cleanup the inode reclaim path
Merge xfs_iextract and xfs_idestroy into xfs_ireclaim as they are never called individually. Also rewrite most comments in this area as they were severly out of date. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <david@fromorbit.com> Signed-off-by: Niv Sardi <xaiki@sgi.com>
This commit is contained in:
parent
ccd0be6cfc
commit
5cafdeb289
|
@ -450,65 +450,109 @@ xfs_iput_new(
|
||||||
IRELE(ip);
|
IRELE(ip);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* This routine embodies the part of the reclaim code that pulls
|
* This is called free all the memory associated with an inode.
|
||||||
* the inode from the inode hash table and the mount structure's
|
* It must free the inode itself and any buffers allocated for
|
||||||
* inode list.
|
* if_extents/if_data and if_broot. It must also free the lock
|
||||||
* This should only be called from xfs_reclaim().
|
* associated with the inode.
|
||||||
|
*
|
||||||
|
* Note: because we don't initialise everything on reallocation out
|
||||||
|
* of the zone, we must ensure we nullify everything correctly before
|
||||||
|
* freeing the structure.
|
||||||
*/
|
*/
|
||||||
void
|
void
|
||||||
xfs_ireclaim(xfs_inode_t *ip)
|
xfs_ireclaim(
|
||||||
|
struct xfs_inode *ip)
|
||||||
{
|
{
|
||||||
/*
|
struct xfs_mount *mp = ip->i_mount;
|
||||||
* Remove from old hash list and mount list.
|
struct xfs_perag *pag;
|
||||||
*/
|
|
||||||
XFS_STATS_INC(xs_ig_reclaims);
|
XFS_STATS_INC(xs_ig_reclaims);
|
||||||
|
|
||||||
xfs_iextract(ip);
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Here we do a spurious inode lock in order to coordinate with inode
|
* Remove the inode from the per-AG radix tree. It doesn't matter
|
||||||
* cache radix tree lookups. This is because the lookup can reference
|
* if it was never added to it because radix_tree_delete can deal
|
||||||
* the inodes in the cache without taking references. We make that OK
|
* with that case just fine.
|
||||||
* here by ensuring that we wait until the inode is unlocked after the
|
|
||||||
* lookup before we go ahead and free it. We get both the ilock and
|
|
||||||
* the iolock because the code may need to drop the ilock one but will
|
|
||||||
* still hold the iolock.
|
|
||||||
*/
|
*/
|
||||||
xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
|
pag = xfs_get_perag(mp, ip->i_ino);
|
||||||
|
|
||||||
/*
|
|
||||||
* Release dquots (and their references) if any. An inode may escape
|
|
||||||
* xfs_inactive and get here via vn_alloc->vn_reclaim path.
|
|
||||||
*/
|
|
||||||
XFS_QM_DQDETACH(ip->i_mount, ip);
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Free all memory associated with the inode.
|
|
||||||
*/
|
|
||||||
xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
|
|
||||||
xfs_idestroy(ip);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* This routine removes an about-to-be-destroyed inode from
|
|
||||||
* all of the lists in which it is located with the exception
|
|
||||||
* of the behavior chain.
|
|
||||||
*/
|
|
||||||
void
|
|
||||||
xfs_iextract(
|
|
||||||
xfs_inode_t *ip)
|
|
||||||
{
|
|
||||||
xfs_mount_t *mp = ip->i_mount;
|
|
||||||
xfs_perag_t *pag = xfs_get_perag(mp, ip->i_ino);
|
|
||||||
|
|
||||||
write_lock(&pag->pag_ici_lock);
|
write_lock(&pag->pag_ici_lock);
|
||||||
radix_tree_delete(&pag->pag_ici_root, XFS_INO_TO_AGINO(mp, ip->i_ino));
|
radix_tree_delete(&pag->pag_ici_root, XFS_INO_TO_AGINO(mp, ip->i_ino));
|
||||||
write_unlock(&pag->pag_ici_lock);
|
write_unlock(&pag->pag_ici_lock);
|
||||||
xfs_put_perag(mp, pag);
|
xfs_put_perag(mp, pag);
|
||||||
|
|
||||||
mp->m_ireclaims++;
|
/*
|
||||||
|
* Here we do an (almost) spurious inode lock in order to coordinate
|
||||||
|
* with inode cache radix tree lookups. This is because the lookup
|
||||||
|
* can reference the inodes in the cache without taking references.
|
||||||
|
*
|
||||||
|
* We make that OK here by ensuring that we wait until the inode is
|
||||||
|
* unlocked after the lookup before we go ahead and free it. We get
|
||||||
|
* both the ilock and the iolock because the code may need to drop the
|
||||||
|
* ilock one but will still hold the iolock.
|
||||||
|
*/
|
||||||
|
xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
|
||||||
|
/*
|
||||||
|
* Release dquots (and their references) if any.
|
||||||
|
*/
|
||||||
|
XFS_QM_DQDETACH(ip->i_mount, ip);
|
||||||
|
xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
|
||||||
|
|
||||||
|
switch (ip->i_d.di_mode & S_IFMT) {
|
||||||
|
case S_IFREG:
|
||||||
|
case S_IFDIR:
|
||||||
|
case S_IFLNK:
|
||||||
|
xfs_idestroy_fork(ip, XFS_DATA_FORK);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ip->i_afp)
|
||||||
|
xfs_idestroy_fork(ip, XFS_ATTR_FORK);
|
||||||
|
|
||||||
|
#ifdef XFS_INODE_TRACE
|
||||||
|
ktrace_free(ip->i_trace);
|
||||||
|
#endif
|
||||||
|
#ifdef XFS_BMAP_TRACE
|
||||||
|
ktrace_free(ip->i_xtrace);
|
||||||
|
#endif
|
||||||
|
#ifdef XFS_BTREE_TRACE
|
||||||
|
ktrace_free(ip->i_btrace);
|
||||||
|
#endif
|
||||||
|
#ifdef XFS_RW_TRACE
|
||||||
|
ktrace_free(ip->i_rwtrace);
|
||||||
|
#endif
|
||||||
|
#ifdef XFS_ILOCK_TRACE
|
||||||
|
ktrace_free(ip->i_lock_trace);
|
||||||
|
#endif
|
||||||
|
#ifdef XFS_DIR2_TRACE
|
||||||
|
ktrace_free(ip->i_dir_trace);
|
||||||
|
#endif
|
||||||
|
if (ip->i_itemp) {
|
||||||
|
/*
|
||||||
|
* Only if we are shutting down the fs will we see an
|
||||||
|
* inode still in the AIL. If it is there, we should remove
|
||||||
|
* it to prevent a use-after-free from occurring.
|
||||||
|
*/
|
||||||
|
xfs_log_item_t *lip = &ip->i_itemp->ili_item;
|
||||||
|
struct xfs_ail *ailp = lip->li_ailp;
|
||||||
|
|
||||||
|
ASSERT(((lip->li_flags & XFS_LI_IN_AIL) == 0) ||
|
||||||
|
XFS_FORCED_SHUTDOWN(ip->i_mount));
|
||||||
|
if (lip->li_flags & XFS_LI_IN_AIL) {
|
||||||
|
spin_lock(&ailp->xa_lock);
|
||||||
|
if (lip->li_flags & XFS_LI_IN_AIL)
|
||||||
|
xfs_trans_ail_delete(ailp, lip);
|
||||||
|
else
|
||||||
|
spin_unlock(&ailp->xa_lock);
|
||||||
|
}
|
||||||
|
xfs_inode_item_destroy(ip);
|
||||||
|
ip->i_itemp = NULL;
|
||||||
|
}
|
||||||
|
/* asserts to verify all state is correct here */
|
||||||
|
ASSERT(atomic_read(&ip->i_iocount) == 0);
|
||||||
|
ASSERT(atomic_read(&ip->i_pincount) == 0);
|
||||||
|
ASSERT(!spin_is_locked(&ip->i_flags_lock));
|
||||||
|
ASSERT(completion_done(&ip->i_flush));
|
||||||
|
kmem_zone_free(xfs_inode_zone, ip);
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
|
|
@ -2449,78 +2449,6 @@ xfs_idestroy_fork(
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
|
||||||
* This is called free all the memory associated with an inode.
|
|
||||||
* It must free the inode itself and any buffers allocated for
|
|
||||||
* if_extents/if_data and if_broot. It must also free the lock
|
|
||||||
* associated with the inode.
|
|
||||||
*
|
|
||||||
* Note: because we don't initialise everything on reallocation out
|
|
||||||
* of the zone, we must ensure we nullify everything correctly before
|
|
||||||
* freeing the structure.
|
|
||||||
*/
|
|
||||||
void
|
|
||||||
xfs_idestroy(
|
|
||||||
xfs_inode_t *ip)
|
|
||||||
{
|
|
||||||
switch (ip->i_d.di_mode & S_IFMT) {
|
|
||||||
case S_IFREG:
|
|
||||||
case S_IFDIR:
|
|
||||||
case S_IFLNK:
|
|
||||||
xfs_idestroy_fork(ip, XFS_DATA_FORK);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
if (ip->i_afp)
|
|
||||||
xfs_idestroy_fork(ip, XFS_ATTR_FORK);
|
|
||||||
|
|
||||||
#ifdef XFS_INODE_TRACE
|
|
||||||
ktrace_free(ip->i_trace);
|
|
||||||
#endif
|
|
||||||
#ifdef XFS_BMAP_TRACE
|
|
||||||
ktrace_free(ip->i_xtrace);
|
|
||||||
#endif
|
|
||||||
#ifdef XFS_BTREE_TRACE
|
|
||||||
ktrace_free(ip->i_btrace);
|
|
||||||
#endif
|
|
||||||
#ifdef XFS_RW_TRACE
|
|
||||||
ktrace_free(ip->i_rwtrace);
|
|
||||||
#endif
|
|
||||||
#ifdef XFS_ILOCK_TRACE
|
|
||||||
ktrace_free(ip->i_lock_trace);
|
|
||||||
#endif
|
|
||||||
#ifdef XFS_DIR2_TRACE
|
|
||||||
ktrace_free(ip->i_dir_trace);
|
|
||||||
#endif
|
|
||||||
if (ip->i_itemp) {
|
|
||||||
/*
|
|
||||||
* Only if we are shutting down the fs will we see an
|
|
||||||
* inode still in the AIL. If it is there, we should remove
|
|
||||||
* it to prevent a use-after-free from occurring.
|
|
||||||
*/
|
|
||||||
xfs_log_item_t *lip = &ip->i_itemp->ili_item;
|
|
||||||
struct xfs_ail *ailp = lip->li_ailp;
|
|
||||||
|
|
||||||
ASSERT(((lip->li_flags & XFS_LI_IN_AIL) == 0) ||
|
|
||||||
XFS_FORCED_SHUTDOWN(ip->i_mount));
|
|
||||||
if (lip->li_flags & XFS_LI_IN_AIL) {
|
|
||||||
spin_lock(&ailp->xa_lock);
|
|
||||||
if (lip->li_flags & XFS_LI_IN_AIL)
|
|
||||||
xfs_trans_ail_delete(ailp, lip);
|
|
||||||
else
|
|
||||||
spin_unlock(&ailp->xa_lock);
|
|
||||||
}
|
|
||||||
xfs_inode_item_destroy(ip);
|
|
||||||
ip->i_itemp = NULL;
|
|
||||||
}
|
|
||||||
/* asserts to verify all state is correct here */
|
|
||||||
ASSERT(atomic_read(&ip->i_iocount) == 0);
|
|
||||||
ASSERT(atomic_read(&ip->i_pincount) == 0);
|
|
||||||
ASSERT(!spin_is_locked(&ip->i_flags_lock));
|
|
||||||
ASSERT(completion_done(&ip->i_flush));
|
|
||||||
kmem_zone_free(xfs_inode_zone, ip);
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Increment the pin count of the given buffer.
|
* Increment the pin count of the given buffer.
|
||||||
* This value is protected by ipinlock spinlock in the mount structure.
|
* This value is protected by ipinlock spinlock in the mount structure.
|
||||||
|
|
|
@ -529,8 +529,6 @@ int xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
|
||||||
xfs_fsize_t, int, int);
|
xfs_fsize_t, int, int);
|
||||||
int xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
|
int xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
|
||||||
|
|
||||||
void xfs_idestroy(xfs_inode_t *);
|
|
||||||
void xfs_iextract(xfs_inode_t *);
|
|
||||||
void xfs_iext_realloc(xfs_inode_t *, int, int);
|
void xfs_iext_realloc(xfs_inode_t *, int, int);
|
||||||
void xfs_ipin(xfs_inode_t *);
|
void xfs_ipin(xfs_inode_t *);
|
||||||
void xfs_iunpin(xfs_inode_t *);
|
void xfs_iunpin(xfs_inode_t *);
|
||||||
|
|
|
@ -241,7 +241,6 @@ typedef struct xfs_mount {
|
||||||
xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
|
xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
|
||||||
spinlock_t m_agirotor_lock;/* .. and lock protecting it */
|
spinlock_t m_agirotor_lock;/* .. and lock protecting it */
|
||||||
xfs_agnumber_t m_maxagi; /* highest inode alloc group */
|
xfs_agnumber_t m_maxagi; /* highest inode alloc group */
|
||||||
uint m_ireclaims; /* count of calls to reclaim*/
|
|
||||||
uint m_readio_log; /* min read size log bytes */
|
uint m_readio_log; /* min read size log bytes */
|
||||||
uint m_readio_blocks; /* min read size blocks */
|
uint m_readio_blocks; /* min read size blocks */
|
||||||
uint m_writeio_log; /* min write size log bytes */
|
uint m_writeio_log; /* min write size log bytes */
|
||||||
|
|
Loading…
Reference in New Issue