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UBI: add ioctl for is_mapped operation
This patch adds ioctl to check if an LEB is mapped or not (as a debugging option so far). [Re-named ioctl to make it look the same as the other one and made some minor stylistic changes. Artem Bityutskiy.] Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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@ -546,6 +546,20 @@ static int vol_cdev_ioctl(struct inode *inode, struct file *file,
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err = ubi_leb_unmap(desc, lnum);
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break;
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}
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/* Check if logical eraseblock is mapped command */
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case UBI_IOCEBISMAP:
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{
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int32_t lnum;
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err = get_user(lnum, (__user int32_t *)argp);
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if (err) {
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err = -EFAULT;
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break;
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}
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err = ubi_is_mapped(desc, lnum);
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break;
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}
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#endif
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default:
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@ -137,6 +137,8 @@
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#define UBI_IOCEBMAP _IOW(UBI_VOL_IOC_MAGIC, 3, struct ubi_map_req)
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/* Unmap an eraseblock, used for debugging, disabled by default */
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#define UBI_IOCEBUNMAP _IOW(UBI_VOL_IOC_MAGIC, 4, int32_t)
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/* Check if an eraseblock is mapped, used for debugging, disabled by default */
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#define UBI_IOCEBISMAP _IOR(UBI_VOL_IOC_MAGIC, 5, int32_t)
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/* Maximum MTD device name length supported by UBI */
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#define MAX_UBI_MTD_NAME_LEN 127
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