fuse: Convert to separately allocated bdi
Allocate struct backing_dev_info separately instead of embedding it
inside the superblock. This unifies handling of bdi among users.
CC: Miklos Szeredi <miklos@szeredi.hu>
CC: linux-fsdevel@vger.kernel.org
Acked-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 6fe6a88..90bacbc 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -386,12 +386,6 @@
}
}
-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 @@
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 @@
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 @@
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 |
@@ -976,28 +970,21 @@
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;
+ 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;
+
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);
- }
-
- if (err)
- return err;
-
/*
* For a single fuse filesystem use max 1% of dirty +
* writeback threshold.
@@ -1010,7 +997,7 @@
*
* /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 @@
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 @@
err_dev_free:
fuse_dev_free(fud);
err_put_conn:
- fuse_bdi_destroy(fc);
fuse_conn_put(fc);
err_fput:
fput(file);