Merge branch 'flexfiles'
* flexfiles: (53 commits)
pnfs: lookup new lseg at lseg boundary
nfs41: .init_read and .init_write can be called with valid pg_lseg
pnfs: Update documentation on the Layout Drivers
pnfs/flexfiles: Add the FlexFile Layout Driver
nfs: count DIO good bytes correctly with mirroring
nfs41: wait for LAYOUTRETURN before retrying LAYOUTGET
nfs: add a helper to set NFS_ODIRECT_RESCHED_WRITES to direct writes
nfs41: add NFS_LAYOUT_RETRY_LAYOUTGET to layout header flags
nfs/flexfiles: send layoutreturn before freeing lseg
nfs41: introduce NFS_LAYOUT_RETURN_BEFORE_CLOSE
nfs41: allow async version layoutreturn
nfs41: add range to layoutreturn args
pnfs: allow LD to ask to resend read through pnfs
nfs: add nfs_pgio_current_mirror helper
nfs: only reset desc->pg_mirror_idx when mirroring is supported
nfs41: add a debug warning if we destroy an unempty layout
pnfs: fail comparison when bucket verifier not set
nfs: mirroring support for direct io
nfs: add mirroring support to pgio layer
pnfs: pass ds_commit_idx through the commit path
...
Conflicts:
fs/nfs/pnfs.c
fs/nfs/pnfs.h
diff --git a/Documentation/filesystems/nfs/pnfs.txt b/Documentation/filesystems/nfs/pnfs.txt
index adc81a3..44a9f24 100644
--- a/Documentation/filesystems/nfs/pnfs.txt
+++ b/Documentation/filesystems/nfs/pnfs.txt
@@ -57,15 +57,16 @@
layout drivers
--------------
-PNFS utilizes what is called layout drivers. The STD defines 3 basic
-layout types: "files" "objects" and "blocks". For each of these types
-there is a layout-driver with a common function-vectors table which
-are called by the nfs-client pnfs-core to implement the different layout
-types.
+PNFS utilizes what is called layout drivers. The STD defines 4 basic
+layout types: "files", "objects", "blocks", and "flexfiles". For each
+of these types there is a layout-driver with a common function-vectors
+table which are called by the nfs-client pnfs-core to implement the
+different layout types.
-Files-layout-driver code is in: fs/nfs/nfs4filelayout.c && nfs4filelayoutdev.c
+Files-layout-driver code is in: fs/nfs/filelayout/.. directory
Objects-layout-deriver code is in: fs/nfs/objlayout/.. directory
Blocks-layout-deriver code is in: fs/nfs/blocklayout/.. directory
+Flexfiles-layout-driver code is in: fs/nfs/flexfilelayout/.. directory
objects-layout setup
--------------------
diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig
index 3dece03..c7abc10 100644
--- a/fs/nfs/Kconfig
+++ b/fs/nfs/Kconfig
@@ -128,6 +128,11 @@
depends on NFS_V4_1 && SCSI_OSD_ULD
default NFS_V4
+config PNFS_FLEXFILE_LAYOUT
+ tristate
+ depends on NFS_V4_1 && NFS_V3
+ default m
+
config NFS_V4_1_IMPLEMENTATION_ID_DOMAIN
string "NFSv4.1 Implementation ID Domain"
depends on NFS_V4_1
diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index 04cb830..1e987ac 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -27,9 +27,10 @@
dns_resolve.o nfs4trace.o
nfsv4-$(CONFIG_NFS_USE_LEGACY_DNS) += cache_lib.o
nfsv4-$(CONFIG_SYSCTL) += nfs4sysctl.o
-nfsv4-$(CONFIG_NFS_V4_1) += pnfs.o pnfs_dev.o
+nfsv4-$(CONFIG_NFS_V4_1) += pnfs.o pnfs_dev.o pnfs_nfs.o
nfsv4-$(CONFIG_NFS_V4_2) += nfs42proc.o
obj-$(CONFIG_PNFS_FILE_LAYOUT) += filelayout/
obj-$(CONFIG_PNFS_OBJLAYOUT) += objlayout/
obj-$(CONFIG_PNFS_BLOCK) += blocklayout/
+obj-$(CONFIG_PNFS_FLEXFILE_LAYOUT) += flexfilelayout/
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index 77fec6a..1cac3c1 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -860,12 +860,14 @@
.pg_init = bl_pg_init_read,
.pg_test = bl_pg_test_read,
.pg_doio = pnfs_generic_pg_readpages,
+ .pg_cleanup = pnfs_generic_pg_cleanup,
};
static const struct nfs_pageio_ops bl_pg_write_ops = {
.pg_init = bl_pg_init_write,
.pg_test = bl_pg_test_write,
.pg_doio = pnfs_generic_pg_writepages,
+ .pg_cleanup = pnfs_generic_pg_cleanup,
};
static struct pnfs_layoutdriver_type blocklayout_type = {
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 294692f..7077521 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -66,6 +66,10 @@
/*
* This represents a set of asynchronous requests that we're waiting on
*/
+struct nfs_direct_mirror {
+ ssize_t count;
+};
+
struct nfs_direct_req {
struct kref kref; /* release manager */
@@ -78,8 +82,13 @@
/* completion state */
atomic_t io_count; /* i/os we're waiting for */
spinlock_t lock; /* protect completion state */
+
+ struct nfs_direct_mirror mirrors[NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX];
+ int mirror_count;
+
ssize_t count, /* bytes actually processed */
bytes_left, /* bytes left to be sent */
+ io_start, /* start of IO */
error; /* any reported error */
struct completion completion; /* wait for i/o completion */
@@ -108,26 +117,56 @@
return atomic_dec_and_test(&dreq->io_count);
}
+void nfs_direct_set_resched_writes(struct nfs_direct_req *dreq)
+{
+ dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
+}
+EXPORT_SYMBOL_GPL(nfs_direct_set_resched_writes);
+
+static void
+nfs_direct_good_bytes(struct nfs_direct_req *dreq, struct nfs_pgio_header *hdr)
+{
+ int i;
+ ssize_t count;
+
+ WARN_ON_ONCE(hdr->pgio_mirror_idx >= dreq->mirror_count);
+
+ count = dreq->mirrors[hdr->pgio_mirror_idx].count;
+ if (count + dreq->io_start < hdr->io_start + hdr->good_bytes) {
+ count = hdr->io_start + hdr->good_bytes - dreq->io_start;
+ dreq->mirrors[hdr->pgio_mirror_idx].count = count;
+ }
+
+ /* update the dreq->count by finding the minimum agreed count from all
+ * mirrors */
+ count = dreq->mirrors[0].count;
+
+ for (i = 1; i < dreq->mirror_count; i++)
+ count = min(count, dreq->mirrors[i].count);
+
+ dreq->count = 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
+ * @commit_idx - commit bucket index for the DS
*
* 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)
+ int commit_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;
+ if (commit_idx >= 0 && commit_idx < dreq->ds_cinfo.nbuckets)
+ verfp = &dreq->ds_cinfo.buckets[commit_idx].direct_verf;
else
WARN_ON_ONCE(1);
}
@@ -148,8 +187,7 @@
{
struct nfs_writeverf *verfp;
- verfp = nfs_direct_select_verf(dreq, hdr->ds_clp,
- hdr->ds_idx);
+ verfp = nfs_direct_select_verf(dreq, hdr->ds_clp, hdr->ds_commit_idx);
WARN_ON_ONCE(verfp->committed >= 0);
memcpy(verfp, &hdr->verf, sizeof(struct nfs_writeverf));
WARN_ON_ONCE(verfp->committed < 0);
@@ -169,8 +207,7 @@
{
struct nfs_writeverf *verfp;
- verfp = nfs_direct_select_verf(dreq, hdr->ds_clp,
- hdr->ds_idx);
+ verfp = nfs_direct_select_verf(dreq, hdr->ds_clp, hdr->ds_commit_idx);
if (verfp->committed < 0) {
nfs_direct_set_hdr_verf(dreq, hdr);
return 0;
@@ -193,7 +230,11 @@
verfp = nfs_direct_select_verf(dreq, data->ds_clp,
data->ds_commit_index);
- WARN_ON_ONCE(verfp->committed < 0);
+
+ /* verifier not set so always fail */
+ if (verfp->committed < 0)
+ return 1;
+
return memcmp(verfp, &data->verf, sizeof(struct nfs_writeverf));
}
@@ -249,6 +290,18 @@
cinfo->completion_ops = &nfs_direct_commit_completion_ops;
}
+static inline void nfs_direct_setup_mirroring(struct nfs_direct_req *dreq,
+ struct nfs_pageio_descriptor *pgio,
+ struct nfs_page *req)
+{
+ int mirror_count = 1;
+
+ if (pgio->pg_ops->pg_get_mirror_count)
+ mirror_count = pgio->pg_ops->pg_get_mirror_count(pgio, req);
+
+ dreq->mirror_count = mirror_count;
+}
+
static inline struct nfs_direct_req *nfs_direct_req_alloc(void)
{
struct nfs_direct_req *dreq;
@@ -263,6 +316,7 @@
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);
+ dreq->mirror_count = 1;
spin_lock_init(&dreq->lock);
return dreq;
@@ -369,7 +423,8 @@
if (test_bit(NFS_IOHDR_ERROR, &hdr->flags) && (hdr->good_bytes == 0))
dreq->error = hdr->error;
else
- dreq->count += hdr->good_bytes;
+ nfs_direct_good_bytes(dreq, hdr);
+
spin_unlock(&dreq->lock);
while (!list_empty(&hdr->pages)) {
@@ -547,6 +602,7 @@
dreq->inode = inode;
dreq->bytes_left = count;
+ dreq->io_start = pos;
dreq->ctx = get_nfs_open_context(nfs_file_open_context(iocb->ki_filp));
l_ctx = nfs_get_lock_context(dreq->ctx);
if (IS_ERR(l_ctx)) {
@@ -579,6 +635,20 @@
return result;
}
+static void
+nfs_direct_write_scan_commit_list(struct inode *inode,
+ struct list_head *list,
+ struct nfs_commit_info *cinfo)
+{
+ spin_lock(cinfo->lock);
+#ifdef CONFIG_NFS_V4_1
+ if (cinfo->ds != NULL && cinfo->ds->nwritten != 0)
+ NFS_SERVER(inode)->pnfs_curr_ld->recover_commit_reqs(list, cinfo);
+#endif
+ nfs_scan_commit_list(&cinfo->mds->list, list, cinfo, 0);
+ spin_unlock(cinfo->lock);
+}
+
static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
{
struct nfs_pageio_descriptor desc;
@@ -586,20 +656,23 @@
LIST_HEAD(reqs);
struct nfs_commit_info cinfo;
LIST_HEAD(failed);
+ int i;
nfs_init_cinfo_from_dreq(&cinfo, dreq);
- pnfs_recover_commit_reqs(dreq->inode, &reqs, &cinfo);
- spin_lock(cinfo.lock);
- nfs_scan_commit_list(&cinfo.mds->list, &reqs, &cinfo, 0);
- spin_unlock(cinfo.lock);
+ nfs_direct_write_scan_commit_list(dreq->inode, &reqs, &cinfo);
dreq->count = 0;
+ for (i = 0; i < dreq->mirror_count; i++)
+ dreq->mirrors[i].count = 0;
get_dreq(dreq);
nfs_pageio_init_write(&desc, dreq->inode, FLUSH_STABLE, false,
&nfs_direct_write_completion_ops);
desc.pg_dreq = dreq;
+ req = nfs_list_entry(reqs.next);
+ nfs_direct_setup_mirroring(dreq, &desc, req);
+
list_for_each_entry_safe(req, tmp, &reqs, wb_list) {
if (!nfs_pageio_add_request(&desc, req)) {
nfs_list_remove_request(req);
@@ -646,7 +719,7 @@
nfs_list_remove_request(req);
if (dreq->flags == NFS_ODIRECT_RESCHED_WRITES) {
/* Note the rewrite will go through mds */
- nfs_mark_request_commit(req, NULL, &cinfo);
+ nfs_mark_request_commit(req, NULL, &cinfo, 0);
} else
nfs_release_request(req);
nfs_unlock_and_release_request(req);
@@ -721,7 +794,7 @@
dreq->error = hdr->error;
}
if (dreq->error == 0) {
- dreq->count += hdr->good_bytes;
+ nfs_direct_good_bytes(dreq, hdr);
if (nfs_write_need_commit(hdr)) {
if (dreq->flags == NFS_ODIRECT_RESCHED_WRITES)
request_commit = true;
@@ -745,7 +818,8 @@
nfs_list_remove_request(req);
if (request_commit) {
kref_get(&req->wb_kref);
- nfs_mark_request_commit(req, hdr->lseg, &cinfo);
+ nfs_mark_request_commit(req, hdr->lseg, &cinfo,
+ hdr->ds_commit_idx);
}
nfs_unlock_and_release_request(req);
}
@@ -826,6 +900,9 @@
result = PTR_ERR(req);
break;
}
+
+ nfs_direct_setup_mirroring(dreq, &desc, req);
+
nfs_lock_request(req);
req->wb_index = pos >> PAGE_SHIFT;
req->wb_offset = pos & ~PAGE_MASK;
@@ -934,6 +1011,7 @@
dreq->inode = inode;
dreq->bytes_left = count;
+ dreq->io_start = pos;
dreq->ctx = get_nfs_open_context(nfs_file_open_context(iocb->ki_filp));
l_ctx = nfs_get_lock_context(dreq->ctx);
if (IS_ERR(l_ctx)) {
diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c
index 7afb52f..3c97694 100644
--- a/fs/nfs/filelayout/filelayout.c
+++ b/fs/nfs/filelayout/filelayout.c
@@ -118,13 +118,6 @@
}
}
-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,
@@ -207,7 +200,7 @@
dprintk("%s DS connection error %d\n", __func__,
task->tk_status);
nfs4_mark_deviceid_unavailable(devid);
- set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags);
+ pnfs_error_mark_layout_for_return(inode, lseg);
rpc_wake_up(&tbl->slot_tbl_waitq);
/* fall through */
default:
@@ -339,16 +332,6 @@
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)
{
@@ -371,17 +354,6 @@
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)
{
@@ -393,7 +365,7 @@
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);
@@ -451,16 +423,6 @@
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;
@@ -471,14 +433,6 @@
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;
@@ -486,35 +440,25 @@
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
@@ -548,7 +492,7 @@
/* No multipath support. Use first DS */
atomic_inc(&ds->ds_clp->cl_count);
hdr->ds_clp = ds->ds_clp;
- hdr->ds_idx = idx;
+ hdr->ds_commit_idx = idx;
fh = nfs4_fl_select_ds_fh(lseg, j);
if (fh)
hdr->args.fh = fh;
@@ -557,8 +501,9 @@
hdr->mds_offset = offset;
/* Perform an asynchronous read to ds */
- nfs_initiate_pgio(ds_clnt, hdr,
- &filelayout_read_call_ops, 0, RPC_TASK_SOFTCONN);
+ nfs_initiate_pgio(ds_clnt, hdr, hdr->cred,
+ NFS_PROTO(hdr->inode), &filelayout_read_call_ops,
+ 0, RPC_TASK_SOFTCONN);
return PNFS_ATTEMPTED;
}
@@ -591,16 +536,16 @@
hdr->pgio_done_cb = filelayout_write_done_cb;
atomic_inc(&ds->ds_clp->cl_count);
hdr->ds_clp = ds->ds_clp;
- hdr->ds_idx = idx;
+ hdr->ds_commit_idx = idx;
fh = nfs4_fl_select_ds_fh(lseg, j);
if (fh)
hdr->args.fh = fh;
hdr->args.offset = filelayout_get_dserver_offset(lseg, offset);
/* Perform an asynchronous write */
- nfs_initiate_pgio(ds_clnt, hdr,
- &filelayout_write_call_ops, sync,
- RPC_TASK_SOFTCONN);
+ nfs_initiate_pgio(ds_clnt, hdr, hdr->cred,
+ NFS_PROTO(hdr->inode), &filelayout_write_call_ops,
+ sync, RPC_TASK_SOFTCONN);
return PNFS_ATTEMPTED;
}
@@ -988,12 +933,14 @@
.pg_init = filelayout_pg_init_read,
.pg_test = filelayout_pg_test,
.pg_doio = pnfs_generic_pg_readpages,
+ .pg_cleanup = pnfs_generic_pg_cleanup,
};
static const struct nfs_pageio_ops filelayout_pg_write_ops = {
.pg_init = filelayout_pg_init_write,
.pg_test = filelayout_pg_test,
.pg_doio = pnfs_generic_pg_writepages,
+ .pg_cleanup = pnfs_generic_pg_cleanup,
};
static u32 select_bucket_index(struct nfs4_filelayout_segment *fl, u32 j)
@@ -1004,37 +951,11 @@
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,
- struct nfs_commit_info *cinfo)
+ struct nfs_commit_info *cinfo,
+ u32 ds_commit_idx)
{
struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
@@ -1064,7 +985,7 @@
* 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);
}
@@ -1138,101 +1059,15 @@
fh = select_ds_fh_from_commit(lseg, data->ds_commit_index);
if (fh)
data->args.fh = fh;
- return nfs_initiate_commit(ds_clnt, data,
+ return nfs_initiate_commit(ds_clnt, data, NFS_PROTO(data->inode),
&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
@@ -1263,108 +1098,14 @@
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)
@@ -1421,9 +1162,9 @@
.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,
diff --git a/fs/nfs/filelayout/filelayout.h b/fs/nfs/filelayout/filelayout.h
index 7c9f800..2896cb8 100644
--- a/fs/nfs/filelayout/filelayout.h
+++ b/fs/nfs/filelayout/filelayout.h
@@ -33,13 +33,6 @@
#include "../pnfs.h"
/*
- * Default data server connection timeout and retrans vaules.
- * Set by module paramters dataserver_timeo and dataserver_retrans.
- */
-#define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */
-#define NFS4_DEF_DS_RETRANS 5
-
-/*
* Field testing shows we need to support up to 4096 stripe indices.
* We store each index as a u8 (u32 on the wire) to keep the memory footprint
* reasonable. This in turn means we support a maximum of 256
@@ -48,32 +41,11 @@
#define NFS4_PNFS_MAX_STRIPE_CNT 4096
#define NFS4_PNFS_MAX_MULTI_CNT 256 /* 256 fit into a u8 stripe_index */
-/* error codes for internal use */
-#define NFS4ERR_RESET_TO_MDS 12001
-
enum stripetype4 {
STRIPE_SPARSE = 1,
STRIPE_DENSE = 2
};
-/* Individual ip address */
-struct nfs4_pnfs_ds_addr {
- struct sockaddr_storage da_addr;
- size_t da_addrlen;
- struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */
- char *da_remotestr; /* human readable addr+port */
-};
-
-struct nfs4_pnfs_ds {
- struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */
- char *ds_remotestr; /* comma sep list of addrs */
- struct list_head ds_addrs;
- struct nfs_client *ds_clp;
- atomic_t ds_count;
- unsigned long ds_state;
-#define NFS4DS_CONNECTING 0 /* ds is establishing connection */
-};
-
struct nfs4_file_layout_dsaddr {
struct nfs4_deviceid_node id_node;
u32 stripe_count;
@@ -119,17 +91,6 @@
return &FILELAYOUT_LSEG(lseg)->dsaddr->id_node;
}
-static inline void
-filelayout_mark_devid_invalid(struct nfs4_deviceid_node *node)
-{
- u32 *p = (u32 *)&node->deviceid;
-
- printk(KERN_WARNING "NFS: Deviceid [%x%x%x%x] marked out of use.\n",
- p[0], p[1], p[2], p[3]);
-
- set_bit(NFS_DEVICEID_INVALID, &node->flags);
-}
-
static inline bool
filelayout_test_devid_invalid(struct nfs4_deviceid_node *node)
{
@@ -142,7 +103,6 @@
extern struct nfs_fh *
nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j);
-extern void print_ds(struct nfs4_pnfs_ds *ds);
u32 nfs4_fl_calc_j_index(struct pnfs_layout_segment *lseg, loff_t offset);
u32 nfs4_fl_calc_ds_index(struct pnfs_layout_segment *lseg, u32 j);
struct nfs4_pnfs_ds *nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg,
diff --git a/fs/nfs/filelayout/filelayoutdev.c b/fs/nfs/filelayout/filelayoutdev.c
index bfecac7..4f372e2 100644
--- a/fs/nfs/filelayout/filelayoutdev.c
+++ b/fs/nfs/filelayout/filelayoutdev.c
@@ -31,7 +31,6 @@
#include <linux/nfs_fs.h>
#include <linux/vmalloc.h>
#include <linux/module.h>
-#include <linux/sunrpc/addr.h>
#include "../internal.h"
#include "../nfs4session.h"
@@ -42,183 +41,6 @@
static unsigned int dataserver_timeo = NFS4_DEF_DS_TIMEO;
static unsigned int dataserver_retrans = NFS4_DEF_DS_RETRANS;
-/*
- * Data server cache
- *
- * Data servers can be mapped to different device ids.
- * nfs4_pnfs_ds reference counting
- * - set to 1 on allocation
- * - incremented when a device id maps a data server already in the cache.
- * - decremented when deviceid is removed from the cache.
- */
-static DEFINE_SPINLOCK(nfs4_ds_cache_lock);
-static LIST_HEAD(nfs4_data_server_cache);
-
-/* Debug routines */
-void
-print_ds(struct nfs4_pnfs_ds *ds)
-{
- if (ds == NULL) {
- printk("%s NULL device\n", __func__);
- return;
- }
- printk(" ds %s\n"
- " ref count %d\n"
- " client %p\n"
- " cl_exchange_flags %x\n",
- ds->ds_remotestr,
- atomic_read(&ds->ds_count), ds->ds_clp,
- ds->ds_clp ? ds->ds_clp->cl_exchange_flags : 0);
-}
-
-static bool
-same_sockaddr(struct sockaddr *addr1, struct sockaddr *addr2)
-{
- struct sockaddr_in *a, *b;
- struct sockaddr_in6 *a6, *b6;
-
- if (addr1->sa_family != addr2->sa_family)
- return false;
-
- switch (addr1->sa_family) {
- case AF_INET:
- a = (struct sockaddr_in *)addr1;
- b = (struct sockaddr_in *)addr2;
-
- if (a->sin_addr.s_addr == b->sin_addr.s_addr &&
- a->sin_port == b->sin_port)
- return true;
- break;
-
- case AF_INET6:
- a6 = (struct sockaddr_in6 *)addr1;
- b6 = (struct sockaddr_in6 *)addr2;
-
- /* LINKLOCAL addresses must have matching scope_id */
- if (ipv6_addr_src_scope(&a6->sin6_addr) ==
- IPV6_ADDR_SCOPE_LINKLOCAL &&
- a6->sin6_scope_id != b6->sin6_scope_id)
- return false;
-
- if (ipv6_addr_equal(&a6->sin6_addr, &b6->sin6_addr) &&
- a6->sin6_port == b6->sin6_port)
- return true;
- break;
-
- default:
- dprintk("%s: unhandled address family: %u\n",
- __func__, addr1->sa_family);
- return false;
- }
-
- return false;
-}
-
-static bool
-_same_data_server_addrs_locked(const struct list_head *dsaddrs1,
- const struct list_head *dsaddrs2)
-{
- struct nfs4_pnfs_ds_addr *da1, *da2;
-
- /* step through both lists, comparing as we go */
- for (da1 = list_first_entry(dsaddrs1, typeof(*da1), da_node),
- da2 = list_first_entry(dsaddrs2, typeof(*da2), da_node);
- da1 != NULL && da2 != NULL;
- da1 = list_entry(da1->da_node.next, typeof(*da1), da_node),
- da2 = list_entry(da2->da_node.next, typeof(*da2), da_node)) {
- if (!same_sockaddr((struct sockaddr *)&da1->da_addr,
- (struct sockaddr *)&da2->da_addr))
- return false;
- }
- if (da1 == NULL && da2 == NULL)
- return true;
-
- return false;
-}
-
-/*
- * Lookup DS by addresses. nfs4_ds_cache_lock is held
- */
-static struct nfs4_pnfs_ds *
-_data_server_lookup_locked(const struct list_head *dsaddrs)
-{
- struct nfs4_pnfs_ds *ds;
-
- list_for_each_entry(ds, &nfs4_data_server_cache, ds_node)
- if (_same_data_server_addrs_locked(&ds->ds_addrs, dsaddrs))
- return ds;
- return NULL;
-}
-
-/*
- * Create an rpc connection to the nfs4_pnfs_ds data server
- * Currently only supports IPv4 and IPv6 addresses
- */
-static int
-nfs4_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds)
-{
- struct nfs_client *clp = ERR_PTR(-EIO);
- struct nfs4_pnfs_ds_addr *da;
- int status = 0;
-
- dprintk("--> %s DS %s au_flavor %d\n", __func__, ds->ds_remotestr,
- mds_srv->nfs_client->cl_rpcclient->cl_auth->au_flavor);
-
- list_for_each_entry(da, &ds->ds_addrs, da_node) {
- dprintk("%s: DS %s: trying address %s\n",
- __func__, ds->ds_remotestr, da->da_remotestr);
-
- clp = nfs4_set_ds_client(mds_srv->nfs_client,
- (struct sockaddr *)&da->da_addr,
- da->da_addrlen, IPPROTO_TCP,
- dataserver_timeo, dataserver_retrans);
- if (!IS_ERR(clp))
- break;
- }
-
- if (IS_ERR(clp)) {
- status = PTR_ERR(clp);
- goto out;
- }
-
- status = nfs4_init_ds_session(clp, mds_srv->nfs_client->cl_lease_time);
- if (status)
- goto out_put;
-
- smp_wmb();
- ds->ds_clp = clp;
- dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr);
-out:
- return status;
-out_put:
- nfs_put_client(clp);
- goto out;
-}
-
-static void
-destroy_ds(struct nfs4_pnfs_ds *ds)
-{
- struct nfs4_pnfs_ds_addr *da;
-
- dprintk("--> %s\n", __func__);
- ifdebug(FACILITY)
- print_ds(ds);
-
- nfs_put_client(ds->ds_clp);
-
- while (!list_empty(&ds->ds_addrs)) {
- da = list_first_entry(&ds->ds_addrs,
- struct nfs4_pnfs_ds_addr,
- da_node);
- list_del_init(&da->da_node);
- kfree(da->da_remotestr);
- kfree(da);
- }
-
- kfree(ds->ds_remotestr);
- kfree(ds);
-}
-
void
nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr)
{
@@ -229,259 +51,13 @@
for (i = 0; i < dsaddr->ds_num; i++) {
ds = dsaddr->ds_list[i];
- if (ds != NULL) {
- if (atomic_dec_and_lock(&ds->ds_count,
- &nfs4_ds_cache_lock)) {
- list_del_init(&ds->ds_node);
- spin_unlock(&nfs4_ds_cache_lock);
- destroy_ds(ds);
- }
- }
+ if (ds != NULL)
+ nfs4_pnfs_ds_put(ds);
}
kfree(dsaddr->stripe_indices);
kfree(dsaddr);
}
-/*
- * Create a string with a human readable address and port to avoid
- * complicated setup around many dprinks.
- */
-static char *
-nfs4_pnfs_remotestr(struct list_head *dsaddrs, gfp_t gfp_flags)
-{
- struct nfs4_pnfs_ds_addr *da;
- char *remotestr;
- size_t len;
- char *p;
-
- len = 3; /* '{', '}' and eol */
- list_for_each_entry(da, dsaddrs, da_node) {
- len += strlen(da->da_remotestr) + 1; /* string plus comma */
- }
-
- remotestr = kzalloc(len, gfp_flags);
- if (!remotestr)
- return NULL;
-
- p = remotestr;
- *(p++) = '{';
- len--;
- list_for_each_entry(da, dsaddrs, da_node) {
- size_t ll = strlen(da->da_remotestr);
-
- if (ll > len)
- goto out_err;
-
- memcpy(p, da->da_remotestr, ll);
- p += ll;
- len -= ll;
-
- if (len < 1)
- goto out_err;
- (*p++) = ',';
- len--;
- }
- if (len < 2)
- goto out_err;
- *(p++) = '}';
- *p = '\0';
- return remotestr;
-out_err:
- kfree(remotestr);
- return NULL;
-}
-
-static struct nfs4_pnfs_ds *
-nfs4_pnfs_ds_add(struct list_head *dsaddrs, gfp_t gfp_flags)
-{
- struct nfs4_pnfs_ds *tmp_ds, *ds = NULL;
- char *remotestr;
-
- if (list_empty(dsaddrs)) {
- dprintk("%s: no addresses defined\n", __func__);
- goto out;
- }
-
- ds = kzalloc(sizeof(*ds), gfp_flags);
- if (!ds)
- goto out;
-
- /* this is only used for debugging, so it's ok if its NULL */
- remotestr = nfs4_pnfs_remotestr(dsaddrs, gfp_flags);
-
- spin_lock(&nfs4_ds_cache_lock);
- tmp_ds = _data_server_lookup_locked(dsaddrs);
- if (tmp_ds == NULL) {
- INIT_LIST_HEAD(&ds->ds_addrs);
- list_splice_init(dsaddrs, &ds->ds_addrs);
- ds->ds_remotestr = remotestr;
- atomic_set(&ds->ds_count, 1);
- INIT_LIST_HEAD(&ds->ds_node);
- ds->ds_clp = NULL;
- list_add(&ds->ds_node, &nfs4_data_server_cache);
- dprintk("%s add new data server %s\n", __func__,
- ds->ds_remotestr);
- } else {
- kfree(remotestr);
- kfree(ds);
- atomic_inc(&tmp_ds->ds_count);
- dprintk("%s data server %s found, inc'ed ds_count to %d\n",
- __func__, tmp_ds->ds_remotestr,
- atomic_read(&tmp_ds->ds_count));
- ds = tmp_ds;
- }
- spin_unlock(&nfs4_ds_cache_lock);
-out:
- return ds;
-}
-
-/*
- * Currently only supports ipv4, ipv6 and one multi-path address.
- */
-static struct nfs4_pnfs_ds_addr *
-decode_ds_addr(struct net *net, struct xdr_stream *streamp, gfp_t gfp_flags)
-{
- struct nfs4_pnfs_ds_addr *da = NULL;
- char *buf, *portstr;
- __be16 port;
- int nlen, rlen;
- int tmp[2];
- __be32 *p;
- char *netid, *match_netid;
- size_t len, match_netid_len;
- char *startsep = "";
- char *endsep = "";
-
-
- /* r_netid */
- p = xdr_inline_decode(streamp, 4);
- if (unlikely(!p))
- goto out_err;
- nlen = be32_to_cpup(p++);
-
- p = xdr_inline_decode(streamp, nlen);
- if (unlikely(!p))
- goto out_err;
-
- netid = kmalloc(nlen+1, gfp_flags);
- if (unlikely(!netid))
- goto out_err;
-
- netid[nlen] = '\0';
- memcpy(netid, p, nlen);
-
- /* r_addr: ip/ip6addr with port in dec octets - see RFC 5665 */
- p = xdr_inline_decode(streamp, 4);
- if (unlikely(!p))
- goto out_free_netid;
- rlen = be32_to_cpup(p);
-
- p = xdr_inline_decode(streamp, rlen);
- if (unlikely(!p))
- goto out_free_netid;
-
- /* port is ".ABC.DEF", 8 chars max */
- if (rlen > INET6_ADDRSTRLEN + IPV6_SCOPE_ID_LEN + 8) {
- dprintk("%s: Invalid address, length %d\n", __func__,
- rlen);
- goto out_free_netid;
- }
- buf = kmalloc(rlen + 1, gfp_flags);
- if (!buf) {
- dprintk("%s: Not enough memory\n", __func__);
- goto out_free_netid;
- }
- buf[rlen] = '\0';
- memcpy(buf, p, rlen);
-
- /* replace port '.' with '-' */
- portstr = strrchr(buf, '.');
- if (!portstr) {
- dprintk("%s: Failed finding expected dot in port\n",
- __func__);
- goto out_free_buf;
- }
- *portstr = '-';
-
- /* find '.' between address and port */
- portstr = strrchr(buf, '.');
- if (!portstr) {
- dprintk("%s: Failed finding expected dot between address and "
- "port\n", __func__);
- goto out_free_buf;
- }
- *portstr = '\0';
-
- da = kzalloc(sizeof(*da), gfp_flags);
- if (unlikely(!da))
- goto out_free_buf;
-
- INIT_LIST_HEAD(&da->da_node);
-
- if (!rpc_pton(net, buf, portstr-buf, (struct sockaddr *)&da->da_addr,
- sizeof(da->da_addr))) {
- dprintk("%s: error parsing address %s\n", __func__, buf);
- goto out_free_da;
- }
-
- portstr++;
- sscanf(portstr, "%d-%d", &tmp[0], &tmp[1]);
- port = htons((tmp[0] << 8) | (tmp[1]));
-
- switch (da->da_addr.ss_family) {
- case AF_INET:
- ((struct sockaddr_in *)&da->da_addr)->sin_port = port;
- da->da_addrlen = sizeof(struct sockaddr_in);
- match_netid = "tcp";
- match_netid_len = 3;
- break;
-
- case AF_INET6:
- ((struct sockaddr_in6 *)&da->da_addr)->sin6_port = port;
- da->da_addrlen = sizeof(struct sockaddr_in6);
- match_netid = "tcp6";
- match_netid_len = 4;
- startsep = "[";
- endsep = "]";
- break;
-
- default:
- dprintk("%s: unsupported address family: %u\n",
- __func__, da->da_addr.ss_family);
- goto out_free_da;
- }
-
- if (nlen != match_netid_len || strncmp(netid, match_netid, nlen)) {
- dprintk("%s: ERROR: r_netid \"%s\" != \"%s\"\n",
- __func__, netid, match_netid);
- goto out_free_da;
- }
-
- /* save human readable address */
- len = strlen(startsep) + strlen(buf) + strlen(endsep) + 7;
- da->da_remotestr = kzalloc(len, gfp_flags);
-
- /* NULL is ok, only used for dprintk */
- if (da->da_remotestr)
- snprintf(da->da_remotestr, len, "%s%s%s:%u", startsep,
- buf, endsep, ntohs(port));
-
- dprintk("%s: Parsed DS addr %s\n", __func__, da->da_remotestr);
- kfree(buf);
- kfree(netid);
- return da;
-
-out_free_da:
- kfree(da);
-out_free_buf:
- dprintk("%s: Error parsing DS addr: %s\n", __func__, buf);
- kfree(buf);
-out_free_netid:
- kfree(netid);
-out_err:
- return NULL;
-}
-
/* Decode opaque device data and return the result */
struct nfs4_file_layout_dsaddr *
nfs4_fl_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *pdev,
@@ -584,8 +160,8 @@
mp_count = be32_to_cpup(p); /* multipath count */
for (j = 0; j < mp_count; j++) {
- da = decode_ds_addr(server->nfs_client->cl_net,
- &stream, gfp_flags);
+ da = nfs4_decode_mp_ds_addr(server->nfs_client->cl_net,
+ &stream, gfp_flags);
if (da)
list_add_tail(&da->da_node, &dsaddrs);
}
@@ -681,22 +257,7 @@
return flseg->fh_array[i];
}
-static void nfs4_wait_ds_connect(struct nfs4_pnfs_ds *ds)
-{
- might_sleep();
- wait_on_bit_action(&ds->ds_state, NFS4DS_CONNECTING,
- nfs_wait_bit_killable, TASK_KILLABLE);
-}
-
-static void nfs4_clear_ds_conn_bit(struct nfs4_pnfs_ds *ds)
-{
- smp_mb__before_atomic();
- clear_bit(NFS4DS_CONNECTING, &ds->ds_state);
- smp_mb__after_atomic();
- wake_up_bit(&ds->ds_state, NFS4DS_CONNECTING);
-}
-
-
+/* Upon return, either ds is connected, or ds is NULL */
struct nfs4_pnfs_ds *
nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx)
{
@@ -704,29 +265,23 @@
struct nfs4_pnfs_ds *ds = dsaddr->ds_list[ds_idx];
struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg);
struct nfs4_pnfs_ds *ret = ds;
+ struct nfs_server *s = NFS_SERVER(lseg->pls_layout->plh_inode);
if (ds == NULL) {
printk(KERN_ERR "NFS: %s: No data server for offset index %d\n",
__func__, ds_idx);
- filelayout_mark_devid_invalid(devid);
+ pnfs_generic_mark_devid_invalid(devid);
goto out;
}
smp_rmb();
if (ds->ds_clp)
goto out_test_devid;
- if (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) == 0) {
- struct nfs_server *s = NFS_SERVER(lseg->pls_layout->plh_inode);
- int err;
+ nfs4_pnfs_ds_connect(s, ds, devid, dataserver_timeo,
+ dataserver_retrans, 4,
+ s->nfs_client->cl_minorversion,
+ s->nfs_client->cl_rpcclient->cl_auth->au_flavor);
- err = nfs4_ds_connect(s, ds);
- if (err)
- nfs4_mark_deviceid_unavailable(devid);
- nfs4_clear_ds_conn_bit(ds);
- } else {
- /* Either ds is connected, or ds is NULL */
- nfs4_wait_ds_connect(ds);
- }
out_test_devid:
if (filelayout_test_devid_unavailable(devid))
ret = NULL;
diff --git a/fs/nfs/flexfilelayout/Makefile b/fs/nfs/flexfilelayout/Makefile
new file mode 100644
index 0000000..1d2c9f6
--- /dev/null
+++ b/fs/nfs/flexfilelayout/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the pNFS Flexfile Layout Driver kernel module
+#
+obj-$(CONFIG_PNFS_FLEXFILE_LAYOUT) += nfs_layout_flexfiles.o
+nfs_layout_flexfiles-y := flexfilelayout.o flexfilelayoutdev.o
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
new file mode 100644
index 0000000..f29fb7d
--- /dev/null
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -0,0 +1,1574 @@
+/*
+ * Module for pnfs flexfile layout driver.
+ *
+ * Copyright (c) 2014, Primary Data, Inc. All rights reserved.
+ *
+ * Tao Peng <bergwolf@primarydata.com>
+ */
+
+#include <linux/nfs_fs.h>
+#include <linux/nfs_page.h>
+#include <linux/module.h>
+
+#include <linux/sunrpc/metrics.h>
+#include <linux/nfs_idmap.h>
+
+#include "flexfilelayout.h"
+#include "../nfs4session.h"
+#include "../internal.h"
+#include "../delegation.h"
+#include "../nfs4trace.h"
+#include "../iostat.h"
+#include "../nfs.h"
+
+#define NFSDBG_FACILITY NFSDBG_PNFS_LD
+
+#define FF_LAYOUT_POLL_RETRY_MAX (15*HZ)
+
+static struct pnfs_layout_hdr *
+ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
+{
+ struct nfs4_flexfile_layout *ffl;
+
+ ffl = kzalloc(sizeof(*ffl), gfp_flags);
+ if (ffl) {
+ INIT_LIST_HEAD(&ffl->error_list);
+ return &ffl->generic_hdr;
+ } else
+ return NULL;
+}
+
+static void
+ff_layout_free_layout_hdr(struct pnfs_layout_hdr *lo)
+{
+ struct nfs4_ff_layout_ds_err *err, *n;
+
+ list_for_each_entry_safe(err, n, &FF_LAYOUT_FROM_HDR(lo)->error_list,
+ list) {
+ list_del(&err->list);
+ kfree(err);
+ }
+ kfree(FF_LAYOUT_FROM_HDR(lo));
+}
+
+static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE);
+ if (unlikely(p == NULL))
+ return -ENOBUFS;
+ memcpy(stateid, p, NFS4_STATEID_SIZE);
+ dprintk("%s: stateid id= [%x%x%x%x]\n", __func__,
+ p[0], p[1], p[2], p[3]);
+ return 0;
+}
+
+static int decode_deviceid(struct xdr_stream *xdr, struct nfs4_deviceid *devid)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE);
+ if (unlikely(!p))
+ return -ENOBUFS;
+ memcpy(devid, p, NFS4_DEVICEID4_SIZE);
+ nfs4_print_deviceid(devid);
+ return 0;
+}
+
+static int decode_nfs_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ return -ENOBUFS;
+ fh->size = be32_to_cpup(p++);
+ if (fh->size > sizeof(struct nfs_fh)) {
+ printk(KERN_ERR "NFS flexfiles: Too big fh received %d\n",
+ fh->size);
+ return -EOVERFLOW;
+ }
+ /* fh.data */
+ p = xdr_inline_decode(xdr, fh->size);
+ if (unlikely(!p))
+ return -ENOBUFS;
+ memcpy(&fh->data, p, fh->size);
+ dprintk("%s: fh len %d\n", __func__, fh->size);
+
+ return 0;
+}
+
+/*
+ * Currently only stringified uids and gids are accepted.
+ * I.e., kerberos is not supported to the DSes, so no pricipals.
+ *
+ * That means that one common function will suffice, but when
+ * principals are added, this should be split to accomodate
+ * calls to both nfs_map_name_to_uid() and nfs_map_group_to_gid().
+ */
+static int
+decode_name(struct xdr_stream *xdr, u32 *id)
+{
+ __be32 *p;
+ int len;
+
+ /* opaque_length(4)*/
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ return -ENOBUFS;
+ len = be32_to_cpup(p++);
+ if (len < 0)
+ return -EINVAL;
+
+ dprintk("%s: len %u\n", __func__, len);
+
+ /* opaque body */
+ p = xdr_inline_decode(xdr, len);
+ if (unlikely(!p))
+ return -ENOBUFS;
+
+ if (!nfs_map_string_to_numeric((char *)p, len, id))
+ return -EINVAL;
+
+ return 0;
+}
+
+static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls)
+{
+ int i;
+
+ if (fls->mirror_array) {
+ for (i = 0; i < fls->mirror_array_cnt; i++) {
+ /* normally mirror_ds is freed in
+ * .free_deviceid_node but we still do it here
+ * for .alloc_lseg error path */
+ if (fls->mirror_array[i]) {
+ kfree(fls->mirror_array[i]->fh_versions);
+ nfs4_ff_layout_put_deviceid(fls->mirror_array[i]->mirror_ds);
+ kfree(fls->mirror_array[i]);
+ }
+ }
+ kfree(fls->mirror_array);
+ fls->mirror_array = NULL;
+ }
+}
+
+static int ff_layout_check_layout(struct nfs4_layoutget_res *lgr)
+{
+ int ret = 0;
+
+ dprintk("--> %s\n", __func__);
+
+ /* FIXME: remove this check when layout segment support is added */
+ if (lgr->range.offset != 0 ||
+ lgr->range.length != NFS4_MAX_UINT64) {
+ dprintk("%s Only whole file layouts supported. Use MDS i/o\n",
+ __func__);
+ ret = -EINVAL;
+ }
+
+ dprintk("--> %s returns %d\n", __func__, ret);
+ return ret;
+}
+
+static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls)
+{
+ if (fls) {
+ ff_layout_free_mirror_array(fls);
+ kfree(fls);
+ }
+}
+
+static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls)
+{
+ struct nfs4_ff_layout_mirror *tmp;
+ int i, j;
+
+ for (i = 0; i < fls->mirror_array_cnt - 1; i++) {
+ for (j = i + 1; j < fls->mirror_array_cnt; j++)
+ if (fls->mirror_array[i]->efficiency <
+ fls->mirror_array[j]->efficiency) {
+ tmp = fls->mirror_array[i];
+ fls->mirror_array[i] = fls->mirror_array[j];
+ fls->mirror_array[j] = tmp;
+ }
+ }
+}
+
+static struct pnfs_layout_segment *
+ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh,
+ struct nfs4_layoutget_res *lgr,
+ gfp_t gfp_flags)
+{
+ struct pnfs_layout_segment *ret;
+ struct nfs4_ff_layout_segment *fls = NULL;
+ struct xdr_stream stream;
+ struct xdr_buf buf;
+ struct page *scratch;
+ u64 stripe_unit;
+ u32 mirror_array_cnt;
+ __be32 *p;
+ int i, rc;
+
+ dprintk("--> %s\n", __func__);
+ scratch = alloc_page(gfp_flags);
+ if (!scratch)
+ return ERR_PTR(-ENOMEM);
+
+ xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages,
+ lgr->layoutp->len);
+ xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
+
+ /* stripe unit and mirror_array_cnt */
+ rc = -EIO;
+ p = xdr_inline_decode(&stream, 8 + 4);
+ if (!p)
+ goto out_err_free;
+
+ p = xdr_decode_hyper(p, &stripe_unit);
+ mirror_array_cnt = be32_to_cpup(p++);
+ dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__,
+ stripe_unit, mirror_array_cnt);
+
+ if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT ||
+ mirror_array_cnt == 0)
+ goto out_err_free;
+
+ rc = -ENOMEM;
+ fls = kzalloc(sizeof(*fls), gfp_flags);
+ if (!fls)
+ goto out_err_free;
+
+ fls->mirror_array_cnt = mirror_array_cnt;
+ fls->stripe_unit = stripe_unit;
+ fls->mirror_array = kcalloc(fls->mirror_array_cnt,
+ sizeof(fls->mirror_array[0]), gfp_flags);
+ if (fls->mirror_array == NULL)
+ goto out_err_free;
+
+ for (i = 0; i < fls->mirror_array_cnt; i++) {
+ struct nfs4_deviceid devid;
+ struct nfs4_deviceid_node *idnode;
+ u32 ds_count;
+ u32 fh_count;
+ int j;
+
+ rc = -EIO;
+ p = xdr_inline_decode(&stream, 4);
+ if (!p)
+ goto out_err_free;
+ ds_count = be32_to_cpup(p);
+
+ /* FIXME: allow for striping? */
+ if (ds_count != 1)
+ goto out_err_free;
+
+ fls->mirror_array[i] =
+ kzalloc(sizeof(struct nfs4_ff_layout_mirror),
+ gfp_flags);
+ if (fls->mirror_array[i] == NULL) {
+ rc = -ENOMEM;
+ goto out_err_free;
+ }
+
+ spin_lock_init(&fls->mirror_array[i]->lock);
+ fls->mirror_array[i]->ds_count = ds_count;
+
+ /* deviceid */
+ rc = decode_deviceid(&stream, &devid);
+ if (rc)
+ goto out_err_free;
+
+ idnode = nfs4_find_get_deviceid(NFS_SERVER(lh->plh_inode),
+ &devid, lh->plh_lc_cred,
+ gfp_flags);
+ /*
+ * upon success, mirror_ds is allocated by previous
+ * getdeviceinfo, or newly by .alloc_deviceid_node
+ * nfs4_find_get_deviceid failure is indeed getdeviceinfo falure
+ */
+ if (idnode)
+ fls->mirror_array[i]->mirror_ds =
+ FF_LAYOUT_MIRROR_DS(idnode);
+ else
+ goto out_err_free;
+
+ /* efficiency */
+ rc = -EIO;
+ p = xdr_inline_decode(&stream, 4);
+ if (!p)
+ goto out_err_free;
+ fls->mirror_array[i]->efficiency = be32_to_cpup(p);
+
+ /* stateid */
+ rc = decode_stateid(&stream, &fls->mirror_array[i]->stateid);
+ if (rc)
+ goto out_err_free;
+
+ /* fh */
+ p = xdr_inline_decode(&stream, 4);
+ if (!p)
+ goto out_err_free;
+ fh_count = be32_to_cpup(p);
+
+ fls->mirror_array[i]->fh_versions =
+ kzalloc(fh_count * sizeof(struct nfs_fh),
+ gfp_flags);
+ if (fls->mirror_array[i]->fh_versions == NULL) {
+ rc = -ENOMEM;
+ goto out_err_free;
+ }
+
+ for (j = 0; j < fh_count; j++) {
+ rc = decode_nfs_fh(&stream,
+ &fls->mirror_array[i]->fh_versions[j]);
+ if (rc)
+ goto out_err_free;
+ }
+
+ fls->mirror_array[i]->fh_versions_cnt = fh_count;
+
+ /* user */
+ rc = decode_name(&stream, &fls->mirror_array[i]->uid);
+ if (rc)
+ goto out_err_free;
+
+ /* group */
+ rc = decode_name(&stream, &fls->mirror_array[i]->gid);
+ if (rc)
+ goto out_err_free;
+
+ dprintk("%s: uid %d gid %d\n", __func__,
+ fls->mirror_array[i]->uid,
+ fls->mirror_array[i]->gid);
+ }
+
+ ff_layout_sort_mirrors(fls);
+ rc = ff_layout_check_layout(lgr);
+ if (rc)
+ goto out_err_free;
+
+ ret = &fls->generic_hdr;
+ dprintk("<-- %s (success)\n", __func__);
+out_free_page:
+ __free_page(scratch);
+ return ret;
+out_err_free:
+ _ff_layout_free_lseg(fls);
+ ret = ERR_PTR(rc);
+ dprintk("<-- %s (%d)\n", __func__, rc);
+ goto out_free_page;
+}
+
+static bool ff_layout_has_rw_segments(struct pnfs_layout_hdr *layout)
+{
+ struct pnfs_layout_segment *lseg;
+
+ list_for_each_entry(lseg, &layout->plh_segs, pls_list)
+ if (lseg->pls_range.iomode == IOMODE_RW)
+ return true;
+
+ return false;
+}
+
+static void
+ff_layout_free_lseg(struct pnfs_layout_segment *lseg)
+{
+ struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
+ int i;
+
+ dprintk("--> %s\n", __func__);
+
+ for (i = 0; i < fls->mirror_array_cnt; i++) {
+ if (fls->mirror_array[i]) {
+ nfs4_ff_layout_put_deviceid(fls->mirror_array[i]->mirror_ds);
+ fls->mirror_array[i]->mirror_ds = NULL;
+ if (fls->mirror_array[i]->cred) {
+ put_rpccred(fls->mirror_array[i]->cred);
+ fls->mirror_array[i]->cred = NULL;
+ }
+ }
+ }
+
+ if (lseg->pls_range.iomode == IOMODE_RW) {
+ struct nfs4_flexfile_layout *ffl;
+ struct inode *inode;
+
+ ffl = FF_LAYOUT_FROM_HDR(lseg->pls_layout);
+ inode = ffl->generic_hdr.plh_inode;
+ spin_lock(&inode->i_lock);
+ if (!ff_layout_has_rw_segments(lseg->pls_layout)) {
+ ffl->commit_info.nbuckets = 0;
+ kfree(ffl->commit_info.buckets);
+ ffl->commit_info.buckets = NULL;
+ }
+ spin_unlock(&inode->i_lock);
+ }
+ _ff_layout_free_lseg(fls);
+}
+
+/* Return 1 until we have multiple lsegs support */
+static int
+ff_layout_get_lseg_count(struct nfs4_ff_layout_segment *fls)
+{
+ return 1;
+}
+
+static int
+ff_layout_alloc_commit_info(struct pnfs_layout_segment *lseg,
+ struct nfs_commit_info *cinfo,
+ gfp_t gfp_flags)
+{
+ struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
+ struct pnfs_commit_bucket *buckets;
+ int size;
+
+ if (cinfo->ds->nbuckets != 0) {
+ /* This assumes there is only one RW lseg per file.
+ * To support multiple lseg per file, we need to
+ * change struct pnfs_commit_bucket to allow dynamic
+ * increasing nbuckets.
+ */
+ return 0;
+ }
+
+ size = ff_layout_get_lseg_count(fls) * FF_LAYOUT_MIRROR_COUNT(lseg);
+
+ buckets = kcalloc(size, sizeof(struct pnfs_commit_bucket),
+ gfp_flags);
+ if (!buckets)
+ return -ENOMEM;
+ else {
+ int i;
+
+ spin_lock(cinfo->lock);
+ if (cinfo->ds->nbuckets != 0)
+ kfree(buckets);
+ else {
+ cinfo->ds->buckets = buckets;
+ cinfo->ds->nbuckets = size;
+ for (i = 0; i < size; i++) {
+ INIT_LIST_HEAD(&buckets[i].written);
+ INIT_LIST_HEAD(&buckets[i].committing);
+ /* mark direct verifier as unset */
+ buckets[i].direct_verf.committed =
+ NFS_INVALID_STABLE_HOW;
+ }
+ }
+ spin_unlock(cinfo->lock);
+ return 0;
+ }
+}
+
+static struct nfs4_pnfs_ds *
+ff_layout_choose_best_ds_for_read(struct nfs_pageio_descriptor *pgio,
+ int *best_idx)
+{
+ struct nfs4_ff_layout_segment *fls;
+ struct nfs4_pnfs_ds *ds;
+ int idx;
+
+ fls = FF_LAYOUT_LSEG(pgio->pg_lseg);
+ /* mirrors are sorted by efficiency */
+ for (idx = 0; idx < fls->mirror_array_cnt; idx++) {
+ ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, idx, false);
+ if (ds) {
+ *best_idx = idx;
+ return ds;
+ }
+ }
+
+ return NULL;
+}
+
+static void
+ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio,
+ struct nfs_page *req)
+{
+ struct nfs_pgio_mirror *pgm;
+ struct nfs4_ff_layout_mirror *mirror;
+ struct nfs4_pnfs_ds *ds;
+ int ds_idx;
+
+ /* Use full layout for now */
+ if (!pgio->pg_lseg)
+ pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
+ req->wb_context,
+ 0,
+ NFS4_MAX_UINT64,
+ IOMODE_READ,
+ GFP_KERNEL);
+ /* If no lseg, fall back to read through mds */
+ if (pgio->pg_lseg == NULL)
+ goto out_mds;
+
+ ds = ff_layout_choose_best_ds_for_read(pgio, &ds_idx);
+ if (!ds)
+ goto out_mds;
+ mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx);
+
+ pgio->pg_mirror_idx = ds_idx;
+
+ /* read always uses only one mirror - idx 0 for pgio layer */
+ pgm = &pgio->pg_mirrors[0];
+ pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize;
+
+ return;
+out_mds:
+ pnfs_put_lseg(pgio->pg_lseg);
+ pgio->pg_lseg = NULL;
+ nfs_pageio_reset_read_mds(pgio);
+}
+
+static void
+ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio,
+ struct nfs_page *req)
+{
+ struct nfs4_ff_layout_mirror *mirror;
+ struct nfs_pgio_mirror *pgm;
+ struct nfs_commit_info cinfo;
+ struct nfs4_pnfs_ds *ds;
+ int i;
+ int status;
+
+ if (!pgio->pg_lseg)
+ pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
+ req->wb_context,
+ 0,
+ NFS4_MAX_UINT64,
+ IOMODE_RW,
+ GFP_NOFS);
+ /* If no lseg, fall back to write through mds */
+ if (pgio->pg_lseg == NULL)
+ goto out_mds;
+
+ nfs_init_cinfo(&cinfo, pgio->pg_inode, pgio->pg_dreq);
+ status = ff_layout_alloc_commit_info(pgio->pg_lseg, &cinfo, GFP_NOFS);
+ if (status < 0)
+ goto out_mds;
+
+ /* Use a direct mapping of ds_idx to pgio mirror_idx */
+ if (WARN_ON_ONCE(pgio->pg_mirror_count !=
+ FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg)))
+ goto out_mds;
+
+ for (i = 0; i < pgio->pg_mirror_count; i++) {
+ ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, i, true);
+ if (!ds)
+ goto out_mds;
+ pgm = &pgio->pg_mirrors[i];
+ mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i);
+ pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize;
+ }
+
+ return;
+
+out_mds:
+ pnfs_put_lseg(pgio->pg_lseg);
+ pgio->pg_lseg = NULL;
+ nfs_pageio_reset_write_mds(pgio);
+}
+
+static unsigned int
+ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio,
+ struct nfs_page *req)
+{
+ if (!pgio->pg_lseg)
+ pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
+ req->wb_context,
+ 0,
+ NFS4_MAX_UINT64,
+ IOMODE_RW,
+ GFP_NOFS);
+ if (pgio->pg_lseg)
+ return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg);
+
+ /* no lseg means that pnfs is not in use, so no mirroring here */
+ pnfs_put_lseg(pgio->pg_lseg);
+ pgio->pg_lseg = NULL;
+ nfs_pageio_reset_write_mds(pgio);
+ return 1;
+}
+
+static const struct nfs_pageio_ops ff_layout_pg_read_ops = {
+ .pg_init = ff_layout_pg_init_read,
+ .pg_test = pnfs_generic_pg_test,
+ .pg_doio = pnfs_generic_pg_readpages,
+ .pg_cleanup = pnfs_generic_pg_cleanup,
+};
+
+static const struct nfs_pageio_ops ff_layout_pg_write_ops = {
+ .pg_init = ff_layout_pg_init_write,
+ .pg_test = pnfs_generic_pg_test,
+ .pg_doio = pnfs_generic_pg_writepages,
+ .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write,
+ .pg_cleanup = pnfs_generic_pg_cleanup,
+};
+
+static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs)
+{
+ struct rpc_task *task = &hdr->task;
+
+ pnfs_layoutcommit_inode(hdr->inode, false);
+
+ if (retry_pnfs) {
+ dprintk("%s Reset task %5u for i/o through pNFS "
+ "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
+ hdr->task.tk_pid,
+ hdr->inode->i_sb->s_id,
+ (unsigned long long)NFS_FILEID(hdr->inode),
+ hdr->args.count,
+ (unsigned long long)hdr->args.offset);
+
+ if (!hdr->dreq) {
+ struct nfs_open_context *ctx;
+
+ ctx = nfs_list_entry(hdr->pages.next)->wb_context;
+ set_bit(NFS_CONTEXT_RESEND_WRITES, &ctx->flags);
+ hdr->completion_ops->error_cleanup(&hdr->pages);
+ } else {
+ nfs_direct_set_resched_writes(hdr->dreq);
+ /* fake unstable write to let common nfs resend pages */
+ hdr->verf.committed = NFS_UNSTABLE;
+ hdr->good_bytes = 0;
+ }
+ return;
+ }
+
+ if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
+ dprintk("%s Reset task %5u for i/o through MDS "
+ "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
+ hdr->task.tk_pid,
+ hdr->inode->i_sb->s_id,
+ (unsigned long long)NFS_FILEID(hdr->inode),
+ hdr->args.count,
+ (unsigned long long)hdr->args.offset);
+
+ task->tk_status = pnfs_write_done_resend_to_mds(hdr);
+ }
+}
+
+static void ff_layout_reset_read(struct nfs_pgio_header *hdr)
+{
+ struct rpc_task *task = &hdr->task;
+
+ pnfs_layoutcommit_inode(hdr->inode, false);
+
+ if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
+ dprintk("%s Reset task %5u for i/o through MDS "
+ "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
+ hdr->task.tk_pid,
+ hdr->inode->i_sb->s_id,
+ (unsigned long long)NFS_FILEID(hdr->inode),
+ hdr->args.count,
+ (unsigned long long)hdr->args.offset);
+
+ task->tk_status = pnfs_read_done_resend_to_mds(hdr);
+ }
+}
+
+static int ff_layout_async_handle_error_v4(struct rpc_task *task,
+ struct nfs4_state *state,
+ struct nfs_client *clp,
+ struct pnfs_layout_segment *lseg,
+ int idx)
+{
+ struct pnfs_layout_hdr *lo = lseg->pls_layout;
+ struct inode *inode = lo->plh_inode;
+ struct nfs_server *mds_server = NFS_SERVER(inode);
+
+ struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
+ struct nfs_client *mds_client = mds_server->nfs_client;
+ struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table;
+
+ if (task->tk_status >= 0)
+ return 0;
+
+ switch (task->tk_status) {
+ /* MDS state errors */
+ case -NFS4ERR_DELEG_REVOKED:
+ case -NFS4ERR_ADMIN_REVOKED:
+ case -NFS4ERR_BAD_STATEID:
+ if (state == NULL)
+ break;
+ nfs_remove_bad_delegation(state->inode);
+ case -NFS4ERR_OPENMODE:
+ if (state == NULL)
+ break;
+ if (nfs4_schedule_stateid_recovery(mds_server, state) < 0)
+ goto out_bad_stateid;
+ goto wait_on_recovery;
+ case -NFS4ERR_EXPIRED:
+ if (state != NULL) {
+ if (nfs4_schedule_stateid_recovery(mds_server, state) < 0)
+ goto out_bad_stateid;
+ }
+ nfs4_schedule_lease_recovery(mds_client);
+ goto wait_on_recovery;
+ /* DS session errors */
+ case -NFS4ERR_BADSESSION:
+ case -NFS4ERR_BADSLOT:
+ case -NFS4ERR_BAD_HIGH_SLOT:
+ case -NFS4ERR_DEADSESSION:
+ case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
+ case -NFS4ERR_SEQ_FALSE_RETRY:
+ case -NFS4ERR_SEQ_MISORDERED:
+ dprintk("%s ERROR %d, Reset session. Exchangeid "
+ "flags 0x%x\n", __func__, task->tk_status,
+ clp->cl_exchange_flags);
+ nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
+ break;
+ case -NFS4ERR_DELAY:
+ case -NFS4ERR_GRACE:
+ rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX);
+ break;
+ case -NFS4ERR_RETRY_UNCACHED_REP:
+ break;
+ /* Invalidate Layout errors */
+ case -NFS4ERR_PNFS_NO_LAYOUT:
+ case -ESTALE: /* mapped NFS4ERR_STALE */
+ case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */
+ case -EISDIR: /* mapped NFS4ERR_ISDIR */
+ case -NFS4ERR_FHEXPIRED:
+ case -NFS4ERR_WRONG_TYPE:
+ dprintk("%s Invalid layout error %d\n", __func__,
+ task->tk_status);
+ /*
+ * Destroy layout so new i/o will get a new layout.
+ * Layout will not be destroyed until all current lseg
+ * references are put. Mark layout as invalid to resend failed
+ * i/o and all i/o waiting on the slot table to the MDS until
+ * layout is destroyed and a new valid layout is obtained.
+ */
+ pnfs_destroy_layout(NFS_I(inode));
+ rpc_wake_up(&tbl->slot_tbl_waitq);
+ goto reset;
+ /* RPC connection errors */
+ case -ECONNREFUSED:
+ case -EHOSTDOWN:
+ case -EHOSTUNREACH:
+ case -ENETUNREACH:
+ case -EIO:
+ case -ETIMEDOUT:
+ case -EPIPE:
+ dprintk("%s DS connection error %d\n", __func__,
+ task->tk_status);
+ nfs4_mark_deviceid_unavailable(devid);
+ rpc_wake_up(&tbl->slot_tbl_waitq);
+ /* fall through */
+ default:
+ if (ff_layout_has_available_ds(lseg))
+ return -NFS4ERR_RESET_TO_PNFS;
+reset:
+ dprintk("%s Retry through MDS. Error %d\n", __func__,
+ task->tk_status);
+ return -NFS4ERR_RESET_TO_MDS;
+ }
+out:
+ task->tk_status = 0;
+ return -EAGAIN;
+out_bad_stateid:
+ task->tk_status = -EIO;
+ return 0;
+wait_on_recovery:
+ rpc_sleep_on(&mds_client->cl_rpcwaitq, task, NULL);
+ if (test_bit(NFS4CLNT_MANAGER_RUNNING, &mds_client->cl_state) == 0)
+ rpc_wake_up_queued_task(&mds_client->cl_rpcwaitq, task);
+ goto out;
+}
+
+/* Retry all errors through either pNFS or MDS except for -EJUKEBOX */
+static int ff_layout_async_handle_error_v3(struct rpc_task *task,
+ struct pnfs_layout_segment *lseg,
+ int idx)
+{
+ struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
+
+ if (task->tk_status >= 0)
+ return 0;
+
+ if (task->tk_status != -EJUKEBOX) {
+ dprintk("%s DS connection error %d\n", __func__,
+ task->tk_status);
+ nfs4_mark_deviceid_unavailable(devid);
+ if (ff_layout_has_available_ds(lseg))
+ return -NFS4ERR_RESET_TO_PNFS;
+ else
+ return -NFS4ERR_RESET_TO_MDS;
+ }
+
+ if (task->tk_status == -EJUKEBOX)
+ nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY);
+ task->tk_status = 0;
+ rpc_restart_call(task);
+ rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
+ return -EAGAIN;
+}
+
+static int ff_layout_async_handle_error(struct rpc_task *task,
+ struct nfs4_state *state,
+ struct nfs_client *clp,
+ struct pnfs_layout_segment *lseg,
+ int idx)
+{
+ int vers = clp->cl_nfs_mod->rpc_vers->number;
+
+ switch (vers) {
+ case 3:
+ return ff_layout_async_handle_error_v3(task, lseg, idx);
+ case 4:
+ return ff_layout_async_handle_error_v4(task, state, clp,
+ lseg, idx);
+ default:
+ /* should never happen */
+ WARN_ON_ONCE(1);
+ return 0;
+ }
+}
+
+static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg,
+ int idx, u64 offset, u64 length,
+ u32 status, int opnum)
+{
+ struct nfs4_ff_layout_mirror *mirror;
+ int err;
+
+ mirror = FF_LAYOUT_COMP(lseg, idx);
+ err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout),
+ mirror, offset, length, status, opnum,
+ GFP_NOIO);
+ dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status);
+}
+
+/* NFS_PROTO call done callback routines */
+
+static int ff_layout_read_done_cb(struct rpc_task *task,
+ struct nfs_pgio_header *hdr)
+{
+ struct inode *inode;
+ int err;
+
+ trace_nfs4_pnfs_read(hdr, task->tk_status);
+ if (task->tk_status == -ETIMEDOUT && !hdr->res.op_status)
+ hdr->res.op_status = NFS4ERR_NXIO;
+ if (task->tk_status < 0 && hdr->res.op_status)
+ ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
+ hdr->args.offset, hdr->args.count,
+ hdr->res.op_status, OP_READ);
+ err = ff_layout_async_handle_error(task, hdr->args.context->state,
+ hdr->ds_clp, hdr->lseg,
+ hdr->pgio_mirror_idx);
+
+ switch (err) {
+ case -NFS4ERR_RESET_TO_PNFS:
+ set_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
+ &hdr->lseg->pls_layout->plh_flags);
+ pnfs_read_resend_pnfs(hdr);
+ return task->tk_status;
+ case -NFS4ERR_RESET_TO_MDS:
+ inode = hdr->lseg->pls_layout->plh_inode;
+ pnfs_error_mark_layout_for_return(inode, hdr->lseg);
+ ff_layout_reset_read(hdr);
+ return task->tk_status;
+ case -EAGAIN:
+ rpc_restart_call_prepare(task);
+ return -EAGAIN;
+ }
+
+ return 0;
+}
+
+/*
+ * We reference the rpc_cred of the first WRITE that triggers the need for
+ * a LAYOUTCOMMIT, and use it to send the layoutcommit compound.
+ * rfc5661 is not clear about which credential should be used.
+ *
+ * Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so
+ * to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751
+ * we always send layoutcommit after DS writes.
+ */
+static void
+ff_layout_set_layoutcommit(struct nfs_pgio_header *hdr)
+{
+ pnfs_set_layoutcommit(hdr);
+ dprintk("%s inode %lu pls_end_pos %lu\n", __func__, hdr->inode->i_ino,
+ (unsigned long) NFS_I(hdr->inode)->layout->plh_lwb);
+}
+
+static bool
+ff_layout_reset_to_mds(struct pnfs_layout_segment *lseg, int idx)
+{
+ /* No mirroring for now */
+ struct nfs4_deviceid_node *node = FF_LAYOUT_DEVID_NODE(lseg, idx);
+
+ return ff_layout_test_devid_unavailable(node);
+}
+
+static int ff_layout_read_prepare_common(struct rpc_task *task,
+ struct nfs_pgio_header *hdr)
+{
+ if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
+ rpc_exit(task, -EIO);
+ return -EIO;
+ }
+ if (ff_layout_reset_to_mds(hdr->lseg, hdr->pgio_mirror_idx)) {
+ dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid);
+ if (ff_layout_has_available_ds(hdr->lseg))
+ pnfs_read_resend_pnfs(hdr);
+ else
+ ff_layout_reset_read(hdr);
+ rpc_exit(task, 0);
+ return -EAGAIN;
+ }
+ hdr->pgio_done_cb = ff_layout_read_done_cb;
+
+ return 0;
+}
+
+/*
+ * Call ops for the async read/write cases
+ * In the case of dense layouts, the offset needs to be reset to its
+ * original value.
+ */
+static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data)
+{
+ struct nfs_pgio_header *hdr = data;
+
+ if (ff_layout_read_prepare_common(task, hdr))
+ return;
+
+ rpc_call_start(task);
+}
+
+static int ff_layout_setup_sequence(struct nfs_client *ds_clp,
+ struct nfs4_sequence_args *args,
+ struct nfs4_sequence_res *res,
+ struct rpc_task *task)
+{
+ if (ds_clp->cl_session)
+ return nfs41_setup_sequence(ds_clp->cl_session,
+ args,
+ res,
+ task);
+ return nfs40_setup_sequence(ds_clp->cl_slot_tbl,
+ args,
+ res,
+ task);
+}
+
+static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data)
+{
+ struct nfs_pgio_header *hdr = data;
+
+ if (ff_layout_read_prepare_common(task, hdr))
+ return;
+
+ if (ff_layout_setup_sequence(hdr->ds_clp,
+ &hdr->args.seq_args,
+ &hdr->res.seq_res,
+ task))
+ return;
+
+ if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
+ hdr->args.lock_context, FMODE_READ) == -EIO)
+ rpc_exit(task, -EIO); /* lost lock, terminate I/O */
+}
+
+static void ff_layout_read_call_done(struct rpc_task *task, void *data)
+{
+ struct nfs_pgio_header *hdr = data;
+
+ dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status);
+
+ if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
+ task->tk_status == 0) {
+ nfs4_sequence_done(task, &hdr->res.seq_res);
+ return;
+ }
+
+ /* Note this may cause RPC to be resent */
+ hdr->mds_ops->rpc_call_done(task, hdr);
+}
+
+static void ff_layout_read_count_stats(struct rpc_task *task, void *data)
+{
+ struct nfs_pgio_header *hdr = data;
+
+ rpc_count_iostats_metrics(task,
+ &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]);
+}
+
+static int ff_layout_write_done_cb(struct rpc_task *task,
+ struct nfs_pgio_header *hdr)
+{
+ struct inode *inode;
+ int err;
+
+ trace_nfs4_pnfs_write(hdr, task->tk_status);
+ if (task->tk_status == -ETIMEDOUT && !hdr->res.op_status)
+ hdr->res.op_status = NFS4ERR_NXIO;
+ if (task->tk_status < 0 && hdr->res.op_status)
+ ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
+ hdr->args.offset, hdr->args.count,
+ hdr->res.op_status, OP_WRITE);
+ err = ff_layout_async_handle_error(task, hdr->args.context->state,
+ hdr->ds_clp, hdr->lseg,
+ hdr->pgio_mirror_idx);
+
+ switch (err) {
+ case -NFS4ERR_RESET_TO_PNFS:
+ case -NFS4ERR_RESET_TO_MDS:
+ inode = hdr->lseg->pls_layout->plh_inode;
+ pnfs_error_mark_layout_for_return(inode, hdr->lseg);
+ if (err == -NFS4ERR_RESET_TO_PNFS) {
+ pnfs_set_retry_layoutget(hdr->lseg->pls_layout);
+ ff_layout_reset_write(hdr, true);
+ } else {
+ pnfs_clear_retry_layoutget(hdr->lseg->pls_layout);
+ ff_layout_reset_write(hdr, false);
+ }
+ return task->tk_status;
+ case -EAGAIN:
+ rpc_restart_call_prepare(task);
+ return -EAGAIN;
+ }
+
+ if (hdr->res.verf->committed == NFS_FILE_SYNC ||
+ hdr->res.verf->committed == NFS_DATA_SYNC)
+ ff_layout_set_layoutcommit(hdr);
+
+ return 0;
+}
+
+static int ff_layout_commit_done_cb(struct rpc_task *task,
+ struct nfs_commit_data *data)
+{
+ struct inode *inode;
+ int err;
+
+ trace_nfs4_pnfs_commit_ds(data, task->tk_status);
+ if (task->tk_status == -ETIMEDOUT && !data->res.op_status)
+ data->res.op_status = NFS4ERR_NXIO;
+ if (task->tk_status < 0 && data->res.op_status)
+ ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index,
+ data->args.offset, data->args.count,
+ data->res.op_status, OP_COMMIT);
+ err = ff_layout_async_handle_error(task, NULL, data->ds_clp,
+ data->lseg, data->ds_commit_index);
+
+ switch (err) {
+ case -NFS4ERR_RESET_TO_PNFS:
+ case -NFS4ERR_RESET_TO_MDS:
+ inode = data->lseg->pls_layout->plh_inode;
+ pnfs_error_mark_layout_for_return(inode, data->lseg);
+ if (err == -NFS4ERR_RESET_TO_PNFS)
+ pnfs_set_retry_layoutget(data->lseg->pls_layout);
+ else
+ pnfs_clear_retry_layoutget(data->lseg->pls_layout);
+ pnfs_generic_prepare_to_resend_writes(data);
+ return -EAGAIN;
+ case -EAGAIN:
+ rpc_restart_call_prepare(task);
+ return -EAGAIN;
+ }
+
+ if (data->verf.committed == NFS_UNSTABLE)
+ pnfs_commit_set_layoutcommit(data);
+
+ return 0;
+}
+
+static int ff_layout_write_prepare_common(struct rpc_task *task,
+ struct nfs_pgio_header *hdr)
+{
+ if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
+ rpc_exit(task, -EIO);
+ return -EIO;
+ }
+
+ if (ff_layout_reset_to_mds(hdr->lseg, hdr->pgio_mirror_idx)) {
+ bool retry_pnfs;
+
+ retry_pnfs = ff_layout_has_available_ds(hdr->lseg);
+ dprintk("%s task %u reset io to %s\n", __func__,
+ task->tk_pid, retry_pnfs ? "pNFS" : "MDS");
+ ff_layout_reset_write(hdr, retry_pnfs);
+ rpc_exit(task, 0);
+ return -EAGAIN;
+ }
+
+ return 0;
+}
+
+static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data)
+{
+ struct nfs_pgio_header *hdr = data;
+
+ if (ff_layout_write_prepare_common(task, hdr))
+ return;
+
+ rpc_call_start(task);
+}
+
+static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data)
+{
+ struct nfs_pgio_header *hdr = data;
+
+ if (ff_layout_write_prepare_common(task, hdr))
+ return;
+
+ if (ff_layout_setup_sequence(hdr->ds_clp,
+ &hdr->args.seq_args,
+ &hdr->res.seq_res,
+ task))
+ return;
+
+ if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
+ hdr->args.lock_context, FMODE_WRITE) == -EIO)
+ rpc_exit(task, -EIO); /* lost lock, terminate I/O */
+}
+
+static void ff_layout_write_call_done(struct rpc_task *task, void *data)
+{
+ struct nfs_pgio_header *hdr = data;
+
+ if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
+ task->tk_status == 0) {
+ nfs4_sequence_done(task, &hdr->res.seq_res);
+ return;
+ }
+
+ /* Note this may cause RPC to be resent */
+ hdr->mds_ops->rpc_call_done(task, hdr);
+}
+
+static void ff_layout_write_count_stats(struct rpc_task *task, void *data)
+{
+ struct nfs_pgio_header *hdr = data;
+
+ rpc_count_iostats_metrics(task,
+ &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]);
+}
+
+static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data)
+{
+ rpc_call_start(task);
+}
+
+static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data)
+{
+ struct nfs_commit_data *wdata = data;
+
+ ff_layout_setup_sequence(wdata->ds_clp,
+ &wdata->args.seq_args,
+ &wdata->res.seq_res,
+ task);
+}
+
+static void ff_layout_commit_count_stats(struct rpc_task *task, void *data)
+{
+ struct nfs_commit_data *cdata = data;
+
+ rpc_count_iostats_metrics(task,
+ &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]);
+}
+
+static const struct rpc_call_ops ff_layout_read_call_ops_v3 = {
+ .rpc_call_prepare = ff_layout_read_prepare_v3,
+ .rpc_call_done = ff_layout_read_call_done,
+ .rpc_count_stats = ff_layout_read_count_stats,
+ .rpc_release = pnfs_generic_rw_release,
+};
+
+static const struct rpc_call_ops ff_layout_read_call_ops_v4 = {
+ .rpc_call_prepare = ff_layout_read_prepare_v4,
+ .rpc_call_done = ff_layout_read_call_done,
+ .rpc_count_stats = ff_layout_read_count_stats,
+ .rpc_release = pnfs_generic_rw_release,
+};
+
+static const struct rpc_call_ops ff_layout_write_call_ops_v3 = {
+ .rpc_call_prepare = ff_layout_write_prepare_v3,
+ .rpc_call_done = ff_layout_write_call_done,
+ .rpc_count_stats = ff_layout_write_count_stats,
+ .rpc_release = pnfs_generic_rw_release,
+};
+
+static const struct rpc_call_ops ff_layout_write_call_ops_v4 = {
+ .rpc_call_prepare = ff_layout_write_prepare_v4,
+ .rpc_call_done = ff_layout_write_call_done,
+ .rpc_count_stats = ff_layout_write_count_stats,
+ .rpc_release = pnfs_generic_rw_release,
+};
+
+static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = {
+ .rpc_call_prepare = ff_layout_commit_prepare_v3,
+ .rpc_call_done = pnfs_generic_write_commit_done,
+ .rpc_count_stats = ff_layout_commit_count_stats,
+ .rpc_release = pnfs_generic_commit_release,
+};
+
+static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = {
+ .rpc_call_prepare = ff_layout_commit_prepare_v4,
+ .rpc_call_done = pnfs_generic_write_commit_done,
+ .rpc_count_stats = ff_layout_commit_count_stats,
+ .rpc_release = pnfs_generic_commit_release,
+};
+
+static enum pnfs_try_status
+ff_layout_read_pagelist(struct nfs_pgio_header *hdr)
+{
+ struct pnfs_layout_segment *lseg = hdr->lseg;
+ struct nfs4_pnfs_ds *ds;
+ struct rpc_clnt *ds_clnt;
+ struct rpc_cred *ds_cred;
+ loff_t offset = hdr->args.offset;
+ u32 idx = hdr->pgio_mirror_idx;
+ int vers;
+ struct nfs_fh *fh;
+
+ dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n",
+ __func__, hdr->inode->i_ino,
+ hdr->args.pgbase, (size_t)hdr->args.count, offset);
+
+ ds = nfs4_ff_layout_prepare_ds(lseg, idx, false);
+ if (!ds)
+ goto out_failed;
+
+ ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp,
+ hdr->inode);
+ if (IS_ERR(ds_clnt))
+ goto out_failed;
+
+ ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred);
+ if (IS_ERR(ds_cred))
+ goto out_failed;
+
+ vers = nfs4_ff_layout_ds_version(lseg, idx);
+
+ dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__,
+ ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count), vers);
+
+ atomic_inc(&ds->ds_clp->cl_count);
+ hdr->ds_clp = ds->ds_clp;
+ fh = nfs4_ff_layout_select_ds_fh(lseg, idx);
+ if (fh)
+ hdr->args.fh = fh;
+
+ /*
+ * Note that if we ever decide to split across DSes,
+ * then we may need to handle dense-like offsets.
+ */
+ hdr->args.offset = offset;
+ hdr->mds_offset = offset;
+
+ /* Perform an asynchronous read to ds */
+ nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
+ vers == 3 ? &ff_layout_read_call_ops_v3 :
+ &ff_layout_read_call_ops_v4,
+ 0, RPC_TASK_SOFTCONN);
+
+ return PNFS_ATTEMPTED;
+
+out_failed:
+ if (ff_layout_has_available_ds(lseg))
+ return PNFS_TRY_AGAIN;
+ return PNFS_NOT_ATTEMPTED;
+}
+
+/* Perform async writes. */
+static enum pnfs_try_status
+ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
+{
+ struct pnfs_layout_segment *lseg = hdr->lseg;
+ struct nfs4_pnfs_ds *ds;
+ struct rpc_clnt *ds_clnt;
+ struct rpc_cred *ds_cred;
+ loff_t offset = hdr->args.offset;
+ int vers;
+ struct nfs_fh *fh;
+ int idx = hdr->pgio_mirror_idx;
+
+ ds = nfs4_ff_layout_prepare_ds(lseg, idx, true);
+ if (!ds)
+ return PNFS_NOT_ATTEMPTED;
+
+ ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp,
+ hdr->inode);
+ if (IS_ERR(ds_clnt))
+ return PNFS_NOT_ATTEMPTED;
+
+ ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred);
+ if (IS_ERR(ds_cred))
+ return PNFS_NOT_ATTEMPTED;
+
+ vers = nfs4_ff_layout_ds_version(lseg, idx);
+
+ dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d vers %d\n",
+ __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count,
+ offset, ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count),
+ vers);
+
+ hdr->pgio_done_cb = ff_layout_write_done_cb;
+ atomic_inc(&ds->ds_clp->cl_count);
+ hdr->ds_clp = ds->ds_clp;
+ hdr->ds_commit_idx = idx;
+ fh = nfs4_ff_layout_select_ds_fh(lseg, idx);
+ if (fh)
+ hdr->args.fh = fh;
+
+ /*
+ * Note that if we ever decide to split across DSes,
+ * then we may need to handle dense-like offsets.
+ */
+ hdr->args.offset = offset;
+
+ /* Perform an asynchronous write */
+ nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
+ vers == 3 ? &ff_layout_write_call_ops_v3 :
+ &ff_layout_write_call_ops_v4,
+ sync, RPC_TASK_SOFTCONN);
+ return PNFS_ATTEMPTED;
+}
+
+static void
+ff_layout_mark_request_commit(struct nfs_page *req,
+ struct pnfs_layout_segment *lseg,
+ struct nfs_commit_info *cinfo,
+ u32 ds_commit_idx)
+{
+ struct list_head *list;
+ struct pnfs_commit_bucket *buckets;
+
+ spin_lock(cinfo->lock);
+ buckets = cinfo->ds->buckets;
+ list = &buckets[ds_commit_idx].written;
+ if (list_empty(list)) {
+ /* Non-empty buckets hold a reference on the lseg. That ref
+ * 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
+ * pnfs_common_clear_request_commit
+ */
+ WARN_ON_ONCE(buckets[ds_commit_idx].wlseg != NULL);
+ buckets[ds_commit_idx].wlseg = pnfs_get_lseg(lseg);
+ }
+ set_bit(PG_COMMIT_TO_DS, &req->wb_flags);
+ cinfo->ds->nwritten++;
+
+ /* nfs_request_add_commit_list(). We need to add req to list without
+ * dropping cinfo lock.
+ */
+ set_bit(PG_CLEAN, &(req)->wb_flags);
+ nfs_list_add_request(req, list);
+ cinfo->mds->ncommit++;
+ spin_unlock(cinfo->lock);
+ if (!cinfo->dreq) {
+ inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
+ inc_bdi_stat(page_file_mapping(req->wb_page)->backing_dev_info,
+ BDI_RECLAIMABLE);
+ __mark_inode_dirty(req->wb_context->dentry->d_inode,
+ I_DIRTY_DATASYNC);
+ }
+}
+
+static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)
+{
+ return i;
+}
+
+static struct nfs_fh *
+select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i)
+{
+ struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg);
+
+ /* FIXME: Assume that there is only one NFS version available
+ * for the DS.
+ */
+ return &flseg->mirror_array[i]->fh_versions[0];
+}
+
+static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how)
+{
+ struct pnfs_layout_segment *lseg = data->lseg;
+ struct nfs4_pnfs_ds *ds;
+ struct rpc_clnt *ds_clnt;
+ struct rpc_cred *ds_cred;
+ u32 idx;
+ int vers;
+ struct nfs_fh *fh;
+
+ idx = calc_ds_index_from_commit(lseg, data->ds_commit_index);
+ ds = nfs4_ff_layout_prepare_ds(lseg, idx, true);
+ if (!ds)
+ goto out_err;
+
+ ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp,
+ data->inode);
+ if (IS_ERR(ds_clnt))
+ goto out_err;
+
+ ds_cred = ff_layout_get_ds_cred(lseg, idx, data->cred);
+ if (IS_ERR(ds_cred))
+ goto out_err;
+
+ vers = nfs4_ff_layout_ds_version(lseg, idx);
+
+ dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__,
+ data->inode->i_ino, how, atomic_read(&ds->ds_clp->cl_count),
+ vers);
+ data->commit_done_cb = ff_layout_commit_done_cb;
+ data->cred = ds_cred;
+ atomic_inc(&ds->ds_clp->cl_count);
+ data->ds_clp = ds->ds_clp;
+ fh = select_ds_fh_from_commit(lseg, data->ds_commit_index);
+ if (fh)
+ data->args.fh = fh;
+ return nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops,
+ vers == 3 ? &ff_layout_commit_call_ops_v3 :
+ &ff_layout_commit_call_ops_v4,
+ how, RPC_TASK_SOFTCONN);
+out_err:
+ pnfs_generic_prepare_to_resend_writes(data);
+ pnfs_generic_commit_release(data);
+ return -EAGAIN;
+}
+
+static int
+ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages,
+ int how, struct nfs_commit_info *cinfo)
+{
+ return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo,
+ ff_layout_initiate_commit);
+}
+
+static struct pnfs_ds_commit_info *
+ff_layout_get_ds_info(struct inode *inode)
+{
+ struct pnfs_layout_hdr *layout = NFS_I(inode)->layout;
+
+ if (layout == NULL)
+ return NULL;
+
+ return &FF_LAYOUT_FROM_HDR(layout)->commit_info;
+}
+
+static void
+ff_layout_free_deveiceid_node(struct nfs4_deviceid_node *d)
+{
+ nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds,
+ id_node));
+}
+
+static int ff_layout_encode_ioerr(struct nfs4_flexfile_layout *flo,
+ struct xdr_stream *xdr,
+ const struct nfs4_layoutreturn_args *args)
+{
+ struct pnfs_layout_hdr *hdr = &flo->generic_hdr;
+ __be32 *start;
+ int count = 0, ret = 0;
+
+ start = xdr_reserve_space(xdr, 4);
+ if (unlikely(!start))
+ return -E2BIG;
+
+ /* This assume we always return _ALL_ layouts */
+ spin_lock(&hdr->plh_inode->i_lock);
+ ret = ff_layout_encode_ds_ioerr(flo, xdr, &count, &args->range);
+ spin_unlock(&hdr->plh_inode->i_lock);
+
+ *start = cpu_to_be32(count);
+
+ return ret;
+}
+
+/* report nothing for now */
+static void ff_layout_encode_iostats(struct nfs4_flexfile_layout *flo,
+ struct xdr_stream *xdr,
+ const struct nfs4_layoutreturn_args *args)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, 4);
+ if (likely(p))
+ *p = cpu_to_be32(0);
+}
+
+static struct nfs4_deviceid_node *
+ff_layout_alloc_deviceid_node(struct nfs_server *server,
+ struct pnfs_device *pdev, gfp_t gfp_flags)
+{
+ struct nfs4_ff_layout_ds *dsaddr;
+
+ dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags);
+ if (!dsaddr)
+ return NULL;
+ return &dsaddr->id_node;
+}
+
+static void
+ff_layout_encode_layoutreturn(struct pnfs_layout_hdr *lo,
+ struct xdr_stream *xdr,
+ const struct nfs4_layoutreturn_args *args)
+{
+ struct nfs4_flexfile_layout *flo = FF_LAYOUT_FROM_HDR(lo);
+ __be32 *start;
+
+ dprintk("%s: Begin\n", __func__);
+ start = xdr_reserve_space(xdr, 4);
+ BUG_ON(!start);
+
+ if (ff_layout_encode_ioerr(flo, xdr, args))
+ goto out;
+
+ ff_layout_encode_iostats(flo, xdr, args);
+out:
+ *start = cpu_to_be32((xdr->p - start - 1) * 4);
+ dprintk("%s: Return\n", __func__);
+}
+
+static struct pnfs_layoutdriver_type flexfilelayout_type = {
+ .id = LAYOUT_FLEX_FILES,
+ .name = "LAYOUT_FLEX_FILES",
+ .owner = THIS_MODULE,
+ .alloc_layout_hdr = ff_layout_alloc_layout_hdr,
+ .free_layout_hdr = ff_layout_free_layout_hdr,
+ .alloc_lseg = ff_layout_alloc_lseg,
+ .free_lseg = ff_layout_free_lseg,
+ .pg_read_ops = &ff_layout_pg_read_ops,
+ .pg_write_ops = &ff_layout_pg_write_ops,
+ .get_ds_info = ff_layout_get_ds_info,
+ .free_deviceid_node = ff_layout_free_deveiceid_node,
+ .mark_request_commit = ff_layout_mark_request_commit,
+ .clear_request_commit = pnfs_generic_clear_request_commit,
+ .scan_commit_lists = pnfs_generic_scan_commit_lists,
+ .recover_commit_reqs = pnfs_generic_recover_commit_reqs,
+ .commit_pagelist = ff_layout_commit_pagelist,
+ .read_pagelist = ff_layout_read_pagelist,
+ .write_pagelist = ff_layout_write_pagelist,
+ .alloc_deviceid_node = ff_layout_alloc_deviceid_node,
+ .encode_layoutreturn = ff_layout_encode_layoutreturn,
+};
+
+static int __init nfs4flexfilelayout_init(void)
+{
+ printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n",
+ __func__);
+ return pnfs_register_layoutdriver(&flexfilelayout_type);
+}
+
+static void __exit nfs4flexfilelayout_exit(void)
+{
+ printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n",
+ __func__);
+ pnfs_unregister_layoutdriver(&flexfilelayout_type);
+}
+
+MODULE_ALIAS("nfs-layouttype4-4");
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("The NFSv4 flexfile layout driver");
+
+module_init(nfs4flexfilelayout_init);
+module_exit(nfs4flexfilelayout_exit);
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.h b/fs/nfs/flexfilelayout/flexfilelayout.h
new file mode 100644
index 0000000..070f204
--- /dev/null
+++ b/fs/nfs/flexfilelayout/flexfilelayout.h
@@ -0,0 +1,155 @@
+/*
+ * NFSv4 flexfile layout driver data structures.
+ *
+ * Copyright (c) 2014, Primary Data, Inc. All rights reserved.
+ *
+ * Tao Peng <bergwolf@primarydata.com>
+ */
+
+#ifndef FS_NFS_NFS4FLEXFILELAYOUT_H
+#define FS_NFS_NFS4FLEXFILELAYOUT_H
+
+#include "../pnfs.h"
+
+/* XXX: Let's filter out insanely large mirror count for now to avoid oom
+ * due to network error etc. */
+#define NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT 4096
+
+struct nfs4_ff_ds_version {
+ u32 version;
+ u32 minor_version;
+ u32 rsize;
+ u32 wsize;
+ bool tightly_coupled;
+};
+
+/* chained in global deviceid hlist */
+struct nfs4_ff_layout_ds {
+ struct nfs4_deviceid_node id_node;
+ u32 ds_versions_cnt;
+ struct nfs4_ff_ds_version *ds_versions;
+ struct nfs4_pnfs_ds *ds;
+};
+
+struct nfs4_ff_layout_ds_err {
+ struct list_head list; /* linked in mirror error_list */
+ u64 offset;
+ u64 length;
+ int status;
+ enum nfs_opnum4 opnum;
+ nfs4_stateid stateid;
+ struct nfs4_deviceid deviceid;
+};
+
+struct nfs4_ff_layout_mirror {
+ u32 ds_count;
+ u32 efficiency;
+ struct nfs4_ff_layout_ds *mirror_ds;
+ u32 fh_versions_cnt;
+ struct nfs_fh *fh_versions;
+ nfs4_stateid stateid;
+ struct nfs4_string user_name;
+ struct nfs4_string group_name;
+ u32 uid;
+ u32 gid;
+ struct rpc_cred *cred;
+ spinlock_t lock;
+};
+
+struct nfs4_ff_layout_segment {
+ struct pnfs_layout_segment generic_hdr;
+ u64 stripe_unit;
+ u32 mirror_array_cnt;
+ struct nfs4_ff_layout_mirror **mirror_array;
+};
+
+struct nfs4_flexfile_layout {
+ struct pnfs_layout_hdr generic_hdr;
+ struct pnfs_ds_commit_info commit_info;
+ struct list_head error_list; /* nfs4_ff_layout_ds_err */
+};
+
+static inline struct nfs4_flexfile_layout *
+FF_LAYOUT_FROM_HDR(struct pnfs_layout_hdr *lo)
+{
+ return container_of(lo, struct nfs4_flexfile_layout, generic_hdr);
+}
+
+static inline struct nfs4_ff_layout_segment *
+FF_LAYOUT_LSEG(struct pnfs_layout_segment *lseg)
+{
+ return container_of(lseg,
+ struct nfs4_ff_layout_segment,
+ generic_hdr);
+}
+
+static inline struct nfs4_deviceid_node *
+FF_LAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg, u32 idx)
+{
+ if (idx >= FF_LAYOUT_LSEG(lseg)->mirror_array_cnt ||
+ FF_LAYOUT_LSEG(lseg)->mirror_array[idx] == NULL ||
+ FF_LAYOUT_LSEG(lseg)->mirror_array[idx]->mirror_ds == NULL)
+ return NULL;
+ return &FF_LAYOUT_LSEG(lseg)->mirror_array[idx]->mirror_ds->id_node;
+}
+
+static inline struct nfs4_ff_layout_ds *
+FF_LAYOUT_MIRROR_DS(struct nfs4_deviceid_node *node)
+{
+ return container_of(node, struct nfs4_ff_layout_ds, id_node);
+}
+
+static inline struct nfs4_ff_layout_mirror *
+FF_LAYOUT_COMP(struct pnfs_layout_segment *lseg, u32 idx)
+{
+ if (idx >= FF_LAYOUT_LSEG(lseg)->mirror_array_cnt)
+ return NULL;
+ return FF_LAYOUT_LSEG(lseg)->mirror_array[idx];
+}
+
+static inline u32
+FF_LAYOUT_MIRROR_COUNT(struct pnfs_layout_segment *lseg)
+{
+ return FF_LAYOUT_LSEG(lseg)->mirror_array_cnt;
+}
+
+static inline bool
+ff_layout_test_devid_unavailable(struct nfs4_deviceid_node *node)
+{
+ return nfs4_test_deviceid_unavailable(node);
+}
+
+static inline int
+nfs4_ff_layout_ds_version(struct pnfs_layout_segment *lseg, u32 ds_idx)
+{
+ return FF_LAYOUT_COMP(lseg, ds_idx)->mirror_ds->ds_versions[0].version;
+}
+
+struct nfs4_ff_layout_ds *
+nfs4_ff_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *pdev,
+ gfp_t gfp_flags);
+void nfs4_ff_layout_put_deviceid(struct nfs4_ff_layout_ds *mirror_ds);
+void nfs4_ff_layout_free_deviceid(struct nfs4_ff_layout_ds *mirror_ds);
+int ff_layout_track_ds_error(struct nfs4_flexfile_layout *flo,
+ struct nfs4_ff_layout_mirror *mirror, u64 offset,
+ u64 length, int status, enum nfs_opnum4 opnum,
+ gfp_t gfp_flags);
+int ff_layout_encode_ds_ioerr(struct nfs4_flexfile_layout *flo,
+ struct xdr_stream *xdr, int *count,
+ const struct pnfs_layout_range *range);
+struct nfs_fh *
+nfs4_ff_layout_select_ds_fh(struct pnfs_layout_segment *lseg, u32 mirror_idx);
+
+struct nfs4_pnfs_ds *
+nfs4_ff_layout_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx,
+ bool fail_return);
+
+struct rpc_clnt *
+nfs4_ff_find_or_create_ds_client(struct pnfs_layout_segment *lseg,
+ u32 ds_idx,
+ struct nfs_client *ds_clp,
+ struct inode *inode);
+struct rpc_cred *ff_layout_get_ds_cred(struct pnfs_layout_segment *lseg,
+ u32 ds_idx, struct rpc_cred *mdscred);
+bool ff_layout_has_available_ds(struct pnfs_layout_segment *lseg);
+#endif /* FS_NFS_NFS4FLEXFILELAYOUT_H */
diff --git a/fs/nfs/flexfilelayout/flexfilelayoutdev.c b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
new file mode 100644
index 0000000..3bbb16b
--- /dev/null
+++ b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
@@ -0,0 +1,552 @@
+/*
+ * Device operations for the pnfs nfs4 file layout driver.
+ *
+ * Copyright (c) 2014, Primary Data, Inc. All rights reserved.
+ *
+ * Tao Peng <bergwolf@primarydata.com>
+ */
+
+#include <linux/nfs_fs.h>
+#include <linux/vmalloc.h>
+#include <linux/module.h>
+#include <linux/sunrpc/addr.h>
+
+#include "../internal.h"
+#include "../nfs4session.h"
+#include "flexfilelayout.h"
+
+#define NFSDBG_FACILITY NFSDBG_PNFS_LD
+
+static unsigned int dataserver_timeo = NFS4_DEF_DS_TIMEO;
+static unsigned int dataserver_retrans = NFS4_DEF_DS_RETRANS;
+
+void nfs4_ff_layout_put_deviceid(struct nfs4_ff_layout_ds *mirror_ds)
+{
+ if (mirror_ds)
+ nfs4_put_deviceid_node(&mirror_ds->id_node);
+}
+
+void nfs4_ff_layout_free_deviceid(struct nfs4_ff_layout_ds *mirror_ds)
+{
+ nfs4_print_deviceid(&mirror_ds->id_node.deviceid);
+ nfs4_pnfs_ds_put(mirror_ds->ds);
+ kfree(mirror_ds);
+}
+
+/* Decode opaque device data and construct new_ds using it */
+struct nfs4_ff_layout_ds *
+nfs4_ff_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *pdev,
+ gfp_t gfp_flags)
+{
+ struct xdr_stream stream;
+ struct xdr_buf buf;
+ struct page *scratch;
+ struct list_head dsaddrs;
+ struct nfs4_pnfs_ds_addr *da;
+ struct nfs4_ff_layout_ds *new_ds = NULL;
+ struct nfs4_ff_ds_version *ds_versions = NULL;
+ u32 mp_count;
+ u32 version_count;
+ __be32 *p;
+ int i, ret = -ENOMEM;
+
+ /* set up xdr stream */
+ scratch = alloc_page(gfp_flags);
+ if (!scratch)
+ goto out_err;
+
+ new_ds = kzalloc(sizeof(struct nfs4_ff_layout_ds), gfp_flags);
+ if (!new_ds)
+ goto out_scratch;
+
+ nfs4_init_deviceid_node(&new_ds->id_node,
+ server,
+ &pdev->dev_id);
+ INIT_LIST_HEAD(&dsaddrs);
+
+ xdr_init_decode_pages(&stream, &buf, pdev->pages, pdev->pglen);
+ xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
+
+ /* multipath count */
+ p = xdr_inline_decode(&stream, 4);
+ if (unlikely(!p))
+ goto out_err_drain_dsaddrs;
+ mp_count = be32_to_cpup(p);
+ dprintk("%s: multipath ds count %d\n", __func__, mp_count);
+
+ for (i = 0; i < mp_count; i++) {
+ /* multipath ds */
+ da = nfs4_decode_mp_ds_addr(server->nfs_client->cl_net,
+ &stream, gfp_flags);
+ if (da)
+ list_add_tail(&da->da_node, &dsaddrs);
+ }
+ if (list_empty(&dsaddrs)) {
+ dprintk("%s: no suitable DS addresses found\n",
+ __func__);
+ ret = -ENOMEDIUM;
+ goto out_err_drain_dsaddrs;
+ }
+
+ /* version count */
+ p = xdr_inline_decode(&stream, 4);
+ if (unlikely(!p))
+ goto out_err_drain_dsaddrs;
+ version_count = be32_to_cpup(p);
+ dprintk("%s: version count %d\n", __func__, version_count);
+
+ ds_versions = kzalloc(version_count * sizeof(struct nfs4_ff_ds_version),
+ gfp_flags);
+ if (!ds_versions)
+ goto out_scratch;
+
+ for (i = 0; i < version_count; i++) {
+ /* 20 = version(4) + minor_version(4) + rsize(4) + wsize(4) +
+ * tightly_coupled(4) */
+ p = xdr_inline_decode(&stream, 20);
+ if (unlikely(!p))
+ goto out_err_drain_dsaddrs;
+ ds_versions[i].version = be32_to_cpup(p++);
+ ds_versions[i].minor_version = be32_to_cpup(p++);
+ ds_versions[i].rsize = nfs_block_size(be32_to_cpup(p++), NULL);
+ ds_versions[i].wsize = nfs_block_size(be32_to_cpup(p++), NULL);
+ ds_versions[i].tightly_coupled = be32_to_cpup(p);
+
+ if (ds_versions[i].rsize > NFS_MAX_FILE_IO_SIZE)
+ ds_versions[i].rsize = NFS_MAX_FILE_IO_SIZE;
+ if (ds_versions[i].wsize > NFS_MAX_FILE_IO_SIZE)
+ ds_versions[i].wsize = NFS_MAX_FILE_IO_SIZE;
+
+ if (ds_versions[i].version != 3 || ds_versions[i].minor_version != 0) {
+ dprintk("%s: [%d] unsupported ds version %d-%d\n", __func__,
+ i, ds_versions[i].version,
+ ds_versions[i].minor_version);
+ ret = -EPROTONOSUPPORT;
+ goto out_err_drain_dsaddrs;
+ }
+
+ dprintk("%s: [%d] vers %u minor_ver %u rsize %u wsize %u coupled %d\n",
+ __func__, i, ds_versions[i].version,
+ ds_versions[i].minor_version,
+ ds_versions[i].rsize,
+ ds_versions[i].wsize,
+ ds_versions[i].tightly_coupled);
+ }
+
+ new_ds->ds_versions = ds_versions;
+ new_ds->ds_versions_cnt = version_count;
+
+ new_ds->ds = nfs4_pnfs_ds_add(&dsaddrs, gfp_flags);
+ if (!new_ds->ds)
+ goto out_err_drain_dsaddrs;
+
+ /* If DS was already in cache, free ds addrs */
+ while (!list_empty(&dsaddrs)) {
+ da = list_first_entry(&dsaddrs,
+ struct nfs4_pnfs_ds_addr,
+ da_node);
+ list_del_init(&da->da_node);
+ kfree(da->da_remotestr);
+ kfree(da);
+ }
+
+ __free_page(scratch);
+ return new_ds;
+
+out_err_drain_dsaddrs:
+ while (!list_empty(&dsaddrs)) {
+ da = list_first_entry(&dsaddrs, struct nfs4_pnfs_ds_addr,
+ da_node);
+ list_del_init(&da->da_node);
+ kfree(da->da_remotestr);
+ kfree(da);
+ }
+
+ kfree(ds_versions);
+out_scratch:
+ __free_page(scratch);
+out_err:
+ kfree(new_ds);
+
+ dprintk("%s ERROR: returning %d\n", __func__, ret);
+ return NULL;
+}
+
+static u64
+end_offset(u64 start, u64 len)
+{
+ u64 end;
+
+ end = start + len;
+ return end >= start ? end : NFS4_MAX_UINT64;
+}
+
+static void extend_ds_error(struct nfs4_ff_layout_ds_err *err,
+ u64 offset, u64 length)
+{
+ u64 end;
+
+ end = max_t(u64, end_offset(err->offset, err->length),
+ end_offset(offset, length));
+ err->offset = min_t(u64, err->offset, offset);
+ err->length = end - err->offset;
+}
+
+static bool ds_error_can_merge(struct nfs4_ff_layout_ds_err *err, u64 offset,
+ u64 length, int status, enum nfs_opnum4 opnum,
+ nfs4_stateid *stateid,
+ struct nfs4_deviceid *deviceid)
+{
+ return err->status == status && err->opnum == opnum &&
+ nfs4_stateid_match(&err->stateid, stateid) &&
+ !memcmp(&err->deviceid, deviceid, sizeof(*deviceid)) &&
+ end_offset(err->offset, err->length) >= offset &&
+ err->offset <= end_offset(offset, length);
+}
+
+static bool merge_ds_error(struct nfs4_ff_layout_ds_err *old,
+ struct nfs4_ff_layout_ds_err *new)
+{
+ if (!ds_error_can_merge(old, new->offset, new->length, new->status,
+ new->opnum, &new->stateid, &new->deviceid))
+ return false;
+
+ extend_ds_error(old, new->offset, new->length);
+ return true;
+}
+
+static bool
+ff_layout_add_ds_error_locked(struct nfs4_flexfile_layout *flo,
+ struct nfs4_ff_layout_ds_err *dserr)
+{
+ struct nfs4_ff_layout_ds_err *err;
+
+ list_for_each_entry(err, &flo->error_list, list) {
+ if (merge_ds_error(err, dserr)) {
+ return true;
+ }
+ }
+
+ list_add(&dserr->list, &flo->error_list);
+ return false;
+}
+
+static bool
+ff_layout_update_ds_error(struct nfs4_flexfile_layout *flo, u64 offset,
+ u64 length, int status, enum nfs_opnum4 opnum,
+ nfs4_stateid *stateid, struct nfs4_deviceid *deviceid)
+{
+ bool found = false;
+ struct nfs4_ff_layout_ds_err *err;
+
+ list_for_each_entry(err, &flo->error_list, list) {
+ if (ds_error_can_merge(err, offset, length, status, opnum,
+ stateid, deviceid)) {
+ found = true;
+ extend_ds_error(err, offset, length);
+ break;
+ }
+ }
+
+ return found;
+}
+
+int ff_layout_track_ds_error(struct nfs4_flexfile_layout *flo,
+ struct nfs4_ff_layout_mirror *mirror, u64 offset,
+ u64 length, int status, enum nfs_opnum4 opnum,
+ gfp_t gfp_flags)
+{
+ struct nfs4_ff_layout_ds_err *dserr;
+ bool needfree;
+
+ if (status == 0)
+ return 0;
+
+ if (mirror->mirror_ds == NULL)
+ return -EINVAL;
+
+ spin_lock(&flo->generic_hdr.plh_inode->i_lock);
+ if (ff_layout_update_ds_error(flo, offset, length, status, opnum,
+ &mirror->stateid,
+ &mirror->mirror_ds->id_node.deviceid)) {
+ spin_unlock(&flo->generic_hdr.plh_inode->i_lock);
+ return 0;
+ }
+ spin_unlock(&flo->generic_hdr.plh_inode->i_lock);
+ dserr = kmalloc(sizeof(*dserr), gfp_flags);
+ if (!dserr)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&dserr->list);
+ dserr->offset = offset;
+ dserr->length = length;
+ dserr->status = status;
+ dserr->opnum = opnum;
+ nfs4_stateid_copy(&dserr->stateid, &mirror->stateid);
+ memcpy(&dserr->deviceid, &mirror->mirror_ds->id_node.deviceid,
+ NFS4_DEVICEID4_SIZE);
+
+ spin_lock(&flo->generic_hdr.plh_inode->i_lock);
+ needfree = ff_layout_add_ds_error_locked(flo, dserr);
+ spin_unlock(&flo->generic_hdr.plh_inode->i_lock);
+ if (needfree)
+ kfree(dserr);
+
+ return 0;
+}
+
+/* currently we only support AUTH_NONE and AUTH_SYS */
+static rpc_authflavor_t
+nfs4_ff_layout_choose_authflavor(struct nfs4_ff_layout_mirror *mirror)
+{
+ if (mirror->uid == (u32)-1)
+ return RPC_AUTH_NULL;
+ return RPC_AUTH_UNIX;
+}
+
+/* fetch cred for NFSv3 DS */
+static int ff_layout_update_mirror_cred(struct nfs4_ff_layout_mirror *mirror,
+ struct nfs4_pnfs_ds *ds)
+{
+ if (ds->ds_clp && !mirror->cred &&
+ mirror->mirror_ds->ds_versions[0].version == 3) {
+ struct rpc_auth *auth = ds->ds_clp->cl_rpcclient->cl_auth;
+ struct rpc_cred *cred;
+ struct auth_cred acred = {
+ .uid = make_kuid(&init_user_ns, mirror->uid),
+ .gid = make_kgid(&init_user_ns, mirror->gid),
+ };
+
+ /* AUTH_NULL ignores acred */
+ cred = auth->au_ops->lookup_cred(auth, &acred, 0);
+ if (IS_ERR(cred)) {
+ dprintk("%s: lookup_cred failed with %ld\n",
+ __func__, PTR_ERR(cred));
+ return PTR_ERR(cred);
+ } else {
+ mirror->cred = cred;
+ }
+ }
+ return 0;
+}
+
+struct nfs_fh *
+nfs4_ff_layout_select_ds_fh(struct pnfs_layout_segment *lseg, u32 mirror_idx)
+{
+ struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, mirror_idx);
+ struct nfs_fh *fh = NULL;
+ struct nfs4_deviceid_node *devid;
+
+ if (mirror == NULL || mirror->mirror_ds == NULL ||
+ mirror->mirror_ds->ds == NULL) {
+ printk(KERN_ERR "NFS: %s: No data server for mirror offset index %d\n",
+ __func__, mirror_idx);
+ if (mirror && mirror->mirror_ds) {
+ devid = &mirror->mirror_ds->id_node;
+ pnfs_generic_mark_devid_invalid(devid);
+ }
+ goto out;
+ }
+
+ /* FIXME: For now assume there is only 1 version available for the DS */
+ fh = &mirror->fh_versions[0];
+out:
+ return fh;
+}
+
+/* Upon return, either ds is connected, or ds is NULL */
+struct nfs4_pnfs_ds *
+nfs4_ff_layout_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx,
+ bool fail_return)
+{
+ struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, ds_idx);
+ struct nfs4_pnfs_ds *ds = NULL;
+ struct nfs4_deviceid_node *devid;
+ struct inode *ino = lseg->pls_layout->plh_inode;
+ struct nfs_server *s = NFS_SERVER(ino);
+ unsigned int max_payload;
+ rpc_authflavor_t flavor;
+
+ if (mirror == NULL || mirror->mirror_ds == NULL ||
+ mirror->mirror_ds->ds == NULL) {
+ printk(KERN_ERR "NFS: %s: No data server for offset index %d\n",
+ __func__, ds_idx);
+ if (mirror && mirror->mirror_ds) {
+ devid = &mirror->mirror_ds->id_node;
+ pnfs_generic_mark_devid_invalid(devid);
+ }
+ goto out;
+ }
+
+ devid = &mirror->mirror_ds->id_node;
+ if (ff_layout_test_devid_unavailable(devid))
+ goto out;
+
+ ds = mirror->mirror_ds->ds;
+ /* matching smp_wmb() in _nfs4_pnfs_v3/4_ds_connect */
+ smp_rmb();
+ if (ds->ds_clp)
+ goto out;
+
+ flavor = nfs4_ff_layout_choose_authflavor(mirror);
+
+ /* FIXME: For now we assume the server sent only one version of NFS
+ * to use for the DS.
+ */
+ nfs4_pnfs_ds_connect(s, ds, devid, dataserver_timeo,
+ dataserver_retrans,
+ mirror->mirror_ds->ds_versions[0].version,
+ mirror->mirror_ds->ds_versions[0].minor_version,
+ flavor);
+
+ /* connect success, check rsize/wsize limit */
+ if (ds->ds_clp) {
+ max_payload =
+ nfs_block_size(rpc_max_payload(ds->ds_clp->cl_rpcclient),
+ NULL);
+ if (mirror->mirror_ds->ds_versions[0].rsize > max_payload)
+ mirror->mirror_ds->ds_versions[0].rsize = max_payload;
+ if (mirror->mirror_ds->ds_versions[0].wsize > max_payload)
+ mirror->mirror_ds->ds_versions[0].wsize = max_payload;
+ } else {
+ ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout),
+ mirror, lseg->pls_range.offset,
+ lseg->pls_range.length, NFS4ERR_NXIO,
+ OP_ILLEGAL, GFP_NOIO);
+ if (fail_return) {
+ pnfs_error_mark_layout_for_return(ino, lseg);
+ if (ff_layout_has_available_ds(lseg))
+ pnfs_set_retry_layoutget(lseg->pls_layout);
+ else
+ pnfs_clear_retry_layoutget(lseg->pls_layout);
+
+ } else {
+ if (ff_layout_has_available_ds(lseg))
+ set_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
+ &lseg->pls_layout->plh_flags);
+ else {
+ pnfs_error_mark_layout_for_return(ino, lseg);
+ pnfs_clear_retry_layoutget(lseg->pls_layout);
+ }
+ }
+ }
+
+ if (ff_layout_update_mirror_cred(mirror, ds))
+ ds = NULL;
+out:
+ return ds;
+}
+
+struct rpc_cred *
+ff_layout_get_ds_cred(struct pnfs_layout_segment *lseg, u32 ds_idx,
+ struct rpc_cred *mdscred)
+{
+ struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, ds_idx);
+ struct rpc_cred *cred = ERR_PTR(-EINVAL);
+
+ if (!nfs4_ff_layout_prepare_ds(lseg, ds_idx, true))
+ goto out;
+
+ if (mirror && mirror->cred)
+ cred = mirror->cred;
+ else
+ cred = mdscred;
+out:
+ return cred;
+}
+
+/**
+* Find or create a DS rpc client with th MDS server rpc client auth flavor
+* in the nfs_client cl_ds_clients list.
+*/
+struct rpc_clnt *
+nfs4_ff_find_or_create_ds_client(struct pnfs_layout_segment *lseg, u32 ds_idx,
+ struct nfs_client *ds_clp, struct inode *inode)
+{
+ struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, ds_idx);
+
+ switch (mirror->mirror_ds->ds_versions[0].version) {
+ case 3:
+ /* For NFSv3 DS, flavor is set when creating DS connections */
+ return ds_clp->cl_rpcclient;
+ case 4:
+ return nfs4_find_or_create_ds_client(ds_clp, inode);
+ default:
+ BUG();
+ }
+}
+
+static bool is_range_intersecting(u64 offset1, u64 length1,
+ u64 offset2, u64 length2)
+{
+ u64 end1 = end_offset(offset1, length1);
+ u64 end2 = end_offset(offset2, length2);
+
+ return (end1 == NFS4_MAX_UINT64 || end1 > offset2) &&
+ (end2 == NFS4_MAX_UINT64 || end2 > offset1);
+}
+
+/* called with inode i_lock held */
+int ff_layout_encode_ds_ioerr(struct nfs4_flexfile_layout *flo,
+ struct xdr_stream *xdr, int *count,
+ const struct pnfs_layout_range *range)
+{
+ struct nfs4_ff_layout_ds_err *err, *n;
+ __be32 *p;
+
+ list_for_each_entry_safe(err, n, &flo->error_list, list) {
+ if (!is_range_intersecting(err->offset, err->length,
+ range->offset, range->length))
+ continue;
+ /* offset(8) + length(8) + stateid(NFS4_STATEID_SIZE)
+ * + deviceid(NFS4_DEVICEID4_SIZE) + status(4) + opnum(4)
+ */
+ p = xdr_reserve_space(xdr,
+ 24 + NFS4_STATEID_SIZE + NFS4_DEVICEID4_SIZE);
+ if (unlikely(!p))
+ return -ENOBUFS;
+ p = xdr_encode_hyper(p, err->offset);
+ p = xdr_encode_hyper(p, err->length);
+ p = xdr_encode_opaque_fixed(p, &err->stateid,
+ NFS4_STATEID_SIZE);
+ p = xdr_encode_opaque_fixed(p, &err->deviceid,
+ NFS4_DEVICEID4_SIZE);
+ *p++ = cpu_to_be32(err->status);
+ *p++ = cpu_to_be32(err->opnum);
+ *count += 1;
+ list_del(&err->list);
+ kfree(err);
+ dprintk("%s: offset %llu length %llu status %d op %d count %d\n",
+ __func__, err->offset, err->length, err->status,
+ err->opnum, *count);
+ }
+
+ return 0;
+}
+
+bool ff_layout_has_available_ds(struct pnfs_layout_segment *lseg)
+{
+ struct nfs4_ff_layout_mirror *mirror;
+ struct nfs4_deviceid_node *devid;
+ int idx;
+
+ for (idx = 0; idx < FF_LAYOUT_MIRROR_COUNT(lseg); idx++) {
+ mirror = FF_LAYOUT_COMP(lseg, idx);
+ if (mirror && mirror->mirror_ds) {
+ devid = &mirror->mirror_ds->id_node;
+ if (!ff_layout_test_devid_unavailable(devid))
+ return true;
+ }
+ }
+
+ return false;
+}
+
+module_param(dataserver_retrans, uint, 0644);
+MODULE_PARM_DESC(dataserver_retrans, "The number of times the NFSv4.1 client "
+ "retries a request before it attempts further "
+ " recovery action.");
+module_param(dataserver_timeo, uint, 0644);
+MODULE_PARM_DESC(dataserver_timeo, "The time (in tenths of a second) the "
+ "NFSv4.1 client waits for a response from a "
+ " data server before it retries an NFS request.");
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index 2f5db84..857e2a9 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -152,7 +152,7 @@
nfs_fattr_free_group_name(fattr);
}
-static int nfs_map_string_to_numeric(const char *name, size_t namelen, __u32 *res)
+int nfs_map_string_to_numeric(const char *name, size_t namelen, __u32 *res)
{
unsigned long val;
char buf[16];
@@ -166,6 +166,7 @@
*res = val;
return 1;
}
+EXPORT_SYMBOL_GPL(nfs_map_string_to_numeric);
static int nfs_map_numeric_to_string(__u32 id, char *buf, size_t buflen)
{
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index b6f34bf..a98cf20 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -6,6 +6,7 @@
#include <linux/mount.h>
#include <linux/security.h>
#include <linux/crc32.h>
+#include <linux/nfs_page.h>
#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
@@ -187,9 +188,15 @@
const struct sockaddr *ds_addr,
int ds_addrlen, int ds_proto,
unsigned int ds_timeo,
- unsigned int ds_retrans);
+ unsigned int ds_retrans,
+ u32 minor_version,
+ rpc_authflavor_t au_flavor);
extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
struct inode *);
+extern struct nfs_client *nfs3_set_ds_client(struct nfs_client *mds_clp,
+ const struct sockaddr *ds_addr, int ds_addrlen,
+ int ds_proto, unsigned int ds_timeo,
+ unsigned int ds_retrans, rpc_authflavor_t au_flavor);
#ifdef CONFIG_PROC_FS
extern int __init nfs_fs_proc_init(void);
extern void nfs_fs_proc_exit(void);
@@ -242,9 +249,12 @@
void nfs_pgio_header_free(struct nfs_pgio_header *);
void nfs_pgio_data_destroy(struct nfs_pgio_header *);
int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
-int nfs_initiate_pgio(struct rpc_clnt *, struct nfs_pgio_header *,
- const struct rpc_call_ops *, int, int);
+int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
+ struct rpc_cred *cred, const struct nfs_rpc_ops *rpc_ops,
+ const struct rpc_call_ops *call_ops, int how, int flags);
void nfs_free_request(struct nfs_page *req);
+struct nfs_pgio_mirror *
+nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc);
static inline void nfs_iocounter_init(struct nfs_io_counter *c)
{
@@ -252,6 +262,12 @@
atomic_set(&c->io_count, 0);
}
+static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc)
+{
+ WARN_ON_ONCE(desc->pg_mirror_count < 1);
+ return desc->pg_mirror_count > 1;
+}
+
/* nfs2xdr.c */
extern struct rpc_procinfo nfs_procedures[];
extern int nfs2_decode_dirent(struct xdr_stream *,
@@ -427,6 +443,7 @@
extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
extern int nfs_initiate_commit(struct rpc_clnt *clnt,
struct nfs_commit_data *data,
+ const struct nfs_rpc_ops *nfs_ops,
const struct rpc_call_ops *call_ops,
int how, int flags);
extern void nfs_init_commit(struct nfs_commit_data *data,
@@ -440,13 +457,15 @@
struct nfs_commit_info *cinfo);
void nfs_mark_request_commit(struct nfs_page *req,
struct pnfs_layout_segment *lseg,
- struct nfs_commit_info *cinfo);
+ struct nfs_commit_info *cinfo,
+ u32 ds_commit_idx);
int nfs_write_need_commit(struct nfs_pgio_header *);
int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
int how, struct nfs_commit_info *cinfo);
void nfs_retry_commit(struct list_head *page_list,
struct pnfs_layout_segment *lseg,
- struct nfs_commit_info *cinfo);
+ struct nfs_commit_info *cinfo,
+ u32 ds_commit_idx);
void nfs_commitdata_release(struct nfs_commit_data *data);
void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst,
struct nfs_commit_info *cinfo);
@@ -457,6 +476,7 @@
struct nfs_direct_req *dreq);
int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx);
+void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio);
#ifdef CONFIG_MIGRATION
extern int nfs_migrate_page(struct address_space *,
@@ -480,6 +500,7 @@
inode_dio_wait(inode);
}
extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
+extern void nfs_direct_set_resched_writes(struct nfs_direct_req *dreq);
/* nfs4proc.c */
extern void __nfs4_read_done_cb(struct nfs_pgio_header *);
diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c
index 5f61b83..b4e03ed 100644
--- a/fs/nfs/nfs2xdr.c
+++ b/fs/nfs/nfs2xdr.c
@@ -481,7 +481,8 @@
* void;
* };
*/
-static int decode_attrstat(struct xdr_stream *xdr, struct nfs_fattr *result)
+static int decode_attrstat(struct xdr_stream *xdr, struct nfs_fattr *result,
+ __u32 *op_status)
{
enum nfs_stat status;
int error;
@@ -489,6 +490,8 @@
error = decode_stat(xdr, &status);
if (unlikely(error))
goto out;
+ if (op_status)
+ *op_status = status;
if (status != NFS_OK)
goto out_default;
error = decode_fattr(xdr, result);
@@ -808,7 +811,7 @@
static int nfs2_xdr_dec_attrstat(struct rpc_rqst *req, struct xdr_stream *xdr,
struct nfs_fattr *result)
{
- return decode_attrstat(xdr, result);
+ return decode_attrstat(xdr, result, NULL);
}
static int nfs2_xdr_dec_diropres(struct rpc_rqst *req, struct xdr_stream *xdr,
@@ -865,6 +868,7 @@
error = decode_stat(xdr, &status);
if (unlikely(error))
goto out;
+ result->op_status = status;
if (status != NFS_OK)
goto out_default;
error = decode_fattr(xdr, result->fattr);
@@ -882,7 +886,7 @@
{
/* All NFSv2 writes are "file sync" writes */
result->verf->committed = NFS_FILE_SYNC;
- return decode_attrstat(xdr, result->fattr);
+ return decode_attrstat(xdr, result->fattr, &result->op_status);
}
/**
diff --git a/fs/nfs/nfs3_fs.h b/fs/nfs/nfs3_fs.h
index 333ae40..e134d65 100644
--- a/fs/nfs/nfs3_fs.h
+++ b/fs/nfs/nfs3_fs.h
@@ -30,5 +30,7 @@
struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *,
struct nfs_fattr *, rpc_authflavor_t);
+/* nfs3super.c */
+extern struct nfs_subversion nfs_v3;
#endif /* __LINUX_FS_NFS_NFS3_FS_H */
diff --git a/fs/nfs/nfs3client.c b/fs/nfs/nfs3client.c
index 8c1b437..9e9fa34 100644
--- a/fs/nfs/nfs3client.c
+++ b/fs/nfs/nfs3client.c
@@ -1,5 +1,6 @@
#include <linux/nfs_fs.h>
#include <linux/nfs_mount.h>
+#include <linux/sunrpc/addr.h>
#include "internal.h"
#include "nfs3_fs.h"
@@ -64,3 +65,43 @@
nfs_init_server_aclclient(server);
return server;
}
+
+/*
+ * Set up a pNFS Data Server client over NFSv3.
+ *
+ * Return any existing nfs_client that matches server address,port,version
+ * and minorversion.
+ *
+ * For a new nfs_client, use a soft mount (default), a low retrans and a
+ * low timeout interval so that if a connection is lost, we retry through
+ * the MDS.
+ */
+struct nfs_client *nfs3_set_ds_client(struct nfs_client *mds_clp,
+ const struct sockaddr *ds_addr, int ds_addrlen,
+ int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans,
+ rpc_authflavor_t au_flavor)
+{
+ struct nfs_client_initdata cl_init = {
+ .addr = ds_addr,
+ .addrlen = ds_addrlen,
+ .nfs_mod = &nfs_v3,
+ .proto = ds_proto,
+ .net = mds_clp->cl_net,
+ };
+ struct rpc_timeout ds_timeout;
+ struct nfs_client *clp;
+ char buf[INET6_ADDRSTRLEN + 1];
+
+ /* fake a hostname because lockd wants it */
+ if (rpc_ntop(ds_addr, buf, sizeof(buf)) <= 0)
+ return ERR_PTR(-EINVAL);
+ cl_init.hostname = buf;
+
+ /* Use the MDS nfs_client cl_ipaddr. */
+ nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans);
+ clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
+ au_flavor);
+
+ return clp;
+}
+EXPORT_SYMBOL_GPL(nfs3_set_ds_client);
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 524f9f8..78e557c 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -800,6 +800,9 @@
{
struct inode *inode = hdr->inode;
+ if (hdr->pgio_done_cb != NULL)
+ return hdr->pgio_done_cb(task, hdr);
+
if (nfs3_async_handle_jukebox(task, inode))
return -EAGAIN;
@@ -825,6 +828,9 @@
{
struct inode *inode = hdr->inode;
+ if (hdr->pgio_done_cb != NULL)
+ return hdr->pgio_done_cb(task, hdr);
+
if (nfs3_async_handle_jukebox(task, inode))
return -EAGAIN;
if (task->tk_status >= 0)
@@ -845,6 +851,9 @@
static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
{
+ if (data->commit_done_cb != NULL)
+ return data->commit_done_cb(task, data);
+
if (nfs3_async_handle_jukebox(task, data->inode))
return -EAGAIN;
nfs_refresh_inode(data->inode, data->res.fattr);
diff --git a/fs/nfs/nfs3super.c b/fs/nfs/nfs3super.c
index 6af29c2..5c4394e 100644
--- a/fs/nfs/nfs3super.c
+++ b/fs/nfs/nfs3super.c
@@ -7,7 +7,7 @@
#include "nfs3_fs.h"
#include "nfs.h"
-static struct nfs_subversion nfs_v3 = {
+struct nfs_subversion nfs_v3 = {
.owner = THIS_MODULE,
.nfs_fs = &nfs_fs_type,
.rpc_vers = &nfs_version3,
diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c
index 8f4cbe7..2a932fd 100644
--- a/fs/nfs/nfs3xdr.c
+++ b/fs/nfs/nfs3xdr.c
@@ -1636,6 +1636,7 @@
error = decode_post_op_attr(xdr, result->fattr);
if (unlikely(error))
goto out;
+ result->op_status = status;
if (status != NFS3_OK)
goto out_status;
error = decode_read3resok(xdr, result);
@@ -1708,6 +1709,7 @@
error = decode_wcc_data(xdr, result->fattr);
if (unlikely(error))
goto out;
+ result->op_status = status;
if (status != NFS3_OK)
goto out_status;
error = decode_write3resok(xdr, result);
@@ -2323,6 +2325,7 @@
error = decode_wcc_data(xdr, result->fattr);
if (unlikely(error))
goto out;
+ result->op_status = status;
if (status != NFS3_OK)
goto out_status;
error = decode_writeverf3(xdr, &result->verf->verifier);
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index e57290a..fdef424 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -446,6 +446,12 @@
extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
extern void nfs_release_seqid(struct nfs_seqid *seqid);
extern void nfs_free_seqid(struct nfs_seqid *seqid);
+extern int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
+ struct nfs4_sequence_args *args,
+ struct nfs4_sequence_res *res,
+ struct rpc_task *task);
+extern int nfs4_sequence_done(struct rpc_task *task,
+ struct nfs4_sequence_res *res);
extern void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp);
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 706ad10..8646af9 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -849,14 +849,15 @@
*/
struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
const struct sockaddr *ds_addr, int ds_addrlen,
- int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans)
+ int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans,
+ u32 minor_version, rpc_authflavor_t au_flavor)
{
struct nfs_client_initdata cl_init = {
.addr = ds_addr,
.addrlen = ds_addrlen,
.nfs_mod = &nfs_v4,
.proto = ds_proto,
- .minorversion = mds_clp->cl_minorversion,
+ .minorversion = minor_version,
.net = mds_clp->cl_net,
};
struct rpc_timeout ds_timeout;
@@ -874,7 +875,7 @@
*/
nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans);
clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
- mds_clp->cl_rpcclient->cl_auth->au_flavor);
+ au_flavor);
dprintk("<-- %s %p\n", __func__, clp);
return clp;
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 0f75b92..6e1c9b2 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -495,12 +495,11 @@
args->sa_privileged = 1;
}
-static int nfs40_setup_sequence(const struct nfs_server *server,
- struct nfs4_sequence_args *args,
- struct nfs4_sequence_res *res,
- struct rpc_task *task)
+int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
+ struct nfs4_sequence_args *args,
+ struct nfs4_sequence_res *res,
+ struct rpc_task *task)
{
- struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
struct nfs4_slot *slot;
/* slot already allocated? */
@@ -535,6 +534,7 @@
spin_unlock(&tbl->slot_tbl_lock);
return -EAGAIN;
}
+EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
static int nfs40_sequence_done(struct rpc_task *task,
struct nfs4_sequence_res *res)
@@ -694,8 +694,7 @@
}
EXPORT_SYMBOL_GPL(nfs41_sequence_done);
-static int nfs4_sequence_done(struct rpc_task *task,
- struct nfs4_sequence_res *res)
+int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
{
if (res->sr_slot == NULL)
return 1;
@@ -703,6 +702,7 @@
return nfs40_sequence_done(task, res);
return nfs41_sequence_done(task, res);
}
+EXPORT_SYMBOL_GPL(nfs4_sequence_done);
int nfs41_setup_sequence(struct nfs4_session *session,
struct nfs4_sequence_args *args,
@@ -777,7 +777,8 @@
int ret = 0;
if (!session)
- return nfs40_setup_sequence(server, args, res, task);
+ return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
+ args, res, task);
dprintk("--> %s clp %p session %p sr_slot %u\n",
__func__, session->clp, session, res->sr_slot ?
@@ -818,14 +819,16 @@
struct nfs4_sequence_res *res,
struct rpc_task *task)
{
- return nfs40_setup_sequence(server, args, res, task);
+ return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
+ args, res, task);
}
-static int nfs4_sequence_done(struct rpc_task *task,
- struct nfs4_sequence_res *res)
+int nfs4_sequence_done(struct rpc_task *task,
+ struct nfs4_sequence_res *res)
{
return nfs40_sequence_done(task, res);
}
+EXPORT_SYMBOL_GPL(nfs4_sequence_done);
#endif /* !CONFIG_NFS_V4_1 */
@@ -1712,8 +1715,8 @@
{
struct nfs4_opendata *data = calldata;
- nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
- &data->c_res.seq_res, task);
+ nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
+ &data->c_arg.seq_args, &data->c_res.seq_res, task);
}
static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
@@ -5994,8 +5997,8 @@
{
struct nfs_release_lockowner_data *data = calldata;
struct nfs_server *server = data->server;
- nfs40_setup_sequence(server, &data->args.seq_args,
- &data->res.seq_res, task);
+ nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
+ &data->args.seq_args, &data->res.seq_res, task);
data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
data->timestamp = jiffies;
}
@@ -7557,6 +7560,7 @@
return;
if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
NFS_I(lgp->args.inode)->layout,
+ &lgp->args.range,
lgp->args.ctx->state)) {
rpc_exit(task, NFS4_OK);
}
@@ -7812,6 +7816,9 @@
spin_lock(&lo->plh_inode->i_lock);
if (lrp->res.lrs_present)
pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
+ pnfs_clear_layoutreturn_waitbit(lo);
+ clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
+ rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
lo->plh_block_lgets--;
spin_unlock(&lo->plh_inode->i_lock);
pnfs_put_layout_hdr(lrp->args.layout);
@@ -7825,7 +7832,7 @@
.rpc_release = nfs4_layoutreturn_release,
};
-int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
+int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
{
struct rpc_task *task;
struct rpc_message msg = {
@@ -7839,16 +7846,23 @@
.rpc_message = &msg,
.callback_ops = &nfs4_layoutreturn_call_ops,
.callback_data = lrp,
+ .flags = RPC_TASK_ASYNC,
};
- int status;
+ int status = 0;
dprintk("--> %s\n", __func__);
nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
task = rpc_run_task(&task_setup_data);
if (IS_ERR(task))
return PTR_ERR(task);
+ if (sync == false)
+ goto out;
+ status = nfs4_wait_for_completion_rpc_task(task);
+ if (status != 0)
+ goto out;
status = task->tk_status;
trace_nfs4_layoutreturn(lrp->args.inode, status);
+out:
dprintk("<-- %s status=%d\n", __func__, status);
rpc_put_task(task);
return status;
diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
index 6f340f0..48cea3c 100644
--- a/fs/nfs/nfs4super.c
+++ b/fs/nfs/nfs4super.c
@@ -346,6 +346,9 @@
static void __exit exit_nfs_v4(void)
{
+ /* Not called in the _init(), conditionally loaded */
+ nfs4_pnfs_v3_ds_connect_unload();
+
unregister_nfs_version(&nfs_v4);
nfs4_unregister_sysctl();
nfs_idmap_quit();
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 4125339..a2329d6 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -2011,11 +2011,11 @@
p = reserve_space(xdr, 16);
*p++ = cpu_to_be32(0); /* reclaim. always 0 for now */
*p++ = cpu_to_be32(args->layout_type);
- *p++ = cpu_to_be32(IOMODE_ANY);
+ *p++ = cpu_to_be32(args->range.iomode);
*p = cpu_to_be32(RETURN_FILE);
p = reserve_space(xdr, 16);
- p = xdr_encode_hyper(p, 0);
- p = xdr_encode_hyper(p, NFS4_MAX_UINT64);
+ p = xdr_encode_hyper(p, args->range.offset);
+ p = xdr_encode_hyper(p, args->range.length);
spin_lock(&args->inode->i_lock);
encode_nfs4_stateid(xdr, &args->stateid);
spin_unlock(&args->inode->i_lock);
@@ -6566,6 +6566,7 @@
int status;
status = decode_compound_hdr(xdr, &hdr);
+ res->op_status = hdr.status;
if (status)
goto out;
status = decode_sequence(xdr, &res->seq_res, rqstp);
@@ -6591,6 +6592,7 @@
int status;
status = decode_compound_hdr(xdr, &hdr);
+ res->op_status = hdr.status;
if (status)
goto out;
status = decode_sequence(xdr, &res->seq_res, rqstp);
@@ -6620,6 +6622,7 @@
int status;
status = decode_compound_hdr(xdr, &hdr);
+ res->op_status = hdr.status;
if (status)
goto out;
status = decode_sequence(xdr, &res->seq_res, rqstp);
diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c
index 9e5bc42..24e1d74 100644
--- a/fs/nfs/objlayout/objio_osd.c
+++ b/fs/nfs/objlayout/objio_osd.c
@@ -537,11 +537,12 @@
static size_t objio_pg_test(struct nfs_pageio_descriptor *pgio,
struct nfs_page *prev, struct nfs_page *req)
{
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(pgio);
unsigned int size;
size = pnfs_generic_pg_test(pgio, prev, req);
- if (!size || pgio->pg_count + req->wb_bytes >
+ if (!size || mirror->pg_count + req->wb_bytes >
(unsigned long)pgio->pg_layout_private)
return 0;
@@ -607,12 +608,14 @@
.pg_init = objio_init_read,
.pg_test = objio_pg_test,
.pg_doio = pnfs_generic_pg_readpages,
+ .pg_cleanup = pnfs_generic_pg_cleanup,
};
static const struct nfs_pageio_ops objio_pg_write_ops = {
.pg_init = objio_init_write,
.pg_test = objio_pg_test,
.pg_doio = pnfs_generic_pg_writepages,
+ .pg_cleanup = pnfs_generic_pg_cleanup,
};
static struct pnfs_layoutdriver_type objlayout_type = {
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 2b5e769..960c99f 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -42,21 +42,35 @@
return p->pagevec != NULL;
}
+struct nfs_pgio_mirror *
+nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc)
+{
+ return nfs_pgio_has_mirroring(desc) ?
+ &desc->pg_mirrors[desc->pg_mirror_idx] :
+ &desc->pg_mirrors[0];
+}
+EXPORT_SYMBOL_GPL(nfs_pgio_current_mirror);
+
void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr,
void (*release)(struct nfs_pgio_header *hdr))
{
- hdr->req = nfs_list_entry(desc->pg_list.next);
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
+
+
+ hdr->req = nfs_list_entry(mirror->pg_list.next);
hdr->inode = desc->pg_inode;
hdr->cred = hdr->req->wb_context->cred;
hdr->io_start = req_offset(hdr->req);
- hdr->good_bytes = desc->pg_count;
+ hdr->good_bytes = mirror->pg_count;
hdr->dreq = desc->pg_dreq;
hdr->layout_private = desc->pg_layout_private;
hdr->release = release;
hdr->completion_ops = desc->pg_completion_ops;
if (hdr->completion_ops->init_hdr)
hdr->completion_ops->init_hdr(hdr);
+
+ hdr->pgio_mirror_idx = desc->pg_mirror_idx;
}
EXPORT_SYMBOL_GPL(nfs_pgheader_init);
@@ -480,7 +494,10 @@
size_t nfs_generic_pg_test(struct nfs_pageio_descriptor *desc,
struct nfs_page *prev, struct nfs_page *req)
{
- if (desc->pg_count > desc->pg_bsize) {
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
+
+
+ if (mirror->pg_count > mirror->pg_bsize) {
/* should never happen */
WARN_ON_ONCE(1);
return 0;
@@ -490,11 +507,11 @@
* Limit the request size so that we can still allocate a page array
* for it without upsetting the slab allocator.
*/
- if (((desc->pg_count + req->wb_bytes) >> PAGE_SHIFT) *
+ if (((mirror->pg_count + req->wb_bytes) >> PAGE_SHIFT) *
sizeof(struct page) > PAGE_SIZE)
return 0;
- return min(desc->pg_bsize - desc->pg_count, (size_t)req->wb_bytes);
+ return min(mirror->pg_bsize - mirror->pg_count, (size_t)req->wb_bytes);
}
EXPORT_SYMBOL_GPL(nfs_generic_pg_test);
@@ -597,13 +614,14 @@
}
int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
+ struct rpc_cred *cred, const struct nfs_rpc_ops *rpc_ops,
const struct rpc_call_ops *call_ops, int how, int flags)
{
struct rpc_task *task;
struct rpc_message msg = {
.rpc_argp = &hdr->args,
.rpc_resp = &hdr->res,
- .rpc_cred = hdr->cred,
+ .rpc_cred = cred,
};
struct rpc_task_setup task_setup_data = {
.rpc_client = clnt,
@@ -616,7 +634,7 @@
};
int ret = 0;
- hdr->rw_ops->rw_initiate(hdr, &msg, &task_setup_data, how);
+ hdr->rw_ops->rw_initiate(hdr, &msg, rpc_ops, &task_setup_data, how);
dprintk("NFS: %5u initiated pgio call "
"(req %s/%llu, %u bytes @ offset %llu)\n",
@@ -650,10 +668,18 @@
static int nfs_pgio_error(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr)
{
+ struct nfs_pgio_mirror *mirror;
+ u32 midx;
+
set_bit(NFS_IOHDR_REDO, &hdr->flags);
nfs_pgio_data_destroy(hdr);
hdr->completion_ops->completion(hdr);
- desc->pg_completion_ops->error_cleanup(&desc->pg_list);
+ /* TODO: Make sure it's right to clean up all mirrors here
+ * and not just hdr->pgio_mirror_idx */
+ for (midx = 0; midx < desc->pg_mirror_count; midx++) {
+ mirror = &desc->pg_mirrors[midx];
+ desc->pg_completion_ops->error_cleanup(&mirror->pg_list);
+ }
return -ENOMEM;
}
@@ -670,6 +696,17 @@
hdr->completion_ops->completion(hdr);
}
+static void nfs_pageio_mirror_init(struct nfs_pgio_mirror *mirror,
+ unsigned int bsize)
+{
+ INIT_LIST_HEAD(&mirror->pg_list);
+ mirror->pg_bytes_written = 0;
+ mirror->pg_count = 0;
+ mirror->pg_bsize = bsize;
+ mirror->pg_base = 0;
+ mirror->pg_recoalesce = 0;
+}
+
/**
* nfs_pageio_init - initialise a page io descriptor
* @desc: pointer to descriptor
@@ -686,13 +723,10 @@
size_t bsize,
int io_flags)
{
- INIT_LIST_HEAD(&desc->pg_list);
- desc->pg_bytes_written = 0;
- desc->pg_count = 0;
- desc->pg_bsize = bsize;
- desc->pg_base = 0;
+ struct nfs_pgio_mirror *new;
+ int i;
+
desc->pg_moreio = 0;
- desc->pg_recoalesce = 0;
desc->pg_inode = inode;
desc->pg_ops = pg_ops;
desc->pg_completion_ops = compl_ops;
@@ -702,6 +736,26 @@
desc->pg_lseg = NULL;
desc->pg_dreq = NULL;
desc->pg_layout_private = NULL;
+ desc->pg_bsize = bsize;
+
+ desc->pg_mirror_count = 1;
+ desc->pg_mirror_idx = 0;
+
+ if (pg_ops->pg_get_mirror_count) {
+ /* until we have a request, we don't have an lseg and no
+ * idea how many mirrors there will be */
+ new = kcalloc(NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX,
+ sizeof(struct nfs_pgio_mirror), GFP_KERNEL);
+ desc->pg_mirrors_dynamic = new;
+ desc->pg_mirrors = new;
+
+ for (i = 0; i < NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX; i++)
+ nfs_pageio_mirror_init(&desc->pg_mirrors[i], bsize);
+ } else {
+ desc->pg_mirrors_dynamic = NULL;
+ desc->pg_mirrors = desc->pg_mirrors_static;
+ nfs_pageio_mirror_init(&desc->pg_mirrors[0], bsize);
+ }
}
EXPORT_SYMBOL_GPL(nfs_pageio_init);
@@ -737,14 +791,16 @@
int nfs_generic_pgio(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr)
{
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
+
struct nfs_page *req;
struct page **pages,
*last_page;
- struct list_head *head = &desc->pg_list;
+ struct list_head *head = &mirror->pg_list;
struct nfs_commit_info cinfo;
unsigned int pagecount, pageused;
- pagecount = nfs_page_array_len(desc->pg_base, desc->pg_count);
+ pagecount = nfs_page_array_len(mirror->pg_base, mirror->pg_count);
if (!nfs_pgarray_set(&hdr->page_array, pagecount))
return nfs_pgio_error(desc, hdr);
@@ -772,7 +828,7 @@
desc->pg_ioflags &= ~FLUSH_COND_STABLE;
/* Set up the argument struct */
- nfs_pgio_rpcsetup(hdr, desc->pg_count, 0, desc->pg_ioflags, &cinfo);
+ nfs_pgio_rpcsetup(hdr, mirror->pg_count, 0, desc->pg_ioflags, &cinfo);
desc->pg_rpc_callops = &nfs_pgio_common_ops;
return 0;
}
@@ -780,23 +836,74 @@
static int nfs_generic_pg_pgios(struct nfs_pageio_descriptor *desc)
{
+ struct nfs_pgio_mirror *mirror;
struct nfs_pgio_header *hdr;
int ret;
+ mirror = nfs_pgio_current_mirror(desc);
+
hdr = nfs_pgio_header_alloc(desc->pg_rw_ops);
if (!hdr) {
- desc->pg_completion_ops->error_cleanup(&desc->pg_list);
+ /* TODO: make sure this is right with mirroring - or
+ * should it back out all mirrors? */
+ desc->pg_completion_ops->error_cleanup(&mirror->pg_list);
return -ENOMEM;
}
nfs_pgheader_init(desc, hdr, nfs_pgio_header_free);
ret = nfs_generic_pgio(desc, hdr);
if (ret == 0)
ret = nfs_initiate_pgio(NFS_CLIENT(hdr->inode),
- hdr, desc->pg_rpc_callops,
+ hdr,
+ hdr->cred,
+ NFS_PROTO(hdr->inode),
+ desc->pg_rpc_callops,
desc->pg_ioflags, 0);
return ret;
}
+/*
+ * nfs_pageio_setup_mirroring - determine if mirroring is to be used
+ * by calling the pg_get_mirror_count op
+ */
+static int nfs_pageio_setup_mirroring(struct nfs_pageio_descriptor *pgio,
+ struct nfs_page *req)
+{
+ int mirror_count = 1;
+
+ if (!pgio->pg_ops->pg_get_mirror_count)
+ return 0;
+
+ mirror_count = pgio->pg_ops->pg_get_mirror_count(pgio, req);
+
+ if (!mirror_count || mirror_count > NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX)
+ return -EINVAL;
+
+ if (WARN_ON_ONCE(!pgio->pg_mirrors_dynamic))
+ return -EINVAL;
+
+ pgio->pg_mirror_count = mirror_count;
+
+ return 0;
+}
+
+/*
+ * nfs_pageio_stop_mirroring - stop using mirroring (set mirror count to 1)
+ */
+void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio)
+{
+ pgio->pg_mirror_count = 1;
+ pgio->pg_mirror_idx = 0;
+}
+
+static void nfs_pageio_cleanup_mirroring(struct nfs_pageio_descriptor *pgio)
+{
+ pgio->pg_mirror_count = 1;
+ pgio->pg_mirror_idx = 0;
+ pgio->pg_mirrors = pgio->pg_mirrors_static;
+ kfree(pgio->pg_mirrors_dynamic);
+ pgio->pg_mirrors_dynamic = NULL;
+}
+
static bool nfs_match_open_context(const struct nfs_open_context *ctx1,
const struct nfs_open_context *ctx2)
{
@@ -863,19 +970,22 @@
static int nfs_pageio_do_add_request(struct nfs_pageio_descriptor *desc,
struct nfs_page *req)
{
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
+
struct nfs_page *prev = NULL;
- if (desc->pg_count != 0) {
- prev = nfs_list_entry(desc->pg_list.prev);
+
+ if (mirror->pg_count != 0) {
+ prev = nfs_list_entry(mirror->pg_list.prev);
} else {
if (desc->pg_ops->pg_init)
desc->pg_ops->pg_init(desc, req);
- desc->pg_base = req->wb_pgbase;
+ mirror->pg_base = req->wb_pgbase;
}
if (!nfs_can_coalesce_requests(prev, req, desc))
return 0;
nfs_list_remove_request(req);
- nfs_list_add_request(req, &desc->pg_list);
- desc->pg_count += req->wb_bytes;
+ nfs_list_add_request(req, &mirror->pg_list);
+ mirror->pg_count += req->wb_bytes;
return 1;
}
@@ -884,16 +994,19 @@
*/
static void nfs_pageio_doio(struct nfs_pageio_descriptor *desc)
{
- if (!list_empty(&desc->pg_list)) {
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
+
+
+ if (!list_empty(&mirror->pg_list)) {
int error = desc->pg_ops->pg_doio(desc);
if (error < 0)
desc->pg_error = error;
else
- desc->pg_bytes_written += desc->pg_count;
+ mirror->pg_bytes_written += mirror->pg_count;
}
- if (list_empty(&desc->pg_list)) {
- desc->pg_count = 0;
- desc->pg_base = 0;
+ if (list_empty(&mirror->pg_list)) {
+ mirror->pg_count = 0;
+ mirror->pg_base = 0;
}
}
@@ -911,6 +1024,8 @@
static int __nfs_pageio_add_request(struct nfs_pageio_descriptor *desc,
struct nfs_page *req)
{
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
+
struct nfs_page *subreq;
unsigned int bytes_left = 0;
unsigned int offset, pgbase;
@@ -934,7 +1049,7 @@
nfs_pageio_doio(desc);
if (desc->pg_error < 0)
return 0;
- if (desc->pg_recoalesce)
+ if (mirror->pg_recoalesce)
return 0;
/* retry add_request for this subreq */
nfs_page_group_lock(req, false);
@@ -972,14 +1087,16 @@
static int nfs_do_recoalesce(struct nfs_pageio_descriptor *desc)
{
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
LIST_HEAD(head);
do {
- list_splice_init(&desc->pg_list, &head);
- desc->pg_bytes_written -= desc->pg_count;
- desc->pg_count = 0;
- desc->pg_base = 0;
- desc->pg_recoalesce = 0;
+ list_splice_init(&mirror->pg_list, &head);
+ mirror->pg_bytes_written -= mirror->pg_count;
+ mirror->pg_count = 0;
+ mirror->pg_base = 0;
+ mirror->pg_recoalesce = 0;
+
desc->pg_moreio = 0;
while (!list_empty(&head)) {
@@ -993,11 +1110,11 @@
return 0;
break;
}
- } while (desc->pg_recoalesce);
+ } while (mirror->pg_recoalesce);
return 1;
}
-int nfs_pageio_add_request(struct nfs_pageio_descriptor *desc,
+static int nfs_pageio_add_request_mirror(struct nfs_pageio_descriptor *desc,
struct nfs_page *req)
{
int ret;
@@ -1010,9 +1127,80 @@
break;
ret = nfs_do_recoalesce(desc);
} while (ret);
+
return ret;
}
+int nfs_pageio_add_request(struct nfs_pageio_descriptor *desc,
+ struct nfs_page *req)
+{
+ u32 midx;
+ unsigned int pgbase, offset, bytes;
+ struct nfs_page *dupreq, *lastreq;
+
+ pgbase = req->wb_pgbase;
+ offset = req->wb_offset;
+ bytes = req->wb_bytes;
+
+ nfs_pageio_setup_mirroring(desc, req);
+
+ for (midx = 0; midx < desc->pg_mirror_count; midx++) {
+ if (midx) {
+ nfs_page_group_lock(req, false);
+
+ /* find the last request */
+ for (lastreq = req->wb_head;
+ lastreq->wb_this_page != req->wb_head;
+ lastreq = lastreq->wb_this_page)
+ ;
+
+ dupreq = nfs_create_request(req->wb_context,
+ req->wb_page, lastreq, pgbase, bytes);
+
+ if (IS_ERR(dupreq)) {
+ nfs_page_group_unlock(req);
+ return 0;
+ }
+
+ nfs_lock_request(dupreq);
+ nfs_page_group_unlock(req);
+ dupreq->wb_offset = offset;
+ dupreq->wb_index = req->wb_index;
+ } else
+ dupreq = req;
+
+ if (nfs_pgio_has_mirroring(desc))
+ desc->pg_mirror_idx = midx;
+ if (!nfs_pageio_add_request_mirror(desc, dupreq))
+ return 0;
+ }
+
+ return 1;
+}
+
+/*
+ * nfs_pageio_complete_mirror - Complete I/O on the current mirror of an
+ * nfs_pageio_descriptor
+ * @desc: pointer to io descriptor
+ */
+static void nfs_pageio_complete_mirror(struct nfs_pageio_descriptor *desc,
+ u32 mirror_idx)
+{
+ struct nfs_pgio_mirror *mirror = &desc->pg_mirrors[mirror_idx];
+ u32 restore_idx = desc->pg_mirror_idx;
+
+ if (nfs_pgio_has_mirroring(desc))
+ desc->pg_mirror_idx = mirror_idx;
+ for (;;) {
+ nfs_pageio_doio(desc);
+ if (!mirror->pg_recoalesce)
+ break;
+ if (!nfs_do_recoalesce(desc))
+ break;
+ }
+ desc->pg_mirror_idx = restore_idx;
+}
+
/*
* nfs_pageio_resend - Transfer requests to new descriptor and resend
* @hdr - the pgio header to move request from
@@ -1046,18 +1234,19 @@
EXPORT_SYMBOL_GPL(nfs_pageio_resend);
/**
- * nfs_pageio_complete - Complete I/O on an nfs_pageio_descriptor
+ * nfs_pageio_complete - Complete I/O then cleanup an nfs_pageio_descriptor
* @desc: pointer to io descriptor
*/
void nfs_pageio_complete(struct nfs_pageio_descriptor *desc)
{
- for (;;) {
- nfs_pageio_doio(desc);
- if (!desc->pg_recoalesce)
- break;
- if (!nfs_do_recoalesce(desc))
- break;
- }
+ u32 midx;
+
+ for (midx = 0; midx < desc->pg_mirror_count; midx++)
+ nfs_pageio_complete_mirror(desc, midx);
+
+ if (desc->pg_ops->pg_cleanup)
+ desc->pg_ops->pg_cleanup(desc);
+ nfs_pageio_cleanup_mirroring(desc);
}
/**
@@ -1073,10 +1262,17 @@
*/
void nfs_pageio_cond_complete(struct nfs_pageio_descriptor *desc, pgoff_t index)
{
- if (!list_empty(&desc->pg_list)) {
- struct nfs_page *prev = nfs_list_entry(desc->pg_list.prev);
- if (index != prev->wb_index + 1)
- nfs_pageio_complete(desc);
+ struct nfs_pgio_mirror *mirror;
+ struct nfs_page *prev;
+ u32 midx;
+
+ for (midx = 0; midx < desc->pg_mirror_count; midx++) {
+ mirror = &desc->pg_mirrors[midx];
+ if (!list_empty(&mirror->pg_list)) {
+ prev = nfs_list_entry(mirror->pg_list.prev);
+ if (index != prev->wb_index + 1)
+ nfs_pageio_complete_mirror(desc, midx);
+ }
}
}
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 4d69076..703501d 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -51,6 +51,10 @@
*/
static LIST_HEAD(pnfs_modules_tbl);
+static int
+pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid,
+ enum pnfs_iomode iomode, bool sync);
+
/* Return the registered pnfs layout driver module matching given id */
static struct pnfs_layoutdriver_type *
find_pnfs_driver_locked(u32 id)
@@ -239,6 +243,8 @@
struct inode *inode = lo->plh_inode;
if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) {
+ if (!list_empty(&lo->plh_segs))
+ WARN_ONCE(1, "NFS: BUG unfreed layout segments.\n");
pnfs_detach_layout_hdr(lo);
spin_unlock(&inode->i_lock);
pnfs_free_layout_hdr(lo);
@@ -338,6 +344,65 @@
rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq);
}
+/* Return true if layoutreturn is needed */
+static bool
+pnfs_layout_need_return(struct pnfs_layout_hdr *lo,
+ struct pnfs_layout_segment *lseg)
+{
+ struct pnfs_layout_segment *s;
+
+ if (!test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags))
+ return false;
+
+ list_for_each_entry(s, &lo->plh_segs, pls_list)
+ if (s != lseg && test_bit(NFS_LSEG_LAYOUTRETURN, &s->pls_flags))
+ return false;
+
+ return true;
+}
+
+static void pnfs_layoutreturn_free_lseg(struct work_struct *work)
+{
+ struct pnfs_layout_segment *lseg;
+ struct pnfs_layout_hdr *lo;
+ struct inode *inode;
+
+ lseg = container_of(work, struct pnfs_layout_segment, pls_work);
+ WARN_ON(atomic_read(&lseg->pls_refcount));
+ lo = lseg->pls_layout;
+ inode = lo->plh_inode;
+
+ spin_lock(&inode->i_lock);
+ if (pnfs_layout_need_return(lo, lseg)) {
+ nfs4_stateid stateid;
+ enum pnfs_iomode iomode;
+
+ stateid = lo->plh_stateid;
+ iomode = lo->plh_return_iomode;
+ /* decreased in pnfs_send_layoutreturn() */
+ lo->plh_block_lgets++;
+ lo->plh_return_iomode = 0;
+ spin_unlock(&inode->i_lock);
+
+ pnfs_send_layoutreturn(lo, stateid, iomode, true);
+ spin_lock(&inode->i_lock);
+ } else
+ /* match pnfs_get_layout_hdr #2 in pnfs_put_lseg */
+ pnfs_put_layout_hdr(lo);
+ pnfs_layout_remove_lseg(lo, lseg);
+ spin_unlock(&inode->i_lock);
+ pnfs_free_lseg(lseg);
+ /* match pnfs_get_layout_hdr #1 in pnfs_put_lseg */
+ pnfs_put_layout_hdr(lo);
+}
+
+static void
+pnfs_layoutreturn_free_lseg_async(struct pnfs_layout_segment *lseg)
+{
+ INIT_WORK(&lseg->pls_work, pnfs_layoutreturn_free_lseg);
+ queue_work(nfsiod_workqueue, &lseg->pls_work);
+}
+
void
pnfs_put_lseg(struct pnfs_layout_segment *lseg)
{
@@ -354,10 +419,17 @@
inode = lo->plh_inode;
if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) {
pnfs_get_layout_hdr(lo);
- pnfs_layout_remove_lseg(lo, lseg);
- spin_unlock(&inode->i_lock);
- pnfs_free_lseg(lseg);
- pnfs_put_layout_hdr(lo);
+ if (pnfs_layout_need_return(lo, lseg)) {
+ spin_unlock(&inode->i_lock);
+ /* hdr reference dropped in nfs4_layoutreturn_release */
+ pnfs_get_layout_hdr(lo);
+ pnfs_layoutreturn_free_lseg_async(lseg);
+ } else {
+ pnfs_layout_remove_lseg(lo, lseg);
+ spin_unlock(&inode->i_lock);
+ pnfs_free_lseg(lseg);
+ pnfs_put_layout_hdr(lo);
+ }
}
}
EXPORT_SYMBOL_GPL(pnfs_put_lseg);
@@ -544,6 +616,7 @@
pnfs_get_layout_hdr(lo);
pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED);
pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED);
+ pnfs_clear_retry_layoutget(lo);
spin_unlock(&nfsi->vfs_inode.i_lock);
pnfs_free_lseg_list(&tmp_list);
pnfs_put_layout_hdr(lo);
@@ -741,25 +814,37 @@
return !pnfs_seqid_is_newer(seqid, lo->plh_barrier);
}
+static bool
+pnfs_layout_returning(const struct pnfs_layout_hdr *lo,
+ struct pnfs_layout_range *range)
+{
+ return test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags) &&
+ (lo->plh_return_iomode == IOMODE_ANY ||
+ lo->plh_return_iomode == range->iomode);
+}
+
/* lget is set to 1 if called from inside send_layoutget call chain */
static bool
-pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo, int lget)
+pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo,
+ struct pnfs_layout_range *range, int lget)
{
return lo->plh_block_lgets ||
test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) ||
(list_empty(&lo->plh_segs) &&
- (atomic_read(&lo->plh_outstanding) > lget));
+ (atomic_read(&lo->plh_outstanding) > lget)) ||
+ pnfs_layout_returning(lo, range);
}
int
pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo,
+ struct pnfs_layout_range *range,
struct nfs4_state *open_state)
{
int status = 0;
dprintk("--> %s\n", __func__);
spin_lock(&lo->plh_inode->i_lock);
- if (pnfs_layoutgets_blocked(lo, 1)) {
+ if (pnfs_layoutgets_blocked(lo, range, 1)) {
status = -EAGAIN;
} else if (!nfs4_valid_open_stateid(open_state)) {
status = -EBADF;
@@ -826,7 +911,9 @@
pnfs_layout_io_set_failed(lo, range->iomode);
}
return NULL;
- }
+ } else
+ pnfs_layout_clear_fail_bit(lo,
+ pnfs_iomode_to_fail_bit(range->iomode));
return lseg;
}
@@ -846,6 +933,49 @@
}
}
+void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo)
+{
+ clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags);
+ smp_mb__after_atomic();
+ wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN);
+}
+
+static int
+pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid,
+ enum pnfs_iomode iomode, bool sync)
+{
+ struct inode *ino = lo->plh_inode;
+ struct nfs4_layoutreturn *lrp;
+ int status = 0;
+
+ lrp = kzalloc(sizeof(*lrp), GFP_KERNEL);
+ if (unlikely(lrp == NULL)) {
+ status = -ENOMEM;
+ spin_lock(&ino->i_lock);
+ lo->plh_block_lgets--;
+ pnfs_clear_layoutreturn_waitbit(lo);
+ rpc_wake_up(&NFS_SERVER(ino)->roc_rpcwaitq);
+ spin_unlock(&ino->i_lock);
+ pnfs_put_layout_hdr(lo);
+ goto out;
+ }
+
+ lrp->args.stateid = stateid;
+ lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id;
+ lrp->args.inode = ino;
+ lrp->args.range.iomode = iomode;
+ lrp->args.range.offset = 0;
+ lrp->args.range.length = NFS4_MAX_UINT64;
+ lrp->args.layout = lo;
+ lrp->clp = NFS_SERVER(ino)->nfs_client;
+ lrp->cred = lo->plh_lc_cred;
+
+ status = nfs4_proc_layoutreturn(lrp, sync);
+out:
+ dprintk("<-- %s status: %d\n", __func__, status);
+ return status;
+}
+
/*
* Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr
* when the layout segment list is empty.
@@ -860,7 +990,6 @@
struct pnfs_layout_hdr *lo = NULL;
struct nfs_inode *nfsi = NFS_I(ino);
LIST_HEAD(tmp_list);
- struct nfs4_layoutreturn *lrp;
nfs4_stateid stateid;
int status = 0, empty;
@@ -902,24 +1031,7 @@
spin_unlock(&ino->i_lock);
pnfs_free_lseg_list(&tmp_list);
- lrp = kzalloc(sizeof(*lrp), GFP_KERNEL);
- if (unlikely(lrp == NULL)) {
- status = -ENOMEM;
- spin_lock(&ino->i_lock);
- lo->plh_block_lgets--;
- spin_unlock(&ino->i_lock);
- pnfs_put_layout_hdr(lo);
- goto out;
- }
-
- lrp->args.stateid = stateid;
- lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id;
- lrp->args.inode = ino;
- lrp->args.layout = lo;
- lrp->clp = NFS_SERVER(ino)->nfs_client;
- lrp->cred = lo->plh_lc_cred;
-
- status = nfs4_proc_layoutreturn(lrp);
+ status = pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, true);
out:
dprintk("<-- %s status: %d\n", __func__, status);
return status;
@@ -960,8 +1072,9 @@
struct nfs4_state *state;
struct pnfs_layout_hdr *lo;
struct pnfs_layout_segment *lseg, *tmp;
+ nfs4_stateid stateid;
LIST_HEAD(tmp_list);
- bool found = false;
+ bool found = false, layoutreturn = false;
spin_lock(&ino->i_lock);
lo = nfsi->layout;
@@ -980,6 +1093,8 @@
goto out_noroc;
}
+ goto out_noroc;
+ pnfs_clear_retry_layoutget(lo);
list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list)
if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) {
mark_lseg_invalid(lseg, &tmp_list);
@@ -994,7 +1109,19 @@
return true;
out_noroc:
+ if (lo) {
+ stateid = lo->plh_stateid;
+ layoutreturn =
+ test_and_clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
+ &lo->plh_flags);
+ if (layoutreturn) {
+ lo->plh_block_lgets++;
+ pnfs_get_layout_hdr(lo);
+ }
+ }
spin_unlock(&ino->i_lock);
+ if (layoutreturn)
+ pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, true);
return false;
}
@@ -1029,8 +1156,9 @@
struct nfs_inode *nfsi = NFS_I(ino);
struct pnfs_layout_hdr *lo;
struct pnfs_layout_segment *lseg;
+ nfs4_stateid stateid;
u32 current_seqid;
- bool found = false;
+ bool found = false, layoutreturn = false;
spin_lock(&ino->i_lock);
list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list)
@@ -1047,7 +1175,21 @@
*/
*barrier = current_seqid + atomic_read(&lo->plh_outstanding);
out:
+ if (!found) {
+ stateid = lo->plh_stateid;
+ layoutreturn =
+ test_and_clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
+ &lo->plh_flags);
+ if (layoutreturn) {
+ lo->plh_block_lgets++;
+ pnfs_get_layout_hdr(lo);
+ }
+ }
spin_unlock(&ino->i_lock);
+ if (layoutreturn) {
+ rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL);
+ pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, false);
+ }
return found;
}
@@ -1194,6 +1336,7 @@
list_for_each_entry(lseg, &lo->plh_segs, pls_list) {
if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) &&
+ !test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags) &&
pnfs_lseg_range_match(&lseg->pls_range, range)) {
ret = pnfs_get_lseg(lseg);
break;
@@ -1282,6 +1425,35 @@
return ret;
}
+/* stop waiting if someone clears NFS_LAYOUT_RETRY_LAYOUTGET bit. */
+static int pnfs_layoutget_retry_bit_wait(struct wait_bit_key *key)
+{
+ if (!test_bit(NFS_LAYOUT_RETRY_LAYOUTGET, key->flags))
+ return 1;
+ return nfs_wait_bit_killable(key);
+}
+
+static bool pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo)
+{
+ /*
+ * send layoutcommit as it can hold up layoutreturn due to lseg
+ * reference
+ */
+ pnfs_layoutcommit_inode(lo->plh_inode, false);
+ return !wait_on_bit_action(&lo->plh_flags, NFS_LAYOUT_RETURN,
+ pnfs_layoutget_retry_bit_wait,
+ TASK_UNINTERRUPTIBLE);
+}
+
+static void pnfs_clear_first_layoutget(struct pnfs_layout_hdr *lo)
+{
+ unsigned long *bitlock = &lo->plh_flags;
+
+ clear_bit_unlock(NFS_LAYOUT_FIRST_LAYOUTGET, bitlock);
+ smp_mb__after_atomic();
+ wake_up_bit(bitlock, NFS_LAYOUT_FIRST_LAYOUTGET);
+}
+
/*
* Layout segment is retreived from the server if not cached.
* The appropriate layout segment is referenced and returned to the caller.
@@ -1312,6 +1484,8 @@
if (pnfs_within_mdsthreshold(ctx, ino, iomode))
goto out;
+lookup_again:
+ first = false;
spin_lock(&ino->i_lock);
lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags);
if (lo == NULL) {
@@ -1326,27 +1500,62 @@
}
/* if LAYOUTGET already failed once we don't try again */
- if (pnfs_layout_io_test_failed(lo, iomode))
+ if (pnfs_layout_io_test_failed(lo, iomode) &&
+ !pnfs_should_retry_layoutget(lo))
goto out_unlock;
- /* Check to see if the layout for the given range already exists */
- lseg = pnfs_find_lseg(lo, &arg);
- if (lseg)
- goto out_unlock;
+ first = list_empty(&lo->plh_segs);
+ if (first) {
+ /* The first layoutget for the file. Need to serialize per
+ * RFC 5661 Errata 3208.
+ */
+ if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET,
+ &lo->plh_flags)) {
+ spin_unlock(&ino->i_lock);
+ wait_on_bit(&lo->plh_flags, NFS_LAYOUT_FIRST_LAYOUTGET,
+ TASK_UNINTERRUPTIBLE);
+ pnfs_put_layout_hdr(lo);
+ goto lookup_again;
+ }
+ } else {
+ /* Check to see if the layout for the given range
+ * already exists
+ */
+ lseg = pnfs_find_lseg(lo, &arg);
+ if (lseg)
+ goto out_unlock;
+ }
- if (pnfs_layoutgets_blocked(lo, 0))
+ /*
+ * Because we free lsegs before sending LAYOUTRETURN, we need to wait
+ * for LAYOUTRETURN even if first is true.
+ */
+ if (!lseg && pnfs_should_retry_layoutget(lo) &&
+ test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) {
+ spin_unlock(&ino->i_lock);
+ dprintk("%s wait for layoutreturn\n", __func__);
+ if (pnfs_prepare_to_retry_layoutget(lo)) {
+ if (first)
+ pnfs_clear_first_layoutget(lo);
+ pnfs_put_layout_hdr(lo);
+ dprintk("%s retrying\n", __func__);
+ goto lookup_again;
+ }
+ goto out_put_layout_hdr;
+ }
+
+ if (pnfs_layoutgets_blocked(lo, &arg, 0))
goto out_unlock;
atomic_inc(&lo->plh_outstanding);
-
- first = list_empty(&lo->plh_layouts) ? true : false;
spin_unlock(&ino->i_lock);
- if (first) {
+ if (list_empty(&lo->plh_layouts)) {
/* The lo must be on the clp list if there is any
* chance of a CB_LAYOUTRECALL(FILE) coming in.
*/
spin_lock(&clp->cl_lock);
- list_add_tail(&lo->plh_layouts, &server->layouts);
+ if (list_empty(&lo->plh_layouts))
+ list_add_tail(&lo->plh_layouts, &server->layouts);
spin_unlock(&clp->cl_lock);
}
@@ -1359,8 +1568,11 @@
arg.length = PAGE_CACHE_ALIGN(arg.length);
lseg = send_layoutget(lo, ctx, &arg, gfp_flags);
+ pnfs_clear_retry_layoutget(lo);
atomic_dec(&lo->plh_outstanding);
out_put_layout_hdr:
+ if (first)
+ pnfs_clear_first_layoutget(lo);
pnfs_put_layout_hdr(lo);
out:
dprintk("%s: inode %s/%llu pNFS layout segment %s for "
@@ -1409,7 +1621,7 @@
goto out_forget_reply;
}
- if (pnfs_layoutgets_blocked(lo, 1)) {
+ if (pnfs_layoutgets_blocked(lo, &lgp->args.range, 1)) {
dprintk("%s forget reply due to state\n", __func__);
goto out_forget_reply;
}
@@ -1456,24 +1668,79 @@
goto out;
}
+static void
+pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
+ struct list_head *tmp_list,
+ struct pnfs_layout_range *return_range)
+{
+ struct pnfs_layout_segment *lseg, *next;
+
+ dprintk("%s:Begin lo %p\n", __func__, lo);
+
+ if (list_empty(&lo->plh_segs))
+ return;
+
+ list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list)
+ if (should_free_lseg(&lseg->pls_range, return_range)) {
+ dprintk("%s: marking lseg %p iomode %d "
+ "offset %llu length %llu\n", __func__,
+ lseg, lseg->pls_range.iomode,
+ lseg->pls_range.offset,
+ lseg->pls_range.length);
+ set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags);
+ mark_lseg_invalid(lseg, tmp_list);
+ }
+}
+
+void pnfs_error_mark_layout_for_return(struct inode *inode,
+ struct pnfs_layout_segment *lseg)
+{
+ struct pnfs_layout_hdr *lo = NFS_I(inode)->layout;
+ int iomode = pnfs_iomode_to_fail_bit(lseg->pls_range.iomode);
+ struct pnfs_layout_range range = {
+ .iomode = lseg->pls_range.iomode,
+ .offset = 0,
+ .length = NFS4_MAX_UINT64,
+ };
+ LIST_HEAD(free_me);
+
+ spin_lock(&inode->i_lock);
+ /* set failure bit so that pnfs path will be retried later */
+ pnfs_layout_set_fail_bit(lo, iomode);
+ set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags);
+ if (lo->plh_return_iomode == 0)
+ lo->plh_return_iomode = range.iomode;
+ else if (lo->plh_return_iomode != range.iomode)
+ lo->plh_return_iomode = IOMODE_ANY;
+ /*
+ * mark all matching lsegs so that we are sure to have no live
+ * segments at hand when sending layoutreturn. See pnfs_put_lseg()
+ * for how it works.
+ */
+ pnfs_mark_matching_lsegs_return(lo, &free_me, &range);
+ spin_unlock(&inode->i_lock);
+ pnfs_free_lseg_list(&free_me);
+}
+EXPORT_SYMBOL_GPL(pnfs_error_mark_layout_for_return);
+
void
pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
{
u64 rd_size = req->wb_bytes;
- WARN_ON_ONCE(pgio->pg_lseg != NULL);
+ if (pgio->pg_lseg == NULL) {
+ if (pgio->pg_dreq == NULL)
+ rd_size = i_size_read(pgio->pg_inode) - req_offset(req);
+ else
+ rd_size = nfs_dreq_bytes_left(pgio->pg_dreq);
- if (pgio->pg_dreq == NULL)
- rd_size = i_size_read(pgio->pg_inode) - req_offset(req);
- else
- rd_size = nfs_dreq_bytes_left(pgio->pg_dreq);
-
- pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
- req->wb_context,
- req_offset(req),
- rd_size,
- IOMODE_READ,
- GFP_KERNEL);
+ pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
+ req->wb_context,
+ req_offset(req),
+ rd_size,
+ IOMODE_READ,
+ GFP_KERNEL);
+ }
/* If no lseg, fall back to read through mds */
if (pgio->pg_lseg == NULL)
nfs_pageio_reset_read_mds(pgio);
@@ -1485,27 +1752,36 @@
pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req, u64 wb_size)
{
- WARN_ON_ONCE(pgio->pg_lseg != NULL);
-
- pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
- req->wb_context,
- req_offset(req),
- wb_size,
- IOMODE_RW,
- GFP_NOFS);
+ if (pgio->pg_lseg == NULL)
+ pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
+ req->wb_context,
+ req_offset(req),
+ wb_size,
+ IOMODE_RW,
+ GFP_NOFS);
/* If no lseg, fall back to write through mds */
if (pgio->pg_lseg == NULL)
nfs_pageio_reset_write_mds(pgio);
}
EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write);
+void
+pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *desc)
+{
+ if (desc->pg_lseg) {
+ pnfs_put_lseg(desc->pg_lseg);
+ desc->pg_lseg = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(pnfs_generic_pg_cleanup);
+
/*
* Return 0 if @req cannot be coalesced into @pgio, otherwise return the number
* of bytes (maximum @req->wb_bytes) that can be coalesced.
*/
size_t
-pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
- struct nfs_page *req)
+pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
+ struct nfs_page *prev, struct nfs_page *req)
{
unsigned int size;
u64 seg_end, req_start, seg_left;
@@ -1529,10 +1805,16 @@
seg_end = end_offset(pgio->pg_lseg->pls_range.offset,
pgio->pg_lseg->pls_range.length);
req_start = req_offset(req);
- WARN_ON_ONCE(req_start > seg_end);
+ WARN_ON_ONCE(req_start >= seg_end);
/* start of request is past the last byte of this segment */
- if (req_start >= seg_end)
+ if (req_start >= seg_end) {
+ /* reference the new lseg */
+ if (pgio->pg_ops->pg_cleanup)
+ pgio->pg_ops->pg_cleanup(pgio);
+ if (pgio->pg_ops->pg_init)
+ pgio->pg_ops->pg_init(pgio, req);
return 0;
+ }
/* adjust 'size' iff there are fewer bytes left in the
* segment than what nfs_generic_pg_test returned */
@@ -1587,10 +1869,12 @@
pnfs_write_through_mds(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr)
{
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
+
if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
- list_splice_tail_init(&hdr->pages, &desc->pg_list);
+ list_splice_tail_init(&hdr->pages, &mirror->pg_list);
nfs_pageio_reset_write_mds(desc);
- desc->pg_recoalesce = 1;
+ mirror->pg_recoalesce = 1;
}
nfs_pgio_data_destroy(hdr);
}
@@ -1624,11 +1908,9 @@
struct pnfs_layout_segment *lseg = desc->pg_lseg;
enum pnfs_try_status trypnfs;
- desc->pg_lseg = NULL;
trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how);
if (trypnfs == PNFS_NOT_ATTEMPTED)
pnfs_write_through_mds(desc, hdr);
- pnfs_put_lseg(lseg);
}
static void pnfs_writehdr_free(struct nfs_pgio_header *hdr)
@@ -1641,24 +1923,23 @@
int
pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc)
{
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
+
struct nfs_pgio_header *hdr;
int ret;
hdr = nfs_pgio_header_alloc(desc->pg_rw_ops);
if (!hdr) {
- desc->pg_completion_ops->error_cleanup(&desc->pg_list);
- pnfs_put_lseg(desc->pg_lseg);
- desc->pg_lseg = NULL;
+ desc->pg_completion_ops->error_cleanup(&mirror->pg_list);
return -ENOMEM;
}
nfs_pgheader_init(desc, hdr, pnfs_writehdr_free);
+
hdr->lseg = pnfs_get_lseg(desc->pg_lseg);
ret = nfs_generic_pgio(desc, hdr);
- if (ret != 0) {
- pnfs_put_lseg(desc->pg_lseg);
- desc->pg_lseg = NULL;
- } else
+ if (!ret)
pnfs_do_write(desc, hdr, desc->pg_ioflags);
+
return ret;
}
EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages);
@@ -1703,10 +1984,12 @@
pnfs_read_through_mds(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr)
{
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
+
if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
- list_splice_tail_init(&hdr->pages, &desc->pg_list);
+ list_splice_tail_init(&hdr->pages, &mirror->pg_list);
nfs_pageio_reset_read_mds(desc);
- desc->pg_recoalesce = 1;
+ mirror->pg_recoalesce = 1;
}
nfs_pgio_data_destroy(hdr);
}
@@ -1735,18 +2018,29 @@
return trypnfs;
}
+/* Resend all requests through pnfs. */
+int pnfs_read_resend_pnfs(struct nfs_pgio_header *hdr)
+{
+ struct nfs_pageio_descriptor pgio;
+
+ nfs_pageio_init_read(&pgio, hdr->inode, false, hdr->completion_ops);
+ return nfs_pageio_resend(&pgio, hdr);
+}
+EXPORT_SYMBOL_GPL(pnfs_read_resend_pnfs);
+
static void
pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr)
{
const struct rpc_call_ops *call_ops = desc->pg_rpc_callops;
struct pnfs_layout_segment *lseg = desc->pg_lseg;
enum pnfs_try_status trypnfs;
+ int err = 0;
- desc->pg_lseg = NULL;
trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg);
- if (trypnfs == PNFS_NOT_ATTEMPTED)
+ if (trypnfs == PNFS_TRY_AGAIN)
+ err = pnfs_read_resend_pnfs(hdr);
+ if (trypnfs == PNFS_NOT_ATTEMPTED || err)
pnfs_read_through_mds(desc, hdr);
- pnfs_put_lseg(lseg);
}
static void pnfs_readhdr_free(struct nfs_pgio_header *hdr)
@@ -1759,24 +2053,20 @@
int
pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc)
{
+ struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
+
struct nfs_pgio_header *hdr;
int ret;
hdr = nfs_pgio_header_alloc(desc->pg_rw_ops);
if (!hdr) {
- desc->pg_completion_ops->error_cleanup(&desc->pg_list);
- ret = -ENOMEM;
- pnfs_put_lseg(desc->pg_lseg);
- desc->pg_lseg = NULL;
- return ret;
+ desc->pg_completion_ops->error_cleanup(&mirror->pg_list);
+ return -ENOMEM;
}
nfs_pgheader_init(desc, hdr, pnfs_readhdr_free);
hdr->lseg = pnfs_get_lseg(desc->pg_lseg);
ret = nfs_generic_pgio(desc, hdr);
- if (ret != 0) {
- pnfs_put_lseg(desc->pg_lseg);
- desc->pg_lseg = NULL;
- } else
+ if (!ret)
pnfs_do_read(desc, hdr);
return ret;
}
@@ -1982,6 +2272,7 @@
pnfs_clear_layoutcommitting(inode);
goto out;
}
+EXPORT_SYMBOL_GPL(pnfs_layoutcommit_inode);
struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
{
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index a98d8fd..797cd62 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -38,6 +38,25 @@
NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */
NFS_LSEG_ROC, /* roc bit received from server */
NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */
+ NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */
+};
+
+/* Individual ip address */
+struct nfs4_pnfs_ds_addr {
+ struct sockaddr_storage da_addr;
+ size_t da_addrlen;
+ struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */
+ char *da_remotestr; /* human readable addr+port */
+};
+
+struct nfs4_pnfs_ds {
+ struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */
+ char *ds_remotestr; /* comma sep list of addrs */
+ struct list_head ds_addrs;
+ struct nfs_client *ds_clp;
+ atomic_t ds_count;
+ unsigned long ds_state;
+#define NFS4DS_CONNECTING 0 /* ds is establishing connection */
};
struct pnfs_layout_segment {
@@ -53,19 +72,34 @@
enum pnfs_try_status {
PNFS_ATTEMPTED = 0,
PNFS_NOT_ATTEMPTED = 1,
+ PNFS_TRY_AGAIN = 2,
};
#ifdef CONFIG_NFS_V4_1
#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
+/*
+ * Default data server connection timeout and retrans vaules.
+ * Set by module parameters dataserver_timeo and dataserver_retrans.
+ */
+#define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */
+#define NFS4_DEF_DS_RETRANS 5
+
+/* error codes for internal use */
+#define NFS4ERR_RESET_TO_MDS 12001
+#define NFS4ERR_RESET_TO_PNFS 12002
+
enum {
NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
NFS_LAYOUT_ROC, /* some lseg had roc bit set */
NFS_LAYOUT_RETURN, /* Return this layout ASAP */
+ NFS_LAYOUT_RETURN_BEFORE_CLOSE, /* Return this layout before close */
NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */
+ NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */
+ NFS_LAYOUT_RETRY_LAYOUTGET, /* Retry layoutget */
};
enum layoutdriver_policy_flags {
@@ -106,7 +140,8 @@
struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
void (*mark_request_commit) (struct nfs_page *req,
struct pnfs_layout_segment *lseg,
- struct nfs_commit_info *cinfo);
+ struct nfs_commit_info *cinfo,
+ u32 ds_commit_idx);
void (*clear_request_commit) (struct nfs_page *req,
struct nfs_commit_info *cinfo);
int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
@@ -154,6 +189,7 @@
u32 plh_barrier; /* ignore lower seqids */
unsigned long plh_retry_timestamp;
unsigned long plh_flags;
+ enum pnfs_iomode plh_return_iomode;
loff_t plh_lwb; /* last write byte for layoutcommit */
struct rpc_cred *plh_lc_cred; /* layoutcommit cred */
struct inode *plh_inode;
@@ -185,7 +221,7 @@
struct pnfs_device *dev,
struct rpc_cred *cred);
extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags);
-extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp);
+extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync);
/* pnfs.c */
void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
@@ -198,6 +234,7 @@
int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req, u64 wb_size);
+void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *);
int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
struct nfs_page *prev, struct nfs_page *req);
@@ -217,6 +254,7 @@
bool update_barrier);
int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
struct pnfs_layout_hdr *lo,
+ struct pnfs_layout_range *range,
struct nfs4_state *open_state);
int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
struct list_head *tmp_list,
@@ -233,17 +271,21 @@
int pnfs_commit_and_return_layout(struct inode *);
void pnfs_ld_write_done(struct nfs_pgio_header *);
void pnfs_ld_read_done(struct nfs_pgio_header *);
+int pnfs_read_resend_pnfs(struct nfs_pgio_header *);
struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
struct nfs_open_context *ctx,
loff_t pos,
u64 count,
enum pnfs_iomode iomode,
gfp_t gfp_flags);
+void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo);
void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *);
int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *);
struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
+void pnfs_error_mark_layout_for_return(struct inode *inode,
+ struct pnfs_layout_segment *lseg);
/* nfs4_deviceid_flags */
enum {
@@ -275,6 +317,34 @@
bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
void nfs4_deviceid_purge_client(const struct nfs_client *);
+/* pnfs_nfs.c */
+void pnfs_generic_clear_request_commit(struct nfs_page *req,
+ struct nfs_commit_info *cinfo);
+void pnfs_generic_commit_release(void *calldata);
+void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data);
+void pnfs_generic_rw_release(void *data);
+void pnfs_generic_recover_commit_reqs(struct list_head *dst,
+ struct nfs_commit_info *cinfo);
+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));
+int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max);
+void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
+void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
+struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
+ gfp_t gfp_flags);
+void nfs4_pnfs_v3_ds_connect_unload(void);
+void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
+ struct nfs4_deviceid_node *devid, unsigned int timeo,
+ unsigned int retrans, u32 version, u32 minor_version,
+ rpc_authflavor_t au_flavor);
+struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
+ struct xdr_stream *xdr,
+ gfp_t gfp_flags);
+
static inline bool nfs_have_layout(struct inode *inode)
{
return NFS_I(inode)->layout != NULL;
@@ -287,6 +357,26 @@
return d;
}
+static inline void pnfs_set_retry_layoutget(struct pnfs_layout_hdr *lo)
+{
+ if (!test_and_set_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags))
+ atomic_inc(&lo->plh_refcount);
+}
+
+static inline void pnfs_clear_retry_layoutget(struct pnfs_layout_hdr *lo)
+{
+ if (test_and_clear_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) {
+ atomic_dec(&lo->plh_refcount);
+ /* wake up waiters for LAYOUTRETURN as that is not needed */
+ wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN);
+ }
+}
+
+static inline bool pnfs_should_retry_layoutget(struct pnfs_layout_hdr *lo)
+{
+ return test_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags);
+}
+
static inline struct pnfs_layout_segment *
pnfs_get_lseg(struct pnfs_layout_segment *lseg)
{
@@ -322,16 +412,22 @@
return ld->get_ds_info(inode);
}
+static inline void
+pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node)
+{
+ set_bit(NFS_DEVICEID_INVALID, &node->flags);
+}
+
static inline bool
pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
- struct nfs_commit_info *cinfo)
+ struct nfs_commit_info *cinfo, u32 ds_commit_idx)
{
struct inode *inode = req->wb_context->dentry->d_inode;
struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
if (lseg == NULL || ld->mark_request_commit == NULL)
return false;
- ld->mark_request_commit(req, lseg, cinfo);
+ ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx);
return true;
}
@@ -357,15 +453,6 @@
return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max);
}
-static inline void
-pnfs_recover_commit_reqs(struct inode *inode, struct list_head *list,
- struct nfs_commit_info *cinfo)
-{
- if (cinfo->ds == NULL || cinfo->ds->nwritten == 0)
- return;
- NFS_SERVER(inode)->pnfs_curr_ld->recover_commit_reqs(list, cinfo);
-}
-
static inline struct nfs_page *
pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
struct page *page)
@@ -523,7 +610,7 @@
static inline bool
pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
- struct nfs_commit_info *cinfo)
+ struct nfs_commit_info *cinfo, u32 ds_commit_idx)
{
return false;
}
@@ -541,12 +628,6 @@
return 0;
}
-static inline void
-pnfs_recover_commit_reqs(struct inode *inode, struct list_head *list,
- struct nfs_commit_info *cinfo)
-{
-}
-
static inline struct nfs_page *
pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
struct page *page)
@@ -578,6 +659,10 @@
return NULL;
}
+static inline void nfs4_pnfs_v3_ds_connect_unload(void)
+{
+}
+
#endif /* CONFIG_NFS_V4_1 */
#endif /* FS_NFS_PNFS_H */
diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c
new file mode 100644
index 0000000..fdc4f65
--- /dev/null
+++ b/fs/nfs/pnfs_nfs.c
@@ -0,0 +1,840 @@
+/*
+ * 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 <linux/sunrpc/addr.h>
+#include <linux/module.h>
+
+#include "nfs4session.h"
+#include "internal.h"
+#include "pnfs.h"
+
+#define NFSDBG_FACILITY NFSDBG_PNFS
+
+void pnfs_generic_rw_release(void *data)
+{
+ struct nfs_pgio_header *hdr = data;
+
+ 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 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;
+}
+
+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;
+
+ lockdep_assert_held(cinfo->lock);
+ 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.
+ */
+int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo,
+ int max)
+{
+ int i, rv = 0, cnt;
+
+ lockdep_assert_held(cinfo->lock);
+ 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;
+
+ lockdep_assert_held(cinfo->lock);
+restart:
+ 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);
+ spin_lock(cinfo->lock);
+ goto restart;
+ }
+ }
+ cinfo->ds->nwritten = 0;
+}
+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, i);
+ 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, 0);
+ 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,
+ NFS_PROTO(data->inode),
+ 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);
+
+/*
+ * Data server cache
+ *
+ * Data servers can be mapped to different device ids.
+ * nfs4_pnfs_ds reference counting
+ * - set to 1 on allocation
+ * - incremented when a device id maps a data server already in the cache.
+ * - decremented when deviceid is removed from the cache.
+ */
+static DEFINE_SPINLOCK(nfs4_ds_cache_lock);
+static LIST_HEAD(nfs4_data_server_cache);
+
+/* Debug routines */
+static void
+print_ds(struct nfs4_pnfs_ds *ds)
+{
+ if (ds == NULL) {
+ printk(KERN_WARNING "%s NULL device\n", __func__);
+ return;
+ }
+ printk(KERN_WARNING " ds %s\n"
+ " ref count %d\n"
+ " client %p\n"
+ " cl_exchange_flags %x\n",
+ ds->ds_remotestr,
+ atomic_read(&ds->ds_count), ds->ds_clp,
+ ds->ds_clp ? ds->ds_clp->cl_exchange_flags : 0);
+}
+
+static bool
+same_sockaddr(struct sockaddr *addr1, struct sockaddr *addr2)
+{
+ struct sockaddr_in *a, *b;
+ struct sockaddr_in6 *a6, *b6;
+
+ if (addr1->sa_family != addr2->sa_family)
+ return false;
+
+ switch (addr1->sa_family) {
+ case AF_INET:
+ a = (struct sockaddr_in *)addr1;
+ b = (struct sockaddr_in *)addr2;
+
+ if (a->sin_addr.s_addr == b->sin_addr.s_addr &&
+ a->sin_port == b->sin_port)
+ return true;
+ break;
+
+ case AF_INET6:
+ a6 = (struct sockaddr_in6 *)addr1;
+ b6 = (struct sockaddr_in6 *)addr2;
+
+ /* LINKLOCAL addresses must have matching scope_id */
+ if (ipv6_addr_src_scope(&a6->sin6_addr) ==
+ IPV6_ADDR_SCOPE_LINKLOCAL &&
+ a6->sin6_scope_id != b6->sin6_scope_id)
+ return false;
+
+ if (ipv6_addr_equal(&a6->sin6_addr, &b6->sin6_addr) &&
+ a6->sin6_port == b6->sin6_port)
+ return true;
+ break;
+
+ default:
+ dprintk("%s: unhandled address family: %u\n",
+ __func__, addr1->sa_family);
+ return false;
+ }
+
+ return false;
+}
+
+static bool
+_same_data_server_addrs_locked(const struct list_head *dsaddrs1,
+ const struct list_head *dsaddrs2)
+{
+ struct nfs4_pnfs_ds_addr *da1, *da2;
+
+ /* step through both lists, comparing as we go */
+ for (da1 = list_first_entry(dsaddrs1, typeof(*da1), da_node),
+ da2 = list_first_entry(dsaddrs2, typeof(*da2), da_node);
+ da1 != NULL && da2 != NULL;
+ da1 = list_entry(da1->da_node.next, typeof(*da1), da_node),
+ da2 = list_entry(da2->da_node.next, typeof(*da2), da_node)) {
+ if (!same_sockaddr((struct sockaddr *)&da1->da_addr,
+ (struct sockaddr *)&da2->da_addr))
+ return false;
+ }
+ if (da1 == NULL && da2 == NULL)
+ return true;
+
+ return false;
+}
+
+/*
+ * Lookup DS by addresses. nfs4_ds_cache_lock is held
+ */
+static struct nfs4_pnfs_ds *
+_data_server_lookup_locked(const struct list_head *dsaddrs)
+{
+ struct nfs4_pnfs_ds *ds;
+
+ list_for_each_entry(ds, &nfs4_data_server_cache, ds_node)
+ if (_same_data_server_addrs_locked(&ds->ds_addrs, dsaddrs))
+ return ds;
+ return NULL;
+}
+
+static void destroy_ds(struct nfs4_pnfs_ds *ds)
+{
+ struct nfs4_pnfs_ds_addr *da;
+
+ dprintk("--> %s\n", __func__);
+ ifdebug(FACILITY)
+ print_ds(ds);
+
+ nfs_put_client(ds->ds_clp);
+
+ while (!list_empty(&ds->ds_addrs)) {
+ da = list_first_entry(&ds->ds_addrs,
+ struct nfs4_pnfs_ds_addr,
+ da_node);
+ list_del_init(&da->da_node);
+ kfree(da->da_remotestr);
+ kfree(da);
+ }
+
+ kfree(ds->ds_remotestr);
+ kfree(ds);
+}
+
+void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds)
+{
+ if (atomic_dec_and_lock(&ds->ds_count,
+ &nfs4_ds_cache_lock)) {
+ list_del_init(&ds->ds_node);
+ spin_unlock(&nfs4_ds_cache_lock);
+ destroy_ds(ds);
+ }
+}
+EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_put);
+
+/*
+ * Create a string with a human readable address and port to avoid
+ * complicated setup around many dprinks.
+ */
+static char *
+nfs4_pnfs_remotestr(struct list_head *dsaddrs, gfp_t gfp_flags)
+{
+ struct nfs4_pnfs_ds_addr *da;
+ char *remotestr;
+ size_t len;
+ char *p;
+
+ len = 3; /* '{', '}' and eol */
+ list_for_each_entry(da, dsaddrs, da_node) {
+ len += strlen(da->da_remotestr) + 1; /* string plus comma */
+ }
+
+ remotestr = kzalloc(len, gfp_flags);
+ if (!remotestr)
+ return NULL;
+
+ p = remotestr;
+ *(p++) = '{';
+ len--;
+ list_for_each_entry(da, dsaddrs, da_node) {
+ size_t ll = strlen(da->da_remotestr);
+
+ if (ll > len)
+ goto out_err;
+
+ memcpy(p, da->da_remotestr, ll);
+ p += ll;
+ len -= ll;
+
+ if (len < 1)
+ goto out_err;
+ (*p++) = ',';
+ len--;
+ }
+ if (len < 2)
+ goto out_err;
+ *(p++) = '}';
+ *p = '\0';
+ return remotestr;
+out_err:
+ kfree(remotestr);
+ return NULL;
+}
+
+/*
+ * Given a list of multipath struct nfs4_pnfs_ds_addr, add it to ds cache if
+ * uncached and return cached struct nfs4_pnfs_ds.
+ */
+struct nfs4_pnfs_ds *
+nfs4_pnfs_ds_add(struct list_head *dsaddrs, gfp_t gfp_flags)
+{
+ struct nfs4_pnfs_ds *tmp_ds, *ds = NULL;
+ char *remotestr;
+
+ if (list_empty(dsaddrs)) {
+ dprintk("%s: no addresses defined\n", __func__);
+ goto out;
+ }
+
+ ds = kzalloc(sizeof(*ds), gfp_flags);
+ if (!ds)
+ goto out;
+
+ /* this is only used for debugging, so it's ok if its NULL */
+ remotestr = nfs4_pnfs_remotestr(dsaddrs, gfp_flags);
+
+ spin_lock(&nfs4_ds_cache_lock);
+ tmp_ds = _data_server_lookup_locked(dsaddrs);
+ if (tmp_ds == NULL) {
+ INIT_LIST_HEAD(&ds->ds_addrs);
+ list_splice_init(dsaddrs, &ds->ds_addrs);
+ ds->ds_remotestr = remotestr;
+ atomic_set(&ds->ds_count, 1);
+ INIT_LIST_HEAD(&ds->ds_node);
+ ds->ds_clp = NULL;
+ list_add(&ds->ds_node, &nfs4_data_server_cache);
+ dprintk("%s add new data server %s\n", __func__,
+ ds->ds_remotestr);
+ } else {
+ kfree(remotestr);
+ kfree(ds);
+ atomic_inc(&tmp_ds->ds_count);
+ dprintk("%s data server %s found, inc'ed ds_count to %d\n",
+ __func__, tmp_ds->ds_remotestr,
+ atomic_read(&tmp_ds->ds_count));
+ ds = tmp_ds;
+ }
+ spin_unlock(&nfs4_ds_cache_lock);
+out:
+ return ds;
+}
+EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_add);
+
+static void nfs4_wait_ds_connect(struct nfs4_pnfs_ds *ds)
+{
+ might_sleep();
+ wait_on_bit(&ds->ds_state, NFS4DS_CONNECTING,
+ TASK_KILLABLE);
+}
+
+static void nfs4_clear_ds_conn_bit(struct nfs4_pnfs_ds *ds)
+{
+ smp_mb__before_atomic();
+ clear_bit(NFS4DS_CONNECTING, &ds->ds_state);
+ smp_mb__after_atomic();
+ wake_up_bit(&ds->ds_state, NFS4DS_CONNECTING);
+}
+
+static struct nfs_client *(*get_v3_ds_connect)(
+ struct nfs_client *mds_clp,
+ const struct sockaddr *ds_addr,
+ int ds_addrlen,
+ int ds_proto,
+ unsigned int ds_timeo,
+ unsigned int ds_retrans,
+ rpc_authflavor_t au_flavor);
+
+static bool load_v3_ds_connect(void)
+{
+ if (!get_v3_ds_connect) {
+ get_v3_ds_connect = symbol_request(nfs3_set_ds_client);
+ WARN_ON_ONCE(!get_v3_ds_connect);
+ }
+
+ return(get_v3_ds_connect != NULL);
+}
+
+void __exit nfs4_pnfs_v3_ds_connect_unload(void)
+{
+ if (get_v3_ds_connect) {
+ symbol_put(nfs3_set_ds_client);
+ get_v3_ds_connect = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(nfs4_pnfs_v3_ds_connect_unload);
+
+static int _nfs4_pnfs_v3_ds_connect(struct nfs_server *mds_srv,
+ struct nfs4_pnfs_ds *ds,
+ unsigned int timeo,
+ unsigned int retrans,
+ rpc_authflavor_t au_flavor)
+{
+ struct nfs_client *clp = ERR_PTR(-EIO);
+ struct nfs4_pnfs_ds_addr *da;
+ int status = 0;
+
+ dprintk("--> %s DS %s au_flavor %d\n", __func__,
+ ds->ds_remotestr, au_flavor);
+
+ if (!load_v3_ds_connect())
+ goto out;
+
+ list_for_each_entry(da, &ds->ds_addrs, da_node) {
+ dprintk("%s: DS %s: trying address %s\n",
+ __func__, ds->ds_remotestr, da->da_remotestr);
+
+ clp = get_v3_ds_connect(mds_srv->nfs_client,
+ (struct sockaddr *)&da->da_addr,
+ da->da_addrlen, IPPROTO_TCP,
+ timeo, retrans, au_flavor);
+ if (!IS_ERR(clp))
+ break;
+ }
+
+ if (IS_ERR(clp)) {
+ status = PTR_ERR(clp);
+ goto out;
+ }
+
+ smp_wmb();
+ ds->ds_clp = clp;
+ dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr);
+out:
+ return status;
+}
+
+static int _nfs4_pnfs_v4_ds_connect(struct nfs_server *mds_srv,
+ struct nfs4_pnfs_ds *ds,
+ unsigned int timeo,
+ unsigned int retrans,
+ u32 minor_version,
+ rpc_authflavor_t au_flavor)
+{
+ struct nfs_client *clp = ERR_PTR(-EIO);
+ struct nfs4_pnfs_ds_addr *da;
+ int status = 0;
+
+ dprintk("--> %s DS %s au_flavor %d\n", __func__, ds->ds_remotestr,
+ au_flavor);
+
+ list_for_each_entry(da, &ds->ds_addrs, da_node) {
+ dprintk("%s: DS %s: trying address %s\n",
+ __func__, ds->ds_remotestr, da->da_remotestr);
+
+ clp = nfs4_set_ds_client(mds_srv->nfs_client,
+ (struct sockaddr *)&da->da_addr,
+ da->da_addrlen, IPPROTO_TCP,
+ timeo, retrans, minor_version,
+ au_flavor);
+ if (!IS_ERR(clp))
+ break;
+ }
+
+ if (IS_ERR(clp)) {
+ status = PTR_ERR(clp);
+ goto out;
+ }
+
+ status = nfs4_init_ds_session(clp, mds_srv->nfs_client->cl_lease_time);
+ if (status)
+ goto out_put;
+
+ smp_wmb();
+ ds->ds_clp = clp;
+ dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr);
+out:
+ return status;
+out_put:
+ nfs_put_client(clp);
+ goto out;
+}
+
+/*
+ * Create an rpc connection to the nfs4_pnfs_ds data server.
+ * Currently only supports IPv4 and IPv6 addresses.
+ * If connection fails, make devid unavailable.
+ */
+void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
+ struct nfs4_deviceid_node *devid, unsigned int timeo,
+ unsigned int retrans, u32 version,
+ u32 minor_version, rpc_authflavor_t au_flavor)
+{
+ if (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) == 0) {
+ int err = 0;
+
+ if (version == 3) {
+ err = _nfs4_pnfs_v3_ds_connect(mds_srv, ds, timeo,
+ retrans, au_flavor);
+ } else if (version == 4) {
+ err = _nfs4_pnfs_v4_ds_connect(mds_srv, ds, timeo,
+ retrans, minor_version,
+ au_flavor);
+ } else {
+ dprintk("%s: unsupported DS version %d\n", __func__,
+ version);
+ err = -EPROTONOSUPPORT;
+ }
+
+ if (err)
+ nfs4_mark_deviceid_unavailable(devid);
+ nfs4_clear_ds_conn_bit(ds);
+ } else {
+ nfs4_wait_ds_connect(ds);
+ }
+}
+EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_connect);
+
+/*
+ * Currently only supports ipv4, ipv6 and one multi-path address.
+ */
+struct nfs4_pnfs_ds_addr *
+nfs4_decode_mp_ds_addr(struct net *net, struct xdr_stream *xdr, gfp_t gfp_flags)
+{
+ struct nfs4_pnfs_ds_addr *da = NULL;
+ char *buf, *portstr;
+ __be16 port;
+ int nlen, rlen;
+ int tmp[2];
+ __be32 *p;
+ char *netid, *match_netid;
+ size_t len, match_netid_len;
+ char *startsep = "";
+ char *endsep = "";
+
+
+ /* r_netid */
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_err;
+ nlen = be32_to_cpup(p++);
+
+ p = xdr_inline_decode(xdr, nlen);
+ if (unlikely(!p))
+ goto out_err;
+
+ netid = kmalloc(nlen+1, gfp_flags);
+ if (unlikely(!netid))
+ goto out_err;
+
+ netid[nlen] = '\0';
+ memcpy(netid, p, nlen);
+
+ /* r_addr: ip/ip6addr with port in dec octets - see RFC 5665 */
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_free_netid;
+ rlen = be32_to_cpup(p);
+
+ p = xdr_inline_decode(xdr, rlen);
+ if (unlikely(!p))
+ goto out_free_netid;
+
+ /* port is ".ABC.DEF", 8 chars max */
+ if (rlen > INET6_ADDRSTRLEN + IPV6_SCOPE_ID_LEN + 8) {
+ dprintk("%s: Invalid address, length %d\n", __func__,
+ rlen);
+ goto out_free_netid;
+ }
+ buf = kmalloc(rlen + 1, gfp_flags);
+ if (!buf) {
+ dprintk("%s: Not enough memory\n", __func__);
+ goto out_free_netid;
+ }
+ buf[rlen] = '\0';
+ memcpy(buf, p, rlen);
+
+ /* replace port '.' with '-' */
+ portstr = strrchr(buf, '.');
+ if (!portstr) {
+ dprintk("%s: Failed finding expected dot in port\n",
+ __func__);
+ goto out_free_buf;
+ }
+ *portstr = '-';
+
+ /* find '.' between address and port */
+ portstr = strrchr(buf, '.');
+ if (!portstr) {
+ dprintk("%s: Failed finding expected dot between address and "
+ "port\n", __func__);
+ goto out_free_buf;
+ }
+ *portstr = '\0';
+
+ da = kzalloc(sizeof(*da), gfp_flags);
+ if (unlikely(!da))
+ goto out_free_buf;
+
+ INIT_LIST_HEAD(&da->da_node);
+
+ if (!rpc_pton(net, buf, portstr-buf, (struct sockaddr *)&da->da_addr,
+ sizeof(da->da_addr))) {
+ dprintk("%s: error parsing address %s\n", __func__, buf);
+ goto out_free_da;
+ }
+
+ portstr++;
+ sscanf(portstr, "%d-%d", &tmp[0], &tmp[1]);
+ port = htons((tmp[0] << 8) | (tmp[1]));
+
+ switch (da->da_addr.ss_family) {
+ case AF_INET:
+ ((struct sockaddr_in *)&da->da_addr)->sin_port = port;
+ da->da_addrlen = sizeof(struct sockaddr_in);
+ match_netid = "tcp";
+ match_netid_len = 3;
+ break;
+
+ case AF_INET6:
+ ((struct sockaddr_in6 *)&da->da_addr)->sin6_port = port;
+ da->da_addrlen = sizeof(struct sockaddr_in6);
+ match_netid = "tcp6";
+ match_netid_len = 4;
+ startsep = "[";
+ endsep = "]";
+ break;
+
+ default:
+ dprintk("%s: unsupported address family: %u\n",
+ __func__, da->da_addr.ss_family);
+ goto out_free_da;
+ }
+
+ if (nlen != match_netid_len || strncmp(netid, match_netid, nlen)) {
+ dprintk("%s: ERROR: r_netid \"%s\" != \"%s\"\n",
+ __func__, netid, match_netid);
+ goto out_free_da;
+ }
+
+ /* save human readable address */
+ len = strlen(startsep) + strlen(buf) + strlen(endsep) + 7;
+ da->da_remotestr = kzalloc(len, gfp_flags);
+
+ /* NULL is ok, only used for dprintk */
+ if (da->da_remotestr)
+ snprintf(da->da_remotestr, len, "%s%s%s:%u", startsep,
+ buf, endsep, ntohs(port));
+
+ dprintk("%s: Parsed DS addr %s\n", __func__, da->da_remotestr);
+ kfree(buf);
+ kfree(netid);
+ return da;
+
+out_free_da:
+ kfree(da);
+out_free_buf:
+ dprintk("%s: Error parsing DS addr: %s\n", __func__, buf);
+ kfree(buf);
+out_free_netid:
+ kfree(netid);
+out_err:
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(nfs4_decode_mp_ds_addr);
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index c91a479..568ecf0 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -70,8 +70,15 @@
void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio)
{
+ struct nfs_pgio_mirror *mirror;
+
pgio->pg_ops = &nfs_pgio_rw_ops;
- pgio->pg_bsize = NFS_SERVER(pgio->pg_inode)->rsize;
+
+ /* read path should never have more than one mirror */
+ WARN_ON_ONCE(pgio->pg_mirror_count != 1);
+
+ mirror = &pgio->pg_mirrors[0];
+ mirror->pg_bsize = NFS_SERVER(pgio->pg_inode)->rsize;
}
EXPORT_SYMBOL_GPL(nfs_pageio_reset_read_mds);
@@ -81,6 +88,7 @@
struct nfs_page *new;
unsigned int len;
struct nfs_pageio_descriptor pgio;
+ struct nfs_pgio_mirror *pgm;
len = nfs_page_length(page);
if (len == 0)
@@ -97,7 +105,13 @@
&nfs_async_read_completion_ops);
nfs_pageio_add_request(&pgio, new);
nfs_pageio_complete(&pgio);
- NFS_I(inode)->read_io += pgio.pg_bytes_written;
+
+ /* It doesn't make sense to do mirrored reads! */
+ WARN_ON_ONCE(pgio.pg_mirror_count != 1);
+
+ pgm = &pgio.pg_mirrors[0];
+ NFS_I(inode)->read_io += pgm->pg_bytes_written;
+
return 0;
}
@@ -168,13 +182,14 @@
static void nfs_initiate_read(struct nfs_pgio_header *hdr,
struct rpc_message *msg,
+ const struct nfs_rpc_ops *rpc_ops,
struct rpc_task_setup *task_setup_data, int how)
{
struct inode *inode = hdr->inode;
int swap_flags = IS_SWAPFILE(inode) ? NFS_RPC_SWAPFLAGS : 0;
task_setup_data->flags |= swap_flags;
- NFS_PROTO(inode)->read_setup(hdr, msg);
+ rpc_ops->read_setup(hdr, msg);
}
static void
@@ -351,6 +366,7 @@
struct list_head *pages, unsigned nr_pages)
{
struct nfs_pageio_descriptor pgio;
+ struct nfs_pgio_mirror *pgm;
struct nfs_readdesc desc = {
.pgio = &pgio,
};
@@ -386,10 +402,15 @@
&nfs_async_read_completion_ops);
ret = read_cache_pages(mapping, pages, readpage_async_filler, &desc);
-
nfs_pageio_complete(&pgio);
- NFS_I(inode)->read_io += pgio.pg_bytes_written;
- npages = (pgio.pg_bytes_written + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+
+ /* It doesn't make sense to do mirrored reads! */
+ WARN_ON_ONCE(pgio.pg_mirror_count != 1);
+
+ pgm = &pgio.pg_mirrors[0];
+ NFS_I(inode)->read_io += pgm->pg_bytes_written;
+ npages = (pgm->pg_bytes_written + PAGE_CACHE_SIZE - 1) >>
+ PAGE_CACHE_SHIFT;
nfs_add_stats(inode, NFSIOS_READPAGES, npages);
read_complete:
put_nfs_open_context(desc.ctx);
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index af3af68..ceacfee 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -473,13 +473,18 @@
do {
/*
* Subrequests are always contiguous, non overlapping
- * and in order. If not, it's a programming error.
+ * and in order - but may be repeated (mirrored writes).
*/
- WARN_ON_ONCE(subreq->wb_offset !=
- (head->wb_offset + total_bytes));
-
- /* keep track of how many bytes this group covers */
- total_bytes += subreq->wb_bytes;
+ if (subreq->wb_offset == (head->wb_offset + total_bytes)) {
+ /* keep track of how many bytes this group covers */
+ total_bytes += subreq->wb_bytes;
+ } else if (WARN_ON_ONCE(subreq->wb_offset < head->wb_offset ||
+ ((subreq->wb_offset + subreq->wb_bytes) >
+ (head->wb_offset + total_bytes)))) {
+ nfs_page_group_unlock(head);
+ spin_unlock(&inode->i_lock);
+ return ERR_PTR(-EIO);
+ }
if (!nfs_lock_request(subreq)) {
/* releases page group bit lock and
@@ -842,9 +847,9 @@
*/
void
nfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
- struct nfs_commit_info *cinfo)
+ struct nfs_commit_info *cinfo, u32 ds_commit_idx)
{
- if (pnfs_mark_request_commit(req, lseg, cinfo))
+ if (pnfs_mark_request_commit(req, lseg, cinfo, ds_commit_idx))
return;
nfs_request_add_commit_list(req, &cinfo->mds->list, cinfo);
}
@@ -900,7 +905,8 @@
}
if (nfs_write_need_commit(hdr)) {
memcpy(&req->wb_verf, &hdr->verf.verifier, sizeof(req->wb_verf));
- nfs_mark_request_commit(req, hdr->lseg, &cinfo);
+ nfs_mark_request_commit(req, hdr->lseg, &cinfo,
+ hdr->pgio_mirror_idx);
goto next;
}
remove_req:
@@ -1240,15 +1246,15 @@
static void nfs_initiate_write(struct nfs_pgio_header *hdr,
struct rpc_message *msg,
+ const struct nfs_rpc_ops *rpc_ops,
struct rpc_task_setup *task_setup_data, int how)
{
- struct inode *inode = hdr->inode;
int priority = flush_task_priority(how);
task_setup_data->priority = priority;
- NFS_PROTO(inode)->write_setup(hdr, msg);
+ rpc_ops->write_setup(hdr, msg);
- nfs4_state_protect_write(NFS_SERVER(inode)->nfs_client,
+ nfs4_state_protect_write(NFS_SERVER(hdr->inode)->nfs_client,
&task_setup_data->rpc_client, msg, hdr);
}
@@ -1298,8 +1304,14 @@
void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio)
{
+ struct nfs_pgio_mirror *mirror;
+
pgio->pg_ops = &nfs_pgio_rw_ops;
- pgio->pg_bsize = NFS_SERVER(pgio->pg_inode)->wsize;
+
+ nfs_pageio_stop_mirroring(pgio);
+
+ mirror = &pgio->pg_mirrors[0];
+ mirror->pg_bsize = NFS_SERVER(pgio->pg_inode)->wsize;
}
EXPORT_SYMBOL_GPL(nfs_pageio_reset_write_mds);
@@ -1465,6 +1477,7 @@
EXPORT_SYMBOL_GPL(nfs_commitdata_release);
int nfs_initiate_commit(struct rpc_clnt *clnt, struct nfs_commit_data *data,
+ const struct nfs_rpc_ops *nfs_ops,
const struct rpc_call_ops *call_ops,
int how, int flags)
{
@@ -1486,7 +1499,7 @@
.priority = priority,
};
/* Set up the initial task struct. */
- NFS_PROTO(data->inode)->commit_setup(data, &msg);
+ nfs_ops->commit_setup(data, &msg);
dprintk("NFS: %5u initiated commit call\n", data->task.tk_pid);
@@ -1554,14 +1567,15 @@
void nfs_retry_commit(struct list_head *page_list,
struct pnfs_layout_segment *lseg,
- struct nfs_commit_info *cinfo)
+ struct nfs_commit_info *cinfo,
+ u32 ds_commit_idx)
{
struct nfs_page *req;
while (!list_empty(page_list)) {
req = nfs_list_entry(page_list->next);
nfs_list_remove_request(req);
- nfs_mark_request_commit(req, lseg, cinfo);
+ nfs_mark_request_commit(req, lseg, cinfo, ds_commit_idx);
if (!cinfo->dreq) {
dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
dec_bdi_stat(page_file_mapping(req->wb_page)->backing_dev_info,
@@ -1589,10 +1603,10 @@
/* Set up the argument struct */
nfs_init_commit(data, head, NULL, cinfo);
atomic_inc(&cinfo->mds->rpcs_out);
- return nfs_initiate_commit(NFS_CLIENT(inode), data, data->mds_ops,
- how, 0);
+ return nfs_initiate_commit(NFS_CLIENT(inode), data, NFS_PROTO(inode),
+ data->mds_ops, how, 0);
out_bad:
- nfs_retry_commit(head, NULL, cinfo);
+ nfs_retry_commit(head, NULL, cinfo, 0);
cinfo->completion_ops->error_cleanup(NFS_I(inode));
return -ENOMEM;
}
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index 022b761..de7c91c 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -516,6 +516,7 @@
LAYOUT_NFSV4_1_FILES = 1,
LAYOUT_OSD2_OBJECTS = 2,
LAYOUT_BLOCK_VOLUME = 3,
+ LAYOUT_FLEX_FILES = 4,
};
/* used for both layout return and recall */
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index ddea982..5e1273d 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -77,10 +77,6 @@
/* Client owner identifier */
const char * cl_owner_id;
- /* Our own IP address, as a null-terminated string.
- * This is used to generate the mv0 callback address.
- */
- char cl_ipaddr[48];
u32 cl_cb_ident; /* v4.0 callback identifier */
const struct nfs4_minor_version_ops *cl_mvops;
unsigned long cl_mig_gen;
@@ -108,6 +104,11 @@
#define NFS_SP4_MACH_CRED_COMMIT 6 /* COMMIT */
#endif /* CONFIG_NFS_V4 */
+ /* Our own IP address, as a null-terminated string.
+ * This is used to generate the mv0 callback address.
+ */
+ char cl_ipaddr[48];
+
#ifdef CONFIG_NFS_FSCACHE
struct fscache_cookie *fscache; /* client index cache cookie */
#endif
diff --git a/include/linux/nfs_idmap.h b/include/linux/nfs_idmap.h
index 0f4b79d..333844e 100644
--- a/include/linux/nfs_idmap.h
+++ b/include/linux/nfs_idmap.h
@@ -73,5 +73,7 @@
int nfs_map_uid_to_name(const struct nfs_server *, kuid_t, char *, size_t);
int nfs_map_gid_to_group(const struct nfs_server *, kgid_t, char *, size_t);
+int nfs_map_string_to_numeric(const char *name, size_t namelen, __u32 *res);
+
extern unsigned int nfs_idmap_cache_timeout;
#endif /* NFS_IDMAP_H */
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 6c3e06e..3eb072d 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -58,6 +58,9 @@
size_t (*pg_test)(struct nfs_pageio_descriptor *, struct nfs_page *,
struct nfs_page *);
int (*pg_doio)(struct nfs_pageio_descriptor *);
+ unsigned int (*pg_get_mirror_count)(struct nfs_pageio_descriptor *,
+ struct nfs_page *);
+ void (*pg_cleanup)(struct nfs_pageio_descriptor *);
};
struct nfs_rw_ops {
@@ -69,18 +72,21 @@
struct inode *);
void (*rw_result)(struct rpc_task *, struct nfs_pgio_header *);
void (*rw_initiate)(struct nfs_pgio_header *, struct rpc_message *,
+ const struct nfs_rpc_ops *,
struct rpc_task_setup *, int);
};
-struct nfs_pageio_descriptor {
+struct nfs_pgio_mirror {
struct list_head pg_list;
unsigned long pg_bytes_written;
size_t pg_count;
size_t pg_bsize;
unsigned int pg_base;
- unsigned char pg_moreio : 1,
- pg_recoalesce : 1;
+ unsigned char pg_recoalesce : 1;
+};
+struct nfs_pageio_descriptor {
+ unsigned char pg_moreio : 1;
struct inode *pg_inode;
const struct nfs_pageio_ops *pg_ops;
const struct nfs_rw_ops *pg_rw_ops;
@@ -91,8 +97,18 @@
struct pnfs_layout_segment *pg_lseg;
struct nfs_direct_req *pg_dreq;
void *pg_layout_private;
+ unsigned int pg_bsize; /* default bsize for mirrors */
+
+ u32 pg_mirror_count;
+ struct nfs_pgio_mirror *pg_mirrors;
+ struct nfs_pgio_mirror pg_mirrors_static[1];
+ struct nfs_pgio_mirror *pg_mirrors_dynamic;
+ u32 pg_mirror_idx; /* current mirror */
};
+/* arbitrarily selected limit to number of mirrors */
+#define NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX 16
+
#define NFS_WBACK_BUSY(req) (test_bit(PG_BUSY,&(req)->wb_flags))
extern struct nfs_page *nfs_create_request(struct nfs_open_context *ctx,
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index e5c3b62..8140112 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -293,6 +293,7 @@
struct nfs4_sequence_args seq_args;
struct pnfs_layout_hdr *layout;
struct inode *inode;
+ struct pnfs_layout_range range;
nfs4_stateid stateid;
__u32 layout_type;
};
@@ -514,6 +515,7 @@
struct nfs4_sequence_res seq_res;
struct nfs_fattr * fattr;
__u32 count;
+ __u32 op_status;
int eof; /* used by read */
struct nfs_writeverf * verf; /* used by write */
const struct nfs_server *server; /* used by write */
@@ -533,6 +535,7 @@
struct nfs_commitres {
struct nfs4_sequence_res seq_res;
+ __u32 op_status;
struct nfs_fattr *fattr;
struct nfs_writeverf *verf;
const struct nfs_server *server;
@@ -1326,7 +1329,8 @@
__u64 mds_offset; /* Filelayout dense stripe */
struct nfs_page_array page_array;
struct nfs_client *ds_clp; /* pNFS data server */
- int ds_idx; /* ds index if ds_clp is set */
+ int ds_commit_idx; /* ds index if ds_clp is set */
+ int pgio_mirror_idx;/* mirror index in pgio layer */
};
struct nfs_mds_commit_info {
diff --git a/include/linux/sunrpc/metrics.h b/include/linux/sunrpc/metrics.h
index eecb5a7..7e61a17 100644
--- a/include/linux/sunrpc/metrics.h
+++ b/include/linux/sunrpc/metrics.h
@@ -79,6 +79,8 @@
struct rpc_iostats * rpc_alloc_iostats(struct rpc_clnt *);
void rpc_count_iostats(const struct rpc_task *,
struct rpc_iostats *);
+void rpc_count_iostats_metrics(const struct rpc_task *,
+ struct rpc_iostats *);
void rpc_print_iostats(struct seq_file *, struct rpc_clnt *);
void rpc_free_iostats(struct rpc_iostats *);
@@ -87,6 +89,8 @@
static inline struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt) { return NULL; }
static inline void rpc_count_iostats(const struct rpc_task *task,
struct rpc_iostats *stats) {}
+static inline void rpc_count_iostats_metrics(const struct rpc_task *,
+ struct rpc_iostats *) {}
static inline void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt) {}
static inline void rpc_free_iostats(struct rpc_iostats *stats) {}
diff --git a/net/sunrpc/stats.c b/net/sunrpc/stats.c
index 9711a15..2ecb994 100644
--- a/net/sunrpc/stats.c
+++ b/net/sunrpc/stats.c
@@ -140,22 +140,20 @@
EXPORT_SYMBOL_GPL(rpc_free_iostats);
/**
- * rpc_count_iostats - tally up per-task stats
+ * rpc_count_iostats_metrics - tally up per-task stats
* @task: completed rpc_task
- * @stats: array of stat structures
+ * @op_metrics: stat structure for OP that will accumulate stats from @task
*/
-void rpc_count_iostats(const struct rpc_task *task, struct rpc_iostats *stats)
+void rpc_count_iostats_metrics(const struct rpc_task *task,
+ struct rpc_iostats *op_metrics)
{
struct rpc_rqst *req = task->tk_rqstp;
- struct rpc_iostats *op_metrics;
ktime_t delta, now;
- if (!stats || !req)
+ if (!op_metrics || !req)
return;
now = ktime_get();
- op_metrics = &stats[task->tk_msg.rpc_proc->p_statidx];
-
spin_lock(&op_metrics->om_lock);
op_metrics->om_ops++;
@@ -175,6 +173,20 @@
spin_unlock(&op_metrics->om_lock);
}
+EXPORT_SYMBOL_GPL(rpc_count_iostats_metrics);
+
+/**
+ * rpc_count_iostats - tally up per-task stats
+ * @task: completed rpc_task
+ * @stats: array of stat structures
+ *
+ * Uses the statidx from @task
+ */
+void rpc_count_iostats(const struct rpc_task *task, struct rpc_iostats *stats)
+{
+ rpc_count_iostats_metrics(task,
+ &stats[task->tk_msg.rpc_proc->p_statidx]);
+}
EXPORT_SYMBOL_GPL(rpc_count_iostats);
static void _print_name(struct seq_file *seq, unsigned int op,