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pNFS/flexfiles: Check the layout segment range before doing I/O

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When starting to read or write with a layout segment, check that the
range matches our request.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust
2020-03-23 14:48:23 -04:00
parent 660d1eb223
commit e1e54ab710
3 changed files with 13 additions and 3 deletions
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12
fs/nfs/flexfilelayout/flexfilelayout.c
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@@ -830,6 +830,14 @@ ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio,
}
}
static void
ff_layout_pg_check_layout(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req)
{
pnfs_generic_pg_check_layout(pgio);
pnfs_generic_pg_check_range(pgio, req);
}
static void
ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req)
@@ -840,7 +848,7 @@ ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio,
int ds_idx;
retry:
pnfs_generic_pg_check_layout(pgio);
ff_layout_pg_check_layout(pgio, req);
/* Use full layout for now */
if (!pgio->pg_lseg) {
ff_layout_pg_get_read(pgio, req, false);
@@ -900,7 +908,7 @@ ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio,
int i;
retry:
pnfs_generic_pg_check_layout(pgio);
ff_layout_pg_check_layout(pgio, req);
if (!pgio->pg_lseg) {
pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
nfs_req_openctx(req),