From 00bfa30abe86982ce1929e9cabd703e5546106bd Mon Sep 17 00:00:00 2001 From: Anna Schumaker Date: Tue, 6 May 2014 09:12:29 -0400 Subject: [PATCH] NFS: Create a common pgio_alloc and pgio_release function These functions are identical for the read and write paths so they can be combined. Signed-off-by: Anna Schumaker Signed-off-by: Trond Myklebust --- fs/nfs/internal.h | 6 ++--- fs/nfs/pagelist.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++- fs/nfs/pnfs.c | 4 +-- fs/nfs/read.c | 54 +++-------------------------------------- fs/nfs/write.c | 54 +++-------------------------------------- 5 files changed, 74 insertions(+), 106 deletions(-) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index b0e7a41d14a8..5ddc142c5062 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -231,13 +231,15 @@ extern void nfs_destroy_writepagecache(void); extern int __init nfs_init_directcache(void); extern void nfs_destroy_directcache(void); -extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount); extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr, void (*release)(struct nfs_pgio_header *hdr)); void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); int nfs_iocounter_wait(struct nfs_io_counter *c); +struct nfs_pgio_data *nfs_pgio_data_alloc(struct nfs_pgio_header *, unsigned int); +void nfs_pgio_data_release(struct nfs_pgio_data *); + static inline void nfs_iocounter_init(struct nfs_io_counter *c) { c->flags = 0; @@ -407,7 +409,6 @@ extern void nfs_read_prepare(struct rpc_task *task, void *calldata); extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr); extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); -extern void nfs_readdata_release(struct nfs_pgio_data *rdata); /* super.c */ void nfs_clone_super(struct super_block *, struct nfs_mount_info *); @@ -429,7 +430,6 @@ extern void nfs_writehdr_free(struct nfs_pgio_header *hdr); extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr); extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); -extern void nfs_writedata_release(struct nfs_pgio_data *wdata); extern void nfs_commit_free(struct nfs_commit_data *p); extern int nfs_initiate_write(struct rpc_clnt *clnt, struct nfs_pgio_data *data, diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 2ffebf2081ce..a98ccf722d7b 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -26,7 +26,7 @@ static struct kmem_cache *nfs_page_cachep; -bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount) +static bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount) { p->npages = pagecount; if (pagecount <= ARRAY_SIZE(p->page_array)) @@ -295,6 +295,66 @@ bool nfs_generic_pg_test(struct nfs_pageio_descriptor *desc, struct nfs_page *pr } EXPORT_SYMBOL_GPL(nfs_generic_pg_test); +static inline struct nfs_rw_header *NFS_RW_HEADER(struct nfs_pgio_header *hdr) +{ + return container_of(hdr, struct nfs_rw_header, header); +} + +/** + * nfs_pgio_data_alloc - Allocate pageio data + * @hdr: The header making a request + * @pagecount: Number of pages to create + */ +struct nfs_pgio_data *nfs_pgio_data_alloc(struct nfs_pgio_header *hdr, + unsigned int pagecount) +{ + struct nfs_pgio_data *data, *prealloc; + + prealloc = &NFS_RW_HEADER(hdr)->rpc_data; + if (prealloc->header == NULL) + data = prealloc; + else + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + goto out; + + if (nfs_pgarray_set(&data->pages, pagecount)) { + data->header = hdr; + atomic_inc(&hdr->refcnt); + } else { + if (data != prealloc) + kfree(data); + data = NULL; + } +out: + return data; +} + +/** + * nfs_pgio_data_release - Properly free pageio data + * @data: The data to release + */ +void nfs_pgio_data_release(struct nfs_pgio_data *data) +{ + struct nfs_pgio_header *hdr = data->header; + struct nfs_rw_header *pageio_header = NFS_RW_HEADER(hdr); + + put_nfs_open_context(data->args.context); + if (data->pages.pagevec != data->pages.page_array) + kfree(data->pages.pagevec); + if (data == &pageio_header->rpc_data) { + data->header = NULL; + data = NULL; + } + if (atomic_dec_and_test(&hdr->refcnt)) + hdr->completion_ops->completion(hdr); + /* Note: we only free the rpc_task after callbacks are done. + * See the comment in rpc_free_task() for why + */ + kfree(data); +} +EXPORT_SYMBOL_GPL(nfs_pgio_data_release); + /** * nfs_pageio_init - initialise a page io descriptor * @desc: pointer to descriptor diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 43cfe11aa1a4..e192ba69a7d4 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -1536,7 +1536,7 @@ pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, nfs_pageio_reset_write_mds(desc); desc->pg_recoalesce = 1; } - nfs_writedata_release(data); + nfs_pgio_data_release(data); } static enum pnfs_try_status @@ -1691,7 +1691,7 @@ pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, nfs_pageio_reset_read_mds(desc); desc->pg_recoalesce = 1; } - nfs_readdata_release(data); + nfs_pgio_data_release(data); } /* diff --git a/fs/nfs/read.c b/fs/nfs/read.c index d29ca3673694..ab4c1a5b5fbd 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -51,31 +51,6 @@ struct nfs_rw_header *nfs_readhdr_alloc(void) } EXPORT_SYMBOL_GPL(nfs_readhdr_alloc); -static struct nfs_pgio_data *nfs_readdata_alloc(struct nfs_pgio_header *hdr, - unsigned int pagecount) -{ - struct nfs_pgio_data *data, *prealloc; - - prealloc = &container_of(hdr, struct nfs_rw_header, header)->rpc_data; - if (prealloc->header == NULL) - data = prealloc; - else - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (!data) - goto out; - - if (nfs_pgarray_set(&data->pages, pagecount)) { - data->header = hdr; - atomic_inc(&hdr->refcnt); - } else { - if (data != prealloc) - kfree(data); - data = NULL; - } -out: - return data; -} - void nfs_readhdr_free(struct nfs_pgio_header *hdr) { struct nfs_rw_header *rhdr = container_of(hdr, struct nfs_rw_header, header); @@ -84,27 +59,6 @@ void nfs_readhdr_free(struct nfs_pgio_header *hdr) } EXPORT_SYMBOL_GPL(nfs_readhdr_free); -void nfs_readdata_release(struct nfs_pgio_data *rdata) -{ - struct nfs_pgio_header *hdr = rdata->header; - struct nfs_rw_header *read_header = container_of(hdr, struct nfs_rw_header, header); - - put_nfs_open_context(rdata->args.context); - if (rdata->pages.pagevec != rdata->pages.page_array) - kfree(rdata->pages.pagevec); - if (rdata == &read_header->rpc_data) { - rdata->header = NULL; - rdata = NULL; - } - if (atomic_dec_and_test(&hdr->refcnt)) - hdr->completion_ops->completion(hdr); - /* Note: we only free the rpc_task after callbacks are done. - * See the comment in rpc_free_task() for why - */ - kfree(rdata); -} -EXPORT_SYMBOL_GPL(nfs_readdata_release); - static int nfs_return_empty_page(struct page *page) { @@ -327,7 +281,7 @@ static void nfs_pagein_error(struct nfs_pageio_descriptor *desc, struct nfs_pgio_data *data = list_first_entry(&hdr->rpc_list, struct nfs_pgio_data, list); list_del(&data->list); - nfs_readdata_release(data); + nfs_pgio_data_release(data); } desc->pg_completion_ops->error_cleanup(&desc->pg_list); } @@ -359,7 +313,7 @@ static int nfs_pagein_multi(struct nfs_pageio_descriptor *desc, do { size_t len = min(nbytes,rsize); - data = nfs_readdata_alloc(hdr, 1); + data = nfs_pgio_data_alloc(hdr, 1); if (!data) { nfs_pagein_error(desc, hdr); return -ENOMEM; @@ -385,7 +339,7 @@ static int nfs_pagein_one(struct nfs_pageio_descriptor *desc, struct nfs_pgio_data *data; struct list_head *head = &desc->pg_list; - data = nfs_readdata_alloc(hdr, nfs_page_array_len(desc->pg_base, + data = nfs_pgio_data_alloc(hdr, nfs_page_array_len(desc->pg_base, desc->pg_count)); if (!data) { nfs_pagein_error(desc, hdr); @@ -515,7 +469,7 @@ static void nfs_readpage_result_common(struct rpc_task *task, void *calldata) static void nfs_readpage_release_common(void *calldata) { - nfs_readdata_release(calldata); + nfs_pgio_data_release(calldata); } void nfs_read_prepare(struct rpc_task *task, void *calldata) diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 321a791c72bf..0dc4d6a28bd0 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -87,31 +87,6 @@ struct nfs_rw_header *nfs_writehdr_alloc(void) } EXPORT_SYMBOL_GPL(nfs_writehdr_alloc); -static struct nfs_pgio_data *nfs_writedata_alloc(struct nfs_pgio_header *hdr, - unsigned int pagecount) -{ - struct nfs_pgio_data *data, *prealloc; - - prealloc = &container_of(hdr, struct nfs_rw_header, header)->rpc_data; - if (prealloc->header == NULL) - data = prealloc; - else - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (!data) - goto out; - - if (nfs_pgarray_set(&data->pages, pagecount)) { - data->header = hdr; - atomic_inc(&hdr->refcnt); - } else { - if (data != prealloc) - kfree(data); - data = NULL; - } -out: - return data; -} - void nfs_writehdr_free(struct nfs_pgio_header *hdr) { struct nfs_rw_header *whdr = container_of(hdr, struct nfs_rw_header, header); @@ -119,27 +94,6 @@ void nfs_writehdr_free(struct nfs_pgio_header *hdr) } EXPORT_SYMBOL_GPL(nfs_writehdr_free); -void nfs_writedata_release(struct nfs_pgio_data *wdata) -{ - struct nfs_pgio_header *hdr = wdata->header; - struct nfs_rw_header *write_header = container_of(hdr, struct nfs_rw_header, header); - - put_nfs_open_context(wdata->args.context); - if (wdata->pages.pagevec != wdata->pages.page_array) - kfree(wdata->pages.pagevec); - if (wdata == &write_header->rpc_data) { - wdata->header = NULL; - wdata = NULL; - } - if (atomic_dec_and_test(&hdr->refcnt)) - hdr->completion_ops->completion(hdr); - /* Note: we only free the rpc_task after callbacks are done. - * See the comment in rpc_free_task() for why - */ - kfree(wdata); -} -EXPORT_SYMBOL_GPL(nfs_writedata_release); - static void nfs_context_set_write_error(struct nfs_open_context *ctx, int error) { ctx->error = error; @@ -1146,7 +1100,7 @@ static void nfs_flush_error(struct nfs_pageio_descriptor *desc, struct nfs_pgio_data *data = list_first_entry(&hdr->rpc_list, struct nfs_pgio_data, list); list_del(&data->list); - nfs_writedata_release(data); + nfs_pgio_data_release(data); } desc->pg_completion_ops->error_cleanup(&desc->pg_list); } @@ -1179,7 +1133,7 @@ static int nfs_flush_multi(struct nfs_pageio_descriptor *desc, do { size_t len = min(nbytes, wsize); - data = nfs_writedata_alloc(hdr, 1); + data = nfs_pgio_data_alloc(hdr, 1); if (!data) { nfs_flush_error(desc, hdr); return -ENOMEM; @@ -1214,7 +1168,7 @@ static int nfs_flush_one(struct nfs_pageio_descriptor *desc, struct list_head *head = &desc->pg_list; struct nfs_commit_info cinfo; - data = nfs_writedata_alloc(hdr, nfs_page_array_len(desc->pg_base, + data = nfs_pgio_data_alloc(hdr, nfs_page_array_len(desc->pg_base, desc->pg_count)); if (!data) { nfs_flush_error(desc, hdr); @@ -1348,7 +1302,7 @@ static void nfs_writeback_release_common(void *calldata) set_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags); spin_unlock(&hdr->lock); } - nfs_writedata_release(data); + nfs_pgio_data_release(data); } static const struct rpc_call_ops nfs_write_common_ops = { -- 2.20.1