From: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
* Define API for io-engines to report delta_space_used in IOs
* Encode the osd-layout specific information of the layoutcommit
XDR buffer.
Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
[check for OBJ_DSU_INVALID in objlayout_add_delta_space_used under lock]
[use new alloc/free_layout API]
[apply types rename]
[convert to new pnfs-submit changes]
[fixup encode_layoutcommit arguments]
[fixup layoutcommit methods args]
[use pnfs_layout_hdr and layout_segment field prefix]
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
---
fs/nfs/nfs4xdr.c | 6 +++++-
fs/nfs/objlayout/objio_osd.c | 1 +
fs/nfs/objlayout/objlayout.c | 30 ++++++++++++++++++++++++++++++
fs/nfs/objlayout/objlayout.h | 32 +++++++++++++++++++++++++++++++-
fs/nfs/objlayout/pnfs_osd_xdr_cli.c | 23 +++++++++++++++++++++++
5 files changed, 90 insertions(+), 2 deletions(-)
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 808c996..d5f15b6 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -336,7 +336,11 @@ static int nfs4_stat_to_errno(int);
2 /* last byte written */ + \
1 /* nt_timechanged (false) */ + \
1 /* layoutupdate4 layout type */ + \
- 1 /* NULL filelayout layoutupdate4 payload */)
+ /* pnfs-obj pnfs_osd_layoutupdate4 */ \
+ 1 /* lou_body size */ + \
+ 1 /* dsu_body */ + \
+ 2 /* dsu_delta */ + \
+ 1 /* ioerr_flag */ )
#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \
encode_stateid_maxsz + \
diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c
index 9c9dc9a..0988e1e 100644
--- a/fs/nfs/objlayout/objio_osd.c
+++ b/fs/nfs/objlayout/objio_osd.c
@@ -739,6 +739,7 @@ static struct pnfs_layoutdriver_type objlayout_type = {
.write_pagelist = objlayout_write_pagelist,
.encode_layoutreturn = objlayout_encode_layoutreturn,
+ .encode_layoutcommit = objlayout_encode_layoutcommit,
};
void *objio_init_mt(void)
diff --git a/fs/nfs/objlayout/objlayout.c b/fs/nfs/objlayout/objlayout.c
index c47e03d..0b5be4d 100644
--- a/fs/nfs/objlayout/objlayout.c
+++ b/fs/nfs/objlayout/objlayout.c
@@ -343,6 +343,7 @@ objlayout_iodone(struct objlayout_io_state *state)
struct objlayout *objlay = OBJLAYOUT(state->objlseg->lseg.pls_layout);
spin_lock(&objlay->lock);
+ objlay->delta_space_valid = OBJ_DSU_INVALID;
list_add(&objlay->err_list, &state->err_list);
spin_unlock(&objlay->lock);
}
@@ -723,3 +724,32 @@ loop_done:
*start = cpu_to_be32((xdr->p - start - 1) * 4);
dprintk("%s: Return\n", __func__);
}
+
+void
+objlayout_encode_layoutcommit(struct pnfs_layout_hdr *pnfslay,
+ struct xdr_stream *xdr,
+ const struct nfs4_layoutcommit_args *args)
+{
+ struct objlayout *objlay = OBJLAYOUT(pnfslay);
+ struct pnfs_osd_layoutupdate lou;
+ __be32 *start;
+
+ dprintk("%s: Begin\n", __func__);
+
+ spin_lock(&objlay->lock);
+ lou.dsu_valid = (objlay->delta_space_valid == OBJ_DSU_VALID);
+ lou.dsu_delta = objlay->delta_space_used;
+ objlay->delta_space_used = 0;
+ objlay->delta_space_valid = OBJ_DSU_INIT;
+ lou.olu_ioerr_flag = !list_empty(&objlay->err_list);
+ spin_unlock(&objlay->lock);
+
+ start = xdr_reserve_space(xdr, 4);
+
+ BUG_ON(pnfs_osd_xdr_encode_layoutupdate(xdr, &lou));
+
+ *start = cpu_to_be32((xdr->p - start - 1) * 4);
+
+ dprintk("%s: Return delta_space_used %lld err %d\n", __func__,
+ lou.dsu_delta, lou.olu_ioerr_flag);
+}
diff --git a/fs/nfs/objlayout/objlayout.h b/fs/nfs/objlayout/objlayout.h
index 31fd34b..caee5c9 100644
--- a/fs/nfs/objlayout/objlayout.h
+++ b/fs/nfs/objlayout/objlayout.h
@@ -59,10 +59,18 @@ struct objlayout_segment {
*/
struct objlayout {
struct pnfs_layout_hdr pnfs_layout;
+ spinlock_t lock;
/* for layout_return */
- spinlock_t lock;
struct list_head err_list;
+
+ /* for layout_commit */
+ enum osd_delta_space_valid_enum {
+ OBJ_DSU_INIT = 0,
+ OBJ_DSU_VALID,
+ OBJ_DSU_INVALID,
+ } delta_space_valid;
+ s64 delta_space_used; /* consumed by write ops */
};
static inline struct objlayout *
@@ -127,6 +135,23 @@ extern void objlayout_io_set_result(struct objlayout_io_state *state,
unsigned index, int osd_error,
u64 offset, u64 length, bool is_write);
+static inline void
+objlayout_add_delta_space_used(struct objlayout_io_state *state, s64 space_used)
+{
+ struct objlayout *objlay = OBJLAYOUT(state->objlseg->lseg.pls_layout);
+
+ /* If one of the I/Os errored out and the delta_space_used was
+ * invalid we render the complete report as invalid. Protocol mandate
+ * the DSU be accurate or not reported.
+ */
+ spin_lock(&objlay->lock);
+ if (objlay->delta_space_valid != OBJ_DSU_INVALID) {
+ objlay->delta_space_valid = OBJ_DSU_VALID;
+ objlay->delta_space_used += space_used;
+ }
+ spin_unlock(&objlay->lock);
+}
+
extern void objlayout_read_done(struct objlayout_io_state *state,
ssize_t status, bool sync);
extern void objlayout_write_done(struct objlayout_io_state *state,
@@ -163,4 +188,9 @@ extern void objlayout_encode_layoutreturn(
struct xdr_stream *,
const struct nfs4_layoutreturn_args *);
+extern void objlayout_encode_layoutcommit(
+ struct pnfs_layout_hdr *,
+ struct xdr_stream *,
+ const struct nfs4_layoutcommit_args *);
+
#endif /* _OBJLAYOUT_H */
diff --git a/fs/nfs/objlayout/pnfs_osd_xdr_cli.c b/fs/nfs/objlayout/pnfs_osd_xdr_cli.c
index 232b32c49..4ff2e3e 100644
--- a/fs/nfs/objlayout/pnfs_osd_xdr_cli.c
+++ b/fs/nfs/objlayout/pnfs_osd_xdr_cli.c
@@ -405,3 +405,26 @@ int pnfs_osd_xdr_encode_ioerr(struct xdr_stream *xdr,
return 0;
}
+
+/*
+ * struct pnfs_osd_layoutupdate {
+ * u32 dsu_valid;
+ * s64 dsu_delta;
+ * u32 olu_ioerr_flag;
+ * };
+ */
+int
+pnfs_osd_xdr_encode_layoutupdate(struct xdr_stream *xdr,
+ struct pnfs_osd_layoutupdate *lou)
+{
+ __be32 *p = xdr_reserve_space(xdr, 16);
+
+ if (!p)
+ return -E2BIG;
+
+ *p++ = cpu_to_be32(lou->dsu_valid);
+ if (lou->dsu_valid)
+ p = xdr_encode_hyper(p, lou->dsu_delta);
+ *p++ = cpu_to_be32(lou->olu_ioerr_flag);
+ return 0;
+}
--
1.7.3.4
--
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