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SubjectRe: [RFC PATCH v5] f2fs: support data compression
On 01/02, Jaegeuk Kim wrote:
> On 12/31, Chao Yu wrote:
> > On 2019/12/31 8:46, Jaegeuk Kim wrote:
> > > On 12/23, Chao Yu wrote:
> > >> Hi Jaegeuk,
> > >>
> > >> Sorry for the delay.
> > >>
> > >> On 2019/12/19 5:46, Jaegeuk Kim wrote:
> > >>> Hi Chao,
> > >>>
> > >>> I still see some diffs from my latest testing version, so please check anything
> > >>> that you made additionally from here.
> > >>>
> > >>> https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git/commit/?h=dev&id=25d18e19a91e60837d36368ee939db13fd16dc64
> > >>
> > >> I've checked the diff and picked up valid parts, could you please check and
> > >> comment on it?
> > >>
> > >> ---
> > >> fs/f2fs/compress.c | 8 ++++----
> > >> fs/f2fs/data.c | 18 +++++++++++++++---
> > >> fs/f2fs/f2fs.h | 3 +++
> > >> fs/f2fs/file.c | 1 -
> > >> 4 files changed, 22 insertions(+), 8 deletions(-)
> > >>
> > >> diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
> > >> index af23ed6deffd..1bc86a54ad71 100644
> > >> --- a/fs/f2fs/compress.c
> > >> +++ b/fs/f2fs/compress.c
> > >> @@ -593,7 +593,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
> > >> fgp_flag, GFP_NOFS);
> > >> if (!page) {
> > >> ret = -ENOMEM;
> > >> - goto unlock_pages;
> > >> + goto release_pages;
> > >> }
> > >>
> > >> if (PageUptodate(page))
> > >> @@ -608,13 +608,13 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
> > >> ret = f2fs_read_multi_pages(cc, &bio, cc->cluster_size,
> > >> &last_block_in_bio, false);
> > >> if (ret)
> > >> - goto release_pages;
> > >> + goto unlock_pages;
> > >> if (bio)
> > >> f2fs_submit_bio(sbi, bio, DATA);
> > >>
> > >> ret = f2fs_init_compress_ctx(cc);
> > >> if (ret)
> > >> - goto release_pages;
> > >> + goto unlock_pages;
> > >> }
> > >>
> > >> for (i = 0; i < cc->cluster_size; i++) {
> > >> @@ -762,7 +762,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
> > >> if (err)
> > >> goto out_unlock_op;
> > >>
> > >> - psize = (cc->rpages[last_index]->index + 1) << PAGE_SHIFT;
> > >> + psize = (loff_t)(cc->rpages[last_index]->index + 1) << PAGE_SHIFT;
> > >>
> > >> err = f2fs_get_node_info(fio.sbi, dn.nid, &ni);
> > >> if (err)
> > >> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> > >> index 19cd03450066..f1f5c701228d 100644
> > >> --- a/fs/f2fs/data.c
> > >> +++ b/fs/f2fs/data.c
> > >> @@ -184,13 +184,18 @@ static void f2fs_decompress_work(struct bio_post_read_ctx *ctx)
> > >> }
> > >>
> > >> #ifdef CONFIG_F2FS_FS_COMPRESSION
> > >> +void f2fs_verify_pages(struct page **rpages, unsigned int cluster_size)
> > >> +{
> > >> + f2fs_decompress_end_io(rpages, cluster_size, false, true);
> > >> +}
> > >> +
> > >> static void f2fs_verify_bio(struct bio *bio)
> > >> {
> > >> struct page *page = bio_first_page_all(bio);
> > >> struct decompress_io_ctx *dic =
> > >> (struct decompress_io_ctx *)page_private(page);
> > >>
> > >> - f2fs_decompress_end_io(dic->rpages, dic->cluster_size, false, true);
> > >> + f2fs_verify_pages(dic->rpages, dic->cluster_size);
> > >> f2fs_free_dic(dic);
> > >> }
> > >> #endif
> > >> @@ -507,10 +512,16 @@ static bool __has_merged_page(struct bio *bio, struct inode *inode,
> > >> bio_for_each_segment_all(bvec, bio, iter_all) {
> > >> struct page *target = bvec->bv_page;
> > >>
> > >> - if (fscrypt_is_bounce_page(target))
> > >> + if (fscrypt_is_bounce_page(target)) {
> > >> target = fscrypt_pagecache_page(target);
> > >> - if (f2fs_is_compressed_page(target))
> > >> + if (IS_ERR(target))
> > >> + continue;
> > >> + }
> > >> + if (f2fs_is_compressed_page(target)) {
> > >> target = f2fs_compress_control_page(target);
> > >> + if (IS_ERR(target))
> > >> + continue;
> > >> + }
> > >>
> > >> if (inode && inode == target->mapping->host)
> > >> return true;
> > >> @@ -2039,6 +2050,7 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
> > >> if (ret)
> > >> goto out;
> > >>
> > >> + /* cluster was overwritten as normal cluster */
> > >> if (dn.data_blkaddr != COMPRESS_ADDR)
> > >> goto out;
> > >>
> > >> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> > >> index 5d55cef66410..17d2af4eeafb 100644
> > >> --- a/fs/f2fs/f2fs.h
> > >> +++ b/fs/f2fs/f2fs.h
> > >> @@ -2719,6 +2719,7 @@ static inline void set_compress_context(struct inode *inode)
> > >> 1 << F2FS_I(inode)->i_log_cluster_size;
> > >> F2FS_I(inode)->i_flags |= F2FS_COMPR_FL;
> > >> set_inode_flag(inode, FI_COMPRESSED_FILE);
> > >> + stat_inc_compr_inode(inode);
> > >> }
> > >>
> > >> static inline unsigned int addrs_per_inode(struct inode *inode)
> > >> @@ -3961,6 +3962,8 @@ static inline bool f2fs_force_buffered_io(struct inode *inode,
> > >> return true;
> > >> if (f2fs_is_multi_device(sbi))
> > >> return true;
> > >> + if (f2fs_compressed_file(inode))
> > >> + return true;
> > >> /*
> > >> * for blkzoned device, fallback direct IO to buffered IO, so
> > >> * all IOs can be serialized by log-structured write.
> > >> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> > >> index bde5612f37f5..9aeadf14413c 100644
> > >> --- a/fs/f2fs/file.c
> > >> +++ b/fs/f2fs/file.c
> > >> @@ -1828,7 +1828,6 @@ static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask)
> > >> return -EINVAL;
> > >>
> > >> set_compress_context(inode);
> > >> - stat_inc_compr_inode(inode);
> > >
> > > As this breaks the count, I'll keep as is.
> >
> > @@ -2719,6 +2719,7 @@ static inline void set_compress_context(struct inode *inode)
> > 1 << F2FS_I(inode)->i_log_cluster_size;
> > F2FS_I(inode)->i_flags |= F2FS_COMPR_FL;
> > set_inode_flag(inode, FI_COMPRESSED_FILE);
> > + stat_inc_compr_inode(inode);
> >
> > If I'm not missing anything, stat_inc_compr_inode() should be called inside
> > set_compress_context() in where we convert normal inode to compress one,
> > right?
>
> I don't care much whether that's right or not. If we want to do that, I found
> another line to remove in f2fs_create(). Let me give it a try.
>
> Thanks,
>

This works to me. Could you run fsstress tests on compressed root directory?
It seems still there are some bugs.

---
fs/f2fs/compress.c | 14 ++++++++++----
fs/f2fs/data.c | 25 ++++++++++++++++++++++---
fs/f2fs/f2fs.h | 31 +++++++++++++++++--------------
fs/f2fs/file.c | 1 -
fs/f2fs/namei.c | 1 -
5 files changed, 49 insertions(+), 23 deletions(-)

diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index af23ed6deffd..fa67ffd9d79d 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -593,7 +593,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
fgp_flag, GFP_NOFS);
if (!page) {
ret = -ENOMEM;
- goto unlock_pages;
+ goto release_pages;
}

if (PageUptodate(page))
@@ -608,13 +608,13 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
ret = f2fs_read_multi_pages(cc, &bio, cc->cluster_size,
&last_block_in_bio, false);
if (ret)
- goto release_pages;
+ goto unlock_pages;
if (bio)
f2fs_submit_bio(sbi, bio, DATA);

ret = f2fs_init_compress_ctx(cc);
if (ret)
- goto release_pages;
+ goto unlock_pages;
}

for (i = 0; i < cc->cluster_size; i++) {
@@ -762,7 +762,13 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
if (err)
goto out_unlock_op;

- psize = (cc->rpages[last_index]->index + 1) << PAGE_SHIFT;
+ for (i = 0; i < cc->cluster_size; i++) {
+ if (datablock_addr(dn.inode, dn.node_page,
+ dn.ofs_in_node + i) == NULL_ADDR)
+ goto out_put_dnode;
+ }
+
+ psize = (loff_t)(cc->rpages[last_index]->index + 1) << PAGE_SHIFT;

err = f2fs_get_node_info(fio.sbi, dn.nid, &ni);
if (err)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 356642e8c3b3..5476d33f2d76 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -184,13 +184,18 @@ static void f2fs_decompress_work(struct bio_post_read_ctx *ctx)
}

#ifdef CONFIG_F2FS_FS_COMPRESSION
+void f2fs_verify_pages(struct page **rpages, unsigned int cluster_size)
+{
+ f2fs_decompress_end_io(rpages, cluster_size, false, true);
+}
+
static void f2fs_verify_bio(struct bio *bio)
{
struct page *page = bio_first_page_all(bio);
struct decompress_io_ctx *dic =
(struct decompress_io_ctx *)page_private(page);

- f2fs_decompress_end_io(dic->rpages, dic->cluster_size, false, true);
+ f2fs_verify_pages(dic->rpages, dic->cluster_size);
f2fs_free_dic(dic);
}
#endif
@@ -520,10 +525,16 @@ static bool __has_merged_page(struct bio *bio, struct inode *inode,
bio_for_each_segment_all(bvec, bio, iter_all) {
struct page *target = bvec->bv_page;

- if (fscrypt_is_bounce_page(target))
+ if (fscrypt_is_bounce_page(target)) {
target = fscrypt_pagecache_page(target);
- if (f2fs_is_compressed_page(target))
+ if (IS_ERR(target))
+ continue;
+ }
+ if (f2fs_is_compressed_page(target)) {
target = f2fs_compress_control_page(target);
+ if (IS_ERR(target))
+ continue;
+ }

if (inode && inode == target->mapping->host)
return true;
@@ -2049,6 +2060,7 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
if (ret)
goto out;

+ /* cluster was overwritten as normal cluster */
if (dn.data_blkaddr != COMPRESS_ADDR)
goto out;

@@ -2694,12 +2706,16 @@ static int f2fs_write_data_page(struct page *page,
#ifdef CONFIG_F2FS_FS_COMPRESSION
struct inode *inode = page->mapping->host;

+ if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
+ goto out;
+
if (f2fs_compressed_file(inode)) {
if (f2fs_is_compressed_cluster(inode, page->index)) {
redirty_page_for_writepage(wbc, page);
return AOP_WRITEPAGE_ACTIVATE;
}
}
+out:
#endif

return f2fs_write_single_data_page(page, NULL, NULL, NULL,
@@ -2809,6 +2825,9 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
goto result;
}

+ if (unlikely(f2fs_cp_error(sbi)))
+ goto lock_page;
+
if (f2fs_cluster_is_empty(&cc)) {
void *fsdata = NULL;
struct page *pagep;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index de494fc9d596..a95369e32876 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -2707,20 +2707,6 @@ static inline int f2fs_compressed_file(struct inode *inode)
is_inode_flag_set(inode, FI_COMPRESSED_FILE);
}

-static inline void set_compress_context(struct inode *inode)
-{
- struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
-
- F2FS_I(inode)->i_compress_algorithm =
- F2FS_OPTION(sbi).compress_algorithm;
- F2FS_I(inode)->i_log_cluster_size =
- F2FS_OPTION(sbi).compress_log_size;
- F2FS_I(inode)->i_cluster_size =
- 1 << F2FS_I(inode)->i_log_cluster_size;
- F2FS_I(inode)->i_flags |= F2FS_COMPR_FL;
- set_inode_flag(inode, FI_COMPRESSED_FILE);
-}
-
static inline unsigned int addrs_per_inode(struct inode *inode)
{
unsigned int addrs = CUR_ADDRS_PER_INODE(inode) -
@@ -3808,6 +3794,21 @@ static inline struct page *f2fs_compress_control_page(struct page *page)
}
#endif

+static inline void set_compress_context(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+
+ F2FS_I(inode)->i_compress_algorithm =
+ F2FS_OPTION(sbi).compress_algorithm;
+ F2FS_I(inode)->i_log_cluster_size =
+ F2FS_OPTION(sbi).compress_log_size;
+ F2FS_I(inode)->i_cluster_size =
+ 1 << F2FS_I(inode)->i_log_cluster_size;
+ F2FS_I(inode)->i_flags |= F2FS_COMPR_FL;
+ set_inode_flag(inode, FI_COMPRESSED_FILE);
+ stat_inc_compr_inode(inode);
+}
+
static inline u64 f2fs_disable_compressed_file(struct inode *inode)
{
struct f2fs_inode_info *fi = F2FS_I(inode);
@@ -3963,6 +3964,8 @@ static inline bool f2fs_force_buffered_io(struct inode *inode,
return true;
if (f2fs_is_multi_device(sbi))
return true;
+ if (f2fs_compressed_file(inode))
+ return true;
/*
* for blkzoned device, fallback direct IO to buffered IO, so
* all IOs can be serialized by log-structured write.
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index f66c4cd067f5..cd84b3d9aa17 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1831,7 +1831,6 @@ static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask)
return -EINVAL;

set_compress_context(inode);
- stat_inc_compr_inode(inode);
}
}
if ((iflags ^ fi->i_flags) & F2FS_NOCOMP_FL) {
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index cf3a286106ed..2aa035422c0f 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -348,7 +348,6 @@ static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
goto out;
f2fs_unlock_op(sbi);

- stat_inc_compr_inode(inode);
f2fs_alloc_nid_done(sbi, ino);

d_instantiate_new(dentry, inode);
--
2.24.0.525.g8f36a354ae-goog
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