Allocate struct backing_dev_info separately instead of embedding it
inside the superblock. This unifies handling of bdi among users.
CC: Miklos Szeredi <miklos@xxxxxxxxxx>
CC: linux-fsdevel@xxxxxxxxxxxxxxx
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
fs/fuse/dev.c | 8 ++++----
fs/fuse/fuse_i.h | 3 ---
fs/fuse/inode.c | 42 +++++++++++++-----------------------------
3 files changed, 17 insertions(+), 36 deletions(-)
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 70ea57c7b6bb..1912164d57e9 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -382,8 +382,8 @@ static void request_end(struct fuse_conn *fc, struct fuse_req *req)
if (fc->num_background == fc->congestion_threshold &&
fc->connected && fc->bdi_initialized) {
- clear_bdi_congested(&fc->bdi, BLK_RW_SYNC);
- clear_bdi_congested(&fc->bdi, BLK_RW_ASYNC);
+ clear_bdi_congested(fc->sb->s_bdi, BLK_RW_SYNC);
+ clear_bdi_congested(fc->sb->s_bdi, BLK_RW_ASYNC);
}
fc->num_background--;
fc->active_background--;
@@ -570,8 +570,8 @@ void fuse_request_send_background_locked(struct fuse_conn *fc,
fc->blocked = 1;
if (fc->num_background == fc->congestion_threshold &&
fc->bdi_initialized) {
- set_bdi_congested(&fc->bdi, BLK_RW_SYNC);
- set_bdi_congested(&fc->bdi, BLK_RW_ASYNC);
+ set_bdi_congested(fc->sb->s_bdi, BLK_RW_SYNC);
+ set_bdi_congested(fc->sb->s_bdi, BLK_RW_ASYNC);
}
list_add_tail(&req->list, &fc->bg_queue);
flush_bg_queue(fc);
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 91307940c8ac..effab9e9607f 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -631,9 +631,6 @@ struct fuse_conn {
/** Negotiated minor version */
unsigned minor;
- /** Backing dev info */
- struct backing_dev_info bdi;
-
/** Entry on the fuse_conn_list */
struct list_head entry;
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 6fe6a88ecb4a..90bacbc87fb3 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -386,12 +386,6 @@ static void fuse_send_destroy(struct fuse_conn *fc)
}
}
-static void fuse_bdi_destroy(struct fuse_conn *fc)
-{
- if (fc->bdi_initialized)
- bdi_destroy(&fc->bdi);
-}
-
static void fuse_put_super(struct super_block *sb)
{
struct fuse_conn *fc = get_fuse_conn_super(sb);
@@ -403,7 +397,6 @@ static void fuse_put_super(struct super_block *sb)
list_del(&fc->entry);
fuse_ctl_remove_conn(fc);
mutex_unlock(&fuse_mutex);
- fuse_bdi_destroy(fc);
fuse_conn_put(fc);
}
@@ -928,7 +921,8 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
fc->no_flock = 1;
}
- fc->bdi.ra_pages = min(fc->bdi.ra_pages, ra_pages);
+ fc->sb->s_bdi->ra_pages =
+ min(fc->sb->s_bdi->ra_pages, ra_pages);
fc->minor = arg->minor;
fc->max_write = arg->minor < 5 ? 4096 : arg->max_write;
fc->max_write = max_t(unsigned, 4096, fc->max_write);
@@ -944,7 +938,7 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req)
arg->major = FUSE_KERNEL_VERSION;
arg->minor = FUSE_KERNEL_MINOR_VERSION;
- arg->max_readahead = fc->bdi.ra_pages * PAGE_SIZE;
+ arg->max_readahead = fc->sb->s_bdi->ra_pages * PAGE_SIZE;
arg->flags |= FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC |
FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK |
FUSE_SPLICE_WRITE | FUSE_SPLICE_MOVE | FUSE_SPLICE_READ |
@@ -976,27 +970,20 @@ static void fuse_free_conn(struct fuse_conn *fc)
static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb)
{
int err;
+ char *suffix = "";
- fc->bdi.name = "fuse";
- fc->bdi.ra_pages = (VM_MAX_READAHEAD * 1024) / PAGE_SIZE;
- /* fuse does it's own writeback accounting */
- fc->bdi.capabilities = BDI_CAP_NO_ACCT_WB | BDI_CAP_STRICTLIMIT;
-
- err = bdi_init(&fc->bdi);
+ if (sb->s_bdev)
+ suffix = "-fuseblk";
+ err = super_setup_bdi_name(sb, "%u:%u%s", MAJOR(fc->dev),
+ MINOR(fc->dev), suffix);
if (err)
return err;
- fc->bdi_initialized = 1;
-
- if (sb->s_bdev) {
- err = bdi_register(&fc->bdi, NULL, "%u:%u-fuseblk",
- MAJOR(fc->dev), MINOR(fc->dev));
- } else {
- err = bdi_register_dev(&fc->bdi, fc->dev);
- }
+ sb->s_bdi->ra_pages = (VM_MAX_READAHEAD * 1024) / PAGE_SIZE;
+ /* fuse does it's own writeback accounting */
+ sb->s_bdi->capabilities = BDI_CAP_NO_ACCT_WB | BDI_CAP_STRICTLIMIT;
- if (err)
- return err;
+ fc->bdi_initialized = 1;
/*
* For a single fuse filesystem use max 1% of dirty +
@@ -1010,7 +997,7 @@ static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb)
*
* /sys/class/bdi/<bdi>/max_ratio
*/
- bdi_set_max_ratio(&fc->bdi, 1);
+ bdi_set_max_ratio(sb->s_bdi, 1);
return 0;
}
@@ -1113,8 +1100,6 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
if (err)
goto err_dev_free;
- sb->s_bdi = &fc->bdi;
-
/* Handle umasking inside the fuse code */
if (sb->s_flags & MS_POSIXACL)
fc->dont_mask = 1;
@@ -1182,7 +1167,6 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
err_dev_free:
fuse_dev_free(fud);
err_put_conn:
- fuse_bdi_destroy(fc);
fuse_conn_put(fc);
err_fput:
fput(file);
--
2.10.2
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