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authorJohannes Thumshirn <jthumshirn@suse.de>2018-08-24 10:39:48 +0200
committerJohannes Thumshirn <jthumshirn@suse.de>2018-08-24 10:39:48 +0200
commit302a4390aa1ecb4021567ecfb7f77ab5c17a26c0 (patch)
tree515649f50c8d51aefc1f522a07c28754c9a27fca
parent07d9f7c37bd3d0d3a86ec6e72cf2191e5b0a4e1f (diff)
parentdf530be9fd39a21f97a541d0ab921241f6a815fe (diff)
Merge remote-tracking branch 'origin/users/rgoldwyn/SLE12-SP4/for-next' into SLE12-SP4
Pull fuse fixes from Goldwyn Rodrigues suse-commit: 651ab129cfd5b29c19e0bf07f8d852f0c00da03f
-rw-r--r--fs/fuse/dev.c22
-rw-r--r--fs/fuse/file.c1
-rw-r--r--fs/fuse/fuse_i.h1
-rw-r--r--fs/fuse/inode.c23
4 files changed, 32 insertions, 15 deletions
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index e2d9ed65db65..0a1b036ba2a1 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -131,6 +131,16 @@ static bool fuse_block_alloc(struct fuse_conn *fc, bool for_background)
return !fc->initialized || (for_background && fc->blocked);
}
+static void fuse_drop_waiting(struct fuse_conn *fc)
+{
+ if (fc->connected) {
+ atomic_dec(&fc->num_waiting);
+ } else if (atomic_dec_and_test(&fc->num_waiting)) {
+ /* wake up aborters */
+ wake_up_all(&fc->blocked_waitq);
+ }
+}
+
static struct fuse_req *__fuse_get_req(struct fuse_conn *fc, unsigned npages,
bool for_background)
{
@@ -171,7 +181,7 @@ static struct fuse_req *__fuse_get_req(struct fuse_conn *fc, unsigned npages,
return req;
out:
- atomic_dec(&fc->num_waiting);
+ fuse_drop_waiting(fc);
return ERR_PTR(err);
}
@@ -278,7 +288,7 @@ void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req)
if (test_bit(FR_WAITING, &req->flags)) {
__clear_bit(FR_WAITING, &req->flags);
- atomic_dec(&fc->num_waiting);
+ fuse_drop_waiting(fc);
}
if (req->stolen_file)
@@ -364,7 +374,7 @@ static void request_end(struct fuse_conn *fc, struct fuse_req *req)
struct fuse_iqueue *fiq = &fc->iq;
if (test_and_set_bit(FR_FINISHED, &req->flags))
- return;
+ goto put_request;
spin_lock(&fiq->waitq.lock);
list_del_init(&req->intr_entry);
@@ -393,6 +403,7 @@ static void request_end(struct fuse_conn *fc, struct fuse_req *req)
wake_up(&req->waitq);
if (req->end)
req->end(fc, req);
+put_request:
fuse_put_request(fc, req);
}
@@ -2131,6 +2142,11 @@ void fuse_abort_conn(struct fuse_conn *fc)
}
EXPORT_SYMBOL_GPL(fuse_abort_conn);
+void fuse_wait_aborted(struct fuse_conn *fc)
+{
+ wait_event(fc->blocked_waitq, atomic_read(&fc->num_waiting) == 0);
+}
+
int fuse_dev_release(struct inode *inode, struct file *file)
{
struct fuse_dev *fud = fuse_get_dev(file);
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index e6d40e4f5e83..b4bccc0cdb65 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -863,6 +863,7 @@ static int fuse_readpages_fill(void *_data, struct page *page)
}
if (WARN_ON(req->num_pages >= req->max_pages)) {
+ unlock_page(page);
fuse_put_request(fc, req);
return -EIO;
}
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 1bd7ffdad593..beed8efeb3db 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -852,6 +852,7 @@ void fuse_request_send_background_locked(struct fuse_conn *fc,
/* Abort all requests */
void fuse_abort_conn(struct fuse_conn *fc);
+void fuse_wait_aborted(struct fuse_conn *fc);
/**
* Invalidate inode attributes
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 26ff5c44f540..3a2dd580ea95 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -391,9 +391,6 @@ static void fuse_put_super(struct super_block *sb)
{
struct fuse_conn *fc = get_fuse_conn_super(sb);
- fuse_send_destroy(fc);
-
- fuse_abort_conn(fc);
mutex_lock(&fuse_mutex);
list_del(&fc->entry);
fuse_ctl_remove_conn(fc);
@@ -1190,16 +1187,25 @@ static struct dentry *fuse_mount(struct file_system_type *fs_type,
return mount_nodev(fs_type, flags, raw_data, fuse_fill_super);
}
-static void fuse_kill_sb_anon(struct super_block *sb)
+static void fuse_sb_destroy(struct super_block *sb)
{
struct fuse_conn *fc = get_fuse_conn_super(sb);
if (fc) {
+ fuse_send_destroy(fc);
+
+ fuse_abort_conn(fc);
+ fuse_wait_aborted(fc);
+
down_write(&fc->killsb);
fc->sb = NULL;
up_write(&fc->killsb);
}
+}
+static void fuse_kill_sb_anon(struct super_block *sb)
+{
+ fuse_sb_destroy(sb);
kill_anon_super(sb);
}
@@ -1222,14 +1228,7 @@ static struct dentry *fuse_mount_blk(struct file_system_type *fs_type,
static void fuse_kill_sb_blk(struct super_block *sb)
{
- struct fuse_conn *fc = get_fuse_conn_super(sb);
-
- if (fc) {
- down_write(&fc->killsb);
- fc->sb = NULL;
- up_write(&fc->killsb);
- }
-
+ fuse_sb_destroy(sb);
kill_block_super(sb);
}