/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
- * Copyright (C) 2001-2003 Red Hat, Inc.
+ * Copyright © 2001-2007 Red Hat, Inc.
*
* Created by David Woodhouse <dwmw2@infradead.org>
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: dir.c,v 1.90 2005/11/07 11:14:39 gleixner Exp $
- *
*/
#include <linux/kernel.h>
#include <linux/slab.h>
-#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/crc32.h>
#include <linux/jffs2.h>
static int jffs2_rmdir (struct inode *,struct dentry *);
static int jffs2_mknod (struct inode *,struct dentry *,int,dev_t);
static int jffs2_rename (struct inode *, struct dentry *,
- struct inode *, struct dentry *);
+ struct inode *, struct dentry *);
const struct file_operations jffs2_dir_operations =
{
.read = generic_read_dir,
.readdir = jffs2_readdir,
- .ioctl = jffs2_ioctl,
- .fsync = jffs2_fsync
+ .unlocked_ioctl=jffs2_ioctl,
+ .fsync = jffs2_fsync,
+ .llseek = generic_file_llseek,
};
-struct inode_operations jffs2_dir_inode_operations =
+const struct inode_operations jffs2_dir_inode_operations =
{
.create = jffs2_create,
.lookup = jffs2_lookup,
dir_f = JFFS2_INODE_INFO(dir_i);
c = JFFS2_SB_INFO(dir_i->i_sb);
- down(&dir_f->sem);
+ mutex_lock(&dir_f->sem);
/* NB: The 2.2 backport will need to explicitly check for '.' and '..' here */
for (fd_list = dir_f->dents; fd_list && fd_list->nhash <= target->d_name.hash; fd_list = fd_list->next) {
}
if (fd)
ino = fd->ino;
- up(&dir_f->sem);
+ mutex_unlock(&dir_f->sem);
if (ino) {
- inode = iget(dir_i->i_sb, ino);
- if (!inode) {
+ inode = jffs2_iget(dir_i->i_sb, ino);
+ if (IS_ERR(inode)) {
printk(KERN_WARNING "iget() failed for ino #%u\n", ino);
- return (ERR_PTR(-EIO));
+ return ERR_CAST(inode);
}
}
- d_add(target, inode);
-
- return NULL;
+ return d_splice_alias(inode, target);
}
/***********************************************************************/
}
curofs=1;
- down(&f->sem);
+ mutex_lock(&f->sem);
for (fd = f->dents; fd; fd = fd->next) {
curofs++;
break;
offset++;
}
- up(&f->sem);
+ mutex_unlock(&f->sem);
out:
filp->f_pos = offset;
return 0;
f = JFFS2_INODE_INFO(inode);
dir_f = JFFS2_INODE_INFO(dir_i);
+ /* jffs2_do_create() will want to lock it, _after_ reserving
+ space and taking c-alloc_sem. If we keep it locked here,
+ lockdep gets unhappy (although it's a false positive;
+ nothing else will be looking at this inode yet so there's
+ no chance of AB-BA deadlock involving its f->sem). */
+ mutex_unlock(&f->sem);
+
ret = jffs2_do_create(c, dir_f, f, ri,
dentry->d_name.name, dentry->d_name.len);
-
- if (ret)
- goto fail;
-
- ret = jffs2_init_security(inode, dir_i);
- if (ret)
- goto fail;
- ret = jffs2_init_acl(inode, dir_i);
if (ret)
goto fail;
d_instantiate(dentry, inode);
D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n",
- inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages));
+ inode->i_ino, inode->i_mode, inode->i_nlink,
+ f->inocache->pino_nlink, inode->i_mapping->nrpages));
return 0;
fail:
ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
dentry->d_name.len, dead_f, now);
if (dead_f->inocache)
- dentry->d_inode->i_nlink = dead_f->inocache->nlink;
+ dentry->d_inode->i_nlink = dead_f->inocache->pino_nlink;
if (!ret)
dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
return ret;
ret = jffs2_do_link(c, dir_f, f->inocache->ino, type, dentry->d_name.name, dentry->d_name.len, now);
if (!ret) {
- down(&f->sem);
- old_dentry->d_inode->i_nlink = ++f->inocache->nlink;
- up(&f->sem);
+ mutex_lock(&f->sem);
+ old_dentry->d_inode->i_nlink = ++f->inocache->pino_nlink;
+ mutex_unlock(&f->sem);
d_instantiate(dentry, old_dentry->d_inode);
dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
atomic_inc(&old_dentry->d_inode->i_count);
/* FIXME: If you care. We'd need to use frags for the target
if it grows much more than this */
if (targetlen > 254)
- return -EINVAL;
+ return -ENAMETOOLONG;
ri = jffs2_alloc_raw_inode();
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
- up(&f->sem);
+ mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
f->target = kmalloc(targetlen + 1, GFP_KERNEL);
if (!f->target) {
printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1);
- up(&f->sem);
+ mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return -ENOMEM;
obsoleted by the first data write
*/
f->metadata = fn;
- up(&f->sem);
+ mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return ret;
}
- ret = jffs2_init_acl(inode, dir_i);
+ ret = jffs2_init_acl_post(inode);
if (ret) {
jffs2_clear_inode(inode);
return ret;
}
dir_f = JFFS2_INODE_INFO(dir_i);
- down(&dir_f->sem);
+ mutex_lock(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
as if it were the final unlink() */
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
- up(&dir_f->sem);
+ mutex_unlock(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
- up(&dir_f->sem);
+ mutex_unlock(&dir_f->sem);
jffs2_complete_reservation(c);
d_instantiate(dentry, inode);
inode->i_op = &jffs2_dir_inode_operations;
inode->i_fop = &jffs2_dir_operations;
- /* Directories get nlink 2 at start */
- inode->i_nlink = 2;
f = JFFS2_INODE_INFO(inode);
+ /* Directories get nlink 2 at start */
+ inode->i_nlink = 2;
+ /* but ic->pino_nlink is the parent ino# */
+ f->inocache->pino_nlink = dir_i->i_ino;
+
ri->data_crc = cpu_to_je32(0);
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
- up(&f->sem);
+ mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
obsoleted by the first data write
*/
f->metadata = fn;
- up(&f->sem);
+ mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return ret;
}
- ret = jffs2_init_acl(inode, dir_i);
+ ret = jffs2_init_acl_post(inode);
if (ret) {
jffs2_clear_inode(inode);
return ret;
}
dir_f = JFFS2_INODE_INFO(dir_i);
- down(&dir_f->sem);
+ mutex_lock(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
as if it were the final unlink() */
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
- up(&dir_f->sem);
+ mutex_unlock(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
- up(&dir_f->sem);
+ mutex_unlock(&dir_f->sem);
jffs2_complete_reservation(c);
d_instantiate(dentry, inode);
static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry)
{
+ struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb);
+ struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode);
struct jffs2_full_dirent *fd;
int ret;
+ uint32_t now = get_seconds();
for (fd = f->dents ; fd; fd = fd->next) {
if (fd->ino)
return -ENOTEMPTY;
}
- ret = jffs2_unlink(dir_i, dentry);
- if (!ret)
+
+ ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
+ dentry->d_name.len, f, now);
+ if (!ret) {
+ dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
+ clear_nlink(dentry->d_inode);
drop_nlink(dir_i);
+ }
return ret;
}
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
- up(&f->sem);
+ mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
obsoleted by the first data write
*/
f->metadata = fn;
- up(&f->sem);
+ mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return ret;
}
- ret = jffs2_init_acl(inode, dir_i);
+ ret = jffs2_init_acl_post(inode);
if (ret) {
jffs2_clear_inode(inode);
return ret;
}
dir_f = JFFS2_INODE_INFO(dir_i);
- down(&dir_f->sem);
+ mutex_lock(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
as if it were the final unlink() */
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
- up(&dir_f->sem);
+ mutex_unlock(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
- up(&dir_f->sem);
+ mutex_unlock(&dir_f->sem);
jffs2_complete_reservation(c);
d_instantiate(dentry, inode);
}
static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
- struct inode *new_dir_i, struct dentry *new_dentry)
+ struct inode *new_dir_i, struct dentry *new_dentry)
{
int ret;
struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dir_i->i_sb);
if (S_ISDIR(new_dentry->d_inode->i_mode)) {
struct jffs2_full_dirent *fd;
- down(&victim_f->sem);
+ mutex_lock(&victim_f->sem);
for (fd = victim_f->dents; fd; fd = fd->next) {
if (fd->ino) {
- up(&victim_f->sem);
+ mutex_unlock(&victim_f->sem);
return -ENOTEMPTY;
}
}
- up(&victim_f->sem);
+ mutex_unlock(&victim_f->sem);
}
}
/* Don't oops if the victim was a dirent pointing to an
inode which didn't exist. */
if (victim_f->inocache) {
- down(&victim_f->sem);
- victim_f->inocache->nlink--;
- up(&victim_f->sem);
+ mutex_lock(&victim_f->sem);
+ if (S_ISDIR(new_dentry->d_inode->i_mode))
+ victim_f->inocache->pino_nlink = 0;
+ else
+ victim_f->inocache->pino_nlink--;
+ mutex_unlock(&victim_f->sem);
}
}
if (ret) {
/* Oh shit. We really ought to make a single node which can do both atomically */
struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
- down(&f->sem);
+ mutex_lock(&f->sem);
inc_nlink(old_dentry->d_inode);
- if (f->inocache)
- f->inocache->nlink++;
- up(&f->sem);
+ if (f->inocache && !S_ISDIR(old_dentry->d_inode->i_mode))
+ f->inocache->pino_nlink++;
+ mutex_unlock(&f->sem);
printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret);
/* Might as well let the VFS know */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff