a9d0ffbd0d
The next commit will make mode_t 32-bits, ino_t 64-bits, nlink_t 32-bits, and off_t 64-bits. However, in the protocol there is no room for that. When analyzing the usage of these data types we can see that of mode_t we currently use 15 bits and that future flags (if copied from NetBSD) are only of importance to VFS and not to the actual file system on disk. Therefore we can get away with keeping the protocol version of mode_t (pmode_t) 16 bits. At this point it is unlikely that MINIX will support file systems that can hold more than 2^32 files. Keeping the protocol version of ino_t (pino_t) 32-bits and exposing it as 64-bits to the rest of the system is fine. uid_t and gid_t are already 32-bits, but in behind the scenes they're 16-bits. This is sufficient since we don't support uid/gids larger than 2^16-1. off_t will become 64-bits, but the protocol had room reserved for that since it was revised years ago. So to make the difference clear between what the protocol supports and what is exposed to the system, we define protocol version of these data types. Change-Id: Ifb883aafb222142e69d6dcc3049a47170b78b3ee
1065 lines
25 KiB
C
1065 lines
25 KiB
C
/* This file contains the wrapper functions for issuing 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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*/
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#include "fs.h"
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#include <string.h>
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#include <assert.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 "path.h"
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#include "param.h"
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/*===========================================================================*
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* req_breadwrite *
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*===========================================================================*/
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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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int req_chmod(
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endpoint_t 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 = (pino_t) inode_nr;
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m.REQ_MODE = (pmode_t) 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 = (mode_t) 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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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 = (pino_t) inode_nr;
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m.REQ_UID = (puid_t) newuid;
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m.REQ_GID = (pgid_t) 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 = (mode_t) 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(
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endpoint_t 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 = (pino_t) inode_nr;
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m.REQ_MODE = (pmode_t) omode;
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m.REQ_UID = (puid_t) uid;
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m.REQ_GID = (pgid_t) 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 = (ino_t) m.RES_INODE_NR;
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res->fmode = (mode_t) m.RES_MODE;
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res->fsize = m.RES_FILE_SIZE_LO;
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res->uid = (uid_t) m.RES_UID;
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res->gid = (gid_t) m.RES_GID;
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res->dev = NO_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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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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int req_fstatfs(endpoint_t fs_e, endpoint_t proc_e, vir_bytes 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, proc_e, buf, sizeof(struct statfs),
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CPF_WRITE);
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if (grant_id == GRANT_INVALID)
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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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int req_statvfs(endpoint_t fs_e, endpoint_t proc_e, vir_bytes 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, proc_e, buf, sizeof(struct statvfs),
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CPF_WRITE);
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if(grant_id == GRANT_INVALID)
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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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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 = (pino_t) 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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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 = (pino_t) 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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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 = (pino_t) 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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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 = (pino_t) linked_file;
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m.REQ_DIR_INO = (pino_t) 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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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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struct lookup *resolve,
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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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int flags;
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grant_id = cpf_grant_direct(fs_e, (vir_bytes) resolve->l_path, PATH_MAX,
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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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flags = resolve->l_flags;
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len = strlen(resolve->l_path) + 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 = PATH_MAX + 1;
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m.REQ_DIR_INO = (pino_t) dir_ino;
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m.REQ_ROOT_INO = (pino_t) 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 = (pgid_t) uid;
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m.REQ_GID = (pgid_t) 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 = (ino_t) m.RES_INODE_NR;
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res->fmode = (mode_t) 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 = (uid_t) m.RES_UID;
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res->gid = (gid_t) m.RES_GID;
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break;
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case EENTERMOUNT:
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res->inode_nr = (ino_t) 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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/*===========================================================================*
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* req_mkdir *
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*===========================================================================*/
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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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|
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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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|
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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 = (pino_t) inode_nr;
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m.REQ_MODE = (pmode_t) dmode;
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m.REQ_UID = (puid_t) uid;
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m.REQ_GID = (pgid_t) 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_mknod *
|
|
*===========================================================================*/
|
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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,
|
|
mode_t dmode,
|
|
dev_t dev
|
|
)
|
|
{
|
|
int r;
|
|
size_t len;
|
|
cp_grant_id_t grant_id;
|
|
message m;
|
|
|
|
len = strlen(lastc) + 1;
|
|
grant_id = cpf_grant_direct(fs_e, (vir_bytes)lastc, len, CPF_READ);
|
|
if(grant_id == -1)
|
|
panic("req_mknod: cpf_grant_direct failed");
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_MKNOD;
|
|
m.REQ_INODE_NR = (pino_t) inode_nr;
|
|
m.REQ_MODE = (pmode_t) dmode;
|
|
m.REQ_DEV = dev;
|
|
m.REQ_UID = (puid_t) uid;
|
|
m.REQ_GID = (pgid_t) gid;
|
|
m.REQ_GRANT = grant_id;
|
|
m.REQ_PATH_LEN = len;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
cpf_revoke(grant_id);
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_mountpoint *
|
|
*===========================================================================*/
|
|
int req_mountpoint(endpoint_t fs_e, ino_t inode_nr)
|
|
{
|
|
message m;
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_MOUNTPOINT;
|
|
m.REQ_INODE_NR = (pino_t) inode_nr;
|
|
|
|
/* Send/rec request */
|
|
return fs_sendrec(fs_e, &m);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_newnode *
|
|
*===========================================================================*/
|
|
int req_newnode(
|
|
endpoint_t fs_e,
|
|
uid_t uid,
|
|
gid_t gid,
|
|
mode_t dmode,
|
|
dev_t dev,
|
|
struct node_details *res
|
|
)
|
|
{
|
|
int r;
|
|
message m;
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_NEWNODE;
|
|
m.REQ_MODE = (pmode_t) dmode;
|
|
m.REQ_DEV = dev;
|
|
m.REQ_UID = (puid_t) uid;
|
|
m.REQ_GID = (pgid_t) gid;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
|
|
res->fs_e = m.m_source;
|
|
res->inode_nr = (ino_t) m.RES_INODE_NR;
|
|
res->fmode = (mode_t) m.RES_MODE;
|
|
res->fsize = m.RES_FILE_SIZE_LO;
|
|
res->dev = m.RES_DEV;
|
|
res->uid = (uid_t) m.RES_UID;
|
|
res->gid = (gid_t) m.RES_GID;
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_newdriver *
|
|
*===========================================================================*/
|
|
int req_newdriver(
|
|
endpoint_t fs_e,
|
|
dev_t dev,
|
|
char *label
|
|
)
|
|
{
|
|
cp_grant_id_t grant_id;
|
|
size_t len;
|
|
message m;
|
|
int r;
|
|
|
|
/* Grant access to label */
|
|
len = strlen(label) + 1;
|
|
grant_id = cpf_grant_direct(fs_e, (vir_bytes) label, len, CPF_READ);
|
|
if (grant_id == -1)
|
|
panic("req_newdriver: cpf_grant_direct failed");
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_NEW_DRIVER;
|
|
m.REQ_DEV = dev;
|
|
m.REQ_GRANT = grant_id;
|
|
m.REQ_PATH_LEN = len;
|
|
|
|
/* Issue request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
|
|
cpf_revoke(grant_id);
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_putnode *
|
|
*===========================================================================*/
|
|
int req_putnode(fs_e, inode_nr, count)
|
|
int fs_e;
|
|
ino_t inode_nr;
|
|
int count;
|
|
{
|
|
message m;
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_PUTNODE;
|
|
m.REQ_INODE_NR = (pino_t) inode_nr;
|
|
m.REQ_COUNT = count;
|
|
|
|
/* Send/rec request */
|
|
return fs_sendrec(fs_e, &m);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_rdlink *
|
|
*===========================================================================*/
|
|
int req_rdlink(fs_e, inode_nr, proc_e, buf, len, direct)
|
|
endpoint_t fs_e;
|
|
ino_t inode_nr;
|
|
endpoint_t proc_e;
|
|
vir_bytes buf;
|
|
size_t len;
|
|
int direct; /* set to 1 to use direct grants instead of magic grants */
|
|
{
|
|
message m;
|
|
int r;
|
|
cp_grant_id_t grant_id;
|
|
|
|
if (direct) {
|
|
grant_id = cpf_grant_direct(fs_e, buf, len, CPF_WRITE);
|
|
} else {
|
|
grant_id = cpf_grant_magic(fs_e, proc_e, buf, len, CPF_WRITE);
|
|
}
|
|
if (grant_id == -1)
|
|
panic("req_rdlink: cpf_grant_magic failed");
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_RDLINK;
|
|
m.REQ_INODE_NR = (pino_t) inode_nr;
|
|
m.REQ_GRANT = grant_id;
|
|
m.REQ_MEM_SIZE = len;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
cpf_revoke(grant_id);
|
|
|
|
if (r == OK) r = m.RES_NBYTES;
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_readsuper *
|
|
*===========================================================================*/
|
|
int req_readsuper(
|
|
struct vmnt *vmp,
|
|
char *label,
|
|
dev_t dev,
|
|
int readonly,
|
|
int isroot,
|
|
struct node_details *res_nodep
|
|
)
|
|
{
|
|
int r;
|
|
cp_grant_id_t grant_id;
|
|
size_t len;
|
|
message m;
|
|
endpoint_t fs_e;
|
|
|
|
fs_e = vmp->m_fs_e;
|
|
|
|
len = strlen(label)+1;
|
|
grant_id = cpf_grant_direct(fs_e, (vir_bytes) label, len, CPF_READ);
|
|
if (grant_id == -1)
|
|
panic("req_readsuper: cpf_grant_direct failed");
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_READSUPER;
|
|
m.REQ_FLAGS = 0;
|
|
m.REQ_PROTO = 0;
|
|
VFS_FS_PROTO_PUT_VERSION(m.REQ_PROTO, VFS_FS_CURRENT_VERSION);
|
|
m.REQ_FLAGS |= REQ_HASPROTO;
|
|
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 = (ino_t) m.RES_INODE_NR;
|
|
vmp->m_proto = m.RES_PROTO;
|
|
printf("%d: proto = 0x%x, version=%d conreqs=%d\n", fs_e, vmp->m_proto,
|
|
VFS_FS_PROTO_VERSION(vmp->m_proto), VFS_FS_PROTO_CONREQS(vmp->m_proto));
|
|
res_nodep->fmode = (mode_t) m.RES_MODE;
|
|
res_nodep->fsize = m.RES_FILE_SIZE_LO;
|
|
res_nodep->uid = (uid_t) m.RES_UID;
|
|
res_nodep->gid = (gid_t) m.RES_GID;
|
|
}
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_readwrite *
|
|
*===========================================================================*/
|
|
int req_readwrite(fs_e, inode_nr, pos, rw_flag, user_e,
|
|
user_addr, num_of_bytes, new_posp, cum_iop)
|
|
endpoint_t fs_e;
|
|
ino_t inode_nr;
|
|
u64_t pos;
|
|
int rw_flag;
|
|
endpoint_t user_e;
|
|
char *user_addr;
|
|
unsigned int num_of_bytes;
|
|
u64_t *new_posp;
|
|
unsigned int *cum_iop;
|
|
{
|
|
int r;
|
|
cp_grant_id_t grant_id = -1;
|
|
message m;
|
|
int type = -1;
|
|
int grantflag = -1;
|
|
|
|
/* rw_flag:
|
|
* READING: do i/o from FS, copy into userspace
|
|
* WRITING: do i/o from userspace, copy into FS
|
|
* PEEKING: do i/o in FS, just get the blocks into the cache, no copy
|
|
*/
|
|
|
|
if (ex64hi(pos) != 0)
|
|
panic("req_readwrite: pos too large");
|
|
|
|
assert(rw_flag == READING || rw_flag == WRITING || rw_flag == PEEKING);
|
|
|
|
switch(rw_flag) {
|
|
case READING:
|
|
type = REQ_READ;
|
|
grantflag = CPF_WRITE;
|
|
/* fallthrough */
|
|
case WRITING:
|
|
if(type < 0) { type = REQ_WRITE; grantflag = CPF_READ; }
|
|
grant_id = cpf_grant_magic(fs_e, user_e, (vir_bytes) user_addr,
|
|
num_of_bytes, grantflag);
|
|
if (grant_id == -1)
|
|
panic("req_readwrite: cpf_grant_magic failed");
|
|
break;
|
|
case PEEKING:
|
|
type = REQ_PEEK;
|
|
break;
|
|
default:
|
|
panic("odd rw_flag");
|
|
}
|
|
|
|
/* Fill in request message */
|
|
m.m_type = type;
|
|
m.REQ_INODE_NR = (pino_t) inode_nr;
|
|
m.REQ_GRANT = grant_id;
|
|
m.REQ_SEEK_POS_LO = ex64lo(pos);
|
|
m.REQ_SEEK_POS_HI = 0; /* Not used for now, so clear it. */
|
|
m.REQ_NBYTES = num_of_bytes;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
cpf_revoke(grant_id);
|
|
|
|
if (r == OK) {
|
|
/* Fill in response structure */
|
|
*new_posp = cvul64(m.RES_SEEK_POS_LO);
|
|
*cum_iop = m.RES_NBYTES;
|
|
}
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_rename *
|
|
*===========================================================================*/
|
|
int req_rename(fs_e, old_dir, old_name, new_dir, new_name)
|
|
endpoint_t fs_e;
|
|
ino_t old_dir;
|
|
char *old_name;
|
|
ino_t new_dir;
|
|
char *new_name;
|
|
{
|
|
int r;
|
|
cp_grant_id_t gid_old, gid_new;
|
|
size_t len_old, len_new;
|
|
message m;
|
|
|
|
len_old = strlen(old_name) + 1;
|
|
gid_old = cpf_grant_direct(fs_e, (vir_bytes) old_name, len_old, CPF_READ);
|
|
if(gid_old == -1)
|
|
panic("req_rename: cpf_grant_direct failed");
|
|
|
|
len_new = strlen(new_name) + 1;
|
|
gid_new = cpf_grant_direct(fs_e, (vir_bytes) new_name, len_new, CPF_READ);
|
|
if(gid_new == -1)
|
|
panic("req_rename: cpf_grant_direct failed");
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_RENAME;
|
|
m.REQ_REN_OLD_DIR = (pino_t) old_dir;
|
|
m.REQ_REN_NEW_DIR = (pino_t) new_dir;
|
|
m.REQ_REN_GRANT_OLD = gid_old;
|
|
m.REQ_REN_LEN_OLD = len_old;
|
|
m.REQ_REN_GRANT_NEW = gid_new;
|
|
m.REQ_REN_LEN_NEW = len_new;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
cpf_revoke(gid_old);
|
|
cpf_revoke(gid_new);
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_rmdir *
|
|
*===========================================================================*/
|
|
int req_rmdir(fs_e, inode_nr, lastc)
|
|
endpoint_t fs_e;
|
|
ino_t inode_nr;
|
|
char *lastc;
|
|
{
|
|
int r;
|
|
cp_grant_id_t grant_id;
|
|
size_t len;
|
|
message m;
|
|
|
|
len = strlen(lastc) + 1;
|
|
grant_id = cpf_grant_direct(fs_e, (vir_bytes) lastc, len, CPF_READ);
|
|
if(grant_id == -1)
|
|
panic("req_rmdir: cpf_grant_direct failed");
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_RMDIR;
|
|
m.REQ_INODE_NR = (pino_t) inode_nr;
|
|
m.REQ_GRANT = grant_id;
|
|
m.REQ_PATH_LEN = len;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
cpf_revoke(grant_id);
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_slink *
|
|
*===========================================================================*/
|
|
int req_slink(
|
|
endpoint_t fs_e,
|
|
ino_t inode_nr,
|
|
char *lastc,
|
|
endpoint_t proc_e,
|
|
vir_bytes path_addr,
|
|
size_t path_length,
|
|
uid_t uid,
|
|
gid_t gid
|
|
)
|
|
{
|
|
int r;
|
|
size_t len;
|
|
cp_grant_id_t gid_name, gid_buf;
|
|
message m;
|
|
|
|
len = strlen(lastc) + 1;
|
|
gid_name = cpf_grant_direct(fs_e, (vir_bytes) lastc, len, CPF_READ);
|
|
if (gid_name == GRANT_INVALID)
|
|
panic("req_slink: cpf_grant_direct failed");
|
|
|
|
gid_buf = cpf_grant_magic(fs_e, proc_e, path_addr, path_length, CPF_READ);
|
|
if (gid_buf == GRANT_INVALID) {
|
|
cpf_revoke(gid_name);
|
|
panic("req_slink: cpf_grant_magic failed");
|
|
}
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_SLINK;
|
|
m.REQ_INODE_NR = (pino_t) inode_nr;
|
|
m.REQ_UID = (puid_t) uid;
|
|
m.REQ_GID = (pgid_t) gid;
|
|
m.REQ_GRANT = gid_name;
|
|
m.REQ_PATH_LEN = len;
|
|
m.REQ_GRANT3 = gid_buf;
|
|
m.REQ_MEM_SIZE = path_length;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
cpf_revoke(gid_name);
|
|
cpf_revoke(gid_buf);
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_stat *
|
|
*===========================================================================*/
|
|
int req_stat(endpoint_t fs_e, ino_t inode_nr, endpoint_t proc_e, vir_bytes buf)
|
|
{
|
|
cp_grant_id_t grant_id;
|
|
int r;
|
|
message m;
|
|
|
|
/* Grant FS access to copy straight into user provided buffer */
|
|
grant_id = cpf_grant_magic(fs_e, proc_e, buf, sizeof(struct stat), CPF_WRITE);
|
|
|
|
if (grant_id < 0)
|
|
panic("req_stat: cpf_grant_* failed");
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_STAT;
|
|
m.REQ_INODE_NR = (pino_t) inode_nr;
|
|
m.REQ_GRANT = grant_id;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
cpf_revoke(grant_id);
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_sync *
|
|
*===========================================================================*/
|
|
int req_sync(fs_e)
|
|
endpoint_t fs_e;
|
|
{
|
|
message m;
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_SYNC;
|
|
|
|
/* Send/rec request */
|
|
return fs_sendrec(fs_e, &m);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_unlink *
|
|
*===========================================================================*/
|
|
int req_unlink(fs_e, inode_nr, lastc)
|
|
endpoint_t fs_e;
|
|
ino_t inode_nr;
|
|
char *lastc;
|
|
{
|
|
cp_grant_id_t grant_id;
|
|
size_t len;
|
|
int r;
|
|
message m;
|
|
|
|
len = strlen(lastc) + 1;
|
|
grant_id = cpf_grant_direct(fs_e, (vir_bytes) lastc, len, CPF_READ);
|
|
if(grant_id == -1)
|
|
panic("req_unlink: cpf_grant_direct failed");
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_UNLINK;
|
|
m.REQ_INODE_NR = (pino_t) inode_nr;
|
|
m.REQ_GRANT = grant_id;
|
|
m.REQ_PATH_LEN = len;
|
|
|
|
/* Send/rec request */
|
|
r = fs_sendrec(fs_e, &m);
|
|
cpf_revoke(grant_id);
|
|
|
|
return(r);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_unmount *
|
|
*===========================================================================*/
|
|
int req_unmount(fs_e)
|
|
endpoint_t fs_e;
|
|
{
|
|
message m;
|
|
|
|
/* Fill in request message */
|
|
m.m_type = REQ_UNMOUNT;
|
|
|
|
/* Send/rec request */
|
|
return fs_sendrec(fs_e, &m);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* req_utime *
|
|
*===========================================================================*/
|
|
int req_utime(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 = (pino_t) inode_nr;
|
|
m.REQ_ACTIME = actime;
|
|
m.REQ_MODTIME = modtime;
|
|
|
|
/* Send/rec request */
|
|
return fs_sendrec(fs_e, &m);
|
|
}
|