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; }