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authorCsaba Henk <csaba@redhat.com>2018-08-21 12:44:54 +0200
committerAmar Tumballi <amarts@redhat.com>2018-11-06 04:21:57 +0000
commit4c6b063463ae48b3509ff8e66cd391f8637a86af (patch)
tree267710e0564138d8e6072aaa229f28f44626bf88 /glusterfsd/src/glusterfsd.c
parentbceb9f25671e65cb2f0987a84370055e7c36900f (diff)
fuse: diagnostic FLUSH interrupt
We add dummy interrupt handling for the FLUSH fuse message. It can be enabled by the "--fuse-flush-handle-interrupt" hidden command line option, or "-ofuse-flush-handle-interrupt=yes" mount option. It serves no other than diagnostic & demonstational purposes -- to exercise the interrupt handling framework a bit and to give an usage example. Documentation is also provided that showcases interrupt handling via FLUSH. Change-Id: I522f1e798501d06b74ac3592a5f73c1ab0590c60 updates: #465 Signed-off-by: Csaba Henk <csaba@redhat.com>
Diffstat (limited to 'glusterfsd/src/glusterfsd.c')
-rw-r--r--glusterfsd/src/glusterfsd.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/glusterfsd/src/glusterfsd.c b/glusterfsd/src/glusterfsd.c
index dfef7922245..f62fbf5e7c4 100644
--- a/glusterfsd/src/glusterfsd.c
+++ b/glusterfsd/src/glusterfsd.c
@@ -264,6 +264,9 @@ static struct argp_option gf_options[] = {
OPTION_ARG_OPTIONAL,
"declare supported granularity of file attribute"
" times in nanoseconds"},
+ {"fuse-flush-handle-interrupt", ARGP_FUSE_FLUSH_HANDLE_INTERRUPT_KEY,
+ "BOOL", OPTION_ARG_OPTIONAL | OPTION_HIDDEN,
+ "handle interrupt in fuse FLUSH handler"},
{0, 0, 0, 0, "Miscellaneous Options:"},
{
0,
@@ -643,6 +646,31 @@ set_fuse_mount_options(glusterfs_ctx_t *ctx, dict_t *options)
goto err;
}
}
+ switch (cmd_args->fuse_flush_handle_interrupt) {
+ case GF_OPTION_ENABLE:
+ ret = dict_set_static_ptr(options, "flush-handle-interrupt", "on");
+ if (ret < 0) {
+ gf_msg("glusterfsd", GF_LOG_ERROR, 0, glusterfsd_msg_4,
+ "failed to set dict value for key "
+ "flush-handle-interrupt");
+ goto err;
+ }
+ break;
+ case GF_OPTION_DISABLE:
+ ret = dict_set_static_ptr(options, "flush-handle-interrupt", "off");
+ if (ret < 0) {
+ gf_msg("glusterfsd", GF_LOG_ERROR, 0, glusterfsd_msg_4,
+ "failed to set dict value for key "
+ "flush-handle-interrupt");
+ goto err;
+ }
+ break;
+ case GF_OPTION_DEFERRED: /* default */
+ default:
+ gf_msg_debug("glusterfsd", 0, "fuse-flush-handle-interrupt mode %d",
+ cmd_args->fuse_flush_handle_interrupt);
+ break;
+ }
ret = 0;
err:
@@ -1421,6 +1449,21 @@ parse_opts(int key, char *arg, struct argp_state *state)
}
break;
+
+ case ARGP_FUSE_FLUSH_HANDLE_INTERRUPT_KEY:
+ if (!arg)
+ arg = "yes";
+
+ if (gf_string2boolean(arg, &b) == 0) {
+ cmd_args->fuse_flush_handle_interrupt = b;
+
+ break;
+ }
+
+ argp_failure(state, -1, 0,
+ "unknown fuse flush handle interrupt setting \"%s\"",
+ arg);
+ break;
}
return 0;
}
@@ -1728,6 +1771,7 @@ glusterfs_ctx_defaults_init(glusterfs_ctx_t *ctx)
cmd_args->fuse_entry_timeout = -1;
cmd_args->fopen_keep_cache = GF_OPTION_DEFERRED;
cmd_args->kernel_writeback_cache = GF_OPTION_DEFERRED;
+ cmd_args->fuse_flush_handle_interrupt = GF_OPTION_DEFERRED;
if (ctx->mem_acct_enable)
cmd_args->mem_acct = 1;