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[XFS] implement IHOLD/IRELE directly 

Now that all direct calls to VN_HOLD/VN_RELE are gone we can implement
IHOLD/IRELE directly.

For the IHOLD case also replace igrab with a direct increment of i_count
because we are guaranteed to already have a live and referenced inode by
the VFS. Also remove the vn_hold statistic because it's been rather
meaningless for some time with most references done by other callers.

SGI-PV: 981498

SGI-Modid: xfs-linux-melb:xfs-kern:31764a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
This commit is contained in:
Christoph Hellwig 2008-08-13 16:13:45 +10:00 committed by Lachlan McIlroy
parent 0b1f917730
commit 907f49a8f5
3 changed files with 11 additions and 36 deletions
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18
fs/xfs/linux-2.6/xfs_vnode.c
View File

@ -82,24 +82,6 @@ vn_ioerror(
xfs_do_force_shutdown(ip->i_mount, SHUTDOWN_DEVICE_REQ, f, l);
}
/*
* Add a reference to a referenced vnode.
*/
bhv_vnode_t *
vn_hold(
bhv_vnode_t *vp)
{
struct inode *inode;
XFS_STATS_INC(vn_hold);
inode = igrab(vp);
ASSERT(inode);
return vp;
}
#ifdef XFS_INODE_TRACE
/*

26
fs/xfs/linux-2.6/xfs_vnode.h
View File

@ -69,22 +69,18 @@ static inline int vn_count(bhv_vnode_t *vp)
return atomic_read(&vp->i_count);
}
/*
* Vnode reference counting functions (and macros for compatibility).
*/
extern bhv_vnode_t *vn_hold(bhv_vnode_t *);
#define IHOLD(ip) \
do { \
ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
atomic_inc(&(VFS_I(ip)->i_count)); \
xfs_itrace_hold((ip), __FILE__, __LINE__, (inst_t *)__return_address); \
} while (0)
#if defined(XFS_INODE_TRACE)
#define VN_HOLD(vp) \
((void)vn_hold(vp), \
xfs_itrace_hold(XFS_I(vp), __FILE__, __LINE__, (inst_t *)__return_address))
#define VN_RELE(vp) \
(xfs_itrace_rele(XFS_I(vp), __FILE__, __LINE__, (inst_t *)__return_address), \
iput(vp))
#else
#define VN_HOLD(vp) ((void)vn_hold(vp))
#define VN_RELE(vp) (iput(vp))
#endif
#define IRELE(ip) \
do { \
xfs_itrace_rele((ip), __FILE__, __LINE__, (inst_t *)__return_address); \
iput(VFS_I(ip)); \
} while (0)
static inline bhv_vnode_t *vn_grab(bhv_vnode_t *vp)
{

3
fs/xfs/xfs_utils.h
View File

@ -18,9 +18,6 @@
#ifndef __XFS_UTILS_H__
#define __XFS_UTILS_H__
#define IRELE(ip) VN_RELE(VFS_I(ip))
#define IHOLD(ip) VN_HOLD(VFS_I(ip))
extern int xfs_truncate_file(xfs_mount_t *, xfs_inode_t *);
extern int xfs_dir_ialloc(xfs_trans_t **, xfs_inode_t *, mode_t, xfs_nlink_t,
xfs_dev_t, cred_t *, prid_t, int,