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authorDavid S. Miller <davem@davemloft.net>2011-07-06 08:23:37 +0200
committerDavid S. Miller <davem@davemloft.net>2011-07-06 08:23:37 +0200
commite12fe68ce34d60c04bb1ddb1d3cc5c3022388fe4 (patch)
tree83c0e192ccaa4752c80b6131a7d0aa8272b5d0d0 /fs/nfs/pnfs.c
parentb44: Use pr_<level>_once and DRV_DESCRIPTION (diff)
parentnet: vlan: enable soft features regardless of underlying device (diff)
downloadlinux-e12fe68ce34d60c04bb1ddb1d3cc5c3022388fe4.tar.xz
linux-e12fe68ce34d60c04bb1ddb1d3cc5c3022388fe4.zip
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Diffstat (limited to 'fs/nfs/pnfs.c')
-rw-r--r--fs/nfs/pnfs.c44
1 files changed, 31 insertions, 13 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 8c1309d852a6..29c0ca7fc347 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -634,14 +634,16 @@ _pnfs_return_layout(struct inode *ino)
spin_lock(&ino->i_lock);
lo = nfsi->layout;
- if (!lo || !mark_matching_lsegs_invalid(lo, &tmp_list, NULL)) {
+ if (!lo) {
spin_unlock(&ino->i_lock);
- dprintk("%s: no layout segments to return\n", __func__);
- goto out;
+ dprintk("%s: no layout to return\n", __func__);
+ return status;
}
stateid = nfsi->layout->plh_stateid;
/* Reference matched in nfs4_layoutreturn_release */
get_layout_hdr(lo);
+ mark_matching_lsegs_invalid(lo, &tmp_list, NULL);
+ lo->plh_block_lgets++;
spin_unlock(&ino->i_lock);
pnfs_free_lseg_list(&tmp_list);
@@ -650,6 +652,9 @@ _pnfs_return_layout(struct inode *ino)
lrp = kzalloc(sizeof(*lrp), GFP_KERNEL);
if (unlikely(lrp == NULL)) {
status = -ENOMEM;
+ set_bit(NFS_LAYOUT_RW_FAILED, &lo->plh_flags);
+ set_bit(NFS_LAYOUT_RO_FAILED, &lo->plh_flags);
+ put_layout_hdr(lo);
goto out;
}
@@ -887,7 +892,7 @@ pnfs_find_lseg(struct pnfs_layout_hdr *lo,
ret = get_lseg(lseg);
break;
}
- if (cmp_layout(range, &lseg->pls_range) > 0)
+ if (lseg->pls_range.offset > range->offset)
break;
}
@@ -1059,23 +1064,36 @@ pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
gfp_flags = GFP_NOFS;
}
- if (pgio->pg_count == prev->wb_bytes) {
+ if (pgio->pg_lseg == NULL) {
+ if (pgio->pg_count != prev->wb_bytes)
+ return true;
/* This is first coelesce call for a series of nfs_pages */
pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
prev->wb_context,
- req_offset(req),
+ req_offset(prev),
pgio->pg_count,
access_type,
gfp_flags);
- return true;
+ if (pgio->pg_lseg == NULL)
+ return true;
}
- if (pgio->pg_lseg &&
- req_offset(req) > end_offset(pgio->pg_lseg->pls_range.offset,
- pgio->pg_lseg->pls_range.length))
- return false;
-
- return true;
+ /*
+ * Test if a nfs_page is fully contained in the pnfs_layout_range.
+ * Note that this test makes several assumptions:
+ * - that the previous nfs_page in the struct nfs_pageio_descriptor
+ * is known to lie within the range.
+ * - that the nfs_page being tested is known to be contiguous with the
+ * previous nfs_page.
+ * - Layout ranges are page aligned, so we only have to test the
+ * start offset of the request.
+ *
+ * Please also note that 'end_offset' is actually the offset of the
+ * first byte that lies outside the pnfs_layout_range. FIXME?
+ *
+ */
+ return req_offset(req) < end_offset(pgio->pg_lseg->pls_range.offset,
+ pgio->pg_lseg->pls_range.length);
}
EXPORT_SYMBOL_GPL(pnfs_generic_pg_test);