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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2018-08-21 10:25:33 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2018-08-21 13:39:05 -0400 |
| commit | 1c1aeaf1432f51b57341741dcb76a3825d63a168 (patch) | |
| tree | 66a3efccd02839a15a60f3b975fe739f321295ce /fs/nfs | |
| parent | ea51f94b45a0fd657c61206c1b648cc72f95befa (diff) | |
| download | linux-1c1aeaf1432f51b57341741dcb76a3825d63a168.tar.bz2 | |
pNFS/flexfiles: ff_layout_pg_init_read should exit on error
If we get an error while retrieving the layout, then we should
report it rather than falling back to I/O through the MDS.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/flexfilelayout/flexfilelayout.c | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index 280b6b060d53..cae43333ef16 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -812,7 +812,6 @@ ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req, bool strict_iomode) { -retry_strict: pnfs_put_lseg(pgio->pg_lseg); pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, req->wb_context, @@ -825,16 +824,6 @@ retry_strict: pgio->pg_error = PTR_ERR(pgio->pg_lseg); pgio->pg_lseg = NULL; } - - /* If we don't have checking, do get a IOMODE_RW - * segment, and the server wants to avoid READs - * there, then retry! - */ - if (pgio->pg_lseg && !strict_iomode && - ff_layout_avoid_read_on_rw(pgio->pg_lseg)) { - strict_iomode = true; - goto retry_strict; - } } static void @@ -849,14 +838,16 @@ ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio, retry: pnfs_generic_pg_check_layout(pgio); /* Use full layout for now */ - if (!pgio->pg_lseg) + if (!pgio->pg_lseg) { ff_layout_pg_get_read(pgio, req, false); - else if (ff_layout_avoid_read_on_rw(pgio->pg_lseg)) + if (!pgio->pg_lseg) + goto out_nolseg; + } + if (ff_layout_avoid_read_on_rw(pgio->pg_lseg)) { ff_layout_pg_get_read(pgio, req, true); - - /* If no lseg, fall back to read through mds */ - if (pgio->pg_lseg == NULL) - goto out_mds; + if (!pgio->pg_lseg) + goto out_nolseg; + } ds = ff_layout_choose_best_ds_for_read(pgio->pg_lseg, 0, &ds_idx); if (!ds) { @@ -878,6 +869,9 @@ retry: pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize; return; +out_nolseg: + if (pgio->pg_error < 0) + return; out_mds: pnfs_put_lseg(pgio->pg_lseg); pgio->pg_lseg = NULL; |