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From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
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Date: Mon, 27 Jan 2020 19:01:53 +0000
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Subject: [PATCH] virtiofsd: Clean up inodes on destroy
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Clear out our inodes and fd's on a 'destroy' - so we get rid
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of them if we reboot the guest.
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Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
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Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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(cherry picked from commit 771b01eb76ff480fee984bd1d21727147cc3e702)
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---
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tools/virtiofsd/passthrough_ll.c | 26 ++++++++++++++++++++++++++
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1 file changed, 26 insertions(+)
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diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
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index b176a314d6..9ed77a17fd 100644
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--- a/tools/virtiofsd/passthrough_ll.c
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+++ b/tools/virtiofsd/passthrough_ll.c
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@@ -1169,6 +1169,25 @@ static void unref_inode_lolocked(struct lo_data *lo, struct lo_inode *inode,
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}
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}
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+static int unref_all_inodes_cb(gpointer key, gpointer value, gpointer user_data)
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+{
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+ struct lo_inode *inode = value;
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+ struct lo_data *lo = user_data;
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+
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+ inode->refcount = 0;
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+ lo_map_remove(&lo->ino_map, inode->fuse_ino);
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+ close(inode->fd);
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+
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+ return TRUE;
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+}
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+
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+static void unref_all_inodes(struct lo_data *lo)
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+{
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+ pthread_mutex_lock(&lo->mutex);
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+ g_hash_table_foreach_remove(lo->inodes, unref_all_inodes_cb, lo);
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+ pthread_mutex_unlock(&lo->mutex);
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+}
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+
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static void lo_forget_one(fuse_req_t req, fuse_ino_t ino, uint64_t nlookup)
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{
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struct lo_data *lo = lo_data(req);
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@@ -2035,6 +2054,12 @@ static void lo_lseek(fuse_req_t req, fuse_ino_t ino, off_t off, int whence,
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}
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}
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+static void lo_destroy(void *userdata)
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+{
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+ struct lo_data *lo = (struct lo_data *)userdata;
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+ unref_all_inodes(lo);
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+}
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+
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static struct fuse_lowlevel_ops lo_oper = {
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.init = lo_init,
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.lookup = lo_lookup,
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@@ -2073,6 +2098,7 @@ static struct fuse_lowlevel_ops lo_oper = {
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.copy_file_range = lo_copy_file_range,
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#endif
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.lseek = lo_lseek,
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+ .destroy = lo_destroy,
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};
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/* Print vhost-user.json backend program capabilities */
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