* [PATCH] btrfs: Use wrapper macro for rcu string to remove duplicate code
[not found] <cover.1533189995.git.misono.tomohiro@jp.fujitsu.com>
@ 2018-08-02 7:19 ` Misono Tomohiro
2018-08-02 8:52 ` Qu Wenruo
2018-08-02 14:43 ` David Sterba
0 siblings, 2 replies; 3+ messages in thread
From: Misono Tomohiro @ 2018-08-02 7:19 UTC (permalink / raw)
To: linux-btrfs
Cleanup patch and no functional changes.
Signed-off-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
---
fs/btrfs/ioctl.c | 6 ++----
fs/btrfs/scrub.c | 8 ++------
fs/btrfs/super.c | 9 +++------
fs/btrfs/volumes.c | 21 ++++++---------------
4 files changed, 13 insertions(+), 31 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index b077544b5232..2becabe2aaf4 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3165,10 +3165,8 @@ static long btrfs_ioctl_dev_info(struct btrfs_fs_info *fs_info,
di_args->total_bytes = btrfs_device_get_total_bytes(dev);
memcpy(di_args->uuid, dev->uuid, sizeof(di_args->uuid));
if (dev->name) {
- struct rcu_string *name;
-
- name = rcu_dereference(dev->name);
- strncpy(di_args->path, name->str, sizeof(di_args->path) - 1);
+ strncpy(di_args->path, rcu_str_deref(dev->name),
+ sizeof(di_args->path) - 1);
di_args->path[sizeof(di_args->path) - 1] = 0;
} else {
di_args->path[0] = '\0';
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 6702896cdb8f..5a282268deee 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -4113,7 +4113,6 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
struct scrub_ctx *sctx;
int ret;
struct btrfs_device *dev;
- struct rcu_string *name;
if (btrfs_fs_closing(fs_info))
return -EINVAL;
@@ -4167,11 +4166,8 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
if (!is_dev_replace && !readonly &&
!test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) {
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
- rcu_read_lock();
- name = rcu_dereference(dev->name);
- btrfs_err(fs_info, "scrub: device %s is not writable",
- name->str);
- rcu_read_unlock();
+ btrfs_err_in_rcu(fs_info, "scrub: device %s is not writable",
+ rcu_str_deref(dev->name));
return -EROFS;
}
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 81107ad49f3a..d9f00704f4aa 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -2290,7 +2290,6 @@ static int btrfs_show_devname(struct seq_file *m, struct dentry *root)
struct btrfs_fs_devices *cur_devices;
struct btrfs_device *dev, *first_dev = NULL;
struct list_head *head;
- struct rcu_string *name;
/*
* Lightweight locking of the devices. We should not need
@@ -2314,12 +2313,10 @@ static int btrfs_show_devname(struct seq_file *m, struct dentry *root)
cur_devices = cur_devices->seed;
}
- if (first_dev) {
- name = rcu_dereference(first_dev->name);
- seq_escape(m, name->str, " \t\n\\");
- } else {
+ if (first_dev)
+ seq_escape(m, rcu_str_deref(first_dev->name), " \t\n\\");
+ else
WARN_ON(1);
- }
rcu_read_unlock();
return 0;
}
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 1da162928d1a..d30bbc3cf921 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -6187,21 +6187,12 @@ static void submit_stripe_bio(struct btrfs_bio *bbio, struct bio *bio,
btrfs_io_bio(bio)->stripe_index = dev_nr;
bio->bi_end_io = btrfs_end_bio;
bio->bi_iter.bi_sector = physical >> 9;
-#ifdef DEBUG
- {
- struct rcu_string *name;
-
- rcu_read_lock();
- name = rcu_dereference(dev->name);
- btrfs_debug(fs_info,
- "btrfs_map_bio: rw %d 0x%x, sector=%llu, dev=%lu (%s id %llu), size=%u",
- bio_op(bio), bio->bi_opf,
- (u64)bio->bi_iter.bi_sector,
- (u_long)dev->bdev->bd_dev, name->str, dev->devid,
- bio->bi_iter.bi_size);
- rcu_read_unlock();
- }
-#endif
+ btrfs_debug_in_rcu(fs_info,
+ "btrfs_map_bio: rw %d 0x%x, sector=%llu, dev=%lu (%s id %llu), size=%u",
+ bio_op(bio), bio->bi_opf,
+ (u64)bio->bi_iter.bi_sector,
+ (u_long)dev->bdev->bd_dev, rcu_str_deref(dev->name), dev->devid,
+ bio->bi_iter.bi_size);
bio_set_dev(bio, dev->bdev);
btrfs_bio_counter_inc_noblocked(fs_info);
--
2.14.4
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] btrfs: Use wrapper macro for rcu string to remove duplicate code
2018-08-02 7:19 ` [PATCH] btrfs: Use wrapper macro for rcu string to remove duplicate code Misono Tomohiro
@ 2018-08-02 8:52 ` Qu Wenruo
2018-08-02 14:43 ` David Sterba
1 sibling, 0 replies; 3+ messages in thread
From: Qu Wenruo @ 2018-08-02 8:52 UTC (permalink / raw)
To: Misono Tomohiro, linux-btrfs
[-- Attachment #1.1: Type: text/plain, Size: 4273 bytes --]
On 2018年08月02日 15:19, Misono Tomohiro wrote:
> Cleanup patch and no functional changes.
>
> Signed-off-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
Looks good to me.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Thanks,
Qu
> ---
> fs/btrfs/ioctl.c | 6 ++----
> fs/btrfs/scrub.c | 8 ++------
> fs/btrfs/super.c | 9 +++------
> fs/btrfs/volumes.c | 21 ++++++---------------
> 4 files changed, 13 insertions(+), 31 deletions(-)
>
> diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
> index b077544b5232..2becabe2aaf4 100644
> --- a/fs/btrfs/ioctl.c
> +++ b/fs/btrfs/ioctl.c
> @@ -3165,10 +3165,8 @@ static long btrfs_ioctl_dev_info(struct btrfs_fs_info *fs_info,
> di_args->total_bytes = btrfs_device_get_total_bytes(dev);
> memcpy(di_args->uuid, dev->uuid, sizeof(di_args->uuid));
> if (dev->name) {
> - struct rcu_string *name;
> -
> - name = rcu_dereference(dev->name);
> - strncpy(di_args->path, name->str, sizeof(di_args->path) - 1);
> + strncpy(di_args->path, rcu_str_deref(dev->name),
> + sizeof(di_args->path) - 1);
> di_args->path[sizeof(di_args->path) - 1] = 0;
> } else {
> di_args->path[0] = '\0';
> diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
> index 6702896cdb8f..5a282268deee 100644
> --- a/fs/btrfs/scrub.c
> +++ b/fs/btrfs/scrub.c
> @@ -4113,7 +4113,6 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
> struct scrub_ctx *sctx;
> int ret;
> struct btrfs_device *dev;
> - struct rcu_string *name;
>
> if (btrfs_fs_closing(fs_info))
> return -EINVAL;
> @@ -4167,11 +4166,8 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
> if (!is_dev_replace && !readonly &&
> !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) {
> mutex_unlock(&fs_info->fs_devices->device_list_mutex);
> - rcu_read_lock();
> - name = rcu_dereference(dev->name);
> - btrfs_err(fs_info, "scrub: device %s is not writable",
> - name->str);
> - rcu_read_unlock();
> + btrfs_err_in_rcu(fs_info, "scrub: device %s is not writable",
> + rcu_str_deref(dev->name));
> return -EROFS;
> }
>
> diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
> index 81107ad49f3a..d9f00704f4aa 100644
> --- a/fs/btrfs/super.c
> +++ b/fs/btrfs/super.c
> @@ -2290,7 +2290,6 @@ static int btrfs_show_devname(struct seq_file *m, struct dentry *root)
> struct btrfs_fs_devices *cur_devices;
> struct btrfs_device *dev, *first_dev = NULL;
> struct list_head *head;
> - struct rcu_string *name;
>
> /*
> * Lightweight locking of the devices. We should not need
> @@ -2314,12 +2313,10 @@ static int btrfs_show_devname(struct seq_file *m, struct dentry *root)
> cur_devices = cur_devices->seed;
> }
>
> - if (first_dev) {
> - name = rcu_dereference(first_dev->name);
> - seq_escape(m, name->str, " \t\n\\");
> - } else {
> + if (first_dev)
> + seq_escape(m, rcu_str_deref(first_dev->name), " \t\n\\");
> + else
> WARN_ON(1);
> - }
> rcu_read_unlock();
> return 0;
> }
> diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
> index 1da162928d1a..d30bbc3cf921 100644
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -6187,21 +6187,12 @@ static void submit_stripe_bio(struct btrfs_bio *bbio, struct bio *bio,
> btrfs_io_bio(bio)->stripe_index = dev_nr;
> bio->bi_end_io = btrfs_end_bio;
> bio->bi_iter.bi_sector = physical >> 9;
> -#ifdef DEBUG
> - {
> - struct rcu_string *name;
> -
> - rcu_read_lock();
> - name = rcu_dereference(dev->name);
> - btrfs_debug(fs_info,
> - "btrfs_map_bio: rw %d 0x%x, sector=%llu, dev=%lu (%s id %llu), size=%u",
> - bio_op(bio), bio->bi_opf,
> - (u64)bio->bi_iter.bi_sector,
> - (u_long)dev->bdev->bd_dev, name->str, dev->devid,
> - bio->bi_iter.bi_size);
> - rcu_read_unlock();
> - }
> -#endif
> + btrfs_debug_in_rcu(fs_info,
> + "btrfs_map_bio: rw %d 0x%x, sector=%llu, dev=%lu (%s id %llu), size=%u",
> + bio_op(bio), bio->bi_opf,
> + (u64)bio->bi_iter.bi_sector,
> + (u_long)dev->bdev->bd_dev, rcu_str_deref(dev->name), dev->devid,
> + bio->bi_iter.bi_size);
> bio_set_dev(bio, dev->bdev);
>
> btrfs_bio_counter_inc_noblocked(fs_info);
>
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] btrfs: Use wrapper macro for rcu string to remove duplicate code
2018-08-02 7:19 ` [PATCH] btrfs: Use wrapper macro for rcu string to remove duplicate code Misono Tomohiro
2018-08-02 8:52 ` Qu Wenruo
@ 2018-08-02 14:43 ` David Sterba
1 sibling, 0 replies; 3+ messages in thread
From: David Sterba @ 2018-08-02 14:43 UTC (permalink / raw)
To: Misono Tomohiro; +Cc: linux-btrfs
On Thu, Aug 02, 2018 at 04:19:07PM +0900, Misono Tomohiro wrote:
> Cleanup patch and no functional changes.
>
> Signed-off-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
Nice. Added to misc-next, thanks.
^ permalink raw reply [flat|nested] 3+ messages in thread
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[not found] <cover.1533189995.git.misono.tomohiro@jp.fujitsu.com>
2018-08-02 7:19 ` [PATCH] btrfs: Use wrapper macro for rcu string to remove duplicate code Misono Tomohiro
2018-08-02 8:52 ` Qu Wenruo
2018-08-02 14:43 ` David Sterba
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