diff options
| author | Csaba Henk <csaba@gluster.com> | 2011-05-15 04:52:33 +0000 |
|---|---|---|
| committer | Anand Avati <avati@gluster.com> | 2011-05-19 15:41:47 -0700 |
| commit | c5d781e05599e9e7ad736d42c9c1033992c76ded (patch) | |
| tree | aff88649bc98a6c8babc3d75760fae2ef36b4cc3 /glusterfsd/src/glusterfsd.c | |
| parent | 357df32e16dd21e7aedb699c7bd99cac9b95a040 (diff) | |
upon daemonizing, wait on mtab update to terminate in parent
This fixes the race in between the mtab update attempts of mount and umount
when we do a lazy umount right after mounting, in order to hide the given fs
instance; yet this way we still avoid the deadlock of the fs and mount which
we can hit if we wait unconditionally for the mtab update to terminate (cf.
bz #511).
Signed-off-by: Csaba Henk <csaba@gluster.com>
Signed-off-by: Anand Avati <avati@gluster.com>
BUG: 2690 (race between mtab updates of mount and umount)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=2690
Diffstat (limited to 'glusterfsd/src/glusterfsd.c')
| -rw-r--r-- | glusterfsd/src/glusterfsd.c | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/glusterfsd/src/glusterfsd.c b/glusterfsd/src/glusterfsd.c index 9406d74ac63..2d2024409ee 100644 --- a/glusterfsd/src/glusterfsd.c +++ b/glusterfsd/src/glusterfsd.c @@ -25,6 +25,7 @@ #include <sys/types.h> #include <sys/resource.h> #include <sys/file.h> +#include <sys/wait.h> #include <netdb.h> #include <signal.h> #include <libgen.h> @@ -75,11 +76,7 @@ #include <fnmatch.h> #include "rpc-clnt.h" -#ifdef GF_DARWIN_HOST_OS #include "daemon.h" -#else -#define os_daemon(u, v) daemon (u, v) -#endif /* using argp for command line parsing */ @@ -315,6 +312,16 @@ create_fuse_mount (glusterfs_ctx_t *ctx) break; } + if (!cmd_args->no_daemon_mode) { + ret = dict_set_static_ptr (master->options, "sync-mtab", + "enable"); + if (ret < 0) { + gf_log ("glusterfsd", GF_LOG_ERROR, + "failed to set dict value for key sync-mtab"); + goto err; + } + } + ret = xlator_init (master); if (ret) { gf_log ("", GF_LOG_DEBUG, "failed to initialize fuse translator"); @@ -1310,6 +1317,7 @@ daemonize (glusterfs_ctx_t *ctx) { int ret = -1; cmd_args_t *cmd_args = NULL; + int cstatus = 0; cmd_args = &ctx->cmd_args; @@ -1323,11 +1331,24 @@ daemonize (glusterfs_ctx_t *ctx) if (cmd_args->debug_mode) goto postfork; - ret = os_daemon (0, 0); - if (ret == -1) { + ret = os_daemon_return (0, 0); + switch (ret) { + case -1: gf_log ("daemonize", GF_LOG_ERROR, "Daemonization failed: %s", strerror(errno)); goto out; + case 0: + break; + default: + if (ctx->mtab_pid > 0) { + ret = waitpid (ctx->mtab_pid, &cstatus, 0); + if (!(ret == ctx->mtab_pid && cstatus == 0)) { + gf_log ("daemonize", GF_LOG_ERROR, + "/etc/mtab update failed"); + exit (1); + } + } + _exit (0); } postfork: |