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Jan Kara
fffca572f9
Some filesystems need to treat some folios specially (for example for inodes with inline data). Doing the handling in their .writepages method in a race-free manner results in duplicating some of the writeback internals. So provide generalized version of mpage_writepages() that allows filesystem to provide a handler called for each folio which can handle the folio in a special way. Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://patch.msgid.link/20260326140635.15895-3-jack@suse.cz Signed-off-by: Jan Kara <jack@suse.cz>
31 lines
912 B
C
31 lines
912 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* include/linux/mpage.h
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*
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* Contains declarations related to preparing and submitting BIOS which contain
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* multiple pagecache pages.
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*/
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/*
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* (And no, it doesn't do the #ifdef __MPAGE_H thing, and it doesn't do
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* nested includes. Get it right in the .c file).
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*/
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#ifdef CONFIG_BLOCK
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struct writeback_control;
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struct readahead_control;
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void mpage_readahead(struct readahead_control *, get_block_t get_block);
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int mpage_read_folio(struct folio *folio, get_block_t get_block);
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int __mpage_writepages(struct address_space *mapping,
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struct writeback_control *wbc, get_block_t get_block,
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int (*write_folio)(struct folio *folio,
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struct writeback_control *wbc));
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static inline int mpage_writepages(struct address_space *mapping,
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struct writeback_control *wbc, get_block_t get_block)
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{
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return __mpage_writepages(mapping, wbc, get_block, NULL);
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}
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#endif
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