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pnfs/blocklayout: use the device id cache

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Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Christoph Hellwig
2014-09-02 21:28:00 -07:00
committed by Trond Myklebust
parent 30ff0603ca
commit 20d655d619
5 changed files with 64 additions and 249 deletions
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27
fs/nfs/blocklayout/extent_tree.c
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@@ -71,7 +71,7 @@ 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 +96,7 @@ 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 +112,7 @@ 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 +137,14 @@ __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 +154,10 @@ __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
@@ -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;
@@ -380,9 +385,7 @@ 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));
new->be_device = nfs4_get_deviceid(be->be_device);
dprintk("%s: got 0x%lx:0x%lx!\n",
__func__, be->be_f_offset, ext_f_end(be));
@@ -495,7 +498,7 @@ ext_tree_encode_commit(struct pnfs_block_layout *bl, struct xdr_stream *xdr)
break;
}
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);