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f2fs: fix to avoid triggering IO in write path

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If we are in write IO path, we need to avoid using GFP_KERNEL.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2020-02-18 18:21:35 +08:00 committed by Jaegeuk Kim
parent 985100035e
commit 0683728ada
3 changed files with 15 additions and 13 deletions
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2
fs/f2fs/compress.c
View file

@ -656,7 +656,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
struct bio *bio = NULL;
ret = f2fs_read_multi_pages(cc, &bio, cc->cluster_size,
&last_block_in_bio, false);
&last_block_in_bio, false, true);
f2fs_destroy_compress_ctx(cc);
if (ret)
goto release_pages;

24
fs/f2fs/data.c
View file

@ -925,14 +925,15 @@ static inline bool f2fs_need_verity(const struct inode *inode, pgoff_t idx)
static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
unsigned nr_pages, unsigned op_flag,
pgoff_t first_idx)
pgoff_t first_idx, bool for_write)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct bio *bio;
struct bio_post_read_ctx *ctx;
unsigned int post_read_steps = 0;
bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES), false);
bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES),
for_write);
if (!bio)
return ERR_PTR(-ENOMEM);
f2fs_target_device(sbi, blkaddr, bio);
@ -967,12 +968,12 @@ static void f2fs_release_read_bio(struct bio *bio)
/* This can handle encryption stuffs */
static int f2fs_submit_page_read(struct inode *inode, struct page *page,
block_t blkaddr)
block_t blkaddr, bool for_write)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct bio *bio;
bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0, page->index);
bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0, page->index, for_write);
if (IS_ERR(bio))
return PTR_ERR(bio);
@ -1158,7 +1159,7 @@ struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
return page;
}
err = f2fs_submit_page_read(inode, page, dn.data_blkaddr);
err = f2fs_submit_page_read(inode, page, dn.data_blkaddr, for_write);
if (err)
goto put_err;
return page;
@ -1971,7 +1972,8 @@ static int f2fs_read_single_page(struct inode *inode, struct page *page,
}
if (bio == NULL) {
bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
is_readahead ? REQ_RAHEAD : 0, page->index);
is_readahead ? REQ_RAHEAD : 0, page->index,
false);
if (IS_ERR(bio)) {
ret = PTR_ERR(bio);
bio = NULL;
@ -2006,7 +2008,7 @@ static int f2fs_read_single_page(struct inode *inode, struct page *page,
#ifdef CONFIG_F2FS_FS_COMPRESSION
int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
unsigned nr_pages, sector_t *last_block_in_bio,
bool is_readahead)
bool is_readahead, bool for_write)
{
struct dnode_of_data dn;
struct inode *inode = cc->inode;
@ -2100,7 +2102,7 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
if (!bio) {
bio = f2fs_grab_read_bio(inode, blkaddr, nr_pages,
is_readahead ? REQ_RAHEAD : 0,
page->index);
page->index, for_write);
if (IS_ERR(bio)) {
ret = PTR_ERR(bio);
bio = NULL;
@ -2201,7 +2203,7 @@ int f2fs_mpage_readpages(struct address_space *mapping,
ret = f2fs_read_multi_pages(&cc, &bio,
max_nr_pages,
&last_block_in_bio,
is_readahead);
is_readahead, false);
f2fs_destroy_compress_ctx(&cc);
if (ret)
goto set_error_page;
@ -2244,7 +2246,7 @@ int f2fs_mpage_readpages(struct address_space *mapping,
ret = f2fs_read_multi_pages(&cc, &bio,
max_nr_pages,
&last_block_in_bio,
is_readahead);
is_readahead, false);
f2fs_destroy_compress_ctx(&cc);
}
}
@ -3274,7 +3276,7 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,
err = -EFSCORRUPTED;
goto fail;
}
err = f2fs_submit_page_read(inode, page, blkaddr);
err = f2fs_submit_page_read(inode, page, blkaddr, true);
if (err)
goto fail;

2
fs/f2fs/f2fs.h
View file

@ -3796,7 +3796,7 @@ int f2fs_write_multi_pages(struct compress_ctx *cc,
int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index);
int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
unsigned nr_pages, sector_t *last_block_in_bio,
bool is_readahead);
bool is_readahead, bool for_write);
struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc);
void f2fs_free_dic(struct decompress_io_ctx *dic);
void f2fs_decompress_end_io(struct page **rpages,