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[PATCH] uml ubd driver: var renames
Rename the ubd_dev array to ubd_devs and then call any "struct ubd" ubd_dev instead of dev, which doesn't make clear what we're treating (and no, it's not hungarian notation - not any more than calling all vm_area_struct vma or all inodes inode). Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paolo 'Blaisorblade' Giarrusso
Linus Torvalds
parent
2a9d32f682
commit
7d314e346d
@ -195,14 +195,14 @@ struct ubd {
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.cow = DEFAULT_COW, \
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}
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struct ubd ubd_dev[MAX_DEV] = { [ 0 ... MAX_DEV - 1 ] = DEFAULT_UBD };
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struct ubd ubd_devs[MAX_DEV] = { [ 0 ... MAX_DEV - 1 ] = DEFAULT_UBD };
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static int ubd0_init(void)
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{
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struct ubd *dev = &ubd_dev[0];
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struct ubd *ubd_dev = &ubd_devs[0];
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if(dev->file == NULL)
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dev->file = "root_fs";
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if(ubd_dev->file == NULL)
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ubd_dev->file = "root_fs";
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return(0);
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}
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@ -290,7 +290,7 @@ static int parse_unit(char **ptr)
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static int ubd_setup_common(char *str, int *index_out)
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{
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struct ubd *dev;
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struct ubd *ubd_dev;
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struct openflags flags = global_openflags;
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char *backing_file;
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int n, err, i;
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@ -345,8 +345,8 @@ static int ubd_setup_common(char *str, int *index_out)
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err = 1;
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spin_lock(&ubd_lock);
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dev = &ubd_dev[n];
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if(dev->file != NULL){
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ubd_dev = &ubd_devs[n];
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if(ubd_dev->file != NULL){
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printk(KERN_ERR "ubd_setup : device already configured\n");
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goto out;
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}
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@ -363,10 +363,10 @@ static int ubd_setup_common(char *str, int *index_out)
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flags.s = 1;
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break;
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case 'd':
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dev->no_cow = 1;
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ubd_dev->no_cow = 1;
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break;
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case 'c':
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dev->shared = 1;
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ubd_dev->shared = 1;
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break;
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case '=':
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str++;
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@ -393,7 +393,7 @@ break_loop:
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}
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if(backing_file){
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if(dev->no_cow)
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if(ubd_dev->no_cow)
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printk(KERN_ERR "Can't specify both 'd' and a "
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"cow file\n");
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else {
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@ -401,9 +401,9 @@ break_loop:
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backing_file++;
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}
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}
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dev->file = str;
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dev->cow.file = backing_file;
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dev->boot_openflags = flags;
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ubd_dev->file = str;
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ubd_dev->cow.file = backing_file;
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ubd_dev->boot_openflags = flags;
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out:
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spin_unlock(&ubd_lock);
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return(err);
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@ -544,83 +544,83 @@ void kill_io_thread(void)
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__uml_exitcall(kill_io_thread);
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static int ubd_file_size(struct ubd *dev, __u64 *size_out)
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static int ubd_file_size(struct ubd *ubd_dev, __u64 *size_out)
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{
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char *file;
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file = dev->cow.file ? dev->cow.file : dev->file;
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file = ubd_dev->cow.file ? ubd_dev->cow.file : ubd_dev->file;
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return(os_file_size(file, size_out));
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}
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static void ubd_close(struct ubd *dev)
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static void ubd_close(struct ubd *ubd_dev)
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{
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os_close_file(dev->fd);
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if(dev->cow.file == NULL)
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os_close_file(ubd_dev->fd);
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if(ubd_dev->cow.file == NULL)
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return;
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os_close_file(dev->cow.fd);
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vfree(dev->cow.bitmap);
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dev->cow.bitmap = NULL;
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os_close_file(ubd_dev->cow.fd);
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vfree(ubd_dev->cow.bitmap);
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ubd_dev->cow.bitmap = NULL;
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}
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static int ubd_open_dev(struct ubd *dev)
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static int ubd_open_dev(struct ubd *ubd_dev)
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{
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struct openflags flags;
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char **back_ptr;
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int err, create_cow, *create_ptr;
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dev->openflags = dev->boot_openflags;
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ubd_dev->openflags = ubd_dev->boot_openflags;
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create_cow = 0;
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create_ptr = (dev->cow.file != NULL) ? &create_cow : NULL;
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back_ptr = dev->no_cow ? NULL : &dev->cow.file;
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dev->fd = open_ubd_file(dev->file, &dev->openflags, dev->shared,
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back_ptr, &dev->cow.bitmap_offset,
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&dev->cow.bitmap_len, &dev->cow.data_offset,
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create_ptr = (ubd_dev->cow.file != NULL) ? &create_cow : NULL;
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back_ptr = ubd_dev->no_cow ? NULL : &ubd_dev->cow.file;
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ubd_dev->fd = open_ubd_file(ubd_dev->file, &ubd_dev->openflags, ubd_dev->shared,
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back_ptr, &ubd_dev->cow.bitmap_offset,
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&ubd_dev->cow.bitmap_len, &ubd_dev->cow.data_offset,
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create_ptr);
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if((dev->fd == -ENOENT) && create_cow){
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dev->fd = create_cow_file(dev->file, dev->cow.file,
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dev->openflags, 1 << 9, PAGE_SIZE,
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&dev->cow.bitmap_offset,
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&dev->cow.bitmap_len,
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&dev->cow.data_offset);
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if(dev->fd >= 0){
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if((ubd_dev->fd == -ENOENT) && create_cow){
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ubd_dev->fd = create_cow_file(ubd_dev->file, ubd_dev->cow.file,
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ubd_dev->openflags, 1 << 9, PAGE_SIZE,
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&ubd_dev->cow.bitmap_offset,
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&ubd_dev->cow.bitmap_len,
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&ubd_dev->cow.data_offset);
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if(ubd_dev->fd >= 0){
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printk(KERN_INFO "Creating \"%s\" as COW file for "
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"\"%s\"\n", dev->file, dev->cow.file);
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"\"%s\"\n", ubd_dev->file, ubd_dev->cow.file);
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}
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}
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if(dev->fd < 0){
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printk("Failed to open '%s', errno = %d\n", dev->file,
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-dev->fd);
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return(dev->fd);
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if(ubd_dev->fd < 0){
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printk("Failed to open '%s', errno = %d\n", ubd_dev->file,
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-ubd_dev->fd);
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return(ubd_dev->fd);
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}
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if(dev->cow.file != NULL){
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if(ubd_dev->cow.file != NULL){
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err = -ENOMEM;
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dev->cow.bitmap = (void *) vmalloc(dev->cow.bitmap_len);
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if(dev->cow.bitmap == NULL){
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ubd_dev->cow.bitmap = (void *) vmalloc(ubd_dev->cow.bitmap_len);
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if(ubd_dev->cow.bitmap == NULL){
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printk(KERN_ERR "Failed to vmalloc COW bitmap\n");
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goto error;
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}
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flush_tlb_kernel_vm();
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err = read_cow_bitmap(dev->fd, dev->cow.bitmap,
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dev->cow.bitmap_offset,
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dev->cow.bitmap_len);
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err = read_cow_bitmap(ubd_dev->fd, ubd_dev->cow.bitmap,
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ubd_dev->cow.bitmap_offset,
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ubd_dev->cow.bitmap_len);
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if(err < 0)
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goto error;
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flags = dev->openflags;
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flags = ubd_dev->openflags;
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flags.w = 0;
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err = open_ubd_file(dev->cow.file, &flags, dev->shared, NULL,
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err = open_ubd_file(ubd_dev->cow.file, &flags, ubd_dev->shared, NULL,
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NULL, NULL, NULL, NULL);
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if(err < 0) goto error;
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dev->cow.fd = err;
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ubd_dev->cow.fd = err;
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}
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return(0);
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error:
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os_close_file(dev->fd);
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os_close_file(ubd_dev->fd);
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return(err);
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}
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@ -645,13 +645,13 @@ static int ubd_new_disk(int major, u64 size, int unit,
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/* sysfs register (not for ide fake devices) */
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if (major == MAJOR_NR) {
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ubd_dev[unit].pdev.id = unit;
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ubd_dev[unit].pdev.name = DRIVER_NAME;
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platform_device_register(&ubd_dev[unit].pdev);
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disk->driverfs_dev = &ubd_dev[unit].pdev.dev;
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ubd_devs[unit].pdev.id = unit;
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ubd_devs[unit].pdev.name = DRIVER_NAME;
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platform_device_register(&ubd_devs[unit].pdev);
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disk->driverfs_dev = &ubd_devs[unit].pdev.dev;
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}
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disk->private_data = &ubd_dev[unit];
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disk->private_data = &ubd_devs[unit];
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disk->queue = ubd_queue;
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add_disk(disk);
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@ -663,25 +663,25 @@ static int ubd_new_disk(int major, u64 size, int unit,
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static int ubd_add(int n)
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{
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struct ubd *dev = &ubd_dev[n];
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struct ubd *ubd_dev = &ubd_devs[n];
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int err;
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err = -ENODEV;
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if(dev->file == NULL)
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if(ubd_dev->file == NULL)
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goto out;
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err = ubd_file_size(dev, &dev->size);
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err = ubd_file_size(ubd_dev, &ubd_dev->size);
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if(err < 0)
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goto out;
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dev->size = ROUND_BLOCK(dev->size);
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ubd_dev->size = ROUND_BLOCK(ubd_dev->size);
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err = ubd_new_disk(MAJOR_NR, dev->size, n, &ubd_gendisk[n]);
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err = ubd_new_disk(MAJOR_NR, ubd_dev->size, n, &ubd_gendisk[n]);
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if(err)
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goto out;
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if(fake_major != MAJOR_NR)
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ubd_new_disk(fake_major, dev->size, n,
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ubd_new_disk(fake_major, ubd_dev->size, n,
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&fake_gendisk[n]);
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/* perhaps this should also be under the "if (fake_major)" above */
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@ -713,7 +713,7 @@ static int ubd_config(char *str)
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spin_lock(&ubd_lock);
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err = ubd_add(n);
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if(err)
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ubd_dev[n].file = NULL;
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ubd_devs[n].file = NULL;
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spin_unlock(&ubd_lock);
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return(err);
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@ -721,7 +721,7 @@ static int ubd_config(char *str)
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static int ubd_get_config(char *name, char *str, int size, char **error_out)
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{
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struct ubd *dev;
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struct ubd *ubd_dev;
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int n, len = 0;
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n = parse_unit(&name);
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@ -730,19 +730,19 @@ static int ubd_get_config(char *name, char *str, int size, char **error_out)
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return(-1);
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}
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dev = &ubd_dev[n];
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ubd_dev = &ubd_devs[n];
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spin_lock(&ubd_lock);
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if(dev->file == NULL){
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if(ubd_dev->file == NULL){
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CONFIG_CHUNK(str, size, len, "", 1);
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goto out;
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}
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CONFIG_CHUNK(str, size, len, dev->file, 0);
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CONFIG_CHUNK(str, size, len, ubd_dev->file, 0);
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if(dev->cow.file != NULL){
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if(ubd_dev->cow.file != NULL){
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CONFIG_CHUNK(str, size, len, ",", 0);
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CONFIG_CHUNK(str, size, len, dev->cow.file, 1);
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CONFIG_CHUNK(str, size, len, ubd_dev->cow.file, 1);
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}
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else CONFIG_CHUNK(str, size, len, "", 1);
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@ -763,7 +763,7 @@ static int ubd_id(char **str, int *start_out, int *end_out)
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static int ubd_remove(int n)
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{
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struct ubd *dev;
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struct ubd *ubd_dev;
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int err = -ENODEV;
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spin_lock(&ubd_lock);
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@ -771,14 +771,14 @@ static int ubd_remove(int n)
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if(ubd_gendisk[n] == NULL)
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goto out;
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dev = &ubd_dev[n];
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ubd_dev = &ubd_devs[n];
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if(dev->file == NULL)
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if(ubd_dev->file == NULL)
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goto out;
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/* you cannot remove a open disk */
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err = -EBUSY;
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if(dev->count > 0)
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if(ubd_dev->count > 0)
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goto out;
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del_gendisk(ubd_gendisk[n]);
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@ -791,8 +791,8 @@ static int ubd_remove(int n)
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fake_gendisk[n] = NULL;
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}
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platform_device_unregister(&dev->pdev);
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*dev = ((struct ubd) DEFAULT_UBD);
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platform_device_unregister(&ubd_dev->pdev);
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*ubd_dev = ((struct ubd) DEFAULT_UBD);
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err = 0;
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out:
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spin_unlock(&ubd_lock);
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@ -870,7 +870,7 @@ int ubd_driver_init(void){
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return(0);
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}
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err = um_request_irq(UBD_IRQ, thread_fd, IRQ_READ, ubd_intr,
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IRQF_DISABLED, "ubd", ubd_dev);
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IRQF_DISABLED, "ubd", ubd_devs);
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if(err != 0)
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printk(KERN_ERR "um_request_irq failed - errno = %d\n", -err);
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return 0;
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@ -881,24 +881,24 @@ device_initcall(ubd_driver_init);
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static int ubd_open(struct inode *inode, struct file *filp)
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{
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struct gendisk *disk = inode->i_bdev->bd_disk;
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struct ubd *dev = disk->private_data;
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struct ubd *ubd_dev = disk->private_data;
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int err = 0;
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if(dev->count == 0){
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err = ubd_open_dev(dev);
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if(ubd_dev->count == 0){
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err = ubd_open_dev(ubd_dev);
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if(err){
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printk(KERN_ERR "%s: Can't open \"%s\": errno = %d\n",
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disk->disk_name, dev->file, -err);
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disk->disk_name, ubd_dev->file, -err);
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goto out;
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}
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}
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dev->count++;
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set_disk_ro(disk, !dev->openflags.w);
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ubd_dev->count++;
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set_disk_ro(disk, !ubd_dev->openflags.w);
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/* This should no more be needed. And it didn't work anyway to exclude
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* read-write remounting of filesystems.*/
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/*if((filp->f_mode & FMODE_WRITE) && !dev->openflags.w){
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if(--dev->count == 0) ubd_close(dev);
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/*if((filp->f_mode & FMODE_WRITE) && !ubd_dev->openflags.w){
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if(--ubd_dev->count == 0) ubd_close(ubd_dev);
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err = -EROFS;
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}*/
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out:
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@ -908,10 +908,10 @@ static int ubd_open(struct inode *inode, struct file *filp)
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static int ubd_release(struct inode * inode, struct file * file)
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{
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struct gendisk *disk = inode->i_bdev->bd_disk;
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struct ubd *dev = disk->private_data;
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struct ubd *ubd_dev = disk->private_data;
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if(--dev->count == 0)
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ubd_close(dev);
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if(--ubd_dev->count == 0)
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ubd_close(ubd_dev);
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return(0);
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}
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@ -979,12 +979,12 @@ static void cowify_req(struct io_thread_req *req, unsigned long *bitmap,
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static int prepare_request(struct request *req, struct io_thread_req *io_req)
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{
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struct gendisk *disk = req->rq_disk;
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struct ubd *dev = disk->private_data;
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struct ubd *ubd_dev = disk->private_data;
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__u64 offset;
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int len;
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/* This should be impossible now */
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if((rq_data_dir(req) == WRITE) && !dev->openflags.w){
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if((rq_data_dir(req) == WRITE) && !ubd_dev->openflags.w){
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printk("Write attempted on readonly ubd device %s\n",
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disk->disk_name);
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end_request(req, 0);
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@ -994,8 +994,8 @@ static int prepare_request(struct request *req, struct io_thread_req *io_req)
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offset = ((__u64) req->sector) << 9;
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len = req->current_nr_sectors << 9;
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io_req->fds[0] = (dev->cow.file != NULL) ? dev->cow.fd : dev->fd;
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io_req->fds[1] = dev->fd;
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io_req->fds[0] = (ubd_dev->cow.file != NULL) ? ubd_dev->cow.fd : ubd_dev->fd;
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io_req->fds[1] = ubd_dev->fd;
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io_req->cow_offset = -1;
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io_req->offset = offset;
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io_req->length = len;
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@ -1004,13 +1004,13 @@ static int prepare_request(struct request *req, struct io_thread_req *io_req)
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|
||||
io_req->op = (rq_data_dir(req) == READ) ? UBD_READ : UBD_WRITE;
|
||||
io_req->offsets[0] = 0;
|
||||
io_req->offsets[1] = dev->cow.data_offset;
|
||||
io_req->offsets[1] = ubd_dev->cow.data_offset;
|
||||
io_req->buffer = req->buffer;
|
||||
io_req->sectorsize = 1 << 9;
|
||||
|
||||
if(dev->cow.file != NULL)
|
||||
cowify_req(io_req, dev->cow.bitmap, dev->cow.bitmap_offset,
|
||||
dev->cow.bitmap_len);
|
||||
if(ubd_dev->cow.file != NULL)
|
||||
cowify_req(io_req, ubd_dev->cow.bitmap, ubd_dev->cow.bitmap_offset,
|
||||
ubd_dev->cow.bitmap_len);
|
||||
|
||||
return(0);
|
||||
}
|
||||
@ -1048,18 +1048,18 @@ static void do_ubd_request(request_queue_t *q)
|
||||
|
||||
static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
|
||||
{
|
||||
struct ubd *dev = bdev->bd_disk->private_data;
|
||||
struct ubd *ubd_dev = bdev->bd_disk->private_data;
|
||||
|
||||
geo->heads = 128;
|
||||
geo->sectors = 32;
|
||||
geo->cylinders = dev->size / (128 * 32 * 512);
|
||||
geo->cylinders = ubd_dev->size / (128 * 32 * 512);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ubd_ioctl(struct inode * inode, struct file * file,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct ubd *dev = inode->i_bdev->bd_disk->private_data;
|
||||
struct ubd *ubd_dev = inode->i_bdev->bd_disk->private_data;
|
||||
struct hd_driveid ubd_id = {
|
||||
.cyls = 0,
|
||||
.heads = 128,
|
||||
@ -1069,7 +1069,7 @@ static int ubd_ioctl(struct inode * inode, struct file * file,
|
||||
switch (cmd) {
|
||||
struct cdrom_volctrl volume;
|
||||
case HDIO_GET_IDENTITY:
|
||||
ubd_id.cyls = dev->size / (128 * 32 * 512);
|
||||
ubd_id.cyls = ubd_dev->size / (128 * 32 * 512);
|
||||
if(copy_to_user((char __user *) arg, (char *) &ubd_id,
|
||||
sizeof(ubd_id)))
|
||||
return(-EFAULT);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user