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authorLinus Torvalds <torvalds@linux-foundation.org>2016-08-23 20:24:27 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2016-08-23 20:24:27 -0400
commitb059152245e778c5526e198a99f0475c8fc26506 (patch)
tree2d3d7b092859b35f189bd14cf7288707bbc8f359 /fs
parent7a1dcf6adaa7cc4b8cd93a3883267497a77b1051 (diff)
parent20a3d61d46e1fb45efa6eb4637c0dcd3f00a14e9 (diff)
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Merge tag 'for-f2fs-v4.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
Pull f2fs fixes from Jaegeuk Kim: - fsmark regression - i_size race condition - wrong conditions in f2fs_move_file_range * tag 'for-f2fs-v4.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: f2fs: avoid potential deadlock in f2fs_move_file_range f2fs: allow copying file range only in between regular files Revert "f2fs: move i_size_write in f2fs_write_end" Revert "f2fs: use percpu_rw_semaphore"
Diffstat (limited to 'fs')
-rw-r--r--fs/f2fs/data.c2
-rw-r--r--fs/f2fs/f2fs.h12
-rw-r--r--fs/f2fs/file.c13
-rw-r--r--fs/f2fs/node.c47
-rw-r--r--fs/f2fs/super.c6
5 files changed, 40 insertions, 40 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index d64d2a515cb2..ccb401eebc11 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1699,11 +1699,11 @@ static int f2fs_write_end(struct file *file,
trace_f2fs_write_end(inode, pos, len, copied);
set_page_dirty(page);
- f2fs_put_page(page, 1);
if (pos + copied > i_size_read(inode))
f2fs_i_size_write(inode, pos + copied);
+ f2fs_put_page(page, 1);
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
return copied;
}
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 675fa79d86f6..14f5fe2b841e 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -538,7 +538,7 @@ struct f2fs_nm_info {
/* NAT cache management */
struct radix_tree_root nat_root;/* root of the nat entry cache */
struct radix_tree_root nat_set_root;/* root of the nat set cache */
- struct percpu_rw_semaphore nat_tree_lock; /* protect nat_tree_lock */
+ struct rw_semaphore nat_tree_lock; /* protect nat_tree_lock */
struct list_head nat_entries; /* cached nat entry list (clean) */
unsigned int nat_cnt; /* the # of cached nat entries */
unsigned int dirty_nat_cnt; /* total num of nat entries in set */
@@ -787,7 +787,7 @@ struct f2fs_sb_info {
struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
struct inode *meta_inode; /* cache meta blocks */
struct mutex cp_mutex; /* checkpoint procedure lock */
- struct percpu_rw_semaphore cp_rwsem; /* blocking FS operations */
+ struct rw_semaphore cp_rwsem; /* blocking FS operations */
struct rw_semaphore node_write; /* locking node writes */
wait_queue_head_t cp_wait;
unsigned long last_time[MAX_TIME]; /* to store time in jiffies */
@@ -1074,22 +1074,22 @@ static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
{
- percpu_down_read(&sbi->cp_rwsem);
+ down_read(&sbi->cp_rwsem);
}
static inline void f2fs_unlock_op(struct f2fs_sb_info *sbi)
{
- percpu_up_read(&sbi->cp_rwsem);
+ up_read(&sbi->cp_rwsem);
}
static inline void f2fs_lock_all(struct f2fs_sb_info *sbi)
{
- percpu_down_write(&sbi->cp_rwsem);
+ down_write(&sbi->cp_rwsem);
}
static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
{
- percpu_up_write(&sbi->cp_rwsem);
+ up_write(&sbi->cp_rwsem);
}
static inline int __get_cp_reason(struct f2fs_sb_info *sbi)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 0e493f63ea41..47abb96098e4 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -2086,15 +2086,19 @@ static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
if (unlikely(f2fs_readonly(src->i_sb)))
return -EROFS;
- if (S_ISDIR(src->i_mode) || S_ISDIR(dst->i_mode))
- return -EISDIR;
+ if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode))
+ return -EINVAL;
if (f2fs_encrypted_inode(src) || f2fs_encrypted_inode(dst))
return -EOPNOTSUPP;
inode_lock(src);
- if (src != dst)
- inode_lock(dst);
+ if (src != dst) {
+ if (!inode_trylock(dst)) {
+ ret = -EBUSY;
+ goto out;
+ }
+ }
ret = -EINVAL;
if (pos_in + len > src->i_size || pos_in + len < pos_in)
@@ -2152,6 +2156,7 @@ static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
out_unlock:
if (src != dst)
inode_unlock(dst);
+out:
inode_unlock(src);
return ret;
}
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index b2fa4b615925..f75d197d5beb 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -206,14 +206,14 @@ int need_dentry_mark(struct f2fs_sb_info *sbi, nid_t nid)
struct nat_entry *e;
bool need = false;
- percpu_down_read(&nm_i->nat_tree_lock);
+ down_read(&nm_i->nat_tree_lock);
e = __lookup_nat_cache(nm_i, nid);
if (e) {
if (!get_nat_flag(e, IS_CHECKPOINTED) &&
!get_nat_flag(e, HAS_FSYNCED_INODE))
need = true;
}
- percpu_up_read(&nm_i->nat_tree_lock);
+ up_read(&nm_i->nat_tree_lock);
return need;
}
@@ -223,11 +223,11 @@ bool is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid)
struct nat_entry *e;
bool is_cp = true;
- percpu_down_read(&nm_i->nat_tree_lock);
+ down_read(&nm_i->nat_tree_lock);
e = __lookup_nat_cache(nm_i, nid);
if (e && !get_nat_flag(e, IS_CHECKPOINTED))
is_cp = false;
- percpu_up_read(&nm_i->nat_tree_lock);
+ up_read(&nm_i->nat_tree_lock);
return is_cp;
}
@@ -237,13 +237,13 @@ bool need_inode_block_update(struct f2fs_sb_info *sbi, nid_t ino)
struct nat_entry *e;
bool need_update = true;
- percpu_down_read(&nm_i->nat_tree_lock);
+ down_read(&nm_i->nat_tree_lock);
e = __lookup_nat_cache(nm_i, ino);
if (e && get_nat_flag(e, HAS_LAST_FSYNC) &&
(get_nat_flag(e, IS_CHECKPOINTED) ||
get_nat_flag(e, HAS_FSYNCED_INODE)))
need_update = false;
- percpu_up_read(&nm_i->nat_tree_lock);
+ up_read(&nm_i->nat_tree_lock);
return need_update;
}
@@ -284,7 +284,7 @@ static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
struct f2fs_nm_info *nm_i = NM_I(sbi);
struct nat_entry *e;
- percpu_down_write(&nm_i->nat_tree_lock);
+ down_write(&nm_i->nat_tree_lock);
e = __lookup_nat_cache(nm_i, ni->nid);
if (!e) {
e = grab_nat_entry(nm_i, ni->nid);
@@ -334,7 +334,7 @@ static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
set_nat_flag(e, HAS_FSYNCED_INODE, true);
set_nat_flag(e, HAS_LAST_FSYNC, fsync_done);
}
- percpu_up_write(&nm_i->nat_tree_lock);
+ up_write(&nm_i->nat_tree_lock);
}
int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink)
@@ -342,7 +342,8 @@ int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink)
struct f2fs_nm_info *nm_i = NM_I(sbi);
int nr = nr_shrink;
- percpu_down_write(&nm_i->nat_tree_lock);
+ if (!down_write_trylock(&nm_i->nat_tree_lock))
+ return 0;
while (nr_shrink && !list_empty(&nm_i->nat_entries)) {
struct nat_entry *ne;
@@ -351,7 +352,7 @@ int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink)
__del_from_nat_cache(nm_i, ne);
nr_shrink--;
}
- percpu_up_write(&nm_i->nat_tree_lock);
+ up_write(&nm_i->nat_tree_lock);
return nr - nr_shrink;
}
@@ -373,13 +374,13 @@ void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni)
ni->nid = nid;
/* Check nat cache */
- percpu_down_read(&nm_i->nat_tree_lock);
+ down_read(&nm_i->nat_tree_lock);
e = __lookup_nat_cache(nm_i, nid);
if (e) {
ni->ino = nat_get_ino(e);
ni->blk_addr = nat_get_blkaddr(e);
ni->version = nat_get_version(e);
- percpu_up_read(&nm_i->nat_tree_lock);
+ up_read(&nm_i->nat_tree_lock);
return;
}
@@ -403,11 +404,11 @@ void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni)
node_info_from_raw_nat(ni, &ne);
f2fs_put_page(page, 1);
cache:
- percpu_up_read(&nm_i->nat_tree_lock);
+ up_read(&nm_i->nat_tree_lock);
/* cache nat entry */
- percpu_down_write(&nm_i->nat_tree_lock);
+ down_write(&nm_i->nat_tree_lock);
cache_nat_entry(sbi, nid, &ne);
- percpu_up_write(&nm_i->nat_tree_lock);
+ up_write(&nm_i->nat_tree_lock);
}
/*
@@ -1788,7 +1789,7 @@ void build_free_nids(struct f2fs_sb_info *sbi)
ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nid), FREE_NID_PAGES,
META_NAT, true);
- percpu_down_read(&nm_i->nat_tree_lock);
+ down_read(&nm_i->nat_tree_lock);
while (1) {
struct page *page = get_current_nat_page(sbi, nid);
@@ -1820,7 +1821,7 @@ void build_free_nids(struct f2fs_sb_info *sbi)
remove_free_nid(nm_i, nid);
}
up_read(&curseg->journal_rwsem);
- percpu_up_read(&nm_i->nat_tree_lock);
+ up_read(&nm_i->nat_tree_lock);
ra_meta_pages(sbi, NAT_BLOCK_OFFSET(nm_i->next_scan_nid),
nm_i->ra_nid_pages, META_NAT, false);
@@ -2209,7 +2210,7 @@ void flush_nat_entries(struct f2fs_sb_info *sbi)
if (!nm_i->dirty_nat_cnt)
return;
- percpu_down_write(&nm_i->nat_tree_lock);
+ down_write(&nm_i->nat_tree_lock);
/*
* if there are no enough space in journal to store dirty nat
@@ -2232,7 +2233,7 @@ void flush_nat_entries(struct f2fs_sb_info *sbi)
list_for_each_entry_safe(set, tmp, &sets, set_list)
__flush_nat_entry_set(sbi, set);
- percpu_up_write(&nm_i->nat_tree_lock);
+ up_write(&nm_i->nat_tree_lock);
f2fs_bug_on(sbi, nm_i->dirty_nat_cnt);
}
@@ -2268,8 +2269,7 @@ static int init_node_manager(struct f2fs_sb_info *sbi)
mutex_init(&nm_i->build_lock);
spin_lock_init(&nm_i->free_nid_list_lock);
- if (percpu_init_rwsem(&nm_i->nat_tree_lock))
- return -ENOMEM;
+ init_rwsem(&nm_i->nat_tree_lock);
nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid);
nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP);
@@ -2326,7 +2326,7 @@ void destroy_node_manager(struct f2fs_sb_info *sbi)
spin_unlock(&nm_i->free_nid_list_lock);
/* destroy nat cache */
- percpu_down_write(&nm_i->nat_tree_lock);
+ down_write(&nm_i->nat_tree_lock);
while ((found = __gang_lookup_nat_cache(nm_i,
nid, NATVEC_SIZE, natvec))) {
unsigned idx;
@@ -2351,9 +2351,8 @@ void destroy_node_manager(struct f2fs_sb_info *sbi)
kmem_cache_free(nat_entry_set_slab, setvec[idx]);
}
}
- percpu_up_write(&nm_i->nat_tree_lock);
+ up_write(&nm_i->nat_tree_lock);
- percpu_free_rwsem(&nm_i->nat_tree_lock);
kfree(nm_i->nat_bitmap);
sbi->nm_info = NULL;
kfree(nm_i);
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 1b86d3f638ef..7f863a645ab1 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -706,8 +706,6 @@ static void destroy_percpu_info(struct f2fs_sb_info *sbi)
percpu_counter_destroy(&sbi->nr_pages[i]);
percpu_counter_destroy(&sbi->alloc_valid_block_count);
percpu_counter_destroy(&sbi->total_valid_inode_count);
-
- percpu_free_rwsem(&sbi->cp_rwsem);
}
static void f2fs_put_super(struct super_block *sb)
@@ -1483,9 +1481,6 @@ static int init_percpu_info(struct f2fs_sb_info *sbi)
{
int i, err;
- if (percpu_init_rwsem(&sbi->cp_rwsem))
- return -ENOMEM;
-
for (i = 0; i < NR_COUNT_TYPE; i++) {
err = percpu_counter_init(&sbi->nr_pages[i], 0, GFP_KERNEL);
if (err)
@@ -1686,6 +1681,7 @@ try_onemore:
sbi->write_io[i].bio = NULL;
}
+ init_rwsem(&sbi->cp_rwsem);
init_waitqueue_head(&sbi->cp_wait);
init_sb_info(sbi);