f2fs: introduce private inode status mapping

Previously, we use generic FS_*_FL defined by vfs to indicate inode status
for each bit of i_flags, so f2fs's flag status definition is tied to vfs'
one, it will be hard for f2fs to reuse bits f2fs never used to indicate
new status..

In order to solve this issue, we introduce private inode status mapping,
Note, for these bits have already been persisted into disk, we should
never change their definition, for other ones, we can remap them for
later new coming status.

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

1 files changed, 23 insertions, 31 deletions

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index bd81207206d8..ff6a59c1a3a3 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -686,16 +686,16 @@ int f2fs_getattr(const struct path *path, struct kstat *stat,
 		stat->btime.tv_nsec = fi->i_crtime.tv_nsec;
 	}
 
-	flags = fi->i_flags & (FS_FL_USER_VISIBLE | FS_PROJINHERIT_FL);
-	if (flags & FS_APPEND_FL)
+	flags = fi->i_flags & (F2FS_FL_USER_VISIBLE | F2FS_PROJINHERIT_FL);
+	if (flags & F2FS_APPEND_FL)
 		stat->attributes |= STATX_ATTR_APPEND;
-	if (flags & FS_COMPR_FL)
+	if (flags & F2FS_COMPR_FL)
 		stat->attributes |= STATX_ATTR_COMPRESSED;
 	if (f2fs_encrypted_inode(inode))
 		stat->attributes |= STATX_ATTR_ENCRYPTED;
-	if (flags & FS_IMMUTABLE_FL)
+	if (flags & F2FS_IMMUTABLE_FL)
 		stat->attributes |= STATX_ATTR_IMMUTABLE;
-	if (flags & FS_NODUMP_FL)
+	if (flags & F2FS_NODUMP_FL)
 		stat->attributes |= STATX_ATTR_NODUMP;
 
 	stat->attributes_mask |= (STATX_ATTR_APPEND |
@@ -1585,7 +1585,7 @@ static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
 	struct inode *inode = file_inode(filp);
 	struct f2fs_inode_info *fi = F2FS_I(inode);
 	unsigned int flags = fi->i_flags &
-			(FS_FL_USER_VISIBLE | FS_PROJINHERIT_FL);
+			(F2FS_FL_USER_VISIBLE | F2FS_PROJINHERIT_FL);
 	return put_user(flags, (int __user *)arg);
 }
 
@@ -1602,15 +1602,15 @@ static int __f2fs_ioc_setflags(struct inode *inode, unsigned int flags)
 
 	oldflags = fi->i_flags;
 
-	if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL))
+	if ((flags ^ oldflags) & (F2FS_APPEND_FL | F2FS_IMMUTABLE_FL))
 		if (!capable(CAP_LINUX_IMMUTABLE))
 			return -EPERM;
 
-	flags = flags & (FS_FL_USER_MODIFIABLE | FS_PROJINHERIT_FL);
-	flags |= oldflags & ~(FS_FL_USER_MODIFIABLE | FS_PROJINHERIT_FL);
+	flags = flags & (F2FS_FL_USER_MODIFIABLE | F2FS_PROJINHERIT_FL);
+	flags |= oldflags & ~(F2FS_FL_USER_MODIFIABLE | F2FS_PROJINHERIT_FL);
 	fi->i_flags = flags;
 
-	if (fi->i_flags & FS_PROJINHERIT_FL)
+	if (fi->i_flags & F2FS_PROJINHERIT_FL)
 		set_inode_flag(inode, FI_PROJ_INHERIT);
 	else
 		clear_inode_flag(inode, FI_PROJ_INHERIT);
@@ -2601,17 +2601,17 @@ static inline __u32 f2fs_iflags_to_xflags(unsigned long iflags)
 {
 	__u32 xflags = 0;
 
-	if (iflags & FS_SYNC_FL)
+	if (iflags & F2FS_SYNC_FL)
 		xflags |= FS_XFLAG_SYNC;
-	if (iflags & FS_IMMUTABLE_FL)
+	if (iflags & F2FS_IMMUTABLE_FL)
 		xflags |= FS_XFLAG_IMMUTABLE;
-	if (iflags & FS_APPEND_FL)
+	if (iflags & F2FS_APPEND_FL)
 		xflags |= FS_XFLAG_APPEND;
-	if (iflags & FS_NODUMP_FL)
+	if (iflags & F2FS_NODUMP_FL)
 		xflags |= FS_XFLAG_NODUMP;
-	if (iflags & FS_NOATIME_FL)
+	if (iflags & F2FS_NOATIME_FL)
 		xflags |= FS_XFLAG_NOATIME;
-	if (iflags & FS_PROJINHERIT_FL)
+	if (iflags & F2FS_PROJINHERIT_FL)
 		xflags |= FS_XFLAG_PROJINHERIT;
 	return xflags;
 }
@@ -2620,31 +2620,23 @@ static inline __u32 f2fs_iflags_to_xflags(unsigned long iflags)
 				  FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
 				  FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
 
-/* Flags we can manipulate with through EXT4_IOC_FSSETXATTR */
-#define F2FS_FL_XFLAG_VISIBLE		(FS_SYNC_FL | \
-					 FS_IMMUTABLE_FL | \
-					 FS_APPEND_FL | \
-					 FS_NODUMP_FL | \
-					 FS_NOATIME_FL | \
-					 FS_PROJINHERIT_FL)
-
 /* Transfer xflags flags to internal */
 static inline unsigned long f2fs_xflags_to_iflags(__u32 xflags)
 {
 	unsigned long iflags = 0;
 
 	if (xflags & FS_XFLAG_SYNC)
-		iflags |= FS_SYNC_FL;
+		iflags |= F2FS_SYNC_FL;
 	if (xflags & FS_XFLAG_IMMUTABLE)
-		iflags |= FS_IMMUTABLE_FL;
+		iflags |= F2FS_IMMUTABLE_FL;
 	if (xflags & FS_XFLAG_APPEND)
-		iflags |= FS_APPEND_FL;
+		iflags |= F2FS_APPEND_FL;
 	if (xflags & FS_XFLAG_NODUMP)
-		iflags |= FS_NODUMP_FL;
+		iflags |= F2FS_NODUMP_FL;
 	if (xflags & FS_XFLAG_NOATIME)
-		iflags |= FS_NOATIME_FL;
+		iflags |= F2FS_NOATIME_FL;
 	if (xflags & FS_XFLAG_PROJINHERIT)
-		iflags |= FS_PROJINHERIT_FL;
+		iflags |= F2FS_PROJINHERIT_FL;
 
 	return iflags;
 }
@@ -2657,7 +2649,7 @@ static int f2fs_ioc_fsgetxattr(struct file *filp, unsigned long arg)
 
 	memset(&fa, 0, sizeof(struct fsxattr));
 	fa.fsx_xflags = f2fs_iflags_to_xflags(fi->i_flags &
-				(FS_FL_USER_VISIBLE | FS_PROJINHERIT_FL));
+				(F2FS_FL_USER_VISIBLE | F2FS_PROJINHERIT_FL));
 
 	if (f2fs_sb_has_project_quota(inode->i_sb))
 		fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,