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Annotation of sys/xfs/xfs_dev.h, Revision 1.1.1.1

1.1       nbrk        1: /*
                      2:  * Copyright (c) 1995 - 2001 Kungliga Tekniska Högskolan
                      3:  * (Royal Institute of Technology, Stockholm, Sweden).
                      4:  * All rights reserved.
                      5:  *
                      6:  * Redistribution and use in source and binary forms, with or without
                      7:  * modification, are permitted provided that the following conditions
                      8:  * are met:
                      9:  *
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  *
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  *
                     17:  * 3. Neither the name of the Institute nor the names of its contributors
                     18:  *    may be used to endorse or promote products derived from this software
                     19:  *    without specific prior written permission.
                     20:  *
                     21:  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
                     22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
                     25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     31:  * SUCH DAMAGE.
                     32:  */
                     33:
                     34: /* $arla: xfs_dev.h,v 1.19 2003/01/19 20:53:52 lha Exp $ */
                     35:
                     36: #ifndef _xfs_dev_h
                     37: #define _xfs_dev_h
                     38:
                     39: /*
                     40:  * Queues of xfs_links hold outbound messages and processes sleeping
                     41:  * for replies. The last field is used to return error to sleepers and
                     42:  * to keep record of memory to be deallocated when messages have been
                     43:  * delivered or dropped.
                     44:  */
                     45:
                     46: struct xfs_link {
                     47:     struct xfs_link *prev, *next;
                     48:     struct xfs_message_header *message;
                     49:     u_int error_or_size;              /* error on sleepq and size on
                     50:                                        * messageq */
                     51: };
                     52:
                     53: struct xfs_channel {
                     54:     struct xfs_link messageq;         /* Messages not yet read */
                     55:     struct xfs_link sleepq;           /* Waiting for reply message */
                     56:     u_int nsequence;
                     57: #ifdef __osf__
                     58:     sel_queue_t sel_q;
                     59: #else
                     60:     struct selinfo selinfo;
                     61: #endif
                     62:     struct xfs_message_header *message_buffer;
                     63:     int status;
                     64: #define CHANNEL_OPENED 0x1
                     65: #define CHANNEL_WAITING 0x2
                     66:     d_thread_t *proc;
                     67: };
                     68:
                     69: extern struct xfs_channel xfs_channel[NNNPFS];
                     70:
                     71: /*
                     72:  * These are variant dependent
                     73:  */
                     74:
                     75: void xfs_select_wakeup(struct xfs_channel *);
                     76:
                     77: int xfs_install_device(void);
                     78: int xfs_uninstall_device(void);
                     79:
                     80: int xfs_install_filesys(void);
                     81: int xfs_may_uninstall_filesys(void);
                     82: int xfs_uninstall_filesys(void);
                     83:
                     84: int xfs_stat_filesys(void);
                     85: int xfs_stat_device(void);
                     86:
                     87: /*
                     88:  * And these should be generic
                     89:  */
                     90:
                     91: void
                     92: xfs_initq(struct xfs_link *q);
                     93:
                     94: int
                     95: xfs_emptyq(const struct xfs_link *q);
                     96:
                     97: int
                     98: xfs_onq(const struct xfs_link *link);
                     99:
                    100: void
                    101: xfs_appendq(struct xfs_link *q, struct xfs_link *p);
                    102:
                    103: void
                    104: xfs_outq(struct xfs_link *p);
                    105:
                    106: int
                    107: xfs_devopen_common(dev_t dev);
                    108:
                    109: #ifndef __osf__ /* XXX - we should do the same for osf */
                    110: int xfs_devopen(dev_t dev, int flag, int devtype, d_thread_t *proc);
                    111: int xfs_devclose(dev_t dev, int flag, int devtype, d_thread_t *proc);
                    112: int xfs_devioctl(dev_t dev, u_long cmd, caddr_t data, int flags,
                    113:                 d_thread_t *p);
                    114: #ifdef HAVE_THREE_ARGUMENT_SELRECORD
                    115: int xfs_devselect(dev_t dev, int which, void *wql, d_thread_t *p);
                    116: #else
                    117: int xfs_devselect(dev_t dev, int which, d_thread_t *p);
                    118: #endif
                    119: int xfs_devpoll(dev_t dev, int events, d_thread_t *p);
                    120: #endif /* ! __osf__ */
                    121:
                    122: int
                    123: xfs_devclose_common(dev_t dev, d_thread_t *p);
                    124:
                    125: int
                    126: xfs_devread(dev_t dev, struct uio * uiop, int ioflag);
                    127:
                    128: int
                    129: xfs_devwrite(dev_t dev, struct uio *uiop, int ioflag);
                    130:
                    131: int
                    132: xfs_message_send(int fd, struct xfs_message_header * message, u_int size);
                    133:
                    134: int
                    135: xfs_message_rpc(int fd, struct xfs_message_header * message, u_int size,
                    136:                d_thread_t *p);
                    137:
                    138: int
                    139: xfs_message_receive(int fd,
                    140:                    struct xfs_message_header *message,
                    141:                    u_int size,
                    142:                    d_thread_t *p);
                    143:
                    144: int
                    145: xfs_message_wakeup(int fd,
                    146:                   struct xfs_message_wakeup *message,
                    147:                   u_int size,
                    148:                   d_thread_t *p);
                    149:
                    150: int
                    151: xfs_message_wakeup_data(int fd,
                    152:                        struct xfs_message_wakeup_data * message,
                    153:                        u_int size,
                    154:                        d_thread_t *p);
                    155:
                    156: int
                    157: xfs_uprintf_device(void);
                    158:
                    159: int
                    160: xfs_is_xfs_dev (dev_t dev);
                    161:
                    162: #endif /* _xfs_dev_h */