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minix/minix/servers/vfs/glo.h

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VFS: replace VFS with AVFS
2012-02-13 16:28:04 +01:00
#ifndef __VFS_GLO_H__
#define __VFS_GLO_H__
Initial revision
2005-04-21 16:53:53 +02:00
/* EXTERN should be extern except for the table file */
#ifdef _TABLE
#undef EXTERN
#define EXTERN
#endif
various coverity-inspired fixes . some strncpy/strcpy to strlcpy conversions . new <minix/param.h> to avoid including other minix headers that have colliding definitions with library and commands code, causing parse warnings . removed some dead code / assignments
2012-07-16 13:17:11 +02:00
#include <minix/param.h>
Initial revision
2005-04-21 16:53:53 +02:00
/* File System global variables */
EXTERN struct fproc *fp; /* pointer to caller's fproc struct */
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 */
VFS: replace VFS with AVFS
2012-02-13 16:28:04 +01:00
EXTERN int sending;
VFS: enable sending control messages
2012-03-30 11:24:44 +02:00
EXTERN int verbose;
Merge of VFS by Balasz Gerofi with Minix trunk.
2006-10-25 15:40:36 +02:00
VFS: replace VFS with AVFS
2012-02-13 16:28:04 +01:00
EXTERN dev_t ROOT_DEV; /* device number of the root device */
Merge of VFS by Balasz Gerofi with Minix trunk.
2006-10-25 15:40:36 +02:00
EXTERN int ROOT_FS_E; /* kernel endpoint of the root FS proc */
system_hz replaces HZ
2008-12-11 15:48:05 +01:00
EXTERN u32_t system_hz; /* system clock frequency. */
Initial revision
2005-04-21 16:53:53 +02:00
/* The parameters of the call are kept here. */
EXTERN message m_in; /* the input message itself */
VFS: replace VFS with AVFS
2012-02-13 16:28:04 +01:00
# define who_p ((int) (fp - fproc))
VFS: worker thread model overhaul The main purpose of this patch is to fix handling of unpause calls from PM while another call is ongoing. The solution to this problem sparked a full revision of the threading model, consisting of a large number of related changes: - all active worker threads are now always associated with a process, and every process has at most one active thread working for it; - the process lock is always held by a process's worker thread; - a process can now have both normal work and postponed PM work associated to it; - timer expiry and non-postponed PM work is done from the main thread; - filp garbage collection is done from a thread associated with VFS; - reboot calls from PM are now done from a thread associated with PM; - the DS events handler is protected from starting multiple threads; - support for a system worker thread has been removed; - the deadlock recovery thread has been replaced by a parameter to the worker_start() function; the number of worker threads has consequently been increased by one; - saving and restoring of global but per-thread variables is now centralized in worker_suspend() and worker_resume(); err_code is now saved and restored in all cases; - the concept of jobs has been removed, and job_m_in now points to a message stored in the worker thread structure instead; - the PM lock has been removed; - the separate exec lock has been replaced by a lock on the VM process, which was already being locked for exec calls anyway; - PM_UNPAUSE is now processed as a postponed PM request, from a thread associated with the target process; - the FP_DROP_WORK flag has been removed, since it is no longer more than just an optimization and only applied to processes operating on a pipe when getting killed; - assignment to "fp" now takes place only when obtaining new work in the main thread or a worker thread, when resuming execution of a thread, and in the special case of exiting processes during reboot; - there are no longer special cases where the yield() call is used to force a thread to run. Change-Id: I7a97b9b95c2450454a9b5318dfa0e6150d4e6858
2013-08-30 14:00:50 +02:00
# define fproc_addr(e) (&fproc[_ENDPOINT_P(e)])
# define who_e (self != NULL ? fp->fp_endpoint : m_in.m_source)
VFS: replace VFS with AVFS
2012-02-13 16:28:04 +01:00
# define call_nr (m_in.m_type)
VFS: store m_out as part of worker thread state There is no need to pass pointers around when there is a structure available that already stores other similar state, such as m_in. Change-Id: I3164c5c55c71f443688103d1f0756c086eb05974
2013-10-29 23:15:15 +01:00
# define job_m_in (self->w_m_in)
# define job_m_out (self->w_m_out)
VFS: make m_in job local By making m_in job local (i.e., each job has its own copy of m_in instead of refering to the global m_in) we don't have to store and restore m_in on every thread yield. This reduces overhead. Moreover, remove the assumption that m_in is preserved. Do_XXX functions have to copy the system call parameters as soon as possible and only pass those copies to other functions. Furthermore, this patch cleans up some code and uses better types in a lot of places.
2012-04-13 14:50:38 +02:00
# define job_call_nr (job_m_in.m_type)
VFS: replace VFS with AVFS
2012-02-13 16:28:04 +01:00
# define super_user (fp->fp_effuid == SU_UID ? 1 : 0)
EXTERN struct worker_thread *self;
EXTERN int deadlock_resolving;
EXTERN mutex_t bsf_lock;/* Global lock for access to block special files */
EXTERN struct worker_thread workers[NR_WTHREADS];
Mount updates: - allow mounting with "none" block device - allow unmounting by mountpoint - make VFS aware of file system process labels - allow m3_ca1 to use the full available message size - use *printf in u/mount(1), as mount(2) uses it already - fix reference leaks for some mount error cases in VFS
2010-01-13 00:08:50 +01:00
EXTERN char mount_label[LABEL_MAX]; /* label of file system to mount */
Merge of VFS by Balasz Gerofi with Minix trunk.
2006-10-25 15:40:36 +02:00
Initial revision
2005-04-21 16:53:53 +02:00
/* The following variables are used for returning results to the caller. */
EXTERN int err_code; /* temporary storage for error number */
/* Data initialized elsewhere. */
Clean up interface to PM and VFS - introduce new call numbers, names, and field aliases; - initialize request messages to zero for all ABI calls; - format callnr.h in the same way as com.h; - redo call tables in both servers; - remove param.h namespace pollution in the servers; - make brk(2) go to VM directly, rather than through PM; - remove obsolete BRK, UTIME, and WAIT calls; - clean up path copying routine in VFS; - move remaining system calls from libminlib to libc; - correct some errno-related mistakes in libc routines. Change-Id: I2d8ec5d061cd7e0b30c51ffd77aa72ebf84e2565
2013-11-04 22:48:08 +01:00
extern int (* const call_vec[])(void);
VFS: replace VFS with AVFS
2012-02-13 16:28:04 +01:00
#endif
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