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ecryptfs: use filemap_dirty_folio for address space operations

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ecryptfs does not use buffer_heads. The legacy block_dirty_folio and
block_invalidate_folio mapping operations were only added as a
temporary compatibility fallback under CONFIG_BLOCK.

Since ecryptfs does not attach private metadata (such as buffer_heads)
to its folios, block_dirty_folio is unnecessary.

Modernize ecryptfs to use filemap_dirty_folio for its dirty_folio
address space operation. This allows removing the block_dirty_folio
and block_invalidate_folio fallbacks, removing the buffer_head header
include, and removing the CONFIG_BLOCK dependency inside ecryptfs_aops.

Signed-off-by: Aditya Prakash Srivastava <aditya.ansh182@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tyler Hicks <code@tyhicks.com>
This commit is contained in:
Aditya Prakash Srivastava
2026-07-20 22:12:46 -05:00
committed by Tyler Hicks
parent 8fafd7c86f
commit 21a6287ae2
1 changed files with 1 additions and 14 deletions
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fs/ecryptfs/mmap.c
+1 -14
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@@ -503,21 +503,8 @@ static sector_t ecryptfs_bmap(struct address_space *mapping, sector_t block)
return block;
}
#include <linux/buffer_head.h>
const struct address_space_operations ecryptfs_aops = {
/*
* XXX: This is pretty broken for multiple reasons: ecryptfs does not
* actually use buffer_heads, and ecryptfs will crash without
* CONFIG_BLOCK. But it matches the behavior before the default for
* address_space_operations without the ->dirty_folio method was
* cleaned up, so this is the best we can do without maintainer
* feedback.
*/
#ifdef CONFIG_BLOCK
.dirty_folio = block_dirty_folio,
.invalidate_folio = block_invalidate_folio,
#endif
.dirty_folio = filemap_dirty_folio,
.writepages = ecryptfs_writepages,
.read_folio = ecryptfs_read_folio,
.write_begin = ecryptfs_write_begin,