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pnfs: layoutret_on_setattr

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With the objects layout security model, we have object capabilities
that are associated with the layout and we anticipate that the server
will issue a cb_layoutrecall for any setattr that changes security
related attributes (user/group/mode/acl) or truncates the file.

Therefore, the layout is returned before issuing the setattr to avoid
the anticipated cb_layoutrecall.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
This commit is contained in:
Benny Halevy
2010-07-14 15:43:57 -04:00
committed by Boaz Harrosh
parent cbe8260369
commit 8a1636c459
3 changed files with 26 additions and 0 deletions
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fs/nfs/objlayout/objio_osd.c
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@@ -964,6 +964,7 @@ objlayout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
static struct pnfs_layoutdriver_type objlayout_type = {
.id = LAYOUT_OSD2_OBJECTS,
.name = "LAYOUT_OSD2_OBJECTS",
.flags = PNFS_LAYOUTRET_ON_SETATTR,
.alloc_layout_hdr = objlayout_alloc_layout_hdr,
.free_layout_hdr = objlayout_free_layout_hdr,