/* * JFFS2 -- Journalling Flash File System, Version 2. * * Copyright © 2001-2007 Red Hat, Inc. * Copyright © 2004-2010 David Woodhouse * * Created by David Woodhouse * * For licensing information, see the file 'LICENCE' in this directory. * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include "nodelist.h" static int jffs2_garbage_collect_thread(void *); void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c) { assert_spin_locked(&c->erase_completion_lock); if (c->gc_task && jffs2_thread_should_wake(c)) send_sig(SIGHUP, c->gc_task, 1); } /* This must only ever be called when no GC thread is currently running */ int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c) { struct task_struct *tsk; int ret = 0; BUG_ON(c->gc_task); init_completion(&c->gc_thread_start); init_completion(&c->gc_thread_exit); tsk = kthread_run(jffs2_garbage_collect_thread, c, "jffs2_gcd_mtd%d", c->mtd->index); if (IS_ERR(tsk)) { pr_warn("fork failed for JFFS2 garbage collect thread: %ld\n", -PTR_ERR(tsk)); complete(&c->gc_thread_exit); ret = PTR_ERR(tsk); } else { /* Wait for it... */ jffs2_dbg(1, "Garbage collect thread is pid %d\n", tsk->pid); wait_for_completion(&c->gc_thread_start); ret = tsk->pid; } return ret; } void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c) { int wait = 0; spin_lock(&c->erase_completion_lock); if (c->gc_task) { jffs2_dbg(1, "Killing GC task %d\n", c->gc_task->pid); send_sig(SIGKILL, c->gc_task, 1); wait = 1; } spin_unlock(&c->erase_completion_lock); if (wait) wait_for_completion(&c->gc_thread_exit); } static int jffs2_garbage_collect_thread(void *_c) { struct jffs2_sb_info *c = _c; sigset_t hupmask; siginitset(&hupmask, sigmask(SIGHUP)); allow_signal(SIGKILL); allow_signal(SIGSTOP); allow_signal(SIGHUP); c->gc_task = current; complete(&c->gc_thread_start); set_user_nice(current, 10); set_freezable(); for (;;) { sigprocmask(SIG_UNBLOCK, &hupmask, NULL); again: spin_lock(&c->erase_completion_lock); if (!jffs2_thread_should_wake(c)) { set_current_state (TASK_INTERRUPTIBLE); spin_unlock(&c->erase_completion_lock); jffs2_dbg(1, "%s(): sleeping...\n", __func__); schedule(); } else { spin_unlock(&c->erase_completion_lock); } /* Problem - immediately after bootup, the GCD spends a lot * of time in places like jffs2_kill_fragtree(); so much so * that userspace processes (like gdm and X) are starved * despite plenty of cond_resched()s and renicing. Yield() * doesn't help, either (presumably because userspace and GCD * are generally competing for a higher latency resource - * disk). * This forces the GCD to slow the hell down. Pulling an * inode in with read_inode() is much preferable to having * the GC thread get there first. */ schedule_timeout_interruptible(msecs_to_jiffies(50)); if (kthread_should_stop()) { jffs2_dbg(1, "%s(): kthread_stop() called\n", __func__); goto die; } /* Put_super will send a SIGKILL and then wait on the sem. */ while (signal_pending(current) || freezing(current)) { unsigned long signr; if (try_to_freeze()) goto again; signr = kernel_dequeue_signal(NULL); switch(signr) { case SIGSTOP: jffs2_dbg(1, "%s(): SIGSTOP received\n", __func__); kernel_signal_stop(); break; case SIGKILL: jffs2_dbg(1, "%s(): SIGKILL received\n", __func__); goto die; case SIGHUP: jffs2_dbg(1, "%s(): SIGHUP received\n", __func__); break; default: jffs2_dbg(1, "%s(): signal %ld received\n", __func__, signr); } } /* We don't want SIGHUP to interrupt us. STOP and KILL are OK though. */ sigprocmask(SIG_BLOCK, &hupmask, NULL); jffs2_dbg(1, "%s(): pass\n", __func__); if (jffs2_garbage_collect_pass(c) == -ENOSPC) { pr_notice("No space for garbage collection. Aborting GC thread\n"); goto die; } } die: spin_lock(&c->erase_completion_lock); c->gc_task = NULL; spin_unlock(&c->erase_completion_lock); complete_and_exit(&c->gc_thread_exit, 0); } r>
authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-01-17 13:46:29 +0000
committerHerbert Xu <herbert@gondor.apana.org.au>2017-01-23 22:41:33 +0800
commit11e3b725cfc282efe9d4a354153e99d86a16af08 (patch)
tree8b5b9e0e1bcae1ab98ee652ffb7b13b05c209bd6 /fs/affs/affs.h
parentd6040764adcb5cb6de1489422411d701c158bb69 (diff)
crypto: arm64/aes-blk - honour iv_out requirement in CBC and CTR modes
Update the ARMv8 Crypto Extensions and the plain NEON AES implementations in CBC and CTR modes to return the next IV back to the skcipher API client. This is necessary for chaining to work correctly. Note that for CTR, this is only done if the request is a round multiple of the block size, since otherwise, chaining is impossible anyway. Cc: <stable@vger.kernel.org> # v3.16+ Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'fs/affs/affs.h')