diff options
Diffstat (limited to 'drivers/staging/pohmelfs/lock.c')
| -rw-r--r-- | drivers/staging/pohmelfs/lock.c | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/drivers/staging/pohmelfs/lock.c b/drivers/staging/pohmelfs/lock.c deleted file mode 100644 index 6710114cd425..000000000000 --- a/drivers/staging/pohmelfs/lock.c +++ /dev/null @@ -1,182 +0,0 @@ -/* - * 2007+ Copyright (c) Evgeniy Polyakov <zbr@ioremap.net> - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <linux/module.h> -#include <linux/backing-dev.h> -#include <linux/fs.h> -#include <linux/fsnotify.h> -#include <linux/mempool.h> - -#include "netfs.h" - -static int pohmelfs_send_lock_trans(struct pohmelfs_inode *pi, - u64 id, u64 start, u32 size, int type) -{ - struct inode *inode = &pi->vfs_inode; - struct pohmelfs_sb *psb = POHMELFS_SB(inode->i_sb); - struct netfs_trans *t; - struct netfs_cmd *cmd; - int path_len, err; - void *data; - struct netfs_lock *l; - int isize = (type & POHMELFS_LOCK_GRAB) ? 0 : sizeof(struct netfs_inode_info); - - err = pohmelfs_path_length(pi); - if (err < 0) - goto err_out_exit; - - path_len = err; - - err = -ENOMEM; - t = netfs_trans_alloc(psb, path_len + sizeof(struct netfs_lock) + isize, - NETFS_TRANS_SINGLE_DST, 0); - if (!t) - goto err_out_exit; - - cmd = netfs_trans_current(t); - data = cmd + 1; - - err = pohmelfs_construct_path_string(pi, data, path_len); - if (err < 0) - goto err_out_free; - path_len = err; - - l = data + path_len; - - l->start = start; - l->size = size; - l->type = type; - l->ino = pi->ino; - - cmd->cmd = NETFS_LOCK; - cmd->start = 0; - cmd->id = id; - cmd->size = sizeof(struct netfs_lock) + path_len + isize; - cmd->ext = path_len; - cmd->csize = 0; - - netfs_convert_cmd(cmd); - netfs_convert_lock(l); - - if (isize) { - struct netfs_inode_info *info = (struct netfs_inode_info *)(l + 1); - - info->mode = inode->i_mode; - info->nlink = inode->i_nlink; - info->uid = inode->i_uid; - info->gid = inode->i_gid; - info->blocks = inode->i_blocks; - info->rdev = inode->i_rdev; - info->size = inode->i_size; - info->version = inode->i_version; - - netfs_convert_inode_info(info); - } - - netfs_trans_update(cmd, t, path_len + sizeof(struct netfs_lock) + isize); - - return netfs_trans_finish(t, psb); - -err_out_free: - netfs_trans_free(t); -err_out_exit: - printk("%s: err: %d.\n", __func__, err); - return err; -} - -int pohmelfs_data_lock(struct pohmelfs_inode *pi, u64 start, u32 size, int type) -{ - struct pohmelfs_sb *psb = POHMELFS_SB(pi->vfs_inode.i_sb); - struct pohmelfs_mcache *m; - int err = -ENOMEM; - struct iattr iattr; - struct inode *inode = &pi->vfs_inode; - - dprintk("%s: %p: ino: %llu, start: %llu, size: %u, " - "type: %d, locked as: %d, owned: %d.\n", - __func__, &pi->vfs_inode, pi->ino, - start, size, type, pi->lock_type, - !!test_bit(NETFS_INODE_OWNED, &pi->state)); - - if (!pohmelfs_need_lock(pi, type)) - return 0; - - m = pohmelfs_mcache_alloc(psb, start, size, NULL); - if (IS_ERR(m)) - return PTR_ERR(m); - - err = pohmelfs_send_lock_trans(pi, m->gen, start, size, - type | POHMELFS_LOCK_GRAB); - if (err) - goto err_out_put; - - err = wait_for_completion_timeout(&m->complete, psb->mcache_timeout); - if (err) - err = m->err; - else - err = -ETIMEDOUT; - - if (err) { - printk("%s: %p: ino: %llu, mgen: %llu, start: %llu, size: %u, err: %d.\n", - __func__, &pi->vfs_inode, pi->ino, m->gen, start, size, err); - } - - if (err && (err != -ENOENT)) - goto err_out_put; - - if (!err) { - netfs_convert_inode_info(&m->info); - - iattr.ia_valid = ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_SIZE | ATTR_ATIME; - iattr.ia_mode = m->info.mode; - iattr.ia_uid = m->info.uid; - iattr.ia_gid = m->info.gid; - iattr.ia_size = m->info.size; - iattr.ia_atime = CURRENT_TIME; - - dprintk("%s: %p: ino: %llu, mgen: %llu, start: %llu, isize: %llu -> %llu.\n", - __func__, &pi->vfs_inode, pi->ino, m->gen, start, inode->i_size, m->info.size); - - err = pohmelfs_setattr_raw(inode, &iattr); - if (!err) { - struct dentry *dentry = d_find_alias(inode); - if (dentry) { - fsnotify_change(dentry, iattr.ia_valid); - dput(dentry); - } - } - } - - pi->lock_type = type; - set_bit(NETFS_INODE_OWNED, &pi->state); - - pohmelfs_mcache_put(psb, m); - - return 0; - -err_out_put: - pohmelfs_mcache_put(psb, m); - return err; -} - -int pohmelfs_data_unlock(struct pohmelfs_inode *pi, u64 start, u32 size, int type) -{ - dprintk("%s: %p: ino: %llu, start: %llu, size: %u, type: %d.\n", - __func__, &pi->vfs_inode, pi->ino, start, size, type); - pi->lock_type = 0; - clear_bit(NETFS_INODE_REMOTE_DIR_SYNCED, &pi->state); - clear_bit(NETFS_INODE_OWNED, &pi->state); - return pohmelfs_send_lock_trans(pi, pi->ino, start, size, type); -} |