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Diffstat (limited to 'fs/nfs/direct.c')
-rw-r--r--fs/nfs/direct.c117
1 files changed, 105 insertions, 12 deletions
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index b8797ae6831f..4ad7bc388679 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -108,6 +108,97 @@ static inline int put_dreq(struct nfs_direct_req *dreq)
return atomic_dec_and_test(&dreq->io_count);
}
+/*
+ * nfs_direct_select_verf - select the right verifier
+ * @dreq - direct request possibly spanning multiple servers
+ * @ds_clp - nfs_client of data server or NULL if MDS / non-pnfs
+ * @ds_idx - index of data server in data server list, only valid if ds_clp set
+ *
+ * returns the correct verifier to use given the role of the server
+ */
+static struct nfs_writeverf *
+nfs_direct_select_verf(struct nfs_direct_req *dreq,
+ struct nfs_client *ds_clp,
+ int ds_idx)
+{
+ struct nfs_writeverf *verfp = &dreq->verf;
+
+#ifdef CONFIG_NFS_V4_1
+ if (ds_clp) {
+ /* pNFS is in use, use the DS verf */
+ if (ds_idx >= 0 && ds_idx < dreq->ds_cinfo.nbuckets)
+ verfp = &dreq->ds_cinfo.buckets[ds_idx].direct_verf;
+ else
+ WARN_ON_ONCE(1);
+ }
+#endif
+ return verfp;
+}
+
+
+/*
+ * nfs_direct_set_hdr_verf - set the write/commit verifier
+ * @dreq - direct request possibly spanning multiple servers
+ * @hdr - pageio header to validate against previously seen verfs
+ *
+ * Set the server's (MDS or DS) "seen" verifier
+ */
+static void nfs_direct_set_hdr_verf(struct nfs_direct_req *dreq,
+ struct nfs_pgio_header *hdr)
+{
+ struct nfs_writeverf *verfp;
+
+ verfp = nfs_direct_select_verf(dreq, hdr->data->ds_clp,
+ hdr->data->ds_idx);
+ WARN_ON_ONCE(verfp->committed >= 0);
+ memcpy(verfp, &hdr->verf, sizeof(struct nfs_writeverf));
+ WARN_ON_ONCE(verfp->committed < 0);
+}
+
+/*
+ * nfs_direct_cmp_hdr_verf - compare verifier for pgio header
+ * @dreq - direct request possibly spanning multiple servers
+ * @hdr - pageio header to validate against previously seen verf
+ *
+ * set the server's "seen" verf if not initialized.
+ * returns result of comparison between @hdr->verf and the "seen"
+ * verf of the server used by @hdr (DS or MDS)
+ */
+static int nfs_direct_set_or_cmp_hdr_verf(struct nfs_direct_req *dreq,
+ struct nfs_pgio_header *hdr)
+{
+ struct nfs_writeverf *verfp;
+
+ verfp = nfs_direct_select_verf(dreq, hdr->data->ds_clp,
+ hdr->data->ds_idx);
+ if (verfp->committed < 0) {
+ nfs_direct_set_hdr_verf(dreq, hdr);
+ return 0;
+ }
+ return memcmp(verfp, &hdr->verf, sizeof(struct nfs_writeverf));
+}
+
+#if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4)
+/*
+ * nfs_direct_cmp_commit_data_verf - compare verifier for commit data
+ * @dreq - direct request possibly spanning multiple servers
+ * @data - commit data to validate against previously seen verf
+ *
+ * returns result of comparison between @data->verf and the verf of
+ * the server used by @data (DS or MDS)
+ */
+static int nfs_direct_cmp_commit_data_verf(struct nfs_direct_req *dreq,
+ struct nfs_commit_data *data)
+{
+ struct nfs_writeverf *verfp;
+
+ verfp = nfs_direct_select_verf(dreq, data->ds_clp,
+ data->ds_commit_index);
+ WARN_ON_ONCE(verfp->committed < 0);
+ return memcmp(verfp, &data->verf, sizeof(struct nfs_writeverf));
+}
+#endif
+
/**
* nfs_direct_IO - NFS address space operation for direct I/O
* @rw: direction (read or write)
@@ -168,6 +259,7 @@ static inline struct nfs_direct_req *nfs_direct_req_alloc(void)
kref_get(&dreq->kref);
init_completion(&dreq->completion);
INIT_LIST_HEAD(&dreq->mds_cinfo.list);
+ dreq->verf.committed = NFS_INVALID_STABLE_HOW; /* not set yet */
INIT_WORK(&dreq->work, nfs_direct_write_schedule_work);
spin_lock_init(&dreq->lock);
@@ -380,8 +472,7 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_pageio_descriptor *de
struct nfs_page *req;
unsigned int req_len = min_t(size_t, bytes, PAGE_SIZE - pgbase);
/* XXX do we need to do the eof zeroing found in async_filler? */
- req = nfs_create_request(dreq->ctx, dreq->inode,
- pagevec[i],
+ req = nfs_create_request(dreq->ctx, pagevec[i], NULL,
pgbase, req_len);
if (IS_ERR(req)) {
result = PTR_ERR(req);
@@ -424,7 +515,7 @@ static ssize_t nfs_direct_read_schedule_iovec(struct nfs_direct_req *dreq,
size_t requested_bytes = 0;
unsigned long seg;
- NFS_PROTO(dreq->inode)->read_pageio_init(&desc, dreq->inode,
+ nfs_pageio_init_read(&desc, dreq->inode, false,
&nfs_direct_read_completion_ops);
get_dreq(dreq);
desc.pg_dreq = dreq;
@@ -564,7 +655,7 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
dreq->count = 0;
get_dreq(dreq);
- NFS_PROTO(dreq->inode)->write_pageio_init(&desc, dreq->inode, FLUSH_STABLE,
+ nfs_pageio_init_write(&desc, dreq->inode, FLUSH_STABLE, false,
&nfs_direct_write_completion_ops);
desc.pg_dreq = dreq;
@@ -603,7 +694,7 @@ static void nfs_direct_commit_complete(struct nfs_commit_data *data)
dprintk("NFS: %5u commit failed with error %d.\n",
data->task.tk_pid, status);
dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
- } else if (memcmp(&dreq->verf, &data->verf, sizeof(data->verf))) {
+ } else if (nfs_direct_cmp_commit_data_verf(dreq, data)) {
dprintk("NFS: %5u commit verify failed\n", data->task.tk_pid);
dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
}
@@ -750,8 +841,7 @@ static ssize_t nfs_direct_write_schedule_segment(struct nfs_pageio_descriptor *d
struct nfs_page *req;
unsigned int req_len = min_t(size_t, bytes, PAGE_SIZE - pgbase);
- req = nfs_create_request(dreq->ctx, dreq->inode,
- pagevec[i],
+ req = nfs_create_request(dreq->ctx, pagevec[i], NULL,
pgbase, req_len);
if (IS_ERR(req)) {
result = PTR_ERR(req);
@@ -813,13 +903,13 @@ static void nfs_direct_write_completion(struct nfs_pgio_header *hdr)
if (dreq->flags == NFS_ODIRECT_RESCHED_WRITES)
bit = NFS_IOHDR_NEED_RESCHED;
else if (dreq->flags == 0) {
- memcpy(&dreq->verf, hdr->verf,
- sizeof(dreq->verf));
+ nfs_direct_set_hdr_verf(dreq, hdr);
bit = NFS_IOHDR_NEED_COMMIT;
dreq->flags = NFS_ODIRECT_DO_COMMIT;
} else if (dreq->flags == NFS_ODIRECT_DO_COMMIT) {
- if (memcmp(&dreq->verf, hdr->verf, sizeof(dreq->verf))) {
- dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
+ if (nfs_direct_set_or_cmp_hdr_verf(dreq, hdr)) {
+ dreq->flags =
+ NFS_ODIRECT_RESCHED_WRITES;
bit = NFS_IOHDR_NEED_RESCHED;
} else
bit = NFS_IOHDR_NEED_COMMIT;
@@ -829,6 +919,8 @@ static void nfs_direct_write_completion(struct nfs_pgio_header *hdr)
spin_unlock(&dreq->lock);
while (!list_empty(&hdr->pages)) {
+ bool do_destroy = true;
+
req = nfs_list_entry(hdr->pages.next);
nfs_list_remove_request(req);
switch (bit) {
@@ -836,6 +928,7 @@ static void nfs_direct_write_completion(struct nfs_pgio_header *hdr)
case NFS_IOHDR_NEED_COMMIT:
kref_get(&req->wb_kref);
nfs_mark_request_commit(req, hdr->lseg, &cinfo);
+ do_destroy = false;
}
nfs_unlock_and_release_request(req);
}
@@ -874,7 +967,7 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
size_t requested_bytes = 0;
unsigned long seg;
- NFS_PROTO(inode)->write_pageio_init(&desc, inode, FLUSH_COND_STABLE,
+ nfs_pageio_init_write(&desc, inode, FLUSH_COND_STABLE, false,
&nfs_direct_write_completion_ops);
desc.pg_dreq = dreq;
get_dreq(dreq);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-12 13:03:30 +0000