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/* Private declarations for fileserver library
Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2006, 2009 Free
Software Foundation, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef DISKFS_PRIV_H
#define DISKFS_PRIV_H
#include <mach.h>
#include <hurd.h>
#include <sys/mman.h>
#include <hurd/ports.h>
#include <hurd/fshelp.h>
#include <hurd/iohelp.h>
#include <hurd/port.h>
#include <assert-backtrace.h>
#include <argp.h>
#include "diskfs.h"
/* These inhibit setuid or exec. */
extern int _diskfs_nosuid, _diskfs_noexec;
/* This relaxes the requirement to set `st_atim'. */
extern int _diskfs_noatime;
/* Will set `st_atim' if it has not been updated in 24 hours or
if `st_ctim' or `st_mtim' are younger than `st_atim'. */
extern int _diskfs_relatime;
/* This enables SysV style group behaviour. New nodes inherit the GID
of the user creating them unless the SGID bit is set of the parent
directory. */
extern int _diskfs_no_inherit_dir_group;
/* This is the -C argument value. */
extern char *_diskfs_chroot_directory;
/* If --boot-command is given, this points to the program and args. */
extern char **_diskfs_boot_command;
/* Port cell holding a cached port to the exec server. */
extern struct hurd_port _diskfs_exec_portcell;
extern const struct argp_option diskfs_common_options[];
/* Option keys for long-only options in diskfs_common_options. */
#define OPT_SUID_OK 600 /* --suid-ok */
#define OPT_EXEC_OK 601 /* --exec-ok */
#define OPT_ATIME 602 /* --atime */
#define OPT_NO_INHERIT_DIR_GROUP 603 /* --no-inherit-dir-group */
#define OPT_INHERIT_DIR_GROUP 604 /* --inherit-dir-group */
/* Common value for diskfs_common_options and diskfs_default_sync_interval. */
#define DEFAULT_SYNC_INTERVAL 30
#define DEFAULT_SYNC_INTERVAL_STRING STRINGIFY(DEFAULT_SYNC_INTERVAL)
#define STRINGIFY(x) STRINGIFY_1(x)
#define STRINGIFY_1(x) #x
/* Diskfs thinks the disk is dirty if this is set. */
extern int _diskfs_diskdirty;
/* Needed for MiG. */
typedef struct protid *protid_t;
typedef struct diskfs_control *control_t;
typedef struct bootinfo *bootinfo_t;
/* Actually read or write a file. The file size must already permit
the requested access. NP is the file to read/write. DATA is a buffer
to write from or fill on read. OFFSET is the absolute address (-1
not permitted here); AMT is the size of the read/write to perform;
DIR is set for writing and clear for reading. The inode must
be locked. If NOTIME is set, then don't update the access or
modify times on the file. */
error_t _diskfs_rdwr_internal (struct node *np, char *data, off_t offset,
size_t *amt, int dir, int notime);
/* Called when we have a real user environment (complete with proc
and auth ports). */
void _diskfs_init_completed (void);
/* Called in a bootstrap filesystem only, to get the privileged ports. */
void _diskfs_boot_privports (void);
/* Clean routine for control port. */
void _diskfs_control_clean (void *);
/* Called when the last hard reference is released. If there are no
links, then request soft references to be dropped. */
void _diskfs_lastref (struct node *np);
/* If the disk is not readonly and noatime is not set, then check relatime
conditions: if either `np->dn_stat.st_mtim.tv_sec' or
`np->dn_stat.st_ctim.tv_sec' is greater than `np->dn_stat.st_atim.tv_sec',
or if the atime is greater than 24 hours old, return true.
*/
int atime_should_update (struct node *np);
/* Number of outstanding PT_CTL ports. */
extern int _diskfs_ncontrol_ports;
/* Lock for _diskfs_ncontrol_ports. */
extern pthread_spinlock_t _diskfs_control_lock;
/* Callback routines for active translator startup */
extern fshelp_fetch_root_callback1_t _diskfs_translator_callback1;
extern fshelp_fetch_root_callback2_t _diskfs_translator_callback2;
/* This macro locks the node associated with PROTID, and then
evaluates the expression OPERATION; then it syncs the inode
(without waiting) and unlocks everything, and then returns
the value `err' (which can be set by OPERATION if desired). */
#define CHANGE_NODE_FIELD(PROTID, OPERATION) \
({ \
error_t err = 0; \
struct node *np; \
\
if (!(PROTID)) \
return EOPNOTSUPP; \
\
if (diskfs_check_readonly ()) \
return EROFS; \
\
np = (PROTID)->po->np; \
\
pthread_mutex_lock (&np->lock); \
(OPERATION); \
if (diskfs_synchronous) \
diskfs_node_update (np, 1); \
pthread_mutex_unlock (&np->lock); \
return err; \
})
/* Bits the user is permitted to set with io_*_openmodes */
#define HONORED_STATE_MODES (O_APPEND|O_ASYNC|O_FSYNC|O_NONBLOCK|O_NOATIME)
/* Bits that are turned off after open */
#define OPENONLY_STATE_MODES \
(O_CREAT|O_EXCL|O_NOLINK|O_NOTRANS|O_NONBLOCK|O_EXLOCK|O_SHLOCK)
#endif
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