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pNFS: Refactor nfs4_layoutget_release()

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Move the actual freeing of the struct nfs4_layoutget into fs/nfs/pnfs.c
where it can be reused by the layoutget on open code.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2018-05-30 17:16:20 -04:00
parent 2409a976a2
commit 29a8bfe52d
3 changed files with 52 additions and 47 deletions
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47
fs/nfs/nfs4proc.c
View File

@ -8692,58 +8692,13 @@ size_t max_response_pages(struct nfs_server *server)
return nfs_page_array_len(0, max_resp_sz);
}
static void nfs4_free_pages(struct page **pages, size_t size)
{
int i;
if (!pages)
return;
for (i = 0; i < size; i++) {
if (!pages[i])
break;
__free_page(pages[i]);
}
kfree(pages);
}
struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
{
struct page **pages;
int i;
pages = kcalloc(size, sizeof(struct page *), gfp_flags);
if (!pages) {
dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
return NULL;
}
for (i = 0; i < size; i++) {
pages[i] = alloc_page(gfp_flags);
if (!pages[i]) {
dprintk("%s: failed to allocate page\n", __func__);
nfs4_free_pages(pages, size);
return NULL;
}
}
return pages;
}
static void nfs4_layoutget_release(void *calldata)
{
struct nfs4_layoutget *lgp = calldata;
struct inode *inode = lgp->args.inode;
size_t max_pages = lgp->args.layout.pglen / PAGE_SIZE;
dprintk("--> %s\n", __func__);
nfs4_sequence_free_slot(&lgp->res.seq_res);
nfs4_free_pages(lgp->args.layout.pages, max_pages);
if (inode)
pnfs_put_layout_hdr(NFS_I(inode)->layout);
put_rpccred(lgp->cred);
put_nfs_open_context(lgp->args.ctx);
kfree(calldata);
pnfs_layoutget_free(lgp);
dprintk("<-- %s\n", __func__);
}

50
fs/nfs/pnfs.c
View File

@ -931,6 +931,44 @@ pnfs_find_server(struct inode *inode, struct nfs_open_context *ctx)
return server;
}
static void nfs4_free_pages(struct page **pages, size_t size)
{
int i;
if (!pages)
return;
for (i = 0; i < size; i++) {
if (!pages[i])
break;
__free_page(pages[i]);
}
kfree(pages);
}
static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
{
struct page **pages;
int i;
pages = kcalloc(size, sizeof(struct page *), gfp_flags);
if (!pages) {
dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
return NULL;
}
for (i = 0; i < size; i++) {
pages[i] = alloc_page(gfp_flags);
if (!pages[i]) {
dprintk("%s: failed to allocate page\n", __func__);
nfs4_free_pages(pages, size);
return NULL;
}
}
return pages;
}
static struct nfs4_layoutget *
pnfs_alloc_init_layoutget_args(struct inode *ino,
struct nfs_open_context *ctx,
@ -982,6 +1020,18 @@ pnfs_alloc_init_layoutget_args(struct inode *ino,
return lgp;
}
void pnfs_layoutget_free(struct nfs4_layoutget *lgp)
{
size_t max_pages = lgp->args.layout.pglen / PAGE_SIZE;
nfs4_free_pages(lgp->args.layout.pages, max_pages);
if (lgp->args.inode)
pnfs_put_layout_hdr(NFS_I(lgp->args.inode)->layout);
put_rpccred(lgp->cred);
put_nfs_open_context(lgp->args.ctx);
kfree(lgp);
}
static void pnfs_clear_layoutcommit(struct inode *inode,
struct list_head *head)
{

2
fs/nfs/pnfs.h
View File

@ -227,7 +227,6 @@ extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
/* nfs4proc.c */
extern size_t max_response_pages(struct nfs_server *server);
extern struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags);
extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
struct pnfs_device *dev,
struct rpc_cred *cred);
@ -251,6 +250,7 @@ size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
struct nfs_page *prev, struct nfs_page *req);
void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
void pnfs_layoutget_free(struct nfs4_layoutget *lgp);
void pnfs_free_lseg_list(struct list_head *tmp_list);
void pnfs_destroy_layout(struct nfs_inode *);
void pnfs_destroy_all_layouts(struct nfs_client *);