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linux-stable/fs/xfs/linux-2.6/xfs_vnode.h
David Chinner 978b723712 [XFS] Fix fsync() b0rkage. 
xfs_fsync() fails to wait for data I/O completion before checking if the
inode is dirty or clean to decide whether to log the inode or not. This
misses inode size updates when the data flushed by the fsync() is
extending the file.

Hence, like fdatasync(), we need to wait for I/o completion first, then
check the inode for cleanliness. Doing so makes the behaviour of
xfs_fsync() identical for fsync and fdatasync and we *always* use
synchronous semantics if the inode is dirty. Therefore also kill the
differences and remove the unused flags from the xfs_fsync function and
callers.

SGI-PV: 981296
SGI-Modid: xfs-linux-melb:xfs-kern:31033a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
2008-05-23 15:25:25 +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 file;
struct bhv_vattr;
struct xfs_iomap;
struct attrlist_cursor_kern;
typedef struct inode bhv_vnode_t;
/*
* Vnode to Linux inode mapping.
*/
static inline bhv_vnode_t *vn_from_inode(struct inode *inode)
{
return inode;
}
static inline struct inode *vn_to_inode(bhv_vnode_t *vnode)
{
return vnode;
}
/*
* Return values for xfs_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
/*
* 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 xfs_inode_flush
*/
#define FLUSH_SYNC 1 /* wait for flush to complete */
/*
* 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)
extern void vn_init(void);
extern int vn_revalidate(bhv_vnode_t *);
/*
* Yeah, these don't take vnode anymore at all, all this should be
* cleaned up at some point.
*/
extern void vn_iowait(struct xfs_inode *ip);
extern void vn_iowake(struct xfs_inode *ip);
extern void vn_ioerror(struct xfs_inode *ip, int error, char *f, int l);
static inline int vn_count(bhv_vnode_t *vp)
{
return atomic_read(&vn_to_inode(vp)->i_count);
}
/*
* Vnode reference counting functions (and macros for compatibility).
*/
extern bhv_vnode_t *vn_hold(bhv_vnode_t *);
#if defined(XFS_INODE_TRACE)
#define VN_HOLD(vp) \
((void)vn_hold(vp), \
xfs_itrace_hold(xfs_vtoi(vp), __FILE__, __LINE__, (inst_t *)__return_address))
#define VN_RELE(vp) \
(xfs_itrace_rele(xfs_vtoi(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 bhv_vnode_t *vn_grab(bhv_vnode_t *vp)
{
struct inode *inode = igrab(vn_to_inode(vp));
return inode ? vn_from_inode(inode) : NULL;
}
/*
* Dealing with bad inodes
*/
static inline int VN_BAD(bhv_vnode_t *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->i_atime.tv_sec;
bs_atime->tv_nsec = vp->i_atime.tv_nsec;
}
static inline void vn_atime_to_timespec(bhv_vnode_t *vp, struct timespec *ts)
{
*ts = vp->i_atime;
}
static inline void vn_atime_to_time_t(bhv_vnode_t *vp, time_t *tt)
{
*tt = vp->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)
/*
* 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 */
/*
* Tracking vnode activity.
*/
#if defined(XFS_INODE_TRACE)
#define INODE_TRACE_SIZE 16 /* number of trace entries */
#define INODE_KTRACE_ENTRY 1
#define INODE_KTRACE_EXIT 2
#define INODE_KTRACE_HOLD 3
#define INODE_KTRACE_REF 4
#define INODE_KTRACE_RELE 5
extern void _xfs_itrace_entry(struct xfs_inode *, const char *, inst_t *);
extern void _xfs_itrace_exit(struct xfs_inode *, const char *, inst_t *);
extern void xfs_itrace_hold(struct xfs_inode *, char *, int, inst_t *);
extern void _xfs_itrace_ref(struct xfs_inode *, char *, int, inst_t *);
extern void xfs_itrace_rele(struct xfs_inode *, char *, int, inst_t *);
#define xfs_itrace_entry(ip) \
_xfs_itrace_entry(ip, __func__, (inst_t *)__return_address)
#define xfs_itrace_exit(ip) \
_xfs_itrace_exit(ip, __func__, (inst_t *)__return_address)
#define xfs_itrace_exit_tag(ip, tag) \
_xfs_itrace_exit(ip, tag, (inst_t *)__return_address)
#define xfs_itrace_ref(ip) \
_xfs_itrace_ref(ip, __FILE__, __LINE__, (inst_t *)__return_address)
#else
#define xfs_itrace_entry(a)
#define xfs_itrace_exit(a)
#define xfs_itrace_exit_tag(a, b)
#define xfs_itrace_hold(a, b, c, d)
#define xfs_itrace_ref(a)
#define xfs_itrace_rele(a, b, c, d)
#endif
#endif /* __XFS_VNODE_H__ */
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