From 675f02e5e65651553c945a464e4f7630859f2032 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Sat, 20 Apr 2024 03:50:17 +0100 Subject: [PATCH] squashfs: convert squashfs_symlink_read_folio to use folio APIs Remove use of page APIs, return the errno instead of 0, switch from kmap_atomic to kmap_local and use folio_end_read() to unify the two exit paths. Link: https://lkml.kernel.org/r/20240420025029.2166544-23-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Tested-by: Phillip Lougher Reviewed-by: Phillip Lougher Signed-off-by: Andrew Morton --- fs/squashfs/symlink.c | 35 ++++++++++++++++------------------- 1 file changed, 16 insertions(+), 19 deletions(-) diff --git a/fs/squashfs/symlink.c b/fs/squashfs/symlink.c index 2bf977a52c2c..6ef735bd841a 100644 --- a/fs/squashfs/symlink.c +++ b/fs/squashfs/symlink.c @@ -32,20 +32,19 @@ static int squashfs_symlink_read_folio(struct file *file, struct folio *folio) { - struct page *page = &folio->page; - struct inode *inode = page->mapping->host; + struct inode *inode = folio->mapping->host; struct super_block *sb = inode->i_sb; struct squashfs_sb_info *msblk = sb->s_fs_info; - int index = page->index << PAGE_SHIFT; + int index = folio_pos(folio); u64 block = squashfs_i(inode)->start; int offset = squashfs_i(inode)->offset; int length = min_t(int, i_size_read(inode) - index, PAGE_SIZE); - int bytes, copied; + int bytes, copied, error; void *pageaddr; struct squashfs_cache_entry *entry; TRACE("Entered squashfs_symlink_readpage, page index %ld, start block " - "%llx, offset %x\n", page->index, block, offset); + "%llx, offset %x\n", folio->index, block, offset); /* * Skip index bytes into symlink metadata. @@ -57,14 +56,15 @@ static int squashfs_symlink_read_folio(struct file *file, struct folio *folio) ERROR("Unable to read symlink [%llx:%x]\n", squashfs_i(inode)->start, squashfs_i(inode)->offset); - goto error_out; + error = bytes; + goto out; } } /* * Read length bytes from symlink metadata. Squashfs_read_metadata * is not used here because it can sleep and we want to use - * kmap_atomic to map the page. Instead call the underlying + * kmap_local to map the folio. Instead call the underlying * squashfs_cache_get routine. As length bytes may overlap metadata * blocks, we may need to call squashfs_cache_get multiple times. */ @@ -75,29 +75,26 @@ static int squashfs_symlink_read_folio(struct file *file, struct folio *folio) squashfs_i(inode)->start, squashfs_i(inode)->offset); squashfs_cache_put(entry); - goto error_out; + error = entry->error; + goto out; } - pageaddr = kmap_atomic(page); + pageaddr = kmap_local_folio(folio, 0); copied = squashfs_copy_data(pageaddr + bytes, entry, offset, length - bytes); if (copied == length - bytes) memset(pageaddr + length, 0, PAGE_SIZE - length); else block = entry->next_index; - kunmap_atomic(pageaddr); + kunmap_local(pageaddr); squashfs_cache_put(entry); } - flush_dcache_page(page); - SetPageUptodate(page); - unlock_page(page); - return 0; - -error_out: - SetPageError(page); - unlock_page(page); - return 0; + flush_dcache_folio(folio); + error = 0; +out: + folio_end_read(folio, error == 0); + return error; }