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