f2fs: Cache zoned block devices zone type

[karo-tx-linux.git] / fs / f2fs / super.c

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 3312284aa2454de55b34c77ed17b06587491cc27..12a4f3f44a2fec58fb68215b839850cc34d44166 100644 (file)
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1511,6 +1511,65 @@ static int init_percpu_info(struct f2fs_sb_info *sbi)
                                                                GFP_KERNEL);
 }
 
+#ifdef CONFIG_BLK_DEV_ZONED
+static int init_blkz_info(struct f2fs_sb_info *sbi)
+{
+       struct block_device *bdev = sbi->sb->s_bdev;
+       sector_t nr_sectors = bdev->bd_part->nr_sects;
+       sector_t sector = 0;
+       struct blk_zone *zones;
+       unsigned int i, nr_zones;
+       unsigned int n = 0;
+       int err = -EIO;
+
+       if (!f2fs_sb_mounted_blkzoned(sbi->sb))
+               return 0;
+
+       sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_size(bdev));
+       sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
+       sbi->nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
+               sbi->log_blocks_per_blkz;
+       if (nr_sectors & (bdev_zone_size(bdev) - 1))
+               sbi->nr_blkz++;
+
+       sbi->blkz_type = kmalloc(sbi->nr_blkz, GFP_KERNEL);
+       if (!sbi->blkz_type)
+               return -ENOMEM;
+
+#define F2FS_REPORT_NR_ZONES   4096
+
+       zones = kcalloc(F2FS_REPORT_NR_ZONES, sizeof(struct blk_zone),
+                       GFP_KERNEL);
+       if (!zones)
+               return -ENOMEM;
+
+       /* Get block zones type */
+       while (zones && sector < nr_sectors) {
+
+               nr_zones = F2FS_REPORT_NR_ZONES;
+               err = blkdev_report_zones(bdev, sector,
+                                         zones, &nr_zones,
+                                         GFP_KERNEL);
+               if (err)
+                       break;
+               if (!nr_zones) {
+                       err = -EIO;
+                       break;
+               }
+
+               for (i = 0; i < nr_zones; i++) {
+                       sbi->blkz_type[n] = zones[i].type;
+                       sector += zones[i].len;
+                       n++;
+               }
+       }
+
+       kfree(zones);
+
+       return err;
+}
+#endif
+
 /*
  * Read f2fs raw super block.
  * Because we have two copies of super block, so read both of them
@@ -1757,6 +1816,15 @@ try_onemore:
 
        init_ino_entry_info(sbi);
 
+#ifdef CONFIG_BLK_DEV_ZONED
+       err = init_blkz_info(sbi);
+       if (err) {
+               f2fs_msg(sb, KERN_ERR,
+                       "Failed to initialize F2FS blkzone information");
+               goto free_blkz;
+       }
+#endif
+
        /* setup f2fs internal modules */
        err = build_segment_manager(sbi);
        if (err) {
@@ -1935,6 +2003,10 @@ free_nm:
        destroy_node_manager(sbi);
 free_sm:
        destroy_segment_manager(sbi);
+#ifdef CONFIG_BLK_DEV_ZONED
+free_blkz:
+       kfree(sbi->blkz_type);
+#endif
        kfree(sbi->ckpt);
 free_meta_inode:
        make_bad_inode(sbi->meta_inode);