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configurable sftp_buf_sz.

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default value 131072 is derived from qemu/block/ssh.c.
we need more investigaion.
This commit is contained in:
Ryo Nakamura
2022-10-23 21:43:44 +09:00
parent e6339bf464
commit 79e717d1ed
5 changed files with 56 additions and 42 deletions
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20
src/ssh.c
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@@ -245,21 +245,13 @@ void ssh_sftp_close(sftp_session sftp)
}
/* from libssh/src/channels.c:
*
* All implementations MUST be able to process packets with an
* uncompressed payload length of 32768 bytes or less and a total packet
* size of 35000 bytes or less.
*/
#define CHANNEL_MAX_PACKET 32768
int sftp_write2(sftp_file sf, const void *buf, size_t len)
int sftp_write2(sftp_file sf, const void *buf, size_t len, size_t sftp_buf_sz)
{
int n, ret, nbytes;
int ret, nbytes;
for (nbytes = 0; nbytes < len;) {
ret = sftp_write(sf, buf + nbytes,
min(len - nbytes, CHANNEL_MAX_PACKET));
min(len - nbytes, sftp_buf_sz));
if (ret < 0)
return ret;
nbytes += ret;
@@ -267,13 +259,13 @@ int sftp_write2(sftp_file sf, const void *buf, size_t len)
return nbytes;
}
int sftp_read2(sftp_file sf, void *buf, size_t len)
int sftp_read2(sftp_file sf, void *buf, size_t len, size_t sftp_buf_sz)
{
int n, ret, nbytes;
int ret, nbytes;
for (nbytes = 0; nbytes < len;) {
ret = sftp_read(sf, buf + nbytes,
min(len - nbytes, CHANNEL_MAX_PACKET));
min(len - nbytes, sftp_buf_sz));
if (ret < 0)
return ret;
nbytes += ret;