1104 lines
27 KiB
C
1104 lines
27 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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* Sep 2006 (Balazs Gerofi)
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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 <minix/callnr.h>
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#include <minix/com.h>
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#include <minix/keymap.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, 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(fs_e, user_e, dev, pos, num_of_bytes, user_addr,
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rw_flag, new_posp, cum_iop)
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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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int r;
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cp_grant_id_t gid;
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message m;
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gid= cpf_grant_magic(fs_e, user_e, (vir_bytes)user_addr,
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num_of_bytes, (rw_flag == READING ? CPF_WRITE : CPF_READ));
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if (gid == -1)
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panic(__FILE__, "req_breadwrite: cpf_grant_magic failed", NO_NUM);
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/* Fill in request message */
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m.m_type = rw_flag == READING ? REQ_BREAD_S : REQ_BWRITE_S;
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m.REQ_XFD_BDEV = dev;
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m.REQ_XFD_GID = gid;
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m.REQ_XFD_POS_LO = ex64lo(pos);
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m.REQ_XFD_POS_HI = ex64hi(pos);
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m.REQ_XFD_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(gid);
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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_XFD_POS_LO, m.RES_XFD_POS_HI);
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*cum_iop = m.RES_XFD_CUM_IO;
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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(fs_e, inode_nr, rmode, new_modep)
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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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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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m.REQ_UID = fp->fp_effuid;
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m.REQ_GID = fp->fp_effgid;
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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(fs_e, inode_nr, newuid, newgid, new_modep)
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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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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 = fp->fp_effuid;
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m.REQ_GID = fp->fp_effgid;
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m.REQ_NEW_UID = newuid;
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m.REQ_NEW_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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int req_create(fs_e, inode_nr, omode, uid, gid, path, res)
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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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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(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(__FILE__, "req_create: cpf_grant_direct failed", NO_NUM);
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/* Fill in request message */
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m.m_type = REQ_CREATE_S;
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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;
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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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res->inode_index = m.RES_INODE_INDEX;
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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(fs_e, dev)
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endpoint_t fs_e;
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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(fs_e, inode_nr, who_e, buf)
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int fs_e;
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ino_t inode_nr;
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int who_e;
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char *buf;
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{
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int r;
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cp_grant_id_t gid;
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message m;
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gid= cpf_grant_magic(fs_e, who_e, (vir_bytes)buf, sizeof(struct statfs),
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CPF_WRITE);
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if (gid < 0)
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return gid;
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/* Fill in request message */
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m.m_type = REQ_FSTATFS;
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m.REQ_INODE_NR = inode_nr;
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m.REQ_GRANT = gid;
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/* Send/rec request */
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r= fs_sendrec(fs_e, &m);
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cpf_revoke(gid);
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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(fs_e, inode_nr, start, end)
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endpoint_t fs_e;
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ino_t inode_nr;
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off_t start;
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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_FD_INODE_NR = inode_nr;
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m.REQ_FD_START = start;
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m.REQ_FD_END = end;
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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(fs_e, inode_nr, pos, gid, size, pos_change)
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endpoint_t fs_e;
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ino_t inode_nr;
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off_t pos;
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cp_grant_id_t gid;
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size_t size;
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off_t *pos_change;
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{
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int r;
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message m;
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m.m_type= REQ_GETDENTS;
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m.REQ_GDE_INODE= inode_nr;
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m.REQ_GDE_GRANT= gid;
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m.REQ_GDE_SIZE= size;
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m.REQ_GDE_POS= pos;
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r = fs_sendrec(fs_e, &m);
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*pos_change= m.RES_GDE_POS_CHANGE;
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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(fs_e, inode_nr)
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endpoint_t fs_e;
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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(fs_e, link_parent, lastc, linked_file)
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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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int r;
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cp_grant_id_t gid;
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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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gid= cpf_grant_direct(fs_e, (vir_bytes)lastc, len, CPF_READ);
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if (gid == -1)
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panic(__FILE__, "req_link: cpf_grant_direct failed", NO_NUM);
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/* Fill in request message */
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m.m_type = REQ_LINK_S;
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m.REQ_LINKED_FILE = linked_file;
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m.REQ_LINK_PARENT = link_parent;
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m.REQ_GRANT = gid;
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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(gid);
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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(fs_e, path_off, dir_ino, root_ino, uid, gid, flags, res)
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endpoint_t fs_e;
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size_t path_off;
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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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{
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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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#if 0
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printf("req_lookup_s: fs %d, ino %d, root %d, string (off %d) '%s'\n",
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fs_e, dir_ino, root_ino, path_off, user_fullpath+path_off);
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#endif
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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(__FILE__, "req_lookup_s: cpf_grant_direct failed", NO_NUM);
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len= strlen(user_fullpath+path_off) + 1;
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/* Fill in request message */
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m.m_type = REQ_LOOKUP_S;
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m.REQ_L_GRANT = grant_id;
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m.REQ_L_PATH_LEN = len;
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m.REQ_L_PATH_SIZE = sizeof(user_fullpath);
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m.REQ_L_PATH_OFF = path_off;
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m.REQ_L_DIR_INO = dir_ino;
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m.REQ_L_ROOT_INO = root_ino;
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m.REQ_L_FLAGS = flags;
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m.REQ_L_UID = uid;
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m.REQ_L_GID = gid;
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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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/* 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;
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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_SYMLOOP2;
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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_SYMLOOP2;
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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_SYMLOOP2;
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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(fs_e, inode_nr, lastc, uid, gid, dmode)
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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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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 (gid == -1)
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panic(__FILE__, "req_mkdir: cpf_grant_direct failed", NO_NUM);
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/* Fill in request message */
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m.m_type = REQ_MKDIR_S;
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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(fs_e, inode_nr, lastc, uid, gid, dmode, dev)
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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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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 (gid == -1)
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panic(__FILE__, "req_mknod: cpf_grant_direct failed", NO_NUM);
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/* Fill in request message */
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m.m_type = REQ_MKNOD_S;
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m.REQ_INODE_NR = inode_nr;
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m.REQ_MODE = dmode;
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m.REQ_DEVx = 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 */
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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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/*===========================================================================*
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* req_mountpoint *
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*===========================================================================*/
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PUBLIC int req_mountpoint(fs_e, inode_nr)
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endpoint_t fs_e;
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ino_t inode_nr;
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{
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int r;
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message m;
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/* Fill in request message */
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m.m_type = REQ_MOUNTPOINT_S;
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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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/*===========================================================================*
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* req_newnode *
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*===========================================================================*/
|
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PUBLIC int req_newnode(fs_e, uid, gid, dmode, dev, res)
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endpoint_t fs_e;
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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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struct node_details *res;
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{
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int r;
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message m;
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|
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/* Fill in request message */
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m.m_type = REQ_NEWNODE;
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m.REQ_MODE = dmode;
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m.REQ_DEVx = dev;
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m.REQ_UID = uid;
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m.REQ_GID = gid;
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/* Send/rec request */
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r = fs_sendrec(fs_e, &m);
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|
res->fs_e = m.m_source;
|
|
res->inode_nr = m.RES_INODE_NR;
|
|
res->fmode = m.RES_MODE;
|
|
res->fsize = m.RES_FILE_SIZE;
|
|
res->dev = m.RES_DEV;
|
|
res->uid= m.RES_UID;
|
|
res->gid= m.RES_GID;
|
|
|
|
return r;
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_newdriver *
|
|
*===========================================================================*/
|
|
PUBLIC int req_newdriver(fs_e, dev, driver_e)
|
|
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("VFSreq_newdriver: error sending message to %d: %d\n", fs_e, r);
|
|
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)
|
|
endpoint_t fs_e;
|
|
ino_t inode_nr;
|
|
endpoint_t who_e;
|
|
vir_bytes buf;
|
|
size_t len;
|
|
{
|
|
message m;
|
|
int r;
|
|
cp_grant_id_t gid;
|
|
|
|
gid= cpf_grant_magic(fs_e, who_e, buf, len, CPF_WRITE);
|
|
if (gid == -1)
|
|
panic(__FILE__, "req_rdlink: cpf_grant_magic failed", NO_NUM);
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_RDLINK_S;
|
|
m.REQ_INODE_NR = inode_nr;
|
|
m.REQ_GRANT = gid;
|
|
m.REQ_SLENGTH = len;
|
|
|
|
/* Send/rec request */
|
|
r= fs_sendrec(fs_e, &m);
|
|
|
|
cpf_revoke(gid);
|
|
|
|
return r;
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_readsuper *
|
|
*===========================================================================*/
|
|
PUBLIC int req_readsuper(fs_e, label, dev, readonly, isroot, res_nodep)
|
|
endpoint_t fs_e;
|
|
char *label;
|
|
dev_t dev;
|
|
int readonly;
|
|
int isroot;
|
|
struct node_details *res_nodep;
|
|
{
|
|
int r;
|
|
cp_grant_id_t gid;
|
|
size_t len;
|
|
message m;
|
|
|
|
len= strlen(label)+1;
|
|
gid= cpf_grant_direct(fs_e, (vir_bytes)label, len, CPF_READ);
|
|
if (gid == -1)
|
|
panic(__FILE__, "req_req_readsuper: cpf_grant_direct failed", NO_NUM);
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_READSUPER_S;
|
|
m.REQ_READONLY = readonly;
|
|
m.REQ_GRANT2 = gid;
|
|
m.REQ_DEV = dev;
|
|
m.REQ_ISROOT = isroot;
|
|
m.REQ_PATH_LEN = len;
|
|
|
|
/* Send/rec request */
|
|
if ((r = fs_sendrec(fs_e, &m)) != OK) return r;
|
|
|
|
/* 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;
|
|
res_nodep->uid = m.RES_UID;
|
|
res_nodep->gid = m.RES_GID;
|
|
|
|
return OK;
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_readwrite *
|
|
*===========================================================================*/
|
|
PUBLIC int req_readwrite(fs_e, inode_nr, inode_index, pos, rw_flag, user_e,
|
|
user_addr, num_of_bytes, new_posp, cum_iop)
|
|
endpoint_t fs_e;
|
|
ino_t inode_nr;
|
|
unsigned short inode_index;
|
|
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 gid;
|
|
message m;
|
|
|
|
if (ex64hi(pos) != 0)
|
|
panic(__FILE__, "req_readwrite: pos too large", NO_NUM);
|
|
|
|
gid= cpf_grant_magic(fs_e, user_e, (vir_bytes)user_addr,
|
|
num_of_bytes, (rw_flag == READING ? CPF_WRITE : CPF_READ));
|
|
if (gid == -1)
|
|
panic(__FILE__, "req_readwrite: cpf_grant_magic failed", NO_NUM);
|
|
|
|
/* Fill in request message */
|
|
m.m_type = rw_flag == READING ? REQ_READ_S : REQ_WRITE_S;
|
|
m.REQ_FD_INODE_NR = inode_nr;
|
|
m.REQ_FD_GID = gid;
|
|
m.REQ_FD_POS = ex64lo(pos);
|
|
m.REQ_FD_NBYTES = num_of_bytes;
|
|
m.REQ_FD_INODE_INDEX = inode_index;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
|
|
cpf_revoke(gid);
|
|
|
|
if (r != OK) return r;
|
|
|
|
/* Fill in response structure */
|
|
*new_posp = cvul64(m.RES_FD_POS);
|
|
*cum_iop = m.RES_FD_CUM_IO;
|
|
|
|
return OK;
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* 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(__FILE__, "req_rename: cpf_grant_direct failed", NO_NUM);
|
|
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(__FILE__, "req_rename: cpf_grant_direct failed", NO_NUM);
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_RENAME_S;
|
|
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 gid;
|
|
size_t len;
|
|
message m;
|
|
|
|
len= strlen(lastc) + 1;
|
|
gid= cpf_grant_direct(fs_e, (vir_bytes)lastc, len, CPF_READ);
|
|
if (gid == -1)
|
|
panic(__FILE__, "req_rmdir: cpf_grant_direct failed", NO_NUM);
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_RMDIR_S;
|
|
m.REQ_INODE_NR = inode_nr;
|
|
m.REQ_GRANT = gid;
|
|
m.REQ_PATH_LEN = len;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
|
|
cpf_revoke(gid);
|
|
|
|
return r;
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_slink *
|
|
*===========================================================================*/
|
|
PUBLIC int req_slink(fs_e, inode_nr, lastc, who_e, path_addr, path_length,
|
|
uid, gid)
|
|
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(__FILE__, "req_slink: cpf_grant_direct failed", NO_NUM);
|
|
|
|
gid_buf= cpf_grant_magic(fs_e, who_e, (vir_bytes)path_addr,
|
|
path_length, CPF_READ);
|
|
if (gid_buf == -1)
|
|
{
|
|
cpf_revoke(gid_buf);
|
|
panic(__FILE__, "req_slink: cpf_grant_magic failed", NO_NUM);
|
|
}
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_SLINK_S;
|
|
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_GRANT2 = gid_buf;
|
|
m.REQ_SLENGTH = 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 gid;
|
|
int r;
|
|
message m;
|
|
struct stat sb;
|
|
|
|
if (pos != 0)
|
|
{
|
|
gid= cpf_grant_direct(fs_e, (vir_bytes)&sb, sizeof(struct stat),
|
|
CPF_WRITE);
|
|
}
|
|
else
|
|
{
|
|
gid= cpf_grant_magic(fs_e, who_e, (vir_bytes)buf, sizeof(struct stat),
|
|
CPF_WRITE);
|
|
}
|
|
if (gid < 0)
|
|
return gid;
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_STAT;
|
|
m.REQ_INODE_NR = inode_nr;
|
|
m.REQ_GRANT = gid;
|
|
|
|
/* Send/rec request */
|
|
r= fs_sendrec(fs_e, &m);
|
|
|
|
cpf_revoke(gid);
|
|
|
|
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 gid;
|
|
size_t len;
|
|
int r;
|
|
message m;
|
|
|
|
len= strlen(lastc) + 1;
|
|
gid= cpf_grant_direct(fs_e, (vir_bytes)lastc, len, CPF_READ);
|
|
if (gid == -1)
|
|
panic(__FILE__, "req_unlink: cpf_grant_direct failed", NO_NUM);
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_UNLINK_S;
|
|
m.REQ_INODE_NR = inode_nr;
|
|
m.REQ_GRANT = gid;
|
|
m.REQ_PATH_LEN = len;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
|
|
cpf_revoke(gid);
|
|
|
|
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, old_driver_e, new_driver_e;
|
|
message origm, m;
|
|
struct vmnt *vmp;
|
|
|
|
if (fs_e == PM_PROC_NR)
|
|
{
|
|
printf("from %s, %d\n", file, line);
|
|
panic(__FILE__, "talking to PM", NO_NUM);
|
|
}
|
|
|
|
/* Make a copy of the request so that we can load it back in
|
|
* case of a dead driver */
|
|
origm = *reqm;
|
|
|
|
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);
|
|
}
|
|
|
|
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 */
|
|
old_driver_e = vmp->m_driver_e;
|
|
dmap_unmap_by_endpt(old_driver_e); /* unmap driver */
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* No FS ?? */
|
|
if (old_driver_e == NONE)
|
|
panic(__FILE__, "VFSdead_driver: couldn't find FS\n", fs_e);
|
|
|
|
/* Wait for a new driver. */
|
|
for (;;) {
|
|
new_driver_e = 0;
|
|
printf("VFSdead_driver: waiting for new driver\n");
|
|
r = receive(RS_PROC_NR, &m);
|
|
if (r != OK) {
|
|
panic(__FILE__, "VFSdead_driver: unable to receive from RS",
|
|
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(__FILE__, "VFSdead_driver: got message from RS, type",
|
|
m.m_type);
|
|
}
|
|
m.m_type = r;
|
|
if ((r = send(RS_PROC_NR, &m)) != OK) {
|
|
panic(__FILE__, "VFSdead_driver: unable to send to RS",
|
|
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(__FILE__, "fs_sendrec: unhandled error", NO_NUM);
|
|
}
|
|
|
|
/* Return message type */
|
|
return reqm->m_type;
|
|
}
|
|
|
|
|