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authorChristian Brauner <christian.brauner@ubuntu.com>2021-01-21 16:19:32 +0300
committerChristian Brauner <christian.brauner@ubuntu.com>2021-01-24 16:27:18 +0300
commit9fe61450972d3900bffb1dc26a17ebb9cdd92db2 (patch)
tree895d7d6485f03c01afa9f1b575e59878162f9373
parentba73d98745be1c10dc3cce68e8d7b95012d07d05 (diff)
downloadlinux-9fe61450972d3900bffb1dc26a17ebb9cdd92db2.tar.xz
namei: introduce struct renamedata
In order to handle idmapped mounts we will extend the vfs rename helper to take two new arguments in follow up patches. Since this operations already takes a bunch of arguments add a simple struct renamedata and make the current helper use it before we extend it. Link: https://lore.kernel.org/r/20210121131959.646623-14-christian.brauner@ubuntu.com Cc: Christoph Hellwig <hch@lst.de> Cc: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
-rw-r--r--fs/cachefiles/namei.c9
-rw-r--r--fs/ecryptfs/inode.c10
-rw-r--r--fs/namei.c21
-rw-r--r--fs/nfsd/vfs.c8
-rw-r--r--fs/overlayfs/overlayfs.h9
-rw-r--r--include/linux/fs.h12
6 files changed, 55 insertions, 14 deletions
diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c
index ecc8ecbbfa5a..7b987de0babe 100644
--- a/fs/cachefiles/namei.c
+++ b/fs/cachefiles/namei.c
@@ -412,9 +412,14 @@ try_again:
if (ret < 0) {
cachefiles_io_error(cache, "Rename security error %d", ret);
} else {
+ struct renamedata rd = {
+ .old_dir = d_inode(dir),
+ .old_dentry = rep,
+ .new_dir = d_inode(cache->graveyard),
+ .new_dentry = grave,
+ };
trace_cachefiles_rename(object, rep, grave, why);
- ret = vfs_rename(d_inode(dir), rep,
- d_inode(cache->graveyard), grave, NULL, 0);
+ ret = vfs_rename(&rd);
if (ret != 0 && ret != -ENOMEM)
cachefiles_io_error(cache,
"Rename failed with error %d", ret);
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 385b5e8741c0..ff48abb09679 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -590,6 +590,7 @@ ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct dentry *lower_new_dir_dentry;
struct dentry *trap;
struct inode *target_inode;
+ struct renamedata rd = {};
if (flags)
return -EINVAL;
@@ -619,9 +620,12 @@ ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
rc = -ENOTEMPTY;
goto out_lock;
}
- rc = vfs_rename(d_inode(lower_old_dir_dentry), lower_old_dentry,
- d_inode(lower_new_dir_dentry), lower_new_dentry,
- NULL, 0);
+
+ rd.old_dir = d_inode(lower_old_dir_dentry);
+ rd.old_dentry = lower_old_dentry;
+ rd.new_dir = d_inode(lower_new_dir_dentry);
+ rd.new_dentry = lower_new_dentry;
+ rc = vfs_rename(&rd);
if (rc)
goto out_lock;
if (target_inode)
diff --git a/fs/namei.c b/fs/namei.c
index 93fa7d803fb2..38ab51881247 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -4311,12 +4311,15 @@ SYSCALL_DEFINE2(link, const char __user *, oldname, const char __user *, newname
* ->i_mutex on parents, which works but leads to some truly excessive
* locking].
*/
-int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry,
- struct inode **delegated_inode, unsigned int flags)
+int vfs_rename(struct renamedata *rd)
{
int error;
struct user_namespace *mnt_userns = &init_user_ns;
+ struct inode *old_dir = rd->old_dir, *new_dir = rd->new_dir;
+ struct dentry *old_dentry = rd->old_dentry;
+ struct dentry *new_dentry = rd->new_dentry;
+ struct inode **delegated_inode = rd->delegated_inode;
+ unsigned int flags = rd->flags;
bool is_dir = d_is_dir(old_dentry);
struct inode *source = old_dentry->d_inode;
struct inode *target = new_dentry->d_inode;
@@ -4442,6 +4445,7 @@ EXPORT_SYMBOL(vfs_rename);
int do_renameat2(int olddfd, struct filename *from, int newdfd,
struct filename *to, unsigned int flags)
{
+ struct renamedata rd;
struct dentry *old_dentry, *new_dentry;
struct dentry *trap;
struct path old_path, new_path;
@@ -4545,9 +4549,14 @@ retry_deleg:
&new_path, new_dentry, flags);
if (error)
goto exit5;
- error = vfs_rename(old_path.dentry->d_inode, old_dentry,
- new_path.dentry->d_inode, new_dentry,
- &delegated_inode, flags);
+
+ rd.old_dir = old_path.dentry->d_inode;
+ rd.old_dentry = old_dentry;
+ rd.new_dir = new_path.dentry->d_inode;
+ rd.new_dentry = new_dentry;
+ rd.delegated_inode = &delegated_inode;
+ rd.flags = flags;
+ error = vfs_rename(&rd);
exit5:
dput(new_dentry);
exit4:
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 37d85046b4d6..f7d83ff2b44e 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1798,7 +1798,13 @@ retry:
close_cached = true;
goto out_dput_old;
} else {
- host_err = vfs_rename(fdir, odentry, tdir, ndentry, NULL, 0);
+ struct renamedata rd = {
+ .old_dir = fdir,
+ .old_dentry = odentry,
+ .new_dir = tdir,
+ .new_dentry = ndentry,
+ };
+ host_err = vfs_rename(&rd);
if (!host_err) {
host_err = commit_metadata(tfhp);
if (!host_err)
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 0002834f664a..426899681df7 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -214,9 +214,16 @@ static inline int ovl_do_rename(struct inode *olddir, struct dentry *olddentry,
unsigned int flags)
{
int err;
+ struct renamedata rd = {
+ .old_dir = olddir,
+ .old_dentry = olddentry,
+ .new_dir = newdir,
+ .new_dentry = newdentry,
+ .flags = flags,
+ };
pr_debug("rename(%pd2, %pd2, 0x%x)\n", olddentry, newdentry, flags);
- err = vfs_rename(olddir, olddentry, newdir, newdentry, NULL, flags);
+ err = vfs_rename(&rd);
if (err) {
pr_debug("...rename(%pd2, %pd2, ...) = %i\n",
olddentry, newdentry, err);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index a27884af7222..430e457f67f1 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1775,7 +1775,17 @@ extern int vfs_symlink(struct inode *, struct dentry *, const char *);
extern int vfs_link(struct dentry *, struct inode *, struct dentry *, struct inode **);
extern int vfs_rmdir(struct inode *, struct dentry *);
extern int vfs_unlink(struct inode *, struct dentry *, struct inode **);
-extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *, struct inode **, unsigned int);
+
+struct renamedata {
+ struct inode *old_dir;
+ struct dentry *old_dentry;
+ struct inode *new_dir;
+ struct dentry *new_dentry;
+ struct inode **delegated_inode;
+ unsigned int flags;
+} __randomize_layout;
+
+int vfs_rename(struct renamedata *);
static inline int vfs_whiteout(struct inode *dir, struct dentry *dentry)
{