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Diffstat (limited to 'fs/f2fs/dir.c')
-rw-r--r--fs/f2fs/dir.c112
1 files changed, 53 insertions, 59 deletions
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index a1f38443ecee..1ac6b93036b7 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -60,7 +60,7 @@ static unsigned char f2fs_type_by_mode[S_IFMT >> S_SHIFT] = {
static void set_de_type(struct f2fs_dir_entry *de, struct inode *inode)
{
- mode_t mode = inode->i_mode;
+ umode_t mode = inode->i_mode;
de->file_type = f2fs_type_by_mode[(mode & S_IFMT) >> S_SHIFT];
}
@@ -148,7 +148,7 @@ static struct f2fs_dir_entry *find_in_level(struct inode *dir,
for (; bidx < end_block; bidx++) {
/* no need to allocate new dentry pages to all the indices */
- dentry_page = find_data_page(dir, bidx);
+ dentry_page = find_data_page(dir, bidx, true);
if (IS_ERR(dentry_page)) {
room = true;
continue;
@@ -189,6 +189,9 @@ struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir,
unsigned int max_depth;
unsigned int level;
+ if (namelen > F2FS_NAME_LEN)
+ return NULL;
+
if (npages == 0)
return NULL;
@@ -246,9 +249,6 @@ ino_t f2fs_inode_by_name(struct inode *dir, struct qstr *qstr)
void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de,
struct page *page, struct inode *inode)
{
- struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
-
- mutex_lock_op(sbi, DENTRY_OPS);
lock_page(page);
wait_on_page_writeback(page);
de->ino = cpu_to_le32(inode->i_ino);
@@ -262,7 +262,6 @@ void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de,
F2FS_I(inode)->i_pino = dir->i_ino;
f2fs_put_page(page, 1);
- mutex_unlock_op(sbi, DENTRY_OPS);
}
void init_dent_inode(const struct qstr *name, struct page *ipage)
@@ -281,6 +280,43 @@ void init_dent_inode(const struct qstr *name, struct page *ipage)
set_page_dirty(ipage);
}
+static int make_empty_dir(struct inode *inode, struct inode *parent)
+{
+ struct page *dentry_page;
+ struct f2fs_dentry_block *dentry_blk;
+ struct f2fs_dir_entry *de;
+ void *kaddr;
+
+ dentry_page = get_new_data_page(inode, 0, true);
+ if (IS_ERR(dentry_page))
+ return PTR_ERR(dentry_page);
+
+ kaddr = kmap_atomic(dentry_page);
+ dentry_blk = (struct f2fs_dentry_block *)kaddr;
+
+ de = &dentry_blk->dentry[0];
+ de->name_len = cpu_to_le16(1);
+ de->hash_code = 0;
+ de->ino = cpu_to_le32(inode->i_ino);
+ memcpy(dentry_blk->filename[0], ".", 1);
+ set_de_type(de, inode);
+
+ de = &dentry_blk->dentry[1];
+ de->hash_code = 0;
+ de->name_len = cpu_to_le16(2);
+ de->ino = cpu_to_le32(parent->i_ino);
+ memcpy(dentry_blk->filename[1], "..", 2);
+ set_de_type(de, inode);
+
+ test_and_set_bit_le(0, &dentry_blk->dentry_bitmap);
+ test_and_set_bit_le(1, &dentry_blk->dentry_bitmap);
+ kunmap_atomic(kaddr);
+
+ set_page_dirty(dentry_page);
+ f2fs_put_page(dentry_page, 1);
+ return 0;
+}
+
static int init_inode_metadata(struct inode *inode,
struct inode *dir, const struct qstr *name)
{
@@ -291,7 +327,7 @@ static int init_inode_metadata(struct inode *inode,
return err;
if (S_ISDIR(inode->i_mode)) {
- err = f2fs_make_empty(inode, dir);
+ err = make_empty_dir(inode, dir);
if (err) {
remove_inode_page(inode);
return err;
@@ -314,7 +350,7 @@ static int init_inode_metadata(struct inode *inode,
}
if (is_inode_flag_set(F2FS_I(inode), FI_INC_LINK)) {
inc_nlink(inode);
- f2fs_write_inode(inode, NULL);
+ update_inode_page(inode);
}
return 0;
}
@@ -338,7 +374,7 @@ static void update_parent_metadata(struct inode *dir, struct inode *inode,
}
if (need_dir_update)
- f2fs_write_inode(dir, NULL);
+ update_inode_page(dir);
else
mark_inode_dirty(dir);
@@ -370,6 +406,10 @@ next:
goto next;
}
+/*
+ * Caller should grab and release a mutex by calling mutex_lock_op() and
+ * mutex_unlock_op().
+ */
int __f2fs_add_link(struct inode *dir, const struct qstr *name, struct inode *inode)
{
unsigned int bit_pos;
@@ -379,7 +419,6 @@ int __f2fs_add_link(struct inode *dir, const struct qstr *name, struct inode *in
f2fs_hash_t dentry_hash;
struct f2fs_dir_entry *de;
unsigned int nbucket, nblock;
- struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
size_t namelen = name->len;
struct page *dentry_page = NULL;
struct f2fs_dentry_block *dentry_blk = NULL;
@@ -409,12 +448,9 @@ start:
bidx = dir_block_index(level, (le32_to_cpu(dentry_hash) % nbucket));
for (block = bidx; block <= (bidx + nblock - 1); block++) {
- mutex_lock_op(sbi, DENTRY_OPS);
dentry_page = get_new_data_page(dir, block, true);
- if (IS_ERR(dentry_page)) {
- mutex_unlock_op(sbi, DENTRY_OPS);
+ if (IS_ERR(dentry_page))
return PTR_ERR(dentry_page);
- }
dentry_blk = kmap(dentry_page);
bit_pos = room_for_filename(dentry_blk, slots);
@@ -423,7 +459,6 @@ start:
kunmap(dentry_page);
f2fs_put_page(dentry_page, 1);
- mutex_unlock_op(sbi, DENTRY_OPS);
}
/* Move to next level to find the empty slot for new dentry */
@@ -453,7 +488,6 @@ add_dentry:
fail:
kunmap(dentry_page);
f2fs_put_page(dentry_page, 1);
- mutex_unlock_op(sbi, DENTRY_OPS);
return err;
}
@@ -473,8 +507,6 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
void *kaddr = page_address(page);
int i;
- mutex_lock_op(sbi, DENTRY_OPS);
-
lock_page(page);
wait_on_page_writeback(page);
@@ -494,7 +526,7 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
if (inode && S_ISDIR(inode->i_mode)) {
drop_nlink(dir);
- f2fs_write_inode(dir, NULL);
+ update_inode_page(dir);
} else {
mark_inode_dirty(dir);
}
@@ -506,7 +538,8 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
drop_nlink(inode);
i_size_write(inode, 0);
}
- f2fs_write_inode(inode, NULL);
+ update_inode_page(inode);
+
if (inode->i_nlink == 0)
add_orphan_inode(sbi, inode->i_ino);
}
@@ -519,45 +552,6 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
inode_dec_dirty_dents(dir);
}
f2fs_put_page(page, 1);
-
- mutex_unlock_op(sbi, DENTRY_OPS);
-}
-
-int f2fs_make_empty(struct inode *inode, struct inode *parent)
-{
- struct page *dentry_page;
- struct f2fs_dentry_block *dentry_blk;
- struct f2fs_dir_entry *de;
- void *kaddr;
-
- dentry_page = get_new_data_page(inode, 0, true);
- if (IS_ERR(dentry_page))
- return PTR_ERR(dentry_page);
-
- kaddr = kmap_atomic(dentry_page);
- dentry_blk = (struct f2fs_dentry_block *)kaddr;
-
- de = &dentry_blk->dentry[0];
- de->name_len = cpu_to_le16(1);
- de->hash_code = f2fs_dentry_hash(".", 1);
- de->ino = cpu_to_le32(inode->i_ino);
- memcpy(dentry_blk->filename[0], ".", 1);
- set_de_type(de, inode);
-
- de = &dentry_blk->dentry[1];
- de->hash_code = f2fs_dentry_hash("..", 2);
- de->name_len = cpu_to_le16(2);
- de->ino = cpu_to_le32(parent->i_ino);
- memcpy(dentry_blk->filename[1], "..", 2);
- set_de_type(de, inode);
-
- test_and_set_bit_le(0, &dentry_blk->dentry_bitmap);
- test_and_set_bit_le(1, &dentry_blk->dentry_bitmap);
- kunmap_atomic(kaddr);
-
- set_page_dirty(dentry_page);
- f2fs_put_page(dentry_page, 1);
- return 0;
}
bool f2fs_empty_dir(struct inode *dir)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.