gfs2: Move rs_{sizehint, rgd_gh} fields into the inode

Move the rs_sizehint and rs_rgd_gh fields from struct gfs2_blkreserv
into the inode: they are more closely related to the inode than to a
particular reservation.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Reviewed-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/file.c

@@ -361,8 +361,8 @@ static void gfs2_size_hint(struct file *filep, loff_t offset, size_t size)
 	size_t blks = (size + sdp->sd_sb.sb_bsize - 1) >> sdp->sd_sb.sb_bsize_shift;
 	int hint = min_t(size_t, INT_MAX, blks);
 
-	if (hint > atomic_read(&ip->i_res.rs_sizehint))
-		atomic_set(&ip->i_res.rs_sizehint, hint);
+	if (hint > atomic_read(&ip->i_sizehint))
+		atomic_set(&ip->i_sizehint, hint);
 }
 
 /**

fs/gfs2/incore.h

@@ -309,10 +309,6 @@ struct gfs2_qadata { /* quota allocation data */
 */
 
 struct gfs2_blkreserv {
-	/* components used during write (step 1): */
-	atomic_t rs_sizehint;         /* hint of the write size */
-
-	struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */
 	struct rb_node rs_node;       /* link to other block reservations */
 	struct gfs2_rbm rs_rbm;       /* Start of reservation */
 	u32 rs_free;                  /* how many blocks are still free */
@@ -417,8 +413,10 @@ struct gfs2_inode {
 	struct gfs2_holder i_iopen_gh;
 	struct gfs2_holder i_gh; /* for prepare/commit_write only */
 	struct gfs2_qadata *i_qadata; /* quota allocation data */
+	struct gfs2_holder i_rgd_gh;
 	struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
 	u64 i_goal;	/* goal block for allocations */
+	atomic_t i_sizehint;  /* hint of the write size */
 	struct rw_semaphore i_rw_mutex;
 	struct list_head i_ordered;
 	struct list_head i_trunc_list;

fs/gfs2/main.c

@@ -39,9 +39,11 @@ static void gfs2_init_inode_once(void *foo)
 	struct gfs2_inode *ip = foo;
 
 	inode_init_once(&ip->i_inode);
+	atomic_set(&ip->i_sizehint, 0);
 	init_rwsem(&ip->i_rw_mutex);
 	INIT_LIST_HEAD(&ip->i_trunc_list);
 	ip->i_qadata = NULL;
+	gfs2_holder_mark_uninitialized(&ip->i_rgd_gh);
 	memset(&ip->i_res, 0, sizeof(ip->i_res));
 	RB_CLEAR_NODE(&ip->i_res.rs_node);
 	ip->i_hash_cache = NULL;

fs/gfs2/rgrp.c

@@ -1565,7 +1565,7 @@ static void rg_mblk_search(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip,
 	if (S_ISDIR(inode->i_mode))
 		extlen = 1;
 	else {
-		extlen = max_t(u32, atomic_read(&rs->rs_sizehint), ap->target);
+		extlen = max_t(u32, atomic_read(&ip->i_sizehint), ap->target);
 		extlen = clamp(extlen, RGRP_RSRV_MINBLKS, free_blocks);
 	}
 	if ((rgd->rd_free_clone < rgd->rd_reserved) || (free_blocks < extlen))
@@ -2077,7 +2077,7 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, struct gfs2_alloc_parms *ap)
 			}
 			error = gfs2_glock_nq_init(rs->rs_rbm.rgd->rd_gl,
 						   LM_ST_EXCLUSIVE, flags,
-						   &rs->rs_rgd_gh);
+						   &ip->i_rgd_gh);
 			if (unlikely(error))
 				return error;
 			if (!gfs2_rs_active(rs) && (loops < 2) &&
@@ -2086,7 +2086,7 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, struct gfs2_alloc_parms *ap)
 			if (sdp->sd_args.ar_rgrplvb) {
 				error = update_rgrp_lvb(rs->rs_rbm.rgd);
 				if (unlikely(error)) {
-					gfs2_glock_dq_uninit(&rs->rs_rgd_gh);
+					gfs2_glock_dq_uninit(&ip->i_rgd_gh);
 					return error;
 				}
 			}
@@ -2129,7 +2129,7 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, struct gfs2_alloc_parms *ap)
 
 		/* Unlock rgrp if required */
 		if (!rg_locked)
-			gfs2_glock_dq_uninit(&rs->rs_rgd_gh);
+			gfs2_glock_dq_uninit(&ip->i_rgd_gh);
 next_rgrp:
 		/* Find the next rgrp, and continue looking */
 		if (gfs2_select_rgrp(&rs->rs_rbm.rgd, begin))
@@ -2166,10 +2166,8 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, struct gfs2_alloc_parms *ap)
 
 void gfs2_inplace_release(struct gfs2_inode *ip)
 {
-	struct gfs2_blkreserv *rs = &ip->i_res;
-
-	if (gfs2_holder_initialized(&rs->rs_rgd_gh))
-		gfs2_glock_dq_uninit(&rs->rs_rgd_gh);
+	if (gfs2_holder_initialized(&ip->i_rgd_gh))
+		gfs2_glock_dq_uninit(&ip->i_rgd_gh);
 }
 
 /**
@@ -2328,7 +2326,7 @@ static void gfs2_adjust_reservation(struct gfs2_inode *ip,
 				goto out;
 			/* We used up our block reservation, so we should
 			   reserve more blocks next time. */
-			atomic_add(RGRP_RSRV_ADDBLKS, &rs->rs_sizehint);
+			atomic_add(RGRP_RSRV_ADDBLKS, &ip->i_sizehint);
 		}
 		__rs_deltree(rs);
 	}