From 9cc63f8bcd560c760d0b12e15bba8f81c86237cf Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 14 Aug 2026 15:43:51 -0700 Subject: Merge branches 'expcb.2026.07.24a', 'misc.2026.07.30a', 'rcu-tasks.2026.07.30a', 'srcu.2026.08.11a' and 'torture.2026.08.14a' into HEAD Changes: Make expedited grace periods expedite normal RCU callbacks Miscellaneous fixes: * Improve diagnostic output with character task states. * Mark accesses to inform KCSAN of concurrency design. * Move from kmalloc() to kmalloc_obj(). * Documentation updates. * Improve handling of RCU deferred quiescent states. * Clean up unused function arguments and structure fields. * Reduce show_rcu_gp_kthreads() stack space. Tasks RCU updates: * Clean up after SRCU re-implementation of Tasks Trace RCU. * Mark accesses to inform KCSAN of concurrency design. * Add ->lazy_timer status to diagnostic output. * Remove an unnecessary memory barrier. * Fix a data race, courtesy of KCSAN. * Documentation updates. * Convert cond_resched_tasks_rcu_qs() from macro to static inline function. SRCU updates: * Add Rust helpers for SRCU. * Avoid losing queued work at cleanup_srcu_struct() time. Torture-test updates: * Preparation work for immediate RCU priority deboosting. * Test RCU readers from real interrupt handlers (as opposed to softirq). * Simplify code through use of cpumask_next_wrap(). * Improve diagnostic output with character task states. * Add rcutorture.nwriters parameter to allow lightweight stall testing, and rcutorture.stall_only to make doing so easier. * Test an RCU Tasks Trace grace period implying an RCU grace period. * Make RCU Tasks Trace torturing track reader batches. * Fix a data race, courtesy of KCSAN. * Plug a shuffle_tmp_mask memory leak on kthread spawn failure. --- fs/jffs2/malloc.c | 299 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 299 insertions(+) create mode 100644 fs/jffs2/malloc.c (limited to 'fs/jffs2/malloc.c') diff --git a/fs/jffs2/malloc.c b/fs/jffs2/malloc.c new file mode 100644 index 000000000..411de8b36 --- /dev/null +++ b/fs/jffs2/malloc.c @@ -0,0 +1,299 @@ +/* + * JFFS2 -- Journalling Flash File System, Version 2. + * + * Copyright © 2001-2007 Red Hat, Inc. + * + * 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 "nodelist.h" + +/* These are initialised to NULL in the kernel startup code. + If you're porting to other operating systems, beware */ +static struct kmem_cache *full_dnode_slab; +static struct kmem_cache *raw_dirent_slab; +static struct kmem_cache *raw_inode_slab; +static struct kmem_cache *tmp_dnode_info_slab; +static struct kmem_cache *raw_node_ref_slab; +static struct kmem_cache *node_frag_slab; +static struct kmem_cache *inode_cache_slab; +#ifdef CONFIG_JFFS2_FS_XATTR +static struct kmem_cache *xattr_datum_cache; +static struct kmem_cache *xattr_ref_cache; +#endif + +int __init jffs2_create_slab_caches(void) +{ + full_dnode_slab = KMEM_CACHE(jffs2_full_dnode, 0); + if (!full_dnode_slab) + goto err; + + raw_dirent_slab = KMEM_CACHE(jffs2_raw_dirent, SLAB_HWCACHE_ALIGN); + if (!raw_dirent_slab) + goto err; + + raw_inode_slab = KMEM_CACHE(jffs2_raw_inode, SLAB_HWCACHE_ALIGN); + if (!raw_inode_slab) + goto err; + + tmp_dnode_info_slab = KMEM_CACHE(jffs2_tmp_dnode_info, 0); + if (!tmp_dnode_info_slab) + goto err; + + raw_node_ref_slab = kmem_cache_create("jffs2_refblock", + sizeof(struct jffs2_raw_node_ref) * (REFS_PER_BLOCK + 1), + 0, 0, NULL); + if (!raw_node_ref_slab) + goto err; + + node_frag_slab = KMEM_CACHE(jffs2_node_frag, 0); + if (!node_frag_slab) + goto err; + + inode_cache_slab = KMEM_CACHE(jffs2_inode_cache, 0); + if (!inode_cache_slab) + goto err; + +#ifdef CONFIG_JFFS2_FS_XATTR + xattr_datum_cache = KMEM_CACHE(jffs2_xattr_datum, 0); + if (!xattr_datum_cache) + goto err; + + xattr_ref_cache = KMEM_CACHE(jffs2_xattr_ref, 0); + if (!xattr_ref_cache) + goto err; +#endif + + return 0; + err: + jffs2_destroy_slab_caches(); + return -ENOMEM; +} + +void jffs2_destroy_slab_caches(void) +{ + kmem_cache_destroy(full_dnode_slab); + kmem_cache_destroy(raw_dirent_slab); + kmem_cache_destroy(raw_inode_slab); + kmem_cache_destroy(tmp_dnode_info_slab); + kmem_cache_destroy(raw_node_ref_slab); + kmem_cache_destroy(node_frag_slab); + kmem_cache_destroy(inode_cache_slab); +#ifdef CONFIG_JFFS2_FS_XATTR + kmem_cache_destroy(xattr_datum_cache); + kmem_cache_destroy(xattr_ref_cache); +#endif +} + +struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize) +{ + struct jffs2_full_dirent *ret; + ret = kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL); + dbg_memalloc("%p\n", ret); + return ret; +} + +void jffs2_free_full_dirent(struct jffs2_full_dirent *x) +{ + dbg_memalloc("%p\n", x); + kfree(x); +} + +struct jffs2_full_dnode *jffs2_alloc_full_dnode(void) +{ + struct jffs2_full_dnode *ret; + ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL); + dbg_memalloc("%p\n", ret); + return ret; +} + +void jffs2_free_full_dnode(struct jffs2_full_dnode *x) +{ + dbg_memalloc("%p\n", x); + kmem_cache_free(full_dnode_slab, x); +} + +struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void) +{ + struct jffs2_raw_dirent *ret; + ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL); + dbg_memalloc("%p\n", ret); + return ret; +} + +void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x) +{ + dbg_memalloc("%p\n", x); + kmem_cache_free(raw_dirent_slab, x); +} + +struct jffs2_raw_inode *jffs2_alloc_raw_inode(void) +{ + struct jffs2_raw_inode *ret; + ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL); + dbg_memalloc("%p\n", ret); + return ret; +} + +void jffs2_free_raw_inode(struct jffs2_raw_inode *x) +{ + dbg_memalloc("%p\n", x); + kmem_cache_free(raw_inode_slab, x); +} + +struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void) +{ + struct jffs2_tmp_dnode_info *ret; + ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL); + dbg_memalloc("%p\n", + ret); + return ret; +} + +void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x) +{ + dbg_memalloc("%p\n", x); + kmem_cache_free(tmp_dnode_info_slab, x); +} + +static struct jffs2_raw_node_ref *jffs2_alloc_refblock(void) +{ + struct jffs2_raw_node_ref *ret; + + ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL); + if (ret) { + int i = 0; + for (i=0; i < REFS_PER_BLOCK; i++) { + ret[i].flash_offset = REF_EMPTY_NODE; + ret[i].next_in_ino = NULL; + } + ret[i].flash_offset = REF_LINK_NODE; + ret[i].next_in_ino = NULL; + } + return ret; +} + +int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c, + struct jffs2_eraseblock *jeb, int nr) +{ + struct jffs2_raw_node_ref **p, *ref; + int i = nr; + + dbg_memalloc("%d\n", nr); + + p = &jeb->last_node; + ref = *p; + + dbg_memalloc("Reserving %d refs for block @0x%08x\n", nr, jeb->offset); + + /* If jeb->last_node is really a valid node then skip over it */ + if (ref && ref->flash_offset != REF_EMPTY_NODE) + ref++; + + while (i) { + if (!ref) { + dbg_memalloc("Allocating new refblock linked from %p\n", p); + ref = *p = jffs2_alloc_refblock(); + if (!ref) + return -ENOMEM; + } + if (ref->flash_offset == REF_LINK_NODE) { + p = &ref->next_in_ino; + ref = *p; + continue; + } + i--; + ref++; + } + jeb->allocated_refs = nr; + + dbg_memalloc("Reserved %d refs for block @0x%08x, last_node is %p (%08x,%p)\n", + nr, jeb->offset, jeb->last_node, jeb->last_node->flash_offset, + jeb->last_node->next_in_ino); + + return 0; +} + +void jffs2_free_refblock(struct jffs2_raw_node_ref *x) +{ + dbg_memalloc("%p\n", x); + kmem_cache_free(raw_node_ref_slab, x); +} + +struct jffs2_node_frag *jffs2_alloc_node_frag(void) +{ + struct jffs2_node_frag *ret; + ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL); + dbg_memalloc("%p\n", ret); + return ret; +} + +void jffs2_free_node_frag(struct jffs2_node_frag *x) +{ + dbg_memalloc("%p\n", x); + kmem_cache_free(node_frag_slab, x); +} + +struct jffs2_inode_cache *jffs2_alloc_inode_cache(void) +{ + struct jffs2_inode_cache *ret; + ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL); + dbg_memalloc("%p\n", ret); + return ret; +} + +void jffs2_free_inode_cache(struct jffs2_inode_cache *x) +{ + dbg_memalloc("%p\n", x); + kmem_cache_free(inode_cache_slab, x); +} + +#ifdef CONFIG_JFFS2_FS_XATTR +struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void) +{ + struct jffs2_xattr_datum *xd; + xd = kmem_cache_zalloc(xattr_datum_cache, GFP_KERNEL); + dbg_memalloc("%p\n", xd); + if (!xd) + return NULL; + + xd->class = RAWNODE_CLASS_XATTR_DATUM; + xd->node = (void *)xd; + INIT_LIST_HEAD(&xd->xindex); + return xd; +} + +void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd) +{ + dbg_memalloc("%p\n", xd); + kmem_cache_free(xattr_datum_cache, xd); +} + +struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void) +{ + struct jffs2_xattr_ref *ref; + ref = kmem_cache_zalloc(xattr_ref_cache, GFP_KERNEL); + dbg_memalloc("%p\n", ref); + if (!ref) + return NULL; + + ref->class = RAWNODE_CLASS_XATTR_REF; + ref->node = (void *)ref; + return ref; +} + +void jffs2_free_xattr_ref(struct jffs2_xattr_ref *ref) +{ + dbg_memalloc("%p\n", ref); + kmem_cache_free(xattr_ref_cache, ref); +} +#endif -- cgit v1.3.1