/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
- * Copyright (C) 2001-2003 Red Hat, Inc.
+ * Copyright © 2001-2007 Red Hat, Inc.
*
* Created by David Woodhouse <dwmw2@infradead.org>
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: nodemgmt.c,v 1.118 2005/02/27 23:01:32 dwmw2 Exp $
- *
*/
#include <linux/kernel.h>
#include <linux/compiler.h>
#include <linux/sched.h> /* For cond_resched() */
#include "nodelist.h"
+#include "debug.h"
/**
* jffs2_reserve_space - request physical space to write nodes to flash
* @c: superblock info
* @minsize: Minimum acceptable size of allocation
- * @ofs: Returned value of node offset
* @len: Returned value of allocation length
* @prio: Allocation type - ALLOC_{NORMAL,DELETION}
*
* Requests a block of physical space on the flash. Returns zero for success
- * and puts 'ofs' and 'len' into the appriopriate place, or returns -ENOSPC
- * or other error if appropriate.
+ * and puts 'len' into the appropriate place, or returns -ENOSPC or other
+ * error if appropriate. Doesn't return len since that's
*
* If it returns zero, jffs2_reserve_space() also downs the per-filesystem
* allocation semaphore, to prevent more than one allocation from being
* for the requested allocation.
*/
-static int jffs2_do_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, uint32_t *ofs, uint32_t *len);
+static int jffs2_do_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
+ uint32_t *len, uint32_t sumsize);
-int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, uint32_t *ofs, uint32_t *len, int prio)
+int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
+ uint32_t *len, int prio, uint32_t sumsize)
{
int ret = -EAGAIN;
int blocksneeded = c->resv_blocks_write;
minsize = PAD(minsize);
D1(printk(KERN_DEBUG "jffs2_reserve_space(): Requested 0x%x bytes\n", minsize));
- down(&c->alloc_sem);
+ mutex_lock(&c->alloc_sem);
D1(printk(KERN_DEBUG "jffs2_reserve_space(): alloc sem got\n"));
/* this needs a little more thought (true <tglx> :)) */
while(ret == -EAGAIN) {
while(c->nr_free_blocks + c->nr_erasing_blocks < blocksneeded) {
- int ret;
uint32_t dirty, avail;
/* calculate real dirty size
dirty = c->dirty_size + c->erasing_size - c->nr_erasing_blocks * c->sector_size + c->unchecked_size;
if (dirty < c->nospc_dirty_size) {
if (prio == ALLOC_DELETION && c->nr_free_blocks + c->nr_erasing_blocks >= c->resv_blocks_deletion) {
- printk(KERN_NOTICE "jffs2_reserve_space(): Low on dirty space to GC, but it's a deletion. Allowing...\n");
+ D1(printk(KERN_NOTICE "jffs2_reserve_space(): Low on dirty space to GC, but it's a deletion. Allowing...\n"));
break;
}
D1(printk(KERN_DEBUG "dirty size 0x%08x + unchecked_size 0x%08x < nospc_dirty_size 0x%08x, returning -ENOSPC\n",
dirty, c->unchecked_size, c->sector_size));
spin_unlock(&c->erase_completion_lock);
- up(&c->alloc_sem);
+ mutex_unlock(&c->alloc_sem);
return -ENOSPC;
}
-
+
/* Calc possibly available space. Possibly available means that we
* don't know, if unchecked size contains obsoleted nodes, which could give us some
* more usable space. This will affect the sum only once, as gc first finishes checking
* of nodes.
- + Return -ENOSPC, if the maximum possibly available space is less or equal than
+ + Return -ENOSPC, if the maximum possibly available space is less or equal than
* blocksneeded * sector_size.
* This blocks endless gc looping on a filesystem, which is nearly full, even if
* the check above passes.
avail = c->free_size + c->dirty_size + c->erasing_size + c->unchecked_size;
if ( (avail / c->sector_size) <= blocksneeded) {
if (prio == ALLOC_DELETION && c->nr_free_blocks + c->nr_erasing_blocks >= c->resv_blocks_deletion) {
- printk(KERN_NOTICE "jffs2_reserve_space(): Low on possibly available space, but it's a deletion. Allowing...\n");
+ D1(printk(KERN_NOTICE "jffs2_reserve_space(): Low on possibly available space, but it's a deletion. Allowing...\n"));
break;
}
D1(printk(KERN_DEBUG "max. available size 0x%08x < blocksneeded * sector_size 0x%08x, returning -ENOSPC\n",
avail, blocksneeded * c->sector_size));
spin_unlock(&c->erase_completion_lock);
- up(&c->alloc_sem);
+ mutex_unlock(&c->alloc_sem);
return -ENOSPC;
}
- up(&c->alloc_sem);
+ mutex_unlock(&c->alloc_sem);
D1(printk(KERN_DEBUG "Triggering GC pass. nr_free_blocks %d, nr_erasing_blocks %d, free_size 0x%08x, dirty_size 0x%08x, wasted_size 0x%08x, used_size 0x%08x, erasing_size 0x%08x, bad_size 0x%08x (total 0x%08x of 0x%08x)\n",
c->nr_free_blocks, c->nr_erasing_blocks, c->free_size, c->dirty_size, c->wasted_size, c->used_size, c->erasing_size, c->bad_size,
c->free_size + c->dirty_size + c->wasted_size + c->used_size + c->erasing_size + c->bad_size, c->flash_size));
spin_unlock(&c->erase_completion_lock);
-
+
ret = jffs2_garbage_collect_pass(c);
if (ret)
return ret;
if (signal_pending(current))
return -EINTR;
- down(&c->alloc_sem);
+ mutex_lock(&c->alloc_sem);
spin_lock(&c->erase_completion_lock);
}
- ret = jffs2_do_reserve_space(c, minsize, ofs, len);
+ ret = jffs2_do_reserve_space(c, minsize, len, sumsize);
if (ret) {
D1(printk(KERN_DEBUG "jffs2_reserve_space: ret is %d\n", ret));
}
}
spin_unlock(&c->erase_completion_lock);
+ if (!ret)
+ ret = jffs2_prealloc_raw_node_refs(c, c->nextblock, 1);
if (ret)
- up(&c->alloc_sem);
+ mutex_unlock(&c->alloc_sem);
return ret;
}
-int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize, uint32_t *ofs, uint32_t *len)
+int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize,
+ uint32_t *len, uint32_t sumsize)
{
int ret = -EAGAIN;
minsize = PAD(minsize);
spin_lock(&c->erase_completion_lock);
while(ret == -EAGAIN) {
- ret = jffs2_do_reserve_space(c, minsize, ofs, len);
+ ret = jffs2_do_reserve_space(c, minsize, len, sumsize);
if (ret) {
- D1(printk(KERN_DEBUG "jffs2_reserve_space_gc: looping, ret is %d\n", ret));
+ D1(printk(KERN_DEBUG "jffs2_reserve_space_gc: looping, ret is %d\n", ret));
}
}
spin_unlock(&c->erase_completion_lock);
+ if (!ret)
+ ret = jffs2_prealloc_raw_node_refs(c, c->nextblock, 1);
+
return ret;
}
-/* Called with alloc sem _and_ erase_completion_lock */
-static int jffs2_do_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, uint32_t *ofs, uint32_t *len)
+
+/* Classify nextblock (clean, dirty of verydirty) and force to select an other one */
+
+static void jffs2_close_nextblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb)
{
- struct jffs2_eraseblock *jeb = c->nextblock;
-
- restart:
- if (jeb && minsize > jeb->free_size) {
- /* Skip the end of this block and file it as having some dirty space */
- /* If there's a pending write to it, flush now */
- if (jffs2_wbuf_dirty(c)) {
+
+ if (c->nextblock == NULL) {
+ D1(printk(KERN_DEBUG "jffs2_close_nextblock: Erase block at 0x%08x has already been placed in a list\n",
+ jeb->offset));
+ return;
+ }
+ /* Check, if we have a dirty block now, or if it was dirty already */
+ if (ISDIRTY (jeb->wasted_size + jeb->dirty_size)) {
+ c->dirty_size += jeb->wasted_size;
+ c->wasted_size -= jeb->wasted_size;
+ jeb->dirty_size += jeb->wasted_size;
+ jeb->wasted_size = 0;
+ if (VERYDIRTY(c, jeb->dirty_size)) {
+ D1(printk(KERN_DEBUG "Adding full erase block at 0x%08x to very_dirty_list (free 0x%08x, dirty 0x%08x, used 0x%08x\n",
+ jeb->offset, jeb->free_size, jeb->dirty_size, jeb->used_size));
+ list_add_tail(&jeb->list, &c->very_dirty_list);
+ } else {
+ D1(printk(KERN_DEBUG "Adding full erase block at 0x%08x to dirty_list (free 0x%08x, dirty 0x%08x, used 0x%08x\n",
+ jeb->offset, jeb->free_size, jeb->dirty_size, jeb->used_size));
+ list_add_tail(&jeb->list, &c->dirty_list);
+ }
+ } else {
+ D1(printk(KERN_DEBUG "Adding full erase block at 0x%08x to clean_list (free 0x%08x, dirty 0x%08x, used 0x%08x\n",
+ jeb->offset, jeb->free_size, jeb->dirty_size, jeb->used_size));
+ list_add_tail(&jeb->list, &c->clean_list);
+ }
+ c->nextblock = NULL;
+
+}
+
+/* Select a new jeb for nextblock */
+
+static int jffs2_find_nextblock(struct jffs2_sb_info *c)
+{
+ struct list_head *next;
+
+ /* Take the next block off the 'free' list */
+
+ if (list_empty(&c->free_list)) {
+
+ if (!c->nr_erasing_blocks &&
+ !list_empty(&c->erasable_list)) {
+ struct jffs2_eraseblock *ejeb;
+
+ ejeb = list_entry(c->erasable_list.next, struct jffs2_eraseblock, list);
+ list_move_tail(&ejeb->list, &c->erase_pending_list);
+ c->nr_erasing_blocks++;
+ jffs2_erase_pending_trigger(c);
+ D1(printk(KERN_DEBUG "jffs2_find_nextblock: Triggering erase of erasable block at 0x%08x\n",
+ ejeb->offset));
+ }
+
+ if (!c->nr_erasing_blocks &&
+ !list_empty(&c->erasable_pending_wbuf_list)) {
+ D1(printk(KERN_DEBUG "jffs2_find_nextblock: Flushing write buffer\n"));
+ /* c->nextblock is NULL, no update to c->nextblock allowed */
spin_unlock(&c->erase_completion_lock);
- D1(printk(KERN_DEBUG "jffs2_do_reserve_space: Flushing write buffer\n"));
jffs2_flush_wbuf_pad(c);
spin_lock(&c->erase_completion_lock);
- jeb = c->nextblock;
- goto restart;
+ /* Have another go. It'll be on the erasable_list now */
+ return -EAGAIN;
}
- c->wasted_size += jeb->free_size;
- c->free_size -= jeb->free_size;
- jeb->wasted_size += jeb->free_size;
- jeb->free_size = 0;
-
- /* Check, if we have a dirty block now, or if it was dirty already */
- if (ISDIRTY (jeb->wasted_size + jeb->dirty_size)) {
- c->dirty_size += jeb->wasted_size;
- c->wasted_size -= jeb->wasted_size;
- jeb->dirty_size += jeb->wasted_size;
- jeb->wasted_size = 0;
- if (VERYDIRTY(c, jeb->dirty_size)) {
- D1(printk(KERN_DEBUG "Adding full erase block at 0x%08x to very_dirty_list (free 0x%08x, dirty 0x%08x, used 0x%08x\n",
- jeb->offset, jeb->free_size, jeb->dirty_size, jeb->used_size));
- list_add_tail(&jeb->list, &c->very_dirty_list);
- } else {
- D1(printk(KERN_DEBUG "Adding full erase block at 0x%08x to dirty_list (free 0x%08x, dirty 0x%08x, used 0x%08x\n",
- jeb->offset, jeb->free_size, jeb->dirty_size, jeb->used_size));
- list_add_tail(&jeb->list, &c->dirty_list);
- }
- } else {
- D1(printk(KERN_DEBUG "Adding full erase block at 0x%08x to clean_list (free 0x%08x, dirty 0x%08x, used 0x%08x\n",
- jeb->offset, jeb->free_size, jeb->dirty_size, jeb->used_size));
- list_add_tail(&jeb->list, &c->clean_list);
+
+ if (!c->nr_erasing_blocks) {
+ /* Ouch. We're in GC, or we wouldn't have got here.
+ And there's no space left. At all. */
+ printk(KERN_CRIT "Argh. No free space left for GC. nr_erasing_blocks is %d. nr_free_blocks is %d. (erasableempty: %s, erasingempty: %s, erasependingempty: %s)\n",
+ c->nr_erasing_blocks, c->nr_free_blocks, list_empty(&c->erasable_list)?"yes":"no",
+ list_empty(&c->erasing_list)?"yes":"no", list_empty(&c->erase_pending_list)?"yes":"no");
+ return -ENOSPC;
}
- c->nextblock = jeb = NULL;
+
+ spin_unlock(&c->erase_completion_lock);
+ /* Don't wait for it; just erase one right now */
+ jffs2_erase_pending_blocks(c, 1);
+ spin_lock(&c->erase_completion_lock);
+
+ /* An erase may have failed, decreasing the
+ amount of free space available. So we must
+ restart from the beginning */
+ return -EAGAIN;
}
-
- if (!jeb) {
- struct list_head *next;
- /* Take the next block off the 'free' list */
- if (list_empty(&c->free_list)) {
+ next = c->free_list.next;
+ list_del(next);
+ c->nextblock = list_entry(next, struct jffs2_eraseblock, list);
+ c->nr_free_blocks--;
- if (!c->nr_erasing_blocks &&
- !list_empty(&c->erasable_list)) {
- struct jffs2_eraseblock *ejeb;
+ jffs2_sum_reset_collected(c->summary); /* reset collected summary */
- ejeb = list_entry(c->erasable_list.next, struct jffs2_eraseblock, list);
- list_del(&ejeb->list);
- list_add_tail(&ejeb->list, &c->erase_pending_list);
- c->nr_erasing_blocks++;
- jffs2_erase_pending_trigger(c);
- D1(printk(KERN_DEBUG "jffs2_do_reserve_space: Triggering erase of erasable block at 0x%08x\n",
- ejeb->offset));
+ D1(printk(KERN_DEBUG "jffs2_find_nextblock(): new nextblock = 0x%08x\n", c->nextblock->offset));
+
+ return 0;
+}
+
+/* Called with alloc sem _and_ erase_completion_lock */
+static int jffs2_do_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
+ uint32_t *len, uint32_t sumsize)
+{
+ struct jffs2_eraseblock *jeb = c->nextblock;
+ uint32_t reserved_size; /* for summary information at the end of the jeb */
+ int ret;
+
+ restart:
+ reserved_size = 0;
+
+ if (jffs2_sum_active() && (sumsize != JFFS2_SUMMARY_NOSUM_SIZE)) {
+ /* NOSUM_SIZE means not to generate summary */
+
+ if (jeb) {
+ reserved_size = PAD(sumsize + c->summary->sum_size + JFFS2_SUMMARY_FRAME_SIZE);
+ dbg_summary("minsize=%d , jeb->free=%d ,"
+ "summary->size=%d , sumsize=%d\n",
+ minsize, jeb->free_size,
+ c->summary->sum_size, sumsize);
+ }
+
+ /* Is there enough space for writing out the current node, or we have to
+ write out summary information now, close this jeb and select new nextblock? */
+ if (jeb && (PAD(minsize) + PAD(c->summary->sum_size + sumsize +
+ JFFS2_SUMMARY_FRAME_SIZE) > jeb->free_size)) {
+
+ /* Has summary been disabled for this jeb? */
+ if (jffs2_sum_is_disabled(c->summary)) {
+ sumsize = JFFS2_SUMMARY_NOSUM_SIZE;
+ goto restart;
}
- if (!c->nr_erasing_blocks &&
- !list_empty(&c->erasable_pending_wbuf_list)) {
- D1(printk(KERN_DEBUG "jffs2_do_reserve_space: Flushing write buffer\n"));
- /* c->nextblock is NULL, no update to c->nextblock allowed */
+ /* Writing out the collected summary information */
+ dbg_summary("generating summary for 0x%08x.\n", jeb->offset);
+ ret = jffs2_sum_write_sumnode(c);
+
+ if (ret)
+ return ret;
+
+ if (jffs2_sum_is_disabled(c->summary)) {
+ /* jffs2_write_sumnode() couldn't write out the summary information
+ diabling summary for this jeb and free the collected information
+ */
+ sumsize = JFFS2_SUMMARY_NOSUM_SIZE;
+ goto restart;
+ }
+
+ jffs2_close_nextblock(c, jeb);
+ jeb = NULL;
+ /* keep always valid value in reserved_size */
+ reserved_size = PAD(sumsize + c->summary->sum_size + JFFS2_SUMMARY_FRAME_SIZE);
+ }
+ } else {
+ if (jeb && minsize > jeb->free_size) {
+ uint32_t waste;
+
+ /* Skip the end of this block and file it as having some dirty space */
+ /* If there's a pending write to it, flush now */
+
+ if (jffs2_wbuf_dirty(c)) {
spin_unlock(&c->erase_completion_lock);
+ D1(printk(KERN_DEBUG "jffs2_do_reserve_space: Flushing write buffer\n"));
jffs2_flush_wbuf_pad(c);
spin_lock(&c->erase_completion_lock);
- /* Have another go. It'll be on the erasable_list now */
- return -EAGAIN;
- }
-
- if (!c->nr_erasing_blocks) {
- /* Ouch. We're in GC, or we wouldn't have got here.
- And there's no space left. At all. */
- printk(KERN_CRIT "Argh. No free space left for GC. nr_erasing_blocks is %d. nr_free_blocks is %d. (erasableempty: %s, erasingempty: %s, erasependingempty: %s)\n",
- c->nr_erasing_blocks, c->nr_free_blocks, list_empty(&c->erasable_list)?"yes":"no",
- list_empty(&c->erasing_list)?"yes":"no", list_empty(&c->erase_pending_list)?"yes":"no");
- return -ENOSPC;
+ jeb = c->nextblock;
+ goto restart;
}
spin_unlock(&c->erase_completion_lock);
- /* Don't wait for it; just erase one right now */
- jffs2_erase_pending_blocks(c, 1);
+
+ ret = jffs2_prealloc_raw_node_refs(c, jeb, 1);
+ if (ret)
+ return ret;
+ /* Just lock it again and continue. Nothing much can change because
+ we hold c->alloc_sem anyway. In fact, it's not entirely clear why
+ we hold c->erase_completion_lock in the majority of this function...
+ but that's a question for another (more caffeine-rich) day. */
spin_lock(&c->erase_completion_lock);
- /* An erase may have failed, decreasing the
- amount of free space available. So we must
- restart from the beginning */
- return -EAGAIN;
+ waste = jeb->free_size;
+ jffs2_link_node_ref(c, jeb,
+ (jeb->offset + c->sector_size - waste) | REF_OBSOLETE,
+ waste, NULL);
+ /* FIXME: that made it count as dirty. Convert to wasted */
+ jeb->dirty_size -= waste;
+ c->dirty_size -= waste;
+ jeb->wasted_size += waste;
+ c->wasted_size += waste;
+
+ jffs2_close_nextblock(c, jeb);
+ jeb = NULL;
}
+ }
- next = c->free_list.next;
- list_del(next);
- c->nextblock = jeb = list_entry(next, struct jffs2_eraseblock, list);
- c->nr_free_blocks--;
+ if (!jeb) {
+
+ ret = jffs2_find_nextblock(c);
+ if (ret)
+ return ret;
+
+ jeb = c->nextblock;
if (jeb->free_size != c->sector_size - c->cleanmarker_size) {
printk(KERN_WARNING "Eep. Block 0x%08x taken from free_list had free_size of 0x%08x!!\n", jeb->offset, jeb->free_size);
}
/* OK, jeb (==c->nextblock) is now pointing at a block which definitely has
enough space */
- *ofs = jeb->offset + (c->sector_size - jeb->free_size);
- *len = jeb->free_size;
+ *len = jeb->free_size - reserved_size;
if (c->cleanmarker_size && jeb->used_size == c->cleanmarker_size &&
!jeb->first_node->next_in_ino) {
- /* Only node in it beforehand was a CLEANMARKER node (we think).
+ /* Only node in it beforehand was a CLEANMARKER node (we think).
So mark it obsolete now that there's going to be another node
- in the block. This will reduce used_size to zero but We've
+ in the block. This will reduce used_size to zero but We've
already set c->nextblock so that jffs2_mark_node_obsolete()
won't try to refile it to the dirty_list.
*/
spin_lock(&c->erase_completion_lock);
}
- D1(printk(KERN_DEBUG "jffs2_do_reserve_space(): Giving 0x%x bytes at 0x%x\n", *len, *ofs));
+ D1(printk(KERN_DEBUG "jffs2_do_reserve_space(): Giving 0x%x bytes at 0x%x\n",
+ *len, jeb->offset + (c->sector_size - jeb->free_size)));
return 0;
}
* @c: superblock info
* @new: new node reference to add
* @len: length of this physical node
- * @dirty: dirty flag for new node
*
- * Should only be used to report nodes for which space has been allocated
+ * Should only be used to report nodes for which space has been allocated
* by jffs2_reserve_space.
*
* Must be called with the alloc_sem held.
*/
-
-int jffs2_add_physical_node_ref(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *new)
+
+struct jffs2_raw_node_ref *jffs2_add_physical_node_ref(struct jffs2_sb_info *c,
+ uint32_t ofs, uint32_t len,
+ struct jffs2_inode_cache *ic)
{
struct jffs2_eraseblock *jeb;
- uint32_t len;
+ struct jffs2_raw_node_ref *new;
- jeb = &c->blocks[new->flash_offset / c->sector_size];
- len = ref_totlen(c, jeb, new);
+ jeb = &c->blocks[ofs / c->sector_size];
- D1(printk(KERN_DEBUG "jffs2_add_physical_node_ref(): Node at 0x%x(%d), size 0x%x\n", ref_offset(new), ref_flags(new), len));
+ D1(printk(KERN_DEBUG "jffs2_add_physical_node_ref(): Node at 0x%x(%d), size 0x%x\n",
+ ofs & ~3, ofs & 3, len));
#if 1
- /* we could get some obsolete nodes after nextblock was refiled
- in wbuf.c */
- if ((c->nextblock || !ref_obsolete(new))
- &&(jeb != c->nextblock || ref_offset(new) != jeb->offset + (c->sector_size - jeb->free_size))) {
- printk(KERN_WARNING "argh. node added in wrong place\n");
- jffs2_free_raw_node_ref(new);
- return -EINVAL;
+ /* Allow non-obsolete nodes only to be added at the end of c->nextblock,
+ if c->nextblock is set. Note that wbuf.c will file obsolete nodes
+ even after refiling c->nextblock */
+ if ((c->nextblock || ((ofs & 3) != REF_OBSOLETE))
+ && (jeb != c->nextblock || (ofs & ~3) != jeb->offset + (c->sector_size - jeb->free_size))) {
+ printk(KERN_WARNING "argh. node added in wrong place at 0x%08x(%d)\n", ofs & ~3, ofs & 3);
+ if (c->nextblock)
+ printk(KERN_WARNING "nextblock 0x%08x", c->nextblock->offset);
+ else
+ printk(KERN_WARNING "No nextblock");
+ printk(", expected at %08x\n", jeb->offset + (c->sector_size - jeb->free_size));
+ return ERR_PTR(-EINVAL);
}
#endif
spin_lock(&c->erase_completion_lock);
- if (!jeb->first_node)
- jeb->first_node = new;
- if (jeb->last_node)
- jeb->last_node->next_phys = new;
- jeb->last_node = new;
-
- jeb->free_size -= len;
- c->free_size -= len;
- if (ref_obsolete(new)) {
- jeb->dirty_size += len;
- c->dirty_size += len;
- } else {
- jeb->used_size += len;
- c->used_size += len;
- }
+ new = jffs2_link_node_ref(c, jeb, ofs, len, ic);
if (!jeb->free_size && !jeb->dirty_size && !ISDIRTY(jeb->wasted_size)) {
/* If it lives on the dirty_list, jffs2_reserve_space will put it there */
list_add_tail(&jeb->list, &c->clean_list);
c->nextblock = NULL;
}
- ACCT_SANITY_CHECK(c,jeb);
- D1(ACCT_PARANOIA_CHECK(jeb));
+ jffs2_dbg_acct_sanity_check_nolock(c,jeb);
+ jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
spin_unlock(&c->erase_completion_lock);
- return 0;
+ return new;
}
{
D1(printk(KERN_DEBUG "jffs2_complete_reservation()\n"));
jffs2_garbage_collect_trigger(c);
- up(&c->alloc_sem);
+ mutex_unlock(&c->alloc_sem);
}
static inline int on_list(struct list_head *obj, struct list_head *head)
struct jffs2_unknown_node n;
int ret, addedsize;
size_t retlen;
+ uint32_t freed_len;
- if(!ref) {
+ if(unlikely(!ref)) {
printk(KERN_NOTICE "EEEEEK. jffs2_mark_node_obsolete called with NULL node\n");
return;
}
jeb = &c->blocks[blocknr];
if (jffs2_can_mark_obsolete(c) && !jffs2_is_readonly(c) &&
- !(c->flags & JFFS2_SB_FLAG_MOUNTING)) {
- /* Hm. This may confuse static lock analysis. If any of the above
- three conditions is false, we're going to return from this
+ !(c->flags & (JFFS2_SB_FLAG_SCANNING | JFFS2_SB_FLAG_BUILDING))) {
+ /* Hm. This may confuse static lock analysis. If any of the above
+ three conditions is false, we're going to return from this
function without actually obliterating any nodes or freeing
any jffs2_raw_node_refs. So we don't need to stop erases from
happening, or protect against people holding an obsolete
jffs2_raw_node_ref without the erase_completion_lock. */
- down(&c->erase_free_sem);
+ mutex_lock(&c->erase_free_sem);
}
spin_lock(&c->erase_completion_lock);
+ freed_len = ref_totlen(c, jeb, ref);
+
if (ref_flags(ref) == REF_UNCHECKED) {
- D1(if (unlikely(jeb->unchecked_size < ref_totlen(c, jeb, ref))) {
+ D1(if (unlikely(jeb->unchecked_size < freed_len)) {
printk(KERN_NOTICE "raw unchecked node of size 0x%08x freed from erase block %d at 0x%08x, but unchecked_size was already 0x%08x\n",
- ref_totlen(c, jeb, ref), blocknr, ref->flash_offset, jeb->used_size);
+ freed_len, blocknr, ref->flash_offset, jeb->used_size);
BUG();
})
- D1(printk(KERN_DEBUG "Obsoleting previously unchecked node at 0x%08x of len %x: ", ref_offset(ref), ref_totlen(c, jeb, ref)));
- jeb->unchecked_size -= ref_totlen(c, jeb, ref);
- c->unchecked_size -= ref_totlen(c, jeb, ref);
+ D1(printk(KERN_DEBUG "Obsoleting previously unchecked node at 0x%08x of len %x: ", ref_offset(ref), freed_len));
+ jeb->unchecked_size -= freed_len;
+ c->unchecked_size -= freed_len;
} else {
- D1(if (unlikely(jeb->used_size < ref_totlen(c, jeb, ref))) {
+ D1(if (unlikely(jeb->used_size < freed_len)) {
printk(KERN_NOTICE "raw node of size 0x%08x freed from erase block %d at 0x%08x, but used_size was already 0x%08x\n",
- ref_totlen(c, jeb, ref), blocknr, ref->flash_offset, jeb->used_size);
+ freed_len, blocknr, ref->flash_offset, jeb->used_size);
BUG();
})
- D1(printk(KERN_DEBUG "Obsoleting node at 0x%08x of len %x: ", ref_offset(ref), ref_totlen(c, jeb, ref)));
- jeb->used_size -= ref_totlen(c, jeb, ref);
- c->used_size -= ref_totlen(c, jeb, ref);
+ D1(printk(KERN_DEBUG "Obsoleting node at 0x%08x of len %#x: ", ref_offset(ref), freed_len));
+ jeb->used_size -= freed_len;
+ c->used_size -= freed_len;
}
// Take care, that wasted size is taken into concern
- if ((jeb->dirty_size || ISDIRTY(jeb->wasted_size + ref_totlen(c, jeb, ref))) && jeb != c->nextblock) {
+ if ((jeb->dirty_size || ISDIRTY(jeb->wasted_size + freed_len)) && jeb != c->nextblock) {
D1(printk("Dirtying\n"));
- addedsize = ref_totlen(c, jeb, ref);
- jeb->dirty_size += ref_totlen(c, jeb, ref);
- c->dirty_size += ref_totlen(c, jeb, ref);
+ addedsize = freed_len;
+ jeb->dirty_size += freed_len;
+ c->dirty_size += freed_len;
/* Convert wasted space to dirty, if not a bad block */
if (jeb->wasted_size) {
} else {
D1(printk("Wasting\n"));
addedsize = 0;
- jeb->wasted_size += ref_totlen(c, jeb, ref);
- c->wasted_size += ref_totlen(c, jeb, ref);
+ jeb->wasted_size += freed_len;
+ c->wasted_size += freed_len;
}
ref->flash_offset = ref_offset(ref) | REF_OBSOLETE;
-
- ACCT_SANITY_CHECK(c, jeb);
- D1(ACCT_PARANOIA_CHECK(jeb));
+ jffs2_dbg_acct_sanity_check_nolock(c, jeb);
+ jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
- if (c->flags & JFFS2_SB_FLAG_MOUNTING) {
- /* Mount in progress. Don't muck about with the block
+ if (c->flags & JFFS2_SB_FLAG_SCANNING) {
+ /* Flash scanning is in progress. Don't muck about with the block
lists because they're not ready yet, and don't actually
- obliterate nodes that look obsolete. If they weren't
+ obliterate nodes that look obsolete. If they weren't
marked obsolete on the flash at the time they _became_
obsolete, there was probably a reason for that. */
spin_unlock(&c->erase_completion_lock);
immediately reused, and we spread the load a bit. */
D1(printk(KERN_DEBUG "...and adding to erasable_list\n"));
list_add_tail(&jeb->list, &c->erasable_list);
- }
+ }
}
D1(printk(KERN_DEBUG "Done OK\n"));
} else if (jeb == c->gcblock) {
list_add_tail(&jeb->list, &c->very_dirty_list);
} else {
D1(printk(KERN_DEBUG "Eraseblock at 0x%08x not moved anywhere. (free 0x%08x, dirty 0x%08x, used 0x%08x)\n",
- jeb->offset, jeb->free_size, jeb->dirty_size, jeb->used_size));
- }
+ jeb->offset, jeb->free_size, jeb->dirty_size, jeb->used_size));
+ }
spin_unlock(&c->erase_completion_lock);
- if (!jffs2_can_mark_obsolete(c) || jffs2_is_readonly(c)) {
+ if (!jffs2_can_mark_obsolete(c) || jffs2_is_readonly(c) ||
+ (c->flags & JFFS2_SB_FLAG_BUILDING)) {
/* We didn't lock the erase_free_sem */
return;
}
/* The erase_free_sem is locked, and has been since before we marked the node obsolete
and potentially put its eraseblock onto the erase_pending_list. Thus, we know that
the block hasn't _already_ been erased, and that 'ref' itself hasn't been freed yet
- by jffs2_free_all_node_refs() in erase.c. Which is nice. */
+ by jffs2_free_jeb_node_refs() in erase.c. Which is nice. */
D1(printk(KERN_DEBUG "obliterating obsoleted node at 0x%08x\n", ref_offset(ref)));
ret = jffs2_flash_read(c, ref_offset(ref), sizeof(n), &retlen, (char *)&n);
printk(KERN_WARNING "Short read from obsoleted node at 0x%08x: %zd\n", ref_offset(ref), retlen);
goto out_erase_sem;
}
- if (PAD(je32_to_cpu(n.totlen)) != PAD(ref_totlen(c, jeb, ref))) {
- printk(KERN_WARNING "Node totlen on flash (0x%08x) != totlen from node ref (0x%08x)\n", je32_to_cpu(n.totlen), ref_totlen(c, jeb, ref));
+ if (PAD(je32_to_cpu(n.totlen)) != PAD(freed_len)) {
+ printk(KERN_WARNING "Node totlen on flash (0x%08x) != totlen from node ref (0x%08x)\n", je32_to_cpu(n.totlen), freed_len);
goto out_erase_sem;
}
if (!(je16_to_cpu(n.nodetype) & JFFS2_NODE_ACCURATE)) {
/* Nodes which have been marked obsolete no longer need to be
associated with any inode. Remove them from the per-inode list.
-
- Note we can't do this for NAND at the moment because we need
+
+ Note we can't do this for NAND at the moment because we need
obsolete dirent nodes to stay on the lists, because of the
horridness in jffs2_garbage_collect_deletion_dirent(). Also
- because we delete the inocache, and on NAND we need that to
+ because we delete the inocache, and on NAND we need that to
stay around until all the nodes are actually erased, in order
to stop us from giving the same inode number to another newly
created inode. */
*p = ref->next_in_ino;
ref->next_in_ino = NULL;
- if (ic->nodes == (void *)ic)
- jffs2_del_ino_cache(c, ic);
-
- spin_unlock(&c->erase_completion_lock);
- }
-
-
- /* Merge with the next node in the physical list, if there is one
- and if it's also obsolete and if it doesn't belong to any inode */
- if (ref->next_phys && ref_obsolete(ref->next_phys) &&
- !ref->next_phys->next_in_ino) {
- struct jffs2_raw_node_ref *n = ref->next_phys;
-
- spin_lock(&c->erase_completion_lock);
-
- ref->__totlen += n->__totlen;
- ref->next_phys = n->next_phys;
- if (jeb->last_node == n) jeb->last_node = ref;
- if (jeb->gc_node == n) {
- /* gc will be happy continuing gc on this node */
- jeb->gc_node=ref;
+ switch (ic->class) {
+#ifdef CONFIG_JFFS2_FS_XATTR
+ case RAWNODE_CLASS_XATTR_DATUM:
+ jffs2_release_xattr_datum(c, (struct jffs2_xattr_datum *)ic);
+ break;
+ case RAWNODE_CLASS_XATTR_REF:
+ jffs2_release_xattr_ref(c, (struct jffs2_xattr_ref *)ic);
+ break;
+#endif
+ default:
+ if (ic->nodes == (void *)ic && ic->nlink == 0)
+ jffs2_del_ino_cache(c, ic);
+ break;
}
spin_unlock(&c->erase_completion_lock);
-
- jffs2_free_raw_node_ref(n);
}
-
- /* Also merge with the previous node in the list, if there is one
- and that one is obsolete */
- if (ref != jeb->first_node ) {
- struct jffs2_raw_node_ref *p = jeb->first_node;
-
- spin_lock(&c->erase_completion_lock);
- while (p->next_phys != ref)
- p = p->next_phys;
-
- if (ref_obsolete(p) && !ref->next_in_ino) {
- p->__totlen += ref->__totlen;
- if (jeb->last_node == ref) {
- jeb->last_node = p;
- }
- if (jeb->gc_node == ref) {
- /* gc will be happy continuing gc on this node */
- jeb->gc_node=p;
- }
- p->next_phys = ref->next_phys;
- jffs2_free_raw_node_ref(ref);
- }
- spin_unlock(&c->erase_completion_lock);
- }
out_erase_sem:
- up(&c->erase_free_sem);
+ mutex_unlock(&c->erase_free_sem);
}
-#if CONFIG_JFFS2_FS_DEBUG >= 2
-void jffs2_dump_block_lists(struct jffs2_sb_info *c)
-{
-
-
- printk(KERN_DEBUG "jffs2_dump_block_lists:\n");
- printk(KERN_DEBUG "flash_size: %08x\n", c->flash_size);
- printk(KERN_DEBUG "used_size: %08x\n", c->used_size);
- printk(KERN_DEBUG "dirty_size: %08x\n", c->dirty_size);
- printk(KERN_DEBUG "wasted_size: %08x\n", c->wasted_size);
- printk(KERN_DEBUG "unchecked_size: %08x\n", c->unchecked_size);
- printk(KERN_DEBUG "free_size: %08x\n", c->free_size);
- printk(KERN_DEBUG "erasing_size: %08x\n", c->erasing_size);
- printk(KERN_DEBUG "bad_size: %08x\n", c->bad_size);
- printk(KERN_DEBUG "sector_size: %08x\n", c->sector_size);
- printk(KERN_DEBUG "jffs2_reserved_blocks size: %08x\n",c->sector_size * c->resv_blocks_write);
-
- if (c->nextblock) {
- printk(KERN_DEBUG "nextblock: %08x (used %08x, dirty %08x, wasted %08x, unchecked %08x, free %08x)\n",
- c->nextblock->offset, c->nextblock->used_size, c->nextblock->dirty_size, c->nextblock->wasted_size, c->nextblock->unchecked_size, c->nextblock->free_size);
- } else {
- printk(KERN_DEBUG "nextblock: NULL\n");
- }
- if (c->gcblock) {
- printk(KERN_DEBUG "gcblock: %08x (used %08x, dirty %08x, wasted %08x, unchecked %08x, free %08x)\n",
- c->gcblock->offset, c->gcblock->used_size, c->gcblock->dirty_size, c->gcblock->wasted_size, c->gcblock->unchecked_size, c->gcblock->free_size);
- } else {
- printk(KERN_DEBUG "gcblock: NULL\n");
- }
- if (list_empty(&c->clean_list)) {
- printk(KERN_DEBUG "clean_list: empty\n");
- } else {
- struct list_head *this;
- int numblocks = 0;
- uint32_t dirty = 0;
-
- list_for_each(this, &c->clean_list) {
- struct jffs2_eraseblock *jeb = list_entry(this, struct jffs2_eraseblock, list);
- numblocks ++;
- dirty += jeb->wasted_size;
- printk(KERN_DEBUG "clean_list: %08x (used %08x, dirty %08x, wasted %08x, unchecked %08x, free %08x)\n", jeb->offset, jeb->used_size, jeb->dirty_size, jeb->wasted_size, jeb->unchecked_size, jeb->free_size);
- }
- printk (KERN_DEBUG "Contains %d blocks with total wasted size %u, average wasted size: %u\n", numblocks, dirty, dirty / numblocks);
- }
- if (list_empty(&c->very_dirty_list)) {
- printk(KERN_DEBUG "very_dirty_list: empty\n");
- } else {
- struct list_head *this;
- int numblocks = 0;
- uint32_t dirty = 0;
-
- list_for_each(this, &c->very_dirty_list) {
- struct jffs2_eraseblock *jeb = list_entry(this, struct jffs2_eraseblock, list);
- numblocks ++;
- dirty += jeb->dirty_size;
- printk(KERN_DEBUG "very_dirty_list: %08x (used %08x, dirty %08x, wasted %08x, unchecked %08x, free %08x)\n",
- jeb->offset, jeb->used_size, jeb->dirty_size, jeb->wasted_size, jeb->unchecked_size, jeb->free_size);
- }
- printk (KERN_DEBUG "Contains %d blocks with total dirty size %u, average dirty size: %u\n",
- numblocks, dirty, dirty / numblocks);
- }
- if (list_empty(&c->dirty_list)) {
- printk(KERN_DEBUG "dirty_list: empty\n");
- } else {
- struct list_head *this;
- int numblocks = 0;
- uint32_t dirty = 0;
-
- list_for_each(this, &c->dirty_list) {
- struct jffs2_eraseblock *jeb = list_entry(this, struct jffs2_eraseblock, list);
- numblocks ++;
- dirty += jeb->dirty_size;
- printk(KERN_DEBUG "dirty_list: %08x (used %08x, dirty %08x, wasted %08x, unchecked %08x, free %08x)\n",
- jeb->offset, jeb->used_size, jeb->dirty_size, jeb->wasted_size, jeb->unchecked_size, jeb->free_size);
- }
- printk (KERN_DEBUG "Contains %d blocks with total dirty size %u, average dirty size: %u\n",
- numblocks, dirty, dirty / numblocks);
- }
- if (list_empty(&c->erasable_list)) {
- printk(KERN_DEBUG "erasable_list: empty\n");
- } else {
- struct list_head *this;
-
- list_for_each(this, &c->erasable_list) {
- struct jffs2_eraseblock *jeb = list_entry(this, struct jffs2_eraseblock, list);
- printk(KERN_DEBUG "erasable_list: %08x (used %08x, dirty %08x, wasted %08x, unchecked %08x, free %08x)\n",
- jeb->offset, jeb->used_size, jeb->dirty_size, jeb->wasted_size, jeb->unchecked_size, jeb->free_size);
- }
- }
- if (list_empty(&c->erasing_list)) {
- printk(KERN_DEBUG "erasing_list: empty\n");
- } else {
- struct list_head *this;
-
- list_for_each(this, &c->erasing_list) {
- struct jffs2_eraseblock *jeb = list_entry(this, struct jffs2_eraseblock, list);
- printk(KERN_DEBUG "erasing_list: %08x (used %08x, dirty %08x, wasted %08x, unchecked %08x, free %08x)\n",
- jeb->offset, jeb->used_size, jeb->dirty_size, jeb->wasted_size, jeb->unchecked_size, jeb->free_size);
- }
- }
- if (list_empty(&c->erase_pending_list)) {
- printk(KERN_DEBUG "erase_pending_list: empty\n");
- } else {
- struct list_head *this;
-
- list_for_each(this, &c->erase_pending_list) {
- struct jffs2_eraseblock *jeb = list_entry(this, struct jffs2_eraseblock, list);
- printk(KERN_DEBUG "erase_pending_list: %08x (used %08x, dirty %08x, wasted %08x, unchecked %08x, free %08x)\n",
- jeb->offset, jeb->used_size, jeb->dirty_size, jeb->wasted_size, jeb->unchecked_size, jeb->free_size);
- }
- }
- if (list_empty(&c->erasable_pending_wbuf_list)) {
- printk(KERN_DEBUG "erasable_pending_wbuf_list: empty\n");
- } else {
- struct list_head *this;
-
- list_for_each(this, &c->erasable_pending_wbuf_list) {
- struct jffs2_eraseblock *jeb = list_entry(this, struct jffs2_eraseblock, list);
- printk(KERN_DEBUG "erasable_pending_wbuf_list: %08x (used %08x, dirty %08x, wasted %08x, unchecked %08x, free %08x)\n",
- jeb->offset, jeb->used_size, jeb->dirty_size, jeb->wasted_size, jeb->unchecked_size, jeb->free_size);
- }
- }
- if (list_empty(&c->free_list)) {
- printk(KERN_DEBUG "free_list: empty\n");
- } else {
- struct list_head *this;
-
- list_for_each(this, &c->free_list) {
- struct jffs2_eraseblock *jeb = list_entry(this, struct jffs2_eraseblock, list);
- printk(KERN_DEBUG "free_list: %08x (used %08x, dirty %08x, wasted %08x, unchecked %08x, free %08x)\n",
- jeb->offset, jeb->used_size, jeb->dirty_size, jeb->wasted_size, jeb->unchecked_size, jeb->free_size);
- }
- }
- if (list_empty(&c->bad_list)) {
- printk(KERN_DEBUG "bad_list: empty\n");
- } else {
- struct list_head *this;
-
- list_for_each(this, &c->bad_list) {
- struct jffs2_eraseblock *jeb = list_entry(this, struct jffs2_eraseblock, list);
- printk(KERN_DEBUG "bad_list: %08x (used %08x, dirty %08x, wasted %08x, unchecked %08x, free %08x)\n",
- jeb->offset, jeb->used_size, jeb->dirty_size, jeb->wasted_size, jeb->unchecked_size, jeb->free_size);
- }
- }
- if (list_empty(&c->bad_used_list)) {
- printk(KERN_DEBUG "bad_used_list: empty\n");
- } else {
- struct list_head *this;
-
- list_for_each(this, &c->bad_used_list) {
- struct jffs2_eraseblock *jeb = list_entry(this, struct jffs2_eraseblock, list);
- printk(KERN_DEBUG "bad_used_list: %08x (used %08x, dirty %08x, wasted %08x, unchecked %08x, free %08x)\n",
- jeb->offset, jeb->used_size, jeb->dirty_size, jeb->wasted_size, jeb->unchecked_size, jeb->free_size);
- }
- }
-}
-#endif /* CONFIG_JFFS2_FS_DEBUG */
-
int jffs2_thread_should_wake(struct jffs2_sb_info *c)
{
int ret = 0;
uint32_t dirty;
+ int nr_very_dirty = 0;
+ struct jffs2_eraseblock *jeb;
if (c->unchecked_size) {
D1(printk(KERN_DEBUG "jffs2_thread_should_wake(): unchecked_size %d, checked_ino #%d\n",
*/
dirty = c->dirty_size + c->erasing_size - c->nr_erasing_blocks * c->sector_size;
- if (c->nr_free_blocks + c->nr_erasing_blocks < c->resv_blocks_gctrigger &&
- (dirty > c->nospc_dirty_size))
+ if (c->nr_free_blocks + c->nr_erasing_blocks < c->resv_blocks_gctrigger &&
+ (dirty > c->nospc_dirty_size))
ret = 1;
- D1(printk(KERN_DEBUG "jffs2_thread_should_wake(): nr_free_blocks %d, nr_erasing_blocks %d, dirty_size 0x%x: %s\n",
- c->nr_free_blocks, c->nr_erasing_blocks, c->dirty_size, ret?"yes":"no"));
+ list_for_each_entry(jeb, &c->very_dirty_list, list) {
+ nr_very_dirty++;
+ if (nr_very_dirty == c->vdirty_blocks_gctrigger) {
+ ret = 1;
+ /* In debug mode, actually go through and count them all */
+ D1(continue);
+ break;
+ }
+ }
+
+ D1(printk(KERN_DEBUG "jffs2_thread_should_wake(): nr_free_blocks %d, nr_erasing_blocks %d, dirty_size 0x%x, vdirty_blocks %d: %s\n",
+ c->nr_free_blocks, c->nr_erasing_blocks, c->dirty_size, nr_very_dirty, ret?"yes":"no"));
return ret;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff