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Commit c42ad4a3 authored by Treehugger Robot's avatar Treehugger Robot Committed by Automerger Merge Worker
Browse files

Merge "libcutils: Split uevent_open_socket()" into main am: 7cf5f081 

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3207011



Change-Id: Iac768cb7fcc4480070e553e56ce6929f7ef31eae
Signed-off-by: default avatarAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
parents e2a0bd6a 7cf5f081

libcutils/abi-dumps/arm64/source-based/libcutils.so.lsdump

+76 −142
Original line number Diff line number Diff line
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@@ -487,6 +450,12 @@ 
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@@ -502,22 +471,6 @@ 
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@@ -553,8 +506,6 @@ 
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@@ -575,9 +526,7 @@ 
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@@ -632,9 +577,7 @@ 
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@@ -2266,6 +2209,33 @@ 
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@@ -2374,7 +2344,6 @@ 
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@@ -2383,7 +2352,6 @@ 
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@@ -2392,7 +2360,6 @@ 
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@@ -2401,7 +2368,6 @@ 
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@@ -2410,7 +2376,6 @@ 
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@@ -2419,7 +2384,6 @@ 
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   "source_file" : "system/core/libcutils/include/private/fs_config.h"

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@@ -2428,7 +2392,6 @@ 
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   "source_file" : "system/core/libcutils/include/cutils/str_parms.h"

  },
@@ -2437,7 +2400,6 @@ 
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@@ -2446,7 +2408,6 @@ 
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   "name" : "bool (*)(void *, void *, void *)",

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   "source_file" : "system/core/libcutils/include/cutils/hashmap.h"

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@@ -2455,7 +2416,6 @@ 
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@@ -2464,7 +2424,6 @@ 
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   "size" : 8,

   "source_file" : "system/core/libcutils/include/cutils/properties.h"

  },
@@ -2473,7 +2432,6 @@ 
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  },
@@ -2482,7 +2440,6 @@ 
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   "name" : "const cutils_socket_buffer_t *",

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   "size" : 8,

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@@ -2491,7 +2448,6 @@ 
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   "source_file" : "system/core/libcutils/include/cutils/klog.h"

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@@ -2500,7 +2456,6 @@ 
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   "source_file" : "system/core/libcutils/include/cutils/config_utils.h"

  },
@@ -2509,7 +2464,6 @@ 
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   "size" : 8,

   "source_file" : "system/core/libcutils/include/cutils/sockets.h"

  },
@@ -2518,7 +2472,6 @@ 
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   "self_type" : "_ZTIPPv",

   "size" : 8,

   "source_file" : "system/core/libcutils/include/cutils/record_stream.h"

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@@ -2527,7 +2480,6 @@ 
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@@ -2536,7 +2488,6 @@ 
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@@ -2545,7 +2496,6 @@ 
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   "size" : 8,

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  },
@@ -2554,7 +2504,6 @@ 
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@@ -2563,7 +2512,6 @@ 
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@@ -2572,7 +2520,6 @@ 
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@@ -2585,7 +2532,6 @@ 
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@@ -2595,7 +2541,6 @@ 
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@@ -2605,7 +2550,6 @@ 
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@@ -2624,7 +2567,6 @@ 
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@@ -2656,8 +2598,6 @@ 
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@@ -2677,8 +2617,6 @@ 
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@@ -2713,8 +2651,6 @@ 
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@@ -2744,8 +2680,6 @@ 
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libcutils/abi-dumps/arm_arm64/source-based/libcutils.so.lsdump

+64 −144

File changed.

Preview size limit exceeded, changes collapsed.

libcutils/include/cutils/uevent.h

+2 −0
Original line number Diff line number Diff line
@@ -24,6 +24,8 @@ 
extern "C" {

#endif



int uevent_create_socket(int buf_sz, bool passcred);

int uevent_bind(int socket);

int uevent_open_socket(int buf_sz, bool passcred);

ssize_t uevent_kernel_multicast_recv(int socket, void *buffer, size_t length);

ssize_t uevent_kernel_multicast_uid_recv(int socket, void *buffer, size_t length, uid_t *uid);

libcutils/uevent.cpp

+49 −13
Original line number Diff line number Diff line
@@ -92,20 +92,22 @@ out: 
    return -1;

}



int uevent_open_socket(int buf_sz, bool passcred) {

    struct sockaddr_nl addr;

    int on = passcred;

/*

 * Creates an unbound netlink socket for receiving uevent messages.

 * @buf_sz: socket receive buffer size.

 * @passcred: whether or not to enable receiving the SCM_CREDENTIALS control

 *	message.

 *

 * Returns: a socket descriptor upon success or -1 upon failure.

 */

int uevent_create_socket(int buf_sz, bool passcred) {

    int s = socket(PF_NETLINK, SOCK_DGRAM | SOCK_CLOEXEC, NETLINK_KOBJECT_UEVENT);

    if (s < 0) {

        return -1;

    }



    int buf_sz_readback = 0;

    socklen_t optlen = sizeof(buf_sz_readback);

    int s;



    memset(&addr, 0, sizeof(addr));

    addr.nl_family = AF_NETLINK;

    addr.nl_pid = 0;

    addr.nl_groups = 0xffffffff;



    s = socket(PF_NETLINK, SOCK_DGRAM | SOCK_CLOEXEC, NETLINK_KOBJECT_UEVENT);

    if (s < 0) return -1;



    if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &buf_sz, sizeof(buf_sz)) < 0 ||

          getsockopt(s, SOL_SOCKET, SO_RCVBUF, &buf_sz_readback, &optlen) < 0) {
@@ -123,9 +125,43 @@ int uevent_open_socket(int buf_sz, bool passcred) { 
        }

    }



    int on = passcred;



    setsockopt(s, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on));



    if (bind(s, (struct sockaddr*)&addr, sizeof(addr)) < 0) {

    return s;

}



/*

 * Binds a netlink socket. Binding a netlink socket makes the kernel start

 * sending netlink messages to that netlink socket.

 *

 * Returns: 0 upon success; -1 upon error.

 */

int uevent_bind(int socket) {

    struct sockaddr_nl addr = {

            .nl_family = AF_NETLINK,

            .nl_pid = 0,

            .nl_groups = 0xffffffff,

    };

    return bind(socket, (struct sockaddr*)&addr, sizeof(addr));

}



/*

 * Creates a bound netlink socket for receiving uevent messages.

 * @buf_sz: socket receive buffer size.

 * @passcred: whether or not to enable receiving the SCM_CREDENTIALS control

 *	message.

 *

 * Returns: a socket descriptor upon success or -1 upon failure.

 */

int uevent_open_socket(int buf_sz, bool passcred) {

    int s = uevent_create_socket(buf_sz, passcred);

    if (s < 0) {

        return -1;

    }



    if (uevent_bind(s) < 0) {

        close(s);

        return -1;

    }