From: Trond Myklebust Date: Tue, 5 Dec 2006 00:35:40 -0500 NFS: Remove nfs_writepage_sync() Maintaining two parallel ways of doing synchronous writes is rather pointless. This patch gets rid of the legacy nfs_writepage_sync(), and replaces it with the faster asynchronous writes. Signed-off-by: Trond Myklebust --- fs/nfs/file.c | 6 +++ fs/nfs/nfs3proc.c | 47 ---------------------- fs/nfs/nfs4proc.c | 85 ---------------------------------------- fs/nfs/proc.c | 28 ------------- fs/nfs/write.c | 100 ++--------------------------------------------- include/linux/nfs_xdr.h | 2 - 6 files changed, 10 insertions(+), 258 deletions(-) diff --git a/fs/nfs/file.c b/fs/nfs/file.c index d6ee60f..143a190 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -378,6 +378,12 @@ #endif nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, count); result = generic_file_aio_write(iocb, iov, nr_segs, pos); + /* Return error values for O_SYNC and IS_SYNC() */ + if (result >= 0 && (IS_SYNC(inode) || (iocb->ki_filp->f_flags & O_SYNC))) { + int err = nfs_fsync(iocb->ki_filp, dentry, 1); + if (err < 0) + result = err; + } out: return result; diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c index 7fba063..510ae52 100644 --- a/fs/nfs/nfs3proc.c +++ b/fs/nfs/nfs3proc.c @@ -276,51 +276,6 @@ static int nfs3_proc_read(struct nfs_rea return status; } -static int nfs3_proc_write(struct nfs_write_data *wdata) -{ - int rpcflags = wdata->flags; - struct inode * inode = wdata->inode; - struct nfs_fattr * fattr = wdata->res.fattr; - struct rpc_message msg = { - .rpc_proc = &nfs3_procedures[NFS3PROC_WRITE], - .rpc_argp = &wdata->args, - .rpc_resp = &wdata->res, - .rpc_cred = wdata->cred, - }; - int status; - - dprintk("NFS call write %d @ %Ld\n", wdata->args.count, - (long long) wdata->args.offset); - nfs_fattr_init(fattr); - status = rpc_call_sync(NFS_CLIENT(inode), &msg, rpcflags); - if (status >= 0) - nfs_post_op_update_inode(inode, fattr); - dprintk("NFS reply write: %d\n", status); - return status < 0? status : wdata->res.count; -} - -static int nfs3_proc_commit(struct nfs_write_data *cdata) -{ - struct inode * inode = cdata->inode; - struct nfs_fattr * fattr = cdata->res.fattr; - struct rpc_message msg = { - .rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT], - .rpc_argp = &cdata->args, - .rpc_resp = &cdata->res, - .rpc_cred = cdata->cred, - }; - int status; - - dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, - (long long) cdata->args.offset); - nfs_fattr_init(fattr); - status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); - if (status >= 0) - nfs_post_op_update_inode(inode, fattr); - dprintk("NFS reply commit: %d\n", status); - return status; -} - /* * Create a regular file. * For now, we don't implement O_EXCL. @@ -901,8 +856,6 @@ const struct nfs_rpc_ops nfs_v3_clientop .access = nfs3_proc_access, .readlink = nfs3_proc_readlink, .read = nfs3_proc_read, - .write = nfs3_proc_write, - .commit = nfs3_proc_commit, .create = nfs3_proc_create, .remove = nfs3_proc_remove, .unlink_setup = nfs3_proc_unlink_setup, diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 4b5fc71..ee458ae 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -1775,89 +1775,6 @@ static int nfs4_proc_read(struct nfs_rea return err; } -static int _nfs4_proc_write(struct nfs_write_data *wdata) -{ - int rpcflags = wdata->flags; - struct inode *inode = wdata->inode; - struct nfs_fattr *fattr = wdata->res.fattr; - struct nfs_server *server = NFS_SERVER(inode); - struct rpc_message msg = { - .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], - .rpc_argp = &wdata->args, - .rpc_resp = &wdata->res, - .rpc_cred = wdata->cred, - }; - int status; - - dprintk("NFS call write %d @ %Ld\n", wdata->args.count, - (long long) wdata->args.offset); - - wdata->args.bitmask = server->attr_bitmask; - wdata->res.server = server; - wdata->timestamp = jiffies; - nfs_fattr_init(fattr); - status = rpc_call_sync(server->client, &msg, rpcflags); - dprintk("NFS reply write: %d\n", status); - if (status < 0) - return status; - renew_lease(server, wdata->timestamp); - nfs_post_op_update_inode(inode, fattr); - return wdata->res.count; -} - -static int nfs4_proc_write(struct nfs_write_data *wdata) -{ - struct nfs4_exception exception = { }; - int err; - do { - err = nfs4_handle_exception(NFS_SERVER(wdata->inode), - _nfs4_proc_write(wdata), - &exception); - } while (exception.retry); - return err; -} - -static int _nfs4_proc_commit(struct nfs_write_data *cdata) -{ - struct inode *inode = cdata->inode; - struct nfs_fattr *fattr = cdata->res.fattr; - struct nfs_server *server = NFS_SERVER(inode); - struct rpc_message msg = { - .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], - .rpc_argp = &cdata->args, - .rpc_resp = &cdata->res, - .rpc_cred = cdata->cred, - }; - int status; - - dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, - (long long) cdata->args.offset); - - cdata->args.bitmask = server->attr_bitmask; - cdata->res.server = server; - cdata->timestamp = jiffies; - nfs_fattr_init(fattr); - status = rpc_call_sync(server->client, &msg, 0); - if (status >= 0) - renew_lease(server, cdata->timestamp); - dprintk("NFS reply commit: %d\n", status); - if (status >= 0) - nfs_post_op_update_inode(inode, fattr); - return status; -} - -static int nfs4_proc_commit(struct nfs_write_data *cdata) -{ - struct nfs4_exception exception = { }; - int err; - do { - err = nfs4_handle_exception(NFS_SERVER(cdata->inode), - _nfs4_proc_commit(cdata), - &exception); - } while (exception.retry); - return err; -} - /* * Got race? * We will need to arrange for the VFS layer to provide an atomic open. @@ -3730,8 +3647,6 @@ const struct nfs_rpc_ops nfs_v4_clientop .access = nfs4_proc_access, .readlink = nfs4_proc_readlink, .read = nfs4_proc_read, - .write = nfs4_proc_write, - .commit = nfs4_proc_commit, .create = nfs4_proc_create, .remove = nfs4_proc_remove, .unlink_setup = nfs4_proc_unlink_setup, diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c index 7a9013d..10f5e80 100644 --- a/fs/nfs/proc.c +++ b/fs/nfs/proc.c @@ -215,32 +215,6 @@ static int nfs_proc_read(struct nfs_read return status; } -static int nfs_proc_write(struct nfs_write_data *wdata) -{ - int flags = wdata->flags; - struct inode * inode = wdata->inode; - struct nfs_fattr * fattr = wdata->res.fattr; - struct rpc_message msg = { - .rpc_proc = &nfs_procedures[NFSPROC_WRITE], - .rpc_argp = &wdata->args, - .rpc_resp = &wdata->res, - .rpc_cred = wdata->cred, - }; - int status; - - dprintk("NFS call write %d @ %Ld\n", wdata->args.count, - (long long) wdata->args.offset); - nfs_fattr_init(fattr); - status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); - if (status >= 0) { - nfs_post_op_update_inode(inode, fattr); - wdata->res.count = wdata->args.count; - wdata->verf.committed = NFS_FILE_SYNC; - } - dprintk("NFS reply write: %d\n", status); - return status < 0? status : wdata->res.count; -} - static int nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, int flags, struct nameidata *nd) @@ -693,8 +667,6 @@ const struct nfs_rpc_ops nfs_v2_clientop .access = NULL, /* access */ .readlink = nfs_proc_readlink, .read = nfs_proc_read, - .write = nfs_proc_write, - .commit = NULL, /* commit */ .create = nfs_proc_create, .remove = nfs_proc_remove, .unlink_setup = nfs_proc_unlink_setup, diff --git a/fs/nfs/write.c b/fs/nfs/write.c index de9a16a..f0720b5 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -210,78 +210,6 @@ static void nfs_mark_uptodate(struct pag SetPageUptodate(page); } -/* - * Write a page synchronously. - * Offset is the data offset within the page. - */ -static int nfs_writepage_sync(struct nfs_open_context *ctx, struct page *page, - unsigned int offset, unsigned int count, int how) -{ - struct inode *inode = page->mapping->host; - unsigned int wsize = NFS_SERVER(inode)->wsize; - int result, written = 0; - struct nfs_write_data *wdata; - - wdata = nfs_writedata_alloc(wsize); - if (!wdata) - return -ENOMEM; - - wdata->flags = how; - wdata->cred = ctx->cred; - wdata->inode = inode; - wdata->args.fh = NFS_FH(inode); - wdata->args.context = ctx; - wdata->args.pages = &page; - wdata->args.stable = NFS_FILE_SYNC; - wdata->args.pgbase = offset; - wdata->args.count = wsize; - wdata->res.fattr = &wdata->fattr; - wdata->res.verf = &wdata->verf; - - dprintk("NFS: nfs_writepage_sync(%s/%Ld %d@%Ld)\n", - inode->i_sb->s_id, - (long long)NFS_FILEID(inode), - count, (long long)(page_offset(page) + offset)); - - set_page_writeback(page); - nfs_begin_data_update(inode); - do { - if (count < wsize) - wdata->args.count = count; - wdata->args.offset = page_offset(page) + wdata->args.pgbase; - - result = NFS_PROTO(inode)->write(wdata); - - if (result < 0) { - /* Must mark the page invalid after I/O error */ - ClearPageUptodate(page); - goto io_error; - } - if (result < wdata->args.count) - printk(KERN_WARNING "NFS: short write, count=%u, result=%d\n", - wdata->args.count, result); - - wdata->args.offset += result; - wdata->args.pgbase += result; - written += result; - count -= result; - nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, result); - } while (count); - /* Update file length */ - nfs_grow_file(page, offset, written); - /* Set the PG_uptodate flag? */ - nfs_mark_uptodate(page, offset, written); - - if (PageError(page)) - ClearPageError(page); - -io_error: - nfs_end_data_update(inode); - end_page_writeback(page); - nfs_writedata_release(wdata); - return written ? written : result; -} - static int nfs_writepage_setup(struct nfs_open_context *ctx, struct page *page, unsigned int offset, unsigned int count) { @@ -342,22 +270,12 @@ int nfs_writepage(struct page *page, str err = -EBADF; goto out; } - lock_kernel(); - if (!IS_SYNC(inode)) { - err = nfs_writepage_setup(ctx, page, 0, offset); - if (!wbc->for_writepages) - nfs_flush_mapping(page->mapping, wbc, wb_priority(wbc)); - } else { - err = nfs_writepage_sync(ctx, page, 0, offset, wb_priority(wbc)); - if (err >= 0) { - if (err != offset) - redirty_page_for_writepage(wbc, page); - err = 0; - } - } - unlock_kernel(); + err = nfs_writepage_setup(ctx, page, 0, offset); put_nfs_open_context(ctx); + out: + if (!wbc->for_writepages) + nfs_flush_mapping(page->mapping, wbc, wb_priority(wbc)); unlock_page(page); return err; } @@ -777,16 +695,6 @@ int nfs_updatepage(struct file *file, st file->f_dentry->d_name.name, count, (long long)(page_offset(page) +offset)); - if (IS_SYNC(inode)) { - status = nfs_writepage_sync(ctx, page, offset, count, 0); - if (status > 0) { - if (offset == 0 && status == PAGE_CACHE_SIZE) - SetPageUptodate(page); - return 0; - } - return status; - } - /* If we're not using byte range locks, and we know the page * is entirely in cache, it may be more efficient to avoid * fragmenting write requests. diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 768c1ad..9ee9da5 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -785,8 +785,6 @@ struct nfs_rpc_ops { int (*readlink)(struct inode *, struct page *, unsigned int, unsigned int); int (*read) (struct nfs_read_data *); - int (*write) (struct nfs_write_data *); - int (*commit) (struct nfs_write_data *); int (*create) (struct inode *, struct dentry *, struct iattr *, int, struct nameidata *); int (*remove) (struct inode *, struct qstr *);