[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen master] tools/xenstore: add TDB access trace support
commit ff7509c2b7137a2ae42eb54c12becff04b1f79ad Author: Juergen Gross <jgross@xxxxxxxx> AuthorDate: Tue May 30 10:24:19 2023 +0200 Commit: Julien Grall <jgrall@xxxxxxxxxx> CommitDate: Wed Jun 7 12:10:31 2023 +0100 tools/xenstore: add TDB access trace support Add a new trace switch "tdb" and the related trace calls. The "tdb" switch is off per default. Signed-off-by: Juergen Gross <jgross@xxxxxxxx> Reviewed-by: Julien Grall <jgrall@xxxxxxxxxx> --- tools/xenstore/xenstored_core.c | 8 +++++++- tools/xenstore/xenstored_core.h | 7 +++++++ tools/xenstore/xenstored_transaction.c | 7 ++++++- 3 files changed, 20 insertions(+), 2 deletions(-) diff --git a/tools/xenstore/xenstored_core.c b/tools/xenstore/xenstored_core.c index eb916b0647..069c03d4b0 100644 --- a/tools/xenstore/xenstored_core.c +++ b/tools/xenstore/xenstored_core.c @@ -589,6 +589,8 @@ static void get_acc_data(TDB_DATA *key, struct node_account_data *acc) if (old_data.dptr == NULL) { acc->memory = 0; } else { + trace_tdb("read %s size %zu\n", key->dptr, + old_data.dsize + key->dsize); hdr = (void *)old_data.dptr; acc->memory = old_data.dsize; acc->domid = hdr->perms[0].id; @@ -655,6 +657,7 @@ int do_tdb_write(struct connection *conn, TDB_DATA *key, TDB_DATA *data, errno = EIO; return errno; } + trace_tdb("store %s size %zu\n", key->dptr, data->dsize + key->dsize); if (acc) { /* Don't use new_domid, as it might be a transaction node. */ @@ -682,6 +685,7 @@ int do_tdb_delete(struct connection *conn, TDB_DATA *key, errno = EIO; return errno; } + trace_tdb("delete %s\n", key->dptr); if (acc->memory) { domid = get_acc_domid(conn, key, acc->domid); @@ -731,6 +735,8 @@ struct node *read_node(struct connection *conn, const void *ctx, goto error; } + trace_tdb("read %s size %zu\n", key.dptr, data.dsize + key.dsize); + node->parent = NULL; talloc_steal(node, data.dptr); @@ -2756,7 +2762,7 @@ static void set_quota(const char *arg, bool soft) /* Sorted by bit values of TRACE_* flags. Flag is (1u << index). */ const char *const trace_switches[] = { - "obj", "io", "wrl", "acc", + "obj", "io", "wrl", "acc", "tdb", NULL }; diff --git a/tools/xenstore/xenstored_core.h b/tools/xenstore/xenstored_core.h index 3e0734a6c6..5a11dc1231 100644 --- a/tools/xenstore/xenstored_core.h +++ b/tools/xenstore/xenstored_core.h @@ -303,9 +303,16 @@ extern unsigned int trace_flags; #define TRACE_IO 0x00000002 #define TRACE_WRL 0x00000004 #define TRACE_ACC 0x00000008 +#define TRACE_TDB 0x00000010 extern const char *const trace_switches[]; int set_trace_switch(const char *arg); +#define trace_tdb(...) \ +do { \ + if (trace_flags & TRACE_TDB) \ + trace("tdb: " __VA_ARGS__); \ +} while (0) + extern TDB_CONTEXT *tdb_ctx; extern int dom0_domid; extern int dom0_event; diff --git a/tools/xenstore/xenstored_transaction.c b/tools/xenstore/xenstored_transaction.c index 2b15506953..11c8bcec84 100644 --- a/tools/xenstore/xenstored_transaction.c +++ b/tools/xenstore/xenstored_transaction.c @@ -374,8 +374,11 @@ static int finalize_transaction(struct connection *conn, if (tdb_error(tdb_ctx) != TDB_ERR_NOEXIST) return EIO; gen = NO_GENERATION; - } else + } else { + trace_tdb("read %s size %zu\n", key.dptr, + key.dsize + data.dsize); gen = hdr->generation; + } talloc_free(data.dptr); if (i->generation != gen) return EAGAIN; @@ -399,6 +402,8 @@ static int finalize_transaction(struct connection *conn, set_tdb_key(i->trans_name, &ta_key); data = tdb_fetch(tdb_ctx, ta_key); if (data.dptr) { + trace_tdb("read %s size %zu\n", ta_key.dptr, + ta_key.dsize + data.dsize); hdr = (void *)data.dptr; hdr->generation = ++generation; *is_corrupt |= do_tdb_write(conn, &key, &data, -- generated by git-patchbot for /home/xen/git/xen.git#master
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