From: Trond Myklebust <trondmy@gmail.com>
To: linux-nfs@vger.kernel.org
Subject: [PATCH 05/19] pnfs: refactor send_layoutget
Date: Wed, 30 May 2018 14:05:39 -0400 [thread overview]
Message-ID: <20180530180553.38769-6-trond.myklebust@hammerspace.com> (raw)
In-Reply-To: <20180530180553.38769-5-trond.myklebust@hammerspace.com>
From: Fred Isaman <fred.isaman@gmail.com>
Pull out the alloc/init part for eventual reuse by OPEN.
Signed-off-by: Fred Isaman <fred.isaman@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
fs/nfs/pnfs.c | 33 +++++++++++++++------------------
1 file changed, 15 insertions(+), 18 deletions(-)
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index ee723aa153a3..2c955c389ecf 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -915,18 +915,12 @@ pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo)
test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags);
}
-/*
- * Get layout from server.
- * for now, assume that whole file layouts are requested.
- * arg->offset: 0
- * arg->length: all ones
- */
-static struct pnfs_layout_segment *
-send_layoutget(struct pnfs_layout_hdr *lo,
+static struct nfs4_layoutget *
+pnfs_alloc_init_layoutget_args(struct pnfs_layout_hdr *lo,
struct nfs_open_context *ctx,
nfs4_stateid *stateid,
const struct pnfs_layout_range *range,
- long *timeout, gfp_t gfp_flags)
+ gfp_t gfp_flags)
{
struct inode *ino = lo->plh_inode;
struct nfs_server *server = NFS_SERVER(ino);
@@ -935,14 +929,9 @@ send_layoutget(struct pnfs_layout_hdr *lo,
dprintk("--> %s\n", __func__);
- /*
- * Synchronously retrieve layout information from server and
- * store in lseg. If we race with a concurrent seqid morphing
- * op, then re-send the LAYOUTGET.
- */
lgp = kzalloc(sizeof(*lgp), gfp_flags);
if (lgp == NULL)
- return ERR_PTR(-ENOMEM);
+ return NULL;
i_size = i_size_read(ino);
@@ -963,8 +952,7 @@ send_layoutget(struct pnfs_layout_hdr *lo,
nfs4_stateid_copy(&lgp->args.stateid, stateid);
lgp->gfp_flags = gfp_flags;
lgp->cred = lo->plh_lc_cred;
-
- return nfs4_proc_layoutget(lgp, timeout, gfp_flags);
+ return lgp;
}
static void pnfs_clear_layoutcommit(struct inode *inode,
@@ -1694,6 +1682,7 @@ pnfs_update_layout(struct inode *ino,
struct nfs_client *clp = server->nfs_client;
struct pnfs_layout_hdr *lo = NULL;
struct pnfs_layout_segment *lseg = NULL;
+ struct nfs4_layoutget *lgp;
nfs4_stateid stateid;
long timeout = 0;
unsigned long giveup = jiffies + (clp->cl_lease_time << 1);
@@ -1838,7 +1827,15 @@ pnfs_update_layout(struct inode *ino,
if (arg.length != NFS4_MAX_UINT64)
arg.length = PAGE_ALIGN(arg.length);
- lseg = send_layoutget(lo, ctx, &stateid, &arg, &timeout, gfp_flags);
+ lgp = pnfs_alloc_init_layoutget_args(lo, ctx, &stateid, &arg, gfp_flags);
+ if (!lgp) {
+ trace_pnfs_update_layout(ino, pos, count, iomode, lo, NULL,
+ PNFS_UPDATE_LAYOUT_NOMEM);
+ atomic_dec(&lo->plh_outstanding);
+ goto out_put_layout_hdr;
+ }
+
+ lseg = nfs4_proc_layoutget(lgp, &timeout, gfp_flags);
trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg,
PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET);
atomic_dec(&lo->plh_outstanding);
--
2.17.0
next prev parent reply other threads:[~2018-05-30 18:06 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-30 18:05 [PATCH 00/19] Layoutget on OPEN Trond Myklebust
2018-05-30 18:05 ` [PATCH 01/19] pnfs: Remove redundant assignment from nfs4_proc_layoutget() Trond Myklebust
2018-05-30 18:05 ` [PATCH 02/19] pnfs: Store return value of decode_layoutget for later processing Trond Myklebust
2018-05-30 18:05 ` [PATCH 03/19] NFS4: move ctx into nfs4_run_open_task Trond Myklebust
2018-05-30 18:05 ` [PATCH 04/19] pnfs: Add layout driver flag PNFS_LAYOUTGET_ON_OPEN Trond Myklebust
2018-05-30 18:05 ` Trond Myklebust [this message]
2018-05-30 18:05 ` [PATCH 06/19] pnfs: move allocations out of nfs4_proc_layoutget Trond Myklebust
2018-05-30 18:05 ` [PATCH 07/19] pnfs: Add conditional encode/decode of LAYOUTGET within OPEN compound Trond Myklebust
2018-05-30 18:05 ` [PATCH 08/19] pnfs: Move nfs4_opendata into nfs4_fs.h Trond Myklebust
2018-05-30 18:05 ` [PATCH 09/19] pnfs: Change pnfs_alloc_init_layoutget_args call signature Trond Myklebust
2018-05-30 18:05 ` [PATCH 10/19] pnfs: Add LAYOUTGET to OPEN of a new file Trond Myklebust
2018-05-30 18:05 ` [PATCH 11/19] pnfs: Add LAYOUTGET to OPEN of an existing file Trond Myklebust
2018-05-30 18:05 ` [PATCH 12/19] pnfs: Stop attempting LAYOUTGET on OPEN on failure Trond Myklebust
2018-05-30 18:05 ` [PATCH 13/19] pnfs: Add barrier to prevent lgopen using LAYOUTGET during recall Trond Myklebust
2018-05-30 18:05 ` [PATCH 14/19] pnfs: Fix manipulation of NFS_LAYOUT_FIRST_LAYOUTGET Trond Myklebust
2018-05-30 18:05 ` [PATCH 15/19] NFSv4/pnfs: Ensure pnfs_parse_lgopen() won't try to parse uninitialised data Trond Myklebust
2018-05-30 18:05 ` [PATCH 16/19] NFSv4/pnfs: Don't switch off layoutget-on-open for transient errors Trond Myklebust
2018-05-30 18:05 ` [PATCH 17/19] pNFS: Don't send LAYOUTGET on OPEN for read, if we already have cached data Trond Myklebust
2018-05-30 18:05 ` [PATCH 18/19] pnfs: Don't call commit on failed layoutget-on-open Trond Myklebust
2018-05-30 18:05 ` [PATCH 19/19] pnfs: Don't release the sequence slot until we've processed layoutget on open Trond Myklebust
2018-05-30 20:10 ` [PATCH 04/19] pnfs: Add layout driver flag PNFS_LAYOUTGET_ON_OPEN Olga Kornievskaia
2018-05-31 12:40 ` Trond Myklebust
2019-09-06 20:17 ` Olga Kornievskaia
2018-05-30 18:25 ` [PATCH 00/19] Layoutget on OPEN Olga Kornievskaia
2018-05-30 18:36 ` Trond Myklebust
2018-05-30 18:37 ` Olga Kornievskaia
2018-05-30 19:27 ` Olga Kornievskaia
2018-05-30 19:29 ` Olga Kornievskaia
2018-05-30 19:47 ` Olga Kornievskaia
2018-05-30 22:33 ` Trond Myklebust
2018-05-31 18:59 ` J. Bruce Fields
2018-06-01 0:28 ` Trond Myklebust
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