[PATCH] autofs4: add a show mount options for proc filesystem
Add show_options method to display autofs4 mount options in the proc
filesystem.
Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 2335b1d..d9a71da 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -13,6 +13,7 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/file.h>
+#include <linux/seq_file.h>
#include <linux/pagemap.h>
#include <linux/parser.h>
#include <linux/bitops.h>
@@ -163,9 +164,26 @@
DPRINTK("shutting down");
}
+static int autofs4_show_options(struct seq_file *m, struct vfsmount *mnt)
+{
+ struct autofs_sb_info *sbi = autofs4_sbi(mnt->mnt_sb);
+
+ if (!sbi)
+ return 0;
+
+ seq_printf(m, ",fd=%d", sbi->pipefd);
+ seq_printf(m, ",pgrp=%d", sbi->oz_pgrp);
+ seq_printf(m, ",timeout=%lu", sbi->exp_timeout/HZ);
+ seq_printf(m, ",minproto=%d", sbi->min_proto);
+ seq_printf(m, ",maxproto=%d", sbi->max_proto);
+
+ return 0;
+}
+
static struct super_operations autofs4_sops = {
.put_super = autofs4_put_super,
.statfs = simple_statfs,
+ .show_options = autofs4_show_options,
};
enum {Opt_err, Opt_fd, Opt_uid, Opt_gid, Opt_pgrp, Opt_minproto, Opt_maxproto};
@@ -261,7 +279,6 @@
int pipefd;
struct autofs_sb_info *sbi;
struct autofs_info *ino;
- int minproto, maxproto;
sbi = (struct autofs_sb_info *) kmalloc(sizeof(*sbi), GFP_KERNEL);
if ( !sbi )
@@ -273,12 +290,15 @@
s->s_fs_info = sbi;
sbi->magic = AUTOFS_SBI_MAGIC;
sbi->root = NULL;
+ sbi->pipefd = -1;
sbi->catatonic = 0;
sbi->exp_timeout = 0;
sbi->oz_pgrp = process_group(current);
sbi->sb = s;
sbi->version = 0;
sbi->sub_version = 0;
+ sbi->min_proto = 0;
+ sbi->max_proto = 0;
mutex_init(&sbi->wq_mutex);
spin_lock_init(&sbi->fs_lock);
sbi->queues = NULL;
@@ -311,22 +331,26 @@
if (parse_options(data, &pipefd,
&root_inode->i_uid, &root_inode->i_gid,
&sbi->oz_pgrp,
- &minproto, &maxproto)) {
+ &sbi->min_proto, &sbi->max_proto)) {
printk("autofs: called with bogus options\n");
goto fail_dput;
}
/* Couldn't this be tested earlier? */
- if (maxproto < AUTOFS_MIN_PROTO_VERSION ||
- minproto > AUTOFS_MAX_PROTO_VERSION) {
+ if (sbi->max_proto < AUTOFS_MIN_PROTO_VERSION ||
+ sbi->min_proto > AUTOFS_MAX_PROTO_VERSION) {
printk("autofs: kernel does not match daemon version "
"daemon (%d, %d) kernel (%d, %d)\n",
- minproto, maxproto,
+ sbi->min_proto, sbi->max_proto,
AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION);
goto fail_dput;
}
- sbi->version = maxproto > AUTOFS_MAX_PROTO_VERSION ? AUTOFS_MAX_PROTO_VERSION : maxproto;
+ /* Establish highest kernel protocol version */
+ if (sbi->max_proto > AUTOFS_MAX_PROTO_VERSION)
+ sbi->version = AUTOFS_MAX_PROTO_VERSION;
+ else
+ sbi->version = sbi->max_proto;
sbi->sub_version = AUTOFS_PROTO_SUBVERSION;
DPRINTK("pipe fd = %d, pgrp = %u", pipefd, sbi->oz_pgrp);
@@ -339,6 +363,7 @@
if ( !pipe->f_op || !pipe->f_op->write )
goto fail_fput;
sbi->pipe = pipe;
+ sbi->pipefd = pipefd;
/*
* Take a reference to the root dentry so we get a chance to