This time we have a couple of bug fixes, one relating to bad i_goal values

which are now ignored (i_goal is basically a hint so it is safe to so this)
 and another relating to the saving of the dirent location during rename.
 
 There is one performance improvement, which is an optimisation in rgblk_free
 so that multiple block deallocations will now be more efficient,
 and one clean up patch to use _RET_IP_ rather than writing it out longhand.
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Merge tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw

Pull gfs2 updates from Steven Whitehouse:
 "This time we have a couple of bug fixes, one relating to bad i_goal
  values which are now ignored (i_goal is basically a hint so it is safe
  to so this) and another relating to the saving of the dirent location
  during rename.

  There is one performance improvement, which is an optimisation in
  rgblk_free so that multiple block deallocations will now be more
  efficient, and one clean up patch to use _RET_IP_ rather than writing
  it out longhand"

* tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw:
  GFS2: use _RET_IP_ instead of (unsigned long)__builtin_return_address(0)
  GFS2: Use gfs2_rbm_incr in rgblk_free
  GFS2: Make rename not save dirent location
  GFS2: fix bad inode i_goal values during block allocation

fs/gfs2/dir.c

@@ -2100,8 +2100,13 @@ int gfs2_diradd_alloc_required(struct inode *inode, const struct qstr *name,
 	}
 	if (IS_ERR(dent))
 		return PTR_ERR(dent);
-	da->bh = bh;
-	da->dent = dent;
+
+	if (da->save_loc) {
+		da->bh = bh;
+		da->dent = dent;
+	} else {
+		brelse(bh);
+	}
 	return 0;
 }
 

fs/gfs2/dir.h

@@ -23,6 +23,7 @@ struct gfs2_diradd {
 	unsigned nr_blocks;
 	struct gfs2_dirent *dent;
 	struct buffer_head *bh;
+	int save_loc;
 };
 
 extern struct inode *gfs2_dir_search(struct inode *dir,

fs/gfs2/glock.c

@@ -811,7 +811,7 @@ void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state, unsigned flags,
 {
 	INIT_LIST_HEAD(&gh->gh_list);
 	gh->gh_gl = gl;
-	gh->gh_ip = (unsigned long)__builtin_return_address(0);
+	gh->gh_ip = _RET_IP_;
 	gh->gh_owner_pid = get_pid(task_pid(current));
 	gh->gh_state = state;
 	gh->gh_flags = flags;
@@ -835,7 +835,7 @@ void gfs2_holder_reinit(unsigned int state, unsigned flags, struct gfs2_holder *
 	gh->gh_state = state;
 	gh->gh_flags = flags;
 	gh->gh_iflags = 0;
-	gh->gh_ip = (unsigned long)__builtin_return_address(0);
+	gh->gh_ip = _RET_IP_;
 	if (gh->gh_owner_pid)
 		put_pid(gh->gh_owner_pid);
 	gh->gh_owner_pid = get_pid(task_pid(current));

fs/gfs2/glops.c

@@ -93,7 +93,7 @@ static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
          * tr->alloced is not set since the transaction structure is
          * on the stack */
 	tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes, sizeof(u64));
-	tr.tr_ip = (unsigned long)__builtin_return_address(0);
+	tr.tr_ip = _RET_IP_;
 	sb_start_intwrite(sdp->sd_vfs);
 	if (gfs2_log_reserve(sdp, tr.tr_reserved) < 0) {
 		sb_end_intwrite(sdp->sd_vfs);

fs/gfs2/inode.c

@@ -600,7 +600,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
 	int error, free_vfs_inode = 0;
 	u32 aflags = 0;
 	unsigned blocks = 1;
-	struct gfs2_diradd da = { .bh = NULL, };
+	struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
 
 	if (!name->len || name->len > GFS2_FNAMESIZE)
 		return -ENAMETOOLONG;
@@ -672,6 +672,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
 	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 	gfs2_set_inode_blocks(inode, 1);
 	munge_mode_uid_gid(dip, inode);
+	check_and_update_goal(dip);
 	ip->i_goal = dip->i_goal;
 	ip->i_diskflags = 0;
 	ip->i_eattr = 0;
@@ -899,7 +900,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct gfs2_holder ghs[2];
 	struct buffer_head *dibh;
-	struct gfs2_diradd da = { .bh = NULL, };
+	struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
 	int error;
 
 	if (S_ISDIR(inode->i_mode))
@@ -1337,7 +1338,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
 	struct gfs2_rgrpd *nrgd;
 	unsigned int num_gh;
 	int dir_rename = 0;
-	struct gfs2_diradd da = { .nr_blocks = 0, };
+	struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, };
 	unsigned int x;
 	int error;
 

fs/gfs2/rgrp.c

@@ -577,6 +577,13 @@ struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd)
 	return rgd;
 }
 
+void check_and_update_goal(struct gfs2_inode *ip)
+{
+	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+	if (!ip->i_goal || gfs2_blk2rgrpd(sdp, ip->i_goal, 1) == NULL)
+		ip->i_goal = ip->i_no_addr;
+}
+
 void gfs2_free_clones(struct gfs2_rgrpd *rgd)
 {
 	int x;
@@ -1910,6 +1917,7 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, const struct gfs2_alloc_parms *a
 	} else if (ip->i_rgd && rgrp_contains_block(ip->i_rgd, ip->i_goal)) {
 		rs->rs_rbm.rgd = begin = ip->i_rgd;
 	} else {
+		check_and_update_goal(ip);
 		rs->rs_rbm.rgd = begin = gfs2_blk2rgrpd(sdp, ip->i_goal, 1);
 	}
 	if (S_ISDIR(ip->i_inode.i_mode) && (ap->aflags & GFS2_AF_ORLOV))
@@ -2089,7 +2097,7 @@ static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart,
 				     u32 blen, unsigned char new_state)
 {
 	struct gfs2_rbm rbm;
-	struct gfs2_bitmap *bi;
+	struct gfs2_bitmap *bi, *bi_prev = NULL;
 
 	rbm.rgd = gfs2_blk2rgrpd(sdp, bstart, 1);
 	if (!rbm.rgd) {
@@ -2098,18 +2106,22 @@ static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart,
 		return NULL;
 	}
 
+	gfs2_rbm_from_block(&rbm, bstart);
 	while (blen--) {
-		gfs2_rbm_from_block(&rbm, bstart);
 		bi = rbm_bi(&rbm);
-		bstart++;
-		if (!bi->bi_clone) {
-			bi->bi_clone = kmalloc(bi->bi_bh->b_size,
-					       GFP_NOFS | __GFP_NOFAIL);
-			memcpy(bi->bi_clone + bi->bi_offset,
-			       bi->bi_bh->b_data + bi->bi_offset, bi->bi_len);
+		if (bi != bi_prev) {
+			if (!bi->bi_clone) {
+				bi->bi_clone = kmalloc(bi->bi_bh->b_size,
+						      GFP_NOFS | __GFP_NOFAIL);
+				memcpy(bi->bi_clone + bi->bi_offset,
+				       bi->bi_bh->b_data + bi->bi_offset,
+				       bi->bi_len);
+			}
+			gfs2_trans_add_meta(rbm.rgd->rd_gl, bi->bi_bh);
+			bi_prev = bi;
 		}
-		gfs2_trans_add_meta(rbm.rgd->rd_gl, bi->bi_bh);
 		gfs2_setbit(&rbm, false, new_state);
+		gfs2_rbm_incr(&rbm);
 	}
 
 	return rbm.rgd;

fs/gfs2/rgrp.h

@@ -80,4 +80,5 @@ static inline bool gfs2_rs_active(struct gfs2_blkreserv *rs)
 	return rs && !RB_EMPTY_NODE(&rs->rs_node);
 }
 
+extern void check_and_update_goal(struct gfs2_inode *ip);
 #endif /* __RGRP_DOT_H__ */

fs/gfs2/trans.c

@@ -44,7 +44,7 @@ int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
 	if (!tr)
 		return -ENOMEM;
 
-	tr->tr_ip = (unsigned long)__builtin_return_address(0);
+	tr->tr_ip = _RET_IP_;
 	tr->tr_blocks = blocks;
 	tr->tr_revokes = revokes;
 	tr->tr_reserved = 1;