1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
213 lines
6.4 KiB
C
213 lines
6.4 KiB
C
/*
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* Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
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*/
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#ifndef __XFS_DMAPI_H__
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#define __XFS_DMAPI_H__
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/* Values used to define the on-disk version of dm_attrname_t. All
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* on-disk attribute names start with the 8-byte string "SGI_DMI_".
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*
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* In the on-disk inode, DMAPI attribute names consist of the user-provided
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* name with the DMATTR_PREFIXSTRING pre-pended. This string must NEVER be
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* changed.
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*/
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#define DMATTR_PREFIXLEN 8
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#define DMATTR_PREFIXSTRING "SGI_DMI_"
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typedef enum {
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DM_EVENT_INVALID = -1,
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DM_EVENT_CANCEL = 0, /* not supported */
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DM_EVENT_MOUNT = 1,
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DM_EVENT_PREUNMOUNT = 2,
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DM_EVENT_UNMOUNT = 3,
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DM_EVENT_DEBUT = 4, /* not supported */
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DM_EVENT_CREATE = 5,
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DM_EVENT_CLOSE = 6, /* not supported */
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DM_EVENT_POSTCREATE = 7,
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DM_EVENT_REMOVE = 8,
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DM_EVENT_POSTREMOVE = 9,
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DM_EVENT_RENAME = 10,
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DM_EVENT_POSTRENAME = 11,
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DM_EVENT_LINK = 12,
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DM_EVENT_POSTLINK = 13,
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DM_EVENT_SYMLINK = 14,
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DM_EVENT_POSTSYMLINK = 15,
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DM_EVENT_READ = 16,
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DM_EVENT_WRITE = 17,
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DM_EVENT_TRUNCATE = 18,
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DM_EVENT_ATTRIBUTE = 19,
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DM_EVENT_DESTROY = 20,
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DM_EVENT_NOSPACE = 21,
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DM_EVENT_USER = 22,
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DM_EVENT_MAX = 23
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} dm_eventtype_t;
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#define HAVE_DM_EVENTTYPE_T
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typedef enum {
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DM_RIGHT_NULL,
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DM_RIGHT_SHARED,
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DM_RIGHT_EXCL
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} dm_right_t;
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#define HAVE_DM_RIGHT_T
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/* Defines for determining if an event message should be sent. */
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#define DM_EVENT_ENABLED(vfsp, ip, event) ( \
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unlikely ((vfsp)->vfs_flag & VFS_DMI) && \
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( ((ip)->i_d.di_dmevmask & (1 << event)) || \
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((ip)->i_mount->m_dmevmask & (1 << event)) ) \
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)
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#define DM_EVENT_ENABLED_IO(vfsp, io, event) ( \
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unlikely ((vfsp)->vfs_flag & VFS_DMI) && \
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( ((io)->io_dmevmask & (1 << event)) || \
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((io)->io_mount->m_dmevmask & (1 << event)) ) \
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)
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#define DM_XFS_VALID_FS_EVENTS ( \
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(1 << DM_EVENT_PREUNMOUNT) | \
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(1 << DM_EVENT_UNMOUNT) | \
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(1 << DM_EVENT_NOSPACE) | \
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(1 << DM_EVENT_DEBUT) | \
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(1 << DM_EVENT_CREATE) | \
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(1 << DM_EVENT_POSTCREATE) | \
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(1 << DM_EVENT_REMOVE) | \
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(1 << DM_EVENT_POSTREMOVE) | \
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(1 << DM_EVENT_RENAME) | \
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(1 << DM_EVENT_POSTRENAME) | \
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(1 << DM_EVENT_LINK) | \
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(1 << DM_EVENT_POSTLINK) | \
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(1 << DM_EVENT_SYMLINK) | \
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(1 << DM_EVENT_POSTSYMLINK) | \
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(1 << DM_EVENT_ATTRIBUTE) | \
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(1 << DM_EVENT_DESTROY) )
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/* Events valid in dm_set_eventlist() when called with a file handle for
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a regular file or a symlink. These events are persistent.
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*/
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#define DM_XFS_VALID_FILE_EVENTS ( \
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(1 << DM_EVENT_ATTRIBUTE) | \
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(1 << DM_EVENT_DESTROY) )
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/* Events valid in dm_set_eventlist() when called with a file handle for
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a directory. These events are persistent.
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*/
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#define DM_XFS_VALID_DIRECTORY_EVENTS ( \
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(1 << DM_EVENT_CREATE) | \
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(1 << DM_EVENT_POSTCREATE) | \
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(1 << DM_EVENT_REMOVE) | \
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(1 << DM_EVENT_POSTREMOVE) | \
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(1 << DM_EVENT_RENAME) | \
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(1 << DM_EVENT_POSTRENAME) | \
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(1 << DM_EVENT_LINK) | \
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(1 << DM_EVENT_POSTLINK) | \
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(1 << DM_EVENT_SYMLINK) | \
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(1 << DM_EVENT_POSTSYMLINK) | \
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(1 << DM_EVENT_ATTRIBUTE) | \
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(1 << DM_EVENT_DESTROY) )
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/* Events supported by the XFS filesystem. */
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#define DM_XFS_SUPPORTED_EVENTS ( \
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(1 << DM_EVENT_MOUNT) | \
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(1 << DM_EVENT_PREUNMOUNT) | \
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(1 << DM_EVENT_UNMOUNT) | \
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(1 << DM_EVENT_NOSPACE) | \
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(1 << DM_EVENT_CREATE) | \
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(1 << DM_EVENT_POSTCREATE) | \
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(1 << DM_EVENT_REMOVE) | \
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(1 << DM_EVENT_POSTREMOVE) | \
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(1 << DM_EVENT_RENAME) | \
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(1 << DM_EVENT_POSTRENAME) | \
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(1 << DM_EVENT_LINK) | \
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(1 << DM_EVENT_POSTLINK) | \
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(1 << DM_EVENT_SYMLINK) | \
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(1 << DM_EVENT_POSTSYMLINK) | \
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(1 << DM_EVENT_READ) | \
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(1 << DM_EVENT_WRITE) | \
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(1 << DM_EVENT_TRUNCATE) | \
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(1 << DM_EVENT_ATTRIBUTE) | \
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(1 << DM_EVENT_DESTROY) )
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/*
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* Definitions used for the flags field on dm_send_*_event().
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*/
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#define DM_FLAGS_NDELAY 0x001 /* return EAGAIN after dm_pending() */
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#define DM_FLAGS_UNWANTED 0x002 /* event not in fsys dm_eventset_t */
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#define DM_FLAGS_ISEM 0x004 /* thread holds i_sem */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
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#if LINUX_VERSION_CODE > KERNEL_VERSION(2,4,21)
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/* i_alloc_sem was added in 2.4.22-pre1 */
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#define DM_FLAGS_IALLOCSEM_RD 0x010 /* thread holds i_alloc_sem rd */
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#define DM_FLAGS_IALLOCSEM_WR 0x020 /* thread holds i_alloc_sem wr */
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#endif
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#endif
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/*
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* Based on IO_ISDIRECT, decide which i_ flag is set.
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*/
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#ifdef DM_FLAGS_IALLOCSEM_RD
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#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
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DM_FLAGS_IALLOCSEM_RD : DM_FLAGS_ISEM)
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#define DM_SEM_FLAG_WR (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_ISEM)
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#else
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#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
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0 : DM_FLAGS_ISEM)
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#define DM_SEM_FLAG_WR (DM_FLAGS_ISEM)
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#endif
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/*
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* Macros to turn caller specified delay/block flags into
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* dm_send_xxxx_event flag DM_FLAGS_NDELAY.
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*/
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#define FILP_DELAY_FLAG(filp) ((filp->f_flags&(O_NDELAY|O_NONBLOCK)) ? \
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DM_FLAGS_NDELAY : 0)
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#define AT_DELAY_FLAG(f) ((f&ATTR_NONBLOCK) ? DM_FLAGS_NDELAY : 0)
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extern struct bhv_vfsops xfs_dmops;
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#ifdef CONFIG_XFS_DMAPI
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void xfs_dm_init(struct file_system_type *);
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void xfs_dm_exit(struct file_system_type *);
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#define XFS_DM_INIT(fstype) xfs_dm_init(fstype)
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#define XFS_DM_EXIT(fstype) xfs_dm_exit(fstype)
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#else
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#define XFS_DM_INIT(fstype)
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#define XFS_DM_EXIT(fstype)
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#endif
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#endif /* __XFS_DMAPI_H__ */
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