/*===========================================================================*
* 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_mountpoint *
*===========================================================================*/
PUBLIC 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_inhibread *
*===========================================================================*/
PUBLIC 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_ftrunc *
*===========================================================================*/
PUBLIC 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_create *
*===========================================================================*/
PUBLIC 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 = m.RES_DEV;
return(OK);
}
/*===========================================================================*
* req_bpeek *
*===========================================================================*/
int req_bpeek(endpoint_t fs_e, dev_t dev, u64_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);
return(OK);
}
/*===========================================================================*
* req_getdents *
*===========================================================================*/
PUBLIC 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_statvfs *
*===========================================================================*/
PUBLIC int req_statvfs(int fs_e, int who_e, char *buf)
{
int r;
cp_grant_id_t grant_id;
message m;
grant_id = cpf_grant_magic(fs_e, who_e, (vir_bytes) buf, sizeof(struct statvfs),
CPF_WRITE);
if(grant_id == -1)
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_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_breadwrite *
*===========================================================================*/
PUBLIC 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 *
*===========================================================================*/
PUBLIC 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_mknod *
*===========================================================================*/
PUBLIC 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_lookup *
*===========================================================================*/
PUBLIC int req_lookup(
endpoint_t fs_e,
ino_t dir_ino,
ino_t root_ino,
uid_t uid,
gid_t gid,
int flags,
lookup_res_t *res,
struct fproc *rfp
)
{
int r;
size_t len;
cp_grant_id_t grant_id, grant_id2;
message m;
vfs_ucred_t credentials;
grant_id = cpf_grant_direct(fs_e, (vir_bytes) user_fullpath,
sizeof(user_fullpath), CPF_READ | CPF_WRITE);
if(grant_id == -1)
panic("req_lookup: cpf_grant_direct failed");
len = strlen(user_fullpath) + 1;
m.m_type = REQ_LOOKUP;
m.REQ_GRANT = grant_id;
m.REQ_PATH_LEN = len;
m.REQ_PATH_SIZE = sizeof(user_fullpath);
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);
}
