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author | Maxim Patlasov <mpatlasov@parallels.com> | 2012-10-26 19:49:24 +0400 |
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committer | Miklos Szeredi <mszeredi@suse.cz> | 2013-01-24 16:21:27 +0100 |
commit | b2430d7567a376b3685627ca7e9d712f6f27d49b (patch) | |
tree | 2c59795b27e57f6a0a6c15d0f8aea3aac32f8317 /fs/fuse/dev.c | |
parent | 54b966702dafe396b6f4e609f222b8e0fdb4d7a4 (diff) | |
download | linux-b2430d7567a376b3685627ca7e9d712f6f27d49b.tar.gz linux-b2430d7567a376b3685627ca7e9d712f6f27d49b.tar.bz2 linux-b2430d7567a376b3685627ca7e9d712f6f27d49b.zip |
fuse: add per-page descriptor <offset, length> to fuse_req
The ability to save page pointers along with lengths and offsets in fuse_req
will be useful to cover several iovec-s with a single fuse_req.
Per-request page_offset is removed because anybody who need it can use
req->page_descs[0].offset instead.
Signed-off-by: Maxim Patlasov <mpatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Diffstat (limited to 'fs/fuse/dev.c')
-rw-r--r-- | fs/fuse/dev.c | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index 28d9792de4a2..db4af8f3886a 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -35,15 +35,18 @@ static struct fuse_conn *fuse_get_conn(struct file *file) } static void fuse_request_init(struct fuse_req *req, struct page **pages, + struct fuse_page_desc *page_descs, unsigned npages) { memset(req, 0, sizeof(*req)); memset(pages, 0, sizeof(*pages) * npages); + memset(page_descs, 0, sizeof(*page_descs) * npages); INIT_LIST_HEAD(&req->list); INIT_LIST_HEAD(&req->intr_entry); init_waitqueue_head(&req->waitq); atomic_set(&req->count, 1); req->pages = pages; + req->page_descs = page_descs; req->max_pages = npages; } @@ -52,18 +55,25 @@ static struct fuse_req *__fuse_request_alloc(unsigned npages, gfp_t flags) struct fuse_req *req = kmem_cache_alloc(fuse_req_cachep, flags); if (req) { struct page **pages; + struct fuse_page_desc *page_descs; - if (npages <= FUSE_REQ_INLINE_PAGES) + if (npages <= FUSE_REQ_INLINE_PAGES) { pages = req->inline_pages; - else + page_descs = req->inline_page_descs; + } else { pages = kmalloc(sizeof(struct page *) * npages, flags); + page_descs = kmalloc(sizeof(struct fuse_page_desc) * + npages, flags); + } - if (!pages) { + if (!pages || !page_descs) { + kfree(pages); + kfree(page_descs); kmem_cache_free(fuse_req_cachep, req); return NULL; } - fuse_request_init(req, pages, npages); + fuse_request_init(req, pages, page_descs, npages); } return req; } @@ -81,8 +91,10 @@ struct fuse_req *fuse_request_alloc_nofs(unsigned npages) void fuse_request_free(struct fuse_req *req) { - if (req->pages != req->inline_pages) + if (req->pages != req->inline_pages) { kfree(req->pages); + kfree(req->page_descs); + } kmem_cache_free(fuse_req_cachep, req); } @@ -186,7 +198,7 @@ static void put_reserved_req(struct fuse_conn *fc, struct fuse_req *req) struct fuse_file *ff = file->private_data; spin_lock(&fc->lock); - fuse_request_init(req, req->pages, req->max_pages); + fuse_request_init(req, req->pages, req->page_descs, req->max_pages); BUG_ON(ff->reserved_req); ff->reserved_req = req; wake_up_all(&fc->reserved_req_waitq); @@ -891,7 +903,7 @@ static int fuse_copy_pages(struct fuse_copy_state *cs, unsigned nbytes, { unsigned i; struct fuse_req *req = cs->req; - unsigned offset = req->page_offset; + unsigned offset = req->page_descs[0].offset; unsigned count = min(nbytes, (unsigned) PAGE_SIZE - offset); for (i = 0; i < req->num_pages && (nbytes || zeroing); i++) { @@ -1599,7 +1611,7 @@ static int fuse_retrieve(struct fuse_conn *fc, struct inode *inode, req->in.h.nodeid = outarg->nodeid; req->in.numargs = 2; req->in.argpages = 1; - req->page_offset = offset; + req->page_descs[0].offset = offset; req->end = fuse_retrieve_end; index = outarg->offset >> PAGE_CACHE_SHIFT; |