return PTR_ERR(name);
while (*name=='/')
name++;
- if (!*name)
+ if (!*name) {
+ nd->dir_mode = 0; // short-circuit the 'hardening' idiocy
return 0;
+ }
/* At this point we know we have a real path component. */
for(;;) {
}
EXPORT_SYMBOL(vfs_rename);
-static int do_renameat2(int olddfd, const char __user *oldname, int newdfd,
- const char __user *newname, unsigned int flags)
+int do_renameat2(int olddfd, struct filename *from, int newdfd,
+ struct filename *to, unsigned int flags)
{
struct dentry *old_dentry, *new_dentry;
struct dentry *trap;
struct qstr old_last, new_last;
int old_type, new_type;
struct inode *delegated_inode = NULL;
- struct filename *from;
- struct filename *to;
unsigned int lookup_flags = 0, target_flags = LOOKUP_RENAME_TARGET;
bool should_retry = false;
- int error;
+ int error = -EINVAL;
if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
- return -EINVAL;
+ goto put_both;
if ((flags & (RENAME_NOREPLACE | RENAME_WHITEOUT)) &&
(flags & RENAME_EXCHANGE))
- return -EINVAL;
+ goto put_both;
if (flags & RENAME_EXCHANGE)
target_flags = 0;
retry:
- from = filename_parentat(olddfd, getname(oldname), lookup_flags,
- &old_path, &old_last, &old_type);
+ from = filename_parentat(olddfd, from, lookup_flags, &old_path,
+ &old_last, &old_type);
if (IS_ERR(from)) {
error = PTR_ERR(from);
- goto exit;
+ goto put_new;
}
- to = filename_parentat(newdfd, getname(newname), lookup_flags,
- &new_path, &new_last, &new_type);
+ to = filename_parentat(newdfd, to, lookup_flags, &new_path, &new_last,
+ &new_type);
if (IS_ERR(to)) {
error = PTR_ERR(to);
goto exit1;
if (retry_estale(error, lookup_flags))
should_retry = true;
path_put(&new_path);
- putname(to);
exit1:
path_put(&old_path);
- putname(from);
if (should_retry) {
should_retry = false;
lookup_flags |= LOOKUP_REVAL;
goto retry;
}
-exit:
+put_both:
+ if (!IS_ERR(from))
+ putname(from);
+put_new:
+ if (!IS_ERR(to))
+ putname(to);
return error;
}
SYSCALL_DEFINE5(renameat2, int, olddfd, const char __user *, oldname,
int, newdfd, const char __user *, newname, unsigned int, flags)
{
- return do_renameat2(olddfd, oldname, newdfd, newname, flags);
+ return do_renameat2(olddfd, getname(oldname), newdfd, getname(newname),
+ flags);
}
SYSCALL_DEFINE4(renameat, int, olddfd, const char __user *, oldname,
int, newdfd, const char __user *, newname)
{
- return do_renameat2(olddfd, oldname, newdfd, newname, 0);
+ return do_renameat2(olddfd, getname(oldname), newdfd, getname(newname),
+ 0);
}
SYSCALL_DEFINE2(rename, const char __user *, oldname, const char __user *, newname)
{
- return do_renameat2(AT_FDCWD, oldname, AT_FDCWD, newname, 0);
+ return do_renameat2(AT_FDCWD, getname(oldname), AT_FDCWD,
+ getname(newname), 0);
}
int readlink_copy(char __user *buffer, int buflen, const char *link)
/*
* vfsmount lock must be held for write
*/
- unsigned int mnt_get_count(struct mount *mnt)
+ int mnt_get_count(struct mount *mnt)
{
#ifdef CONFIG_SMP
- unsigned int count = 0;
+ int count = 0;
int cpu;
for_each_possible_cpu(cpu) {
static void mntput_no_expire(struct mount *mnt)
{
LIST_HEAD(list);
+ int count;
rcu_read_lock();
if (likely(READ_ONCE(mnt->mnt_ns))) {
*/
smp_mb();
mnt_add_count(mnt, -1);
- if (mnt_get_count(mnt)) {
+ count = mnt_get_count(mnt);
+ if (count != 0) {
+ WARN_ON(count < 0);
rcu_read_unlock();
unlock_mount_hash();
return;
new_ns->ns.ops = &mntns_operations;
if (!anon)
new_ns->seq = atomic64_add_return(1, &mnt_ns_seq);
- atomic_set(&new_ns->count, 1);
+ refcount_set(&new_ns->ns.count, 1);
INIT_LIST_HEAD(&new_ns->list);
init_waitqueue_head(&new_ns->poll);
spin_lock_init(&new_ns->ns_lock);
void put_mnt_ns(struct mnt_namespace *ns)
{
- if (!atomic_dec_and_test(&ns->count))
+ if (!refcount_dec_and_test(&ns->ns.count))
return;
drop_collected_mounts(&ns->root->mnt);
free_mnt_ns(ns);
struct list_head i_devices;
union {
struct pipe_inode_info *i_pipe;
- struct block_device *i_bdev;
struct cdev *i_cdev;
char *i_link;
unsigned i_dir_seq;
const struct file_operations *f_op;
/*
- * Protects f_ep_links, f_flags.
+ * Protects f_ep, f_flags.
* Must not be taken from IRQ context.
*/
spinlock_t f_lock;
#ifdef CONFIG_EPOLL
/* Used by fs/eventpoll.c to link all the hooks to this file */
- struct list_head f_ep_links;
- struct list_head f_tfile_llink;
+ struct hlist_head *f_ep;
#endif /* #ifdef CONFIG_EPOLL */
struct address_space *f_mapping;
errseq_t f_wb_err;
struct sb_writers {
int frozen; /* Is sb frozen? */
- wait_queue_head_t wait_unfrozen; /* for get_super_thawed() */
+ wait_queue_head_t wait_unfrozen; /* wait for thaw */
struct percpu_rw_semaphore rw_sem[SB_FREEZE_LEVELS];
};
extern int generic_delete_inode(struct inode *inode);
static inline int generic_drop_inode(struct inode *inode)
{
- return !inode->i_nlink || inode_unhashed(inode) ||
- (inode->i_state & I_DONTCACHE);
+ return !inode->i_nlink || inode_unhashed(inode);
}
extern void d_mark_dontcache(struct inode *inode);
extern void put_filesystem(struct file_system_type *fs);
extern struct file_system_type *get_fs_type(const char *name);
extern struct super_block *get_super(struct block_device *);
-extern struct super_block *get_super_thawed(struct block_device *);
-extern struct super_block *get_super_exclusive_thawed(struct block_device *bdev);
extern struct super_block *get_active_super(struct block_device *bdev);
extern void drop_super(struct super_block *sb);
extern void drop_super_exclusive(struct super_block *sb);
extern int generic_ci_d_compare(const struct dentry *dentry, unsigned int len,
const char *str, const struct qstr *name);
#endif
+extern void generic_set_encrypted_ci_d_ops(struct dentry *dentry);
#ifdef CONFIG_MIGRATION
extern int buffer_migrate_page(struct address_space *,
{
struct inode *inode;
- if (!vma->vm_file)
+ if (!IS_ENABLED(CONFIG_FS_DAX) || !vma->vm_file)
return false;
if (!vma_is_dax(vma))
return false;
projects / linux-2.6-microblaze.git / commitdiff