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o More fs fiddling. Another check point commit.

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This commit is contained in:
steve 2001-09-19 10:32:51 +00:00
parent 0a91d145ba
commit 6a57fa079e
3 changed files with 40 additions and 1 deletions
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25
driver/device-mapper/dmfs-lv.c
View File

@ -21,6 +21,29 @@
/* Heavily based upon ramfs */
#include <linux/config.h>
#include <linux/fs.h>
static int dmfs_lv_create(struct inode *dir, struct dentry *dentry, int mode)
{
struct inode *inode;
if (dentry->d_name.name[0] == '.')
return -EPERM;
if (dentry->d_name.len == 6 &&
memcmp(dentry->d_name.name, "ACTIVE", 6) == 0)
return -EPERM;
inode = dmfs_create_table(dir, dentry, mode)
if (!IS_ERR(inode)) {
d_instantiate(dentry, inode);
dget(dentry);
return 0;
}
return PTR_ERR(inode);
}
static int dmfs_lv_unlink(struct inode *dir, struct dentry *dentry)
{
@ -69,7 +92,7 @@ static struct dmfs_lv_file_operations = {
};
static struct dmfs_lv_inode_operations = {
create: dmfs_create_file,
create: dmfs_lv_create,
lookup: dmfs_lv_lookup,
link: dmfs_lv_link,
unlink: dmfs_lv_unlink,

7
driver/device-mapper/dmfs-root.c
View File

@ -89,6 +89,13 @@ static int dmfs_root_rmdir(struct inode *dir, struct dentry *dentry)
{
int ret = -ENOTEMPTY;
/*
* FIXME: Checks need to be more complicated than this...
* Need to take into account removing "virtual" files but must
* not allow removal whilst tables are still existing. Also we
* should check for the block device being closed.
*/
if (empty(dentry)) {
struct inode *inode = dentry->d_inode;

9
driver/device-mapper/dmfs-table.c
View File

@ -24,16 +24,25 @@
static ssize_t dmfs_table_read(struct file *file, char *buf, size_t size, loff_t *pos)
{
down(&inode->i_sem);
up(&inode->i_sem);
}
static ssize_t dmfs_table_write(struct file *file, const char *buf, size_t size, loff_t *pos)
{
down(&inode->i_sem);
up(&inode->i_sem);
}
static int dmfs_table_open(struct inode *inode, struct file *file)
{
struct dentry *dentry = file->f_dentry;
if (dentry->name[0] == '.')
return -EPERM;
if (dentry->name.len == 6 && memcmp("ACTIVE", dentry->name.name, 6) == 0)
return -EPERM;