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ceph: implement i_op->atomic_open()

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Add an ->atomic_open implementation which replaces the atomic lookup+open+create
operation implemented via ->lookup and ->create operations.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Miklos Szeredi
2012-06-05 15:10:25 +02:00
committed by Al Viro
parent 3819219b59
commit 2d83bde9a1
3 changed files with 56 additions and 38 deletions
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21
fs/ceph/file.c
View File

@@ -213,21 +213,15 @@ out:
* may_open() fails, the struct *file gets cleaned up (i.e.
* ceph_release gets called). So fear not!
*/
/*
* flags
* path_lookup_open -> LOOKUP_OPEN
* path_lookup_create -> LOOKUP_OPEN|LOOKUP_CREATE
*/
struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
struct nameidata *nd, int mode)
struct file *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
struct opendata *od, unsigned flags, umode_t mode)
{
struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
struct ceph_mds_client *mdsc = fsc->mdsc;
struct file *file;
struct file *file = NULL;
struct ceph_mds_request *req;
struct dentry *ret;
int err;
int flags = nd->intent.open.flags;
dout("ceph_lookup_open dentry %p '%.*s' flags %d mode 0%o\n",
dentry, dentry->d_name.len, dentry->d_name.name, flags, mode);
@@ -253,14 +247,19 @@ struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
err = ceph_handle_notrace_create(dir, dentry);
if (err)
goto out;
file = lookup_instantiate_filp(nd, req->r_dentry, ceph_open);
file = finish_open(od, req->r_dentry, ceph_open);
if (IS_ERR(file))
err = PTR_ERR(file);
out:
ret = ceph_finish_lookup(req, dentry, err);
ceph_mdsc_put_request(req);
dout("ceph_lookup_open result=%p\n", ret);
return ret;
if (IS_ERR(ret))
return ERR_CAST(ret);
dput(ret);
return err ? ERR_PTR(err) : file;
}
int ceph_release(struct inode *inode, struct file *file)