The refcounting on nfs_pgio_header was related to there being (possibly)
more than one nfs_pgio_data. Now that nfs_pgio_data has been merged into
nfs_pgio_header, there is no reason to do this ref counting. Just call
the completion callback on nfs_pgio_release/nfs_pgio_error.
Signed-off-by: Weston Andros Adamson <dros@xxxxxxxxxxxxxxx>
---
fs/nfs/internal.h | 2 +-
fs/nfs/pagelist.c | 61 +++++++++++++++++++------------------------------
fs/nfs/pnfs.c | 10 ++------
include/linux/nfs_xdr.h | 1 -
4 files changed, 27 insertions(+), 47 deletions(-)
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index f3b672b..e0e2b6d 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -240,8 +240,8 @@ int nfs_iocounter_wait(struct nfs_io_counter *c);
extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
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 *);
+void nfs_generic_pgio_reset(struct nfs_pgio_header *);
int nfs_initiate_pgio(struct rpc_clnt *, struct nfs_pgio_header *,
const struct rpc_call_ops *, int, int);
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 6ff7797..cc5ef6d 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -459,7 +459,6 @@ struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *ops)
if (hdr) {
INIT_LIST_HEAD(&hdr->pages);
spin_lock_init(&hdr->lock);
- atomic_set(&hdr->refcnt, 0);
hdr->rw_ops = ops;
}
return hdr;
@@ -477,35 +476,6 @@ void nfs_pgio_header_free(struct nfs_pgio_header *hdr)
EXPORT_SYMBOL_GPL(nfs_pgio_header_free);
/**
- * nfs_pgio_data_alloc - Allocate pageio data
- * @hdr: The header making a request
- * @pagecount: Number of pages to create
- */
-static bool nfs_pgio_data_init(struct nfs_pgio_header *hdr,
- unsigned int pagecount)
-{
- if (nfs_pgarray_set(&hdr->page_array, pagecount)) {
- atomic_inc(&hdr->refcnt);
- return true;
- }
- return false;
-}
-
-/**
- * nfs_pgio_data_destroy - Properly release pageio data
- * @hdr: The header with data to destroy
- */
-void nfs_pgio_data_destroy(struct nfs_pgio_header *hdr)
-{
- put_nfs_open_context(hdr->args.context);
- if (hdr->page_array.pagevec != hdr->page_array.page_array)
- kfree(hdr->page_array.pagevec);
- if (atomic_dec_and_test(&hdr->refcnt))
- hdr->completion_ops->completion(hdr);
-}
-EXPORT_SYMBOL_GPL(nfs_pgio_data_destroy);
-
-/**
* nfs_pgio_rpcsetup - Set up arguments for a pageio call
* @hdr: The pageio hdr
* @count: Number of bytes to read
@@ -619,7 +589,8 @@ static int nfs_pgio_error(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr)
{
set_bit(NFS_IOHDR_REDO, &hdr->flags);
- nfs_pgio_data_destroy(hdr);
+ nfs_generic_pgio_reset(hdr);
+ hdr->completion_ops->completion(hdr);
desc->pg_completion_ops->error_cleanup(&desc->pg_list);
return -ENOMEM;
}
@@ -633,7 +604,8 @@ static void nfs_pgio_release(void *calldata)
struct nfs_pgio_header *hdr = calldata;
if (hdr->rw_ops->rw_release)
hdr->rw_ops->rw_release(hdr);
- nfs_pgio_data_destroy(hdr);
+ nfs_generic_pgio_reset(hdr);
+ hdr->completion_ops->completion(hdr);
}
/**
@@ -707,9 +679,10 @@ int nfs_generic_pgio(struct nfs_pageio_descriptor *desc,
struct page **pages;
struct list_head *head = &desc->pg_list;
struct nfs_commit_info cinfo;
+ unsigned int pagecount;
- if (!nfs_pgio_data_init(hdr, nfs_page_array_len(desc->pg_base,
- desc->pg_count)))
+ pagecount = nfs_page_array_len(desc->pg_base, desc->pg_count);
+ if (!nfs_pgarray_set(&hdr->page_array, pagecount))
return nfs_pgio_error(desc, hdr);
nfs_init_cinfo(&cinfo, desc->pg_inode, desc->pg_dreq);
@@ -732,6 +705,23 @@ int nfs_generic_pgio(struct nfs_pageio_descriptor *desc,
}
EXPORT_SYMBOL_GPL(nfs_generic_pgio);
+/**
+ * nfs_generic_pgio_reset - make @hdr suitable for reuse
+ *
+ * Frees memory and releases refs from nfs_generic_pgio, so that it may
+ * be called again.
+ *
+ * @hdr: A header that has had nfs_generic_pgio called
+ */
+void nfs_generic_pgio_reset(struct nfs_pgio_header *hdr)
+{
+ put_nfs_open_context(hdr->args.context);
+ if (hdr->page_array.pagevec != hdr->page_array.page_array)
+ kfree(hdr->page_array.pagevec);
+}
+EXPORT_SYMBOL_GPL(nfs_generic_pgio_reset);
+
+
static int nfs_generic_pg_pgios(struct nfs_pageio_descriptor *desc)
{
struct nfs_pgio_header *hdr;
@@ -743,14 +733,11 @@ static int nfs_generic_pg_pgios(struct nfs_pageio_descriptor *desc)
return -ENOMEM;
}
nfs_pgheader_init(desc, hdr, nfs_pgio_header_free);
- atomic_inc(&hdr->refcnt);
ret = nfs_generic_pgio(desc, hdr);
if (ret == 0)
ret = nfs_initiate_pgio(NFS_CLIENT(hdr->inode),
hdr, desc->pg_rpc_callops,
desc->pg_ioflags, 0);
- if (atomic_dec_and_test(&hdr->refcnt))
- hdr->completion_ops->completion(hdr);
return ret;
}
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 1b7da44..902783ab 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1537,7 +1537,7 @@ pnfs_write_through_mds(struct nfs_pageio_descriptor *desc,
nfs_pageio_reset_write_mds(desc);
desc->pg_recoalesce = 1;
}
- nfs_pgio_data_destroy(hdr);
+ nfs_generic_pgio_reset(hdr);
}
static enum pnfs_try_status
@@ -1598,15 +1598,12 @@ pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc)
}
nfs_pgheader_init(desc, hdr, pnfs_writehdr_free);
hdr->lseg = pnfs_get_lseg(desc->pg_lseg);
- atomic_inc(&hdr->refcnt);
ret = nfs_generic_pgio(desc, hdr);
if (ret != 0) {
pnfs_put_lseg(desc->pg_lseg);
desc->pg_lseg = NULL;
} else
pnfs_do_write(desc, hdr, desc->pg_ioflags);
- if (atomic_dec_and_test(&hdr->refcnt))
- hdr->completion_ops->completion(hdr);
return ret;
}
EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages);
@@ -1677,7 +1674,7 @@ pnfs_read_through_mds(struct nfs_pageio_descriptor *desc,
nfs_pageio_reset_read_mds(desc);
desc->pg_recoalesce = 1;
}
- nfs_pgio_data_destroy(hdr);
+ nfs_generic_pgio_reset(hdr);
}
/*
@@ -1741,15 +1738,12 @@ pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc)
}
nfs_pgheader_init(desc, hdr, pnfs_readhdr_free);
hdr->lseg = pnfs_get_lseg(desc->pg_lseg);
- atomic_inc(&hdr->refcnt);
ret = nfs_generic_pgio(desc, hdr);
if (ret != 0) {
pnfs_put_lseg(desc->pg_lseg);
desc->pg_lseg = NULL;
} else
pnfs_do_read(desc, hdr);
- if (atomic_dec_and_test(&hdr->refcnt))
- hdr->completion_ops->completion(hdr);
return ret;
}
EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages);
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index e1b7b3b..81cbbf31 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1259,7 +1259,6 @@ struct nfs_pgio_header {
struct inode *inode;
struct rpc_cred *cred;
struct list_head pages;
- atomic_t refcnt;
struct nfs_page *req;
struct nfs_writeverf verf; /* Used for writes */
struct pnfs_layout_segment *lseg;
--
1.8.5.2 (Apple Git-48)
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