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path: root/fs/hpfs/super.c
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Diffstat (limited to 'fs/hpfs/super.c')
-rw-r--r--fs/hpfs/super.c29
1 files changed, 22 insertions, 7 deletions
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index b8d01ef6f531..4534ff688b76 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -121,7 +121,7 @@ static void hpfs_put_super(struct super_block *s)
call_rcu(&hpfs_sb(s)->rcu, lazy_free_sbi);
}
-unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
+static unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
{
struct quad_buffer_head qbh;
unsigned long *bits;
@@ -129,7 +129,7 @@ unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
bits = hpfs_map_4sectors(s, secno, &qbh, 0);
if (!bits)
- return 0;
+ return (unsigned)-1;
count = bitmap_weight(bits, 2048 * BITS_PER_BYTE);
hpfs_brelse4(&qbh);
return count;
@@ -144,30 +144,45 @@ static unsigned count_bitmaps(struct super_block *s)
hpfs_prefetch_bitmap(s, n);
}
for (n = 0; n < n_bands; n++) {
+ unsigned c;
hpfs_prefetch_bitmap(s, n + COUNT_RD_AHEAD);
- count += hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n]));
+ c = hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n]));
+ if (c != (unsigned)-1)
+ count += c;
}
return count;
}
+unsigned hpfs_get_free_dnodes(struct super_block *s)
+{
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ if (sbi->sb_n_free_dnodes == (unsigned)-1) {
+ unsigned c = hpfs_count_one_bitmap(s, sbi->sb_dmap);
+ if (c == (unsigned)-1)
+ return 0;
+ sbi->sb_n_free_dnodes = c;
+ }
+ return sbi->sb_n_free_dnodes;
+}
+
static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct super_block *s = dentry->d_sb;
struct hpfs_sb_info *sbi = hpfs_sb(s);
u64 id = huge_encode_dev(s->s_bdev->bd_dev);
+
hpfs_lock(s);
- /*if (sbi->sb_n_free == -1) {*/
+ if (sbi->sb_n_free == (unsigned)-1)
sbi->sb_n_free = count_bitmaps(s);
- sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap);
- /*}*/
+
buf->f_type = s->s_magic;
buf->f_bsize = 512;
buf->f_blocks = sbi->sb_fs_size;
buf->f_bfree = sbi->sb_n_free;
buf->f_bavail = sbi->sb_n_free;
buf->f_files = sbi->sb_dirband_size / 4;
- buf->f_ffree = sbi->sb_n_free_dnodes;
+ buf->f_ffree = hpfs_get_free_dnodes(s);
buf->f_fsid.val[0] = (u32)id;
buf->f_fsid.val[1] = (u32)(id >> 32);
buf->f_namelen = 254;