struct ubifs_gced_idx_leb *idx_gc;
long long available, outstanding, free;
- ubifs_assert(spin_is_locked(&c->space_lock));
+ spin_lock(&c->space_lock);
spin_lock(&dbg_lock);
printk(KERN_DEBUG "(pid %d) Budgeting info: budg_data_growth %lld, "
"budg_dd_growth %lld, budg_idx_growth %lld\n", current->pid,
- c->budg_data_growth, c->budg_dd_growth, c->budg_idx_growth);
+ c->bi.data_growth, c->bi.dd_growth, c->bi.idx_growth);
printk(KERN_DEBUG "\tdata budget sum %lld, total budget sum %lld, "
- "freeable_cnt %d\n", c->budg_data_growth + c->budg_dd_growth,
- c->budg_data_growth + c->budg_dd_growth + c->budg_idx_growth,
+ "freeable_cnt %d\n", c->bi.data_growth + c->bi.dd_growth,
+ c->bi.data_growth + c->bi.dd_growth + c->bi.idx_growth,
c->freeable_cnt);
printk(KERN_DEBUG "\tmin_idx_lebs %d, old_idx_sz %lld, "
- "calc_idx_sz %lld, idx_gc_cnt %d\n", c->min_idx_lebs,
- c->old_idx_sz, c->calc_idx_sz, c->idx_gc_cnt);
+ "calc_idx_sz %lld, idx_gc_cnt %d\n", c->bi.min_idx_lebs,
+ c->bi.old_idx_sz, c->calc_idx_sz, c->idx_gc_cnt);
printk(KERN_DEBUG "\tdirty_pg_cnt %ld, dirty_zn_cnt %ld, "
"clean_zn_cnt %ld\n", atomic_long_read(&c->dirty_pg_cnt),
atomic_long_read(&c->dirty_zn_cnt),
printk(KERN_DEBUG "\tcommit state %d\n", c->cmt_state);
/* Print budgeting predictions */
- available = ubifs_calc_available(c, c->min_idx_lebs);
- outstanding = c->budg_data_growth + c->budg_dd_growth;
+ available = ubifs_calc_available(c, c->bi.min_idx_lebs);
+ outstanding = c->bi.data_growth + c->bi.dd_growth;
free = ubifs_get_free_space_nolock(c);
printk(KERN_DEBUG "Budgeting predictions:\n");
printk(KERN_DEBUG "\tavailable: %lld, outstanding %lld, free %lld\n",
available, outstanding, free);
spin_unlock(&dbg_lock);
+ spin_unlock(&c->space_lock);
}
void dbg_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp)
void dbg_save_space_info(struct ubifs_info *c)
{
struct ubifs_debug_info *d = c->dbg;
-
- ubifs_get_lp_stats(c, &d->saved_lst);
+ int freeable_cnt;
spin_lock(&c->space_lock);
+ memcpy(&d->saved_lst, &c->lst, sizeof(struct ubifs_lp_stats));
+
+ /*
+ * We use a dirty hack here and zero out @c->freeable_cnt, because it
+ * affects the free space calculations, and UBIFS might not know about
+ * all freeable eraseblocks. Indeed, we know about freeable eraseblocks
+ * only when we read their lprops, and we do this only lazily, upon the
+ * need. So at any given point of time @c->freeable_cnt might be not
+ * exactly accurate.
+ *
+ * Just one example about the issue we hit when we did not zero
+ * @c->freeable_cnt.
+ * 1. The file-system is mounted R/O, c->freeable_cnt is %0. We save the
+ * amount of free space in @d->saved_free
+ * 2. We re-mount R/W, which makes UBIFS to read the "lsave"
+ * information from flash, where we cache LEBs from various
+ * categories ('ubifs_remount_fs()' -> 'ubifs_lpt_init()'
+ * -> 'lpt_init_wr()' -> 'read_lsave()' -> 'ubifs_lpt_lookup()'
+ * -> 'ubifs_get_pnode()' -> 'update_cats()'
+ * -> 'ubifs_add_to_cat()').
+ * 3. Lsave contains a freeable eraseblock, and @c->freeable_cnt
+ * becomes %1.
+ * 4. We calculate the amount of free space when the re-mount is
+ * finished in 'dbg_check_space_info()' and it does not match
+ * @d->saved_free.
+ */
+ freeable_cnt = c->freeable_cnt;
+ c->freeable_cnt = 0;
d->saved_free = ubifs_get_free_space_nolock(c);
+ c->freeable_cnt = freeable_cnt;
spin_unlock(&c->space_lock);
}
{
struct ubifs_debug_info *d = c->dbg;
struct ubifs_lp_stats lst;
- long long avail, free;
+ long long free;
+ int freeable_cnt;
spin_lock(&c->space_lock);
- avail = ubifs_calc_available(c, c->min_idx_lebs);
+ freeable_cnt = c->freeable_cnt;
+ c->freeable_cnt = 0;
+ free = ubifs_get_free_space_nolock(c);
+ c->freeable_cnt = freeable_cnt;
spin_unlock(&c->space_lock);
- free = ubifs_get_free_space(c);
if (free != d->saved_free) {
ubifs_err("free space changed from %lld to %lld",
ubifs_msg("current lprops statistics dump");
dbg_dump_lstats(&lst);
-
- spin_lock(&c->space_lock);
dbg_dump_budg(c);
- spin_unlock(&c->space_lock);
dump_stack();
return -EINVAL;
}
hashb = key_block(c, &sb->key);
if (hasha > hashb) {
- ubifs_err("larger hash %u goes before %u", hasha, hashb);
+ ubifs_err("larger hash %u goes before %u",
+ hasha, hashb);
goto error_dump;
}
}
static int open_debugfs_file(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
- return 0;
+ return nonseekable_open(inode, file);
}
static ssize_t write_debugfs_file(struct file *file, const char __user *buf,
if (file->f_path.dentry == d->dfs_dump_lprops)
dbg_dump_lprops(c);
- else if (file->f_path.dentry == d->dfs_dump_budg) {
- spin_lock(&c->space_lock);
+ else if (file->f_path.dentry == d->dfs_dump_budg)
dbg_dump_budg(c);
- spin_unlock(&c->space_lock);
- } else if (file->f_path.dentry == d->dfs_dump_tnc) {
+ else if (file->f_path.dentry == d->dfs_dump_tnc) {
mutex_lock(&c->tnc_mutex);
dbg_dump_tnc(c);
mutex_unlock(&c->tnc_mutex);
.open = open_debugfs_file,
.write = write_debugfs_file,
.owner = THIS_MODULE,
- .llseek = default_llseek,
+ .llseek = no_llseek,
};
/**
sprintf(d->dfs_dir_name, "ubi%d_%d", c->vi.ubi_num, c->vi.vol_id);
fname = d->dfs_dir_name;
dent = debugfs_create_dir(fname, dfs_rootdir);
- if (IS_ERR(dent))
+ if (IS_ERR_OR_NULL(dent))
goto out;
d->dfs_dir = dent;
fname = "dump_lprops";
dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c, &dfs_fops);
- if (IS_ERR(dent))
+ if (IS_ERR_OR_NULL(dent))
goto out_remove;
d->dfs_dump_lprops = dent;
fname = "dump_budg";
dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c, &dfs_fops);
- if (IS_ERR(dent))
+ if (IS_ERR_OR_NULL(dent))
goto out_remove;
d->dfs_dump_budg = dent;
fname = "dump_tnc";
dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c, &dfs_fops);
- if (IS_ERR(dent))
+ if (IS_ERR_OR_NULL(dent))
goto out_remove;
d->dfs_dump_tnc = dent;
out_remove:
debugfs_remove_recursive(d->dfs_dir);
out:
- err = PTR_ERR(dent);
+ err = dent ? PTR_ERR(dent) : -ENODEV;
ubifs_err("cannot create \"%s\" debugfs directory, error %d\n",
fname, err);
return err;
git.openpandora.org / pandora-kernel.git / blobdiff