From f087aa3581b13254e4de34784631f1852a9ddbec Mon Sep 17 00:00:00 2001 From: Pino Toscano Date: Mon, 8 Jul 2019 15:25:52 +0100 Subject: [PATCH 06/39] block/ssh: Convert from DPRINTF() macro to trace events MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit RH-Author: Pino Toscano Message-id: <20190708152601.21123-2-ptoscano@redhat.com> Patchwork-id: 89415 O-Subject: [RHEL-8.1.0 qemu-kvm PATCH v3 01/10] block/ssh: Convert from DPRINTF() macro to trace events Bugzilla: 1513367 RH-Acked-by: Philippe Mathieu-Daudé RH-Acked-by: Max Reitz RH-Acked-by: Miroslav Rezanina RH-Acked-by: Markus Armbruster From: Laurent Vivier Signed-off-by: Laurent Vivier Reviewed-by: Richard W.M. Jones Reviewed-by: Philippe Mathieu-Daudé Message-id: 20181213162727.17438-2-lvivier@redhat.com [mreitz: Fixed type of ssh_{read,write}_return's parameter to be ssize_t instead of size_t] Signed-off-by: Max Reitz (cherry picked from commit 023908a24de4f264dbcd22352e8a304424005bd4) Signed-off-by: Pino Toscano Signed-off-by: Danilo C. L. de Paula --- block/ssh.c | 46 +++++++++++++++++----------------------------- block/trace-events | 17 +++++++++++++++++ 2 files changed, 34 insertions(+), 29 deletions(-) diff --git a/block/ssh.c b/block/ssh.c index 6a55d82..dfb3e3c 100644 --- a/block/ssh.c +++ b/block/ssh.c @@ -41,27 +41,17 @@ #include "qapi/qmp/qstring.h" #include "qapi/qobject-input-visitor.h" #include "qapi/qobject-output-visitor.h" +#include "trace.h" -/* DEBUG_SSH=1 enables the DPRINTF (debugging printf) statements in - * this block driver code. - * +/* * TRACE_LIBSSH2= enables tracing in libssh2 itself. Note * that this requires that libssh2 was specially compiled with the * `./configure --enable-debug' option, so most likely you will have * to compile it yourself. The meaning of is described * here: http://www.libssh2.org/libssh2_trace.html */ -#define DEBUG_SSH 0 #define TRACE_LIBSSH2 0 /* or try: LIBSSH2_TRACE_SFTP */ -#define DPRINTF(fmt, ...) \ - do { \ - if (DEBUG_SSH) { \ - fprintf(stderr, "ssh: %-15s " fmt "\n", \ - __func__, ##__VA_ARGS__); \ - } \ - } while (0) - typedef struct BDRVSSHState { /* Coroutine. */ CoMutex lock; @@ -336,7 +326,7 @@ static int check_host_key_knownhosts(BDRVSSHState *s, switch (r) { case LIBSSH2_KNOWNHOST_CHECK_MATCH: /* OK */ - DPRINTF("host key OK: %s", found->key); + trace_ssh_check_host_key_knownhosts(found->key); break; case LIBSSH2_KNOWNHOST_CHECK_MISMATCH: ret = -EINVAL; @@ -721,8 +711,7 @@ static int connect_to_ssh(BDRVSSHState *s, BlockdevOptionsSsh *opts, } /* Open the remote file. */ - DPRINTF("opening file %s flags=0x%x creat_mode=0%o", - opts->path, ssh_flags, creat_mode); + trace_ssh_connect_to_ssh(opts->path, ssh_flags, creat_mode); s->sftp_handle = libssh2_sftp_open(s->sftp, opts->path, ssh_flags, creat_mode); if (!s->sftp_handle) { @@ -890,7 +879,7 @@ static int coroutine_fn ssh_co_create_opts(const char *filename, QemuOpts *opts, /* Get desired file size. */ ssh_opts->size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), BDRV_SECTOR_SIZE); - DPRINTF("total_size=%" PRIi64, ssh_opts->size); + trace_ssh_co_create_opts(ssh_opts->size); uri_options = qdict_new(); ret = parse_uri(filename, uri_options, errp); @@ -946,7 +935,7 @@ static void restart_coroutine(void *opaque) BDRVSSHState *s = bs->opaque; AioContext *ctx = bdrv_get_aio_context(bs); - DPRINTF("co=%p", restart->co); + trace_ssh_restart_coroutine(restart->co); aio_set_fd_handler(ctx, s->sock, false, NULL, NULL, NULL, NULL); aio_co_wake(restart->co); @@ -974,13 +963,12 @@ static coroutine_fn void co_yield(BDRVSSHState *s, BlockDriverState *bs) wr_handler = restart_coroutine; } - DPRINTF("s->sock=%d rd_handler=%p wr_handler=%p", s->sock, - rd_handler, wr_handler); + trace_ssh_co_yield(s->sock, rd_handler, wr_handler); aio_set_fd_handler(bdrv_get_aio_context(bs), s->sock, false, rd_handler, wr_handler, NULL, &restart); qemu_coroutine_yield(); - DPRINTF("s->sock=%d - back", s->sock); + trace_ssh_co_yield_back(s->sock); } /* SFTP has a function `libssh2_sftp_seek64' which seeks to a position @@ -1003,7 +991,7 @@ static void ssh_seek(BDRVSSHState *s, int64_t offset, int flags) bool force = (flags & SSH_SEEK_FORCE) != 0; if (force || op_read != s->offset_op_read || offset != s->offset) { - DPRINTF("seeking to offset=%" PRIi64, offset); + trace_ssh_seek(offset); libssh2_sftp_seek64(s->sftp_handle, offset); s->offset = offset; s->offset_op_read = op_read; @@ -1019,7 +1007,7 @@ static coroutine_fn int ssh_read(BDRVSSHState *s, BlockDriverState *bs, char *buf, *end_of_vec; struct iovec *i; - DPRINTF("offset=%" PRIi64 " size=%zu", offset, size); + trace_ssh_read(offset, size); ssh_seek(s, offset, SSH_SEEK_READ); @@ -1038,9 +1026,9 @@ static coroutine_fn int ssh_read(BDRVSSHState *s, BlockDriverState *bs, */ for (got = 0; got < size; ) { again: - DPRINTF("sftp_read buf=%p size=%zu", buf, end_of_vec - buf); + trace_ssh_read_buf(buf, end_of_vec - buf); r = libssh2_sftp_read(s->sftp_handle, buf, end_of_vec - buf); - DPRINTF("sftp_read returned %zd", r); + trace_ssh_read_return(r); if (r == LIBSSH2_ERROR_EAGAIN || r == LIBSSH2_ERROR_TIMEOUT) { co_yield(s, bs); @@ -1094,7 +1082,7 @@ static int ssh_write(BDRVSSHState *s, BlockDriverState *bs, char *buf, *end_of_vec; struct iovec *i; - DPRINTF("offset=%" PRIi64 " size=%zu", offset, size); + trace_ssh_write(offset, size); ssh_seek(s, offset, SSH_SEEK_WRITE); @@ -1108,9 +1096,9 @@ static int ssh_write(BDRVSSHState *s, BlockDriverState *bs, for (written = 0; written < size; ) { again: - DPRINTF("sftp_write buf=%p size=%zu", buf, end_of_vec - buf); + trace_ssh_write_buf(buf, end_of_vec - buf); r = libssh2_sftp_write(s->sftp_handle, buf, end_of_vec - buf); - DPRINTF("sftp_write returned %zd", r); + trace_ssh_write_return(r); if (r == LIBSSH2_ERROR_EAGAIN || r == LIBSSH2_ERROR_TIMEOUT) { co_yield(s, bs); @@ -1185,7 +1173,7 @@ static coroutine_fn int ssh_flush(BDRVSSHState *s, BlockDriverState *bs) { int r; - DPRINTF("fsync"); + trace_ssh_flush(); again: r = libssh2_sftp_fsync(s->sftp_handle); if (r == LIBSSH2_ERROR_EAGAIN || r == LIBSSH2_ERROR_TIMEOUT) { @@ -1236,7 +1224,7 @@ static int64_t ssh_getlength(BlockDriverState *bs) /* Note we cannot make a libssh2 call here. */ length = (int64_t) s->attrs.filesize; - DPRINTF("length=%" PRIi64, length); + trace_ssh_getlength(length); return length; } diff --git a/block/trace-events b/block/trace-events index c35287b..4c69548 100644 --- a/block/trace-events +++ b/block/trace-events @@ -150,3 +150,20 @@ nvme_free_req_queue_wait(void *q) "q %p" nvme_cmd_map_qiov(void *s, void *cmd, void *req, void *qiov, int entries) "s %p cmd %p req %p qiov %p entries %d" nvme_cmd_map_qiov_pages(void *s, int i, uint64_t page) "s %p page[%d] 0x%"PRIx64 nvme_cmd_map_qiov_iov(void *s, int i, void *page, int pages) "s %p iov[%d] %p pages %d" + +# block/ssh.c +ssh_restart_coroutine(void *co) "co=%p" +ssh_flush(void) "fsync" +ssh_check_host_key_knownhosts(const char *key) "host key OK: %s" +ssh_connect_to_ssh(char *path, int flags, int mode) "opening file %s flags=0x%x creat_mode=0%o" +ssh_co_yield(int sock, void *rd_handler, void *wr_handler) "s->sock=%d rd_handler=%p wr_handler=%p" +ssh_co_yield_back(int sock) "s->sock=%d - back" +ssh_getlength(int64_t length) "length=%" PRIi64 +ssh_co_create_opts(uint64_t size) "total_size=%" PRIu64 +ssh_read(int64_t offset, size_t size) "offset=%" PRIi64 " size=%zu" +ssh_read_buf(void *buf, size_t size) "sftp_read buf=%p size=%zu" +ssh_read_return(ssize_t ret) "sftp_read returned %zd" +ssh_write(int64_t offset, size_t size) "offset=%" PRIi64 " size=%zu" +ssh_write_buf(void *buf, size_t size) "sftp_write buf=%p size=%zu" +ssh_write_return(ssize_t ret) "sftp_write returned %zd" +ssh_seek(int64_t offset) "seeking to offset=%" PRIi64 -- 1.8.3.1