3cc092ff06
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.
38 lines
912 B
C
38 lines
912 B
C
/* Includes. */
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#include "../drivers.h"
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#include "../libdriver/driver.h"
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#include <minix/type.h>
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#include <minix/const.h>
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#include <minix/com.h>
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#include <sys/types.h>
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#include <minix/ipc.h>
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/* Constants and types. */
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#define LOG_SIZE (50*1024)
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#define SUSPENDABLE 1
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struct logdevice {
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char log_buffer[LOG_SIZE];
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int log_size, /* no. of bytes in log buffer */
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log_read, /* read mark */
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log_write; /* write mark */
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#if SUSPENDABLE
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int log_proc_nr,
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log_source,
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log_iosize,
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log_revive_alerted,
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log_status; /* proc that is blocking on read */
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vir_bytes log_user_vir_g, log_user_vir_offset;
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int log_safe;
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#endif
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int log_selected, log_select_proc,
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log_select_alerted, log_select_ready_ops;
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};
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/* Function prototypes. */
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_PROTOTYPE( int do_new_kmess, (message *m) );
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_PROTOTYPE( int do_diagnostics, (message *m, int safe) );
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_PROTOTYPE( void log_append, (char *buf, int len) );
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