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linux/fs/xfs/linux-2.6/xfs_vnode.h
Christoph Hellwig fbf3ce8d8e [XFS] XFS should not be looking at filp reference counts 
A check for file_count is always a bad idea. Linux has the ->release
method to deal with cleanups on last close and ->flush is only for the
very rare case where we want to perform an operation on every drop of a
reference to a file struct.

This patch gets rid of vop_close and surrounding code in favour of simply
doing the page flushing from ->release.

SGI-PV: 966562
SGI-Modid: xfs-linux-melb:xfs-kern:28952a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-07-14 15:37:37 +10:00

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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_VNODE_H__
#define __XFS_VNODE_H__
struct uio;
struct file;
struct bhv_vfs;
struct bhv_vattr;
struct xfs_iomap;
struct attrlist_cursor_kern;
typedef struct dentry bhv_vname_t;
typedef __u64 bhv_vnumber_t;
typedef enum bhv_vflags {
VMODIFIED = 0x08, /* XFS inode state possibly differs */
/* to the Linux inode state. */
VTRUNCATED = 0x40, /* truncated down so flush-on-close */
} bhv_vflags_t;
/*
* MP locking protocols:
* v_flag, v_vfsp VN_LOCK/VN_UNLOCK
*/
typedef struct bhv_vnode {
bhv_vflags_t v_flag; /* vnode flags (see above) */
bhv_vfs_t *v_vfsp; /* ptr to containing VFS */
bhv_vnumber_t v_number; /* in-core vnode number */
bhv_head_t v_bh; /* behavior head */
spinlock_t v_lock; /* VN_LOCK/VN_UNLOCK */
atomic_t v_iocount; /* outstanding I/O count */
#ifdef XFS_VNODE_TRACE
struct ktrace *v_trace; /* trace header structure */
#endif
struct inode v_inode; /* Linux inode */
/* inode MUST be last */
} bhv_vnode_t;
#define VN_ISLNK(vp) S_ISLNK((vp)->v_inode.i_mode)
#define VN_ISREG(vp) S_ISREG((vp)->v_inode.i_mode)
#define VN_ISDIR(vp) S_ISDIR((vp)->v_inode.i_mode)
#define VN_ISCHR(vp) S_ISCHR((vp)->v_inode.i_mode)
#define VN_ISBLK(vp) S_ISBLK((vp)->v_inode.i_mode)
#define VNODE_POSITION_BASE BHV_POSITION_BASE /* chain bottom */
#define VNODE_POSITION_TOP BHV_POSITION_TOP /* chain top */
#define VNODE_POSITION_INVALID BHV_POSITION_INVALID /* invalid pos. num */
typedef enum {
VN_BHV_UNKNOWN, /* not specified */
VN_BHV_XFS, /* xfs */
VN_BHV_DM, /* data migration */
VN_BHV_QM, /* quota manager */
VN_BHV_IO, /* IO path */
VN_BHV_END /* housekeeping end-of-range */
} vn_bhv_t;
#define VNODE_POSITION_XFS (VNODE_POSITION_BASE)
#define VNODE_POSITION_DM (VNODE_POSITION_BASE+10)
#define VNODE_POSITION_QM (VNODE_POSITION_BASE+20)
#define VNODE_POSITION_IO (VNODE_POSITION_BASE+30)
/*
* Macros for dealing with the behavior descriptor inside of the vnode.
*/
#define BHV_TO_VNODE(bdp) ((bhv_vnode_t *)BHV_VOBJ(bdp))
#define BHV_TO_VNODE_NULL(bdp) ((bhv_vnode_t *)BHV_VOBJNULL(bdp))
#define VN_BHV_HEAD(vp) ((bhv_head_t *)(&((vp)->v_bh)))
#define vn_bhv_head_init(bhp,name) bhv_head_init(bhp,name)
#define vn_bhv_remove(bhp,bdp) bhv_remove(bhp,bdp)
/*
* Vnode to Linux inode mapping.
*/
static inline struct bhv_vnode *vn_from_inode(struct inode *inode)
{
return container_of(inode, bhv_vnode_t, v_inode);
}
static inline struct inode *vn_to_inode(struct bhv_vnode *vnode)
{
return &vnode->v_inode;
}
/*
* Values for the vop_rwlock/rwunlock flags parameter.
*/
typedef enum bhv_vrwlock {
VRWLOCK_NONE,
VRWLOCK_READ,
VRWLOCK_WRITE,
VRWLOCK_WRITE_DIRECT,
VRWLOCK_TRY_READ,
VRWLOCK_TRY_WRITE
} bhv_vrwlock_t;
/*
* Return values for bhv_vop_inactive. A return value of
* VN_INACTIVE_NOCACHE implies that the file system behavior
* has disassociated its state and bhv_desc_t from the vnode.
*/
#define VN_INACTIVE_CACHE 0
#define VN_INACTIVE_NOCACHE 1
/*
* Values for the cmd code given to vop_vnode_change.
*/
typedef enum bhv_vchange {
VCHANGE_FLAGS_FRLOCKS = 0,
VCHANGE_FLAGS_ENF_LOCKING = 1,
VCHANGE_FLAGS_TRUNCATED = 2,
VCHANGE_FLAGS_PAGE_DIRTY = 3,
VCHANGE_FLAGS_IOEXCL_COUNT = 4
} bhv_vchange_t;
typedef int (*vop_open_t)(bhv_desc_t *, struct cred *);
typedef ssize_t (*vop_read_t)(bhv_desc_t *, struct kiocb *,
const struct iovec *, unsigned int,
loff_t *, int, struct cred *);
typedef ssize_t (*vop_write_t)(bhv_desc_t *, struct kiocb *,
const struct iovec *, unsigned int,
loff_t *, int, struct cred *);
typedef ssize_t (*vop_splice_read_t)(bhv_desc_t *, struct file *, loff_t *,
struct pipe_inode_info *, size_t, int, int,
struct cred *);
typedef ssize_t (*vop_splice_write_t)(bhv_desc_t *, struct pipe_inode_info *,
struct file *, loff_t *, size_t, int, int,
struct cred *);
typedef int (*vop_ioctl_t)(bhv_desc_t *, struct inode *, struct file *,
int, unsigned int, void __user *);
typedef int (*vop_getattr_t)(bhv_desc_t *, struct bhv_vattr *, int,
struct cred *);
typedef int (*vop_setattr_t)(bhv_desc_t *, struct bhv_vattr *, int,
struct cred *);
typedef int (*vop_access_t)(bhv_desc_t *, int, struct cred *);
typedef int (*vop_lookup_t)(bhv_desc_t *, bhv_vname_t *, bhv_vnode_t **,
int, bhv_vnode_t *, struct cred *);
typedef int (*vop_create_t)(bhv_desc_t *, bhv_vname_t *, struct bhv_vattr *,
bhv_vnode_t **, struct cred *);
typedef int (*vop_remove_t)(bhv_desc_t *, bhv_vname_t *, struct cred *);
typedef int (*vop_link_t)(bhv_desc_t *, bhv_vnode_t *, bhv_vname_t *,
struct cred *);
typedef int (*vop_rename_t)(bhv_desc_t *, bhv_vname_t *, bhv_vnode_t *,
bhv_vname_t *, struct cred *);
typedef int (*vop_mkdir_t)(bhv_desc_t *, bhv_vname_t *, struct bhv_vattr *,
bhv_vnode_t **, struct cred *);
typedef int (*vop_rmdir_t)(bhv_desc_t *, bhv_vname_t *, struct cred *);
typedef int (*vop_readdir_t)(bhv_desc_t *, struct uio *, struct cred *,
int *);
typedef int (*vop_symlink_t)(bhv_desc_t *, bhv_vname_t *, struct bhv_vattr*,
char *, bhv_vnode_t **, struct cred *);
typedef int (*vop_readlink_t)(bhv_desc_t *, struct uio *, int,
struct cred *);
typedef int (*vop_fsync_t)(bhv_desc_t *, int, struct cred *,
xfs_off_t, xfs_off_t);
typedef int (*vop_inactive_t)(bhv_desc_t *, struct cred *);
typedef int (*vop_fid2_t)(bhv_desc_t *, struct fid *);
typedef int (*vop_release_t)(bhv_desc_t *);
typedef int (*vop_rwlock_t)(bhv_desc_t *, bhv_vrwlock_t);
typedef void (*vop_rwunlock_t)(bhv_desc_t *, bhv_vrwlock_t);
typedef int (*vop_bmap_t)(bhv_desc_t *, xfs_off_t, ssize_t, int,
struct xfs_iomap *, int *);
typedef int (*vop_reclaim_t)(bhv_desc_t *);
typedef int (*vop_attr_get_t)(bhv_desc_t *, const char *, char *, int *,
int, struct cred *);
typedef int (*vop_attr_set_t)(bhv_desc_t *, const char *, char *, int,
int, struct cred *);
typedef int (*vop_attr_remove_t)(bhv_desc_t *, const char *,
int, struct cred *);
typedef int (*vop_attr_list_t)(bhv_desc_t *, char *, int, int,
struct attrlist_cursor_kern *, struct cred *);
typedef void (*vop_link_removed_t)(bhv_desc_t *, bhv_vnode_t *, int);
typedef void (*vop_vnode_change_t)(bhv_desc_t *, bhv_vchange_t, __psint_t);
typedef void (*vop_ptossvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
typedef int (*vop_pflushinvalvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
typedef int (*vop_pflushvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t,
uint64_t, int);
typedef int (*vop_iflush_t)(bhv_desc_t *, int);
typedef struct bhv_vnodeops {
bhv_position_t vn_position; /* position within behavior chain */
vop_open_t vop_open;
vop_read_t vop_read;
vop_write_t vop_write;
vop_splice_read_t vop_splice_read;
vop_splice_write_t vop_splice_write;
vop_ioctl_t vop_ioctl;
vop_getattr_t vop_getattr;
vop_setattr_t vop_setattr;
vop_access_t vop_access;
vop_lookup_t vop_lookup;
vop_create_t vop_create;
vop_remove_t vop_remove;
vop_link_t vop_link;
vop_rename_t vop_rename;
vop_mkdir_t vop_mkdir;
vop_rmdir_t vop_rmdir;
vop_readdir_t vop_readdir;
vop_symlink_t vop_symlink;
vop_readlink_t vop_readlink;
vop_fsync_t vop_fsync;
vop_inactive_t vop_inactive;
vop_fid2_t vop_fid2;
vop_rwlock_t vop_rwlock;
vop_rwunlock_t vop_rwunlock;
vop_bmap_t vop_bmap;
vop_reclaim_t vop_reclaim;
vop_attr_get_t vop_attr_get;
vop_attr_set_t vop_attr_set;
vop_attr_remove_t vop_attr_remove;
vop_attr_list_t vop_attr_list;
vop_link_removed_t vop_link_removed;
vop_vnode_change_t vop_vnode_change;
vop_ptossvp_t vop_tosspages;
vop_pflushinvalvp_t vop_flushinval_pages;
vop_pflushvp_t vop_flush_pages;
vop_release_t vop_release;
vop_iflush_t vop_iflush;
} bhv_vnodeops_t;
/*
* Virtual node operations, operating from head bhv.
*/
#define VNHEAD(vp) ((vp)->v_bh.bh_first)
#define VOP(op, vp) (*((bhv_vnodeops_t *)VNHEAD(vp)->bd_ops)->op)
#define bhv_vop_open(vp, cr) VOP(vop_open, vp)(VNHEAD(vp),cr)
#define bhv_vop_read(vp,file,iov,segs,offset,ioflags,cr) \
VOP(vop_read, vp)(VNHEAD(vp),file,iov,segs,offset,ioflags,cr)
#define bhv_vop_write(vp,file,iov,segs,offset,ioflags,cr) \
VOP(vop_write, vp)(VNHEAD(vp),file,iov,segs,offset,ioflags,cr)
#define bhv_vop_splice_read(vp,f,o,pipe,cnt,fl,iofl,cr) \
VOP(vop_splice_read, vp)(VNHEAD(vp),f,o,pipe,cnt,fl,iofl,cr)
#define bhv_vop_splice_write(vp,f,o,pipe,cnt,fl,iofl,cr) \
VOP(vop_splice_write, vp)(VNHEAD(vp),f,o,pipe,cnt,fl,iofl,cr)
#define bhv_vop_bmap(vp,of,sz,rw,b,n) \
VOP(vop_bmap, vp)(VNHEAD(vp),of,sz,rw,b,n)
#define bhv_vop_getattr(vp, vap,f,cr) \
VOP(vop_getattr, vp)(VNHEAD(vp), vap,f,cr)
#define bhv_vop_setattr(vp, vap,f,cr) \
VOP(vop_setattr, vp)(VNHEAD(vp), vap,f,cr)
#define bhv_vop_access(vp, mode,cr) VOP(vop_access, vp)(VNHEAD(vp), mode,cr)
#define bhv_vop_lookup(vp,d,vpp,f,rdir,cr) \
VOP(vop_lookup, vp)(VNHEAD(vp),d,vpp,f,rdir,cr)
#define bhv_vop_create(dvp,d,vap,vpp,cr) \
VOP(vop_create, dvp)(VNHEAD(dvp),d,vap,vpp,cr)
#define bhv_vop_remove(dvp,d,cr) VOP(vop_remove, dvp)(VNHEAD(dvp),d,cr)
#define bhv_vop_link(dvp,fvp,d,cr) VOP(vop_link, dvp)(VNHEAD(dvp),fvp,d,cr)
#define bhv_vop_rename(fvp,fnm,tdvp,tnm,cr) \
VOP(vop_rename, fvp)(VNHEAD(fvp),fnm,tdvp,tnm,cr)
#define bhv_vop_mkdir(dp,d,vap,vpp,cr) \
VOP(vop_mkdir, dp)(VNHEAD(dp),d,vap,vpp,cr)
#define bhv_vop_rmdir(dp,d,cr) VOP(vop_rmdir, dp)(VNHEAD(dp),d,cr)
#define bhv_vop_readdir(vp,uiop,cr,eofp) \
VOP(vop_readdir, vp)(VNHEAD(vp),uiop,cr,eofp)
#define bhv_vop_symlink(dvp,d,vap,tnm,vpp,cr) \
VOP(vop_symlink, dvp)(VNHEAD(dvp),d,vap,tnm,vpp,cr)
#define bhv_vop_readlink(vp,uiop,fl,cr) \
VOP(vop_readlink, vp)(VNHEAD(vp),uiop,fl,cr)
#define bhv_vop_fsync(vp,f,cr,b,e) VOP(vop_fsync, vp)(VNHEAD(vp),f,cr,b,e)
#define bhv_vop_inactive(vp,cr) VOP(vop_inactive, vp)(VNHEAD(vp),cr)
#define bhv_vop_release(vp) VOP(vop_release, vp)(VNHEAD(vp))
#define bhv_vop_fid2(vp,fidp) VOP(vop_fid2, vp)(VNHEAD(vp),fidp)
#define bhv_vop_rwlock(vp,i) VOP(vop_rwlock, vp)(VNHEAD(vp),i)
#define bhv_vop_rwlock_try(vp,i) VOP(vop_rwlock, vp)(VNHEAD(vp),i)
#define bhv_vop_rwunlock(vp,i) VOP(vop_rwunlock, vp)(VNHEAD(vp),i)
#define bhv_vop_frlock(vp,c,fl,flags,offset,fr) \
VOP(vop_frlock, vp)(VNHEAD(vp),c,fl,flags,offset,fr)
#define bhv_vop_reclaim(vp) VOP(vop_reclaim, vp)(VNHEAD(vp))
#define bhv_vop_attr_get(vp, name, val, vallenp, fl, cred) \
VOP(vop_attr_get, vp)(VNHEAD(vp),name,val,vallenp,fl,cred)
#define bhv_vop_attr_set(vp, name, val, vallen, fl, cred) \
VOP(vop_attr_set, vp)(VNHEAD(vp),name,val,vallen,fl,cred)
#define bhv_vop_attr_remove(vp, name, flags, cred) \
VOP(vop_attr_remove, vp)(VNHEAD(vp),name,flags,cred)
#define bhv_vop_attr_list(vp, buf, buflen, fl, cursor, cred) \
VOP(vop_attr_list, vp)(VNHEAD(vp),buf,buflen,fl,cursor,cred)
#define bhv_vop_link_removed(vp, dvp, linkzero) \
VOP(vop_link_removed, vp)(VNHEAD(vp), dvp, linkzero)
#define bhv_vop_vnode_change(vp, cmd, val) \
VOP(vop_vnode_change, vp)(VNHEAD(vp), cmd, val)
#define bhv_vop_toss_pages(vp, first, last, fiopt) \
VOP(vop_tosspages, vp)(VNHEAD(vp), first, last, fiopt)
#define bhv_vop_flushinval_pages(vp, first, last, fiopt) \
VOP(vop_flushinval_pages, vp)(VNHEAD(vp),first,last,fiopt)
#define bhv_vop_flush_pages(vp, first, last, flags, fiopt) \
VOP(vop_flush_pages, vp)(VNHEAD(vp),first,last,flags,fiopt)
#define bhv_vop_ioctl(vp, inode, filp, fl, cmd, arg) \
VOP(vop_ioctl, vp)(VNHEAD(vp),inode,filp,fl,cmd,arg)
#define bhv_vop_iflush(vp, flags) VOP(vop_iflush, vp)(VNHEAD(vp), flags)
/*
* Flags for read/write calls - same values as IRIX
*/
#define IO_ISAIO 0x00001 /* don't wait for completion */
#define IO_ISDIRECT 0x00004 /* bypass page cache */
#define IO_INVIS 0x00020 /* don't update inode timestamps */
/*
* Flags for vop_iflush call
*/
#define FLUSH_SYNC 1 /* wait for flush to complete */
#define FLUSH_INODE 2 /* flush the inode itself */
#define FLUSH_LOG 4 /* force the last log entry for
* this inode out to disk */
/*
* Flush/Invalidate options for vop_toss/flush/flushinval_pages.
*/
#define FI_NONE 0 /* none */
#define FI_REMAPF 1 /* Do a remapf prior to the operation */
#define FI_REMAPF_LOCKED 2 /* Do a remapf prior to the operation.
Prevent VM access to the pages until
the operation completes. */
/*
* Vnode attributes. va_mask indicates those attributes the caller
* wants to set or extract.
*/
typedef struct bhv_vattr {
int va_mask; /* bit-mask of attributes present */
mode_t va_mode; /* file access mode and type */
xfs_nlink_t va_nlink; /* number of references to file */
uid_t va_uid; /* owner user id */
gid_t va_gid; /* owner group id */
xfs_ino_t va_nodeid; /* file id */
xfs_off_t va_size; /* file size in bytes */
u_long va_blocksize; /* blocksize preferred for i/o */
struct timespec va_atime; /* time of last access */
struct timespec va_mtime; /* time of last modification */
struct timespec va_ctime; /* time file changed */
u_int va_gen; /* generation number of file */
xfs_dev_t va_rdev; /* device the special file represents */
__int64_t va_nblocks; /* number of blocks allocated */
u_long va_xflags; /* random extended file flags */
u_long va_extsize; /* file extent size */
u_long va_nextents; /* number of extents in file */
u_long va_anextents; /* number of attr extents in file */
prid_t va_projid; /* project id */
} bhv_vattr_t;
/*
* setattr or getattr attributes
*/
#define XFS_AT_TYPE 0x00000001
#define XFS_AT_MODE 0x00000002
#define XFS_AT_UID 0x00000004
#define XFS_AT_GID 0x00000008
#define XFS_AT_FSID 0x00000010
#define XFS_AT_NODEID 0x00000020
#define XFS_AT_NLINK 0x00000040
#define XFS_AT_SIZE 0x00000080
#define XFS_AT_ATIME 0x00000100
#define XFS_AT_MTIME 0x00000200
#define XFS_AT_CTIME 0x00000400
#define XFS_AT_RDEV 0x00000800
#define XFS_AT_BLKSIZE 0x00001000
#define XFS_AT_NBLOCKS 0x00002000
#define XFS_AT_VCODE 0x00004000
#define XFS_AT_MAC 0x00008000
#define XFS_AT_UPDATIME 0x00010000
#define XFS_AT_UPDMTIME 0x00020000
#define XFS_AT_UPDCTIME 0x00040000
#define XFS_AT_ACL 0x00080000
#define XFS_AT_CAP 0x00100000
#define XFS_AT_INF 0x00200000
#define XFS_AT_XFLAGS 0x00400000
#define XFS_AT_EXTSIZE 0x00800000
#define XFS_AT_NEXTENTS 0x01000000
#define XFS_AT_ANEXTENTS 0x02000000
#define XFS_AT_PROJID 0x04000000
#define XFS_AT_SIZE_NOPERM 0x08000000
#define XFS_AT_GENCOUNT 0x10000000
#define XFS_AT_ALL (XFS_AT_TYPE|XFS_AT_MODE|XFS_AT_UID|XFS_AT_GID|\
XFS_AT_FSID|XFS_AT_NODEID|XFS_AT_NLINK|XFS_AT_SIZE|\
XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME|XFS_AT_RDEV|\
XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_VCODE|XFS_AT_MAC|\
XFS_AT_ACL|XFS_AT_CAP|XFS_AT_INF|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|\
XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_PROJID|XFS_AT_GENCOUNT)
#define XFS_AT_STAT (XFS_AT_TYPE|XFS_AT_MODE|XFS_AT_UID|XFS_AT_GID|\
XFS_AT_FSID|XFS_AT_NODEID|XFS_AT_NLINK|XFS_AT_SIZE|\
XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME|XFS_AT_RDEV|\
XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_PROJID)
#define XFS_AT_TIMES (XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME)
#define XFS_AT_UPDTIMES (XFS_AT_UPDATIME|XFS_AT_UPDMTIME|XFS_AT_UPDCTIME)
#define XFS_AT_NOSET (XFS_AT_NLINK|XFS_AT_RDEV|XFS_AT_FSID|XFS_AT_NODEID|\
XFS_AT_TYPE|XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_VCODE|\
XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_GENCOUNT)
/*
* Modes.
*/
#define VSUID S_ISUID /* set user id on execution */
#define VSGID S_ISGID /* set group id on execution */
#define VSVTX S_ISVTX /* save swapped text even after use */
#define VREAD S_IRUSR /* read, write, execute permissions */
#define VWRITE S_IWUSR
#define VEXEC S_IXUSR
#define MODEMASK S_IALLUGO /* mode bits plus permission bits */
/*
* Check whether mandatory file locking is enabled.
*/
#define MANDLOCK(vp, mode) \
(VN_ISREG(vp) && ((mode) & (VSGID|(VEXEC>>3))) == VSGID)
extern void vn_init(void);
extern bhv_vnode_t *vn_initialize(struct inode *);
extern int vn_revalidate(struct bhv_vnode *);
extern int __vn_revalidate(struct bhv_vnode *, bhv_vattr_t *);
extern void vn_revalidate_core(struct bhv_vnode *, bhv_vattr_t *);
extern void vn_iowait(struct bhv_vnode *vp);
extern void vn_iowake(struct bhv_vnode *vp);
extern void vn_ioerror(struct bhv_vnode *vp, int error, char *f, int l);
static inline int vn_count(struct bhv_vnode *vp)
{
return atomic_read(&vn_to_inode(vp)->i_count);
}
/*
* Vnode reference counting functions (and macros for compatibility).
*/
extern bhv_vnode_t *vn_hold(struct bhv_vnode *);
#if defined(XFS_VNODE_TRACE)
#define VN_HOLD(vp) \
((void)vn_hold(vp), \
vn_trace_hold(vp, __FILE__, __LINE__, (inst_t *)__return_address))
#define VN_RELE(vp) \
(vn_trace_rele(vp, __FILE__, __LINE__, (inst_t *)__return_address), \
iput(vn_to_inode(vp)))
#else
#define VN_HOLD(vp) ((void)vn_hold(vp))
#define VN_RELE(vp) (iput(vn_to_inode(vp)))
#endif
static inline struct bhv_vnode *vn_grab(struct bhv_vnode *vp)
{
struct inode *inode = igrab(vn_to_inode(vp));
return inode ? vn_from_inode(inode) : NULL;
}
/*
* Vname handling macros.
*/
#define VNAME(dentry) ((char *) (dentry)->d_name.name)
#define VNAMELEN(dentry) ((dentry)->d_name.len)
#define VNAME_TO_VNODE(dentry) (vn_from_inode((dentry)->d_inode))
/*
* Vnode spinlock manipulation.
*/
#define VN_LOCK(vp) mutex_spinlock(&(vp)->v_lock)
#define VN_UNLOCK(vp, s) mutex_spinunlock(&(vp)->v_lock, s)
STATIC_INLINE void vn_flagset(struct bhv_vnode *vp, uint flag)
{
spin_lock(&vp->v_lock);
vp->v_flag |= flag;
spin_unlock(&vp->v_lock);
}
STATIC_INLINE uint vn_flagclr(struct bhv_vnode *vp, uint flag)
{
uint cleared;
spin_lock(&vp->v_lock);
cleared = (vp->v_flag & flag);
vp->v_flag &= ~flag;
spin_unlock(&vp->v_lock);
return cleared;
}
#define VMODIFY(vp) vn_flagset(vp, VMODIFIED)
#define VUNMODIFY(vp) vn_flagclr(vp, VMODIFIED)
#define VTRUNCATE(vp) vn_flagset(vp, VTRUNCATED)
#define VUNTRUNCATE(vp) vn_flagclr(vp, VTRUNCATED)
/*
* Dealing with bad inodes
*/
static inline void vn_mark_bad(struct bhv_vnode *vp)
{
make_bad_inode(vn_to_inode(vp));
}
static inline int VN_BAD(struct bhv_vnode *vp)
{
return is_bad_inode(vn_to_inode(vp));
}
/*
* Extracting atime values in various formats
*/
static inline void vn_atime_to_bstime(bhv_vnode_t *vp, xfs_bstime_t *bs_atime)
{
bs_atime->tv_sec = vp->v_inode.i_atime.tv_sec;
bs_atime->tv_nsec = vp->v_inode.i_atime.tv_nsec;
}
static inline void vn_atime_to_timespec(bhv_vnode_t *vp, struct timespec *ts)
{
*ts = vp->v_inode.i_atime;
}
static inline void vn_atime_to_time_t(bhv_vnode_t *vp, time_t *tt)
{
*tt = vp->v_inode.i_atime.tv_sec;
}
/*
* Some useful predicates.
*/
#define VN_MAPPED(vp) mapping_mapped(vn_to_inode(vp)->i_mapping)
#define VN_CACHED(vp) (vn_to_inode(vp)->i_mapping->nrpages)
#define VN_DIRTY(vp) mapping_tagged(vn_to_inode(vp)->i_mapping, \
PAGECACHE_TAG_DIRTY)
#define VN_TRUNC(vp) ((vp)->v_flag & VTRUNCATED)
/*
* Flags to vop_setattr/getattr.
*/
#define ATTR_UTIME 0x01 /* non-default utime(2) request */
#define ATTR_DMI 0x08 /* invocation from a DMI function */
#define ATTR_LAZY 0x80 /* set/get attributes lazily */
#define ATTR_NONBLOCK 0x100 /* return EAGAIN if operation would block */
#define ATTR_NOLOCK 0x200 /* Don't grab any conflicting locks */
#define ATTR_NOSIZETOK 0x400 /* Don't get the SIZE token */
/*
* Flags to vop_fsync/reclaim.
*/
#define FSYNC_NOWAIT 0 /* asynchronous flush */
#define FSYNC_WAIT 0x1 /* synchronous fsync or forced reclaim */
#define FSYNC_INVAL 0x2 /* flush and invalidate cached data */
#define FSYNC_DATA 0x4 /* synchronous fsync of data only */
/*
* Tracking vnode activity.
*/
#if defined(XFS_VNODE_TRACE)
#define VNODE_TRACE_SIZE 16 /* number of trace entries */
#define VNODE_KTRACE_ENTRY 1
#define VNODE_KTRACE_EXIT 2
#define VNODE_KTRACE_HOLD 3
#define VNODE_KTRACE_REF 4
#define VNODE_KTRACE_RELE 5
extern void vn_trace_entry(struct bhv_vnode *, const char *, inst_t *);
extern void vn_trace_exit(struct bhv_vnode *, const char *, inst_t *);
extern void vn_trace_hold(struct bhv_vnode *, char *, int, inst_t *);
extern void vn_trace_ref(struct bhv_vnode *, char *, int, inst_t *);
extern void vn_trace_rele(struct bhv_vnode *, char *, int, inst_t *);
#define VN_TRACE(vp) \
vn_trace_ref(vp, __FILE__, __LINE__, (inst_t *)__return_address)
#else
#define vn_trace_entry(a,b,c)
#define vn_trace_exit(a,b,c)
#define vn_trace_hold(a,b,c,d)
#define vn_trace_ref(a,b,c,d)
#define vn_trace_rele(a,b,c,d)
#define VN_TRACE(vp)
#endif
#endif /* __XFS_VNODE_H__ */
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