simple_fsync(9)

✨ simple_fsync(9) ✨

okay so this is a page straight out of the Kernel API Manual and honestly? it's kind of a vibe. it's short, it's sweet, it's doing exactly one job and doing it well. let's get into it bestie 💅

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🌸 NAME 🌸

simple_fsync — the fsync implementation for simple filesystems with flush. that's it. that's the whole brand. no cap 🎀

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✨ SYNOPSIS ✨

int simple_fsync (struct file *file , loff_t start , loff_t end , int
datasync );

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🎀 ARGUMENTS 🎀

four args, all of them pulling their weight 🫶

• file — the file you wanna synchronize. literally the main character of this function call ✨
• start — start offset, in bytes. where the party begins 💖
• end — end offset, in bytes, and yes it's inclusive (so the last byte gets an invite too) 🎀
• datasync — if this is true, you only synchronize essential metadata. lowkey a minimal-effort mode, highkey useful 🌸

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💖 DESCRIPTION 💖

so simple_fsync is an fsync handler for simple filesystems. that's its whole thing 💅

what does it actually do? the way it: it writes out dirty data, it writes out the inode (only if that inode is dirty, it's not doing extra work for nobody), and then it issues a cache flush. that's the trifecta, that's the whole routine 🔥

no cap, that's the entire description. it's giving "small function, big responsibility" energy and we're obsessed 😭

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🦋 SEE ALSO 🦋

this is the friend group, the whole group chat, everyone's invited 🫶 the kernel file lives at ./fs/libfs.c and here's everybody it wants you to meet:

• simple_offset_init(9)
• simple_offset_add(9)
• simple_offset_remove(9)
• simple_offset_rename(9)
• simple_offset_rename_exchange(9)
• simple_offset_destroy(9)
• offset_dir_llseek(9)
• offset_readdir(9)
• simple_rename_timestamp(9)
• simple_setattr(9)
• simple_write_end(9)
• simple_read_from_buffer(9)
• simple_write_to_buffer(9)
• memory_read_from_buffer(9)
• generic_encode_ino32_fh(9)
• generic_fh_to_dentry(9)
• generic_fh_to_parent(9)
• simple_fsync_noflush(9)
• generic_check_addressable(9)
• simple_get_link(9)
• generic_ci_d_compare(9)
• generic_ci_d_hash(9)
• generic_ci_match(9)
• generic_set_sb_d_ops(9)
• inode_maybe_inc_iversion(9)
• inode_query_iversion(9)
• simple_inode_init_ts(9)
• path_from_stashed(9)
• simple_start_creating(9)

like, go read them too, they're all icons in their own right 👑💜

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ok that's the page!! this one came from ./fs and it's dated October 2026 — so yeah, mark your calendar bestie, the manpage said so 📅✨ mwah, bye! 💖🧚🌸

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