diff options
Diffstat (limited to 'fs/nfs/pagelist.c')
| -rw-r--r-- | fs/nfs/pagelist.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index dd99a5d381b3..7a622263a9fc 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -542,6 +542,36 @@ nfs_create_request(struct nfs_open_context *ctx, struct page *page, return ret; } +/** + * nfs_page_create_from_folio - Create an NFS read/write request. + * @ctx: open context to use + * @folio: folio to write + * @offset: starting offset within the folio for the write + * @count: number of bytes to read/write + * + * The page must be locked by the caller. This makes sure we never + * create two different requests for the same page. + * User should ensure it is safe to sleep in this function. + */ +struct nfs_page *nfs_page_create_from_folio(struct nfs_open_context *ctx, + struct folio *folio, + unsigned int offset, + unsigned int count) +{ + struct nfs_lock_context *l_ctx = nfs_get_lock_context(ctx); + struct nfs_page *ret; + + if (IS_ERR(l_ctx)) + return ERR_CAST(l_ctx); + ret = nfs_page_create(l_ctx, offset, folio_index(folio), offset, count); + if (!IS_ERR(ret)) { + nfs_page_assign_folio(ret, folio); + nfs_page_group_init(ret, NULL); + } + nfs_put_lock_context(l_ctx); + return ret; +} + static struct nfs_page * nfs_create_subreq(struct nfs_page *req, unsigned int pgbase, |