static inline int mb_find_next_zero_bit(void *addr, int max, int start)
{
- int fix = 0;
+ int fix = 0, ret, tmpmax;
addr = mb_correct_addr_and_bit(&fix, addr);
- max += fix;
+ tmpmax = max + fix;
start += fix;
- return ext4_find_next_zero_bit(addr, max, start) - fix;
+ ret = ext4_find_next_zero_bit(addr, tmpmax, start) - fix;
+ if (ret > max)
+ return max;
+ return ret;
}
static inline int mb_find_next_bit(void *addr, int max, int start)
{
- int fix = 0;
+ int fix = 0, ret, tmpmax;
addr = mb_correct_addr_and_bit(&fix, addr);
- max += fix;
+ tmpmax = max + fix;
start += fix;
- return ext4_find_next_bit(addr, max, start) - fix;
+ ret = ext4_find_next_bit(addr, tmpmax, start) - fix;
+ if (ret > max)
+ return max;
+ return ret;
}
static void *mb_find_buddy(struct ext4_buddy *e4b, int order, int *max)
if (!buffer_uptodate(bh[i]))
goto out;
+ err = 0;
first_block = page->index * blocks_per_page;
for (i = 0; i < blocks_per_page; i++) {
int group;
ac->ac_g_ex.fe_start = sbi->s_mb_last_start;
spin_unlock(&sbi->s_md_lock);
}
-
- /* searching for the right group start from the goal value specified */
- group = ac->ac_g_ex.fe_group;
-
/* Let's just scan groups to find more-less suitable blocks */
cr = ac->ac_2order ? 0 : 1;
/*
repeat:
for (; cr < 4 && ac->ac_status == AC_STATUS_CONTINUE; cr++) {
ac->ac_criteria = cr;
+ /*
+ * searching for the right group start
+ * from the goal value specified
+ */
+ group = ac->ac_g_ex.fe_group;
+
for (i = 0; i < EXT4_SB(sb)->s_groups_count; group++, i++) {
struct ext4_group_info *grp;
struct ext4_group_desc *desc;
-#define MB_PROC_VALUE_READ(name) \
-static int ext4_mb_read_##name(char *page, char **start, \
- off_t off, int count, int *eof, void *data) \
+#define MB_PROC_FOPS(name) \
+static int ext4_mb_##name##_proc_show(struct seq_file *m, void *v) \
{ \
- struct ext4_sb_info *sbi = data; \
- int len; \
- *eof = 1; \
- if (off != 0) \
- return 0; \
- len = sprintf(page, "%ld\n", sbi->s_mb_##name); \
- *start = page; \
- return len; \
-}
-
-#define MB_PROC_VALUE_WRITE(name) \
-static int ext4_mb_write_##name(struct file *file, \
- const char __user *buf, unsigned long cnt, void *data) \
+ struct ext4_sb_info *sbi = m->private; \
+ \
+ seq_printf(m, "%ld\n", sbi->s_mb_##name); \
+ return 0; \
+} \
+ \
+static int ext4_mb_##name##_proc_open(struct inode *inode, struct file *file)\
{ \
- struct ext4_sb_info *sbi = data; \
+ return single_open(file, ext4_mb_##name##_proc_show, PDE(inode)->data);\
+} \
+ \
+static ssize_t ext4_mb_##name##_proc_write(struct file *file, \
+ const char __user *buf, size_t cnt, loff_t *ppos) \
+{ \
+ struct ext4_sb_info *sbi = PDE(file->f_path.dentry->d_inode)->data;\
char str[32]; \
long value; \
if (cnt >= sizeof(str)) \
return -ERANGE; \
sbi->s_mb_##name = value; \
return cnt; \
-}
+} \
+ \
+static const struct file_operations ext4_mb_##name##_proc_fops = { \
+ .owner = THIS_MODULE, \
+ .open = ext4_mb_##name##_proc_open, \
+ .read = seq_read, \
+ .llseek = seq_lseek, \
+ .release = single_release, \
+ .write = ext4_mb_##name##_proc_write, \
+};
-MB_PROC_VALUE_READ(stats);
-MB_PROC_VALUE_WRITE(stats);
-MB_PROC_VALUE_READ(max_to_scan);
-MB_PROC_VALUE_WRITE(max_to_scan);
-MB_PROC_VALUE_READ(min_to_scan);
-MB_PROC_VALUE_WRITE(min_to_scan);
-MB_PROC_VALUE_READ(order2_reqs);
-MB_PROC_VALUE_WRITE(order2_reqs);
-MB_PROC_VALUE_READ(stream_request);
-MB_PROC_VALUE_WRITE(stream_request);
-MB_PROC_VALUE_READ(group_prealloc);
-MB_PROC_VALUE_WRITE(group_prealloc);
+MB_PROC_FOPS(stats);
+MB_PROC_FOPS(max_to_scan);
+MB_PROC_FOPS(min_to_scan);
+MB_PROC_FOPS(order2_reqs);
+MB_PROC_FOPS(stream_request);
+MB_PROC_FOPS(group_prealloc);
#define MB_PROC_HANDLER(name, var) \
do { \
- proc = create_proc_entry(name, mode, sbi->s_mb_proc); \
+ proc = proc_create_data(name, mode, sbi->s_mb_proc, \
+ &ext4_mb_##var##_proc_fops, sbi); \
if (proc == NULL) { \
printk(KERN_ERR "EXT4-fs: can't to create %s\n", name); \
goto err_out; \
} \
- proc->data = sbi; \
- proc->read_proc = ext4_mb_read_##var ; \
- proc->write_proc = ext4_mb_write_##var; \
} while (0)
static int ext4_mb_init_per_dev_proc(struct super_block *sb)
struct proc_dir_entry *proc;
char devname[64];
- snprintf(devname, sizeof(devname) - 1, "%s",
- bdevname(sb->s_bdev, devname));
+ bdevname(sb->s_bdev, devname);
sbi->s_mb_proc = proc_mkdir(devname, proc_root_ext4);
MB_PROC_HANDLER(EXT4_MB_STATS_NAME, stats);
if (sbi->s_mb_proc == NULL)
return -EINVAL;
- snprintf(devname, sizeof(devname) - 1, "%s",
- bdevname(sb->s_bdev, devname));
+ bdevname(sb->s_bdev, devname);
remove_proc_entry(EXT4_MB_GROUP_PREALLOC, sbi->s_mb_proc);
remove_proc_entry(EXT4_MB_STREAM_REQ, sbi->s_mb_proc);
remove_proc_entry(EXT4_MB_ORDER2_REQ, sbi->s_mb_proc);
struct ext4_sb_info *sbi;
struct super_block *sb;
ext4_fsblk_t block;
- int err;
+ int err, len;
BUG_ON(ac->ac_status != AC_STATUS_FOUND);
BUG_ON(ac->ac_b_ex.fe_len <= 0);
sbi = EXT4_SB(sb);
es = sbi->s_es;
- ext4_debug("using block group %lu(%d)\n", ac->ac_b_ex.fe_group,
- gdp->bg_free_blocks_count);
err = -EIO;
bitmap_bh = read_block_bitmap(sb, ac->ac_b_ex.fe_group);
if (!gdp)
goto out_err;
+ ext4_debug("using block group %lu(%d)\n", ac->ac_b_ex.fe_group,
+ gdp->bg_free_blocks_count);
+
err = ext4_journal_get_write_access(handle, gdp_bh);
if (err)
goto out_err;
+ ac->ac_b_ex.fe_start
+ le32_to_cpu(es->s_first_data_block);
- if (block == ext4_block_bitmap(sb, gdp) ||
- block == ext4_inode_bitmap(sb, gdp) ||
- in_range(block, ext4_inode_table(sb, gdp),
- EXT4_SB(sb)->s_itb_per_group)) {
-
+ len = ac->ac_b_ex.fe_len;
+ if (in_range(ext4_block_bitmap(sb, gdp), block, len) ||
+ in_range(ext4_inode_bitmap(sb, gdp), block, len) ||
+ in_range(block, ext4_inode_table(sb, gdp),
+ EXT4_SB(sb)->s_itb_per_group) ||
+ in_range(block + len - 1, ext4_inode_table(sb, gdp),
+ EXT4_SB(sb)->s_itb_per_group)) {
ext4_error(sb, __func__,
"Allocating block in system zone - block = %llu",
block);
+ /* File system mounted not to panic on error
+ * Fix the bitmap and repeat the block allocation
+ * We leak some of the blocks here.
+ */
+ mb_set_bits(sb_bgl_lock(sbi, ac->ac_b_ex.fe_group),
+ bitmap_bh->b_data, ac->ac_b_ex.fe_start,
+ ac->ac_b_ex.fe_len);
+ err = ext4_journal_dirty_metadata(handle, bitmap_bh);
+ if (!err)
+ err = -EAGAIN;
+ goto out_err;
}
#ifdef AGGRESSIVE_CHECK
{
if (size < i_size_read(ac->ac_inode))
size = i_size_read(ac->ac_inode);
- /* max available blocks in a free group */
- max = EXT4_BLOCKS_PER_GROUP(ac->ac_sb) - 1 - 1 -
- EXT4_SB(ac->ac_sb)->s_itb_per_group;
+ /* max size of free chunks */
+ max = 2 << bsbits;
-#define NRL_CHECK_SIZE(req, size, max,bits) \
- (req <= (size) || max <= ((size) >> bits))
+#define NRL_CHECK_SIZE(req, size, max, chunk_size) \
+ (req <= (size) || max <= (chunk_size))
/* first, try to predict filesize */
/* XXX: should this table be tunable? */
size = 512 * 1024;
} else if (size <= 1024 * 1024) {
size = 1024 * 1024;
- } else if (NRL_CHECK_SIZE(size, 4 * 1024 * 1024, max, bsbits)) {
+ } else if (NRL_CHECK_SIZE(size, 4 * 1024 * 1024, max, 2 * 1024)) {
start_off = ((loff_t)ac->ac_o_ex.fe_logical >>
- (20 - bsbits)) << 20;
- size = 1024 * 1024;
- } else if (NRL_CHECK_SIZE(size, 8 * 1024 * 1024, max, bsbits)) {
+ (21 - bsbits)) << 21;
+ size = 2 * 1024 * 1024;
+ } else if (NRL_CHECK_SIZE(size, 8 * 1024 * 1024, max, 4 * 1024)) {
start_off = ((loff_t)ac->ac_o_ex.fe_logical >>
(22 - bsbits)) << 22;
size = 4 * 1024 * 1024;
} else if (NRL_CHECK_SIZE(ac->ac_o_ex.fe_len,
- (8<<20)>>bsbits, max, bsbits)) {
+ (8<<20)>>bsbits, max, 8 * 1024)) {
start_off = ((loff_t)ac->ac_o_ex.fe_logical >>
(23 - bsbits)) << 23;
size = 8 * 1024 * 1024;
static void ext4_mb_use_group_pa(struct ext4_allocation_context *ac,
struct ext4_prealloc_space *pa)
{
- unsigned len = ac->ac_o_ex.fe_len;
-
+ unsigned int len = ac->ac_o_ex.fe_len;
ext4_get_group_no_and_offset(ac->ac_sb, pa->pa_pstart,
&ac->ac_b_ex.fe_group,
&ac->ac_b_ex.fe_start);
if (bit >= end)
break;
next = mb_find_next_bit(bitmap_bh->b_data, end, bit);
- if (next > end)
- next = end;
start = group * EXT4_BLOCKS_PER_GROUP(sb) + bit +
le32_to_cpu(sbi->s_es->s_first_data_block);
mb_debug(" free preallocated %u/%u in group %u\n",
ac->ac_op = EXT4_MB_HISTORY_ALLOC;
ext4_mb_normalize_request(ac, ar);
-
repeat:
/* allocate space in core */
ext4_mb_regular_allocator(ac);
}
if (likely(ac->ac_status == AC_STATUS_FOUND)) {
- ext4_mb_mark_diskspace_used(ac, handle);
- *errp = 0;
- block = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);
- ar->len = ac->ac_b_ex.fe_len;
+ *errp = ext4_mb_mark_diskspace_used(ac, handle);
+ if (*errp == -EAGAIN) {
+ ac->ac_b_ex.fe_group = 0;
+ ac->ac_b_ex.fe_start = 0;
+ ac->ac_b_ex.fe_len = 0;
+ ac->ac_status = AC_STATUS_CONTINUE;
+ goto repeat;
+ } else if (*errp) {
+ ac->ac_b_ex.fe_len = 0;
+ ar->len = 0;
+ ext4_mb_show_ac(ac);
+ } else {
+ block = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);
+ ar->len = ac->ac_b_ex.fe_len;
+ }
} else {
freed = ext4_mb_discard_preallocations(sb, ac->ac_o_ex.fe_len);
if (freed)
ext4_error(sb, __func__,
"Freeing blocks in system zone - "
"Block = %lu, count = %lu", block, count);
+ /* err = 0. ext4_std_error should be a no op */
+ goto error_return;
}
BUFFER_TRACE(bitmap_bh, "getting write access");
projects / linux-2.6 / blobdiff