f2fs: check cap_resource only for data blocks

Cherry-pick from origin/upstream-f2fs-stable-linux-4.9.y:
commit c8fb24500dfe ("f2fs: check cap_resource only for data blocks")

This patch changes the rule to check cap_resource for data blocks, not inode
or node blocks in order to avoid selinux denial.

Change-Id: I7b4135b6abc33f4786c982e37ca6e1d3f3fe1f69
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 7d586b3..84be1e7 100644 (file)
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1612,7 +1612,7 @@ static inline bool f2fs_has_xattr_block(unsigned int ofs)
 }
 
 static inline bool __allow_reserved_blocks(struct f2fs_sb_info *sbi,
-                                       struct inode *inode)
+                                       struct inode *inode, bool cap)
 {
        if (!inode)
                return true;
@@ -1625,7 +1625,7 @@ static inline bool __allow_reserved_blocks(struct f2fs_sb_info *sbi,
        if (!gid_eq(F2FS_OPTION(sbi).s_resgid, GLOBAL_ROOT_GID) &&
                                        in_group_p(F2FS_OPTION(sbi).s_resgid))
                return true;
-       if (capable(CAP_SYS_RESOURCE))
+       if (cap && capable(CAP_SYS_RESOURCE))
                return true;
        return false;
 }
@@ -1660,7 +1660,7 @@ static inline int inc_valid_block_count(struct f2fs_sb_info *sbi,
        avail_user_block_count = sbi->user_block_count -
                                        sbi->current_reserved_blocks;
 
-       if (!__allow_reserved_blocks(sbi, inode))
+       if (!__allow_reserved_blocks(sbi, inode, true))
                avail_user_block_count -= F2FS_OPTION(sbi).root_reserved_blocks;
 
        if (unlikely(sbi->total_valid_block_count > avail_user_block_count)) {
@@ -1867,7 +1867,7 @@ static inline int inc_valid_node_count(struct f2fs_sb_info *sbi,
        valid_block_count = sbi->total_valid_block_count +
                                        sbi->current_reserved_blocks + 1;
 
-       if (!__allow_reserved_blocks(sbi, inode))
+       if (!__allow_reserved_blocks(sbi, inode, false))
                valid_block_count += F2FS_OPTION(sbi).root_reserved_blocks;
 
        if (unlikely(valid_block_count > sbi->user_block_count)) {