minix/servers/vfs/glo.h

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#ifndef __VFS_GLO_H__
#define __VFS_GLO_H__
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/* EXTERN should be extern except for the table file */
#ifdef _TABLE
#undef EXTERN
#define EXTERN
#endif
/* File System global variables */
EXTERN struct fproc *fp; /* pointer to caller's fproc struct */
EXTERN int susp_count; /* number of procs suspended on pipe */
EXTERN int nr_locks; /* number of locks currently in place */
EXTERN int reviving; /* number of pipe processes to be revived */
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EXTERN int pending;
EXTERN int sending;
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EXTERN dev_t ROOT_DEV; /* device number of the root device */
EXTERN int ROOT_FS_E; /* kernel endpoint of the root FS proc */
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EXTERN u32_t system_hz; /* system clock frequency. */
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/* The parameters of the call are kept here. */
EXTERN message m_in; /* the input message itself */
EXTERN message m_out; /* the output message used for reply */
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# define who_p ((int) (fp - fproc))
# define isokslot(p) (p >= 0 && \
p < (int)(sizeof(fproc) / sizeof(struct fproc)))
#if 0
# define who_e (isokslot(who_p) ? fp->fp_endpoint : m_in.m_source)
#else
# define who_e (isokslot(who_p) && fp->fp_endpoint != NONE ? \
fp->fp_endpoint : m_in.m_source)
#endif
# define call_nr (m_in.m_type)
# define super_user (fp->fp_effuid == SU_UID ? 1 : 0)
# define scratch(p) (scratchpad[((int) ((p) - fproc))])
EXTERN struct worker_thread *self;
EXTERN int force_sync; /* toggle forced synchronous communication */
EXTERN int deadlock_resolving;
EXTERN mutex_t exec_lock;
EXTERN mutex_t bsf_lock;/* Global lock for access to block special files */
EXTERN struct worker_thread workers[NR_WTHREADS];
EXTERN struct worker_thread sys_worker;
EXTERN struct worker_thread dl_worker;
EXTERN char mount_label[LABEL_MAX]; /* label of file system to mount */
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/* The following variables are used for returning results to the caller. */
EXTERN int err_code; /* temporary storage for error number */
/* Data initialized elsewhere. */
extern _PROTOTYPE (int (*call_vec[]), (void) ); /* sys call table */
extern _PROTOTYPE (int (*pfs_call_vec[]), (void) ); /* pfs callback table */
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extern char dot1[2]; /* dot1 (&dot1[0]) and dot2 (&dot2[0]) have a special */
extern char dot2[3]; /* meaning to search_dir: no access permission check. */
extern char mode_map[]; /* mapping from O_ACCMODE mask to R_BIT/W_BIT flags */
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#endif