}
}
-static void filelayout_fenceme(struct inode *inode, struct pnfs_layout_hdr *lo)
-{
- if (!test_and_clear_bit(NFS_LAYOUT_RETURN, &lo->plh_flags))
- return;
- pnfs_return_layout(inode);
-}
-
static int filelayout_async_handle_error(struct rpc_task *task,
struct nfs4_state *state,
struct nfs_client *clp,
rpc_count_iostats(task, NFS_SERVER(hdr->inode)->client->cl_metrics);
}
-static void filelayout_read_release(void *data)
-{
- struct nfs_pgio_header *hdr = data;
- struct pnfs_layout_hdr *lo = hdr->lseg->pls_layout;
-
- filelayout_fenceme(lo->plh_inode, lo);
- nfs_put_client(hdr->ds_clp);
- hdr->mds_ops->rpc_release(data);
-}
-
static int filelayout_write_done_cb(struct rpc_task *task,
struct nfs_pgio_header *hdr)
{
return 0;
}
-/* Fake up some data that will cause nfs_commit_release to retry the writes. */
-static void prepare_to_resend_writes(struct nfs_commit_data *data)
-{
- struct nfs_page *first = nfs_list_entry(data->pages.next);
-
- data->task.tk_status = 0;
- memcpy(&data->verf.verifier, &first->wb_verf,
- sizeof(data->verf.verifier));
- data->verf.verifier.data[0]++; /* ensure verifier mismatch */
-}
-
static int filelayout_commit_done_cb(struct rpc_task *task,
struct nfs_commit_data *data)
{
switch (err) {
case -NFS4ERR_RESET_TO_MDS:
- prepare_to_resend_writes(data);
+ pnfs_generic_prepare_to_resend_writes(data);
return -EAGAIN;
case -EAGAIN:
rpc_restart_call_prepare(task);
rpc_count_iostats(task, NFS_SERVER(hdr->inode)->client->cl_metrics);
}
-static void filelayout_write_release(void *data)
-{
- struct nfs_pgio_header *hdr = data;
- struct pnfs_layout_hdr *lo = hdr->lseg->pls_layout;
-
- filelayout_fenceme(lo->plh_inode, lo);
- nfs_put_client(hdr->ds_clp);
- hdr->mds_ops->rpc_release(data);
-}
-
static void filelayout_commit_prepare(struct rpc_task *task, void *data)
{
struct nfs_commit_data *wdata = data;
task);
}
-static void filelayout_write_commit_done(struct rpc_task *task, void *data)
-{
- struct nfs_commit_data *wdata = data;
-
- /* Note this may cause RPC to be resent */
- wdata->mds_ops->rpc_call_done(task, data);
-}
-
static void filelayout_commit_count_stats(struct rpc_task *task, void *data)
{
struct nfs_commit_data *cdata = data;
rpc_count_iostats(task, NFS_SERVER(cdata->inode)->client->cl_metrics);
}
-static void filelayout_commit_release(void *calldata)
-{
- struct nfs_commit_data *data = calldata;
-
- data->completion_ops->completion(data);
- pnfs_put_lseg(data->lseg);
- nfs_put_client(data->ds_clp);
- nfs_commitdata_release(data);
-}
-
static const struct rpc_call_ops filelayout_read_call_ops = {
.rpc_call_prepare = filelayout_read_prepare,
.rpc_call_done = filelayout_read_call_done,
.rpc_count_stats = filelayout_read_count_stats,
- .rpc_release = filelayout_read_release,
+ .rpc_release = pnfs_generic_rw_release,
};
static const struct rpc_call_ops filelayout_write_call_ops = {
.rpc_call_prepare = filelayout_write_prepare,
.rpc_call_done = filelayout_write_call_done,
.rpc_count_stats = filelayout_write_count_stats,
- .rpc_release = filelayout_write_release,
+ .rpc_release = pnfs_generic_rw_release,
};
static const struct rpc_call_ops filelayout_commit_call_ops = {
.rpc_call_prepare = filelayout_commit_prepare,
- .rpc_call_done = filelayout_write_commit_done,
+ .rpc_call_done = pnfs_generic_write_commit_done,
.rpc_count_stats = filelayout_commit_count_stats,
- .rpc_release = filelayout_commit_release,
+ .rpc_release = pnfs_generic_commit_release,
};
static enum pnfs_try_status
return j;
}
-/* The generic layer is about to remove the req from the commit list.
- * If this will make the bucket empty, it will need to put the lseg reference.
- * Note this is must be called holding the inode (/cinfo) lock
- */
-static void
-filelayout_clear_request_commit(struct nfs_page *req,
- struct nfs_commit_info *cinfo)
-{
- struct pnfs_layout_segment *freeme = NULL;
-
- if (!test_and_clear_bit(PG_COMMIT_TO_DS, &req->wb_flags))
- goto out;
- cinfo->ds->nwritten--;
- if (list_is_singular(&req->wb_list)) {
- struct pnfs_commit_bucket *bucket;
-
- bucket = list_first_entry(&req->wb_list,
- struct pnfs_commit_bucket,
- written);
- freeme = bucket->wlseg;
- bucket->wlseg = NULL;
- }
-out:
- nfs_request_remove_commit_list(req, cinfo);
- pnfs_put_lseg_locked(freeme);
-}
-
static void
filelayout_mark_request_commit(struct nfs_page *req,
struct pnfs_layout_segment *lseg,
* is normally transferred to the COMMIT call and released
* there. It could also be released if the last req is pulled
* off due to a rewrite, in which case it will be done in
- * filelayout_clear_request_commit
+ * pnfs_generic_clear_request_commit
*/
buckets[i].wlseg = pnfs_get_lseg(lseg);
}
&filelayout_commit_call_ops, how,
RPC_TASK_SOFTCONN);
out_err:
- prepare_to_resend_writes(data);
- filelayout_commit_release(data);
+ pnfs_generic_prepare_to_resend_writes(data);
+ pnfs_generic_commit_release(data);
return -EAGAIN;
}
-static int
-transfer_commit_list(struct list_head *src, struct list_head *dst,
- struct nfs_commit_info *cinfo, int max)
-{
- struct nfs_page *req, *tmp;
- int ret = 0;
-
- list_for_each_entry_safe(req, tmp, src, wb_list) {
- if (!nfs_lock_request(req))
- continue;
- kref_get(&req->wb_kref);
- if (cond_resched_lock(cinfo->lock))
- list_safe_reset_next(req, tmp, wb_list);
- nfs_request_remove_commit_list(req, cinfo);
- clear_bit(PG_COMMIT_TO_DS, &req->wb_flags);
- nfs_list_add_request(req, dst);
- ret++;
- if ((ret == max) && !cinfo->dreq)
- break;
- }
- return ret;
-}
-
-/* Note called with cinfo->lock held. */
-static int
-filelayout_scan_ds_commit_list(struct pnfs_commit_bucket *bucket,
- struct nfs_commit_info *cinfo,
- int max)
-{
- struct list_head *src = &bucket->written;
- struct list_head *dst = &bucket->committing;
- int ret;
-
- ret = transfer_commit_list(src, dst, cinfo, max);
- if (ret) {
- cinfo->ds->nwritten -= ret;
- cinfo->ds->ncommitting += ret;
- bucket->clseg = bucket->wlseg;
- if (list_empty(src))
- bucket->wlseg = NULL;
- else
- pnfs_get_lseg(bucket->clseg);
- }
- return ret;
-}
-
-/* Move reqs from written to committing lists, returning count of number moved.
- * Note called with cinfo->lock held.
- */
-static int filelayout_scan_commit_lists(struct nfs_commit_info *cinfo,
- int max)
-{
- int i, rv = 0, cnt;
-
- for (i = 0; i < cinfo->ds->nbuckets && max != 0; i++) {
- cnt = filelayout_scan_ds_commit_list(&cinfo->ds->buckets[i],
- cinfo, max);
- max -= cnt;
- rv += cnt;
- }
- return rv;
-}
-
-/* Pull everything off the committing lists and dump into @dst */
-static void filelayout_recover_commit_reqs(struct list_head *dst,
- struct nfs_commit_info *cinfo)
-{
- struct pnfs_commit_bucket *b;
- struct pnfs_layout_segment *freeme;
- int i;
-
-restart:
- spin_lock(cinfo->lock);
- for (i = 0, b = cinfo->ds->buckets; i < cinfo->ds->nbuckets; i++, b++) {
- if (transfer_commit_list(&b->written, dst, cinfo, 0)) {
- freeme = b->wlseg;
- b->wlseg = NULL;
- spin_unlock(cinfo->lock);
- pnfs_put_lseg(freeme);
- goto restart;
- }
- }
- cinfo->ds->nwritten = 0;
- spin_unlock(cinfo->lock);
-}
-
/* filelayout_search_commit_reqs - Search lists in @cinfo for the head reqest
* for @page
* @cinfo - commit info for current inode
return NULL;
}
-static void filelayout_retry_commit(struct nfs_commit_info *cinfo, int idx)
-{
- struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
- struct pnfs_commit_bucket *bucket;
- struct pnfs_layout_segment *freeme;
- int i;
-
- for (i = idx; i < fl_cinfo->nbuckets; i++) {
- bucket = &fl_cinfo->buckets[i];
- if (list_empty(&bucket->committing))
- continue;
- nfs_retry_commit(&bucket->committing, bucket->clseg, cinfo);
- spin_lock(cinfo->lock);
- freeme = bucket->clseg;
- bucket->clseg = NULL;
- spin_unlock(cinfo->lock);
- pnfs_put_lseg(freeme);
- }
-}
-
-static unsigned int
-alloc_ds_commits(struct nfs_commit_info *cinfo, struct list_head *list)
-{
- struct pnfs_ds_commit_info *fl_cinfo;
- struct pnfs_commit_bucket *bucket;
- struct nfs_commit_data *data;
- int i;
- unsigned int nreq = 0;
-
- fl_cinfo = cinfo->ds;
- bucket = fl_cinfo->buckets;
- for (i = 0; i < fl_cinfo->nbuckets; i++, bucket++) {
- if (list_empty(&bucket->committing))
- continue;
- data = nfs_commitdata_alloc();
- if (!data)
- break;
- data->ds_commit_index = i;
- spin_lock(cinfo->lock);
- data->lseg = bucket->clseg;
- bucket->clseg = NULL;
- spin_unlock(cinfo->lock);
- list_add(&data->pages, list);
- nreq++;
- }
-
- /* Clean up on error */
- filelayout_retry_commit(cinfo, i);
- /* Caller will clean up entries put on list */
- return nreq;
-}
-
-/* This follows nfs_commit_list pretty closely */
static int
filelayout_commit_pagelist(struct inode *inode, struct list_head *mds_pages,
int how, struct nfs_commit_info *cinfo)
{
- struct nfs_commit_data *data, *tmp;
- LIST_HEAD(list);
- unsigned int nreq = 0;
-
- if (!list_empty(mds_pages)) {
- data = nfs_commitdata_alloc();
- if (data != NULL) {
- data->lseg = NULL;
- list_add(&data->pages, &list);
- nreq++;
- } else {
- nfs_retry_commit(mds_pages, NULL, cinfo);
- filelayout_retry_commit(cinfo, 0);
- cinfo->completion_ops->error_cleanup(NFS_I(inode));
- return -ENOMEM;
- }
- }
-
- nreq += alloc_ds_commits(cinfo, &list);
-
- if (nreq == 0) {
- cinfo->completion_ops->error_cleanup(NFS_I(inode));
- goto out;
- }
-
- atomic_add(nreq, &cinfo->mds->rpcs_out);
-
- list_for_each_entry_safe(data, tmp, &list, pages) {
- list_del_init(&data->pages);
- if (!data->lseg) {
- nfs_init_commit(data, mds_pages, NULL, cinfo);
- nfs_initiate_commit(NFS_CLIENT(inode), data,
- data->mds_ops, how, 0);
- } else {
- struct pnfs_commit_bucket *buckets;
-
- buckets = cinfo->ds->buckets;
- nfs_init_commit(data, &buckets[data->ds_commit_index].committing, data->lseg, cinfo);
- filelayout_initiate_commit(data, how);
- }
- }
-out:
- cinfo->ds->ncommitting = 0;
- return PNFS_ATTEMPTED;
+ return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo,
+ filelayout_initiate_commit);
}
+
static struct nfs4_deviceid_node *
filelayout_alloc_deviceid_node(struct nfs_server *server,
struct pnfs_device *pdev, gfp_t gfp_flags)
.pg_write_ops = &filelayout_pg_write_ops,
.get_ds_info = &filelayout_get_ds_info,
.mark_request_commit = filelayout_mark_request_commit,
- .clear_request_commit = filelayout_clear_request_commit,
- .scan_commit_lists = filelayout_scan_commit_lists,
- .recover_commit_reqs = filelayout_recover_commit_reqs,
+ .clear_request_commit = pnfs_generic_clear_request_commit,
+ .scan_commit_lists = pnfs_generic_scan_commit_lists,
+ .recover_commit_reqs = pnfs_generic_recover_commit_reqs,
.search_commit_reqs = filelayout_search_commit_reqs,
.commit_pagelist = filelayout_commit_pagelist,
.read_pagelist = filelayout_read_pagelist,
--- /dev/null
+/*
+ * Common NFS I/O operations for the pnfs file based
+ * layout drivers.
+ *
+ * Copyright (c) 2014, Primary Data, Inc. All rights reserved.
+ *
+ * Tom Haynes <loghyr@primarydata.com>
+ */
+
+#include <linux/nfs_fs.h>
+#include <linux/nfs_page.h>
+
+#include "internal.h"
+#include "pnfs.h"
+
+static void pnfs_generic_fenceme(struct inode *inode,
+ struct pnfs_layout_hdr *lo)
+{
+ if (!test_and_clear_bit(NFS_LAYOUT_RETURN, &lo->plh_flags))
+ return;
+ pnfs_return_layout(inode);
+}
+
+void pnfs_generic_rw_release(void *data)
+{
+ struct nfs_pgio_header *hdr = data;
+ struct pnfs_layout_hdr *lo = hdr->lseg->pls_layout;
+
+ pnfs_generic_fenceme(lo->plh_inode, lo);
+ nfs_put_client(hdr->ds_clp);
+ hdr->mds_ops->rpc_release(data);
+}
+EXPORT_SYMBOL_GPL(pnfs_generic_rw_release);
+
+/* Fake up some data that will cause nfs_commit_release to retry the writes. */
+void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data)
+{
+ struct nfs_page *first = nfs_list_entry(data->pages.next);
+
+ data->task.tk_status = 0;
+ memcpy(&data->verf.verifier, &first->wb_verf,
+ sizeof(data->verf.verifier));
+ data->verf.verifier.data[0]++; /* ensure verifier mismatch */
+}
+EXPORT_SYMBOL_GPL(pnfs_generic_prepare_to_resend_writes);
+
+void pnfs_generic_write_commit_done(struct rpc_task *task, void *data)
+{
+ struct nfs_commit_data *wdata = data;
+
+ /* Note this may cause RPC to be resent */
+ wdata->mds_ops->rpc_call_done(task, data);
+}
+EXPORT_SYMBOL_GPL(pnfs_generic_write_commit_done);
+
+void pnfs_generic_commit_release(void *calldata)
+{
+ struct nfs_commit_data *data = calldata;
+
+ data->completion_ops->completion(data);
+ pnfs_put_lseg(data->lseg);
+ nfs_put_client(data->ds_clp);
+ nfs_commitdata_release(data);
+}
+EXPORT_SYMBOL_GPL(pnfs_generic_commit_release);
+
+/* The generic layer is about to remove the req from the commit list.
+ * If this will make the bucket empty, it will need to put the lseg reference.
+ * Note this is must be called holding the inode (/cinfo) lock
+ */
+void
+pnfs_generic_clear_request_commit(struct nfs_page *req,
+ struct nfs_commit_info *cinfo)
+{
+ struct pnfs_layout_segment *freeme = NULL;
+
+ if (!test_and_clear_bit(PG_COMMIT_TO_DS, &req->wb_flags))
+ goto out;
+ cinfo->ds->nwritten--;
+ if (list_is_singular(&req->wb_list)) {
+ struct pnfs_commit_bucket *bucket;
+
+ bucket = list_first_entry(&req->wb_list,
+ struct pnfs_commit_bucket,
+ written);
+ freeme = bucket->wlseg;
+ bucket->wlseg = NULL;
+ }
+out:
+ nfs_request_remove_commit_list(req, cinfo);
+ pnfs_put_lseg_locked(freeme);
+}
+EXPORT_SYMBOL_GPL(pnfs_generic_clear_request_commit);
+
+static int
+pnfs_generic_transfer_commit_list(struct list_head *src, struct list_head *dst,
+ struct nfs_commit_info *cinfo, int max)
+{
+ struct nfs_page *req, *tmp;
+ int ret = 0;
+
+ list_for_each_entry_safe(req, tmp, src, wb_list) {
+ if (!nfs_lock_request(req))
+ continue;
+ kref_get(&req->wb_kref);
+ if (cond_resched_lock(cinfo->lock))
+ list_safe_reset_next(req, tmp, wb_list);
+ nfs_request_remove_commit_list(req, cinfo);
+ clear_bit(PG_COMMIT_TO_DS, &req->wb_flags);
+ nfs_list_add_request(req, dst);
+ ret++;
+ if ((ret == max) && !cinfo->dreq)
+ break;
+ }
+ return ret;
+}
+
+/* Note called with cinfo->lock held. */
+static int
+pnfs_generic_scan_ds_commit_list(struct pnfs_commit_bucket *bucket,
+ struct nfs_commit_info *cinfo,
+ int max)
+{
+ struct list_head *src = &bucket->written;
+ struct list_head *dst = &bucket->committing;
+ int ret;
+
+ ret = pnfs_generic_transfer_commit_list(src, dst, cinfo, max);
+ if (ret) {
+ cinfo->ds->nwritten -= ret;
+ cinfo->ds->ncommitting += ret;
+ bucket->clseg = bucket->wlseg;
+ if (list_empty(src))
+ bucket->wlseg = NULL;
+ else
+ pnfs_get_lseg(bucket->clseg);
+ }
+ return ret;
+}
+
+/* Move reqs from written to committing lists, returning count of number moved.
+ * Note called with cinfo->lock held.
+ */
+int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo,
+ int max)
+{
+ int i, rv = 0, cnt;
+
+ for (i = 0; i < cinfo->ds->nbuckets && max != 0; i++) {
+ cnt = pnfs_generic_scan_ds_commit_list(&cinfo->ds->buckets[i],
+ cinfo, max);
+ max -= cnt;
+ rv += cnt;
+ }
+ return rv;
+}
+EXPORT_SYMBOL_GPL(pnfs_generic_scan_commit_lists);
+
+/* Pull everything off the committing lists and dump into @dst */
+void pnfs_generic_recover_commit_reqs(struct list_head *dst,
+ struct nfs_commit_info *cinfo)
+{
+ struct pnfs_commit_bucket *b;
+ struct pnfs_layout_segment *freeme;
+ int i;
+
+restart:
+ spin_lock(cinfo->lock);
+ for (i = 0, b = cinfo->ds->buckets; i < cinfo->ds->nbuckets; i++, b++) {
+ if (pnfs_generic_transfer_commit_list(&b->written, dst,
+ cinfo, 0)) {
+ freeme = b->wlseg;
+ b->wlseg = NULL;
+ spin_unlock(cinfo->lock);
+ pnfs_put_lseg(freeme);
+ goto restart;
+ }
+ }
+ cinfo->ds->nwritten = 0;
+ spin_unlock(cinfo->lock);
+}
+EXPORT_SYMBOL_GPL(pnfs_generic_recover_commit_reqs);
+
+static void pnfs_generic_retry_commit(struct nfs_commit_info *cinfo, int idx)
+{
+ struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
+ struct pnfs_commit_bucket *bucket;
+ struct pnfs_layout_segment *freeme;
+ int i;
+
+ for (i = idx; i < fl_cinfo->nbuckets; i++) {
+ bucket = &fl_cinfo->buckets[i];
+ if (list_empty(&bucket->committing))
+ continue;
+ nfs_retry_commit(&bucket->committing, bucket->clseg, cinfo);
+ spin_lock(cinfo->lock);
+ freeme = bucket->clseg;
+ bucket->clseg = NULL;
+ spin_unlock(cinfo->lock);
+ pnfs_put_lseg(freeme);
+ }
+}
+
+static unsigned int
+pnfs_generic_alloc_ds_commits(struct nfs_commit_info *cinfo,
+ struct list_head *list)
+{
+ struct pnfs_ds_commit_info *fl_cinfo;
+ struct pnfs_commit_bucket *bucket;
+ struct nfs_commit_data *data;
+ int i;
+ unsigned int nreq = 0;
+
+ fl_cinfo = cinfo->ds;
+ bucket = fl_cinfo->buckets;
+ for (i = 0; i < fl_cinfo->nbuckets; i++, bucket++) {
+ if (list_empty(&bucket->committing))
+ continue;
+ data = nfs_commitdata_alloc();
+ if (!data)
+ break;
+ data->ds_commit_index = i;
+ spin_lock(cinfo->lock);
+ data->lseg = bucket->clseg;
+ bucket->clseg = NULL;
+ spin_unlock(cinfo->lock);
+ list_add(&data->pages, list);
+ nreq++;
+ }
+
+ /* Clean up on error */
+ pnfs_generic_retry_commit(cinfo, i);
+ return nreq;
+}
+
+/* This follows nfs_commit_list pretty closely */
+int
+pnfs_generic_commit_pagelist(struct inode *inode, struct list_head *mds_pages,
+ int how, struct nfs_commit_info *cinfo,
+ int (*initiate_commit)(struct nfs_commit_data *data,
+ int how))
+{
+ struct nfs_commit_data *data, *tmp;
+ LIST_HEAD(list);
+ unsigned int nreq = 0;
+
+ if (!list_empty(mds_pages)) {
+ data = nfs_commitdata_alloc();
+ if (data != NULL) {
+ data->lseg = NULL;
+ list_add(&data->pages, &list);
+ nreq++;
+ } else {
+ nfs_retry_commit(mds_pages, NULL, cinfo);
+ pnfs_generic_retry_commit(cinfo, 0);
+ cinfo->completion_ops->error_cleanup(NFS_I(inode));
+ return -ENOMEM;
+ }
+ }
+
+ nreq += pnfs_generic_alloc_ds_commits(cinfo, &list);
+
+ if (nreq == 0) {
+ cinfo->completion_ops->error_cleanup(NFS_I(inode));
+ goto out;
+ }
+
+ atomic_add(nreq, &cinfo->mds->rpcs_out);
+
+ list_for_each_entry_safe(data, tmp, &list, pages) {
+ list_del_init(&data->pages);
+ if (!data->lseg) {
+ nfs_init_commit(data, mds_pages, NULL, cinfo);
+ nfs_initiate_commit(NFS_CLIENT(inode), data,
+ data->mds_ops, how, 0);
+ } else {
+ struct pnfs_commit_bucket *buckets;
+
+ buckets = cinfo->ds->buckets;
+ nfs_init_commit(data,
+ &buckets[data->ds_commit_index].committing,
+ data->lseg,
+ cinfo);
+ initiate_commit(data, how);
+ }
+ }
+out:
+ cinfo->ds->ncommitting = 0;
+ return PNFS_ATTEMPTED;
+}
+EXPORT_SYMBOL_GPL(pnfs_generic_commit_pagelist);
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff