7967177710
'who', indicating caller number in pm and fs and some other servers, has been removed in favour of 'who_e' (endpoint) and 'who_p' (proc nr.). In both PM and FS, isokendpt() convert endpoints to process slot numbers, returning OK if it was a valid and consistent endpoint number. okendpt() does the same but panic()s if it doesn't succeed. (In PM, this is pm_isok..) pm and fs keep their own records of process endpoints in their proc tables, which are needed to make kernel calls about those processes. message field names have changed. fs drivers are endpoints. fs now doesn't try to get out of driver deadlock, as the protocol isn't supposed to let that happen any more. (A warning is printed if ELOCKED is detected though.) fproc[].fp_task (indicating which driver the process is suspended on) became an int. PM and FS now get endpoint numbers of initial boot processes from the kernel. These happen to be the same as the old proc numbers, to let user processes reach them with the old numbers, but FS and PM don't know that. All new processes after INIT, even after the generation number wraps around, get endpoint numbers with generation 1 and higher, so the first instances of the boot processes are the only processes ever to have endpoint numbers in the old proc number range. More return code checks of sys_* functions have been added. IS has become endpoint-aware. Ditched the 'text' and 'data' fields in the kernel dump (which show locations, not sizes, so aren't terribly useful) in favour of the endpoint number. Proc number is still visible. Some other dumps (e.g. dmap, rs) show endpoint numbers now too which got the formatting changed. PM reading segments using rw_seg() has changed - it uses other fields in the message now instead of encoding the segment and process number and fd in the fd field. For that it uses _read_pm() and _write_pm() which to _taskcall()s directly in pm/misc.c. PM now sys_exit()s itself on panic(), instead of sys_abort(). RS also talks in endpoints instead of process numbers.
33 lines
1.5 KiB
C
33 lines
1.5 KiB
C
/* EXTERN should be extern except for the table file */
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#ifdef _TABLE
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#undef EXTERN
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#define EXTERN
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#endif
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/* File System global variables */
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EXTERN struct fproc *fp; /* pointer to caller's fproc struct */
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EXTERN int super_user; /* 1 if caller is super_user, else 0 */
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EXTERN int susp_count; /* number of procs suspended on pipe */
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EXTERN int nr_locks; /* number of locks currently in place */
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EXTERN int reviving; /* number of pipe processes to be revived */
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EXTERN off_t rdahedpos; /* position to read ahead */
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EXTERN struct inode *rdahed_inode; /* pointer to inode to read ahead */
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EXTERN Dev_t root_dev; /* device number of the root device */
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EXTERN time_t boottime; /* time in seconds at system boot */
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/* The parameters of the call are kept here. */
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EXTERN message m_in; /* the input message itself */
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EXTERN message m_out; /* the output message used for reply */
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EXTERN int who_p, who_e; /* caller's proc number, endpoint */
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EXTERN int call_nr; /* system call number */
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EXTERN char user_path[PATH_MAX];/* storage for user path name */
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/* The following variables are used for returning results to the caller. */
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EXTERN int err_code; /* temporary storage for error number */
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EXTERN int rdwt_err; /* status of last disk i/o request */
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/* Data initialized elsewhere. */
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extern _PROTOTYPE (int (*call_vec[]), (void) ); /* sys call table */
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extern char dot1[2]; /* dot1 (&dot1[0]) and dot2 (&dot2[0]) have a special */
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extern char dot2[3]; /* meaning to search_dir: no access permission check. */
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