mirror of
git://sourceware.org/git/lvm2.git
synced 2025-02-28 05:57:49 +03:00
Well when things start looking so complicated that future direction becomes
non-obvious, its time to simplify :-) o Moving towards a simpler and more obviously correct interface o Removed some fs operations in directories representing volumes o Changed some file names o Made things cleaner more changes to follow...
This commit is contained in:
steve
parent
157159e487
commit
02f571f081
@ -1,73 +0,0 @@
|
||||
/*
|
||||
* dmfs-active.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.
|
||||
*/
|
||||
|
||||
#include <linux/config.h>
|
||||
#include <linux/fs.h>
|
||||
|
||||
static ssize_t dmfs_active_read(struct file *file, char *buf, size_t size, loff_t *pos)
|
||||
{
|
||||
down(&inode->i_sem);
|
||||
|
||||
up(&inode->i_sem);
|
||||
}
|
||||
|
||||
static ssize_t dmfs_active_write(struct file *file, const char *buf, size_t size, loff_t *pos)
|
||||
{
|
||||
down(&inode->i_sem);
|
||||
|
||||
up(&inode->i_sem);
|
||||
}
|
||||
|
||||
static int dmfs_active_sync(struct file *file, struct dentry *dentry, int datasync)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct dm_table_file_operations = {
|
||||
/* llseek: generic_file_llseek, */
|
||||
read: dmfs_active_read,
|
||||
write: dmfs_active_write,
|
||||
open: dmfs_active_open,
|
||||
fsync: dmfs_active_sync,
|
||||
};
|
||||
|
||||
static struct dmfs_active_inode_operations = {
|
||||
};
|
||||
|
||||
int dmfs_create_active(struct inode *dir, int mode)
|
||||
{
|
||||
struct inode *inode = new_inode(dir->i_sb);
|
||||
|
||||
if (inode) {
|
||||
inode->i_mode = mode | S_IFREG;
|
||||
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_mtime = CURRENT_TIME;
|
||||
inode->i_fop = &dmfs_active_file_operations;
|
||||
inode->i_op = &dmfs_active_inode_operations;
|
||||
}
|
||||
|
||||
return inode;
|
||||
}
|
||||
|
||||
@ -24,32 +24,6 @@
|
||||
#include <linux/config.h>
|
||||
#include <linux/fs.h>
|
||||
|
||||
static int dmfs_lv_create(struct inode *dir, struct dentry *dentry, int mode)
|
||||
{
|
||||
struct inode *inode;
|
||||
struct dm_table *table;
|
||||
|
||||
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)) {
|
||||
table = dm_table_create();
|
||||
if (table) {
|
||||
d_instantiate(dentry, inode);
|
||||
dget(dentry);
|
||||
return 0;
|
||||
}
|
||||
iput(inode);
|
||||
return -ENOMEM;
|
||||
}
|
||||
return PTR_ERR(inode);
|
||||
}
|
||||
|
||||
static int dmfs_lv_unlink(struct inode *dir, struct dentry *dentry)
|
||||
{
|
||||
inode->i_nlink--;
|
||||
@ -57,72 +31,26 @@ static int dmfs_lv_unlink(struct inode *dir, struct dentry *dentry)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int dmfs_lv_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
|
||||
{
|
||||
struct inode *inode = old_dentry->d_inode;
|
||||
|
||||
if (!S_ISREG(inode->i_mode))
|
||||
return -EPERM;
|
||||
|
||||
if (dentry->d_parent != old_dentry->d_parent)
|
||||
return -EPERM;
|
||||
|
||||
if (dentry->d_name[0] == '.')
|
||||
return -EPERM;
|
||||
|
||||
if (old_dentry->d_name[0] == '.')
|
||||
return -EPERM;
|
||||
|
||||
inode->i_nlink++;
|
||||
atomic_inc(&inode->i_count);
|
||||
dget(dentry);
|
||||
d_instantiate(dentry, inode);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct dentry *dmfs_lv_lookup(struct inode *dir, struct dentry *dentry)
|
||||
{
|
||||
struct inode *inode = NULL;
|
||||
char *name = dentry->d_name.name;
|
||||
|
||||
if (dentry->d_name[0] == '.') {
|
||||
char *name = dentry->d_name.name;
|
||||
switch(dentry->d_name.len) {
|
||||
case 7:
|
||||
if (memcmp(".active", name, 7) == 0)
|
||||
inode = dmfs_create_active(dir, 0600);
|
||||
break;
|
||||
case 11:
|
||||
if (memcmp(".suspend_IO", name, 11) == 0)
|
||||
inode = dmfs_create_suspend(dir, 0600);
|
||||
break;
|
||||
}
|
||||
switch(dentry->d_name.len) {
|
||||
case 5:
|
||||
if (memcmp("table", name, 5) == 0)
|
||||
inode = dmfs_create_table(dir, 0600);
|
||||
break;
|
||||
case 10:
|
||||
if (memcmp("suspend_IO", name, 10) == 0)
|
||||
inode = dmfs_create_suspend(dir, 0600);
|
||||
break;
|
||||
}
|
||||
|
||||
d_add(dentry, inode);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int dmfs_lv_rename(struct inode *old_dir, struct dentry *old_dentry,
|
||||
struct inode *new_dir, struct dentry *new_dentry)
|
||||
{
|
||||
if (old_dir != new_dir)
|
||||
return -EPERM;
|
||||
|
||||
if (new_dentry->d_name[0] == '.')
|
||||
return -EPERM;
|
||||
|
||||
if (old_dentry->d_name[0] == '.')
|
||||
return -EPERM;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Taken from dcache_readdir().
|
||||
* This version has a few tweeks to ensure that we always report the
|
||||
* virtual files and that we don't report them twice.
|
||||
*/
|
||||
static int dmfs_lv_readdir(struct file *filp, void *dirent, filldir_t filldir)
|
||||
{
|
||||
int i;
|
||||
@ -143,51 +71,17 @@ static int dmfs_lv_readdir(struct file *filp, void *dirent, filldir_t filldir)
|
||||
filp->f_pos++;
|
||||
/* fallthrough */
|
||||
case 2:
|
||||
if (filldir(dirent, ".active", 7, i, 2, DT_REG) < 0)
|
||||
if (filldir(dirent, "table", 5, i, 2, DT_REG) < 0)
|
||||
break;
|
||||
i++;
|
||||
filp->f_pos++;
|
||||
/* fallthrough */
|
||||
case 3:
|
||||
if (filldir(dirent, ".suspend_IO", 11, i, 3, DT_REG) < 0)
|
||||
if (filldir(dirent, "suspend_IO", 10, i, 3, DT_REG) < 0)
|
||||
break;
|
||||
i++;
|
||||
filp->f_pos++;
|
||||
/* fallthrough */
|
||||
default: {
|
||||
struct list_head *list;
|
||||
int j = i - 4;
|
||||
|
||||
spin_lock(&dcache_lock);
|
||||
list = dentry->d_subdirs.next;
|
||||
|
||||
for(;;) {
|
||||
if (list = &dentry->d_subdirs) {
|
||||
spin_unlock(&dcache_lock);
|
||||
return 0;
|
||||
}
|
||||
if (!j)
|
||||
break;
|
||||
j--;
|
||||
list = list->next;
|
||||
}
|
||||
|
||||
while(1) {
|
||||
struct dentry *de = list_entry(list, struct dentry, d_child);
|
||||
if (!d_unhashed(de) && de->d_inode && de->d_inode->generic_ip != NULL) {
|
||||
spin_unlock(&dcache_lock);
|
||||
if (filldir(dirent, de->d_name.name, de->d_name.len, filp->f_pos, de->d_inode->i_ino, DT_REG) < 0)
|
||||
break;
|
||||
spin_lock(&dcache_lock);
|
||||
}
|
||||
filp->f_pos++;
|
||||
list = list->next;
|
||||
if (list != &dentry->d_subdirs)
|
||||
continue;
|
||||
spin_unlock(&dcache_lock);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
@ -205,11 +99,8 @@ static struct dmfs_lv_file_operations = {
|
||||
};
|
||||
|
||||
static struct dmfs_lv_inode_operations = {
|
||||
create: dmfs_lv_create,
|
||||
lookup: dmfs_lv_lookup,
|
||||
link: dmfs_lv_link,
|
||||
unlink: dmfs_lv_unlink,
|
||||
rename: dmfs_lv_rename,
|
||||
};
|
||||
|
||||
struct inode *dmfs_create_lv(struct inode *dir, struct dentry *dentry, int mode)
|
||||
|
||||
@ -25,6 +25,18 @@
|
||||
#include "dm.h"
|
||||
|
||||
|
||||
static inline char *next_token(char **p)
|
||||
{
|
||||
static const char *delim = " \t";
|
||||
char *r;
|
||||
|
||||
do {
|
||||
r = strsep(p, delim);
|
||||
} while(r && *r == 0);
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
static int dmfs_parse_line(struct dmfs_table *t, char *str)
|
||||
{
|
||||
char *p = str;
|
||||
@ -34,17 +46,17 @@ static int dmfs_parse_line(struct dmfs_table *t, char *str)
|
||||
void *context;
|
||||
struct target_type *ttype;
|
||||
|
||||
tok = strsep(&p, delim);
|
||||
tok = next_token(&p);
|
||||
if (!tok)
|
||||
return -1;
|
||||
start = simple_strtoul(tok, NULL, 10);
|
||||
|
||||
tok = strsep(&p, delim);
|
||||
tok = next_token(&p);
|
||||
if (!tok)
|
||||
return -1;
|
||||
size = simple_strtoul(tok, NULL, 10);
|
||||
|
||||
tok = strsep(&p, delim);
|
||||
tok = next_token(&p);
|
||||
if (!tok)
|
||||
return -1;
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user