void __init mount_block_root(char *name, int flags)
{
char *fs_names = __getname_gfp(GFP_KERNEL
| __GFP_NOTRACK_FALSE_POSITIVE);
char *p;
#ifdef CONFIG_BLOCK
char b[BDEVNAME_SIZE];
#else
const char *b = name;
#endif
get_fs_names(fs_names);
retry:
for (p = fs_names; *p; p += strlen(p)+1) {
int err = do_mount_root(name, p, flags, root_mount_data);
switch (err) {
case 0:
goto out;
case -EACCES:
flags |= MS_RDONLY;
goto retry;
case -EINVAL:
continue;
}
/*
* Allow the user to distinguish between failed sys_open
* and bad superblock on root device.
* and give them a list of the available devices
*/
#ifdef CONFIG_BLOCK
__bdevname(ROOT_DEV, b);
#endif
printk("VFS: Cannot open root device \"%s\" or %s: error %d\n",
root_device_name, b, err);
printk("Please append a correct \"root=\" boot option; here are the available partitions:\n");
printk_all_partitions();
#ifdef CONFIG_DEBUG_BLOCK_EXT_DEVT
printk("DEBUG_BLOCK_EXT_DEVT is enabled, you need to specify "
"explicit textual name for \"root=\" boot option.\n");
#endif
panic("VFS: Unable to mount root fs on %s", b);
}
printk("List of all partitions:\n");
printk_all_partitions();
printk("No filesystem could mount root, tried: ");
for (p = fs_names; *p; p += strlen(p)+1)
printk(" %s", p);
printk("\n");
#ifdef CONFIG_BLOCK
__bdevname(ROOT_DEV, b);
#endif
panic("VFS: Unable to mount root fs on %s", b);
out:
putname(fs_names);
}
static struct dentry *au_lkup_by_ino(struct path *path, ino_t ino,
struct au_nfsd_si_lock *nsi_lock)
{
struct dentry *dentry, *parent;
struct file *file;
struct inode *dir;
struct find_name_by_ino arg;
int err;
parent = path->dentry;
if (nsi_lock)
si_read_unlock(parent->d_sb);
file = vfsub_dentry_open(path, au_dir_roflags);
dentry = (void *)file;
if (IS_ERR(file))
goto out;
dentry = ERR_PTR(-ENOMEM);
arg.name = __getname_gfp(GFP_NOFS);
if (unlikely(!arg.name))
goto out_file;
arg.ino = ino;
arg.found = 0;
do {
arg.called = 0;
/* smp_mb(); */
err = vfsub_readdir(file, find_name_by_ino, &arg);
} while (!err && !arg.found && arg.called);
dentry = ERR_PTR(err);
if (unlikely(err))
goto out_name;
dentry = ERR_PTR(-ENOENT);
if (!arg.found)
goto out_name;
/* do not call au_lkup_one() */
dir = parent->d_inode;
mutex_lock(&dir->i_mutex);
dentry = vfsub_lookup_one_len(arg.name, parent, arg.namelen);
mutex_unlock(&dir->i_mutex);
AuTraceErrPtr(dentry);
if (IS_ERR(dentry))
goto out_name;
AuDebugOn(au_test_anon(dentry));
if (unlikely(!dentry->d_inode)) {
dput(dentry);
dentry = ERR_PTR(-ENOENT);
}
out_name:
__putname(arg.name);
out_file:
fput(file);
out:
if (unlikely(nsi_lock
&& si_nfsd_read_lock(parent->d_sb, nsi_lock) < 0))
if (!IS_ERR(dentry)) {
dput(dentry);
dentry = ERR_PTR(-ESTALE);
}
AuTraceErrPtr(dentry);
return dentry;
}
