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linux/fs/xfs/xfs_dmapi.h
Jes Sorensen 1b1dcc1b57 [PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem 
This patch converts the inode semaphore to a mutex. I have tested it on
XFS and compiled as much as one can consider on an ia64. Anyway your
luck with it might be different.

Modified-by: Ingo Molnar <mingo@elte.hu>

(finished the conversion)

Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2006-01-09 15:59:24 -08:00

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/*
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* 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.
*
* This program is distributed in the hope that it would 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 the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __XFS_DMAPI_H__
#define __XFS_DMAPI_H__
#include <linux/version.h>
/* Values used to define the on-disk version of dm_attrname_t. All
* on-disk attribute names start with the 8-byte string "SGI_DMI_".
*
* In the on-disk inode, DMAPI attribute names consist of the user-provided
* name with the DMATTR_PREFIXSTRING pre-pended. This string must NEVER be
* changed.
*/
#define DMATTR_PREFIXLEN 8
#define DMATTR_PREFIXSTRING "SGI_DMI_"
typedef enum {
DM_EVENT_INVALID = -1,
DM_EVENT_CANCEL = 0, /* not supported */
DM_EVENT_MOUNT = 1,
DM_EVENT_PREUNMOUNT = 2,
DM_EVENT_UNMOUNT = 3,
DM_EVENT_DEBUT = 4, /* not supported */
DM_EVENT_CREATE = 5,
DM_EVENT_CLOSE = 6, /* not supported */
DM_EVENT_POSTCREATE = 7,
DM_EVENT_REMOVE = 8,
DM_EVENT_POSTREMOVE = 9,
DM_EVENT_RENAME = 10,
DM_EVENT_POSTRENAME = 11,
DM_EVENT_LINK = 12,
DM_EVENT_POSTLINK = 13,
DM_EVENT_SYMLINK = 14,
DM_EVENT_POSTSYMLINK = 15,
DM_EVENT_READ = 16,
DM_EVENT_WRITE = 17,
DM_EVENT_TRUNCATE = 18,
DM_EVENT_ATTRIBUTE = 19,
DM_EVENT_DESTROY = 20,
DM_EVENT_NOSPACE = 21,
DM_EVENT_USER = 22,
DM_EVENT_MAX = 23
} dm_eventtype_t;
#define HAVE_DM_EVENTTYPE_T
typedef enum {
DM_RIGHT_NULL,
DM_RIGHT_SHARED,
DM_RIGHT_EXCL
} dm_right_t;
#define HAVE_DM_RIGHT_T
/* Defines for determining if an event message should be sent. */
#define DM_EVENT_ENABLED(vfsp, ip, event) ( \
unlikely ((vfsp)->vfs_flag & VFS_DMI) && \
( ((ip)->i_d.di_dmevmask & (1 << event)) || \
((ip)->i_mount->m_dmevmask & (1 << event)) ) \
)
#define DM_EVENT_ENABLED_IO(vfsp, io, event) ( \
unlikely ((vfsp)->vfs_flag & VFS_DMI) && \
( ((io)->io_dmevmask & (1 << event)) || \
((io)->io_mount->m_dmevmask & (1 << event)) ) \
)
#define DM_XFS_VALID_FS_EVENTS ( \
(1 << DM_EVENT_PREUNMOUNT) | \
(1 << DM_EVENT_UNMOUNT) | \
(1 << DM_EVENT_NOSPACE) | \
(1 << DM_EVENT_DEBUT) | \
(1 << DM_EVENT_CREATE) | \
(1 << DM_EVENT_POSTCREATE) | \
(1 << DM_EVENT_REMOVE) | \
(1 << DM_EVENT_POSTREMOVE) | \
(1 << DM_EVENT_RENAME) | \
(1 << DM_EVENT_POSTRENAME) | \
(1 << DM_EVENT_LINK) | \
(1 << DM_EVENT_POSTLINK) | \
(1 << DM_EVENT_SYMLINK) | \
(1 << DM_EVENT_POSTSYMLINK) | \
(1 << DM_EVENT_ATTRIBUTE) | \
(1 << DM_EVENT_DESTROY) )
/* Events valid in dm_set_eventlist() when called with a file handle for
a regular file or a symlink. These events are persistent.
*/
#define DM_XFS_VALID_FILE_EVENTS ( \
(1 << DM_EVENT_ATTRIBUTE) | \
(1 << DM_EVENT_DESTROY) )
/* Events valid in dm_set_eventlist() when called with a file handle for
a directory. These events are persistent.
*/
#define DM_XFS_VALID_DIRECTORY_EVENTS ( \
(1 << DM_EVENT_CREATE) | \
(1 << DM_EVENT_POSTCREATE) | \
(1 << DM_EVENT_REMOVE) | \
(1 << DM_EVENT_POSTREMOVE) | \
(1 << DM_EVENT_RENAME) | \
(1 << DM_EVENT_POSTRENAME) | \
(1 << DM_EVENT_LINK) | \
(1 << DM_EVENT_POSTLINK) | \
(1 << DM_EVENT_SYMLINK) | \
(1 << DM_EVENT_POSTSYMLINK) | \
(1 << DM_EVENT_ATTRIBUTE) | \
(1 << DM_EVENT_DESTROY) )
/* Events supported by the XFS filesystem. */
#define DM_XFS_SUPPORTED_EVENTS ( \
(1 << DM_EVENT_MOUNT) | \
(1 << DM_EVENT_PREUNMOUNT) | \
(1 << DM_EVENT_UNMOUNT) | \
(1 << DM_EVENT_NOSPACE) | \
(1 << DM_EVENT_CREATE) | \
(1 << DM_EVENT_POSTCREATE) | \
(1 << DM_EVENT_REMOVE) | \
(1 << DM_EVENT_POSTREMOVE) | \
(1 << DM_EVENT_RENAME) | \
(1 << DM_EVENT_POSTRENAME) | \
(1 << DM_EVENT_LINK) | \
(1 << DM_EVENT_POSTLINK) | \
(1 << DM_EVENT_SYMLINK) | \
(1 << DM_EVENT_POSTSYMLINK) | \
(1 << DM_EVENT_READ) | \
(1 << DM_EVENT_WRITE) | \
(1 << DM_EVENT_TRUNCATE) | \
(1 << DM_EVENT_ATTRIBUTE) | \
(1 << DM_EVENT_DESTROY) )
/*
* Definitions used for the flags field on dm_send_*_event().
*/
#define DM_FLAGS_NDELAY 0x001 /* return EAGAIN after dm_pending() */
#define DM_FLAGS_UNWANTED 0x002 /* event not in fsys dm_eventset_t */
#define DM_FLAGS_IMUX 0x004 /* thread holds i_mutex */
#define DM_FLAGS_IALLOCSEM_RD 0x010 /* thread holds i_alloc_sem rd */
#define DM_FLAGS_IALLOCSEM_WR 0x020 /* thread holds i_alloc_sem wr */
/*
* Based on IO_ISDIRECT, decide which i_ flag is set.
*/
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
DM_FLAGS_IMUX : 0)
#define DM_SEM_FLAG_WR (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_IMUX)
#endif
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)) && \
(LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,22))
#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
DM_FLAGS_IALLOCSEM_RD : DM_FLAGS_IMUX)
#define DM_SEM_FLAG_WR (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_IMUX)
#endif
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,21)
#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
0 : DM_FLAGS_IMUX)
#define DM_SEM_FLAG_WR (DM_FLAGS_IMUX)
#endif
/*
* Macros to turn caller specified delay/block flags into
* dm_send_xxxx_event flag DM_FLAGS_NDELAY.
*/
#define FILP_DELAY_FLAG(filp) ((filp->f_flags&(O_NDELAY|O_NONBLOCK)) ? \
DM_FLAGS_NDELAY : 0)
#define AT_DELAY_FLAG(f) ((f&ATTR_NONBLOCK) ? DM_FLAGS_NDELAY : 0)
extern struct bhv_vfsops xfs_dmops;
#ifdef CONFIG_XFS_DMAPI
void xfs_dm_init(struct file_system_type *);
void xfs_dm_exit(struct file_system_type *);
#define XFS_DM_INIT(fstype) xfs_dm_init(fstype)
#define XFS_DM_EXIT(fstype) xfs_dm_exit(fstype)
#else
#define XFS_DM_INIT(fstype)
#define XFS_DM_EXIT(fstype)
#endif
#endif /* __XFS_DMAPI_H__ */
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