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;
int minproto, maxproto;
pid_t pgid;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
goto fail_unlock;
DPRINTK(("autofs: starting up, sbi = %p\n",sbi));
s->s_fs_info = sbi;
sbi->magic = AUTOFS_SBI_MAGIC;
sbi->pipe = NULL;
sbi->catatonic = 1;
sbi->exp_timeout = 0;
autofs_initialize_hash(&sbi->dirhash);
sbi->queues = NULL;
memset(sbi->symlink_bitmap, 0, sizeof(long)*AUTOFS_SYMLINK_BITMAP_LEN);
sbi->next_dir_ino = AUTOFS_FIRST_DIR_INO;
s->s_blocksize = 1024;
s->s_blocksize_bits = 10;
s->s_magic = AUTOFS_SUPER_MAGIC;
s->s_op = &autofs_sops;
s->s_time_gran = 1;
sbi->sb = s;
root_inode = iget(s, AUTOFS_ROOT_INO);
root = d_alloc_root(root_inode);
pipe = NULL;
if (!root)
goto fail_iput;
/* Can this call block? - WTF cares? s is locked. */
if (parse_options(data, &pipefd, &root_inode->i_uid,
&root_inode->i_gid, &pgid, &minproto,
&maxproto)) {
printk("autofs: called with bogus options\n");
goto fail_dput;
}
/* Couldn't this be tested earlier? */
if (minproto > AUTOFS_PROTO_VERSION ||
maxproto < AUTOFS_PROTO_VERSION) {
printk("autofs: kernel does not match daemon version\n");
goto fail_dput;
}
DPRINTK(("autofs: pipe fd = %d, pgrp = %u\n", pipefd, pgid));
sbi->oz_pgrp = find_get_pid(pgid);
if (!sbi->oz_pgrp) {
printk("autofs: could not find process group %d\n", pgid);
goto fail_dput;
}
pipe = fget(pipefd);
if (!pipe) {
printk("autofs: could not open pipe file descriptor\n");
goto fail_put_pid;
}
if (!pipe->f_op || !pipe->f_op->write)
goto fail_fput;
sbi->pipe = pipe;
sbi->catatonic = 0;
/*
* Success! Install the root dentry now to indicate completion.
*/
s->s_root = root;
return 0;
fail_fput:
printk("autofs: 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_iput:
printk("autofs: get root dentry failed\n");
iput(root_inode);
fail_free:
kfree(sbi);
s->s_fs_info = NULL;
fail_unlock:
return -EINVAL;
}
struct super_block *autofs_read_super(struct super_block *s, void *data,
int silent)
{
int pipefd;
struct autofs_sb_info *sbi;
int minproto, maxproto;
MOD_INC_USE_COUNT;
lock_super(s);
sbi = (struct autofs_sb_info *) kmalloc(sizeof(struct autofs_sb_info), GFP_KERNEL);
if ( !sbi ) {
s->s_dev = 0;
MOD_DEC_USE_COUNT;
return NULL;
}
DPRINTK(("autofs: starting up, sbi = %p\n",sbi));
s->u.generic_sbp = sbi;
sbi->magic = AUTOFS_SBI_MAGIC;
sbi->catatonic = 0;
sbi->exp_timeout = 0;
sbi->oz_pgrp = current->pgrp;
autofs_initialize_hash(&sbi->dirhash);
sbi->queues = NULL;
memset(sbi->symlink_bitmap, 0, sizeof(u32)*AUTOFS_SYMLINK_BITMAP_LEN);
sbi->next_dir_ino = AUTOFS_FIRST_DIR_INO;
s->s_blocksize = 1024;
s->s_blocksize_bits = 10;
s->s_magic = AUTOFS_SUPER_MAGIC;
s->s_op = &autofs_sops;
unlock_super(s);
if (!(s->s_mounted = iget(s, AUTOFS_ROOT_INO))) {
s->s_dev = 0;
kfree(sbi);
printk("autofs: get root inode failed\n");
MOD_DEC_USE_COUNT;
return NULL;
}
if ( parse_options(data,&pipefd,&s->s_mounted->i_uid,&s->s_mounted->i_gid,&sbi->oz_pgrp,&minproto,&maxproto) ) {
iput(s->s_mounted);
s->s_dev = 0;
kfree(sbi);
printk("autofs: called with bogus options\n");
MOD_DEC_USE_COUNT;
return NULL;
}
if ( minproto > AUTOFS_PROTO_VERSION || maxproto < AUTOFS_PROTO_VERSION ) {
iput(s->s_mounted);
s->s_dev = 0;
kfree(sbi);
printk("autofs: kernel does not match daemon version\n");
MOD_DEC_USE_COUNT;
return NULL;
}
DPRINTK(("autofs: pipe fd = %d, pgrp = %u\n", pipefd, sbi->oz_pgrp));
sbi->pipe = fget(pipefd);
if ( !sbi->pipe || !sbi->pipe->f_op || !sbi->pipe->f_op->write ) {
if ( sbi->pipe ) {
fput(sbi->pipe, sbi->pipe->f_inode);
printk("autofs: pipe file descriptor does not contain proper ops\n");
} else {
printk("autofs: could not open pipe file descriptor\n");
}
iput(s->s_mounted);
s->s_dev = 0;
kfree(sbi);
MOD_DEC_USE_COUNT;
return NULL;
}
return s;
}
