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pNFS/flexfiles: Fix up the ff_layout_write_pagelist failure path

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If the attempt to write through pNFS fails, we need to use the same
failure semantics as for the read path: If the FF_FLAGS_NO_IO_THRU_MDS
flag is set or we have sufficient valid DSes, then we must retry through
pNFS

Fixes: d67ae825a5 ("pnfs/flexfiles: Add the FlexFile Layout Driver")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2017-04-29 00:02:37 -04:00
parent bdebfccd0e
commit 37f8aa16da
2 changed files with 21 additions and 4 deletions
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11
fs/nfs/flexfilelayout/flexfilelayout.c
View File

@ -1802,16 +1802,16 @@ ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
ds = nfs4_ff_layout_prepare_ds(lseg, idx, true);
if (!ds)
return PNFS_NOT_ATTEMPTED;
goto out_failed;
ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp,
hdr->inode);
if (IS_ERR(ds_clnt))
return PNFS_NOT_ATTEMPTED;
goto out_failed;
ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred);
if (!ds_cred)
return PNFS_NOT_ATTEMPTED;
goto out_failed;
vers = nfs4_ff_layout_ds_version(lseg, idx);
@ -1841,6 +1841,11 @@ ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
sync, RPC_TASK_SOFTCONN);
put_rpccred(ds_cred);
return PNFS_ATTEMPTED;
out_failed:
if (ff_layout_avoid_mds_available_ds(lseg))
return PNFS_TRY_AGAIN;
return PNFS_NOT_ATTEMPTED;
}
static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)

14
fs/nfs/pnfs.c
View File

@ -2292,8 +2292,20 @@ pnfs_do_write(struct nfs_pageio_descriptor *desc,
enum pnfs_try_status trypnfs;
trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how);
if (trypnfs == PNFS_NOT_ATTEMPTED)
switch (trypnfs) {
case PNFS_NOT_ATTEMPTED:
pnfs_write_through_mds(desc, hdr);
case PNFS_ATTEMPTED:
break;
case PNFS_TRY_AGAIN:
/* cleanup hdr and prepare to redo pnfs */
if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
list_splice_init(&hdr->pages, &mirror->pg_list);
mirror->pg_recoalesce = 1;
}
hdr->mds_ops->rpc_release(hdr);
}
}
static void pnfs_writehdr_free(struct nfs_pgio_header *hdr)