Also for 3.2.
--b.
commit c856694e3d46976c76bf5b92091cb1efa211208d
Author: J. Bruce Fields <bfields@xxxxxxxxxx>
Date: Tue Sep 20 08:49:51 2011 -0400
nfsd4: make op_cacheresult another flag
I'm not sure why I used a new field for this originally.
Also, the differences between some of these flags are a little subtle;
add some comments to explain.
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index aa769df..4e41f65 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1013,14 +1013,15 @@ enum nfsd4_op_flags {
/* For rfc 5661 section 2.6.3.1.1: */
OP_HANDLES_WRONGSEC = 1 << 3,
OP_IS_PUTFH_LIKE = 1 << 4,
- OP_MODIFIES_SOMETHING = 1 << 5, /* op is non-idempotent */
-};
-
-struct nfsd4_operation {
- nfsd4op_func op_func;
- u32 op_flags;
- char *op_name;
/*
+ * These are the ops whose result size we estimate before
+ * encoding, to avoid performing an op then not being able to
+ * respond or cache a response. This includes writes and setattrs
+ * as well as the operations usually called "nonidempotent":
+ */
+ OP_MODIFIES_SOMETHING = 1 << 5,
+ /*
+ * Cache compounds containing these ops in the xid-based drc:
* We use the DRC for compounds containing non-idempotent
* operations, *except* those that are 4.1-specific (since
* sessions provide their own EOS), and except for stateful
@@ -1028,7 +1029,13 @@ struct nfsd4_operation {
* (since sequence numbers provide EOS for open, lock, etc in
* the v4.0 case).
*/
- bool op_cacheresult;
+ OP_CACHEME = 1 << 6,
+};
+
+struct nfsd4_operation {
+ nfsd4op_func op_func;
+ u32 op_flags;
+ char *op_name;
/* Try to get response size before operation */
nfsd4op_rsize op_rsize_bop;
};
@@ -1077,7 +1084,7 @@ static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
bool nfsd4_cache_this_op(struct nfsd4_op *op)
{
- return OPDESC(op)->op_cacheresult;
+ return OPDESC(op)->op_flags & OP_CACHEME;
}
static bool need_wrongsec_check(struct svc_rqst *rqstp)
@@ -1420,9 +1427,8 @@ static struct nfsd4_operation nfsd4_ops[] = {
},
[OP_CREATE] = {
.op_func = (nfsd4op_func)nfsd4_create,
- .op_flags = OP_MODIFIES_SOMETHING,
+ .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_CREATE",
- .op_cacheresult = true,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
},
[OP_DELEGRETURN] = {
@@ -1442,9 +1448,9 @@ static struct nfsd4_operation nfsd4_ops[] = {
},
[OP_LINK] = {
.op_func = (nfsd4op_func)nfsd4_link,
- .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING,
+ .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
+ | OP_CACHEME,
.op_name = "OP_LINK",
- .op_cacheresult = true,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
},
[OP_LOCK] = {
@@ -1534,16 +1540,14 @@ static struct nfsd4_operation nfsd4_ops[] = {
},
[OP_REMOVE] = {
.op_func = (nfsd4op_func)nfsd4_remove,
- .op_flags = OP_MODIFIES_SOMETHING,
+ .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_REMOVE",
- .op_cacheresult = true,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
},
[OP_RENAME] = {
.op_func = (nfsd4op_func)nfsd4_rename,
- .op_flags = OP_MODIFIES_SOMETHING,
+ .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_RENAME",
- .op_cacheresult = true,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
},
[OP_RENEW] = {
@@ -1575,24 +1579,21 @@ static struct nfsd4_operation nfsd4_ops[] = {
[OP_SETATTR] = {
.op_func = (nfsd4op_func)nfsd4_setattr,
.op_name = "OP_SETATTR",
- .op_flags = OP_MODIFIES_SOMETHING,
- .op_cacheresult = true,
+ .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
},
[OP_SETCLIENTID] = {
.op_func = (nfsd4op_func)nfsd4_setclientid,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
- | OP_MODIFIES_SOMETHING,
+ | OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_SETCLIENTID",
- .op_cacheresult = true,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
},
[OP_SETCLIENTID_CONFIRM] = {
.op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
- | OP_MODIFIES_SOMETHING,
+ | OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_SETCLIENTID_CONFIRM",
- .op_cacheresult = true,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
[OP_VERIFY] = {
@@ -1601,9 +1602,8 @@ static struct nfsd4_operation nfsd4_ops[] = {
},
[OP_WRITE] = {
.op_func = (nfsd4op_func)nfsd4_write,
- .op_flags = OP_MODIFIES_SOMETHING,
+ .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_WRITE",
- .op_cacheresult = true,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
},
[OP_RELEASE_LOCKOWNER] = {
--
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