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Diffstat (limited to 'fs/xfs/xfs_dmapi.h')
| -rw-r--r-- | fs/xfs/xfs_dmapi.h | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/fs/xfs/xfs_dmapi.h b/fs/xfs/xfs_dmapi.h new file mode 100644 index 000000000000..55ae3e67d245 --- /dev/null +++ b/fs/xfs/xfs_dmapi.h @@ -0,0 +1,212 @@ +/* + * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 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. + * + * Further, this software is distributed without any warranty that it is + * free of the rightful claim of any third person regarding infringement + * or the like. Any license provided herein, whether implied or + * otherwise, applies only to this software file. Patent licenses, if + * any, provided herein do not apply to combinations of this program with + * other software, or any other product whatsoever. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, + * Mountain View, CA 94043, or: + * + * http://www.sgi.com + * + * For further information regarding this notice, see: + * + * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ + */ +#ifndef __XFS_DMAPI_H__ +#define __XFS_DMAPI_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_ISEM 0x004 /* thread holds i_sem */ +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,4,21) +/* i_alloc_sem was added in 2.4.22-pre1 */ +#define DM_FLAGS_IALLOCSEM_RD 0x010 /* thread holds i_alloc_sem rd */ +#define DM_FLAGS_IALLOCSEM_WR 0x020 /* thread holds i_alloc_sem wr */ +#endif +#endif + +/* + * Based on IO_ISDIRECT, decide which i_ flag is set. + */ +#ifdef DM_FLAGS_IALLOCSEM_RD +#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \ + DM_FLAGS_IALLOCSEM_RD : DM_FLAGS_ISEM) +#define DM_SEM_FLAG_WR (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_ISEM) +#else +#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \ + 0 : DM_FLAGS_ISEM) +#define DM_SEM_FLAG_WR (DM_FLAGS_ISEM) +#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__ */ |