This is part of moving objio_osd to use the ORE.
objlayout_io_state had two functions:
1. It was used in the error reporting mechanism at layout_return.
This function is kept intact.
(Later patch will rename objlayout_io_state => objlayout_io_res)
2. Carrier of rw io members into the objio_read/write_paglist API.
This is removed in this patch.
The {r,w}data received from NFS are passed directly to the
objio_{read,write}_paglist API. The io_engine is now allocating
it's own IO state as part of the read/write. The minimal
functionality that was part of the generic allocation is passed
to the io_engine.
So part of this patch is rename of:
ios->ol_state.foo => ios->foo
At objlayout_{read,write}_done an objlayout_io_state is passed that
denotes the result of the IO. (Hence the later name change).
If the IO is successful objlayout calls an objio_free_result() API
immediately (Which for objio_osd causes the release of the io_state).
If the IO ended in an error it is hanged onto until reported in
layout_return and is released later through the objio_free_result()
API. (All this is not new just renamed and cleaned)
Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
---
fs/nfs/objlayout/objio_osd.c | 94 ++++++++++++++++++++++----------
fs/nfs/objlayout/objlayout.c | 124 +++++++++++-------------------------------
fs/nfs/objlayout/objlayout.h | 36 ++++++-------
3 files changed, 112 insertions(+), 142 deletions(-)
diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c
index 0c7c9ec..48eb91a 100644
--- a/fs/nfs/objlayout/objio_osd.c
+++ b/fs/nfs/objlayout/objio_osd.c
@@ -148,6 +148,13 @@ struct objio_state {
/* Generic layer */
struct objlayout_io_state ol_state;
+ struct page **pages;
+ unsigned pgbase;
+ unsigned nr_pages;
+ unsigned long count;
+ loff_t offset;
+ bool sync;
+
struct objio_segment *layout;
struct kref kref;
@@ -394,30 +401,43 @@ void objio_free_lseg(struct pnfs_layout_segment *lseg)
kfree(objio_seg);
}
-int objio_alloc_io_state(struct pnfs_layout_segment *lseg,
- struct objlayout_io_state **outp,
- gfp_t gfp_flags)
+static int
+objio_alloc_io_state(struct pnfs_layout_hdr *pnfs_layout_type,
+ struct pnfs_layout_segment *lseg, struct page **pages, unsigned pgbase,
+ loff_t offset, size_t count, void *rpcdata, gfp_t gfp_flags,
+ struct objio_state **outp)
{
struct objio_segment *objio_seg = OBJIO_LSEG(lseg);
struct objio_state *ios;
- const unsigned first_size = sizeof(*ios) +
- objio_seg->num_comps * sizeof(ios->per_dev[0]);
- const unsigned sec_size = objio_seg->num_comps *
- sizeof(ios->ol_state.ioerrs[0]);
-
- ios = kzalloc(first_size + sec_size, gfp_flags);
- if (unlikely(!ios))
+ struct __alloc_objio_state {
+ struct objio_state objios;
+ struct _objio_per_comp per_dev[objio_seg->num_comps];
+ struct pnfs_osd_ioerr ioerrs[objio_seg->num_comps];
+ } *aos;
+
+ aos = kzalloc(sizeof(*aos), gfp_flags);
+ if (unlikely(!aos))
return -ENOMEM;
- ios->layout = objio_seg;
- ios->ol_state.ioerrs = ((void *)ios) + first_size;
- ios->ol_state.num_comps = objio_seg->num_comps;
+ ios = &aos->objios;
- *outp = &ios->ol_state;
+ ios->layout = objio_seg;
+ objlayout_init_ioerrs(&aos->objios.ol_state, objio_seg->num_comps,
+ aos->ioerrs, rpcdata, pnfs_layout_type);
+
+ ios->pages = pages;
+ ios->pgbase = pgbase;
+ ios->nr_pages = (pgbase + count + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ ios->offset = offset;
+ ios->count = count;
+ ios->sync = 0;
+ BUG_ON(ios->nr_pages > (pgbase + count + PAGE_SIZE - 1) >> PAGE_SHIFT);
+
+ *outp = ios;
return 0;
}
-void objio_free_io_state(struct objlayout_io_state *ol_state)
+void objio_free_result(struct objlayout_io_state *ol_state)
{
struct objio_state *ios = container_of(ol_state, struct objio_state,
ol_state);
@@ -598,7 +618,7 @@ static int _add_stripe_unit(struct objio_state *ios, unsigned *cur_pg,
if (per_dev->bio == NULL) {
unsigned pages_in_stripe = ios->layout->group_width *
(ios->layout->stripe_unit / PAGE_SIZE);
- unsigned bio_size = (ios->ol_state.nr_pages + pages_in_stripe) /
+ unsigned bio_size = (ios->nr_pages + pages_in_stripe) /
ios->layout->group_width;
if (BIO_MAX_PAGES_KMALLOC < bio_size)
@@ -615,11 +635,11 @@ static int _add_stripe_unit(struct objio_state *ios, unsigned *cur_pg,
unsigned pglen = min_t(unsigned, PAGE_SIZE - pgbase, cur_len);
unsigned added_len;
- BUG_ON(ios->ol_state.nr_pages <= pg);
+ BUG_ON(ios->nr_pages <= pg);
cur_len -= pglen;
added_len = bio_add_pc_page(q, per_dev->bio,
- ios->ol_state.pages[pg], pglen, pgbase);
+ ios->pages[pg], pglen, pgbase);
if (unlikely(pglen != added_len))
return -ENOMEM;
pgbase = 0;
@@ -660,7 +680,7 @@ static int _prepare_one_group(struct objio_state *ios, u64 length,
cur_len = stripe_unit - si->unit_off;
page_off = si->unit_off & ~PAGE_MASK;
BUG_ON(page_off &&
- (page_off != ios->ol_state.pgbase));
+ (page_off != ios->pgbase));
} else { /* dev > si->dev */
per_dev->offset = si->obj_offset - si->unit_off;
cur_len = stripe_unit;
@@ -693,8 +713,8 @@ out:
static int _io_rw_pagelist(struct objio_state *ios, gfp_t gfp_flags)
{
- u64 length = ios->ol_state.count;
- u64 offset = ios->ol_state.offset;
+ u64 length = ios->count;
+ u64 offset = ios->offset;
struct _striping_info si;
unsigned last_pg = 0;
int ret = 0;
@@ -748,7 +768,7 @@ static int _io_exec(struct objio_state *ios)
int ret = 0;
unsigned i;
objio_done_fn saved_done_fn = ios->done;
- bool sync = ios->ol_state.sync;
+ bool sync = ios->sync;
if (sync) {
ios->done = _sync_done;
@@ -792,7 +812,7 @@ static int _read_done(struct objio_state *ios)
else
status = ret;
- objlayout_read_done(&ios->ol_state, status, ios->ol_state.sync);
+ objlayout_read_done(&ios->ol_state, status, ios->sync);
return ret;
}
@@ -854,12 +874,18 @@ err:
return ret;
}
-int objio_read_pagelist(struct objlayout_io_state *ol_state)
+int objio_read_pagelist(struct nfs_read_data *rdata)
{
- struct objio_state *ios = container_of(ol_state, struct objio_state,
- ol_state);
+ struct objio_state *ios;
int ret;
+ ret = objio_alloc_io_state(NFS_I(rdata->inode)->layout,
+ rdata->lseg, rdata->args.pages, rdata->args.pgbase,
+ rdata->args.offset, rdata->args.count, rdata,
+ GFP_KERNEL, &ios);
+ if (unlikely(ret))
+ return ret;
+
ret = _io_rw_pagelist(ios, GFP_KERNEL);
if (unlikely(ret))
return ret;
@@ -886,7 +912,7 @@ static int _write_done(struct objio_state *ios)
status = ret;
}
- objlayout_write_done(&ios->ol_state, status, ios->ol_state.sync);
+ objlayout_write_done(&ios->ol_state, status, ios->sync);
return ret;
}
@@ -976,12 +1002,20 @@ err:
return ret;
}
-int objio_write_pagelist(struct objlayout_io_state *ol_state, bool stable)
+int objio_write_pagelist(struct nfs_write_data *wdata, int how)
{
- struct objio_state *ios = container_of(ol_state, struct objio_state,
- ol_state);
+ struct objio_state *ios;
int ret;
+ ret = objio_alloc_io_state(NFS_I(wdata->inode)->layout,
+ wdata->lseg, wdata->args.pages, wdata->args.pgbase,
+ wdata->args.offset, wdata->args.count, wdata, GFP_NOFS,
+ &ios);
+ if (unlikely(ret))
+ return ret;
+
+ ios->sync = 0 != (how & FLUSH_SYNC);
+
/* TODO: ios->stable = stable; */
ret = _io_rw_pagelist(ios, GFP_NOFS);
if (unlikely(ret))
diff --git a/fs/nfs/objlayout/objlayout.c b/fs/nfs/objlayout/objlayout.c
index 99c807d..a82053a 100644
--- a/fs/nfs/objlayout/objlayout.c
+++ b/fs/nfs/objlayout/objlayout.c
@@ -156,59 +156,23 @@ last_byte_offset(u64 start, u64 len)
return end > start ? end - 1 : NFS4_MAX_UINT64;
}
-static struct objlayout_io_state *
-objlayout_alloc_io_state(struct pnfs_layout_hdr *pnfs_layout_type,
- struct page **pages,
- unsigned pgbase,
- loff_t offset,
- size_t count,
- struct pnfs_layout_segment *lseg,
- void *rpcdata,
- gfp_t gfp_flags)
+void _fix_verify_io_params(struct pnfs_layout_segment *lseg,
+ struct page ***p_pages, unsigned *p_pgbase,
+ u64 offset, unsigned long count)
{
- struct objlayout_io_state *state;
u64 lseg_end_offset;
- dprintk("%s: allocating io_state\n", __func__);
- if (objio_alloc_io_state(lseg, &state, gfp_flags))
- return NULL;
-
BUG_ON(offset < lseg->pls_range.offset);
lseg_end_offset = end_offset(lseg->pls_range.offset,
lseg->pls_range.length);
BUG_ON(offset >= lseg_end_offset);
- if (offset + count > lseg_end_offset) {
- count = lseg->pls_range.length -
- (offset - lseg->pls_range.offset);
- dprintk("%s: truncated count %Zd\n", __func__, count);
- }
+ WARN_ON(offset + count > lseg_end_offset);
- if (pgbase > PAGE_SIZE) {
- pages += pgbase >> PAGE_SHIFT;
- pgbase &= ~PAGE_MASK;
+ if (*p_pgbase > PAGE_SIZE) {
+ dprintk("%s: pgbase(0x%x) > PAGE_SIZE\n", __func__, *p_pgbase);
+ *p_pages += *p_pgbase >> PAGE_SHIFT;
+ *p_pgbase &= ~PAGE_MASK;
}
-
- INIT_LIST_HEAD(&state->err_list);
- state->lseg = lseg;
- state->rpcdata = rpcdata;
- state->pages = pages;
- state->pgbase = pgbase;
- state->nr_pages = (pgbase + count + PAGE_SIZE - 1) >> PAGE_SHIFT;
- state->offset = offset;
- state->count = count;
- state->sync = 0;
-
- return state;
-}
-
-static void
-objlayout_free_io_state(struct objlayout_io_state *state)
-{
- dprintk("%s: freeing io_state\n", __func__);
- if (unlikely(!state))
- return;
-
- objio_free_io_state(state);
}
/*
@@ -217,12 +181,10 @@ objlayout_free_io_state(struct objlayout_io_state *state)
static void
objlayout_iodone(struct objlayout_io_state *state)
{
- dprintk("%s: state %p status\n", __func__, state);
-
if (likely(state->status >= 0)) {
- objlayout_free_io_state(state);
+ objio_free_result(state);
} else {
- struct objlayout *objlay = OBJLAYOUT(state->lseg->pls_layout);
+ struct objlayout *objlay = state->objlay;
spin_lock(&objlay->lock);
objlay->delta_space_valid = OBJ_DSU_INVALID;
@@ -289,15 +251,15 @@ objlayout_read_done(struct objlayout_io_state *state, ssize_t status, bool sync)
{
struct nfs_read_data *rdata = state->rpcdata;
- state->status = status;
- dprintk("%s: Begin status=%zd eof=%d\n", __func__,
- status, rdata->res.eof);
- rdata->task.tk_status = status;
+ state->status = rdata->task.tk_status = status;
if (status >= 0)
rdata->res.count = status;
objlayout_iodone(state);
/* must not use state after this point */
+ dprintk("%s: Return status=%zd eof=%d sync=%d\n", __func__,
+ status, rdata->res.eof, sync);
+
if (sync)
pnfs_ld_read_done(rdata);
else {
@@ -314,7 +276,6 @@ objlayout_read_pagelist(struct nfs_read_data *rdata)
{
loff_t offset = rdata->args.offset;
size_t count = rdata->args.count;
- struct objlayout_io_state *state;
int err;
loff_t eof;
@@ -331,20 +292,14 @@ objlayout_read_pagelist(struct nfs_read_data *rdata)
}
rdata->res.eof = (offset + count) >= eof;
+ _fix_verify_io_params(rdata->lseg, &rdata->args.pages,
+ &rdata->args.pgbase,
+ rdata->args.offset, rdata->args.count);
- state = objlayout_alloc_io_state(NFS_I(rdata->inode)->layout,
- rdata->args.pages, rdata->args.pgbase,
- offset, count,
- rdata->lseg, rdata,
- GFP_KERNEL);
- if (unlikely(!state)) {
- err = -ENOMEM;
- goto out;
- }
dprintk("%s: inode(%lx) offset 0x%llx count 0x%Zx eof=%d\n",
__func__, rdata->inode->i_ino, offset, count, rdata->res.eof);
- err = objio_read_pagelist(state);
+ err = objio_read_pagelist(rdata);
out:
if (unlikely(err)) {
rdata->pnfs_error = err;
@@ -374,23 +329,18 @@ void
objlayout_write_done(struct objlayout_io_state *state, ssize_t status,
bool sync)
{
- struct nfs_write_data *wdata;
+ struct nfs_write_data *wdata = state->rpcdata;
- dprintk("%s: Begin\n", __func__);
- wdata = state->rpcdata;
- state->status = status;
- wdata->task.tk_status = status;
+ state->status = wdata->task.tk_status = status;
if (status >= 0) {
wdata->res.count = status;
wdata->verf.committed = state->committed;
- dprintk("%s: Return status %d committed %d\n",
- __func__, wdata->task.tk_status,
- wdata->verf.committed);
- } else
- dprintk("%s: Return status %d\n",
- __func__, wdata->task.tk_status);
+ }
objlayout_iodone(state);
- /* must not use state after this point */
+ /* must not use oir after this point */
+
+ dprintk("%s: Return status %zd committed %d sync=%d\n", __func__,
+ status, wdata->verf.committed, sync);
if (sync)
pnfs_ld_write_done(wdata);
@@ -407,25 +357,13 @@ enum pnfs_try_status
objlayout_write_pagelist(struct nfs_write_data *wdata,
int how)
{
- struct objlayout_io_state *state;
int err;
- state = objlayout_alloc_io_state(NFS_I(wdata->inode)->layout,
- wdata->args.pages,
- wdata->args.pgbase,
- wdata->args.offset,
- wdata->args.count,
- wdata->lseg, wdata,
- GFP_NOFS);
- if (unlikely(!state)) {
- err = -ENOMEM;
- goto out;
- }
+ _fix_verify_io_params(wdata->lseg, &wdata->args.pages,
+ &wdata->args.pgbase,
+ wdata->args.offset, wdata->args.count);
- state->sync = how & FLUSH_SYNC;
-
- err = objio_write_pagelist(state, how & FLUSH_STABLE);
- out:
+ err = objio_write_pagelist(wdata, how);
if (unlikely(err)) {
wdata->pnfs_error = err;
dprintk("%s: Returned Error %d\n", __func__, err);
@@ -564,7 +502,7 @@ encode_accumulated_error(struct objlayout *objlay, __be32 *p)
merge_ioerr(&accumulated_err, ioerr);
}
list_del(&state->err_list);
- objlayout_free_io_state(state);
+ objio_free_result(state);
}
pnfs_osd_xdr_encode_ioerr(p, &accumulated_err);
@@ -632,7 +570,7 @@ objlayout_encode_layoutreturn(struct pnfs_layout_hdr *pnfslay,
goto loop_done;
}
list_del(&state->err_list);
- objlayout_free_io_state(state);
+ objio_free_result(state);
}
loop_done:
spin_unlock(&objlay->lock);
diff --git a/fs/nfs/objlayout/objlayout.h b/fs/nfs/objlayout/objlayout.h
index 4edac9b..d7b2ccfa 100644
--- a/fs/nfs/objlayout/objlayout.h
+++ b/fs/nfs/objlayout/objlayout.h
@@ -75,14 +75,7 @@ OBJLAYOUT(struct pnfs_layout_hdr *lo)
* embedded in objects provider io_state data structure
*/
struct objlayout_io_state {
- struct pnfs_layout_segment *lseg;
-
- struct page **pages;
- unsigned pgbase;
- unsigned nr_pages;
- unsigned long count;
- loff_t offset;
- bool sync;
+ struct objlayout *objlay;
void *rpcdata;
int status; /* res */
@@ -99,6 +92,18 @@ struct objlayout_io_state {
struct pnfs_osd_ioerr *ioerrs;
};
+static inline
+void objlayout_init_ioerrs(struct objlayout_io_state *oir, unsigned num_comps,
+ struct pnfs_osd_ioerr *ioerrs, void *rpcdata,
+ struct pnfs_layout_hdr *pnfs_layout_type)
+{
+ oir->objlay = OBJLAYOUT(pnfs_layout_type);
+ oir->rpcdata = rpcdata;
+ INIT_LIST_HEAD(&oir->err_list);
+ oir->num_comps = num_comps;
+ oir->ioerrs = ioerrs;
+}
+
/*
* Raid engine I/O API
*/
@@ -109,15 +114,10 @@ extern int objio_alloc_lseg(struct pnfs_layout_segment **outp,
gfp_t gfp_flags);
extern void objio_free_lseg(struct pnfs_layout_segment *lseg);
-extern int objio_alloc_io_state(
- struct pnfs_layout_segment *lseg,
- struct objlayout_io_state **outp,
- gfp_t gfp_flags);
-extern void objio_free_io_state(struct objlayout_io_state *state);
+extern void objio_free_result(struct objlayout_io_state *state);
-extern int objio_read_pagelist(struct objlayout_io_state *ol_state);
-extern int objio_write_pagelist(struct objlayout_io_state *ol_state,
- bool stable);
+extern int objio_read_pagelist(struct nfs_read_data *rdata);
+extern int objio_write_pagelist(struct nfs_write_data *wdata, int how);
/*
* callback API
@@ -127,10 +127,8 @@ extern void objlayout_io_set_result(struct objlayout_io_state *state,
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)
+objlayout_add_delta_space_used(struct objlayout *objlay, s64 space_used)
{
- struct objlayout *objlay = OBJLAYOUT(state->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.
--
1.7.2.3
--
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