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. new kernel call sysctl for generic unprivileged system operations;

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now used for printing diagnostic messages through the kernel message
   buffer. this lets processes print diagnostics without sending messages
   to tty and log directly, simplifying the message protocol a lot and
   reducing difficulties with deadlocks and other situations in which
   diagnostics are blackholed (e.g. grants don't work). this makes
   DIAGNOSTICS(_S), ASYN_DIAGNOSTICS and DIAG_REPL obsolete, although tty
   and log still accept the codes for 'old' binaries. This also simplifies
   diagnostics in several servers and drivers - only tty needs its own
   kputc() now.
 . simplifications in vfs, and some effort to get the vnode references
   right (consistent) even during shutdown. m_mounted_on is now NULL
   for root filesystems (!) (the original and new root), a less awkward
   special case than 'm_mounted_on == m_root_node'. root now has exactly
   one reference, to root, if no files are open, just like all other
   filesystems. m_driver_e is unused.
This commit is contained in:
Ben Gras
2009-01-26 17:43:59 +00:00
parent 4984a86f32
commit 3cc092ff06
38 changed files with 243 additions and 531 deletions
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18
include/minix/com.h
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@@ -326,8 +326,9 @@
# define SYS_MAPDMA (KERNEL_CALL + 42) /* sys_mapdma() */
# define SYS_VMCTL (KERNEL_CALL + 43) /* sys_vmctl() */
# define SYS_SYSCTL (KERNEL_CALL + 44) /* sys_sysctl() */
#define NR_SYS_CALLS 44 /* number of system calls */
#define NR_SYS_CALLS 45 /* number of system calls */
/* Pseudo call for use in kernel/table.c. */
#define SYS_ALL_CALLS (NR_SYS_CALLS)
@@ -584,6 +585,13 @@
#define SVMCTL_MRG_WRITE m1_i2 /* MEMREQ_GET reply: writeflag */
#define SVMCTL_MRG_EP m1_i3 /* MEMREQ_GET reply: process */
/* Codes and field names for SYS_SYSCTL. */
#define SYSCTL_CODE m1_i1 /* SYSCTL_CODE_* below */
#define SYSCTL_ARG1 m1_p1
#define SYSCTL_ARG2 m1_i2
#define SYSCTL_CODE_DIAG 1 /* Print diagnostics. */
#define DIAG_BUFSIZE (80*25)
/* Values for SVMCTL_PARAM. */
#define VMCTL_I386_SETCR3 10
#define VMCTL_GET_PAGEFAULT 11
@@ -654,17 +662,17 @@
# define FKEY_FKEYS m2_l1 /* F1-F12 keys pressed */
# define FKEY_SFKEYS m2_l2 /* Shift-F1-F12 keys pressed */
#define DIAG_BASE 0xa00
#define DIAGNOSTICS (DIAG_BASE+1) /* output a string without FS in between */
#define DIAGNOSTICS_S (DIAG_BASE+2) /* grant-based version of DIAGNOSTICS */
#define DIAGNOSTICS_OLD (DIAG_BASE+1) /* output a string without FS in between */
#define DIAGNOSTICS_S_OLD (DIAG_BASE+2) /* grant-based version of DIAGNOSTICS */
# define DIAG_PRINT_BUF_G m1_p1
# define DIAG_BUF_COUNT m1_i1
#define GET_KMESS (DIAG_BASE+3) /* get kmess from TTY */
# define GETKM_PTR m1_p1
#define GET_KMESS_S (DIAG_BASE+4) /* get kmess from TTY */
# define GETKM_GRANT m1_i1
#define ASYN_DIAGNOSTICS (DIAG_BASE+5) /* grant-based, replyless DIAGNOSTICS */
#define ASYN_DIAGNOSTICS_OLD (DIAG_BASE+5) /* grant-based, replyless DIAGNOSTICS */
#define DIAG_REPL (DIAG_BASE+0x80+0) /* reply to DIAGNOSTICS(_S) */
#define DIAG_REPL_OLD (DIAG_BASE+0x80+0) /* reply to DIAGNOSTICS(_S) */
#define PM_BASE 0x900
#define PM_GET_WORK (PM_BASE + 1) /* Get work from PM */

1
include/minix/syslib.h
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@@ -60,6 +60,7 @@ _PROTOTYPE( int sys_vmctl_stacktrace, (endpoint_t who));
_PROTOTYPE( int sys_readbios, (phys_bytes address, void *buf, size_t size));
_PROTOTYPE( int sys_stime, (time_t boottime));
_PROTOTYPE( int sys_sysctl, (int ctl, char *arg1, int arg2));
/* Shorthands for sys_sdevio() system call. */
#define sys_insb(port, proc_nr, buffer, count) \