minix/servers/vfs/glo.h
Thomas Veerman 13ef7f1f38 Prepare VFS to support back calls from PFS. For security reasons and to support
file descriptor passing, PFS does some back calls to VFS. For example, to
verify the validity of a path provided by a process and to tell VFS it must
copy file descriptors from one process to another.
2010-08-30 13:44:07 +00:00

39 lines
1.8 KiB
C

/* 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 super_user; /* 1 if caller is super_user, else 0 */
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 */
EXTERN dev_t root_dev; /* device number of the root device */
EXTERN int ROOT_FS_E; /* kernel endpoint of the root FS proc */
EXTERN int last_login_fs_e; /* endpoint of the FS proc that logged in
before the corresponding mount request */
EXTERN u32_t system_hz; /* system clock frequency. */
/* 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 */
EXTERN int who_p, who_e; /* caller's proc number, endpoint */
EXTERN int call_nr; /* system call number */
EXTERN message mount_m_in; /* the input message for a mount request */
EXTERN endpoint_t mount_fs_e; /* endpoint of file system to mount */
EXTERN char mount_label[LABEL_MAX]; /* label of file system to mount */
EXTERN char user_fullpath[PATH_MAX+1]; /* storage for user path name */
/* 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 */
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. */