7dd286e6b8
The VFS/FS protocol does not require the file server to supply a special device node number in response to a REQ_CREATE request, as this call creates only regular files. Therefore, VFS should not erroneously save this piece of information from the REQ_CREATE reply either.
1079 lines
25 KiB
C
1079 lines
25 KiB
C
/* 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 <string.h>
|
|
#include <assert.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/statfs.h>
|
|
#include <sys/statvfs.h>
|
|
#include <minix/vfsif.h>
|
|
#include <minix/com.h>
|
|
#include <minix/const.h>
|
|
#include <minix/endpoint.h>
|
|
#include <minix/u64.h>
|
|
#include <unistd.h>
|
|
#include <minix/vfsif.h>
|
|
#include "fproc.h"
|
|
#include "vmnt.h"
|
|
#include "vnode.h"
|
|
#include "path.h"
|
|
#include "param.h"
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_breadwrite *
|
|
*===========================================================================*/
|
|
int req_breadwrite(
|
|
endpoint_t fs_e,
|
|
endpoint_t user_e,
|
|
dev_t dev,
|
|
u64_t pos,
|
|
unsigned int num_of_bytes,
|
|
char *user_addr,
|
|
int rw_flag,
|
|
u64_t *new_posp,
|
|
unsigned int *cum_iop
|
|
)
|
|
{
|
|
int r;
|
|
cp_grant_id_t grant_id;
|
|
message m;
|
|
|
|
grant_id = cpf_grant_magic(fs_e, user_e, (vir_bytes) 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_posp = make64(m.RES_SEEK_POS_LO, m.RES_SEEK_POS_HI);
|
|
*cum_iop = m.RES_NBYTES;
|
|
|
|
return(OK);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_chmod *
|
|
*===========================================================================*/
|
|
int req_chmod(
|
|
int 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 = inode_nr;
|
|
m.REQ_MODE = rmode;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
|
|
/* Copy back actual mode. */
|
|
*new_modep = 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 = inode_nr;
|
|
m.REQ_UID = newuid;
|
|
m.REQ_GID = newgid;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
|
|
/* Return new mode to caller. */
|
|
*new_modep = m.RES_MODE;
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_create *
|
|
*===========================================================================*/
|
|
int req_create(
|
|
int 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;
|
|
|
|
if (path[0] == '/')
|
|
panic("req_create: filename starts with '/'");
|
|
|
|
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 = inode_nr;
|
|
m.REQ_MODE = omode;
|
|
m.REQ_UID = uid;
|
|
m.REQ_GID = 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 = m.RES_INODE_NR;
|
|
res->fmode = m.RES_MODE;
|
|
res->fsize = m.RES_FILE_SIZE_LO;
|
|
res->uid = m.RES_UID;
|
|
res->gid = 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_fstatfs *
|
|
*===========================================================================*/
|
|
int req_fstatfs(endpoint_t fs_e, endpoint_t proc_e, vir_bytes buf)
|
|
{
|
|
int r;
|
|
cp_grant_id_t grant_id;
|
|
message m;
|
|
|
|
grant_id = cpf_grant_magic(fs_e, proc_e, buf, sizeof(struct statfs),
|
|
CPF_WRITE);
|
|
if (grant_id == GRANT_INVALID)
|
|
panic("req_fstatfs: cpf_grant_magic failed");
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_FSTATFS;
|
|
m.REQ_GRANT = grant_id;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
cpf_revoke(grant_id);
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_statvfs *
|
|
*===========================================================================*/
|
|
int req_statvfs(endpoint_t fs_e, endpoint_t proc_e, vir_bytes buf)
|
|
{
|
|
int r;
|
|
cp_grant_id_t grant_id;
|
|
message m;
|
|
|
|
grant_id = cpf_grant_magic(fs_e, proc_e, buf, sizeof(struct statvfs),
|
|
CPF_WRITE);
|
|
if(grant_id == GRANT_INVALID)
|
|
panic("req_statvfs: cpf_grant_magic 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;
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_FTRUNC;
|
|
m.REQ_INODE_NR = inode_nr;
|
|
m.REQ_TRC_START_LO = start;
|
|
m.REQ_TRC_START_HI = 0; /* Not used for now, so clear it. */
|
|
m.REQ_TRC_END_LO = end;
|
|
m.REQ_TRC_END_HI = 0; /* Not used for now, so clear it. */
|
|
|
|
/* Send/rec request */
|
|
return fs_sendrec(fs_e, &m);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_getdents *
|
|
*===========================================================================*/
|
|
int req_getdents(
|
|
endpoint_t fs_e,
|
|
ino_t inode_nr,
|
|
u64_t pos,
|
|
char *buf,
|
|
size_t size,
|
|
u64_t *new_pos,
|
|
int direct
|
|
)
|
|
{
|
|
int r;
|
|
message m;
|
|
cp_grant_id_t grant_id;
|
|
|
|
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 = inode_nr;
|
|
m.REQ_GRANT = grant_id;
|
|
m.REQ_MEM_SIZE = size;
|
|
m.REQ_SEEK_POS_LO = ex64lo(pos);
|
|
m.REQ_SEEK_POS_HI = 0; /* Not used for now, so clear it. */
|
|
|
|
r = fs_sendrec(fs_e, &m);
|
|
cpf_revoke(grant_id);
|
|
|
|
if (r == OK) {
|
|
*new_pos = cvul64(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 = 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 = linked_file;
|
|
m.REQ_DIR_INO = 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
|
|
)
|
|
{
|
|
int r;
|
|
size_t len;
|
|
cp_grant_id_t grant_id=0, grant_id2=0;
|
|
message m;
|
|
vfs_ucred_t credentials;
|
|
int flags;
|
|
|
|
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 = dir_ino;
|
|
m.REQ_ROOT_INO = 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 = uid;
|
|
m.REQ_GID = 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 = m.RES_INODE_NR;
|
|
res->fmode = m.RES_MODE;
|
|
res->fsize = m.RES_FILE_SIZE_LO;
|
|
res->dev = m.RES_DEV;
|
|
res->uid= m.RES_UID;
|
|
res->gid= m.RES_GID;
|
|
break;
|
|
case EENTERMOUNT:
|
|
res->inode_nr = 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 = inode_nr;
|
|
m.REQ_MODE = dmode;
|
|
m.REQ_UID = uid;
|
|
m.REQ_GID = 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 = inode_nr;
|
|
m.REQ_MODE = dmode;
|
|
m.REQ_DEV = dev;
|
|
m.REQ_UID = uid;
|
|
m.REQ_GID = 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 = 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
|
|
)
|
|
{
|
|
int r;
|
|
message m;
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_NEWNODE;
|
|
m.REQ_MODE = dmode;
|
|
m.REQ_DEV = dev;
|
|
m.REQ_UID = uid;
|
|
m.REQ_GID = gid;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
|
|
res->fs_e = m.m_source;
|
|
res->inode_nr = m.RES_INODE_NR;
|
|
res->fmode = m.RES_MODE;
|
|
res->fsize = m.RES_FILE_SIZE_LO;
|
|
res->dev = m.RES_DEV;
|
|
res->uid = m.RES_UID;
|
|
res->gid = 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 = 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 = 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(
|
|
endpoint_t fs_e,
|
|
char *label,
|
|
dev_t dev,
|
|
int readonly,
|
|
int isroot,
|
|
struct node_details *res_nodep,
|
|
int *con_reqs
|
|
)
|
|
{
|
|
int r;
|
|
cp_grant_id_t grant_id;
|
|
size_t len;
|
|
message m;
|
|
|
|
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_nodep->fs_e = m.m_source;
|
|
res_nodep->inode_nr = m.RES_INODE_NR;
|
|
res_nodep->fmode = m.RES_MODE;
|
|
res_nodep->fsize = m.RES_FILE_SIZE_LO;
|
|
res_nodep->uid = m.RES_UID;
|
|
res_nodep->gid = m.RES_GID;
|
|
*con_reqs = m.RES_CONREQS;
|
|
}
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_readwrite *
|
|
*===========================================================================*/
|
|
int req_readwrite(fs_e, inode_nr, pos, rw_flag, user_e,
|
|
user_addr, num_of_bytes, new_posp, cum_iop)
|
|
endpoint_t fs_e;
|
|
ino_t inode_nr;
|
|
u64_t pos;
|
|
int rw_flag;
|
|
endpoint_t user_e;
|
|
char *user_addr;
|
|
unsigned int num_of_bytes;
|
|
u64_t *new_posp;
|
|
unsigned int *cum_iop;
|
|
{
|
|
int r;
|
|
cp_grant_id_t grant_id;
|
|
message m;
|
|
|
|
if (ex64hi(pos) != 0)
|
|
panic("req_readwrite: pos too large");
|
|
|
|
grant_id = cpf_grant_magic(fs_e, user_e, (vir_bytes) 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 = inode_nr;
|
|
m.REQ_GRANT = grant_id;
|
|
m.REQ_SEEK_POS_LO = ex64lo(pos);
|
|
m.REQ_SEEK_POS_HI = 0; /* Not used for now, so clear it. */
|
|
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 */
|
|
*new_posp = cvul64(m.RES_SEEK_POS_LO);
|
|
*cum_iop = m.RES_NBYTES;
|
|
}
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* 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 = old_dir;
|
|
m.REQ_REN_NEW_DIR = 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 = 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 = inode_nr;
|
|
m.REQ_UID = uid;
|
|
m.REQ_GID = 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,
|
|
int old_stat)
|
|
{
|
|
cp_grant_id_t grant_id;
|
|
int r;
|
|
message m;
|
|
struct stat sb;
|
|
struct minix_prev_stat old_sb; /* for backward compatibility */
|
|
|
|
if (old_stat == 1) {
|
|
/* We're dealing with the old stat() call. First copy stat structure
|
|
* to VFS so we can convert the new struct stat to the old version.
|
|
*/
|
|
grant_id = cpf_grant_direct(fs_e, (vir_bytes) &sb, sizeof(struct stat),
|
|
CPF_WRITE);
|
|
} else {
|
|
/* 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 = inode_nr;
|
|
m.REQ_GRANT = grant_id;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
cpf_revoke(grant_id);
|
|
|
|
if (r != OK || old_stat == 0)
|
|
return(r);
|
|
|
|
#if defined(_NETBSD_SOURCE)
|
|
#undef st_atime
|
|
#undef st_ctime
|
|
#undef st_mtime
|
|
#endif
|
|
|
|
/* Copy field by field because of st_gid type mismatch and
|
|
* difference in order after atime.
|
|
*/
|
|
old_sb.st_dev = sb.st_dev;
|
|
old_sb.st_ino = sb.st_ino;
|
|
old_sb.st_mode = sb.st_mode;
|
|
old_sb.st_nlink = sb.st_nlink;
|
|
old_sb.st_uid = sb.st_uid;
|
|
old_sb.st_gid = sb.st_gid;
|
|
old_sb.st_rdev = sb.st_rdev;
|
|
old_sb.st_size = sb.st_size;
|
|
#if defined(_NETBSD_SOURCE)
|
|
old_sb.st_atime = sb.st_atimespec.tv_sec;
|
|
old_sb.st_mtime = sb.st_mtimespec.tv_sec;
|
|
old_sb.st_ctime = sb.st_ctimespec.tv_sec;
|
|
#else
|
|
old_sb.st_atime = sb.st_atime;
|
|
old_sb.st_mtime = sb.st_mtime;
|
|
old_sb.st_ctime = sb.st_ctime;
|
|
#endif
|
|
|
|
r = sys_vircopy(SELF, (vir_bytes) &old_sb, proc_e, buf,
|
|
sizeof(struct minix_prev_stat));
|
|
|
|
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 = 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(fs_e, inode_nr, actime, modtime)
|
|
endpoint_t fs_e;
|
|
ino_t inode_nr;
|
|
time_t actime;
|
|
time_t modtime;
|
|
{
|
|
message m;
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_UTIME;
|
|
m.REQ_INODE_NR = inode_nr;
|
|
m.REQ_ACTIME = actime;
|
|
m.REQ_MODTIME = modtime;
|
|
|
|
/* Send/rec request */
|
|
return fs_sendrec(fs_e, &m);
|
|
}
|