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9pfs/xen: Fix segfault on shutdown

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xen_9pfs_free can't use gnttabdev since it is already closed and NULL-ed
out when free is called.  Do the teardown in _disconnect().  This
matches the setup done in _connect().

trace-events are also added for the XenDevOps functions.

Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Message-Id: <20230502143722.15613-1-jandryuk@gmail.com>
[C.S.: - Remove redundant return in xen_9pfs_free().
       - Add comment to trace-events. ]
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
This commit is contained in:
Jason Andryuk 2023-05-02 10:37:22 -04:00 • committed by Christian Schoenebeck
parent f91ce58cb2
commit 92e667f6fd
2 changed files with 28 additions and 13 deletions
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6
hw/9pfs/trace-events
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@ -48,3 +48,9 @@ v9fs_readlink(uint16_t tag, uint8_t id, int32_t fid) "tag %d id %d fid %d"
v9fs_readlink_return(uint16_t tag, uint8_t id, char* target) "tag %d id %d name %s"
v9fs_setattr(uint16_t tag, uint8_t id, int32_t fid, int32_t valid, int32_t mode, int32_t uid, int32_t gid, int64_t size, int64_t atime_sec, int64_t mtime_sec) "tag %u id %u fid %d iattr={valid %d mode %d uid %d gid %d size %"PRId64" atime=%"PRId64" mtime=%"PRId64" }"
v9fs_setattr_return(uint16_t tag, uint8_t id) "tag %u id %u"
# xen-9p-backend.c
xen_9pfs_alloc(char *name) "name %s"
xen_9pfs_connect(char *name) "name %s"
xen_9pfs_disconnect(char *name) "name %s"
xen_9pfs_free(char *name) "name %s"