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-rw-r--r--fs/autofs4/inode.c375
1 files changed, 0 insertions, 375 deletions
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
deleted file mode 100644
index 6262819ede45..000000000000
--- a/fs/autofs4/inode.c
+++ /dev/null
@@ -1,375 +0,0 @@
-/*
- * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
- * Copyright 2005-2006 Ian Kent <raven@themaw.net>
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/file.h>
-#include <linux/seq_file.h>
-#include <linux/pagemap.h>
-#include <linux/parser.h>
-#include <linux/bitops.h>
-#include <linux/magic.h>
-#include "autofs_i.h"
-#include <linux/module.h>
-
-struct autofs_info *autofs_new_ino(struct autofs_sb_info *sbi)
-{
- struct autofs_info *ino;
-
- ino = kzalloc(sizeof(*ino), GFP_KERNEL);
- if (ino) {
- INIT_LIST_HEAD(&ino->active);
- INIT_LIST_HEAD(&ino->expiring);
- ino->last_used = jiffies;
- ino->sbi = sbi;
- }
- return ino;
-}
-
-void autofs_clean_ino(struct autofs_info *ino)
-{
- ino->uid = GLOBAL_ROOT_UID;
- ino->gid = GLOBAL_ROOT_GID;
- ino->last_used = jiffies;
-}
-
-void autofs_free_ino(struct autofs_info *ino)
-{
- kfree(ino);
-}
-
-void autofs_kill_sb(struct super_block *sb)
-{
- struct autofs_sb_info *sbi = autofs_sbi(sb);
-
- /*
- * In the event of a failure in get_sb_nodev the superblock
- * info is not present so nothing else has been setup, so
- * just call kill_anon_super when we are called from
- * deactivate_super.
- */
- if (sbi) {
- /* Free wait queues, close pipe */
- autofs_catatonic_mode(sbi);
- put_pid(sbi->oz_pgrp);
- }
-
- pr_debug("shutting down\n");
- kill_litter_super(sb);
- if (sbi)
- kfree_rcu(sbi, rcu);
-}
-
-static int autofs_show_options(struct seq_file *m, struct dentry *root)
-{
- struct autofs_sb_info *sbi = autofs_sbi(root->d_sb);
- struct inode *root_inode = d_inode(root->d_sb->s_root);
-
- if (!sbi)
- return 0;
-
- seq_printf(m, ",fd=%d", sbi->pipefd);
- if (!uid_eq(root_inode->i_uid, GLOBAL_ROOT_UID))
- seq_printf(m, ",uid=%u",
- from_kuid_munged(&init_user_ns, root_inode->i_uid));
- if (!gid_eq(root_inode->i_gid, GLOBAL_ROOT_GID))
- seq_printf(m, ",gid=%u",
- from_kgid_munged(&init_user_ns, root_inode->i_gid));
- seq_printf(m, ",pgrp=%d", pid_vnr(sbi->oz_pgrp));
- seq_printf(m, ",timeout=%lu", sbi->exp_timeout/HZ);
- seq_printf(m, ",minproto=%d", sbi->min_proto);
- seq_printf(m, ",maxproto=%d", sbi->max_proto);
-
- if (autofs_type_offset(sbi->type))
- seq_printf(m, ",offset");
- else if (autofs_type_direct(sbi->type))
- seq_printf(m, ",direct");
- else
- seq_printf(m, ",indirect");
-#ifdef CONFIG_CHECKPOINT_RESTORE
- if (sbi->pipe)
- seq_printf(m, ",pipe_ino=%ld", file_inode(sbi->pipe)->i_ino);
- else
- seq_printf(m, ",pipe_ino=-1");
-#endif
- return 0;
-}
-
-static void autofs_evict_inode(struct inode *inode)
-{
- clear_inode(inode);
- kfree(inode->i_private);
-}
-
-static const struct super_operations autofs_sops = {
- .statfs = simple_statfs,
- .show_options = autofs_show_options,
- .evict_inode = autofs_evict_inode,
-};
-
-enum {Opt_err, Opt_fd, Opt_uid, Opt_gid, Opt_pgrp, Opt_minproto, Opt_maxproto,
- Opt_indirect, Opt_direct, Opt_offset};
-
-static const match_table_t tokens = {
- {Opt_fd, "fd=%u"},
- {Opt_uid, "uid=%u"},
- {Opt_gid, "gid=%u"},
- {Opt_pgrp, "pgrp=%u"},
- {Opt_minproto, "minproto=%u"},
- {Opt_maxproto, "maxproto=%u"},
- {Opt_indirect, "indirect"},
- {Opt_direct, "direct"},
- {Opt_offset, "offset"},
- {Opt_err, NULL}
-};
-
-static int parse_options(char *options, int *pipefd, kuid_t *uid, kgid_t *gid,
- int *pgrp, bool *pgrp_set, unsigned int *type,
- int *minproto, int *maxproto)
-{
- char *p;
- substring_t args[MAX_OPT_ARGS];
- int option;
-
- *uid = current_uid();
- *gid = current_gid();
-
- *minproto = AUTOFS_MIN_PROTO_VERSION;
- *maxproto = AUTOFS_MAX_PROTO_VERSION;
-
- *pipefd = -1;
-
- if (!options)
- return 1;
-
- while ((p = strsep(&options, ",")) != NULL) {
- int token;
-
- if (!*p)
- continue;
-
- token = match_token(p, tokens, args);
- switch (token) {
- case Opt_fd:
- if (match_int(args, pipefd))
- return 1;
- break;
- case Opt_uid:
- if (match_int(args, &option))
- return 1;
- *uid = make_kuid(current_user_ns(), option);
- if (!uid_valid(*uid))
- return 1;
- break;
- case Opt_gid:
- if (match_int(args, &option))
- return 1;
- *gid = make_kgid(current_user_ns(), option);
- if (!gid_valid(*gid))
- return 1;
- break;
- case Opt_pgrp:
- if (match_int(args, &option))
- return 1;
- *pgrp = option;
- *pgrp_set = true;
- break;
- case Opt_minproto:
- if (match_int(args, &option))
- return 1;
- *minproto = option;
- break;
- case Opt_maxproto:
- if (match_int(args, &option))
- return 1;
- *maxproto = option;
- break;
- case Opt_indirect:
- set_autofs_type_indirect(type);
- break;
- case Opt_direct:
- set_autofs_type_direct(type);
- break;
- case Opt_offset:
- set_autofs_type_offset(type);
- break;
- default:
- return 1;
- }
- }
- return (*pipefd < 0);
-}
-
-int autofs_fill_super(struct super_block *s, void *data, int silent)
-{
- struct inode *root_inode;
- struct dentry *root;
- struct file *pipe;
- int pipefd;
- struct autofs_sb_info *sbi;
- struct autofs_info *ino;
- int pgrp = 0;
- bool pgrp_set = false;
- int ret = -EINVAL;
-
- sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
- return -ENOMEM;
- pr_debug("starting up, sbi = %p\n", sbi);
-
- s->s_fs_info = sbi;
- sbi->magic = AUTOFS_SBI_MAGIC;
- sbi->pipefd = -1;
- sbi->pipe = NULL;
- sbi->catatonic = 1;
- sbi->exp_timeout = 0;
- sbi->oz_pgrp = NULL;
- sbi->sb = s;
- sbi->version = 0;
- sbi->sub_version = 0;
- set_autofs_type_indirect(&sbi->type);
- sbi->min_proto = 0;
- sbi->max_proto = 0;
- mutex_init(&sbi->wq_mutex);
- mutex_init(&sbi->pipe_mutex);
- spin_lock_init(&sbi->fs_lock);
- sbi->queues = NULL;
- spin_lock_init(&sbi->lookup_lock);
- INIT_LIST_HEAD(&sbi->active_list);
- INIT_LIST_HEAD(&sbi->expiring_list);
- s->s_blocksize = 1024;
- s->s_blocksize_bits = 10;
- s->s_magic = AUTOFS_SUPER_MAGIC;
- s->s_op = &autofs_sops;
- s->s_d_op = &autofs_dentry_operations;
- s->s_time_gran = 1;
-
- /*
- * Get the root inode and dentry, but defer checking for errors.
- */
- ino = autofs_new_ino(sbi);
- if (!ino) {
- ret = -ENOMEM;
- goto fail_free;
- }
- root_inode = autofs_get_inode(s, S_IFDIR | 0755);
- root = d_make_root(root_inode);
- if (!root)
- goto fail_ino;
- pipe = NULL;
-
- root->d_fsdata = ino;
-
- /* Can this call block? */
- if (parse_options(data, &pipefd, &root_inode->i_uid, &root_inode->i_gid,
- &pgrp, &pgrp_set, &sbi->type, &sbi->min_proto,
- &sbi->max_proto)) {
- pr_err("called with bogus options\n");
- goto fail_dput;
- }
-
- /* Test versions first */
- if (sbi->max_proto < AUTOFS_MIN_PROTO_VERSION ||
- sbi->min_proto > AUTOFS_MAX_PROTO_VERSION) {
- pr_err("kernel does not match daemon version "
- "daemon (%d, %d) kernel (%d, %d)\n",
- sbi->min_proto, sbi->max_proto,
- AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION);
- goto fail_dput;
- }
-
- /* Establish highest kernel protocol version */
- if (sbi->max_proto > AUTOFS_MAX_PROTO_VERSION)
- sbi->version = AUTOFS_MAX_PROTO_VERSION;
- else
- sbi->version = sbi->max_proto;
- sbi->sub_version = AUTOFS_PROTO_SUBVERSION;
-
- if (pgrp_set) {
- sbi->oz_pgrp = find_get_pid(pgrp);
- if (!sbi->oz_pgrp) {
- pr_err("could not find process group %d\n",
- pgrp);
- goto fail_dput;
- }
- } else {
- sbi->oz_pgrp = get_task_pid(current, PIDTYPE_PGID);
- }
-
- if (autofs_type_trigger(sbi->type))
- __managed_dentry_set_managed(root);
-
- root_inode->i_fop = &autofs_root_operations;
- root_inode->i_op = &autofs_dir_inode_operations;
-
- pr_debug("pipe fd = %d, pgrp = %u\n", pipefd, pid_nr(sbi->oz_pgrp));
- pipe = fget(pipefd);
-
- if (!pipe) {
- pr_err("could not open pipe file descriptor\n");
- goto fail_put_pid;
- }
- ret = autofs_prepare_pipe(pipe);
- if (ret < 0)
- goto fail_fput;
- sbi->pipe = pipe;
- sbi->pipefd = pipefd;
- sbi->catatonic = 0;
-
- /*
- * Success! Install the root dentry now to indicate completion.
- */
- s->s_root = root;
- return 0;
-
- /*
- * Failure ... clean up.
- */
-fail_fput:
- pr_err("pipe file descriptor does not contain proper ops\n");
- fput(pipe);
-fail_put_pid:
- put_pid(sbi->oz_pgrp);
-fail_dput:
- dput(root);
- goto fail_free;
-fail_ino:
- autofs_free_ino(ino);
-fail_free:
- kfree(sbi);
- s->s_fs_info = NULL;
- return ret;
-}
-
-struct inode *autofs_get_inode(struct super_block *sb, umode_t mode)
-{
- struct inode *inode = new_inode(sb);
-
- if (inode == NULL)
- return NULL;
-
- inode->i_mode = mode;
- if (sb->s_root) {
- inode->i_uid = d_inode(sb->s_root)->i_uid;
- inode->i_gid = d_inode(sb->s_root)->i_gid;
- }
- inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
- inode->i_ino = get_next_ino();
-
- if (S_ISDIR(mode)) {
- set_nlink(inode, 2);
- inode->i_op = &autofs_dir_inode_operations;
- inode->i_fop = &autofs_dir_operations;
- } else if (S_ISLNK(mode)) {
- inode->i_op = &autofs_symlink_inode_operations;
- } else
- WARN_ON(1);
-
- return inode;
-}