[PATCH 5.18 0931/1095] f2fs: change the current atomic write way

Greg Kroah-Hartman
2022-08-15T22:58:18Z

From: Daeho Jeong <daehojeong@google.com>

[ Upstream commit 3db1de0e582c358dd013f3703cd55b5fe4076436 ]

Current atomic write has three major issues like below.
- keeps the updates in non-reclaimable memory space and they are even
hard to be migrated, which is not good for contiguous memory
allocation.
- disk spaces used for atomic files cannot be garbage collected, so
this makes it difficult for the filesystem to be defragmented.
- If atomic write operations hit the threshold of either memory usage
or garbage collection failure count, All the atomic write operations
will fail immediately.

To resolve the issues, I will keep a COW inode internally for all the
updates to be flushed from memory, when we need to flush them out in a
situation like high memory pressure. These COW inodes will be tagged
as orphan inodes to be reclaimed in case of sudden power-cut or system
failure during atomic writes.

Signed-off-by: Daeho Jeong <daehojeong@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/f2fs/data.c | 180 +++++++++++------
fs/f2fs/debug.c | 12 +-
fs/f2fs/f2fs.h | 33 +---
fs/f2fs/file.c | 49 ++---
fs/f2fs/gc.c | 27 +--
fs/f2fs/inode.c | 3 +-
fs/f2fs/namei.c | 28 ++-
fs/f2fs/node.c | 4 -
fs/f2fs/node.h | 1 -
fs/f2fs/segment.c | 380 ++++++++++++------------------------
fs/f2fs/segment.h | 4 +-
fs/f2fs/super.c | 6 +-
include/trace/events/f2fs.h | 22 ---
13 files changed, 303 insertions(+), 446 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 1862b03a9982..4c1603a79745 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -69,8 +69,7 @@ static bool __is_cp_guaranteed(struct page *page)

if (f2fs_is_compressed_page(page))
return false;
- if ((S_ISREG(inode->i_mode) &&
- (f2fs_is_atomic_file(inode) || IS_NOQUOTA(inode))) ||
+ if ((S_ISREG(inode->i_mode) && IS_NOQUOTA(inode)) ||
page_private_gcing(page))
return true;
return false;
@@ -2566,7 +2565,12 @@ int f2fs_do_write_data_page(struct f2fs_io_info *fio)
bool ipu_force = false;
int err = 0;

- set_new_dnode(&dn, inode, NULL, NULL, 0);
+ /* Use COW inode to make dnode_of_data for atomic write */
+ if (f2fs_is_atomic_file(inode))
+ set_new_dnode(&dn, F2FS_I(inode)->cow_inode, NULL, NULL, 0);
+ else
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+
if (need_inplace_update(fio) &&
f2fs_lookup_extent_cache(inode, page->index, &ei)) {
fio->old_blkaddr = ei.blk + page->index - ei.fofs;
@@ -2603,6 +2607,7 @@ int f2fs_do_write_data_page(struct f2fs_io_info *fio)
err = -EFSCORRUPTED;
goto out_writepage;
}
+
/*
* If current allocation needs SSR,
* it had better in-place writes for updated data.
@@ -3316,6 +3321,100 @@ static int prepare_write_begin(struct f2fs_sb_info *sbi,
return err;
}

+static int __find_data_block(struct inode *inode, pgoff_t index,
+ block_t *blk_addr)
+{
+ struct dnode_of_data dn;
+ struct page *ipage;
+ struct extent_info ei = {0, };
+ int err = 0;
+
+ ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
+ if (IS_ERR(ipage))
+ return PTR_ERR(ipage);
+
+ set_new_dnode(&dn, inode, ipage, ipage, 0);
+
+ if (f2fs_lookup_extent_cache(inode, index, &ei)) {
+ dn.data_blkaddr = ei.blk + index - ei.fofs;
+ } else {
+ /* hole case */
+ err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
+ if (err) {
+ dn.data_blkaddr = NULL_ADDR;
+ err = 0;
+ }
+ }
+ *blk_addr = dn.data_blkaddr;
+ f2fs_put_dnode(&dn);
+ return err;
+}
+
+static int __reserve_data_block(struct inode *inode, pgoff_t index,
+ block_t *blk_addr, bool *node_changed)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct dnode_of_data dn;
+ struct page *ipage;
+ int err = 0;
+
+ f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true);
+
+ ipage = f2fs_get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(ipage)) {
+ err = PTR_ERR(ipage);
+ goto unlock_out;
+ }
+ set_new_dnode(&dn, inode, ipage, ipage, 0);
+
+ err = f2fs_get_block(&dn, index);
+
+ *blk_addr = dn.data_blkaddr;
+ *node_changed = dn.node_changed;
+ f2fs_put_dnode(&dn);
+
+unlock_out:
+ f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false);
+ return err;
+}
+
+static int prepare_atomic_write_begin(struct f2fs_sb_info *sbi,
+ struct page *page, loff_t pos, unsigned int len,
+ block_t *blk_addr, bool *node_changed)
+{
+ struct inode *inode = page->mapping->host;
+ struct inode *cow_inode = F2FS_I(inode)->cow_inode;
+ pgoff_t index = page->index;
+ int err = 0;
+ block_t ori_blk_addr;
+
+ /* If pos is beyond the end of file, reserve a new block in COW inode */
+ if ((pos & PAGE_MASK) >= i_size_read(inode))
+ return __reserve_data_block(cow_inode, index, blk_addr,
+ node_changed);
+
+ /* Look for the block in COW inode first */
+ err = __find_data_block(cow_inode, index, blk_addr);
+ if (err)
+ return err;
+ else if (*blk_addr != NULL_ADDR)
+ return 0;
+
+ /* Look for the block in the original inode */
+ err = __find_data_block(inode, index, &ori_blk_addr);
+ if (err)
+ return err;
+
+ /* Finally, we should reserve a new block in COW inode for the update */
+ err = __reserve_data_block(cow_inode, index, blk_addr, node_changed);
+ if (err)
+ return err;
+
+ if (ori_blk_addr != NULL_ADDR)
+ *blk_addr = ori_blk_addr;
+ return 0;
+}
+
static int f2fs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -3324,7 +3423,7 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct page *page = NULL;
pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
- bool need_balance = false, drop_atomic = false;
+ bool need_balance = false;
block_t blkaddr = NULL_ADDR;
int err = 0;

@@ -3335,14 +3434,6 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,
goto fail;
}

- if ((f2fs_is_atomic_file(inode) &&
- !f2fs_available_free_memory(sbi, INMEM_PAGES)) ||
- is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
- err = -ENOMEM;
- drop_atomic = true;
- goto fail;
- }
-
/*
* We should check this at this moment to avoid deadlock on inode page
* and #0 page. The locking rule for inline_data conversion should be:
@@ -3390,7 +3481,11 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,

*pagep = page;

- err = prepare_write_begin(sbi, page, pos, len,
+ if (f2fs_is_atomic_file(inode))
+ err = prepare_atomic_write_begin(sbi, page, pos, len,
+ &blkaddr, &need_balance);
+ else
+ err = prepare_write_begin(sbi, page, pos, len,
&blkaddr, &need_balance);
if (err)
goto fail;
@@ -3446,8 +3541,6 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,
fail:
f2fs_put_page(page, 1);
f2fs_write_failed(inode, pos + len);
- if (drop_atomic)
- f2fs_drop_inmem_pages_all(sbi, false);
return err;
}

@@ -3491,8 +3584,12 @@ static int f2fs_write_end(struct file *file,
set_page_dirty(page);

if (pos + copied > i_size_read(inode) &&
- !f2fs_verity_in_progress(inode))
+ !f2fs_verity_in_progress(inode)) {
f2fs_i_size_write(inode, pos + copied);
+ if (f2fs_is_atomic_file(inode))
+ f2fs_i_size_write(F2FS_I(inode)->cow_inode,
+ pos + copied);
+ }
unlock_out:
f2fs_put_page(page, 1);
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
@@ -3525,9 +3622,6 @@ void f2fs_invalidate_folio(struct folio *folio, size_t offset, size_t length)
inode->i_ino == F2FS_COMPRESS_INO(sbi))
clear_page_private_data(&folio->page);

- if (page_private_atomic(&folio->page))
- return f2fs_drop_inmem_page(inode, &folio->page);
-
folio_detach_private(folio);
}

@@ -3537,10 +3631,6 @@ int f2fs_release_page(struct page *page, gfp_t wait)
if (PageDirty(page))
return 0;

- /* This is atomic written page, keep Private */
- if (page_private_atomic(page))
- return 0;
-
if (test_opt(F2FS_P_SB(page), COMPRESS_CACHE)) {
struct inode *inode = page->mapping->host;

@@ -3566,18 +3656,6 @@ static bool f2fs_dirty_data_folio(struct address_space *mapping,
folio_mark_uptodate(folio);
BUG_ON(folio_test_swapcache(folio));

- if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
- if (!page_private_atomic(&folio->page)) {
- f2fs_register_inmem_page(inode, &folio->page);
- return true;
- }
- /*
- * Previously, this page has been registered, we just
- * return here.
- */
- return false;
- }
-
if (!folio_test_dirty(folio)) {
filemap_dirty_folio(mapping, folio);
f2fs_update_dirty_folio(inode, folio);
@@ -3657,42 +3735,14 @@ static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
int f2fs_migrate_page(struct address_space *mapping,
struct page *newpage, struct page *page, enum migrate_mode mode)
{
- int rc, extra_count;
- struct f2fs_inode_info *fi = F2FS_I(mapping->host);
- bool atomic_written = page_private_atomic(page);
+ int rc, extra_count = 0;

BUG_ON(PageWriteback(page));

- /* migrating an atomic written page is safe with the inmem_lock hold */
- if (atomic_written) {
- if (mode != MIGRATE_SYNC)
- return -EBUSY;
- if (!mutex_trylock(&fi->inmem_lock))
- return -EAGAIN;
- }
-
- /* one extra reference was held for atomic_write page */
- extra_count = atomic_written ? 1 : 0;
rc = migrate_page_move_mapping(mapping, newpage,
page, extra_count);
- if (rc != MIGRATEPAGE_SUCCESS) {
- if (atomic_written)
- mutex_unlock(&fi->inmem_lock);
+ if (rc != MIGRATEPAGE_SUCCESS)
return rc;
- }
-
- if (atomic_written) {
- struct inmem_pages *cur;
-
- list_for_each_entry(cur, &fi->inmem_pages, list)
- if (cur->page == page) {
- cur->page = newpage;
- break;
- }
- mutex_unlock(&fi->inmem_lock);
- put_page(page);
- get_page(newpage);
- }

/* guarantee to start from no stale private field */
set_page_private(newpage, 0);
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index fcdf253cd211..65f0bcf498bb 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -91,7 +91,6 @@ static void update_general_status(struct f2fs_sb_info *sbi)
si->ndirty_files = sbi->ndirty_inode[FILE_INODE];
si->nquota_files = sbi->nquota_files;
si->ndirty_all = sbi->ndirty_inode[DIRTY_META];
- si->inmem_pages = get_pages(sbi, F2FS_INMEM_PAGES);
si->aw_cnt = sbi->atomic_files;
si->vw_cnt = atomic_read(&sbi->vw_cnt);
si->max_aw_cnt = atomic_read(&sbi->max_aw_cnt);
@@ -167,8 +166,6 @@ static void update_general_status(struct f2fs_sb_info *sbi)
si->alloc_nids = NM_I(sbi)->nid_cnt[PREALLOC_NID];
si->io_skip_bggc = sbi->io_skip_bggc;
si->other_skip_bggc = sbi->other_skip_bggc;
- si->skipped_atomic_files[BG_GC] = sbi->skipped_atomic_files[BG_GC];
- si->skipped_atomic_files[FG_GC] = sbi->skipped_atomic_files[FG_GC];
si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg)
* 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
/ 2;
@@ -296,7 +293,6 @@ static void update_mem_info(struct f2fs_sb_info *sbi)
sizeof(struct nat_entry);
si->cache_mem += NM_I(sbi)->nat_cnt[DIRTY_NAT] *
sizeof(struct nat_entry_set);
- si->cache_mem += si->inmem_pages * sizeof(struct inmem_pages);
for (i = 0; i < MAX_INO_ENTRY; i++)
si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry);
si->cache_mem += atomic_read(&sbi->total_ext_tree) *
@@ -491,10 +487,6 @@ static int stat_show(struct seq_file *s, void *v)
si->bg_data_blks);
seq_printf(s, " - node blocks : %d (%d)\n", si->node_blks,
si->bg_node_blks);
- seq_printf(s, "Skipped : atomic write %llu (%llu)\n",
- si->skipped_atomic_files[BG_GC] +
- si->skipped_atomic_files[FG_GC],
- si->skipped_atomic_files[BG_GC]);
seq_printf(s, "BG skip : IO: %u, Other: %u\n",
si->io_skip_bggc, si->other_skip_bggc);
seq_puts(s, "\nExtent Cache:\n");
@@ -519,9 +511,9 @@ static int stat_show(struct seq_file *s, void *v)
si->flush_list_empty,
si->nr_discarding, si->nr_discarded,
si->nr_discard_cmd, si->undiscard_blks);
- seq_printf(s, " - inmem: %4d, atomic IO: %4d (Max. %4d), "
+ seq_printf(s, " - atomic IO: %4d (Max. %4d), "
"volatile IO: %4d (Max. %4d)\n",
- si->inmem_pages, si->aw_cnt, si->max_aw_cnt,
+ si->aw_cnt, si->max_aw_cnt,
si->vw_cnt, si->max_vw_cnt);
seq_printf(s, " - compress: %4d, hit:%8d\n", si->compress_pages, si->compress_page_hit);
seq_printf(s, " - nodes: %4d in %4d\n",
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 9b89f26af1f3..13140b753ba1 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -716,7 +716,6 @@ enum {

enum {
GC_FAILURE_PIN,
- GC_FAILURE_ATOMIC,
MAX_GC_FAILURE
};

@@ -738,7 +737,6 @@ enum {
FI_UPDATE_WRITE, /* inode has in-place-update data */
FI_NEED_IPU, /* used for ipu per file */
FI_ATOMIC_FILE, /* indicate atomic file */
- FI_ATOMIC_COMMIT, /* indicate the state of atomical committing */
FI_VOLATILE_FILE, /* indicate volatile file */
FI_FIRST_BLOCK_WRITTEN, /* indicate #0 data block was written */
FI_DROP_CACHE, /* drop dirty page cache */
@@ -752,7 +750,6 @@ enum {
FI_EXTRA_ATTR, /* indicate file has extra attribute */
FI_PROJ_INHERIT, /* indicate file inherits projectid */
FI_PIN_FILE, /* indicate file should not be gced */
- FI_ATOMIC_REVOKE_REQUEST, /* request to drop atomic data */
FI_VERITY_IN_PROGRESS, /* building fs-verity Merkle tree */
FI_COMPRESSED_FILE, /* indicate file's data can be compressed */
FI_COMPRESS_CORRUPT, /* indicate compressed cluster is corrupted */
@@ -794,11 +791,9 @@ struct f2fs_inode_info {
#endif
struct list_head dirty_list; /* dirty list for dirs and files */
struct list_head gdirty_list; /* linked in global dirty list */
- struct list_head inmem_ilist; /* list for inmem inodes */
- struct list_head inmem_pages; /* inmemory pages managed by f2fs */
- struct task_struct *inmem_task; /* store inmemory task */
- struct mutex inmem_lock; /* lock for inmemory pages */
+ struct task_struct *atomic_write_task; /* store atomic write task */
struct extent_tree *extent_tree; /* cached extent_tree entry */
+ struct inode *cow_inode; /* copy-on-write inode for atomic write */

/* avoid racing between foreground op and gc */
struct f2fs_rwsem i_gc_rwsem[2];
@@ -1092,7 +1087,6 @@ enum count_type {
F2FS_DIRTY_QDATA,
F2FS_DIRTY_NODES,
F2FS_DIRTY_META,
- F2FS_INMEM_PAGES,
F2FS_DIRTY_IMETA,
F2FS_WB_CP_DATA,
F2FS_WB_DATA,
@@ -1122,11 +1116,7 @@ enum page_type {
META,
NR_PAGE_TYPE,
META_FLUSH,
- INMEM, /* the below types are used by tracepoints only. */
- INMEM_DROP,
- INMEM_INVALIDATE,
- INMEM_REVOKE,
- IPU,
+ IPU, /* the below types are used by tracepoints only. */
OPU,
};

@@ -1718,7 +1708,6 @@ struct f2fs_sb_info {

/* for skip statistic */
unsigned int atomic_files; /* # of opened atomic file */
- unsigned long long skipped_atomic_files[2]; /* FG_GC and BG_GC */
unsigned long long skipped_gc_rwsem; /* FG_GC only */

/* threshold for gc trials on pinned files */
@@ -3202,11 +3191,6 @@ static inline bool f2fs_is_atomic_file(struct inode *inode)
return is_inode_flag_set(inode, FI_ATOMIC_FILE);
}

-static inline bool f2fs_is_commit_atomic_write(struct inode *inode)
-{
- return is_inode_flag_set(inode, FI_ATOMIC_COMMIT);
-}
-
static inline bool f2fs_is_volatile_file(struct inode *inode)
{
return is_inode_flag_set(inode, FI_VOLATILE_FILE);
@@ -3444,6 +3428,8 @@ void f2fs_handle_failed_inode(struct inode *inode);
int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
bool hot, bool set);
struct dentry *f2fs_get_parent(struct dentry *child);
+int f2fs_get_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
+ struct inode **new_inode);

/*
* dir.c
@@ -3579,11 +3565,8 @@ void f2fs_destroy_node_manager_caches(void);
* segment.c
*/
bool f2fs_need_SSR(struct f2fs_sb_info *sbi);
-void f2fs_register_inmem_page(struct inode *inode, struct page *page);
-void f2fs_drop_inmem_pages_all(struct f2fs_sb_info *sbi, bool gc_failure);
-void f2fs_drop_inmem_pages(struct inode *inode);
-void f2fs_drop_inmem_page(struct inode *inode, struct page *page);
-int f2fs_commit_inmem_pages(struct inode *inode);
+int f2fs_commit_atomic_write(struct inode *inode);
+void f2fs_abort_atomic_write(struct inode *inode, bool clean);
void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need);
void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi, bool from_bg);
int f2fs_issue_flush(struct f2fs_sb_info *sbi, nid_t ino);
@@ -3815,7 +3798,6 @@ struct f2fs_stat_info {
int ext_tree, zombie_tree, ext_node;
int ndirty_node, ndirty_dent, ndirty_meta, ndirty_imeta;
int ndirty_data, ndirty_qdata;
- int inmem_pages;
unsigned int ndirty_dirs, ndirty_files, nquota_files, ndirty_all;
int nats, dirty_nats, sits, dirty_sits;
int free_nids, avail_nids, alloc_nids;
@@ -3845,7 +3827,6 @@ struct f2fs_stat_info {
int bg_node_segs, bg_data_segs;
int tot_blks, data_blks, node_blks;
int bg_data_blks, bg_node_blks;
- unsigned long long skipped_atomic_files[2];
int curseg[NR_CURSEG_TYPE];
int cursec[NR_CURSEG_TYPE];
int curzone[NR_CURSEG_TYPE];
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 5d1b97e852e7..9b04a7a0a368 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1816,9 +1816,8 @@ static int f2fs_release_file(struct inode *inode, struct file *filp)
atomic_read(&inode->i_writecount) != 1)
return 0;

- /* some remained atomic pages should discarded */
if (f2fs_is_atomic_file(inode))
- f2fs_drop_inmem_pages(inode);
+ f2fs_abort_atomic_write(inode, true);
if (f2fs_is_volatile_file(inode)) {
set_inode_flag(inode, FI_DROP_CACHE);
filemap_fdatawrite(inode->i_mapping);
@@ -1840,8 +1839,8 @@ static int f2fs_file_flush(struct file *file, fl_owner_t id)
* before dropping file lock, it needs to do in ->flush.
*/
if (f2fs_is_atomic_file(inode) &&
- F2FS_I(inode)->inmem_task == current)
- f2fs_drop_inmem_pages(inode);
+ F2FS_I(inode)->atomic_write_task == current)
+ f2fs_abort_atomic_write(inode, true);
return 0;
}

@@ -2004,6 +2003,7 @@ static int f2fs_ioc_start_atomic_write(struct file *filp)
struct user_namespace *mnt_userns = file_mnt_user_ns(filp);
struct f2fs_inode_info *fi = F2FS_I(inode);
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct inode *pinode;
int ret;

if (!inode_owner_or_capable(mnt_userns, inode))
@@ -2026,11 +2026,8 @@ static int f2fs_ioc_start_atomic_write(struct file *filp)
goto out;
}

- if (f2fs_is_atomic_file(inode)) {
- if (is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST))
- ret = -EINVAL;
+ if (f2fs_is_atomic_file(inode))
goto out;
- }

ret = f2fs_convert_inline_inode(inode);
if (ret)
@@ -2051,19 +2048,33 @@ static int f2fs_ioc_start_atomic_write(struct file *filp)
goto out;
}

+ /* Create a COW inode for atomic write */
+ pinode = f2fs_iget(inode->i_sb, fi->i_pino);
+ if (IS_ERR(pinode)) {
+ f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+ ret = PTR_ERR(pinode);
+ goto out;
+ }
+
+ ret = f2fs_get_tmpfile(mnt_userns, pinode, &fi->cow_inode);
+ iput(pinode);
+ if (ret) {
+ f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+ goto out;
+ }
+ f2fs_i_size_write(fi->cow_inode, i_size_read(inode));
+
spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
- if (list_empty(&fi->inmem_ilist))
- list_add_tail(&fi->inmem_ilist, &sbi->inode_list[ATOMIC_FILE]);
sbi->atomic_files++;
spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);

- /* add inode in inmem_list first and set atomic_file */
set_inode_flag(inode, FI_ATOMIC_FILE);
- clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
+ set_inode_flag(fi->cow_inode, FI_ATOMIC_FILE);
+ clear_inode_flag(fi->cow_inode, FI_INLINE_DATA);
f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);

f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
- F2FS_I(inode)->inmem_task = current;
+ F2FS_I(inode)->atomic_write_task = current;
stat_update_max_atomic_write(inode);
out:
inode_unlock(inode);
@@ -2094,21 +2105,17 @@ static int f2fs_ioc_commit_atomic_write(struct file *filp)
}

if (f2fs_is_atomic_file(inode)) {
- ret = f2fs_commit_inmem_pages(inode);
+ ret = f2fs_commit_atomic_write(inode);
if (ret)
goto err_out;

ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
if (!ret)
- f2fs_drop_inmem_pages(inode);
+ f2fs_abort_atomic_write(inode, false);
} else {
ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 1, false);
}
err_out:
- if (is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
- clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
- ret = -EINVAL;
- }
inode_unlock(inode);
mnt_drop_write_file(filp);
return ret;
@@ -2196,15 +2203,13 @@ static int f2fs_ioc_abort_volatile_write(struct file *filp)
inode_lock(inode);

if (f2fs_is_atomic_file(inode))
- f2fs_drop_inmem_pages(inode);
+ f2fs_abort_atomic_write(inode, true);
if (f2fs_is_volatile_file(inode)) {
clear_inode_flag(inode, FI_VOLATILE_FILE);
stat_dec_volatile_write(inode);
ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
}

- clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
-
inode_unlock(inode);

mnt_drop_write_file(filp);
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 3009c0a97ab4..ba8e93e517be 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -1245,13 +1245,6 @@ static int move_data_block(struct inode *inode, block_t bidx,
goto out;
}

- if (f2fs_is_atomic_file(inode)) {
- F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC]++;
- F2FS_I_SB(inode)->skipped_atomic_files[gc_type]++;
- err = -EAGAIN;
- goto out;
- }
-
err = f2fs_gc_pinned_control(inode, gc_type, segno);
if (err)
goto out;
@@ -1393,12 +1386,6 @@ static int move_data_page(struct inode *inode, block_t bidx, int gc_type,
goto out;
}

- if (f2fs_is_atomic_file(inode)) {
- F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC]++;
- F2FS_I_SB(inode)->skipped_atomic_files[gc_type]++;
- err = -EAGAIN;
- goto out;
- }
err = f2fs_gc_pinned_control(inode, gc_type, segno);
if (err)
goto out;
@@ -1765,8 +1752,6 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
.ilist = LIST_HEAD_INIT(gc_list.ilist),
.iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS),
};
- unsigned long long last_skipped = sbi->skipped_atomic_files[FG_GC];
- unsigned long long first_skipped;
unsigned int skipped_round = 0, round = 0;

trace_f2fs_gc_begin(sbi->sb, sync, background,
@@ -1780,7 +1765,6 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,

cpc.reason = __get_cp_reason(sbi);
sbi->skipped_gc_rwsem = 0;
- first_skipped = last_skipped;
gc_more:
if (unlikely(!(sbi->sb->s_flags & SB_ACTIVE))) {
ret = -EINVAL;
@@ -1831,10 +1815,8 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
total_freed += seg_freed;

if (gc_type == FG_GC) {
- if (sbi->skipped_atomic_files[FG_GC] > last_skipped ||
- sbi->skipped_gc_rwsem)
+ if (sbi->skipped_gc_rwsem)
skipped_round++;
- last_skipped = sbi->skipped_atomic_files[FG_GC];
round++;
}

@@ -1860,13 +1842,6 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
segno = NULL_SEGNO;
goto gc_more;
}
- if (first_skipped < last_skipped &&
- (last_skipped - first_skipped) >
- sbi->skipped_gc_rwsem) {
- f2fs_drop_inmem_pages_all(sbi, true);
- segno = NULL_SEGNO;
- goto gc_more;
- }
if (gc_type == FG_GC && !is_sbi_flag_set(sbi, SBI_CP_DISABLED))
ret = f2fs_write_checkpoint(sbi, &cpc);
stop:
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index e9818723103c..938961a9084e 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -744,9 +744,8 @@ void f2fs_evict_inode(struct inode *inode)
nid_t xnid = F2FS_I(inode)->i_xattr_nid;
int err = 0;

- /* some remained atomic pages should discarded */
if (f2fs_is_atomic_file(inode))
- f2fs_drop_inmem_pages(inode);
+ f2fs_abort_atomic_write(inode, true);

trace_f2fs_evict_inode(inode);
truncate_inode_pages_final(&inode->i_data);
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 3764e12f19db..28d5981443a7 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -848,8 +848,8 @@ static int f2fs_mknod(struct user_namespace *mnt_userns, struct inode *dir,
}

static int __f2fs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
- struct dentry *dentry, umode_t mode,
- struct inode **whiteout)
+ struct dentry *dentry, umode_t mode, bool is_whiteout,
+ struct inode **new_inode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
struct inode *inode;
@@ -863,7 +863,7 @@ static int __f2fs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
if (IS_ERR(inode))
return PTR_ERR(inode);

- if (whiteout) {
+ if (is_whiteout) {
init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
inode->i_op = &f2fs_special_inode_operations;
} else {
@@ -888,21 +888,25 @@ static int __f2fs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
f2fs_add_orphan_inode(inode);
f2fs_alloc_nid_done(sbi, inode->i_ino);

- if (whiteout) {
+ if (is_whiteout) {
f2fs_i_links_write(inode, false);

spin_lock(&inode->i_lock);
inode->i_state |= I_LINKABLE;
spin_unlock(&inode->i_lock);
-
- *whiteout = inode;
} else {
- d_tmpfile(dentry, inode);
+ if (dentry)
+ d_tmpfile(dentry, inode);
+ else
+ f2fs_i_links_write(inode, false);
}
/* link_count was changed by d_tmpfile as well. */
f2fs_unlock_op(sbi);
unlock_new_inode(inode);

+ if (new_inode)
+ *new_inode = inode;
+
f2fs_balance_fs(sbi, true);
return 0;

@@ -923,7 +927,7 @@ static int f2fs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
if (!f2fs_is_checkpoint_ready(sbi))
return -ENOSPC;

- return __f2fs_tmpfile(mnt_userns, dir, dentry, mode, NULL);
+ return __f2fs_tmpfile(mnt_userns, dir, dentry, mode, false, NULL);
}

static int f2fs_create_whiteout(struct user_namespace *mnt_userns,
@@ -933,7 +937,13 @@ static int f2fs_create_whiteout(struct user_namespace *mnt_userns,
return -EIO;

return __f2fs_tmpfile(mnt_userns, dir, NULL,
- S_IFCHR | WHITEOUT_MODE, whiteout);
+ S_IFCHR | WHITEOUT_MODE, true, whiteout);
+}
+
+int f2fs_get_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
+ struct inode **new_inode)
+{
+ return __f2fs_tmpfile(mnt_userns, dir, NULL, S_IFREG, false, new_inode);
}

static int f2fs_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index aedc3d334113..9dabf99eedc5 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -90,10 +90,6 @@ bool f2fs_available_free_memory(struct f2fs_sb_info *sbi, int type)
atomic_read(&sbi->total_ext_node) *
sizeof(struct extent_node)) >> PAGE_SHIFT;
res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1);
- } else if (type == INMEM_PAGES) {
- /* it allows 20% / total_ram for inmemory pages */
- mem_size = get_pages(sbi, F2FS_INMEM_PAGES);
- res = mem_size < (val.totalram / 5);
} else if (type == DISCARD_CACHE) {
mem_size = (atomic_read(&dcc->discard_cmd_cnt) *
sizeof(struct discard_cmd)) >> PAGE_SHIFT;
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 4c1d34bfea78..3c09cae058b0 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -147,7 +147,6 @@ enum mem_type {
DIRTY_DENTS, /* indicates dirty dentry pages */
INO_ENTRIES, /* indicates inode entries */
EXTENT_CACHE, /* indicates extent cache */
- INMEM_PAGES, /* indicates inmemory pages */
DISCARD_CACHE, /* indicates memory of cached discard cmds */
COMPRESS_PAGE, /* indicates memory of cached compressed pages */
BASE_CHECK, /* check kernel status */
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index a914b70f8543..86a3c5a5a564 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -30,7 +30,7 @@
static struct kmem_cache *discard_entry_slab;
static struct kmem_cache *discard_cmd_slab;
static struct kmem_cache *sit_entry_set_slab;
-static struct kmem_cache *inmem_entry_slab;
+static struct kmem_cache *revoke_entry_slab;

static unsigned long __reverse_ulong(unsigned char *str)
{
@@ -185,304 +185,180 @@ bool f2fs_need_SSR(struct f2fs_sb_info *sbi)
SM_I(sbi)->min_ssr_sections + reserved_sections(sbi));
}

-void f2fs_register_inmem_page(struct inode *inode, struct page *page)
+void f2fs_abort_atomic_write(struct inode *inode, bool clean)
{
- struct inmem_pages *new;
-
- set_page_private_atomic(page);
-
- new = f2fs_kmem_cache_alloc(inmem_entry_slab,
- GFP_NOFS, true, NULL);
-
- /* add atomic page indices to the list */
- new->page = page;
- INIT_LIST_HEAD(&new->list);
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct f2fs_inode_info *fi = F2FS_I(inode);

- /* increase reference count with clean state */
- get_page(page);
- mutex_lock(&F2FS_I(inode)->inmem_lock);
- list_add_tail(&new->list, &F2FS_I(inode)->inmem_pages);
- inc_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
- mutex_unlock(&F2FS_I(inode)->inmem_lock);
+ if (f2fs_is_atomic_file(inode)) {
+ if (clean)
+ truncate_inode_pages_final(inode->i_mapping);
+ clear_inode_flag(fi->cow_inode, FI_ATOMIC_FILE);
+ iput(fi->cow_inode);
+ fi->cow_inode = NULL;
+ clear_inode_flag(inode, FI_ATOMIC_FILE);

- trace_f2fs_register_inmem_page(page, INMEM);
+ spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
+ sbi->atomic_files--;
+ spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
+ }
}

-static int __revoke_inmem_pages(struct inode *inode,
- struct list_head *head, bool drop, bool recover,
- bool trylock)
+static int __replace_atomic_write_block(struct inode *inode, pgoff_t index,
+ block_t new_addr, block_t *old_addr, bool recover)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
- struct inmem_pages *cur, *tmp;
- int err = 0;
-
- list_for_each_entry_safe(cur, tmp, head, list) {
- struct page *page = cur->page;
-
- if (drop)
- trace_f2fs_commit_inmem_page(page, INMEM_DROP);
-
- if (trylock) {
- /*
- * to avoid deadlock in between page lock and
- * inmem_lock.
- */
- if (!trylock_page(page))
- continue;
- } else {
- lock_page(page);
- }
-
- f2fs_wait_on_page_writeback(page, DATA, true, true);
-
- if (recover) {
- struct dnode_of_data dn;
- struct node_info ni;
+ struct dnode_of_data dn;
+ struct node_info ni;
+ int err;

- trace_f2fs_commit_inmem_page(page, INMEM_REVOKE);
retry:
- set_new_dnode(&dn, inode, NULL, NULL, 0);
- err = f2fs_get_dnode_of_data(&dn, page->index,
- LOOKUP_NODE);
- if (err) {
- if (err == -ENOMEM) {
- memalloc_retry_wait(GFP_NOFS);
- goto retry;
- }
- err = -EAGAIN;
- goto next;
- }
-
- err = f2fs_get_node_info(sbi, dn.nid, &ni, false);
- if (err) {
- f2fs_put_dnode(&dn);
- return err;
- }
-
- if (cur->old_addr == NEW_ADDR) {
- f2fs_invalidate_blocks(sbi, dn.data_blkaddr);
- f2fs_update_data_blkaddr(&dn, NEW_ADDR);
- } else
- f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
- cur->old_addr, ni.version, true, true);
- f2fs_put_dnode(&dn);
- }
-next:
- /* we don't need to invalidate this in the sccessful status */
- if (drop || recover) {
- ClearPageUptodate(page);
- clear_page_private_gcing(page);
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE_RA);
+ if (err) {
+ if (err == -ENOMEM) {
+ f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
+ goto retry;
}
- detach_page_private(page);
- set_page_private(page, 0);
- f2fs_put_page(page, 1);
-
- list_del(&cur->list);
- kmem_cache_free(inmem_entry_slab, cur);
- dec_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
+ return err;
}
- return err;
-}

-void f2fs_drop_inmem_pages_all(struct f2fs_sb_info *sbi, bool gc_failure)
-{
- struct list_head *head = &sbi->inode_list[ATOMIC_FILE];
- struct inode *inode;
- struct f2fs_inode_info *fi;
- unsigned int count = sbi->atomic_files;
- unsigned int looped = 0;
-next:
- spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
- if (list_empty(head)) {
- spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
- return;
+ err = f2fs_get_node_info(sbi, dn.nid, &ni, false);
+ if (err) {
+ f2fs_put_dnode(&dn);
+ return err;
}
- fi = list_first_entry(head, struct f2fs_inode_info, inmem_ilist);
- inode = igrab(&fi->vfs_inode);
- if (inode)
- list_move_tail(&fi->inmem_ilist, head);
- spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);

- if (inode) {
- if (gc_failure) {
- if (!fi->i_gc_failures[GC_FAILURE_ATOMIC])
- goto skip;
+ if (recover) {
+ /* dn.data_blkaddr is always valid */
+ if (!__is_valid_data_blkaddr(new_addr)) {
+ if (new_addr == NULL_ADDR)
+ dec_valid_block_count(sbi, inode, 1);
+ f2fs_invalidate_blocks(sbi, dn.data_blkaddr);
+ f2fs_update_data_blkaddr(&dn, new_addr);
+ } else {
+ f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
+ new_addr, ni.version, true, true);
}
- set_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
- f2fs_drop_inmem_pages(inode);
-skip:
- iput(inode);
- }
- f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
- if (gc_failure) {
- if (++looped >= count)
- return;
- }
- goto next;
-}
-
-void f2fs_drop_inmem_pages(struct inode *inode)
-{
- struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
- struct f2fs_inode_info *fi = F2FS_I(inode);
+ } else {
+ blkcnt_t count = 1;

- do {
- mutex_lock(&fi->inmem_lock);
- if (list_empty(&fi->inmem_pages)) {
- fi->i_gc_failures[GC_FAILURE_ATOMIC] = 0;
-
- spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
- if (!list_empty(&fi->inmem_ilist))
- list_del_init(&fi->inmem_ilist);
- if (f2fs_is_atomic_file(inode)) {
- clear_inode_flag(inode, FI_ATOMIC_FILE);
- sbi->atomic_files--;
- }
- spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
+ *old_addr = dn.data_blkaddr;
+ f2fs_truncate_data_blocks_range(&dn, 1);
+ dec_valid_block_count(sbi, F2FS_I(inode)->cow_inode, count);
+ inc_valid_block_count(sbi, inode, &count);
+ f2fs_replace_block(sbi, &dn, dn.data_blkaddr, new_addr,
+ ni.version, true, false);
+ }

- mutex_unlock(&fi->inmem_lock);
- break;
- }
- __revoke_inmem_pages(inode, &fi->inmem_pages,
- true, false, true);
- mutex_unlock(&fi->inmem_lock);
- } while (1);
+ f2fs_put_dnode(&dn);
+ return 0;
}

-void f2fs_drop_inmem_page(struct inode *inode, struct page *page)
+static void __complete_revoke_list(struct inode *inode, struct list_head *head,
+ bool revoke)
{
- struct f2fs_inode_info *fi = F2FS_I(inode);
- struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
- struct list_head *head = &fi->inmem_pages;
- struct inmem_pages *cur = NULL;
- struct inmem_pages *tmp;
-
- f2fs_bug_on(sbi, !page_private_atomic(page));
+ struct revoke_entry *cur, *tmp;

- mutex_lock(&fi->inmem_lock);
- list_for_each_entry(tmp, head, list) {
- if (tmp->page == page) {
- cur = tmp;
- break;
- }
+ list_for_each_entry_safe(cur, tmp, head, list) {
+ if (revoke)
+ __replace_atomic_write_block(inode, cur->index,
+ cur->old_addr, NULL, true);
+ list_del(&cur->list);
+ kmem_cache_free(revoke_entry_slab, cur);
}
-
- f2fs_bug_on(sbi, !cur);
- list_del(&cur->list);
- mutex_unlock(&fi->inmem_lock);
-
- dec_page_count(sbi, F2FS_INMEM_PAGES);
- kmem_cache_free(inmem_entry_slab, cur);
-
- ClearPageUptodate(page);
- clear_page_private_atomic(page);
- f2fs_put_page(page, 0);
-
- detach_page_private(page);
- set_page_private(page, 0);
-
- trace_f2fs_commit_inmem_page(page, INMEM_INVALIDATE);
}

-static int __f2fs_commit_inmem_pages(struct inode *inode)
+static int __f2fs_commit_atomic_write(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct f2fs_inode_info *fi = F2FS_I(inode);
- struct inmem_pages *cur, *tmp;
- struct f2fs_io_info fio = {
- .sbi = sbi,
- .ino = inode->i_ino,
- .type = DATA,
- .op = REQ_OP_WRITE,
- .op_flags = REQ_SYNC | REQ_PRIO,
- .io_type = FS_DATA_IO,
- };
+ struct inode *cow_inode = fi->cow_inode;
+ struct revoke_entry *new;
struct list_head revoke_list;
- bool submit_bio = false;
- int err = 0;
+ block_t blkaddr;
+ struct dnode_of_data dn;
+ pgoff_t len = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
+ pgoff_t off = 0, blen, index;
+ int ret = 0, i;

INIT_LIST_HEAD(&revoke_list);

- list_for_each_entry_safe(cur, tmp, &fi->inmem_pages, list) {
- struct page *page = cur->page;
+ while (len) {
+ blen = min_t(pgoff_t, ADDRS_PER_BLOCK(cow_inode), len);

- lock_page(page);
- if (page->mapping == inode->i_mapping) {
- trace_f2fs_commit_inmem_page(page, INMEM);
+ set_new_dnode(&dn, cow_inode, NULL, NULL, 0);
+ ret = f2fs_get_dnode_of_data(&dn, off, LOOKUP_NODE_RA);
+ if (ret && ret != -ENOENT) {
+ goto out;
+ } else if (ret == -ENOENT) {
+ ret = 0;
+ if (dn.max_level == 0)
+ goto out;
+ goto next;
+ }

- f2fs_wait_on_page_writeback(page, DATA, true, true);
+ blen = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, cow_inode),
+ len);
+ index = off;
+ for (i = 0; i < blen; i++, dn.ofs_in_node++, index++) {
+ blkaddr = f2fs_data_blkaddr(&dn);

- set_page_dirty(page);
- if (clear_page_dirty_for_io(page)) {
- inode_dec_dirty_pages(inode);
- f2fs_remove_dirty_inode(inode);
- }
-retry:
- fio.page = page;
- fio.old_blkaddr = NULL_ADDR;
- fio.encrypted_page = NULL;
- fio.need_lock = LOCK_DONE;
- err = f2fs_do_write_data_page(&fio);
- if (err) {
- if (err == -ENOMEM) {
- memalloc_retry_wait(GFP_NOFS);
- goto retry;
- }
- unlock_page(page);
- break;
+ if (!__is_valid_data_blkaddr(blkaddr)) {
+ continue;
+ } else if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
+ DATA_GENERIC_ENHANCE)) {
+ f2fs_put_dnode(&dn);
+ ret = -EFSCORRUPTED;
+ goto out;
}
- /* record old blkaddr for revoking */
- cur->old_addr = fio.old_blkaddr;
- submit_bio = true;
- }
- unlock_page(page);
- list_move_tail(&cur->list, &revoke_list);
- }

- if (submit_bio)
- f2fs_submit_merged_write_cond(sbi, inode, NULL, 0, DATA);
+ new = f2fs_kmem_cache_alloc(revoke_entry_slab, GFP_NOFS,
+ true, NULL);
+ if (!new) {
+ f2fs_put_dnode(&dn);
+ ret = -ENOMEM;
+ goto out;
+ }

- if (err) {
- /*
- * try to revoke all committed pages, but still we could fail
- * due to no memory or other reason, if that happened, EAGAIN
- * will be returned, which means in such case, transaction is
- * already not integrity, caller should use journal to do the
- * recovery or rewrite & commit last transaction. For other
- * error number, revoking was done by filesystem itself.
- */
- err = __revoke_inmem_pages(inode, &revoke_list,
- false, true, false);
+ ret = __replace_atomic_write_block(inode, index, blkaddr,
+ &new->old_addr, false);
+ if (ret) {
+ f2fs_put_dnode(&dn);
+ kmem_cache_free(revoke_entry_slab, new);
+ goto out;
+ }

- /* drop all uncommitted pages */
- __revoke_inmem_pages(inode, &fi->inmem_pages,
- true, false, false);
- } else {
- __revoke_inmem_pages(inode, &revoke_list,
- false, false, false);
+ f2fs_update_data_blkaddr(&dn, NULL_ADDR);
+ new->index = index;
+ list_add_tail(&new->list, &revoke_list);
+ }
+ f2fs_put_dnode(&dn);
+next:
+ off += blen;
+ len -= blen;
}

- return err;
+out:
+ __complete_revoke_list(inode, &revoke_list, ret ? true : false);
+
+ return ret;
}

-int f2fs_commit_inmem_pages(struct inode *inode)
+int f2fs_commit_atomic_write(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct f2fs_inode_info *fi = F2FS_I(inode);
int err;

- f2fs_balance_fs(sbi, true);
+ err = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
+ if (err)
+ return err;

f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
-
f2fs_lock_op(sbi);
- set_inode_flag(inode, FI_ATOMIC_COMMIT);
-
- mutex_lock(&fi->inmem_lock);
- err = __f2fs_commit_inmem_pages(inode);
- mutex_unlock(&fi->inmem_lock);

- clear_inode_flag(inode, FI_ATOMIC_COMMIT);
+ err = __f2fs_commit_atomic_write(inode);

f2fs_unlock_op(sbi);
f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
@@ -5359,9 +5235,9 @@ int __init f2fs_create_segment_manager_caches(void)
if (!sit_entry_set_slab)
goto destroy_discard_cmd;

- inmem_entry_slab = f2fs_kmem_cache_create("f2fs_inmem_page_entry",
- sizeof(struct inmem_pages));
- if (!inmem_entry_slab)
+ revoke_entry_slab = f2fs_kmem_cache_create("f2fs_revoke_entry",
+ sizeof(struct revoke_entry));
+ if (!revoke_entry_slab)
goto destroy_sit_entry_set;
return 0;

@@ -5380,5 +5256,5 @@ void f2fs_destroy_segment_manager_caches(void)
kmem_cache_destroy(sit_entry_set_slab);
kmem_cache_destroy(discard_cmd_slab);
kmem_cache_destroy(discard_entry_slab);
- kmem_cache_destroy(inmem_entry_slab);
+ kmem_cache_destroy(revoke_entry_slab);
}
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 8fbc9f6afa55..3f277dfcb131 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -225,10 +225,10 @@ struct segment_allocation {

#define MAX_SKIP_GC_COUNT 16

-struct inmem_pages {
+struct revoke_entry {
struct list_head list;
- struct page *page;
block_t old_addr; /* for revoking when fail to commit */
+ pgoff_t index;
};

struct sit_info {
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 1b59f95606c7..e3539c027a6c 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1339,9 +1339,6 @@ static struct inode *f2fs_alloc_inode(struct super_block *sb)
spin_lock_init(&fi->i_size_lock);
INIT_LIST_HEAD(&fi->dirty_list);
INIT_LIST_HEAD(&fi->gdirty_list);
- INIT_LIST_HEAD(&fi->inmem_ilist);
- INIT_LIST_HEAD(&fi->inmem_pages);
- mutex_init(&fi->inmem_lock);
init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
init_f2fs_rwsem(&fi->i_xattr_sem);
@@ -1382,9 +1379,8 @@ static int f2fs_drop_inode(struct inode *inode)
atomic_inc(&inode->i_count);
spin_unlock(&inode->i_lock);

- /* some remained atomic pages should discarded */
if (f2fs_is_atomic_file(inode))
- f2fs_drop_inmem_pages(inode);
+ f2fs_abort_atomic_write(inode, true);

/* should remain fi->extent_tree for writepage */
f2fs_destroy_extent_node(inode);
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 1779e133cea0..d91370377523 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -15,10 +15,6 @@ TRACE_DEFINE_ENUM(NODE);
TRACE_DEFINE_ENUM(DATA);
TRACE_DEFINE_ENUM(META);
TRACE_DEFINE_ENUM(META_FLUSH);
-TRACE_DEFINE_ENUM(INMEM);
-TRACE_DEFINE_ENUM(INMEM_DROP);
-TRACE_DEFINE_ENUM(INMEM_INVALIDATE);
-TRACE_DEFINE_ENUM(INMEM_REVOKE);
TRACE_DEFINE_ENUM(IPU);
TRACE_DEFINE_ENUM(OPU);
TRACE_DEFINE_ENUM(HOT);
@@ -59,10 +55,6 @@ TRACE_DEFINE_ENUM(CP_RESIZE);
{ DATA, "DATA" }, \
{ META, "META" }, \
{ META_FLUSH, "META_FLUSH" }, \
- { INMEM, "INMEM" }, \
- { INMEM_DROP, "INMEM_DROP" }, \
- { INMEM_INVALIDATE, "INMEM_INVALIDATE" }, \
- { INMEM_REVOKE, "INMEM_REVOKE" }, \
{ IPU, "IN-PLACE" }, \
{ OPU, "OUT-OF-PLACE" })

@@ -1289,20 +1281,6 @@ DEFINE_EVENT(f2fs__page, f2fs_vm_page_mkwrite,
TP_ARGS(page, type)
);

-DEFINE_EVENT(f2fs__page, f2fs_register_inmem_page,
-
- TP_PROTO(struct page *page, int type),
-
- TP_ARGS(page, type)
-);
-
-DEFINE_EVENT(f2fs__page, f2fs_commit_inmem_page,
-
- TP_PROTO(struct page *page, int type),
-
- TP_ARGS(page, type)
-);
-
TRACE_EVENT(f2fs_filemap_fault,

TP_PROTO(struct inode *inode, pgoff_t index, unsigned long ret),
--
2.35.1