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pnfs/blocklayout: set PNFS_LAYOUTRETURN_ON_ERROR 

If there's an error doing I/O to block device, and the client resends the
I/O to the MDS, the MDS must recall the layout from the client before
processing the I/O.  Let's preempt that exchange by returning the layout
before falling back to the MDS when there's an error.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Benjamin Coddington 2017-12-08 12:52:57 -05:00 committed by Trond Myklebust
parent ad6b0241c9
commit d78471d32b
2 changed files with 5 additions and 1 deletions
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2
fs/nfs/blocklayout/blocklayout.c
View File

@ -887,6 +887,7 @@ static struct pnfs_layoutdriver_type blocklayout_type = {
.name = "LAYOUT_BLOCK_VOLUME",
.owner = THIS_MODULE,
.flags = PNFS_LAYOUTRET_ON_SETATTR |
PNFS_LAYOUTRET_ON_ERROR |
PNFS_READ_WHOLE_PAGE,
.read_pagelist = bl_read_pagelist,
.write_pagelist = bl_write_pagelist,
@ -910,6 +911,7 @@ static struct pnfs_layoutdriver_type scsilayout_type = {
.name = "LAYOUT_SCSI",
.owner = THIS_MODULE,
.flags = PNFS_LAYOUTRET_ON_SETATTR |
PNFS_LAYOUTRET_ON_ERROR |
PNFS_READ_WHOLE_PAGE,
.read_pagelist = bl_read_pagelist,
.write_pagelist = bl_write_pagelist,

4
fs/nfs/pnfs.h
View File

@ -524,8 +524,10 @@ static inline int pnfs_return_layout(struct inode *ino)
struct nfs_inode *nfsi = NFS_I(ino);
struct nfs_server *nfss = NFS_SERVER(ino);
if (pnfs_enabled_sb(nfss) && nfsi->layout)
if (pnfs_enabled_sb(nfss) && nfsi->layout) {
set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags);
return _pnfs_return_layout(ino);
}
return 0;
}