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authorTrond Myklebust <trond.myklebust@hammerspace.com>2020-08-05 15:03:56 +0200
committerTrond Myklebust <trond.myklebust@hammerspace.com>2020-08-12 15:46:06 +0200
commitd474f96104bd4377573526ebae2ee212205a6839 (patch)
tree30c6b8c6050de9fb4fd8f063941943f4a0a83649 /fs
parentNFS: Don't move layouts to plh_return_segs list while in use (diff)
downloadlinux-d474f96104bd4377573526ebae2ee212205a6839.tar.xz
linux-d474f96104bd4377573526ebae2ee212205a6839.zip
NFS: Don't return layout segments that are in use
If the NFS_LAYOUT_RETURN_REQUESTED flag is set, we want to return the layout as soon as possible, meaning that the affected layout segments should be marked as invalid, and should no longer be in use for I/O. Fixes: f0b429819b5f ("pNFS: Ignore non-recalled layouts in pnfs_layout_need_return()") Cc: stable@vger.kernel.org # v4.19+ Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/pnfs.c34
1 files changed, 15 insertions, 19 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 262ce01c7abe..b5baf36d4de5 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1226,31 +1226,27 @@ out:
return status;
}
+static bool
+pnfs_layout_segments_returnable(struct pnfs_layout_hdr *lo,
+ enum pnfs_iomode iomode,
+ u32 seq)
+{
+ struct pnfs_layout_range recall_range = {
+ .length = NFS4_MAX_UINT64,
+ .iomode = iomode,
+ };
+ return pnfs_mark_matching_lsegs_return(lo, &lo->plh_return_segs,
+ &recall_range, seq) != -EBUSY;
+}
+
/* Return true if layoutreturn is needed */
static bool
pnfs_layout_need_return(struct pnfs_layout_hdr *lo)
{
- struct pnfs_layout_segment *s;
- enum pnfs_iomode iomode;
- u32 seq;
-
if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags))
return false;
-
- seq = lo->plh_return_seq;
- iomode = lo->plh_return_iomode;
-
- /* Defer layoutreturn until all recalled lsegs are done */
- list_for_each_entry(s, &lo->plh_segs, pls_list) {
- if (seq && pnfs_seqid_is_newer(s->pls_seq, seq))
- continue;
- if (iomode != IOMODE_ANY && s->pls_range.iomode != iomode)
- continue;
- if (test_bit(NFS_LSEG_LAYOUTRETURN, &s->pls_flags))
- return false;
- }
-
- return true;
+ return pnfs_layout_segments_returnable(lo, lo->plh_return_iomode,
+ lo->plh_return_seq);
}
static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo)