/* * 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_module_vfsops xfs_dmops; #endif /* __XFS_DMAPI_H__ */