e3b8d4bb58
This patch adds the implementation of the BSD socket system calls which have been introduced in an earlier patch. At the same time, it adds support for communication with socket drivers, using a new "socket device" (SDEV_) protocol. These two parts, implemented in socket.c and sdev.c respectively, form the upper and lower halves of the new BSD socket support in VFS. New mapping functionality for socket domains and drivers is added as well, implemented in smap.c. The rest of the changes mainly facilitate the separation of character and socket driver calls, and do not make any fundamental alterations. For example, while this patch changes VFS's select.c rather heavily, the new select logic for socket drivers is the exact same as for character drivers; the changes mainly separate the driver type specific parts from the generic select logic further than before. Change-Id: I2f13084dd3c8d3a68bfc69da0621120c8291f707
118 lines
4.3 KiB
C
118 lines
4.3 KiB
C
#ifndef __VFS_FPROC_H__
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#define __VFS_FPROC_H__
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#include "threads.h"
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#include <sys/select.h>
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#include <minix/safecopies.h>
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#include <minix/sef.h>
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/* This is the per-process information. A slot is reserved for each potential
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* process. Thus NR_PROCS must be the same as in the kernel. It is not
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* possible or even necessary to tell when a slot is free here.
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*/
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#define LOCK_DEBUG 0
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EXTERN struct fproc {
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unsigned fp_flags;
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pid_t fp_pid; /* process id */
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endpoint_t fp_endpoint; /* kernel endpoint number of this process */
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struct vnode *fp_wd; /* working directory; NULL during reboot */
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struct vnode *fp_rd; /* root directory; NULL during reboot */
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struct filp *fp_filp[OPEN_MAX];/* the file descriptor table (free if NULL) */
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fd_set fp_cloexec_set; /* bit map for POSIX Table 6-2 FD_CLOEXEC */
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dev_t fp_tty; /* major/minor of controlling tty */
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int fp_blocked_on; /* what is it blocked on */
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union ixfer_fp_u { /* state per blocking type */
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struct { /* FP_BLOCKED_ON_PIPE */
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int callnr; /* user call: VFS_READ or VFS_WRITE */
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int fd; /* file descriptor for blocking call */
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vir_bytes buf; /* user buffer address */
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size_t nbytes; /* number of bytes left */
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size_t cum_io; /* partial (write) result byte count */
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} u_pipe;
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struct { /* FP_BLOCKED_ON_POPEN */
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int fd; /* file descriptor for blocking call */
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} u_popen;
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struct { /* FP_BLOCKED_ON_FLOCK */
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int fd; /* file descriptor for blocking call */
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int cmd; /* fcntl command, always F_SETLKW */
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vir_bytes arg; /* user address of flock structure */
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} u_flock;
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/* nothing for FP_BLOCKED_ON_SELECT for now */
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struct { /* FP_BLOCKED_ON_CDEV */
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dev_t dev; /* device number for blocking call */
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endpoint_t endpt; /* driver endpoint */
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cp_grant_id_t grant; /* data grant */
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} u_cdev;
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struct { /* FP_BLOCKED_ON_SDEV */
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dev_t dev; /* socket number for blocking call */
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int callnr; /* user call: a VFS_ socket call */
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cp_grant_id_t grant[3]; /* data grant(s) */
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union ixfer_u_aux {
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int fd; /* listener file descr. (VFS_ACCEPT) */
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vir_bytes buf; /* user buffer address (VFS_RECVMSG) */
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} aux; /* call-specific auxiliary data */
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} u_sdev;
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} fp_u;
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uid_t fp_realuid; /* real user id */
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uid_t fp_effuid; /* effective user id */
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gid_t fp_realgid; /* real group id */
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gid_t fp_effgid; /* effective group id */
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int fp_ngroups; /* number of supplemental groups */
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gid_t fp_sgroups[NGROUPS_MAX];/* supplemental groups */
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mode_t fp_umask; /* mask set by umask system call */
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mutex_t fp_lock; /* mutex to lock fproc object */
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struct worker_thread *fp_worker;/* active worker thread, or NULL */
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void (*fp_func)(void); /* handler function for pending work */
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message fp_msg; /* pending or active message from process */
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message fp_pm_msg; /* pending/active postponed PM request */
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char fp_name[PROC_NAME_LEN]; /* Last exec() */
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#if LOCK_DEBUG
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int fp_vp_rdlocks; /* number of read-only locks on vnodes */
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int fp_vmnt_rdlocks; /* number of read-only locks on vmnts */
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#endif
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} fproc[NR_PROCS];
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/* Shortcuts for block state union substructures. */
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#define fp_pipe fp_u.u_pipe
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#define fp_popen fp_u.u_popen
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#define fp_flock fp_u.u_flock
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#define fp_cdev fp_u.u_cdev
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#define fp_sdev fp_u.u_sdev
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/* fp_flags */
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#define FP_NOFLAGS 0000
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#define FP_SRV_PROC 0001 /* Set if process is a service */
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#define FP_REVIVED 0002 /* Indicates process is being revived */
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#define FP_SESLDR 0004 /* Set if process is session leader */
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#define FP_PENDING 0010 /* Set if process has pending work */
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#define FP_EXITING 0020 /* Set if process is exiting */
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#define FP_PM_WORK 0040 /* Set if process has a postponed PM request */
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/* Field values. */
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#define NOT_REVIVING 0xC0FFEEE /* process is not being revived */
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#define REVIVING 0xDEEAD /* process is being revived from suspension */
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#define PID_FREE 0 /* process slot free */
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/*
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* Upon request from the MIB service, this table is filled with a relatively
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* small subset of per-process fields, so that the MIB service can avoid
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* pulling in the entire fproc table. Other fields may be added to this
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* structure as required by the MIB service.
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*/
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EXTERN struct fproc_light {
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dev_t fpl_tty; /* copy of fproc.fp_tty */
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int fpl_blocked_on; /* copy of fproc.fp_blocked_on */
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endpoint_t fpl_task; /* copy of fproc.fp_task */
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} fproc_light[NR_PROCS];
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#endif /* __VFS_FPROC_H__ */
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