* [PATCH] btrfs: lift errors from add_extent_changeset to the callers
@ 2018-03-27 17:44 David Sterba
2018-03-28 13:57 ` David Sterba
0 siblings, 1 reply; 2+ messages in thread
From: David Sterba @ 2018-03-27 17:44 UTC (permalink / raw)
To: linux-btrfs; +Cc: David Sterba
The missing error handling in add_extent_changeset was hidden, so make
it at least visible in the callers.
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/extent_io.c | 19 +++++++++++--------
1 file changed, 11 insertions(+), 8 deletions(-)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index f27bad003f8e..f141d0fd7a65 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -119,23 +119,22 @@ struct extent_page_data {
unsigned int sync_io:1;
};
-static void add_extent_changeset(struct extent_state *state, unsigned bits,
+static int add_extent_changeset(struct extent_state *state, unsigned bits,
struct extent_changeset *changeset,
int set)
{
int ret;
if (!changeset)
- return;
+ return 0;
if (set && (state->state & bits) == bits)
- return;
+ return 0;
if (!set && (state->state & bits) == 0)
- return;
+ return 0;
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);
+ return ret;
}
static void flush_write_bio(struct extent_page_data *epd);
@@ -527,6 +526,7 @@ static struct extent_state *clear_state_bit(struct extent_io_tree *tree,
{
struct extent_state *next;
unsigned bits_to_clear = *bits & ~EXTENT_CTLBITS;
+ int ret;
if ((bits_to_clear & EXTENT_DIRTY) && (state->state & EXTENT_DIRTY)) {
u64 range = state->end - state->start + 1;
@@ -534,7 +534,8 @@ 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);
+ ret = add_extent_changeset(state, bits_to_clear, changeset, 0);
+ BUG_ON(ret);
state->state &= ~bits_to_clear;
if (wake)
wake_up(&state->wq);
@@ -805,13 +806,15 @@ static void set_state_bits(struct extent_io_tree *tree,
unsigned *bits, struct extent_changeset *changeset)
{
unsigned bits_to_set = *bits & ~EXTENT_CTLBITS;
+ int ret;
set_state_cb(tree, state, bits);
if ((bits_to_set & EXTENT_DIRTY) && !(state->state & EXTENT_DIRTY)) {
u64 range = state->end - state->start + 1;
tree->dirty_bytes += range;
}
- add_extent_changeset(state, bits_to_set, changeset, 1);
+ ret = add_extent_changeset(state, bits_to_set, changeset, 1);
+ BUG_ON(ret);
state->state |= bits_to_set;
}
--
2.16.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] btrfs: lift errors from add_extent_changeset to the callers
2018-03-27 17:44 [PATCH] btrfs: lift errors from add_extent_changeset to the callers David Sterba
@ 2018-03-28 13:57 ` David Sterba
0 siblings, 0 replies; 2+ messages in thread
From: David Sterba @ 2018-03-28 13:57 UTC (permalink / raw)
To: David Sterba; +Cc: linux-btrfs
On Tue, Mar 27, 2018 at 07:44:03PM +0200, David Sterba wrote:
> The missing error handling in add_extent_changeset was hidden, so make
> it at least visible in the callers.
>
> Signed-off-by: David Sterba <dsterba@suse.com>
> ---
> fs/btrfs/extent_io.c | 19 +++++++++++--------
> 1 file changed, 11 insertions(+), 8 deletions(-)
>
> diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
> index f27bad003f8e..f141d0fd7a65 100644
> --- a/fs/btrfs/extent_io.c
> +++ b/fs/btrfs/extent_io.c
> @@ -119,23 +119,22 @@ struct extent_page_data {
> unsigned int sync_io:1;
> };
>
> -static void add_extent_changeset(struct extent_state *state, unsigned bits,
> +static int add_extent_changeset(struct extent_state *state, unsigned bits,
> struct extent_changeset *changeset,
> int set)
> {
> int ret;
>
> if (!changeset)
> - return;
> + return 0;
> if (set && (state->state & bits) == bits)
> - return;
> + return 0;
> if (!set && (state->state & bits) == 0)
> - return;
> + return 0;
> 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);
> + return ret;
> }
>
> static void flush_write_bio(struct extent_page_data *epd);
> @@ -527,6 +526,7 @@ static struct extent_state *clear_state_bit(struct extent_io_tree *tree,
> {
> struct extent_state *next;
> unsigned bits_to_clear = *bits & ~EXTENT_CTLBITS;
> + int ret;
>
> if ((bits_to_clear & EXTENT_DIRTY) && (state->state & EXTENT_DIRTY)) {
> u64 range = state->end - state->start + 1;
> @@ -534,7 +534,8 @@ 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);
> + ret = add_extent_changeset(state, bits_to_clear, changeset, 0);
> + BUG_ON(ret);
This must be BUG_ON(ret < 0) of course.
> state->state &= ~bits_to_clear;
> if (wake)
> wake_up(&state->wq);
> @@ -805,13 +806,15 @@ static void set_state_bits(struct extent_io_tree *tree,
> unsigned *bits, struct extent_changeset *changeset)
> {
> unsigned bits_to_set = *bits & ~EXTENT_CTLBITS;
> + int ret;
>
> set_state_cb(tree, state, bits);
> if ((bits_to_set & EXTENT_DIRTY) && !(state->state & EXTENT_DIRTY)) {
> u64 range = state->end - state->start + 1;
> tree->dirty_bytes += range;
> }
> - add_extent_changeset(state, bits_to_set, changeset, 1);
> + ret = add_extent_changeset(state, bits_to_set, changeset, 1);
> + BUG_ON(ret);
Same.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2018-03-27 17:44 [PATCH] btrfs: lift errors from add_extent_changeset to the callers David Sterba
2018-03-28 13:57 ` David Sterba
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