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udf: Unify .read_folio for normal and in-ICB files 

Switching address_space_operations while a file is used is difficult to
do in a race-free way. To be able to use single address_space_operations
in UDF, make udf_read_folio() handle both normal and in-ICB files.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2023-01-24 11:40:28 +01:00
parent f54aa97fb7
commit b7c31e6f14
3 changed files with 13 additions and 13 deletions
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15
fs/udf/file.c
View File

@ -38,7 +38,7 @@
#include "udf_i.h"
#include "udf_sb.h"
static void __udf_adinicb_readpage(struct page *page)
void udf_adinicb_readpage(struct page *page)
{
struct inode *inode = page->mapping->host;
char *kaddr;
@ -57,15 +57,6 @@ static void __udf_adinicb_readpage(struct page *page)
kunmap_atomic(kaddr);
}
static int udf_adinicb_read_folio(struct file *file, struct folio *folio)
{
BUG_ON(!folio_test_locked(folio));
__udf_adinicb_readpage(&folio->page);
folio_unlock(folio);
return 0;
}
static int udf_adinicb_writepage(struct page *page,
struct writeback_control *wbc)
{
@ -100,7 +91,7 @@ static int udf_adinicb_write_begin(struct file *file,
*pagep = page;
if (!PageUptodate(page))
__udf_adinicb_readpage(page);
udf_adinicb_readpage(page);
return 0;
}
@ -127,7 +118,7 @@ static int udf_adinicb_write_end(struct file *file, struct address_space *mappin
const struct address_space_operations udf_adinicb_aops = {
.dirty_folio = block_dirty_folio,
.invalidate_folio = block_invalidate_folio,
.read_folio = udf_adinicb_read_folio,
.read_folio = udf_read_folio,
.writepage = udf_adinicb_writepage,
.write_begin = udf_adinicb_write_begin,
.write_end = udf_adinicb_write_end,

9
fs/udf/inode.c
View File

@ -191,8 +191,15 @@ static int udf_writepages(struct address_space *mapping,
return mpage_writepages(mapping, wbc, udf_get_block_wb);
}
static int udf_read_folio(struct file *file, struct folio *folio)
int udf_read_folio(struct file *file, struct folio *folio)
{
struct udf_inode_info *iinfo = UDF_I(file_inode(file));
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
udf_adinicb_readpage(&folio->page);
folio_unlock(folio);
return 0;
}
return mpage_read_folio(folio, udf_get_block);
}

2
fs/udf/udfdecl.h
View File

@ -138,6 +138,7 @@ static inline unsigned int udf_dir_entry_len(struct fileIdentDesc *cfi)
/* file.c */
extern long udf_ioctl(struct file *, unsigned int, unsigned long);
void udf_adinicb_readpage(struct page *page);
/* inode.c */
extern struct inode *__udf_iget(struct super_block *, struct kernel_lb_addr *,
@ -158,6 +159,7 @@ extern struct buffer_head *udf_bread(struct inode *inode, udf_pblk_t block,
extern int udf_setsize(struct inode *, loff_t);
extern void udf_evict_inode(struct inode *);
extern int udf_write_inode(struct inode *, struct writeback_control *wbc);
int udf_read_folio(struct file *file, struct folio *folio);
extern int8_t inode_bmap(struct inode *, sector_t, struct extent_position *,
struct kernel_lb_addr *, uint32_t *, sector_t *);
int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);