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| author | Miklos Szeredi <mszeredi@redhat.com> | 2016-06-12 12:05:21 +0200 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2016-06-12 12:05:21 +0200 |
| commit | 30402c8949934fbaca07d9c20074d0d7a5a8385f (patch) | |
| tree | f63ddb91f4bed559358c2478f61718a5b23f99b1 | |
| parent | b581755b1c565391c72d03b157ba2dd0b18e9d15 (diff) | |
| parent | eb0a4a47ae89aaa0674ab3180de6a162f3be2ddf (diff) | |
| download | linux-30402c8949934fbaca07d9c20074d0d7a5a8385f.tar.gz linux-30402c8949934fbaca07d9c20074d0d7a5a8385f.tar.bz2 linux-30402c8949934fbaca07d9c20074d0d7a5a8385f.zip | |
Merge branch 'overlayfs-af_unix-fix' into overlayfs-linus
| -rw-r--r-- | include/linux/dcache.h | 12 | ||||
| -rw-r--r-- | net/unix/af_unix.c | 6 |
2 files changed, 15 insertions, 3 deletions
diff --git a/include/linux/dcache.h b/include/linux/dcache.h index 484c8792da82..f28100f6b556 100644 --- a/include/linux/dcache.h +++ b/include/linux/dcache.h @@ -575,5 +575,17 @@ static inline struct inode *vfs_select_inode(struct dentry *dentry, return inode; } +/** + * d_real_inode - Return the real inode + * @dentry: The dentry to query + * + * If dentry is on an union/overlay, then return the underlying, real inode. + * Otherwise return d_inode(). + */ +static inline struct inode *d_real_inode(struct dentry *dentry) +{ + return d_backing_inode(d_real(dentry)); +} + #endif /* __LINUX_DCACHE_H */ diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 80aa6a3e6817..735362c26c8e 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -315,7 +315,7 @@ static struct sock *unix_find_socket_byinode(struct inode *i) &unix_socket_table[i->i_ino & (UNIX_HASH_SIZE - 1)]) { struct dentry *dentry = unix_sk(s)->path.dentry; - if (dentry && d_backing_inode(dentry) == i) { + if (dentry && d_real_inode(dentry) == i) { sock_hold(s); goto found; } @@ -911,7 +911,7 @@ static struct sock *unix_find_other(struct net *net, err = kern_path(sunname->sun_path, LOOKUP_FOLLOW, &path); if (err) goto fail; - inode = d_backing_inode(path.dentry); + inode = d_real_inode(path.dentry); err = inode_permission(inode, MAY_WRITE); if (err) goto put_fail; @@ -1048,7 +1048,7 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) goto out_up; } addr->hash = UNIX_HASH_SIZE; - hash = d_backing_inode(dentry)->i_ino & (UNIX_HASH_SIZE - 1); + hash = d_real_inode(dentry)->i_ino & (UNIX_HASH_SIZE - 1); spin_lock(&unix_table_lock); u->path = u_path; list = &unix_socket_table[hash]; |