1 files changed, 87 insertions, 24 deletions

diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index be78e9378c03..142ab6aa2aa1 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -3,7 +3,7 @@
  * linux/fs/autofs/waitq.c
  *
  *  Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
- *  Copyright 2001-2003 Ian Kent <raven@themaw.net>
+ *  Copyright 2001-2006 Ian Kent <raven@themaw.net>
  *
  * This file is part of the Linux kernel and is made available under
  * the terms of the GNU General Public License, version 2, or at your
@@ -33,7 +33,7 @@ void autofs4_catatonic_mode(struct autofs_sb_info *sbi)
         sbi->catatonic = 1;
         wq = sbi->queues;
         sbi->queues = NULL;     /* Erase all wait queues */
-        while ( wq ) {
+        while (wq) {
                 nwq = wq->next;
                 wq->status = -ENOENT; /* Magic is gone - report failure */
                 kfree(wq->name);
@@ -45,7 +45,6 @@ void autofs4_catatonic_mode(struct autofs_sb_info *sbi)
                 fput(sbi->pipe);        /* Close the pipe */
                 sbi->pipe = NULL;
         }
-
         shrink_dcache_sb(sbi->sb);
 }
 
@@ -98,7 +97,10 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
 
         pkt.hdr.proto_version = sbi->version;
         pkt.hdr.type = type;
-        if (type == autofs_ptype_missing) {
+        switch (type) {
+        /* Kernel protocol v4 missing and expire packets */
+        case autofs_ptype_missing:
+        {
                 struct autofs_packet_missing *mp = &pkt.missing;
 
                 pktsz = sizeof(*mp);
@@ -107,7 +109,10 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
                 mp->len = wq->len;
                 memcpy(mp->name, wq->name, wq->len);
                 mp->name[wq->len] = '\0';
-        } else if (type == autofs_ptype_expire_multi) {
+                break;
+        }
+        case autofs_ptype_expire_multi:
+        {
                 struct autofs_packet_expire_multi *ep = &pkt.expire_multi;
 
                 pktsz = sizeof(*ep);
@@ -116,7 +121,34 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
                 ep->len = wq->len;
                 memcpy(ep->name, wq->name, wq->len);
                 ep->name[wq->len] = '\0';
-        } else {
+                break;
+        }
+        /*
+         * Kernel protocol v5 packet for handling indirect and direct
+         * mount missing and expire requests
+         */
+        case autofs_ptype_missing_indirect:
+        case autofs_ptype_expire_indirect:
+        case autofs_ptype_missing_direct:
+        case autofs_ptype_expire_direct:
+        {
+                struct autofs_v5_packet *packet = &pkt.v5_packet;
+
+                pktsz = sizeof(*packet);
+
+                packet->wait_queue_token = wq->wait_queue_token;
+                packet->len = wq->len;
+                memcpy(packet->name, wq->name, wq->len);
+                packet->name[wq->len] = '\0';
+                packet->dev = wq->dev;
+                packet->ino = wq->ino;
+                packet->uid = wq->uid;
+                packet->gid = wq->gid;
+                packet->pid = wq->pid;
+                packet->tgid = wq->tgid;
+                break;
+        }
+        default:
                 printk("autofs4_notify_daemon: bad type %d!\n", type);
                 return;
         }
@@ -162,21 +194,29 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 {
         struct autofs_wait_queue *wq;
         char *name;
-        int len, status;
+        unsigned int len = 0;
+        unsigned int hash = 0;
+        int status;
 
         /* In catatonic mode, we don't wait for nobody */
-        if ( sbi->catatonic )
+        if (sbi->catatonic)
                 return -ENOENT;
         
         name = kmalloc(NAME_MAX + 1, GFP_KERNEL);
         if (!name)
                 return -ENOMEM;
 
-        len = autofs4_getpath(sbi, dentry, &name);
-        if (!len) {
-                kfree(name);
-                return -ENOENT;
+        /* If this is a direct mount request create a dummy name */
+        if (IS_ROOT(dentry) && (sbi->type & AUTOFS_TYPE_DIRECT))
+                len = sprintf(name, "%p", dentry);
+        else {
+                len = autofs4_getpath(sbi, dentry, &name);
+                if (!len) {
+                        kfree(name);
+                        return -ENOENT;
+                }
         }
+        hash = full_name_hash(name, len);
 
         if (mutex_lock_interruptible(&sbi->wq_mutex)) {
                 kfree(name);
@@ -190,7 +230,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
                         break;
         }
 
-        if ( !wq ) {
+        if (!wq) {
                 /* Can't wait for an expire if there's no mount */
                 if (notify == NFY_NONE && !d_mountpoint(dentry)) {
                         kfree(name);
@@ -200,7 +240,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 
                 /* Create a new wait queue */
                 wq = kmalloc(sizeof(struct autofs_wait_queue),GFP_KERNEL);
-                if ( !wq ) {
+                if (!wq) {
                         kfree(name);
                         mutex_unlock(&sbi->wq_mutex);
                         return -ENOMEM;
@@ -212,12 +252,18 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
                 wq->next = sbi->queues;
                 sbi->queues = wq;
                 init_waitqueue_head(&wq->queue);
-                wq->hash = dentry->d_name.hash;
+                wq->hash = hash;
                 wq->name = name;
                 wq->len = len;
+                wq->dev = autofs4_get_dev(sbi);
+                wq->ino = autofs4_get_ino(sbi);
+                wq->uid = current->uid;
+                wq->gid = current->gid;
+                wq->pid = current->pid;
+                wq->tgid = current->tgid;
                 wq->status = -EINTR; /* Status return if interrupted */
                 atomic_set(&wq->wait_ctr, 2);
-                atomic_set(&wq->notified, 1);
+                atomic_set(&wq->notify, 1);
                 mutex_unlock(&sbi->wq_mutex);
         } else {
                 atomic_inc(&wq->wait_ctr);
@@ -227,9 +273,26 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
                         (unsigned long) wq->wait_queue_token, wq->len, wq->name, notify);
         }
 
-        if (notify != NFY_NONE && atomic_dec_and_test(&wq->notified)) {
-                int type = (notify == NFY_MOUNT ?
-                        autofs_ptype_missing : autofs_ptype_expire_multi);
+        if (notify != NFY_NONE && atomic_read(&wq->notify)) {
+                int type;
+
+                atomic_dec(&wq->notify);
+
+                if (sbi->version < 5) {
+                        if (notify == NFY_MOUNT)
+                                type = autofs_ptype_missing;
+                        else
+                                type = autofs_ptype_expire_multi;
+                } else {
+                        if (notify == NFY_MOUNT)
+                                type = (sbi->type & AUTOFS_TYPE_DIRECT) ?
+                                        autofs_ptype_missing_direct :
+                                         autofs_ptype_missing_indirect;
+                        else
+                                type = (sbi->type & AUTOFS_TYPE_DIRECT) ?
+                                        autofs_ptype_expire_direct :
+                                        autofs_ptype_expire_indirect;
+                }
 
                 DPRINTK("new wait id = 0x%08lx, name = %.*s, nfy=%d\n",
                         (unsigned long) wq->wait_queue_token, wq->len, wq->name, notify);
@@ -240,14 +303,14 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 
         /* wq->name is NULL if and only if the lock is already released */
 
-        if ( sbi->catatonic ) {
+        if (sbi->catatonic) {
                 /* We might have slept, so check again for catatonic mode */
                 wq->status = -ENOENT;
                 kfree(wq->name);
                 wq->name = NULL;
         }
 
-        if ( wq->name ) {
+        if (wq->name) {
                 /* Block all but "shutdown" signals while waiting */
                 sigset_t oldset;
                 unsigned long irqflags;
@@ -283,12 +346,12 @@ int autofs4_wait_release(struct autofs_sb_info *sbi, autofs_wqt_t wait_queue_tok
         struct autofs_wait_queue *wq, **wql;
 
         mutex_lock(&sbi->wq_mutex);
-        for ( wql = &sbi->queues ; (wq = *wql) != 0 ; wql = &wq->next ) {
-                if ( wq->wait_queue_token == wait_queue_token )
+        for (wql = &sbi->queues ; (wq = *wql) != 0 ; wql = &wq->next) {
+                if (wq->wait_queue_token == wait_queue_token)
                         break;
         }
 
-        if ( !wq ) {
+        if (!wq) {
                 mutex_unlock(&sbi->wq_mutex);
                 return -EINVAL;
         }