Fixup for a minor 0 byte file size case

[fio.git] / filesetup.c

diff --git a/filesetup.c b/filesetup.c
index 793b08d07549c895944f406e7afcdb7d7765e840..9388bfc94b419e54e670b7410affda94c97ef9ea 100644 (file)
--- a/filesetup.c
+++ b/filesetup.c
@@ -377,12 +377,8 @@ static int get_file_size(struct thread_data *td, struct fio_file *f)
                ret = bdev_size(td, f);
        else if (f->filetype == FIO_TYPE_CHAR)
                ret = char_size(td, f);
-       else {
-               f->real_file_size = -1;
-               log_info("%s: failed to get file size of %s\n", td->o.name,
-                                       f->file_name);
-               return 1; /* avoid offset extends end error message */
-       }
+       else
+               f->real_file_size = -1ULL;
 
        /*
         * Leave ->real_file_size with 0 since it could be expectation
@@ -391,11 +387,23 @@ static int get_file_size(struct thread_data *td, struct fio_file *f)
        if (ret)
                return ret;
 
+       /*
+        * If ->real_file_size is -1, a conditional for the message
+        * "offset extends end" is always true, but it makes no sense,
+        * so just return the same value here.
+        */
+       if (f->real_file_size == -1ULL) {
+               log_info("%s: failed to get file size of %s\n", td->o.name,
+                                       f->file_name);
+               return 1;
+       }
+
+       if (td->o.start_offset && f->file_offset == 0)
+               dprint(FD_FILE, "offset of file %s not initialized yet\n",
+                                       f->file_name);
        /*
         * ->file_offset normally hasn't been initialized yet, so this
-        * is basically always false unless ->real_file_size is -1, but
-        * if ->real_file_size is -1 this message doesn't make sense.
-        * As a result, this message is basically useless.
+        * is basically always false.
         */
        if (f->file_offset > f->real_file_size) {
                log_err("%s: offset extends end (%llu > %llu)\n", td->o.name,
@@ -685,7 +693,7 @@ static int get_file_sizes(struct thread_data *td)
        int err = 0;
 
        for_each_file(td, f, i) {
-               dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
+               dprint(FD_FILE, "get file size for %p/%d/%s\n", f, i,
                                                                f->file_name);
 
                if (td_io_get_file_size(td, f)) {
@@ -896,8 +904,7 @@ int setup_files(struct thread_data *td)
                if (!o->file_size_low) {
                        /*
                         * no file size or range given, file size is equal to
-                        * total size divided by number of files. If that is
-                        * zero, set it to the real file size. If the size
+                        * total size divided by number of files. If the size
                         * doesn't divide nicely with the min blocksize,
                         * make the first files bigger.
                         */
@@ -907,8 +914,24 @@ int setup_files(struct thread_data *td)
                                f->io_size += bs;
                        }
 
-                       if (!f->io_size)
+                       /*
+                        * We normally don't come here, but if the result is 0,
+                        * set it to the real file size. This could be size of
+                        * the existing one if it already exists, but otherwise
+                        * will be set to 0. A new file won't be created because
+                        * ->io_size + ->file_offset equals ->real_file_size.
+                        */
+                       if (!f->io_size) {
+                               if (f->file_offset > f->real_file_size)
+                                       goto err_offset;
                                f->io_size = f->real_file_size - f->file_offset;
+                               log_info("fio: forcing file %s size to %llu\n",
+                                       f->file_name,
+                                       (unsigned long long)f->io_size);
+                               if (!f->io_size)
+                                       log_info("fio: file %s may be ignored\n",
+                                               f->file_name);
+                       }
                } else if (f->real_file_size < o->file_size_low ||
                           f->real_file_size > o->file_size_high) {
                        if (f->file_offset > o->file_size_low)