minix/servers/vfs/fproc.h

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#ifndef __VFS_FPROC_H__
#define __VFS_FPROC_H__
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#include "threads.h"
#include <sys/select.h>
#include <minix/safecopies.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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#define LOCK_DEBUG 0
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EXTERN struct fproc {
unsigned fp_flags;
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pid_t fp_pid; /* process id */
endpoint_t fp_endpoint; /* kernel endpoint number of this process */
struct vnode *fp_wd; /* working directory; NULL during reboot */
struct vnode *fp_rd; /* root directory; NULL during reboot */
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struct filp *fp_filp[OPEN_MAX];/* the file descriptor table */
fd_set fp_filp_inuse; /* which fd's are in use? */
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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 */
int fp_block_callnr; /* blocked call if rd/wr can't finish */
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int fp_cum_io_partial; /* partial byte count if rd/wr can't finish */
endpoint_t fp_task; /* which task is proc suspended on */
endpoint_t fp_ioproc; /* proc no. in suspended-on i/o message */
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cp_grant_id_t fp_grant; /* revoke this grant on unsuspend if > -1 */
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uid_t fp_realuid; /* real user id */
uid_t fp_effuid; /* effective user id */
gid_t fp_realgid; /* real group id */
gid_t fp_effgid; /* effective group id */
int fp_ngroups; /* number of supplemental groups */
gid_t fp_sgroups[NGROUPS_MAX];/* supplemental groups */
mode_t fp_umask; /* mask set by umask system call */
message *fp_sendrec; /* request/reply to/from FS/driver */
mutex_t fp_lock; /* mutex to lock fproc object */
struct job fp_job; /* pending job */
thread_t fp_wtid; /* Thread ID of worker */
#if LOCK_DEBUG
int fp_vp_rdlocks; /* number of read-only locks on vnodes */
int fp_vmnt_rdlocks; /* number of read-only locks on vmnts */
#endif
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} fproc[NR_PROCS];
/* fp_flags */
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#define FP_NOFLAGS 00
#define FP_SUSP_REOPEN 01 /* Process is suspended until the reopens are
* completed (after the restart of a driver).
*/
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#define FP_REVIVED 0002 /* Indicates process is being revived */
#define FP_SESLDR 0004 /* Set if process is session leader */
#define FP_PENDING 0010 /* Set if process has pending work */
#define FP_EXITING 0020 /* Set if process is exiting */
#define FP_PM_PENDING 0040 /* Set if process has pending PM request */
#define FP_SYS_PROC 0100 /* Set if process is a driver or FS */
#define FP_DROP_WORK 0200 /* Set if process won't accept new work */
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/* Field values. */
#define NOT_REVIVING 0xC0FFEEE /* process is not being revived */
#define REVIVING 0xDEEAD /* process is being revived from suspension */
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#define PID_FREE 0 /* process slot free */
#endif /* __VFS_FPROC_H__ */