From: Yu Kuai <yukuai3@xxxxxxxxxx> There are no functional changes, and the new helper will be used in multiple places in following patches to avoid dereferencing bitmap directly. Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx> --- drivers/md/md-bitmap.c | 25 ++++++------------------- drivers/md/md-bitmap.h | 8 +++++++- drivers/md/md.c | 29 ++++++++++++++++++++++++++++- 3 files changed, 41 insertions(+), 21 deletions(-) diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c index 08743dcc70f1..66ebe12d80ae 100644 --- a/drivers/md/md-bitmap.c +++ b/drivers/md/md-bitmap.c @@ -2094,32 +2094,19 @@ int md_bitmap_copy_from_slot(struct mddev *mddev, int slot, } EXPORT_SYMBOL_GPL(md_bitmap_copy_from_slot); - -void md_bitmap_status(struct seq_file *seq, struct bitmap *bitmap) +int md_bitmap_get_stats(struct bitmap *bitmap, struct md_bitmap_stats *stats) { - unsigned long chunk_kb; struct bitmap_counts *counts; if (!bitmap) - return; + return -ENOENT; counts = &bitmap->counts; + stats->missing_pages = counts->missing_pages; + stats->pages = counts->pages; + stats->file = bitmap->storage.file; - chunk_kb = bitmap->mddev->bitmap_info.chunksize >> 10; - seq_printf(seq, "bitmap: %lu/%lu pages [%luKB], " - "%lu%s chunk", - counts->pages - counts->missing_pages, - counts->pages, - (counts->pages - counts->missing_pages) - << (PAGE_SHIFT - 10), - chunk_kb ? chunk_kb : bitmap->mddev->bitmap_info.chunksize, - chunk_kb ? "KB" : "B"); - if (bitmap->storage.file) { - seq_printf(seq, ", file: "); - seq_file_path(seq, bitmap->storage.file, " \t\n"); - } - - seq_printf(seq, "\n"); + return 0; } int md_bitmap_resize(struct bitmap *bitmap, sector_t blocks, diff --git a/drivers/md/md-bitmap.h b/drivers/md/md-bitmap.h index bb9eb418780a..b60418e3f573 100644 --- a/drivers/md/md-bitmap.h +++ b/drivers/md/md-bitmap.h @@ -234,6 +234,12 @@ struct bitmap { int cluster_slot; /* Slot offset for clustered env */ }; +struct md_bitmap_stats { + unsigned long missing_pages; + unsigned long pages; + struct file *file; +}; + /* the bitmap API */ /* these are used only by md/bitmap */ @@ -244,7 +250,7 @@ void md_bitmap_destroy(struct mddev *mddev); void md_bitmap_print_sb(struct bitmap *bitmap); void md_bitmap_update_sb(struct bitmap *bitmap); -void md_bitmap_status(struct seq_file *seq, struct bitmap *bitmap); +int md_bitmap_get_stats(struct bitmap *bitmap, struct md_bitmap_stats *stats); int md_bitmap_setallbits(struct bitmap *bitmap); void md_bitmap_write_all(struct bitmap *bitmap); diff --git a/drivers/md/md.c b/drivers/md/md.c index d3a837506a36..b52d0cc773ae 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -8370,6 +8370,33 @@ static void md_seq_stop(struct seq_file *seq, void *v) spin_unlock(&all_mddevs_lock); } +static void md_bitmap_status(struct seq_file *seq, struct mddev *mddev) +{ + struct md_bitmap_stats stats; + unsigned long used_pages; + unsigned long chunk_kb; + int err; + + err = md_bitmap_get_stats(mddev->bitmap, &stats); + if (err) + return; + + chunk_kb = mddev->bitmap_info.chunksize >> 10; + used_pages = stats.pages - stats.missing_pages; + + seq_printf(seq, "bitmap: %lu/%lu pages [%luKB], %lu%s chunk", + used_pages, stats.pages, used_pages << (PAGE_SHIFT - 10), + chunk_kb ? chunk_kb : mddev->bitmap_info.chunksize, + chunk_kb ? "KB" : "B"); + + if (stats.file) { + seq_puts(seq, ", file: "); + seq_file_path(seq, stats.file, " \t\n"); + } + + seq_putc(seq, '\n'); +} + static int md_seq_show(struct seq_file *seq, void *v) { struct mddev *mddev; @@ -8453,7 +8480,7 @@ static int md_seq_show(struct seq_file *seq, void *v) } else seq_printf(seq, "\n "); - md_bitmap_status(seq, mddev->bitmap); + md_bitmap_status(seq, mddev); seq_printf(seq, "\n"); } -- 2.39.2