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NFS/flexfiles: Don't invalidate DS deviceids for being unresponsive

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If the DS is unresponsive, we want to just mark it as such, while
reporting the errors. If the server later returns the same deviceid
in a new layout, then we don't want to have to look it up again.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2019-02-26 13:52:50 -05:00
parent d082d4b5a0
commit 17aaec8167
2 changed files with 3 additions and 21 deletions
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18
fs/nfs/flexfilelayout/flexfilelayout.h
View File

@ -180,24 +180,6 @@ ff_layout_no_read_on_rw(struct pnfs_layout_segment *lseg)
return FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_READ_IO;
}
static inline bool
ff_layout_test_devid_unavailable(struct nfs4_deviceid_node *node)
{
/*
* Flexfiles should never mark a DS unavailable, but if it does
* print a (ratelimited) warning as this can affect performance.
*/
if (nfs4_test_deviceid_unavailable(node)) {
u32 *p = (u32 *)node->deviceid.data;
pr_warn_ratelimited("NFS: flexfiles layout referencing an "
"unavailable device [%x%x%x%x]\n",
p[0], p[1], p[2], p[3]);
return true;
}
return false;
}
static inline int
nfs4_ff_layout_ds_version(struct pnfs_layout_segment *lseg, u32 ds_idx)
{

6
fs/nfs/flexfilelayout/flexfilelayoutdev.c
View File

@ -186,7 +186,7 @@ nfs4_ff_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *pdev,
static void ff_layout_mark_devid_invalid(struct pnfs_layout_segment *lseg,
struct nfs4_deviceid_node *devid)
{
nfs4_delete_deviceid(devid->ld, devid->nfs_client, &devid->deviceid);
nfs4_mark_deviceid_unavailable(devid);
if (!ff_layout_has_available_ds(lseg))
pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode,
lseg);
@ -605,7 +605,7 @@ static bool ff_read_layout_has_available_ds(struct pnfs_layout_segment *lseg)
if (IS_ERR(mirror->mirror_ds))
continue;
devid = &mirror->mirror_ds->id_node;
if (!ff_layout_test_devid_unavailable(devid))
if (!nfs4_test_deviceid_unavailable(devid))
return true;
}
}
@ -626,7 +626,7 @@ static bool ff_rw_layout_has_available_ds(struct pnfs_layout_segment *lseg)
if (!mirror->mirror_ds)
continue;
devid = &mirror->mirror_ds->id_node;
if (ff_layout_test_devid_unavailable(devid))
if (nfs4_test_deviceid_unavailable(devid))
return false;
}