Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[~andy/linux] / fs / fuse / dir.c

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 334e0b18a014c72bf78583f76a6c3b02f9058181..8964cf3999b2bb561ec71d93914170529f72977a 100644 (file)
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -154,7 +154,7 @@ u64 fuse_get_attr_version(struct fuse_conn *fc)
  * the lookup once more.  If the lookup results in the same inode,
  * then refresh the attributes, timeouts and mark the dentry valid.
  */
-static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
+static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags)
 {
        struct inode *inode;
 
@@ -174,7 +174,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
                if (!inode)
                        return 0;
 
-               if (nd && (nd->flags & LOOKUP_RCU))
+               if (flags & LOOKUP_RCU)
                        return -ECHILD;
 
                fc = get_fuse_conn(inode);
@@ -249,7 +249,7 @@ static struct dentry *fuse_d_add_directory(struct dentry *entry,
                /* This tries to shrink the subtree below alias */
                fuse_invalidate_entry(alias);
                dput(alias);
-               if (!list_empty(&inode->i_dentry))
+               if (!hlist_empty(&inode->i_dentry))
                        return ERR_PTR(-EBUSY);
        } else {
                dput(alias);
@@ -316,7 +316,7 @@ int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name,
 }
 
 static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
-                                 struct nameidata *nd)
+                                 unsigned int flags)
 {
        int err;
        struct fuse_entry_out outarg;
@@ -370,7 +370,8 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
  * 'mknod' + 'open' requests.
  */
 static int fuse_create_open(struct inode *dir, struct dentry *entry,
-                           umode_t mode, struct nameidata *nd)
+                           struct file *file, unsigned flags,
+                           umode_t mode, int *opened)
 {
        int err;
        struct inode *inode;
@@ -381,15 +382,11 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
        struct fuse_open_out outopen;
        struct fuse_entry_out outentry;
        struct fuse_file *ff;
-       struct file *file;
-       int flags = nd->intent.open.flags;
-
-       if (fc->no_create)
-               return -ENOSYS;
 
        forget = fuse_alloc_forget();
+       err = -ENOMEM;
        if (!forget)
-               return -ENOMEM;
+               goto out_err;
 
        req = fuse_get_req(fc);
        err = PTR_ERR(req);
@@ -428,11 +425,8 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
        req->out.args[1].value = &outopen;
        fuse_request_send(fc, req);
        err = req->out.h.error;
-       if (err) {
-               if (err == -ENOSYS)
-                       fc->no_create = 1;
+       if (err)
                goto out_free_ff;
-       }
 
        err = -EIO;
        if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid))
@@ -448,28 +442,74 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
                flags &= ~(O_CREAT | O_EXCL | O_TRUNC);
                fuse_sync_release(ff, flags);
                fuse_queue_forget(fc, forget, outentry.nodeid, 1);
-               return -ENOMEM;
+               err = -ENOMEM;
+               goto out_err;
        }
        kfree(forget);
        d_instantiate(entry, inode);
        fuse_change_entry_timeout(entry, &outentry);
        fuse_invalidate_attr(dir);
-       file = lookup_instantiate_filp(nd, entry, generic_file_open);
-       if (IS_ERR(file)) {
+       err = finish_open(file, entry, generic_file_open, opened);
+       if (err) {
                fuse_sync_release(ff, flags);
-               return PTR_ERR(file);
+       } else {
+               file->private_data = fuse_file_get(ff);
+               fuse_finish_open(inode, file);
        }
-       file->private_data = fuse_file_get(ff);
-       fuse_finish_open(inode, file);
-       return 0;
+       return err;
 
- out_free_ff:
+out_free_ff:
        fuse_file_free(ff);
- out_put_request:
+out_put_request:
        fuse_put_request(fc, req);
- out_put_forget_req:
+out_put_forget_req:
        kfree(forget);
+out_err:
+       return err;
+}
+
+static int fuse_mknod(struct inode *, struct dentry *, umode_t, dev_t);
+static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
+                           struct file *file, unsigned flags,
+                           umode_t mode, int *opened)
+{
+       int err;
+       struct fuse_conn *fc = get_fuse_conn(dir);
+       struct dentry *res = NULL;
+
+       if (d_unhashed(entry)) {
+               res = fuse_lookup(dir, entry, 0);
+               if (IS_ERR(res))
+                       return PTR_ERR(res);
+
+               if (res)
+                       entry = res;
+       }
+
+       if (!(flags & O_CREAT) || entry->d_inode)
+               goto no_open;
+
+       /* Only creates */
+       *opened |= FILE_CREATED;
+
+       if (fc->no_create)
+               goto mknod;
+
+       err = fuse_create_open(dir, entry, file, flags, mode, opened);
+       if (err == -ENOSYS) {
+               fc->no_create = 1;
+               goto mknod;
+       }
+out_dput:
+       dput(res);
        return err;
+
+mknod:
+       err = fuse_mknod(dir, entry, mode, 0);
+       if (err)
+               goto out_dput;
+no_open:
+       return finish_no_open(file, res);
 }
 
 /*
@@ -571,14 +611,8 @@ static int fuse_mknod(struct inode *dir, struct dentry *entry, umode_t mode,
 }
 
 static int fuse_create(struct inode *dir, struct dentry *entry, umode_t mode,
-                      struct nameidata *nd)
+                      bool excl)
 {
-       if (nd) {
-               int err = fuse_create_open(dir, entry, mode, nd);
-               if (err != -ENOSYS)
-                       return err;
-               /* Fall back on mknod */
-       }
        return fuse_mknod(dir, entry, mode, 0);
 }
 
@@ -1646,6 +1680,7 @@ static const struct inode_operations fuse_dir_inode_operations = {
        .link           = fuse_link,
        .setattr        = fuse_setattr,
        .create         = fuse_create,
+       .atomic_open    = fuse_atomic_open,
        .mknod          = fuse_mknod,
        .permission     = fuse_permission,
        .getattr        = fuse_getattr,