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authorMiklos Szeredi <mszeredi@redhat.com>2016-06-30 13:10:49 +0200
committerMiklos Szeredi <mszeredi@redhat.com>2016-06-30 13:10:49 +0200
commit5c672ab3f0ee0f78f7acad183f34db0f8781a200 (patch)
tree8504dad9b399cbef1a3e252c7253325d51740eae /fs/fuse/dir.c
parent4c2e07c6a29e0129e975727b9f57eede813eea85 (diff)
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fuse: serialize dirops by default
Negotiate with userspace filesystems whether they support parallel readdir and lookup. Disable parallelism by default for fear of breaking fuse filesystems. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Fixes: 9902af79c01a ("parallel lookups: actual switch to rwsem") Fixes: d9b3dbdcfd62 ("fuse: switch to ->iterate_shared()")
Diffstat (limited to 'fs/fuse/dir.c')
-rw-r--r--fs/fuse/dir.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index ccd4971cc6c1..264f07c7754e 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -341,8 +341,10 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
struct dentry *newent;
bool outarg_valid = true;
+ fuse_lock_inode(dir);
err = fuse_lookup_name(dir->i_sb, get_node_id(dir), &entry->d_name,
&outarg, &inode);
+ fuse_unlock_inode(dir);
if (err == -ENOENT) {
outarg_valid = false;
err = 0;
@@ -1341,7 +1343,9 @@ static int fuse_readdir(struct file *file, struct dir_context *ctx)
fuse_read_fill(req, file, ctx->pos, PAGE_SIZE,
FUSE_READDIR);
}
+ fuse_lock_inode(inode);
fuse_request_send(fc, req);
+ fuse_unlock_inode(inode);
nbytes = req->out.args[0].size;
err = req->out.h.error;
fuse_put_request(fc, req);