diff options
| -rw-r--r-- | drivers/block/virtio_blk.c | 9 | ||||
| -rw-r--r-- | drivers/mmc/card/block.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/sd.c | 8 | ||||
| -rw-r--r-- | include/linux/string_helpers.h | 2 | ||||
| -rw-r--r-- | lib/string_helpers.c | 68 |
5 files changed, 60 insertions, 31 deletions
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index 655e570b9b31..5ea2f0bbbc7c 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c @@ -342,7 +342,7 @@ static void virtblk_config_changed_work(struct work_struct *work) struct request_queue *q = vblk->disk->queue; char cap_str_2[10], cap_str_10[10]; char *envp[] = { "RESIZE=1", NULL }; - u64 capacity, size; + u64 capacity; /* Host must always specify the capacity. */ virtio_cread(vdev, struct virtio_blk_config, capacity, &capacity); @@ -354,9 +354,10 @@ static void virtblk_config_changed_work(struct work_struct *work) capacity = (sector_t)-1; } - size = capacity * queue_logical_block_size(q); - string_get_size(size, STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); - string_get_size(size, STRING_UNITS_10, cap_str_10, sizeof(cap_str_10)); + string_get_size(capacity, queue_logical_block_size(q), + STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); + string_get_size(capacity, queue_logical_block_size(q), + STRING_UNITS_10, cap_str_10, sizeof(cap_str_10)); dev_notice(&vdev->dev, "new size: %llu %d-byte logical blocks (%s/%s)\n", diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index c69afb5e264e..2fc426926574 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -2230,7 +2230,7 @@ static int mmc_blk_alloc_part(struct mmc_card *card, part_md->part_type = part_type; list_add(&part_md->part, &md->part); - string_get_size((u64)get_capacity(part_md->disk) << 9, STRING_UNITS_2, + string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2, cap_str, sizeof(cap_str)); pr_info("%s: %s %s partition %u %s\n", part_md->disk->disk_name, mmc_card_id(card), @@ -2436,7 +2436,7 @@ static int mmc_blk_probe(struct device *dev) if (IS_ERR(md)) return PTR_ERR(md); - string_get_size((u64)get_capacity(md->disk) << 9, STRING_UNITS_2, + string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2, cap_str, sizeof(cap_str)); pr_info("%s: %s %s %s %s\n", md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 9e0c63e57aff..dcc42446f58a 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -2211,11 +2211,11 @@ got_data: { char cap_str_2[10], cap_str_10[10]; - u64 sz = (u64)sdkp->capacity << ilog2(sector_size); - string_get_size(sz, STRING_UNITS_2, cap_str_2, - sizeof(cap_str_2)); - string_get_size(sz, STRING_UNITS_10, cap_str_10, + string_get_size(sdkp->capacity, sector_size, + STRING_UNITS_2, cap_str_2, sizeof(cap_str_2)); + string_get_size(sdkp->capacity, sector_size, + STRING_UNITS_10, cap_str_10, sizeof(cap_str_10)); if (sdkp->first_scan || old_capacity != sdkp->capacity) { diff --git a/include/linux/string_helpers.h b/include/linux/string_helpers.h index 657571817260..263328063730 100644 --- a/include/linux/string_helpers.h +++ b/include/linux/string_helpers.h @@ -10,7 +10,7 @@ enum string_size_units { STRING_UNITS_2, /* use binary powers of 2^10 */ }; -void string_get_size(u64 size, enum string_size_units units, +void string_get_size(u64 size, u64 blk_size, enum string_size_units units, char *buf, int len); #define UNESCAPE_SPACE 0x01 diff --git a/lib/string_helpers.c b/lib/string_helpers.c index 8f8c4417f228..4a913ec3acf9 100644 --- a/lib/string_helpers.c +++ b/lib/string_helpers.c @@ -4,6 +4,7 @@ * Copyright 31 August 2008 James Bottomley * Copyright (C) 2013, Intel Corporation */ +#include <linux/bug.h> #include <linux/kernel.h> #include <linux/math64.h> #include <linux/export.h> @@ -14,7 +15,8 @@ /** * string_get_size - get the size in the specified units - * @size: The size to be converted + * @size: The size to be converted in blocks + * @blk_size: Size of the block (use 1 for size in bytes) * @units: units to use (powers of 1000 or 1024) * @buf: buffer to format to * @len: length of buffer @@ -24,14 +26,14 @@ * at least 9 bytes and will always be zero terminated. * */ -void string_get_size(u64 size, const enum string_size_units units, +void string_get_size(u64 size, u64 blk_size, const enum string_size_units units, char *buf, int len) { static const char *const units_10[] = { - "B", "kB", "MB", "GB", "TB", "PB", "EB" + "B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB" }; static const char *const units_2[] = { - "B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB" + "B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB" }; static const char *const *const units_str[] = { [STRING_UNITS_10] = units_10, @@ -42,31 +44,57 @@ void string_get_size(u64 size, const enum string_size_units units, [STRING_UNITS_2] = 1024, }; int i, j; - u32 remainder = 0, sf_cap; + u32 remainder = 0, sf_cap, exp; char tmp[8]; + const char *unit; tmp[0] = '\0'; i = 0; - if (size >= divisor[units]) { - while (size >= divisor[units]) { - remainder = do_div(size, divisor[units]); - i++; - } + if (!size) + goto out; - sf_cap = size; - for (j = 0; sf_cap*10 < 1000; j++) - sf_cap *= 10; + while (blk_size >= divisor[units]) { + remainder = do_div(blk_size, divisor[units]); + i++; + } - if (j) { - remainder *= 1000; - remainder /= divisor[units]; - snprintf(tmp, sizeof(tmp), ".%03u", remainder); - tmp[j+1] = '\0'; - } + exp = divisor[units] / (u32)blk_size; + if (size >= exp) { + remainder = do_div(size, divisor[units]); + remainder *= blk_size; + i++; + } else { + remainder *= size; + } + + size *= blk_size; + size += remainder / divisor[units]; + remainder %= divisor[units]; + + while (size >= divisor[units]) { + remainder = do_div(size, divisor[units]); + i++; } + sf_cap = size; + for (j = 0; sf_cap*10 < 1000; j++) + sf_cap *= 10; + + if (j) { + remainder *= 1000; + remainder /= divisor[units]; + snprintf(tmp, sizeof(tmp), ".%03u", remainder); + tmp[j+1] = '\0'; + } + + out: + if (i >= ARRAY_SIZE(units_2)) + unit = "UNK"; + else + unit = units_str[units][i]; + snprintf(buf, len, "%u%s %s", (u32)size, - tmp, units_str[units][i]); + tmp, unit); } EXPORT_SYMBOL(string_get_size); |