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authorChristoph Hellwig <hch@lst.de>2014-09-02 21:27:57 -0700
committerTrond Myklebust <trond.myklebust@primarydata.com>2014-09-10 12:47:03 -0700
commit661373b13d0490ff410a2133d4a7a117f2dd037e (patch)
treea2f515ecbc46316adfd1b937d62eeb9a48957d1c /fs/nfs/objlayout
parent848746bd247cdc3ce1d103e92913316445763778 (diff)
downloadop-kernel-dev-661373b13d0490ff410a2133d4a7a117f2dd037e.zip
op-kernel-dev-661373b13d0490ff410a2133d4a7a117f2dd037e.tar.gz
pnfs: factor GETDEVICEINFO implementations
Add support to the common pNFS core to issue GETDEVICEINFO calls on a device ID cache miss. The code is taken from the well debugged file layout implementation and calls out to the layoutdriver through a new alloc_deviceid_node method. The calling conventions for nfs4_find_get_deviceid are changed so that all information needed to send a GETDEVICEINFO request is passed to the common code. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/objlayout')
-rw-r--r--fs/nfs/objlayout/objio_osd.c113
-rw-r--r--fs/nfs/objlayout/objlayout.c70
-rw-r--r--fs/nfs/objlayout/objlayout.h5
3 files changed, 41 insertions, 147 deletions
diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c
index ae05278..c502f64 100644
--- a/fs/nfs/objlayout/objio_osd.c
+++ b/fs/nfs/objlayout/objio_osd.c
@@ -60,52 +60,6 @@ objio_free_deviceid_node(struct nfs4_deviceid_node *d)
kfree(de);
}
-static struct objio_dev_ent *_dev_list_find(const struct nfs_server *nfss,
- const struct nfs4_deviceid *d_id)
-{
- struct nfs4_deviceid_node *d;
- struct objio_dev_ent *de;
-
- d = nfs4_find_get_deviceid(nfss->pnfs_curr_ld, nfss->nfs_client, d_id);
- if (!d)
- return NULL;
-
- de = container_of(d, struct objio_dev_ent, id_node);
- return de;
-}
-
-static struct objio_dev_ent *
-_dev_list_add(const struct nfs_server *nfss,
- const struct nfs4_deviceid *d_id, struct osd_dev *od,
- gfp_t gfp_flags)
-{
- struct nfs4_deviceid_node *d;
- struct objio_dev_ent *de = kzalloc(sizeof(*de), gfp_flags);
- struct objio_dev_ent *n;
-
- if (!de) {
- dprintk("%s: -ENOMEM od=%p\n", __func__, od);
- return NULL;
- }
-
- dprintk("%s: Adding od=%p\n", __func__, od);
- nfs4_init_deviceid_node(&de->id_node,
- nfss->pnfs_curr_ld,
- nfss->nfs_client,
- d_id);
- de->od.od = od;
-
- d = nfs4_insert_deviceid_node(&de->id_node);
- n = container_of(d, struct objio_dev_ent, id_node);
- if (n != de) {
- dprintk("%s: Race with other n->od=%p\n", __func__, n->od.od);
- objio_free_deviceid_node(&de->id_node);
- de = n;
- }
-
- return de;
-}
-
struct objio_segment {
struct pnfs_layout_segment lseg;
@@ -130,29 +84,24 @@ struct objio_state {
/* Send and wait for a get_device_info of devices in the layout,
then look them up with the osd_initiator library */
-static int objio_devices_lookup(struct pnfs_layout_hdr *pnfslay,
- struct objio_segment *objio_seg, unsigned c, struct nfs4_deviceid *d_id,
- gfp_t gfp_flags)
+struct nfs4_deviceid_node *
+objio_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *pdev,
+ gfp_t gfp_flags)
{
struct pnfs_osd_deviceaddr *deviceaddr;
- struct objio_dev_ent *ode;
+ struct objio_dev_ent *ode = NULL;
struct osd_dev *od;
struct osd_dev_info odi;
bool retry_flag = true;
+ u32 *p;
int err;
- ode = _dev_list_find(NFS_SERVER(pnfslay->plh_inode), d_id);
- if (ode) {
- objio_seg->oc.ods[c] = &ode->od; /* must use container_of */
- return 0;
- }
+ deviceaddr = kzalloc(sizeof(*deviceaddr), gfp_flags);
+ if (!deviceaddr)
+ return NULL;
- err = objlayout_get_deviceinfo(pnfslay, d_id, &deviceaddr, gfp_flags);
- if (unlikely(err)) {
- dprintk("%s: objlayout_get_deviceinfo dev(%llx:%llx) =>%d\n",
- __func__, _DEVID_LO(d_id), _DEVID_HI(d_id), err);
- return err;
- }
+ p = page_address(pdev->pages[0]);
+ pnfs_osd_xdr_decode_deviceaddr(deviceaddr, p);
odi.systemid_len = deviceaddr->oda_systemid.len;
if (odi.systemid_len > sizeof(odi.systemid)) {
@@ -188,14 +137,24 @@ retry_lookup:
goto out;
}
- ode = _dev_list_add(NFS_SERVER(pnfslay->plh_inode), d_id, od,
- gfp_flags);
- objio_seg->oc.ods[c] = &ode->od; /* must use container_of */
dprintk("Adding new dev_id(%llx:%llx)\n",
- _DEVID_LO(d_id), _DEVID_HI(d_id));
+ _DEVID_LO(&pdev->dev_id), _DEVID_HI(&pdev->dev_id));
+
+ ode = kzalloc(sizeof(*ode), gfp_flags);
+ if (!ode) {
+ dprintk("%s: -ENOMEM od=%p\n", __func__, od);
+ goto out;
+ }
+
+ nfs4_init_deviceid_node(&ode->id_node, server, &pdev->dev_id);
+ kfree(deviceaddr);
+
+ ode->od.od = od;
+ return &ode->id_node;
+
out:
- objlayout_put_deviceinfo(deviceaddr);
- return err;
+ kfree(deviceaddr);
+ return NULL;
}
static void copy_single_comp(struct ore_components *oc, unsigned c,
@@ -254,6 +213,7 @@ int objio_alloc_lseg(struct pnfs_layout_segment **outp,
struct xdr_stream *xdr,
gfp_t gfp_flags)
{
+ struct nfs_server *server = NFS_SERVER(pnfslay->plh_inode);
struct objio_segment *objio_seg;
struct pnfs_osd_xdr_decode_layout_iter iter;
struct pnfs_osd_layout layout;
@@ -283,13 +243,21 @@ int objio_alloc_lseg(struct pnfs_layout_segment **outp,
objio_seg->oc.first_dev = layout.olo_comps_index;
cur_comp = 0;
while (pnfs_osd_xdr_decode_layout_comp(&src_comp, &iter, xdr, &err)) {
+ struct nfs4_deviceid_node *d;
+ struct objio_dev_ent *ode;
+
copy_single_comp(&objio_seg->oc, cur_comp, &src_comp);
- err = objio_devices_lookup(pnfslay, objio_seg, cur_comp,
- &src_comp.oc_object_id.oid_device_id,
- gfp_flags);
- if (err)
+
+ d = nfs4_find_get_deviceid(server,
+ &src_comp.oc_object_id.oid_device_id,
+ pnfslay->plh_lc_cred, gfp_flags);
+ if (!d) {
+ err = -ENXIO;
goto err;
- ++cur_comp;
+ }
+
+ ode = container_of(d, struct objio_dev_ent, id_node);
+ objio_seg->oc.ods[cur_comp++] = &ode->od;
}
/* pnfs_osd_xdr_decode_layout_comp returns false on error */
if (unlikely(err))
@@ -653,6 +621,7 @@ static struct pnfs_layoutdriver_type objlayout_type = {
.flags = PNFS_LAYOUTRET_ON_SETATTR |
PNFS_LAYOUTRET_ON_ERROR,
+ .max_deviceinfo_size = PAGE_SIZE,
.owner = THIS_MODULE,
.alloc_layout_hdr = objlayout_alloc_layout_hdr,
.free_layout_hdr = objlayout_free_layout_hdr,
diff --git a/fs/nfs/objlayout/objlayout.c b/fs/nfs/objlayout/objlayout.c
index 697a16d..c89357c 100644
--- a/fs/nfs/objlayout/objlayout.c
+++ b/fs/nfs/objlayout/objlayout.c
@@ -574,76 +574,6 @@ loop_done:
dprintk("%s: Return\n", __func__);
}
-
-/*
- * Get Device Info API for io engines
- */
-struct objlayout_deviceinfo {
- struct page *page;
- struct pnfs_osd_deviceaddr da; /* This must be last */
-};
-
-/* Initialize and call nfs_getdeviceinfo, then decode and return a
- * "struct pnfs_osd_deviceaddr *" Eventually objlayout_put_deviceinfo()
- * should be called.
- */
-int objlayout_get_deviceinfo(struct pnfs_layout_hdr *pnfslay,
- struct nfs4_deviceid *d_id, struct pnfs_osd_deviceaddr **deviceaddr,
- gfp_t gfp_flags)
-{
- struct objlayout_deviceinfo *odi;
- struct pnfs_device pd;
- struct page *page, **pages;
- u32 *p;
- int err;
-
- page = alloc_page(gfp_flags);
- if (!page)
- return -ENOMEM;
-
- pages = &page;
- pd.pages = pages;
-
- memcpy(&pd.dev_id, d_id, sizeof(*d_id));
- pd.layout_type = LAYOUT_OSD2_OBJECTS;
- pd.pages = &page;
- pd.pgbase = 0;
- pd.pglen = PAGE_SIZE;
- pd.mincount = 0;
- pd.maxcount = PAGE_SIZE;
-
- err = nfs4_proc_getdeviceinfo(NFS_SERVER(pnfslay->plh_inode), &pd,
- pnfslay->plh_lc_cred);
- dprintk("%s nfs_getdeviceinfo returned %d\n", __func__, err);
- if (err)
- goto err_out;
-
- p = page_address(page);
- odi = kzalloc(sizeof(*odi), gfp_flags);
- if (!odi) {
- err = -ENOMEM;
- goto err_out;
- }
- pnfs_osd_xdr_decode_deviceaddr(&odi->da, p);
- odi->page = page;
- *deviceaddr = &odi->da;
- return 0;
-
-err_out:
- __free_page(page);
- return err;
-}
-
-void objlayout_put_deviceinfo(struct pnfs_osd_deviceaddr *deviceaddr)
-{
- struct objlayout_deviceinfo *odi = container_of(deviceaddr,
- struct objlayout_deviceinfo,
- da);
-
- __free_page(odi->page);
- kfree(odi);
-}
-
enum {
OBJLAYOUT_MAX_URI_LEN = 256, OBJLAYOUT_MAX_OSDNAME_LEN = 64,
OBJLAYOUT_MAX_SYSID_HEX_LEN = OSD_SYSTEMID_LEN * 2 + 1,
diff --git a/fs/nfs/objlayout/objlayout.h b/fs/nfs/objlayout/objlayout.h
index fd13f1d..3a0828d 100644
--- a/fs/nfs/objlayout/objlayout.h
+++ b/fs/nfs/objlayout/objlayout.h
@@ -149,11 +149,6 @@ extern void objlayout_read_done(struct objlayout_io_res *oir,
extern void objlayout_write_done(struct objlayout_io_res *oir,
ssize_t status, bool sync);
-extern int objlayout_get_deviceinfo(struct pnfs_layout_hdr *pnfslay,
- struct nfs4_deviceid *d_id, struct pnfs_osd_deviceaddr **deviceaddr,
- gfp_t gfp_flags);
-extern void objlayout_put_deviceinfo(struct pnfs_osd_deviceaddr *deviceaddr);
-
/*
* exported generic objects function vectors
*/
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