UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

pNFS/flexfiles: Ensure we initialise the mirror bsizes correctly on read 

While it is true that reading from an unmirrored source always uses
index 0, that is no longer true for mirrored sources when we fail over.

Fixes: 563c53e73b ("NFS: Fix flexfiles read failover")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2020-09-18 08:58:58 -04:00
parent 16abd2a0c1
commit ee15c7b53e
1 changed files with 6 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
fs/nfs/flexfilelayout/flexfilelayout.c
View File

@ -838,6 +838,7 @@ ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio,
struct nfs4_ff_layout_mirror *mirror;
struct nfs4_pnfs_ds *ds;
int ds_idx;
u32 i;
retry:
ff_layout_pg_check_layout(pgio, req);
@ -863,14 +864,14 @@ retry:
goto retry;
}
mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx);
for (i = 0; i < pgio->pg_mirror_count; i++) {
mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i);
pgm = &pgio->pg_mirrors[i];
pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize;
}
pgio->pg_mirror_idx = ds_idx;
/* read always uses only one mirror - idx 0 for pgio layer */
pgm = &pgio->pg_mirrors[0];
pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize;
if (NFS_SERVER(pgio->pg_inode)->flags &
(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))
pgio->pg_maxretrans = io_maxretrans;