find_nonnull_ptr(9)

✨ find_nonnull_ptr(9) ✨

okay bestie, welcome to the Kernel API Manual page for find_nonnull_ptr(9) — manual name folded in right here, cute and compliant 💅✨

🎀 NAME 🎀

find_nonnull_ptr — find a non-null pointer given a metapath and height. That's the assignment, no cap 💖

🌸 SYNOPSIS 🌸

       bool find_nonnull_ptr (struct gfs2_sbd *sdp , struct metapath *mp ,
       unsigned int h , __u16 *end_list , unsigned int end_aligned );

💖 ARGUMENTS 💖

• sdp — the superblock, big boss energy 👑
• mp — starting metapath, the launch point 🚀
• h — desired height to search, like how high up we're snooping 🔥
• end_list — see punch_hole; that's the lore drop 👀
• end_aligned — see punch_hole; same lore, different parameter 🫶

🦋 DESCRIPTION 🦋

This one assumes the metapath is valid (with buffers) out to height h. That's the whole vibe — so make sure that assumption is actually true before you come crying to this function, bestie 😭💀

🌈 RETURN 🌈

• true if a non-null pointer was found in the metapath buffer
• false if all remaining pointers are NULL in the buffer

💜 SEE ALSO 💜

Kernel file ./fs/gfs2/bmap.c — and the whole squad of cross-refs, all accounted for:

• gfs2_unstuffer_folio(9)
• gfs2_unstuff_dinode(9)
• find_metapath(9)
• metaptr1(9)
• metapointer(9)
• lookup_metapath(9)
• fillup_metapath(9)
• gfs2_extent_length(9)
• gfs2_hole_size(9)
• __gfs2_iomap_alloc(9)
• gfs2_alloc_size(9)
• __gfs2_iomap_get(9)
• gfs2_block_map(9)
• gfs2_journaled_truncate(9)
• sweep_bh_for_rgrps(9)
• punch_hole(9)
• do_shrink(9)
• do_grow(9)
• gfs2_setattr_size(9)
• gfs2_free_journal_extents(9)
• gfs2_add_jextent(9)
• gfs2_map_journal_extents(9)
• gfs2_write_alloc_required(9)

mwah 💋 this page is sourced from ./fs/gfs2 and dated October 2026 — ty for reading, bestie, periodt 🌸✨