nfsd: recovery - make rec_file per net
Opening and closing of this file is done in client tracking init and exit operations. Client tracking is done in network namespace context already. So let's make this file opened and closed per network context - this will simlify it's management. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Stanislav Kinsbursky
J. Bruce Fields
Родитель
f252bc6806
Коммит
3a0733692f
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@ -84,6 +84,8 @@ struct nfsd_net {
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/* client_lock protects the client lru list and session hash table */
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spinlock_t client_lock;
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struct file *rec_file;
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};
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extern int nfsd_net_id;
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@ -62,7 +62,6 @@ struct nfsd4_client_tracking_ops {
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};
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/* Globals */
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static struct file *rec_file;
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static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery";
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static struct nfsd4_client_tracking_ops *client_tracking_ops;
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static bool in_grace;
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@ -182,7 +181,7 @@ nfsd4_create_clid_dir(struct nfs4_client *clp)
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if (test_and_set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
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return;
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if (!rec_file)
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if (!nn->rec_file)
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return;
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status = nfs4_make_rec_clidname(dname, &clp->cl_name);
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@ -193,11 +192,11 @@ nfsd4_create_clid_dir(struct nfs4_client *clp)
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if (status < 0)
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return;
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status = mnt_want_write_file(rec_file);
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status = mnt_want_write_file(nn->rec_file);
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if (status)
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return;
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dir = rec_file->f_path.dentry;
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dir = nn->rec_file->f_path.dentry;
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/* lock the parent */
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mutex_lock(&dir->d_inode->i_mutex);
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@ -227,14 +226,14 @@ out_unlock:
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if (crp)
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crp->cr_clp = clp;
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}
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vfs_fsync(rec_file, 0);
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vfs_fsync(nn->rec_file, 0);
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} else {
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printk(KERN_ERR "NFSD: failed to write recovery record"
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" (err %d); please check that %s exists"
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" and is writeable", status,
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user_recovery_dirname);
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}
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mnt_drop_write_file(rec_file);
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mnt_drop_write_file(nn->rec_file);
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nfs4_reset_creds(original_cred);
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}
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@ -267,7 +266,7 @@ static int
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nfsd4_list_rec_dir(recdir_func *f, struct nfsd_net *nn)
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{
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const struct cred *original_cred;
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struct dentry *dir = rec_file->f_path.dentry;
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struct dentry *dir = nn->rec_file->f_path.dentry;
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LIST_HEAD(names);
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int status;
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@ -275,13 +274,13 @@ nfsd4_list_rec_dir(recdir_func *f, struct nfsd_net *nn)
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if (status < 0)
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return status;
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status = vfs_llseek(rec_file, 0, SEEK_SET);
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status = vfs_llseek(nn->rec_file, 0, SEEK_SET);
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if (status < 0) {
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nfs4_reset_creds(original_cred);
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return status;
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}
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status = vfs_readdir(rec_file, nfsd4_build_namelist, &names);
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status = vfs_readdir(nn->rec_file, nfsd4_build_namelist, &names);
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mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
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while (!list_empty(&names)) {
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struct name_list *entry;
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@ -305,14 +304,14 @@ nfsd4_list_rec_dir(recdir_func *f, struct nfsd_net *nn)
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}
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static int
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nfsd4_unlink_clid_dir(char *name, int namlen)
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nfsd4_unlink_clid_dir(char *name, int namlen, struct nfsd_net *nn)
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{
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struct dentry *dir, *dentry;
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int status;
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dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name);
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dir = rec_file->f_path.dentry;
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dir = nn->rec_file->f_path.dentry;
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mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
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dentry = lookup_one_len(name, dir, namlen);
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if (IS_ERR(dentry)) {
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@ -339,14 +338,14 @@ nfsd4_remove_clid_dir(struct nfs4_client *clp)
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int status;
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struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
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if (!rec_file || !test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
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if (!nn->rec_file || !test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
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return;
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status = nfs4_make_rec_clidname(dname, &clp->cl_name);
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if (status)
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return legacy_recdir_name_error(status);
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status = mnt_want_write_file(rec_file);
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status = mnt_want_write_file(nn->rec_file);
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if (status)
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goto out;
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clear_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags);
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@ -355,10 +354,10 @@ nfsd4_remove_clid_dir(struct nfs4_client *clp)
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if (status < 0)
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goto out_drop_write;
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status = nfsd4_unlink_clid_dir(dname, HEXDIR_LEN-1);
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status = nfsd4_unlink_clid_dir(dname, HEXDIR_LEN-1, nn);
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nfs4_reset_creds(original_cred);
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if (status == 0) {
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vfs_fsync(rec_file, 0);
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vfs_fsync(nn->rec_file, 0);
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if (in_grace) {
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/* remove reclaim record */
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crp = nfsd4_find_reclaim_client(dname, nn);
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@ -367,7 +366,7 @@ nfsd4_remove_clid_dir(struct nfs4_client *clp)
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}
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}
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out_drop_write:
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mnt_drop_write_file(rec_file);
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mnt_drop_write_file(nn->rec_file);
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out:
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if (status)
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printk("NFSD: Failed to remove expired client state directory"
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@ -396,20 +395,20 @@ nfsd4_recdir_purge_old(struct nfsd_net *nn, time_t boot_time)
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int status;
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in_grace = false;
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if (!rec_file)
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if (!nn->rec_file)
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return;
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status = mnt_want_write_file(rec_file);
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status = mnt_want_write_file(nn->rec_file);
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if (status)
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goto out;
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status = nfsd4_list_rec_dir(purge_old, nn);
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if (status == 0)
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vfs_fsync(rec_file, 0);
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mnt_drop_write_file(rec_file);
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vfs_fsync(nn->rec_file, 0);
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mnt_drop_write_file(nn->rec_file);
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out:
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nfs4_release_reclaim(nn);
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if (status)
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printk("nfsd4: failed to purge old clients from recovery"
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" directory %s\n", rec_file->f_path.dentry->d_name.name);
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" directory %s\n", nn->rec_file->f_path.dentry->d_name.name);
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}
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static int
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@ -430,13 +429,13 @@ nfsd4_recdir_load(struct net *net) {
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int status;
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struct nfsd_net *nn = net_generic(net, nfsd_net_id);
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if (!rec_file)
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if (!nn->rec_file)
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return 0;
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status = nfsd4_list_rec_dir(load_recdir, nn);
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if (status)
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printk("nfsd4: failed loading clients from recovery"
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" directory %s\n", rec_file->f_path.dentry->d_name.name);
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" directory %s\n", nn->rec_file->f_path.dentry->d_name.name);
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return status;
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}
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@ -445,15 +444,16 @@ nfsd4_recdir_load(struct net *net) {
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*/
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static int
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nfsd4_init_recdir(void)
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nfsd4_init_recdir(struct net *net)
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{
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struct nfsd_net *nn = net_generic(net, nfsd_net_id);
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const struct cred *original_cred;
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int status;
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printk("NFSD: Using %s as the NFSv4 state recovery directory\n",
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user_recovery_dirname);
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BUG_ON(rec_file);
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BUG_ON(nn->rec_file);
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status = nfs4_save_creds(&original_cred);
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if (status < 0) {
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@ -463,12 +463,12 @@ nfsd4_init_recdir(void)
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return status;
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}
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rec_file = filp_open(user_recovery_dirname, O_RDONLY | O_DIRECTORY, 0);
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if (IS_ERR(rec_file)) {
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nn->rec_file = filp_open(user_recovery_dirname, O_RDONLY | O_DIRECTORY, 0);
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if (IS_ERR(nn->rec_file)) {
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printk("NFSD: unable to find recovery directory %s\n",
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user_recovery_dirname);
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status = PTR_ERR(rec_file);
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rec_file = NULL;
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status = PTR_ERR(nn->rec_file);
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nn->rec_file = NULL;
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}
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nfs4_reset_creds(original_cred);
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@ -509,7 +509,7 @@ nfsd4_load_reboot_recovery_data(struct net *net)
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{
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int status;
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status = nfsd4_init_recdir();
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status = nfsd4_init_recdir(net);
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if (!status)
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status = nfsd4_recdir_load(net);
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if (status)
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@ -544,12 +544,12 @@ err:
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}
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static void
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nfsd4_shutdown_recdir(void)
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nfsd4_shutdown_recdir(struct nfsd_net *nn)
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{
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if (!rec_file)
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if (!nn->rec_file)
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return;
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fput(rec_file);
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rec_file = NULL;
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fput(nn->rec_file);
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nn->rec_file = NULL;
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}
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static void
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@ -558,7 +558,7 @@ nfsd4_legacy_tracking_exit(struct net *net)
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struct nfsd_net *nn = net_generic(net, nfsd_net_id);
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nfs4_release_reclaim(nn);
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nfsd4_shutdown_recdir();
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nfsd4_shutdown_recdir(nn);
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nfs4_legacy_state_shutdown(net);
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}
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