This commit removes unnecessary file duplication and memory allocation when
passing file descriptors through Unix domain sockets, leveraging the new
filep reference counting framework.
Background:
With the new filep framework, file structures (filep) can be safely shared
across processes using reference counting. When passing file descriptors
through SCM_RIGHTS control messages on local sockets, the previous
implementation unnecessarily duplicated the entire file structure.
Changes:
1. In local_sendctl() (sender side):
- Removed allocation of filep2 structure (kmm_zalloc)
- Removed file_dup2() call that copied the file structure
- Now directly stores the original filep with its reference count
- Eliminates memory allocation overhead and potential failure points
2. In local_recvctl() (receiver side):
- Changed from file_close() + kmm_free() to file_put()
- file_put() properly decrements reference count and handles cleanup
- Consistent with the new filep reference counting model
3. In local_freectl() (cleanup on error):
- Changed from file_close() + kmm_free() to file_put()
- Ensures proper reference count management during error paths
Technical Details:
The new filep framework ensures that:
- Multiple file descriptors across different processes can reference the
same underlying filep structure safely
- Reference counting (via file_get/file_put) manages lifetime correctly
- The underlying file object is only released when all references are gone
This change is safe because file_dup() in the receiver already calls
file_get() internally to increment the reference count for the new fd,
so the filep remains valid after the sender calls file_put().
Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
SO_SNDBUF takes effect only after the connection in STREAM mode
is successful
support full life cycle modification of SO_RCVBUF
Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
For udp localsocket current implementation,the sent information only carries the packet info.
The receiver receives the information,it don't know who the information comes from.
Thus the receiver doesn't know who to send the response message to.
We add sender's binding path info in the information,the receiver knows who sent the information
based on the parsed information.
The receiver knows who to send the response message to.
Signed-off-by: wangchen <wangchen41@xiaomi.com>
move the accept logic into connect flow.
In order to successfully establish a blocking connection between
the client and server on the same thread.
nonblock is not affected, and the block connect is now the same
as the nonblock flow, other apis are not affected.
Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
Some programs use EAGAIN to determine whether all data has been read,
so cancel the error print when the error code is EAGAIN.
Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
Verifiction:
Write a bigger packet and read the packet using a smaller buffer.
The return length of reading should be the length of smaller buffer.
Signed-off-by: liqinhui <liqinhui@xiaomi.com>
Add the proccessing logic of udp socketpair, and modify the
logic of sending and receiving for udp socketpair.
Verification:
- Use the socketpair interface to create a pair of local udp sockets,
and perform read and write operations.
Signed-off-by: liqinhui <liqinhui@xiaomi.com>
adapts to third-party code compilation. in the process of porting ConnMan,
multiple control message options are enabled, such as IPV6_RECVPKTINFO and
IPV6_RECVHOPLIMIT, so I changed the Filling implementation of the control
message.
Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
Implement si_send/sendto/recvfrom with si_sendmsg/recvmsg, instead of
the other way round.
Change-Id: I7b858556996e0862df22807a6edf6d7cfe6518fc
Signed-off-by: Peter Bee <bijunda1@xiaomi.com>
2021-03-05 04:46:13 -08:00
Renamed from net/local/local_recvfrom.c (Browse further)
