ext4_count_free_clusters(9)

✨ NAME ✨

Okay so bestie, meet ext4_count_free_clusters(9) from the Kernel API Manual. Its whole name-and-mission situation is literally ext4_count_free_clusters - - count filesystem free clusters. No cap. 💖

🎀 SYNOPSIS 🎀

ext4_fsblk_t ext4_count_free_clusters (struct super_block *sb );

🦋 ARGUMENTS 🦋

• sb — superblock. Yep, that's the one and only argument, bestie. 💅

🌸 DESCRIPTION 🌸

It adds up the number of free clusters from each block group. That's the tea. ✨

🫶 SEE ALSO 🫶

Go give these iconic friends a read:

• Kernel file ./fs/ext4/balloc.c
• ext4_get_group_desc(9)
• ext4_read_block_bitmap_nowait(9)
• ext4_has_free_clusters(9)
• ext4_should_retry_alloc(9)
• ext4_bg_has_super(9)
• ext4_bg_num_gdb(9)
• ext4_inode_to_goal_block(9)

Sign-off time, bestie: this little page comes from source/version ./fs/ext4, dated October 2026, and it's literally called ext4_count_free_clusters(9). Mwah 💋✨