1177 lines
28 KiB
C
1177 lines
28 KiB
C
/* This file contains the wrapper functions for issueing a request
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* and receiving response from FS processes.
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* Each function builds a request message according to the request
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* parameter, calls the most low-level fs_sendrec and copies
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* back the response.
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* The low-level fs_sendrec handles the recovery mechanism from
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* a dead driver and reissues the request.
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*/
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#include "fs.h"
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/statfs.h>
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#include <sys/statvfs.h>
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#include <minix/vfsif.h>
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#include <minix/com.h>
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#include <minix/const.h>
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#include <minix/endpoint.h>
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#include <minix/u64.h>
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#include <unistd.h>
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#include <minix/vfsif.h>
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#include "fproc.h"
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#include "vmnt.h"
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#include "vnode.h"
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#include "param.h"
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FORWARD _PROTOTYPE(int fs_sendrec_f, (char *file, int line, endpoint_t fs_e,
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message *reqm) );
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#define fs_sendrec(e, m) fs_sendrec_f(__FILE__, __LINE__, (e), (m))
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/*===========================================================================*
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* req_breadwrite *
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*===========================================================================*/
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PUBLIC int req_breadwrite(
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endpoint_t fs_e,
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endpoint_t user_e,
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dev_t dev,
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u64_t pos,
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unsigned int num_of_bytes,
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char *user_addr,
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int rw_flag,
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u64_t *new_posp,
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unsigned int *cum_iop
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)
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{
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int r;
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cp_grant_id_t grant_id;
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message m;
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grant_id = cpf_grant_magic(fs_e, user_e, (vir_bytes) user_addr, num_of_bytes,
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(rw_flag == READING ? CPF_WRITE : CPF_READ));
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if(grant_id == -1)
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panic("req_breadwrite: cpf_grant_magic failed");
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/* Fill in request message */
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m.m_type = rw_flag == READING ? REQ_BREAD : REQ_BWRITE;
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m.REQ_DEV2 = dev;
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m.REQ_GRANT = grant_id;
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m.REQ_SEEK_POS_LO = ex64lo(pos);
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m.REQ_SEEK_POS_HI = ex64hi(pos);
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m.REQ_NBYTES = num_of_bytes;
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/* Send/rec request */
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r = fs_sendrec(fs_e, &m);
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cpf_revoke(grant_id);
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if (r != OK) return(r);
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/* Fill in response structure */
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*new_posp = make64(m.RES_SEEK_POS_LO, m.RES_SEEK_POS_HI);
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*cum_iop = m.RES_NBYTES;
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return(OK);
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}
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/*===========================================================================*
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* req_chmod *
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*===========================================================================*/
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PUBLIC int req_chmod(
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int fs_e,
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ino_t inode_nr,
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mode_t rmode,
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mode_t *new_modep
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)
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{
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message m;
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int r;
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/* Fill in request message */
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m.m_type = REQ_CHMOD;
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m.REQ_INODE_NR = inode_nr;
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m.REQ_MODE = rmode;
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/* Send/rec request */
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r = fs_sendrec(fs_e, &m);
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/* Copy back actual mode. */
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*new_modep = m.RES_MODE;
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return(r);
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}
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/*===========================================================================*
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* req_chown *
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*===========================================================================*/
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PUBLIC int req_chown(
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endpoint_t fs_e,
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ino_t inode_nr,
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uid_t newuid,
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gid_t newgid,
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mode_t *new_modep
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)
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{
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message m;
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int r;
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/* Fill in request message */
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m.m_type = REQ_CHOWN;
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m.REQ_INODE_NR = inode_nr;
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m.REQ_UID = newuid;
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m.REQ_GID = newgid;
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/* Send/rec request */
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r = fs_sendrec(fs_e, &m);
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/* Return new mode to caller. */
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*new_modep = m.RES_MODE;
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return(r);
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}
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/*===========================================================================*
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* req_create *
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*===========================================================================*/
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PUBLIC int req_create(
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int fs_e,
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ino_t inode_nr,
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int omode,
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uid_t uid,
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gid_t gid,
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char *path,
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node_details_t *res
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)
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{
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int r;
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cp_grant_id_t grant_id;
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size_t len;
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message m;
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if (path[0] == '/')
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panic("req_create: filename starts with '/'");
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len = strlen(path) + 1;
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grant_id = cpf_grant_direct(fs_e, (vir_bytes) path, len, CPF_READ);
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if (grant_id == -1)
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panic("req_create: cpf_grant_direct failed");
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/* Fill in request message */
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m.m_type = REQ_CREATE;
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m.REQ_INODE_NR = inode_nr;
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m.REQ_MODE = omode;
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m.REQ_UID = uid;
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m.REQ_GID = gid;
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m.REQ_GRANT = grant_id;
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m.REQ_PATH_LEN = len;
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/* Send/rec request */
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r = fs_sendrec(fs_e, &m);
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cpf_revoke(grant_id);
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if (r != OK) return(r);
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/* Fill in response structure */
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res->fs_e = m.m_source;
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res->inode_nr = m.RES_INODE_NR;
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res->fmode = m.RES_MODE;
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res->fsize = m.RES_FILE_SIZE_LO;
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res->uid = m.RES_UID;
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res->gid = m.RES_GID;
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res->dev = m.RES_DEV;
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return(OK);
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}
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/*===========================================================================*
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* req_flush *
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*===========================================================================*/
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PUBLIC int req_flush(endpoint_t fs_e, dev_t dev)
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{
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message m;
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/* Fill in request message */
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m.m_type = REQ_FLUSH;
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m.REQ_DEV = dev;
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/* Send/rec request */
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return fs_sendrec(fs_e, &m);
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}
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/*===========================================================================*
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* req_fstatfs *
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*===========================================================================*/
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PUBLIC int req_fstatfs(int fs_e, int who_e, char *buf)
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{
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int r;
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cp_grant_id_t grant_id;
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message m;
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grant_id = cpf_grant_magic(fs_e, who_e, (vir_bytes) buf, sizeof(struct statfs),
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CPF_WRITE);
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if(grant_id == -1)
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panic("req_fstatfs: cpf_grant_magic failed");
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/* Fill in request message */
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m.m_type = REQ_FSTATFS;
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m.REQ_GRANT = grant_id;
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/* Send/rec request */
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r = fs_sendrec(fs_e, &m);
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cpf_revoke(grant_id);
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return(r);
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}
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/*===========================================================================*
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* req_statvfs *
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*===========================================================================*/
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PUBLIC int req_statvfs(int fs_e, int who_e, char *buf)
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{
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int r;
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cp_grant_id_t grant_id;
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message m;
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grant_id = cpf_grant_magic(fs_e, who_e, (vir_bytes) buf, sizeof(struct statvfs),
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CPF_WRITE);
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if(grant_id == -1)
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panic("req_statvfs: cpf_grant_magic failed");
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/* Fill in request message */
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m.m_type = REQ_STATVFS;
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m.REQ_GRANT = grant_id;
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/* Send/rec request */
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r = fs_sendrec(fs_e, &m);
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cpf_revoke(grant_id);
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return(r);
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}
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/*===========================================================================*
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* req_ftrunc *
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*===========================================================================*/
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PUBLIC int req_ftrunc(endpoint_t fs_e, ino_t inode_nr, off_t start, off_t end)
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{
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message m;
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/* Fill in request message */
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m.m_type = REQ_FTRUNC;
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m.REQ_INODE_NR = inode_nr;
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m.REQ_TRC_START_LO = start;
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m.REQ_TRC_START_HI = 0; /* Not used for now, so clear it. */
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m.REQ_TRC_END_LO = end;
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m.REQ_TRC_END_HI = 0; /* Not used for now, so clear it. */
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/* Send/rec request */
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return fs_sendrec(fs_e, &m);
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}
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/*===========================================================================*
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* req_getdents *
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*===========================================================================*/
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PUBLIC int req_getdents(
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endpoint_t fs_e,
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ino_t inode_nr,
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u64_t pos,
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char *buf,
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size_t size,
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u64_t *new_pos,
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int direct
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)
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{
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int r;
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message m;
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cp_grant_id_t grant_id;
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if (direct) {
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grant_id = cpf_grant_direct(fs_e, (vir_bytes) buf, size,
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CPF_WRITE);
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} else {
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grant_id = cpf_grant_magic(fs_e, who_e, (vir_bytes) buf, size,
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CPF_WRITE);
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}
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if (grant_id < 0)
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panic("req_getdents: cpf_grant_direct/cpf_grant_magic failed: %d",
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grant_id);
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m.m_type = REQ_GETDENTS;
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m.REQ_INODE_NR = inode_nr;
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m.REQ_GRANT = grant_id;
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m.REQ_MEM_SIZE = size;
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m.REQ_SEEK_POS_LO = ex64lo(pos);
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m.REQ_SEEK_POS_HI = 0; /* Not used for now, so clear it. */
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r = fs_sendrec(fs_e, &m);
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cpf_revoke(grant_id);
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if (r == OK) {
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*new_pos = cvul64(m.RES_SEEK_POS_LO);
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r = m.RES_NBYTES;
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}
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return(r);
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}
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/*===========================================================================*
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* req_inhibread *
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*===========================================================================*/
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PUBLIC int req_inhibread(endpoint_t fs_e, ino_t inode_nr)
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{
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message m;
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/* Fill in request message */
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m.m_type = REQ_INHIBREAD;
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m.REQ_INODE_NR = inode_nr;
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/* Send/rec request */
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return fs_sendrec(fs_e, &m);
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}
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/*===========================================================================*
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* req_link *
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*===========================================================================*/
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PUBLIC int req_link(
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endpoint_t fs_e,
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ino_t link_parent,
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char *lastc,
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ino_t linked_file
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)
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{
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int r;
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cp_grant_id_t grant_id;
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const size_t len = strlen(lastc) + 1;
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message m;
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grant_id = cpf_grant_direct(fs_e, (vir_bytes)lastc, len, CPF_READ);
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if(grant_id == -1)
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panic("req_link: cpf_grant_direct failed");
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/* Fill in request message */
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m.m_type = REQ_LINK;
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m.REQ_INODE_NR = linked_file;
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m.REQ_DIR_INO = link_parent;
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m.REQ_GRANT = grant_id;
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m.REQ_PATH_LEN = len;
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/* Send/rec request */
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r = fs_sendrec(fs_e, &m);
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cpf_revoke(grant_id);
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return(r);
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}
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/*===========================================================================*
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* req_lookup *
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*===========================================================================*/
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PUBLIC int req_lookup(
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endpoint_t fs_e,
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ino_t dir_ino,
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ino_t root_ino,
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uid_t uid,
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gid_t gid,
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int flags,
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lookup_res_t *res,
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struct fproc *rfp
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)
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{
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int r;
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size_t len;
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cp_grant_id_t grant_id=0, grant_id2=0;
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message m;
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vfs_ucred_t credentials;
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grant_id = cpf_grant_direct(fs_e, (vir_bytes) user_fullpath,
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sizeof(user_fullpath), CPF_READ | CPF_WRITE);
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if(grant_id == -1)
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panic("req_lookup: cpf_grant_direct failed");
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len = strlen(user_fullpath) + 1;
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m.m_type = REQ_LOOKUP;
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m.REQ_GRANT = grant_id;
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m.REQ_PATH_LEN = len;
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m.REQ_PATH_SIZE = sizeof(user_fullpath);
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m.REQ_DIR_INO = dir_ino;
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m.REQ_ROOT_INO = root_ino;
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if(rfp->fp_ngroups > 0) { /* Is the process member of multiple groups? */
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/* In that case the FS has to copy the uid/gid credentials */
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int i;
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/* Set credentials */
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credentials.vu_uid = rfp->fp_effuid;
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credentials.vu_gid = rfp->fp_effgid;
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credentials.vu_ngroups = rfp->fp_ngroups;
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for (i = 0; i < rfp->fp_ngroups; i++)
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credentials.vu_sgroups[i] = rfp->fp_sgroups[i];
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grant_id2 = cpf_grant_direct(fs_e, (vir_bytes) &credentials,
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sizeof(credentials), CPF_READ);
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if(grant_id2 == -1)
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panic("req_lookup: cpf_grant_direct failed");
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m.REQ_GRANT2 = grant_id2;
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m.REQ_UCRED_SIZE= sizeof(credentials);
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flags |= PATH_GET_UCRED;
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} else {
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/* When there's only one gid, we can send it directly */
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m.REQ_UID = uid;
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m.REQ_GID = gid;
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flags &= ~PATH_GET_UCRED;
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}
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m.REQ_FLAGS = flags;
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/* Send/rec request */
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r = fs_sendrec(fs_e, &m);
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cpf_revoke(grant_id);
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if(rfp->fp_ngroups > 0) cpf_revoke(grant_id2);
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/* Fill in response according to the return value */
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res->fs_e = m.m_source;
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switch (r) {
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case OK:
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res->inode_nr = m.RES_INODE_NR;
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res->fmode = m.RES_MODE;
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res->fsize = m.RES_FILE_SIZE_LO;
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res->dev = m.RES_DEV;
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res->uid= m.RES_UID;
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res->gid= m.RES_GID;
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break;
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case EENTERMOUNT:
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res->inode_nr = m.RES_INODE_NR;
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res->char_processed = m.RES_OFFSET;
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res->symloop = m.RES_SYMLOOP;
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break;
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case ELEAVEMOUNT:
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res->char_processed = m.RES_OFFSET;
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res->symloop = m.RES_SYMLOOP;
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break;
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case ESYMLINK:
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res->char_processed = m.RES_OFFSET;
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res->symloop = m.RES_SYMLOOP;
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break;
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default:
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break;
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}
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return(r);
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}
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/*===========================================================================*
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* req_mkdir *
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*===========================================================================*/
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PUBLIC int req_mkdir(
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endpoint_t fs_e,
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ino_t inode_nr,
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char *lastc,
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uid_t uid,
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gid_t gid,
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mode_t dmode
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)
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{
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int r;
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cp_grant_id_t grant_id;
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size_t len;
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message m;
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len = strlen(lastc) + 1;
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grant_id = cpf_grant_direct(fs_e, (vir_bytes)lastc, len, CPF_READ);
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if(grant_id == -1)
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panic("req_mkdir: cpf_grant_direct failed");
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/* Fill in request message */
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m.m_type = REQ_MKDIR;
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m.REQ_INODE_NR = inode_nr;
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m.REQ_MODE = dmode;
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m.REQ_UID = uid;
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m.REQ_GID = gid;
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m.REQ_GRANT = grant_id;
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m.REQ_PATH_LEN = len;
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/* Send/rec request */
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r = fs_sendrec(fs_e, &m);
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cpf_revoke(grant_id);
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return(r);
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}
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/*===========================================================================*
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* req_mknod *
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*===========================================================================*/
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PUBLIC int req_mknod(
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endpoint_t fs_e,
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ino_t inode_nr,
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char *lastc,
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uid_t uid,
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gid_t gid,
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mode_t dmode,
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dev_t dev
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)
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{
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int r;
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size_t len;
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cp_grant_id_t grant_id;
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message m;
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len = strlen(lastc) + 1;
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grant_id = cpf_grant_direct(fs_e, (vir_bytes)lastc, len, CPF_READ);
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if(grant_id == -1)
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panic("req_mknod: cpf_grant_direct failed");
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/* Fill in request message */
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m.m_type = REQ_MKNOD;
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m.REQ_INODE_NR = inode_nr;
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m.REQ_MODE = dmode;
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m.REQ_DEV = dev;
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m.REQ_UID = uid;
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m.REQ_GID = gid;
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m.REQ_GRANT = grant_id;
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m.REQ_PATH_LEN = len;
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/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
cpf_revoke(grant_id);
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* 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_newnode *
|
|
*===========================================================================*/
|
|
PUBLIC 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 *
|
|
*===========================================================================*/
|
|
PUBLIC int req_newdriver(
|
|
endpoint_t fs_e,
|
|
dev_t dev,
|
|
endpoint_t driver_e
|
|
)
|
|
{
|
|
/* Note: this is the only request function that doesn't use the
|
|
* fs_sendrec internal routine, since we want to avoid the dead
|
|
* driver recovery mechanism here. This function is actually called
|
|
* during the recovery.
|
|
*/
|
|
message m;
|
|
int r;
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_NEW_DRIVER;
|
|
m.REQ_DEV = dev;
|
|
m.REQ_DRIVER_E = driver_e;
|
|
|
|
/* Issue request */
|
|
if((r = sendrec(fs_e, &m)) != OK) {
|
|
printf("%s:%d VFS req_newdriver: error sending message %d to %d\n",
|
|
__FILE__, __LINE__, r, fs_e);
|
|
util_stacktrace();
|
|
return(r);
|
|
}
|
|
|
|
return(OK);
|
|
}
|
|
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_putnode *
|
|
*===========================================================================*/
|
|
PUBLIC 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 *
|
|
*===========================================================================*/
|
|
PUBLIC int req_rdlink(fs_e, inode_nr, who_e, buf, len, direct)
|
|
endpoint_t fs_e;
|
|
ino_t inode_nr;
|
|
endpoint_t who_e;
|
|
char *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, (vir_bytes) buf, len, CPF_WRITE);
|
|
} else {
|
|
grant_id = cpf_grant_magic(fs_e, who_e, (vir_bytes) 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 *
|
|
*===========================================================================*/
|
|
PUBLIC int req_readsuper(
|
|
endpoint_t fs_e,
|
|
char *label,
|
|
dev_t dev,
|
|
int readonly,
|
|
int isroot,
|
|
struct node_details *res_nodep
|
|
)
|
|
{
|
|
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;
|
|
}
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_readwrite *
|
|
*===========================================================================*/
|
|
PUBLIC 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 *
|
|
*===========================================================================*/
|
|
PUBLIC 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 *
|
|
*===========================================================================*/
|
|
PUBLIC 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 *
|
|
*===========================================================================*/
|
|
PUBLIC int req_slink(
|
|
endpoint_t fs_e,
|
|
ino_t inode_nr,
|
|
char *lastc,
|
|
endpoint_t who_e,
|
|
char *path_addr,
|
|
unsigned short 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 == -1)
|
|
panic("req_slink: cpf_grant_direct failed");
|
|
|
|
gid_buf = cpf_grant_magic(fs_e, who_e, (vir_bytes) path_addr, path_length,
|
|
CPF_READ);
|
|
if(gid_buf == -1) {
|
|
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 *
|
|
*===========================================================================*/
|
|
PUBLIC int req_stat(fs_e, inode_nr, who_e, buf, pos)
|
|
int fs_e;
|
|
ino_t inode_nr;
|
|
int who_e;
|
|
char *buf;
|
|
int pos;
|
|
{
|
|
cp_grant_id_t grant_id;
|
|
int r;
|
|
message m;
|
|
struct stat sb;
|
|
|
|
if (pos != 0)
|
|
grant_id = cpf_grant_direct(fs_e, (vir_bytes) &sb,
|
|
sizeof(struct stat), CPF_WRITE);
|
|
else
|
|
grant_id = cpf_grant_magic(fs_e, who_e, (vir_bytes) 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 && pos != 0) {
|
|
sb.st_size -= pos;
|
|
r = sys_vircopy(SELF, D, (vir_bytes) &sb, who_e, D, (vir_bytes) buf,
|
|
sizeof(struct stat));
|
|
}
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_sync *
|
|
*===========================================================================*/
|
|
PUBLIC 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 *
|
|
*===========================================================================*/
|
|
PUBLIC 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 *
|
|
*===========================================================================*/
|
|
PUBLIC 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 *
|
|
*===========================================================================*/
|
|
PUBLIC 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);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* fs_sendrec *
|
|
*===========================================================================*/
|
|
PRIVATE int fs_sendrec_f(char *file, int line, endpoint_t fs_e, message *reqm)
|
|
{
|
|
/* This is the low level function that sends requests to FS processes.
|
|
* It also handles driver recovery mechanism and reissuing the
|
|
* request which failed due to a dead driver.
|
|
*/
|
|
int r;
|
|
message origm;
|
|
|
|
if(fs_e <= 0 || fs_e == NONE)
|
|
panic("talking to bogus endpoint: %d", fs_e);
|
|
|
|
/* Make a copy of the request so that we can load it back in
|
|
* case of a dead driver */
|
|
origm = *reqm;
|
|
|
|
/* In response to the request we sent, some file systems may send back their
|
|
* own VFS request, instead of a reply. VFS currently offers limited support
|
|
* for this. As long as the FS keeps sending requests, we process them and
|
|
* send back a reply. We break out of the loop as soon as the FS sends a
|
|
* reply to the original request.
|
|
*
|
|
* There is no form of locking or whatever on global data structures, so it
|
|
* is quite easy to mess things up; hence, 'limited' support. A future async
|
|
* VFS will solve this problem for good.
|
|
*/
|
|
for (;;) {
|
|
/* Do the actual send, receive */
|
|
if (OK != (r = sendrec(fs_e, reqm))) {
|
|
printf("VFS:fs_sendrec:%s:%d: error sending message. "
|
|
"FS_e: %d req_nr: %d err: %d\n", file, line, fs_e,
|
|
reqm->m_type, r);
|
|
util_stacktrace();
|
|
return(r);
|
|
}
|
|
|
|
/* If the type field is 0 (OK) or negative (E*), this is a reply. If it
|
|
* contains a positive nonzero value, this is a request.
|
|
*/
|
|
if (reqm->m_type <= 0)
|
|
break; /* Reply */
|
|
|
|
if (reqm->m_type == -EENTERMOUNT || reqm->m_type == -ELEAVEMOUNT ||
|
|
reqm->m_type == -ESYMLINK) {
|
|
|
|
reqm->m_type = -reqm->m_type;
|
|
break; /* Reply */
|
|
}
|
|
|
|
/* Request */
|
|
nested_fs_call(reqm);
|
|
}
|
|
|
|
#if 0
|
|
if(r == OK) {
|
|
/* Sendrec was okay */
|
|
break;
|
|
}
|
|
/* Dead driver */
|
|
if (r == EDEADSRCDST || r == EDSTDIED || r == ESRCDIED) {
|
|
old_driver_e = NONE;
|
|
/* Find old driver by endpoint */
|
|
for (vmp = &vmnt[0]; vmp < &vmnt[NR_MNTS]; ++vmp) {
|
|
if (vmp->m_fs_e == fs_e) { /* found FS */
|
|
#if 0
|
|
old_driver_e = vmp->m_driver_e;
|
|
#endif
|
|
dmap_unmap_by_endpt(old_driver_e); /* unmap driver */
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* No FS ?? */
|
|
if (old_driver_e == NONE)
|
|
panic("VFSdead_driver: couldn't find FS: %d", fs_e);
|
|
|
|
/* Wait for a new driver. */
|
|
for (;;) {
|
|
new_driver_e = 0;
|
|
printf("VFSdead_driver: waiting for new driver\n");
|
|
r = sef_receive(RS_PROC_NR, &m);
|
|
if (r != OK) {
|
|
panic("VFSdead_driver: unable to receive from RS: %d", r);
|
|
}
|
|
if (m.m_type == DEVCTL) {
|
|
/* Map new driver */
|
|
r = fs_devctl(m.ctl_req, m.dev_nr, m.driver_nr,
|
|
m.dev_style, m.m_force);
|
|
if (m.ctl_req == DEV_MAP && r == OK) {
|
|
new_driver_e = m.driver_nr;
|
|
printf("VFSdead_driver: new driver endpoint: %d\n",
|
|
new_driver_e);
|
|
}
|
|
}
|
|
else {
|
|
panic("VFSdead_driver: got message from RS type: %d", m.m_type);
|
|
}
|
|
m.m_type = r;
|
|
if ((r = send(RS_PROC_NR, &m)) != OK) {
|
|
panic("VFSdead_driver: unable to send to RS: %d", r);
|
|
}
|
|
/* New driver is ready */
|
|
if (new_driver_e) break;
|
|
}
|
|
|
|
/* Copy back original request */
|
|
*reqm = origm;
|
|
continue;
|
|
}
|
|
|
|
printf("fs_sendrec: unhandled error %d sending to %d\n", r, fs_e);
|
|
panic("fs_sendrec: unhandled error");
|
|
}
|
|
#endif
|
|
|
|
/* Return message type */
|
|
return(reqm->m_type);
|
|
}
|
|
|