Fix up over-eager 'wait_queue_t' renaming

Commit ac6424b981 ("sched/wait: Rename wait_queue_t =>
wait_queue_entry_t") had scripted the renaming incorrectly, and didn't
actually check that the 'wait_queue_t' was a full token.

As a result, it also triggered on 'wait_queue_token', and renamed that
to 'wait_queue_entry_token' entry in the autofs4 packet structure
definition too.  That was entirely incorrect, and not intended.

The end result built fine when building just the kernel - because
everything had been renamed consistently there - but caused problems in
user space because the "struct autofs_packet_missing" type is exported
as part of the uapi.

This scripts it all back again:

    git grep -lw wait_queue_entry_token |
        xargs sed -i 's/wait_queue_entry_token/wait_queue_token/g'

and checks the end result.

Reported-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Fixes: ac6424b981 ("sched/wait: Rename wait_queue_t => wait_queue_entry_t")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2017-07-10 11:40:19 -07:00
parent 9eb7888005
commit 7cee9384cb
5 changed files with 20 additions and 20 deletions

View file

@ -316,7 +316,7 @@ For version 5, the format of the message is:
struct autofs_v5_packet {
int proto_version; /* Protocol version */
int type; /* Type of packet */
autofs_wqt_t wait_queue_entry_token;
autofs_wqt_t wait_queue_token;
__u32 dev;
__u64 ino;
__u32 uid;
@ -341,12 +341,12 @@ The pipe will be set to "packet mode" (equivalent to passing
`O_DIRECT`) to _pipe2(2)_ so that a read from the pipe will return at
most one packet, and any unread portion of a packet will be discarded.
The `wait_queue_entry_token` is a unique number which can identify a
The `wait_queue_token` is a unique number which can identify a
particular request to be acknowledged. When a message is sent over
the pipe the affected dentry is marked as either "active" or
"expiring" and other accesses to it block until the message is
acknowledged using one of the ioctls below and the relevant
`wait_queue_entry_token`.
`wait_queue_token`.
Communicating with autofs: root directory ioctls
------------------------------------------------
@ -358,7 +358,7 @@ capability, or must be the automount daemon.
The available ioctl commands are:
- **AUTOFS_IOC_READY**: a notification has been handled. The argument
to the ioctl command is the "wait_queue_entry_token" number
to the ioctl command is the "wait_queue_token" number
corresponding to the notification being acknowledged.
- **AUTOFS_IOC_FAIL**: similar to above, but indicates failure with
the error code `ENOENT`.
@ -382,14 +382,14 @@ The available ioctl commands are:
struct autofs_packet_expire_multi {
int proto_version; /* Protocol version */
int type; /* Type of packet */
autofs_wqt_t wait_queue_entry_token;
autofs_wqt_t wait_queue_token;
int len;
char name[NAME_MAX+1];
};
is required. This is filled in with the name of something
that can be unmounted or removed. If nothing can be expired,
`errno` is set to `EAGAIN`. Even though a `wait_queue_entry_token`
`errno` is set to `EAGAIN`. Even though a `wait_queue_token`
is present in the structure, no "wait queue" is established
and no acknowledgment is needed.
- **AUTOFS_IOC_EXPIRE_MULTI**: This is similar to

View file

@ -83,7 +83,7 @@ struct autofs_info {
struct autofs_wait_queue {
wait_queue_head_t queue;
struct autofs_wait_queue *next;
autofs_wqt_t wait_queue_entry_token;
autofs_wqt_t wait_queue_token;
/* We use the following to see what we are waiting for */
struct qstr name;
u32 dev;

View file

@ -104,7 +104,7 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
size_t pktsz;
pr_debug("wait id = 0x%08lx, name = %.*s, type=%d\n",
(unsigned long) wq->wait_queue_entry_token,
(unsigned long) wq->wait_queue_token,
wq->name.len, wq->name.name, type);
memset(&pkt, 0, sizeof(pkt)); /* For security reasons */
@ -120,7 +120,7 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
pktsz = sizeof(*mp);
mp->wait_queue_entry_token = wq->wait_queue_entry_token;
mp->wait_queue_token = wq->wait_queue_token;
mp->len = wq->name.len;
memcpy(mp->name, wq->name.name, wq->name.len);
mp->name[wq->name.len] = '\0';
@ -133,7 +133,7 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
pktsz = sizeof(*ep);
ep->wait_queue_entry_token = wq->wait_queue_entry_token;
ep->wait_queue_token = wq->wait_queue_token;
ep->len = wq->name.len;
memcpy(ep->name, wq->name.name, wq->name.len);
ep->name[wq->name.len] = '\0';
@ -153,7 +153,7 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
pktsz = sizeof(*packet);
packet->wait_queue_entry_token = wq->wait_queue_entry_token;
packet->wait_queue_token = wq->wait_queue_token;
packet->len = wq->name.len;
memcpy(packet->name, wq->name.name, wq->name.len);
packet->name[wq->name.len] = '\0';
@ -428,7 +428,7 @@ int autofs4_wait(struct autofs_sb_info *sbi,
return -ENOMEM;
}
wq->wait_queue_entry_token = autofs4_next_wait_queue;
wq->wait_queue_token = autofs4_next_wait_queue;
if (++autofs4_next_wait_queue == 0)
autofs4_next_wait_queue = 1;
wq->next = sbi->queues;
@ -461,7 +461,7 @@ int autofs4_wait(struct autofs_sb_info *sbi,
}
pr_debug("new wait id = 0x%08lx, name = %.*s, nfy=%d\n",
(unsigned long) wq->wait_queue_entry_token, wq->name.len,
(unsigned long) wq->wait_queue_token, wq->name.len,
wq->name.name, notify);
/*
@ -471,7 +471,7 @@ int autofs4_wait(struct autofs_sb_info *sbi,
} else {
wq->wait_ctr++;
pr_debug("existing wait id = 0x%08lx, name = %.*s, nfy=%d\n",
(unsigned long) wq->wait_queue_entry_token, wq->name.len,
(unsigned long) wq->wait_queue_token, wq->name.len,
wq->name.name, notify);
mutex_unlock(&sbi->wq_mutex);
kfree(qstr.name);
@ -550,13 +550,13 @@ int autofs4_wait(struct autofs_sb_info *sbi,
}
int autofs4_wait_release(struct autofs_sb_info *sbi, autofs_wqt_t wait_queue_entry_token, int status)
int autofs4_wait_release(struct autofs_sb_info *sbi, autofs_wqt_t wait_queue_token, int status)
{
struct autofs_wait_queue *wq, **wql;
mutex_lock(&sbi->wq_mutex);
for (wql = &sbi->queues; (wq = *wql) != NULL; wql = &wq->next) {
if (wq->wait_queue_entry_token == wait_queue_entry_token)
if (wq->wait_queue_token == wait_queue_token)
break;
}

View file

@ -26,7 +26,7 @@
#define AUTOFS_MIN_PROTO_VERSION AUTOFS_PROTO_VERSION
/*
* The wait_queue_entry_token (autofs_wqt_t) is part of a structure which is passed
* The wait_queue_token (autofs_wqt_t) is part of a structure which is passed
* back to the kernel via ioctl from userspace. On architectures where 32- and
* 64-bit userspace binaries can be executed it's important that the size of
* autofs_wqt_t stays constant between 32- and 64-bit Linux kernels so that we
@ -49,7 +49,7 @@ struct autofs_packet_hdr {
struct autofs_packet_missing {
struct autofs_packet_hdr hdr;
autofs_wqt_t wait_queue_entry_token;
autofs_wqt_t wait_queue_token;
int len;
char name[NAME_MAX+1];
};

View file

@ -108,7 +108,7 @@ enum autofs_notify {
/* v4 multi expire (via pipe) */
struct autofs_packet_expire_multi {
struct autofs_packet_hdr hdr;
autofs_wqt_t wait_queue_entry_token;
autofs_wqt_t wait_queue_token;
int len;
char name[NAME_MAX+1];
};
@ -123,7 +123,7 @@ union autofs_packet_union {
/* autofs v5 common packet struct */
struct autofs_v5_packet {
struct autofs_packet_hdr hdr;
autofs_wqt_t wait_queue_entry_token;
autofs_wqt_t wait_queue_token;
__u32 dev;
__u64 ino;
__u32 uid;