X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-linux.git;a=blobdiff_plain;f=fs%2Fnfs%2Fblocklayout%2Fextent_tree.c;h=31d0b5e53dfd8fc8883dd70cc9220c198882d02f;hp=c8c59a5b1a8fc292f079a8f6d379b09d2a8ae83b;hb=b262b35c2ceb989c6b89dae6b8e0c0ce466cc90d;hpb=8067253c8cc531b6f367b9f5942bdc6168385701

diff --git a/fs/nfs/blocklayout/extent_tree.c b/fs/nfs/blocklayout/extent_tree.c
index c8c59a5b1a8f..31d0b5e53dfd 100644
--- a/fs/nfs/blocklayout/extent_tree.c
+++ b/fs/nfs/blocklayout/extent_tree.c
@@ -2,6 +2,8 @@
  * Copyright (c) 2014 Christoph Hellwig.
  */
 
+#include <linux/vmalloc.h>
+
 #include "blocklayout.h"
 
 #define NFSDBG_FACILITY		NFSDBG_PNFS_LD
@@ -71,7 +73,7 @@ ext_can_merge(struct pnfs_block_extent *be1, struct pnfs_block_extent *be2)
 {
 	if (be1->be_state != be2->be_state)
 		return false;
-	if (be1->be_mdev != be2->be_mdev)
+	if (be1->be_device != be2->be_device)
 		return false;
 
 	if (be1->be_f_offset + be1->be_length != be2->be_f_offset)
@@ -96,6 +98,7 @@ ext_try_to_merge_left(struct rb_root *root, struct pnfs_block_extent *be)
 	if (left && ext_can_merge(left, be)) {
 		left->be_length += be->be_length;
 		rb_erase(&be->be_node, root);
+		nfs4_put_deviceid_node(be->be_device);
 		kfree(be);
 		return left;
 	}
@@ -111,6 +114,7 @@ ext_try_to_merge_right(struct rb_root *root, struct pnfs_block_extent *be)
 	if (right && ext_can_merge(be, right)) {
 		be->be_length += right->be_length;
 		rb_erase(&right->be_node, root);
+		nfs4_put_deviceid_node(right->be_device);
 		kfree(right);
 	}
 
@@ -135,16 +139,14 @@ __ext_tree_insert(struct rb_root *root,
 					be->be_v_offset = new->be_v_offset;
 				be->be_length += new->be_length;
 				be = ext_try_to_merge_left(root, be);
-				kfree(new);
-				return;
+				goto free_new;
 			}
 			p = &(*p)->rb_left;
 		} else if (new->be_f_offset >= ext_f_end(be)) {
 			if (merge_ok && ext_can_merge(be, new)) {
 				be->be_length += new->be_length;
 				be = ext_try_to_merge_right(root, be);
-				kfree(new);
-				return;
+				goto free_new;
 			}
 			p = &(*p)->rb_right;
 		} else {
@@ -154,6 +156,10 @@ __ext_tree_insert(struct rb_root *root,
 
 	rb_link_node(&new->be_node, parent, p);
 	rb_insert_color(&new->be_node, root);
+	return;
+free_new:
+	nfs4_put_deviceid_node(new->be_device);
+	kfree(new);
 }
 
 static int
@@ -161,7 +167,6 @@ __ext_tree_remove(struct rb_root *root, sector_t start, sector_t end)
 {
 	struct pnfs_block_extent *be;
 	sector_t len1 = 0, len2 = 0;
-	sector_t orig_f_offset;
 	sector_t orig_v_offset;
 	sector_t orig_len;
 
@@ -171,7 +176,6 @@ __ext_tree_remove(struct rb_root *root, sector_t start, sector_t end)
 	if (be->be_f_offset >= end)
 		return 0;
 
-	orig_f_offset = be->be_f_offset;
 	orig_v_offset = be->be_v_offset;
 	orig_len = be->be_length;
 
@@ -198,9 +202,7 @@ __ext_tree_remove(struct rb_root *root, sector_t start, sector_t end)
 			new->be_length = len2;
 			new->be_state = be->be_state;
 			new->be_tag = be->be_tag;
-			new->be_mdev = be->be_mdev;
-			memcpy(&new->be_devid, &be->be_devid,
-				sizeof(struct nfs4_deviceid));
+			new->be_device = nfs4_get_deviceid(be->be_device);
 
 			__ext_tree_insert(root, new, true);
 		} else {
@@ -221,6 +223,7 @@ __ext_tree_remove(struct rb_root *root, sector_t start, sector_t end)
 			struct pnfs_block_extent *next = ext_tree_next(be);
 
 			rb_erase(&be->be_node, root);
+			nfs4_put_deviceid_node(be->be_device);
 			kfree(be);
 			be = next;
 		}
@@ -265,6 +268,7 @@ retry:
 		__ext_tree_insert(root, new, true);
 	} else if (new->be_f_offset >= be->be_f_offset) {
 		if (ext_f_end(new) <= ext_f_end(be)) {
+			nfs4_put_deviceid_node(new->be_device);
 			kfree(new);
 		} else {
 			sector_t new_len = ext_f_end(new) - ext_f_end(be);
@@ -290,6 +294,7 @@ retry:
 		}
 
 		split->be_length = be->be_f_offset - split->be_f_offset;
+		split->be_device = nfs4_get_deviceid(new->be_device);
 		__ext_tree_insert(root, split, true);
 
 		new->be_f_offset += diff;
@@ -365,9 +370,6 @@ ext_tree_split(struct rb_root *root, struct pnfs_block_extent *be,
 	struct pnfs_block_extent *new;
 	sector_t orig_len = be->be_length;
 
-	dprintk("%s: need split for 0x%lx:0x%lx at 0x%lx\n",
-		__func__, be->be_f_offset, ext_f_end(be), split);
-
 	new = kzalloc(sizeof(*new), GFP_ATOMIC);
 	if (!new)
 		return -ENOMEM;
@@ -380,14 +382,7 @@ ext_tree_split(struct rb_root *root, struct pnfs_block_extent *be,
 	new->be_length = orig_len - be->be_length;
 	new->be_state = be->be_state;
 	new->be_tag = be->be_tag;
-
-	new->be_mdev = be->be_mdev;
-	memcpy(&new->be_devid, &be->be_devid, sizeof(struct nfs4_deviceid));
-
-	dprintk("%s: got 0x%lx:0x%lx!\n",
-		__func__, be->be_f_offset, ext_f_end(be));
-	dprintk("%s: got 0x%lx:0x%lx!\n",
-		__func__, new->be_f_offset, ext_f_end(new));
+	new->be_device = nfs4_get_deviceid(be->be_device);
 
 	__ext_tree_insert(root, new, false);
 	return 0;
@@ -467,19 +462,25 @@ out:
 	return err;
 }
 
-int
-ext_tree_encode_commit(struct pnfs_block_layout *bl, struct xdr_stream *xdr)
+static void ext_tree_free_commitdata(struct nfs4_layoutcommit_args *arg,
+		size_t buffer_size)
 {
-	struct pnfs_block_extent *be;
-	unsigned int count = 0;
-	__be32 *p, *xdr_start;
-	int ret = 0;
+	if (arg->layoutupdate_pages != &arg->layoutupdate_page) {
+		int nr_pages = DIV_ROUND_UP(buffer_size, PAGE_SIZE), i;
 
-	dprintk("%s enter\n", __func__);
+		for (i = 0; i < nr_pages; i++)
+			put_page(arg->layoutupdate_pages[i]);
+		kfree(arg->layoutupdate_pages);
+	} else {
+		put_page(arg->layoutupdate_page);
+	}
+}
 
-	xdr_start = xdr_reserve_space(xdr, 8);
-	if (!xdr_start)
-		return -ENOSPC;
+static int ext_tree_encode_commit(struct pnfs_block_layout *bl, __be32 *p,
+		size_t buffer_size, size_t *count)
+{
+	struct pnfs_block_extent *be;
+	int ret = 0;
 
 	spin_lock(&bl->bl_ext_lock);
 	for (be = ext_tree_first(&bl->bl_ext_rw); be; be = ext_tree_next(be)) {
@@ -487,15 +488,14 @@ ext_tree_encode_commit(struct pnfs_block_layout *bl, struct xdr_stream *xdr)
 		    be->be_tag != EXTENT_WRITTEN)
 			continue;
 
-		p = xdr_reserve_space(xdr, 7 * sizeof(__be32) +
-					NFS4_DEVICEID4_SIZE);
-		if (!p) {
-			printk("%s: out of space for extent list\n", __func__);
+		(*count)++;
+		if (*count * BL_EXTENT_SIZE > buffer_size) {
+			/* keep counting.. */
 			ret = -ENOSPC;
-			break;
+			continue;
 		}
 
-		p = xdr_encode_opaque_fixed(p, be->be_devid.data,
+		p = xdr_encode_opaque_fixed(p, be->be_device->deviceid.data,
 				NFS4_DEVICEID4_SIZE);
 		p = xdr_encode_hyper(p, be->be_f_offset << SECTOR_SHIFT);
 		p = xdr_encode_hyper(p, be->be_length << SECTOR_SHIFT);
@@ -503,25 +503,80 @@ ext_tree_encode_commit(struct pnfs_block_layout *bl, struct xdr_stream *xdr)
 		*p++ = cpu_to_be32(PNFS_BLOCK_READWRITE_DATA);
 
 		be->be_tag = EXTENT_COMMITTING;
-		count++;
 	}
 	spin_unlock(&bl->bl_ext_lock);
 
-	xdr_start[0] = cpu_to_be32((xdr->p - xdr_start - 1) * 4);
-	xdr_start[1] = cpu_to_be32(count);
-
-	dprintk("%s found %i ranges\n", __func__, count);
 	return ret;
 }
 
+int
+ext_tree_prepare_commit(struct nfs4_layoutcommit_args *arg)
+{
+	struct pnfs_block_layout *bl = BLK_LO2EXT(NFS_I(arg->inode)->layout);
+	size_t count = 0, buffer_size = PAGE_SIZE;
+	__be32 *start_p;
+	int ret;
+
+	dprintk("%s enter\n", __func__);
+
+	arg->layoutupdate_page = alloc_page(GFP_NOFS);
+	if (!arg->layoutupdate_page)
+		return -ENOMEM;
+	start_p = page_address(arg->layoutupdate_page);
+	arg->layoutupdate_pages = &arg->layoutupdate_page;
+
+retry:
+	ret = ext_tree_encode_commit(bl, start_p + 1, buffer_size, &count);
+	if (unlikely(ret)) {
+		ext_tree_free_commitdata(arg, buffer_size);
+
+		buffer_size = sizeof(__be32) + BL_EXTENT_SIZE * count;
+		count = 0;
+
+		arg->layoutupdate_pages =
+			kcalloc(DIV_ROUND_UP(buffer_size, PAGE_SIZE),
+				sizeof(struct page *), GFP_NOFS);
+		if (!arg->layoutupdate_pages)
+			return -ENOMEM;
+
+		start_p = __vmalloc(buffer_size, GFP_NOFS, PAGE_KERNEL);
+		if (!start_p) {
+			kfree(arg->layoutupdate_pages);
+			return -ENOMEM;
+		}
+
+		goto retry;
+	}
+
+	*start_p = cpu_to_be32(count);
+	arg->layoutupdate_len = sizeof(__be32) + BL_EXTENT_SIZE * count;
+
+	if (unlikely(arg->layoutupdate_pages != &arg->layoutupdate_page)) {
+		__be32 *p = start_p;
+		int i = 0;
+
+		for (p = start_p;
+		     p < start_p + arg->layoutupdate_len;
+		     p += PAGE_SIZE) {
+			arg->layoutupdate_pages[i++] = vmalloc_to_page(p);
+		}
+	}
+
+	dprintk("%s found %zu ranges\n", __func__, count);
+	return 0;
+}
+
 void
-ext_tree_mark_committed(struct pnfs_block_layout *bl, int status)
+ext_tree_mark_committed(struct nfs4_layoutcommit_args *arg, int status)
 {
+	struct pnfs_block_layout *bl = BLK_LO2EXT(NFS_I(arg->inode)->layout);
 	struct rb_root *root = &bl->bl_ext_rw;
 	struct pnfs_block_extent *be;
 
 	dprintk("%s status %d\n", __func__, status);
 
+	ext_tree_free_commitdata(arg, arg->layoutupdate_len);
+
 	spin_lock(&bl->bl_ext_lock);
 	for (be = ext_tree_first(root); be; be = ext_tree_next(be)) {
 		if (be->be_state != PNFS_BLOCK_INVALID_DATA ||