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| author | Lorenz Bauer <lmb@cloudflare.com> | 2021-10-28 10:47:21 +0100 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2021-11-03 15:43:00 +0100 |
| commit | 6429e46304ac7820eebbea2bf5d73b90c18e0e06 (patch) | |
| tree | 0a3b4bec45a6400ff157f66d5d994397b6c2dcbb /fs/libfs.c | |
| parent | 92f62485b3715882cd397b0cbd80a96d179b86d6 (diff) | |
| download | linux-6429e46304ac7820eebbea2bf5d73b90c18e0e06.tar.gz | |
libfs: Move shmem_exchange to simple_rename_exchange
Move shmem_exchange and make it available to other callers. Suggested-by: Miklos Szeredi <mszeredi@redhat.com> Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christian Brauner <christian.brauner@ubuntu.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/bpf/20211028094724.59043-2-lmb@cloudflare.com
Diffstat (limited to 'fs/libfs.c')
| -rw-r--r-- | fs/libfs.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/fs/libfs.c b/fs/libfs.c index 51b4de3b3447..1cf144dc9ed2 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -448,6 +448,30 @@ int simple_rmdir(struct inode *dir, struct dentry *dentry) } EXPORT_SYMBOL(simple_rmdir); +int simple_rename_exchange(struct inode *old_dir, struct dentry *old_dentry, + struct inode *new_dir, struct dentry *new_dentry) +{ + bool old_is_dir = d_is_dir(old_dentry); + bool new_is_dir = d_is_dir(new_dentry); + + if (old_dir != new_dir && old_is_dir != new_is_dir) { + if (old_is_dir) { + drop_nlink(old_dir); + inc_nlink(new_dir); + } else { + drop_nlink(new_dir); + inc_nlink(old_dir); + } + } + old_dir->i_ctime = old_dir->i_mtime = + new_dir->i_ctime = new_dir->i_mtime = + d_inode(old_dentry)->i_ctime = + d_inode(new_dentry)->i_ctime = current_time(old_dir); + + return 0; +} +EXPORT_SYMBOL_GPL(simple_rename_exchange); + int simple_rename(struct user_namespace *mnt_userns, struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry, unsigned int flags) |