openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

pnfs/blocklayout: use the device id cache 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

149
fs/nfs/blocklayout/blocklayout.c
View File

@ -119,6 +119,8 @@ static struct bio *bl_alloc_init_bio(int npg, sector_t isect,
void (*end_io)(struct bio *, int err),
struct parallel_io *par)
{
struct pnfs_block_dev *dev =
container_of(be->be_device, struct pnfs_block_dev, d_node);
struct bio *bio;
npg = min(npg, BIO_MAX_PAGES);
@ -131,7 +133,7 @@ static struct bio *bl_alloc_init_bio(int npg, sector_t isect,
if (bio) {
bio->bi_iter.bi_sector = isect - be->be_f_offset +
be->be_v_offset;
bio->bi_bdev = be->be_mdev;
bio->bi_bdev = dev->d_bdev;
bio->bi_end_io = end_io;
bio->bi_private = par;
}
@ -515,96 +517,9 @@ bl_cleanup_layoutcommit(struct nfs4_layoutcommit_data *lcdata)
ext_tree_mark_committed(BLK_LO2EXT(lo), lcdata->res.status);
}
static void free_blk_mountid(struct block_mount_id *mid)
{
if (mid) {
struct pnfs_block_dev *dev, *tmp;
/* No need to take bm_lock as we are last user freeing bm_devlist */
list_for_each_entry_safe(dev, tmp, &mid->bm_devlist, bm_node) {
list_del(&dev->bm_node);
bl_free_block_dev(dev);
}
kfree(mid);
}
}
/* This is mostly copied from the filelayout_get_device_info function.
* It seems much of this should be at the generic pnfs level.
*/
static struct pnfs_block_dev *
nfs4_blk_get_deviceinfo(struct nfs_server *server, const struct nfs_fh *fh,
struct nfs4_deviceid *d_id)
{
struct pnfs_device *dev;
struct pnfs_block_dev *rv;
u32 max_resp_sz;
int max_pages;
struct page **pages = NULL;
int i, rc;
/*
* Use the session max response size as the basis for setting
* GETDEVICEINFO's maxcount
*/
max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
max_pages = nfs_page_array_len(0, max_resp_sz);
dprintk("%s max_resp_sz %u max_pages %d\n",
__func__, max_resp_sz, max_pages);
dev = kmalloc(sizeof(*dev), GFP_NOFS);
if (!dev) {
dprintk("%s kmalloc failed\n", __func__);
return ERR_PTR(-ENOMEM);
}
pages = kcalloc(max_pages, sizeof(struct page *), GFP_NOFS);
if (pages == NULL) {
kfree(dev);
return ERR_PTR(-ENOMEM);
}
for (i = 0; i < max_pages; i++) {
pages[i] = alloc_page(GFP_NOFS);
if (!pages[i]) {
rv = ERR_PTR(-ENOMEM);
goto out_free;
}
}
memcpy(&dev->dev_id, d_id, sizeof(*d_id));
dev->layout_type = LAYOUT_BLOCK_VOLUME;
dev->pages = pages;
dev->pgbase = 0;
dev->pglen = PAGE_SIZE * max_pages;
dev->mincount = 0;
dev->maxcount = max_resp_sz - nfs41_maxgetdevinfo_overhead;
dprintk("%s: dev_id: %s\n", __func__, dev->dev_id.data);
rc = nfs4_proc_getdeviceinfo(server, dev, NULL);
dprintk("%s getdevice info returns %d\n", __func__, rc);
if (rc) {
rv = ERR_PTR(rc);
goto out_free;
}
rv = nfs4_blk_decode_device(server, dev);
out_free:
for (i = 0; i < max_pages; i++)
__free_page(pages[i]);
kfree(pages);
kfree(dev);
return rv;
}
static int
bl_set_layoutdriver(struct nfs_server *server, const struct nfs_fh *fh)
{
struct block_mount_id *b_mt_id = NULL;
struct pnfs_devicelist *dlist = NULL;
struct pnfs_block_dev *bdev;
LIST_HEAD(block_disklist);
int status, i;
dprintk("%s enter\n", __func__);
if (server->pnfs_blksize == 0) {
@ -617,60 +532,7 @@ bl_set_layoutdriver(struct nfs_server *server, const struct nfs_fh *fh)
return -EINVAL;
}
b_mt_id = kzalloc(sizeof(struct block_mount_id), GFP_NOFS);
if (!b_mt_id) {
status = -ENOMEM;
goto out_error;
}
/* Initialize nfs4 block layout mount id */
spin_lock_init(&b_mt_id->bm_lock);
INIT_LIST_HEAD(&b_mt_id->bm_devlist);
dlist = kmalloc(sizeof(struct pnfs_devicelist), GFP_NOFS);
if (!dlist) {
status = -ENOMEM;
goto out_error;
}
dlist->eof = 0;
while (!dlist->eof) {
status = nfs4_proc_getdevicelist(server, fh, dlist);
if (status)
goto out_error;
dprintk("%s GETDEVICELIST numdevs=%i, eof=%i\n",
__func__, dlist->num_devs, dlist->eof);
for (i = 0; i < dlist->num_devs; i++) {
bdev = nfs4_blk_get_deviceinfo(server, fh,
&dlist->dev_id[i]);
if (IS_ERR(bdev)) {
status = PTR_ERR(bdev);
goto out_error;
}
spin_lock(&b_mt_id->bm_lock);
list_add(&bdev->bm_node, &b_mt_id->bm_devlist);
spin_unlock(&b_mt_id->bm_lock);
}
}
dprintk("%s SUCCESS\n", __func__);
server->pnfs_ld_data = b_mt_id;
out_return:
kfree(dlist);
return status;
out_error:
free_blk_mountid(b_mt_id);
goto out_return;
}
static int
bl_clear_layoutdriver(struct nfs_server *server)
{
struct block_mount_id *b_mt_id = server->pnfs_ld_data;
dprintk("%s enter\n", __func__);
free_blk_mountid(b_mt_id);
dprintk("%s RETURNS\n", __func__);
return 0;
return nfs4_deviceid_getdevicelist(server, fh);
}
static bool
@ -811,7 +673,8 @@ static struct pnfs_layoutdriver_type blocklayout_type = {
.encode_layoutcommit = bl_encode_layoutcommit,
.cleanup_layoutcommit = bl_cleanup_layoutcommit,
.set_layoutdriver = bl_set_layoutdriver,
.clear_layoutdriver = bl_clear_layoutdriver,
.alloc_deviceid_node = bl_alloc_deviceid_node,
.free_deviceid_node = bl_free_deviceid_node,
.pg_read_ops = &bl_pg_read_ops,
.pg_write_ops = &bl_pg_write_ops,
};

25
fs/nfs/blocklayout/blocklayout.h
View File

@ -44,16 +44,9 @@
#define PAGE_CACHE_SECTOR_SHIFT (PAGE_CACHE_SHIFT - SECTOR_SHIFT)
#define SECTOR_SIZE (1 << SECTOR_SHIFT)
struct block_mount_id {
spinlock_t bm_lock; /* protects list */
struct list_head bm_devlist; /* holds pnfs_block_dev */
};
struct pnfs_block_dev {
struct list_head bm_node;
struct nfs4_deviceid bm_mdevid; /* associated devid */
struct block_device *bm_mdev; /* meta device itself */
struct net *net;
struct nfs4_deviceid_node d_node;
struct block_device *d_bdev;
};
enum exstate4 {
@ -69,8 +62,7 @@ struct pnfs_block_extent {
struct rb_node be_node;
struct list_head be_list;
};
struct nfs4_deviceid be_devid; /* FIXME: could use device cache instead */
struct block_device *be_mdev;
struct nfs4_deviceid_node *be_device;
sector_t be_f_offset; /* the starting offset in the file */
sector_t be_length; /* the size of the extent */
sector_t be_v_offset; /* the starting offset in the volume */
@ -87,8 +79,6 @@ struct pnfs_block_layout {
spinlock_t bl_ext_lock; /* Protects list manipulation */
};
#define BLK_ID(lo) ((struct block_mount_id *)(NFS_SERVER(lo->plh_inode)->pnfs_ld_data))
static inline struct pnfs_block_layout *
BLK_LO2EXT(struct pnfs_layout_hdr *lo)
{
@ -120,14 +110,15 @@ struct bl_msg_hdr {
/* blocklayoutdev.c */
ssize_t bl_pipe_downcall(struct file *, const char __user *, size_t);
void bl_pipe_destroy_msg(struct rpc_pipe_msg *);
void nfs4_blkdev_put(struct block_device *bdev);
struct pnfs_block_dev *nfs4_blk_decode_device(struct nfs_server *server,
struct pnfs_device *dev);
int nfs4_blk_process_layoutget(struct pnfs_layout_hdr *lo,
struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
struct nfs4_deviceid_node *bl_alloc_deviceid_node(struct nfs_server *server,
struct pnfs_device *pdev, gfp_t gfp_mask);
void bl_free_deviceid_node(struct nfs4_deviceid_node *d);
/* blocklayoutdm.c */
void bl_free_block_dev(struct pnfs_block_dev *bdev);
void bl_dm_remove(struct net *net, dev_t dev);
/* extent_tree.c */
int ext_tree_insert(struct pnfs_block_layout *bl,

86
fs/nfs/blocklayout/blocklayoutdev.c
View File

@ -53,16 +53,6 @@ static int decode_sector_number(__be32 **rp, sector_t *sp)
return 0;
}
/*
* Release the block device
*/
void nfs4_blkdev_put(struct block_device *bdev)
{
dprintk("%s for device %d:%d\n", __func__, MAJOR(bdev->bd_dev),
MINOR(bdev->bd_dev));
blkdev_put(bdev, FMODE_READ);
}
ssize_t bl_pipe_downcall(struct file *filp, const char __user *src,
size_t mlen)
{
@ -92,12 +82,12 @@ void bl_pipe_destroy_msg(struct rpc_pipe_msg *msg)
/*
* Decodes pnfs_block_deviceaddr4 which is XDR encoded in dev->dev_addr_buf.
*/
struct pnfs_block_dev *
nfs4_blk_decode_device(struct nfs_server *server,
struct pnfs_device *dev)
struct nfs4_deviceid_node *
bl_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *dev,
gfp_t gfp_mask)
{
struct pnfs_block_dev *rv;
struct block_device *bd = NULL;
struct block_device *bd;
struct bl_pipe_msg bl_pipe_msg;
struct rpc_pipe_msg *msg = &bl_pipe_msg.msg;
struct bl_msg_hdr bl_msg = {
@ -117,11 +107,9 @@ nfs4_blk_decode_device(struct nfs_server *server,
bl_pipe_msg.bl_wq = &nn->bl_wq;
memset(msg, 0, sizeof(*msg));
msg->data = kzalloc(sizeof(bl_msg) + dev->mincount, GFP_NOFS);
if (!msg->data) {
rv = ERR_PTR(-ENOMEM);
msg->data = kzalloc(sizeof(bl_msg) + dev->mincount, gfp_mask);
if (!msg->data)
goto out;
}
memcpy(msg->data, &bl_msg, sizeof(bl_msg));
dataptr = (uint8_t *) msg->data;
@ -140,7 +128,6 @@ nfs4_blk_decode_device(struct nfs_server *server,
rc = rpc_queue_upcall(nn->bl_device_pipe, msg);
if (rc < 0) {
remove_wait_queue(&nn->bl_wq, &wq);
rv = ERR_PTR(rc);
goto out;
}
@ -152,7 +139,6 @@ nfs4_blk_decode_device(struct nfs_server *server,
if (reply->status != BL_DEVICE_REQUEST_PROC) {
printk(KERN_WARNING "%s failed to decode device: %d\n",
__func__, reply->status);
rv = ERR_PTR(-EINVAL);
goto out;
}
@ -162,51 +148,40 @@ nfs4_blk_decode_device(struct nfs_server *server,
printk(KERN_WARNING "%s failed to open device %d:%d (%ld)\n",
__func__, reply->major, reply->minor,
PTR_ERR(bd));
rv = ERR_CAST(bd);
goto out;
}
rv = kzalloc(sizeof(*rv), GFP_NOFS);
if (!rv) {
rv = ERR_PTR(-ENOMEM);
rv = kzalloc(sizeof(*rv), gfp_mask);
if (!rv)
goto out;
}
rv->bm_mdev = bd;
memcpy(&rv->bm_mdevid, &dev->dev_id, sizeof(struct nfs4_deviceid));
rv->net = net;
nfs4_init_deviceid_node(&rv->d_node, server, &dev->dev_id);
rv->d_bdev = bd;
dprintk("%s Created device %s with bd_block_size %u\n",
__func__,
bd->bd_disk->disk_name,
bd->bd_block_size);
kfree(msg->data);
return &rv->d_node;
out:
kfree(msg->data);
return rv;
return NULL;
}
/* Map deviceid returned by the server to constructed block_device */
static struct block_device *translate_devid(struct pnfs_layout_hdr *lo,
struct nfs4_deviceid *id)
void
bl_free_deviceid_node(struct nfs4_deviceid_node *d)
{
struct block_device *rv = NULL;
struct block_mount_id *mid;
struct pnfs_block_dev *dev;
struct pnfs_block_dev *dev =
container_of(d, struct pnfs_block_dev, d_node);
struct net *net = d->nfs_client->cl_net;
dprintk("%s enter, lo=%p, id=%p\n", __func__, lo, id);
mid = BLK_ID(lo);
spin_lock(&mid->bm_lock);
list_for_each_entry(dev, &mid->bm_devlist, bm_node) {
if (memcmp(id->data, dev->bm_mdevid.data,
NFS4_DEVICEID4_SIZE) == 0) {
rv = dev->bm_mdev;
goto out;
}
}
out:
spin_unlock(&mid->bm_lock);
dprintk("%s returning %p\n", __func__, rv);
return rv;
blkdev_put(dev->d_bdev, FMODE_READ);
bl_dm_remove(net, dev->d_bdev->bd_dev);
kfree(dev);
}
/* Tracks info needed to ensure extents in layout obey constraints of spec */
@ -309,15 +284,20 @@ nfs4_blk_process_layoutget(struct pnfs_layout_hdr *lo,
* recovery easier.
*/
for (i = 0; i < count; i++) {
struct nfs4_deviceid id;
be = kzalloc(sizeof(struct pnfs_block_extent), GFP_NOFS);
if (!be) {
status = -ENOMEM;
goto out_err;
}
memcpy(&be->be_devid, p, NFS4_DEVICEID4_SIZE);
memcpy(&id, p, NFS4_DEVICEID4_SIZE);
p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE);
be->be_mdev = translate_devid(lo, &be->be_devid);
if (!be->be_mdev)
be->be_device =
nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode), &id,
lo->plh_lc_cred, gfp_flags);
if (!be->be_device)
goto out_err;
/* The next three values are read in as bytes,
@ -364,12 +344,14 @@ nfs4_blk_process_layoutget(struct pnfs_layout_hdr *lo,
return status;
out_err:
nfs4_put_deviceid_node(be->be_device);
kfree(be);
out_free_list:
while (!list_empty(&extents)) {
be = list_first_entry(&extents, struct pnfs_block_extent,
be_list);
list_del(&be->be_list);
nfs4_put_deviceid_node(be->be_device);
kfree(be);
}
goto out;

26
fs/nfs/blocklayout/blocklayoutdm.c
View File

@ -38,7 +38,7 @@
#define NFSDBG_FACILITY NFSDBG_PNFS_LD
static void dev_remove(struct net *net, dev_t dev)
void bl_dm_remove(struct net *net, dev_t dev)
{
struct bl_pipe_msg bl_pipe_msg;
struct rpc_pipe_msg *msg = &bl_pipe_msg.msg;
@ -82,27 +82,3 @@ static void dev_remove(struct net *net, dev_t dev)
out:
kfree(msg->data);
}
/*
* Release meta device
*/
static void nfs4_blk_metadev_release(struct pnfs_block_dev *bdev)
{
dprintk("%s Releasing\n", __func__);
nfs4_blkdev_put(bdev->bm_mdev);
dev_remove(bdev->net, bdev->bm_mdev->bd_dev);
}
void bl_free_block_dev(struct pnfs_block_dev *bdev)
{
if (bdev) {
if (bdev->bm_mdev) {
dprintk("%s Removing DM device: %d:%d\n",
__func__,
MAJOR(bdev->bm_mdev->bd_dev),
MINOR(bdev->bm_mdev->bd_dev));
nfs4_blk_metadev_release(bdev);
}
kfree(bdev);
}
}

27
fs/nfs/blocklayout/extent_tree.c
View File

@ -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 @@ ext_tree_insert(struct pnfs_block_layout *bl, struct pnfs_block_extent *new)
__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 @@ ext_tree_insert(struct pnfs_block_layout *bl, struct pnfs_block_extent *new)
}
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);