X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=filesetup.c;h=84cd7f7dfe2bffa93ed62d3ea7aaa790cd6e02b3;hp=7ea5714a18b6e47cb6422d18a557c57ddbf2bef0;hb=e916b390684ec1ca6247f98138fa9c1682701d29;hpb=0ab8db8943acc6b9ea778735563bfad2a79e8ddd

diff --git a/filesetup.c b/filesetup.c
index 7ea5714a..84cd7f7d 100644
--- a/filesetup.c
+++ b/filesetup.c
@@ -8,25 +8,31 @@
 #include "fio.h"
 #include "os.h"
 
+/*
+ * Check if the file exists and it's large enough.
+ */
+static int file_ok(struct thread_data *td, struct fio_file *f)
+{
+	struct stat st;
+
+	if (td->filetype != FIO_TYPE_FILE || (td->io_ops->flags & FIO_NULLIO))
+		return 0;
+
+	if (stat(f->file_name, &st) == -1)
+		return 1;
+	else if (st.st_size < (off_t) f->file_size)
+		return 1;
+
+	return 0;
+}
+
 static int create_file(struct thread_data *td, struct fio_file *f)
 {
 	unsigned long long left;
 	unsigned int bs;
-	struct stat st;
 	char *b;
 	int r;
 
-	if (td->filetype != FIO_TYPE_FILE)
-		return 0;
-
-	if (stat(f->file_name, &st) == -1) {
-		if (!td->create_file) {
-			td_verror(td, ENOENT);
-			return 1;
-		}
-	} else if (st.st_size >= (off_t) f->file_size)
-		return 0;
-
 	f->fd = open(f->file_name, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 	if (f->fd < 0) {
 		td_verror(td, errno);
@@ -38,12 +44,17 @@ static int create_file(struct thread_data *td, struct fio_file *f)
 		goto err;
 	}
 
-	b = malloc(td->max_bs);
-	memset(b, 0, td->max_bs);
+	if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
+		td_verror(td, errno);
+		goto err;
+	}
+
+	b = malloc(td->max_bs[DDIR_WRITE]);
+	memset(b, 0, td->max_bs[DDIR_WRITE]);
 
 	left = f->file_size;
 	while (left && !td->terminate) {
-		bs = td->max_bs;
+		bs = td->max_bs[DDIR_WRITE];
 		if (bs > left)
 			bs = left;
 
@@ -80,19 +91,35 @@ err:
 static int create_files(struct thread_data *td)
 {
 	struct fio_file *f;
-	int i, err;
+	int i, err, need_create;
+
+	for_each_file(td, f, i)
+		f->file_size = td->total_file_size / td->nr_files;
 
 	/*
 	 * unless specifically asked for overwrite, let normal io extend it
 	 */
-	if (!td->overwrite) {
-		td->io_size = td->total_file_size;
-		for_each_file(td, f, i)
-			f->file_size = td->total_file_size / td->nr_files;
-
+	if (!td->overwrite)
 		return 0;
+
+	need_create = 0;
+	if (td->filetype == FIO_TYPE_FILE) {
+		for_each_file(td, f, i) {
+			int file_there = !file_ok(td, f);
+
+			if (file_there && td->ddir == DDIR_WRITE &&
+			    !td->overwrite) {
+				unlink(f->file_name);
+				file_there = 0;
+			}
+
+			need_create += !file_there;
+		}
 	}
 
+	if (!need_create)
+		return 0;
+
 	if (!td->total_file_size) {
 		log_err("Need size for create\n");
 		td_verror(td, EINVAL);
@@ -100,17 +127,23 @@ static int create_files(struct thread_data *td)
 	}
 
 	temp_stall_ts = 1;
-	fprintf(f_out, "%s: Laying out IO file(s) (%LuMiB)\n",
-					td->name, td->total_file_size >> 20);
+	fprintf(f_out, "%s: Laying out IO file(s) (%u x %LuMiB == %LuMiB)\n",
+				td->name, td->nr_uniq_files,
+				(td->total_file_size >> 20) / td->nr_uniq_files,
+				td->total_file_size >> 20);
 
 	err = 0;
 	for_each_file(td, f, i) {
-		f->file_size = td->total_file_size / td->nr_files;
-		err = create_file(td, f);
-		if (err)
-			break;
-
-		td->io_size += f->file_size;
+		/*
+		 * Only unlink files that we created.
+		 */
+		f->unlink = 0;
+		if (file_ok(td, f)) {
+			f->unlink = td->unlink;
+			err = create_file(td, f);
+			if (err)
+				break;
+		}
 	}
 
 	temp_stall_ts = 0;
@@ -121,6 +154,16 @@ static int file_size(struct thread_data *td, struct fio_file *f)
 {
 	struct stat st;
 
+	/*
+	 * if we are not doing real io, just pretend the file is as large
+	 * as the size= given. this works fine with nrfiles > 1 as well,
+	 * we only really care about it being at least as big as size=
+	 */
+	if (td->io_ops->flags & FIO_NULLIO) {
+		f->real_file_size = f->file_size = td->total_file_size;
+		return 0;
+	}
+
 	if (td->overwrite) {
 		if (fstat(f->fd, &st) == -1) {
 			td_verror(td, errno);
@@ -131,9 +174,9 @@ static int file_size(struct thread_data *td, struct fio_file *f)
 
 		if (!f->file_size || f->file_size > f->real_file_size)
 			f->file_size = f->real_file_size;
-	}
+	} else
+		f->real_file_size = f->file_size;
 
-	f->file_size -= f->file_offset;
 	return 0;
 }
 
@@ -179,7 +222,30 @@ static int get_file_size(struct thread_data *td, struct fio_file *f)
 		return 1;
 	}
 
-	td->io_size += f->file_size;
+	return 0;
+}
+
+int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
+{
+	int ret = 0;
+
+	/*
+	 * FIXME: add blockdev flushing too
+	 */
+	if (td->io_ops->flags & FIO_MMAPIO)
+		ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
+	else if (td->filetype == FIO_TYPE_FILE)
+		ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
+	else if (td->filetype == FIO_TYPE_BD)
+		ret = blockdev_invalidate_cache(f->fd);
+	else if (td->filetype == FIO_TYPE_CHAR)
+		ret = 0;
+
+	if (ret < 0) {
+		td_verror(td, errno);
+		return 1;
+	}
+
 	return 0;
 }
 
@@ -204,12 +270,8 @@ static int __setup_file_mmap(struct thread_data *td, struct fio_file *f)
 		return 1;
 	}
 
-	if (td->invalidate_cache) {
-		if (madvise(f->mmap, f->file_size, MADV_DONTNEED) < 0) {
-			td_verror(td, errno);
-			return 1;
-		}
-	}
+	if (td->invalidate_cache && file_invalidate_cache(td, f))
+		return 1;
 
 	if (td->sequential) {
 		if (madvise(f->mmap, f->file_size, MADV_SEQUENTIAL) < 0) {
@@ -242,12 +304,8 @@ static int setup_files_mmap(struct thread_data *td)
 
 static int __setup_file_plain(struct thread_data *td, struct fio_file *f)
 {
-	if (td->invalidate_cache) {
-		if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED) < 0) {
-			td_verror(td, errno);
-			return 1;
-		}
-	}
+	if (td->invalidate_cache && file_invalidate_cache(td, f))
+		return 1;
 
 	if (td->sequential) {
 		if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
@@ -282,29 +340,40 @@ static int setup_file(struct thread_data *td, struct fio_file *f)
 {
 	int flags = 0;
 
-	if (td->odirect)
-		flags |= OS_O_DIRECT;
-
-	if (td_write(td) || td_rw(td)) {
-		if (td->filetype == FIO_TYPE_FILE) {
-			if (!td->overwrite)
-				flags |= O_TRUNC;
+	if (td->io_ops->flags & FIO_NETIO)
+		return 0;
 
-			flags |= O_CREAT;
-		}
+	/*
+	 * we need a valid file descriptor, but don't create a real file.
+	 * lets just dup stdout, seems like a sensible approach.
+	 */
+	if (td->io_ops->flags & FIO_NULLIO)
+		f->fd = dup(STDOUT_FILENO);
+	else {
+		if (td->odirect)
+			flags |= OS_O_DIRECT;
 		if (td->sync_io)
 			flags |= O_SYNC;
 
-		flags |= O_RDWR;
-
-		f->fd = open(f->file_name, flags, 0600);
-	} else {
-		if (td->filetype == FIO_TYPE_CHAR)
+		if (td_write(td) || td_rw(td)) {
 			flags |= O_RDWR;
-		else
-			flags |= O_RDONLY;
 
-		f->fd = open(f->file_name, flags);
+			if (td->filetype == FIO_TYPE_FILE) {
+				if (!td->overwrite)
+					flags |= O_TRUNC;
+
+				flags |= O_CREAT;
+			}
+
+			f->fd = open(f->file_name, flags, 0600);
+		} else {
+			if (td->filetype == FIO_TYPE_CHAR)
+				flags |= O_RDWR;
+			else
+				flags |= O_RDONLY;
+
+			f->fd = open(f->file_name, flags);
+		}
 	}
 
 	if (f->fd == -1) {
@@ -318,10 +387,34 @@ static int setup_file(struct thread_data *td, struct fio_file *f)
 	return 0;
 }
 
+int open_files(struct thread_data *td)
+{
+	struct fio_file *f;
+	int i, err = 0;
+
+	for_each_file(td, f, i) {
+		err = setup_file(td, f);
+		if (err)
+			break;
+	}
+
+	if (!err)
+		return 0;
+
+	for_each_file(td, f, i) {
+		if (f->fd != -1) {
+			close(f->fd);
+			f->fd = -1;
+		}
+	}
+
+	return err;
+}
+
 int setup_files(struct thread_data *td)
 {
 	struct fio_file *f;
-	int i, err;
+	int err, i;
 
 	/*
 	 * if ioengine defines a setup() method, it's responsible for
@@ -333,12 +426,18 @@ int setup_files(struct thread_data *td)
 	if (create_files(td))
 		return 1;
 
-	for_each_file(td, f, i) {
-		err = setup_file(td, f);
-		if (err)
-			break;
-	}
+	err = open_files(td);
+	if (err)
+		return err;
 
+	/*
+	 * Recalculate the total file size now that files are set up.
+	 */
+	td->total_file_size = 0;
+	for_each_file(td, f, i)
+		td->total_file_size += f->file_size;
+
+	td->io_size = td->total_file_size;
 	if (td->io_size == 0) {
 		log_err("%s: no io blocks\n", td->name);
 		td_verror(td, EINVAL);
@@ -351,9 +450,18 @@ int setup_files(struct thread_data *td)
 	td->total_io_size = td->io_size * td->loops;
 
 	if (td->io_ops->flags & FIO_MMAPIO)
-		return setup_files_mmap(td);
+		err = setup_files_mmap(td);
 	else
-		return setup_files_plain(td);
+		err = setup_files_plain(td);
+
+	for_each_file(td, f, i) {
+		if (f->fd != -1) {
+			close(f->fd);
+			f->fd = -1;
+		}
+	}
+
+	return err;
 }
 
 void close_files(struct thread_data *td)
@@ -362,9 +470,13 @@ void close_files(struct thread_data *td)
 	int i;
 
 	for_each_file(td, f, i) {
+		if (!td->filename && f->unlink &&
+		    td->filetype == FIO_TYPE_FILE) {
+			unlink(f->file_name);
+			free(f->file_name);
+			f->file_name = NULL;
+		}
 		if (f->fd != -1) {
-			if (td->unlink && td->filetype == FIO_TYPE_FILE)
-				unlink(f->file_name);
 			close(f->fd);
 			f->fd = -1;
 		}
@@ -373,4 +485,9 @@ void close_files(struct thread_data *td)
 			f->mmap = NULL;
 		}
 	}
+
+	td->filename = NULL;
+	free(td->files);
+	td->files = NULL;
+	td->nr_files = 0;
 }