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| author | Vivek Goyal <vgoyal@redhat.com> | 2018-05-11 11:49:27 -0400 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2018-07-20 09:56:05 +0200 |
| commit | 9cec54c83a8baba3099bb8b445a735b93ab9511f (patch) | |
| tree | 7e85b17c21e9a38ea73f14ba10bc9e3a115c1ead | |
| parent | 0c31d675aad949e5dfecf7a32813514423e6c766 (diff) | |
| download | linux-9cec54c83a8baba3099bb8b445a735b93ab9511f.tar.bz2 | |
ovl: Initialize ovl_inode->redirect in ovl_get_inode()
ovl_inode->redirect is an inode property and should be initialized in
ovl_get_inode() only when we are adding a new inode to cache. If inode is
already in cache, it is already initialized and we should not be touching
ovl_inode->redirect field.
As of now this is not a problem as redirects are used only for directories
which don't share inode. But soon I want to use redirects for regular
files also and there it can become an issue.
Hence, move ->redirect initialization in ovl_get_inode().
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
| -rw-r--r-- | fs/overlayfs/inode.c | 3 | ||||
| -rw-r--r-- | fs/overlayfs/namei.c | 8 | ||||
| -rw-r--r-- | fs/overlayfs/overlayfs.h | 1 |
3 files changed, 5 insertions, 7 deletions
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index 28ee802e6eaf..4833545d709b 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -844,6 +844,7 @@ struct inode *ovl_get_inode(struct super_block *sb, } dput(upperdentry); + kfree(oip->redirect); goto out; } @@ -867,6 +868,8 @@ struct inode *ovl_get_inode(struct super_block *sb, if (oip->index) ovl_set_flag(OVL_INDEX, inode); + OVL_I(inode)->redirect = oip->redirect; + /* Check for non-merge dir that may have whiteouts */ if (is_dir) { if (((upperdentry && lowerdentry) || oip->numlower > 1) || diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c index c993dd8db739..ebc377bd010a 100644 --- a/fs/overlayfs/namei.c +++ b/fs/overlayfs/namei.c @@ -1009,19 +1009,13 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry, .lowerpath = stack, .index = index, .numlower = ctr, + .redirect = upperredirect, }; inode = ovl_get_inode(dentry->d_sb, &oip); err = PTR_ERR(inode); if (IS_ERR(inode)) goto out_free_oe; - - /* - * NB: handle redirected hard links when non-dir redirects - * become possible - */ - WARN_ON(OVL_I(inode)->redirect); - OVL_I(inode)->redirect = upperredirect; } revert_creds(old_cred); diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 16d439ebfe02..69010e3dd846 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -335,6 +335,7 @@ struct ovl_inode_params { struct ovl_path *lowerpath; struct dentry *index; unsigned int numlower; + char *redirect; }; struct inode *ovl_new_inode(struct super_block *sb, umode_t mode, dev_t rdev); struct inode *ovl_lookup_inode(struct super_block *sb, struct dentry *real, |