[PATCH 5/8] autofs - change autofs4_wait() to take struct path

Ian Kent
2016-10-11T05:35:12Z

From: Ian Kent <ikent@redhat.com>

In order to use the functions path_is_mountpoint() (or its rcu-walk
variant) and path_has_submounts() autofs needs to pass a struct path
in several places.

Now change autofs4_wait() to take a struct path instead of a struct
dentry.

Signed-off-by: Ian Kent <raven@themaw.net>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Omar Sandoval <osandov@osandov.com>
---
fs/autofs4/autofs_i.h | 2 +-
fs/autofs4/expire.c | 5 +++--
fs/autofs4/root.c | 16 ++++++++--------
fs/autofs4/waitq.c | 3 ++-
4 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index 6d72bba..14cef41 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -217,7 +217,7 @@ static inline int autofs_prepare_pipe(struct file *pipe)

/* Queue management functions */

-int autofs4_wait(struct autofs_sb_info *, struct dentry *, enum autofs_notify);
+int autofs4_wait(struct autofs_sb_info *, struct path *, enum autofs_notify);
int autofs4_wait_release(struct autofs_sb_info *, autofs_wqt_t, int);
void autofs4_catatonic_mode(struct autofs_sb_info *);

diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 7eac498..a37ba40 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -526,7 +526,7 @@ int autofs4_expire_wait(struct path *path, int rcu_walk)

pr_debug("waiting for expire %p name=%pd\n", dentry, dentry);

- status = autofs4_wait(sbi, dentry, NFY_NONE);
+ status = autofs4_wait(sbi, path, NFY_NONE);
wait_for_completion(&ino->expire_complete);

pr_debug("expire done status=%d\n", status);
@@ -593,11 +593,12 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,

if (dentry) {
struct autofs_info *ino = autofs4_dentry_ino(dentry);
+ struct path path = { .mnt = mnt, .dentry = dentry };

/* This is synchronous because it makes the daemon a
* little easier
*/
- ret = autofs4_wait(sbi, dentry, NFY_EXPIRE);
+ ret = autofs4_wait(sbi, &path, NFY_EXPIRE);

spin_lock(&sbi->fs_lock);
/* avoid rapid-fire expire attempts if expiry fails */
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 35096e3..d47930ad 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -269,17 +269,17 @@ static struct dentry *autofs4_lookup_expiring(struct dentry *dentry,
return NULL;
}

-static int autofs4_mount_wait(struct dentry *dentry, bool rcu_walk)
+static int autofs4_mount_wait(struct path *path, bool rcu_walk)
{
- struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
- struct autofs_info *ino = autofs4_dentry_ino(dentry);
+ struct autofs_sb_info *sbi = autofs4_sbi(path->dentry->d_sb);
+ struct autofs_info *ino = autofs4_dentry_ino(path->dentry);
int status = 0;

if (ino->flags & AUTOFS_INF_PENDING) {
if (rcu_walk)
return -ECHILD;
- pr_debug("waiting for mount name=%pd\n", dentry);
- status = autofs4_wait(sbi, dentry, NFY_MOUNT);
+ pr_debug("waiting for mount name=%pd\n", path->dentry);
+ status = autofs4_wait(sbi, path, NFY_MOUNT);
pr_debug("mount wait done status=%d\n", status);
}
ino->last_used = jiffies;
@@ -364,7 +364,7 @@ static struct vfsmount *autofs4_d_automount(struct path *path)
spin_lock(&sbi->fs_lock);
if (ino->flags & AUTOFS_INF_PENDING) {
spin_unlock(&sbi->fs_lock);
- status = autofs4_mount_wait(dentry, 0);
+ status = autofs4_mount_wait(path, 0);
if (status)
return ERR_PTR(status);
goto done;
@@ -405,7 +405,7 @@ static struct vfsmount *autofs4_d_automount(struct path *path)
}
ino->flags |= AUTOFS_INF_PENDING;
spin_unlock(&sbi->fs_lock);
- status = autofs4_mount_wait(dentry, 0);
+ status = autofs4_mount_wait(path, 0);
spin_lock(&sbi->fs_lock);
ino->flags &= ~AUTOFS_INF_PENDING;
if (status) {
@@ -447,7 +447,7 @@ static int autofs4_d_manage(struct path *path, bool rcu_walk)
* This dentry may be under construction so wait on mount
* completion.
*/
- status = autofs4_mount_wait(dentry, rcu_walk);
+ status = autofs4_mount_wait(path, rcu_walk);
if (status)
return status;

diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index 431fd7e..f757f87 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -345,8 +345,9 @@ static int validate_request(struct autofs_wait_queue **wait,
}

int autofs4_wait(struct autofs_sb_info *sbi,
- struct dentry *dentry, enum autofs_notify notify)
+ struct path *path, enum autofs_notify notify)
{
+ struct dentry *dentry = path->dentry;
struct autofs_wait_queue *wq;
struct qstr qstr;
char *name;