#include <linux/time.h>
#include <linux/capability.h>
#include <linux/fs.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
#include <linux/ext4_fs.h>
-#include <linux/ext4_jbd.h>
+#include <linux/ext4_jbd2.h>
#include <linux/quotaops.h>
#include <linux/buffer_head.h>
* balloc.c contains the blocks allocation and deallocation routines
*/
+/*
+ * Calculate the block group number and offset, given a block number
+ */
+void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr,
+ unsigned long *blockgrpp, ext4_grpblk_t *offsetp)
+{
+ struct ext4_super_block *es = EXT4_SB(sb)->s_es;
+ ext4_grpblk_t offset;
+
+ blocknr = blocknr - le32_to_cpu(es->s_first_data_block);
+ offset = do_div(blocknr, EXT4_BLOCKS_PER_GROUP(sb));
+ if (offsetp)
+ *offsetp = offset;
+ if (blockgrpp)
+ *blockgrpp = blocknr;
+
+}
+
/*
* The free blocks are managed by bitmaps. A file system contains several
* blocks groups. Each group contains 1 bitmap block for blocks, 1 bitmap
* The file system contains group descriptors which are located after the
* super block. Each descriptor contains the number of the bitmap block and
* the free blocks count in the block. The descriptors are loaded in memory
- * when a file system is mounted (see ext4_read_super).
+ * when a file system is mounted (see ext4_fill_super).
*/
return NULL;
}
- desc = (struct ext4_group_desc *) sbi->s_group_desc[group_desc]->b_data;
+ desc = (struct ext4_group_desc *)(
+ (__u8 *)sbi->s_group_desc[group_desc]->b_data +
+ offset * EXT4_DESC_SIZE(sb));
if (bh)
*bh = sbi->s_group_desc[group_desc];
- return desc + offset;
+ return desc;
}
/**
desc = ext4_get_group_desc (sb, block_group, NULL);
if (!desc)
goto error_out;
- bh = sb_bread(sb, le32_to_cpu(desc->bg_block_bitmap));
+ bh = sb_bread(sb, ext4_block_bitmap(sb, desc));
if (!bh)
ext4_error (sb, "read_block_bitmap",
"Cannot read block bitmap - "
- "block_group = %d, block_bitmap = %u",
- block_group, le32_to_cpu(desc->bg_block_bitmap));
+ "block_group = %d, block_bitmap = %llu",
+ block_group,
+ ext4_block_bitmap(sb, desc));
error_out:
return bh;
}
printk("Block Allocation Reservation Windows Map (%s):\n", fn);
while (n) {
- rsv = list_entry(n, struct ext4_reserve_window_node, rsv_node);
+ rsv = rb_entry(n, struct ext4_reserve_window_node, rsv_node);
if (verbose)
printk("reservation window 0x%p "
- "start: %lu, end: %lu\n",
+ "start: %llu, end: %llu\n",
rsv, rsv->rsv_start, rsv->rsv_end);
if (rsv->rsv_start && rsv->rsv_start >= rsv->rsv_end) {
printk("Bad reservation %p (start >= end)\n",
es = sbi->s_es;
if (block < le32_to_cpu(es->s_first_data_block) ||
block + count < block ||
- block + count > le32_to_cpu(es->s_blocks_count)) {
+ block + count > ext4_blocks_count(es)) {
ext4_error (sb, "ext4_free_blocks",
"Freeing blocks not in datazone - "
- "block = "E3FSBLK", count = %lu", block, count);
+ "block = %llu, count = %lu", block, count);
goto error_return;
}
- ext4_debug ("freeing block(s) %lu-%lu\n", block, block + count - 1);
+ ext4_debug ("freeing block(s) %llu-%llu\n", block, block + count - 1);
do_more:
overflow = 0;
- block_group = (block - le32_to_cpu(es->s_first_data_block)) /
- EXT4_BLOCKS_PER_GROUP(sb);
- bit = (block - le32_to_cpu(es->s_first_data_block)) %
- EXT4_BLOCKS_PER_GROUP(sb);
+ ext4_get_group_no_and_offset(sb, block, &block_group, &bit);
/*
* Check to see if we are freeing blocks across a group
* boundary.
if (!desc)
goto error_return;
- if (in_range (le32_to_cpu(desc->bg_block_bitmap), block, count) ||
- in_range (le32_to_cpu(desc->bg_inode_bitmap), block, count) ||
- in_range (block, le32_to_cpu(desc->bg_inode_table),
- sbi->s_itb_per_group) ||
- in_range (block + count - 1, le32_to_cpu(desc->bg_inode_table),
- sbi->s_itb_per_group))
+ if (in_range(ext4_block_bitmap(sb, desc), block, count) ||
+ in_range(ext4_inode_bitmap(sb, desc), block, count) ||
+ in_range(block, ext4_inode_table(sb, desc), sbi->s_itb_per_group) ||
+ in_range(block + count - 1, ext4_inode_table(sb, desc),
+ sbi->s_itb_per_group))
ext4_error (sb, "ext4_free_blocks",
"Freeing blocks in system zones - "
- "Block = "E3FSBLK", count = %lu",
+ "Block = %llu, count = %lu",
block, count);
/*
* transaction.
*
* Ideally we would want to allow that to happen, but to
- * do so requires making journal_forget() capable of
+ * do so requires making jbd2_journal_forget() capable of
* revoking the queued write of a data block, which
* implies blocking on the journal lock. *forget()
* cannot block due to truncate races.
*
- * Eventually we can fix this by making journal_forget()
+ * Eventually we can fix this by making jbd2_journal_forget()
* return a status indicating whether or not it was able
* to revoke the buffer. On successful revoke, it is
* safe not to set the allocation bit in the committed
bit + i, bitmap_bh->b_data)) {
jbd_unlock_bh_state(bitmap_bh);
ext4_error(sb, __FUNCTION__,
- "bit already cleared for block "E3FSBLK,
- block + i);
+ "bit already cleared for block %llu",
+ (ext4_fsblk_t)(block + i));
jbd_lock_bh_state(bitmap_bh);
BUFFER_TRACE(bitmap_bh, "bit already cleared");
} else {
here = 0;
p = ((char *)bh->b_data) + (here >> 3);
- r = memscan(p, 0, (maxblocks - here + 7) >> 3);
+ r = memscan(p, 0, ((maxblocks + 7) >> 3) - (here >> 3));
next = (r - ((char *)bh->b_data)) << 3;
if (next < maxblocks && next >= start && ext4_test_allocatable(next, bh))
prev = rsv;
next = rb_next(&rsv->rsv_node);
- rsv = list_entry(next,struct ext4_reserve_window_node,rsv_node);
+ rsv = rb_entry(next,struct ext4_reserve_window_node,rsv_node);
/*
* Reached the last reservation, we can just append to the
* check if the first free block is within the
* free space we just reserved
*/
- if (start_block >= my_rsv->rsv_start && start_block < my_rsv->rsv_end)
+ if (start_block >= my_rsv->rsv_start && start_block <= my_rsv->rsv_end)
return 0; /* success */
/*
* if the first free bit we found is out of the reservable space
if (!next)
my_rsv->rsv_end += size;
else {
- next_rsv = list_entry(next, struct ext4_reserve_window_node, rsv_node);
+ next_rsv = rb_entry(next, struct ext4_reserve_window_node, rsv_node);
if ((next_rsv->rsv_start - my_rsv->rsv_end - 1) >= size)
my_rsv->rsv_end += size;
}
/*
* grp_goal is a group relative block number (if there is a goal)
- * 0 < grp_goal < EXT4_BLOCKS_PER_GROUP(sb)
+ * 0 <= grp_goal < EXT4_BLOCKS_PER_GROUP(sb)
* first block is a filesystem wide block number
* first block is the block number of the first block in this group
*/
if (!goal_in_my_reservation(&my_rsv->rsv_window,
grp_goal, group, sb))
grp_goal = -1;
- } else if (grp_goal > 0 &&
- (my_rsv->rsv_end-grp_goal+1) < *count)
- try_to_extend_reservation(my_rsv, sb,
- *count-my_rsv->rsv_end + grp_goal - 1);
+ } else if (grp_goal >= 0) {
+ int curr = my_rsv->rsv_end -
+ (grp_goal + group_first_block) + 1;
+
+ if (curr < *count)
+ try_to_extend_reservation(my_rsv, sb,
+ *count - curr);
+ }
if ((my_rsv->rsv_start > group_last_block) ||
(my_rsv->rsv_end < group_first_block)) {
ext4_fsblk_t free_blocks, root_blocks;
free_blocks = percpu_counter_read_positive(&sbi->s_freeblocks_counter);
- root_blocks = le32_to_cpu(sbi->s_es->s_r_blocks_count);
+ root_blocks = ext4_r_blocks_count(sbi->s_es);
if (free_blocks < root_blocks + 1 && !capable(CAP_SYS_RESOURCE) &&
sbi->s_resuid != current->fsuid &&
(sbi->s_resgid == 0 || !in_group_p (sbi->s_resgid))) {
jbd_debug(1, "%s: retrying operation after ENOSPC\n", sb->s_id);
- return journal_force_commit_nested(EXT4_SB(sb)->s_journal);
+ return jbd2_journal_force_commit_nested(EXT4_SB(sb)->s_journal);
}
/**
{
struct buffer_head *bitmap_bh = NULL;
struct buffer_head *gdp_bh;
- int group_no;
+ unsigned long group_no;
int goal_group;
ext4_grpblk_t grp_target_blk; /* blockgroup relative goal block */
ext4_grpblk_t grp_alloc_blk; /* blockgroup-relative allocated block*/
* First, test whether the goal block is free.
*/
if (goal < le32_to_cpu(es->s_first_data_block) ||
- goal >= le32_to_cpu(es->s_blocks_count))
+ goal >= ext4_blocks_count(es))
goal = le32_to_cpu(es->s_first_data_block);
- group_no = (goal - le32_to_cpu(es->s_first_data_block)) /
- EXT4_BLOCKS_PER_GROUP(sb);
+ ext4_get_group_no_and_offset(sb, goal, &group_no, &grp_target_blk);
goal_group = group_no;
retry_alloc:
gdp = ext4_get_group_desc(sb, group_no, &gdp_bh);
my_rsv = NULL;
if (free_blocks > 0) {
- grp_target_blk = ((goal - le32_to_cpu(es->s_first_data_block)) %
- EXT4_BLOCKS_PER_GROUP(sb));
bitmap_bh = read_block_bitmap(sb, group_no);
if (!bitmap_bh)
goto io_error;
if (group_no >= ngroups)
group_no = 0;
gdp = ext4_get_group_desc(sb, group_no, &gdp_bh);
- if (!gdp) {
- *errp = -EIO;
- goto out;
- }
+ if (!gdp)
+ goto io_error;
free_blocks = le16_to_cpu(gdp->bg_free_blocks_count);
/*
* skip this group if the number of
*/
if (my_rsv) {
my_rsv = NULL;
+ windowsz = 0;
group_no = goal_group;
goto retry_alloc;
}
ret_block = grp_alloc_blk + ext4_group_first_block_no(sb, group_no);
- if (in_range(le32_to_cpu(gdp->bg_block_bitmap), ret_block, num) ||
- in_range(le32_to_cpu(gdp->bg_inode_bitmap), ret_block, num) ||
- in_range(ret_block, le32_to_cpu(gdp->bg_inode_table),
- EXT4_SB(sb)->s_itb_per_group) ||
- in_range(ret_block + num - 1, le32_to_cpu(gdp->bg_inode_table),
- EXT4_SB(sb)->s_itb_per_group))
+ if (in_range(ext4_block_bitmap(sb, gdp), ret_block, num) ||
+ in_range(ext4_block_bitmap(sb, gdp), ret_block, num) ||
+ in_range(ret_block, ext4_inode_table(sb, gdp),
+ EXT4_SB(sb)->s_itb_per_group) ||
+ in_range(ret_block + num - 1, ext4_inode_table(sb, gdp),
+ EXT4_SB(sb)->s_itb_per_group))
ext4_error(sb, "ext4_new_block",
"Allocating block in system zone - "
- "blocks from "E3FSBLK", length %lu",
+ "blocks from %llu, length %lu",
ret_block, num);
performed_allocation = 1;
jbd_unlock_bh_state(bitmap_bh);
#endif
- if (ret_block + num - 1 >= le32_to_cpu(es->s_blocks_count)) {
+ if (ret_block + num - 1 >= ext4_blocks_count(es)) {
ext4_error(sb, "ext4_new_block",
- "block("E3FSBLK") >= blocks count(%d) - "
- "block_group = %d, es == %p ", ret_block,
- le32_to_cpu(es->s_blocks_count), group_no, es);
+ "block(%llu) >= blocks count(%llu) - "
+ "block_group = %lu, es == %p ", ret_block,
+ ext4_blocks_count(es), group_no, es);
goto out;
}
bitmap_count += x;
}
brelse(bitmap_bh);
- printk("ext4_count_free_blocks: stored = "E3FSBLK
- ", computed = "E3FSBLK", "E3FSBLK"\n",
- le32_to_cpu(es->s_free_blocks_count),
+ printk("ext4_count_free_blocks: stored = %llu"
+ ", computed = %llu, %llu\n",
+ EXT4_FREE_BLOCKS_COUNT(es),
desc_count, bitmap_count);
return bitmap_count;
#else
static inline int
block_in_use(ext4_fsblk_t block, struct super_block *sb, unsigned char *map)
{
- return ext4_test_bit ((block -
- le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block)) %
- EXT4_BLOCKS_PER_GROUP(sb), map);
+ ext4_grpblk_t offset;
+
+ ext4_get_group_no_and_offset(sb, block, NULL, &offset);
+ return ext4_test_bit (offset, map);
}
static inline int test_root(int a, int b)
projects / firefly-linux-kernel-4.4.55.git / blobdiff