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fs: make remaining filesystems use .rename2

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This is trivial to do:

 - add flags argument to foo_rename()
 - check if flags is zero
 - assign foo_rename() to .rename2 instead of .rename

This doesn't mean it's impossible to support RENAME_NOREPLACE for these
filesystems, but it is not trivial, like for local filesystems.
RENAME_NOREPLACE must guarantee atomicity (i.e. it shouldn't be possible
for a file to be created on one host while it is overwritten by rename on
another host).

Filesystems converted:

9p, afs, ceph, coda, ecryptfs, kernfs, lustre, ncpfs, nfs, ocfs2, orangefs.

After this, we can get rid of the duplicate interfaces for rename.

Signed-off-by: Miklos Szeredi <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Acked-by: David Howells <[email protected]> [AFS]
Acked-by: Mike Marshall <[email protected]>
Cc: Eric Van Hensbergen <[email protected]>
Cc: Ilya Dryomov <[email protected]>
Cc: Jan Harkes <[email protected]>
Cc: Tyler Hicks <[email protected]>
Cc: Oleg Drokin <[email protected]>
Cc: Trond Myklebust <[email protected]>
Cc: Mark Fasheh <[email protected]>
This commit is contained in:
Miklos Szeredi 2016-09-27 11:03:58 +02:00
commit 1cd66c93ba
17 changed files with 78 additions and 31 deletions
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11
fs/afs/dir.c
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@ -38,7 +38,8 @@ static int afs_link(struct dentry *from, struct inode *dir,
static int afs_symlink(struct inode *dir, struct dentry *dentry,
const char *content);
static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry);
struct inode *new_dir, struct dentry *new_dentry,
unsigned int flags);
const struct file_operations afs_dir_file_operations = {
.open = afs_dir_open,
@ -56,7 +57,7 @@ const struct inode_operations afs_dir_inode_operations = {
.symlink = afs_symlink,
.mkdir = afs_mkdir,
.rmdir = afs_rmdir,
.rename = afs_rename,
.rename2 = afs_rename,
.permission = afs_permission,
.getattr = afs_getattr,
.setattr = afs_setattr,
@ -1083,12 +1084,16 @@ error:
* rename a file in an AFS filesystem and/or move it between directories
*/
static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
struct inode *new_dir, struct dentry *new_dentry,
unsigned int flags)
{
struct afs_vnode *orig_dvnode, *new_dvnode, *vnode;
struct key *key;
int ret;
if (flags)
return -EINVAL;
vnode = AFS_FS_I(d_inode(old_dentry));
orig_dvnode = AFS_FS_I(old_dir);
new_dvnode = AFS_FS_I(new_dir);