Commit 41176a68 authored by Brian Foster's avatar Brian Foster Committed by Ben Myers
Browse files

xfs: create function to scan and clear EOFBLOCKS inodes 



xfs_inodes_free_eofblocks() implements scanning functionality for
EOFBLOCKS inodes. It uses the AG iterator to walk the tagged inodes
and free post-EOF blocks via the xfs_inode_free_eofblocks() execute
function. The scan can be invoked in best-effort mode or wait
(force) mode.

A best-effort scan (default) handles all inodes that do not have a
dirty cache and we successfully acquire the io lock via trylock. In
wait mode, we continue to cycle through an AG until all inodes are
handled.

Signed-off-by: default avatarBrian Foster <bfoster@redhat.com>
Reviewed-by: default avatarDave Chinner <dchinner@redhat.com>
Reviewed-by: default avatarMark Tinguely <tinguely@sgi.com>
Signed-off-by: default avatarBen Myers <bpm@sgi.com>
parent 40165e27

fs/xfs/xfs_icache.c

+43 −0
Original line number Diff line number Diff line
@@ -1170,6 +1170,49 @@ xfs_reclaim_inodes_count( 
	return reclaimable;

}



STATIC int

xfs_inode_free_eofblocks(

	struct xfs_inode	*ip,

	struct xfs_perag	*pag,

	int			flags,

	void			*args)

{

	int ret;



	if (!xfs_can_free_eofblocks(ip, false)) {

		/* inode could be preallocated or append-only */

		trace_xfs_inode_free_eofblocks_invalid(ip);

		xfs_inode_clear_eofblocks_tag(ip);

		return 0;

	}



	/*

	 * If the mapping is dirty the operation can block and wait for some

	 * time. Unless we are waiting, skip it.

	 */

	if (!(flags & SYNC_WAIT) &&

	    mapping_tagged(VFS_I(ip)->i_mapping, PAGECACHE_TAG_DIRTY))

		return 0;



	ret = xfs_free_eofblocks(ip->i_mount, ip, true);



	/* don't revisit the inode if we're not waiting */

	if (ret == EAGAIN && !(flags & SYNC_WAIT))

		ret = 0;



	return ret;

}



int

xfs_icache_free_eofblocks(

	struct xfs_mount	*mp,

	int			flags)

{

	ASSERT((flags & ~(SYNC_TRYLOCK|SYNC_WAIT)) == 0);

	return xfs_inode_ag_iterator_tag(mp, xfs_inode_free_eofblocks, flags,

					 NULL, XFS_ICI_EOFBLOCKS_TAG);

}



void

xfs_inode_set_eofblocks_tag(

	xfs_inode_t	*ip)

fs/xfs/xfs_icache.h

+1 −0
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ void xfs_inode_set_reclaim_tag(struct xfs_inode *ip); 


void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);

void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);

int xfs_icache_free_eofblocks(struct xfs_mount *, int);



int xfs_sync_inode_grab(struct xfs_inode *ip);

int xfs_inode_ag_iterator(struct xfs_mount *mp,

fs/xfs/xfs_trace.h

+1 −0
Original line number Diff line number Diff line
@@ -589,6 +589,7 @@ DEFINE_INODE_EVENT(xfs_dquot_dqdetach); 


DEFINE_INODE_EVENT(xfs_inode_set_eofblocks_tag);

DEFINE_INODE_EVENT(xfs_inode_clear_eofblocks_tag);

DEFINE_INODE_EVENT(xfs_inode_free_eofblocks_invalid);



DECLARE_EVENT_CLASS(xfs_iref_class,

	TP_PROTO(struct xfs_inode *ip, unsigned long caller_ip),

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