void nfsd4_remove_clid_dir(struct nfs4_client *clp) { uid_t uid; gid_t gid; int status; if (!rec_dir_init || !clp->cl_firststate) return; status = mnt_want_write(rec_dir.path.mnt); if (status) goto out; clp->cl_firststate = 0; nfs4_save_user(&uid, &gid); status = nfsd4_unlink_clid_dir(clp->cl_recdir, HEXDIR_LEN-1); nfs4_reset_user(uid, gid); if (status == 0) nfsd4_sync_rec_dir(); mnt_drop_write(rec_dir.path.mnt); out: if (status) printk("NFSD: Failed to remove expired client state directory" " %.*s\n", HEXDIR_LEN, clp->cl_recdir); return; }
int nfsd4_create_clid_dir(struct nfs4_client *clp) { char *dname = clp->cl_recdir; struct dentry *dentry; uid_t uid; gid_t gid; int status; dprintk("NFSD: nfsd4_create_clid_dir for \"%s\"\n", dname); if (!rec_dir_init || clp->cl_firststate) return 0; nfs4_save_user(&uid, &gid); /* lock the parent */ mutex_lock(&rec_dir.path.dentry->d_inode->i_mutex); dentry = lookup_one_len(dname, rec_dir.path.dentry, HEXDIR_LEN-1); if (IS_ERR(dentry)) { status = PTR_ERR(dentry); goto out_unlock; } status = -EEXIST; if (dentry->d_inode) { dprintk("NFSD: nfsd4_create_clid_dir: DIRECTORY EXISTS\n"); goto out_put; } status = mnt_want_write(rec_dir.path.mnt); if (status) goto out_put; status = vfs_mkdir(rec_dir.path.dentry->d_inode, dentry, S_IRWXU); mnt_drop_write(rec_dir.path.mnt); out_put: dput(dentry); out_unlock: mutex_unlock(&rec_dir.path.dentry->d_inode->i_mutex); if (status == 0) { clp->cl_firststate = 1; nfsd4_sync_rec_dir(); } nfs4_reset_user(uid, gid); dprintk("NFSD: nfsd4_create_clid_dir returns %d\n", status); return status; }
static int nfsd4_list_rec_dir(struct dentry *dir, recdir_func *f) { struct file *filp; struct dentry_list_arg dla = { .parent = dir, }; struct list_head *dentries = &dla.dentries; struct dentry_list *child; uid_t uid; gid_t gid; int status; if (!rec_dir_init) return 0; nfs4_save_user(&uid, &gid); filp = dentry_open(dget(dir), mntget(rec_dir.mnt), O_RDONLY); status = PTR_ERR(filp); if (IS_ERR(filp)) goto out; INIT_LIST_HEAD(dentries); status = vfs_readdir(filp, nfsd4_build_dentrylist, &dla); fput(filp); while (!list_empty(dentries)) { child = list_entry(dentries->next, struct dentry_list, list); status = f(dir, child->dentry); if (status) goto out; list_del(&child->list); dput(child->dentry); kfree(child); } out: while (!list_empty(dentries)) { child = list_entry(dentries->next, struct dentry_list, list); list_del(&child->list); dput(child->dentry); kfree(child); } nfs4_reset_user(uid, gid); return status; }
void nfsd4_init_recdir(char *rec_dirname) { uid_t uid = 0; gid_t gid = 0; int status; printk("NFSD: Using %s as the NFSv4 state recovery directory\n", rec_dirname); BUG_ON(rec_dir_init); nfs4_save_user(&uid, &gid); status = path_lookup(rec_dirname, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &rec_dir); if (status) printk("NFSD: unable to find recovery directory %s\n", rec_dirname); if (!status) rec_dir_init = 1; nfs4_reset_user(uid, gid); }