d1fd04e72a
SYSLIB CHANGES: - SEF framework now supports a new SEF Init request type from RS. 3 different callbacks are available (init_fresh, init_lu, init_restart) to specify initialization code when a service starts fresh, starts after a live update, or restarts. SYSTEM SERVICE CHANGES: - Initialization code for system services is now enclosed in a callback SEF will automatically call at init time. The return code of the callback will tell RS whether the initialization completed successfully. - Each init callback can access information passed by RS to initialize. As of now, each system service has access to the public entries of RS's system process table to gather all the information required to initialize. This design eliminates many existing or potential races at boot time and provides a uniform initialization interface to system services. The same interface will be reused for the upcoming publish/subscribe model to handle dynamic registration / deregistration of system services. VM CHANGES: - Uniform privilege management for all system services. Every service uses the same call mask format. For boot services, VM copies the call mask from init data. For dynamic services, VM still receives the call mask via rs_set_priv call that will be soon replaced by the upcoming publish/subscribe model. RS CHANGES: - The system process table has been reorganized and split into private entries and public entries. Only the latter ones are exposed to system services. - VM call masks are now entirely configured in rs/table.c - RS has now its own slot in the system process table. Only kernel tasks and user processes not included in the boot image are now left out from the system process table. - RS implements the initialization protocol for system services. - For services in the boot image, RS blocks till initialization is complete and panics when failure is reported back. Services are initialized in their order of appearance in the boot image priv table and RS blocks to implements synchronous initialization for every system service having the flag SF_SYNCH_BOOT set. - For services started dynamically, the initialization protocol is implemented as though it were the first ping for the service. In this case, if the system service fails to report back (or reports failure), RS brings the service down rather than trying to restart it.
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/* Global variables used in RS.
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*/
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#ifndef RS_GLO_H
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#define RS_GLO_H
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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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/* The boot image priv table. This table has entries for all system
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* services in the boot image.
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*/
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extern struct boot_image_priv boot_image_priv_table[];
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/* The boot image sys table. This table has entries for system services in
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* the boot image that override default sys properties.
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*/
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extern struct boot_image_sys boot_image_sys_table[];
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/* The boot image dev table. This table has entries for system services in
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* the boot image that support dev properties.
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*/
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extern struct boot_image_dev boot_image_dev_table[];
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/* The system process table. This table only has entries for system
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* services (servers and drivers), and thus is not directly indexed by
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* slot number.
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*/
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EXTERN struct rprocpub rprocpub[NR_SYS_PROCS]; /* public entries */
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EXTERN struct rproc rproc[NR_SYS_PROCS];
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EXTERN struct rproc *rproc_ptr[NR_PROCS]; /* mapping for fast access */
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/* Pipe for detection of exec failures. The pipe is close-on-exec, and
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* no data will be written to the pipe if the exec succeeds. After an
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* exec failure, the slot number is written to the pipe. After each exit,
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* a non-blocking read retrieves the slot number from the pipe.
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*/
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EXTERN int exec_pipe[2];
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/* Global init descriptor. This descriptor holds data to initialize system
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* services.
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*/
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EXTERN sef_init_info_t rinit;
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/* Global update descriptor. This descriptor holds data when a live update
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* is in progress.
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*/
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EXTERN struct rupdate rupdate;
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/* Enable/disable verbose output. */
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EXTERN long rs_verbose;
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#endif /* RS_GLO_H */
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