125 lines
4.4 KiB
Diff
125 lines
4.4 KiB
Diff
From f2c0b07088966c396ddcee54f4bed97cdb01192f Mon Sep 17 00:00:00 2001
|
|
From: Jon Maloy <jmaloy@redhat.com>
|
|
Date: Tue, 9 Feb 2021 23:14:55 -0500
|
|
Subject: [PATCH 2/3] virtiofsd: optionally return inode pointer from
|
|
lo_do_lookup()
|
|
|
|
RH-Author: Jon Maloy <jmaloy@redhat.com>
|
|
Message-id: <20210209231456.1555472-3-jmaloy@redhat.com>
|
|
Patchwork-id: 101022
|
|
O-Subject: [RHEL-8.4.0 qemu-kvm PATCH 2/3] virtiofsd: optionally return inode pointer from lo_do_lookup()
|
|
Bugzilla: 1919111
|
|
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
RH-Acked-by: Greg Kurz <gkurz@redhat.com>
|
|
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
|
|
|
|
From: Stefan Hajnoczi <stefanha@redhat.com>
|
|
|
|
lo_do_lookup() finds an existing inode or allocates a new one. It
|
|
increments nlookup so that the inode stays alive until the client
|
|
releases it.
|
|
|
|
Existing callers don't need the struct lo_inode so the function doesn't
|
|
return it. Extend the function to optionally return the inode. The next
|
|
commit will need it.
|
|
|
|
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
Reviewed-by: Greg Kurz <groug@kaod.org>
|
|
Message-Id: <20210204150208.367837-3-stefanha@redhat.com>
|
|
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
|
|
|
|
(cherry-picked from commit 22d2ece71e533310da31f2857ebc4a00d91968b3)
|
|
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
|
|
Signed-off-by: Jon Maloy <jmaloy.redhat.com>
|
|
---
|
|
tools/virtiofsd/passthrough_ll.c | 29 +++++++++++++++++++++--------
|
|
1 file changed, 21 insertions(+), 8 deletions(-)
|
|
|
|
diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
|
|
index 518ba11c47..e5bd3d73e4 100644
|
|
--- a/tools/virtiofsd/passthrough_ll.c
|
|
+++ b/tools/virtiofsd/passthrough_ll.c
|
|
@@ -878,11 +878,13 @@ static void posix_locks_value_destroy(gpointer data)
|
|
}
|
|
|
|
/*
|
|
- * Increments nlookup and caller must release refcount using
|
|
- * lo_inode_put(&parent).
|
|
+ * Increments nlookup on the inode on success. unref_inode_lolocked() must be
|
|
+ * called eventually to decrement nlookup again. If inodep is non-NULL, the
|
|
+ * inode pointer is stored and the caller must call lo_inode_put().
|
|
*/
|
|
static int lo_do_lookup(fuse_req_t req, fuse_ino_t parent, const char *name,
|
|
- struct fuse_entry_param *e)
|
|
+ struct fuse_entry_param *e,
|
|
+ struct lo_inode **inodep)
|
|
{
|
|
int newfd;
|
|
int res;
|
|
@@ -891,6 +893,10 @@ static int lo_do_lookup(fuse_req_t req, fuse_ino_t parent, const char *name,
|
|
struct lo_inode *inode = NULL;
|
|
struct lo_inode *dir = lo_inode(req, parent);
|
|
|
|
+ if (inodep) {
|
|
+ *inodep = NULL;
|
|
+ }
|
|
+
|
|
/*
|
|
* name_to_handle_at() and open_by_handle_at() can reach here with fuse
|
|
* mount point in guest, but we don't have its inode info in the
|
|
@@ -953,7 +959,14 @@ static int lo_do_lookup(fuse_req_t req, fuse_ino_t parent, const char *name,
|
|
pthread_mutex_unlock(&lo->mutex);
|
|
}
|
|
e->ino = inode->fuse_ino;
|
|
- lo_inode_put(lo, &inode);
|
|
+
|
|
+ /* Transfer ownership of inode pointer to caller or drop it */
|
|
+ if (inodep) {
|
|
+ *inodep = inode;
|
|
+ } else {
|
|
+ lo_inode_put(lo, &inode);
|
|
+ }
|
|
+
|
|
lo_inode_put(lo, &dir);
|
|
|
|
fuse_log(FUSE_LOG_DEBUG, " %lli/%s -> %lli\n", (unsigned long long)parent,
|
|
@@ -988,7 +1001,7 @@ static void lo_lookup(fuse_req_t req, fuse_ino_t parent, const char *name)
|
|
return;
|
|
}
|
|
|
|
- err = lo_do_lookup(req, parent, name, &e);
|
|
+ err = lo_do_lookup(req, parent, name, &e, NULL);
|
|
if (err) {
|
|
fuse_reply_err(req, err);
|
|
} else {
|
|
@@ -1098,7 +1111,7 @@ static void lo_mknod_symlink(fuse_req_t req, fuse_ino_t parent,
|
|
goto out;
|
|
}
|
|
|
|
- saverr = lo_do_lookup(req, parent, name, &e);
|
|
+ saverr = lo_do_lookup(req, parent, name, &e, NULL);
|
|
if (saverr) {
|
|
goto out;
|
|
}
|
|
@@ -1599,7 +1612,7 @@ static void lo_do_readdir(fuse_req_t req, fuse_ino_t ino, size_t size,
|
|
|
|
if (plus) {
|
|
if (!is_dot_or_dotdot(name)) {
|
|
- err = lo_do_lookup(req, ino, name, &e);
|
|
+ err = lo_do_lookup(req, ino, name, &e, NULL);
|
|
if (err) {
|
|
goto error;
|
|
}
|
|
@@ -1793,7 +1806,7 @@ static void lo_create(fuse_req_t req, fuse_ino_t parent, const char *name,
|
|
}
|
|
|
|
fi->fh = fh;
|
|
- err = lo_do_lookup(req, parent, name, &e);
|
|
+ err = lo_do_lookup(req, parent, name, &e, NULL);
|
|
}
|
|
if (lo->cache == CACHE_NONE) {
|
|
fi->direct_io = 1;
|
|
--
|
|
2.18.2
|
|
|