evin/ms-nfs41-client
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ref counting for nfs41_root

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very similar to the issue with nfs41_open_state, an abandoned upcall could outlive its mount. to prevent their nfs41_root from being freed, upcalls need to hold a reference until they're finished. this also keeps all of its clients/sessions/rpc connections alive

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2010-10-27 13:36:22 -04:00 • committed by unknown
parent 006bdfa47a
commit bcc707d3b8
13 changed files with 57 additions and 4 deletions
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11
daemon/nfs41.h
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@ -168,12 +168,18 @@ typedef struct __nfs41_session {
nfs41_cb_session cb_session;
} nfs41_session;
/* nfs41_root reference counting:
* similar to nfs41_open_state, the driver holds an implicit reference
* between MOUNT and UNMOUNT. all other upcalls use upcall_root_ref() on
* upcall_parse(), which prevents the root/clients from being freed and
* guarantees a matching deref on upcall_cleanup() */
typedef struct __nfs41_root {
client_owner4 client_owner;
CRITICAL_SECTION lock;
struct list_entry clients;
uint32_t wsize;
uint32_t rsize;
LONG ref_count;
} nfs41_root;
@ -184,7 +190,10 @@ int nfs41_root_create(
IN uint32_t rsize,
OUT nfs41_root **root_out);
void nfs41_root_free(
void nfs41_root_ref(
IN nfs41_root *root);
void nfs41_root_deref(
IN nfs41_root *root);
int nfs41_root_mount_addrs(