From 5f7f7543f52eee03ed35c9d671fbb1cdbd4bc9b5 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Wed, 12 Apr 2017 12:24:40 +0200 Subject: 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 CC: linux-fsdevel@vger.kernel.org Acked-by: Miklos Szeredi Reviewed-by: Christoph Hellwig Signed-off-by: Jan Kara Signed-off-by: Jens Axboe --- fs/fuse/inode.c | 42 +++++++++++++----------------------------- 1 file changed, 13 insertions(+), 29 deletions(-) (limited to 'fs/fuse/inode.c') 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//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); -- cgit v1.2.3-59-g8ed1b