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Merge tag 'upstream-4.2-rc1' of git://git.infradead.org/linux-ubifs
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Pull UBI/UBIFS updates from Richard Weinberger:
 "Minor fixes for UBI and UBIFS"

* tag 'upstream-4.2-rc1' of git://git.infradead.org/linux-ubifs:
  UBI: Remove unnecessary `\'
  UBI: Use static class and attribute groups
  UBI: add a helper function for updatting on-flash layout volumes
  UBI: Fastmap: Do not add vol if it already exists
  UBI: Init vol->reserved_pebs by assignment
  UBI: Fastmap: Rename variables to make them meaningful
  UBI: Fastmap: Remove unnecessary `\'
  UBI: Fastmap: Use max() to get the larger value
  ubifs: fix to check error code of register_shrinker
  UBI: block: Dynamically allocate minor numbers
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@torvalds
torvalds committed Jun 25, 2015
2 parents d857da7 + 669d3d1 commit cc8a0a9
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Showing 8 changed files with 149 additions and 209 deletions.
16 changes: 14 additions & 2 deletions drivers/mtd/ubi/block.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,7 @@
#include <linux/blk-mq.h>
#include <linux/hdreg.h>
#include <linux/scatterlist.h>
#include <linux/idr.h>
#include <asm/div64.h>

#include "ubi-media.h"
Expand Down Expand Up @@ -353,6 +354,8 @@ static struct blk_mq_ops ubiblock_mq_ops = {
.map_queue = blk_mq_map_queue,
};

static DEFINE_IDR(ubiblock_minor_idr);

int ubiblock_create(struct ubi_volume_info *vi)
{
struct ubiblock *dev;
Expand Down Expand Up @@ -390,7 +393,13 @@ int ubiblock_create(struct ubi_volume_info *vi)

gd->fops = &ubiblock_ops;
gd->major = ubiblock_major;
gd->first_minor = dev->ubi_num * UBI_MAX_VOLUMES + dev->vol_id;
gd->first_minor = idr_alloc(&ubiblock_minor_idr, dev, 0, 0, GFP_KERNEL);
if (gd->first_minor < 0) {
dev_err(disk_to_dev(gd),
"block: dynamic minor allocation failed");
ret = -ENODEV;
goto out_put_disk;
}
gd->private_data = dev;
sprintf(gd->disk_name, "ubiblock%d_%d", dev->ubi_num, dev->vol_id);
set_capacity(gd, disk_capacity);
Expand All @@ -407,7 +416,7 @@ int ubiblock_create(struct ubi_volume_info *vi)
ret = blk_mq_alloc_tag_set(&dev->tag_set);
if (ret) {
dev_err(disk_to_dev(dev->gd), "blk_mq_alloc_tag_set failed");
goto out_put_disk;
goto out_remove_minor;
}

dev->rq = blk_mq_init_queue(&dev->tag_set);
Expand Down Expand Up @@ -445,6 +454,8 @@ int ubiblock_create(struct ubi_volume_info *vi)
blk_cleanup_queue(dev->rq);
out_free_tags:
blk_mq_free_tag_set(&dev->tag_set);
out_remove_minor:
idr_remove(&ubiblock_minor_idr, gd->first_minor);
out_put_disk:
put_disk(dev->gd);
out_free_dev:
Expand All @@ -463,6 +474,7 @@ static void ubiblock_cleanup(struct ubiblock *dev)
blk_cleanup_queue(dev->rq);
blk_mq_free_tag_set(&dev->tag_set);
dev_info(disk_to_dev(dev->gd), "released");
idr_remove(&ubiblock_minor_idr, dev->gd->first_minor);
put_disk(dev->gd);
}

Expand Down
107 changes: 38 additions & 69 deletions drivers/mtd/ubi/build.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -83,8 +83,6 @@ static struct mtd_dev_param __initdata mtd_dev_param[UBI_MAX_DEVICES];
static bool fm_autoconvert;
static bool fm_debug;
#endif
/* Root UBI "class" object (corresponds to '/<sysfs>/class/ubi/') */
struct class *ubi_class;

/* Slab cache for wear-leveling entries */
struct kmem_cache *ubi_wl_entry_slab;
Expand Down Expand Up @@ -113,8 +111,17 @@ static ssize_t ubi_version_show(struct class *class,
}

/* UBI version attribute ('/<sysfs>/class/ubi/version') */
static struct class_attribute ubi_version =
__ATTR(version, S_IRUGO, ubi_version_show, NULL);
static struct class_attribute ubi_class_attrs[] = {
__ATTR(version, S_IRUGO, ubi_version_show, NULL),
__ATTR_NULL
};

/* Root UBI "class" object (corresponds to '/<sysfs>/class/ubi/') */
struct class ubi_class = {
.name = UBI_NAME_STR,
.owner = THIS_MODULE,
.class_attrs = ubi_class_attrs,
};

static ssize_t dev_attribute_show(struct device *dev,
struct device_attribute *attr, char *buf);
Expand Down Expand Up @@ -385,6 +392,22 @@ static ssize_t dev_attribute_show(struct device *dev,
return ret;
}

static struct attribute *ubi_dev_attrs[] = {
&dev_eraseblock_size.attr,
&dev_avail_eraseblocks.attr,
&dev_total_eraseblocks.attr,
&dev_volumes_count.attr,
&dev_max_ec.attr,
&dev_reserved_for_bad.attr,
&dev_bad_peb_count.attr,
&dev_max_vol_count.attr,
&dev_min_io_size.attr,
&dev_bgt_enabled.attr,
&dev_mtd_num.attr,
NULL
};
ATTRIBUTE_GROUPS(ubi_dev);

static void dev_release(struct device *dev)
{
struct ubi_device *ubi = container_of(dev, struct ubi_device, dev);
Expand All @@ -407,45 +430,15 @@ static int ubi_sysfs_init(struct ubi_device *ubi, int *ref)

ubi->dev.release = dev_release;
ubi->dev.devt = ubi->cdev.dev;
ubi->dev.class = ubi_class;
ubi->dev.class = &ubi_class;
ubi->dev.groups = ubi_dev_groups;
dev_set_name(&ubi->dev, UBI_NAME_STR"%d", ubi->ubi_num);
err = device_register(&ubi->dev);
if (err)
return err;

*ref = 1;
err = device_create_file(&ubi->dev, &dev_eraseblock_size);
if (err)
return err;
err = device_create_file(&ubi->dev, &dev_avail_eraseblocks);
if (err)
return err;
err = device_create_file(&ubi->dev, &dev_total_eraseblocks);
if (err)
return err;
err = device_create_file(&ubi->dev, &dev_volumes_count);
if (err)
return err;
err = device_create_file(&ubi->dev, &dev_max_ec);
if (err)
return err;
err = device_create_file(&ubi->dev, &dev_reserved_for_bad);
if (err)
return err;
err = device_create_file(&ubi->dev, &dev_bad_peb_count);
if (err)
return err;
err = device_create_file(&ubi->dev, &dev_max_vol_count);
if (err)
return err;
err = device_create_file(&ubi->dev, &dev_min_io_size);
if (err)
return err;
err = device_create_file(&ubi->dev, &dev_bgt_enabled);
if (err)
return err;
err = device_create_file(&ubi->dev, &dev_mtd_num);
return err;
return 0;
}

/**
Expand All @@ -454,17 +447,6 @@ static int ubi_sysfs_init(struct ubi_device *ubi, int *ref)
*/
static void ubi_sysfs_close(struct ubi_device *ubi)
{
device_remove_file(&ubi->dev, &dev_mtd_num);
device_remove_file(&ubi->dev, &dev_bgt_enabled);
device_remove_file(&ubi->dev, &dev_min_io_size);
device_remove_file(&ubi->dev, &dev_max_vol_count);
device_remove_file(&ubi->dev, &dev_bad_peb_count);
device_remove_file(&ubi->dev, &dev_reserved_for_bad);
device_remove_file(&ubi->dev, &dev_max_ec);
device_remove_file(&ubi->dev, &dev_volumes_count);
device_remove_file(&ubi->dev, &dev_total_eraseblocks);
device_remove_file(&ubi->dev, &dev_avail_eraseblocks);
device_remove_file(&ubi->dev, &dev_eraseblock_size);
device_unregister(&ubi->dev);
}

Expand Down Expand Up @@ -947,8 +929,8 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
*/
ubi->fm_pool.max_size = min(((int)mtd_div_by_eb(ubi->mtd->size,
ubi->mtd) / 100) * 5, UBI_FM_MAX_POOL_SIZE);
if (ubi->fm_pool.max_size < UBI_FM_MIN_POOL_SIZE)
ubi->fm_pool.max_size = UBI_FM_MIN_POOL_SIZE;
ubi->fm_pool.max_size = max(ubi->fm_pool.max_size,
UBI_FM_MIN_POOL_SIZE);

ubi->fm_wl_pool.max_size = ubi->fm_pool.max_size / 2;
ubi->fm_disabled = !fm_autoconvert;
Expand Down Expand Up @@ -1233,23 +1215,14 @@ static int __init ubi_init(void)
}

/* Create base sysfs directory and sysfs files */
ubi_class = class_create(THIS_MODULE, UBI_NAME_STR);
if (IS_ERR(ubi_class)) {
err = PTR_ERR(ubi_class);
pr_err("UBI error: cannot create UBI class");
goto out;
}

err = class_create_file(ubi_class, &ubi_version);
if (err) {
pr_err("UBI error: cannot create sysfs file");
goto out_class;
}
err = class_register(&ubi_class);
if (err < 0)
return err;

err = misc_register(&ubi_ctrl_cdev);
if (err) {
pr_err("UBI error: cannot register device");
goto out_version;
goto out;
}

ubi_wl_entry_slab = kmem_cache_create("ubi_wl_entry_slab",
Expand Down Expand Up @@ -1333,11 +1306,8 @@ static int __init ubi_init(void)
kmem_cache_destroy(ubi_wl_entry_slab);
out_dev_unreg:
misc_deregister(&ubi_ctrl_cdev);
out_version:
class_remove_file(ubi_class, &ubi_version);
out_class:
class_destroy(ubi_class);
out:
class_unregister(&ubi_class);
pr_err("UBI error: cannot initialize UBI, error %d", err);
return err;
}
Expand All @@ -1358,8 +1328,7 @@ static void __exit ubi_exit(void)
ubi_debugfs_exit();
kmem_cache_destroy(ubi_wl_entry_slab);
misc_deregister(&ubi_ctrl_cdev);
class_remove_file(ubi_class, &ubi_version);
class_destroy(ubi_class);
class_unregister(&ubi_class);
}
module_exit(ubi_exit);

Expand Down
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