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Disable zfs /etc/mtab updates

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Completely disable the zfs binary from attempting to directly update
/etc/mtab.  The Linux port relies entirely on the mount.zfs helper
to safely update /etc/mtab.  If we left the /etc/mtab updates to
the zfs binary then they could race with concurrent non-zfs mounts.
Routing everything through the system mount command ensures the
/etc/mtab updates are locked properly.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #329
This commit is contained in:
Brian Behlendorf 2011-07-21 12:39:42 -07:00
parent ddd052aa83
commit b740d602bd
1 changed files with 1 additions and 2 deletions
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3
cmd/zfs/zfs_main.c
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@ -6177,7 +6177,7 @@ main(int argc, char **argv)
/*
* Run the appropriate command.
*/
libzfs_mnttab_cache(g_zfs, B_TRUE);
libzfs_mnttab_cache(g_zfs, B_FALSE);
if (find_command_idx(cmdname, &i) == 0) {
current_command = &command_table[i];
ret = command_table[i].func(argc - 1, argv + 1);
@ -6191,7 +6191,6 @@ main(int argc, char **argv)
usage(B_FALSE);
ret = 1;
}
libzfs_mnttab_cache(g_zfs, B_FALSE);
libzfs_fini(g_zfs);
(void) fclose(mnttab_file);