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Diffstat (limited to 'fs/btrfs/extent_io.c')
-rw-r--r--fs/btrfs/extent_io.c188
1 files changed, 130 insertions, 58 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index e2357e31609a..9abe18763a7f 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -96,8 +96,8 @@ static inline void __btrfs_debug_check_extent_io_range(const char *caller,
inode = tree->mapping->host;
isize = i_size_read(inode);
if (end >= PAGE_SIZE && (end % 2) == 0 && end != isize - 1) {
- printk_ratelimited(KERN_DEBUG
- "BTRFS: %s: ino %llu isize %llu odd range [%llu,%llu]\n",
+ btrfs_debug_rl(BTRFS_I(inode)->root->fs_info,
+ "%s: ino %llu isize %llu odd range [%llu,%llu]",
caller, btrfs_ino(inode), isize, start, end);
}
}
@@ -131,6 +131,25 @@ struct extent_page_data {
unsigned int sync_io:1;
};
+static void add_extent_changeset(struct extent_state *state, unsigned bits,
+ struct extent_changeset *changeset,
+ int set)
+{
+ int ret;
+
+ if (!changeset)
+ return;
+ if (set && (state->state & bits) == bits)
+ return;
+ if (!set && (state->state & bits) == 0)
+ return;
+ changeset->bytes_changed += state->end - state->start + 1;
+ ret = ulist_add(changeset->range_changed, state->start, state->end,
+ GFP_ATOMIC);
+ /* ENOMEM */
+ BUG_ON(ret < 0);
+}
+
static noinline void flush_write_bio(void *data);
static inline struct btrfs_fs_info *
tree_fs_info(struct extent_io_tree *tree)
@@ -410,7 +429,8 @@ static void clear_state_cb(struct extent_io_tree *tree,
}
static void set_state_bits(struct extent_io_tree *tree,
- struct extent_state *state, unsigned *bits);
+ struct extent_state *state, unsigned *bits,
+ struct extent_changeset *changeset);
/*
* insert an extent_state struct into the tree. 'bits' are set on the
@@ -426,7 +446,7 @@ static int insert_state(struct extent_io_tree *tree,
struct extent_state *state, u64 start, u64 end,
struct rb_node ***p,
struct rb_node **parent,
- unsigned *bits)
+ unsigned *bits, struct extent_changeset *changeset)
{
struct rb_node *node;
@@ -436,7 +456,7 @@ static int insert_state(struct extent_io_tree *tree,
state->start = start;
state->end = end;
- set_state_bits(tree, state, bits);
+ set_state_bits(tree, state, bits, changeset);
node = tree_insert(&tree->state, NULL, end, &state->rb_node, p, parent);
if (node) {
@@ -511,7 +531,8 @@ static struct extent_state *next_state(struct extent_state *state)
*/
static struct extent_state *clear_state_bit(struct extent_io_tree *tree,
struct extent_state *state,
- unsigned *bits, int wake)
+ unsigned *bits, int wake,
+ struct extent_changeset *changeset)
{
struct extent_state *next;
unsigned bits_to_clear = *bits & ~EXTENT_CTLBITS;
@@ -522,6 +543,7 @@ static struct extent_state *clear_state_bit(struct extent_io_tree *tree,
tree->dirty_bytes -= range;
}
clear_state_cb(tree, state, bits);
+ add_extent_changeset(state, bits_to_clear, changeset, 0);
state->state &= ~bits_to_clear;
if (wake)
wake_up(&state->wq);
@@ -569,10 +591,10 @@ static void extent_io_tree_panic(struct extent_io_tree *tree, int err)
*
* This takes the tree lock, and returns 0 on success and < 0 on error.
*/
-int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
- unsigned bits, int wake, int delete,
- struct extent_state **cached_state,
- gfp_t mask)
+static int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
+ unsigned bits, int wake, int delete,
+ struct extent_state **cached_state,
+ gfp_t mask, struct extent_changeset *changeset)
{
struct extent_state *state;
struct extent_state *cached;
@@ -594,7 +616,7 @@ int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
if (bits & (EXTENT_IOBITS | EXTENT_BOUNDARY))
clear = 1;
again:
- if (!prealloc && (mask & __GFP_WAIT)) {
+ if (!prealloc && gfpflags_allow_blocking(mask)) {
/*
* Don't care for allocation failure here because we might end
* up not needing the pre-allocated extent state at all, which
@@ -671,7 +693,8 @@ hit_next:
if (err)
goto out;
if (state->end <= end) {
- state = clear_state_bit(tree, state, &bits, wake);
+ state = clear_state_bit(tree, state, &bits, wake,
+ changeset);
goto next;
}
goto search_again;
@@ -692,13 +715,13 @@ hit_next:
if (wake)
wake_up(&state->wq);
- clear_state_bit(tree, prealloc, &bits, wake);
+ clear_state_bit(tree, prealloc, &bits, wake, changeset);
prealloc = NULL;
goto out;
}
- state = clear_state_bit(tree, state, &bits, wake);
+ state = clear_state_bit(tree, state, &bits, wake, changeset);
next:
if (last_end == (u64)-1)
goto out;
@@ -718,7 +741,7 @@ search_again:
if (start > end)
goto out;
spin_unlock(&tree->lock);
- if (mask & __GFP_WAIT)
+ if (gfpflags_allow_blocking(mask))
cond_resched();
goto again;
}
@@ -789,7 +812,7 @@ out:
static void set_state_bits(struct extent_io_tree *tree,
struct extent_state *state,
- unsigned *bits)
+ unsigned *bits, struct extent_changeset *changeset)
{
unsigned bits_to_set = *bits & ~EXTENT_CTLBITS;
@@ -798,6 +821,7 @@ static void set_state_bits(struct extent_io_tree *tree,
u64 range = state->end - state->start + 1;
tree->dirty_bytes += range;
}
+ add_extent_changeset(state, bits_to_set, changeset, 1);
state->state |= bits_to_set;
}
@@ -835,7 +859,7 @@ static int __must_check
__set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, unsigned exclusive_bits,
u64 *failed_start, struct extent_state **cached_state,
- gfp_t mask)
+ gfp_t mask, struct extent_changeset *changeset)
{
struct extent_state *state;
struct extent_state *prealloc = NULL;
@@ -850,7 +874,7 @@ __set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
bits |= EXTENT_FIRST_DELALLOC;
again:
- if (!prealloc && (mask & __GFP_WAIT)) {
+ if (!prealloc && gfpflags_allow_blocking(mask)) {
prealloc = alloc_extent_state(mask);
BUG_ON(!prealloc);
}
@@ -873,7 +897,7 @@ again:
prealloc = alloc_extent_state_atomic(prealloc);
BUG_ON(!prealloc);
err = insert_state(tree, prealloc, start, end,
- &p, &parent, &bits);
+ &p, &parent, &bits, changeset);
if (err)
extent_io_tree_panic(tree, err);
@@ -899,7 +923,7 @@ hit_next:
goto out;
}
- set_state_bits(tree, state, &bits);
+ set_state_bits(tree, state, &bits, changeset);
cache_state(state, cached_state);
merge_state(tree, state);
if (last_end == (u64)-1)
@@ -945,7 +969,7 @@ hit_next:
if (err)
goto out;
if (state->end <= end) {
- set_state_bits(tree, state, &bits);
+ set_state_bits(tree, state, &bits, changeset);
cache_state(state, cached_state);
merge_state(tree, state);
if (last_end == (u64)-1)
@@ -980,7 +1004,7 @@ hit_next:
* the later extent.
*/
err = insert_state(tree, prealloc, start, this_end,
- NULL, NULL, &bits);
+ NULL, NULL, &bits, changeset);
if (err)
extent_io_tree_panic(tree, err);
@@ -1008,7 +1032,7 @@ hit_next:
if (err)
extent_io_tree_panic(tree, err);
- set_state_bits(tree, prealloc, &bits);
+ set_state_bits(tree, prealloc, &bits, changeset);
cache_state(prealloc, cached_state);
merge_state(tree, prealloc);
prealloc = NULL;
@@ -1028,7 +1052,7 @@ search_again:
if (start > end)
goto out;
spin_unlock(&tree->lock);
- if (mask & __GFP_WAIT)
+ if (gfpflags_allow_blocking(mask))
cond_resched();
goto again;
}
@@ -1038,7 +1062,7 @@ int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
struct extent_state **cached_state, gfp_t mask)
{
return __set_extent_bit(tree, start, end, bits, 0, failed_start,
- cached_state, mask);
+ cached_state, mask, NULL);
}
@@ -1076,7 +1100,7 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
btrfs_debug_check_extent_io_range(tree, start, end);
again:
- if (!prealloc && (mask & __GFP_WAIT)) {
+ if (!prealloc && gfpflags_allow_blocking(mask)) {
/*
* Best effort, don't worry if extent state allocation fails
* here for the first iteration. We might have a cached state
@@ -1111,7 +1135,7 @@ again:
goto out;
}
err = insert_state(tree, prealloc, start, end,
- &p, &parent, &bits);
+ &p, &parent, &bits, NULL);
if (err)
extent_io_tree_panic(tree, err);
cache_state(prealloc, cached_state);
@@ -1130,9 +1154,9 @@ hit_next:
* Just lock what we found and keep going
*/
if (state->start == start && state->end <= end) {
- set_state_bits(tree, state, &bits);
+ set_state_bits(tree, state, &bits, NULL);
cache_state(state, cached_state);
- state = clear_state_bit(tree, state, &clear_bits, 0);
+ state = clear_state_bit(tree, state, &clear_bits, 0, NULL);
if (last_end == (u64)-1)
goto out;
start = last_end + 1;
@@ -1171,9 +1195,10 @@ hit_next:
if (err)
goto out;
if (state->end <= end) {
- set_state_bits(tree, state, &bits);
+ set_state_bits(tree, state, &bits, NULL);
cache_state(state, cached_state);
- state = clear_state_bit(tree, state, &clear_bits, 0);
+ state = clear_state_bit(tree, state, &clear_bits, 0,
+ NULL);
if (last_end == (u64)-1)
goto out;
start = last_end + 1;
@@ -1208,7 +1233,7 @@ hit_next:
* the later extent.
*/
err = insert_state(tree, prealloc, start, this_end,
- NULL, NULL, &bits);
+ NULL, NULL, &bits, NULL);
if (err)
extent_io_tree_panic(tree, err);
cache_state(prealloc, cached_state);
@@ -1233,9 +1258,9 @@ hit_next:
if (err)
extent_io_tree_panic(tree, err);
- set_state_bits(tree, prealloc, &bits);
+ set_state_bits(tree, prealloc, &bits, NULL);
cache_state(prealloc, cached_state);
- clear_state_bit(tree, prealloc, &clear_bits, 0);
+ clear_state_bit(tree, prealloc, &clear_bits, 0, NULL);
prealloc = NULL;
goto out;
}
@@ -1253,7 +1278,7 @@ search_again:
if (start > end)
goto out;
spin_unlock(&tree->lock);
- if (mask & __GFP_WAIT)
+ if (gfpflags_allow_blocking(mask))
cond_resched();
first_iteration = false;
goto again;
@@ -1274,6 +1299,30 @@ int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
NULL, mask);
}
+int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+ unsigned bits, gfp_t mask,
+ struct extent_changeset *changeset)
+{
+ /*
+ * We don't support EXTENT_LOCKED yet, as current changeset will
+ * record any bits changed, so for EXTENT_LOCKED case, it will
+ * either fail with -EEXIST or changeset will record the whole
+ * range.
+ */
+ BUG_ON(bits & EXTENT_LOCKED);
+
+ return __set_extent_bit(tree, start, end, bits, 0, NULL, NULL, mask,
+ changeset);
+}
+
+int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
+ unsigned bits, int wake, int delete,
+ struct extent_state **cached, gfp_t mask)
+{
+ return __clear_extent_bit(tree, start, end, bits, wake, delete,
+ cached, mask, NULL);
+}
+
int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, gfp_t mask)
{
@@ -1285,6 +1334,20 @@ int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
return clear_extent_bit(tree, start, end, bits, wake, 0, NULL, mask);
}
+int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+ unsigned bits, gfp_t mask,
+ struct extent_changeset *changeset)
+{
+ /*
+ * Don't support EXTENT_LOCKED case, same reason as
+ * set_record_extent_bits().
+ */
+ BUG_ON(bits & EXTENT_LOCKED);
+
+ return __clear_extent_bit(tree, start, end, bits, 0, 0, NULL, mask,
+ changeset);
+}
+
int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
struct extent_state **cached_state, gfp_t mask)
{
@@ -1343,7 +1406,7 @@ int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
while (1) {
err = __set_extent_bit(tree, start, end, EXTENT_LOCKED | bits,
EXTENT_LOCKED, &failed_start,
- cached_state, GFP_NOFS);
+ cached_state, GFP_NOFS, NULL);
if (err == -EEXIST) {
wait_extent_bit(tree, failed_start, end, EXTENT_LOCKED);
start = failed_start;
@@ -1365,7 +1428,7 @@ int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
u64 failed_start;
err = __set_extent_bit(tree, start, end, EXTENT_LOCKED, EXTENT_LOCKED,
- &failed_start, NULL, GFP_NOFS);
+ &failed_start, NULL, GFP_NOFS, NULL);
if (err == -EEXIST) {
if (failed_start > start)
clear_extent_bit(tree, start, failed_start - 1,
@@ -2078,8 +2141,8 @@ int repair_io_failure(struct inode *inode, u64 start, u64 length, u64 logical,
return -EIO;
}
- printk_ratelimited_in_rcu(KERN_INFO
- "BTRFS: read error corrected: ino %llu off %llu (dev %s sector %llu)\n",
+ btrfs_info_rl_in_rcu(fs_info,
+ "read error corrected: ino %llu off %llu (dev %s sector %llu)",
btrfs_ino(inode), start,
rcu_str_deref(dev->name), sector);
bio_put(bio);
@@ -3070,8 +3133,12 @@ static int __do_readpage(struct extent_io_tree *tree,
set_extent_uptodate(tree, cur, cur + iosize - 1,
&cached, GFP_NOFS);
- unlock_extent_cached(tree, cur, cur + iosize - 1,
- &cached, GFP_NOFS);
+ if (parent_locked)
+ free_extent_state(cached);
+ else
+ unlock_extent_cached(tree, cur,
+ cur + iosize - 1,
+ &cached, GFP_NOFS);
cur = cur + iosize;
pg_offset += iosize;
continue;
@@ -3132,12 +3199,12 @@ static inline void __do_contiguous_readpages(struct extent_io_tree *tree,
get_extent_t *get_extent,
struct extent_map **em_cached,
struct bio **bio, int mirror_num,
- unsigned long *bio_flags, int rw)
+ unsigned long *bio_flags, int rw,
+ u64 *prev_em_start)
{
struct inode *inode;
struct btrfs_ordered_extent *ordered;
int index;
- u64 prev_em_start = (u64)-1;
inode = pages[0]->mapping->host;
while (1) {
@@ -3153,7 +3220,7 @@ static inline void __do_contiguous_readpages(struct extent_io_tree *tree,
for (index = 0; index < nr_pages; index++) {
__do_readpage(tree, pages[index], get_extent, em_cached, bio,
- mirror_num, bio_flags, rw, &prev_em_start);
+ mirror_num, bio_flags, rw, prev_em_start);
page_cache_release(pages[index]);
}
}
@@ -3163,7 +3230,8 @@ static void __extent_readpages(struct extent_io_tree *tree,
int nr_pages, get_extent_t *get_extent,
struct extent_map **em_cached,
struct bio **bio, int mirror_num,
- unsigned long *bio_flags, int rw)
+ unsigned long *bio_flags, int rw,
+ u64 *prev_em_start)
{
u64 start = 0;
u64 end = 0;
@@ -3184,7 +3252,7 @@ static void __extent_readpages(struct extent_io_tree *tree,
index - first_index, start,
end, get_extent, em_cached,
bio, mirror_num, bio_flags,
- rw);
+ rw, prev_em_start);
start = page_start;
end = start + PAGE_CACHE_SIZE - 1;
first_index = index;
@@ -3195,7 +3263,8 @@ static void __extent_readpages(struct extent_io_tree *tree,
__do_contiguous_readpages(tree, &pages[first_index],
index - first_index, start,
end, get_extent, em_cached, bio,
- mirror_num, bio_flags, rw);
+ mirror_num, bio_flags, rw,
+ prev_em_start);
}
static int __extent_read_full_page(struct extent_io_tree *tree,
@@ -4207,6 +4276,7 @@ int extent_readpages(struct extent_io_tree *tree,
struct page *page;
struct extent_map *em_cached = NULL;
int nr = 0;
+ u64 prev_em_start = (u64)-1;
for (page_idx = 0; page_idx < nr_pages; page_idx++) {
page = list_entry(pages->prev, struct page, lru);
@@ -4223,12 +4293,12 @@ int extent_readpages(struct extent_io_tree *tree,
if (nr < ARRAY_SIZE(pagepool))
continue;
__extent_readpages(tree, pagepool, nr, get_extent, &em_cached,
- &bio, 0, &bio_flags, READ);
+ &bio, 0, &bio_flags, READ, &prev_em_start);
nr = 0;
}
if (nr)
__extent_readpages(tree, pagepool, nr, get_extent, &em_cached,
- &bio, 0, &bio_flags, READ);
+ &bio, 0, &bio_flags, READ, &prev_em_start);
if (em_cached)
free_extent_map(em_cached);
@@ -4316,7 +4386,7 @@ int try_release_extent_mapping(struct extent_map_tree *map,
u64 start = page_offset(page);
u64 end = start + PAGE_CACHE_SIZE - 1;
- if ((mask & __GFP_WAIT) &&
+ if (gfpflags_allow_blocking(mask) &&
page->mapping->host->i_size > 16 * 1024 * 1024) {
u64 len;
while (start <= end) {
@@ -5563,13 +5633,15 @@ void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
unsigned long src_i;
if (src_offset + len > dst->len) {
- printk(KERN_ERR "BTRFS: memmove bogus src_offset %lu move "
- "len %lu dst len %lu\n", src_offset, len, dst->len);
+ btrfs_err(dst->fs_info,
+ "memmove bogus src_offset %lu move "
+ "len %lu dst len %lu", src_offset, len, dst->len);
BUG_ON(1);
}
if (dst_offset + len > dst->len) {
- printk(KERN_ERR "BTRFS: memmove bogus dst_offset %lu move "
- "len %lu dst len %lu\n", dst_offset, len, dst->len);
+ btrfs_err(dst->fs_info,
+ "memmove bogus dst_offset %lu move "
+ "len %lu dst len %lu", dst_offset, len, dst->len);
BUG_ON(1);
}
@@ -5609,13 +5681,13 @@ void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
unsigned long src_i;
if (src_offset + len > dst->len) {
- printk(KERN_ERR "BTRFS: memmove bogus src_offset %lu move "
- "len %lu len %lu\n", src_offset, len, dst->len);
+ btrfs_err(dst->fs_info, "memmove bogus src_offset %lu move "
+ "len %lu len %lu", src_offset, len, dst->len);
BUG_ON(1);
}
if (dst_offset + len > dst->len) {
- printk(KERN_ERR "BTRFS: memmove bogus dst_offset %lu move "
- "len %lu len %lu\n", dst_offset, len, dst->len);
+ btrfs_err(dst->fs_info, "memmove bogus dst_offset %lu move "
+ "len %lu len %lu", dst_offset, len, dst->len);
BUG_ON(1);
}
if (dst_offset < src_offset) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 21:05:24 +0000