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fs: call rename2 if exists

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Christoph Hellwig suggests:

1) make vfs_rename call ->rename2 if it exists instead of ->rename
2) switch all filesystems that you're adding NOREPLACE support for to
   use ->rename2
3) see how many ->rename instances we'll have left after a few
   iterations of 2.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Miklos Szeredi 2014-07-23 15:15:30 +02:00 committed by Al Viro
parent 2577d92ebd
commit 7177a9c4b5
3 changed files with 3 additions and 10 deletions
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1
fs/ext4/namei.c
View File

@ -3455,7 +3455,6 @@ const struct inode_operations ext4_dir_inode_operations = {
.rmdir = ext4_rmdir,
.mknod = ext4_mknod,
.tmpfile = ext4_tmpfile,
.rename = ext4_rename,
.rename2 = ext4_rename2,
.setattr = ext4_setattr,
.setxattr = generic_setxattr,

7
fs/fuse/dir.c
View File

@ -845,12 +845,6 @@ static int fuse_rename2(struct inode *olddir, struct dentry *oldent,
return err;
}
static int fuse_rename(struct inode *olddir, struct dentry *oldent,
struct inode *newdir, struct dentry *newent)
{
return fuse_rename2(olddir, oldent, newdir, newent, 0);
}
static int fuse_link(struct dentry *entry, struct inode *newdir,
struct dentry *newent)
{
@ -2024,7 +2018,6 @@ static const struct inode_operations fuse_dir_inode_operations = {
.symlink = fuse_symlink,
.unlink = fuse_unlink,
.rmdir = fuse_rmdir,
.rename = fuse_rename,
.rename2 = fuse_rename2,
.link = fuse_link,
.setattr = fuse_setattr,

5
fs/namei.c
View File

@ -4075,7 +4075,7 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (error)
return error;
if (!old_dir->i_op->rename)
if (!old_dir->i_op->rename && !old_dir->i_op->rename2)
return -EPERM;
if (flags && !old_dir->i_op->rename2)
@ -4134,10 +4134,11 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (error)
goto out;
}
if (!flags) {
if (!old_dir->i_op->rename2) {
error = old_dir->i_op->rename(old_dir, old_dentry,
new_dir, new_dentry);
} else {
WARN_ON(old_dir->i_op->rename != NULL);
error = old_dir->i_op->rename2(old_dir, old_dentry,
new_dir, new_dentry, flags);
}