lastc,
ino_t linked_file
)
{
int r;
cp_grant_id_t grant_id;
const size_t len = strlen(lastc) + 1;
message m;
grant_id = cpf_grant_direct(fs_e, (vir_bytes)lastc, len, CPF_READ);
if(grant_id == -1)
panic("req_link: cpf_grant_direct failed");
/* Fill in request message */
m.m_type = REQ_LINK;
m.REQ_INODE_NR = (pino_t) linked_file;
m.REQ_DIR_INO = (pino_t) link_parent;
m.REQ_GRANT = grant_id;
m.REQ_PATH_LEN = len;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
return(r);
}
/*===========================================================================*
* req_lookup *
*===========================================================================*/
int req_lookup(
endpoint_t fs_e,
ino_t dir_ino,
ino_t root_ino,
uid_t uid,
gid_t gid,
struct lookup *resolve,
lookup_res_t *res,
struct fproc *rfp
)
{
message m;
vfs_ucred_t credentials;
int r, flags;
size_t len;
struct vmnt *vmp;
cp_grant_id_t grant_id=0, grant_id2=0;
vmp = find_vmnt(fs_e);
grant_id = cpf_grant_direct(fs_e, (vir_bytes) resolve->l_path, PATH_MAX,
CPF_READ | CPF_WRITE);
if(grant_id == -1)
panic("req_lookup: cpf_grant_direct failed");
flags = resolve->l_flags;
len = strlen(resolve->l_path) + 1;
m.m_type = REQ_LOOKUP;
m.REQ_GRANT = grant_id;
m.REQ_PATH_LEN = len;
m.REQ_PATH_SIZE = PATH_MAX + 1;
m.REQ_DIR_INO = (pino_t) dir_ino;
m.REQ_ROOT_INO = (pino_t) root_ino;
if(rfp->fp_ngroups > 0) { /* Is the process member of multiple groups? */
/* In that case the FS has to copy the uid/gid credentials */
int i;
/* Set credentials */
credentials.vu_uid = rfp->fp_effuid;
credentials.vu_gid = rfp->fp_effgid;
credentials.vu_ngroups = rfp->fp_ngroups;
for (i = 0; i < rfp->fp_ngroups; i++)
credentials.vu_sgroups[i] = rfp->fp_sgroups[i];
grant_id2 = cpf_grant_direct(fs_e, (vir_bytes) &credentials,
sizeof(credentials), CPF_READ);
if(grant_id2 == -1)
panic("req_lookup: cpf_grant_direct failed");
m.REQ_GRANT2 = grant_id2;
m.REQ_UCRED_SIZE= sizeof(credentials);
flags |= PATH_GET_UCRED;
} else {
/* When there's only one gid, we can send it directly */
m.REQ_UID = (pgid_t) uid;
m.REQ_GID = (pgid_t) gid;
flags &= ~PATH_GET_UCRED;
}
m.REQ_FLAGS = flags;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
if(rfp->fp_ngroups > 0) cpf_revoke(grant_id2);
/* Fill in response according to the return value */
res->fs_e = m.m_source;
switch (r) {
case OK:
res->inode_nr = (ino_t) m.RES_INODE_NR;
res->fmode = (mode_t) m.RES_MODE;
if (vmp->m_fs_flags & RES_64BIT) {
res->fsize = make64(m.RES_FILE_SIZE_LO, m.RES_FILE_SIZE_HI);
} else {
res->fsize = m.RES_FILE_SIZE_LO;
}
res->dev = m.RES_DEV;
res->uid = (uid_t) m.RES_UID;
res->gid = (gid_t) m.RES_GID;
break;
case EENTERMOUNT:
res->inode_nr = (ino_t) m.RES_INODE_NR;
res->char_processed = m.RES_OFFSET;
res->symloop = m.RES_SYMLOOP;
break;
case ELEAVEMOUNT:
res->char_processed = m.RES_OFFSET;
res->symloop = m.RES_SYMLOOP;
break;
case ESYMLINK:
res->char_processed = m.RES_OFFSET;
res->symloop = m.RES_SYMLOOP;
break;
default:
break;
}
return(r);
}
/*===========================================================================*
* req_mkdir *
*===========================================================================*/
int req_mkdir(
endpoint_t fs_e,
ino_t inode_nr,
char *lastc,
uid_t uid,
gid_t gid,
mode_t dmode
)
{
int r;
cp_grant_id_t grant_id;
size_t len;
message m;
len = strlen(lastc) + 1;
grant_id = cpf_grant_direct(fs_e, (vir_bytes)lastc, len, CPF_READ);
if(grant_id == -1)
panic("req_mkdir: cpf_grant_direct failed");
/* Fill in request message */
m.m_type = REQ_MKDIR;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_MODE = (pmode_t) dmode;
m.REQ_UID = (puid_t) uid;
m.REQ_GID = (pgid_t) gid;
m.REQ_GRANT = grant_id;
m.REQ_PATH_LEN = len;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
return(r);
}
/*===========================================================================*
* req_mknod *
*===========================================================================*/
int req_mknod(
endpoint_t fs_e,
ino_t inode_nr,
char *lastc,
uid_t uid,
gid_t gid,
mode_t dmode,
dev_t dev
)
{
int r;
size_t len;
cp_grant_id_t grant_id;
message m;
len = strlen(lastc) + 1;
grant_id = cpf_grant_direct(fs_e, (vir_bytes)lastc, len, CPF_READ);
if(grant_id == -1)
panic("req_mknod: cpf_grant_direct failed");
/* Fill in request message */
m.m_type = REQ_MKNOD;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_MODE = (pmode_t) dmode;
m.REQ_DEV = dev;
m.REQ_UID = (puid_t) uid;
m.REQ_GID = (pgid_t) gid;
m.REQ_GRANT = grant_id;
m.REQ_PATH_LEN = len;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
return(r);
}
/*===========================================================================*
* req_mountpoint *
*===========================================================================*/
int req_mountpoint(endpoint_t fs_e, ino_t inode_nr)
{
message m;
/* Fill in request message */
m.m_type = REQ_MOUNTPOINT;
m.REQ_INODE_NR = (pino_t) inode_nr;
/* Send/rec request */
return fs_sendrec(fs_e, &m);
}
/*===========================================================================*
* req_newnode *
*===========================================================================*/
int req_newnode(
endpoint_t fs_e,
uid_t uid,
gid_t gid,
mode_t dmode,
dev_t dev,
struct node_details *res
)
{
struct vmnt *vmp;
int r;
message m;
vmp = find_vmnt(fs_e);
/* Fill in request message */
m.m_type = REQ_NEWNODE;
m.REQ_MODE = (pmode_t) dmode;
m.REQ_DEV = dev;
m.REQ_UID = (puid_t) uid;
m.REQ_GID = (pgid_t) gid;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
res->fs_e = m.m_source;
res->inode_nr = (ino_t) m.RES_INODE_NR;
res->fmode = (mode_t) m.RES_MODE;
if (vmp->m_fs_flags & RES_64BIT) {
res->fsize = make64(m.RES_FILE_SIZE_LO, m.RES_FILE_SIZE_HI);
} else {
res->fsize = m.RES_FILE_SIZE_LO;
}
res->dev = m.RES_DEV;
res->uid = (uid_t) m.RES_UID;
res->gid = (gid_t) m.RES_GID;
return(r);
}
/*===========================================================================*
* req_newdriver *
*===========================================================================*/
int req_newdriver(
endpoint_t fs_e,
dev_t dev,
char *label
)
{
cp_grant_id_t grant_id;
size_t len;
message m;
int r;
/* Grant access to label */
len = strlen(label) + 1;
grant_id = cpf_grant_direct(fs_e, (vir_bytes) label, len, CPF_READ);
if (grant_id == -1)
panic("req_newdriver: cpf_grant_direct failed");
/* Fill in request message */
m.m_type = REQ_NEW_DRIVER;
m.REQ_DEV = dev;
m.REQ_GRANT = grant_id;
m.REQ_PATH_LEN = len;
/* Issue request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
return(r);
}
/*===========================================================================*
* req_putnode *
*===========================================================================*/
int req_putnode(fs_e, inode_nr, count)
int fs_e;
ino_t inode_nr;
int count;
{
message m;
/* Fill in request message */
m.m_type = REQ_PUTNODE;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_COUNT = count;
/* Send/rec request */
return fs_sendrec(fs_e, &m);
}
/*===========================================================================*
* req_rdlink *
*===========================================================================*/
int req_rdlink(fs_e, inode_nr, proc_e, buf, len, direct)
endpoint_t fs_e;
ino_t inode_nr;
endpoint_t proc_e;
vir_bytes buf;
size_t len;
int direct; /* set to 1 to use direct grants instead of magic grants */
{
message m;
int r;
cp_grant_id_t grant_id;
if (direct) {
grant_id = cpf_grant_direct(fs_e, buf, len, CPF_WRITE);
} else {
grant_id = cpf_grant_magic(fs_e, proc_e, buf, len, CPF_WRITE);
}
if (grant_id == -1)
panic("req_rdlink: cpf_grant_magic failed");
/* Fill in request message */
m.m_type = REQ_RDLINK;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_GRANT = grant_id;
m.REQ_MEM_SIZE = len;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
if (r == OK) r = m.RES_NBYTES;
return(r);
}
/*===========================================================================*
* req_readsuper *
*===========================================================================*/
int req_readsuper(
struct vmnt *vmp,
char *label,
dev_t dev,
int readonly,
int isroot,
struct node_details *res,
unsigned int *fs_flags
)
{
int r;
cp_grant_id_t grant_id;
size_t len;
message m;
endpoint_t fs_e;
fs_e = vmp->m_fs_e;
len = strlen(label)+1;
grant_id = cpf_grant_direct(fs_e, (vir_bytes) label, len, CPF_READ);
if (grant_id == -1)
panic("req_readsuper: cpf_grant_direct failed");
/* Fill in request message */
m.m_type = REQ_READSUPER;
m.REQ_FLAGS = 0;
if(readonly) m.REQ_FLAGS |= REQ_RDONLY;
if(isroot) m.REQ_FLAGS |= REQ_ISROOT;
m.REQ_GRANT = grant_id;
m.REQ_DEV = dev;
m.REQ_PATH_LEN = len;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
if(r == OK) {
/* Fill in response structure */
res->fs_e = m.m_source;
res->inode_nr = (ino_t) m.RES_INODE_NR;
res->fmode = (mode_t) m.RES_MODE;
if (m.RES_FLAGS & RES_64BIT) {
res->fsize = make64(m.RES_FILE_SIZE_LO, m.RES_FILE_SIZE_HI);
} else {
res->fsize = m.RES_FILE_SIZE_LO;
}
res->uid = (uid_t) m.RES_UID;
res->gid = (gid_t) m.RES_GID;
*fs_flags = m.RES_FLAGS;
}
return(r);
}
/*===========================================================================*
* req_readwrite *
*===========================================================================*/
int req_readwrite(
endpoint_t fs_e,
ino_t inode_nr,
off_t pos,
int rw_flag,
endpoint_t user_e,
vir_bytes user_addr,
unsigned int num_of_bytes,
off_t *new_posp,
unsigned int *cum_iop)
{
struct vmnt *vmp;
int r;
cp_grant_id_t grant_id;
message m;
vmp = find_vmnt(fs_e);
grant_id = cpf_grant_magic(fs_e, user_e, user_addr, num_of_bytes,
(rw_flag==READING ? CPF_WRITE:CPF_READ));
if (grant_id == -1)
panic("req_readwrite: cpf_grant_magic failed");
/* Fill in request message */
m.m_type = rw_flag == READING ? REQ_READ : REQ_WRITE;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_GRANT = grant_id;
m.REQ_SEEK_POS_LO = ex64lo(pos);
if (vmp->m_fs_flags & RES_64BIT) {
m.REQ_SEEK_POS_HI = ex64hi(pos);
} else if (pos > INT_MAX) {
return EINVAL;
} else {
m.REQ_SEEK_POS_HI = 0;
}
m.REQ_NBYTES = num_of_bytes;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
if (r == OK) {
/* Fill in response structure */
if (vmp->m_fs_flags & RES_64BIT) {
*new_posp = make64(m.RES_SEEK_POS_LO, m.RES_SEEK_POS_HI);
} else {
*new_posp = m.RES_SEEK_POS_LO;
}
*cum_iop = m.RES_NBYTES;
}
return(r);
}
/*===========================================================================*
* req_peek *
*===========================================================================*/
int req_peek(endpoint_t fs_e, ino_t inode_nr, off_t pos, unsigned int bytes)
{
message m;
memset(&m, 0, sizeof(m));
if (ex64hi(pos) != 0)
panic("req_peek: pos too large");
/* Fill in request message */
m.m_type = REQ_PEEK;
m.REQ_INODE_NR = inode_nr;
m.REQ_GRANT = -1;
m.REQ_SEEK_POS_LO = ex64lo(pos);
m.REQ_SEEK_POS_HI = 0; /* Not used for now, so clear it. */
m.REQ_NBYTES = bytes;
/* Send/rec request */
return fs_sendrec(fs_e, &m);
}
/*===========================================================================*
* req_rename *
*===========================================================================*/
int req_rename(fs_e, old_dir, old_name, new_dir, new_name)
endpoint_t fs_e;
ino_t old_dir;
char *old_name;
ino_t new_dir;
char *new_name;
{
int r;
cp_grant_id_t gid_old, gid_new;
size_t len_old, len_new;
message m;
len_old = strlen(old_name) + 1;
gid_old = cpf_grant_direct(fs_e, (vir_bytes) old_name, len_old, CPF_READ);
if(gid_old == -1)
panic("req_rename: cpf_grant_direct failed");
len_new = strlen(new_name) + 1;
gid_new = cpf_grant_direct(fs_e, (vir_bytes) new_name, len_new, CPF_READ);
if(gid_new == -1)
panic("req_rename: cpf_grant_direct failed");
/* Fill in request message */
m.m_type = REQ_RENAME;
m.REQ_REN_OLD_DIR = (pino_t) old_dir;
m.REQ_REN_NEW_DIR = (pino_t) new_dir;
m.REQ_REN_GRANT_OLD = gid_old;
m.REQ_REN_LEN_OLD = len_old;
m.REQ_REN_GRANT_NEW = gid_new;
m.REQ_REN_LEN_NEW = len_new;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(gid_old);
cpf_revoke(gid_new);
return(r);
}
/*===========================================================================*
* req_rmdir *
*===========================================================================*/
int req_rmdir(fs_e, inode_nr, lastc)
endpoint_t fs_e;
ino_t inode_nr;
char *lastc;
{
int r;
cp_grant_id_t grant_id;
size_t len;
message m;
len = strlen(lastc) + 1;
grant_id = cpf_grant_direct(fs_e, (vir_bytes) lastc, len, CPF_READ);
if(grant_id == -1)
panic("req_rmdir: cpf_grant_direct failed");
/* Fill in request message */
m.m_type = REQ_RMDIR;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_GRANT = grant_id;
m.REQ_PATH_LEN = len;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
return(r);
}
/*===========================================================================*
* req_slink *
*===========================================================================*/
int req_slink(
endpoint_t fs_e,
ino_t inode_nr,
char *lastc,
endpoint_t proc_e,
vir_bytes path_addr,
size_t path_length,
uid_t uid,
gid_t gid
)
{
int r;
size_t len;
cp_grant_id_t gid_name, gid_buf;
message m;
len = strlen(lastc) + 1;
gid_name = cpf_grant_direct(fs_e, (vir_bytes) lastc, len, CPF_READ);
if (gid_name == GRANT_INVALID)
panic("req_slink: cpf_grant_direct failed");
gid_buf = cpf_grant_magic(fs_e, proc_e, path_addr, path_length, CPF_READ);
if (gid_buf == GRANT_INVALID) {
cpf_revoke(gid_name);
panic("req_slink: cpf_grant_magic failed");
}
/* Fill in request message */
m.m_type = REQ_SLINK;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_UID = (puid_t) uid;
m.REQ_GID = (pgid_t) gid;
m.REQ_GRANT = gid_name;
m.REQ_PATH_LEN = len;
m.REQ_GRANT3 = gid_buf;
m.REQ_MEM_SIZE = path_length;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(gid_name);
cpf_revoke(gid_buf);
return(r);
}
/*===========================================================================*
* req_stat *
*===========================================================================*/
int req_stat(endpoint_t fs_e, ino_t inode_nr, endpoint_t proc_e, vir_bytes buf)
{
cp_grant_id_t grant_id;
int r;
message m;
/* Grant FS access to copy straight into user provided buffer */
grant_id = cpf_grant_magic(fs_e, proc_e, buf, sizeof(struct stat), CPF_WRITE);
if (grant_id < 0)
panic("req_stat: cpf_grant_* failed");
/* Fill in request message */
m.m_type = REQ_STAT;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_GRANT = grant_id;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
return(r);
}
/*===========================================================================*
* req_sync *
*===========================================================================*/
int req_sync(fs_e)
endpoint_t fs_e;
{
message m;
/* Fill in request message */
m.m_type = REQ_SYNC;
/* Send/rec request */
return fs_sendrec(fs_e, &m);
}
/*===========================================================================*
* req_unlink *
*===========================================================================*/
int req_unlink(fs_e, inode_nr, lastc)
endpoint_t fs_e;
ino_t inode_nr;
char *lastc;
{
cp_grant_id_t grant_id;
size_t len;
int r;
message m;
len = strlen(lastc) + 1;
grant_id = cpf_grant_direct(fs_e, (vir_bytes) lastc, len, CPF_READ);
if(grant_id == -1)
panic("req_unlink: cpf_grant_direct failed");
/* Fill in request message */
m.m_type = REQ_UNLINK;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_GRANT = grant_id;
m.REQ_PATH_LEN = len;
/* Send/rec request */
r = fs_sendrec(fs_e, &m);
cpf_revoke(grant_id);
return(r);
}
/*===========================================================================*
* req_unmount *
*===========================================================================*/
int req_unmount(fs_e)
endpoint_t fs_e;
{
message m;
/* Fill in request message */
m.m_type = REQ_UNMOUNT;
/* Send/rec request */
return fs_sendrec(fs_e, &m);
}
/*===========================================================================*
* req_utime *
*===========================================================================*/
int req_utime(endpoint_t fs_e, ino_t inode_nr, struct timespec * actimespec,
struct timespec * modtimespec)
{
message m;
assert(actimespec != NULL);
assert(modtimespec != NULL);
/* Fill in request message */
m.m_type = REQ_UTIME;
m.REQ_INODE_NR = (pino_t) inode_nr;
m.REQ_INODE_NR = inode_nr;
m.REQ_ACTIME = actimespec->tv_sec;
m.REQ_MODTIME = modtimespec->tv_sec;
m.REQ_ACNSEC = actimespec->tv_nsec;
m.REQ_MODNSEC = modtimespec->tv_nsec;
/* Send/rec request */
return fs_sendrec(fs_e, &m);
}
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