331b6cc0ea
Improve support for writing to XFS partitions. Work done by: Russell Cattelan <cattelan at xfs dot org>
199 lines
5.8 KiB
C
199 lines
5.8 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms 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,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_DMAPI_H__
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#define __XFS_DMAPI_H__
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//#include <linux/version.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_IMUX 0x004 /* thread holds i_mutex */
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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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/*
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* Based on IO_ISDIRECT, decide which i_ flag is set.
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*/
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#if 0
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#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
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#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
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DM_FLAGS_IMUX : 0)
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#define DM_SEM_FLAG_WR (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_IMUX)
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#endif
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#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)) && \
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(LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,22))
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#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
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DM_FLAGS_IALLOCSEM_RD : DM_FLAGS_IMUX)
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#define DM_SEM_FLAG_WR (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_IMUX)
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#endif
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#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,21)
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#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
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0 : DM_FLAGS_IMUX)
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#define DM_SEM_FLAG_WR (DM_FLAGS_IMUX)
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#endif
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#endif
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#define DM_SEM_FLAG_WR 0 /* RMC */
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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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#endif /* __XFS_DMAPI_H__ */
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