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path: root/fs/nfs/objlayout/objio_osd.c
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Diffstat (limited to 'fs/nfs/objlayout/objio_osd.c')
-rw-r--r--fs/nfs/objlayout/objio_osd.c54
1 files changed, 37 insertions, 17 deletions
diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c
index 55d0128..4bff4a3 100644
--- a/fs/nfs/objlayout/objio_osd.c
+++ b/fs/nfs/objlayout/objio_osd.c
@@ -137,6 +137,7 @@ static int objio_devices_lookup(struct pnfs_layout_hdr *pnfslay,
struct objio_dev_ent *ode;
struct osd_dev *od;
struct osd_dev_info odi;
+ bool retry_flag = true;
int err;
ode = _dev_list_find(NFS_SERVER(pnfslay->plh_inode), d_id);
@@ -171,10 +172,18 @@ static int objio_devices_lookup(struct pnfs_layout_hdr *pnfslay,
goto out;
}
+retry_lookup:
od = osduld_info_lookup(&odi);
if (unlikely(IS_ERR(od))) {
err = PTR_ERR(od);
dprintk("%s: osduld_info_lookup => %d\n", __func__, err);
+ if (err == -ENODEV && retry_flag) {
+ err = objlayout_autologin(deviceaddr);
+ if (likely(!err)) {
+ retry_flag = false;
+ goto retry_lookup;
+ }
+ }
goto out;
}
@@ -205,25 +214,36 @@ static void copy_single_comp(struct ore_components *oc, unsigned c,
int __alloc_objio_seg(unsigned numdevs, gfp_t gfp_flags,
struct objio_segment **pseg)
{
- struct __alloc_objio_segment {
- struct objio_segment olseg;
- struct ore_dev *ods[numdevs];
- struct ore_comp comps[numdevs];
- } *aolseg;
-
- aolseg = kzalloc(sizeof(*aolseg), gfp_flags);
- if (unlikely(!aolseg)) {
+/* This is the in memory structure of the objio_segment
+ *
+ * struct __alloc_objio_segment {
+ * struct objio_segment olseg;
+ * struct ore_dev *ods[numdevs];
+ * struct ore_comp comps[numdevs];
+ * } *aolseg;
+ * NOTE: The code as above compiles and runs perfectly. It is elegant,
+ * type safe and compact. At some Past time Linus has decided he does not
+ * like variable length arrays, For the sake of this principal we uglify
+ * the code as below.
+ */
+ struct objio_segment *lseg;
+ size_t lseg_size = sizeof(*lseg) +
+ numdevs * sizeof(lseg->oc.ods[0]) +
+ numdevs * sizeof(*lseg->oc.comps);
+
+ lseg = kzalloc(lseg_size, gfp_flags);
+ if (unlikely(!lseg)) {
dprintk("%s: Faild allocation numdevs=%d size=%zd\n", __func__,
- numdevs, sizeof(*aolseg));
+ numdevs, lseg_size);
return -ENOMEM;
}
- aolseg->olseg.oc.numdevs = numdevs;
- aolseg->olseg.oc.single_comp = EC_MULTPLE_COMPS;
- aolseg->olseg.oc.comps = aolseg->comps;
- aolseg->olseg.oc.ods = aolseg->ods;
+ lseg->oc.numdevs = numdevs;
+ lseg->oc.single_comp = EC_MULTPLE_COMPS;
+ lseg->oc.ods = (void *)(lseg + 1);
+ lseg->oc.comps = (void *)(lseg->oc.ods + numdevs);
- *pseg = &aolseg->olseg;
+ *pseg = lseg;
return 0;
}
@@ -582,10 +602,10 @@ objlayout_init(void)
if (ret)
printk(KERN_INFO
- "%s: Registering OSD pNFS Layout Driver failed: error=%d\n",
+ "NFS: %s: Registering OSD pNFS Layout Driver failed: error=%d\n",
__func__, ret);
else
- printk(KERN_INFO "%s: Registered OSD pNFS Layout Driver\n",
+ printk(KERN_INFO "NFS: %s: Registered OSD pNFS Layout Driver\n",
__func__);
return ret;
}
@@ -594,7 +614,7 @@ static void __exit
objlayout_exit(void)
{
pnfs_unregister_layoutdriver(&objlayout_type);
- printk(KERN_INFO "%s: Unregistered OSD pNFS Layout Driver\n",
+ printk(KERN_INFO "NFS: %s: Unregistered OSD pNFS Layout Driver\n",
__func__);
}
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