From: Fred Isaman <iisaman@xxxxxxxxxxxxxx>
Call GETDEVICELIST during mount, then call and parse GETDEVICEINFO
for each device returned.
[pnfsblock: get rid of deprecated xdr macros]
Signed-off-by: Jim Rees <rees@xxxxxxxxx>
[pnfsblock: fix pnfs_deviceid references]
Signed-off-by: Fred Isaman <iisaman@xxxxxxxxxxxxxx>
[pnfsblock: fix print format warnings for sector_t and size_t]
[pnfs-block: #include <linux/vmalloc.h>]
[pnfsblock: no PNFS_NFS_SERVER]
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
[pnfsblock: fix bug determining size of striped volume]
[pnfsblock: fix oops when using multiple devices]
Signed-off-by: Fred Isaman <iisaman@xxxxxxxxxxxxxx>
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxx>
[pnfsblock: get rid of vmap and deviceid->area structure]
Signed-off-by: Peng Tao <peng_tao@xxxxxxx>
---
fs/nfs/blocklayout/blocklayout.c | 138 ++++++++++++++++++++++++++++++++++-
fs/nfs/blocklayout/blocklayout.h | 13 +++-
fs/nfs/blocklayout/blocklayoutdev.c | 13 +++-
fs/nfs/pnfs.h | 1 -
include/linux/nfs_fs_sb.h | 1 +
5 files changed, 158 insertions(+), 8 deletions(-)
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index 5793b0e..c4d2ee0 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -158,17 +158,153 @@ bl_cleanup_layoutcommit(struct pnfs_layout_hdr *lo,
{
}
+static void free_blk_mountid(struct block_mount_id *mid)
+{
+ if (mid) {
+ struct pnfs_block_dev *dev;
+ spin_lock(&mid->bm_lock);
+ while (!list_empty(&mid->bm_devlist)) {
+ dev = list_first_entry(&mid->bm_devlist,
+ struct pnfs_block_dev,
+ bm_node);
+ list_del(&dev->bm_node);
+ bl_free_block_dev(dev);
+ }
+ spin_unlock(&mid->bm_lock);
+ kfree(mid);
+ }
+}
+
+/* This is mostly copied from the filelayout's 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 = NULL;
+ 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 = max_resp_sz >> PAGE_SHIFT;
+ 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 NULL;
+ }
+
+ pages = kzalloc(max_pages * sizeof(struct page *), GFP_NOFS);
+ if (pages == NULL) {
+ kfree(dev);
+ return NULL;
+ }
+ for (i = 0; i < max_pages; i++) {
+ pages[i] = alloc_page(GFP_NOFS);
+ if (!pages[i])
+ 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;
+
+ dprintk("%s: dev_id: %s\n", __func__, dev->dev_id.data);
+ rc = nfs4_proc_getdeviceinfo(server, dev);
+ dprintk("%s getdevice info returns %d\n", __func__, rc);
+ if (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 = 0, i;
+
dprintk("%s enter\n", __func__);
- return 0;
+
+ if (server->pnfs_blksize == 0) {
+ dprintk("%s Server did not return blksize\n", __func__);
+ 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 (!bdev) {
+ status = -ENODEV;
+ 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;
}
diff --git a/fs/nfs/blocklayout/blocklayout.h b/fs/nfs/blocklayout/blocklayout.h
index 581d8f4..d645880 100644
--- a/fs/nfs/blocklayout/blocklayout.h
+++ b/fs/nfs/blocklayout/blocklayout.h
@@ -38,6 +38,11 @@
#include "../pnfs.h"
+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 */
@@ -99,7 +104,10 @@ struct pnfs_block_layout {
sector_t bl_blocksize; /* Server blocksize in sectors */
};
-static inline struct pnfs_block_layout *BLK_LO2EXT(struct pnfs_layout_hdr *lo)
+#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)
{
return container_of(lo, struct pnfs_block_layout, bl_layout);
}
@@ -137,8 +145,7 @@ void bl_pipe_destroy_msg(struct rpc_pipe_msg *);
struct block_device *nfs4_blkdev_get(dev_t dev);
int nfs4_blkdev_put(struct block_device *bdev);
struct pnfs_block_dev *nfs4_blk_decode_device(struct nfs_server *server,
- struct pnfs_device *dev,
- struct list_head *sdlist);
+ struct pnfs_device *dev);
int nfs4_blk_process_layoutget(struct pnfs_layout_hdr *lo,
struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
diff --git a/fs/nfs/blocklayout/blocklayoutdev.c b/fs/nfs/blocklayout/blocklayoutdev.c
index 64da33a..b23fe60 100644
--- a/fs/nfs/blocklayout/blocklayoutdev.c
+++ b/fs/nfs/blocklayout/blocklayoutdev.c
@@ -116,8 +116,7 @@ void bl_pipe_destroy_msg(struct rpc_pipe_msg *msg)
*/
struct pnfs_block_dev *
nfs4_blk_decode_device(struct nfs_server *server,
- struct pnfs_device *dev,
- struct list_head *sdlist)
+ struct pnfs_device *dev)
{
struct pnfs_block_dev *rv = NULL;
struct block_device *bd = NULL;
@@ -129,6 +128,7 @@ nfs4_blk_decode_device(struct nfs_server *server,
uint8_t *dataptr;
DECLARE_WAITQUEUE(wq, current);
struct bl_dev_msg *reply = &bl_mount_reply;
+ int offset, len, i;
dprintk("%s CREATING PIPEFS MESSAGE\n", __func__);
dprintk("%s: deviceid: %s, mincount: %d\n", __func__, dev->dev_id.data,
@@ -143,7 +143,14 @@ nfs4_blk_decode_device(struct nfs_server *server,
memcpy(msg.data, &bl_msg, sizeof(bl_msg));
dataptr = (uint8_t *) msg.data;
- memcpy(&dataptr[sizeof(bl_msg)], dev->area, dev->mincount);
+ len = dev->mincount;
+ offset = sizeof(bl_msg);
+ for (i = 0; len > 0; i++) {
+ memcpy(&dataptr[offset], page_address(dev->pages[i]),
+ len < PAGE_CACHE_SIZE ? len : PAGE_CACHE_SIZE);
+ len -= PAGE_CACHE_SIZE;
+ offset += PAGE_CACHE_SIZE;
+ }
msg.len = sizeof(bl_msg) + dev->mincount;
dprintk("%s CALLING USERSPACE DAEMON\n", __func__);
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index f271425..82dde37 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -141,7 +141,6 @@ struct pnfs_device {
unsigned int layout_type;
unsigned int mincount;
struct page **pages;
- void *area;
unsigned int pgbase;
unsigned int pglen;
};
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index b2ea8b8..cc03fc1 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -146,6 +146,7 @@ struct nfs_server {
struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */
struct rpc_wait_queue roc_rpcwaitq;
u32 pnfs_blksize; /* layout_blksize attr */
+ void *pnfs_ld_data; /* per mount point data */
/* the following fields are protected by nfs_client->cl_lock */
struct rb_root state_owners;
--
1.7.4.1
--
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