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ovl: copy up inode flags

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On inode creation copy certain inode flags from the underlying real inode
to the overlay inode.

This is in preparation for moving overlay functionality out of the VFS.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Miklos Szeredi 2018-07-18 15:44:41 +02:00
parent d9854c87f0
commit 4f3572954a
2 changed files with 8 additions and 0 deletions
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7
fs/overlayfs/overlayfs.h
View File

@ -350,6 +350,13 @@ static inline void ovl_copyattr(struct inode *from, struct inode *to)
to->i_ctime = from->i_ctime;
}
static inline void ovl_copyflags(struct inode *from, struct inode *to)
{
unsigned int mask = S_SYNC | S_IMMUTABLE | S_APPEND | S_NOATIME;
inode_set_flags(to, from->i_flags & mask, mask);
}
/* dir.c */
extern const struct inode_operations ovl_dir_inode_operations;
int ovl_cleanup_and_whiteout(struct dentry *workdir, struct inode *dir,

1
fs/overlayfs/util.c
View File

@ -310,6 +310,7 @@ void ovl_inode_init(struct inode *inode, struct dentry *upperdentry,
OVL_I(inode)->lower = igrab(d_inode(lowerdentry));
ovl_copyattr(realinode, inode);
ovl_copyflags(realinode, inode);
if (!inode->i_ino)
inode->i_ino = realinode->i_ino;
}