shaba/lvm2
1
0
Fork 0
mirror of git://sourceware.org/git/lvm2.git synced 2024-12-23 21:35:29 +03:00
Code Releases Activity

o Work in progress, please ignore these files for a day or two whilst I

Browse Source 
get everything going.
This commit is contained in:
steve 2001-09-17 15:42:59 +00:00
parent f1571e2d46
commit 9de53d4b59
2 changed files with 229 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

86
driver/device-mapper/dmfs-dir.c Normal file
View File

@ -0,0 +1,86 @@
/*
* dmfs-dir.c
*
* Copyright (C) 2001 Sistina Software
*
* This software 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, or (at
* your option) any later version.
*
* This software 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.
*
* You should have received a copy of the GNU General Public License
* along with GNU CC; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Heavily based upon ramfs */
static int dmfs_create(struct inode *dir, struct dentry *dentry, int mode)
{
return dmfs_create_file(dir, dentry, mode);
}
static int dmfs_unlink(struct inode *dir, struct dentry *dentry)
{
}
static struct dentry *dmfs_lookup(struct inode *dir, struct dentry *dentry)
{
d_add(dentry, NULL);
return NULL;
}
static int dmfs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
if (old_dir != new_dir)
return -EPERM;
return 0;
}
static int dmfs_dir_sync(struct file *file, struct dentry *dentry, int datasync)
{
return 0;
}
static struct dm_dir_file_operations = {
read: generic_read_dir,
readdir: dcache_readdir,
fsync: dmfs_dir_sync,
};
static struct dm_root_inode_operations = {
create: dmfs_dir_create,
lookup: dmfs_dir_lookup,
unlink: dmfs_dir_unlink,
rename: dmfs_dir_rename,
};
struct inode *dmfs_create_dir(struct inode *dir, struct dentry *dentry, int mode)
{
struct inode *inode = new_inode(sb);
if (inode) {
inode->i_mode = mode | S_IFDIR;
inode->i_uid = current->fsuid;
inode->i_gid = current->fsgid;
inode->i_blksize = PAGE_CACHE_SIZE;
inode->i_blocks = 0;
inode->i_rdev = NODEV;
inode->i_atime = inode->i_ctime = inode->i_ctime = CURRENT_TIME;
inode->i_fop = &dmfs_dir_file_operations;
inode->i_op = &dmfs_dir_dir_operations;
}
return inode;
}

143
driver/device-mapper/dmfs-root.c Normal file
View File

@ -0,0 +1,143 @@
/*
* dmfs-root.c
*
* Copyright (C) 2001 Sistina Software
*
* This software 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, or (at
* your option) any later version.
*
* This software 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.
*
* You should have received a copy of the GNU General Public License
* along with GNU CC; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Heavily based upon ramfs */
static int is_identifier(const char *str, int len)
{
while(len--) {
if (!isalnum(*str) && *str != '_')
return 0;
str++;
}
return 1;
}
static int dmfs_root_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
struct super_block *sb = dir->i_sb;
int rv;
if (!is_identifier(name, dentry->d_name.len))
return -EPERM;
rv = dmfs_create_dir(dir, dentry, mode);
if (rv == 0) {
rv = dm_create(name, -1);
}
return rv;
}
static inline positive(struct dentry *dentry)
{
return dentry->d_inode && ! d_unhashed(dentry);
}
static int empty(struct dentry *dentry)
{
struct list_head *list;
spin_lock(&dcache_lock);
list = dentry->d_subdirs.next;
while(list != &dentry->d_subdirs) {
struct dentry *de = list_entry(list, struct dentry, d_child);
if (positive(de)) {
spin_unlock(&dcache_lock);
return 0;
}
list = list->next;
}
spin_unlock(&dcache_lock);
return 1;
}
static int dmfs_root_rmdir(struct inode *dir, struct dentry *dentry)
{
int ret = -ENOTEMPTY;
if (empty(dentry)) {
struct inode *inode = dentry->d_inode;
inode->i_nlink--;
dm_remove(dentry->d_name.name);
dput(dentry);
}
return retval;
}
static struct dentry *dmfs_root_lookup(struct inode *dir, struct dentry *dentry)
{
d_add(dentry, NULL);
return NULL;
}
static int dmfs_root_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
/* Can only rename - not move between directories! */
if (old_dir != new_dir)
return -EPERM;
return -EINVAL; /* FIXME: so a change of LV name here */
}
static int dmfs_root_sync(struct file *file, struct dentry *dentry, int datasync)
{
return 0;
}
static struct dm_root_file_operations = {
read: generic_read_dir,
readdir: dcache_readdir,
fsync: dmfs_root_sync,
};
static struct dm_root_inode_operations = {
lookup: dmfs_root_lookup,
mkdir: dmfs_root_mkdir,
rmdir: dmfs_root_rmdir,
rename: dmfs_root_rename,
};
struct inode *dmfs_create_root(struct super_block *sb, int mode)
{
struct inode *inode = new_inode(sb);
if (inode) {
inode->i_mode = mode | S_IFDIR;
inode->i_uid = current->fsuid;
inode->i_gid = current->fsgid;
inode->i_blksize = PAGE_CACHE_SIZE;
inode->i_blocks = 0;
inode->i_rdev = NODEV;
inode->i_atime = inode->i_ctime = inode->i_ctime = CURRENT_TIME;
inode->i_fop = &dmfs_root_file_operations;
inode->i_op = &dmfs_root_dir_operations;
}
return inode;
}