ecryptfs_read_headers_virt(9)

💅 ecryptfs_read_headers_virt — the kernel API manual, bestie edition

okay so real talk, this one's from the Kernel API Manual and it's ecryptfs_read_headers_virt(9). yes the name is a mouthful, no we're not changing it, it's iconic actually. 🎀

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✨ SYNOPSIS ✨

int ecryptfs_read_headers_virt (char *page_virt , struct
       ecryptfs_crypt_stat *crypt_stat , struct dentry *ecryptfs_dentry , int
       validate_header_size );

four args, one int coming back at you, let's go 🦋

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🌸 ARGUMENTS 🌸

• page_virt — the virtual address where the headers get read into. that's the drop spot, the destination, the whole point 🫶
• crypt_stat — the cryptographic context. the crypto of it all, if you will 💜
• ecryptfs_dentry — the eCryptfs dentry. yes that dentry 👑
• validate_header_size — whether to validate the header size while reading. it's giving "do we double-check or do we vibe" and the answer is literally up to this flag 😭

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💖 DESCRIPTION 💖

so what it does: reads and parses the header data. that's the whole job, no cap. ✨

and if you're sitting there like "okay but what does the header actually look like" — the header format is detailed in the comment block for the ecryptfs_write_headers_virt function. so like, go read that comment block, bestie, it's all there, iykyk 📖

Returns zero on success — zero is the good number here, zero is slay, zero is the goal 🌈

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🔥 SEE ALSO 🔥

kernel file ./fs/ecryptfs/crypto.c — and the whole friend group:

• ecryptfs_from_hex(9)
• ecryptfs_derive_iv(9)
• ecryptfs_init_crypt_stat(9)
• ecryptfs_destroy_crypt_stat(9)
• virt_to_scatterlist(9)
• crypt_scatterlist(9)
• crypt_extent(9)
• ecryptfs_encrypt_page(9)
• ecryptfs_decrypt_page(9)
• ecryptfs_init_crypt_ctx(9)
• ecryptfs_copy_mount_wide_flags_to_inode_flags(9)
• ecryptfs_set_default_crypt_stat_vals(9)
• ecryptfs_new_file_context(9)
• ecryptfs_validate_marker(9)
• ecryptfs_process_flags(9)
• write_ecryptfs_marker(9)
• ecryptfs_code_for_cipher_string(9)
• ecryptfs_cipher_code_to_string(9)
• ecryptfs_write_headers_virt(9)
• ecryptfs_write_metadata(9)
• set_default_header_data(9)
• ecryptfs_read_xattr_region(9)
• ecryptfs_process_key_cipher(9)
• ecryptfs_destroy_crypto(9)
• ecryptfs_tfm_exists(9)
• ecryptfs_get_tfm_and_mutex_for_cipher_name(9)
• ecryptfs_encode_for_filename(9)
• ecryptfs_decode_from_filename(9)
• ecryptfs_encrypt_and_encode_filename(9)
• ecryptfs_decode_and_decrypt_filename(9)

that's a long list and honestly? every single one of them ate 💅

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and that's the page!! 🧚 shoutout to ./fs/ecryptfs, dated October 2026, churning out ecryptfs_read_headers_virt(9) for the kernel girlies 💖✨